CN211251199U - A evacuating device in mould for many caves thin wall plastic part injection mould - Google Patents
A evacuating device in mould for many caves thin wall plastic part injection mould Download PDFInfo
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- CN211251199U CN211251199U CN201920832427.6U CN201920832427U CN211251199U CN 211251199 U CN211251199 U CN 211251199U CN 201920832427 U CN201920832427 U CN 201920832427U CN 211251199 U CN211251199 U CN 211251199U
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Abstract
The utility model discloses an interior evacuating device of mould for many caves thin wall is moulded a piece injection mould, including last mould and lower mould, upward be equipped with the mold core on the mould, be equipped with down the mold core on the lower mould, go up mould and lower mould compound die back, go up the mold core and form the die cavity that is used for the forming workpiece with lower mold core, the die cavity still is connected with a gaseous suction device, and gaseous suction device is used for taking out the stranded gas of die cavity inside, still is equipped with the mouth of moulding plastics on going up the mould, and the mouth of moulding plastics is linked together with the. The gas suction device comprises an airflow channel arranged in the upper die and/or the lower die and an exhaust groove arranged on the part, corresponding to the parting surface, of the upper die and/or the lower die, the input end of the exhaust groove is communicated with the output end of the airflow channel, the output end of the exhaust groove is communicated with the die cavity, and the input end of the airflow channel is connected with a vacuum pumping device. By the air exhaust principle of the vacuum pump, air in the cavity is exhausted before injection molding of the mold, and the problems of air trapping and the like do not exist in the product during injection molding, so that the product is full in filling and good in surface smoothness.
Description
Technical Field
The utility model relates to an in-mould evacuating device for many caves thin wall plastic part injection mould belongs to mould injection technical field.
Background
In the injection molding process, certain gas is inevitably contained in a cavity after the mold is closed, and the gas can be wrapped in the cavity when the mold is quickly filled, so that gas trapping is caused, the molded injection molding piece has bad phenomena of scorching, air holes, material shortage, flash, flow marks and the like, and the appearance and the quality of the product are influenced. Meanwhile, the pressure in the cavity is rapidly increased due to gas compression, and the high pressure may cause the deformation of the die steel, so that the service life of the die is shortened.
To this problem of injection mold among the prior art, often adopt the mode of evacuation to handle, current injection mold evacuation system is mostly integral evacuation system, is about to whole mould wholly put into airtight container in, carries out the evacuation to airtight container to reach the purpose to the mould die cavity evacuation, these equipment structure are complicated relatively, and the cost is higher, has certain limitation.
If a vacuumizing device is designed in the mold design, before injection molding and filling, a mold cavity is vacuumized to achieve a certain vacuum degree, and the problem can be well solved.
Disclosure of Invention
The utility model aims at solving the above problems existing in the prior art and providing an in-mold vacuumizing device for a multi-cavity thin-wall plastic part injection mold.
The purpose of the utility model can be realized through the following technical scheme: the utility model provides an interior evacuating device of mould for many caves thin wall is moulded a plastic injection mould, includes mould and lower mould, upward be equipped with the mold core on the mould, be equipped with down the mold core on the lower mould, go up mould and lower mould compound die back, go up the mold core and form the die cavity that is used for the shaping work piece with lower mold core, the die cavity still is connected with a gaseous suction device, gaseous suction device is used for taking out the stranded gas of die cavity inside, upward still be equipped with the mouth of moulding plastics on the mould, it is linked together with the die cavity to mould plastics the mouth.
Preferably, the gas suction device comprises an airflow channel arranged in the upper die and/or the lower die and an exhaust groove arranged on the part, corresponding to the parting surface, of the upper die and/or the lower die, the input end of the exhaust groove is communicated with the output end of the airflow channel, the output end of the exhaust groove is communicated with the die cavity, and the input end of the airflow channel is connected with a vacuumizing device.
Preferably, the vacuumizing device comprises a vacuumizing connector, one end of the vacuumizing connector is connected with the airflow channel, and the other end of the vacuumizing connector is connected with the vacuum pump through an air pipe.
Preferably, the exhaust groove is integrally formed at a position of the upper mold corresponding to the parting surface.
Preferably, the depth of the exhaust groove is 0.01-0.02 mm.
Preferably, the gas flow channel is integrally formed in the rear mold.
Preferably, a sealing groove is formed in the outer portion of the cavity, and a sealing ring is arranged in the sealing groove.
