CN107962733B - Multiple multicolor injection molding or rubber coating forming process - Google Patents
Multiple multicolor injection molding or rubber coating forming process Download PDFInfo
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- CN107962733B CN107962733B CN201711249232.0A CN201711249232A CN107962733B CN 107962733 B CN107962733 B CN 107962733B CN 201711249232 A CN201711249232 A CN 201711249232A CN 107962733 B CN107962733 B CN 107962733B
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Classifications
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
- B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
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- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
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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
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- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
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- B29C45/2701—Details not specific to hot or cold runner channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
- B29L2031/5209—Toys
Abstract
The invention relates to the field of injection molding or encapsulation processing, in particular to a multi-time multicolor injection molding or encapsulation molding process, which comprises the following steps: s1, forming a double-circle closed annular multi-cavity positioning carrier and a primary color product; s2, multi-color injection molding or encapsulation; s3, discharging: the thimble props against the positioning thimble column, and the double-round closed annular multi-cavity positioning carrier is ejected out to realize discharging, so that the production efficiency of the process is improved by more than 30%, the total bad accumulation rate of the product is lower than 4% -5%, the environment protection can be improved, the advocation of multi-color injection molding for a plurality of times is avoided, paint spraying is avoided, the VOC emission is reduced, the environmental protection requirement of customers is far exceeded, meanwhile, the risk of heavy metal materials can be reduced, and the heavy metal substances in the paint are prevented from being transferred to the product; the production management cost is reduced, no trace against which the thimble abuts is left on the product, the product appearance is more perfect, and the demoulding is easier; the utilization rate of the raw materials can reach more than 98 percent and is far beyond the industrial level; and automatic production can be easily realized.
Description
Technical Field
The invention relates to the field of injection molding or encapsulation processing, in particular to a multi-time multicolor injection molding or encapsulation molding process.
Background
In the toy or gift toy industry, multiple times of multicolor injection molding rubber parts are produced by injection molding, and products are molded in different injection molding stages by designing and manufacturing first, so that the multiple times of multicolor injection molding rubber parts can be completed. The working process is mainly operated manually or mechanically, but no matter material is taken or a rubber part is hung for secondary injection molding, the existing injection molding operation mode is that a single part is placed in a single hole or multiple parts are placed in multiple holes, but the positioning design and the interaction design with high accuracy and relevance are lacked, so that the work is difficult to complete, and various different clamps or auxiliary equipment are still required. This results in a failure to improve the production efficiency, directly affects the production cost, and has an unstable product quality.
In the toy or gift toy industry, a large amount of paint is needed to be sprayed after the product is formed to obtain a multicolor product, the VOC emission of the product is difficult to reach the standard, the environmental protection requirement of a client is difficult to meet, the harm is generated to the body of a producer, the processes are multiple, and the cost is high.
Disclosure of Invention
The invention aims to provide a multi-time multi-color injection molding or rubber coating molding process aiming at the defects of the prior art.
In order to solve the above problems, the present invention provides the following technical solutions:
a multi-time multi-color injection molding or encapsulation molding process comprises the following steps:
s1, forming a double-circle closed annular multi-cavity positioning carrier and a primary color product: firstly, preparing a mould, wherein a double-circle closed annular multi-mould cavity mould core is arranged in the mould, the double-circle closed annular multi-mould cavity mould core is arranged according to the yield and the arrangement area of primary colour products in a circular array annular mode, the double-circle closed annular multi-mould cavity mould core comprises an inner ring and an outer ring, a plurality of mould cavities arranged in a circular array annular mode are arranged between the inner ring and the outer ring, a main runner with the same number as the primary colour products is arranged on the inner side of the inner ring, a secondary runner with the same number as the primary colour products is arranged on the outer side of the inner ring, sprue runners with the same number as the primary colour products are arranged beside the primary colour products and the secondary runners, in an injection molding machine, a rubber material is formed into a plurality of primary colour products and a double-circle closed annular multi-mould cavity positioning carrier through the main runner, the secondary runners and the sprue runners, and the plurality, forming a primary color product in each mold cavity, wherein all the primary color products are annularly distributed on the double-circular closed annular multi-mold-cavity positioning carrier, the double-circular closed annular multi-mold-cavity positioning carrier comprises an inner positioning ring and an outer positioning ring, and a plurality of positioning thimble columns are arranged on the inner positioning ring, the outer positioning ring and the side of the sprue runner;
s2, multi-color injection molding or encapsulation: according to the color design of the product, rubber materials with different colors sequentially pass through the same or different main runners, the same or different secondary runners and the same or different sprue runners for multiple times, injection molding or encapsulation is performed on different parts of a primary color product for multiple times to form different colors, the design position of a subsequent water inlet is different from or the same as that of a water inlet formed by primary color injection molding, and a required multiple-color injection molding or encapsulation molding product is obtained;
s3, discharging: the thimble props against the positioning thimble column, and the double-circle closed annular multi-cavity positioning carrier is ejected out, so that discharging is realized.
