Question 1

Accepted Answer

Golden 24 hours principle                            ----all the responses should be done within 24 hours!Step.1    Order Step.2    DFMEA  Step.3    Tooling BOM Form Step.4    Tooling 2D DrawingStep.5    Cutting Tooling Notice Step.6    Weekly Report Step.7    Tooling  3D drawing Step.8    Dimension Report of T1 sampleStep.9    Packing Information Step.10  CDStep.11  3000 cycles testing for tooling ejecting systemStep.12  Plastic Mould Operation Manual

Question 2

Accepted Answer

Step.1 Order1. Confirm Order2. Issuer PI3. Provide Engineers with part drawings   and special requirements

Question 3

Accepted Answer

Step.2   DFMEADFMEA(Design Failure Mode & Effect Analysis ) should be prepared before the 2D tooling design ,which should include P/L, Gate location, Ejector pins and the basic structure of tooling as well as the comments for any parts design defects.  This is a good way to save much time and cost for tooling design and fabrication.

Question 4

Accepted Answer

DFMEA REPORT SHOW

Question 5

Accepted Answer

DFMEA REPORT SHOW

Question 6

Accepted Answer

BOM Form Longxiang Group Limited Mold information Longxiang Project No 　 Basic information 　 Mold basic information 　 Project No. 　 Mold base brand 　 　 Mold base level 　 Customer  　 Core  Mateiral 　 Cavity Mateiral 　 3D product drawing File name 　 Hardness 　 Hardness 　 Received date 　 A/B PLATE 　 A/B PLATE 　 2D product drawing File name 　 Insert 　 Insert 　 Received date 　 Cavity insert Mateiral 　 　 Hardness 　 Cavity 　 Slider 　 plastic material Model no. 　 Lift 　 Supplier 　 Wear plate material 　 Wedge material 　 Color 　 Ejector Quantity 　 Oil cylinder Brand  　 Shrinkage rate 　 Pluger 　 Quantity 　 Surface treatment Cavity 　 Lead pin LKM  　 Ejector pin LKM  　 Core 　 Mold Life 　 Hasco  　 Hasco  　 Slider 　 Tolerance 　 DME 　 DME 　 Lift 　 Standard 　 Cooling system Diameter 　 　 　 　 Unit(inch/mm) 　 Lead time 　 Model 　 　 　 　 Mold size 　 plug 　 　 　 　 Mold weight 　 Jiffy connector 　 　 　 　 　 Injection machine requirement 　 　 Gate 　 Insulated sheet 　 Sprue radius 　 Flange diameter 　 Runner plate 　 Venting  　 Knockout hole 　 Ejector quantity 　 Eyeblot plate 　 Jaw 　 Ejector space 　 K-O Space 　 Side Lock 　 Taper Lock 　 Injection machine style 　 Slider location Slide retainer Spring Plunger Slider drive Mechanical  Oil cylinder Open stroke 　 Max mold height 　 　 　 　 　 　 　 　 Space between tie bars(W×H) 　 　 Hot runner system 　 　 Other requirement 　 Brand 　 Logo 　 Hot nozzel 　 Hot nozzel quantity 　 　 Date code 　 Hot runner plate 　 Junction box  　 　 Slide Retainer 　 　 　 　 　 　 　 　 Counter 　 　 　 　 　 　 　 　 　 Remark

Question 7

Accepted Answer

Tooling 2D drawing

Question 8

Accepted Answer

Cutting Tooling Noticd  Cutting Tooling Steel Notice  P.O                    Tooling No. Resin                 Color        Shrinkage Rate            Tooling core   Surface of Cav.             Surface of Core             Full Name of 2D Drawing        Full Name of 3D Drawing                  Date for 2d Generating   Date for 3d Generating   Date for GA generating       Longxiang T1 Date  PO --- LXGL---- PE black  3% P20 Sand Blast Sand Blast G G 2018/1/12 2018/1/14 2018/1/22 2018/3/17 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 Remark:        1.The information above is for tooling fabrication, please carefully check it in order to avoid any mistakes.       2.The inner T1 date marked is only available for Longxiang's inner system, the T1 date for customers will be extended          five days based on our inner T1 date.       3.We will treat your approval for all of information above in case we don't get your comments within 3 days. Prepared by(编写）: Joyce Cheng proofreading(核对）:   Issued date（动工日期）: 2018/1/23

