CN220409722U - Plastic mold convenient for demolding - Google Patents
Plastic mold convenient for demolding Download PDFInfo
- Publication number
- CN220409722U CN220409722U CN202322054455.9U CN202322054455U CN220409722U CN 220409722 U CN220409722 U CN 220409722U CN 202322054455 U CN202322054455 U CN 202322054455U CN 220409722 U CN220409722 U CN 220409722U
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- plate
- mold
- ejector pin
- upper ejector
- insert
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- 239000004033 plastic Substances 0.000 title claims abstract description 43
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 8
- 239000002991 molded plastic Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a plastic mold convenient for demolding, which comprises a front mold and a rear mold, wherein the rear mold consists of a rear mold fixing plate, mold legs and a rear mold plate, wherein the mold legs and the rear mold plate are fixed on the rear mold fixing plate, a molding cavity is formed between the rear mold plate and the front mold plate, a mold insert which is in matched connection with a molded plastic part is arranged in the molding cavity, a through hole is arranged in the center of the rear mold fixing plate, an upper ejector plate and a lower ejector plate are arranged on the rear mold fixing plate and are pushed by an upper ejector rod of an injection molding machine to move, a return needle which extends into the rear mold plate is arranged on the upper ejector plate, a spring is sleeved between the bottom surface of the rear mold plate and the return needle between the upper ejector plate, and an ejector pin which can penetrate through the rear mold plate and extend to the lower ends of the plastic part and the mold insert is arranged on the upper ejector plate. According to the plastic part ejection device, the mold insert is matched and connected with the plastic part, and ejection force is respectively given to the mold insert and the plastic part through the ejector pin, so that the plastic part is ejected out rapidly and accurately; the arrangement of the return needle and the spring can ensure the quick and stable reset of the ejector pin, and improve the working efficiency.
Description
Technical Field
The utility model relates to the technical field of injection molds, in particular to a plastic mold convenient to demold.
Background
The existing injection mold is generally demolded by a thimble ejection mode, in this case, some products have a complex structure and cannot be ejected directly from the mold, as shown in fig. 1 and 2, the plastic products have a complex structure due to the internal threaded structure, and cannot be ejected directly by the thimble.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a plastic mold convenient for demolding, and solves the problems that a plastic product is complex in structure and cannot be demolded.
Based on the above problems, the technical scheme provided by the utility model is that the plastic mold convenient for demolding comprises a front mold and a rear mold, wherein the front mold consists of a front mold fixing plate, a material channel plate fixed on the front mold fixing plate and a front mold plate, the rear mold consists of a rear mold fixing plate, mold legs fixed on the rear mold fixing plate and a rear mold plate, a corresponding molding insert is arranged between the rear mold plate and the front mold plate, a mold insert matched and connected with a molded plastic part is arranged in the molding insert, a through hole is arranged in the center of the rear mold fixing plate, an upper ejector plate and a lower ejector plate are arranged on the rear mold fixing plate, the upper ejector plate and the lower ejector plate are pushed by an upper ejector rod of an injection molding machine to move, a return pin extending into the rear mold plate is arranged on the upper ejector plate, a spring is sleeved between the return pin between the bottom surface of the rear mold plate and the upper ejector plate, and an ejector pin capable of penetrating through the rear mold plate and the molding insert and extending to the lower ends of the plastic part and the mold insert.
The die insert consists of a connector and a screw rod piece perpendicular to the connector, and the screw rod piece and the plastic piece are in threaded fit connection into a whole.
At least two ejector pins for ejecting the plastic part and the mold insert are arranged for the combination of each mold insert and the plastic part.
And corresponding connecting holes and connecting bolts are respectively arranged at four corners of the upper ejector plate and the lower ejector plate, so that the upper ejector plate and the lower ejector plate are fixedly connected.
A guide post is fixed between the rear die fixing plate and the rear die plate, the guide posts are respectively arranged on two sides of the rear die fixing plate and the rear die plate, the top of each guide post extends into the rear die plate, the bottom of each guide post extends into the rear die fixing plate, first through holes for the guide posts to pass through are formed in the upper ejector pin plate and the lower ejector pin plate, bearings are arranged in the first through holes, and the upper ejector pin plate and the lower ejector pin plate slide up and down along the guide posts under the action of the upper ejector pins of the injection molding machine.
