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Help CenterOEM Food Bottle Cap Injection: 1*24 Hot Runner, S136 Steel, FDA Compliant
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Changzhou Hongxinyutai Precision Mold Co., Ltd. (founded in 2017) is a dedicated manufacturer of high-precision injection molds for the food packaging industry. Our OEM Food Bottle Cap Injection Mold with a 1*24 hot runner system and S136 steel construction is engineered to produce high-quality, FDA-compliant bottle caps at maximum efficiency. With a factory spanning 1,000–3,000 square meters and a skilled team of 51–100 employees, we deliver molds that meet the rigorous demands of global food and beverage brands. This mold is your reliable partner for consistent, safe, and cost-effective cap production.
The mold is designed for high-cavitation output (24 cavities per cycle) using a self-contained hot runner manifold that ensures precise melt distribution, reduces waste, and shortens cycle times. Constructed from premium S136 stainless steel — known for its corrosion resistance, high hardness, and excellent polishability — the mold guarantees long service life and outstanding part finish. Every cavity is built with tight tolerances (≤0.01 mm) to produce caps with consistent dimensions and flawless sealing surfaces. The mold fully complies with FDA regulations for food contact materials, making it suitable for carbonated beverages, water bottles, sauces, and more.
Key Features & Technical Specifications
- Hot Runner System: 1*24 independent valve gates for balanced filling, minimal pressure drop, and fast cycle times (as low as 4–6 seconds).
- Mold Steel: S136 hardened to 48–52 HRC, with mirror polish (Ra ≤ 0.02 μm) for easy release and smooth cap surface.
- Cavity Count: 24 cavities in a compact layout, maximizing output per shot while maintaining stability.
- Cooling System: Optimized conformal cooling channels for uniform heat extraction, reducing cycle time and warpage.
- FDA Compliance: All cavity surfaces and hot runner components use materials that meet FDA 21 CFR 177.1520 for direct food contact.
- Interchangeable Inserts: Optional quick-change core and cavity inserts for different cap sizes (e.g., 28 mm, 38 mm).
- Ejection System: Precision push-pin ejection with stroke control to avoid cap deformation.
- Mold Base: Durable standard mold base (LKM or equivalent) with guided alignment, hardened guide pins, and bushings.
Technical Parameter Table
| Parameter | Specification |
|---|---|
| Mold Size (L×W×H) | Actual dimensions customized per machine, typical ~500×400×450 mm |
| Mold Weight | ~350–450 kg (depending on configuration) |
| Hot Runner Controller | Yudo or equivalent, 24-zone PID control ±1°C |
| Max Injection Pressure | 2000 bar (designed for standard injection units) |
| Cycle Time (typical) | 4–6 seconds for thin-wall caps (0.6–1.0 mm wall thickness) |
| Material Compatibility | PP, PE, HDPE, LDPE (FDA-grade resins) |
| Surface Roughness (cavity) | Ra ≤ 0.02 μm mirror finish |
| Expected Lifetime | > 1 million shots (with proper maintenance) |
Benefits for Your Production
- Higher Output: 24 cavities per cycle means you can produce up to 14,400 caps per hour (at 6 s cycle). Ideal for high-volume bottling lines.
- Consistent Quality: Tight cavity-to-cavity balance and uniform cooling ensure every cap meets the same weight, diameter, and seal performance.
- Reduced Downtime: S136 steel minimizes corrosion from moisture and acid cleaning, keeping the mold running longer without polishing.
- Lower Scrap Rate: Hot runner eliminates cold runners, saving material and reducing regrind costs. No runner scrap means less waste.
- Quick Changeover: Optional interchangeable inserts allow you to produce different cap sizes in hours, not days.
- Global Compliance: FDA-compliant design gives you confidence to export caps to North America, Europe, and other regulated markets.
Why Choose Changzhou Hongxinyutai Precision Mold?
With over 7 years of expertise in precision mold manufacturing, we are a TS16969-certified factory (automotive-grade quality management system) that applies the same rigorous standards to food packaging molds. Our 1,000–3,000 m² facility houses advanced CNC machining centers, EDM, wire cut, and CMM inspection equipment, allowing us to hold tolerances as tight as ±0.005 mm. We have exported molds to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East – serving clients in the food, beverage, and medical industries. Our team of 51–100 experienced technicians provides full after-sales support: installation guidance, troubleshooting, and spare parts supply. When you choose our OEM Food Bottle Cap Injection Mold, you get a product that combines precision, durability, and regulatory compliance – backed by a manufacturer committed to your success.
Contact us today to discuss your cap dimensions, expected output, and preferred machine specifications. We can customize the mold to match your injection press (tonnage, tie-bar spacing) and deliver from our ports in Jiangsu, Shanghai, or Shenzhen with competitive lead times.
Frequently Asked Questions
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Q: What materials can this mold process? Is it suitable for PP and HDPE?
A: Yes, the mold is designed for common food-grade resins such as PP, HDPE, LDPE, and PE. The hot runner system and gate design are optimized for low-viscosity polymers. Please provide your specific resin grade so we can fine-tune the runner balance. -
Q: How long does it take to manufacture this mold?
A: Typical lead time is 25–35 working days from design approval, depending on complexity and current workload. We offer expedited service for urgent orders upon request. -
Q: Can I get a sample of the caps before mass production?
A: Yes, we provide trial shots at our factory. We can send you a set of sample caps from the mold after T1 trial. Shipping costs are negotiable. -
Q: What warranty do you offer on the mold?
A: We provide a 12-month warranty against manufacturing defects, covering all components including hot runner nozzles and heaters. Normal wear of consumables (filters, O-rings) is excluded. We also offer long-term technical support after warranty. -
Q: Can the mold be adapted to different injection molding machines?
A: Absolutely. We customize the mold base and clamping dimensions to match your machine make and model. Please provide the machine specifications (tie bar distance, max/min mold height, and injection unit) when ordering. -
Q: Does the mold include a hot runner controller?
A: The mold itself does not include the controller. However, we can recommend compatible controllers from well-known brands (e.g., Yudo, anaba) and provide wiring diagrams. We can also purchase the controller on your behalf as an added service. -
Q: How do you ensure FDA compliance for the mold?
A: All steel grades (S136) and hot runner nozzle materials are selected from approved suppliers. We provide a material certificate upon request. In addition, the cavity surfaces are polished to a mirror finish to prevent chemical retention, and we use only food-grade lubricants during assembly. A declaration of FDA compliance is included with the shipment. -
Q: What is the mold’s expected lifespan? Can it be repaired if damaged?
A: With regular maintenance (cleaning, lubrication, and checking wear), the mold can produce over 1 million cycles. In case of damage, our workshop can perform repairs, including cavity welding, re-polishing, or replacement of hot runner components.
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