阅读说明：本技术 一种隔垫、混炼胶及其制备方法 (Shock insulator, rubber compound and preparation method thereof ) 是由 赵斌 陈垒荣 于 2021-06-25 设计创作，主要内容包括：本发明公开一种隔垫、混炼胶及其制备方法,属于金属加工配件技术领域。混炼胶的制备方法,包括以下步骤：S1、在密炼机中加入硅橡胶生胶、白炭黑、羟基硅油和乙烯基三甲氧基硅烷混炼得到混合物；其中,按照重量份数计算,包括所述硅橡胶生胶900-1000份；白炭黑400-500份；羟基硅油40-60份；乙烯基三甲氧基硅烷1-5份；S2、将混合物升温至100-110℃并转移至捏合机中,通氮气并在170℃-190℃下混炼得到混炼胶。本发明还提出一种隔垫,包括支撑架和包裹层,所述包裹层由上述混炼胶挤压成型制得,所述包裹层包裹于所述支撑架的外表面上。该隔垫不容易发现形变和不易破损,也不会磨损被堆叠物的表面。(The invention discloses a spacer, a rubber compound and a preparation method thereof, and belongs to the technical field of metal processing accessories. The preparation method of the rubber compound comprises the following steps: s1, adding raw silicone rubber, white carbon black, hydroxyl silicone oil and vinyl trimethoxy silane into an internal mixer, and mixing to obtain a mixture; wherein, the weight portion of the silicone rubber raw rubber comprises 900 portions and 1000 portions; 400 portions of white carbon black and 500 portions of organic silica; 40-60 parts of hydroxyl silicone oil; 1-5 parts of vinyl trimethoxy silane; s2, heating the mixture to 100-110 ℃, transferring the mixture into a kneader, introducing nitrogen and mixing at 170-190 ℃ to obtain the rubber compound. The invention also provides the spacer which comprises a support frame and a wrapping layer, wherein the wrapping layer is formed by extrusion molding of the rubber compound, and the wrapping layer wraps the outer surface of the support frame. The spacer is not easily deformed and damaged, and does not wear the surface of the stacked object.)

1. The preparation method of the rubber compound is characterized by comprising the following steps of:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, a vulcanizing agent, asbestos threads, an anti-aging agent and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, the weight portion of the silicone rubber raw rubber comprises 900 portions and 1000 portions; 400 portions of white carbon black and 500 portions of white carbon black; 40-60 parts of hydroxyl silicone oil; 1-5 parts of vinyl trimethoxy silane; 1-3 parts of a vulcanizing agent; 2-4 parts of asbestos threads; 2-4 parts of an anti-aging agent; 0.5-1 part of pigment;

s2, heating the mixture to the temperature of 100-110 ℃, transferring the mixture into a kneader, introducing nitrogen and mixing at the temperature of 170-190 ℃ to obtain the rubber compound.

2. The method for preparing a composite material according to claim 1, further comprising, after step S2, the steps of:

s3, microwave curing the mixed rubber obtained in the step S2.

3. The method for preparing a composite material according to claim 2, further comprising, after step S3, the steps of:

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the cylinder temperature is 150-165 ℃, the head temperature is 170-190 ℃, and the die head temperature is 190-200 ℃.

4. The method according to claim 2, wherein in step S3, the vulcanization time is 1 to 3 min.

5. The method of claim 1, wherein in step S2, the mixing is performed at 170 ℃ to 190 ℃ for 1 to 2 hours.

6. The method according to claim 1, wherein in step S1, the raw silicone rubber is one or more of vinyl silicone rubber, fluorosilicone rubber, and phenyl silicone rubber.

7. A rubber composition prepared by the method according to any one of claims 1 to 6.

8. A spacer characterized by comprising a support frame and a coating layer, wherein the coating layer is formed by extrusion molding of the rubber compound of claim 7, and the coating layer is coated on the outer surface of the support frame.

9. The spacer of claim 8 wherein the support frame is made of stainless steel or aluminum alloy.

10. The spacer of claim 8 wherein said support frame includes a top layer, a bottom layer and support posts, said top layer and said bottom layer being connected by said support posts.

Technical Field

The invention relates to the technical field of metal processing accessories, and particularly relates to a spacer, a rubber compound and a preparation method thereof.

Background

Most of sectional materials, building materials, stones, plates and the like are often required to be stacked in the production processing process or the storage process or the transportation process, but the stacking of the materials is required to be up and down corresponding, the interval is proper, the number is proper, excessive stacking cannot be realized,

to ensure the surface quality of such materials. The conventional parting strips are generally felt parting strips, asbestos fiber cloth parting strips dipped with fluorine rubber latex, wooden parting strips and high-density foam parting strips, but the conventional parting strips are easy to wear and high in replacement frequency, so that the production, storage and transportation costs of materials such as sectional materials, building materials, stones and plates are increased, and the felt parting strips, the asbestos fiber cloth parting strips dipped with fluorine rubber latex, the wooden parting strips and the high-density foam parting strips are relatively soft and have poor support property, stacked materials are easy to incline, the surfaces of the materials are easy to damage and can not meet the requirements of the parting strips, and a large number of waste felt parting strips, the asbestos fiber cloth parting strips dipped with fluorine rubber latex, the wooden parting strips and the high-density foam parting strips can pollute the environment and cause resource waste.

Therefore, a need exists for a parting strip which has good support and is wear-resistant and will not damage the surface of the materials such as profiles, building materials, stone materials, plates, etc.

Disclosure of Invention

The invention aims to overcome the technical defects, provides a spacer, a rubber compound and a preparation method thereof, and solves the technical problems that the spacer is easy to deform and damage and abrades the surface of a stacked object in the prior art.

The invention provides a preparation method of a rubber compound, which comprises the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, a vulcanizing agent, asbestos threads, an anti-aging agent and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, the weight portion of the silicone rubber raw rubber comprises 900 portions and 1000 portions; 400 portions of white carbon black and 500 portions of white carbon black; 40-60 parts of hydroxyl silicone oil; 1-5 parts of vinyl trimethoxy silane; 1-3 parts of a vulcanizing agent; 2-4 parts of asbestos threads; 2-4 parts of an anti-aging agent; 0.5-1 part of pigment;

s2, heating the mixture to the temperature of 100-110 ℃, transferring the mixture into a kneader, introducing nitrogen and mixing at the temperature of 170-190 ℃ to obtain the rubber compound.

Further, after step S2, the method further includes the steps of:

s3, microwave curing the mixed rubber obtained in the step S2.

Further, after step S3, the method further includes the steps of:

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the cylinder temperature is 150-165 ℃, the head temperature is 170-190 ℃, and the die head temperature is 190-200 ℃.

Further, in step S3, the time for vulcanization is 1-3 min.

Further, in step S2, the mixing time at 170-190 ℃ is 1-2 h.

Further, in step S1, the raw silicone rubber is one or more of vinyl silicone rubber, fluorosilicone rubber and phenyl silicone rubber.

The invention also provides the rubber compound prepared by the preparation method.

The invention also provides the spacer which comprises a support frame and a wrapping layer, wherein the wrapping layer is formed by extrusion molding of the rubber compound, and the wrapping layer wraps the outer surface of the support frame.

Furthermore, the material of the support frame is stainless steel or aluminum alloy.

Furthermore, the support frame includes top layer, bottom and bracing piece, the top layer with pass through between the bottom the bracing piece is connected.

Compared with the prior art, the invention has the beneficial effects that: after the rubber compound prepared by the method is used as a wrapping layer of the shock insulator, the shock insulator has better wear resistance and deformation prevention performance by combining with the supporting frame of the shock insulator, the surface of a stacked object cannot be abraded, and the breakage rate is as low as 1.2 percent after a heavy object is stacked for one month.

Drawings

Fig. 1 is a left side view of the spacer according to the present invention.

Fig. 2 is a left side view of the support stand in embodiment 5 of the present invention.

Description of reference numerals: 1. a support frame; 11. a top layer; 12. a bottom layer; 13. a support bar; 14. an arc-shaped plate; 2. and (7) a wrapping layer.

