PU Gasket Dispensing Machine: A Complete Technical Guide for Industrial Sealing Automation

PU Gasket Dispensing Machine: A Complete Technical Guide for Industrial Sealing Automation

[IMAGE: Cover | product+scene | https://cdn.socialarks.com/sbsp/24749/1/2026/0408/69d5f59ac648c.jpg | PU gasket dispensing machine KW-510B in an industrial production line]

Shanghai Kaiwei Intelligent Technology (Group) Co., LTD (KAIWEI) is a Chinese manufacturer specializing in the R&D and production of industrial sealing systems, robot foaming equipment, and intelligent dispensing equipment for industries including electrical control panels, automotive parts, lighting, and home appliances. This article provides a complete technical and application overview of the PU gasket dispensing machine, a two-component polyurethane foaming and sealing system used for automated in-place gasketing (FIPFG) in industrial environments.

What is a PU Gasket Dispensing Machine?

A PU gasket dispensing machine is an automated dispensing system that mixes and applies liquid polyurethane (PU) foam directly onto a substrate to form a custom-shaped gasket. This process is known as Formed-In-Place Foam Gasketing (FIPFG). The machine replaces traditional pre-cut rubber gaskets with a precisely dispensed foam seal that cures after application. KAIWEI's PU gasket dispensing machine is a two-component foaming machine that meters and mixes polyurethane resin and hardener in a controlled ratio before dispensing the mixture through a mixing head directly onto the part.

Industry Background and Application Scenarios

The need for automated sealing solutions has grown across multiple industrial sectors as manufacturers seek higher throughput, consistent quality, and reduced material waste. KAIWEI's PU gasket dispensing machine is applied in automatic sealing projects where it provides dust-proof sealing and explosion-proof sealing for enclosures. It operates in a 24/7 continuous operation mode and is designed to integrate with an automatic gluing production line. The product functions within an operating temperature range of -20 to 40 degrees Celsius.

[IMAGE: Supporting/Diagram | specs/process | https://cdn.socialarks.com/sbsp/24749/1/2026/0408/69d5f93abf94d.jpg | Application field diagram of PU gasket dispensing machine across electrical, home appliance, and automotive industries] The product is used in the following key industries: - Electrical Control Panels
- Electrical Distribution & Industrial Control
- Explosion-proof Electrical & Special Electrical
- Lock & Hardware Accessories
- Home Appliances
- Auto Parts & Components
- Lighting & LED Lighting
- Purification, Environmental Protection & Filtration Equipment
These application scenarios are common in over 30 countries, including the United States, India, Germany, Japan, Saudi Arabia, Russia, and Egypt.

Detailed Solution: KAIWEI PU Gasket Dispensing Machine

KAIWEI manufactures a series of PU gasket dispensing machines designed for different production volumes, part sizes, and sealing requirements. The machines use a low-pressure dispensing process suitable for polyurethane foam. All models feature a touch screen HMI, operate via PC or teach pendant, and use a motion control card combined with a PLC for precise control of the dispensing path.

Key Models and Specifications

KW-510B

The KW-510B is a 3-axis linear robot arm machine with an effective stroke of 2250*1250*200mm, suitable for medium to large enclosure sealing. It uses a KW mixing head and can produce seal strip widths of 4-30mm. It supports manual or automatic filling of raw material tanks with a volume of 40L each for both A and B components. The running speed reaches 0-12000mm/min.

KW-520 Series

The KW-520A and KW-520B models offer various configurations. The KW-520A uses a 10.2-inch PC touch screen and a Nidec servo motor. The KW-520B uses a 15-inch screen and supports ABB or Fuji servo motors. Both share an effective stroke of 22501250200mm and a 4-30mm seal width.

KW-523 and KW-523A

The KW-523 and KW-523A models have a smaller effective stroke of 1250*800*200mm, making them ideal for compact parts. They can handle both polyurethane and silicone. The KW-523A offers a wider seal strip width range of 2-60mm, compared to the standard 2-10mm/10-60mm split range.

KW-526 (6-Axis Model)

The KW-526 is the advanced 6-axis linear robot arm model. It provides a customizable effective stroke, a 2-60mm seal strip width range, and a running speed of 0-12000mm/min. This multi-axis configuration enables sealing of more complex 3D geometries. It supports servo motors from Xinje, ABB, Fuji, and Panasonic.

Step-by-Step Dispensing Process

1. Material Loading: Polyurethane resin (A component) and hardener (B component) are loaded into separate 40L air pressure tanks. Manual or automatic filling is available.
2. Metering: Two KAIWEI or Barmag metering pumps (A3cc/r, B0.6cc/r) precisely control the mixing ratio, adjustable between 1:1 and 10:1.
3. Mixing & Dispensing: The two components are mixed in the KW800 or KW-900 mixing head. The mixed liquid is then dispensed onto the substrate at high pressure water cleaning after use.
4. Robot Path Execution: The 3-axis or 6-axis linear robot arm moves the mixing head along the programmed path at speeds up to 12000mm/min.
5. Curing: The liquid PU foam cures on the part, forming a compressible, dust-proof, and explosion-proof foam gasket.

[IMAGE: Supporting/Diagram | process | https://cdn.socialarks.com/sbsp/24749/1/2026/0408/69d5f7f160672.jpg | KAIWEI KW526 PU gasket dispensing machine teaching pendant and control interface]

Comparison of KAIWEI PU Gasket Dispensing Machine Models

Parameter	KW-510B	KW-520A	KW-520B	KW-523	KW-526
Frame Structure	3-Axis Linear	3-Axis Linear	3-Axis Linear	3-Axis Linear	6-Axis Linear
Effective Stroke	2250*1250*200mm	2250*1250*200mm	2250*1250*200mm	1250*800*200mm	Customized
Seal Strip Width	4-30mm	4-30mm	4-30mm	2-10mm / 10-60mm	2-60mm
Running Speed	0-12000mm/min	0-12000mm/min	0-1200mm/min	0-1200mm/min	0-12000mm/min
Servo Motor	Xinje	Nidec	ABB / Fuji	STEP/Leadshine/Nidec/Panasonic	Xinje/ABB/Fuji/Panasonic
Mixing Head	KW-900	KW800	KW-900	KW800 / KW-900	KW800 / KW-900
Raw Material	Polyurethane	Polyurethane	Polyurethane	Polyurethane / Silicone	Polyurethane

Key Specifications and Capabilities

All KAIWEI PU gasket dispensing machines share a common set of core capabilities. The machines are built with a carbon steel, stainless steel 304, or aluminum alloy workbench structure. The guide rails are sourced from AIRTAC, and the reducers are from Senad. All models require an air pressure of ≥6bar with an oil-water separator for air source treatment. The power supply is 220V or 380V, with power consumption of 4kW to 5.5kW. The machines are designed for high-pressure water cleaning and include a water tank with a front level sensor and outlet filtration.

Case Studies and Trust Factors

KAIWEI is a state-level high-tech enterprise holding over 100 national patents. The company has an annual production capacity of approximately 2000 units and an R&D team of over 30 engineers. The manufacturing facility covers 20000m²+. The company's products have passed international certifications including CE and ISO9001. KAIWEI serves markets in over 60 countries, including Germany, the United States, and Southeast Asia. Export business accounts for approximately 70% of total sales.

[IMAGE: Proof | factory/cert/case | https://cdn.socialarks.com/sbsp/24749/1/2026/0407/69d4c6108be61.jpg | KAIWEI factory shows production line and quality control area for PU gasket dispensing machines]

Frequently Asked Questions

Conclusion

The PU gasket dispensing machine from KAIWEI provides a reliable, automated solution for Formed-In-Place Foam Gasketing across a broad range of industrial applications. With multiple models from the 3-axis KW-510B to the 6-axis KW-526, KAIWEI offers configurations for different part sizes, throughput requirements, and sealing materials. Backed by over 20 years of manufacturing experience, a dedicated R&D team of 30+ engineers, and exports to over 60 countries, KAIWEI supplies intelligent sealing systems that help manufacturers achieve consistent, high-quality seals while reducing material waste.

For an in-depth look at the complete product line, download the KAIWEI product brochure.

[IMAGE: CTA | sample/quote/catalog/distributor | https://cdn.socialarks.com/sbsp/24749/1/2026/0407/69d4c60fe9b0b.jpg | KAIWEI factory overview for PU gasket dispensing machine inquiries and OEM/ODM cooperation]