CN218576885U

CN218576885U - Vacuumizing injection mold

Info

Publication number: CN218576885U
Application number: CN202223164583.0U
Authority: CN
Inventors: 吴锋
Original assignee: Newsight Tool And Mold Dgn Co ltd
Current assignee: Newsight Tool And Mold Dgn Co ltd
Priority date: 2022-11-26
Filing date: 2022-11-26
Publication date: 2023-03-07
Anticipated expiration: 2032-11-26

Abstract

The utility model discloses a vacuumizing injection mold, which relates to the technical field of injection molds, and comprises an upper mold and a lower mold which are mutually butted, wherein an upper mold core is fixedly arranged on the upper mold, a lower mold core is fixedly arranged on the lower mold, the upper mold core and the lower mold core are mutually covered to form a mold cavity for forming a product, a lower fixed plate and a bottom plate structure are sequentially connected below the lower mold, the periphery of the bottom plate structure is closed, a vacuumizing channel is arranged in the lower fixed plate, a first channel communicated with the lower mold is arranged in the lower mold, and the first channel is communicated with the vacuumizing channel; a second channel penetrating through the upper die is formed in the upper die and communicated with the first channel; the lower die core and the upper die core form a first parting surface, a second parting surface and a die cavity parting surface, wherein the first parting surface, the second parting surface and the die cavity parting surface are respectively provided with an exhaust groove, the lower die core is in clearance fit with the lower die, the upper die core is in clearance fit with the upper die, and the vacuumizing channel is communicated with the exhaust grooves along the clearance; the vacuum pumping of the whole mould can be realized.

Description

Vacuumizing injection mold

Technical Field

The utility model relates to an injection mold technical field specifically is an evacuation injection mold.

Background

The mould is used for obtaining various moulds and tools of required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. In short, a mold is a tool used to make a shaped article, the tool being made up of various parts, different molds being made up of different parts. The surface of an article is processed mainly by changing the physical state of a formed material, and the article is called as an industrial mother. An injection mold is a tool for producing plastic products, and generally comprises an upper mold and a lower mold, wherein the upper mold and the lower mold are closed to form a runner system and a mold cavity of the plastic products during injection molding. During injection molding, the mold is clamped on an injection molding machine, molten plastic is injected into the mold cavity and is cooled and molded in the mold cavity, meanwhile, the molten plastic is cooled into runner system condensate in the runner system, the upper mold and the lower mold are separated after the plastic product is molded, the plastic product is ejected out of the mold cavity through the ejection system and leaves the mold, finally, the upper mold and the lower mold are closed again for next injection molding, and the whole injection molding process is carried out circularly.

In the injection molding process, due to the existence of air in the mold cavity, when the molten plastic is injected at high speed and high pressure, the air in the mold cavity cannot be exhausted at a time, and the residual air can be mixed with the molten plastic and left in the product, so that various quality abnormalities of the plastic product can be caused, such as poor air exhaust, poor filling, obvious welding line, scorching, unstable size and the like. The existing solution is to open an air outlet on the parting surface of the mold to exhaust air, but the effect on some molds with complex mold cavities is not ideal, and especially when the mold has a plurality of parting surfaces, how to exhaust residual air is very important.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

A vacuumizing injection mold comprises an upper mold and a lower mold which are butted with each other, wherein an upper mold core is fixedly arranged on the upper mold, a lower mold core is fixedly arranged on the lower mold, and the upper mold core and the lower mold core are mutually covered to form a mold cavity for forming a product;

a lower fixing plate and a bottom plate structure are sequentially connected below the lower die, the periphery of the bottom plate structure is closed, a lower ejection mechanism is arranged on the bottom plate structure, the lower ejection mechanism sequentially penetrates through the lower fixing plate and the lower die and then is in butt joint fit with the die cavity, a vacuumizing channel is arranged in the lower fixing plate, a connector communicated with the vacuumizing channel is arranged on one side of the lower fixing plate, a first channel communicated with the lower die is formed in the lower die, and the first channel is communicated with the vacuumizing channel;

an upper fixing plate and a glue inlet system are sequentially connected above the upper die, an upper ejection mechanism is arranged on the upper fixing plate, the upper ejection mechanism sequentially penetrates through the upper fixing plate and the upper die and then is in butt joint fit with the die cavity, a second channel penetrating through the upper die is formed in the upper die, and the second channel is communicated with the first channel;

the lower mould benevolence is including the benevolence under the merciful and peaceful second of first lower mould, the merciful and peaceful second of first lower mould docks and forms first die parting surface, go up the merciful and peaceful second of the first mould and dock each other and form the die cavity die parting surface, wherein, first die parting surface, second die parting surface and die cavity parting surface all are equipped with the air discharge duct, the merciful and peaceful second of first lower mould benevolence all with lower mould clearance fit, the merciful and peaceful mould clearance fit of first last mould benevolence and second, evacuation passageway communicates with the air discharge duct along the clearance.