Preferably, the output ends of the cavity and the exhaust groove are also provided with a gas filter.
Preferably, the vacuum-pumping joint is fixedly connected with the airflow channel in a screwing, clamping or embedding manner.
The utility model discloses technical scheme's advantage mainly embodies: the vacuum-pumping device in the mould can effectively improve the surface quality of the plastic part, can also improve the forming process conditions, greatly reduces the production cost, shortens the production period of the plastic part and greatly improves the production efficiency.
The mold is vacuumized by utilizing the gap of the vent hole channel of the cavity, the influence on the flow speed of injection molding filler caused by overlarge internal resistance of the cavity in the injection molding process is avoided, thin-wall plastic parts with uniform thickness can be injected, the quality of the whole injection molding thin-wall plastic part is ensured, and the mold is suitable for industrial popularization and use.
Drawings
Fig. 1 is a schematic structural view of an in-mold air exhaust path for a multi-cavity thin-wall plastic part injection mold of the present invention.
Fig. 2 is an enlarged structure diagram of the sealing groove of the in-mold air exhaust gas path channel for the multi-cavity thin-wall plastic part injection mold of the utility model.
Fig. 3 is an enlarged structural schematic diagram of a sealing ring of an in-mold evacuating device for a multi-cavity thin-wall plastic part injection mold of the present invention.
Fig. 4 is a top view of the in-mold evacuating device for multi-cavity thin-wall plastic part injection mold of the present invention.
Fig. 5 is a top view of the sealing ring enlargement portion of the in-mold evacuating device for the multi-cavity thin-wall plastic part injection mold of the present invention.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a preferred embodiment of the present invention. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings, and in particular, rigidity corresponds to a dimension from top to bottom, width corresponds to a dimension from left to right, and depth corresponds to a dimension from front to rear, which relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning connections, links, and the like, refer to a relationship wherein structures are directly or indirectly attached or attached to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
The utility model discloses an interior evacuating device of mould for many caves thin wall is moulded a piece injection mould, as shown in figure 1, figure 2, figure 3, figure 4 and figure 5, an interior evacuating device of mould for many caves thin wall is moulded a piece injection mould, including last mould and lower mould, upward be equipped with the mold core on the mould, be equipped with down the mold core on the lower mould, go up mould and lower mould compound die back, go up the mold core and form the die cavity that is used for the forming workpiece with lower mold core, the die cavity still is connected with a gaseous suction device, gaseous suction device is used for taking out the inside stranded gas of die cavity, upward still be equipped with the mouth of moulding plastics on the mould, the mouth of moulding plastics is linked together with the die cavity, and external melting sizing material gets into the die cavity through this.
As shown in fig. 1, the gas suction device includes a gas flow passage 10 provided in the upper mold and/or the lower mold, and a gas discharge groove 20 provided in a portion of the upper mold and/or the lower mold corresponding to the parting surface, the gas flow passage being integrally formed in the rear mold. The input end of the exhaust groove is communicated with the output end of the airflow channel, the output end of the exhaust groove is communicated with the cavity, and the input end of the airflow channel is connected with a vacuumizing device 30.
As shown in fig. 1, the vacuum device 30 includes a vacuum connector 31, one end of the vacuum connector is connected to the air flow channel, and the other end of the vacuum connector is connected to a vacuum pump through an air pipe 32. By the air exhaust principle of the vacuum pump, air in the cavity is exhausted before injection molding of the mold, and the problems of air trapping and the like do not exist in the product during injection molding, so that the product is full in filling and good in surface smoothness.
The vacuumizing connector is fixedly connected with the airflow channel in a screwing, clamping or embedding mode. In this embodiment, the vacuum pumping connector and the air flow channel are preferably fixedly connected in a clamping manner, which is convenient for operation and maintenance.
The exhaust groove is integrally formed at the position of the upper die corresponding to the parting surface. The depth of the exhaust groove is 0.01-0.02 mm. The depth of the exhaust groove is mainly determined by the overflow values of different raw materials, the depth of the exhaust groove is within the overflow values, glue leakage is avoided, and air can flow.
The outside of the cavity is provided with a sealing groove, and a sealing ring 40 is arranged in the sealing groove, so that the sealing performance of the cavity and an exhaust hole channel is ensured, the vacuum degree of the cavity is improved, the phenomenon of air leakage in the cavity is avoided, and a better vacuumizing effect is ensured. The sealing ring has long service life, can ensure the use state and the service life of the die, ensure the quality of products produced by the die, and reduce the cost for maintaining the sealing ring.
