CN213055819U - Negative pressure injection mold - Google Patents
Negative pressure injection mold Download PDFInfo
- Publication number
- CN213055819U CN213055819U CN202021111443.5U CN202021111443U CN213055819U CN 213055819 U CN213055819 U CN 213055819U CN 202021111443 U CN202021111443 U CN 202021111443U CN 213055819 U CN213055819 U CN 213055819U
- Authority
- CN
- China
- Prior art keywords
- mold core
- cavity
- lower mold
- groove
- upper mold
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a negative pressure injection mold, it includes mold core and lower mold core, upward be provided with a plurality of die cavity on mold core and the lower mold core, upward be provided with the intercommunication on the mold core the injecting glue mouth of die cavity, upward be provided with between mold core and the lower mold core and be used for sealing the sealing washer of die cavity, upward be provided with a plurality of intercommunication on mold core and/or the lower mold core the aspirating hole of die cavity, the aspirating hole all communicates evacuating device. The utility model discloses a negative pressure injection mold is through the evacuation to air escape in with the die cavity before moulding plastics, thereby avoided the air to form the condition of gas pocket on the product surface, thereby also avoid using the condition that the exhaust hole formed the cull, practiced thrift technology, the cost is reduced.
Description
Technical Field
The utility model belongs to the field of machinery, especially, relate to injection mold.
Background
Injection molding is a method for producing and molding industrial products. The products are generally produced by rubber injection molding and plastic injection molding. Thermoplastic plastics or thermosetting materials are poured into a cavity of a mould, so that plastic products with various shapes are manufactured by utilizing a forming mould. During the injection molding process, it is usually necessary to take care to exhaust the gas in the cavity, otherwise, the gas can leave pores on the surface of the plastic product, thereby affecting the beauty and quality of the product. At present, a common method is to arrange a plurality of exhaust holes for exhausting in a mold, and the exhaust holes can leave residual glue on the surface of a plastic product, so that a removing process needs to be added, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides a negative pressure injection mold with simple process, convenient use and good product quality.
The technical scheme of the utility model a negative pressure injection mold is provided, it includes mold core and lower mold core, upward be provided with a plurality of die cavity on mold core and the lower mold core, upward be provided with the intercommunication on the mold core the injecting glue mouth of die cavity, its characterized in that: and a sealing ring for sealing the cavity is arranged between the upper mold core and the lower mold core, a plurality of air exhaust holes communicated with the cavity are formed in the upper mold core and/or the lower mold core, and the air exhaust holes are communicated with a vacuumizing device.
Preferably, the upper mold core is provided with a plurality of air grooves communicated with the cavity, the two opposite side walls of the upper mold core are provided with the air exhaust holes, and the air exhaust holes penetrate through the upper mold core to be communicated with the air grooves.
Preferably, the air grooves are formed around the die cavities and among the die cavities, the air grooves are communicated with the die cavities through a plurality of thin clearance channels, and the depth of each thin clearance channel is smaller than 1 mm.
Preferably, a sealing groove surrounding the cavity for a circle is formed in the lower mold core, and an o-shaped sealing ring protruding out of the sealing groove is arranged in the sealing groove.
Preferably, the upper mold core is provided with a sealing groove surrounding the cavity for a circle, and an o-shaped sealing ring protruding out of the sealing groove is arranged in the sealing groove.
Preferably, the sealing ring is made of high temperature resistant rubber.
Preferably, the upper mold core is provided with an exhaust groove surrounding the cavity for a circle, the exhaust hole is communicated with the exhaust groove, and the exhaust groove is positioned on the inner side of the sealing groove in the closed state of the upper mold core and the lower mold core.
Preferably, four corners of the lower mold core are respectively provided with a guide post, and the position of the upper mold core corresponding to the guide post is provided with a guide hole.
The utility model discloses a negative pressure injection mold is through the evacuation to air escape in with the die cavity before moulding plastics, thereby avoided the air to form the condition of gas pocket on the product surface, thereby also avoid using the condition that the exhaust hole formed the cull, practiced thrift technology, the cost is reduced.