Further, the rubber material of the base color product is ABS or PP, and the rubber material used in S2 is any one of ABS, PP, PA, TPR or TP.
Further, the number of the mold cavities is 2-128.
Further, the mold is an aluminum alloy mold, and the double-circular closed annular multi-cavity mold core is a single mold or a compound mold.
Furthermore, at least one columnar chain is arranged on each of two sides of the mold, and the mold is pulled out or sent into the injection molding machine through the chains.
Further, the method comprises S4, removing a sprue channel and a water gap of a multi-time multi-color injection molding or encapsulation product, separating the multi-time multi-color injection molding or encapsulation product from the double-circular closed annular multi-mold cavity positioning carrier, and recycling the double-circular closed annular multi-mold cavity positioning carrier.
Further, S5, the multi-color injection molding or encapsulation product is subjected to appearance treatment to obtain a multi-color injection molding or encapsulation finished product.
Further, in S3, after the positioning carriers of the double-circular closed ring-shaped multi-mold cavity are ejected, the positioning carriers of the double-circular closed ring-shaped multi-mold cavity are taken out by the manipulator and automatically stacked on the product shelf.
Further, the sprue channel is a direct water inlet and/or a submerged water inlet.
Furthermore, a plurality of grooves and convex grooves are formed on the outer positioning ring and are alternately arranged, and positioning thimble posts on the outer positioning ring are formed on the bottom surface of the convex grooves
Has the advantages that: the multiple multicolor injection molding or rubber coating forming process has the following advantages:
1. the production efficiency is greatly improved, the product takes the double-circle closed annular multi-cavity positioning carrier as a carrier, the product with the same number of cavities is formed at one time, compared with the traditional single-piece single-cavity placing or multi-piece multi-cavity placing and forming process, the double-circle closed annular multi-cavity positioning carrier is ejected out, the products and the double-circle closed annular multi-cavity positioning carrier are ejected out at one time, the ejection time is saved, and compared with the traditional process, the production efficiency is improved by more than 30%;
2. through the design of the double-circle closed annular multi-cavity positioning carrier, the relevance among products is high, so that the product quality consistency is high, the quality stability is improved, and the benefit is improved, wherein the total bad accumulation rate of the products is lower than 4% -5%, and is more excellent compared with the total bad accumulation rate of 8% -12% in the traditional process;
3. the realization of multiple times of multicolor injection molding or encapsulation process can improve the environmental protection, advocate multiple times of multicolor injection molding, avoid spraying paint, reduce VOC emission, far exceed the environmental protection requirements of customers, and simultaneously, can also reduce the risk of heavy metal materials and avoid heavy metal objects in the paint from being transferred to products;
4. the production management cost is reduced, and the paint spraying process is avoided, so that the cost caused by the paint spraying process, including the cost of workers, testing and management, can be reduced;
5. the product is formed on the double-circle closed annular multi-mold-cavity positioning carrier, a plurality of positioning thimble posts are arranged on the inner positioning ring, the outer positioning ring and the sprue runner of the double-circle closed annular multi-mold-cavity positioning carrier, the thimble props against the positioning thimble posts to push out the double-circle closed annular multi-mold-cavity positioning carrier to realize demolding, and because the thimble does not directly prop against the product, the product does not have any thimble-propping residual mark, the product appearance is more perfect, the product is more attractive, and the demolding is easier;
6. the positioning carrier of the double-circular closed annular multi-mold cavity can be easily separated from the product, and the positioning carrier of the double-circular closed annular multi-mold cavity can be recycled, so that the utilization rate of raw materials can reach more than 98 percent and is far beyond the industrial level;
