CN214773763U

CN214773763U - Injection mold front mold double ejection mechanism

Info

Publication number: CN214773763U
Application number: CN202120511723.3U
Authority: CN
Inventors: 梁正华; 王华良; 郑炳国
Original assignee: Taizhou Kaihua Automobile Mould Co ltd
Current assignee: Taizhou Kaihua Automobile Mould Co ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-11-19
Anticipated expiration: 2031-03-11

Abstract

The utility model relates to a front mould double ejection mechanism of an injection mould, which comprises a front mould and a rear mould, wherein the front mould comprises an upper compound plate, a hot runner plate, square iron, a cavity and a front mould ejector plate; the back mould includes lower compound board, mould foot, core, lower thimble, its characterized in that: be equipped with two liftout mechanisms on the preceding mould thimble board, two liftout mechanisms include straight liftout mechanism and push out mechanism to one side, and straight liftout mechanism includes upper end and preceding mould thimble board fixed connection's straight ejector pin, and the lower extreme of straight ejector pin can vertically run through the die cavity, the lower extreme of straight ejector pin is equipped with the pressure head, oblique liftout mechanism include the oblique ejector pin that upper end and preceding mould thimble board are connected, the other end of oblique ejector pin can run through downwards to one side the die cavity, the lower extreme of oblique ejector pin is equipped with to one side and pushes up the back-off. The utility model discloses not only can reduce the impaired risk when injection moulding spare and mould die sinking, but also can simplify the mould structure, reduce mould manufacturing cost.

Description

Injection mold front mold double ejection mechanism

Technical Field

The utility model belongs to the injection mold field relates to an injection mold, especially two ejection mechanism of injection mold front mould.

Background

Most of plastic products are formed by injection molding, and some plastic product parts are complicated in structure and deep in front mold rib positions of an injection mold for product forming, so that the injection molded parts are easy to clamp on the front mold during demolding, such as a glove box, and therefore the injection molded parts cannot be directly ejected during mold opening. The traditional demoulding device is manufactured by opening the front mould to block the front mould, opening the mould to enable the cavity base plate and the cavity to be separated by a certain distance under the action of the draw hook and the cavity built-in spring, and then enabling a product to be separated from the reverse buckle, so that ejection and part taking of the product are completed. The structure of the demolding device has the following disadvantages:

1. the risk exists in die opening of the cavity, and if a spring arranged in the cavity is clamped, the injection molding part in the cavity is directly pulled to damage and the die is damaged;

2. if the product is firmly clamped with the cavity after injection molding, a straight top or an ejector pin needs to be installed on the base plate, so that the mold mechanism is complicated, ejection of the injection molded part is not only avoided, and the manufacturing cost is increased.

Disclosure of Invention

The to-be-solved technical problem of the utility model is not enough to prior art, provides a two ejection mechanisms of injection mold front mould, and damaged risk when this two ejection mechanisms of injection mold front mould not only can reduce injection moulding spare and mould die sinking can also simplify the mould structure moreover, reduces mould manufacturing cost.

The to-be-solved technical problem of the utility model is realized through following technical scheme. The utility model relates to a front mould double ejection mechanism of an injection mould, which comprises a front mould and a rear mould, wherein the front mould comprises an upper compound plate, a hot runner plate arranged below the upper compound plate, square iron arranged below the hot runner plate, a cavity arranged below the square iron and a front mould ejector plate arranged between the hot runner plate and the cavity; the back mould includes lower multiple sheet, establishes the mould foot on lower multiple sheet, establishes the core on the mould foot, vertically runs through the lower thimble of core, its improvement point lies in:

the front mold ejector plate is provided with a double-ejection mechanism, the double-ejection mechanism comprises a straight ejection mechanism and an inclined ejection mechanism, the straight ejection mechanism comprises a straight ejector rod fixedly connected with the front mold ejector plate, the lower end of the straight ejector rod can vertically run through the cavity, the lower end of the straight ejector rod is provided with an ejector head used for ejecting an injection molded part, the inclined ejection mechanism comprises an upper end and an inclined ejector rod connected with the front mold ejector plate, the other end of the inclined ejector rod can run through the cavity obliquely and downwards, and the lower end of the inclined ejector rod is provided with an inclined ejection reversing buckle used for being fastened with an internal structure of the injection molded part.

