阅读说明：本技术 一种用于汽车减震的橡胶减震垫及其制备工艺 (Rubber shock pad for automobile shock absorption and preparation process thereof ) 是由 不公告发明人 于 2021-02-01 设计创作，主要内容包括：本发明公开了一种用于汽车减震的橡胶减震垫及其制备工艺,其原料按重量份具体包括：天然橡胶68-80份、辅助橡胶15-20份、填料30-40份、添加剂4-6份、硬脂酸1-2份、防老剂1-2份、促进剂1-2份和偶联剂3-5份。该用于汽车减震的橡胶减震垫,通过在橡胶减震垫的原料中添加辅助橡胶,其中辅助橡胶采用苯乙烯和顺丁橡胶以及丁腈橡胶之间及进行接枝反应,通过苯乙烯接枝顺丁橡胶以及丁腈橡胶是由边缘向内部进行反应,在足够的反应时间之后,先在外部就形成了完整的壳结构,再渗入顺丁橡胶以及丁腈橡胶粒子内部进行反应,进而有效提高橡胶减震垫力学性能,利用木质素在橡胶中生成刚性网络,从而提升拉伸断面的塑性变形。(The invention discloses a rubber shock pad for automobile shock absorption and a preparation process thereof, wherein the rubber shock pad comprises the following raw materials in parts by weight: 68-80 parts of natural rubber, 15-20 parts of auxiliary rubber, 30-40 parts of filler, 4-6 parts of additive, 1-2 parts of stearic acid, 1-2 parts of anti-aging agent, 1-2 parts of accelerator and 3-5 parts of coupling agent. This a rubber shock pad for automobile shock absorber, through adding supplementary rubber in the raw materials at rubber shock pad, wherein supplementary rubber adopts between styrene and cis-butadiene rubber and the butadiene-acrylonitrile rubber and carries out grafting reaction, through styrene grafting cis-butadiene rubber and butadiene-acrylonitrile rubber are by the edge to inside reaction, after sufficient reaction time, just formed complete shell structure in the outside earlier, permeate inside the reaction of going on of cis-butadiene rubber and butadiene-acrylonitrile rubber particle again, and then effectively improve rubber shock pad mechanical properties, utilize lignin to generate the rigidity network in rubber, thereby promote tensile sectional plastic deformation.)

1. The utility model provides a rubber shock pad for automobile shock absorber which characterized in that: the raw materials specifically comprise the following components in parts by weight: 68-80 parts of natural rubber, 15-20 parts of auxiliary rubber, 30-40 parts of filler, 4-6 parts of additive, 1-2 parts of stearic acid, 1-2 parts of anti-aging agent, 1-2 parts of accelerator and 3-5 parts of coupling agent;

the rubber shock pad for automobile shock absorption is prepared by the following method:

firstly, cleaning the surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

putting the rubber base material into pretreatment equipment, putting the rubber base material into a feeding hopper (5), respectively feeding the rubber base material into five material conveying glass tubes (7) through a feeding pipe (3), starting a UV light source (6) and an annular electric heating tube (8), irradiating the five material conveying glass tubes (7) by using ultraviolet rays generated by the UV light source (6), simultaneously heating the rubber base material in the material conveying glass tubes (7) through the annular electric heating tube (8), setting the conveying time of the rubber base material in the material conveying glass tubes (7) to be 35s, and finally extracting the rubber base material through a discharging pipe (4) to obtain the pretreatment base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, placing the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure at 20-30Mpa and the vulcanization temperature at 110-125 ℃, vulcanizing for 20-30min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

2. The rubber shock pad for automobile shock absorption according to claim 1, wherein: the filler is formed by mixing carbon black N550 and white carbon black according to a mass ratio of 1:0.6, the additive is formed by mixing zinc oxide and magnesium oxide according to a mass ratio of 1:1.2, the anti-aging agent is one of an anti-aging agent RD, an anti-aging agent D and an anti-aging agent MB, the accelerator is one of an accelerator D, an accelerator M and an accelerator PZ, and the coupling agent is KH-590.