Detailed Description

The specific embodiment provides a preparation method of a rubber compound, which comprises the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, a vulcanizing agent, asbestos threads, an anti-aging agent and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, the weight portion of the silicone rubber raw rubber comprises 900 portions and 1000 portions; 400 portions of white carbon black and 500 portions of white carbon black; 40-60 parts of hydroxyl silicone oil; 1-5 parts of vinyl trimethoxy silane; 1-3 parts of a vulcanizing agent; 2-4 parts of asbestos threads; 2-4 parts of an anti-aging agent; 0.5-1 part of pigment; the raw silicone rubber is one or more of vinyl silicone rubber, fluorosilicone rubber and phenyl silicone rubber; the vulcanizing agent is sulfur; the anti-aging agent is N-cyclohexyl-N' -phenyl p-phenylenediamine;

s2, heating the mixture to 110 ℃ and transferring the mixture to a kneader, introducing nitrogen and mixing for 1-2h at 170-190 ℃ to obtain rubber compound;

s3, carrying out microwave vulcanization on the mixed rubber obtained in the step S2 for 1-3 min; the microwave wavelength is less than lm, and the frequency is U.3-3 UD MHO; the microwave heating does not have the temperature difference between the inside and the outside of the partition bar wrapping layer caused by uneven heat conduction in the common heating vulcanization, is beneficial to improving the vulcanization quality of the wrapping layer, and can greatly shorten the vulcanization time;

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the cylinder temperature is 150-165 ℃, the head temperature is 170-190 ℃, and the die head temperature is 190-200 ℃.

The rubber compound obtained through mixing plays a decisive role in the subsequent processing of rubber materials and the quality of the spacer, and can ensure that vulcanized rubber has good physical and mechanical properties and the rubber compound has good process processability; thereby solving the problems of uneven dispersion of compounding agents, overhigh or overlow plasticity, scorching, frosting and the like of the sizing material, ensuring the normal operation of subsequent processing and processing the high-quality shock insulator.

In the specific embodiment, the wrapping layer is made of vinyl silicone rubber, and the temperature of the environment for using the spacer can reach about 150 ℃; the wrapping layer is made of fluorosilicone rubber, and the use environment temperature of the parting strips can reach about 200 ℃; the wrapping layer is made of phenyl silicone rubber, and the service environment temperature of the parting strips can reach 250-300 ℃.

The specific embodiment also comprises the mixed rubber prepared by the preparation method.

With reference to fig. 1-2, the present embodiment further includes a spacer, which includes a supporting frame 1 and a wrapping layer 2, wherein the wrapping layer 2 is formed by extrusion molding of the rubber compound, and the wrapping layer 2 wraps the outer surface of the supporting frame 1; the support frame 1 is made of stainless steel or aluminum alloy; the support frame 1 comprises a top layer 11, a bottom layer 12 and a support rod 13, wherein the top layer 11 and the bottom layer 12 are connected through the support rod 13. Further, the sides of the top layer 11 and the bottom layer 12 are connected by curved plates 14 or curved connecting bars.

When the support frame is wrapped by the wrapping layer, the rubber compound is extruded through the T-shaped extrusion die under the action of the screw rod, so that the surface of the support frame is uniformly covered by the rubber compound, the temperature of each part of the extruder is reasonably controlled, the extrusion process of the rubber compound can be guaranteed to be smoothly carried out, and the output of extrusion and the quality of the formed wrapping layer are improved. Before extrusion, the used rubber compound is preheated in advance to soften the rubber compound and be easy to extrude, so that a partition strip with a smooth wrapping layer and accurate size is formed; before extrusion, the supporting frame is cut according to the required size

The spacer provided by the invention adopts a stainless steel and aluminum alloy section bar support frame and a hollow structure, the structural strength and the weight of the spacer are considered, the support frame 1 is ensured to be stable, meanwhile, the weight is not too heavy, and the wrapping layer 2 is arranged outside the support frame, so that the wrapping layer 2 can support materials such as section bars, building materials, stones, plates and the like and can elastically contact with the materials, and the surfaces of the materials cannot be damaged; the spacer manufactured by the manufacturing process is suitable for the production process, storage and transportation of materials such as profiles, building materials, stones, plates and the like, is wear-resistant, has good elasticity and excellent support property, and the thermoplastic vulcanized rubber prepared by the wrapping layer 2 by the method provided by the invention has the characteristics of excellent high tension, high tensile force, toughness and aging resistance and is more environment-friendly.

