CN111216370A - Processing method and forming die for rubber composite gasket with metal framework - Google Patents
Processing method and forming die for rubber composite gasket with metal framework Download PDFInfo
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- CN111216370A CN111216370A CN201911202539.4A CN201911202539A CN111216370A CN 111216370 A CN111216370 A CN 111216370A CN 201911202539 A CN201911202539 A CN 201911202539A CN 111216370 A CN111216370 A CN 111216370A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0022—Multi-cavity moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/02—Deburring or deflashing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/16—EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
Abstract
The invention discloses a processing method and a forming die for a rubber composite gasket with a metal framework, and belongs to the field of processing of rubber products. The invention relates to a method for processing a rubber composite gasket with a metal framework, which comprises the steps of coating a layer of first adhesive on the surface of the metal framework and drying the first adhesive before the metal framework is prevented from being placed in a die cavity, and coating a layer of second adhesive on the coating of the first adhesive and drying the second adhesive; the coating of first adhesive and the mutual adhesion of metal framework, the coating and the rubber adhesion of second adhesive, mutual adhesion between the coating of first adhesive and the coating of second adhesive to improve the bonding strength between metal framework and the rubber, and then improved the stability and the life of composite washer in the use. The forming die is used for processing and preparing the composite gasket, and the die core is moved simultaneously after processing, so that the composite gaskets in the die cavities are ejected out simultaneously, and the composite gasket is convenient to demould.
Description
Technical Field
The invention relates to the technical field of rubber product processing, in particular to a processing method and a forming die for a rubber composite gasket with a metal framework.
Background
The rubber and the metal are two materials with different properties, and the two materials are combined to be used as the composite gasket, so that the respective advantages of the rubber and the metal can be exerted, and the effect of '1 +1 > 2' is achieved. Among them, the rubber in the composite gasket mainly plays a role in vibration damping and deformation, the metal mainly plays a role in load transmission and load balancing, and the composite gasket is widely applied in some industrial fields, such as the fields of automobile industry and mechanical manufacturing industry. However, due to the limitation of domestic production technology, the production efficiency of the composite gasket combining rubber and metal is low, the rejection rate is high, and the technical requirements of related fields cannot be met in the production process, so that the composite gasket depends on the import to meet the domestic market requirements.
At present, a rubber composite gasket with a metal framework is a composite gasket commonly used in the related field, and rubber is bonded on the metal framework. For example, the invention provides a Chinese patent document named as a processing method (2018103704372) of a metal framework rubber gasket, the processing method of the application firstly processes the metal framework, then the metal framework is placed in a die cavity, a positioning pin penetrates through the metal framework, and finally, rubber materials are injected for vulcanization molding to obtain the rubber gasket.
Because the overall dimension and the thickness of the metal framework are smaller, the surface of the metal framework can not be subjected to sand blasting treatment, and the bonding strength of the ethylene propylene diene monomer rubber on the surface of the metal framework can be directly influenced. For a running automobile, once the ethylene propylene diene monomer rubber is separated from the metal framework in the use process of the composite gasket, a serious accident is easy to happen, and the result which is difficult to recover is generated.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect that the bonding strength between a metal framework and ethylene propylene diene monomer is insufficient after the ethylene propylene diene monomer composite gasket with the metal framework is vulcanized and molded in the prior art, and provides a processing method of the rubber composite gasket with the metal framework. This scheme is before the vulcanization shaping, at the surface coating two-layer different adhesive of metal framework to it is inseparabler to make the bonding ground connection between compound packing ring metal framework after the processing and the rubber, thereby improves its stability in the use.
The invention also aims to provide a forming die of the rubber composite gasket with the metal framework. The mold core is arranged in the mold cavity of the mold in a sliding mode, and after vulcanization molding is completed, the mold cores in the mold cavities are moved simultaneously, so that the multiple composite gaskets are ejected out simultaneously, and demolding with a product is facilitated.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a processing method of a rubber composite gasket with a metal framework, which comprises the steps of placing the metal framework in a die cavity of a forming die, then injecting a sizing material and vulcanizing and forming to prepare the composite gasket; the method is characterized in that: before the metal framework is placed, a layer of first adhesive is coated on the surface of the metal framework and dried, and then a layer of second adhesive is coated on the coating of the first adhesive and dried.
