CN215511876U

CN215511876U - Vacuum auxiliary forming device

Info

Publication number: CN215511876U
Application number: CN202122162225.5U
Authority: CN
Inventors: 夏朝南; 刘卫
Original assignee: Kunshan Moyisi Precision Electronic Technology Co ltd
Current assignee: Kunshan Moyisi Precision Electronic Technology Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-01-14
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a vacuum auxiliary forming device, which is applied to the interior of a mould, and comprises: the sealing ring pressing plate, the exhaust hole, the exhaust groove, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring; the sealing ring pressing plates are arranged on two sides of the lower fixing plate and the B plate of the mold, and the exhaust holes are connected with the exhaust grooves; the exhaust duct is arranged on the parting surface of the mold core of the rear mold and distributed around the molding part of the product. Through the many sealing washer that sets up in the mould, make the die cavity region can with external isolated open, the air does not flow, has set up exhaust hole and air discharge duct simultaneously, the product of being convenient for air around derives, and during moulding plastics, the outer air exhaust device of mould starts, takes away the air in the die cavity, forms vacuum state, can accelerate the flow of plastic like this, also takes away the bubble in the plastic, makes product inner wall center bubble-free, and weld mark department intensity is better.

Description

Vacuum auxiliary forming device

Technical Field

The utility model relates to the field of mold processing, in particular to a vacuum auxiliary forming device.

Background

In recent years, with the development of plastic industry, the application range of plastic products is expanding, and the proportion of plastic products is also increasing rapidly. The plastic mould is a combined mould for plastic extruding, injection, compression moulding, blow moulding and low-foaming moulding, and mainly includes upper mould and lower mould. However, after the injection mold in the prior art is closed, a large amount of air remains between the upper mold and the lower mold, and particularly when a product which is thick in glue position, uneven in wall thickness and difficult to fill is produced, bubbles are easily generated at the position where the glue position is thick, the strength of the product is affected, and defective products are generated.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the vacuum auxiliary forming device is arranged in a mold, vacuum can be formed in the mold through an external air exhaust device, the pressure of a feed inlet can be effectively relieved, and bubbles can not be generated in an injection molding workpiece.

Specifically, the utility model discloses a vacuum auxiliary forming device, which is applied to the interior of a mold, and comprises: the sealing ring pressing plate, the exhaust hole, the exhaust groove, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring; the sealing ring pressing plates are arranged on two sides of the lower fixing plate and the B plate of the mold, and the exhaust holes are connected with the exhaust grooves; the exhaust grooves are arranged on the parting surface of the mold core of the rear mold of the mold and distributed around the molding position of a product; the first sealing ring surrounds the upper surface of the B plate of the mold, the second sealing ring surrounds the feed inlet of the mold, the third sealing ring is arranged in the sealing ring pressing plate, and the fourth sealing ring is arranged around the ejector rod hole.

The utility model has the beneficial effects that: through the many sealing washer that sets up in the mould, make the die cavity region can with external isolated open, the air does not flow, has set up exhaust hole and air discharge duct simultaneously, the product of being convenient for air around derives, and during moulding plastics, the outer air exhaust device of mould starts, takes away the air in the die cavity, forms vacuum state, can accelerate the flow of plastic like this, also takes away the bubble in the plastic, makes product inner wall center bubble-free, and weld mark department intensity is better.

Further, the exhaust hole is arranged in the front model cavity, and the exhaust groove is aligned below the exhaust hole.

Furthermore, the upper end of the exhaust hole penetrates through the plate A of the mold and is externally connected with an air exhaust device.

Furthermore, the upper surface and the lower surface of the section of the sealing ring are arc-shaped, and the left side and the right side of the section of the sealing ring are provided with bulges.

Furthermore, the upper surface and the lower surface of the three sections of the sealing ring are planes, and a compression part is arranged in the middle of the sealing ring.

Furthermore, the upper layer and the lower layer of the sealing ring are arranged around the ejector rod hole.

Furthermore, the exhaust groove is provided with a branch exhaust groove, and the branch exhaust groove is connected with the product forming part and the exhaust groove.

A mold includes: the vacuum auxiliary forming device comprises an upper fixing plate, a plate A, a front mold cavity, a plate B, a rear mold core, a support and a lower fixing plate.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below.

