Plastic Injection Moulding  Manufacturers, Traders, Suppliers

• Permanent Magnets
• Electro Magnets
• Linear Solenoids
• Holding Solenoids
• Separation Systems

MaterialsThermo stabilized, UV resistant - PE; PP; PA6; PA6.6simple and reinforced with glass fibre or minerals; ABS; PUR.Technology
Multicavity injection moulds, with or without hot runner, thermostatic moulds,

• Choice of material (TPU, PA, POM, ABS, PE, etc.): It all depends on the chemical and physical conditions to which the parts are exposed. With our own toolmaking, mouldmaking and design departments, we can offer you a full service.
• Numerous potential applications: Our ester and ether materials are very hardwearing and flexible and are used in applications with the toughest mechanical demands, e.g. sowing and sifting systems.
• Two components: A glass fibre-reinforced material plus a soft inner coating result in products that can be used as loadbearing parts, for example. Such parts would be inconceivable without precise planning plus development and test phases.
• Test samples: Before ordering an injection mould, we often produce samples for approval using laser sintering or 3D printing to avoid the need to invest in a mould at this stage. Our machines can produce injection-moulded parts weighing between 5 and 6000 g.

In our fully automated injection moulding production we work with roboter handling systems. Our machines are equipped with clamping force of 30 -1100 tons.
We produce injection moulded parts out of all thermoplastics. (1 component, 2 component and multi component injection moulding)

We are positioned independent of industry and supply all industries that require plastic parts. The household appliance industry currently has the largest share in the injection moulding sector, followed by the filter and water technology sector, the power tool industry, the medical sector, the chair industry, the lighting industry, the automotive industry and many countless other sectors.

• More saving on manufacturing cost.
• State-of-the-art manufacturing facilities.
• On site manufacturing supervision for quality control.
• Bilingual engineers reporting on your project.
• Reasonable short lead time.

Injection molding process mainly includes 6 stages--Mold Closing--Filling(gas-assisted, water-assisted)--Pressure Holding--Cooling--Mold Opening--Demolding. With the help of screw thrust(or plunger), the raw material is heated and melted, then plastic in a flowing state is injected into the closed mold core. Driven by the screw or plunger of the injection machine, it enters the mold cavity through the nozzle and the gating system of the mold, finally the product is obtained after drying and fixing.

Locking and closing the mold: the mold puller quickly approaches the fixed mold pulley. When it is confirmed that there is no dirt, the system turns to high pressure to lock the sample.
Shooting platform moves forward: The shooting platform moves forward to the designated position.
Plastic injection molding: The screw of the extruder can be set at two stages of speed, working pressure and stroke arrangement, to introduce the molten material developed at the front end of the barrel into the cavity.
Cooling and holding pressure: According to the set pressure and time range, the pressure of the barrel is maintained, and then mold core is cooled and formed.
Cooling and premolding: the product in the mold cavity is cooled again. In addition, the hydraulic drive motor drives the extruder screw to rotate to push the plastic material forward. The extruder screw reverses under the set condensing control. When the screw of the extruder returns to the predetermined position, the screw of the extruder stops rotating, and the injection hydraulic cylinder is released according to the setting, and the injection is completed.
Injection platform back: After pre-molding is completed, the injection platform backs up to the designated position.
Mold opening: the mold puller moves back to the origin.
Demoulding: Mold thimble injection product.

Camera Spare parts, Motorcycle Accessories, Robot, Flight or marine Facility, Relevant Automatic Equipment etc.

Automotive parts
Cosmetic bottles and cap
plastic gear
electronic boxes
keyboards
home appliance
Coffee machine
Inudstrial parts

Processing : Plastic injection molding
Mold steel : STAVAX S136 , 1.2343 , 1.2312 , 738H ,
Hardness : 36HRC - 54HRC
Mold component : Hasco , Meusburger , Rabourdin , LKM

Injection Molded Parts are components produced by injecting molten plastic material into a precision mold, allowing it to cool and solidify, and then ejecting the finished part from the mold. This process is widely used for manufacturing high-precision, complex-shaped plastic components with consistent quality, especially suitable for mass production.
Key characteristics include:

• High Precision: Capable of achieving tight tolerances (e.g., ±0.01mm for precision molds).
• Design Flexibility: Enables intricate details, thin walls, and integrated features (screws, clips, ribs).
• Material Versatility: Compatible with thermoplastics (e.g., ABS, PC, PP) and thermosets (e.g., epoxy, phenolic).
• Cost Efficiency: Low per-unit cost for high-volume production, despite high initial mold investment.

1. Injection Molding Processes

• General Injection Molding:

• Standard process for most plastic parts, using single-cavity or multi-cavity molds (e.g., household appliances, automotive components).

Precision Injection Molding:

• Strict control over temperature, pressure, and cooling to achieve tight tolerances (e.g., medical devices, optical lenses).

Overmolding/Insert Molding:

• Molding plastic around inserts (metal, glass, or another plastic) to create composite parts (e.g., handles with metal cores, electrical connectors).

Two-Shot/Multi-Color Molding:

• Uses rotating molds to inject multiple materials or colors in a single cycle (e.g., mobile phone cases, automotive interior trims).

Gas-Assisted Injection Molding:

• Injecting gas into the molten plastic to reduce weight and internal stresses (e.g., automotive door panels, large housings).

2. Materials

• Thermoplastics:

• Commodity Plastics: PE, PP, PS – low cost, widely used for consumer goods.
• Engineering Plastics: ABS, PC, PA – higher strength, heat resistance (e.g., electronics, automotive).
• High-Performance Plastics: PEEK, PTFE, PSU – for extreme environments (medical, aerospace).

Thermosets:

• Epoxy, Phenolic – rigid, heat-resistant, non-recyclable (e.g., electrical insulators, circuit boards).

3. Design Considerations

• Wall Thickness: Uniform thickness (typically 0.5–4mm) to avoid sink marks and ensure proper cooling; thin walls for lightweighting.
• Gate Design: Location and type (edge, point, hot runner) affect material flow and part quality.
• Draft Angle: 1–3° on vertical surfaces to facilitate mold ejection and prevent surface scratches.
• Ribs and Bosses: Reinforce structural strength without increasing wall thickness.
• Shrinkage: Material-dependent (e.g., PE shrinks ~2%, PC ~0.5%) – critical for mold dimension calculations.

4. Mold Design & Engineering

• Mold Materials: Stainless steel (corrosion resistance), tool steel (high hardness for long life).
• Cooling System: Channels in the mold to control solidification rate and reduce cycle time.
• Ejection System: Pins or plates to remove parts from the mold without damage.
• Flow Analysis: CAE tools (e.g., Moldflow) to simulate plastic flow and optimize design.

5. Quality Control

• Dimensional Inspection: CMM, calipers, gauges to check tolerances.
• Surface Defects: Visual inspection for sink marks, warpage, flash, or color inconsistencies.
• Mechanical Testing: Tensile strength, impact resistance, hardness (Shore/ASTM tests).
• Material Compliance: RoHS, FDA (for medical), or UL (for electrical safety) certifications.

1. Consumer Electronics

• Device housings: Smartphones, laptops, tablets (PC/ABS for strength and aesthetics).
• Components: Keyboard keys, camera lenses, USB connectors (precision molding for tight tolerances).
• Accessories: Headphone cases, wearable device frames (overmolding for soft-touch finishes).

2. Automotive Industry

• Interior parts: Dashboard panels, door trims, center consoles (PP/ABS for cost and durability).
• Exterior components: Bumpers, side mirrors (PC/ASA for weather resistance).
• Functional parts: Fuel injection components, sensor housings (PA/PEEK for heat resistance).

3. Medical & Healthcare

• Disposable devices: Syringes, IV connectors, test tubes (PP/PS for biocompatibility, ISO 10993 compliance).
• Implants: Temporary prosthetics, orthopedic components (PEEK for radiolucency and strength).
• Diagnostic equipment: Microfluidic chips, labware (precision molding for complex fluid channels).

4. Packaging Industry

• Bottles and containers: PET for beverages, HDPE for detergents (injection blow molding).
• Caps and closures: Child-resistant lids, tamper-evident seals (PP for flexibility).
• Custom packaging: Cosmetic jars, food trays (thermoforming often paired with injection molding for inserts).

5. Industrial Equipment

• Mechanical parts: Gears, pulleys, bearings (PA/POM for low friction and wear resistance).
• Electrical components: Insulators, terminal blocks (thermosets for fire resistance).
• Tooling: Jigs, fixtures, and prototypes (3D-printed molds for low-volume production).

6. Aerospace & Aviation

• Lightweight components: Interior panels, ducting systems (PEI/PMI for high strength-to-weight ratio).
• Avionics: Circuit board housings, connectors (PSU for flame retardancy).

7. Toys & Recreation

• Toy parts: Action figures, building blocks (ABS/PP for safety and impact resistance).
• Sports equipment: Helmets (PC for impact resistance), golf club grips (TPU for grip texture).

Material: PP, ABS, PC, ABS+PC, Nylon, delrin (POM), PMMA, AS, PS, PE, PET, PVC, PEEK, etc; GF added material (ABS+GF, PA66+GF, PA666+GF); Rubber like material (TPE, PU, NBR, silicone, NBR+TPE etc)
Special specification available depend on different material and requirement: scracth resistant, flame resistant, UV resistant, food grade, chemical resistant, etc.
Sizes: All size and thickness available.
Process: Injection molding, overmolding.
Surface finish: texture (VDI/MT standard, or made to client's sample), polished (high polish, mirror polish), smooth, painting, powder coating etc.
Colors: clear (standard clear or high optical clear), semi-transparent, other colors (pantone code #, or made to client's sample).
Application: household commodities, electronics, car parts OME & Performance, motorcycles, bikes, machinery parts, hospital, cosmetics, Military and Aerospace etc.

SHJIA production is in full accordance with the IS09001 standard.The company introduced advanced processing and testing equipment and quality management systems to control every aspect from design to prduction and acceptance.The ultimate customer satisfaction is on SHIJIA's consistent quality.After mold design,we record the CAD,data,and then start making the mold. We are using the CMM equipment and electronic measuring instument for inspection.All in strict accordancewith standard quality control procedures by SHIJIA's experienced staff to ensure that the products meet every detailed requiirements from customers.

Application: household commodities, electronics, car parts OME & Performance, motorcycles, bikes, machinery parts, hospital, cosmetics, Military and Aerospace etc.

The core advantages of plastic injection molding lie in high mass production efficiency, stable precision, and controllable costs. Suitable for large-scale production, it meets the needs of complex structures and diverse performance requirements, making it the preferred process for mass manufacturing of plastic products.

Specific Advantages

Plastic injection molding products are widely used across industries, including automotive manufacturing, consumer electronics, home appliances and furniture, medical and healthcare, packaging containers, industrial machinery, building materials, and maternal and infant toys, meeting the demand for high-volume, high-precision plastic parts.Core Application Industries and Typical Products

>Precision Molding: Meeting your requirements for dimensional accuracy and aesthetic appearance.
>Variety of Materials: Expertise in PC, PA, PP, ABS, POM, PE, PMMA, TPE, TPU, PPS, PEEK, and more.
>Custom Solutions: Customized designs to address specific customer needs, from prototypes to mass production.
>Experienced Team: 15+ years of expertise in plastic molding, utilizing advanced machinery to ensure consistent quality.
>Cost-Effective: Providing affordable solutions without compromising quality, delivering great value.
>Global Shipping: Fast delivery through DHL, FedEx, UPS, rail, or sea.

Plastic injection moulding for custom precision parts and assemblies.

• Dimensional Tolerance (Moulded Parts): Up to ±0.05 mm
• Tooling Accuracy: Up to ±0.01 mm
• Manufacturing Equipment: High-precision CNC milling, mirror-finish EDM, slow-speed EDM wire cutting
• Surface Textures: According to SPI, VDI 3400 or MT specifications; custom textures via laser engraving
• Production Volume: From prototypes to fully automated high-volume series

Automotive | Consumer Electronics | Home Appliances | Industrial Equipment | Medical & Healthcare | Packaging | Household & Lifestyle Products

Injection molding products are plastic products made by heating and melting plastic in an injection molding machine, injecting it into the mold cavity, and then cooling and solidifying it before demoulding. The core process includes four steps: heating and melting the plastic, high-pressure injection into the mold, cooling and shaping, and demoulding. The entire process relies on the precise coordination between the injection molding machine and the mold.

Too high a barrel temperature can easily cause burning, while too low a temperature can lead to glue shortage. The mold temperature affects the cooling rate and needs to be adjusted according to the type of plastic (for example, crystalline plastics require a higher mold temperature). Increasing the injection pressure can solve the glue shortage problem, but too high a pressure will cause burrs. Extending the holding time can reduce shrinkage holes.

Energy industry; aerospace industry; electronics industry; construction industry; transportation industry; medical industry; environmental protection insudtry; applications of tantalum and its alloys

Injection molded parts are plastic products manufactured by the injection molding process.In this process, plastic material is melted and injected under high pressure into precisely manufactured mold cavities.After cooling and solidification, the desired plastic part is created.Injection molded parts are used in industries such as automotive, electronics, consumer goods and medical technology.
Injection molded parts offer numerous notable advantages.Firstly, the injection molding process enables the production of dimensionally accurate and complex shaped plastic parts that meet the precision and complexity requirements of modern industry.Secondly, the process helps to increase production efficiency.By optimizing process parameters and equipment configurations, high production speeds can be achieved and production cycles shortened, which increases efficiency.the process also offers excellent material utilization.injecting the molten plastic into the mould under high pressure allows the mould cavity to be completely filled, minimizing material waste and reducing production costs.Furthermore, the injection molding process offers high flexibility in terms of materials used.It is compatible with a wide range of plastic materials, including thermoplastics and thermosets, enabling a wide range of applications.At the same time, the process is characterized by excellent repeatability and consistency.Consistent product quality can be ensured during series production, so that each part meets the specified standards in terms of performance and appearance.Finally, the injection molding process supports various finishing processes such as painting, printing and assembly, which further enriches the functionality and design of the products.

Plastic injection molding is a manufacturing process in which molten plastic is injected into a mold and cooled there to produce a component. This process is used in numerous areas. In the automotive industry, plastic injection molding is used to produce various components such as dashboards, door panels and bumpers, with the lightweight and flexible design improving the fuel efficiency and aesthetics of vehicles. In the electronics industry, plastic injection molding is used to produce cell phone casings, computer accessories and other products to ensure their durability and functionality. Plastic injection molding is also frequently used in the medical sector, for example to produce disposable syringes, medicine packaging and other applications to ensure hygiene and safety. Plastic injection molding is also widely used in household appliances, toys and the packaging industry to meet modern requirements for diverse and high-quality products.