Further, the method specifically comprises the following steps:
cleaning and airing a metal framework, coating a layer of first adhesive on the surface of the metal framework in a spraying mode and drying the first adhesive, and then coating a layer of second adhesive on the coating of the first adhesive in a spraying mode and drying the second adhesive;
step two, assembling the forming die on a flat vulcanizing machine, placing the metal framework processed in the step one in a die cavity of the forming die, placing the rubber material of the rubber body in an injection cavity of the forming die, and then closing the forming die;
step three, starting a flat vulcanizing machine, driving the flat vulcanizing machine, pressing a lower die of a forming die upwards, feeding and filling a rubber material into a die cavity, and then starting vulcanization forming;
and step four, after the vulcanization molding is finished, closing the flat vulcanizing machine, opening the mold of the molding mold and taking out the composite gasket to finish the processing.
Further, in the first step, the metal framework is coated with a layer of first adhesive and then dried for 0.5-1 h at the temperature of 20-30 ℃; and coating a layer of second adhesive on the coating of the first adhesive, and drying for 0.5-1 h at 20-30 ℃.
Further, in the first step, the first adhesive is a CH205 adhesive, and the second adhesive is an RC202 adhesive or 233X adhesive.
Further, in the third step, the vulcanizing temperature of the plate vulcanizing machine is 170-180 ℃, the vulcanizing time is 8-12 minutes, and the vulcanizing pressure is 10-20 MPa.
Further, in the second step, the rubber material comprises the following components in parts by mass:
55-60 parts of ethylene propylene diene raw rubber; 2.5-3.5 parts of zinc oxide; 0.1-0.5 parts of stearic acid; 10-15 parts of fast extrusion carbon black; 4-8 parts of semi-reinforcing carbon black; 3-7 parts of precipitated white carbon black; 5-7 parts of calcined clay; 1-3 parts of an active agent; 0.05-1.2 parts of a silane coupling agent; 0.1-0.5 parts of coumarone; 1-2 parts of an anti-aging agent; 1-2 parts of an accelerator; 2-5 parts of a vulcanizing agent.
The forming die special for the processing method comprises an injection plug, an upper die, a middle die and a lower die, wherein an injection pressure cavity is formed between the injection plug and the upper die; after the upper die, the middle die and the lower die are closed, a plurality of die cavities are formed between the upper die and the middle die, die cores are arranged in the die cavities, the die cores are connected to the middle die in a sliding mode, and at least part of the metal framework is placed on the die cores.
Furthermore, the mold core is provided with a jacking part and a forming part positioned at the top end of the jacking part, and the forming part is clamped in a gap formed by the upper mold and the middle mold; the top border of shaping portion is provided with fixed step, the mold core with the bottom surface of last mould is in fixed step department forms the fixed slot, metal framework's border chucking is in the fixed slot.
Furthermore, V-shaped grooves are formed in the positions, corresponding to the upper step edges of the fixed steps, of the bottom surface of the upper die, and rhombic tearing grooves are formed between the upper step edges of the fixed steps and the bottom surface of the upper die.
Furthermore, a jacking part of the mold core penetrates out of the gap from a limiting hole of the middle mold, a through accommodating cavity is formed between the middle mold and the lower mold, and the bottom end of the jacking part is suspended in the accommodating cavity; the height of the mold core is larger than the thickness of the middle mold and smaller than the sum of the thicknesses of the middle mold and the lower mold.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention relates to a method for processing a rubber composite gasket with a metal framework, which comprises the steps of coating a layer of first adhesive on the surface of the metal framework and drying the first adhesive before the metal framework is prevented from being placed in a die cavity, and coating a layer of second adhesive on the coating of the first adhesive and drying the second adhesive; when the composite gasket is vulcanized, the coating of the first adhesive is adhered to the metal framework, the coating of the second adhesive is adhered to the rubber, and the coating of the first adhesive and the coating of the second adhesive are adhered to each other, so that the adhesive strength between the metal framework and the rubber is improved, the stability of the composite gasket in the using process is further improved, and the service life of the composite gasket is prolonged.
(2) According to the invention, a CH205 adhesive is used as a first adhesive, an RC202 adhesive or a 233X adhesive is used as a second adhesive, a peel strength test of a metal framework and rubber is carried out on the vulcanized composite gasket, the average peel strength of a plurality of composite gasket metal frameworks in different batches and the rubber is not lower than 11KN/m, and the peel strength of the composite gasket metal framework prepared by only coating one layer of common adhesive and the rubber is 7-8 KN/m.
(3) The forming die comprises an injection plug, an upper die, a middle die and a lower die, wherein an injection pressure cavity is formed between the injection plug and the upper die; the upper die, the middle die and the lower die are assembled to form a plurality of die cavities, die cores are arranged in the die cavities, the die cores are connected to the middle die in a sliding mode, and at least part of the metal framework is placed on the die cores. When the die is assembled, the die core can tightly push the metal framework placed on the die core against the bottom surface of the upper die, so that the metal framework is fixed; after the vulcanization processing is finished and the die is opened, the die cores are simultaneously moved, so that the composite washers in the die cavities are simultaneously ejected out, and the demolding processing of the composite washers is facilitated.
Drawings
FIG. 1 is a schematic view of a composite washer to be processed according to the present invention;
FIG. 2 is a schematic view of a metal skeleton structure of a composite washer to be processed according to the present invention;
FIG. 3 is a schematic structural view of a forming mold according to the present invention;
FIG. 4 is a schematic view showing the combination of the mold core, the upper mold, the middle mold and the metal framework in the present invention;
fig. 5 is a schematic structural view of a middle mold in the present invention.
The reference numerals in the schematic drawings illustrate: 100. a composite washer; 110. a convex foot; 111. a recess; 112. a flange; 120. a metal skeleton; 200. forming a mold; 210. filling a plug; 220. an upper die; 221. a first template; 222. a second template; 223. a glue injection port; 224. tearing the edge groove; 225. a connecting bolt; 230. a middle mold; 231. a mold pillar; 232. a mold core; 2321. a molding section; 2322. a jack-up portion; 2323. fixing the step; 240. and (5) a lower die.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
Referring to fig. 1, the rubber composite gasket with a metal framework to be processed according to the present invention is composed of a metal framework 120 and rubber coated on the metal framework 120, wherein the rubber is specifically ethylene propylene diene monomer. Referring to fig. 2, the metal frame 120 is specifically an annular structure with an opening, and two sides of the opening are respectively provided with a circular hole, after the metal frame 120 is placed in the mold cavity, when the rubber material is vulcanized, the rubber material can flow from one side of the metal frame 120 to the other side of the metal frame 120 from the circular hole, so as to form a coating on the metal frame 120. While the glue flowing to the other side of the metal skeleton 120 can form a bead 110 in the opening, as shown in fig. 1, in the middle of the bead 110 having a flange 112. Meanwhile, a notch 111 is formed at a position corresponding to the lug 110 on a side of the composite washer 100 away from the lug 110.
In order to process the composite gasket shown in fig. 1, a molding die of the present embodiment, referring to fig. 3, may specifically include an injection plug 210, an upper die 220, an intermediate die 230, and a lower die 240, and an injection cavity is formed between the injection plug 210 and the upper die 220. After the upper die 220, the middle die 230 and the lower die 240 are closed, a plurality of die cavities can be formed between the upper die 220 and the middle die 230, the shapes of the die cavities are consistent with the shape of the composite gasket 100, a die core 232 capable of sliding relative to the middle die 230 is arranged in each die cavity, and the die core 232 can eject the vulcanized composite gasket 100 after the die is opened, so that the demolding of a finished product is facilitated.
The upper mold 220 may be opened with a cavity for forming the protruding leg 110 of the composite gasket 100, the middle mold 203 is opened with a cavity for forming the body of the composite gasket 100, and the cavity of the upper mold 220 and the cavity of the middle mold 230 are communicated to form a cavity after the mold closing. The middle mold 203 is provided with a mold column 231, the mold column 231 extends into the cavity of the upper mold 220 to form a hollow structure in the lug 110, and a notch 111 is formed at a position corresponding to the lug 110 on a side of the composite washer 100 away from the lug 110.
In order to facilitate the clamping of a cavity conforming to the shape of the tang 110 on the upper mold 220, the upper mold 220 of the present embodiment may include a first mold plate 221 and a second mold plate 222, wherein the first mold plate 221 and the second mold plate 222 are respectively provided with a cavity corresponding to half of the tang 112, and then the first mold plate 221 and the second mold plate 222 are fixedly connected by a connecting bolt 225, such that a cavity conforming to the shape of the tang 110 is formed between the first mold plate 221 and the second mold plate 222.
As a further optimization, a circle of V-shaped grooves may be formed on the opposite sides of the first mold plate 221 and the second mold plate 222, the V-shaped grooves are arranged close to the mold cavity, and the V-shaped grooves on the first mold plate 221 and the second mold plate 222 can form a rhombic tear-edge groove 224 after the mold clamping. Therefore, after the vulcanization is completed, when the upper mold 220 and the middle mold 230 are separated, the tearing rib positioned in the tearing groove 224 and the flange 112 are automatically torn, so that the automatic tearing of the flash is realized, and the flash on the composite gasket 100 is not required to be manually removed.