7. the automatic production can be easily realized, the structural design of the double-circle closed annular multi-mold-cavity positioning carrier is unique, the inner positioning ring can be uniformly stressed, the mechanical arm clamps the outer side wall of the inner positioning ring of the double-circle closed annular multi-mold-cavity positioning carrier, the double-circle closed annular multi-mold-cavity positioning carrier and a product can be taken out at one time, the automatic discharging is realized, the production efficiency can be greatly improved, the labor is saved, and the production cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a double-circle closed annular multi-cavity positioning carrier 1;
FIG. 2 is a schematic structural diagram of arrangement positions of the injection molding process for the first color of the doll;
FIG. 3 is a schematic structural diagram of arrangement positions of the secondary colors of the doll in the injection molding process;
FIG. 4 is a schematic structural diagram of arrangement positions of three-color doll injection molding processes;
FIG. 5 is a schematic structural diagram of arrangement positions of a four-color rubberizing process for a doll;
FIG. 6 is a schematic view of the mold structure of the arrangement position of the injection molding process for the first color of the doll;
FIG. 7 is a schematic view of a mold structure of the arrangement positions of the injection molding process for the secondary colors of the doll;
FIG. 8 is a schematic view of the mold structure of the three-color doll molding process arrangement positions;
fig. 9 is a schematic view of a mold structure of the chain-linked automated production design shown in fig. 8.
Detailed Description
The following detailed description of specific embodiments of the present invention is made with reference to the accompanying drawings and examples:
example 1
A multi-time multi-color injection molding or encapsulation molding process comprises the following steps:
s1, molding the double-circle closed annular multi-cavity positioning carrier 1 and the primary color product 2: firstly, a mould 3 is prepared, a double-circle closed annular multi-mould cavity mould core 4 is arranged in the mould 3, the double-circle closed annular multi-mould cavity mould core 4 is arranged in a circular array annular mode according to the output and the arrangement area of a primary color product 2, the double-circle closed annular multi-mould cavity mould core 4 comprises an inner ring 41 and an outer ring 42, a plurality of mould cavities 43 arranged in a circular array annular mode are arranged between the inner ring 41 and the outer ring 42, a main runner 44 with the same number as the primary color product 2 is arranged on the inner side of the inner ring 41, a secondary runner 45 with the same number as the primary color product is arranged on the outer side of the inner ring 41, a sprue runner 46 with the same number as the primary color product 2 is arranged beside the primary color product 2 and the secondary runner 45, and a rubber material is formed into a plurality of primary color products 2 and a double-circle closed annular multi-mould cavity positioning carrier 1 through the main runner 44, the, the primary color products 2 are connected with the double-circular closed annular multi-mold-cavity positioning carrier 1, one primary color product 2 is molded in each mold cavity 43, all the primary color products 2 are annularly distributed on the double-circular closed annular multi-mold-cavity positioning carrier 1, the double-circular closed annular multi-mold-cavity positioning carrier 1 comprises an inner positioning ring 11 and an outer positioning ring 12, and a plurality of positioning thimble columns 13 are arranged on the inner positioning ring 11, the outer positioning ring 12 and the side of the sprue runner 46;
s2, multi-color injection molding or encapsulation: according to the color design of the product, the rubber materials with different colors sequentially pass through the main runner 44, the secondary runner 45 and the sprue runner 46 for multiple times, different colors are formed by injection molding at different parts of the primary color product 2 for multiple times, and the subsequent water inlet design position is different from or the same as the water inlet design position of primary color injection molding, so that the required multiple-color injection molding product is obtained;
s3, discharging: the thimble props against the positioning thimble column 13 to push out the double-circle closed annular multi-cavity positioning carrier 1, so as to realize discharging.
