Injection mold with inner pulling structure

Abstract

The utility model relates to the technical field of injection molding devices, and provides an injection mold with an inner pulling structure, which comprises a fixed mold assembly and a movable mold assembly, the movable mold assembly is provided with a movable mold base, a movable mold cavity block and a movable mold frame, an inner sliding block and a driving block movably abutted against the inner sliding block are movably arranged in the movable mold cavity block, and the movable mold base is provided with a movable mold cavity. And a die drawing piece for driving the movable die frame to be separated from the movable die seat is arranged on the fixed die assembly. Compared with the prior art, the injection mold has the advantages that the driving block is arranged on the movable mold base, the inner sliding block capable of moving relative to the movable mold cavity block is arranged on the movable mold cavity block, the inner sliding block is movably clamped with the driving block, and the mold drawing piece for driving the movable mold frame to move relative to the movable mold base is arranged on the fixed mold assembly; the movable mold frame is driven to be separated from the movable mold base through the mold pulling piece, so that the driving block can drive the inner sliding block to move in the movable mold cavity block, and the purpose of simplifying an inner pulling structure in the injection mold is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding devices, in particular to an injection mold with an inner extraction structure. Background Art

[0002] Injection molds are key tools in the plastics processing industry. They are used in conjunction with plastic injection molding machines to give plastic products a complete three-dimensional configuration and precise dimensional specifications. Given the variety of plastic materials and processing methods, as well as the fact that the structures of plastic molding machines and the plastic products they produce vary from simple to complex, the design types and structures of injection molds are also diverse.

[0003] like Figure 1 The part shown is also manufactured using the injection mold process. A positioning hole 1 is provided on the part. The axial direction of the positioning hole 1 is arranged perpendicular to the mold parting direction of the mold, and the positioning hole 1 does not penetrate the outer side wall of the part. Therefore, when designing the mold, a set of internal extraction mechanisms must be built inside the mold. The internal extraction structure of traditional injection molds is often more complicated, which not only increases the mold volume, but also increases the overall manufacturing cost of the injection mold. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an injection mold with an inner draw structure in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: to propose an injection mold with an internal drawing structure, comprising: a fixed mold component, on which a drawing mold piece is arranged;

[0006] A movable mold assembly is movably matched with the fixed mold assembly. When the fixed mold assembly and the movable mold assembly are in contact with each other, a product cavity is formed between the fixed mold assembly and the movable mold assembly. The movable mold assembly comprises a movable mold seat, a movable mold frame and a movable mold cavity block. The movable mold frame is movably arranged on the movable mold seat, and the movable mold cavity block is fixed on the movable mold frame. The pulling mold member is movably engaged with the movable mold frame, and is used to drive the movable mold frame away from the movable mold seat when the movable mold assembly is separated from the fixed mold assembly.

[0007] The inner pulling structure comprises a driving block and an inner sliding block, one end of the driving block is fixed on the movable mold seat, and the other end of the driving block is inserted in the movable model cavity block, the inner sliding block is movably arranged in the movable model cavity block and movably abuts against the driving block, and the inner sliding block can move on the movable model cavity block in a direction perpendicular to the fixed mold assembly and pointing to the movable mold assembly under the push of the driving block when the movable mold frame is separated from the movable mold seat, so as to separate the inner sliding block from the product formed in the product cavity.

[0008] In the above-mentioned injection mold with an inner pull-out structure, a plurality of one-to-one corresponding mounting holes are arranged on the movable mold frame and the movable mold base, and a spring is arranged in every two corresponding mounting holes. The spring can be in a compressed state due to the abutment between the movable mold assembly and the fixed mold assembly, and restore to an extended state when the movable mold assembly is separated from the fixed mold assembly.

[0009] In the above-mentioned injection mold with an internal pull-out structure, a cavity insert is arranged in the movable mold cavity block, and the cavity insert is threadedly connected to two guide bars on one side facing the movable mold frame, and a guide channel is formed between the two guide bars. One end of the inner slider is clamped on the cavity insert, and the other end of the inner slider is movably arranged in the guide channel.