FIG. 1 is a view showing a structure of a mold equipped with a vacuum auxiliary molding apparatus of the present invention

FIG. 2 is a view of a rear mold core structure

FIG. 3 is a partial enlarged view of the post-mold core structure

FIG. 4 is a cross-sectional view of the seal ring

FIG. 5 is a three-sectional view of a seal ring

Wherein the reference numbers referred to in the figures are as follows: a seal ring pressing plate 1; an exhaust hole 2; an exhaust groove 3; a branch exhaust duct 4; a first sealing ring 5; a second sealing ring 6; a third sealing ring 7; a fourth seal ring 8; an upper fixing plate 9; an A plate 10; a front mold cavity 11; a B plate 12; a rear mold core 13; a support column 14; and a lower fixing plate 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the present invention discloses a vacuum-assisted molding apparatus applied inside a mold, the vacuum-assisted molding apparatus comprising: the sealing ring comprises a sealing ring pressing plate 1, an exhaust hole 2, an exhaust groove 3, a first sealing ring 5, a second sealing ring 6, a third sealing ring 7 and a fourth sealing ring 8; the sealing ring pressing plate 1 is arranged on two sides of a lower fixing plate 15 and a B plate 12 of the mold, and the exhaust hole 2 is connected with the exhaust groove 3; the exhaust grooves 3 are arranged on the parting surface of the mold core 13 of the rear mold and distributed around the product forming position; a first sealing ring 5 is arranged around the upper surface of a B plate 12 of the mold, a second sealing ring 6 is arranged around a feed inlet of the mold, a third sealing ring 7 is arranged in a pressing plate 1 of the sealing ring, and a fourth sealing ring 8 is arranged around a top rod hole.

The utility model has the beneficial effects that: through the many sealing washer that sets up in the mould, make the die cavity region can with external isolated open, the air does not flow, has set up exhaust hole 2 and exhaust duct 3 simultaneously, the product of being convenient for air around derives, and during moulding plastics, the outer air exhaust device of mould starts, takes away the air in the die cavity, forms vacuum state, can accelerate the flow of plastic like this, also takes away the bubble in the plastic, makes product inner wall center bubble-free, and weld mark department intensity is better.

In some embodiments, the exhaust hole 2 may adopt a structure scheme that the exhaust hole 2 is arranged in the front mold cavity 11, and the lower part of the exhaust hole 2 is aligned with the exhaust groove 3. The upper end of the exhaust hole 2 penetrates through the mould A plate 10 and is externally connected with an air extractor. The exhaust hole 2 transmits air in the exhaust groove 3 to the upper surface of the front mold cavity 11, the upper end of the exhaust hole 2 penetrates through the mold A plate 10, and a connecting port is arranged on the outer side surface of the mold A plate 10 and connected with an air extraction device to extract air so as to ensure the vacuum state in the mold.

In some embodiments, the first sealing ring 5 may have a structure in which the upper and lower surfaces of the first sealing ring 5 are circular arcs, and the left and right sides of the first sealing ring are provided with protrusions. Two arc surfaces about 5 of sealing washer are closely laminated with the recess on A board 10 and the B board 12, and the arch that both sides set up is receiving the extrusion back to both sides deformation, plugs up the gap between A board 10 and B board 12, prevents the air admission, ensures that the mould can't get into in outside air behind the mould that closes.

In some embodiments, the second sealing ring 6 can adopt the following structural scheme, the second sealing ring 6 is arranged around the feed inlet of the die, the cross section can be a circular cross section, and the second sealing ring 6 has the advantages of preventing air from entering from the feed inlet, avoiding the problem that the raw materials contain air bubbles due to uneven feeding caused by high pressure, and avoiding the poor injection molding part. In addition, the requirement on the air compressor can be reduced by reducing the pressure at the feed inlet, so that the production cost and the production limitation are reduced.

In some embodiments, the third sealing ring 7 may adopt a structure scheme that an upper surface and a lower surface of a cross section of the third sealing ring 7 are flat surfaces, and a compression part is arranged in the middle of the cross section. The sealing pressing plate 1 is provided with an annular groove and is arranged on two sides of a fixing plate and a B plate 12, the upper plane and the lower plane are arranged to be capable of being attached to the surface of the fixing plate and the B plate 12 and the bottom of the annular groove after installation, meanwhile, the width of a compression part is smaller than the width of two ends, the middle of the compression part is compressed after installation to generate elasticity, greater attaching force is provided for the upper surface and the lower surface, an inner support column 14 and an ejector pin area of the mold are surrounded, air circulation is prevented, the vacuum environment in the mold cavity is further ensured, and the quality and the consistency of products are improved.

In some embodiments, the four sealing rings 8 can adopt the following structural scheme, and the upper layer and the lower layer of the four sealing rings 8 are arranged around the ejector rod hole. The sealing ring IV 8 has the advantage of preventing air from entering the mold from a gap on the side surface of the ejector rod hole below the lower fixing plate 15 to influence the vacuum environment in the mold.

In some embodiments, the exhaust groove 3 may adopt a structure scheme that the exhaust groove 3 surrounds the product forming position for a circle, a branched exhaust groove 4 is formed along the diameter direction of the circle to communicate the product forming position with the exhaust groove 3, so as to lead out the gas at the product forming position, and meanwhile, because the size of the exhaust groove 3 is small, the product forming is not affected while the air is led out.

When the vacuum sealing device is used, the sealing ring pressing plate 1, the exhaust hole 2, the exhaust groove 3 and the exhaust pipe 4 are assembled in a mold, vacuumizing operation is performed firstly, the sealing ring and the sealing ring pressing plate 1 prevent outside air from entering, the exhaust groove 3 guides air at the product forming position into the exhaust hole 2, the exhaust hole 2 is externally connected with a vacuumizing device to pump out air in the exhaust hole 2, then plastic begins to be injected, vacuumizing is stopped before mold opening is completed after injection, the interior of the mold is kept to be vacuum before mold opening, flowing of the plastic can be accelerated, bubbles in the plastic are pumped away, no bubbles exist in the center of the inner wall of the product, and the strength of a welding mark is better.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. A vacuum assisted molding apparatus for use inside a mold, the vacuum assisted molding apparatus comprising: the sealing ring device comprises a sealing ring pressing plate (1), an exhaust hole (2), an exhaust groove (3), a first sealing ring (5), a second sealing ring (6), a third sealing ring (7) and a fourth sealing ring (8); the sealing ring pressing plate (1) is arranged on two sides of a lower die fixing plate (15) and a B plate (12), and the exhaust hole (2) is connected with the exhaust groove (3); the exhaust grooves (3) are arranged on the parting surface of the mold core (13) of the rear mold and distributed around the product forming position; seal ring one (5) encircles mould B board (12) upper surface setting, seal ring two (6) encircle the mould feed inlet setting, seal ring three (7) set up in seal ring clamp plate (1), seal ring four (8) set up around the ejector pin hole.

2. Vacuum assisted moulding device according to claim 1, characterized in that the venting holes (2) are arranged in the front mould cavity, the venting holes (2) being aligned with the venting grooves (3) below.

3. The vacuum assisted forming device according to claim 1, characterized in that the upper end of the exhaust hole (2) passes through the A plate of the mold and is externally connected with an air suction device.

4. The vacuum assisted forming device according to claim 1, wherein the upper and lower surfaces of the cross section of the first sealing ring (5) are circular arc-shaped, and the left and right sides are provided with protrusions.

5. The vacuum assisted forming device of claim 1, wherein the upper surface and the lower surface of the section of the sealing ring III (7) are planes, and a compression part is arranged in the middle.

6. The vacuum assisted forming apparatus of claim 1, wherein the four (8) seal rings are disposed in double layers around the ejector pin hole.

7. Vacuum assisted moulding device according to claim 1, characterized in that the venting groove (3) is provided with a branching venting groove (4), the branching venting groove (4) connecting the product moulding site with the venting groove (3).

8. A mold, comprising: an upper fixing plate (9), an A plate (10), a front mold cavity (11), a B plate (12), a rear mold core (13), a support column (14), a lower fixing plate (15), and further comprising the vacuum-assisted molding apparatus of any one of claims 1 to 7.