With reference to fig. 1-9, a product takes a doll 2 as an example, the doll 2 comprises yellow skin 21, a red bow tie 22, brown hair 23 and black soft rubber clothes 24, by using the process, a doll with yellow skin as a first color and a double-circle closed annular multi-mold-cavity positioning carrier 1 are obtained through S1, a doll with red bow tie as a second color, a doll with brown hair as a third color and a doll with black soft rubber clothes as a fourth color are sequentially obtained through S2 to obtain finished products, and then the finished products are discharged through S3 to separate a single doll from the double-circle closed annular multi-mold-cavity positioning carrier 1.
By adopting the process, the production efficiency of the product is greatly improved, the product takes the double-circle closed annular multi-cavity positioning carrier 1 as a carrier, the product with the same number of cavities is formed at one time, and compared with the traditional single-piece single-cavity placing or multi-piece multi-cavity placing forming process, the ejection of the double-circle closed annular multi-cavity positioning carrier 1 is adopted, a plurality of products and the double-circle closed annular multi-cavity positioning carrier 1 are ejected at one time, the ejection time is saved, and the production efficiency is improved by more than 30%;
taking a single mold with 16 cavities as an example, the traditional preparation process needs 30-40s for completing the injection molding of the 16 cavities, and oil injection treatment is needed after the molding is completed to obtain various required colors; by adopting the forming process, 16 cavities can finish multicolor injection molding or encapsulation only in 16-22s, so that the efficiency is greatly improved.
Through the design of the double-circle closed annular multi-cavity positioning carrier 1, the relevance among products is high, so that the product quality consistency is high, the quality stability is improved, and the benefit is improved, wherein the total bad accumulation rate of the products is lower than 4% -5%, and is more excellent compared with the total bad accumulation rate of the traditional process which is 8% -12%;
the realization of multiple times of multicolor injection molding or encapsulation process can improve the environmental protection, advocate multiple times of multicolor injection molding, avoid spraying paint, reduce VOC emission, far exceed the environmental protection requirements of customers, and simultaneously, can also reduce the risk of heavy metal materials and avoid heavy metal objects in the paint from being transferred to products;
the production management cost is reduced, and the cost caused by the paint spraying process, including the cost of workers, testing and management, can be reduced due to the avoidance of paint spraying;
wherein, the primary color product 2 is designed to be a substrate by ABS or PP, namely a first color beer piece, and the subsequent sizing material can be designed to be a multi-color injection molding surface material, namely a multi-color beer piece, according to ABS or PP or PA or TPR or TPE.
Further, the number of the mold cavities is 2-128. The primary color products 2 are arranged in a circular array annular mode according to the required yield and the reasonable arrangement area, namely, the cavity arrangement design is carried out, the primary color products 2 take 2, 4, 8, 10, 12, 14, 16, 32, 64 or 128 cavities as design values, the number of the cavities is not limited, and the arrangement is reasonable as long as the area is enough.
Furthermore, the primary color product 2 is designed in a circular array ring-shaped arrangement manner, the primary color product 2 is added with the design and the positioning of the double-circular closed ring-shaped multi-cavity positioning carrier 1, and the primary color product 2 connects the related positioning design cavities 43 together because of the design. The design can simultaneously provide one-time extraction and placement of the products 2 with the primary colors of the multiple holes, effectively reduce the time required for extraction and placement, and obviously optimize the production benefit.
Furthermore, the design of the overall positioning and arrangement of the double-circle closed-loop production of the primary color product 2 is realized by arranging the primary color product 2 and a single-cavity single-branch uniflow sprue runner and synchronously selecting the arrangement of a direct water inlet and a submerged water inlet. Each primary product 2 is formed by a single-cavity single-branch uniflow runner. The design can provide balanced injection molding material simultaneously, effectively optimize the molding conditions of each mold cavity 43, and obviously improve the quality of the primary color product 2. The design can fully consider the recycling design of plastic materials at the same time, achieve the aim of carrying out multi-time multi-color injection molding, effectively recycle, separate and classify different materials and reuse, and obviously optimize the production cost.