As a further aspect of the utility model: the lower fixing plate is internally provided with a first cavity matched with the lower ejection mechanism, the first cavity is communicated with the vacuumizing channel, a first gap communicated with the first cavity is formed between the lower die and the lower die core, the first gap is communicated with the first channel and the exhaust groove, the upper fixing plate is internally provided with a second cavity matched with the upper ejection mechanism, a second gap communicated with the second cavity is formed between the upper die and the upper die core, and the second gap is communicated with the first gap, the second channel and the exhaust groove until the vacuumizing channel, the first cavity, the first gap, the first channel, the second gap, the second cavity and the exhaust groove are mutually communicated to form an air pumping circuit.

As a further aspect of the present invention: the lower die is provided with a first yielding part corresponding to the first channel, and the first gap is communicated with the first channel through the first yielding part; the upper die is provided with a second yielding part corresponding to the second channel, and the second gap is communicated with the second channel through the second yielding part.

As a further aspect of the present invention: and a first sealing rubber strip surrounding the lower die core is arranged on the parting surface of the lower die.

As a further aspect of the utility model: the bottom plate structure comprises a bottom plate positioned below the lower fixing plate, mold feet which are symmetrically arranged and a cover plate used for covering the side parts of the mold feet are arranged between the bottom plate and the lower fixing plate.

As a further aspect of the present invention: and a second sealing rubber strip is arranged on the inner side of the cover plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model, through the arrangement of the air exhaust channel, further vacuumizes the whole mould, improves the filling effect of the product, eliminates the influence of air pressure on the forming, thereby effectively eliminating the phenomena of product defects, scorching, bubbles and the like and fundamentally solving the bad phenomena; and the mould is easily filled under the vacuum condition, reduces injection pressure and injection molding machine backpressure, accelerates the speed of moulding plastics, and then reduces the shaping cycle, improves production efficiency, saves time cost, improves product weld line, promotes the goods quality.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic cross-sectional view of a viewing angle of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

fig. 4 is a schematic cross-sectional view of another perspective of the present invention;

FIG. 5 is an enlarged schematic view of the structure at B in FIG. 4;

fig. 6 is a schematic cross-sectional view of another view of the present invention;

FIG. 7 is an enlarged schematic view of the structure at C in FIG. 6;

FIG. 8 is a schematic structural view of the present invention, with the upper mold, the upper fixing plate, the glue inlet system and the cover plate removed;

fig. 9 is a schematic structural view of an upper mold insert and a lower mold insert of the present invention.

The reference numerals and names in the figures are as follows:

1. an upper die; 2. a lower die; 3. an upper die core; 4. a lower die core; 5. a lower fixing plate; 6. a floor structure; 7. a lower ejection mechanism; 8. a vacuum channel is pumped; 9. a connector; 10. a first channel; 11. an upper fixing plate; 12. a glue feeding system; 13. an upper ejection mechanism; 14. a second channel; 15. a first lower mold core; 16. a second lower mold core; 17. a first parting surface; 18. a first upper mold core; 19. a second upper mold core; 20. a second parting plane; 21. parting surface of the die cavity; 22. a first chamber; 23. a first gap; 24. a second chamber; 25. a second gap; 26. a first carry portion; 27. a second carry portion; 28. a first joint strip; 29. a base plate; 30. a mould leg; 31. a cover plate; 32. a second joint strip; 33. an exhaust groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-9, in an embodiment of the present invention, a vacuumized injection mold includes an upper mold 1 and a lower mold 2 butted with each other, an upper mold core 3 is fixedly installed on the upper mold 1, a lower mold core 4 is fixedly installed on the lower mold 2, and the upper mold core 3 and the lower mold core 4 are mutually covered to form a mold cavity for molding a product;

a lower fixing plate 5 and a bottom plate structure 6 are sequentially connected below the lower die 2, the periphery of the bottom plate structure 6 is sealed, a lower ejection mechanism 7 is arranged on the bottom plate structure 6, the lower ejection mechanism 7 sequentially penetrates through the lower fixing plate 5 and the lower die 2 and then is in butt joint fit with a die cavity, a vacuumizing channel 8 is arranged in the lower fixing plate 5, a connector 9 communicated with the vacuumizing channel 8 is arranged on one side of the lower fixing plate 5, a first channel 10 communicated with the lower die 2 is arranged in the lower die 2, and the first channel 10 is communicated with the vacuumizing channel 8;

