CN212400223U

CN212400223U - Side core-pulling mechanism and injection mold

Info

Publication number: CN212400223U
Application number: CN202021806054.4U
Authority: CN
Inventors: 袁林; 毛茂才; 贾宇霖; 段志平
Original assignee: Shenzhen Silver Basis Technology Co Ltd
Current assignee: Shenzhen Silver Basis Technology Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-01-26
Anticipated expiration: 2030-08-25

Abstract

The embodiment of the utility model discloses side mechanism of loosing core and injection mold, wherein side mechanism of loosing core includes slider, first ejector pin and the shifting block that is used for butt work piece surface, and the slider slidable sets up on injection mold, and first ejector pin can be followed the first direction and moved, and first ejector pin is equipped with the first spout that extends along the second direction, and the shifting block includes the sliding part that slidable set up in the first spout, and shifting block and slider fixed connection; when the first ejector rod moves along the first direction, the first ejector rod can drive the shifting block to move in the first sliding groove, so that the sliding block is driven to move along the third direction, and the sliding block is separated from the workpiece; adopt the utility model provides a side mechanism of loosing core drives the shifting block and the slider motion of being connected with the shifting block through first spout on the first ejector pin to this separation of slider and work piece is realized. Therefore, a complex structure or a large occupied space is not needed, the side core-pulling mechanism is simplified to a great extent, and the manufacturing cost is saved.

Description

Side core-pulling mechanism and injection mold

Technical Field

The utility model relates to the technical field of mold, especially, relate to a side mechanism of loosing core and injection mold.

Background

Injection molding refers to injecting molten plastic into a plastic product mold by pressure, and then cooling and molding the plastic product into various desired plastic shapes. Injection molding processes are also widely used in industrial production.

An injection mold generally includes an upper mold and a lower mold, which are opened and closed to complete the demolding of a plastic workpiece. If the side wall of the workpiece has a notch or is complex in shape, a side core-pulling mechanism is required. In the prior art, the side core-pulling mechanism mainly drives the sliding block to horizontally move through the combination of the sliding block and the inclined guide post so as to separate the sliding block from an injection molding workpiece. Fig. 1 shows a plastic workpiece, the left side of which is bent at a large angle downwards and provided with a catch at the bent part. For the plastic workpiece with a complex structure, if a traditional side core-pulling mechanism is adopted, the size of the mold is increased, the occupied space is increased, and meanwhile, the manufacturing cost is also increased. Therefore, it is urgent to develop a mechanism and a mold capable of effectively performing side core pulling on a plastic workpiece similar to that shown in fig. 1.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a side mechanism of loosing core and injection mold aims at solving the problem that the mould manufacturing cost is high of the figure 1 work piece of moulding plastics or similar work piece among the prior art.

In order to solve the above problem, the embodiment of the utility model provides a following technical scheme:

a side core-pulling mechanism is suitable for an injection mold and comprises a sliding block, a first ejector rod and a shifting block, wherein the sliding block is used for abutting against the outer surface of a workpiece, the sliding block is slidably arranged on the injection mold, the first ejector rod can move along a first direction, the first ejector rod is provided with a first sliding groove extending along a second direction, the shifting block comprises a sliding part slidably arranged in the first sliding groove, and the shifting block is fixedly connected with the sliding block; when the first ejector rod moves along the first direction, the first ejector rod can drive the shifting block to move in the first sliding groove, so that the sliding block is driven to move along the third direction, and the sliding block is separated from a workpiece.

In an exemplary embodiment, the first ejector rod is further provided with a second sliding groove extending along the first direction, and the first sliding groove is communicated with the second sliding groove; when the first ejector rod moves along the first direction, the sliding part can enter the second sliding groove along the first sliding groove.

In an exemplary embodiment, the sliding portion has a first abutment surface for abutment with the first chute inner wall and a second abutment surface for abutment with the second chute inner wall.

In an exemplary embodiment, a gap exists between the side wall of the first slide groove and the slide portion, and a gap exists between the side wall of the second slide groove and the slide portion when the slide portion moves into the second slide groove.

In an exemplary embodiment, the slider has a through hole extending in a first direction, and the first lift pin is inserted into the through hole.

In order to solve the problem, the utility model also provides an injection mold, including first mould and second mould, first mould with the second mould butt forms the die cavity that is used for the work piece of moulding plastics, the second mould includes as above the side mechanism of loosing core.

In an exemplary embodiment, the injection mold further comprises a mounting member and a power element for driving the mounting member to move along a first direction, and the first ejector rod is fixedly connected with the mounting member.

In an exemplary embodiment, the mounting part comprises a face needle plate and a bottom needle plate, the face needle plate and the bottom needle plate are arranged oppositely and fixedly connected, the face needle plate is provided with a stepped hole extending along a first direction, the first ejector rod penetrates through the stepped hole, and a boss matched with the stepped hole is formed in the radial direction of the end part of the first ejector rod in a protruding mode; the bottom needle plate is provided with a spring, one end of the spring is abutted to the first ejector rod, and the other end of the spring is abutted to the bottom needle plate.

In an exemplary embodiment, the injection mold further comprises a sloping block ejection mechanism, the sloping block ejection mechanism comprises a sloping block used for abutting against the inner surface of the workpiece and a second ejector rod capable of moving along a fourth direction, one end of the second ejector rod is fixedly connected with the sloping block, and the other end of the second ejector rod is fixedly connected with the mounting piece.

In an exemplary embodiment, the second die further comprises a wear plate fixedly mounted on the second die, the wear plate abuts against the slider, and an abutting surface of the wear plate and the slider extends in a third direction.

Adopt the embodiment of the utility model provides a side mechanism of loosing core and injection mold, first ejector pin is along the first direction motion, first spout is along the first direction motion along first ejector pin, because the sliding part setting of shifting block is in first spout, and first spout extends along the second direction, and the effort of a perpendicular to second direction is applyed to the sliding part of shifting block to first spout in the motion process, and under this effort, the slider slides on injection mold, breaks away from the work piece to accomplish the side work of loosing core. Therefore, a complex structure or a large occupied space is not needed, the side core-pulling mechanism is simplified, and the manufacturing cost is greatly saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 creative efforts.

Wherein:

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

FIG. 2 is a structural diagram of the side core-pulling mechanism provided by the present invention;

FIG. 3 is an assembly view of the first carrier rod and the shifting block of the side core pulling mechanism shown in FIG. 2;

fig. 4 is a perspective view of the shifting block provided by the present invention;

FIG. 5 is a structural diagram of the injection mold according to the present invention;

fig. 6 is a sectional view of the injection mold provided by the present invention.

Reference numerals: v1-first direction, V2-second direction, V3-third direction, V4-fourth direction; 00-workpiece, 10-second die, 20-mounting piece, 30-power element, 40-reset rod, 110-side core-pulling mechanism, 111-slide block, 1111-first abutting block, 1112-first placing cavity, 1113-second abutting block, 1114-second placing cavity, 1115-through hole, 1120-first ejector rod, 1130-shifting block, 1121-first sliding groove, 1122-second sliding groove, 1123-boss, 1132-sliding part, 1133-first abutting surface, 1134-second abutting surface, 120-channel, 131-second ejector rod, 132-inclined block, 140-wear-resisting plate, 210-surface needle plate, 211-stepped hole, 220-bottom needle plate and 230-spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

An embodiment of the present invention provides a side core pulling mechanism 110, please refer to fig. 2-3, which is suitable for an injection mold, including a sliding block 111, a first ejector pin 1120 and a shifting block 1130, which are used for abutting against the outer surface of a workpiece 00, the sliding block 111 is slidably disposed on the injection mold, the first ejector pin 1120 can move along a first direction and the first ejector pin 1120 is provided with a first sliding groove 1121 extending along a second direction V2, the shifting block 1130 includes a sliding portion 1132 slidably disposed in the first sliding groove 1121, and the shifting block 1130 is fixedly connected to the sliding block 111. When the first top rod 1120 moves along the first direction V1, the first top rod 1120 can drive the shifting block 1130 to move in the first sliding slot 1121, so as to drive the sliding block 111 to move along the third direction V3, so as to separate the sliding block 111 from the workpiece 00.

