CN114230870A - Formula for prolonging service life of capsule of forming machine - Google Patents
Formula for prolonging service life of capsule of forming machine Download PDFInfo
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- CN114230870A CN114230870A CN202111578586.6A CN202111578586A CN114230870A CN 114230870 A CN114230870 A CN 114230870A CN 202111578586 A CN202111578586 A CN 202111578586A CN 114230870 A CN114230870 A CN 114230870A
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- 239000002775 capsule Substances 0.000 title claims abstract description 44
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims abstract description 26
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229920006223 adhesive resin Polymers 0.000 claims abstract description 16
- 239000004840 adhesive resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 12
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 12
- 239000010692 aromatic oil Substances 0.000 claims abstract description 12
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 12
- 229920001194 natural rubber Polymers 0.000 claims abstract description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000008117 stearic acid Substances 0.000 claims abstract description 12
- 239000011787 zinc oxide Substances 0.000 claims abstract description 12
- 125000001038 naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 claims abstract description 11
- 241000872198 Serjania polyphylla Species 0.000 claims abstract description 7
- 239000006235 reinforcing carbon black Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 84
- 229920001971 elastomer Polymers 0.000 claims description 34
- 238000003825 pressing Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 14
- 239000006229 carbon black Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010074 rubber mixing Methods 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007963 capsule composition Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- VMFUMDXVTKTZQY-UHFFFAOYSA-N naphthalene-1-carbohydrazide Chemical compound C1=CC=C2C(C(=O)NN)=CC=CC2=C1 VMFUMDXVTKTZQY-UHFFFAOYSA-N 0.000 description 1
- -1 naphthoyl propionyl hydrazine Chemical compound 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- DXGIRFAFSFKYCF-UHFFFAOYSA-N propanehydrazide Chemical compound CCC(=O)NN DXGIRFAFSFKYCF-UHFFFAOYSA-N 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A formula for prolonging the service life of a capsule of a forming machine, belonging to the technical field of capsule production. The formula comprises the following components in percentage by weight: 100 parts of natural rubber, 35-50 parts of reinforcing carbon black with the particle size of 1nm series, 3.5-6 parts of aromatic oil, 1.5-4 parts of anti-aging agent 4020, 0.5-2 parts of anti-aging agent 3100, 1.5-4 parts of stearic acid, 1.5-4 parts of zinc oxide, 0.5-1.5 parts of naphthoyl hydrazide, 0.5-2 parts of resorcinol resin, 1.5-4 parts of adhesive resin promoter, 1.5-3 parts of sulfur powder and 1-2.5 parts of accelerator NS. The invention can prolong the service life of the formed capsule, delay the damage speed of the capsule after the capsule has a damage point and save the cost; the replacement frequency is reduced, and the field production continuity is improved. The invention has different increases of tearing strength, adhesive force and physical property.
Description
Technical Field
The invention belongs to the technical field of capsule production, and particularly relates to a formula for prolonging the service life of a capsule of a forming machine, which is suitable for turn-up and boosting capsules of a tire capsule drum forming machine.
Background
The bladder drum forming machine reversely wraps the tire side to the tire blank by utilizing the reverse wrapping and boosting bladder during tire forming, and the last step of tire blank forming is completed. In the process, the deformation of the edge folding area is about 300 percent and is 5 to 6 times of the deformation of rubber products such as tires, so that the damaged positions are mostly edge folding areas, and the surface of the cord thread is not coated with rubber during the damage. The average service life of the existing capsule is 3000 times (the times are calculated according to the number of produced tires).
Disclosure of Invention
Aiming at the technical problems, the formula for prolonging the service life of the capsule of the forming machine is provided, the service life of the formed capsule is prolonged, and the capsule damage speed after damage is delayed.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a formula for prolonging the service life of a capsule of a forming machine, which comprises the following components in percentage by weight: 100 parts of natural rubber, 35-50 parts of reinforcing carbon black with the particle size of 1mm series, 3.5-6 parts of aromatic oil, 1.5-4 parts of anti-aging agent 4020, 0.5-2 parts of anti-aging agent 3100, 1.5-4 parts of stearic acid, 1.5-4 parts of zinc oxide, 0.5-1.5 parts of naphthoyl hydrazide, 0.5-2 parts of resorcinol resin, 1.5-4 parts of adhesive resin promoter, 1.5-3 parts of sulfur powder and 1-2.5 parts of accelerator NS.