And a support column is fixed between the rear die fixing plate and the rear die plate, is arranged on the inner side of the guide column and is positioned on the same straight line with the guide column, the top surface of the support column is abutted against the bottom surface of the rear die plate, and the bottom surface of the support column is abutted against the top surface of the rear die fixing plate. And the upper ejector plate and the lower ejector plate are provided with second through holes which can pass through the support columns.
The utility model has the advantages and beneficial effects that: according to the quick and accurate ejection device, the die insert matched and connected with the plastic part is arranged, and ejection force is respectively given to the die insert and the plastic part through the ejector pins, so that the plastic part is quickly and accurately ejected.
The guide post and the support column are additionally arranged between the rear die fixing plate and the rear die plate, smooth movement of the upper ejector plate and the lower ejector plate is guaranteed, ejection smoothness of the ejector pins is guaranteed, quick and stable reset of the ejector pins can be guaranteed through arrangement of the return pins and the springs, and working efficiency is improved.
Drawings
FIG. 1 is a schematic view of a plastic part according to the present utility model.
Fig. 2 is a schematic structural view of a mold insert according to the present utility model.
FIG. 3 is a schematic view showing a combined structure of a mold insert and a plastic part according to the present utility model.
Fig. 4 is a schematic longitudinal section of the plastic mold of the present utility model.
Fig. 5 is a schematic view of the overall structure of the present utility model.
In the figure: 1. a mold insert; 2. a plastic member; 3. a front mold fixing plate; 4. a material channel plate; 5. a front template; 6. a rear template; 7. a mold foot; 8. a rear mold fixing plate; 9. returning a needle; 10. a spring; 11. an upper ejector plate; 12. a lower ejector plate; 13. and (5) a thimble.
Detailed Description
The following detailed description of specific embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 2-5, the technical scheme provided by the utility model is a plastic mold convenient for demolding, which comprises a front mold and a rear mold, wherein the front mold consists of a front mold fixing plate 3, a material channel plate 4 fixed on the front mold fixing plate 3 and a front mold plate 5, the rear mold consists of a rear mold fixing plate 8, mold legs 7 fixed on the rear mold fixing plate 8 and a rear mold plate 6, a molding insert which is wanted to be matched is arranged between the rear mold plate 6 and the front mold plate 5, a mold insert 1 which is matched and connected with a molded plastic part 2 is arranged in the rear mold molding insert, a through hole is arranged in the center of the rear mold fixing plate 8, an upper ejector pin plate 11 and a lower ejector pin plate 12 are arranged on the rear mold fixing plate 8, the upper ejector pin plate 11 and the lower ejector pin plate 12 are pushed by an ejector pin on an injection molding machine to move, a return pin 9 which extends into the rear mold plate 6 is arranged on the upper ejector pin plate 11, a spring 10 which can pass through the rear mold plate 6 and the rear mold insert and extends to the lower end of the mold insert 2 and the mold insert 1 is arranged on the upper ejector pin plate 11.
The die insert 1 consists of a connector and a screw rod piece perpendicular to the connector, and the screw rod piece is connected with the plastic piece 2 into a whole in a threaded fit manner.
At least two ejector pins for ejecting the plastic part 2 and ejecting the mold insert 1 are provided for each combination of the mold insert 1 and the plastic part 2.
Wherein, the four corners of the upper thimble plate 11 and the lower thimble plate 12 are respectively provided with corresponding connecting holes and connecting bolts, and the upper thimble plate 11 and the lower thimble plate 12 are fixedly connected.
Be fixed with the guide post between back mould fixed plate 8 and the back template 6, the guide post sets up respectively in the both sides of back mould fixed plate 8 and back template 6, and the guide post top extends to inside the back template 6, and the bottom extends to inside the back mould fixed plate 8, set up the first through-hole of accessible guide post on going up thimble board 11 and the lower thimble board 12, set up the bearing in the first through-hole, under the ejector pin's of injection molding machine ejector pin ejector force or spring 10 elasticity effect go up thimble board 11 and lower thimble board 12 and slide from top to bottom along the guide post, the setting of guide post guarantees the smooth and easy and the stability of ejecting and reseing.
