CN220523856U - Vacuum breaking structure of injection molding part - Google Patents
Vacuum breaking structure of injection molding part Download PDFInfo
- Publication number
- CN220523856U CN220523856U CN202321970188.3U CN202321970188U CN220523856U CN 220523856 U CN220523856 U CN 220523856U CN 202321970188 U CN202321970188 U CN 202321970188U CN 220523856 U CN220523856 U CN 220523856U
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- injection molding
- plate
- base plate
- vacuum breaking
- breaking structure
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 68
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model relates to the technical field of workpiece injection molding and processing, and discloses a vacuum breaking structure of an injection molding piece. The utility model has the beneficial effects of improving the production quality and the production efficiency of injection molding products and reducing the production cost.
Description
Technical Field
The utility model relates to the technical field of workpiece injection molding, in particular to a vacuum breaking structure of an injection molding part.
Background
For an injection molding part comprising a tubular structure, a specific mold, such as an inclined top mold, is adopted in the tubular structure during processing, so that when the whole injection molding part is withdrawn from the mold after processing, namely when the inclined top mold is removed, after the inclined top mold is withdrawn, a vacuum air cavity is easily formed between the bottom surface of the injection molding part and the external large mold due to the fact that the large mold outside the injection molding part is not evacuated, so that the internal and external atmospheric pressures are unbalanced, the injection molding part is easily deformed under the pressure difference, and the processing failure of a product is caused.
In order to solve the above problems, in the prior art, ventilation holes are generally formed in a mold, after the injection molding piece is shaped, the mold in the ventilation holes is firstly pulled away, so that the injection molding piece completes the air pressure balance, the injection molding piece is prevented from deforming or even being destroyed due to the unbalanced pressure in the process of exiting the mold, and meanwhile, the recovery efficiency of the mold is improved.
However, the above method still has a few problems, such as that when the mold is perforated, the integrity of the mold is damaged, and the injection molding part is molded under high pressure, so that the melted raw material of the injection molding part is likely to leak out of the vent holes under high pressure, and thus the material is missed and even the injection molding part cannot be molded.
Disclosure of Invention
The utility model aims to provide a vacuum breaking structure of an injection molding piece, which is used for balancing the atmospheric pressure inside and outside the injection molding piece when a mold is withdrawn and preventing the injection molding piece from deforming.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a broken vacuum structure of injection molding, injection molding includes tubular structure, tubular structure one end is sealed, and the other end is open, tubular structure confined one end still is equipped with the air vent.
The principle and the advantages of the scheme are as follows: during practical application, after the injection molding is finished and shaped, demolding is needed, namely the mold is evacuated from the injection molding, when the injection molding is obliquely ejected, as the sizing material and the oblique ejection are tightly attached, when the oblique ejection is slowly separated from the sizing material, a vacuum air cavity is formed inside the injection molding, namely between the injection molding and the outer mold, so that product demolding is not smooth, and meanwhile, deformation or damage is likely to occur to the injection molding due to unbalance of internal and external atmospheric pressure.
Compared with the prior art, the technical scheme has the advantages that the vacuum area can be prevented from being formed in the injection molding part, so that the product is deformed or damaged due to the unbalanced atmospheric pressure, the processing yield of the injection molding part product is greatly ensured, and the product quality is improved; on the other hand, after the inclined ejection die is separated, particularly after the die corresponding to the vent hole is evacuated, the inside air and the outside air of the injection molding are communicated, negative pressure is not generated, so that the die is difficult to separate from the injection molding, the inclined ejection die is also finished more smoothly to a great extent, the production efficiency of the injection molding is effectively improved, and the production cost of the injection molding is reduced.
Preferably, as an improvement, the tubular structure comprises a bottom plate, a first side plate, a substrate and a second side plate which are sequentially connected are arranged on the bottom plate, a top plate is further arranged above the bottom plate, and the first side plate, the substrate and the second side plate are all connected with the top plate.
