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Help CenterOEM Thick-Wall PMMA Jar Injection: 1*4 Cavities, S136 Steel
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As a trusted manufacturer based in Changzhou, Jiangsu, China, Changzhou Hongxinyutai Precision Mold Co., Ltd. specializes in crafting high-performance injection molds for the packaging industry. Our OEM Thick-Wall PMMA Jar Injection Mold with a 1×4 cavity configuration and premium S136 steel construction is designed to meet the rigorous demands of producing transparent, thick-walled acrylic jars. With years of experience in mold making and a factory spanning 1,000–3,000 square meters, we deliver precision molds that ensure superior dimensional accuracy, excellent surface finish, and long-lasting durability. This mold is ideal for manufacturers seeking to produce luxury cosmetic jars, food containers, or display jars with exceptional clarity and strength.
Key Features & Technical Specifications
- Premium S136 Steel Construction: S136 is a high-grade stainless mold steel renowned for its excellent corrosion resistance, high polishability, and toughness. It is specifically chosen for PMMA molding because it withstands the acidic byproducts released during acrylic processing and allows for a mirror-like finish on the jar surface, reducing post-molding polishing work.
- 1×4 Cavity Layout: The four-cavity design balances production efficiency with mold complexity. It offers a 4× output increase over single-cavity molds while maintaining consistent part quality through optimized runner and gate systems. Each cavity is individually cooled to ensure uniform shrinkage and minimize warpage in thick-wall sections.
- Optimized for Thick-Wall PMMA: Thick-wall PMMA parts (typically wall thickness > 3 mm) require careful control of melt temperature, injection speed, and cooling rate to prevent internal voids, stress cracks, or distortion. Our mold design incorporates advanced simulation software to design conformal cooling channels, ensuring even heat dissipation and reducing cycle times by up to 20% compared to conventional designs.
- Customizable Gate & Runner Options: Depending on your jar design and production requirements, we can supply the mold with either a cold runner (for lower initial cost) or a hot runner system (for reduced material waste and faster cycles). Sub-gate or edge gate configurations are available to suit different jar geometries.
- High-Precision Machining: All mold components are manufactured using 5-axis CNC machining and EDM technology, achieving tolerances as tight as ±0.01 mm on critical dimensions. This ensures that every jar produced has consistent dimensions and a perfect matching cap thread.
| Parameter | Specification |
|---|---|
| Mold Steel Grade | S136 (Equivalent to AISI 420 mod.) |
| Cavity Count | 1 × 4 (4 cavities) |
| Mold Base | Standard or custom (LKM, HASCO, DME) |
| Mold Dimensions (L×W×H) | Customized per customer request |
| Ejection System | Ejector pins + stripper plate (if required) |
| Cooling Channels | Conformal cooling (baffles, spirals, or standard) |
| Cycle Time Estimate | 30–50 seconds (varies with wall thickness) |
| Injection Machine Compatibility | 80–150 ton (recommended) |
Advantages for Your Business
- Reduced Post-Processing Costs: The high-polished S136 cavity surface (up to SPI A-1 grade) produces a clear, glossy jar surface directly from the mold, eliminating the need for secondary sanding or coating.
- Consistent Quality Across Batches: With precise temperature control and repeatable process parameters, every jar from all four cavities meets the same strict quality standards – essential for brand consistency.
- Fast ROI: The 1×4 cavity design increases your hourly output without a proportional increase in mold cost. Typical payback period is under 6 months for volume production.
- Durability for Long Production Runs: S136 steel offers excellent wear resistance; our molds are rated for 1,000,000+ shots with proper maintenance, making them a cost-effective long-term investment.
- Full OEM Support: From your initial design concept to final mold trials, we provide engineering assistance for gate location, cooling layout, and venting optimization. We can also customize the mold for specific jar neck finishes, cap threads, or embossed logos.
Trust & Reliability
Since our establishment in 2017, Changzhou Hongxinyutai Precision Mold Co., Ltd. has dedicated ourselves to excellence in mold manufacturing. With a skilled team of 51–100 employees and a production area of 1,000–3,000 square meters, we are equipped to handle complex injection mold projects. Our products have been exported to markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Europe, demonstrating our global capability. We hold the TS16969 certification, reflecting our commitment to automotive-grade quality management standards – a benchmark we apply to every mold we produce, including packaging molds.
Whether you need a single prototype mold or a multi-cavity production tool, we are your reliable partner. Contact us today to discuss your PMMA jar project and receive a competitive quotation with a short lead time.
Frequently Asked Questions
Q1: What is the typical lifespan of this S136 steel mold for PMMA jars?
A: With proper maintenance, S136 molds can exceed 1,000,000 injection cycles. The actual lifespan depends on the jar's wall thickness, molding parameters, and regular cleaning. We recommend periodic polishing of the cavity surface to maintain transparency quality.
Q2: Can you customize the mold for different jar sizes or shapes?
A: Absolutely. Our OEM service allows full customization of cavity geometry, height, diameter, wall thickness, and thread design. Just provide your 3D drawing or sample, and we will adjust the mold accordingly.
Q3: How do you ensure the mold produces void-free thick-wall PMMA jars?
A: We use Moldflow simulation to optimize the gate location, fill pattern, and cooling channels. For thick-wall parts, we often employ a slow injection speed with a holding pressure profile to pack the cavity uniformly and avoid sinking or bubbles.
Q4: What injection machine tonnage is required for this 1×4 cavity mold?
A: For typical PMMA jars (50–150 ml volume), an 80–150 ton injection molding machine is suitable. The exact requirement depends on the projected area of the 4 cavities. We will provide the recommended clamping force during the design phase.
Q5: Do you offer hot runner systems for this mold?
A: Yes, we can equip the mold with a hot runner system (valve gate or open gate) to eliminate sprue waste and reduce cycle time. Hot runners are especially advantageous for large-volume production. We partner with reputable brands like YUDO or HUSKY upon request.
Q6: What is the typical lead time for a custom 1×4 PMMA jar mold?
A: Lead time ranges from 30 to 45 working days after design approval, depending on the complexity. We prioritize rush orders with a dedicated team for fast-track projects.
Q7: How do you guarantee the mirror finish on the jar surface?
A: S136 steel can be polished to a mirror finish (Ra 0.02 μm or better). Our skilled mold polishers use diamond paste and ultrasonic techniques to achieve a flawless surface that transfers directly to the PMMA jars.
Q8: What quality control steps do you follow before shipping?
A: Each mold undergoes dimensional measurement with CMM, trial runs on an injection machine, and visual inspection of molded parts. We provide a mold trial report and samples before shipment. Our TS16969-certified quality system ensures all processes are documented and traceable.
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