And the output ends of the cavity and the exhaust groove are also provided with a gas filter. The gas filter is arranged to filter out impurities and prolong the service life of the die.
After the die is closed, the vacuumizing device can quickly pump air in the die cavity of the die, so that the injection pressure is reduced by about 40%, and a plastic part is easier to mold.
The in-mold vacuumizing device can effectively improve the surface quality of a plastic part, can improve the molding process conditions, greatly reduces the production cost, shortens the production period of the plastic part, greatly improves the production efficiency, improves the density and the surface precision of a mold product, solves the problems of poor exhaust, poor mold filling and the like in the injection molding process of the mold, and improves the product quality.
The mold is vacuumized by utilizing the gap of the vent hole channel of the cavity, the influence on the flow speed of injection molding filler caused by overlarge internal resistance of the cavity in the injection molding process is avoided, thin-wall plastic parts with uniform thickness can be injected, the quality of the whole injection molding thin-wall plastic part is ensured, and the mold is suitable for industrial popularization and use.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides an interior evacuating device of mould that is used for many caves thin wall to mould a plastic injection mould which characterized in that:
the injection molding device comprises an upper die and a lower die, wherein an upper die core is arranged on the upper die, a lower die core is arranged on the lower die, after the upper die and the lower die are closed, the upper die core and the lower die core form a cavity for molding a workpiece, the cavity is further connected with a gas suction device, the gas suction device is used for pumping out trapped gas inside the cavity, an injection molding opening is further formed in the upper die, and the injection molding opening is communicated with the cavity.
2. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 1, further comprising: the gas suction device comprises an airflow channel (10) arranged in an upper die and/or a lower die and an exhaust groove (20) arranged on the portion, corresponding to the parting surface, of the upper die and/or the lower die, wherein the input end of the exhaust groove is communicated with the output end of the airflow channel, the output end of the exhaust groove is communicated with the cavity, and the input end of the airflow channel is connected with a vacuumizing device (30).
3. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 2, further comprising: the vacuumizing device (30) comprises a vacuumizing connector (31), one end of the vacuumizing connector is connected with the airflow channel, and the other end of the vacuumizing connector is connected with a vacuum pump through an air pipe (32).
4. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 2, further comprising: the exhaust groove is integrally formed at the position of the upper die corresponding to the parting surface.
5. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 2, further comprising: the depth of the exhaust groove is 0.01-0.02 mm.
6. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 2, further comprising: the gas flow channel is integrally formed in the rear mold.
7. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 2, further comprising: and a sealing groove is arranged outside the cavity, and a sealing ring (40) is arranged in the sealing groove.
8. The in-mold vacuum extractor for injection molds of multi-cavity thin-walled plastic parts according to claim 1, further comprising: and the output ends of the cavity and the exhaust groove are also provided with a gas filter.
9. An in-mold vacuum extractor for an injection mold of a multi-cavity thin-walled plastic part according to claim 3, wherein: the vacuumizing connector is fixedly connected with the airflow channel in a screwing, clamping or embedding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832427.6U CN211251199U (en) | 2019-06-04 | 2019-06-04 | A evacuating device in mould for many caves thin wall plastic part injection mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920832427.6U CN211251199U (en) | 2019-06-04 | 2019-06-04 | A evacuating device in mould for many caves thin wall plastic part injection mould |
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| CN211251199U true CN211251199U (en) | 2020-08-14 |
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| CN201920832427.6U Active CN211251199U (en) | 2019-06-04 | 2019-06-04 | A evacuating device in mould for many caves thin wall plastic part injection mould |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112776278A (en) * | 2021-03-18 | 2021-05-11 | 安徽工业大学 | Vacuumizing sealing device and vacuum injection mold |
| CN113771305A (en) * | 2021-09-24 | 2021-12-10 | 广东柳道热流道系统有限公司 | Gas-assisted runner structure, hot runner system and injection molding method |
-
2019
- 2019-06-04 CN CN201920832427.6U patent/CN211251199U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112776278A (en) * | 2021-03-18 | 2021-05-11 | 安徽工业大学 | Vacuumizing sealing device and vacuum injection mold |
| CN113771305A (en) * | 2021-09-24 | 2021-12-10 | 广东柳道热流道系统有限公司 | Gas-assisted runner structure, hot runner system and injection molding method |
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