Square Thick-Wall Cosmetic Jar Injection Mold – 1*4 Hot Runner System, S136 Steel, 300K Shots, Mirror Polish, CNC & EDM Precision, IATF 16949
Product Spotlights
At Changzhou Hongxinyutai Precision Mold Co., Ltd., we specialize in delivering high-quality injection molds tailored for demanding cosmetic packaging applications. Our Square Thick-Wall Cosmetic Jar Injection Mold featuring a 1*4 hot runner system, S136 steel, and mirror polish finish is engineered to produce consistent, defect-free jars with crystal-clear surface aesthetics. Designed for a minimum of 300,000 shots, this mold combines CNC and EDM precision with IATF 16949 quality management standards, ensuring reliable performance and long service life. Whether you are launching a new luxury skincare line or upgrading existing tooling, this mold offers a robust, cost-effective solution.
Key Features & Technical Specifications
- Hot Runner System: 1*4 configuration reduces material waste, shortens cycle time, and ensures uniform cavity filling for thick-wall square jars.
- S136 Steel Construction: High hardness (HRC 48–52), excellent corrosion resistance, and superior polishability – ideal for cosmetic-grade molds.
- Mirror Polish Surface: Achieves SPI A1 (mirror) finish with Ra ≤ 0.05μm, producing glossy, transparent or translucent jar surfaces without flow marks.
- CNC & EDM Precision: Multi-axis CNC machining and wire-cut EDM guarantee tight tolerances (±0.01mm) and complex geometric features.
- 300,000 Shots Life: Engineered for long-term production cycles; optional heat treatment and hard chrome plating further extend durability.
- IATF 16949 Certified: Our manufacturing process follows automotive-grade quality standards, ensuring consistent output and traceability.
Technical Parameters
| Parameter | Value |
|---|---|
| Mold Type | Square Thick-Wall Cosmetic Jar – Injection Mold |
| Cavity Configuration | 1-4 (1×4 Hot Runner) |
| Steel Grade | S136 (Stavax ESR equivalent) |
| Hardness (Pre-HT) | HRC 48–52 |
| Surface Finish | Mirror Polish – SPI A1 (Ra ≤ 0.05μm) |
| Expected Service Life | ≥300,000 Shots |
| Precision Tolerance | ±0.01mm (CNC + EDM) |
| Quality Standard | IATF 16949 |
| Cooling System | Conformal cooling channels (optional) |
Why This Mold Stands Out for Cosmetic Packaging
The thick-wall square jar design is increasingly popular for premium creams, serums, and balms. Our mold is optimized to handle the specific challenges of thick-wall molding:
- Uniform Wall Thickness: The hot runner system with six-point valve gating (customizable) prevents sink marks and ensures even material distribution.
- Fast Cycle Time: Efficient cooling layout reduces cycle time by up to 15% compared to conventional molds, increasing productivity.
- Low Maintenance: S136 steel resists rust and wear; mirror polish reduces ejection force and prevents sticking – less downtime.
- Flexible Gate Options: Hot tip or valve gate available; can be adapted for various resins (PP, PETG, Acrylic, SAN).
Trust & Reliability from Changzhou Hongxinyutai
Founded in 2017, our factory spans 1,000–3,000 square meters with a dedicated team of 51–100 employees. We have exported molds to North America, Europe, Southeast Asia, the Middle East, South America, Africa, and Oceania. All our tools are manufactured under the IATF 16949 quality system, ensuring every cavity meets rigorous dimensional and aesthetic requirements. We also offer mold trials, sample approval, and after-sales support. With a track record of over 300 successfully delivered molds, we invite you to partner with us for your next cosmetic tooling project.
Frequently Asked Questions (FAQ)
Q1: What is the minimum order quantity for this mold?
A: The mold itself is a single unit. We accept custom orders starting from 1 set. Production mold trial runs are included.
Q2: Can the mold be adapted for different jar sizes?
A: Yes, the cavity and core can be redesigned for custom dimensions (e.g., diameter, height, thread type). We offer full customization.
Q3: What material is recommended for achieving a glossy transparent finish?
A: For mirror surfaces, we recommend using PETG or GPPS with high flow. The S136 steel with SPI A1 polish ensures clarity.
Q4: How long does it take to manufacture this mold?
A: Standard lead time is approximately 25–35 working days, depending on complexity and current workload. Rush service is available on request.
Q5: Do you provide mold trial samples before shipping?
A: Yes, we provide free trial shots (up to 200 pieces) for customer approval. Samples can be shipped worldwide.
Q6: Is the 300,000 shot life guaranteed?
A: The mold is engineered for 300,000+ shots under normal production conditions. Regular maintenance can extend its life further. We provide a 1-year warranty against manufacturing defects.
Q7: What certification does your factory hold?
A: Our factory is IATF 16949 certified (since 2020), which aligns with automotive-grade quality management. We also comply with ISO 9001 for general quality.
Q8: Can you integrate an unscrewing mechanism for threaded jars?
A: Yes, we offer optional unscrewing cores for screw-on caps. Please specify your closure design when inquiring.
Get in touch with us today for a competitive quotation and technical discussion. We look forward to helping you achieve flawless cosmetic jars with reliable tooling.
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