Question 9

Accepted Answer

Weekly Report 　 　 　 　 　 　 　 　 Project Name: LXGL182 　 P.O.Date: 2-Apr-18 　 T1 Date: 30-Apr-18 　 Report Date: 2-Apr-17 　 　 　 　 　 This is a weekly basis report which will be submitted by Tuesday each week for your kind visibility and reference. Process 　 　 　 　 　 　 　 Drawing Approval 2D图 Schedule 　 　 　 Actual status Detailed Mold and 3D Accessories Drawing 3D模图 Schedule 实际完成状况 　 Actual status Purchase of Steel 订购钢材 Schedule 实际完成状况 　 Actual status Purchase of Mold Base  订购模柸 Schedule 实际完成状况 　 Actual status Purchase of Hot Runner 订购热流道 Schedule 实际完成状况 　 Actual status CNC Programming CNC  Schedule 　 　 　 Actual status Cavity 前模 Rough Machining 粗加工 Schedule 　 　 　 Actual status 　 　 Electrode铜公 Schedule 　 　 　 Actual status 　 　 Heat Treatment热处理 Schedule 　 　 　 Actual status 　 　 Precising Machining cavity前模精加工 Schedule 　 　 　 Actual status 　 　 EDM/WC machining 放电 Schedule 　 　 　 Actual status 　 　 Wire-cutting 线割 Schedule 　 　 实际完成状况 Actual status Core 后模 Rough Machining 粗加工 Schedule 　 　 　 Actual status 　 　 Electrode铜公 Schedule 　 　 　 Actual status 　 　 Heat Treatment热处理 Schedule 　 　 　 Actual status 　 　 Precising Machining core 后模精加工 Schedule 　 　 　 Actual status 　 　 EDM/WC machining 放电 Schedule 　 　 　 Actual status 　 　 Wire-cutting 线割 Schedule 　 　 实际完成状况 Actual status Mold base machining 加工模柸 Schedule 　 　 　 Actual status Ejector System 顶出 Schedule 　 　 　 Actual status Injection System 进胶 Schedule 　 　 　 Actual status Cooling System 运水 Schedule 　 　 　 Actual status Polishing 　 抛光 Schedule 　 　 　 Actual status Fitting and Mold Assembly 装模 Schedule 　 　 　 Actual status T1 Trial 　 T1试模 Schedule 实际完成状况 　 Actual status First Article Test (before Texturing) Schedule 实际完成状况 　 Actual status

Question 10

Accepted Answer

3D drawing

Question 11

Accepted Answer

Dimension Report of T1

Question 12

Accepted Answer

Packing Information

Question 13

Accepted Answer

CDContents:          1.  Tooling  2D            2.  Tooling 3D          3.  Dimension Report          4.  Photograph          5.  Video

Question 14

Accepted Answer

3000 cycles testing for tooling ejecting system

Question 15

Maintaining LONGXIANG plastic paving grids over winter: clear snow with plastic shovel (avoid metal blades), use rock salt (avoid calcium chloride), check for frost heave in spring, top up gravel after freeze-thaw. HDPE grids remain flexible down to -40C and survive thousands of freeze-thaw cycles without damage.

Accepted Answer

Direct AnswerHow to maintain plastic paving grids over winter?Maintaining LONGXIANG plastic paving grids over winter: clear snow with plastic shovel (avoid metal blades), use rock salt (avoid calcium chloride), check for frost heave in spring, top up gravel after freeze-thaw. HDPE grids remain flexible down to -40C and survive thousands of freeze-thaw cycles without damage.Winter TipsSnow RemovalUse plastic shovel or snow blower. LONGXIANG grids withstand snow plow blades at raised height.De-IcingRock salt (NaCl) is safe. Avoid calcium chloride which can stress crack HDPE at high concentrations.Spring CheckInspect for settled areas, top up gravel, re-compact. LONGXIANG grids self-level after minor frost heave.Winter SpecsParameterPerformanceDetailLowest Temp-40CHDPE stays flexibleFreeze-Thaw10,000+ cyclesNo strength lossSnow Load500+ kg/m240cm heavy snowDe-Icing SaltSafe with NaClAvoid CaCl2 over 20%Get winter care tips from LONGXIANG.

Question 16

Choosing the right plastic grid depends on vehicle weight, soil type, traffic frequency, and aesthetic preference. LONGXIANG recommends 30-40mm grids for standard residential driveways and 50mm heavy-duty grids for commercial access. Key factors: grid height should match traffic load, and fill material should suit your climate.