In addition, the position corresponding to the mold cavity on the upper mold 220 is provided with a glue injection port 223, and the injection molding cavity is communicated with the mold cavity at the glue injection port 223, so that the glue can enter the mold cavity from the injection molding cavity. The glue injection port 223 may be a conical or cone-like structure, that is, the diameter of the upper port through which the glue injection port 223 and the pressure injection cavity are communicated is larger than that of the glue injection port 223 and the pressure injection cavityThe diameter of a lower opening communicated with the die cavity, wherein the diameter of an upper opening is
The diameter of the lower opening is
Thus, after the vulcanization is completed, when the upper mold 220 is detached from the injection plug 210, the leg 110 of the composite gasket 100 can be directly torn away from the residual glue in the injection molding cavity.
Referring to fig. 5, a plurality of cavities for forming the body of the composite gasket 100 are formed in an array in the middle mold 230 of the present embodiment, cavities for forming the protruding legs 110 are also formed in positions of the upper mold 220 corresponding to the cavities in the middle mold 230, and after the middle mold 230 and the upper mold 220 are closed, the cavities of the two are in one-to-one correspondence.
The mold core 232 specifically includes a jacking portion 2322, and a forming portion 2321 located at a top end of the jacking portion 2322, where the forming portion 2321 is specifically located in a gap formed between the middle mold 230 and the upper mold 220, that is, in a cavity of the middle mold 230. Before die assembly, the metal framework 120 is partially placed on the die core 232, specifically, the inner edge of the metal framework 120 is placed on the die core 232; after the dies are assembled, the top surface of the middle die 230 abuts against the bottom surface of the forming part 2321 of the die core 232, and the top surface of the metal framework 120 placed on the die core 232 abuts against the bottom surface of the upper die 220, so that the metal framework 120 is fixed. After the vulcanization is completed, the upper mold 220, the middle mold 230, and the lower mold 240 are detached, and then the jacking portion 2322 is moved, so that the mold core 232 is slid integrally with respect to the middle mold 230, and the ejection of the finished product is completed.
As a further optimization, referring to fig. 4, a fixing step 2323 may be disposed at the top end edge of the forming part 2321, an upper step surface of the fixing step 2323 is flat with the top surface of the forming part 2321, and the height of the fixing step 2323 is substantially the same as the thickness of the metal framework 120, so that when the edge of the metal framework 120 is placed on the fixing step 2323, the top surface of the metal framework 120 is flat with the top surface of the forming part 2321. After the die is closed, the forming part 2321 of the die core 232 and the upper die 220 form a fixing groove at the fixing step 2323, and the edge of the metal framework 120 is clamped in the fixing groove, so that the metal framework 120 is fixed.
In addition, referring to fig. 4, a fixing step may also be provided at a position of the middle mold 230 corresponding to the mold core 232, and a fixing groove formed at the fixing step by the middle mold 230 and the upper mold 220 is used for clamping an outer edge of the metal framework 120, thereby further improving the stability of fixing the metal framework 120 in the mold cavity.
V-shaped grooves are formed in the positions, corresponding to the upper step edge of the fixed step 2323, on the bottom surface of the upper die 220, and a rhombic tearing groove 224 is formed between the upper step edge of the fixed step 2323 and the bottom surface of the upper die 220. Therefore, after vulcanization is completed, when the upper mold 220 and the middle mold 230 are detached, the tearing rib located in the tearing groove 224 and the gasket 100 body are automatically torn away, so that automatic tearing away of the flash is realized, and manual removal of the flash on the composite gasket 100 is not needed.
Further, the jacking portion 2322 penetrates through the spacing hole formed in the middle mold 230 and the gap formed between the middle mold 230 and the upper mold 220, i.e., penetrates through the mold cavity and is located outside the mold cavity. Specifically, the diameter of the jacking portion 2322 is smaller than the aperture of the limiting hole, and the diameter of the forming portion 2321 is larger than the aperture of the limiting hole, so that the jacking portion 2322 can be clamped at the limiting hole. Meanwhile, a through accommodating cavity is formed between the middle mold 230 and the lower mold 240, and a bottom end of the jacking portion 2322 is suspended in the accommodating cavity. The height of the mold core 232 is greater than the thickness of the middle mold 230 and less than the sum of the thicknesses of the middle mold 230 and the lower mold 240, so that after vulcanization is completed, the upper mold 220, the middle mold 230 and the lower mold 240 are detached, the middle mold 230 is placed on a flat plate, and the flat plate can simultaneously eject the ejection parts 2322 of the mold cores 232 of a plurality of mold cavities into corresponding limiting holes, so that the forming parts 2321 of the mold cores 232 are ejected, and the body of the composite gasket 100 is ejected out of the mold cavity of the middle mold 230, thereby completing batch demolding of the finished composite gasket 100.
