World-Class Injection Molding Services
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Injection Molding
Star Rapid is a world-class provider of advanced injection molding services. We offer a complete manufacturing solution that covers every aspect of positive material identification, tool making, part fabrication, finishing, and final inspection. Our international team of manufacturing experts is committed to providing you with the highest level of professional support for injection molding services of any size or complexity. We offer three tiers of injection molding services to ensure that you get precisely the solution that’s best for your intended volume, production time and budget.
Advantages of Compression Molding
Compression molding offers significant cost savings compared to rubber transfer molding and LSR injection molding. Its simplicity and efficiency make it a low-cost option suitable for both low and high-volume production.
With short setup times, compression molding enables rapid production transitions, allowing for quick changes in material hardness and colors. This flexibility ensures efficient operations and swift adaptation to varying production needs.
Compression molding stands out as the exclusive method for crafting silicone products with stunning marble colors. This distinctive capability adds aesthetic appeal and sets products apart in the market, enhancing their visual appeal and desirability.
Through the use of high-quality steel materials, precisely located pins, and advanced mold-making equipment, compression molding achieves exceptional precision and consistency in part tolerance, with control as fine as 0.02-0.1mm. This ensures that every product meets stringent quality standards, minimizing defects and maximizing customer satisfaction.
Compression molding offers a wide range of material options, making it suitable for various applications. From common silicone to specialized grades such as food-grade silicone and medical-grade silicone, as well as natural rubber, EPDM, Neoprene Rubber, and Nitrile Rubber, the versatility of compression molding enables the production of parts with diverse properties and functionalities. This breadth of material choices ensures compatibility with specific application requirements, expanding the scope of potential uses for compression-molded products.
Compression Molding Materials
In compression molding, thermosetting plastics, rubber, and composite materials are commonly used due to their ability to undergo a curing process and achieve a stable, rigid form. The selection of materials depends on the desired characteristics of the final molded products.
Rubber Materials
- Silicone
- EPDM (Ethylene Propylene Diene Monomer)
- Nitrile (NBR)
- Neoprene (CR)
- SBR (Styrene Butadiene Rubber)
- Natural Rubber (NR)
- Butyl Rubber (IIR))
Plastic Materials
- Nylon
- PP
- HDPE
- UHMWPE
Injection Mold Surface Finishes
We primarily offers SPI finishes for plastic injection molds. For VDI textures, specify your requirements when submitting your quote on our platform.
| SPI Finish Standards | Surface Roughness RA (mm) | Finishing Method | Texture | Steels Recommended |
| SPI A1 | 0.012 to 0.025 | 6000 Grit Diamond | Super High Glossy finish | S136 (54HRC) or 8407(52HRC) |
| SPI A2 | 0.012 to 0.025 | 3000 Grit Diamond | High Glossy finish | S136 (54HRC) or 8407(52HRC) |
| SPI A3 | 0.05 to 0.10 | 1200 Grit Diamond | Normal Glossy finish | S136 (300HB) or 718H |
| SPI B1 | 0.05 to 0.10 | 600 Grit Paper | Fine Semi-glossy finish | 718H |
| SPI B2 | 0.10 to 0.15 | 400 Grit Paper | Medium Semi-glossy finish | 718H |
| SPI B3 | 0.28 to 0.32 | 320 Grit Paper | Normal Semi-glossy finish | 718H |
| SPI C1 | 0.35 to 0.40 | 600 Grit Stone | Fine Matte finish | 718H |
| SPI C2 | 0.45 to 0.55 | 400 Grit Stone | Medium Matte finish | 718H |
| SPI C3 | 0.63 to 0.70 | 320 Grit Stone | Normal Matte finish | 718H |
| SPI D1 | 0.80 to 1.00 | Dry Blast Glass Bead | Satin Textured finish | 718H |
| SPI D2 | 1.00 to 2.80 | Dry Blast | Dull Textured finish | 718H |
| SPI D3 | 3.20 to 18.0 | Dry Blast | Rough Textured finish | 718H |
Plastic Parts Surface Treatment
Matte Finish
A matte finish lends an understated elegance, providing a smooth yet non-reflective surface that exudes sophistication. Its subtle texture invites tactile exploration, offering a refined aesthetic suitable for a variety of applications.
Textured Surface
Textured surfaces add depth and visual interest, incorporating intricate patterns or textures that enhance both aesthetics and functionality. From subtle embossing to bold relief, textured surfaces offer tactile appeal and a distinctive look.
Common Polishing
Common polishing delivers a glossy, reflective surface with a smooth finish, enhancing the appearance of molded parts with a high degree of clarity and shine. It showcases the material's inherent beauty while offering durability and resistance to wear.
Mirror Polish
Mirror polishing achieves an impeccable, mirror-like surface finish that reflects precision and attention to detail. With its flawless appearance and exceptional reflectivity, mirror-polished surfaces elevate the aesthetic appeal of molded products to a premium level.
Laser Engraving
Laser engraving enables precise customization and branding, adding intricate designs or text onto the surface of molded parts with exceptional accuracy. This advanced technique offers endless possibilities for personalization and product differentiation.
Powder Coating
Powder coating provides a durable and attractive finish, applying a dry powder electrostatically to the surface of molded parts before curing to form a resilient coating. It offers excellent corrosion resistance and color retention, ideal for enhancing both aesthetics and functionality.
Printing
Printing allows for the application of detailed graphics, logos, or designs onto the surface of molded parts, offering versatile branding and customization options. Whether through screen printing, pad printing, or digital printing, this process adds visual impact and branding consistency.
Segmented Colors
Segmented colors involve the incorporation of multiple color segments into molded parts, creating visually distinct patterns or sections. This technique allows for the precise control of color distribution, enabling the creation of eye-catching designs and functional elements.
Mixed Colors
Mixed colors blend different colored materials during the molding process, resulting in unique color combinations or gradients within molded parts. This versatile technique offers endless possibilities for customization, allowing for the creation of visually striking and dynamic products.
Quality Control（QC）
In the injection moulding production process, quality inspection is a key component to ensure that the product meets the design specifications and quality standards.Xinjuexin quality inspection process involves not only finished product inspection, but also raw material inspection, production process control and final product inspection and other stages.
Raw Material Inspection
Raw Material Quality Inspection: Before production begins, raw materials are inspected to ensure that they meet production requirements. This includes testing the physical and chemical properties of the plastic pellets, such as melting point, flow rate, colour stability, etc.
Supplier Evaluation: Suppliers are evaluated and audited on a regular basis to ensure that the raw materials they provide are of a consistently high quality over time.
Production process control
On-line monitoring and testing: Real-time monitoring of the production process, such as dimensional accuracy, colour consistency, physical properties, etc., is carried out by setting up testing points and using automatic testing equipment.
Process Audit: Regular audits of the production process, including operator practices, maintenance of machinery and equipment, and cleanliness of the production environment.
Final Product Inspection
Dimensional and Appearance Inspection: Conduct dimensional measurements and appearance inspections of completed products to ensure that there are no defects, such as fusion lines, air bubbles, discolouration or deformation.
Functionality Test: Test the functionality of the products to ensure that each product works properly and meets the design requirements..
Durability and Reliability Test: Test the durability and reliability of the products by simulating the conditions of long-term use, such as heat resistance, cold resistance, chemical resistance and mechanical strength.
Packaging and final pre-shipment inspection
Packaging Inspection: Ensure that the products are firmly packaged with appropriate protective measures to prevent damage during transport.
Pre-shipment sampling: Random sampling before final shipment to ensure that the quality of mass-produced products is consistent with the samples.
Compression Molding Process At Xinjuexin
See how RapidDirect processes your orders, from quotation, high-quality injection mold making, to production-grade plastic parts, ensuring timely delivery with our skilled team and machinery.
Customer Confirmation Sample
Successful test samples are sent to the customer for final confirmation to ensure that the product fully meets the customer's expectations.1.Receive product drawings: After the customer sends the product drawings, the product is initially evaluated and quoted. If necessary, we can sign NDA agreement to protect customer's intellectual property rights.
Feasibility assessment and DFM report
A team of engineers will conduct a detailed feasibility assessment of the customer's design and provide a DFM (Design For Manufacturing) report. This is to ensure that the design is realisable prior to production and also to help the customer understand any design adjustments that may be required.
Design the mould drawings and make the moulds
After the DFM report has been approved by the customer, work will begin on designing the mould drawings and making the moulds.
Trial production and testing
After the moulds are made, trial production is carried out and samples are tested to ensure that the dimensions and performance meet the requirements. If the test fails, necessary mould modifications or moulding parameter adjustments will be made, and then the test will be repeated until the sample meets the requirements.
Customer Confirmation Sample
Successful test samples are sent to the customer for final confirmation to ensure that the product fully meets the customer's expectations.
Quality inspection and production
Once the samples have been approved by the customer, raw material procurement and quality inspection begins, followed by the production process of mixing, moulding, trimming, etc., and several quality inspections are carried out during the process to ensure product quality.
Assembly and packaging
After completing the production, the necessary assembly and packaging work is carried out to prepare the product for final shipment.
Shipment Preparation
Once the entire order is ready, a packing list is sent to the customer to assist in arranging shipment.
Why Choose Us
No MOQ
No minimum order reguirement helps move plastic molded partsfrom design to production in a fast turnaround and supports youron-demand injection molding needs with reduced cost.
High Quality and Consistency
Owing lsO certified factories, conducting in-process inspectionsand dimensional verification after production, guarantee thecustom molded parts consistency regardless of the complexshape with high precision.
Fast Turnaround
With certified domestic factories and a strong supply chainsystem, we accelerate the product development cycle andbridge plastic parts production as fast as 2 weeks, or less.
Injection Molding Expertise
Collaborate with our experts, boasting 10+ years in injectionmolding, for mold design guidance, material and finish choices,ensuring a smooth transition from prototyping to production.
FAQS
Star Rapid Injection Molding Service FAQ
These are the common injection molding questions at Star Rapid.