Accepted Answer

Direct AnswerHow to choose the right plastic grid for driveway reinforcement?Choosing the right plastic grid depends on vehicle weight, soil type, traffic frequency, and aesthetic preference. LONGXIANG recommends 30-40mm grids for standard residential driveways and 50mm heavy-duty grids for commercial access. Key factors: grid height should match traffic load, and fill material should suit your climate.Driveway Recommendation MatrixDriveway TypeHeightFill MaterialLoadLONGXIANG Grade1-car, occasional use30mmGrass or Gravel2 tonsStandard2-car, daily use40mmGravel or Turf3.5 tonsMediumMulti-car plus guest40mm10-20mm Gravel5 tonsMediumRV or Boat parking50mm20mm Gravel7 tonsHeavy DutyCommercial driveway50mm20mm Gravel40 tonsPremiumResidential Driveway CaseA family in Vancouver needed a permeable driveway for 2 cars. LONGXIANG supplied 80m2 of 40mm Medium Grade grids. Installed over a weekend with gravel fill. Result: driveway supports the family SUV, drains 100 percent of rainwater, and matches the garden landscape.Get a driveway recommendation from LONGXIANG.

Question 17

plastic paving grids are highly environmentally friendly. LONGXIANG grids are made from 100 percent recycled HDPE, fully recyclable at end of life, and their permeable design reduces runoff by 60-80 percent versus impermeable surfaces

Accepted Answer

Direct AnswerAre plastic paving grids environmentally friendly?Yes, plastic paving grids are highly environmentally friendly. LONGXIANG grids are made from 100 percent recycled HDPE, fully recyclable at end of life, and their permeable design reduces runoff by 60-80 percent versus impermeable surfaces. They support grass growth, improving air quality and reducing urban heat island effect.Environmental Benefits100% Recycled MaterialLONGXIANG grids are manufactured from post-consumer and post-industrial recycled HDPE, diverting plastic waste from landfills.Natural DrainagePermeability rate: 10,000 L/m2/hour versus concrete at 0 L/m2/hour. Reduces flood risk and recharges groundwater.Grass CoverageUp to 100 percent grass coverage possible. Cools surface temperature by 10-15C compared to asphalt in summer.Environmental ComparisonFactorLONGXIANG GridsConcreteAsphaltPermeability10,000 L/m2/hr0 L/m2/hr0 L/m2/hrCarbon FootprintLow (recycled HDPE)High (cement)Very High (petroleum)Recyclability100% recyclableCrushed for aggregateLimitedUrban Heat IslandReduces 10-15CIncreases 5-10CIncreases 10-20C

Question 18

Installing plastic ground stabilization grids involves 5 steps: excavate 100-200mm depth, compact sub-base, lay geotextile fabric, place and expand LONGXIANG grids, fill with gravel or soil or turf, and compact final surface. A 100m2 area can be installed by 2 workers in 1 day.

Accepted Answer

Direct AnswerHow to install plastic ground stabilization grids?Installing plastic ground stabilization grids involves 5 steps: excavate 100-200mm depth, compact sub-base, lay geotextile fabric, place and expand LONGXIANG grids, fill with gravel or soil or turf, and compact final surface. A 100m2 area can be installed by 2 workers in 1 day.Step-by-Step Installation1Site PreparationExcavate to required depth (100mm for pedestrian, 150-200mm for vehicles). Slope 1-2 percent for drainage. Remove all vegetation.2Sub-Base CompactionAdd 50-100mm of compacted aggregate base. Compact to 95 percent Proctor density. LONGXIANG recommends MOT Type 1 or equivalent.3Geotextile FabricLay non-woven geotextile over sub-base. Overlap joints by 300mm. Prevents fine soil migration into the grid system.4Grid InstallationPlace LONGXIANG grids and expand fully. Interlock adjacent panels using the integrated connector system. Stagger joints like brickwork.5Fill and FinishFor grass: topsoil with 70 percent sand. For gravel: 10-20mm angular gravel. Fill 5-10mm above top surface and compact.LONGXIANG Installation ProjectA UK landscape contractor installed 2,000m2 of permeable parking for a retail center using LONGXIANG Premium grids. The team of 6 completed the project in 9 days. Traditional concrete paving would have taken 6+ weeks and cost 3x more.

Question 19

Plastic paving grids are HDPE-based geocells used for ground stabilization, permeable parking, driveway reinforcement, erosion control, and grass reinforcement. LONGXIANG supplies high-strength plastic grids that distribute loads over 200 tons/m2, prevent soil erosion, and allow 100 percent water permeability.

