Injection mold convenient to demold

Abstract

The utility model discloses an injection mold convenient to demold. The injection mold convenient to demold comprises a top plate, an upper mold base, a lower mold base, a bottom plate, a demolding driving mechanism, a first core-pulling insert, a second core-pulling insert and a third core-pulling insert, a first cavity seat is arranged at the bottom of the upper die seat, a second cavity seat is arranged at the top of the lower die seat, two symmetrically-arranged forming cavities are formed between the first cavity seat and the second cavity seat, each forming cavity is provided with a first pipe opening, a second pipe opening and a third pipe opening, and the first core-pulling insert is arranged at the side end of the first pipe opening. The second core-pulling insert is arranged at the side end of the second pipe opening, the third core-pulling insert is arranged at the side end of the third pipe opening, and the demolding driving mechanism is connected with the first core-pulling insert. The first core-pulling insert, the second core-pulling insert and the second core-pulling insert are respectively arranged on the pipe orifices in different directions of the forming cavity, so that independent core-pulling operation of the three-way pipe fitting in all directions can be realized, mutual interference in the core-pulling process is effectively avoided, and the demoulding smoothness of a product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold field especially relates to an injection mold convenient to demould. BACKGROUND

[0002] Injection mold is a special mold for injection molding process, is widely used in the production of plastic products, injection mold through the molten state's thermoplastic material is injected into the mold cavity, in the mold cooling and solidification, form the plastic product with specific shape.

[0003] In the prior art, when the injection mold is used for injection molding of the tee pipe product, the tee pipe has multiple pipe openings and a complex lateral structure, so that the injection mold is difficult to smoothly core-pulling the lateral structure in multiple directions during demolding, which can easily cause the molded injection product to be stuck in the mold, affect the smoothness of product demolding, and even cause defects on the product surface.

[0004] Therefore, the prior art has defects and needs to be improved. INVENTION CONTENTS

[0005] The utility model wants to solve the technical problem of providing a kind of injection mold convenient to demould, which avoids product defect and improves product yield.

[0006] To achieve this purpose, the utility model adopts the following technical scheme: a kind of injection mold convenient to demould, including top plate, upper die holder, lower die holder, bottom plate, demolding drive mechanism, first core-pulling insert, second core-pulling insert and third core-pulling insert;

[0007] The top plate is provided on the top of the upper die holder, the bottom plate is provided on the bottom of the lower die holder, the upper die holder is provided above the lower die holder, and the upper die holder and the lower die holder are slidably connected by guide columns;

[0008] The bottom of the upper die holder is provided with a first cavity seat, and the top of the lower die holder is provided with a second cavity seat, and two symmetrical forming chambers are formed between the first cavity seat and the second cavity seat.

[0009] The forming chamber is used for injection molding tee pipe, and the forming chamber has a first pipe opening, a second pipe opening and a third pipe opening, the first pipe opening and the second pipe opening are located on the same axis and are perpendicular to the third pipe opening.

[0010] The first core-pulling insert is provided at the side end of the first pipe opening, the second core-pulling insert is provided at the side end of the second pipe opening, and the third core-pulling insert is provided at the side end of the third pipe opening.

[0011] The demolding driving mechanism is arranged at the side end of the lower die seat and connected with the first core-pulling insert, and is used to drive the first core-pulling insert to move away from the first nozzle.

[0012] With the technical scheme, the first core-pulling insert comprises a first sliding base, a first sliding rail, an inclined lifting seat and a first insert.

[0013] The lower die seat at the side end of the first nozzle is provided with a first sliding groove, the first sliding rail is located at both sides of the first sliding groove, the first sliding base is arranged on the first sliding rail and can slide along the extension direction of the first sliding rail, and two first inserts are arranged on the side wall of the first sliding base and partially extend into the first nozzle.

[0014] The first sliding base is provided with a pushing inclined surface on the side surface away from the first insert, the side wall of the inclined lifting seat is provided with a stress inclined surface abutting against the pushing inclined surface, the top of the inclined lifting seat is connected with the upper die seat, and the inclined lifting seat is used to push the upper die seat to move upward when the first sliding base moves away from the first nozzle, so as to realize mold opening.

[0015] With the technical scheme, the demolding driving mechanism comprises a mounting frame, a driving oil cylinder, a connecting arm and a second sliding rail.

[0016] The mounting frame is arranged on the side wall of the lower die seat, the driving oil cylinder is arranged on the mounting frame, the movable end of the driving oil cylinder is arranged towards the first sliding base and connected with the first sliding base through the connecting arm, and the driving oil cylinder is used to drive the first sliding base to move linearly back and forth.

[0017] The first sliding base is provided with a second sliding groove at both sides, the second sliding rail is located in the second sliding groove and can move along the extension direction of the second sliding groove, and the bottom of the connecting arm is connected with the second sliding rail through a fixing plate.

[0018] With the technical scheme, the first core-pulling insert further comprises a wear-resistant plate, and the wear-resistant plate is arranged on the lower die seat at the bottom of the first sliding base.

[0019] With the technical scheme, the second core-pulling insert comprises a second sliding base, a second insert and an inclined guide column.

[0020] The lower die seat of the second nozzle side end is provided with a third sliding groove, the second sliding seat is located in the third sliding groove and can move along the extension direction of the third sliding groove, and two second inserts are arranged on the side walls of the second sliding seat and partially extend into the second nozzle;

[0021] The second sliding seat is provided with a through inclined hole, the inclined guide column is located in the inclined hole, the top of the inclined guide column is connected with the upper die seat, and the inclined guide column is used for pushing the second sliding seat to move away from the second nozzle to draw out the second insert from the second nozzle along with the upward movement of the upper die seat.

[0022] By adopting the technical scheme, the second core-pulling insert of the injection mold convenient for demolding further comprises a limiting pressing plate, the limiting pressing plate is arranged on both sides of the third sliding groove, and the bottom surface of the limiting pressing plate abuts against the second sliding seat.

[0023] By adopting the technical scheme, the third core-pulling insert of the injection mold convenient for demolding comprises a third sliding seat, a third insert, a third sliding rail and a guide pushing plate.

[0024] The third sliding rail is arranged on the lower die seat of the third nozzle side end, the bottom of the third sliding seat is provided with a fourth sliding groove connected with the third sliding rail, the third sliding seat can slide along the extension direction of the third sliding rail, the third insert is arranged on the side wall of the third sliding seat and partially extends into the third nozzle, and the third sliding rail is arranged on the lower die seat of the third nozzle side end.

[0025] The guide pushing plate is located on both sides of the third sliding seat, the top of the guide pushing plate is connected with the upper die seat, the side surface of the guide pushing plate close to the third sliding seat is provided with a guide inclined groove, the pushing rod is located in the guide inclined groove, and the guide pushing plate is used for pushing the third sliding seat to move away from the third nozzle to draw out the third insert from the third nozzle along with the upward movement of the upper die seat.

[0026] Compared with the prior art, the injection mold convenient for demolding has the following beneficial effects:

[0027] The first core-pulling insert, the second core-pulling insert and the first core-pulling insert arranged on the nozzles in different directions of the forming chamber can realize independent core-pulling operation in each direction of the three-way pipe fitting, effectively avoid mutual interference in the core-pulling process and improve the demolding smoothness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0029] The structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application. Therefore, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the functions and purposes of the present application, should still fall within the scope of the technical content disclosed by the present application.

[0030] Figure 1 The overall structure of the present application is shown in the figure;

[0031] Figure 2 The upper die seat opening structure of the present application is shown in the figure;

[0032] Figure 3 The first cavity seat installation structure of the present application is shown in the figure;

[0033] Figure 4 The lower die seat installation structure of the present application is shown in the figure;

[0034] Figure 5 The first core-pulling insert and the second core-pulling insert structure of the present application is shown in the figure;

[0035] Figure 6 The third core-pulling insert structure of the present application is shown in the figure. DETAILED DESCRIPTION

[0036] In order to make the utility model purpose, features, advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the embodiments described below are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 6 As shown, this utility model embodiment provides an injection mold with convenient demolding, including a top plate 1, an upper mold base 2, a lower mold base 3, a bottom plate 4, a demolding drive mechanism 5, a first core-pulling insert 6, a second core-pulling insert 7, and a third core-pulling insert 8. The top plate 1 is located at the top of the upper mold base 2, the bottom plate 4 is located at the bottom of the lower mold base 3, the upper mold base 2 is located above the lower mold base 3, and the upper mold base 2 and the lower mold base 3 are slidably connected by a guide post 9. By setting the guide post 9 between the upper mold base 2 and the lower mold base 3, the stability of the upper mold base 2 during the mold opening and closing process can be improved.

