CN113246368A - Method for solving problem of adhesive film formed by encapsulating and injection molding soft rubber material - Google Patents
Method for solving problem of adhesive film formed by encapsulating and injection molding soft rubber material Download PDFInfo
- Publication number
- CN113246368A CN113246368A CN202110505843.7A CN202110505843A CN113246368A CN 113246368 A CN113246368 A CN 113246368A CN 202110505843 A CN202110505843 A CN 202110505843A CN 113246368 A CN113246368 A CN 113246368A
- Authority
- CN
- China
- Prior art keywords
- air
- mold
- coating layer
- rubber coating
- mold core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000002313 adhesive film Substances 0.000 title claims abstract description 5
- 238000010073 coating (rubber) Methods 0.000 claims abstract description 20
- 239000011247 coating layer Substances 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract 2
- 230000001070 adhesive effect Effects 0.000 claims abstract 2
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
Images
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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C45/34—Moulds having venting means
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/43—Removing or ejecting moulded articles using fluid under pressure
Abstract
The invention discloses a method for solving the problem of adhesive film encapsulation and injection molding of a soft rubber material.A plurality of air holes with the radius of 0.2mm-0.3mm are arranged in a mold core of a front mold and are arranged along a splicing line of a plastic piece and an adhesive coating layer; the plurality of air holes are communicated to the same air chamber, and a one-way air valve is arranged in a pipeline for connecting the air chamber with an external air source; the rear mold is separated from the front mold, the air valve is opened by the control valve, high-pressure air flow blows into the front mold from the air hole to separate the plastic part from the mold core to form a gap, the air flow gradually enters between the rubber coating layer and the mold core along the gap, and the rubber coating layer is finally separated from the mold core along with the continuous injection of the air flow to realize the demolding of the rubber coating layer. Blowing air to the plastic part and the rubber coating layer can not cause surface marks of the surface product, thus ensuring the appearance of the product and realizing smooth demoulding.
Description
Technical Field
The invention belongs to the technical field of rubber coating injection molding, and particularly relates to a rubber coating injection molding process for a soft rubber material.
Background
The surface of a local shell of the household appliance is coated with a layer of soft rubber material (PVC, TPE, TPU …) so as to improve the beauty and hand feeling of the appliance. The soft rubber material is coated on the plastic part by adopting a rubber coating injection molding process, but the soft rubber material has higher viscosity in a high-temperature melting state, if the coating area is too large, particularly the surface of the product is completely covered with the soft rubber, the rubber coating material is easy to adhere to the front mold, and the mold is difficult to demould under the condition that the rear mold can not be made into a structure of a rivet (pulling the product on the rear mold). The addition of an ejection mechanism to the front mold destroys the surface appearance of the encapsulating layer, and therefore a new injection molding process is required to solve the problem of mold sticking.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method for solving the problem of the adhesive film encapsulated and injected by soft rubber materials.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for solving the problem of encapsulating and injection molding a mucosa by a soft rubber material is characterized in that a plurality of air holes with the radius of 0.2mm-0.3mm are arranged in a die core of a front die, and the air holes are arranged along a splicing line of a plastic piece and an encapsulating layer; the air holes are communicated to the same air chamber, and a one-way air valve is arranged in a pipeline for connecting the air chamber with an external air source; the rear mold is separated from the front mold, the air valve is opened by the control valve, high-pressure air flow blows into the front mold from the air hole to separate the plastic part from the mold core to form a gap, the air flow gradually enters between the rubber coating layer and the mold core along the gap, and the rubber coating layer is finally separated from the mold core along with the continuous injection of the air flow to realize the demolding of the rubber coating layer.
Compared with the prior art, the invention has the beneficial effects that: blowing air to the plastic part and the rubber coating layer can not cause surface marks of the surface product, thus ensuring the appearance of the product and realizing smooth demoulding.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic view of a vacuum cleaner housing in an embodiment;
fig. 2 is a schematic diagram of a mold core of a front mold in an embodiment.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example one
Fig. 1 shows a housing of a vacuum cleaner, which includes a plastic body 10 and an encapsulating layer 20, wherein the plastic body has a boss 30 exposed out of the encapsulating layer. Mould a body and adopt the PP material, the encapsulating layer adopts the TPE material, and the customer requires to mould a body and the surface on encapsulating layer and can not have any impression.