The technical scheme of the utility model among, in order to control the stroke of front mould thimble board to the ejector pin head of the straight ejector pin of control that can be more accurate and the oblique top back-off of oblique ejector pin stabilize injection moulding spare, further preferred technical scheme is: the one side that is located straight ejection mechanism at preceding mould thimble board lower surface is equipped with the stroke stopper of preceding mould thimble board, when the stroke stopper with the die cavity upper surface contact, the ejector head contacts with the injection moulding piece in the die cavity, pushes up back-off and injection moulding piece lock joint to one side simultaneously.

The technical scheme of the utility model among, in order to can demold more conveniently to avoid causing adverse effect to the injection moulding spare in the die cavity when the drawing of patterns as far as possible, further preferred technical scheme is: and a stroke limiting block of the front die ejector plate is arranged on one side of the lower surface of the front die ejector plate, which is positioned on the straight ejection mechanism, and when the die is opened, the die opening action of the front die is completed when the stroke limiting block is in contact with the upper surface of the cavity.

The technical scheme of the utility model among, in order to make preceding mould ejector plate keep motionless in the die sinking process to make straight ejector pin and oblique ejector pin fix injection moulding spare, avoid causing adverse effect to the injection moulding spare in the die cavity when the drawing of patterns, further preferred technical scheme is: still set up drawing of patterns drag hook device, drawing of patterns drag hook device includes die cavity drag hook that stiff end and hot runner board side are connected and the core drag hook that stiff end and core side are connected, and the side of preceding die ejector plate is equipped with core drag hook stop device, and core drag hook stop device is including transversely establishing the spacing hole of drag hook on the preceding die ejector plate, spacing downthehole drag hook stopper that is equipped with, and the drag hook stopper passes through the spring and is connected with the downthehole end in the spacing hole of drag hook.

In the technical solution of the present invention, a further preferred technical solution is: the outer side of the drag hook limiting block is obliquely provided with a buffer surface used for the joint of the hook surface of the core drag hook. Through setting up the buffering face, can let core drag hook and drag hook stopper gently contact to the counter force through the buffering face lets the core drag hook break away from the spacing hole of drag hook, can make things convenient for core drag hook and the spacing hole separation of drag hook like this.

The utility model relates to an among the two ejection mechanisms of injection mold front mould, further preferred technical scheme characteristic is: the hot runner plate is characterized by further comprising a guide rod, the upper end of the guide rod is connected with the hot runner plate, and the lower end of the guide rod is obliquely downwards connected with the cavity. Through setting up the guide bar, can make front mould and back mould not squint each other when the separation, separate more steadily.

The utility model relates to an among the two ejection mechanisms of injection mold front mould, further preferred technical scheme characteristic is: an anti-abrasion sliding sleeve is arranged at the contact part of the straight ejector rod and the cavity. Through setting up the abrasionproof sliding sleeve can avoid straight ejector pin and die cavity direct contact and cause wearing and tearing to can prolong the life of straight ejector pin.

The utility model relates to an among the two ejection mechanisms of injection mold front mould, further preferred technical scheme characteristic is: an anti-abrasion sliding sleeve is arranged at the contact part of the inclined ejector rod and the cavity. The abrasion-proof sliding sleeve can prevent the inclined ejector rod from being directly contacted with the cavity to cause abrasion, so that the service life of the inclined ejector rod can be prolonged.