[0010] In the above-mentioned injection mold with an inner pull-out structure, a dovetail groove is arranged on the driving block, the dovetail groove is arranged at an angle with the direction of the fixed mold component pointing to the movable mold component, and a convex portion corresponding to the dovetail groove is arranged on the inner sliding block, and the convex portion is movably arranged in the dovetail groove.

[0011] In the above-mentioned injection mold with an internal pulling structure, a plurality of first step holes are arranged on the movable mold frame, and first threaded holes corresponding to the first step holes are arranged on the movable mold base. One end of a first equal height bolt passes through the first step hole and is connected to the first threaded hole, so as to separate the pulling mold part from the movable mold frame.

[0012] In the above-mentioned injection mold with an internal drawing structure, the fixed mold assembly includes a fixed mold base, a fixed mold cavity block, a fixed mold frame and a sliding block, the fixed mold frame is movably arranged on the side of the fixed mold base facing the movable mold assembly, the fixed mold cavity block is fixed on the fixed mold frame and movably abuts against the movable mold cavity block, the drawing mold member is arranged on the fixed mold frame, and the sliding block is movably arranged on the fixed mold frame. The sliding block can move toward the product cavity along a direction perpendicular to the fixed mold assembly pointing to the movable mold assembly due to the abutment between the movable mold frame and the fixed mold frame, and move in a direction away from the product cavity when the movable mold assembly moves in a direction away from the fixed mold assembly.

[0013] In the above-mentioned injection mold with an internal pull-out structure, an oblique push block is provided on the fixed mold seat, and an oblique hole corresponding to the oblique push block is provided on the sliding block. One end of the oblique push block away from the fixed mold seat is movably inserted in the oblique hole to drive the sliding block to move on the fixed mold frame.

[0014] In the above-mentioned injection mold with an internal pull-out structure, a plurality of second step holes are arranged on the fixed mold frame, and second threaded holes corresponding to the second step holes are arranged on the fixed mold base, and one end of the second equal-height bolt passes through the second step hole and is connected in the second threaded hole.

[0015] Compared with the prior art, the advantage of the utility model lies in that a driving block is arranged on the movable mold seat, an inner sliding block which can move relative to the movable mold cavity block is arranged on the movable model cavity block, so that the inner sliding block is movably engaged with the driving block, and a pulling mold part which drives the movable mold frame to move relative to the movable mold seat is arranged on the fixed mold assembly. When the injection mold is opened, the pulling mold part drives the movable mold frame to separate from the movable mold seat, and the driving block can drive the inner sliding block to move in the movable model cavity block, thereby achieving the purpose of simplifying the internal drawing structure in the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional picture of the parts;

[0017] Figure 2 It is a three-dimensional diagram of this scheme;

[0018] Figure 3 It is a three-dimensional diagram of the fixed mold assembly;

[0019] Figure 4 It is a plan view of the fixed mold assembly;

[0020] Figure 5 yes Figure 4 Sectional view along AA direction;

[0021] Figure 6 yes Figure 4 Cross-sectional view along the BB direction;

[0022] Figure 7 It is a three-dimensional diagram of the movable mold assembly;

[0023] Figure 8 It is a plan view of the movable mold assembly;

[0024] Fig. 9 yes Figure 8 Sectional view along CC direction;

[0025] Fig.10 yes Figure 8 Cross-sectional view along the DD direction;

[0026] Fig.11 It is a three-dimensional diagram of the partial structure of the moving mold assembly;

[0027] Fig.12 It is a stereogram of the drive block;

[0028] Fig.13 It is a three-dimensional diagram of the inner slide.