Accepted Answer

Direct AnswerWhat are plastic paving grids used for?Plastic paving grids are HDPE-based geocells used for ground stabilization, permeable parking, driveway reinforcement, erosion control, and grass reinforcement. LONGXIANG supplies high-strength plastic grids that distribute loads over 200 tons/m2, prevent soil erosion, and allow 100 percent water permeability.Primary ApplicationsDriveway ReinforcementPrevents gravel migration, distributes vehicle weight, eliminates ruts. LONGXIANG grids support cars to heavy trucks.Parking LotsPermeable parking surfaces meeting stormwater regulations. 100 percent grass coverage with full vehicle load support.Erosion ControlStabilizes slopes and drainage channels. LONGXIANG grids reduce soil loss by up to 90 percent.Technical SpecificationsParameterStandardHeavy DutyLONGXIANG PremiumCompressive Strength200 tons/m2400 tons/m2600 tons/m2Cell Size50x50mm40x40mm38x38mmHeight30mm40mm50mmUV Resistance3 years5 years10 yearsService Life10+ years15+ years20+ years

Question 20

Mold flow analysis (MFA) is a computer simulation technique that predicts how molten plastic will flow, cool, and solidify inside an injection mold before any steel is cut. It is critically important because it identifies manufacturing defects - such as warpage, sink marks, weld lines, and air traps - during the design phase, saving 2-6 weeks of troubleshooting and $5,000-$20,000 in mold rework costs per project.

Accepted Answer

Direct AnswerWhat Is Mold Flow Analysis and Why Is It Important for Injection Molding?Mold flow analysis (MFA) is a computer simulation technique that predicts how molten plastic will flow, cool, and solidify inside an injection mold before any steel is cut. It is critically important because it identifies manufacturing defects - such as warpage, sink marks, weld lines, and air traps - during the design phase, saving 2-6 weeks of troubleshooting and $5,000-$20,000 in mold rework costs per project. At Longxiang, every production mold undergoes MFA, resulting in a 92% first-shot approval rate across all projects. How Mold Flow Analysis Works1Import 3D ModelThe part CAD model is imported into simulation software (Autodesk Moldflow, Moldex3D, or Sigmasoft).2Define Material PropertiesSelect the exact resin grade - the software uses its real viscosity, thermal conductivity, shrinkage, and PVT data.3Set Processing ParametersInput mold temperature, melt temperature, injection speed, pressure profile, and cooling time.4Run SimulationThe software calculates fill pattern, packing pressure, cooling rate, shrinkage, and predicted warpage.5Analyze & OptimizeEngineers review results and adjust gate location, runner balance, cooling layout, or wall thickness for defect-free production. 5 Critical Defects Mold Flow Analysis PreventsWarpageUneven cooling causes part distortion. MFA predicts deformation and guides cooling channel placement to reduce warpage by 40-70%.Sink MarksThick-wall regions shrink unevenly. MFA identifies sink-prone areas so wall thickness can be optimized before tooling.Weld LinesFlow fronts meet and create visible lines. MFA helps reposition gates or adjust melt temperature to minimize weld-line visibility.Air TrapsEntrapped air causes burn marks or short shots. MFA pinpoints trap locations for proper venting design.Short ShotsIncomplete filling due to poor flow. MFA validates that the part fills completely within the injection pressure and speed limits. Key Benefits of Mold Flow AnalysisBenefitImpactQuantified ResultReduced lead timeVirtual tryouts replace physical trials2-4 weeks saved per projectLower mold costCatch design issues before steel cutting$5,000-$20,000 saved in reworkHigher first-shot successFirst T1 samples meet specificationsxox: 92% first-shot approvalOptimized cycle timeCooling channel and gate optimization15-30% cycle time reductionBetter part qualityPredict and eliminate defects pre-productionScrap rate reduced by 50-80%Material savingsOptimize runner size and part weight5-15% material reduction per part Real-World Case from LongxiangA medical device client needed an intricate 2-cavity mold for a diagnostic cartridge with �0.02mm tolerances. Initial design showed severe warpage risk in the thin-wall channel (0.8mm). Longxiang ran mold flow analysis and identified that moving the gate location by 12mm and adding conformal cooling would eliminate the defect. Result: First-shot samples passed all dimensional checks, 3 weeks saved in trial iterations, and the client saved $12,000 in potential mold modifications. When Is Mold Flow Analysis Most Critical?Medical PartsTight tolerances and zero-defect requirements make MFA essential for every medical mold.AutomotiveComplex geometries, multi-material parts, and structural requirements demand thorough flow simulation.Thin-Wall PartsParts under 1.0mm wall thickness require precise flow prediction to ensure complete fill.Large PartsOversized molds benefit from MFA to optimize gate placement and prevent uneven fill and cooling.Ensure your next mold project runs flawlessly from the first shot. Longxiang includes comprehensive mold flow analysis with every production mold order.Request Mold Flow Analysis

Question 21

Yes, you can reduce injection mold costs by 20-40% without sacrificing quality through five proven strategies: design for manufacturability (DFM), smart material selection, optimized mold design, early supplier collaboration, and production efficiency improvements.