Preferably, as a modification, the vent hole is located at an end of the base plate near the bottom plate.
Preferably, as a modification, the ventilation holes include at least two ventilation holes, one of which is located at the lower end of the base plate, and the other of which is located at the middle position or the upper end of the base plate.
Preferably, as a modification, the shape of the vent hole includes one or more of a circle and a polygon.
Preferably, as an improvement, the first side plate, the base plate and the second side plate are all provided with reinforcing ribs.
Preferably, as a modification, a through hole for communicating the inside and the outside of the injection molding member is provided in the top plate.
Preferably, as a modification, the first side plate, the base plate and the second side plate are all connected with the base plate in an inclined manner.
Preferably, as a modification, the first side plate, the base plate and the second side plate each have an inclination angle in the vertical direction of 0 to 30 degrees.
Preferably, as a modification, a space angle exists between the top plate and the bottom plate, and the space angle is 10-45 degrees.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a vacuum breaking structure of an injection molding member according to the present utility model.
Fig. 2 is a schematic back view of a first embodiment of a vacuum breaking structure for an injection molding member according to the present utility model.
Fig. 3 is a schematic view illustrating an inclination angle of an injection molding vacuum breaking structure according to an embodiment of the present utility model.
Fig. 4 is a schematic view illustrating a space angle of an embodiment of a vacuum breaking structure of an injection molding member according to the present utility model.
Fig. 5 is a schematic view illustrating the position of the vent hole in an embodiment of the vacuum breaking structure of an injection molding member according to the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
the labels in the drawings of this specification include: the bottom plate 1, the first side plate 2, the base plate 3, the second side plate 4, the top plate 5, the vent holes 6, the reinforcing ribs 7, the through holes 8, the inclination angle 9 and the space angle 10.
Embodiment one:
this embodiment is basically as shown in fig. 1 and fig. 2: the utility model provides an injection molding breaks vacuum structure, injection molding includes the tubular structure that one end was sealed one end open-ended, specifically, tubular structure includes bottom plate 1, install first curb plate 2, base plate 3 and second curb plate 4 that connect gradually on bottom plate 1, bottom plate 1 top still has roof 5, first curb plate 2, base plate 3 and second curb plate 4 all are connected with roof 5, open through-hole 8 on the roof 5 in the vertical direction, as shown in figure 4, this roof 5 is nonparallel with bottom plate 1, and the space angle 10 (namely the contained angle between roof and the horizontal plane) between the two is 10-45 degrees; the joints of the first side plate 2, the base plate 3, the second side plate 4 and the top plate 5 are provided with chamfers. The injection molding part in the scheme is actually applied to a part of the automobile interior trim panel.
On the other hand, as shown in fig. 3, the first side plate 2, the base plate 3 and the second side plate 4 are all connected with the bottom plate 1 in an inclined manner, wherein the inclination angles 9 of the first side plate, the base plate 3 and the second side plate 4 in the vertical direction are all 0-30 degrees, and specifically, 15 degrees are set in the embodiment.
On first curb plate and second curb plate 4, all install 2 strengthening ribs 7, also evenly spaced installs 3 strengthening ribs 7 on the base plate 3 to still open on the base plate 3 and be used for from the base plate 3 intercommunication injection molding inside and outside air vent 6, this air vent 6 sets up the one end that is close to bottom plate 1 at the base plate 3, and air vent 6 includes one at least, is provided with 2 in this embodiment, and 2 air vents 6 are located the interval between the strengthening ribs 7 on the base plate 3 respectively.
Specifically, in the present embodiment, the space angle 10 between the top plate 5 and the bottom plate 1 is set to 20 degrees.
