Just checking the external dimensions by simple prototyping is risky. Opening problems during mass production can be caused by improper prototype insert molding.
1.Aluminum or mild steel molds, which have insufficient strength, cannot endure the high-pressure injection during mass production.
2.Multi-cavity runner balance and venting design are ignored, resulting in filling imbalance and scorching problems during mass production.
3.The ejection arrangement is not properly planned, causing deformation or whitening of the ejected part during mass production.
Mass Production Prototype DFM Review
We adhere to the concept of prototype mass production, and the soft steel prototype mold is designed completely according to mass production standards, incorporating the insert molding design for manufacturing concept throughout the entire sampling process.
1.Mechanical calculations are conducted with mass production molds while assuming lateral pressure bearing rigidity.
2.Insert positions for venting are pre-allocated to guarantee venting is adequate.
3.An ejection system and runner structure that are closely matched to mass production molds are designed.
Additional to that, we offer a rapid tooling service to assist you with prototype verification and speed up your transition to mass production in the shortest possible time.
How JS Precision Optimizes the Injection Molding Project for Stainless Steel Pull-Pin Inserts in Automotive Connectors?
High-precision automotive connector injection molding projects form one of the major scenarios for the challenge adaptability test of professional insert molding service in complicated working conditions. We have cooperated with several automotive parts clients for problem-solving through multiple trial moldings failures, resulting in yield and cost production optimization.
Client's Original Pain Points
The client was looking for the customization of an automotive electronic control connector consisting of four high-precision machined SUS316L pins. The design as it was before, caused the pins to tilt 0.12mm displacement under the injection pressure of 95MPa so resulting in the dimensional deviations.
The top two suppliers were out of warranty for the five consecutive trial moldings leading to the batch scrap rate as high as 15%. Besides that, the cost of the precision-machined inserts was really high so the project risked delay and cancellation.
JS Precision's Comprehensive Solution
1.Revised Metal Insert Design:
Our DFM team suggested that instead of fully machined pins, they should be made by a hybrid process of partial cold heading + high precision turning at the tail. Cold heading drastically enhances the production efficiency while still maintaining pin coaxiality. Besides, it cuts down the unit procurement cost of metal inserts by 22% and still the tensile strength is not compromised.
2.Two-way hydraulic locating pin mold structure:
We left behind the old method of the passive cavity nesting and with the use of hydraulics, we have come up with the dynamic hydraulically driven carbide locating pin. For the first 70% of the injection filling, the hydraulic pin locks the suspended section of the stainless steel pin, when the melt fills 70% of the cavity and the pressure reaches the equilibrium boundary, the hydraulic pin retracts rapidly within microseconds, so allowing the remaining plastic to perfectly surround the insert.
3.Pressure holding curve control optimization:
With scientifically adjusting the sequence of the two-stage pressure holding operation, we managed to effectively avoid the formation of micro-cracks at the insert root. Initially, the pressure was kept generously high for rapid filling but later on, when the holding stage was reached, the pressure was lowered to a minimum level to achieve slow holding.
Experience and exclusive problem-solving tips
We found in our study that traditional locating devices with mechanical spring are vulnerable to thermal fatigue when the machine runs continuously at a high temperature which can make the positioning less accurate.
Solely Troubleshooting Tips: If you want to maintain the accuracy for the insert injection molding at high load conditions for a long time then you must go for a hydraulic forced limiting structural with separately water cooling and pressure feedback to avoid drift in accuracy due to thermal fatigue. That is a very valuable exclusive practical experience that only mass production from the front line can supply.
Final Outcomes
By quite a few rounds of DFM optimization and upgrading the mold structure, the deviation of the inserted eccentricity wasaccurately kept within 0.015mm that ended up with totally free of mold rework costs, drastically cutting down cost per unit and the project was finally completed and delivered in time two weeks ahead of schedule.
Customer's Reaction
The customer procurement director highly recognizes us: "JS Precision has solid frontline production experience, accurately solving our core project problems and is a trusted professional manufacturing partner."
<块引用>
Facing challenges in mass production of precision automotive inserts, or repeated mold trial failures? We leverage our mature insert molding interface bonding technology to precisely solve insert misalignment and high scrap rates. Contact us for customized DFM optimization solutions and rapid mass production implementation.
Why Choose JS Precision as Your Premium Partner for Precision Insert Molding Service in China?
Excellent precision insert molding service that is highly reliable top the list as the key factor for the success of very complex projects involving injection molding. JS Precision has been disposing of its 0.005 mm ultra-precision inspection instruments and transparent cost accounting system to successfully make technical and procurement decisions for their foreign clients.
Multidisciplinary Manufacturing Skills
Elaborate insert molding brings together the two technologies of precision machining and injection molding. Our precision insert molding service is an integration of those core technologies from both sides, so making up for the technical defects of the single manufacturers.
Pure injection molding factories but have limited knowledge of metal insert tolerance control, and machining factories, for their part, are not very familiar with the characteristics of injection fluids. In JS Precision, we have precision machining and injection molding workshops. This way, we can provide a one-stop solution for all molding challenges.