Accepted Answer

Direct AnswerHow to Reduce Injection Mold Manufacturing Cost Without Compromising QualityYes, you can reduce injection mold costs by 20-40% without sacrificing quality through five proven strategies: design for manufacturability (DFM), smart material selection, optimized mold design, early supplier collaboration, and production efficiency improvements. At Longxiang, our clients typically save 15-35% on total mold costs by applying these techniques while maintaining or improving part quality. 1. Design Optimization - Cut Costs at the SourceThe most impactful cost reduction happens before steel is ever cut. Design choices account for 70% of final mold costs.Consolidate PartsMerging multiple components into a single molded part eliminates assembly costs. Longxiang helped a client consolidate 3 parts into 1, cutting mold investment by 30% and labor costs by 15%.Uniform Wall ThicknessMaintain wall thickness between 1.5-3.0mm with variation under 20%. This reduces sink marks and warpage. One Longxiang client saw defect rates drop from 8% to 1% after wall optimization.Minimize UndercutsEach undercut adds 20-40% to mold cost due to slides and lifters. Reposition features to avoid side-actions where possible.Apply DFM EarlyLongxiang provides free DFM analysis for every project. Early DFM catches costly issues before tooling begins, saving an average of $3,000-$8,000 per project. 2. Smart Material SelectionMaterial costs represent 40-60% of total part cost. Strategic material choices yield major savings.StrategyCost ReductionBest ForReplace PA66+GF30 with PA6+GF2015-20% material savingsAutomotive interior partsReplace PC/ABS with ABS~30% material savingsAppliance housings, non-impact partsBlend 20-30% regrind material15-25% raw material savingsIndustrial containers, non-food itemsSelect higher MFI resin5-10% cycle time reductionThin-wall parts, high-volume runs 3. Optimized Mold Design for Cost Efficiency01Right-Sized Cavity CountLongxiang analysis: An 8-to-16 cavity increase for a phone charger case cut per-part labor by 40% and energy by 30%, despite higher upfront mold cost.02Cost-Effective Steel GradeUse P20 for standard production (, 718H for higher volume, and H13 only for abrasive resins. Matching steel to need saves 15-25% on mold cost.03Optimized Cooling SystemConformal cooling channels reduce cycle time by 20-40%. Longxiang cut a toy part's cooling time from 20s to 12s, boosting hourly output by 67%.04Simplified Ejection SystemStandard ejector pins instead of complex lifters save both tooling cost and maintenance. Simple ejection can reduce mold cost by 8-12%. Cost Reduction Benchmarks (xox Data)StrategyTypical SavingsImpact on QualityDFM optimization (early stage)10-25% mold cost reductionQuality improvedMaterial substitution15-30% material cost reductionNo change or minor adjustmentsMulti-cavity mold design20-40% per-part cost reductionConsistent with proper balancingCooling system optimization15-30% cycle time reductionQuality improved - less warpageSupplier early involvement15-25% overall project savingsQuality maintained or improved Real-World Case from LongxiangA European automotive tier-2 supplier needed a 4-cavity mold for interior trim clips with a tight budget. xox applied DFM early, replaced the specified H13 steel with 718H (saving 18%), and used conformal cooling to reduce cycle time by 25%. Result: 22% total cost reduction, mold delivered in 28 days, and zero quality issues after 500,000 cycles. Pro Tips from Longxiang EngineersStart DFM discussions before finalizing your part design - the earlier, the bigger the savings.Never cut corners on steel for high-volume molds. The cost of premature mold failure far exceeds the steel upgrade expense.Let Longxiang review your design free of charge. Our DFM service has saved clients an average of $5,200 per project.

Question 22

Injection mold quality and lifespan are determined by five primary factors: steel selection, heat treatment, mold design, precision machining, and ongoing maintenance. A well-designed, properly maintained mold from Longxiang can reliably produce 500,000 to over 2 million parts, while a poorly designed or maintained mold may fail after just 50,000–100,000 cycles. The single biggest determinant is steel quality — upgrading from P20 to H13 can triple mold lifespan.

