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4-Cavity Liquid Silicone Rubber Pressure Cooker Sealing Ring, 40-Second Fully Automated Production Solution

The liquid silicone rubber (LSR) pressure cooker sealing ring market demands high dimensional accuracy, excellent heat/pressure resistance, and consistent sealing performance across every part. Traditional compression molding or low-cavitation injection struggles with flash, gate marks, uneven wall thickness, and manual deflashing — all of which drive up cost and put seal integrity at risk.

Cycle Time

40 seconds

Cavities

4

Output

~8,640 pieces/day (24h operation)

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Silicone sealing ring for pressure cooker - TYM

Core Technology Breakdown

TYM 7078 Vertical LSR Injection Molding Machine

Our vertical 7078 LSR injection molding machine is purpose-built for large-diameter, thick-section silicone parts like pressure cooker sealing rings. Key specifications include:

- ▸ Vertical clamping and injection layout — ideal for large-diameter ring-shaped parts and easy manual/robotic insert handling
- ▸ LSR metering and mixing system with precision plunger injection unit
- ▸ Closed-loop servo control for consistent shot weight and uniform cross-section density
- ▸ Designed for 40-second cycle time at full 4-cavity production
- ▸ Integrated mold and injection unit temperature control for stable vulcanization of thicker sealing-ring cross-sections

The machine delivers the stable clamping force and precise low-pressure injection required for large, thick-walled LSR sealing rings without sink marks or internal voids.

Silicone sealing ring mold for pressure cooker - TYM

8-Nozzle Needle-Valve Precision Injection Control

Each of the 4 cavities is fed by 2 independent needle-valve nozzles (8 nozzles total), a configuration specifically designed for the larger part size of a pressure cooker sealing ring:

- - ▸ Dual-gate feed per cavity ensures balanced, simultaneous fill across the full ring circumference
  - ▸ Independent open/close control per nozzle eliminates weld lines and uneven flow fronts on large ring geometries
  - ▸ Precise timing control allows sequential or simultaneous injection profiles for optimal fill balance
  - ▸ Reduces material waste — no sprues or runners in the traditional sense

Result: Every sealing ring is uniform in wall thickness, weight, and hardness — critical for consistent pressure-holding performance.

4-Cavity Cold-Runner Mold — No Sprue, No Flash

- ▸ 4-cavity cold-runner system with 8 needle-valve cold nozzles — zero material waste, no runner recycling needed
  - ▸ No water gate (sprueless) design — eliminates gate vestige entirely on the finished sealing surface
  - ▸ Precision-machined parting line ensures zero flash on the critical sealing face and inner/outer diameter
  - ▸IProprietary cooling channel layout ensures uniform temperature across all 4 large cavities
  - ▸ Optimized venting prevents trapped air and short shots in thick cross-section areas

- ▸ Automatically extracts all 4 finished sealing rings simultaneously after mold opening inspection/packaging
  - ▸ Places parts on conveyor or into organized trays for downstream inspection/packaging
  - ▸ Eliminates manual part removal — zero operator exposure to hot mold surfaces
  - ▸ Cycle-synchronized operation — no added cycle time for part extraction

With the robotic arm, the entire production cell runs with minimal human intervention, reducing labor costs and eliminating ergonomic risk from repetitive large-part handling.

Production Detail: A single operator can manage multiple production cells simultaneously, each producing ~8,640 sealing rings per day.

Key Benefits at a Glance

Benefit	Detail
40-Second Cycle	Efficient cycle time for 4-cavity, large-format LSR sealing ring production.
Zero-Waste Molding	Cold-runner system + 8-nozzle needle-valve gating = no sprues, no runners, no deflashing. Near 100% material utilization.
No Water Gate, No Flash	Sprueless cold-runner design and precision parting line produce clean, flash-free sealing surfaces ready for use.
Fully Automated	Robotic extraction + conveyor integration = true lights-out operation. One operator oversees multiple cells.
Consistent Quality	Dual-gate per-cavity control ensures uniform wall thickness and sealing performance across every ring.
Fast Time-to-Market	Complete turnkey solution — machine, mold, automation, and process parameters tuned and validated before shipment.
Lower Labor Cost	Automation eliminates manual trimming, inspection sorting, and repetitive handling labor.

Pressure cooker silicone o ring mold - TYM

Technical Specifications

Parameter	Specification
Machine Type	TYM 7078 Vertical LSR Injection Molding Machine
Injection System	Servo-driven plunger, closed-loop control
Mold Cavities	4 cavities, cold-runner design
Gate Type	Needle-valve cold nozzles, 2 per cavity (8 total)
Gate/Flash Condition	No water gate (sprueless), no flash
Cycle Time	40 seconds (4 pieces per cycle)
Daily Output (24h)	~8,640 pieces
Automation	Robotic pick-and-place arm
Material	Liquid Silicone Rubber (LSR)
Application	Pressure cooker sealing ring / gasket

One Supplier. One System. One Guarantee.

Rather than sourcing the machine, the mold platform, and the insert sets from separate vendors, we deliver the entire catheter production system — machine, shared mold base, and the full set of size-specific inserts — from a single source:

No Integration Headaches:

The machine and mold are designed together to ensure optimal performance and seamless compatibility.

Single-Point Responsibility:

We take full accountability for the overall quality, performance, and after-sales service of the entire system.

Pre-Tested and Validated:

The complete system is rigorously tested, tuned, and validated as a single functioning unit before delivery.

Faster Ramp-Up:

With process parameters already configured, your team can start mass production within days of installation.

Proven in Production

Our 4-cavity LSR pressure cooker sealing ring solution is already running in production environments, delivering:

High Yield Rate:

Consistently achieves industry-leading pass rates during both visual and dimensional inspections.

Uniform Wall Thickness:

Dual-gate cavity balancing keeps cross-section thickness consistent around the full ring, ensuring reliable pressure sealing.

Zero Post-Processing Requirement:

Produces flash-free, gate-mark-free parts, completely eliminating the need for deflashing or gate trimming.

Long-Term Process Stability:

Sprueless cold-runner design maintains stable output without process drift over extended production runs.

Made for Global Standards

CE-Certified Safety

All electrical components and integrated safety systems are fully CE-certified, guaranteeing safe and reliable operation in global manufacturing environments.

FDA & EU Compliant Processing:

Engineered to meet strict hygiene standards, our system is fully capable of processing food-grade and medical-grade LSR materials compliant with FDA and EU regulations.

ISO 9001 Quality Management:

Our entire workflow—from initial R&D and mold design to manufacturing and final testing—is strictly governed by ISO 9001 quality management protocols.

Comprehensive Global Support:

We provide complete English technical documentation, intuitive English PLC interfaces, and highly responsive global technical support for commissioning and troubleshooting.

Frequently Asked Questions

Projects

Can this system handle different sealing ring sizes and pressure cooker models?

Yes. The mold design can be customized for different ring diameters, cross-section profiles, and hardness specifications. The machine's injection parameters are fully programmable for quick changeovers between products. We recommend dedicated molds for each product for optimal cycle time and quality.

What is the typical ROI period?

Most customers achieve full ROI within 8–12 months, depending on production volume and local labor costs. The combination of the sprueless cold-runner process, 4-cavity output, and near-zero labor requirement delivers a significant per-piece cost reduction compared to conventional compression molding or low-cavitation injection.

What training and support do you provide?

We provide comprehensive on-site training for operators and maintenance technicians, complete documentation (machine manual, mold maintenance guide, process parameters), and remote technical support. Our engineers are available for on-site commissioning and troubleshooting worldwide.

Can existing molds be adapted to this machine?

Our vertical 7078 machine uses standard mounting patterns and ejector configurations. Existing molds can often be adapted with minor modifications. We provide a free compatibility assessment for any existing mold you wish to run on our system.

Ready to Transform Your Nipple Production?

Contact us today for a free consultation, process analysis, and quotation.

We can provide production simulations, sample molding, and ROI projections tailored to your specific requirements.