CN111421761A - Anti-deformation injection mold for plastic-coated metal product - Google Patents
Anti-deformation injection mold for plastic-coated metal product Download PDFInfo
- Publication number
- CN111421761A CN111421761A CN201911120200.XA CN201911120200A CN111421761A CN 111421761 A CN111421761 A CN 111421761A CN 201911120200 A CN201911120200 A CN 201911120200A CN 111421761 A CN111421761 A CN 111421761A
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- China
- Prior art keywords
- opening
- plastic
- insert
- arc structure
- deformation
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to the field of injection molding. An anti-deformation injection mold for a plastic-coated metal product comprises a mold main body for producing the plastic-coated metal product, wherein the plastic-coated metal product consists of a metal insert and a plastic part; the mould main body is provided with a supporting surface for supporting and positioning the metal insert, and a cavity for injection molding a plastic part is arranged at the supporting surface; the plastic part is provided with an opening arc structure, and no metal insert embedded support is arranged at the opening arc structure; the cavity is provided with an arc cavity for injection molding of the open arc structure, the volume of the arc cavity is larger than that of the open arc structure, and the part of the arc cavity, which is provided with the open arc structure more than the open arc structure, is used as a deformation compensation space; the deformation compensation space is positioned at the opening of the arc-shaped cavity. This patent has set up the deformation compensation space on the mould for can be better after the shaping shrink of opening circular arc structure be close with the drawing, thereby guarantee that the product installation has no problem, and then satisfy communication filter unit performance requirement.
Description
Technical Field
The invention relates to the field of injection molding, in particular to a mold.
Background
Many metal inserts package plastic part products can take place the deformation problem when injection moulding. For example: 1. the plastic part is provided with an opening arc structure, and when the opening arc structure is not covered by the base number insert and is supported inside, the plastic part can shrink inwards after being molded. 2. The metal insert is positioned inaccurately or insecure, which causes uneven injection molding of the plastic-coated metal product and deviation or deformation of the plastic part.
Disclosure of Invention
The invention aims to provide an anti-deformation injection mold for a plastic-coated metal product, so as to solve at least one problem.
An anti-deformation injection mold for a plastic-coated metal product comprises a mold main body for producing the plastic-coated metal product, wherein the plastic-coated metal product consists of a metal insert and a plastic part;
the mould main body is provided with a supporting surface for supporting and positioning the metal insert, and a cavity for injection molding the plastic part is arranged at the supporting surface;
the plastic part is provided with an opening arc structure, and no metal insert embedded support is arranged at the opening arc structure;
the cavity is provided with an arc cavity for injection molding of the opening arc structure, the volume of the arc cavity is larger than that of the opening arc structure, and the part of the arc cavity, which is more than the opening arc structure, is used as a deformation compensation space;
the deformation compensation space is positioned at the opening of the arc-shaped cavity.
The area and the shape of the deformation compensation space can be determined according to the mould flow analysis result of the plastic-coated metal product and the actual deformation trend and deformation.
This patent has set up the deformation compensation space on the mould for can be better after the shaping shrink of opening circular arc structure be close with the drawing, thereby guarantee that the product installation has no problem, and then satisfy communication filter unit performance requirement.
Preferably, the deformation compensation space is composed of a first subspace positioned above the opening and a second subspace positioned below the opening;
the first subspace is arc-shaped, extends from the highest point of the inner contour of the opening arc structure to the opening direction along the inner side wall of the opening arc structure on the opening side until the upper end face of the opening arc structure, and the cross-sectional area of the first subspace is gradually increased from top to bottom;
the second subspace extends from the lowest point of the inner contour of the opening circular arc structure to the opening direction along the inner side wall of the opening circular arc structure on the opening side until reaching the lower end face of the opening circular arc structure and covers the lower end face of the opening circular arc structure.
The mould main body comprises two sliding blocks, and the arc cavity is located at the junction of the two sliding blocks. Thereby facilitating the die sinking.
The mould main part still includes the first locating column of cross section square, the upper portion of first locating column is certainly the holding surface stretches out, the top of first locating column is equipped with decurrent recess, the recess is located the middle part of first locating column, the extending direction of recess with the direction of the central axis of first locating column is perpendicular, the tank bottom of recess with the holding surface is parallel, just the tank bottom arrives there is the clearance between the holding surface. Therefore, the first positioning column is utilized to position the metal insert in the x direction (the height of the metal insert is adjusted through the distance from the groove bottom to the supporting surface) and the y direction (the metal insert penetrates through the groove, so that the metal insert can be limited to move back and forth through the groove).
The metal insert comprises a middle insert positioned in the middle and side inserts connected to two sides of the main insert, the die body further comprises a second positioning column with a circular cross section, the upper portion of the second positioning column extends out of the supporting surface and abuts against the junction position of the main insert and the side inserts. Therefore, the positioning column is used for positioning the metal insert in the z direction (the second positioning column can limit the metal insert to move left and right).
As a preferable scheme, two first positioning columns and eight second positioning columns are arranged, wherein four second positioning columns are positioned in front of the middle insert, and the remaining four second positioning columns are positioned behind the middle insert;
at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert positioned on the left side, and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert positioned on the right side;
and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert on the left side, and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert on the right side.
Drawings
FIG. 1 is a schematic view of a plastic-coated metal product;
FIG. 2 is a schematic view of a metal insert of the product of FIG. 1;
FIG. 3 is a schematic structural view of a plastic part of the product in FIG. 1;
FIG. 4 is a cross-sectional view of the product of FIG. 1;
FIG. 5 is a perspective view of a portion of the mold containing a molded collapsed open arc structure at the arc cavity;
FIG. 6 is a schematic view of a partial structure of a mold body;
fig. 7 is a reference diagram illustrating the use of the structure of fig. 6.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific drawings.
Referring to fig. 1 and 2, the plastic-clad metal product is composed of a metal insert 2 and a plastic part 1. The plastic part 1 is provided with an opening arc structure 5, and the opening arc structure 5 is not provided with a metal insert 2 embedded support.
An anti-deformation injection mold for a plastic-coated metal product comprises a mold main body for producing the plastic-coated metal product; the mould main body is provided with a supporting surface for supporting and positioning the metal insert 2, and a cavity for injection molding the plastic part 1 is arranged at the supporting surface; the cavity is provided with an arc cavity for injection molding of the opening arc structure 5, the volume of the arc cavity is larger than that of the opening arc structure 5, and the part of the arc cavity, which is more than the opening arc structure 5, is used as a deformation compensation space; the deformation compensation space is located at the opening 6 of the arc-shaped cavity. The area and the shape of the deformation compensation space can be determined according to the mould flow analysis result of the plastic-coated metal product and the actual deformation trend and deformation.
In the figure, the deformation compensation space is formed by a first subspace 7 located above the opening, and a second subspace 8 located below the opening. The first subspace 7 is arc-shaped, and extends from the highest point of the inner contour of the opening arc structure 5 to the opening direction along the inner side wall of the opening arc structure 5 on the opening side until the upper end face of the opening arc structure 5, and the cross-sectional area of the first subspace 7 is gradually increased from top to bottom. The second subspace 8 extends from the lowest point of the inner contour of the open circular arc structure 5 to the opening direction along the inner side wall of the open circular arc structure 5 on the opening side, and reaches the lower end face of the opening of the open circular arc structure 5, and covers the lower end face of the opening of the open circular arc structure 5. The mould main body comprises two sliding blocks 9, and the arc cavity is positioned at the junction of the two sliding blocks 9. Thereby facilitating the die sinking.
The mould main part still includes the first locating column 10 that the cross section is square, the upper portion of first locating column 10 is certainly the holding surface stretches out, the top of first locating column 10 is equipped with decurrent recess 11, recess 11 is located the middle part of first locating column 10, the extending direction of recess 11 with the direction of the central axis of first locating column 10 is perpendicular, the tank bottom of recess 11 with the holding surface is parallel, just the tank bottom arrives there is the clearance between the holding surface. Therefore, the first positioning column 10 is used for positioning the metal insert 2 in the x direction (the height of the metal insert 2 is adjusted by the distance from the groove bottom of the groove 11 to the supporting surface) and the y direction (the metal insert 2 passes through the groove 11, so that the metal insert 2 can be limited to move back and forth by the groove 11).
The metal insert 2 comprises a middle insert 3 positioned in the middle and side inserts 4 connected to two sides of the main insert, the die body further comprises a second positioning column 12 with a circular cross section, and the upper portion of the second positioning column 12 extends out of the supporting surface and abuts against the junction position of the main insert and the side inserts 4. Therefore, the positioning columns are used for positioning the metal insert 2 in the z direction (the second positioning columns 12 can limit the metal insert 2 to move left and right).
In fig. 6 and 7, there are two first positioning posts 10 and eight second positioning posts 12, wherein four second positioning posts 12 are located in front of the middle insert 3, and the remaining four second positioning posts 12 are located behind the middle insert 3. Of the four second positioning pillars 12 located in front of the middle insert 3, at least one is located at the junction where the side insert 4 and the main insert are located on the left side, and at least one is located at the junction where the side insert 4 and the main insert are located on the right side. Of the four second positioning columns 12 located behind the middle insert 3, at least one is located at the junction where the side insert 4 and the main insert are located on the left side, and at least one is located at the junction where the side insert 4 and the main insert are located on the right side.