Furthermore, a plurality of positioning thimble posts 13 are arranged on the inner positioning ring 11, the outer positioning ring 12 and the sprue runner 46 side, so that the ejection function is realized, and the positioning function is also realized in the mold 3. The product is formed on the double-circle closed annular multi-mold-cavity positioning carrier 1, a plurality of positioning thimble posts 13 are arranged on the inner positioning ring 11 of the double-circle closed annular multi-mold-cavity positioning carrier 1, the outer positioning ring 12 and the side of the sprue runner, the thimble abuts against the positioning thimble posts 13 to eject the double-circle closed annular multi-mold-cavity positioning carrier 1 to realize demolding, and because the thimble does not directly abut against the product, no thimble abuts against a residual mark on the product, the product is more perfect in appearance and more attractive, and demolding is easier.
Further, the mold 3 is an aluminum alloy mold, and the double-circular closed annular multi-cavity mold core 4 is a single mold or a multiple mold. The aluminum alloy die is used, so that a good heat conduction function is exerted; likewise, it also functions as a good defervescence conductor when cooled, which helps the conditions of the plastic material during forming, essentially, it can be optimized for 20% -30% of the time; in addition, the precision is improved, and the manufacturing of the aluminum alloy forming die is more detailed by matching with digital numerical control processing and producing the die with high precision through the machining precision and the engineering drawing file manufacturing level, particularly multi-hole manufacturing or compound die manufacturing; the mold making time is optimized, the aluminum alloy forming mold is manufactured by matching with digital numerical control processing, a plurality of processing procedures and repeated setting procedures are saved through the processing performance of a machine and the engineering programming manufacturing level, the manufacturing period is obviously shortened, and basically, the time can be optimized by 30-50%.
Further, at least one columnar chain 31 is respectively arranged on two sides of the mold 3, and the mold 3 is pulled out or sent into the injection molding machine through the chains 31. The closed ring-shaped integral injection-molded for each beer is connected to form a chain-connected production form or state, and the semi-automatic or full-automatic connector tool is used to continuously receive and pull out the injection-molded closed ring-shaped integral at the left end or the right end of the mold, so as to perform automatic production.
Further, the method comprises S4, removing sprue channels and water gaps of multiple multi-color injection molding or encapsulation products, separating the multiple multi-color injection molding or encapsulation products from the double-circular closed annular multi-mold cavity positioning carrier 1, and recycling the double-circular closed annular multi-mold cavity positioning carrier 1. The double-circular closed annular multi-mold-cavity positioning carrier 1 can be easily separated from the product, and the double-circular closed annular multi-mold-cavity positioning carrier 1 can be recycled, so that the utilization rate of raw materials can reach more than 98 percent and is far beyond the industrial level.
Further, S5, the multi-color injection molding or encapsulation product is subjected to appearance treatment to obtain a multi-color injection molding or encapsulation finished product.
Further, in S3, after the positioning carrier 1 of the double-circular closed ring-shaped multi-mold cavity is ejected, the positioning carrier 1 of the double-circular closed ring-shaped multi-mold cavity is taken out by the manipulator and automatically stacked on the product shelf. The automatic production can be easily realized, the structural design of the double-circle closed annular multi-mold-cavity positioning carrier 1 is unique, the inner positioning ring can be uniformly stressed, the outer side wall of the inner positioning ring 11 of the double-circle closed annular multi-mold-cavity positioning carrier 1 is clamped by the mechanical arm, the double-circle closed annular multi-mold-cavity positioning carrier 1 and a product can be taken out at one time, the automatic discharging is realized, the production efficiency can be greatly improved, the labor is saved, and the production cost is reduced
Further, the runner duct 46 is a direct water inlet and/or a submerged water inlet.
