1. A preparation method of the damping rubber for the elevator sequentially comprises the following steps:

s1 mixing: weighing 100-150 g of natural rubber and 10-30 g of butadiene rubber, adding the natural rubber and the butadiene rubber into an internal mixer at 70-80 ℃ for mixing for 3-5 min, then adding 5-10 g of zinc oxide, 1-3 g of magnesium oxide, 3-6 g of stearic acid, 1-3 g of an anti-aging agent and 2-5 g of an accelerator, and continuing mixing for 3-5 min; finally, 20-30 g of carbon black, 20-30 g of white carbon black and 3-5 g of silane coupling agent are added for continuously mixing for 10-15 min to obtain a mixed material, the mixing rotating speed is 80-100 rpm, and the filling coefficient is 0.75-0.85;

s2 open mixing: loading the mixed material obtained in the step S1 into an open mill for discharging, wherein the roll temperature is 40-50 ℃, the roll distance is 1-2 mm, and cutting the mixed material into rubber sheets with the width of 50-60 mm;

s3 vulcanization: and (4) putting the rubber sheet obtained in the step S2 into a vacuum plate vulcanizing machine, adding 1-2 g of vulcanizing agent, and vulcanizing at the temperature of 150-180 ℃ and under the pressure of 15-20 MPa for 20-30 min to obtain the elevator damping rubber material.

2. The method for preparing elevator cushion rubber according to claim 1, wherein the silane coupling agent is Si-69 (bis- (triethoxysilyl) -propyl) tetrasulfide).

Background

An elevator is a vertical elevator powered by an electric motor and equipped with a box-like car for carrying people or cargo in a multi-story building. Elevators have become indispensable building equipments in high-rise buildings and public places as transportation means in the vertical direction. In order to reduce the vibration and noise between the elevator car and the elevator car frame, a damping device is arranged between the elevator car and the elevator car frame. Damping device adopts damping rubber among the prior art more, and rubber bonds together with elevator accessory promptly, but ordinary rubber is easy to fracture, and life is shorter, and the shock resistance is poor, lets the people feel strong vibrations very easily. At present, the damping rubber which can effectively reduce the vibration generated when the elevator is used, prolong the whole service life of the elevator and improve the safety factor of the whole use of the elevator is lacking in the market.

Chinese patent publication No. CN 105906952A discloses a preparation method of elevator damping rubber, which comprises the following raw materials in parts by weight: 20-25 parts of chloroprene rubber, 35-45 parts of ethylene propylene diene monomer, 15-30 parts of chromium element, 10-15 parts of chlorinated polyethylene, 5-18 parts of aluminum hydroxide solution, 25-28 parts of calcium carbonate, 8-9 parts of zinc oxide, 1-2 parts of stearic acid, 10-20 parts of 34% chlorosulfonated polyethylene, 1-3 parts of a promoter, 1.5-4 parts of an anti-aging agent, 8-25 parts of white carbon black, 9-16 parts of alkane oil, 3-10 parts of paraffin, 3-5 parts of a filler and 1-5 parts of a vulcanizing agent. The chromium element in the invention is a heavy metal with great toxicity, can easily enter human cells, can damage internal organs such as liver, kidney and the like and DNA, can be accumulated in human bodies, has carcinogenicity and can possibly induce gene mutation.

Disclosure of Invention

The invention aims to provide a preparation method of damping rubber for an elevator, the prepared damping rubber has good shock resistance, small compression permanent deformation and good fatigue durability, can be stably adhered to accessories of the elevator, effectively reduces the shock generated when the elevator is used, prolongs the service life of the whole elevator, and improves the safety factor of the whole elevator.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation method of the damping rubber for the elevator sequentially comprises the following steps:

s1 mixing: weighing 100-150 g of natural rubber and 10-30 g of butadiene rubber, adding the natural rubber and the butadiene rubber into an internal mixer at 70-80 ℃ for mixing for 3-5 min, then adding 5-10 g of zinc oxide, 1-3 g of magnesium oxide, 3-6 g of stearic acid, 1-3 g of an anti-aging agent and 2-5 g of an accelerator, and continuing mixing for 3-5 min; finally, 20-30 g of carbon black, 20-30 g of white carbon black and 3-5 g of silane coupling agent are added for continuously mixing for 10-15 min to obtain a mixed material, the mixing rotating speed is 80-100 rpm, and the filling coefficient is 0.75-0.85;

s2 open mixing: loading the mixed material obtained in the step S1 into an open mill for discharging, wherein the roll temperature is 40-50 ℃, the roll distance is 1-2 mm, and cutting the mixed material into rubber sheets with the width of 50-60 mm;

s3 vulcanization: and (4) putting the rubber sheet obtained in the step S2 into a vacuum plate vulcanizing machine, adding 1-2 g of vulcanizing agent, and vulcanizing at the temperature of 150-180 ℃ and under the pressure of 15-20 MPa for 20-30 min to obtain the elevator damping rubber material.