Note that: the opening arc structure 5 in this patent all refers to the structure after the shaping shrink. When the injection molding material is just injected into the cavity of the patent, the structure formed by the injection molding material in the arc-shaped cavity is not equal to the final opening arc structure. After the contraction is finished, the open circular arc structure is formed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An anti-deformation injection mold for a plastic-coated metal product comprises a mold main body for producing the plastic-coated metal product, wherein the plastic-coated metal product consists of a metal insert and a plastic part;
the mould main body is provided with a supporting surface for supporting and positioning the metal insert, and a cavity for injection molding the plastic part is arranged at the supporting surface;
the plastic part is provided with an opening arc structure, and no metal insert embedded support is arranged at the opening arc structure;
the cavity is provided with an arc cavity for injection molding of the opening arc structure, the volume of the arc cavity is larger than that of the opening arc structure, and the part of the arc cavity, which is more than the opening arc structure, is used as a deformation compensation space;
the deformation compensation space is positioned at the opening of the arc-shaped cavity.
2. The anti-deformation injection mold for the plastic-coated metal product as claimed in claim 1, wherein the shape of the deformation compensation space is determined according to the mold flow analysis result of the plastic-coated metal product and the actual deformation tendency and deformation amount.
3. The anti-deformation injection mold for the plastic-coated metal product as claimed in claim 1, wherein the deformation compensation space is composed of a first subspace located above the opening, and a second subspace located below the opening;
the first subspace is arc-shaped, extends from the highest point of the inner contour of the opening arc structure to the opening direction along the inner side wall of the opening arc structure on the opening side until the upper end face of the opening arc structure, and the cross-sectional area of the first subspace is gradually increased from top to bottom;
the second subspace extends from the lowest point of the inner contour of the opening circular arc structure to the opening direction along the inner side wall of the opening circular arc structure on the opening side until reaching the lower end face of the opening circular arc structure and covers the lower end face of the opening circular arc structure.
4. The anti-deformation injection mold for the plastic-coated metal product as claimed in claim 1, 2 or 3, wherein the mold body comprises two sliding blocks, and the arc-shaped cavity is located at the junction of the two sliding blocks.
5. The plastic-coated metal product anti-deformation injection mold according to claim 1, 2 or 3, wherein the mold body further comprises a first positioning column with a square cross section, the upper part of the first positioning column extends out of the supporting surface, a downward groove is formed in the top of the first positioning column, the groove is located in the middle of the first positioning column, the extending direction of the groove is perpendicular to the direction of the central axis of the first positioning column, the groove bottom of the groove is parallel to the supporting surface, and a gap exists between the groove bottom and the supporting surface.
6. The anti-deformation injection mold for the plastic-coated metal product as claimed in claim 5, wherein the metal insert comprises a middle insert located in the middle and side inserts connected to two sides of the main insert, the mold body further comprises a second positioning column with a circular cross section, and the upper part of the second positioning column extends out of the supporting surface and abuts against the junction position of the main insert and the side inserts.
7. The anti-deformation injection mold for the plastic-coated metal product according to claim 6,
eight second positioning columns are arranged, wherein four second positioning columns are positioned in front of the middle insert, and the rest four second positioning columns are positioned behind the middle insert;
at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert positioned on the left side, and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert positioned on the right side;
and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert on the left side, and at least one of the four second positioning columns is positioned at the junction of the side insert and the main insert on the right side.
8. The anti-deformation injection mold for the plastic-coated metal product as claimed in claim 5, wherein six of the eight side inserts are oppositely arranged two by two, and two of the first positioning posts are located, one of the first positioning posts is located at the right side of the group closest to the open circular arc structure, and the other one of the first positioning posts is located at the left side of the group second closest to the open circular arc structure.
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CN201911120200.XA CN111421761B (en) | 2019-11-15 | 2019-11-15 | Anti-deformation injection mold for plastic-coated metal product |
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CN201911120200.XA CN111421761B (en) | 2019-11-15 | 2019-11-15 | Anti-deformation injection mold for plastic-coated metal product |
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CN111421761B CN111421761B (en) | 2022-03-25 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115139445A (en) * | 2022-06-30 | 2022-10-04 | 深圳市中孚能电气设备有限公司 | Injection structure and miner's lamp |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN115139445A (en) * | 2022-06-30 | 2022-10-04 | 深圳市中孚能电气设备有限公司 | Injection structure and miner's lamp |
CN115139445B (en) * | 2022-06-30 | 2023-12-01 | 深圳市中孚能电气设备有限公司 | Injection molding structure and miner's lamp |
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