CN213006334U

CN213006334U - Vacuumizing injection mold

Info

Publication number: CN213006334U
Application number: CN202021688859.3U
Authority: CN
Inventors: 赵仙鹤; 王云; 陶扬
Original assignee: Zhejiang Hongyuan New Materials Technology Co ltd
Current assignee: Zhejiang Hongyuan New Materials Technology Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-04-20
Anticipated expiration: 2030-08-13

Abstract

The utility model belongs to the technical field of moulds, in particular to a vacuum-pumping injection mould; a mold foot which is closed at the periphery and is communicated up and down is arranged between the lower mold and the lower fixing plate, the ejector plate is arranged on the lower fixing plate and is positioned in the mold foot, the upper mold comprises an upper mold frame and an upper mold core assembly, the lower mold comprises a lower mold frame and a lower mold core assembly, the upper mold core assembly and the lower mold core assembly form a mold cavity when the mold is closed, sealing rings are arranged between the upper mold core assembly and the lower mold core assembly, between the lower mold and the mold foot, and between the mold foot and the lower fixing plate, a vacuum pumping cavity is arranged in the lower mold frame below the lower mold core assembly, the lower end of the ejector pin is; the utility model discloses go up the mold core behind the compound die and form inclosed die cavity with lower mold core, carry out the evacuation to the die cavity under the drive of outside air exhaust equipment, can solve among the prior art because of the die cavity has the air and lead to the technical problem that the product is yellowish, improved the performance and the outward appearance of product.

Description

Vacuumizing injection mold

The technical field is as follows:

the utility model belongs to the technical field of the mould, refer in particular to an evacuation injection mold.

Background art:

in injection molding certain products, injection molds are commonly used. An injection mold generally comprises an upper mold and a lower mold, wherein mold cores in the upper mold and the lower mold cooperate to obtain a cavity of a product, and molten plastic is injected into the cavity from a gate for filling. After the mould is closed, go up the mold core formation inclosed die cavity in mould and the lower mould, only communicate with each other with the external world through the runner, remain the air in the die cavity, when the molten plastics was penetrated from the runner, the runner was filled by plastics, and the air in the die cavity can't be escaped, produces certain influence to the filling effect of die cavity, if: when the injection mold is used for processing certain white products, the product is yellowed due to air reserved in the cavity, and the performance and the appearance of the product are seriously influenced.

The invention content is as follows:

the utility model aims at providing a can take out the air in the die cavity, improve and produce the evacuation injection mold of product performance.

The utility model discloses a realize like this:

an injection mold with vacuum pumping comprises an upper fixing plate, an upper mold, a lower mold, an ejector plate, an ejector pin and a lower fixing plate, a mold foot with closed periphery and communicated up and down is arranged between the lower mold and the lower fixed plate, the ejector plate is arranged on the lower fixed plate and positioned in the mold foot, the upper die comprises an upper die frame and an upper die core assembly arranged in the upper die frame, the lower die comprises a lower die frame and a lower die core assembly arranged in the lower die frame, the upper die core assembly and the lower die core assembly form a die cavity when the dies are assembled, sealing rings are arranged between the upper die core assembly and the lower die core assembly, between the lower die and the die leg and between the die leg and the lower fixing plate, be provided with the evacuation chamber in the lower mould frame of lower die core subassembly below, the lower extreme setting of thimble passes the evacuation chamber on the thimble board, the upper end and stretches into in the lower die core subassembly, the evacuation chamber passes through exhaust tube and external intercommunication.

In foretell evacuation injection mold, be provided with cavity down in the framed, lower module includes from supreme bottom plate, apron, lower mould core, the lower mould core of setting gradually in lower cavity down, be provided with on the bottom plate and be recessed, it forms evacuation chamber with the bottom surface of apron to be recessed.

In the above vacuum-pumping injection mold, the concave recess is provided with a plurality of bumps at intervals.

In the above vacuum-pumping injection mold, the air pumping pipeline is located on the bottom plate, and the lower mold frame is provided with a vacuum-pumping nozzle communicated with the air pumping pipeline.