Drawings
FIG. 1 is a schematic structural view of an upper core;
FIG. 2 is a schematic structural view of a lower mold core;
FIG. 3 is a partially broken away schematic view of the upper core;
FIG. 4 is a schematic structural view of the upper and lower mold cores prior to closure;
fig. 5 is a schematic structural view after the upper mold core and the lower mold core are closed.
Detailed Description
The following describes in further detail embodiments of the present invention.
As shown in fig. 1 to 5, the utility model discloses a negative pressure injection mold includes mold core 10 and lower mold core 12, goes up mold core 10 and is provided with a plurality of die cavity 14 down on the mold core 12, goes up the injecting glue mouth 16 that is provided with intercommunication die cavity 14 on the mold core 10, goes up mold core 10 or lower mold core 12 and still can be provided with mould benevolence 17, this is conventional injection mold's structure, the utility model discloses do not restrict that die cavity 14 specifically sets up on last mold core 10 still on lower mold core 12, or all set up. Four corners of the lower mold core 12 are respectively provided with a guide post 18, and the position of the upper mold core 10 corresponding to the guide post 18 is provided with a guide hole 20 for guiding when the upper mold core 10 and the lower mold core 12 are closed.
The lower mold core 12 is provided with a sealing groove 22 surrounding the cavity 14, and an o-shaped sealing ring (not shown) protruding from the sealing groove 22 is arranged in the sealing groove 22 and is made of high-temperature-resistant rubber. Of course, the sealing groove 22 may also be provided on the upper core 10 (illustration of this embodiment is not provided). The upper mold core 10 is provided with an exhaust groove 26 surrounding the cavity 14, in this embodiment, the sealing groove 22 and the exhaust groove 26 are rectangular, and the length of the side of the exhaust groove 26 is smaller than that of the sealing groove 22, so that when the upper mold core 10 and the lower mold core 12 are closed, the exhaust groove 26 is located inside the sealing groove 22, and is sealed. The upper mold core 10 is provided with air exhaust holes 28 on two opposite side walls, the air exhaust holes 28 are all communicated with a vacuum device (not shown), and the air exhaust holes 28 penetrate through the upper mold core 10 to be communicated with the air exhaust grooves 26.
Furthermore, a plurality of air grooves 30 communicated with the cavity 14 are arranged on the upper mold core 10, the air grooves 30 are arranged around the cavity 14 and between the cavities 14, and especially, the air is easy to remain at the position after the upper mold core 10 and the lower mold core 12 are closed. The air groove 30 is communicated with the cavity 14 through a plurality of thin clearance channels 32, the depth of the thin clearance channels 32 is less than 1mm, and the air channel less than 1mm is formed after the upper mold core 10 and the lower mold core 12 are closed. That is, a shallow groove is formed in the front of the gas groove 30 to communicate with the cavity 14, and the shallow groove is a thin gap channel 32.
The utility model discloses at the during operation, go up mould core 10 and lower mould core 12 closed gradually, closed in-process, go up mould core 10 and lower mould core 12 interval 10 mm's time, evacuating device begins work promptly, through the air in the outside discharge die cavity 14 of aspirating hole 28. After the mold is closed, a sealing structure is formed through a sealing ring, the cavity 14 is sealed, and then injection molding is started; in the process, the vacuumizing device continuously vacuumizes, so that the cavity 14 is gradually in a vacuum state, and air holes are avoided. The depth of the thin clearance channel 32 is less than 1mm, and the vent groove 26 can still be communicated to the inside of the cavity 14 after the upper and lower cores 10 and 12 are closed, so that air can be vented through the thin clearance channel 32, while the injected liquid plastic or the like cannot pass through the thin clearance channel 32 due to surface tension. By the mode, air holes can be avoided without using vent holes, and the generation of residual glue is effectively avoided, so that the product quality is greatly improved, the production process is simplified, and the production cost is reduced.
