1. A composite rubber mat, comprising: the iron plate is arranged in the rubber base plate body, the upper surface and the lower surface of the rubber base plate body are alternately provided with primary and secondary grooves, and the primary and secondary grooves comprise a contact shallow groove and a contact deep groove.

2. The composite rubber mat as set forth in claim 1, wherein: the cross section of the contact shallow groove is triangular, the cross section of the contact deep groove is trapezoidal, and the middle part of the upper surface of the rubber base plate body is provided with a heat dissipation groove.

3. The composite rubber pad board as claimed in claim 1, wherein the rubber pad board body is composed of the following raw materials in parts by weight:

4. a process for producing a composite rubber pad for use in producing the composite rubber pad according to any one of claims 1 to 3, comprising the steps of:

s10, refining the rubber base plate body: plasticating the natural rubber, standing for 24 hours for later use, then putting the butadiene styrene rubber and the butadiene rubber into the natural rubber after standing for blending and standing for 24 hours, and then putting other auxiliary materials into the blended rubber for blending;

s20, thin passing of the rubber pad body: returning the mixed rubber to the vehicle, thinly passing the rubber twice to a required size, and then standing the rubber for later use;

s30, iron plate pretreatment: desalting an iron plate with a prefabricated size, coating a layer of 205 Kellock adhesive on the iron plate, airing, coating a layer of 220 Kellock adhesive, and airing for later use;

s40, compounding: taking two cut rubber base plate bodies, placing the iron plate after pretreatment between the two rubber base plate bodies and putting the iron plate into a mold for vulcanization treatment, and obtaining the composite rubber base plate after the two rubber base plate bodies are fused into a whole.

5. The process for preparing a composite rubber pad according to claim 4, wherein the process comprises the following steps: in step S40, the process conditions of the vulcanization treatment are 155 degrees celsius, 125 megapascals, and 10min of process time.

Background

With the rapid development of high-speed railways in recent years, from the opening of intercity railways in 2008 to the fact that intercity trains become normalized vehicles nowadays, the high-speed running of the trains puts higher requirements on the vibration reduction performance of the rails. Based on the advantages of good smoothness of the ballastless track, less maintenance in the service life, long service life, permission of speed increase in the future and the like, the ballastless track is adopted by modern high-speed railways. However, the ballastless track also has the defect of high rigidity, so that a train is easy to separate from the track to cause travelling danger, and in order to make up for the defect, an elastic base plate is particularly introduced into the ballastless track.

However, the shock absorption pad plate made of the existing thermoplastic elastomer has good pressure resistance and acid and alkali resistance, but the wear resistance and the mechanical strength performance of the shock absorption pad plate are poor, and the applicability is limited.

Disclosure of Invention

The invention aims to provide a composite rubber base plate and a preparation process thereof, and aims to solve the problems.

In order to achieve the purpose, the invention provides the following technical scheme: a composite rubber caul sheet comprising: the iron plate is arranged in the rubber base plate body, the upper surface and the lower surface of the rubber base plate body are alternately provided with primary and secondary grooves, and the primary and secondary grooves comprise a contact shallow groove and a contact deep groove.

As an improvement of the invention, the cross section of the contact shallow groove is triangular, the cross section of the contact deep groove is trapezoidal, and the middle part of the upper surface of the rubber base plate body is provided with a heat dissipation groove.

As an improvement of the invention, the rubber base plate body is composed of the following raw materials in parts by weight:

a preparation process of a composite rubber base plate comprises the following steps:

s10, refining the rubber base plate body: plasticating the natural rubber, standing for 24 hours for later use, then putting the butadiene styrene rubber and the butadiene rubber into the natural rubber after standing for blending and standing for 24 hours, and then putting other auxiliary materials into the blended rubber for blending;

s20, thin passing of the rubber pad body: returning the mixed rubber to the vehicle, thinly passing the rubber twice to a required size, and then standing the rubber for later use;

s30, iron plate pretreatment: desalting an iron plate with a prefabricated size, coating a layer of 205 Kellock adhesive on the iron plate, airing, coating a layer of 220 Kellock adhesive, and airing for later use;

s40, compounding: taking two cut rubber base plate bodies, placing the iron plate after pretreatment between the two rubber base plate bodies and putting the iron plate into a mold for vulcanization treatment, and obtaining the composite rubber base plate after the two rubber base plate bodies are fused into a whole.

As a modification of the present invention, in step S40, the process conditions of the vulcanization treatment are 155 degrees celsius, 125 mpa and 10 min.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention.

The components in the figure are:

1. the rubber base plate comprises a rubber base plate body, 2, an iron plate, 3, a contact shallow groove, 4, a contact deep groove, 5 and a heat dissipation groove.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Referring to fig. 1, a composite rubber pad includes: the iron plate is arranged in the rubber base plate body, the upper surface and the lower surface of the rubber base plate body are alternately provided with primary and secondary grooves, and the primary and secondary grooves comprise a contact shallow groove and a contact deep groove.

As an embodiment of the present invention, a cross section of the shallow contact groove is triangular, a cross section of the deep contact groove is trapezoidal, and a heat dissipation groove is formed in a middle portion of an upper surface of the rubber pad body.

As an embodiment of the invention, the rubber base plate body is composed of the following raw materials in parts by weight:

a preparation process of a composite rubber base plate comprises the following steps:

s10, refining the rubber base plate body: plasticating the natural rubber, standing for 24 hours for later use, then putting the butadiene styrene rubber and the butadiene rubber into the natural rubber after standing for blending and standing for 24 hours, and then putting other auxiliary materials into the blended rubber for blending;

s20, thin passing of the rubber pad body: returning the mixed rubber to the vehicle, thinly passing the rubber twice to a required size, and then standing the rubber for later use;

s30, iron plate pretreatment: desalting an iron plate with a prefabricated size, coating a layer of 205 Kellock adhesive on the iron plate, airing, coating a layer of 220 Kellock adhesive, and airing for later use;

s40, compounding: taking two cut rubber base plate bodies, placing the iron plate after pretreatment between the two rubber base plate bodies and putting the iron plate into a mold for vulcanization treatment, and obtaining the composite rubber base plate after the two rubber base plate bodies are fused into a whole.

As an embodiment of the present invention, in step S40, the process conditions of the vulcanization treatment are a temperature of 155 degrees celsius, a pressure of 125 mpa, and a process time of 10 min.

The working principle and the beneficial effects of the technical scheme are as follows: the composite rubber base plate provided by the invention is mainly characterized in that an iron plate is embedded in a rubber base plate body, so that the physical performance of the composite rubber base plate is improved, the uniform stress of the whole base plate surface can be ensured when the whole base plate is under the action of an external force, the occurrence of concentrated stress is avoided, the double-filtering damping and noise-absorbing functions are better than those of a common rubber base plate, the stress state of the base plate can be changed, and the occurrence of bending deformation and shearing deformation is reduced. Meanwhile, the bearing area is increased, the compressive internal stress is reduced, the heat conduction efficiency is improved, the heat dissipation speed is accelerated, and the generation of heat concentration is avoided.

In addition, the surface of the rubber base plate body is provided with a primary groove and a secondary groove, namely, the contact shallow groove and the contact deep groove are alternately arranged, when a carrying train passes through under heavy load, the stress of the primary groove (the contact deep groove) changes, and when an empty carrying train passes through, the stress of the secondary groove (the contact shallow groove) changes, so that the fatigue performance of the rubber material can be exerted to the best point, and the service life of the product can be greatly prolonged.

The main material of the rubber base plate body is a formula which adopts about 70% of natural rubber, about 20% of butadiene styrene rubber, about 10% of butadiene rubber and other auxiliary materials, and the formula can enable the product performance to be less affected by the external environment.

The standard executed by the composite rubber cushion plate is implemented according to TD/T002-2000 standard when several key standards are executed while the standard (TB/T26261995) accords with the industry standard, and the specific steps are as follows:

shore A hardness execution TB/T2626-1995

b tensile strength MPa ≥ 14.5, executive TB/T002-2000, TB2626-1995 ≥ 12.5

c elongation at break of 300 or more, TB/T002-2000, TB2626-1995 of 250 or more

d constant compression set, execution TB2626-1995

Compression ratio of 50% at 100 ℃ for 24h

No more than 0.4 wear of E Akron, TB/T002-2000, TB/T2626-1995 no more than 0.6

f working resistance is more than or equal to 108, execution is TB/T002-2000, TB/T2626-1995 is more than or equal to 106

g hot air aging at 100 deg.C for 72 hr

Tensile Strength ≥ 12 for TB/T002-2000, TB/T2626-1995 ≥ 10

Elongation at break of 180 or more for TB/T002-2000, TB/T2626-1995 or more for 150 or more

h brittle temperature execution TB/T2626-1995

The composite rubber base plate can effectively control the dynamic and static rigidity ratio of a product to be below 2.0, the rebound resilience of the product is good, and the vibration transmission effect is also good.

The new material nano argil is used in the composite rubber cushion plate, and can limit the use parts of carbon black. The working resistance is improved by 100 times compared with the original standard. The initial weightlessness spy of the nano argil/rubber composite material is improved by 20-45 ℃ compared with that of the white carbon black/rubber composite material, the degradation termination temperature is improved by 50-90 ℃, and the nano argil can improve the thermal stability of the rubber compared with the white carbon black.

The composite rubber base plate and the preparation process thereof have the advantages of reasonable static rigidity design, good stress, high strength, long fatigue life, stable performance, good damping and noise absorbing performance and capability of effectively reducing the dynamic effect of the wheel rail.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.