3. The rubber shock pad for automobile shock absorption according to claim 1, wherein: in the first step, the natural rubber is crushed to 60 meshes, an open mill is used for plasticating the natural rubber machine for 8 times, in the second step, the initial banburying temperature of the internal mixer is set to be 80 ℃, the rotating speed is 80rpm, the filling coefficient is 0.75, the rubber discharge temperature is 160 ℃, and the open mill is used for sheet discharging, the open mill conditions are set to be that the roll temperature is 40 ℃, the roll distance is 1mm, the roll distance in thin passing is 0.2mm, and the roll distance in sheet discharging is 2 mm.

4. The rubber shock pad for automobile shock absorption according to claim 1, wherein: the auxiliary rubber is prepared by the following method:

step A1, weighing styrene serving as a raw material, introducing the styrene into a four-neck flask, adding sodium dodecyl sulfate into the four-neck flask, then adding distilled water, introducing nitrogen into the four-neck flask, stirring the mixed solution by using a mechanical stirring device, carrying out stirring reaction for 1 hour, then adding potassium persulfate, continuing stirring reaction for 3 hours, and finally carrying out drying treatment by using a vacuum drying device to obtain precursor powder a;

a2, weighing alkali lignin, introducing the alkali lignin into a beaker, adding distilled water into the beaker, uniformly stirring, adding a 1mol/L sodium hydroxide aqueous solution into the beaker until the pH value of the solution in the beaker is 12-13, centrifuging the solution in the beaker to remove precipitated impurities, taking the solution, stirring the solution with a 1mol/L dilute acid solution until the pH value is 2-3, heating in a water bath for 2 hours, carrying out suction filtration, finally washing with distilled water, and carrying out vacuum drying on a filter cake to obtain precursor powder b;

and A3, cleaning the surfaces of the butadiene rubber and the nitrile rubber, putting the butadiene rubber and the nitrile rubber into a grinder for grinding, putting the ground mixed rubber particles into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, adding the precursor powder a and the precursor powder b into the mixed rubber particles, banburying for 5min by an internal mixer, putting the mixture into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain the auxiliary rubber.

5. The rubber shock pad for automobile shock absorption according to claim 4, wherein: in the step A1, the using mass ratio of the styrene to the sodium dodecyl sulfate is 1:0.7, in the step A2, the centrifugal treatment condition is 5000r/min, the centrifugation is 30min, and in the step A3, the mixing mass ratio of the butadiene rubber and the nitrile rubber is 1.2: 1.

6. The rubber shock pad for automobile shock absorption according to claim 1, wherein: the pretreatment device comprises a fixed seat (1) and a charging barrel (2), wherein the fixed seat (1) is provided with two parts, the insides of the two fixed seats (1) are respectively fixedly connected with the two sides of the surface of the charging barrel (2), the left end of the charging barrel (2) is communicated with a feeding pipe (3), the right end of the charging barrel (2) is communicated with a discharging pipe (4), and the left end of the feeding pipe (3) is communicated with a feeding hopper (5).

7. The rubber shock pad for automobile shock absorption according to claim 6, wherein: the inside of feed cylinder (2) is provided with UV light source (6) and defeated material glass pipe (7) respectively, and defeated material glass pipe (7) lie in being provided with five around UV light source (6), five the left end of defeated material glass pipe (7) all communicates with the right-hand member of inlet pipe (3), and the right-hand member of five defeated material glass pipes (7) all communicates with the left end of discharging pipe (4), the inner wall fixedly connected with annular electrothermal tube (8) of feed cylinder (2).

8. A preparation process of a rubber shock pad for automobile shock absorption is characterized by comprising the following steps: the method specifically comprises the following steps:

firstly, cleaning the specific surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

putting the rubber base material into pretreatment equipment, putting the rubber base material into a feeding hopper (5), respectively feeding the rubber base material into five material conveying glass tubes (7) through a feeding pipe (3), starting a UV light source (6) and an annular electric heating tube (8), irradiating the five material conveying glass tubes (7) by using ultraviolet rays generated by the UV light source (6), simultaneously heating the rubber base material in the material conveying glass tubes (7) through the annular electric heating tube (8), setting the conveying time of the rubber base material in the material conveying glass tubes (7) to be 35s, and finally extracting the rubber base material through a discharging pipe (4) to obtain the pretreatment base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, placing the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure at 20-30Mpa and the vulcanization temperature at 110-125 ℃, vulcanizing for 20-30min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

Technical Field

The invention relates to the technical field of rubber shock pads, in particular to a rubber shock pad for automobile shock absorption and a preparation process thereof.