Compared with the prior art, the utility model discloses following technological effect has: through setting up two ejection mechanism and directly ejecting mechanism and oblique ejection mechanism promptly, the front mould shifts up during the die sinking, front mould thimble board position is stable motionless simultaneously, make the ejector pin head keep contacting the roof pressure with the injection moulding spare of die cavity, make simultaneously to push up the back-off to one side keep with injection moulding spare inner structure lock joint, and the front mould directly pushes up the product and lets the product can be smooth leave the front mould, can avoid injection moulding spare and preceding die cavity card jail, impaired risk when not only can reducing injection moulding spare and mould die sinking, the structure of mould has still been simplified simultaneously, reduce mould manufacturing cost.

Drawings

FIG. 1 is a schematic structural view of a mold closing state of a front mold double ejection mechanism of an injection mold of the present invention;

FIG. 2 is a structural diagram of a front mold ejecting state of the front mold double-ejection mechanism of the injection mold of the present invention;

FIG. 3 is a schematic structural view of the end-of-mold-release state of the front mold double ejection mechanism of the injection mold of the present invention;

FIG. 4 is a cross-sectional view of the front mold double ejection mechanism of the injection mold of the present invention;

fig. 5 is a structural cross-sectional view of the front mold ejector plate of the injection mold front mold double ejection mechanism of the present invention.

In the figure, 1-upper compound plate, 2-hot runner plate, 3-bolt-nut structure, 4-front mould thimble bottom plate, 5-front mould thimble plate, 6-square iron, 7-cavity, 8-core, 9-mould foot, 10-lower compound plate, 11-lower rear mould thimble plate, 12-upper rear mould thimble plate, 13-rear mould thimble plate, 14-lower thimble, 15-core drag hook, 16-oblique mandril, 17-oblique jacking slide, 18-cavity drag hook, 19-top head, 20-injection molding piece, 21-drag hook limiting block, 22-spring, 23-drag hook fixing block, 24-oblique jacking inverted buckle, 25-anti-wear sliding sleeve, 26-guide bar upper fixing block, 27-guide bar, 28-guide bar lower fixing block, 29-screw, 30-anti-abrasion sliding sleeve, 31-straight ejector rod, 32-front mould ejector pin main board and 33-stroke limiting block

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings so as to facilitate the further understanding of the present invention by those skilled in the art, and do not constitute a limitation of the claims thereof.

Embodiment 1, referring to fig. 1, 2, 3, 4, and 5, a front mold double ejection mechanism of an injection mold comprises a front mold and a rear mold, wherein the front mold comprises an upper compound plate 1, a hot runner plate 2 disposed below the upper compound plate 1, a square iron 6 disposed below the hot runner plate 2, a cavity 7 disposed below the square iron 6, and a front mold ejector plate 5 disposed between the hot runner plate 2 and the cavity 7, the upper compound plate 1 is connected with the hot runner plate 2 through a bolt-nut structure, a side surface of the front mold ejector plate 5 is slidably connected with the square iron 6, and the slidably connected structure may be a conventional sliding chute and slider matching structure; the back mould includes lower multiple sheet 10, establishes the gauge foot 9 on lower multiple sheet 10, establishes core 8 on gauge foot 9, the vertical lower thimble 14 that runs through core 8, and lower thimble 14 is established on back mould thimble board 13, includes down back mould thimble board 11 and last back mould thimble board 12 on the back mould thimble board 13, and its improvement point lies in:

set up two liftout mechanisms on the front mould thimble board 5, two liftout mechanisms are including directly liftout mechanism and oblique liftout mechanism, directly liftout mechanism includes upper end and front mould thimble board 5 fixed connection's straight ejector pin 31, the lower extreme of straight ejector pin can vertically run through die cavity 7, the lower extreme setting of straight ejector pin is used for the roof pressure head 19 of roof pressure injection moulding piece 20, the mechanism that pushes up to one side includes the oblique ejector pin 16 that upper end and front mould thimble board 5 are connected, the other end of oblique ejector pin 16 can run through die cavity 7 to one side down, the lower extreme of oblique ejector pin 16 is equipped with the oblique top back-off 24 that is used for with the inner structure lock joint of injection moulding piece. When the mold is manufactured, the stroke of the front mold ejector plate 5 can be set, and when the front mold ejector plate 5 is located at the position corresponding to the highest point of the upper surface of the cavity, the ejector head 19 of the straight ejector rod and the inclined ejector reverse buckle 24 of the inclined ejector rod can just respectively eject and buckle the injection molded part 20. The front mold thimble plate includes a front mold thimble main plate 32 and a front mold thimble bottom plate 4. The upper end (tail end) of the straight ejector rod 31 is connected with the front mould ejector pin bottom plate 4 through a screw 29, the inclined ejector rod 16 is connected with the front mould ejector pin bottom plate 4 through an inclined ejector slide seat 17, and the inclined ejector slide seat 17 is fixed on the front mould ejector pin bottom plate 4.