[0040] The upper mold base 2 has a first cavity base 21 at its bottom, and the lower mold base 3 has a second cavity base 31 at its top. Two symmetrically arranged molding chambers 20 are formed between the first cavity base 21 and the second cavity base 31. The molding chambers 20 are used for injection molding tee fittings. Each molding chamber 20 has a first pipe opening 201, a second pipe opening 202, and a third pipe opening 203. The first pipe opening 201 and the second pipe opening 202 are located on the same axis and are perpendicular to the third pipe opening 203. The symmetrically arranged molding chambers 20 can produce two identical products simultaneously in each injection molding process, effectively improving production efficiency.

[0041] The first core-pulling insert 6 is located at the side end of the first pipe opening 201, the second core-pulling insert 7 is located at the side end of the second pipe opening 202, and the third core-pulling insert 8 is located at the side end of the third pipe opening 203. With this arrangement, the core-pulling insert for each pipe opening is set separately, which allows the injection mold to pull the core independently in its own direction when the mold is opened. This avoids interference caused by complex structures and ensures that the molded part of each pipe opening can be smoothly removed during the mold opening process, thereby improving the smoothness of demolding of the tee fitting product.

[0042] The demolding driving mechanism 5 is arranged at the side end of the lower mold base 3 and connected with the first core-pulling insert 6. The demolding driving mechanism 5 is used to drive the first core-pulling insert 6 to move away from the first pipe opening 201. Specifically, the first core-pulling insert 6 comprises a first sliding base 61, a first sliding rail 62, an inclined lifting base 63 and a first insert 64. The lower mold base 3 at the side end of the first pipe opening 201 is provided with a first sliding groove 301. The first sliding rail 62 is located at both sides of the first sliding groove 301. The first sliding base 61 is arranged on the first sliding rail 62 and can slide along the extension direction of the first sliding rail 62. Two first inserts 64 are arranged on the side walls of the first sliding base 61, and the first inserts 64 partially extend into the first pipe opening 201. The first sliding base 61 away from the side of the first insert 64 is provided with a pushing inclined surface 610. The side wall of the inclined lifting base 63 is provided with a stress inclined surface 630 which abuts against the pushing inclined surface 610. The top of the inclined lifting base 63 is connected with the upper mold base 2. The inclined lifting base 63 is used to push the upper mold base 2 to move upward when the first sliding base 61 moves away from the first pipe opening 201, so as to realize mold opening. The first insert 64 partially extends into the first pipe opening 201 and is in contact with the inner wall of the product to form a shape. During the demolding process, the first sliding base 61 slides away from the first pipe opening 201 along the first sliding rail 62, so that the first insert 64 can smoothly exit the forming chamber 20 and prevent structural damage to the surface of the product during demolding. At the same time, the stress inclined surface 630 on the inclined lifting base 63 abuts against the pushing inclined surface 610 of the first sliding base 61. When the first sliding base 61 slides away from the first pipe opening 201, the upper mold base 2 can be pushed upward by the inclined lifting base 63, so that it is separated from the lower mold base 3, thereby realizing automatic mold opening and effectively improving the demolding efficiency.

[0043] As Figure 2 And Figure 4As shown, further, the demolding driving mechanism 5 comprises a mounting frame 51, a driving oil cylinder 52, a connecting arm 53 and a second sliding rail 54, the mounting frame 51 is arranged on the side wall of the lower mold base 3, the driving oil cylinder 52 is arranged on the mounting frame 51, the movable end of the driving oil cylinder 52 is arranged towards the first sliding seat 61 and is connected with the first sliding seat 61 through the connecting arm 53, the driving oil cylinder 52 is used to drive the first sliding seat 61 to move linearly back and forth, the second sliding groove 302 is arranged on both sides of the first sliding seat 61, the second sliding rail 54 is located in the second sliding groove 302, the second sliding rail 54 can move along the extension direction of the second sliding groove 302, and the bottom of the connecting arm 53 is connected with the second sliding rail 54 through the fixing plate 55. The movable end of the driving oil cylinder 52 is connected with the first sliding seat 61 through the connecting arm 53, so that the driving oil cylinder 52 can drive the first sliding seat 61 to move linearly back and forth, thereby realizing automatic control of the core pulling process; the second sliding groove 302 is arranged on both sides of the first sliding seat 61, and the second sliding rail 54 is arranged in the second sliding groove 302, so that the second sliding rail 54 can slide in the second sliding groove 302, thereby further enhancing the stability of the movement of the first sliding seat 61.