Background

The rubber shock pad product is used for eliminating or reducing the transmission of mechanical shock, achieving shock absorption, noise reduction and damage reduction caused by impact, and has a wide application range, such as elevators, high-speed rails, mechanical equipment, vehicles, ships and the like.

The Chinese patent publication No. CN107746478A is referred to a rubber shock pad and a preparation process thereof, wherein the rubber shock pad comprises the following components in parts by weight: 85-92 parts of natural rubber, 20-25 parts of compounded rubber, 45-55 parts of filler, 3-5 parts of additive, 1-2 parts of vulcanizing agent, 3-5 parts of zinc oxide, 0.5-1 part of stearic acid, 1-2 parts of anti-aging agent, 4-5 parts of high aromatic oil and 1-2 parts of paraffin; the additive is lignin fiber and resin; the existing rubber shock pad has defects in mechanical property, and in order to solve the existing problems, technical personnel in the field provide a rubber shock pad for automobile shock absorption and a preparation process thereof.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a rubber shock pad for automobile shock absorption and a preparation process thereof, wherein auxiliary rubber is added into the raw materials of the rubber shock pad, wherein the auxiliary rubber adopts the grafting reaction between styrene and butadiene rubber and nitrile rubber, the styrene is used for grafting butadiene rubber and nitrile rubber, the reaction is carried out from the edge to the inside, after enough reaction time, a complete shell structure is formed outside, and then the complete shell structure permeates into particles of the butadiene rubber and the nitrile rubber for reaction, in addition, biomass raw materials are added into the mixed rubber of the butadiene rubber and the nitrile rubber, lignin is added into the butadiene rubber and the nitrile rubber by a coprecipitation method after being purified, a rigid network is generated in the rubber by utilizing the lignin, and the defects in the mechanical property of the rubber shock pad are solved, the plastic deformation capability of the stretching section is poor, and the cross-linking degree of the rubber base material is low in the preparation process of the rubber shock pad.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a rubber shock pad for automobile shock absorption specifically comprises the following raw materials in parts by weight: 68-80 parts of natural rubber, 15-20 parts of auxiliary rubber, 30-40 parts of filler, 4-6 parts of additive, 1-2 parts of stearic acid, 1-2 parts of anti-aging agent, 1-2 parts of accelerator and 3-5 parts of coupling agent;

the rubber shock pad for automobile shock absorption is prepared by the following method:

firstly, cleaning the surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

putting the rubber base material into pretreatment equipment, putting the rubber base material into a feeding hopper, respectively feeding the rubber base material into five material conveying glass tubes through a feeding pipe, starting a UV light source and an annular electric heating tube, irradiating the five material conveying glass tubes with ultraviolet rays generated by the UV light source, simultaneously heating the rubber base material in the material conveying glass tubes by the annular electric heating tube, setting the conveying time of the rubber base material in the material conveying glass tubes to be 35s, and finally extracting the rubber base material through a discharging pipe to obtain the pretreatment base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, placing the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure at 20-30Mpa and the vulcanization temperature at 110-125 ℃, vulcanizing for 20-30min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

Preferably, the filler is formed by mixing carbon black N550 and white carbon black according to a mass ratio of 1:0.6, the additive is formed by mixing zinc oxide and magnesium oxide according to a mass ratio of 1:1.2, the anti-aging agent is one of an anti-aging agent RD, an anti-aging agent D and an anti-aging agent MB, the accelerator is one of an accelerator D, an accelerator M and an accelerator PZ, and the coupling agent is KH-590.

Preferably, in the first step, the natural rubber is crushed to 60 meshes, an open mill is used for plasticating the natural rubber machine for 8 times, in the second step, the internal mixing initial temperature of the internal mixer is set to be 80 ℃, the rotating speed is 80rpm, the filling coefficient is 0.75, the rubber discharge temperature is 160 ℃, and the open mill is used for sheet discharging, the open mill conditions are set to be that the roll temperature is 40 ℃, the roll distance is 1mm, the roll distance in thin passing is 0.2mm, and the roll distance in sheet discharging is 2 mm.