In the vacuum-pumping injection mold, the vacuum-pumping nozzle is connected with a vacuum-pumping device.

In the vacuum-pumping injection mold, the lower mold core plate and the lower mold core, the lower mold core plate and the cover plate, the cover plate and the bottom plate, and the bottom plate and the bottom surface of the lower concave cavity of the lower mold frame are sealed by the sealing rings.

In the above-mentioned vacuum injection mold, be provided with the cavity in going up the framed, go up the mold core subassembly including setting up the last mold core board in last cavity, be provided with the mold core on the bottom surface of last mold core board.

In the above vacuum-pumping injection mold, a seal ring is arranged between the upper mold core plate and the upper mold core.

In the vacuum-pumping injection mold, the sealing ring is arranged between the bottom surface of the upper mold core plate and the upper plane of the lower mold core.

In the vacuumizing injection mold, the middle of the lower fixing plate is provided with a through hole, the ejector plate is arranged on the lower fixing plate through a cushion block, the cushion block blocks the through hole, and the cushion block and the lower fixing plate are sealed through a sealing ring.

Compared with the prior art, the utility model outstanding advantage is:

1. the upper mold core and the lower mold core form an airtight cavity after the mold is closed, and the cavity is vacuumized under the driving of external air pumping equipment, so that the technical problem that the product is yellowed due to air in the prior art can be solved, and the performance and the appearance of the product are improved;

2. the utility model discloses set up the sealing washer between each adapting unit in the up-down direction, utilize the thimble hole of former thimble system to concentrate the air of a few a plurality of product die cavities to the evacuation chamber in, simplified the evacuation structure of mould.

3. The utility model discloses when the evacuation state, be in negative pressure state in the die cavity, can carry out the low-speed injection, guarantee the economic nature of technology.

Description of the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 2;

FIG. 6 is an enlarged partial schematic view of FIG. 5;

fig. 7 is a front perspective view of the bottom plate of the present invention;

fig. 8 is a bottom perspective view of the bottom plate of the present invention;

fig. 9 is a schematic view of a cover plate of the present invention;

fig. 10 is a schematic view of a lower die core of the present invention;

fig. 11 is a front perspective view of the lower die core plate of the present invention;

fig. 12 is a bottom perspective view of the lower die core plate of the present invention;

fig. 13 is a schematic view of a mold foot of the present invention;

fig. 14 is a schematic view of the lower fixing plate of the present invention.

In the figure: 1. an upper fixing plate; 2. an upper die; 3. a lower die; 4. an ejector plate; 5. a thimble; 6. a lower fixing plate; 7. a mould leg; 8. putting a mold frame; 9. a lower mold frame; 10. an evacuation chamber; 11. an air extraction pipeline; 12. a base plate; 13. a cover plate; 14. a lower die core plate; 15. a lower mold core; 16. sinking; 17. a bump; 18. a vacuumizing nozzle; 19. a first groove; 20. a second groove; 21. a third groove; 22. a fourth groove; 23. an upper die core plate; 24. an upper mold core; 25. a fifth groove; 26. a through hole; 27. cushion blocks; 28. and a sixth groove.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 14:

a vacuumizing injection mold comprises an upper fixing plate 1, an upper mold 2, a lower mold 3, an ejector pin plate 4, an ejector pin 5 and a lower fixing plate 6, wherein a mold foot 7 which is closed at the periphery and is communicated up and down is arranged between the lower mold 3 and the lower fixing plate 6, the ejector pin plate 4 is arranged on the lower fixing plate 6 and is positioned in the mold foot 7, the upper mold 2 comprises an upper mold frame 8 and an upper mold core assembly arranged in the upper mold frame 8, the lower mold 3 comprises a lower mold frame 9 and a lower mold core assembly arranged in the lower mold frame 9, the upper mold core assembly and the lower mold core assembly form a cavity when the mold is closed, sealing rings are arranged between the upper mold core assembly and the lower mold core assembly, between the lower mold 2 and the mold foot 7, between the mold foot 7 and the lower fixing plate 6, a vacuumizing cavity 10 is arranged in the lower mold frame 9 below the lower mold core assembly, the lower end of the ejector pin 5 is arranged, the evacuation chamber 10 communicates with the outside through an evacuation line 11. And the outer end of the air pumping pipeline 11 is provided with a vacuum pumping device.