Stringent Quality Control System
We put into practice theIATF 16949 and ISO 9001:2015 quality management systems, with highly precise testing tools, and we use our insert molding DFM service to perform total quality control during the running of the production process.
Before going out of the factory, all items must be 100% dimensionally checked and functionally tested. This, and a stable insert molding dimension stability process, guarantees that the finished items perfectly comply with our customers' very strict mass production requirements.
Open Cost Accounting System
Based on the actual measurements and the scientifically derived injection molding curves, we offer customers highly detailed reports on the cost structure of insert molding tooling, with clear and transparent cost breakdowns.
We, as a trustworthy precision supplier in China, are opening the way to help our global customers get cost-effective and highly stable one-stop insert injection molding products with the help of our precisely matched insert molding material strategies.
常见问题解答
Q1: What design variables mainly affect the cost of insert injection molds?
Usually, the primary determinants of mold cost are the complexity of the product structure, the number of cavities, and the layout of the slider pins. We optimize and simplify the mold structure through professional DFM (Dual Dimensioning Modeling), which can effectively reduce the overall insert molding tooling cost.
Q2: How does the DFM solution prevent displacement of metal inserts during injection molding?
The key is the combined use of rigid mold restriction and Moldflow melt front filling simulation. Based on our expert insert molding DFM, we can fix the insert positioning tolerance to 0.01mm, because of this completely resolving any deviations.
Q3: How to solve the airtightness failure problem caused by the different coefficients of thermal expansion between metal and plastic?
Using our premium insert molding service, we engineer annular water-stop grooves or interfacial hot melt adhesive in metal inserts, and carry out full inspection with a helium mass spectrometer leak detector to guarantee parts sealing performance.
Q4: Which prototyping process should be used to balance speed and cost during the prototype testing phase?
Prototype insert molding is a good choice during the R&D testing phase. Also, using flexible mold frames and mild steel/aluminum cavities allows a quick lead time for samples of only 10-14 days, so balancing verification efficiency and project cost.
Q5: How do you directly cut the cost of complex parts by using better plastic matrix materials?
We took advantage of our professional insert molding service and, after taking into account the temperature resistance of the product and its need for structural rigidity, we decided to use modified engineering plastics to replace expensive raw materials. As a result, we have not only lowered material costs mostly but also maintained the quality.
Q6: How much can automated insert molding investment be paid off by left over production of inserts?
We have thoroughly discussed and decided to implement automated insert molding for production over 50000 units for the manufacturing of complicated injection molded parts. In this way, we not only stabilize the injection cycle but also prevent mold damage, effectively increase yield, and reduce labor costs.
Q7: In the DFM evaluation stage, how does JS Precision assure the B2B clients overseas that their drawing ownership will be kept confidential?
As a leading insert injection molding services provider, we have entered into a double confidentiality NDA agreement, physically isolated design data internally, and encrypted and traced all operations for the drawings throughout the whole process.
Q8: What is your typical negotiation steps to determine price for prototyping and large quantities production of highly complex insert injection molded part?
Customers can get a quote instantly by just uploading their drawings, submitting STEP format 3D files, and letting us know their purchase quantity. Within 24 hours, we deliver a turnkey solution, and within 3 days of cooperation, we present a full set of customized DFM optimization solutions.
摘要
High-difficulty insert injection molding system engineering. It is precision mechanics, polymer fluids dynamics, high grade mold design integrated engineering projects. Using professional insert molding DFM services, can optimize the wall thickness structure, insert localization, conformal cooling, tolerance matching, can avoid 80% of the risks in designing, to increase the rate of successful into machines before mass production and reduce unit production cost by more than 30%.
Don't keep throwing R&D dollars and trading lead-times away buying trial molds from unskilled suppliers because of excessive flash and insert rotation issues. Hand over your project to experts that know tolerances, materials and injection fluid movement.
[Click here now to upload your 3D CAD drawings] to gainyour free personally tailored insert injection molding DFM evaluation report and accurate special commercial quotation, built for you by JS Precision senior content operation business and technical expert team within 24 hours!
免责声明
The contents of this page are for informational purposes only.JS Precision Services,there are no representations or warranties, express or implied, as to the accuracy, completeness or validity of the information. It should not be inferred that a third-party supplier or manufacturer will provide performance parameters, geometric tolerances, specific design characteristics, material quality and type or workmanship through the JS Precision Network. It's the buyer's responsibility Require parts quotation Identify specific requirements for these sections.Please contact us for more information.
Our factory is equipped with over 100 state-of-the-art 5-axis machining centers, ISO 9001:2015 certified.我们为全球150多个国家的客户提供快速、高效、高质量的制造解决方案。无论是小批量生产还是大规模定制，我们都能以最快的24小时内交货满足您的需求。 Choose JS Precision this means selection efficiency, quality and professionalism. To learn more, visit our website:www.cncprotolabs.com
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