The preparation process of the rubber compound by adopting the formula for prolonging the service life of the capsule of the forming machine comprises the following steps:
a first-stage mixing processing technology:
s11, adding natural rubber, carbon black, an anti-aging agent, stearic acid, zinc oxide, naphthoyl hydrazide and resorcinol resin into an internal mixer for mixing, wherein the upper plug pressure of 0.5-0.6MPa is kept unchanged in the mixing process:
s12, first pressing: the rotor speed of the internal mixer is 40-50r/min, the mixing is carried out for 20-25s, and aromatic oil is added when the temperature reaches 105-;
s13, pressing for the second time: the rotor speed of the internal mixer is reduced to 40-45r/min, the mixture is mixed for 15-25 s, and the temperature reaches 125-135 ℃;
s14, third-time weight: the rotor speed of the internal mixer is 40-45r/min, the mixing is carried out for 15-20 s, and the temperature reaches 150-155 ℃ for rubber discharge;
the two-stage mixing processing technology comprises the following steps:
s21, adding the rubber material discharged after the first section of mixing processing into an internal mixer for mixing, wherein the upper plug pressure is kept constant at 0.5-0.6Mpa in the mixing process;
s22, first pressing: the rotor speed of the internal mixer is 45-50 r/min, the mixing lasts 25-35 s, and the temperature reaches 110-120 ℃;
s23, pressing for the second time: the rotor speed of the internal mixer is 40-50r/min, the mixing is carried out for 30-35 s, and the temperature reaches 150-155 ℃ for rubber discharge;
three-stage mixing process:
s31, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.3-0.4 MPa is kept unchanged in the mixing process:
s32, first pressing: the rotor speed of the internal mixer is 20-25 r/min, the mixing time is 35-45 s, and the temperature reaches 80-85 ℃;
s33, second-time weight pressing: the rotor speed of the internal mixer is 20-25 r/min, the mixing time is 35-45 s, and the temperature reaches 100-115 ℃.
The invention has the beneficial effects that:
1. the invention can prolong the service life of the formed capsule and delay the damage speed of the capsule after the capsule has a damage point;
2. the invention increases the tearing strength, the adhesive force and the physical properties (tensile property, stress at definite elongation and the like) to different degrees, and improves the tensile property of the capsule.
3. The invention can reduce the production cost, reduce the replacement frequency during use and improve the continuity of field production;
4. according to the invention, the service life of the capsule is prolonged, and the times of producing the capsule formula in the rubber mixing process are correspondingly reduced, so that the production efficiency of the rubber mixing process is improved;
5. the invention improves the service life of the capsule, reduces the vulcanizing times of the capsule correspondingly, saves electric energy and is low-carbon and environment-friendly.
Drawings
FIG. 1 is a schematic representation of the molecular association of naphthohydrazide of the present invention.
Fig. 2 is a schematic diagram of the tearing of a conventional capsule.
FIG. 3 is a schematic diagram of the tearing of the capsule of the present invention.
Fig. 4 is a schematic view of the adhesive force of a conventional capsule.
FIG. 5 is a schematic representation of the adhesion of the capsules of the present invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings.
Example 1: the invention relates to a formula for prolonging the service life of a capsule of a forming machine, which comprises the following components in percentage by weight: 100 parts of natural rubber, 35 parts of reinforcing carbon black with the particle size of 1nm series, 3.5 parts of aromatic oil, 1.5 parts of an anti-aging agent 4020, 0.5 part of an anti-aging agent 3100, 1.5 parts of stearic acid, 1.5 parts of zinc oxide, 0.5 part of naphthoyl hydrazide, 0.5 part of resorcinol resin, 1.5 parts of an adhesive resin promoter, 1.5 parts of common sulfur powder and 1 part of a promoter NS.
The natural rubber has high grade and good formula performances such as aging resistance, and the like, and the cigarette flakes 3# and 10# are adopted in the embodiment.
The invention adopts the series of reinforcing carbon black with the grain diameter of 1mm, the grain diameter of the carbon black is small, the reinforcing property is good, the carbon black is diffused and absorbed in the rubber along the acting force direction to form a uniform carbon black grid structure, and the reinforcing effect is favorably exerted.
According to the use characteristics of the capsule, the anti-aging agent 4020 which has a protection effect on oxygen and ozone, is good in flex crack resistance and has a short-term protection effect is adopted; meanwhile, the anti-aging agent 3100 which has good anti-flex cracking resistance and long-term protection effect and is difficult to frost is adopted as a protection system, and has the advantages of ozone protection and good flex-resistant cracking resistance.
The tear resistance and the aging resistance of the capsule can be improved by adding the naphthoyl propionyl hydrazine, and the heat generation is reduced; one end of the molecule of the propionyl hydrazine is a carbon black affinity body which is beneficial to combining with the carbon black; one end is a targeting structure, which is combined with the rubber macromolecule chain, as shown in figure 1.
The invention adopts resorcinol resin and adhesive resin promoter for improving the adhesive force between the sizing material and the fiber cord; the formaldehyde donor adhesive resin promoter and the formaldehyde acceptor resorcinol resin react at the vulcanization temperature to generate the adhesive resin with continuous reaction capability, and the resin further has double reactions with chemical bonds and intermolecular action of rubber and fiber cords to play an adhesive role.
The aromatic oil is used as a softening agent, and can improve the processability and the elongation at break in the formula performance.
The activating system consists of zinc oxide and stearic acid, can effectively play the role of an organic accelerator, reduce the using amount of the accelerator, shorten the vulcanizing time, have the vulcanizing reinforcing effect besides the vulcanizing activity effect, improve the crosslinking density of vulcanized rubber and improve the aging resistance of the vulcanized rubber.
The vulcanization system adopts a low-sulfur high-acceleration system, and the accelerator with good scorching resistance and quick vulcanization time is selected according to the vulcanization process characteristics of capsules vulcanized by pressure tanks, and meanwhile, the vulcanization system also has the characteristics of improving the tensile strength, the stretching strength and the aging resistance of the rubber material.
The invention adopts the preparation process of the rubber compound of the formula for prolonging the service life of the capsule of the forming machine, and the preparation process comprises the following steps:
a first-stage mixing processing technology:
s11, adding natural rubber, carbon black, an anti-aging agent, stearic acid, zinc oxide, naphthoyl hydrazide and resorcinol resin into an internal mixer for mixing, wherein the upper plug pressure of 0.5MPa is kept unchanged in the mixing process:
s12, first pressing: the rotor speed of the internal mixer is 50r/min, the mixing is carried out for 20s, and aromatic oil is added when the temperature reaches 105 ℃;
s13, pressing for the second time: the rotor speed of the internal mixer is reduced to 45r/min, the mixture is mixed for 15s, and the temperature reaches 125 ℃;
s14, third-time weight: the rotor speed of the internal mixer is 45r/min, the mixing is carried out for 15s, and the rubber is discharged when the temperature reaches 150 ℃;
the two-stage mixing processing technology comprises the following steps:
s21, adding the rubber material discharged after the first section of mixing processing into an internal mixer for mixing, wherein the upper plug pressure of 0.5Mpa is kept unchanged in the mixing process;
s22, first pressing: the rotor speed of the internal mixer is 45r/min, the mixing time is 25s, and the temperature reaches 110 ℃;
s23, pressing for the second time: the rotor speed of the internal mixer is 40r/min, the mixing is carried out for 30s, and the rubber is discharged when the temperature reaches 150 ℃;
three-stage mixing process:
s31, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.4MPa is kept unchanged in the mixing process:
s32, first pressing: the rotor speed of the internal mixer is 20r/min, the mixing time is 35s, and the temperature reaches 80 ℃;
s33, second-time weight pressing: the rotor speed of the internal mixer is 20r/min, the mixing time is 35s, and the temperature reaches 100 ℃.