Further, a plurality of grooves 121 and convex grooves 122 are formed on the outer positioning ring 12, the grooves 121 and the convex grooves 122 are alternately arranged, and the positioning thimble rods 13 on the outer positioning ring 12 are formed on the bottom surface of the convex grooves 122.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (10)
1. A multi-time multi-color injection molding or rubber coating forming process is characterized by comprising the following steps:
s1, forming a double-circle closed annular multi-cavity positioning carrier and a primary color product: firstly, preparing a mould, wherein a double-circle closed annular multi-mould cavity mould core is arranged in the mould, the double-circle closed annular multi-mould cavity mould core is arranged according to the yield and the arrangement area of primary colour products in a circular array annular mode, the double-circle closed annular multi-mould cavity mould core comprises an inner ring and an outer ring, a plurality of mould cavities arranged in a circular array annular mode are arranged between the inner ring and the outer ring, a main runner with the same number as the primary colour products is arranged on the inner side of the inner ring, a secondary runner with the same number as the primary colour products is arranged on the outer side of the inner ring, sprue runners with the same number as the primary colour products are arranged beside the primary colour products and the secondary runners, in an injection molding machine, a rubber material is formed into a plurality of primary colour products and a double-circle closed annular multi-mould cavity positioning carrier through the main runner, the secondary runners and the sprue runners, and the plurality, forming a primary color product in each mold cavity, wherein all the primary color products are annularly distributed on the double-circular closed annular multi-mold-cavity positioning carrier, the double-circular closed annular multi-mold-cavity positioning carrier comprises an inner positioning ring and an outer positioning ring, and a plurality of positioning thimble columns are arranged on the inner positioning ring, the outer positioning ring and the side of the sprue runner;
s2, multi-color injection molding or encapsulation: according to the color design of the product, the rubber materials with different colors sequentially pass through the different main flow channels, the secondary flow channels and the sprue flow channel for multiple times, injection molding or encapsulation is performed on different parts of the primary color product for multiple times to form different colors, and the design position of a subsequent water inlet is different from or the same as that of a water inlet formed by injection molding of the primary color product, so that a required multiple-time multicolor injection molding or encapsulation molding product is obtained;
s3, discharging: the thimble props against the positioning thimble column, and the double-circle closed annular multi-cavity positioning carrier is ejected out, so that discharging is realized.
2. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: the sizing material of the primary color product is ABS or PP, and the sizing material used in S2 is any one of ABS, PP, PA, TPR or TP.
3. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: the number of the mold cavities is 2-128.
4. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: the die is an aluminum alloy die, and the double-circle closed annular multi-die-cavity die core is a single die or a compound die.
5. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: at least one columnar chain is arranged on each of the two sides of the mold, and the mold is pulled out or sent into the injection molding machine through the chains.
6. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: and S4, removing a sprue channel and a water gap of a multi-time multi-color injection molding or encapsulation product, separating the multi-time multi-color injection molding or encapsulation product from the double-circular closed annular multi-mold-cavity positioning carrier, and recycling the double-circular closed annular multi-mold-cavity positioning carrier.
7. The multiple multi-shot, multi-color injection or over-molding process of claim 6, wherein: and S5, performing appearance treatment on the multi-color injection or encapsulation product to obtain a multi-color injection or encapsulation finished product.
8. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: in S3, after the positioning carriers of the double-circular closed ring-shaped multi-mold-cavity are ejected out, the positioning carriers of the double-circular closed ring-shaped multi-mold-cavity are taken out by the manipulator and are automatically stacked on the product shelf.
9. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: the sprue channel is a direct water inlet and/or a submerged water inlet.
10. The multiple multi-shot, multi-color injection or over-molding process of claim 1, wherein: the outer positioning ring is provided with a plurality of grooves and convex grooves in a forming mode, the grooves and the convex grooves are alternately arranged, and the positioning thimble posts on the outer positioning ring are formed on the bottom surface of the convex grooves.
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| CN112917818A (en) * | 2021-01-20 | 2021-06-08 | 许韦奇 | Multicolor injection molding edge-opening encapsulation production process |
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