Through setting up two ejection mechanism promptly directly to push out the mechanism and push out the mechanism to one side, the front mould shifts up during the die sinking, makes front mould thimble board position steady motionless simultaneously for top pressure head 19 keeps contact roof pressure with the injection moulding piece 20 of die cavity, makes the back-off 24 of pushing up to one side keep with the inner structure lock joint of injection moulding piece simultaneously, lets injection moulding piece 20 can be smooth leave the front mould, can avoid injection moulding piece and front mould cavity 7 card jail.

Example 2: as shown in fig. 1-3, a stroke limit block 33 of the front mold ejector plate 5 is arranged on one side of the lower surface of the front mold ejector plate 5, which is located on the straight ejection mechanism, and when the mold is opened, the stroke limit block 33 is in contact with the upper surface of the cavity 7, so that the mold opening action of the front mold is completed.

Example 3: as shown in fig. 1-4, the drawing device further comprises a drawing hook device, the drawing hook device comprises a cavity drawing hook 18 with a fixed end connected with the side surface of the hot runner plate 2 and a core drawing hook 15 with a fixed end connected with the side surface of the core 8, the side surface of the front mold ejector plate 5 is provided with a core drawing hook limiting device, the core drawing hook limiting device comprises a drawing hook limiting hole transversely arranged on the front mold ejector plate 5, a drawing hook limiting block 21 is arranged in the limiting hole, and the drawing hook limiting block 21 is connected with the bottom of the hole of the drawing hook limiting hole through a spring 22. When the mold is opened, the front mold is lifted, the core draw hook 15 is connected with the draw hook limiting hole to enable the front mold ejector plate 5 to keep stable in position, so that the straight ejector rod and the inclined ejector rod can fix the injection molded part, and the injection molded part can smoothly leave the front mold. A hook fixing block 23 can be further arranged in the limiting hole, and the shape of the hook fixing block 23 is matched with that of the core hook 15 to form a male buckle and a female buckle.

Example 4: as shown in fig. 1-5, a buffer surface is obliquely arranged at the joint of the hook surface of the core drag hook 15 and the outer side of the drag hook limiting block. The core drag hook 15 is pulled upwards to make the hook surface of the core drag hook 15 contact with the buffer surface of the drag hook limiting block, the drag hook limiting block 21 pushes the core drag hook 15 to be separated from the limiting hole under the pressure action of the spring 22, and then the ejection operation of the front mold is completed.

Example 5: as shown in fig. 1-3, the heat exchanger further comprises a guide rod 27, the upper end of the guide rod 27 is connected with the hot runner plate 2 through a guide rod upper fixing block 26, and the lower end of the guide rod 27 is connected with the cavity 7 through a guide rod lower fixing block 28 in an inclined downward manner.

Example 6: as shown in fig. 1-3, an anti-wear sliding sleeve 30 is provided on the portion of the straight ejector rod 31 contacting the cavity 7.

Example 7: as shown in fig. 1-3, an anti-wear sliding sleeve 25 is arranged on the part of the inclined ejector rod 16 contacting with the cavity 7.

The anti-abrasion sliding sleeve 30 and the anti-abrasion sliding sleeve 25 can be made of copper sleeves.

