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New rubber riding wheel and fabricating process thereof

A rubber and roller technology, applied in the direction of shaft and bearing, can solve the problems of molecular chain breakage, wear and tear, thermal oxidation on the surface of rubber products, etc., to facilitate maintenance, installation and replacement operations, prolong working life, improve The effect of product hardness

Active Publication Date: 2009-11-25
JIHUA 3517 RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of domestic urban infrastructure construction, the consumption of nodular cast pipes is increasing day by day, and the quality requirements and technical reference index requirements for the auxiliary parts of the production of cast pipe coating processes - rubber product supporting wheels are also getting higher and higher. However, the quality of the current rubber support rollers cannot meet the needs of cast pipe production, and there are a series of quality problems such as wear and tear, and short service life. The main problems are: 1. The formula design is unreasonable
The rubber formula design of the original product adopts the general conventional vulcanization system, which is not suitable for the large-scale production of cast pipes. There are rubber products with shallow vulcanization depth and low hardness, which are easy to deform when subjected to working pressure. The disulfide bonds in the rubber network structure account for the majority. When the rubber supporting wheel is subjected to high temperature, high pressure, and high-speed rotation, the sulfur-containing double bonds in the rubber molecules are easily oxidized by heat, resulting in molecular chain breakage, aging phenomena, and wear and tear.
2. Defects in vulcanization process of rubber products
The high temperature and long-term vulcanization process will easily cause thermal oxidation on the surface of rubber products, and the phenomenon of "over-sulfurization" will occur, resulting in wear and collapse.
3. Extensive operation methods of vulcanization process
The operation method of putting glue into the mold and directly vulcanizing will easily make the surface density of the product poor, form the phenomenon of surface "flow marks", and form wear and tear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) First, 40kg of natural rubber NR and 10kg of synthetic rubber SBR were mixed, masticated, and thinned on an open mill to control the plasticity of the raw rubber to 0.44;

[0022] 2) Then put the above-mentioned raw rubber into the internal mixer, and after pressing for 3 minutes, lift the upper bolt of the internal mixer and add 0.6kg of accelerator CZ, 0.75kg of accelerator DM, 2.5kg of stearic acid, 7.5kg of zinc oxide, 0.5kg of kg anti-aging agent 4010NA, 0.75 kg anti-aging agent RD, 4 kg ancient Marron resin and 2.5 kg tert-butylphenolic resin, put down the top bolt and press for 4 minutes, then lift the top bolt and add 30 kg of high wear-resistant carbon black N330, 25 kg of general-purpose carbon Black N660, 5kg engine oil and 0.5kg paraffin, after the load is lifted, add 0.4kg sulfur within 60 seconds and mix, then immediately open the lower top bolt of the internal mixer to discharge, and knead evenly on the large flat machine, then slice , cooling, mixing ...

Embodiment 2

[0030] 1) First, 80kg of natural rubber NR and 20kg of synthetic rubber SBR were mixed, masticated and thinned on an open mill to control the plasticity of the raw rubber to 0.44;

[0031] 2) Then put the above-mentioned raw rubber into the internal mixer, and after 4 minutes of pressing, lift the upper bolt of the internal mixer and add 1.2kg of accelerator CZ, 1.5kg of accelerator DM, 5kg of stearic acid, 15kg of zinc oxide, and 1kg of anti-aging agent 4010NA, 1.5kg anti-aging agent RD, 8kg coomalon resin and 5kg tert-butylphenolic resin, put down the top bolt and press for 5 minutes, then lift the top bolt and add 60kg high wear-resistant carbon black N330, 50kg general carbon black N660, 10kg Engine oil and 1kg of paraffin, after the load is lifted, add 0.8kg of sulfur within 60 seconds and mix, then immediately open the lower top bolt of the internal mixer to discharge, and evenly knead on a large flat machine, slice, cool, and knead The plasticity is controlled at 0.45; ...

Embodiment 3

[0039] 1) First, mix 160kg of natural rubber NR and 40kg of synthetic rubber SBR on an open mill, masticate, thin pass, and control the plasticity of raw rubber at 0.45;

[0040] 2) Then put the above-mentioned raw rubber into the internal mixer, and after 5 minutes of pressing, lift the upper bolt of the internal mixer and add 2.4kg of accelerator CZ, 3kg of accelerator DM, 10kg of stearic acid, 30kg of zinc oxide, 2kg of anti-aging agent 4010NA , 3kg anti-aging agent RD, 16kg Coomalon resin and 10kg tert-butylphenolic resin, put down the top bolt and press for 6 minutes, then lift the top bolt and add 120kg high wear-resistant carbon black N330, 100kg general carbon black N660, 20kg engine oil and 2kg of paraffin wax, after pressing the load, add 1.6kg of sulfur within 60 seconds after mixing, immediately open the lower top bolt of the internal mixer to discharge, and after evenly kneading on the large flat machine, slice, cool, and control the plasticity of mixing at 0.5; ...

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Abstract

The invention relates to a new rubber riding wheel and fabricating process thereof. The fabricating process of the invention comprises steps of: 1) first mixing, masticating and thinning natural rubber NR and synthetic rubber SBR on an open mill, controlling plasticity of rubber at 0.44 to 0.45; 2) casting the rubber to a mixer, injecting for 3min to 5min, adding accelerator, octadecoic acid, zinc oxide, antiager, coumarone resin and tert-butyl phenolic resin in sequence, injecting for 4min to 6min, adding carbon black, machine oil and paraffin, after pressurizing load, adding sulfur within 60s to mix, discharging immediately and making pieces, cooling after turning evenly on a flat-bed machine, controlling mixing plasticity of rubber at 0.4 to 0.5; 3) casting mixed rubber material to the open mill to warm, then coiling or making pieces, supplying the same to a squeezer to squeeze, distributing pieces and weighing the rubber material according to product requirements for spare use; 4) packing weighed rubber material to a die cavity to enter a flat vulcanizing machine; pressurizing to vulcanize by using low temperature in grads gradually; 5) completing vulcanization.

Description

technical field [0001] The invention relates to a rubber supporting wheel for auxiliary parts used in the production of nodular cast pipe enterprises, in particular to a new type of rubber supporting wheel and its manufacturing process. Background technique [0002] With the rapid development of domestic urban infrastructure construction, the consumption of nodular cast pipes is increasing day by day, and the quality requirements and technical reference index requirements for the auxiliary parts of the production of cast pipe coating processes - rubber product supporting wheels are also getting higher and higher. However, the quality of the current rubber support rollers cannot meet the needs of cast pipe production, and there are a series of quality problems such as wear and tear, and short service life. The main problems are: 1. The formula design is unreasonable. The rubber formula design of the original product adopts the general conventional vulcanization system, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C13/00C08L7/00C08L9/06C08K13/02C08K3/06C08K5/47B29B7/28B29C35/02
Inventor 肖华智蒋绮云郭金耀李颖肖伟
Owner JIHUA 3517 RUBBER PROD
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