In our daily lives, we often encounter silicone gloves, door seals, LED soft lights, automotive window films, and various silicone sealing products—evidence that such items are closely intertwined with our everyday routines. However, most silicone‑based sealing components are manufactured using silicone extruders, particularly for silicone tubes, rubber strips, and custom‑shaped silicone profiles. These extruded sealing products boast high production efficiency, substantial output, and excellent quality, making the silicone extruder an indispensable piece of equipment that plays a critical role in the manufacturing of tubing and strip‑type components. Now, let’s take a closer look at the structural composition of a silicone extruder.

1. Seal strip extruder Process Structure Composition

The extruder for sealing strips primarily consists of a drive motor, a reduction gearbox, a speed controller, a feed hopper, an extrusion screw, and an extrusion die.

II. Analysis of the Extruder Operation Process for Sealing Strips

1. Preparations Before Starting the Sealing Strip Extruder

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

2) The transmission shall be filled with filtered lubricating oil, and the oil level shall correspond to the mark on the oil dipstick. Sufficient grease shall be applied to all lubrication points.

3) Prepare the turntable and various tools.

4) According to the production task order issued by the machine, transport the compounded rubber to the feed inlet; after passing core inspection, place it on the unwinding rack.

5) Please select the die sleeve and the die core.

2. Open Seal strip extruder Power supply

1) Start the drying jacket and carry out heating-up installation in accordance with process requirements.

2) Start the heater and carry out the heating-up process in accordance with process requirements.

3) Before startup and during operation, check for periodic impact noises or other abnormal sounds, and for any leakage between the screw and the liner.

4) The mandrel is threaded through the core and connected to the wire; the wire is passed through the oven and the powder‑coating machine’s powder hopper, wrapped 3–4 times around the take‑up roller, and then secured to the winding spool.

5) Start the main control screw, slowly turn the speed regulator potentiometer, and once the extruded compound is ready, proceed with main‑control operation. Adjust using the large bolt on the knob head. After the initial adjustment of the master die, pull it back a short distance, mark the cable surface to indicate the correct orientation, and verify that the conductors are properly aligned; once the master die is adjusted, normal production can commence.

6) During normal production, monitor equipment operation and product quality; regularly measure the outer diameter, inspect the appearance, and ensure that the cable surface is smooth, uniformly colored, free of mechanical damage, and devoid of obvious defects such as bamboo‑joint formations or foreign inclusions.

7) Extrude a cable reel or feed in a specified length. Repeatedly inspect the cable’s thickness and appearance. The outer surface of each cable reel must maintain a prescribed clearance from the side panels, and a process label must be affixed to every reel with corresponding records maintained.

8) If any abnormal phenomena or unusual noises occur during operation of the sealing strip extruder, the machine should be stopped immediately for inspection and repair, or the relevant department should be notified.

3. Shutdown of the Sealing Strip Extruder and Precautions

1) Sequentially disconnect the power supplies to the traction system, main unit, and other components; remove the machine head; strip away the rubber material; install the screw-type rubber extruder in a rearward‑extruding configuration to prevent component corrosion; then disconnect the main power supply.

2) After the mandrel and sleeve are oriented downward, remove the rubber material, wipe clean, apply grease, and affix a label indicating the bore diameter to prevent impact between the ends of the mandrel and sleeve.

3) Strictly prevent metal and other hard objects from entering the cylinder to avoid damaging the screw.

4) After shutdown, be sure to close the feed inlet.

5) When starting up, maintain full concentration to prevent accidents.

III. Introduction to Extrusion Molding Technology for Silicone Rubber Extruders

The extrusion molding process of a sealing‑strip extruder is also a complex procedure. At a specific low temperature, during tire production, the extrusion method is used to melt and plasticize the silicone rubber, which is then forced through a die to form the desired cross‑sectional profile. This is a highly demanding operation; before operating the sealing‑strip extruder, not only must all parameters be verified, but the operator must also possess extensive experience. Successfully completing this process requires the seamless integration of both technical expertise and practical know-how.

The above is what has been introduced. Seal strip extruder Its structural composition—please feel free to contact us if you would like more information!