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Seal Strip Extruder Manufacturer: Rubber Seal Strip Extrusion Operation Technology

Time：

2022-07-06

Seal strip extruder manufacturer: Today, rubber seal strips are used in a wide range of applications, including automobiles, doors and windows, machinery, and equipment. Those familiar with rubber seal strips may already know that they come in various materials and are typically produced by extrusion through molds. However, few outsiders are aware of the specific extrusion techniques involved in their manufacture.

Seal strip extruder Manufacturers: Today, rubber sealing strips are used in a wide range of applications, including automobiles, doors and windows, machinery, and equipment. Those familiar with rubber sealing strips may already be aware of the various materials available and know that they are typically produced by extrusion using molds. However, few non‑specialists understand the extrusion techniques involved in manufacturing these products.

Seal strip extruder manufacturer: Below, we will introduce the extrusion process for rubber seal strips.

Seal strip extruder Manufacturer: 1. The extrusion process for sealing strips has evolved from single- or double‑extrusion of hard rubber (soft rubber), sponge rubber, and metal‑reinforced composites to four‑layer or even more complex co‑extrusion techniques, enabling the simultaneous production of rubber components with varying types, materials, and colors. Some advanced technologies feature high technical content and low labor intensity, allowing for in-line electrostatic flocking—either single‑sided or double‑sided—and supporting on‑line spraying of polyurethane, silicone oil, or other coatings.

Seal strip extrusion machine manufacturer: 2. Batch vulcanization method (cutting the extruded seal strips to a specified length and placing them in a vulcanization tank for curing, or placing the extruded semi‑cured seal strips into molds for vulcanization).

Seal strip extruder Manufacturer: 3. Continuous vulcanization (including microwave continuous vulcanization, salt-bath continuous vulcanization, hot-air continuous vulcanization, etc.).

A. Microwave Continuous Vulcanization Composite Sealing Strips: Microwave vulcanization is a manufacturing technology that gained widespread adoption and promotion in the 1970s following the energy crisis. By employing microwave continuous vulcanization, it is possible to produce a variety of composite sealing strips, including those with metal cores, solid rubber, and sponge rubber. Moreover, compared with other continuous vulcanization equipment, this method offers distinct advantages in energy savings and enhanced operational efficiency. This technology is internationally recognized as an excellent approach for manufacturing extruded sealing strip products. A key feature of microwave heating is that heat is generated directly within the material being heated, rather than being supplied from the outside as in conventional methods. This results in rapid heating and uniform heat distribution, which helps improve product quality and significantly reduces heating time.

B. Salt-Bath Continuous Vulcanization Sealing Strips: Salt-bath vulcanization employs a salt-containing bath system, which has caused significant environmental pollution and has therefore been phased out. Vulcanization (TMAX: 450°C, Vmax: 60 m/s) can also achieve the same effect as flame pre‑treatment, with greatly improved safety.

Hebei Shuangda Rubber and Plastics Machinery Co., Ltd. primarily manufactures the following equipment: rubber composite extrusion lines and hose extrusion lines, which are widely used in the rubber industry for extruding oil-resistant hoses, heater hoses, wire‑reinforced hoses, inner tubes, and other rubber products; silicone extrusion lines, suitable for producing silicone tubes, composite silicone tubes, silicone strips, and various other silicone‑based products; butyl rubber extrusion lines, whose output is mainly employed for waterproofing and thermal insulation in crack‑seal applications and large‑scale construction projects; and PVC plastic sealing strip production lines, capable of manufacturing PVC sealing products in a wide range of specifications and dimensions.