The utility model discloses a set up the sealing washer between each spare part that exists the clearance, set the mould foot 7 to seal all around, the structure that link up from top to bottom, in the centre hole of recycling former thimble system combines evacuation equipment to concentrate the air of a few a plurality of product die cavities to evacuation chamber 10, takes out the air in the die cavity, has simplified the evacuation structure, can solve among the prior art because of the air lead to the technical problem that the product is yellowish, has improved the quality of product and the pleasing to the eye degree of outward appearance.

Further, be provided with cavity down in the lower die frame 9, lower mould component includes bottom plate 12, apron 13, lower mould core board 14, the lower mould core 15 that sets gradually in lower cavity from supreme down, be provided with recessed 16 on the bottom plate 12, recessed 16 forms evacuation chamber 10 with the bottom surface of apron 13.

As shown in fig. 7, a plurality of projections 17 are spaced in the recess 16. The bumps 17 are provided to reduce the volume of the evacuation chamber 10 and improve the evacuation efficiency.

As shown in fig. 3, the suction pipeline 11 is located on the bottom plate 12, and the lower mold frame 9 is provided with a vacuum nozzle 18 communicated with the suction pipeline 11 for facilitating connection with a vacuum-pumping device.

As shown in fig. 3-6 and 11, a sealing ring is disposed between the lower mold core plate 14 and the lower mold core 15, specifically, a first groove 19 is disposed on an outer ring of an upper surface of the lower mold core plate 14, the sealing ring is disposed in the first groove 19, and when the lower mold core 15 is pressed on the lower mold core plate 14, the sealing ring is extruded and deformed under the action of its gravity to achieve a sealing effect. As shown in fig. 3-6 and 12, a sealing ring is disposed between the lower die core plate 14 and the cover plate 13, specifically, a second groove 20 is disposed on an outer ring of a bottom surface of the lower die core plate 14, and when the lower die core plate 14 is pressed on the cover plate 13, the sealing ring is extruded and deformed under the action of gravity thereof to achieve a sealing effect. As shown in fig. 3-6, 7 and 9, a sealing ring is disposed between the cover plate 13 and the bottom plate 12, specifically, a third groove 21 is disposed on an outer ring of an upper plane of the bottom plate 12, and when the cover plate 13 is pressed on the bottom plate 12, the sealing ring is squeezed and deformed under the action of gravity to achieve a sealing effect. As shown in fig. 3-6 and fig. 8, the bottom plate 12 is sealed with the bottom surface of the concave cavity of the lower mold frame 9 by a sealing ring, specifically, a fourth groove 22 is provided on the outer ring of the bottom surface of the bottom plate 12, and when the bottom plate 12 is pressed on the bottom surface of the lower concave cavity, the sealing ring is pressed and deformed under the action of its gravity to achieve the sealing effect.

As shown in fig. 3, 5 and 6, an upper cavity is provided in the upper mold frame 8, the upper mold core assembly includes an upper mold core plate 23 disposed in the upper cavity, and an upper mold core 24 is disposed on a bottom surface of the upper mold core plate 23. And a sealing ring is arranged between the upper die core plate 23 and the upper die core 24.

In order to realize the sealing between the upper die core assembly and the lower die core assembly, a sealing ring is arranged between the bottom surface of the upper die core plate 23 and the upper plane of the lower die core 15. Specifically, as shown in fig. 10, a fifth groove 25 is formed in the upper surface of the lower mold core 15, and when the upper mold core plate 23 is pressed on the lower mold core 15, the sealing ring is extruded and deformed under the action of gravity to achieve a sealing effect.