[0044] As shown in Figure 4 Further, the first core pulling insert 6 further comprises a wear plate 65, and the wear plate 65 is arranged on the lower mold base 3 at the bottom of the first sliding seat 61. During the core pulling process, the first sliding seat 61 will slide on the lower mold base 3 repeatedly, so that the surface of the lower mold base 3 is abraded. The arrangement of the wear plate 65 can protect the lower mold base 3 from being abraded, and only the wear plate 65 needs to be replaced, instead of the whole lower mold base 3.

[0045] As shown in Figure 4 and Figure 5As shown, further, the second core-pulling insert 7 comprises a second slide 71, second inserts 72 and an inclined guide pillar 73. The lower die seat 3 at the side end of the second pipe opening 202 is provided with a third sliding groove 303. The second slide 71 is located in the third sliding groove 303 and can move along the extension direction of the third sliding groove 303. Two second inserts 72 are arranged on the side wall of the second slide 71 and partially extend into the second pipe opening 202. The second slide 71 is provided with an inclined hole 710 penetrating through the second slide 71. The inclined guide pillar 73 is located in the inclined hole 710 and the top of the inclined guide pillar 73 is connected with the upper die seat 2. The inclined guide pillar 73 is used to push the second slide 71 to move away from the second pipe opening 202 along the direction of the movement of the upper die seat 2 to pull out the second insert 72 from the second pipe opening 202. When the upper die seat 2 moves upward, the inclined guide pillar 73 can form an inclined pushing force on the second slide 71, so as to promote the second slide 71 to move away from the second pipe opening 202 along the direction of the third sliding groove 303, so that the second insert 72 can smoothly exit from the second pipe opening 202, and the product is prevented from being scratched due to improper core-pulling direction.

[0046] As shown in Figure 5 further, the second core-pulling insert 7 further comprises a limiting pressing plate 74. The limiting pressing plate 74 is arranged on both sides of the third sliding groove 302 and the bottom surface of the limiting pressing plate 74 abuts against the second slide 71. The arrangement of the limiting pressing plate 74 can prevent the second slide 71 from deviating during the movement and improve the movement precision during the core-pulling process.

[0047] As shown in Figure 5 and Figure 6As shown, further, the third core-pulling insert 8 comprises a third sliding base 81, a third insert 82, a third sliding rail 83 and a guide push plate 84. The third sliding rail 83 is arranged on the lower die seat 3 at the side end of the third pipe opening 203. The bottom of the third sliding base 81 is provided with a fourth sliding groove 810 connected with the third sliding rail 83. The third sliding base 81 can slide along the extending direction of the third sliding rail 83. The third insert 82 is arranged on the side wall of the third sliding base 81 and partially extends into the third pipe opening 203. Push rods 811 are arranged on the two side walls of the third sliding base 81. The guide push plate 84 is located on the two sides of the third sliding base 81 and the top of the guide push plate 84 is connected with the upper die seat 2. The guide push plate 84 is provided with a guide inclined groove 840 on the side surface close to the third sliding base 81. The push rods 811 are located in the guide inclined groove 840. The guide push plate 84 is used to push the third sliding base 81 to move away from the third pipe opening 203 along the direction of the rising movement of the upper die seat 2, so as to pull out the third insert 82 from the third pipe opening 203. When the upper die seat 2 moves upward, the guide push plate 84 also rises. Since the guide inclined groove 840 is arranged on the guide push plate 84 and the push rods 811 are located in the guide inclined groove 840, the push rods 811 can be driven by the pushing force of the guide inclined groove 840 to move the third sliding base 81 away from the third pipe opening 203, so as to realize the synchronous action of mold opening and core pulling without the help of an additional power device, effectively simplifying the overall structure and improving the production efficiency.