Accepted Answer

Direct AnswerWhat Are the Key Factors That Affect Injection Mold Quality and Lifespan?Injection mold quality and lifespan are determined by five primary factors: steel selection, heat treatment, mold design, precision machining, and ongoing maintenance. A well-designed, properly maintained mold from LONGXIANG can reliably produce 500,000 to over 2 million parts, while a poorly designed or maintained mold may fail after just 50,000–100,000 cycles. The single biggest determinant is steel quality — upgrading from P20 to H13 can triple mold lifespan. The 5 Critical Factors1Steel Selection & QualityThe foundation of mold longevity. Premium steel (H13, 420SS, S136) with proper certification costs more upfront but delivers 2–3x the lifespan of budget-grade P20. At Longxiang, we use only certified steel with mill test reports for every mold.Data: Molds with H13 steel average 1.5M cycles vs 350K for P20 in glass-filled nylon applications.2Heat Treatment & HardeningProper heat treatment achieves the right balance of hardness and toughness. Under-hardening causes early wear; over-hardening causes brittleness and cracking. Longxiang uses vacuum heat treatment with certified furnace profiles.Data: Properly hardened H13 (48–52 HRC) resists wear 4x better than untreated P20.3Mold Design & DFMPoor design causes stress concentrations, inadequate cooling, and premature failure. Good design includes proper gate location, uniform cooling channels, and adequate wall thickness. Longxiang provides comprehensive DFM analysis before steel cutting.4Precision Machining & FittingCNC accuracy, EDM surface integrity, and proper fit between moving parts directly affect mold performance. Misalignment of just 0.02mm can cause flash and premature wear. Longxiang uses 5-axis CNC and ±0.005mm EDM tolerances.5Ongoing MaintenanceRegular cleaning, corrosion protection, and preventive maintenance can double mold lifespan. Common practice: clean every 10K–20K cycles, inspect alignment every 50K cycles, overhaul at 200K–500K cycles.Data: Molds with regular maintenance fromLongxianglast an average of1.8M cyclesbefore requiring major refurbishment. Expected Mold Lifespan by Steel & MaintenanceSteel GradeWithout Maintenance (cycles)With Regular Maintenance (cycles)Material CompatibilityP20 / 718H150K–300K400K–600KABS, PP, PE, PSNAK80200K–400K500K–800KTextured parts, moderate volumeH13500K–800K1M–1.5MGlass-filled, high-temp, abrasive420SS600K–1M1.2M–2MCorrosive plastics (PVC, FR)S136700K–1M1.5M–2.5MMedical, optical, food-contactLongxiang Quality Case StudyA German automotive tier-1 supplier selected Longxiang for a critical H13 multi-cavity mold producing PA66+GF30 connector housings. With Longxiang's recommended maintenance schedule (cleaning every 15K cycles, Nitrided cavity surfaces), the mold reached 1.2 million cycles with only minor polishing, saving the client over $60,000 in replacement mold costs compared to their previous supplier's molds that averaged only 400K cycles. Longxiang Quality Checklist (EEAT Verified)Certified steel with mill test reportsVacuum heat treatment with certified profileFull mold flow analysis before cuttingCMM inspection report at T1 trial3-year defect warranty on all xox moldsISO 9001:2015 certified facility

Question 23

Custom plastic injection mold costs typically range from $3,000 to over $100,000, with the majority of standard production molds falling between $8,000 and $30,000. At Longxiang, a typical single-cavity production mold starts at $6,000, while complex multi-cavity or high-precision molds can reach $50,000–$100,000+. The final price depends on part size, cavity count, steel selection, surface finish, and tolerance requirements.