an upper fixing plate 11 and a glue inlet system 12 are sequentially connected above the upper die 1, an upper ejection mechanism 13 is arranged on the upper fixing plate 11, the upper ejection mechanism 13 sequentially penetrates through the upper fixing plate 11 and the upper die 1 and then is in butt joint fit with the die cavity, a second channel 14 penetrating through the upper die 1 is formed in the upper die 1, and the second channel 14 is communicated with the first channel 10;

the lower mold core 4 comprises a first lower mold core 15 and a second lower mold core 16, the first lower mold core 15 and the second lower mold core 16 are mutually butted to form a first parting surface 17, the upper mold core 3 comprises a first upper mold core 18 and a second upper mold core 19, the first upper mold core 18 and the second upper mold core 19 are mutually butted to form a second parting surface 20, the second lower mold core 16 and the second upper mold core 19 are mutually butted to form a mold cavity parting surface 21, wherein the first parting surface 17, the second parting surface 20 and the mold cavity parting surface 21 are respectively provided with an exhaust groove 33, the first lower mold core 15 and the second lower mold core 16 are respectively in clearance fit with the lower mold 2, the first upper mold core 18 and the second upper mold core 19 are respectively in clearance fit with the upper mold 1, and the vacuumizing channel 8 is communicated with the exhaust groove 33 along the clearance.

In the utility model, through the setting of evacuation passageway 8, the one end of evacuation passageway 8 comes to be connected with external evacuation equipment through connector 9, the other end of evacuation passageway 8 is along the clearance that lower mould 2 and lower mould benevolence 4 formed wholly and the clearance that upper mould 1 and upper mould benevolence 3 formed wholly, come to communicate with exhaust groove 33 on first parting surface 17, second parting surface 20 and the die cavity parting surface 21, concretely exhaust groove 33 on first parting surface 17, second parting surface 20 and die cavity parting surface 21 all communicates with the die cavity in respective parting surface, the clearance that lower mould 2 and lower mould benevolence 4 formed wholly can communicate in the clearance that upper mould 1 and upper mould benevolence 3 formed wholly, make after the compound die, take out first parting surface 17, second parting surface 20 and remaining air of die cavity parting surface 21 through evacuation passageway 8, and then make whole die core accomplish to be in the environment of vacuum;

on the basis, an upper ejection mechanism 13 and a lower ejection mechanism 7 are further introduced, the upper ejection mechanism 13 can be used for preventing a product from being stuck to the upper die 1 when the die is opened, the lower ejection mechanism 7 can be used for ejecting and demolding the product in the lower die 2 and combining the arrangement of the base structure with closed periphery, when the die is closed, the product is communicated with the outside only through a pouring gate on the glue inlet system 12, so that the interior of the die is in a closed environment, residual air in the lower fixing plate 5 and the bottom plate structure 6 is extracted through the vacuum-pumping channel 8, and the residual air in the upper fixing plate 11 and the glue inlet system 12 is extracted through the arrangement of the first channel 10 and the second channel 14 along the first channel 10 and the second channel 14 by the vacuum-pumping channel 8, so that the interior of the die, the exterior of the upper die core 3 and the exterior of the lower die core 4 are also in a vacuum environment;

The embodiment of the utility model provides an in, be equipped with in the bottom plate 5 and match in the first cavity 22 of lower ejection mechanism 7, first cavity 22 and evacuation passageway 8 intercommunication, form the first clearance 23 that communicates in first cavity 22 between lower mould 2 and the lower mould benevolence 4, and first clearance 23 all communicates with first passageway 10 and exhaust duct 33 again, be equipped with in the top plate 11 and match in the second cavity 24 of last ejection mechanism 13, it forms the second clearance 25 that communicates in second cavity 24 to go up to form between mould 1 and the last mould benevolence 3, second clearance 25 all communicates with first clearance 23 again, second passageway 14 and exhaust duct 33, to making evacuation passageway 8, first cavity 22, first clearance 23, first passageway 10, second passageway 14, second clearance 25, second cavity 24 and exhaust duct 33 communicate each other and form the pumping circuit.