Specifically, when the side core pulling mechanism 110 provided above works, the first push rod 1120 moves along the first direction V1, the first sliding groove 1121 moves along with the first push rod 1120 along the first direction V1, because the sliding portion 1132 is disposed in the first sliding groove 1121, and the first sliding groove 1121 extends along the second direction V2, the first sliding groove 1121 applies a force perpendicular to the second direction V2 to the sliding portion 1132 during the movement, and under the force, the slider 111 slides on the injection mold and is separated from the workpiece 00, thereby completing the side core pulling work.

By adopting the side core pulling mechanism 110 provided above, the first sliding chute 1121 on the first ejector rod 1120 drives the shifting block 1130 and the sliding block 111 connected with the shifting block 1130 to move, so that the sliding block 111 is separated from the workpiece 00. Therefore, the side core-pulling mechanism 110 is greatly simplified, a complex structure or a structure with relatively large occupied space is not needed, and the manufacturing cost is saved.

Further, the side core pulling mechanism 110 is provided with a plurality of first push rods 1120 which are oppositely arranged, and the plurality of first push rods 1120 synchronously drive the sliding block 111 to move, so that the sliding block 111 moves more stably.

In the present embodiment, referring to fig. 2, the injection mold includes a first mold and a second mold 10, and the side core pulling mechanism 110 is disposed on the second mold 10. The slider 111 is provided with a plurality of first placing cavities 1112 and a plurality of second placing cavities 1114. The first placing cavity 1112 is detachably provided with a first abutting block 1111, and the first abutting block 1111 can be used for abutting against a shovel machine on a first die when the injection mold is closed so as to fix the sliding block 111. The second placing chamber 1114 is detachably provided with a second abutting block 1113, and the second abutting block 1113 can abut against the first mold when the molds are closed, so that the pressure at the parting surface is shared.

In the present embodiment, please refer to fig. 3, the first top rod 1120 further has a second sliding slot 1122 extending along the first direction V1, and the first sliding slot 1121 is communicated with the second sliding slot 1122; when the first top bar 1120 moves in the first direction V1, the sliding portion 1132 of the pick 1130 may enter the second sliding slot 1122 along the first sliding slot 1121. Specifically, after the first ejector rod 1120 drives the slider 111 to move for a certain distance, the slider 111 has completed the side core pulling work, and the slider 111 continues to slide again without any beneficial effect, and increasing the stroke of the slider 111 will result in an increase in the mold volume. Therefore, the second sliding slot 1122 extending along the first direction V1 is provided in the present embodiment, after the slider 111 is demolded, the sliding portion 1132 of the shifting block 1130 enters the second sliding slot 1122, at this time, the sliding portion 1132 of the shifting block 1130 no longer receives the acting force of the first top rod 1120, and the slider 111 no longer generates displacement.

Referring to fig. 4, the sliding portion 1132 of the shifting block 1130 has a first contact surface 1133 for contacting with an inner wall of the first sliding slot 1121 and a second contact surface 1134 for contacting with an inner wall of the second sliding slot 1122. Preferably, a transition radius is formed between the first abutment surface 1133 and the second abutment surface 1134. Since the shifting block 1130 is fixedly connected with the sliding block 111, the shifting block 1130 cannot rotate in the sliding process. The first and

second abutting surfaces

1133 and 1134 are provided to facilitate the sliding of the shifting block 1130 in the first and second

sliding slots

1121 and 1122.

Further, there is a gap between the side wall of the first sliding groove 1121 and the sliding portion 1132 of the dial 1130, and when the sliding portion 1132 moves into the second sliding groove 1122, there is a gap between the side wall of the second sliding groove 1122 and the sliding portion 1132. Therefore, on one hand, the assembly is convenient, and on the other hand, the phenomenon that the shifting block 1130 is blocked due to machining errors of the first sliding groove 1121 and the second sliding groove 1122 can be avoided.