The metal framework 120 is made of 45# steel, the thickness is 1-2 mm, the surface needs to be subjected to nickel plating treatment, and the thickness of a nickel plating layer is 8-25 um. Due to the special material and shape of the metal framework 120, the surface of the metal framework cannot be subjected to sand blasting treatment, and the bonding strength of the ethylene propylene diene monomer rubber on the surface of the metal framework can be directly influenced.
In order to improve the bonding strength between the rubber and the metal framework, the embodiment also provides a processing method of the rubber composite gasket with the metal framework. The specific method is to coat a layer of first adhesive on the surface of the metal framework 120 and dry the first adhesive, then coat a layer of second adhesive on the coating of the first adhesive and dry the second adhesive, then place the metal framework 120 in the mold cavity of the forming mold 200, then inject the sizing material and vulcanize the forming to prepare the composite gasket 100. Therefore, when the composite gasket of the embodiment is vulcanized, the coating of the first adhesive is adhered to the metal framework, the coating of the second adhesive is adhered to the rubber, and the coating of the first adhesive is adhered to the coating of the second adhesive, so that the adhesive strength between the metal framework and the rubber is improved, and the stability and the service life of the composite gasket in the using process are further improved.
Example 1
In this embodiment, the specific steps of processing the composite gasket 100 by using the forming mold 200 are as follows:
step one, preparation of metal framework and sizing material
S1, the metal material is: 45# steel, 1mm thick metal skeleton raw material, through the stamping process preparation obtain semi-manufactured goods, through shake light, electroplating treatment obtain metal skeleton, wherein the surface of metal skeleton needs nickel plating treatment, and nickel content is 12%, and the cladding thickness is 8 um.
S2, cleaning the metal framework with gasoline, airing, coating a CH205 adhesive on the surface of the metal framework in a spraying mode, airing for 0.75 hour at the temperature of 23 ℃, then coating an RC202 adhesive on the coating of the CH205 adhesive, and airing for 0.75 hour at the temperature of 23 ℃.
S3, according to the size of the forming die 200; and cutting the composite gasket body rubber material by using a rubber cutting machine. In the embodiment, the compound gasket body rubber material adopts a rubber material square block with the thickness of 5mm and the weight of 180g, and the rubber material specifically comprises the following components in percentage by mass: 57 parts of ethylene propylene diene monomer raw rubber, 2.9 parts of zinc oxide, 0.6 part of stearic acid, 12.7 parts of fast extrusion carbon black, 5.8 parts of semi-reinforcing carbon black, 4.6 parts of precipitated white carbon black, 5.8 parts of calcined argil, 1.5 parts of an activator, 0.6 part of a silane coupling agent, 0.2 part of coumarone, 1.2 parts of an anti-aging agent, 1.4 parts of an accelerator and 3.9 parts of a vulcanizing agent.
Wherein the ethylene propylene diene monomer raw rubber is keltan2470 produced by Langsheng chemical (Shanghai) Co.Ltd; the zinc oxide is indirect zinc oxide produced by Zhenjiang white water chemistry limited company; stearic acid is produced by southern oil company in malaysia; fast extruding N550 produced by Tianjin Yibo Rui chemical Co., Ltd; the semi-reinforcing carbon black is N774 semi-reinforcing carbon black produced by Suzhou Baohua carbon black Limited company; the precipitated white carbon black is RS-150 produced by Shanghai Longman chemical industry Co.Ltd; the calcined pottery clay is produced by Shandong gold cudrania chemical Co., Ltd; the active agent is PEG-4000 provided by Shanghai Kayin chemical Co., Ltd; the silane coupling agent is KH-845-4 manufactured by Shanghai Michelin Biochemical technology Limited; the coumarone is produced by Shanghai Sen intensive chemical Co., Ltd; the anti-aging agent is an anti-aging agent 445 produced by Jiangsu Huada chemical group limited company; the accelerator is an accelerator TAC produced by Suzhou subfamily chemical reagents, Inc.; the vulcanizing agent is P45-B1-S manufactured by Shanghai Michelin Biotechnology, Inc.