As shown in fig. 3 and 4, a through hole 26 is formed in the middle of the lower fixing plate 6, the ejector plate 4 is disposed on the lower fixing plate 6 through a spacer 27, the spacer 27 blocks the through hole 26, and the spacer 27 and the lower fixing plate 6 are sealed by a sealing ring. As shown in fig. 14, the utility model discloses be provided with sixth recess 26 outside through-hole 26, the sealing washer sets up in sixth recess 26, and when cushion 27 pressed and establishes bottom plate 6, under the effect of its gravity, reached sealed effect with sealing washer extrusion deformation.

As shown in fig. 13, the bottom surface of the mold foot 7 of the present invention is provided with a seventh groove, the sealing ring is disposed in the seventh groove, and when the mold foot 7 is pressed on the lower fixing plate 6, the sealing ring is extruded and deformed to achieve the sealing effect under the action of gravity.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an evacuation injection mold, includes an upper fixed plate (1), goes up mould (2), lower mould (3), thimble board (4), thimble (5), bottom plate (6), its characterized in that: the mold comprises a lower mold (3), a lower fixing plate (6), an ejector plate (4), an upper mold core assembly and a lower mold core assembly, wherein the lower mold core assembly is arranged in the upper mold frame (8), the lower mold core assembly is arranged in the lower mold frame (9), the upper mold core assembly and the lower mold core assembly form a mold cavity when in mold closing, a sealing ring is arranged between the upper mold core assembly and the lower mold core assembly, between the lower mold (3) and the mold pin (7), between the mold pin (7) and the lower fixing plate (6), a drawing cavity (10) is arranged in the lower mold frame (9) below the lower mold core assembly, the lower end of an ejector pin is arranged on the ejector plate (4), the upper end of the ejector pin penetrates through the drawing cavity (10) and extends into the lower mold core assembly, the vacuum pumping chamber (10) is communicated with the outside through a pumping pipeline (11).

2. The evacuated injection mold according to claim 1, characterized in that: be provided with cavity down in lower die frame (9), lower mould (3) subassembly includes from supreme bottom plate (12), apron (13), lower mould core (14), lower mold core (15) of setting gradually in lower cavity down, be provided with on bottom plate (12) and sink (16), the bottom surface of sinking (16) and apron (13) forms evacuation chamber (10).

3. The evacuated injection mold according to claim 2, characterized in that: a plurality of convex blocks (17) are arranged in the concave recess (16) at intervals.

4. The evacuated injection mold according to claim 2, characterized in that: the air suction pipeline (11) is positioned on the bottom plate (12), and a vacuum pumping nozzle (18) communicated with the air suction pipeline (11) is arranged on the lower die frame (9).

5. The evacuated injection mold according to claim 4, characterized in that: the vacuum-pumping nozzle (18) is connected with a vacuum-pumping device.

6. The evacuated injection mold according to claim 2, characterized in that: and sealing rings are arranged between the lower die core plate (14) and the lower die core (15), between the lower die core plate (14) and the cover plate (13), between the cover plate (13) and the bottom plate (12), and between the bottom plate (12) and the bottom surface of the concave cavity of the lower die frame (9).

7. The evacuated injection mold according to claim 2, characterized in that: the upper die core assembly is characterized in that an upper concave cavity is formed in the upper die frame (8), the upper die core assembly comprises an upper die core plate (23) arranged in the upper concave cavity, and an upper die core (24) is arranged on the bottom surface of the upper die core plate (23).

8. The evacuated injection mold according to claim 7, characterized in that: and a sealing ring is arranged between the upper die core plate (23) and the upper die core (24).

9. The evacuated injection mold according to claim 7, characterized in that: and a sealing ring is arranged between the bottom surface of the upper die core plate (23) and the upper plane of the lower die core (15).

10. The evacuated injection mold according to claim 1, characterized in that: the middle part of bottom plate (6) is provided with through-hole (26), the bottom surface of thimble board (4) is provided with cushion (27), cushion (27) shutoff through-hole (26), it is sealed through the sealing washer between cushion (27) and bottom plate (6).