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Structure and Operating Process of a Silicone Extruder

Time：

2021-09-02

In our daily lives, we often encounter silicone products—such as silicone gloves, door and window seals, LED flexible light strips, automotive glass seals, and even silicone items for the human body—making them an inseparable part of our everyday routines. However, most silicone products are manufactured using silicone extruders, particularly silicone tubes, silicone strips, and custom‑shaped silicone sheets, because these machines deliver high production efficiency, large output, and superior quality. Silicone extruders are essential equipment in the silicone industry, playing a critical role in the manufacture of tubing and strip products. Next, we will explore what exactly constitutes a silicone extruder.

In our daily lives, we often encounter silicone products—such as silicone gloves, door and window seals, LED flexible light strips, automotive glass seals, and even silicone body parts—making them an inseparable part of our routines. Most of these items are manufactured using silicone extruders, particularly for silicone tubes, strips, and custom‑shaped profiles, because silicone extrusion offers high production efficiency, large output, and excellent quality. Silicone extruders are essential equipment in the silicone industry, playing a critical role in the manufacture of tubing and strip products. Next, we’ll explore what constitutes a silicone extruder and how it operates. Then, we’ll examine its applications and see how it impacts our everyday lives. What changes lie ahead?

I. Structural Composition of the Silicone Extruder Process

A silicone extruder primarily consists of a drive motor, a gearbox, a speed controller, a feed hopper, an extrusion screw, and an extruder die.

II. Analysis of the Operating Process of a Silicone Extruder

1. Preparations Before Starting the Silicone Extruder

(1) Inspect all components of the machine for abnormalities, check fasteners for looseness, and verify that there are no leaks in the piping.

(2) The gearbox shall be filled with filtered lubricating oil, and the oil level shall correspond to the mark on the oil level indicator; each lubrication point shall be adequately greased.

(3) Prepare the tray and various tools;

(4) According to the production task order issued by the machine, transfer the plasticized rubber to the feed inlet; after verifying that the core is qualified, place it on the wire‑unwinding rack.

(5) Match the die sleeve and the die core.

2. Start the silicone extruder.

(1) Start the drying jacket and set the temperature according to process requirements.

(2) Start the heater and set the temperature according to process requirements.

(3) Prior to formal startup, check whether there are periodic shocks or other abnormal noises during operation, and inspect the screw and bushing for any scratches.

(4) Thread the conductor through the die core and connect it to the lead wire; pass the lead wire through the heating sleeve, the spark tester, and the powder cartridge; wrap it 3–4 times around the take-up roller; then secure the wire onto the take-up reel.

(5) Die Calibration: Start the screw, slowly turn the speed‑control potentiometer, and once the compound is extruded, proceed with die calibration. The die can be adjusted using the large bolt on the knob head. After the initial adjustment, extrude a short length of material, mark the cable surface to indicate the orientation, and check for eccentricity. Once the die is properly set, normal production may commence.

(6) During normal production, monitor equipment operation and product quality. Continuously measure the outer diameter and inspect the appearance. The cable surface shall be smooth, uniformly colored, free from mechanical damage, and devoid of obvious bamboo‑joint‑like irregularities or visible impurities.

(7) After extruding a cable coil or once the extrusion reaches a specified length, repeatedly inspect the cable’s diameter and surface appearance. The outer layer of each coil must maintain a prescribed clearance from the side plates. Attach the process card and record the results.

(8) If the silicone extruder exhibits any abnormal phenomena or unusual noises during operation, it shall be stopped immediately for inspection and repair, or the relevant department shall be notified.