Step two, filling the metal framework and the pump film body sizing material
Assembling the vulcanization forming die 200 on a flat vulcanizing machine, then placing the metal framework sprayed with the adhesive into a cavity, filling rubber body rubber material into an injection molding cavity, and then closing the injection plug, the first template and the second template;
step three, vulcanization molding
And after the second step, vulcanization molding is started, the vulcanizing machine drives the lower die of the die to press upwards, the rubber cavity of the composite gasket body is filled with rubber materials in the injection molding cavity through the upper rubber injection port and the lower rubber injection port, the vulcanization temperature of the vulcanizing machine is controlled to be 175 ℃, the vulcanization time is 9 minutes, the vulcanization pressure is 18MPa, and the product processing is completed after the vulcanization is finished, so that the ethylene propylene diene monomer and metal framework composite gasket is obtained.
Example 2
In this embodiment, the thickness of the metal skeleton in step S1 is 1.3mm, the content of nickel is 16%, and the thickness of the plating layer is 20 um.
In step S2, the surface of the metal framework is coated with CH205 adhesive and dried for 0.5 hour at the temperature of 20 ℃, then 233X adhesive is coated on the coating of the CH205 adhesive and dried for 0.5 hour at the temperature of 20 ℃.
In step S3, the rubber specifically comprises the following components in parts by mass: 55 parts of ethylene propylene diene monomer raw rubber, 2.5 parts of zinc oxide, 0.1 part of stearic acid, 10 parts of fast extrusion carbon black, 4 parts of semi-reinforcing carbon black, 3 parts of precipitated white carbon black, 5 parts of calcined argil, 1 part of an activator, 0.05 part of a silane coupling agent, 0.1 part of coumarone, 1 part of an anti-aging agent, 1 part of an accelerator and 2 parts of a vulcanizing agent.
And in the third step, the vulcanization temperature of a vulcanizing machine is controlled to be 170 ℃, the vulcanization time is controlled to be 8 minutes, the vulcanization pressure is controlled to be 10MPa, and the product processing is finished after the vulcanization is finished, so that the ethylene propylene diene monomer and metal framework composite gasket is obtained.
Example 3
In this embodiment, in step S1, the thickness of the metal skeleton is 1.5mm, the content of nickel is 18%, and the thickness of the plating layer is 25 um.
In the step S2, the surface of the metal framework is coated with CH205 adhesive and dried for 1 hour at the temperature of 30 ℃, and then the RC202 adhesive is coated on the coating of the CH205 adhesive and dried for 1 hour at the temperature of 30 ℃.
In step S3, the rubber specifically comprises the following components in parts by mass: 60 parts of ethylene propylene diene monomer raw rubber, 3.5 parts of zinc oxide, 0.5 part of stearic acid, 15 parts of fast extrusion carbon black, 8 parts of semi-reinforcing carbon black, 7 parts of precipitated white carbon black, 7 parts of calcined argil, 3 parts of an active agent, 1.2 parts of a silane coupling agent, 0.5 part of coumarone, 2 parts of an anti-aging agent, 2 parts of an accelerator and 5 parts of a vulcanizing agent.
And in the third step, the vulcanization temperature of a vulcanizing machine is controlled to be 170 ℃, the vulcanization time is controlled to be 8 minutes, the vulcanization pressure is controlled to be 10MPa, and the product processing is finished after the vulcanization is finished, so that the ethylene propylene diene monomer and metal framework composite gasket is obtained.
Comparative example
In this comparative example, only the surface of the metal skeleton was coated with a layer of adhesive, CILBOND36 adhesive from Cilbond, UK, in step S2, and then dried at 23 deg.C for 0.75 h. And then preparing the ethylene propylene diene monomer rubber and metal framework composite gasket based on the metal framework coated with the adhesive layer. After the test, the peel strength of the metal skeleton and the rubber of the composite gasket in the comparative example is 7.4 KN/m.
The composite gasket 100 prepared in the embodiments 1 to 3 has high strength, excellent oxidation resistance, ozone resistance and corrosion resistance, and the peel strength between the metal framework and the rubber is at least 11KN/m, which is superior to that of the composite gasket in the comparative example.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. A method for processing a rubber composite gasket with a metal framework comprises the steps of placing the metal framework (120) in a die cavity of a forming die (200), then injecting rubber material and vulcanizing and forming to prepare the composite gasket (100); the method is characterized in that: before the metal framework (120) is placed, a layer of first adhesive is coated on the surface of the metal framework and dried, and then a layer of second adhesive is coated on the coating of the first adhesive and dried.