Preferably, the auxiliary rubber is prepared by the following method:

step A1, weighing styrene serving as a raw material, introducing the styrene into a four-neck flask, adding sodium dodecyl sulfate into the four-neck flask, then adding distilled water, introducing nitrogen into the four-neck flask, stirring the mixed solution by using a mechanical stirring device, carrying out stirring reaction for 1 hour, then adding potassium persulfate, continuing stirring reaction for 3 hours, and finally carrying out drying treatment by using a vacuum drying device to obtain precursor powder a;

a2, weighing alkali lignin, introducing the alkali lignin into a beaker, adding distilled water into the beaker, uniformly stirring, adding a 1mol/L sodium hydroxide aqueous solution into the beaker until the pH value of the solution in the beaker is 12-13, centrifuging the solution in the beaker to remove precipitated impurities, taking the solution, stirring the solution with a 1mol/L dilute acid solution until the pH value is 2-3, heating in a water bath for 2 hours, carrying out suction filtration, finally washing with distilled water, and carrying out vacuum drying on a filter cake to obtain precursor powder b;

and A3, cleaning the surfaces of the butadiene rubber and the nitrile rubber, putting the butadiene rubber and the nitrile rubber into a grinder for grinding, putting the ground mixed rubber particles into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, adding the precursor powder a and the precursor powder b into the mixed rubber particles, banburying for 5min by an internal mixer, putting the mixture into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain the auxiliary rubber.

Preferably, in the step A1, the mass ratio of styrene to sodium dodecyl sulfate is 1:0.7, in the step A2, the centrifugal treatment condition is 5000r/min, the centrifugal treatment condition is 30min, and in the step A3, the mixing mass ratio of butadiene rubber and nitrile rubber is 1.2: 1.

Preferably, the pretreatment device comprises a fixed seat and a feed cylinder, the fixed seat is provided with two fixed seats, the interiors of the two fixed seats are respectively fixedly connected with two sides of the surface of the feed cylinder, the left end of the feed cylinder is communicated with a feed pipe, the right end of the feed cylinder is communicated with a discharge pipe, and the left end of the feed pipe is communicated with a feed hopper.

Preferably, the inside of feed cylinder is provided with UV light source and defeated material glass pipe respectively, and defeated material glass pipe is located UV light source be provided with five all around, five defeated material glass pipe's left end all communicates with the right-hand member of inlet pipe, and five defeated material glass pipe's right-hand member all communicates with the left end of discharging pipe, the inner wall fixedly connected with annular electrothermal tube of feed cylinder.

A preparation process of a rubber shock pad for automobile shock absorption specifically comprises the following steps:

firstly, cleaning the specific surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 2-3h, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

putting the rubber base material into pretreatment equipment, putting the rubber base material into a feeding hopper, respectively feeding the rubber base material into five material conveying glass tubes through a feeding pipe, starting a UV light source and an annular electric heating tube, irradiating the five material conveying glass tubes with ultraviolet rays generated by the UV light source, simultaneously heating the rubber base material in the material conveying glass tubes by the annular electric heating tube, setting the conveying time of the rubber base material in the material conveying glass tubes to be 35s, and finally extracting the rubber base material through a discharging pipe to obtain the pretreatment base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60-75 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, placing the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure at 20-30Mpa and the vulcanization temperature at 110-125 ℃, vulcanizing for 20-30min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

(III) advantageous effects

The invention provides a rubber shock pad for automobile shock absorption and a preparation process thereof. Compared with the prior art, the method has the following beneficial effects:

according to the rubber shock pad for automobile shock absorption, the auxiliary rubber is added into the raw material of the rubber shock pad, wherein the auxiliary rubber is subjected to grafting reaction between styrene and butadiene rubber and nitrile rubber, the styrene-grafted butadiene rubber and nitrile rubber are subjected to reaction from the edge to the inside, and after sufficient reaction time, a complete shell structure is formed outside, and then the styrene-grafted butadiene rubber and nitrile rubber are infiltrated into particles of butadiene rubber and nitrile rubber for reaction, so that the mechanical property of the rubber shock pad is effectively improved;

in addition, biomass raw materials are added into the mixed rubber of the butadiene rubber and the nitrile rubber, lignin is added into the butadiene rubber and the nitrile rubber by a coprecipitation method after being purified, and the lignin is utilized to generate a rigid network in the rubber, so that the plastic deformation of a stretching section is improved, the heat dissipation in the stretching process can be faster and more effective, and the mechanical property of the rubber shock pad is greatly improved;

through and the in-process of carrying out rubber shock pad preparation, adopt pretreatment equipment to carry out the preliminary treatment to rubber base material in advance, utilize UV light to carry out the light vulcanization to rubber base material and handle, increase the cross-linking degree of rubber base material, and then the effectual mechanical properties that improves rubber shock pad.