[0029] In the figure, 1, positioning hole; 2, fixed die assembly; 3, drawing die piece; 4, movable die assembly; 5, movable die seat; 6, movable die frame; 7, movable die cavity block; 8, driving block; 9, inner slide block; 10, mounting hole; 11, spring; 12, cavity insert; 13, guide strip; 14, dovetail groove; 15, convex part; 16, first step hole; 17, first threaded hole; 18, first equal height bolt; 19, fixed die seat; 20, fixed die cavity block; 21, fixed die frame; 22, sliding block; 23, oblique push block; 24, oblique hole; 25, second step hole; 26, second threaded hole; 27, second equal height bolt. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figures 1 to 13 As shown, an injection mold with an inner drawing structure of the utility model comprises: a fixed mold assembly 2, on which a drawing mold piece 3 is arranged; a movable mold assembly 4, which is movably matched with the fixed mold assembly 2, and a product cavity is formed between the fixed mold assembly 2 and the movable mold assembly 4 when the fixed mold assembly 2 and the movable mold assembly 4 are abutted, and the movable mold assembly 4 has a movable mold seat 5, a movable mold frame 6 and a movable mold cavity block 7, the movable mold frame 6 is movably arranged on the movable mold seat 5, and the movable mold cavity block 7 is fixed on the movable mold frame 6, and the drawing mold piece 3 is movably connected with the movable mold frame 6, and is used for the movable mold assembly 4 and the fixed mold When the component 2 is separated, the movable mold frame 6 is driven away from the movable mold base 5; the inner pulling structure has a driving block 8 and an inner sliding block 9, one end of the driving block 8 is fixed on the movable mold base 5, and the other end of the driving block 8 is inserted in the movable model cavity block 7, and the inner sliding block 9 is movably arranged in the movable model cavity block 7 and movably abuts against the driving block 8. When the movable mold frame 6 is separated from the movable mold base 5, the inner sliding block 9 can be moved on the movable model cavity block 7 in a direction perpendicular to the fixed mold component 2 and pointing to the movable mold component 4 under the push of the driving block 8, so as to separate the inner sliding block 9 from the product formed in the product cavity.

[0032] During operation, the fixed mold assembly 2 and the movable mold assembly 4 are respectively fixed to the fixed part and the movable part of the plastic molding machine, and the movable mold assembly 4 is driven by the movable part to approach or move away from the fixed mold assembly 2 to complete the opening and closing actions of the injection mold. When the product in the product cavity is initially cooled and the movable part of the plastic molding machine drives the movable mold assembly 4 to move in the direction away from the fixed mold assembly 2, the fixed mold assembly 2 first drives the movable mold frame 6 to separate from the movable mold seat 5 through the pulling mold part 3, so that a relative displacement occurs between the inner slider 9 and the driving block 8. At this time, the driving block 8 drives the inner slider 9 to move on the movable mold cavity block 7 and disengage from the positioning hole 1 on the part, so that the part is freed from the obstruction of the inner slider 9 when ejecting the part, and the movable mold assembly 4 can be ejected normally. When closing the mold, the fixed mold assembly 2 pushes the movable mold frame 6 to move in the direction close to the movable mold seat 5, so that the driving block 8 can pull the inner slider 9 to move in the direction, thereby completing the resetting of the inner slider 9.

[0033] Preferably, the drawing die member 3 is a nylon rubber plug screw.

[0034] Furthermore, a plurality of corresponding mounting holes 10 are provided on the movable mold frame 6 and the movable mold base 5, and a spring 11 is provided in each two corresponding mounting holes 10. The spring 11 can be in a compressed state due to the abutment between the movable mold assembly 4 and the fixed mold assembly 2, and can be restored to an extended state when the movable mold assembly 4 and the fixed mold assembly 2 are separated.

[0035] When the mold is opened, the mounting hole 10 is used to install and fix the spring 11 between the movable mold frame 6 and the movable mold base 5. When the mold is opened, the spring 11 applies a thrust to the movable mold frame 6 and the pulling module to separate the movable mold frame 6 from the movable mold base 5.

[0036] Furthermore, a cavity insert 12 is provided in the movable mold cavity block 7, and two guide bars 13 are threadedly connected to the side of the cavity insert 12 facing the movable mold frame 6, and a guide channel is formed between the two guide bars 13. One end of the inner slider 9 is clamped on the cavity insert 12, and the other end of the inner slider 9 is movably arranged in the guide channel.

