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Silicone tube with large inside diameter in lock pin and preparation method

A technology of large inner diameter and silicone tube, which is applied in the field of lock pin large inner diameter silicone tube and its preparation, can solve the problem of low working efficiency of silicone tube and achieve the effect of improving production efficiency

Active Publication Date: 2006-04-19
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to solve the deficiencies of existing rubber materials in high temperature resistance and hose burst pressure performance, and at the same time, in order to solve the problem of low work efficiency of hand-made silicone tubes, it is proposed to use extrusion technology to make lock pins Silicone tube with large inner diameter and preparation method

Method used

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  • Silicone tube with large inside diameter in lock pin and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] produce a figure 1 The shown silicone rubber tube with an inner diameter of 50±0.5mm×5±0.5mm×200±3mm, the steps are as follows figure 2 Shown below:

[0022] Firstly, the qualified raw rubber and auxiliary materials are mixed and extruded on the extruder. The extrusion temperature is set at 40±5℃, 30±5℃, 30±5℃, 30±5℃, Each section is at this temperature, and the rubber is re-milled and extruded.

[0023] Reinforcement layer: We decided to choose NORMAX (aramid 2200D), and chose the lock needle structure in knitting. The purpose is to improve the blasting strength of the silicone tube. The speed of the tractor is 3.5±0.5m / min; 10 turns.

[0024] Extrusion cover:

[0025] Select the appropriate needle and mouth shape for extruding the outer rubber, set the extrusion temperature to 40±5°C, 30±5°C, 30±5°C, 30±5°C, and set the temperature for each section of the extruder. The rubber material is re-milled, extruded, and the thickness of the extruded hose is determined a...

Embodiment 2

[0033] Production inner diameter is the silicon rubber tube of 60 ± 1mm ​​* 5 ± 0.5mm * 200 ± 3mm, method step is as shown in embodiment 1, difference is:

[0034] Set the extrusion temperature to 25±5°C, 20±5°C, 20±5°C, 20±5°C, and each section of the extruder is at this temperature, and the rubber is re-milled and extruded.

[0035] The speed of the tractor is 3±0.5m / min; the number of revolutions of the braiding machine is 135±10 revolutions.

[0036] For extruding the needle and mouth shape of the outer rubber, set the extrusion temperature at 25±5°C, 20±5°C, 20±5°C, 20±5°C. Refining, extrusion, and the thickness of the extruded hose are determined according to the wall thickness required by the overall hose.

[0037] One-stage vulcanization: the temperature is 180°C, the time is 5 minutes, and then the secondary vulcanization molding is carried out in an oven, the second-stage vulcanization: the temperature is 200°C, the time is 1H, and then the product can be obtained a...

Embodiment 3

[0039] The production inner diameter is the silicone rubber tube of 30 ± 1mm ​​× 5 ± 0.5mm × 200 ± 3mm, the method steps are as shown in embodiment 1, the difference is:

[0040] Set the extrusion temperature to 45±5°C, 35±5°C, 35±5°C, 35±5°C, and each section of the extruder is at this temperature, and the rubber material is kneaded back and extruded.

[0041] The speed of the tractor is 5±0.5m / min; the number of revolutions of the braiding machine is 165±10 revolutions.

[0042] For extruding the needle and mouth shape of the outer rubber, set the extrusion temperature to 45±5°C, 35±5°C, 35±5°C, 35±5°C. Refining, extrusion, and the thickness of the extruded hose are determined according to the wall thickness required by the overall hose.

[0043] One-stage vulcanization: the temperature is 120°C, the time is 30 minutes, and then the secondary vulcanization molding is carried out in an oven; the second-stage vulcanization: the temperature is 150°C, the time is 4H, and then t...

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Abstract

A silicone rubber pipe with great internal diameter and locking needle structure is composed of internal silicone rubber layer, reinforcing layer with locking needle structure and external silicone rubber layer. Its preparing process includes such steps as preparing pipe blank through extruding out and weaving, and sulfurizing. Its advantages are high adhesion between layers and high pressure tolerance (more than 0.4 MPa).

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to a lock pin large inner diameter silicone hose and a preparation method thereof. technical background [0002] Among all rubbers, silica gel has the widest working temperature range (-50~250°C), and has excellent ozone aging resistance, oxygen aging resistance, light aging resistance and weather aging resistance. Due to these advantages, silica gel is superior to other rubber phases than has a higher value. [0003] The application of silicone rubber in the automotive industry is growing very fast. The reason is that with the increase of automobile horsepower, strict exhaust regulations, the increase of engine rotation temperature and the use temperature of various components, the use temperature is required to be at -50°C ~250°C, the performance of the original rubber hose can no longer meet the performance requirements of the car itself. Howe...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B25/02B29C47/06B29C35/02
Inventor 张洪起李风海黄英薛俊芳张学振
Owner TIANJIN PENGYI GRP CO LTD
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