Plastic Injection Molding Suppliers

Equipment Configuration: Evaluate the type of injection molding machine (e.g., blow molding machine, extruder, etc.), the tonnage range (e.g., 35 tons-1200 tons), and whether the company has diversified equipment to meet the demand for the production of parts of different specifications.
Technology Level: whether the company adopts advanced injection molding technology, such as multi-material injection molding, two-color injection molding, or hot runner technology.
Mold Manufacturing Capacity: whether it has strong mold design and manufacturing capacity, whether it has mold flow analysis, mold optimization, and other technical support.
Degree of Automation: whether there are automated production lines, robot handling, and other equipment to improve production efficiency and reduce labor costs.

Product Quality Management

Quality Certification: whether to obtain international quality certification such as ISO 9001, and other related certifications (such as TS16949, environmental certification, etc.).
Quality Control Process: whether there is a strict quality management system from raw material purchasing to production, inspection, shipment, etc., and whether test reports or test data (e.g., IQC, IPQC, FQC, etc.) will be provided during the processing period.
Testing Capability: whether equipped with sophisticated testing equipment (e.g. CMM, spectrometer, hardness tester, etc.) for product quality testing and performance testing.
Rejection Rate: Whether there is a good production process control to reduce the rate of defective products and ensure the consistency and reliability of the products.

Production and Delivery Capacity

Production Cycle: Analyze the company's cycle time from product design to production delivery, and whether it can respond quickly to customer needs. For example, whether it can provide prototype samples in a short period and quickly switch to mass production.
Production Flexibility: Whether the company can flexibly adjust its production schedule according to changes in order volume and handle complex or urgent orders. For example, the customer suddenly increases a batch of orders, but the shipment time remains unchanged can cope with the situation.
Production Scale: Whether the scale of the production facilities is sufficient for mass production and whether it can handle large orders. You can inspect the company to confirm whether the process is complete and whether the equipment is perfect.
On-time Delivery: whether the company has reliable supply chain management to ensure on-time delivery and avoid delays. For example, whether the partner company will report regularly on the progress of product processing and the production plan for subsequent products.

Service Capability

Customized Solutions: Whether the company can provide tailor-made solutions according to the specific needs of customers, covering the whole process from product design, and mold development to production.
Customer Support and Communication: whether the company provides perfect pre-sales, sales, and after-sales service.For example, Whether there is a professional customer service team able to deal with customers' technical inquiries and complaints promptly.
Technical Support: Whether the company can provide customers with technical advice, process optimization, and material selection services to help customers improve product performance and reduce costs.

Cost Control and Pricing Strategy

Cost Control Ability: the company's ability to control costs in terms of material procurement, production efficiency, energy consumption, etc., and whether it can offer competitive pricing. For example, how much time is needed to build a brand new mold and how much price can be observed comparatively.
Pricing Transparency: Whether the company provides transparent and reasonable pricing to avoid hidden costs and win customers' trust. For example, you can check whether there are overcharging or unclear charges in the content of the quotation.
Price Competitiveness: how is the price level in the same industry, and whether it can provide customers with cost-effective products?

Industry Coverage: whether the company covers multiple industries, such as automotive, medical, consumer goods, electronics, etc., and whether it can adapt to diversified customer needs. For example, you can check to see what industries the customers who often cooperate with you belong to. You can learn whether they have experience in processing the industry.
Customer Base: whether it has a stable customer base, whether it cooperates with large brands or industry leaders, and what are the customer evaluations.
Market Share and Competitiveness: What is the share of the market in which it operates, and what are the advantages compared with competitors? For example, to check whether the appearance, quality, or craftsmanship of the specific products they make are different from their competitors out there.

Appearance quality

Dimensional accuracy

Dimensional Consistency: Use calipers or other measuring tools to measure key dimensions of the product to check whether they meet the requirements of the design drawings.
Tolerance Control: Whether the tolerance range of the product is within the allowable error range and whether it meets the design standard.
Shape Error: Check whether the shape of the product is consistent with the mold design and whether there is any deformation or distortion.

physical property

Strength and Toughness: Evaluate the strength, impact resistance, and toughness of the product to ensure its reliability in actual use.
Hardness: Judge whether the hardness of the product material meets the requirements through a hardness test.
Temperature Resistance and Corrosion Resistance: Check whether the product can withstand the temperature or corrosive substances in the use environment to ensure its long-term stability.

Mold marks

Flow Marks (runner marks): Check whether there are obvious flow marks or marks caused by uneven cooling on the product surface.
Gating and Injection Points: Whether the product's gating and injection points are smooth or not, whether there are any traces of gating or bad injection points (such as dissolved wires, air holes, etc.).

Functional Testing

Assemblability: Check whether multiple parts can be assembled accurately and correctly to ensure that the product meets the design requirements.
Mechanical Performance: Perform load tests on products that need to be carried or stressed to ensure their stability and durability in use.
Electrical Performance (if applicable): For injection molded parts involving electricity, check for electrical performance defects (e.g., problems with insulation, conductivity, etc.).

Material Selection

Material Consistency: Ensure that the plastic materials used comply with standards and are consistent across batches.
Material Compliance: Check that materials comply with relevant industry standards, such as FDA certification (for food contact products), UL certification (for electrical products), etc.

Mold Life and Consistency

Mold Maintenance and Life: whether the service life of the mold is in line with expectations, and whether mold problems occur frequently in the production process.
Production Stability: Whether it can maintain long-term stable production and reduce the occurrence of defective products.