[0037] The clamping connection between the inner slider 9 and the cavity insert 12 can be achieved by setting a T-slot on the cavity block, setting a T-shaped portion on the inner slider 9, and inserting the T-shaped portion into the T-slot. The guide channel is used to guide the movement of the inner slider 9 when the inner slider 9 moves on the cavity block 7.

[0038] Furthermore, a dovetail groove 14 is provided on the driving block 8, and the dovetail groove 14 is arranged at an angle with the direction of the fixed mold assembly 2 pointing to the movable mold assembly 4. A convex portion 15 corresponding to the dovetail groove 14 is provided on the inner sliding block 9, and the convex portion 15 is movably arranged in the dovetail groove 14. The setting of the dovetail groove 14 and the convex portion 15 is used to enable the inner sliding block 9 to move in a direction perpendicular to the fixed mold assembly 2 pointing to the movable mold assembly 4 when the driving block 8 and the inner sliding block 9 are relatively displaced.

[0039] Furthermore, a plurality of first step holes 16 are provided on the movable mold frame 6, and a first threaded hole 17 corresponding to the first step holes 16 is provided on the movable mold base 5. One end of a first equal height bolt 18 passes through the first step hole 16 and is connected to the first threaded hole 17, so as to separate the drawing mold part 3 from the movable mold frame 6.

[0040] When the drawing die member 3 drives the movable die frame 6 to move in the direction away from the movable die seat 5, the first step hole 16 moves relative to the first equal height bolt 18. When the movable die frame 6 moves to the specified position, the first equal height bolt 18 presses against the bottom wall of the first step hole 16 to separate the drawing die member 3 from the movable die frame 6, thereby achieving a limiting effect on the movement of the movable die frame 6.

[0041] Furthermore, the fixed mold assembly 2 includes a fixed mold base 19, a fixed mold cavity block 20, a fixed mold frame 21 and a sliding block 22. The fixed mold frame 21 is movably arranged on the side of the fixed mold base 19 facing the movable mold assembly 4. The fixed mold cavity block 20 is fixed on the fixed mold frame 21 and movably abuts against the movable mold cavity block 7. The drawing mold member 3 is arranged on the fixed mold frame 21, and the sliding block 22 is movably arranged on the fixed mold frame 21. The sliding block 22 can move toward the product cavity in a direction perpendicular to the fixed mold assembly 2 pointing to the movable mold assembly 4 due to the abutment of the movable mold frame 6 and the fixed mold frame 21, and move in a direction away from the product cavity when the movable mold assembly 4 moves in a direction away from the fixed mold assembly 2. The end of the sliding block 22 has a profiling portion that forms a side wall structure of the product cavity. The sliding block 22 is driven to move on the fixed mold cavity block 20 by separating the fixed mold frame 21 from the fixed mold base 19, which is used to simplify the structure of the driving member of the sliding block 22, thereby achieving the purpose of reducing the volume of the injection mold.

[0042] Furthermore, an oblique push block 23 is provided on the fixed mold base 19, and an oblique hole 24 corresponding to the oblique push block 23 is provided on the sliding block 22. One end of the oblique push block 23 away from the fixed mold base 19 is movably inserted in the oblique hole 24 to drive the sliding block 22 to move on the fixed mold frame 21.

[0043] Furthermore, the fixed mold frame 21 is provided with a plurality of second step holes 25 , the fixed mold seat 19 is provided with second threaded holes 26 corresponding to the second step holes 25 , and one end of the second height bolt 27 passes through the second step hole 25 and is connected to the second threaded hole 26 .

