In routine production, the primary function of a rubber extruder die is to guide the extruded compound toward the die opening. At the same time, it redirects the irregular, unstable flow exiting the extruder screw channels, transforming it into a steady, uniform flow that passes through the die opening to form extrudates—such as strips, tubes, or profiled products—with consistent cross-sectional shapes. A die is mounted in front of the die head; the die determines the shape and dimensional specifications of the extruded semi‑finished product. Die configurations are generally classified into two types: one is used for producing hollow extrudates and consists of an outer die, a core, and a support structure; the other is employed for solid extrudates or sheet‑like finished products and takes the form of a shaped perforated plate.

A rubber extruder, used for extruding rubber materials, is a fundamental piece of equipment in the rubber industry. It is one of the key machines that significantly influence product quality and plays an important role in the production of tires and rubber products. It is widely applied in manufacturing automotive tires, automotive weatherstrips, rubber sealing strips, door and window weatherstrips, and more.

The “die head” of a silicone extruder essentially refers to the extruder itself. Since silicone extruders typically achieve extrusion‑molding during production, they are positioned at a specific station in the silicone‑product manufacturing line. Consequently, within the entire production line, the extruder can be regarded as the die‑head component; hence, we often refer to it as the silicone extruder die head or simply the extruder die head.

The primary function of a silicone extruder die is to facilitate the extrusion molding of silicone materials. As a fundamental piece of equipment in the silicone industry, the silicone extruder is used to extrude silicone compounds and plays a crucial role in the production of silicone products and LED light strips. It typically consists of an extrusion die, an extrusion screw, a drive motor, a reduction gearbox, a speed controller, and a feed inlet, and is employed in manufacturing silicone tubes, silicone strips, silicone sealing strips, tracheal intubation tubes, urinary catheters, LED protective sleeves, flexible LED light strips, soft light bars, and more.

So, we’ve now learned about the primary functions of the die heads for silicone extruders and rubber extruders. Next, let’s examine the differences between these two types of extruders.

The primary differences between silicone extruders and rubber extruders stem from the distinct raw materials they process and the industries in which they are used. Beyond that, what is another major distinction between these two types of extruders?

Because silicone rubber is more difficult to feed than conventional rubber, the primary difference between a silicone extruder and a rubber extruder lies in the screw’s compression ratio.

Silicone rubber screws have a high compression ratio, typically around 2 to 2.5, whereas rubber screws have a lower compression ratio: hot-feed screws usually range from 1.3 to 1.4, and cold-feed screws generally fall between 1.7 and 1.8. In addition, silicone extruders are equipped with a forced‑feeding device to facilitate material intake.

Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise that integrates the research and development, manufacturing, and sales of complete sets of extrusion equipment for rubber, silicone, and plastics. Our company is located in Liyuantun Industrial Zone, Weixian County, southeastern Hebei Province, enjoying a favorable geographical location and convenient transportation access.

Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise that integrates research and development, manufacturing, and sales of complete sets of extrusion equipment for rubber, silicone, and plastics. The company’s main products include rubber extruders, rubber hose extrusion lines, three‑layer composite sealing strip extrusion lines, silicone sealing strip production lines, plastic sealing strip production lines, plastic profile production lines, plastic pipe production lines, elastomer extruders, and other extrusion equipment, as well as production machinery for engineering seals, automotive seals, wire and cable applications, air‑conditioning hoses, braided hoses, automotive hoses, waterstop strips, and related products.