The capsule prepared by the formula of the invention has the following properties:
1. tear strength (MPa):
the present invention/existing 108/92.8 ═ 1.16, as shown in fig. 2, the existing form of capsule failure is a transverse tear along 180 °; as shown in FIG. 3, the capsules produced by the present invention have a failure mode of 90 DEG corner tear, and the failure speed of the capsules in use is delayed.
2. Adhesion (N)
The present invention/existing 189/138-1.37, as shown in fig. 4, the failure mode of the existing capsule is: separating the rubber compound from the cord thread, wherein the rubber coating rate of the cord thread is 10 percent; as shown in fig. 5, the destruction form of the capsule prepared by the present invention is: the rubber material is separated from the cord thread, the rubber coating rate of the cord thread is 0%, the weak point is converted into the inner part of the cord thread from the contact position of the rubber material and the cord thread, and the damage speed of the capsule in use is delayed.
3. Physical properties (300% stress at definite elongation, tensile strength):
300% stress at definite elongation: the invention/present ═ 8.8/7.9 ═ 1.11;
tensile strength: the invention/present is 27.2/25.2 is 1.08;
the physical properties of the invention are slightly improved.
Example 2: the difference between this example and example 1 is: the formula for prolonging the service life of the capsule of the forming machine comprises the following components in percentage by weight: 100 parts of natural rubber, 50 parts of reinforcing carbon black with the particle size of 1mm series, 4 parts of aromatic oil, 2 parts of an anti-aging agent 4020, 1 part of an anti-aging agent 3100, 4 parts of stearic acid, 2.5 parts of zinc oxide, 1.5 parts of naphthoyl hydrazide, 1 part of resorcinol resin, 4 parts of an adhesive resin promoter, 3 parts of sulfur powder and 2.5 parts of a promoter NS.
The preparation process of the rubber compound comprises the following steps:
a first-stage mixing processing technology:
s11, adding natural rubber, carbon black, an anti-aging agent, stearic acid, zinc oxide, naphthoyl hydrazide and resorcinol resin into an internal mixer for mixing, wherein the upper plug pressure of 0.6MPa is kept unchanged in the mixing process:
s12, first pressing: the rotor speed of the internal mixer is 45r/min, the mixture is mixed for 22s, and aromatic oil is added when the temperature reaches 110 ℃;
s13, pressing for the second time: the rotor speed of the internal mixer is reduced to 43r/min, the mixture is mixed for 25s, and the temperature reaches 130 ℃;
s14, third-time weight: the rotor speed of the internal mixer is 45r/min, the mixing is carried out for 20s, and the temperature reaches 155 ℃ for rubber discharge;
the two-stage mixing processing technology comprises the following steps:
s21, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.55MPa is kept unchanged in the mixing process;
s22, first pressing: the rotor speed of the internal mixer is 50r/min, the mixing time is 35s, and the temperature reaches 120 ℃;
s23, pressing for the second time: the rotor speed of the internal mixer is 45r/min, the mixing is carried out for 32s, and the temperature reaches 152 ℃ for rubber discharge;
three-stage mixing process:
s31, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.4MPa is kept unchanged in the mixing process:
s32, first pressing: the rotor speed of the internal mixer is 25r/min, the mixing time is 40s, and the temperature reaches 83 ℃;
s33, second-time weight pressing: the rotor speed of the internal mixer is 23r/min, the mixing time is 40s, and the temperature reaches 115 ℃.
Example 3: the formula for prolonging the service life of the capsule of the forming machine is characterized in that: the components and contents are as follows: 100 parts of natural rubber, 40 parts of reinforcing carbon black with the particle size of 1mm series, 6 parts of aromatic oil, 4 parts of an anti-aging agent 4020, 2 parts of an anti-aging agent 3100, 2.5 parts of stearic acid, 4 parts of zinc oxide, 1 part of naphthoyl hydrazide, 2 parts of resorcinol resin, 3 parts of an adhesive resin promoter, 2 parts of sulfur powder and 2 parts of an accelerator NS.