The top layer 11 and the bottom layer 12 of the support frame 1 of the spacer provided by the invention are provided with two long flat side surfaces (arc plates), so that the stability of the spacer support is ensured, the hollow structure of the support frame 1 provides higher support strength and bearing force for the spacer, and the wrapping layer 2 ensures that the spacer has the advantages of higher wear resistance and durability, so that materials such as profiles, building materials, stones, plates and the like which are stacked higher in bearing can not be inclined, and the surface of the materials can not be damaged.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

This example proposes a rubber compound prepared by the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, sulfur, asbestos wire, an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, calculated according to the weight portion, the rubber comprises 900 portions of the vinyl silicone rubber; 450 parts of white carbon black; 40 parts of hydroxyl silicone oil; 1 part of vinyl trimethoxy silane; 2 parts of sulfur; 2 parts of asbestos threads; 3 parts of an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine; 0.5 part of pigment;

s2, heating the mixture to 100 ℃, transferring the mixture into a kneader, introducing nitrogen, and mixing at 170 ℃ for 1.5h to obtain a rubber compound;

s3, carrying out microwave vulcanization on the mixed rubber obtained in the step S2 for 1 min;

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the barrel temperature was 150 ℃, the head temperature 180 ℃ and the die temperature 190 ℃.

Example 2

This example proposes a rubber compound prepared by the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, sulfur, asbestos wire, an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, calculated according to the weight portion, the rubber comprises 900 portions of the vinyl silicone rubber; 450 parts of white carbon black; 40 parts of hydroxyl silicone oil; 1 part of vinyl trimethoxy silane; 1 part of sulfur; 3 parts of asbestos threads; 4 parts of an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine; 1 part of pigment;

s2, heating the mixture to 110 ℃, transferring the mixture into a kneader, introducing nitrogen, and mixing for 2h at 180 ℃ to obtain a rubber compound;

s3, carrying out microwave vulcanization on the mixed rubber obtained in the step S2 for 2 min;

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the barrel temperature was 160 ℃, the head temperature was 170 ℃ and the die temperature was 200 ℃.

Example 3

This example proposes a rubber compound prepared by the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, sulfur, asbestos wire, an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, calculated according to the weight portion, the rubber comprises 900 portions of the vinyl silicone rubber; 450 parts of white carbon black; 40 parts of hydroxyl silicone oil; 1 part of vinyl trimethoxy silane; 3 parts of sulfur; 2 parts of asbestos threads; 2 parts of an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine; 0.5 part of pigment;

s2, heating the mixture to 105 ℃, transferring the mixture into a kneader, introducing nitrogen, and mixing for 1h at 190 ℃ to obtain a rubber compound;

s3, carrying out microwave vulcanization on the mixed rubber obtained in the step S2 for 3 min;

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the barrel temperature was 165 deg.C, the head temperature was 190 deg.C, and the die temperature was 195 deg.C.

Example 4

This example proposes a rubber compound prepared by the following steps:

s1, adding raw silicon rubber, white carbon black, hydroxyl silicone oil, vinyl trimethoxy silane, sulfur, asbestos wire, an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine and a pigment into an internal mixer, and mixing to obtain a mixture; wherein, calculated according to the weight portion, the rubber comprises 900 portions of the vinyl silicone rubber; 450 parts of white carbon black; 40 parts of hydroxyl silicone oil; 1 part of vinyl trimethoxy silane; 3 parts of sulfur; 2 parts of asbestos threads; 4 parts of an anti-aging agent N-cyclohexyl-N' -phenyl p-phenylenediamine; 0.5 part of pigment;

s2, heating the mixture to 110 ℃, transferring the mixture into a kneader, introducing nitrogen, and mixing for 1.5h at 185 ℃ to obtain a rubber compound;

s3, carrying out microwave vulcanization on the mixed rubber obtained in the step S2 for 2 min;

s4, placing the rubber compound subjected to microwave vulcanization into a hopper of an extruder for extrusion molding, wherein the temperature of the extruder is set as follows: the barrel temperature was 155 deg.C, the die head temperature was 185 deg.C, and the die head temperature was 190 deg.C.