2. The method for processing the rubber composite gasket with the metal framework as recited in claim 1, wherein the method comprises the following steps: the method specifically comprises the following steps:
step one, cleaning and airing a metal framework (120), coating a layer of first adhesive on the surface of the metal framework (120) in a spraying mode and drying the first adhesive, and then coating a layer of second adhesive on the coating of the first adhesive in a spraying mode and drying the second adhesive;
step two, assembling the forming die (200) on a flat vulcanizing machine, placing the metal framework (120) processed in the step one into a die cavity of the forming die (200), placing the rubber material of the rubber body into an injection cavity of the forming die (200), and then closing the forming die (200);
step three, starting a flat vulcanizing machine, pressing a lower die (5) of the forming die (200) upwards under the driving of the flat vulcanizing machine, enabling the rubber material to enter and fill a die cavity, and then starting vulcanization forming;
and step four, after the vulcanization molding is finished, closing the flat vulcanizing machine, opening the mold of the molding mold (200), and taking out the composite gasket (100) to finish the processing.
3. The method for processing the rubber composite gasket with the metal framework as recited in claim 2, wherein the method comprises the following steps: in the first step, the metal framework (120) is coated with a layer of first adhesive and then dried for 0.5-1 h at the temperature of 20-30 ℃; and coating a layer of second adhesive on the coating of the first adhesive, and drying for 0.5-1 h at 20-30 ℃.
4. The method for processing the rubber composite gasket with the metal framework as recited in claim 3, wherein the method comprises the following steps: in the first step, the first adhesive is a CH205 adhesive, and the second adhesive is an RC202 adhesive or a 233X adhesive.
5. The method for processing the rubber composite gasket with the metal framework as recited in claim 2, wherein the method comprises the following steps: in the third step, the vulcanizing temperature of the plate vulcanizing machine is 170-180 ℃, the vulcanizing time is 8-12 minutes, and the vulcanizing pressure is 10-20 MPa.
6. The method for processing the rubber composite gasket with the metal framework as recited in claim 2, wherein the method comprises the following steps: in the second step, the rubber material comprises the following components in parts by mass:
55-60 parts of ethylene propylene diene raw rubber; 2.5-3.5 parts of zinc oxide; 0.1-0.5 parts of stearic acid; 10-15 parts of fast extrusion carbon black; 4-8 parts of semi-reinforcing carbon black; 3-7 parts of precipitated white carbon black; 5-7 parts of calcined clay; 1-3 parts of an active agent; 0.05-1.2 parts of a silane coupling agent; 0.1-0.5 parts of coumarone; 1-2 parts of an anti-aging agent; 1-2 parts of an accelerator; 2-5 parts of a vulcanizing agent.
7. A forming die special for the processing method according to any one of claims 1 to 6, characterized in that: the injection molding device comprises an injection plug (210), an upper die (220), a middle die (230) and a lower die (240), wherein an injection pressure cavity is formed between the injection plug (210) and the upper die (220); after the upper die (220), the middle die (230) and the lower die (240) are assembled, a plurality of die cavities are formed between the upper die (220) and the middle die (230), a die core (232) is arranged in each die cavity, the die core (232) is connected to the middle die (230) in a sliding mode, and at least part of the metal framework (120) is placed on the die core (232).
8. The molding die of claim 7, wherein: the mold core (232) is provided with a jacking part (2322) and a forming part (2321) positioned at the top end of the jacking part (2322), and the forming part (2321) is clamped in a gap formed by the upper mold (220) and the middle mold (230); the top edge of the forming part (2321) is provided with a fixing step (2323), the mold core (232) and the bottom surface of the upper mold (220) form a fixing groove at the fixing step (2323), and the edge of the metal framework (120) is clamped in the fixing groove.
9. The molding die of claim 8, wherein: v-shaped grooves are formed in the positions, corresponding to the upper step edge of the fixed step (2323), of the bottom surface of the upper die (220), and the diamond-shaped tearing grooves (224) are formed between the upper step edge of the fixed step (2323) and the bottom surface of the upper die (220).