In the present embodiment, referring to fig. 2, the slider 111 has a through hole 1115 extending along the first direction V1, and the first lift pin 1120 penetrates through the through hole 1115. The first ejector rod 1120 is arranged inside the sliding block 111, so that the internal space of the mold is greatly saved, and the structural compactness of the side core pulling mechanism 110 is enhanced.

In order to solve the above problem, please refer to fig. 5, an embodiment of the present invention further provides an injection mold, including a first mold (not shown in the figure) and a second mold 10, the first mold and the second mold 10 abut to form a cavity for injecting the workpiece 00, and the second mold 10 includes the side core pulling mechanism 110 as described above.

By adopting the injection mold provided by the invention, the first mold and the second mold 10 are matched to form the cavity of the injection molding workpiece 00, and then the side core-pulling mechanism 110 described above is used for forming the side part of the workpiece 00 and completing the side core-pulling operation, so that the structure of the injection mold is greatly simplified, a complex structure or a structure with relatively large occupied space is not needed, and the manufacturing cost is saved.

In this embodiment, the second mold 10 is provided with a plurality of channels 120, each channel 120 is provided with a guide sleeve and a guide rod, one end of the guide rod is fixed on the first mold, and the other end of the guide rod passes through the second mold 10 and is fixed on the base of the injection mold, so that the second mold 10 can slide relative to the first mold.

In the present embodiment, the injection mold further includes a mounting member 20 and a power element 30 for driving the mounting member 20 to move along a first direction V1, and the first ejector bar 1120 is fixedly connected to the mounting member 20. The power element 30 drives the mounting member 20 to move along the first direction V1, so as to drive the first push rod 1120 to move along the first direction V1.

Preferably, the power element 30 is a hydraulic cylinder. Of course, other mechanisms capable of moving the mounting member 20 along the first direction V1 may be used, such as an air cylinder or a combination of an electric motor and a lead screw.

Furthermore, the injection mold is also provided with a plurality of reset rods 40 extending along the first direction V1; each restoring rod 40 passes through the second die 10, and one end of the restoring rod 40 is fixedly connected with the mounting member 20. A plurality of projections for abutting against the return arm 40 are provided on the first die of the injection mold. When the dies are closed, the first and second dies 10 approach each other, and the protrusions on the first die can abut against the corresponding reset rod 40 to restore the mounting member 20 to the initial position.

In this embodiment, please refer to fig. 6, the mounting member 20 includes a surface plate 210 and a bottom plate 220, the surface plate 210 and the bottom plate 220 are oppositely arranged and fixedly connected, the surface plate 210 has a stepped hole 211 extending along a first direction V1, a first top bar 1120 penetrates through the stepped hole 211, and an end of the first top bar 1120 protrudes outward in a radial direction to form a boss 1123 for matching with the stepped hole 211; the bottom needle plate 220 is provided with a spring 230, one end of the spring 230 abuts against the first top bar 1120, and the other end of the spring 230 abuts against the bottom needle plate 220.

Specifically, the first push rod 1120 is fixed in the stepped hole 211 by the spring 230, so that the first push rod 1120 can perform a small displacement in the first direction V1. Because there are machining error or assembly error, etc. factors in injection mold, so design, can effectively eliminate these errors to in embedding sliding portion 1132 of shifting block 1130 in first spout 1121 better.

In this embodiment, the injection mold further includes a slanted block 132 ejection mechanism, the slanted block 132 ejection mechanism includes a slanted block 132 for abutting against the inner surface of the workpiece 00 and a second ejector rod 131 movable along a fourth direction V4, one end of the second ejector rod 131 is fixedly connected to the slanted block 132, and the other end of the second ejector rod 131 is fixedly connected to the mounting member 20. Specifically, the power element 30 drives the mounting member 20 to move in the first direction V1, and the mounting member 20 can drive the first push rod 1120 and the second push rod 131 to move simultaneously. The second top rod 131 drives the inclined block 132 to move along the fourth direction V4, the inclined block 132 drives the workpiece 00 to move, and the first top rod 1120 drives the sliding block 111 to move towards the third direction V3. Therefore, the injection mold can complete side core pulling work while an injection molding part is ejected out.