The utility model discloses a theory of operation: through setting up two ejection mechanism and directly ejecting mechanism and oblique ejection mechanism promptly, the front mould shifts up during the die sinking, makes front mould thimble board 5 position stabilization motionless simultaneously for ejector head 19 keeps the contact roof pressure with the injection moulding piece in the die cavity, makes oblique top back-off 24 keep the inner structure lock joint with injection moulding piece 20 simultaneously, and the front mould directly pushes up the product and lets the product can be smooth leave the front mould, can avoid injection moulding piece and front mould cavity card jail. And then the mold is continuously opened, after the mold is completely opened, the straight ejector rod and the inclined ejector rod are separated from the injection molded part 20, and then the lower rear mold ejector plate 11 is ejected under the action of the push rod of the injection molding machine, so that the rear mold ejector plate 13 is ejected upwards, the injection molded part is ejected out of the mold core, and the product demolding is completed.

Claims

1. A front mold double ejection mechanism of an injection mold comprises a front mold and a rear mold, wherein the front mold comprises an upper compound plate (1), a hot runner plate (2) arranged below the upper compound plate (1), square iron (6) arranged below the hot runner plate (2), a cavity (7) arranged below the square iron (6) and a front mold ejector plate (5) arranged between the hot runner plate (2) and the cavity (7); the back mould includes lower compound board (10), establish mould foot (9) on lower compound board (10), establish mould foot (9) above, vertically run through lower thimble (14) of mould core (8), its characterized in that:

front mould thimble board (5) on be equipped with two ejection mechanism, two ejection mechanism including straight ejection mechanism and push up the mechanism to one side, straight ejection mechanism include the upper end with front mould thimble board (5) fixed connection's straight ejector pin (31), the lower extreme of straight ejector pin can vertically run through die cavity (7), the lower extreme of straight ejector pin be equipped with roof pressure head (19) that are used for the roof pressure to mould plastics formed part (20), oblique ejection mechanism include the upper end with front mould thimble board (5) oblique ejector pin (16) of connecting, the other end of oblique ejector pin (16) can run through downwards to one side die cavity (7), the lower extreme of oblique ejector pin (16) be equipped with the oblique top back-off (24) that are used for with the inner structure lock joint of the formed part of moulding plastics.

2. The injection mold front mold double ejection mechanism of claim 1, wherein: and a stroke limiting block (33) of the front die ejector pin plate (5) is arranged on one side of the straight ejection mechanism, which is positioned on the lower surface of the front die ejector pin plate (5), and when the stroke limiting block (33) is in contact with the upper surface of the cavity (7), the die opening action of the front die is completed.

3. The injection mold front mold double ejection mechanism of claim 1, wherein: still include drawing of patterns drag hook device, drawing of patterns drag hook device include the stiff end with hot runner plate (2) side cavity drag hook (18) and stiff end of connecting with core (8) side core drag hook (15) of connecting, the side of front mould thimble board (5) be equipped with core drag hook stop device, core drag hook stop device includes transversely establishes the spacing hole of drag hook on front mould thimble board (5), spacing downthehole drag hook stopper that is equipped with, the drag hook stopper pass through the spring and be connected at the bottom of the hole in the spacing hole of drag hook.

4. The injection mold front mold dual ejection mechanism of claim 3, wherein: the outer side of the draw hook limiting block is obliquely provided with a buffer surface used for the joint of the draw hook surface of the core draw hook (15).

5. An injection mold front mold double ejection mechanism according to any one of claims 1-4, wherein: the hot runner plate is characterized by further comprising a guide rod (27), the upper end of the guide rod (27) is connected with the hot runner plate (2), and the lower end of the guide rod (27) is obliquely downwards connected with the cavity (7).

6. An injection mold front mold double ejection mechanism according to any one of claims 1-4, wherein: an anti-abrasion sliding sleeve is arranged on the contact part of the straight ejector rod (31) and the cavity (7).

7. The injection mold front mold double ejection mechanism according to claim 1 or 2, characterized in that: an anti-abrasion sliding sleeve is arranged at the contact part of the inclined ejector rod (16) and the cavity (7).