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High-temperature baking channel vulcanizing technology of silicon rubber

A silicone rubber, high temperature technology, applied in the field of high temperature drying tunnel vulcanization process, can solve the problems of affecting the tear strength of silicone rubber, mixing of silicone rubber and vulcanizing agent, and long vulcanization time of silicone rubber, so as to shorten vulcanization time and control manufacturing Cost, low cost effect

Inactive Publication Date: 2014-10-01
安徽宏源特种电缆集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing market demand for silicone rubber cables and increasing production tasks, the traditional vulcanization process usually adds 320 to 400 grams of bis-2-4 vulcanizing agent to 20 kg of silicone rubber base material, and puts the mixed base material Enter the 18-inch rubber mixing machine and knead for 4 to 6 minutes, which will cause a contradiction in processing technology. The mixing time of 4 to 6 minutes cannot fully mix the silicone rubber and the vulcanizing agent. If the mixing time is increased , due to the heat generated by the friction between the roller and the rubber, the surface of the silicone rubber is pre-vulcanized, resulting in uneven vulcanization of the cable during the extrusion process, which affects the tear strength of the silicone rubber
Cut the mixed silicone rubber into finished products, extrude through an extruder, and pass through a 10-meter-long water tank with a temperature of 95-100°C, and then pass through a high-temperature oven with a temperature above 105-115°C. Vulcanization, due to the poor thermal insulation performance of the water tank and oven, the vulcanization time of silicone rubber is long and the efficiency is very low. Taking silicone rubber products with a thickness of 2mm as an example, the extrusion speed is usually 3 to 4 meters / min, and the efficiency is very low.

Method used

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  • High-temperature baking channel vulcanizing technology of silicon rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Taking a silicone rubber insulating product with a thickness of 2 mm as an example, the extrusion speed is controlled at 10 m / min. Add 900 grams of fumed silica and 300 grams of "Double 25" vulcanizing agent to 20 kg of silicone rubber base material, and knead for 12 minutes in a mixer to fully integrate the silicone rubber base material and "Double 25" vulcanizing agent After mixing, the silicone rubber is cut into rubber strips with a thickness of 10mm and a width of about 50mm. The cable insulation and sheath are extruded through a silicone rubber extruder. After extrusion, the cable is vulcanized through a 45-meter-long steam pipeline. The steam pipeline The internal pressure should be kept at 1.9Mpa atmospheric pressure, and the steam temperature should be kept at 180°C. After vulcanization, the cable is cooled by a 10-meter-long water tank, and the manufacture is completed.

[0020] According to statistics, under the above process conditions, the vulcanization ti...

Embodiment 2

[0022] Taking a silicone rubber sheathed cable product with a thickness of 2 mm as an example, the extrusion speed is 11 m / min. Add 1050 grams of fumed silica and 325 grams of "Double 25" vulcanizing agent to 20 kg of silicone rubber base material, and mix with the mixer for 13 minutes to fully integrate the silicone rubber base material and "Double 25" vulcanizing agent After mixing, the silicone rubber is cut into rubber strips with a thickness of 10mm and a width of about 50mm. The cable insulation and sheath are extruded through a silicone rubber extruder. After extrusion, the cable is vulcanized through a 45-meter-long steam pipeline. The steam pipeline The internal pressure should be kept at 2.0Mpa atmospheric pressure, and the steam temperature should be kept at 185°C. After vulcanization, the cable is cooled by a 10-meter-long water tank, and the manufacture is completed.

[0023] According to statistics, under the above process conditions, the vulcanization time of t...

Embodiment 3

[0025] Taking silicone rubber insulation or sheath cable products with a thickness of 2 mm as an example, the extrusion speed is 12 m / min. Add 1,200 grams of fumed silica and 350 grams of "Double 25" vulcanizing agent to 20 kg of silicone rubber base material, and knead for 14 minutes in a mixer to fully integrate the silicone rubber base material and "Double 25" vulcanizing agent. After mixing, the silicone rubber is cut into rubber strips with a thickness of 10mm and a width of about 50mm. The cable insulation and sheath are extruded through a silicone rubber extruder. After extrusion, the cable is vulcanized through a 45-meter-long steam pipeline. The steam pipeline The internal pressure should be kept at 2.1Mpa atmospheric pressure, and the steam temperature should be kept at 190°C. After vulcanization, the cable is cooled by a 10-meter-long water tank, and the manufacture is completed.

[0026] According to statistics, under the above process conditions, the vulcanizatio...

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Abstract

The invention provides a high-temperature baking channel vulcanizing technology of silicon rubber. The technology is characterized in that by changing the type and the matching of a silicon rubber material vulcanizing agent and changing a vulcanizing technology, a traditional water channel vulcanizing technology is replaced by a steam pipeline vulcanizing technology, so that a silicon rubber insulative or sheathed electric cable is prepared by vulcanizing. By adopting the vulcanizing technology provided by the invention, the insulative or sheathed layer of the electric cable is vulcanized fully; the silicon rubber vulcanizing speed is increased; the tearing-resistant intensity of the silicon rubber is enhanced.

Description

technical field [0001] The invention relates to a silicone rubber vulcanization process, in particular to a high-temperature drying tunnel vulcanization process using circulating steam. Background technique [0002] With the increasing market demand for silicone rubber cables and increasing production tasks, the traditional vulcanization process usually adds 320 to 400 grams of bis-2-4 vulcanizing agent to 20 kg of silicone rubber base material, and puts the mixed base material Enter the 18-inch rubber mixing machine and knead for 4 to 6 minutes, which will cause a contradiction in processing technology. The mixing time of 4 to 6 minutes cannot fully mix the silicone rubber and the vulcanizing agent. If the mixing time is increased , Due to the heat generated by the friction between the roller and the rubber, the surface of the silicone rubber is pre-vulcanized, resulting in uneven vulcanization of the cable during the extrusion process, which affects the tear strength of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/06B29B7/00
Inventor 姜绪宏贾超张小平张明月刘美法姜茂盛
Owner 安徽宏源特种电缆集团有限公司