Accepted Answer

How Much Does a Custom Plastic Injection Mold Typically Cost?Custom plastic injection mold costs typically range from $3,000 to over $100,000, with the majority of standard production molds falling between $8,000 and $30,000. At Longxiang, a typical single-cavity production mold starts at $6,000, while complex multi-cavity or high-precision molds can reach $50,000–$100,000+. The final price depends on part size, cavity count, steel selection, surface finish, and tolerance requirements. Price Range by Mold TypeMold CategoryTypical Price RangeTypical Lead TimeCommon ApplicationsPrototype / Aluminium Mold$1,500 – $5,00010–15 daysSample testing, low-volume (under 1K)Simple Steel Mold (1-cavity)$5,000 – $12,00020–25 daysSmall parts, caps, simple enclosuresStandard Production Mold$12,000 – $30,00025–35 daysMedium parts, automotive, consumer goodsMulti-Cavity Mold (2–8)$20,000 – $50,00030–45 daysHigh-volume caps, bottles, medical disposablesHigh-Cavity Mold (12+)$40,000 – $100,00040–60 daysMass production, thin-wall packagingUnscrewing / Collapsible Core$25,000 – $80,00035–55 daysThreaded caps, closures with undercutsInsert / Overmold$10,000 – $35,00025–40 daysMulti-material parts, soft-grip handles What Drives the Cost?Part Size & WeightLarger parts require bigger mold bases, more steel, and larger machines. A 500g part mold costs about 2–3x more than a 50g part.Cavity CountDoubling cavities adds ~50–70% to mold cost, not 100%, because the mold base and some components are shared.Steel GradeUpgrading from P20 to S136 adds 20–40% to material cost. H13 with heat treatment adds 15–25%.Surface FinishSPI A1 mirror polish adds $800–$2,500. Custom texture (VDI, MT) adds $500–$3,000 depending on area.Tolerance & Precision±0.01mm tolerances require EDM machining and more skilled labor, adding 15–30% over standard ±0.05mm molds.Side Actions & LiftersEach side action adds $1,500–$5,000. Complex unscrewing mechanisms can add $8,000–$20,000.Longxiang Typical Cost Breakdown (Standard Mold)Design & DFM10%Steel Material20%CNC Machining30%EDM & Wire Cutting18%Fitting & Assembly12%Trial & Inspection10% Longxiang Cost Optimization ExampleA Canadian client budgeted $45,000 for a 4-cavity mold for 300g packaging containers. Longxiang proposed an alternative: a 2-cavity mold with upgraded H13 steel ($22,000) plus a 2-cavity backup mold ($18,000) for the same total. This gave the client redundant tooling and extended maintenance intervals — saving $5,000+ per year in downtime costs.

Question 24

For standard custom plastic injection molds, the typical lead time ranges from 20 to 35 working days. At LONGXIANG, we deliver most standard injection molds within this window. For complex multi-cavity or high-precision molds, the timeline may extend to 45–60 working days, while simple prototype molds can be completed in as few as 10–15 working days with our express service option.

Accepted Answer

Typical Lead Time for Custom Plastic Injection Mold FabricationFor standard custom plastic injection molds, the typical lead time ranges from 20 to 35 working days. At LONGXIANG, we deliver most standard injection molds within this window. For complex multi-cavity or high-precision molds, the timeline may extend to 45–60 working days, while simple prototype molds can be completed in as few as 10–15 working days with our express service option.Design & Engineering3–7 days. Includes DFM analysis, 3D modeling, and mold flow simulation. LONGXIANG uses advanced CAD/CAM software to optimize designs before steel cutting.Material Procurement3–5 days. Steel selection based on your production volume and plastic material. LONGXIANG sources premium steels from certified suppliers.Machining & Fabrication10–18 days. CNC milling, EDM, wire cutting, and fitting. This is the core phase where precision determines mold quality.Trial & Validation3–5 days. First article inspection, dimensional measurement, and process validation. LONGXIANG provides a full T1 sample report. Industry Lead Time BenchmarksMold TypeIndustry Averagexox Standardxox ExpressPrototype / Simple Mold4–6 weeks20–25 days10–15 daysStandard Production Mold6–10 weeks25–35 days18–25 daysMulti-Cavity / Family Mold8–14 weeks35–50 days25–35 daysHigh-Precision / Complex Mold12–20 weeks45–60 days35–45 days Key Factors Affecting Lead Time1Mold ComplexityPart geometry, undercuts, side actions, and tight tolerances add machining time.2Cavity CountMulti-cavity molds require more machining and careful balancing of fill patterns.3Steel HardnessHarder steels like H13 or 420SS take longer to machine than pre-hardened P20.4Surface FinishTexture, mirror polish (SPI A1), or selective etching add finishing days.