Preferably, the BET specific surface area of the white carbon black is 70-230 m² /g。

Preferably, the silane coupling agent is Si-69 (bis- (triethoxysilyl) -propyl) tetrasulfide).

Due to the adoption of the technical scheme, the invention has the following characteristics:

1. the invention combines butadiene rubber with natural rubber, which can obviously improve the shock resistance of the rubber and reduce the compression permanent deformation of the rubber; meanwhile, the magnesium oxide is added, so that the dispersibility of the filler in the rubber can be improved, and the processing performance of the rubber material can be improved, thereby improving the fatigue resistance and the thermal oxygen aging resistance.

2. The damping rubber for the elevator, which is prepared by the invention, can be firmly adhered to accessories of the elevator, so that the vibration generated during the use of the elevator is effectively reduced, the integral service life of the elevator is prolonged, and the safety coefficient of the integral use of the elevator is improved.

3. The invention is harmless to human body and has no pollution to environment in the production process.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Example 1

S1 mixing: weighing 100 g of natural rubber and 20g of butadiene rubber, adding the natural rubber and the butadiene rubber into a 72 ℃ internal mixer, mixing for 5min, then adding 8g of zinc oxide, 2g of magnesium oxide, 4g of stearic acid, 2g of an anti-aging agent and 3g of an accelerator, and continuing mixing for 5 min; finally, 25g of carbon black, 25g of white carbon black and 3g of silane coupling agent are added to be continuously mixed for 12min to obtain a mixed material, the mixing rotating speed is 90rpm, and the filling coefficient is 0.75;

s2 open mixing: loading the mixed material obtained in the step S1 into an open mill for blanking, wherein the roll temperature is 40 ℃, the roll distance is 1mm, and cutting the mixed material into rubber sheets with the width of 50 mm;

s3 vulcanization: and (4) putting the rubber sheet obtained in the step S2 into a vacuum plate vulcanizing machine, adding 1g of vulcanizing agent, and vulcanizing at the temperature of 170 ℃ and under the pressure of 18MPa for 25min to obtain the elevator damping rubber material.

Example 2

S1 mixing: weighing 120 g of natural rubber and 25g of butadiene rubber, adding the natural rubber and the butadiene rubber into a 75 ℃ internal mixer, mixing for 5min, then adding 7g of zinc oxide, 2g of magnesium oxide, 5g of stearic acid, 2g of an anti-aging agent and 4g of an accelerator, and continuing mixing for 5 min; finally, 28g of carbon black, 28g of white carbon black and 4g of silane coupling agent are added and continuously mixed for 15min to obtain a mixed material, the mixing rotating speed is 80rpm, and the filling coefficient is 0.80;

s2 open mixing: loading the mixed material obtained in the step S1 into an open mill for blanking, wherein the roll temperature is 45 ℃, the roll distance is 2mm, and cutting the mixed material into films with the width of 60 mm;

s3 vulcanization: and (4) putting the rubber sheet obtained in the step S2 into a vacuum plate vulcanizing machine, adding 1.5g of vulcanizing agent, and vulcanizing at the temperature of 175 ℃ and under the pressure of 20MPa for 22min to obtain the elevator damping rubber material.

Example 3

S1 mixing: weighing 130 g of natural rubber and 30g of butadiene rubber, adding the natural rubber and the butadiene rubber into a 78 ℃ internal mixer, mixing for 5min, then adding 8g of zinc oxide, 2.5g of magnesium oxide, 6g of stearic acid, 2g of an anti-aging agent and 4g of an accelerator, and continuing mixing for 5 min; finally, 22g of carbon black, 22g of white carbon black and 3g of silane coupling agent are added and continuously mixed for 15min to obtain a mixed material, the mixing rotating speed is 90rpm, and the filling coefficient is 0.80;

s2 open mixing: loading the mixed material obtained in the step S1 into an open mill for blanking, wherein the roll temperature is 50 ℃, the roll distance is 1mm, and cutting the mixed material into rubber sheets with the width of 55 mm;

s3 vulcanization: and (4) putting the rubber sheet obtained in the step S2 into a vacuum plate vulcanizing machine, adding 1.5g of vulcanizing agent, and vulcanizing at 180 ℃ and under the pressure of 18MPa for 28min to obtain the elevator damping rubber material.

The elevator vibration damping rubber prepared in the above examples was subjected to performance tests, and the test results are shown in the following table.

As can be seen from the table, the elevator damping rubber prepared by the invention has the advantages of good shock resistance, small compression permanent deformation, good elasticity and mechanical property, tensile elongation of more than 500 percent, tensile strength of more than 25MPa and fatigue resistance of more than 45 ten thousand times.

The present embodiments are to be considered as illustrative and not restrictive, and the scope of the patent is to be determined by the appended claims.