Injection Molded Plastic Automotive Parts Mold
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- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Product Introduction

SJ Automotive Business
SJ Group has been devoting herself to automotive molds since 1987, with mold technique center, project management control, high-precision manufacturing center, high-precision measuring center. SJ Group offers comprehensive services including product development, project management,technique support, mold design & manufacturing, quality control and After-sales service, to Tier 1 suppliers and companies across the world!
More than 800 automotive molds will be exported overseas every year,serving many car brands: BMW, Mercedes, Audi, Porsche, Toyota, Land Rover, Nissan, etc.
Mold types cover big molds, muti-cavity molds, stack molds, 2K molds, Tandem molds, Gear molds, etc.
Products are like
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Customized Solutions for Automotive Industries: Our product offers customized plastic auto parts manufactured according to customer specifications, ensuring a perfect fit for various automotive applications.
High-Quality Materials: We use a wide range of materials, including ABS, PA66, PP, PC, PMMA, PSU, PCTG, TPE, TPU, and PBT, to meet the diverse needs of our clients.
Interiors: electronic parts, housing, venting parts, door trims,door handles, speakers, seat syetem
Exteriors: Bumpers, Backdoor handle, A pillar
Function parts: water tank, Powertrain, connectors
Lighting: back mirror, lighting housings ….
Advanced Manufacturing Technology: Our injection molding process, with options for hot runner and cold runner systems, allows for efficient production and high-quality finishes.
Comprehensive Services: We provide one-stop services, including mold design, mold making, injection molding, cutting, and trimming, to streamline the production process for our clients.
Certified and Reliable Partner: Establish ISO13485, ISO9001 and IATF16949 Quality system standard, ensuring that our products meet international quality standards and providing a reliable partnership for our clients, like you.
Injection-Mold-Structure
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Customized services

Mold design:
Product design optimization
Product anti deformation analysis
2D/3D pattern design
DFM/MF analysis

Mold production:
Covering mold size range of 50KG-25T

Mold types:
two-color mold, laminated mold/T mold, encapsulated mold
Multi hole molds, automatic thread removal molds, etc

Plastic injection molding:
89 injection molding machines, with a tonnage of 50KG-3000T
Clean room production
Operating 24/7
SJ Technical Support
SJ Group has experienced technical service personnel to provide comprehensive technical support for our customers. Including part design, DFM, mold flow analysis, reverse engineering, make prototypes for testing, and on-site technology guidance at customer's plants. All the engineers of the team are from the mold and injection molding industry. They are proficient in mold design, mold flow analysis, process flow and on-site molding process. They can also participate in part design of customer at the early stage. Presenting suggestions and feasible solution according to the previous successful experiences. After years of development and experience accumulation, SJ Group has advanced experience in mold manufacturing and injection molding. We are committed to providing quality and efficient services with customers.
Service Process
Pre-Sale Service -Strong Technical Support
Project Start
DFM/ MF Pre-deformation Analysis
In-Sale Service -Verified PM Process
Mold Design
PO Review Schedule Confirm 2D/3D Design
Manufacture
Mold Machining Plan Weekly Progress Report Quality Control During Manufacturing
First Trail
Mold Trial & Samples Delivery Trail Report & Dimension Inspection Report T1 Review Meeting
Engineering Change / Small-batch Production
Mold Inspection and Improvement T2 Schedule Arrangement Part Approved Sheet
Mold Delivery / Mass Production
Final Inspection/ Spare Parts Mold Manual IQC, IPQC,FQC, OQC
After-Sale Service -Globally after-sale service site
After-sales
Video Conference Visit Customers Plant US & Europe Mold Shops

Frequently Asked Questions
Customized Solutions for
1. What kind of product service do you provide?
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We are focusing on the plastic injection molds in Automotive, Packaging, Medical and LSR. From product design to tooling manufacture and mass production.
2.What do I need to provide?
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We need 2D product drawings &3D files or specific samples, detailed product requirements, test requirements, etc.
3. How about the machinery and equipment in your company?
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Our factory is equipped with top-class international machines, such as Agiecharmilles, Mikron, YASDA.etc., which means we can offer high quality molds.
4. What kind of certificates do you have?
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Factory is ISO9001, ISO13485 and TS16949 certified. And have 2 medical class ISO8 cleaning room and GMP work shop.
5. Where does your company have after-sales service?
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We have a subsidiary in Germany, And have Aftersales Sites in USA, Mexico, Brazil, Poland, Crech Republic, Slovakia, UK and France.
6. What is your lead time to make small mould and big mould?
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Generally speaking, for 100-300Kg mold, without concern the mold complexity, only need 6 weeks. 300-500Kg (8 weeks) , 500-1000 Kg (9 weeks), 1000-160(12 weeks). 0ver 1600Kg (14 weeks)
7.What payment methods do you accept?
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Basically, our company adopts 40%-30%-30% payment terms.
8. What is your company's warranty policy and returns procedure?
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Free of charge for replacement if it is our fault. Customer can return product back, or supply evidence about the problem, then we will do repair or replacement for customer.
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