Further, in order to achieve the effect of synchronous movement of the slider 111 and the inclined block 132, the third direction V3 and the fourth direction V4 are perpendicular to each other.

Further, for better movement of the first ejector pin 1120 and the second ejector pin 131, a guide sleeve or a sliding bearing or other devices capable of reducing sliding friction may be sleeved on the outer peripheries of the first ejector pin 1120 and the second ejector pin 131.

As shown in fig. 6, the second die 10 further includes a wear plate 140, the wear plate 140 is fixedly mounted on the second die 10, the wear plate 140 abuts against the slider 111, and an abutting surface of the wear plate 140 and the slider 111 extends along the third direction V3. Since the slide block 111 slides in the second mold 10, the injection mold and the slide block 111 are easily worn, and therefore, the wear plate 140 is detachably mounted at the sliding position of the slide block 111, so that the injection mold can be maintained in a better state by replacing the wear plate 140. Preferably, the wear plate 140 is made of a material having a low coefficient of friction and wear resistance.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A side core pulling mechanism is suitable for an injection mold to perform side core pulling on a workpiece and is characterized by comprising a sliding block, a first ejector rod and a shifting block, wherein the sliding block is used for abutting against the outer surface of the workpiece;

when the first ejector rod moves along the first direction, the first ejector rod can drive the shifting block to move in the first sliding groove, so that the sliding block is driven to move along the third direction, and the sliding block is separated from a workpiece.

2. The side core pulling mechanism according to claim 1, wherein the first ejector rod is further provided with a second sliding groove extending in the first direction, and the first sliding groove is communicated with the second sliding groove;

when the first ejector rod moves along the first direction, the sliding part can enter the second sliding groove along the first sliding groove.

3. The side core pulling mechanism according to claim 2, wherein the sliding portion has a first abutting surface for abutting against the first chute inner wall and a second abutting surface for abutting against the second chute inner wall.

4. The side core pulling mechanism according to claim 3, wherein a gap exists between the side wall of the first sliding groove and the sliding portion, and when the sliding portion moves into the second sliding groove, a gap exists between the side wall of the second sliding groove and the sliding portion.

5. The side core pulling mechanism according to claim 1, wherein the slider has a through hole extending in a first direction, and the first ejector rod is inserted into the through hole.

6. An injection mold, characterized by comprising a first mold and a second mold, wherein the first mold and the second mold are abutted to form a cavity for injecting a workpiece, and the second mold comprises the side core pulling mechanism according to any one of claims 1 to 5.

7. An injection mold according to claim 6, further comprising a mounting member and a power element for driving the mounting member in a first direction, wherein the first ejector pin is fixedly connected to the mounting member.

8. The injection mold according to claim 7, wherein the mounting member comprises a face needle plate and a bottom needle plate, the face needle plate and the bottom needle plate are oppositely arranged and fixedly connected, the face needle plate is provided with a stepped hole extending along a first direction, the first ejector rod is arranged in the stepped hole in a penetrating manner, and a boss matched with the stepped hole is formed by protruding the end part of the first ejector rod outwards in the radial direction; the bottom needle plate is provided with a spring, one end of the spring is abutted to the first ejector rod, and the other end of the spring is abutted to the bottom needle plate.

9. The injection mold of claim 7, further comprising a swash block ejection mechanism, wherein the swash block ejection mechanism comprises a swash block for abutting against an inner surface of a workpiece and a second ejector rod movable in a fourth direction, one end of the second ejector rod is fixedly connected with the swash block, and the other end of the second ejector rod is fixedly connected with the mounting member.

10. An injection mould according to claim 6, wherein the second mould further comprises a wear plate fixedly mounted on the second mould, the wear plate abutting the slide, and an abutting surface of the wear plate and the slide extending in a third direction.