[0044] While the drawing die member 3 drives the movable die frame 6 to move in the direction away from the movable die seat 5, driven by the movable die frame 6, the fixed die frame 21 moves in the direction away from the fixed die seat 19. When the fixed die frame 21 moves, the second step hole 25 moves relative to the second equal-height bolt 27. When the fixed die frame 21 moves to the specified position, the second equal-height bolt 27 presses against the bottom wall of the second step hole 25 to separate the drawing die member 3 from the movable die frame 6, thereby achieving a limiting effect on the movement of the fixed die frame 21.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. An injection mold with an internal draw structure, characterized in that: include: A fixed die assembly, on which a drawing die piece is arranged; A movable mold assembly is movably matched with the fixed mold assembly. When the fixed mold assembly and the movable mold assembly are in contact with each other, a product cavity is formed between the fixed mold assembly and the movable mold assembly. The movable mold assembly comprises a movable mold seat, a movable mold frame and a movable mold cavity block. The movable mold frame is movably arranged on the movable mold seat, and the movable mold cavity block is fixed on the movable mold frame. The pulling mold member is movably engaged with the movable mold frame, and is used to drive the movable mold frame away from the movable mold seat when the movable mold assembly is separated from the fixed mold assembly. The inner pulling structure comprises a driving block and an inner sliding block, one end of the driving block is fixed on the movable mold seat, and the other end of the driving block is inserted in the movable model cavity block, the inner sliding block is movably arranged in the movable model cavity block and movably abuts against the driving block, and the inner sliding block can move on the movable model cavity block in a direction perpendicular to the fixed mold assembly and pointing to the movable mold assembly under the push of the driving block when the movable mold frame is separated from the movable mold seat, so as to separate the inner sliding block from the product formed in the product cavity.

2. An injection mold with an inner drawer structure as claimed in claim 1, characterized in that: The movable mold frame and the movable mold base are both provided with a plurality of corresponding mounting holes, and a spring is provided in each two corresponding mounting holes. The spring can be in a compressed state due to the abutment between the movable mold assembly and the fixed mold assembly, and can be restored to an extended state when the movable mold assembly is separated from the fixed mold assembly.

3. The injection mold with an inner drawer structure according to claim 1, characterized in that: A cavity insert is arranged in the movable mold cavity block, and the cavity insert is threadedly connected to two guide bars on one side facing the movable mold frame, and a guide channel is formed between the two guide bars. One end of the inner slider is clamped on the cavity insert, and the other end of the inner slider is movably arranged in the guide channel.

4. The injection mold with an inner drawer structure according to claim 1, characterized in that: The driving block is provided with a dovetail groove, the dovetail groove is arranged at an angle with the direction in which the fixed mold assembly points to the movable mold assembly, and the inner sliding block is provided with a convex portion corresponding to the dovetail groove, and the convex portion is movably arranged in the dovetail groove.

5. The injection mold with an inner drawer structure according to claim 1, characterized in that: The movable mold frame is provided with a plurality of first step holes, the movable mold base is provided with first threaded holes corresponding to the first step holes one by one, one end of a first equal height bolt passes through the first step hole and is connected in the first threaded hole, so as to separate the drawing mold part from the movable mold frame.

6. The injection mold with an inner draw structure according to claim 1, characterized in that: The fixed mold assembly includes a fixed mold base, a fixed mold cavity block, a fixed mold frame and a sliding block. The fixed mold frame is movably arranged on the side of the fixed mold base facing the movable mold assembly. The fixed mold cavity block is fixed on the fixed mold frame and movably abuts against the movable mold cavity block. The drawing mold member is arranged on the fixed mold frame. The sliding block is movably arranged on the fixed mold frame. The sliding block can move toward the product cavity along a direction perpendicular to the fixed mold assembly pointing to the movable mold assembly due to the abutment between the movable mold frame and the fixed mold frame, and move in a direction away from the product cavity when the movable mold assembly moves in a direction away from the fixed mold assembly.

7. The injection mold with an inner drawer structure according to claim 6, characterized in that: The fixed mold seat is provided with an oblique push block, and the sliding block is provided with an oblique hole corresponding to the oblique push block. One end of the oblique push block away from the fixed mold seat is movably inserted in the oblique hole to drive the sliding block to move on the fixed mold frame.

8. The injection mold with an inner drawer structure according to claim 6, characterized in that: The fixed mold frame is provided with a plurality of second step holes, the fixed mold seat is provided with second threaded holes corresponding to the second step holes one by one, and one end of the second equal height bolt passes through the second step hole and is connected in the second threaded hole.

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