The preparation process of the rubber compound comprises the following steps:
a first-stage mixing processing technology:
s11, adding natural rubber, carbon black, an anti-aging agent, stearic acid, zinc oxide, naphthoyl hydrazide and resorcinol resin into an internal mixer for mixing, wherein the upper plug pressure of 0.55MPa is kept unchanged in the mixing process:
s12, first pressing: the rotor speed of the internal mixer is 50r/min, the mixing lasts for 25s, and aromatic oil is added when the temperature reaches 115 ℃;
s13, pressing for the second time: the rotor speed of the internal mixer is reduced to 45r/min, the mixture is mixed for 20s, and the temperature reaches 135 ℃;
s14, third-time weight: the rotor speed of the internal mixer is 42r/min, the mixing is carried out for 18s, and the temperature reaches 152 ℃ for rubber discharge;
the two-stage mixing processing technology comprises the following steps:
s21, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.6Mpa is kept unchanged in the mixing process;
s22, first pressing: the rotor speed of the internal mixer is 47r/min, the mixing time is 30s, and the temperature reaches 115 ℃;
s23, pressing for the second time: the rotor speed of the internal mixer is 50r/min, the mixing is carried out for 35s, and the temperature reaches 155 ℃ for rubber discharge;
three-stage mixing process:
s31, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.4MPa is kept unchanged in the mixing process:
s32, first pressing: the rotor speed of the internal mixer is 22r/min, the mixing time is 45s, and the temperature reaches 85 ℃;
s33, second-time weight pressing: the rotor speed of the internal mixer is 25r/min, the mixing time is 45s, and the temperature reaches 110 ℃.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (2)
1. A formula for prolonging the service life of a capsule of a forming machine is characterized in that: the components and contents are as follows: 100 parts of natural rubber, 35-50 parts of reinforcing carbon black with the particle size of 1nm series, 3.5-6 parts of aromatic oil, 1.5-4 parts of anti-aging agent 4020, 0.5-2 parts of anti-aging agent 3100, 1.5-4 parts of stearic acid, 1.5-4 parts of zinc oxide, 0.5-1.5 parts of naphthoyl hydrazide, 0.5-2 parts of resorcinol resin, 1.5-4 parts of adhesive resin promoter, 1.5-3 parts of sulfur powder and 1-2.5 parts of accelerator NS.
2. A process for the preparation of a rubber batch using the formulation for increasing the service life of capsules in a molding machine according to claim 1, characterized in that: the method comprises the following steps:
a first-stage mixing processing technology:
s11, adding natural rubber, carbon black, an anti-aging agent, stearic acid, zinc oxide, naphthoyl hydrazide and resorcinol resin into an internal mixer for mixing, wherein the upper ram pressure of 0.5-0.6MPa is kept unchanged in the mixing process;
s12, first pressing: the rotor speed of the internal mixer is 40-50r/min, the mixing is carried out for 20-25s, and aromatic oil is added when the temperature reaches 105-;
s13, pressing for the second time: the rotor speed of the internal mixer is reduced to 40-45r/min, the mixture is mixed for 15-25 s, and the temperature reaches 125-135 ℃;
s14, third-time weight: the rotor speed of the internal mixer is 40-45r/min, the mixing is carried out for 15-20 s, and the temperature reaches 150-155 ℃ for rubber discharge;
the two-stage mixing processing technology comprises the following steps:
s21, adding the rubber material discharged after the first section of mixing processing into an internal mixer for mixing, wherein the upper plug pressure is kept constant at 0.5-0.6Mpa in the mixing process;
s22, first pressing: the rotor speed of the internal mixer is 45-50 r/min, the mixing lasts 25-35 s, and the temperature reaches 110-120 ℃;
s23, pressing for the second time: the rotor speed of the internal mixer is 40-50r/min, the mixing is carried out for 30-35 s, and the temperature reaches 150-155 ℃ for rubber discharge;
three-stage mixing process:
s31, adding the rubber material discharged after the two-stage mixing processing, the adhesive resin improver, the sulfur and the accelerator into an internal mixer for mixing, wherein the upper plug pressure of 0.3-0.4 MPa is kept unchanged in the mixing process:
s32, first pressing: the rotor speed of the internal mixer is 20-25 r/min, the mixing time is 35-45 s, and the temperature reaches 80-85 ℃;
s33, second-time weight pressing: the rotor speed of the internal mixer is 20-25 r/min, the mixing time is 35-45 s, and the temperature reaches 100-115 ℃.
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