The above embodiment is only one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a negative pressure injection mold, its includes mold core and lower mold core, upward be provided with a plurality of die cavity on mold core and the lower mold core, upward be provided with the intercommunication on the mold core the injecting glue mouth of die cavity, its characterized in that: a sealing ring for sealing the cavity is arranged between the upper mold core and the lower mold core, a plurality of air exhaust holes communicated with the cavity are formed in the upper mold core and/or the lower mold core, and the air exhaust holes are communicated with a vacuumizing device; the upper mold core is provided with a plurality of air grooves communicated with the cavity, the two opposite side walls of the upper mold core are provided with the air suction holes, and the air suction holes penetrate through the upper mold core to be communicated with the air grooves;
the gas groove is arranged at the position where gas is easy to remain after the upper mold core and the lower mold core are closed, the gas groove is communicated with the mold cavity through a plurality of thin clearance channels, and the depth of each thin clearance channel is smaller than 1 mm.
2. The negative-pressure injection mold according to claim 1, characterized in that: the lower mold core is provided with a sealing groove surrounding the cavity for one circle, and an o-shaped sealing ring protruding out of the sealing groove is arranged in the sealing groove.
3. The negative-pressure injection mold according to claim 1, characterized in that: the upper mold core is provided with a sealing groove surrounding the cavity for one circle, and an o-shaped sealing ring protruding out of the sealing groove is arranged in the sealing groove.
4. The negative pressure injection mold according to one of claims 2 or 3, characterized in that: the sealing ring is made of high-temperature-resistant rubber.
5. The negative pressure injection mold of claim 2, wherein: the upper mold core is provided with an exhaust groove surrounding the cavity for a circle, the exhaust hole is communicated with the exhaust groove, and the exhaust groove is positioned on the inner side of the sealing groove when the upper mold core and the lower mold core are in a closed state.
6. The negative-pressure injection mold according to claim 1, characterized in that: four corners of the lower mold core are respectively provided with a guide post, and the position of the upper mold core corresponding to the guide post is provided with a guide hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021111443.5U CN213055819U (en) | 2020-06-16 | 2020-06-16 | Negative pressure injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021111443.5U CN213055819U (en) | 2020-06-16 | 2020-06-16 | Negative pressure injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213055819U true CN213055819U (en) | 2021-04-27 |
Family
ID=75567171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021111443.5U Active CN213055819U (en) | 2020-06-16 | 2020-06-16 | Negative pressure injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213055819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115139462A (en) * | 2022-05-26 | 2022-10-04 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
-
2020
- 2020-06-16 CN CN202021111443.5U patent/CN213055819U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115139462A (en) * | 2022-05-26 | 2022-10-04 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
| CN115139462B (en) * | 2022-05-26 | 2023-12-15 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213055819U (en) | Negative pressure injection mold | |
| CN2920620Y (en) | Epoxy mould capable of reducing electronic epoxy product air holes and air bubbles | |
| CN108360304B (en) | Pulp molding product and local thickening process method | |
| CN107297856B (en) | Injection molding method of soft rubber arch product | |
| CN216760644U (en) | High-temperature mold with injection molding exhaust needle | |
| CN213006334U (en) | Vacuumizing injection mold | |
| CN213137657U (en) | Injection mold structure with flash runner | |
| CN113005822A (en) | Integral forming die and forming method for paper bottle body | |
| CN211221612U (en) | Die cavity air extractor | |
| CN207432691U (en) | One kind vacuumizes injection mold | |
| CN207594237U (en) | Vacuum low-pressure injection molding system | |
| CN213891080U (en) | Mould vacuum pumping system | |
| CN107364110B (en) | A kind of PU plastics sucking moulding method | |
| CN212920222U (en) | Plastic mold exhaust assembly | |
| CN209504793U (en) | A kind of mold with vacuum evacuation device | |
| CN111775416A (en) | Exhaust structure of mould | |
| CN205997285U (en) | A kind of die venting structure | |
| CN203510651U (en) | Vacuum exhaust type injection mould for copy machine shell | |
| CN205929334U (en) | Inhale vacuum -exhaust structure | |
| CN216267308U (en) | Plastic cup injection mold with improved pneumatic ejection device | |
| CN218576885U (en) | Vacuumizing injection mold | |
| CN211993992U (en) | Forming die is used in production of bottle mouth | |
| CN216544414U (en) | Anti-vacuum pneumatic auxiliary ejection type injection mold | |
| CN207983910U (en) | A kind of structure that thermoplastic mold injection molding vacuumizes | |
| CN217021307U (en) | Thin-wall plastic product mold exhaust structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |