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Help CenterOEM Thick-Wall Cosmetic Jar Injection Service for Cream & Powder Cases – 1x4 Cavity, Hardened S136, Mirror Finish
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At Changzhou Hongxinyutai Precision Mold Co., Ltd. (established 2017), we are dedicated to delivering high-performance injection molding solutions for the cosmetics packaging industry. Our OEM thick-wall cosmetic jar injection service is specifically engineered for cream and powder cases, utilizing a precision 1x4 cavity mold made from hardened S136 stainless steel with a mirror-like finish. This combination ensures exceptional product aesthetics, consistent wall thickness, and extended mold durability.
Thick-wall cosmetic jars pose unique challenges in injection molding – uneven shrinkage, sink marks, and long cycle times can affect quality. Our mold design incorporates optimized gating and conformal cooling to distribute melt evenly and control heat dissipation. With hardened S136 steel, the cavity resists wear and corrosion, maintaining dimensional accuracy over millions of cycles. The mirror finish (SPI A1) eliminates the need for secondary polishing or coating, giving each jar a flawless, high-gloss surface that enhances brand value.
- Hardened S136 Steel: Offers superior corrosion resistance and high hardness – typically 48-52 HRC, ensuring cavity integrity under high injection pressure.
- Mirror Finish: Achieves Ra ≤ 0.05 µm, providing a highly reflective surface that reproduces perfectly on the molded part.
- 1x4 Cavity Configuration: Balances production efficiency and mold cost; each cavity is machined to identical tolerances for part-to-part consistency.
- Thick-Wall Capability: Dedicated simulation and gate design minimize internal stress and voids, even for wall thicknesses up to 5mm or more.
- Material Versatility: Compatible with PP, PET, ABS, acrylic, SAN, and many cosmetic-grade resins.
| Parameter | Specification |
| Mold Material | Hardened S136 (DIN 1.2083) |
| Cavity/Insert Material | Hardened S136 |
| Surface Finish | Mirror Finish (SPI A1, Ra ≤ 0.05 µm) |
| Cavity Count | 1 x 4 |
| Mold Base | Standard or custom (optional) |
| Hardness | Customizable, typically 48-52 HRC |
| Mold Life | Long service life, customizable for your production needs |
| Product Certification | TS16969 |
Our injection service offers several advantages for your cosmetic jar production:
- High Consistency: CNC-machined cavities guarantee that each part matches the design perfectly, shot after shot.
- Reduced Cycle Time: Optimized cooling layout shortens molding cycles, lowering per-part cost.
- Full Customization: We accept your 3D design (STEP/IGS) and produce the mold to exact specifications.
- Reliable Support: From DFM analysis to mold trials and mass production, our engineers guide you at every stage.
With a 1,000-3,000 m² factory and a skilled team of 51-100 employees, Changzhou Hongxinyutai has been serving clients worldwide since 2017. Our TS16969 certification reflects our commitment to quality management in mold manufacturing. We export to North America, Europe, Southeast Asia, Africa, Oceania, and many other regions, ensuring on-time delivery through ports in Jiangsu, Shanghai, and Shenzhen. Our established presence in global markets demonstrates our ability to meet international standards. Contact us today to discuss your thick-wall cosmetic jar project and receive a competitive quotation – we are ready to support your production with precision molds and reliable service.
Frequently Asked Questions
- Q1: What is the typical lead time for a 1x4 cavity mold?
- A: Our standard lead time is 30-45 working days after design approval, depending on complexity. Rush orders may be arranged upon request.
- Q2: Can you provide samples before mass production?
- A: Yes, we can produce trial samples from the mold. Sample fees are negotiable and will be credited back in the final order.
- Q3: What materials can be used with this mold?
- A: This mold is designed for common cosmetic jar materials such as PP, PET, ABS, PMMA (acrylic), and SAN. Our engineers can advise on the best material for your product.
- Q4: How does the mirror finish affect the part's appearance?
- A: The mirror finish (SPI A1) produces a highly glossy, clear surface that eliminates the need for additional painting or coating. It enhances the premium look of cream jars and improves release.
- Q5: Is mold maintenance included in your service?
- A: We provide post-sale support and maintenance services. Our team can guide you on proper cleaning and storage, and we also offer mold repair and refurbishment at reasonable cost.
- Q6: What is the minimum order quantity (MOQ) for this service?
- A: For the mold itself, the MOQ is one set. For production parts, MOQ depends on your quantity requirements; we can discuss flexible options.
- Q7: Do you have a quality management system certification?
- A: Yes, our company is certified under TS16969, which ensures robust quality control processes throughout mold design and manufacturing.
- Q8: How do you ensure the mirror finish is consistent across all cavities?
- A: Each cavity is machined and polished individually to the same specification, using high-precision CNC and EDM processes. We perform coordinate measuring and surface roughness checks on every cavity.
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