Support columns are fixed between the rear die fixing plate 8 and the rear die plate 6, are arranged on the inner sides of the guide columns and are positioned on the same straight line with the guide columns, the top surfaces of the support columns are abutted to the bottom surfaces of the rear die plate 6, and the bottom surfaces of the support columns are abutted to the top surfaces of the rear die fixing plate 8. The upper thimble plate 11 and the lower thimble plate 12 are provided with second through holes which can pass through the supporting columns. The radius of the support column is larger than that of the guide column, and the support column plays a role in stabilizing the rear template 6.
The die is separated from the rear die plate 6 after injection molding, a slide block in the rear die molding insert, which is in butt joint with the side end of the plastic part 2, is withdrawn outwards to the limit bolt and separated from the plastic part 2, the ejector rod of the injection molding machine pushes the ejector plate 12 down, the compression spring 10, simultaneously, the return needle 9 and the ejector pin move forwards, the ejector pin ejects the combined body of the die insert 1 and the plastic part 2, the plastic part 2 and the die insert 1 are separated manually after ejection, demoulding is completed, and the upper ejector pin plate 11 and the lower ejector pin plate 12 are reset and move downwards under the elasticity of the spring 10, and the ejector pin is reset.
The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (6)
1. The utility model provides a plastic mold of convenient drawing of patterns, includes front mould and rear mould, and the front mould comprises front mould fixed plate, material way board and the front mould board of being fixed in on the front mould fixed plate, and the rear mould comprises rear mould fixed plate, the mould foot and the rear mould board of being fixed in on the rear mould fixed plate, sets up corresponding shaping mold insert, its characterized in that between rear mould board and the front mould board: the forming insert is internally provided with a die insert matched and connected with a forming plastic part, the center of a rear die fixing plate is provided with a through hole, an upper ejector pin plate and a lower ejector pin plate are arranged on the rear die fixing plate, the upper ejector pin plate and the lower ejector pin plate are pushed by an upper ejector pin of an injection molding machine to move, the upper ejector pin plate is provided with a return pin extending into a rear die plate, a spring is sleeved between the bottom surface of the rear die plate and the return pin between the upper ejector pin plate, and the upper ejector pin plate is provided with an ejector pin penetrating through the rear die plate and the rear die forming insert and extending to the lower end of the plastic part and the die insert.
2. The plastic mold facilitating demolding as claimed in claim 1, wherein: the die insert consists of a connector and a screw rod piece perpendicular to the connector, and the screw rod piece and the plastic piece are in threaded fit connection into a whole.
3. The plastic mold facilitating demolding as claimed in claim 1, wherein: at least two ejector pins for ejecting the plastic part and the mold insert are arranged for the combination of each mold insert and the plastic part.
4. The plastic mold facilitating demolding as claimed in claim 1, wherein: and corresponding connecting holes and connecting bolts are respectively arranged at four corners of the upper ejector plate and the lower ejector plate, so that the upper ejector plate and the lower ejector plate are fixedly connected.
5. The plastic mold facilitating demolding as claimed in claim 1, wherein: a guide post is fixed between the rear die fixing plate and the rear die plate, the guide posts are respectively arranged on two sides of the rear die fixing plate and the rear die plate, the top of each guide post extends into the rear die plate, the bottom of each guide post extends into the rear die fixing plate, first through holes for the guide posts to pass through are formed in the upper ejector pin plate and the lower ejector pin plate, bearings are arranged in the first through holes, and the upper ejector pin plate and the lower ejector pin plate slide up and down along the guide posts under the action of the upper ejector pins of the injection molding machine.
6. The plastic mold facilitating demolding as claimed in claim 1, wherein: the support column is fixed between the rear mould fixing plate and the rear mould plate, is arranged on the inner side of the guide column and is positioned on the same straight line with the guide column, the top surface of the support column is abutted to the bottom surface of the rear mould plate, the bottom surface of the support column is abutted to the top surface of the rear mould fixing plate, and the upper ejector pin plate and the lower ejector pin plate are provided with second through holes for the support column to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322054455.9U CN220409722U (en) | 2023-08-02 | 2023-08-02 | Plastic mold convenient for demolding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322054455.9U CN220409722U (en) | 2023-08-02 | 2023-08-02 | Plastic mold convenient for demolding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220409722U true CN220409722U (en) | 2024-01-30 |
Family
ID=89647601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322054455.9U Active CN220409722U (en) | 2023-08-02 | 2023-08-02 | Plastic mold convenient for demolding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220409722U (en) |
-
2023
- 2023-08-02 CN CN202322054455.9U patent/CN220409722U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |