Secondary ejection core-pulling type injection mold

Abstract

The utility model relates to the field of injection molding, in particular to a secondary ejection core-pulling type injection mold. In the secondary ejection process, due to the fact that the force exerted by the ejector pin on the product is not uniform when the ejector pin ejects the product, defective products can be generated due to insufficient demolding in the demolding process of the product. Comprising a fixing block, a supporting mechanism is arranged on the lower side of the fixing block and comprises two supporting shells, the two supporting shells are symmetrically and fixedly connected to the lower side of the fixing block, a lower supporting plate is slidably connected to the inner sides of the supporting shells, a supporting rod is fixedly connected to the upper side of the lower supporting plate, and an ejection shell is fixedly connected to the upper end of the supporting rod; the outer side of the ejection shell is slidably connected with the fixing block, and a forming mechanism is arranged in the ejection shell. The side hydraulic shaft is controlled to drive the upper supporting plate on the upper side to move upwards and drive the stirring column to extrude the sliding block at the same time, the core pulling process is achieved, limitation on a mold can be rapidly relieved, and therefore the demolding process is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding field especially relates to a secondary ejection core -pulling type injection mold. BACKGROUND

[0002] Core -pulling type injection mold is a special type in injection mold, mainly used for processing the part that cannot directly demould on product parting surface, such as side hole, groove structure, core -pulling type injection mold passes through specific core -pulling mechanism, and the core in the mold is extracted to ensure that the product can be demoulded smoothly, and secondary ejection is that product is ejected from the mold after product forming, and the demoulding of product is realized.

[0003] In the secondary ejection process, the force of ejector pin is uneven when ejecting the product, so that the product may not be fully demoulded during demoulding, resulting in defective products, thereby affecting the quality of product and the time required in the injection molding process, and the production efficiency is reduced. UTILITY MODEL CONTENTS

[0004] (1) technical problem to be solved

[0005] The utility model discloses to overcome the shortcoming that the force of ejector pin is uneven when ejecting the product in the secondary ejection process, so that the product may not be fully demoulded during demoulding, resulting in defective products, and the technical problem to be solved by the utility model is that secondary ejection is not fully demoulded.

[0006] (2) technical scheme

[0007] In order to solve the above technical problem, the utility model provides a kind of core -pulling type injection mold of secondary ejection, including fixed block, the support mechanism is arranged in the lower side of the fixed block, the support mechanism includes two support shells, two The support shell is fixedly connected on the lower side of the fixed block, the lower side of the support shell is slidably connected with lower support plate, the upper side of the lower support plate is fixedly connected with support rod, the upper end of the support rod is fixedly connected with ejector shell, the ejector shell is slidably connected with the fixed block outside, the ejector shell is provided with forming mechanism inside, the forming mechanism includes two support blocks, the support block is slidably connected on the end face of the ejector shell, the lower end of the support block is fixedly connected with the fixed block, the other end of the support block is fixedly connected with lower forming mould, the lower side of the injection workpiece is abutted with the ejector shell outside the lower forming mould face slidably connected with.

[0008] Preferably, the upper support plate is slidably connected to the inside of the support shell and located on the upper side of the lower support plate, a plurality of support columns are fixedly connected to the upper side of the upper support plate, the support columns are distributed in a triangular shape on the upper side of the upper support plate, a moving block is fixedly connected to the upper end of the support column, an upper forming die is slidably connected to the inside of the moving block, two sliders are symmetrically arranged on the upper end of the upper forming die, a sliding groove is arranged at the position of the sliders of the upper forming die, and the upper forming die is slidably connected to the inside of the injection molding workpiece.

[0009] Preferably, a push column is fixedly connected to the upper side of the upper support plate and slidably connected to the inside of the fixed block, and a plurality of support springs are fixedly connected to the upper side of the upper support plate and fixedly connected to the upper end of the fixed block.

[0010] Preferably, the lower side of the support shell is provided with a driving mechanism, the driving mechanism comprises a protection shell, the upper side of the protection shell is fixedly connected to the support shell, a plurality of guide rods are fixedly connected to the upper side of the protection shell, and the outer sides of the guide rods are slidably connected to the upper support plate, the lower support plate, the moving block and the fixed block.

[0011] Preferably, a through hole is arranged in the side surface of the upper forming die, a sliding block is slidably connected to the through hole of the upper forming die, the sliding block is slidably connected to the fixed block, a through hole is arranged in the middle of the sliding block, the side wall of the through hole of the sliding block is in abutment with the upper side of the push column, two reset springs are symmetrically fixedly connected to the side surface of the sliding block, and the other ends of the reset springs are fixedly connected to the fixed block.

[0012] Preferably, an injection plate is fixedly connected to the upper side of the moving block, an injection port is arranged in the middle of the injection plate, a through hole is arranged in the injection port of the injection plate, and the through hole of the moving block is in communication with the injection port of the injection plate.

[0013] Preferably, a main hydraulic shaft is fixedly connected to the lower side of the lower support plate, two side hydraulic shafts are symmetrically fixedly connected to the lower side of the upper support plate, and the outer side surfaces of the side hydraulic shafts are slidably connected to the lower support plate.

[0014] (3) Beneficial effects

[0015] 1. By controlling the side hydraulic shaft to drive the upper support plate on the upper side to move upward while driving the push column to extrude the sliding block, the core pulling process is realized, the restriction on the mold can be quickly released, the demolding process is accelerated, and the overall efficiency is improved.

[0016] 2, by the upper support plate to push the support column and drive the moving block and injection plate upward movement, drive the upper forming die upward movement, realize injection molding workpiece separation, at the same time through the main hydraulic shaft drive lower support plate upward movement, thereby drive the ejection shell to injection molding workpiece push, realize the secondary ejection of injection molding workpiece, this process can more fully, efficient workpiece demolding process, speed up the production process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 for the overall structure of the present application Figure Two

[0018] Figure 2 for the moving block profile of the present application Figure Two

[0019] Figure 3 for the structure of the upper forming die of the present application Figure Two

[0020] Figure 4 for the fixed block profile of the present application Figure Two

[0021] Figure 5 for the structure of the lower forming die of the present application Figure Two

[0022] Figure 6 for the structure of the push column of the present application.

[0023] The marks in the drawings are: 1-injection plate, 2-moving block, 3-fixed block, 4-supporting mechanism, 401-supporting shell, 402-lower support plate, 403-upper support plate, 404-guide rod, 405-supporting column, 406-push column, 407-supporting rod, 408-supporting spring, 409-ejection shell, 5-forming mechanism, 501-upper forming die, 502-lower forming die, 503-injection molding workpiece, 504-supporting block, 505-sliding block, 506-reset spring, 6-driving mechanism, 601-side hydraulic shaft, 602-main hydraulic shaft, 603-protection shell. DETAILED DESCRIPTION

[0024] The present application will be further described below in conjunction with the drawings and examples.

[0025] Example 1

[0026] A secondary ejection core-pulling type injection mold, such as Figure 1 , Figure 4As shown, including the fixed block 3, the lower side of the fixed block 3 is provided with a support mechanism 4, the support mechanism 4 includes two support shells 401, the two support shells 401 are symmetrically fixedly connected to the lower side of the fixed block 3, the inner side of the support shell 401 is slidably connected with a lower support plate 402, the upper side of the lower support plate 402 is fixedly connected with a support rod 407, the upper end of the support rod 407 is fixedly connected with an ejection shell 409, the lower end of the ejection shell 409 is a circular plate and the side surface is symmetrically provided with a through hole, the upper end of the ejection shell 409 is a circular ring, the circular ring at the upper end of the ejection shell 409 matches the bottom surface of the injection molding workpiece 503, so that it can fully act on the lower side of the injection molding workpiece 503, and fully demolding is achieved, the outer side of the ejection shell 409 is slidably connected with the fixed block 3, and the inside of the ejection shell 409 is provided with a forming mechanism 5, the forming mechanism 5 includes two support blocks 504, the support blocks 504 are symmetrically slidably connected to the end face of the ejection shell 409, the lower end of the support block 504 is fixedly connected with the fixed block 3, and the other end of the support block 504 is fixedly connected with a lower forming die 502, the outer side of the lower forming die 502 is slidably connected with the injection molding workpiece 503, and the lower side of the injection molding workpiece 503 abuts against the upper side of the ejection shell 409 after the injection molding is completed.

[0027] As shown in Figure 2 , Figure 3 , the inner side of the support shell 401 and located on the upper side of the lower support plate 402 is slidably connected with an upper support plate 403, the upper side of the upper support plate 403 is fixedly connected with a plurality of support columns 405, the support columns 405 are distributed in a triangular shape on the upper side of the upper support plate 403, the upper end of the support column 405 is fixedly connected with a moving block 2, the support column 405 is slidably connected with the fixed block 3, the inside of the moving block 2 is slidably connected with an upper forming die 501, the bottom of the upper forming die 501 abuts against the fixed block 3 and cooperates with the lower forming die 502 to form a workpiece cavity, two sliders are symmetrically arranged on the upper end of the upper forming die 501, a sliding groove is arranged at the slider position of the moving block 2, the upper forming die 501 is slidably connected with the moving block 2 through the sliders, the sliding groove at the bottom of the moving block 2 supports the upper forming die 501, which can drive the upper forming die 501 to move cooperatively with the moving block 2, and the inner side of the upper forming die 501 is slidably connected with the injection molding workpiece 503.

[0028] As shown in Figure 4 , the upper side of the upper support plate 403 is fixedly connected with a push column 406, the push column 406 is slidably connected in the inside of the fixed block 3, the upper side of the upper support plate 403 is fixedly connected with a plurality of support springs 408, and the upper end of the support spring 408 is fixedly connected with the fixed block 3.

[0029] The lower side of the support shell 401 is provided with a driving mechanism 6, the driving mechanism 6 includes a protection shell 603, the upper side of the protection shell 603 is fixedly connected with the support shell 401, a plurality of guide rods 404 are fixedly connected to the upper side of the protection shell 603, and the outer sides of the guide rods 404 are slidably connected with the upper support plate 403, the lower support plate 402, the moving block 2 and the fixed block 3.

[0030] As Figure 6 shown, the side of the upper forming die 501 is provided with a through hole, the through hole of the upper forming die 501 is slidably connected with a sliding block 505, the sliding block 505 is slidably connected with the fixed block 3, the sliding block 505 is in the shape of a Chinese character "K", a cylinder is fixedly connected to the left side of the sliding block 505, the sliding block 505 is slidably connected with the fixed block 3 through the cylinder, a rectangular through hole is formed in the middle of the sliding block 505, the upper side of the actuating column 406 is a smooth inclined surface, the side wall of the through hole of the sliding block 505 is in abutment with the inclined surface of the upper side of the lower actuating column 406, two return springs 506 are symmetrically fixedly connected to the side of the sliding block 505, and the other end of each return spring 506 is fixedly connected with the fixed block 3.

[0031] The upper side of the moving block 2 is fixedly connected with an injection molding plate 1, a injection molding port is formed in the middle of the injection molding plate 1, and a through hole is formed in the injection molding port of the injection molding plate 1 opposite the moving block 2, and the through hole of the moving block 2 is in communication with the injection molding port of the injection molding plate 1.

[0032] As Figure 2 , Figure 4 shown, the lower side of the lower support plate 402 is fixedly connected with a main hydraulic shaft 602, and the lower side of the upper support plate 403 is symmetrically fixedly connected with two side hydraulic shafts 601, the outer side of each side hydraulic shaft 601 is slidably connected with the lower support plate 402, and the bottom of the main hydraulic shaft 602 and the side hydraulic shafts 601 is fixedly connected with the inside of the protective shell 603.

[0033] The injection molding port in the injection molding plate 1 is used to inject the inside of the upper forming die 501, and after the injection molding work is completed, the injection molding workpiece 503 needs to be pushed out, at this time, the hydraulic switch is started to control the side hydraulic shafts 601 on both sides, at this time, the side hydraulic shafts 601 drive the upper support plate 403 to move upward, and the upper support plate 403 pushes the actuating column 406 upward, at this time, the upper side of the actuating column 406 cooperates with the middle through hole of the sliding block 505 to drive the sliding block 505 to move away from the upper forming die 501, and at the same time, the sliding block 505 extrudes the return spring 506 at the end, so that the core pulling of the mold is realized.

[0034] At the same time, the upper support plate 403 pushes the support column 405 upward and drives the moving block 2 and the injection molding plate 1 to move upward, the moving block 2 drives the upper forming die 501 to move upward when the moving block 2 moves upward, so that the upper half mold of the injection molding workpiece 503 is separated.

[0035] After the upper half of the injection molding workpiece 503 is separated from the mold, the main hydraulic shaft 602 is controlled to move upward by a hydraulic switch, at this time, the main hydraulic shaft 602 drives the lower support plate 402 to move upward, and at the same time, the support rod 407 on the upper side of the lower support plate 402 is pushed to move upward, thereby driving the ejection shell 409 to move upward along the support block 504 and pushing the upper injection molding workpiece 503 to move away from the lower forming mold 502, thereby realizing the demolding of the lower half of the injection molding workpiece 503, and completing the secondary ejection.

[0036] After the injection molding workpiece 503 is taken out, the main hydraulic shaft 602 is reversely controlled, at this time, the main hydraulic shaft 602 moves downward and drives the support rod 407 to move in the same direction through the lower support plate 402, thereby driving the ejection shell 409 to move downward along the support block 504, and realizing the resetting of the ejection shell 409 to the position before the secondary ejection.

[0037] After the resetting of the ejection shell 409 is completed, the side hydraulic shaft 601 is reversely controlled to move downward, thereby driving the support column 405 to move downward through the lower support plate 402, at this time, the upper forming mold 501 in the moving block 2 will first contact the fixed block 3, after the upper forming mold 501 contacts the fixed block 3, the upper side of the driving column 406 is disengaged from the through hole of the sliding block 505, and the sliding block 505 is reset under the action of the reset spring 506.

[0038] The above-described embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but should not be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, improvements and substitutions can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A two-stage ejection core-pulling injection mold characterized by, The utility model relates to a injection molding machine, including fixed block (3), the lower side of fixed block (3) is provided with support mechanism (4), support mechanism (4) includes two support shell (401), two support shell (401) are fixedly connected on the lower side of fixed block (3) symmetry, the inside slide of support shell (401) is connected with lower support plate (402), the upper side fixed connection of lower support plate (402) has support rod (407), the upper end fixed connection of support rod (407) has ejection shell (409), the outside slide of ejection shell (409) is connected with fixed block (3), the inside of ejection shell (409) is provided with forming mechanism (5), forming mechanism (5) includes two support block (504), the end face of ejection shell (409) is connected with support block (504) symmetry slide, the lower end of support block (504) is fixedly connected with fixed block (3), the other end of support block (504) is fixedly connected with lower forming die (502), the outside slide of lower forming die (502) has injection molding work piece (503), the lower side of injection molding work piece (503) is opposite with ejection shell (409).

2. A secondary-ejection core-pulling injection mold according to claim 1, characterized in that, The inside slide of support shell (401) and be located on the upper side of lower support plate (402) has upper support plate (403), the upper side fixed connection of upper support plate (403) has a plurality of support column (405), support column (405) is distributed on the upper side of upper support plate (403) triangle, the upper end fixed connection of support column (405) has moving block (2), the inside slide of moving block (2) has upper forming die (501), the upper end both sides of upper forming die (501) are provided with two sliders symmetry, the sliding groove of moving block (2) is located in the slider position of upper forming die (501) and is set up, the inside slide of upper forming die (501) has injection molding work piece (503).

3. A secondary-ejection core-pulling injection mold according to claim 2, characterized in that The upper side fixed connection of upper support plate (403) has knob column (406), knob column (406) slide in the inside of fixed block (3), the upper side fixed connection of upper support plate (403) has a plurality of support spring (408), the upper end of support spring (408) is fixedly connected with fixed block (3).

4. A secondary-ejection core-pulling injection mold according to claim 3, characterized in that The lower side of support shell (401) is provided with driving mechanism (6), driving mechanism (6) includes protection shell (603), the upper side of protection shell (603) is fixedly connected with support shell (401), the upper side of protection shell (603) is fixedly connected with a plurality of guide rod (404), the outside slide of guide rod (404) has upper support plate (403), lower support plate (402), moving block (2), fixed block (3).

5. A secondary-ejection core-pulling injection mold according to claim 4, characterized in that The side of the upper forming die (501) is provided with a through hole, the sliding block (505) is slidably connected in the through hole of the upper forming die (501), the sliding block (505) is slidably connected with the fixed block (3), the middle part of the sliding block (505) is provided with a through hole, the side wall of the through hole of the sliding block (505) is in abutment with the upper side of the pushing column (406), the side of the sliding block (505) is fixedly connected with two reset springs (506) in a symmetrical manner, and the other end of the reset spring (506) is fixedly connected with the fixed block (3).

6. A secondary-ejection core-pulling injection mold according to claim 5, characterized in that The upper side of the moving block (2) is fixedly connected with an injection molding plate (1), the middle part of the injection molding plate (1) is provided with an injection molding port, the moving block (2) is provided with a through hole at a position opposite to the injection molding port of the injection molding plate (1), and the through hole of the moving block (2) is in communication with the injection molding port of the injection molding plate (1).

7. A secondary-ejection core-pulling injection mold according to claim 6, characterized in that The lower side of the lower supporting plate (402) is fixedly connected with a main hydraulic shaft (602), the lower side of the upper supporting plate (403) is fixedly connected with two side hydraulic shafts (601) in a symmetrical manner, the outer side of the side hydraulic shaft (601) is slidably connected with the lower supporting plate (402), and the bottom of the main hydraulic shaft (602) and the side hydraulic shaft (601) is fixedly connected with the inside of the protection shell (603).

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