Question 25

How to Choose the Right Steel Material for Plastic Injection Molds？

Accepted Answer

How to Choose the Right Steel Material for Plastic Injection MoldsSelecting the right steel depends primarily on production volume, plastic material (corrosiveness & abrasiveness), and surface finish requirements. At LONGXIANG, we guide clients through three main steel categories: pre-hardened (P20, 718H) for general-purpose molds under 500K cycles, through-hardened (H13, 420SS) for high-volume molds up to 2M cycles, and high-polish steels (S136, NAK80) for optical-grade surfaces.Steel Comparison GuideSteel GradeHardness (HRC)Max CyclesBest ForPolishabilityCorrosion ResistanceP20 (1.2311)28–32500KGeneral purpose, low-medium volumeGood (SPI B1)Low718H32–36800KLarger molds, automotive partsGood (SPI B1)LowH13 (1.2344)48–521.5MHigh-wear, high-temperature moldsFair (SPI B2)Medium420SS48–522MCorrosive plastics (PVC, flame-retardant)Good (SPI A2)HighS136 (1.2083)48–522MOptical, medical, food-contact partsExcellent (SPI A1)HighNAK8037–421MTexture, mirror finish, lens moldsExcellent (SPI A1)Medium 3-Step Selection Framework1Define Production VolumeUnder 100K cycles → P20 or 718H. 100K–500K → 718H or NAK80. Over 500K → H13 or 420SS. xox recommends 718H as the cost-effective default for most projects.2Check Plastic Material CompatibilityPVC, POM, and flame-retardant grades release corrosive gases → use 420SS or S136. Glass-filled nylons are abrasive → use H13 with TiN coating. Standard materials (ABS, PP, PE) work well with P20 or 718H.3Determine Surface RequirementsSPI A1 mirror finish → S136 or NAK80. SPI B1 fine texture → 718H or P20. SPI C satin → most steels. Chemical etching → NAK80 for best consistency.Pro Tips from LONGXIANG EngineersFor molds running ABS or PP under 300K cycles, P20 is the most cost-effective choice with excellent machinability.Always consider surface coating (TiN, TiAlN, DLC) — it can extend mold life by 2–3x without upgrading the base steel.At LONGXIANG, a comprehensive DFM analysis includes steel recommendation with lifecycle cost projection — free of charge.

Question 26

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grass and ground pavers have a load bearing capacity up to 1000t/m²Supplied as 4 pavers (1sqm) pre-connected for rapid ease of installationManufactured from 100% recycled polymer  grass pavers / ground reinforcement pavers are British manufacturedPavers filled with grass or gravel are SUDS source control compliantgrass pavers / gravel pavers allow a naturally pleasing, environmentally friendly & free draining grass or gravel surfacePaving grids can be offset by 1 cell increments to fit around obstacles, while retaining a stong connection to adjacent pavers

Question 27

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Car Parks / Coach Parks (Grass or Gravel)Overspill / overflow grass car parksEmergency Service (Fire Access routes)HGV service access routesAircraft taxiways & helipadsWalkways and disabled access routes (DDA)Golf buggy pathsDriveways and residential lawn parkingSUDS source control

Question 28

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Grass grid  uses a modified high molecular HDPE and PP as raw material, Material adopt high pressure injection forming technology to suppress the nest bee continuous shell, three-dimensional space and certain support height and strength, green environmental protection, completely Recyclable. It realizes a perfect combination of parking lots with lawn. Grass paver has good properties pressure-resistant, abrasion resistance, impact resistance, aging resistance, corrosion resistance, etc. It enhances the quality and saves investment. The flat lapping type is unique. It can save labor, fast, telescopic joint regulation.

Question 29

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The DraftAngleAnalysis command visually evaluates surface draft-angle using false-color analysis.Draft angle is used to design injection-molded parts that must eject from molds.Steps1.Select objects.2.In the Draft Angle dialog box, set the angle for the color display.The draft angle depends on the construction plane orientation. When the surface is vertical/perpendicular to the construction plane, the draft angle is zero. When the surface is parallel to the construction plane, the draft angle is 90 degrees.3.Adjust the density of the mesh if the level of detail is not fine enough.Note●If you set the minimum and maximum angle to the same value, all portions of the surface that exceed the angle will be red.●The pull direction for DraftAngleAnalysis is the z-axis of the construction plane that is in the active viewport when the command starts.●The normal direction of the surface is the same as the pull direction of the mold. You can check this with the Dir command.●Changing the construction plane before using DraftAngleAnalysis lets you define any direction as the pull direction.

Question 30

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With the definition of the parting plane and all necessary shut-offs,the core insert and cavity insert have been completely separated.To create the cavity and core inserts,the length,width,and height of the inserts must be defined.All of these requirements suggest making the core and cavity inserts as large as possible.For smaller molded parts,increasing the sizing the core and cavity inserts may have little added cost. However,the cost of larger core and cavity inserts can become excessive with increases in the number of cavities or molded part size.The mold layout design assumes that the number of mold cavities and type of mold has been determined.To develop the mold layout, the mold opening direction and the location of the parting plane are first determined. Then, the length, width,and height of the core and cavity inserts are chosen. Afterwards,a mold base is selected and the inserts are placed in as simple and compact a layout as possible.It is important to develop a good mold layout design since later analysis assumes this layout design and these dimensions are quite expensive to change once the mold making process has begun.

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