[0048] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An injection mold that facilitates demolding, characterized in that, It includes a top plate, an upper mold base, a lower mold base, a bottom plate, a demolding drive mechanism, a first core-pulling insert, a second core-pulling insert, and a third core-pulling insert; The top plate is located at the top of the upper mold base, the bottom plate is located at the bottom of the lower mold base, the upper mold base is located above the lower mold base, and the upper mold base and the lower mold base are slidably connected by guide posts; The upper mold base is provided with a first cavity seat at the bottom, and the lower mold base is provided with a second cavity seat at the top, forming two symmetrically arranged molding chambers between the first cavity seat and the second cavity seat; The molding chamber is used for injection molding of tee fittings. The molding chamber has a first pipe opening, a second pipe opening and a third pipe opening. The first pipe opening and the second pipe opening are located on the same axis and are perpendicular to the third pipe opening. The first core-pulling insert is disposed at the first pipe opening side end, the second core-pulling insert is disposed at the second pipe opening side end, and the third core-pulling insert is disposed at the third pipe opening side end; The demolding drive mechanism is located on the side of the lower mold base and is connected to the first core-pulling insert. The demolding drive mechanism is used to drive the first core-pulling insert to move in a direction away from the first tube opening.

2. The injection mold with convenient demolding according to claim 1, characterized in that, The first core-pulling insert includes a first slide block, a first slide rail, an inclined top block, and a first insert; The lower mold base at the first port end is provided with a first slide groove, the first slide rail is located on both sides of the first slide groove, the first slide block is provided on the first slide rail and can slide along the extension direction of the first slide rail, and two first inserts are provided on the side wall of the first slide block, and the first inserts extend into the first port. The first slide block has a pushing inclined surface on its side away from the first insert, and the side wall of the inclined top seat has a force-bearing inclined surface that abuts against the pushing inclined surface. The top of the inclined top seat is connected to the upper mold seat. The inclined top seat is used to push the upper mold seat upward when the first slide block moves away from the first tube opening, so as to realize mold opening.

3. The injection mold with convenient demolding according to claim 2, characterized in that, The demolding drive mechanism includes a mounting bracket, a drive cylinder, a connecting arm, and a second slide rail; The mounting bracket is mounted on the side wall of the lower mold base, the driving cylinder is mounted on the mounting bracket, the movable end of the driving cylinder faces the first slide block and is connected to the first slide block through the connecting arm, and the driving cylinder is used to drive the first slide block to reciprocate linearly. The first slide block has a second slide groove on both sides, the second slide rail is located in the second slide groove, the second slide rail can move along the extension direction of the second slide groove, and the bottom of the connecting arm is connected to the second slide rail through a fixing plate.

4. The injection mold with convenient demolding according to claim 3, characterized in that, The first core-pulling insert also includes a wear-resistant plate, which is disposed on the lower mold base at the bottom of the first slide.

5. The injection mold with convenient demolding according to claim 1, characterized in that, The second core-pulling insert includes a second slide, a second insert, and a slanted guide post; The lower mold base at the second port side end is provided with a third slide groove, the second slide base is located in the third slide groove and can move along the extension direction of the third slide groove, and two second inserts are provided on the side wall of the second slide base, and the second inserts partially extend into the second port. The second slide has a through-hole, the inclined guide post is located in the inclined hole, and the top of the inclined guide post is connected to the upper mold base. The inclined guide post is used to push the second slide to move away from the second tube opening as the upper mold base moves upward, so as to pull the second insert out of the second tube opening.

6. The injection mold with convenient demolding according to claim 5, characterized in that, The second core-pulling insert also includes a limiting pressure plate, which is disposed on both sides of the third slide groove, and the bottom surface of the limiting pressure plate abuts against the second slide block.

7. The injection mold with convenient demolding according to claim 1, characterized in that, The third core-pulling insert includes a third slide block, a third insert, a third slide rail, and a guide push plate; The third slide rail is provided on the lower mold base at the side end of the third pipe opening. The bottom of the third slide base is provided with a fourth slide groove connected to the third slide rail. The third slide base can slide along the extension direction of the third slide rail. The third insert is provided on the side wall of the third slide base, and the third insert part extends into the third pipe opening. Push rods are provided on both side walls of the third slide block. Guide push plates are located on both sides of the third slide block, and the top of the guide push plates is connected to the upper mold base. A guide groove is provided on the side of the guide push plate near the third slide block, and the push rods are located within the guide groove. The guide push plate is used to move along the slide block. The upward movement of the upper mold base pushes the third slide block to move away from the third tube opening. The third insert is then pulled out from the third port.

Images