阅读说明：本技术 一种耐磨耐寒抗冲击的橡胶筛板及其制造方法 (Wear-resistant cold-resistant impact-resistant rubber sieve plate and manufacturing method thereof ) 是由 宋鑫 宋长江 王巍 魏雪梅 李朝红 周震宇 汪健 袁陆海 于 2019-11-16 设计创作，主要内容包括：本发明公开了一种耐磨耐寒抗冲击的橡胶筛板及其制造方法。本发明选择天然橡胶/丁苯橡胶/顺丁橡胶为主体材料,N234炭黑为补强剂,添加CMoSSi耐磨剂,通过优化配方和工艺,制备的耐磨耐寒抗冲击的橡胶复合材料作为橡胶筛板的覆盖层,橡胶筛板具有优异的耐磨性能和抗冲击性能,且在低温和冲击载荷条件下,仍具有优良的力学性能和较长使用寿命,满足橡胶筛板在低温环境下的使用要求,工艺简单,易于制造。(The invention discloses a wear-resistant cold-resistant impact-resistant rubber sieve plate and a manufacturing method thereof. The natural rubber/styrene butadiene rubber/butadiene rubber is selected as a main material, N234 carbon black is used as a reinforcing agent, a CMoSSI wear-resistant agent is added, the formula and the process are optimized, and the prepared wear-resistant, cold-resistant and impact-resistant rubber composite material is used as a covering layer of the rubber sieve plate.)

1. the utility model provides a wear-resisting cold-resistant rubber sieve that shocks resistance, includes nylon gumming cord fabric casing layer, nylon gumming cord fabric rubberizing layer, upper covering glue film, lower covering glue film and sieve mesh, its characterized in that, upper covering glue film, lower covering glue film constitute by following component according to the weight ratio:

20-30 parts of natural rubber NR, 150020-30 parts of styrene butadiene rubber SBR, 900050 parts of butadiene rubber, 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 1.5-2.0 parts of sulfur, 1.5-2.0 parts of an accelerator, 2-3 parts of an anti-aging agent, 1-2 parts of a protective wax, 0.5-1 part of a scorch retarder CTP, 50-60 parts of carbon black N23450, 4-6 parts of a CMoSSI wear-resistant agent, 4-6 parts of coumarone resin and 2-4 parts of aromatic oil.

2. The wear-resistant cold-resistant impact-resistant rubber screen plate as claimed in claim 1, wherein: the promoter is a combination of a promoter CZ and a promoter TMTD.

3. The wear-resistant cold-resistant impact-resistant rubber screen plate as claimed in claim 1, wherein: the anti-aging agent is a combination of an anti-aging agent RD and an anti-aging agent 4020.

4. The wear-resistant cold-resistant impact-resistant rubber screen plate as claimed in claim 1, wherein: the CMoSSI wear-resistant agent is a composition of graphite powder with the fineness of 1000 meshes, molybdenum disulfide with the fineness of 1000 meshes and a Si69 silane coupling agent, and the mass ratio of the three components is 75%/23%/2%.

5. The wear-resistant cold-resistant impact-resistant rubber screen plate as claimed in claim 1, wherein: the framework layer of the nylon impregnated cord fabric is formed by overlapping 1-3 layers of rubberized nylon impregnated cord fabrics, and the nylon impregnated cord fabric is selected from 2100dtex/2 type and 1400dtex/3 type nylon 6 or nylon 66 impregnated cord fabric.

6. The method for preparing the wear-resistant cold-resistant impact-resistant rubber sieve plate as claimed in claim 1, which is characterized by comprising the following steps:

(1) preparing an upper covering layer sizing material and a lower covering layer sizing material:

the sizing materials of the upper and lower covering glue layers comprise the following components in percentage by weight:

20-30 parts of Natural Rubber (NR), 20-30 parts of styrene-butadiene rubber (SBR 1500), 50 parts of butadiene rubber (BR 9000), 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 1.5-2.0 parts of sulfur, 1.5-2.0 parts of an accelerator, 2-3 parts of an anti-aging agent, 1-2 parts of protective wax, 0.5-1 part of a scorch retarder CTP, 50-60 parts of carbon black (N234), 4-6 parts of a CMoSSI wear-resistant agent, 4-6 parts of coumarone resin and 2-4 parts of aromatic oil;

preparing the mixture into a two-stage rubber compound of an upper covering layer rubber compound and a lower covering layer rubber compound:

1) plasticating natural rubber:

plasticating the natural rubber by using an internal mixer, wherein the rotor speed of the internal mixer is 40 r/min, the plasticating time is 180-;

2) preparing a CmoSSI wear-resistant agent:

putting graphite powder with the fineness of 1000 meshes and molybdenum disulfide with the fineness of 1000 meshes into a kneader, heating and stirring at the stirring speed of 350-400 r/min, heating to 40-60 ℃, spraying a Si69 silane coupling agent, continuously heating and stirring, and stirring at the temperature of 110-120 ℃ for 10-15 min to prepare the CMoSSI wear-resistant agent, wherein the mass ratio of the graphite powder/the molybdenum disulfide/the Si69 in the CMoSSI wear-resistant agent is 75%/23%/2%;

3) first-stage mixing:

firstly, plasticated natural rubber, styrene butadiene rubber and butadiene rubber are put into an internal mixer for mixing for 40-50 seconds, 50% of carbon black, CMoSSI wear-resistant agent and aromatic oil are put into the internal mixer, mixing is continued for 180 seconds after 150-fold addition of materials, then zinc oxide, stearic acid, anti-aging agent, protective wax, 50% of carbon black and coumarone resin are put into the internal mixer for 180 seconds after 150-fold addition of materials, the rubber discharge temperature is 140-fold addition of materials at 150 ℃, sheets are taken out and cooled, a section of mixed rubber is prepared, and the mixed rubber is used after being placed for 8 hours;

4) and (3) second-stage mixing:

an internal mixer is used in the second-stage mixing, the rotor speed of the internal mixer is 20 r/min, the first-stage mixed rubber, sulfur, an accelerant and an anti-scorching agent are put into the internal mixer for mixing for 100 and 120 seconds, the rubber discharge temperature is 90-100 ℃, the rubber is discharged and cooled, the second-stage mixed rubber of the rubber materials of the upper and lower covering layers is prepared, and the second-stage mixed rubber is used after being placed for 8 hours;

(2) preparing a nylon impregnated cord fabric adhesive layer sizing material;

(3) rubberizing the nylon dipped cord fabric;

(4) rolling out the sheet;

(5) forming a plate blank;

(6) vulcanizing a flat plate;

(7) scribing;

(8) cutting;

(9) punching;

(10) and (6) assembling.

Technical Field

The invention relates to the technical field of industrial and mineral rubber products, in particular to a wear-resistant cold-resistant impact-resistant rubber lining plate and a manufacturing method thereof.

Background

The rubber sieve plate used in the industries of metallurgy, building materials, mines, hydropower, coal dressing and the like is required to have the characteristics of high wear resistance, impact resistance, good low-temperature resistance and the like due to the severe working environment and large impact load. Particularly, in mines and open pit mines in northeast and northwest areas of China, the low temperature in a severe cold period is below-50 ℃, the rubber sieve plate in the prior art is hardened and embrittled when used at the environmental temperature, the mechanical property is seriously reduced, the service life is short under the condition of impact load, and even the service performance is lost. In the prior art, researches on improving the wear resistance and the impact resistance of the rubber sieve plate under normal temperature and high temperature conditions are more, but researches on how to improve the mechanical property and the service life of the rubber sieve plate under low temperature and impact load conditions are less.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a wear-resistant, cold-resistant and impact-resistant rubber sieve plate which has excellent wear resistance and impact resistance, still has good mechanical properties and long service life under the conditions of low temperature and impact load, and meets the use requirements of rubber sieve plates in the industries of metallurgy, building materials, mines, hydropower, coal dressing and the like.

The second purpose of the invention is to provide a preparation method of the rubber sieve plate, which has simple process and easy manufacture.

The purpose of the invention is realized by the following scheme:

the wear-resistant cold-resistant impact-resistant rubber sieve plate comprises a nylon impregnated cord fabric framework layer, a nylon impregnated cord fabric adhesive layer, an upper covering adhesive layer, a lower covering adhesive layer and sieve pores, and is characterized in that the upper covering adhesive layer and the lower covering adhesive layer consist of the following components in percentage by weight:

20-30 parts of Natural Rubber (NR), 20-30 parts of styrene butadiene rubber (SBR 1500), 50 parts of butadiene rubber (BR 9000), 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 1.5-2.0 parts of sulfur, 1.5-2.0 parts of an accelerator, 2-3 parts of an anti-aging agent, 1-2 parts of protective wax, 0.5-1 part of a scorch retarder CTP, 50-60 parts of carbon black (N234), 4-6 parts of a CMoSSI wear resistant agent, 4-6 parts of coumarone resin and 2-4 parts of aromatic oil.

The promoter is a combination of a promoter CZ and a promoter TMTD, and the anti-aging agent is a combination of an anti-aging agent RD and an anti-aging agent 4020.

The CMoSSI wear-resistant agent is a composition of graphite powder with the fineness of 1000 meshes, molybdenum disulfide with the fineness of 1000 meshes and a Si69 silane coupling agent, and the mass ratio of the three components is 75%/23%/2%.

The framework layer of the nylon impregnated cord fabric is formed by overlapping 1-3 layers of nylon impregnated cord fabrics which are adhered with glue, and the nylon impregnated cord fabrics can be selected from 2100dtex/2 type and 1400dtex/3 type nylon 6 or nylon 66 impregnated cord fabrics.

The thickness of the rubber sieve plate is 7.5-30mm, and the thickness ratio of the upper covering rubber layer to the lower covering rubber layer is 2: 1.

The sieve pores can be square, strip, round or oval.

The manufacturing method of the wear-resistant cold-resistant impact-resistant rubber sieve plate comprises the following steps:

(1) preparing an upper covering layer sizing material and a lower covering layer sizing material:

the sizing materials of the upper and lower covering glue layers comprise the following components in percentage by weight:

20-30 parts of Natural Rubber (NR), 20-30 parts of styrene-butadiene rubber (SBR 1500), 50 parts of butadiene rubber (BR 9000), 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 1.5-2.0 parts of sulfur, 1.5-2.0 parts of an accelerator, 2-3 parts of an anti-aging agent, 1-2 parts of protective wax, 0.5-1 part of a scorch retarder CTP, 50-60 parts of carbon black (N234), 4-6 parts of a CMoSSI wear-resistant agent, 4-6 parts of coumarone resin and 2-4 parts of aromatic oil;

preparing the mixture into a two-stage rubber compound of an upper covering layer rubber compound and a lower covering layer rubber compound:

1) plasticating natural rubber:

plasticating the natural rubber by using an internal mixer, wherein the rotor speed of the internal mixer is 40 r/min, the plasticating time is 180-;

2) preparing a CmoSSI wear-resistant agent:

putting graphite powder with the fineness of 1000 meshes and molybdenum disulfide with the fineness of 1000 meshes into a kneader, heating and stirring at the stirring speed of 350-400 r/min, heating to 40-60 ℃, spraying a Si69 silane coupling agent, continuously heating and stirring, and stirring at the temperature of 110-120 ℃ for 10-15 min to prepare the CMoSSI wear-resistant agent, wherein the mass ratio of the graphite powder/the molybdenum disulfide/the Si69 in the CMoSSI wear-resistant agent is 75%/23%/2%;

3) first-stage mixing:

firstly, plasticated natural rubber, styrene butadiene rubber and butadiene rubber are put into an internal mixer for mixing for 40-50 seconds, carbon black (50%), a CMoSSI wear-resistant agent and aromatic oil are put into the internal mixer, mixing is continued for 150-180 seconds, then zinc oxide, stearic acid, an anti-aging agent, protective wax, carbon black (50%), coumarone resin are put into the internal mixer for further mixing for 150-180 seconds, the rubber discharge temperature is 140-150 ℃, sheets are taken out and cooled, a section of mixed rubber is prepared, and the mixed rubber is used after being placed for 8 hours;

4) and (3) second-stage mixing:

an internal mixer is used in the second-stage mixing, the rotor speed of the internal mixer is 20 r/min, the first-stage mixed rubber, sulfur, an accelerant and an anti-scorching agent are put into the internal mixer for mixing for 100 and 120 seconds, the rubber discharge temperature is 90-100 ℃, the rubber is discharged and cooled, the second-stage mixed rubber of the rubber materials of the upper and lower covering layers is prepared, and the second-stage mixed rubber is used after being placed for 8 hours;

(2) preparing a glue layer adhesive material of the nylon impregnated cord fabric:

the nylon impregnated cord fabric rubberizing layer sizing material selects a common fabric core conveying belt canvas rubberizing layer sizing material;

(3) rubberizing nylon impregnated cord fabric:

hot-pasting the nylon impregnated cord fabric with a glue layer by layer according to the thickness required by the process on the upper and lower surfaces of the nylon impregnated cord fabric by a cold feed extruder and a four-roll calender;

(4) rolling out a sheet:

preparing upper and lower cover layer rubber sheets from the upper and lower cover layer rubber materials according to the thickness required by the process by using a cold feed extruder and a four-roll calender;

(5) and (3) slab forming:

firstly, sticking rubberized cord fabrics together according to the number of layers required by the process by a forming machine, then sticking the rubberized cord fabrics with upper and lower covering layer films, and performing cold pressing to prepare a plate blank;

(6) plate vulcanization:

vulcanizing the plate blank by a vulcanizing press according to the pressure, temperature and time required by the process;

(7) scribing:

marking a line on the plate blank according to the drawing size requirement;

(8) cutting:

cutting the plate blank into the size required by the drawing according to the marking lines;

(9) punching:

inputting technical parameters of the sieve plate into a computer, and automatically punching holes on the plate blank by an automatic punching machine;

(10) assembling:

the tensioning hook, the fixed flat iron and the fixing screw are assembled with the punched rubber sieve plate through an automatic assembling machine, and the rubber sieve plate is the wear-resistant, cold-resistant and impact-resistant rubber sieve plate.

Compared with the prior art, the invention has the following beneficial effects:

the natural rubber/styrene butadiene rubber/butadiene rubber is selected as a main material, N234 carbon black is used as a reinforcing agent, a CMoSSI wear-resistant agent is added, the formula and the process are optimized, and the prepared wear-resistant, cold-resistant and impact-resistant rubber composite material is used as a covering layer of the rubber sieve plate.

Detailed Description

The following examples are given to aid in the understanding of the invention, but are not intended to limit the scope of the invention.