The specific implementation process of this embodiment is as follows:
during the production and processing of the injection molding piece, the outer side of the injection molding piece is shaped through the outer die, the inner side of the injection molding piece is shaped through the inner die, namely the inclined top die, so that after the injection molding piece is shaped, the dies are sequentially withdrawn, the inclined top demolding can be preferentially carried out in consideration of the connection relation between the dies, namely the inner die is withdrawn firstly, a vacuum air cavity is formed between the injection molding piece and the outer die in the inclined top demolding process, at the moment, due to the fact that the vent holes 6 are formed in the base plate 3 of the injection molding piece, corresponding protrusions are arranged on the inner die, when the inner die is withdrawn a little by little, the protrusions are separated from the vent holes 6, air outside the injection molding piece is communicated together through the vent holes 6, the atmospheric pressure is balanced, the vacuum breaking effect is achieved, the die is more smooth to be withdrawn, and the injection molding piece is prevented from being deformed or damaged due to the fact that the atmospheric pressure is unbalanced due to the vacuum air cavity.
According to the scheme, the formation of the vacuum air cavity can be prevented when the injection molding die is demolded, so that deformation or damage of the injection molding due to the unbalance of the atmospheric pressure is avoided, the product quality of the injection molding is effectively ensured, and the yield of the injection molding is improved; and the vent holes 6 are arranged, so that the air circulation is larger, the die evacuation process is smoother, the demolding efficiency is improved, the production efficiency of products is further improved, and the production cost is reduced.
Example two
This embodiment is basically the same as embodiment one, except that:
as shown in fig. 5, two vent holes 6 on the base plate 3 are provided, one on the side close to the bottom plate 1 and the other on the side close to the top plate 5, by which the efficiency and effect of communication in the mold evacuation can be changed by changing the position difference between the vent holes 6, and the smooth air circulation due to the special abutting relationship when the vent holes 6 are all provided at the same height is avoided, thereby making the vacuum breaking effect bad.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present utility model, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (9)
1. Broken vacuum structure of injection molding, injection molding includes tubular structure, tubular structure one end is sealed, the other end opening, its characterized in that: the sealed end of tubular structure still is equipped with the air vent, tubular structure includes the bottom plate, be equipped with first curb plate, base plate and the second curb plate that connect gradually on the bottom plate, the bottom plate top still is equipped with the roof, just first curb plate, base plate and second curb plate all are connected with the roof.
2. An injection molding vacuum breaking structure according to claim 1, wherein: the vent hole is positioned at one end of the base plate, which is close to the bottom plate.
3. An injection molding vacuum breaking structure according to claim 1, wherein: the vent holes at least comprise two vent holes, one vent hole is positioned at the lower end of the base plate, and the other vent hole is positioned at the middle position or the upper end of the base plate.
4. An injection molding vacuum breaking structure according to claim 1, wherein: the shape of the vent includes one or more of circular and polygonal.
5. An injection molding vacuum breaking structure according to claim 1, wherein: reinforcing ribs are arranged on the first side plate, the base plate and the second side plate.
6. An injection molding vacuum breaking structure according to claim 1, wherein: and the top plate is provided with a through hole for communicating the inside and the outside of the injection molding piece.
7. An injection molding vacuum breaking structure according to claim 1, wherein: the first side plate, the base plate and the second side plate are all obliquely connected with the base plate.
8. The injection molding vacuum breaking structure according to claim 7, wherein: the inclination angles of the first side plate, the base plate and the second side plate in the vertical direction are all 0-30 degrees.
9. An injection molding vacuum breaking structure according to claim 1, wherein: and a space angle is formed between the top plate and the bottom plate, and the space angle is 10-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970188.3U CN220523856U (en) | 2023-07-26 | 2023-07-26 | Vacuum breaking structure of injection molding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970188.3U CN220523856U (en) | 2023-07-26 | 2023-07-26 | Vacuum breaking structure of injection molding part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220523856U true CN220523856U (en) | 2024-02-23 |
Family
ID=89937769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321970188.3U Active CN220523856U (en) | 2023-07-26 | 2023-07-26 | Vacuum breaking structure of injection molding part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220523856U (en) |
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2023
- 2023-07-26 CN CN202321970188.3U patent/CN220523856U/en active Active
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