CN1307249C - Automobile synchronous belt and its manufacturing method - Google Patents

Abstract

The present invention discloses an automobile synchronous belt and a manufacturing method thereof, which relates to a transmission belt and a manufacturing method thereof for automobiles, and more specifically an automobile synchronous belt and a manufacturing method thereof. The automobile synchronous belt is composed of a fabric sleeve, an NGF thread rope and a rubber sheet at the outer layer, wherein the rubber sheet is formed from GRT neoprene, MgO, 3-polybutadiene rubber, coumarone, ZnO, an ODA anti-ageing agent, DLE-W, stearic acid, carbon black, NA-22 and antioxidant A through compounding and calendering; the manufacturing method is characterized in that rubber sheet compounding is firstly carried out, a mixed material is calendered for producing sheets, and the fabric sleeve, the thread rope and rubber sheets are compounded on a mould for molding; water pressure is led to the outer cavity of the mould, and steam is filled into the inner cavity for sulfuration; a product is obtained through back milling and cutting. The synchronous belt has the advantages of ageing resistance, abrasion resistance, height resistance, low temperature, wide applicable temperate zone, small volume expansion after oil degradation and high fracture strength of 678 KN/M in the condition of high temperature; because the manufacturing method adopts a hydraulic vulcanizing method, early over vulcanization of rubber is prevented, and the density of the synchronous belt is increased.

Description

Automobile synchronous belt and manufacture method thereof

Technical field the present invention relates to transmission belt used on a kind of automobile and manufacture method thereof, is specially automobile synchronous belt and manufacture method thereof.

The background technology automobile synchronous belt is the transmission belt that a kind of working face has dentalation, and its collection gear, chain and band transmission are one, has the transmission efficiency height, transmitting ratio is accurate, noise is little, advantage such as energy-conservation, easy to maintenance.Band is made up of cloth cover, NGF cotton rope and outer field film synchronously, and the performance of outer film has direct influence to the performance of synchronous band.Therefore how to select the prescription and the manufacture method of film particularly necessary.

" a kind of rubber automobile is band and manufacture method thereof synchronously " (number of patent application 03132099.6), it selects for use high-tension elastic nylon cloth as being with flank of tooth infantees synchronously, rubber adopts hydrogenated nitrile-butadiene rubber, and is equipped with zinc oxide, stearic acid, protective agent, carbon black, tenderizer, sulphur and promotor.Manufacture method is earlier elastic nylon cloth to be carried out surface treatment, carries out the rubber melting, melting divides two sections to carry out, and rolling out film, film thickness be at 0.60-0.70mm, again through moulding, sulfuration, the demoulding, grinding, cutting processing, and check, packing warehouse-in then.

Summary of the invention purpose of the present invention aims to provide a kind of ageing resistance, high thermal resistance, behind the oil degradation volumetric expansion little, automobile synchronous belt that breaking strength is high and manufacture method thereof.

The implementation of the object of the invention is, automobile synchronous belt is made up of cloth cover, NGF cotton rope and outer field film, and film is formed through mixing, calendering by following ingredients, and concrete weight proportion is as follows:

GRT chloroprene rubber 95-105 MgO 3.5-4.5

Cis-1,4-polybutadiene rubber 2.5-3 coumarone 4.5-5.5

ZnO 2.5-3.5 ODA anti-aging agent 2.5-3.5

BLE-W 1-1.5 stearic acid 1-1.5

Carbon black 48-52 NA-22 0.2-0.3

Antioxidant A 1-1.3

The manufacture method of automobile synchronous belt, concrete steps are as follows:

A, film batching, by weight ratio, get the MgO of 3.5-4.5 earlier, to the carbon black that wherein adds 48-52, add the ODA anti-aging agent of 2.5-3.5, the NA-22 stearic acid of 1-1.5BLE-W, 0.2-0.3 again, the coumarone that adds antioxidant A, the 4.5-5.5 of ZnO, the 1-1.3 of 2.5-3.5 at last mixes the back and adds in the cis-1,4-polybutadiene rubber of GRT chloroprene rubber, 2.5-3 of 95-105

B, calendering: be that blended compound is rolled film-making, the calendering gauge control is at 0.5-1.0mm,

C, moulding are compounded in cloth cover and cotton rope and film on the mould,

D, sulfuration are pressed the water flowing of mould exocoel, and inner chamber leads to steam, hydraulic pressure 1-2Mpa, and vapor temperature is 153 ± 10 ℃ of sulfurations 35 minutes,

E, the mill back of the body are polished to the band tube after the sulfuration, and making tape thickness is 2.2mm.

Synchronously band ageing resistance, wear resistance, high-and low-temperature resistance are good for this, and it is wide to be suitable for the temperate zone, behind the oil degradation volumetric expansion little, breaking strength is issued to 678KN/m in hot conditions.Adopt hydraulic pressure sulfuration method in the manufacture method, prevent the early stage over cure of rubber, increased the density of synchronous band.

Embodiment automobile synchronous belt of the present invention is made up of cloth cover, NGF cotton rope and outer field film, and film is formed through mixing, calendering by GRT chloroprene rubber, MgO, cis-1,4-polybutadiene rubber, coumarone, ZnO, ODA anti-aging agent, BLE-W, stearic acid, carbon black, NA-22, antioxidant A.

Film scientific formulation of the present invention is reasonable, wherein the GRT chloroprene rubber is a main rubber, MgO, ZnO, stearic acid are vulcanizing agent, guarantee that the rubber polymer is interrupted the link again later on of other material of link, it is the important materials of modified rubber, cis-1,4-polybutadiene rubber is low temperature resistant additive, guarantee the resistance to low temperature of product, coumarone is a dispersion agent, guarantees various materials energy homodisperse, NA-22 is a promotor, can promote rubber cross, DA, antioxidant A, BLE-W are anti-aging agent, also are the high temperature resistance agent, carbon black is a strengthening agent, makes the film stretch breaking strength improve 10%-20%.

The scientific and reasonable proportioning of the present invention has improved the high temperature resistant degree of film, has widened working conditions the work-ing life that prevent ageing of rubber, has prolonged synchronous band simultaneously.

Manufacture method is to carry out the film batching earlier, and compound rolls film-making, and guaranteeing has various effects differences, the different material of thickness in the different stressed position of adhesive tape.Cloth cover and cotton rope and film are compounded in moulding on the mould, the water flowing of mould exocoel is pressed, the logical steam of inner chamber vulcanizes, hydraulic pressure 1-2Mpa, and vapor temperature is 153 ± 10 ℃ of sulfurations 35 minutes.Impel it to produce chemical reaction and by the type shape setting of mould.Vulcanization process is the key link in the manufacture method, it has changed traditional steam vulcanization method, and adopt the hydraulic pressure sulfuration to guarantee under the situation of homo(io)thermism, hydraulic pressure is adjustable, to guarantee the brute force and the wear resistance of rubber, has avoided that sulfide stress is directly proportional with temperature in the traditional method, cause not enough this inherent defect of early stage over cure of rubber or density, guaranteed the integrated bond of film, cotton rope and cloth inner room, made each stress layer one integrated mass of film, thereby increased work-ing life.

Table 1 is listed formulation Example of the present invention

Table 1

Composition	Weight proportion
				1	2	3
	The GRT chloroprene rubber	95	98				105
MgO				4.5	3.5	4.2
	Cis-1,4-polybutadiene rubber	2.8	2.5				3
ZnO				2.5	3.0	3.5
	ODA	3.5	2.5				3.2
BLE-W				1.5	1.0	1.2
	Stearic acid	1.5	1.1				1.3
Carbon black				51	48	52
	NA-22	0.3	0.2				0.28
Antioxidant A				1	1.1	1.3

The applicant entrusts national car mass supervision and inspection center that this is with synchronously and has done detection, and detected result sees Table 2:

Table 2

Sequence number	Interventions Requested		Standard-required	Assay	Meet judgement
						1	Supply of material state	Shao Er hardness (HA)	75±5	72	Meet
Tensile strength at yield (Mpa)	≥15	18	Meet
				Elongation at break (%)	≥300			410	Meet
2	Behind the heat-proof aging	Shao Er hardness (HA)	≤85							78	Meet
				Tensile strength at yield reduced rate (%)	≤10	9	Meet
		Elongation at break reduced rate (%)	≤35					34	Meet
				3	After high temperature resistant	Shao Er hardness (HA)	≤90			84	Meet
Tensile strength at yield reduced rate (%)	≤25	24	Meet
						Elongation at break reduced rate (%)	≤75	66	Meet
4	After oil resistant is aging	Shao Er hardness (HA)	≥35							58	Meet
				Tensile strength at yield reduced rate (%)	≤60	47	Meet
		Elongation at break reduced rate (%)	≤40					27	Meet
				Volume increases (%)	≤80	42	Meet

Claims (2)

1, automobile synchronous belt is characterized in that being made up of cloth cover, NGF cotton rope and outer field film, and film is formed through mixing, calendering by following ingredients, and the concrete weight proportion of film is as follows:

GRT chloroprene rubber 95-105 MgO 3.5-4.5

Cis-1,4-polybutadiene rubber 2.5-3 coumarone 4.5-5.5

ZnO 2.5-3.5 ODA anti-aging agent 2.5-3.5

BLE-W 1-1.5 stearic acid 1-1.5

Carbon black 48-52 NA-22 0.2-0.3

Antioxidant A 1-1.3.

2, the manufacture method of the described automobile synchronous belt of claim 1 is characterized in that concrete steps are as follows:

A, film batching, by weight ratio, get the MgO of 3.5-4.5 earlier, to the carbon black that wherein adds 48-52, add the ODA anti-aging agent of 2.5-3.5, the NA-22 stearic acid of 1-1.5BLE-W, 0.2-0.3 again, the coumarone that adds antioxidant A, the 4.5-5.5 of ZnO, the 1-1.3 of 2.5-3.5 at last mixes the back and adds in the cis-1,4-polybutadiene rubber of GRT chloroprene rubber, 2.5-3 of 95-105

B, calendering: be that blended compound is rolled film-making, the calendering gauge control is at 0.5-1.0mm,

C, moulding are compounded in cloth cover and cotton rope and film on the mould,

D, sulfuration are pressed the water flowing of mould exocoel, and inner chamber leads to steam, hydraulic pressure 1-2Mpa, and vapor temperature is 153 ± 10 ℃, vulcanized 35 minutes,

E, the mill back of the body are polished to the band tube after the sulfuration, and making tape thickness is 2.2mm.