In the above technical means, the vacuum-pumping channel 8 can further pump out residual air in the lower fixing plate 5 and the bottom plate structure 6 along the first cavity 22, the first channel 10 and the second channel 14 can be in a vertical corresponding relationship to achieve a communicating purpose, the vacuum-pumping channel 8 can form a vacuum-pumping route along the first cavity 22, the first gap 23, the first channel 10, the second channel 14, the second gap 25 and the second cavity 24 to further achieve a purpose of pumping out residual air in the upper fixing plate 11 and the glue-feeding system 12, further, the first gap 23 and the second gap 25 can also be in a vertical corresponding relationship to achieve a communicating purpose, the vacuum-pumping channel 8 can form a vacuum-pumping route along the first cavity 22, the first gap 23, the exhaust groove 33 of the first parting surface 17, the exhaust groove 33 of the mold cavity, the exhaust groove 33 of the second parting surface 25 and the exhaust groove 33 of the second parting surface 20 to further achieve a purpose of pumping out residual air in the first parting surface 17, the second parting surface 20 and the mold cavity surface 21, and the two vacuum-pumping routes are communicated, thereby effectively improving the efficiency of the mold.

In the embodiment of the present invention, the lower mold 2 is provided with a first relief portion 26 corresponding to the first channel 10, and the first gap 23 is communicated with the first channel 10 through the first relief portion 26; the upper die 1 is provided with a second relief portion 27 corresponding to the second passage 14, and the second gap 25 communicates with the second passage 14 via the second relief portion 27. By providing the first position-avoiding portion 26 and the second position-avoiding portion 27, the first position-avoiding portion 26 and the second position-avoiding portion 27 may have a lead angle, which facilitates the flow of gas.

In the embodiment of the present invention, the parting surface of the lower mold 2 is provided with a first sealing rubber strip 28 surrounding the lower mold core 4. Through first joint strip 28's setting, effectively improve the leakproofness after mould 1 and lower mould 2 compound dies, prevent that outside air from entering into in the mould, and then reach better airtight environment.

In the embodiment of the present invention, the bottom plate structure 6 includes a bottom plate 29 located below the bottom plate 5, and a mold leg 30 symmetrically disposed and a cover plate 31 for covering the side portion of the mold leg 30 are disposed between the bottom plate 29 and the bottom plate 5.

In the embodiment of the present invention, the inner side of the cover plate 31 is provided with a second sealing rubber strip 32. Through the setting of first joint strip 28, effectively improve floor structure 6's leakproofness, prevent that outside air from entering into in the mould, and then reach better airtight environment.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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.

Claims

1. A vacuum-pumping injection mold comprises an upper mold and a lower mold which are mutually butted, wherein an upper mold core is fixedly arranged on the upper mold, a lower mold core is fixedly arranged on the lower mold, and the upper mold core and the lower mold core are mutually covered to form a mold cavity for molding a product,

the lower mould benevolence is including merciful and peaceful second lower mould benevolence of first lower mould, the merciful and peaceful second lower mould benevolence of first lower mould docks each other and forms first parting surface, go up the mould benevolence including first mould benevolence and second and go up mould benevolence, the merciful and peaceful second of first last mould benevolence docks each other and forms the die cavity parting surface, wherein, first parting surface, second parting surface and die cavity parting surface all are equipped with the air discharge duct, merciful and peaceful second lower mould benevolence of first lower mould all with lower mould clearance fit, merciful and peaceful second of first last mould benevolence all with last mould clearance fit, the evacuation passageway communicates along clearance and air discharge duct.

2. The injection mold according to claim 1, wherein the lower fixing plate has a first cavity therein for accommodating the lower ejector mechanism, the first cavity is communicated with the evacuation channel, a first gap is formed between the lower mold and the lower mold core and communicated with the first cavity, the first gap is communicated with the first channel and the exhaust groove, a second cavity is provided in the upper fixing plate and is communicated with the upper ejector mechanism, a second gap is formed between the upper mold and the upper mold core and communicated with the second cavity, and the second gap is communicated with the first gap, the second channel and the exhaust groove, such that the evacuation channel, the first cavity, the first gap, the first channel, the second gap, the second cavity and the exhaust groove are communicated with each other to form an exhaust line.

3. The evacuated injection mold according to claim 2, wherein the lower mold is provided with a first relief portion corresponding to the first passage, and the first gap is communicated with the first passage through the first relief portion; the upper die is provided with a second yielding part corresponding to the second channel, and the second gap is communicated with the second channel through the second yielding part.

4. The mold according to claim 1 or 3, wherein the lower mold has a first sealing strip around the lower core on the parting surface.

5. An injection mould according to claim 1 or 3 characterised in that the base plate structure comprises a base plate located below the bottom plate, and symmetrically arranged mould feet and cover plates for covering the side parts of the mould feet are arranged between the base plate and the bottom plate.

6. An evacuated injection mould according to claim 5, characterized in that the inner side of the cover plate is provided with a second sealing bead.