Drawings

FIG. 1 is a schematic view of the structure of a pretreatment apparatus of the present invention;

FIG. 2 is a side view of the wicking glass tube and UV light source configuration of the present invention.

In the figure, 1, a fixed seat; 2. a charging barrel; 3. a feed pipe; 4. a discharge pipe; 5. a feeding hopper; 6. a UV light source; 7. conveying a glass tube; 8. an annular electric heating tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-2, a rubber shock pad for damping vibration of an automobile specifically comprises the following raw materials in parts by weight: 68 parts of natural rubber, 15 parts of auxiliary rubber, 30 parts of filler, 4 parts of additive, 1 part of stearic acid, 1 part of anti-aging agent, 1 part of accelerator and 3 parts of coupling agent;

the rubber shock pad for automobile shock absorption is prepared by the following method:

firstly, cleaning the surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 2 hours, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

step four, putting the rubber base material into a pretreatment device, putting the rubber base material into a feeding hopper 5, respectively feeding the rubber base material into five material conveying glass tubes 7 through a feeding pipe 3, starting a UV light source 6 and an annular electric heating tube 8, irradiating the five material conveying glass tubes 7 by using ultraviolet rays generated by the UV light source 6, simultaneously heating the rubber base material in the material conveying glass tubes 7 by the annular electric heating tube 8, setting the conveying time of the rubber base material in the material conveying glass tubes 7 to be 35s, and finally extracting the rubber base material through a discharging pipe 4 to obtain the pretreated base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, putting the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure to be 20Mpa and the vulcanization temperature to be 110 ℃, vulcanizing for 20min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

The filler is formed by mixing carbon black N550 and white carbon black according to a mass ratio of 1:0.6, the additive is formed by mixing zinc oxide and magnesium oxide according to a mass ratio of 1:1.2, the anti-aging agent is one of an anti-aging agent RD, an anti-aging agent D and an anti-aging agent MB, the accelerator is one of an accelerator D, an accelerator M and an accelerator PZ, and the coupling agent is KH-590.

In the first step, the natural rubber is crushed to 60 meshes, an open mill is used for plasticating the natural rubber machine for 8 times, in the second step, the initial banburying temperature of the internal mixer is set to be 80 ℃, the rotating speed is 80rpm, the filling coefficient is 0.75, the rubber discharge temperature is 160 ℃, and the open mill is used for sheet discharging, the open mill conditions are set to be that the roll temperature is 40 ℃, the roll distance is 1mm, the roll distance in thin passing is 0.2mm, and the roll distance in sheet discharging is 2 mm.

The auxiliary rubber is prepared by the following method:

step A1, weighing styrene serving as a raw material, introducing the styrene into a four-neck flask, adding sodium dodecyl sulfate into the four-neck flask, then adding distilled water, introducing nitrogen into the four-neck flask, stirring the mixed solution by using a mechanical stirring device, carrying out stirring reaction for 1 hour, then adding potassium persulfate, continuing stirring reaction for 3 hours, and finally carrying out drying treatment by using a vacuum drying device to obtain precursor powder a;

a2, weighing alkali lignin, introducing the alkali lignin into a beaker, adding distilled water into the beaker, uniformly stirring, adding a 1mol/L sodium hydroxide aqueous solution into the beaker until the pH value of the solution in the beaker is 12, centrifuging the solution in the beaker to remove precipitated impurities, taking the solution, stirring the solution with a 1mol/L dilute acid solution until the pH value is 2, heating the solution in a water bath for 2 hours, carrying out suction filtration, washing the solution with distilled water, and carrying out vacuum drying on a filter cake to obtain precursor powder b;

and A3, cleaning the surfaces of the butadiene rubber and the nitrile rubber, putting the butadiene rubber and the nitrile rubber into a grinder for grinding, putting the ground mixed rubber particles into an oven, setting the temperature of the oven to be 60 ℃, baking for 2 hours, adding the precursor powder a and the precursor powder b into the mixed rubber particles, carrying out banburying treatment for 5 minutes by using a banbury mixer, putting the mixed material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 60 ℃ to obtain the auxiliary rubber.

In the step A1, the using mass ratio of the styrene to the sodium dodecyl sulfate is 1:0.7, in the step A2, the centrifugal treatment condition is 5000r/min, the centrifugation is 30min, and in the step A3, the mixing mass ratio of the butadiene rubber and the nitrile rubber is 1.2: 1.

Example 2

Referring to fig. 1-2, a rubber shock pad for damping vibration of an automobile specifically comprises the following raw materials in parts by weight: 80 parts of natural rubber, 20 parts of auxiliary rubber, 40 parts of filler, 6 parts of additive, 2 parts of stearic acid, 2 parts of anti-aging agent, 2 parts of accelerator and 5 parts of coupling agent;

the rubber shock pad for automobile shock absorption is prepared by the following method:

firstly, cleaning the surface of natural rubber, then putting the natural rubber into a grinder for grinding, then putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 3 hours, and then plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

step four, putting the rubber base material into a pretreatment device, putting the rubber base material into a feeding hopper 5, respectively feeding the rubber base material into five material conveying glass tubes 7 through a feeding pipe 3, starting a UV light source 6 and an annular electric heating tube 8, irradiating the five material conveying glass tubes 7 by using ultraviolet rays generated by the UV light source 6, simultaneously heating the rubber base material in the material conveying glass tubes 7 by the annular electric heating tube 8, setting the conveying time of the rubber base material in the material conveying glass tubes 7 to be 35s, and finally extracting the rubber base material through a discharging pipe 4 to obtain the pretreated base material;

putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 75 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, putting the semi-finished product into a vulcanizing machine for vulcanization treatment after mold filling, setting the vulcanization pressure at 30Mpa and the vulcanization temperature at 125 ℃, vulcanizing for 30min, and deburring and trimming after mold opening to obtain the rubber shock pad for automobile shock absorption.

The filler is formed by mixing carbon black N550 and white carbon black according to a mass ratio of 1:0.6, the additive is formed by mixing zinc oxide and magnesium oxide according to a mass ratio of 1:1.2, the anti-aging agent is one of an anti-aging agent RD, an anti-aging agent D and an anti-aging agent MB, the accelerator is one of an accelerator D, an accelerator M and an accelerator PZ, and the coupling agent is KH-590.

In the first step, the natural rubber is crushed to 60 meshes, an open mill is used for plasticating the natural rubber machine for 8 times, in the second step, the initial banburying temperature of the internal mixer is set to be 80 ℃, the rotating speed is 80rpm, the filling coefficient is 0.75, the rubber discharge temperature is 160 ℃, and the open mill is used for sheet discharging, the open mill conditions are set to be that the roll temperature is 40 ℃, the roll distance is 1mm, the roll distance in thin passing is 0.2mm, and the roll distance in sheet discharging is 2 mm.

The auxiliary rubber is prepared by the following method:

step A1, weighing styrene serving as a raw material, introducing the styrene into a four-neck flask, adding sodium dodecyl sulfate into the four-neck flask, then adding distilled water, introducing nitrogen into the four-neck flask, stirring the mixed solution by using a mechanical stirring device, carrying out stirring reaction for 1 hour, then adding potassium persulfate, continuing stirring reaction for 3 hours, and finally carrying out drying treatment by using a vacuum drying device to obtain precursor powder a;

step A2, weighing alkali lignin, introducing the alkali lignin into a beaker, adding distilled water into the beaker, uniformly stirring, adding a 1mol/L sodium hydroxide aqueous solution into the beaker until the pH value of the solution in the beaker is 13, centrifuging the solution in the beaker to remove precipitated impurities, taking the solution, stirring the solution with a 1mol/L dilute acid solution until the pH value is 3, heating the solution in a water bath for 2 hours, carrying out suction filtration, washing the solution with distilled water, and carrying out vacuum drying on a filter cake to obtain precursor powder b;

and A3, cleaning the surfaces of the butadiene rubber and the nitrile rubber, putting the butadiene rubber and the nitrile rubber into a grinder for grinding, putting the ground mixed rubber particles into an oven, setting the temperature of the oven to be 60 ℃, baking for 3 hours, adding the precursor powder a and the precursor powder b into the mixed rubber particles, carrying out banburying treatment for 5 minutes by using a banbury mixer, putting the mixed material into an extruder for extrusion, and setting the extrusion temperature of the extruder to be 75 ℃ to obtain the auxiliary rubber.

In the step A1, the using mass ratio of the styrene to the sodium dodecyl sulfate is 1:0.7, in the step A2, the centrifugal treatment condition is 5000r/min, the centrifugation is 30min, and in the step A3, the mixing mass ratio of the butadiene rubber and the nitrile rubber is 1.2: 1.

Example 3

Pretreatment equipment includes fixing base 1 and feed cylinder 2, fixing base 1 is provided with two, and the inside of two fixing bases 1 respectively with the both sides fixed connection on 2 surfaces of feed cylinder, the left end intercommunication of feed cylinder 2 has inlet pipe 3, and the right-hand member intercommunication of feed cylinder 2 has discharging pipe 4, the left end intercommunication of inlet pipe 3 has hopper 5, the inside of feed cylinder 2 is provided with UV light source 6 and defeated material glass pipe 7 respectively, and defeated material glass pipe 7 is located UV light source 6 be provided with five, five all around defeated material glass pipe 7's left end all with the right-hand member intercommunication of inlet pipe 3, and five defeated material glass pipe 7's right-hand member all with the left end intercommunication of discharging pipe 4, the inner wall fixedly connected with annular electrothermal tube 8 of feed cylinder 2.

Example 4

A preparation process of a rubber shock pad for automobile shock absorption specifically comprises the following steps:

cleaning the specific surface of natural rubber, putting the natural rubber into a grinder for grinding, putting the ground natural rubber into an oven, setting the temperature of the oven to be 60 ℃, baking for 3 hours, and plasticating the natural rubber by using an open mill for later use;

step two, putting the natural rubber and the auxiliary rubber which are plasticated in the step one into an internal mixer, carrying out internal mixing treatment on the mixed rubber material for 1min, then putting the additive, the fatty acid, the anti-aging agent and the accelerator into the internal mixer, and continuously carrying out internal mixing treatment for 3min through the internal mixer to obtain an intermediate;

adding half of the filler and half of the coupling agent into the intermediate, carrying out banburying treatment for 5min by using an internal mixer, then putting the rest filler and the coupling agent into the internal mixer, and carrying out banburying treatment for 5min continuously to obtain a rubber base material;

step four, putting the rubber base material into a pretreatment device, putting the rubber base material into a feeding hopper 5, respectively feeding the rubber base material into five material conveying glass tubes 7 through a feeding pipe 3, starting a UV light source 6 and an annular electric heating tube 8, irradiating the five material conveying glass tubes 7 by using ultraviolet rays generated by the UV light source 6, simultaneously heating the rubber base material in the material conveying glass tubes 7 by the annular electric heating tube 8, setting the conveying time of the rubber base material in the material conveying glass tubes 7 to be 35s, and finally extracting the rubber base material through a discharging pipe 4 to obtain the pretreated base material;

step five, putting the pretreated base material into an extruder for extrusion, and setting the extrusion temperature of the extruder to 65 ℃ to obtain an extruded material;

step six, putting the extruded materials into a die cavity, setting the pressure of a die casting machine to be 60MPa, setting the temperature of an upper die and a lower die to be 95 ℃, and performing pressure maintaining treatment for 1min to obtain a semi-finished product;

and seventhly, putting the semi-finished product into a vulcanizing machine for vulcanization treatment after die filling, setting the vulcanization pressure at 20Mpa and the vulcanization temperature at 120 ℃, vulcanizing for 30min, and deburring and trimming after die opening to obtain the rubber shock pad for automobile shock absorption.

And those not described in detail in this specification are well within the skill of those in the art.

The working principle of the pretreatment equipment is that when the pretreatment equipment is used, a rubber base material is put into the pretreatment equipment, the rubber base material is put into a feeding hopper 5, the rubber base material is respectively fed into five material conveying glass tubes 7 through a feeding tube 3, a UV light source 6 and an annular electric heating tube 8 are started, ultraviolet rays generated by the UV light source 6 are irradiated on the five material conveying glass tubes 7, meanwhile, the annular electric heating tube 8 heats the rubber base material in the material conveying glass tubes 7, the conveying time of the rubber base material in the material conveying glass tubes 7 is set to be 35s, and finally, the rubber base material is extracted through a discharging tube 4 to obtain the pretreatment base material.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.