Example 5

With reference to fig. 1-2, the present embodiment provides a spacer, which includes a supporting frame 1 and a wrapping layer 2, wherein the wrapping layer 2 is formed by extrusion molding of the rubber compound of the above embodiment 1, and the wrapping layer 2 wraps the outer surface of the supporting frame 1; the support frame 1 is made of stainless steel or aluminum alloy; the support frame 1 comprises a top layer 11, a bottom layer 12 and a support rod 13, wherein the top layer 11 and the bottom layer 12 are connected through the support rod 13. The sides of the top layer 11 and the bottom layer 12 are connected by an arcuate plate 14. The support frame 1 is made of stainless steel, and the thickness of the wrapping layer 2 is 0.5 cm.

Example 6

The embodiment provides a spacer, which comprises a support frame 1 and a wrapping layer 2, wherein the wrapping layer 2 is prepared by extrusion molding of the rubber compound of the embodiment 1, and the wrapping layer 2 wraps the outer surface of the support frame 1; the support frame 1 is made of stainless steel or aluminum alloy; the support frame 1 comprises a top layer 11, a bottom layer 12 and a support rod 13, wherein the top layer 11 and the bottom layer 12 are connected through the support rod 13. The sides of the top layer 11 and the bottom layer 12 are connected by curved connecting bars. The support frame 1 is made of stainless steel, and the thickness of the wrapping layer 2 is 1 cm.

Example 7

This example differs from example 5 in that the covering 2 is obtained by extrusion molding of the rubber composition obtained in example 2. The support frame 1 is made of aluminum alloy, and the thickness of the wrapping layer 2 is 0.5 cm.

Example 8

This example differs from example 5 in that the coating 2 is obtained by extrusion molding of the rubber composition obtained in example 3. The support frame 1 is made of aluminum alloy, and the thickness of the wrapping layer 2 is 1.5 m.

Example 9

This example differs from example 5 in that the coating 2 is obtained by extrusion molding of the rubber composition obtained in example 4. The thickness of the wrapping layer 2 is 1 cm.

Comparative example 1

The spacers in this comparative example were obtained by extrusion molding using only the rubber composition of example 1, and had a thickness of 1.5 cm.

Comparative example 2

The spacer in this comparative example was used only with the holder 1 of example 9.

Performance testing

In order to detect the wear resistance and the bearing capacity of the shock insulator, the shock insulator is used for stacking granite stones, each shock insulator is provided with a granite stone with the surface area basically the same as that of the shock insulator, the granite stones are stacked for one month, the stacked granite stones are replaced for one time in the middle of the month because the stacked granite stones need to be removed in the month, the state of the shock insulator is checked after one month, the checked items comprise whether the shock insulator is obviously deformed or not, whether the shock insulator is not deformed, slightly deformed and seriously deformed or not according to the degree of deformation, whether the surface is damaged or not, the damage rate is calculated according to the damage degree of the surface, and whether the damage rate is abraded on the granite slab or not according to the damage area ratio to the whole surface area, and the results are shown in table 1.

TABLE 1 test results of examples 1 to 5 and comparative examples 1 to 2

As can be seen from Table 1, the spacers prepared in examples 5 to 9 have no deformation, while the spacer of comparative example 1 has no support frame 1 and has severe deformation, mainly because the spacer itself has no rigidity and no support function of the support frame, and is easy to deform under the extrusion of a heavy object, the spacer of comparative example 2 also has slight deformation, and no coating layer 2 is arranged, the support frame 1 is directly contacted with the granite plate, the buffer function of the coating layer 2 is reduced and is easy to crush, in addition, the hardness of the support frame 1 is higher, so that the contact surface of the granite plate is abraded, and other spacers with the coating layer 2 have no abrasion to the granite plate; in addition, the spacers of examples 8 to 9 had a low breakage rate as low as 1.2%.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.