10. The molding die of claim 8, wherein: the jacking part (2322) of the mold core (232) penetrates out of the gap from the limiting hole of the middle mold (230), a through accommodating cavity is formed between the middle mold (230) and the lower mold (240), and the bottom end of the jacking part (2322) is suspended in the accommodating cavity; the height of the mold core (232) is larger than the thickness of the middle mold (230) and smaller than the sum of the thicknesses of the middle mold (230) and the lower mold (240).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832931A (en) * | 2020-12-22 | 2021-05-25 | 湖北航天飞行器研究所 | Solid rocket engine nozzle blocking cover and forming method |
| CN113334645A (en) * | 2021-05-24 | 2021-09-03 | 北京飞机维修工程有限公司 | Rubber roller vulcanization glue injection method in aircraft cargo compartment power driving assembly |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203092954U (en) * | 2012-12-27 | 2013-07-31 | 株洲振邦科技实业有限公司 | Four-cavity die of horizontal stop rubber gasket |
| CN203485391U (en) * | 2013-09-29 | 2014-03-19 | 成都盛帮密封件股份有限公司 | Die structure of bonded washer |
| CN104786436A (en) * | 2015-04-30 | 2015-07-22 | 南京金三力橡塑有限公司 | Processing mold and method of stainless combined washer |
| CN105313324A (en) * | 2014-07-09 | 2016-02-10 | 中西金属工业株式会社 | Machine component composed of metal and rubber and manufacturing method of same |
| CN106003705A (en) * | 2016-05-26 | 2016-10-12 | 宁波拓普集团股份有限公司 | Bonding method for metal workpiece with electroplated zinc-nickel alloy layer and rubber |
| CN106142581A (en) * | 2015-04-28 | 2016-11-23 | 宁波成德塑胶科技有限公司 | A kind of production technology of bush of swing arm |
| JP2017065042A (en) * | 2015-09-30 | 2017-04-06 | 住友理工株式会社 | Method for producing rubber gasket for fuel cell and fuel cell sealed body and aqueous release agent used for the same |
| CN107599319A (en) * | 2017-11-10 | 2018-01-19 | 株洲时代新材料科技股份有限公司 | A kind of rail dampener preparation method and primary and secondary structure automatic stripping die |
| CN108466388A (en) * | 2018-04-28 | 2018-08-31 | 南京金三力高分子科技有限公司 | A kind of washing machine feet and its vulcanization processing mold and processing method |
| CN109723820A (en) * | 2019-01-22 | 2019-05-07 | 石家庄贝克密封科技股份有限公司 | A kind of skeleton rubber sealing ring and its production mould |
-
2019
- 2019-11-29 CN CN201911202539.4A patent/CN111216370A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203092954U (en) * | 2012-12-27 | 2013-07-31 | 株洲振邦科技实业有限公司 | Four-cavity die of horizontal stop rubber gasket |
| CN203485391U (en) * | 2013-09-29 | 2014-03-19 | 成都盛帮密封件股份有限公司 | Die structure of bonded washer |
| CN105313324A (en) * | 2014-07-09 | 2016-02-10 | 中西金属工业株式会社 | Machine component composed of metal and rubber and manufacturing method of same |
| CN106142581A (en) * | 2015-04-28 | 2016-11-23 | 宁波成德塑胶科技有限公司 | A kind of production technology of bush of swing arm |
| CN104786436A (en) * | 2015-04-30 | 2015-07-22 | 南京金三力橡塑有限公司 | Processing mold and method of stainless combined washer |
| JP2017065042A (en) * | 2015-09-30 | 2017-04-06 | 住友理工株式会社 | Method for producing rubber gasket for fuel cell and fuel cell sealed body and aqueous release agent used for the same |
| CN106003705A (en) * | 2016-05-26 | 2016-10-12 | 宁波拓普集团股份有限公司 | Bonding method for metal workpiece with electroplated zinc-nickel alloy layer and rubber |
| CN107599319A (en) * | 2017-11-10 | 2018-01-19 | 株洲时代新材料科技股份有限公司 | A kind of rail dampener preparation method and primary and secondary structure automatic stripping die |
| CN108466388A (en) * | 2018-04-28 | 2018-08-31 | 南京金三力高分子科技有限公司 | A kind of washing machine feet and its vulcanization processing mold and processing method |
| CN109723820A (en) * | 2019-01-22 | 2019-05-07 | 石家庄贝克密封科技股份有限公司 | A kind of skeleton rubber sealing ring and its production mould |
Non-Patent Citations (2)
| Title |
|---|
| 纪奎江编: "《实用橡胶制品生产技术》", 31 March 2000, 化学工业出版社 * |
| 谢忠麟等: "《胶制品实用配方大全》", 31 March 1993, 化学工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832931A (en) * | 2020-12-22 | 2021-05-25 | 湖北航天飞行器研究所 | Solid rocket engine nozzle blocking cover and forming method |
| CN112832931B (en) * | 2020-12-22 | 2022-08-16 | 湖北航天飞行器研究所 | Solid rocket engine nozzle blocking cover and forming method |
| CN113334645A (en) * | 2021-05-24 | 2021-09-03 | 北京飞机维修工程有限公司 | Rubber roller vulcanization glue injection method in aircraft cargo compartment power driving assembly |
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