And a front mold of the corresponding rubber coating mold is not provided with a traditional ejection mechanism, and the plastic part body is placed into the mold and subjected to mold closing and injection molding. After injection molding, the mold is opened, the rear mold is withdrawn, and the product is left in the front mold due to the viscosity of the encapsulating layer.
Referring to fig. 2, a plurality of air holes 40 with the radius of 0.2mm-0.3mm are arranged in the mold core of the front mold, and the air hole bosses are arranged with the splicing lines of the rubber coating layer. The air holes are communicated to the same air chamber, and a one-way air valve is arranged in a pipeline for connecting the air chamber with an external air source. After the rear mold is separated from the front mold, the control valve opens the one-way air valve, high-pressure air flow blows into the front mold from each air hole simultaneously to separate the plastic part from the mold core to form a gap, the air flow advances along the gap to gradually enter between the rubber coating layer and the mold core, and the rubber coating layer is finally separated from the mold core along with continuous injection of the air flow to realize demoulding of the rubber coating layer. Blowing does not cause surface marks of the surface product, so that the appearance of the product can be ensured, and smooth demolding can be realized.
Example two
The method in the first embodiment is also suitable for injection molding products, such as transparent injection molding products, of which the plastic parts are easy to adhere to the mold and the surfaces cannot be provided with thimble structures.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A method for solving the problem of the injection molding of the adhesive film encapsulated by the soft rubber material is characterized in that a plurality of air holes with the radius of 0.2mm-0.3mm are arranged in a mold core of a front mold, and the air holes are arranged along the splicing line of a plastic piece and an adhesive coating layer; the air holes are communicated to the same air chamber, and a one-way air valve is arranged in a pipeline for connecting the air chamber with an external air source; the rear mold is separated from the front mold, the air valve is opened by the control valve, high-pressure air flow blows into the front mold from the air hole to separate the plastic part from the mold core to form a gap, the air flow gradually enters between the rubber coating layer and the mold core along the gap, and the rubber coating layer is finally separated from the mold core along with the continuous injection of the air flow to realize the demolding of the rubber coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505843.7A CN113246368A (en) | 2021-05-10 | 2021-05-10 | Method for solving problem of adhesive film formed by encapsulating and injection molding soft rubber material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110505843.7A CN113246368A (en) | 2021-05-10 | 2021-05-10 | Method for solving problem of adhesive film formed by encapsulating and injection molding soft rubber material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113246368A true CN113246368A (en) | 2021-08-13 |
Family
ID=77222654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110505843.7A Pending CN113246368A (en) | 2021-05-10 | 2021-05-10 | Method for solving problem of adhesive film formed by encapsulating and injection molding soft rubber material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113246368A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205201977U (en) * | 2015-10-23 | 2016-05-04 | 深圳市安高模具有限公司 | Double -colored collection wood is blown and is prevented sticking structure |
| CN205272428U (en) * | 2015-12-15 | 2016-06-01 | 东莞烨嘉电子科技有限公司 | Flexible glue mould ejecting device |
| CN107856257A (en) * | 2017-11-14 | 2018-03-30 | 中山市高远精密模具有限公司 | A kind of mould inflatable body |
| CN110815744A (en) * | 2018-08-14 | 2020-02-21 | 深圳市银宝山新科技股份有限公司 | Injection mold without ejector plate and product demolding method thereof |
| CN211030988U (en) * | 2019-05-22 | 2020-07-17 | 东莞市弘科模具有限公司 | Rubber coating mould for injection molding part |
-
2021
- 2021-05-10 CN CN202110505843.7A patent/CN113246368A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205201977U (en) * | 2015-10-23 | 2016-05-04 | 深圳市安高模具有限公司 | Double -colored collection wood is blown and is prevented sticking structure |
| CN205272428U (en) * | 2015-12-15 | 2016-06-01 | 东莞烨嘉电子科技有限公司 | Flexible glue mould ejecting device |
| CN107856257A (en) * | 2017-11-14 | 2018-03-30 | 中山市高远精密模具有限公司 | A kind of mould inflatable body |
| CN110815744A (en) * | 2018-08-14 | 2020-02-21 | 深圳市银宝山新科技股份有限公司 | Injection mold without ejector plate and product demolding method thereof |
| CN211030988U (en) * | 2019-05-22 | 2020-07-17 | 东莞市弘科模具有限公司 | Rubber coating mould for injection molding part |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |