Vertical rotary core-pulling mold for injection molding of 90-degree drainage elbow pipe fitting

Abstract

The utility model provides a vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, and belongs to the technical field of molds. The die comprises an upper die plate and a lower die plate, two vertically-arranged forming cavities are symmetrically arranged between the upper die plate and the lower die plate, a static die base and a movable die base are arranged on the lower die plate, and a first pipe orifice core block vertically inserted into the forming cavities is arranged on the upper die plate. After the forming cavity is changed into the vertical type from the horizontal type, the first pipe orifice core block does not need to be provided with a core pulling structure, only the first pipe orifice core block needs to be fixed to the upper mold plate, and core pulling of the first pipe orifice core block can be achieved while mold opening is conducted on the upper mold plate; when the vertical rotary core-pulling mechanism drives the inner core block in the arc-shaped pipe to rotate for core pulling, the moving area of the movable template and the moving area of the inner core block in the arc-shaped pipe are also changed, and more requirements for the space in the vertical direction are met, so that the occupied space in the horizontal direction is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and relates to an injection molding vertical rotary core-pulling mold for a 90-degree drainage elbow pipe fitting. Background Technique

[0002] The 90-degree plastic drainage elbow pipe fitting is generally injection molded. In the prior art, the plastic drainage elbow pipe fitting is mostly horizontally arranged. For the core-pulling of the arc-shaped pipe inner core block in the drainage elbow pipe fitting of the horizontally arranged mold, an arc-shaped core-pulling structure needs to be set, but the arc-shaped core-pulling structure of the horizontal mold occupies a large space in the horizontal direction.

[0003] For example, the Chinese patent discloses a 90° arc-shaped elbow plastic mold [Application No.: 200910095917.3]. The arc-shaped elbow includes an arc-shaped main body, and flared openings are respectively made at both ends of the arc-shaped main body. Its processing mold includes a cavity and a core. The cavity and the core form the mold cavity of the arc-shaped elbow. The cavity is composed of an upper piece cavity and a lower piece cavity that are split. The upper piece cavity is driven by a mold opening and closing mechanism. The core is characterized in that it includes a flared core A, an arc-shaped main body core, and a flared core B that are connected in sequence. The flared core A is driven by a core-pulling mechanism A, the flared core B is driven by a core-pulling mechanism B, a pull rod is made at one end of the arc-shaped main body core, the pull rod passes through the flared core B, the head of the pull rod is connected to a swing plate, a connecting ear is made on one side of the swing plate, the connecting ear is connected to a rotating shaft, a gear is installed at the lower part of the rotating shaft, the gear meshes with a rack, and the rack is driven by an oil cylinder. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and provide an injection molding vertical rotary core-pulling mold for a 90-degree drainage elbow pipe fitting.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection molding vertical rotary core-pulling mold for a 90-degree drainage elbow pipe fitting includes an upper template and a lower template. Two vertically arranged molding cavities are symmetrically arranged between the upper template and the lower template. A static mold base and a moving mold base are arranged on the lower template. A first pipe orifice core block vertically inserted into the molding cavity is arranged on the upper template. A second pipe orifice core block horizontally inserted into the molding cavity is arranged on the moving mold base. A horizontal core-pulling assembly connected to the second pipe orifice core block is further arranged between the upper template and the moving mold base. An arc-shaped pipe inner core block connected to the moving mold base is arranged in the molding cavity. A vertical rotary core-pulling mechanism connected to the moving mold base is further arranged on the lower template.

[0007] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, a core block fixing plate is arranged on the front side of the moving mold base. A connecting rod is horizontally fixed on the arc-shaped pipe inner core block. The connecting rod horizontally penetrates through the second pipe orifice core block and is connected to the core block fixing plate. The second pipe orifice core block and the connecting rod are slidably connected.

[0008] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the vertical rotary core-pulling mechanism includes two side baffles vertically arranged at the top of the lower template and respectively arranged on both sides of the moving mold base and the static mold base. A rotary cavity is arranged inside the side baffle. Rotary plates inserted into the rotary cavity are arranged on both sides of the moving mold base. The rotary plates are rotatably connected to the side baffle through rotary shafts. The vertical rotary core-pulling mechanism further includes a rotary assembly capable of driving the rotary plates to rotate.

[0009] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the rotary assembly includes a rotary gear fixed on the rotary shaft. A driving rack meshing with the rotary gear and vertically arranged is further arranged inside the rotary cavity. A lifting driver is fixedly connected to the outside of the lower template. The end of the output shaft of the lifting driver is connected to the driving rack.

[0010] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, a core-pulling seat connected to the second pipe orifice core block is slidably arranged on the moving mold base. The core-pulling seat also slidably cooperates with the connecting rod.

[0011] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the horizontal core-pulling assembly includes a driving rod obliquely fixed to the bottom of the upper template. The driving rod is inserted into the core-pulling seat and slidably cooperates with the core-pulling seat.

[0012] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, a core-pulling seat limiting structure is further arranged on the moving mold base.

[0013] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the core-pulling seat limiting structure includes limiting pressing plates arranged on both sides of the core-pulling seat. The inner side wall bottom of the limiting pressing plate is recessed inward to form a limiting groove. Limiting blocks protruding from both sides of the core-pulling seat and inserted into the limiting groove are arranged.

[0014] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the limiting pressing plates are detachably fixed to the moving mold base through a plurality of bolts.

[0015] In the above-mentioned vertical rotary core-pulling mold for injection molding of a 90-degree drainage elbow pipe fitting, the core block fixing plate is detachably fixed to the moving mold base through a plurality of bolts.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. After changing the molding cavity from horizontal to vertical, there is no need to set a core-pulling structure for the core block of the first pipe orifice. The core block of the first pipe orifice only needs to be fixed on the upper template, and the core-pulling of the core block of the first pipe orifice can be achieved while the upper template is being opened. Secondly, after changing the molding cavity from horizontal to vertical, when the vertical rotary core-pulling mechanism drives the core block in the arc-shaped pipe to rotate and pull out the core, the moving areas of the moving template and the core block in the arc-shaped pipe also change, and more is the requirement for the space in the vertical direction, greatly reducing the space occupied in the horizontal direction.

[0018] 2. The lifting driver can drive the driving rack to move up and down in the vertical direction. The driving rack moving up and down in the vertical direction can drive the rotating gear to rotate. The rotating gear rotating can drive the rotating plate to rotate through the rotating shaft. The rotating plate rotating can drive the moving die base to turn upward with the rotating shaft as the center. The moving die base turning can drive the core block in the arc-shaped pipe to rotate through the core block fixing plate and the connecting rod, so that the core block in the arc-shaped pipe can be separated from the product.

[0019] 3. Before the core block in the arc-shaped pipe is pulled out of the core, first drive the upper template to move upward to open the mold. The upper template moving upward can drive the second pipe orifice core block to automatically pull out the core through the horizontal core-pulling component. The upper template moving upward can drive the driving rod to move vertically upward. The driving rod arranged obliquely moving vertically upward can drive the core-pulling seat to move horizontally away from the molding cavity, so as to drive the second pipe orifice core block to translate and pull out the core.

[0020] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0022] Figure 2 is a sectional view of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the lower template;

[0024] Figure 4 is a partial schematic diagram of the structure of the lower template.

[0025] In the figure: upper template 1, lower template 2, molding cavity 3, static die base 4, moving die base 5, core block of the first pipe orifice 6, core block of the second pipe orifice 7, core block in the arc-shaped pipe 8, vertical rotary core-pulling mechanism 9, core block fixing plate 10, connecting rod 11, side baffle 12, rotating plate 13, rotating shaft 14, rotating gear 15, driving rack 16, lifting driver 17, core-pulling seat 18, driving rod 19, limiting pressing plate 20, limiting groove 21. Detailed implementation mode

[0026] As Figures 1 - 4 shown, an injection molding vertical rotary core-pulling mold for a 90-degree drainage elbow pipe fitting includes an upper template 1 and a lower template 2. Two vertically arranged molding cavities 3 are symmetrically arranged between the upper template 1 and the lower template 2. A static mold base 4 and a moving mold base 5 are arranged on the lower template 2. A first pipe orifice core block 6 vertically inserted into the molding cavity 3 is arranged on the upper template 1. A second pipe orifice core block 7 horizontally inserted into the molding cavity 3 is arranged on the moving mold base 5. A horizontal core-pulling assembly connected to the second pipe orifice core block 7 is further arranged between the upper template 1 and the moving mold base 5. An arc-shaped pipe inner core block 8 connected to the moving mold base 5 is arranged in the molding cavity 3. A vertical rotary core-pulling mechanism 9 connected to the moving mold base 5 is further arranged on the lower template 2.

[0027] In the present utility model, after changing the molding cavity from horizontal to vertical, the first pipe orifice core block 6 does not need to be provided with a core-pulling structure. Only by fixing the first pipe orifice core block 6 on the upper template, the core-pulling of the first pipe orifice core block can be realized while the upper template is opened. Secondly, after changing the molding cavity from horizontal to vertical, when the vertical rotary core-pulling mechanism 9 drives the arc-shaped pipe inner core block 8 to rotate and pull out the core, the moving areas of the moving template and the arc-shaped pipe inner core block 8 also change, and more is the requirement for the space in the vertical direction, and the space occupied in the horizontal direction is greatly reduced;

[0028] Before the arc-shaped pipe inner core block 8 pulls out the core, first drive the upper template to move upward to open the mold. The upward movement of the upper template can drive the second pipe orifice core block 7 to automatically pull out the core through the horizontal core-pulling assembly.

[0029] Specifically, a core block fixing plate 10 is arranged on the front side of the moving mold base 5. A connecting rod 11 is horizontally fixed on the arc-shaped pipe inner core block 8. The connecting rod 11 horizontally penetrates through the second pipe orifice core block 7 and is connected to the core block fixing plate 10. The second pipe orifice core block 7 and the connecting rod 11 are slidably connected. The arc-shaped pipe inner core block 8 is connected to the moving mold base through the connecting rod and the core block fixing plate. Therefore, when the vertical rotary core-pulling mechanism 9 drives the moving mold base 5 to rotate, the arc-shaped pipe inner core block 8 can be driven to rotate and pull out the core.

[0030] Specifically, the vertical rotary core-pulling mechanism 9 includes two side baffles 12 vertically arranged at the top of the lower template 2 and respectively arranged on both sides of the moving mold base 5 and the static mold base 4. A rotary cavity is arranged inside the side baffle 12. Rotary plates 13 inserted into the rotary cavity are arranged on both sides of the moving mold base 5. The rotary plates 13 are rotationally connected to the side baffles 12 through rotary shafts 14. The vertical rotary core-pulling mechanism 9 further includes a rotary assembly capable of driving the rotary plates 13 to rotate. The rotary assembly includes a rotary gear 15 fixed on the rotary shaft 14. A driving rack 16 meshing with the rotary gear 15 and vertically arranged is further arranged inside the rotary cavity. A lifting driver 17 is fixedly connected to the outside of the lower template 2. The end of the output shaft of the lifting driver 17 is connected to the driving rack 16. The lifting driver 17 can drive the driving rack to lift in the vertical direction. The driving rack lifting in the vertical direction can drive the rotary gear to rotate. The rotary gear rotation can drive the rotary plates 13 to rotate through the rotary shafts. The rotary plate rotation can drive the moving mold base to turn upward around the rotary shaft. The moving mold base rotation can drive the core block inside the arc-shaped tube 8 to rotate through the core block fixing plate and the connecting rod, so that the core block 8 inside the arc-shaped tube can be separated from the product.

[0031] Those skilled in the art should understand that the lifting driver can be an oil cylinder, a cylinder or a linear motor, etc.

[0032] Specifically, a core-pulling seat 18 connected to the core block 7 at the second pipe orifice is slidably arranged on the moving mold base 5. The core-pulling seat 18 also slidably cooperates with the connecting rod 11. The horizontal core-pulling assembly includes a driving rod 19 obliquely fixed to the bottom of the upper template 1. The driving rod 19 is inserted into the core-pulling seat 18 and slidably cooperates with the core-pulling seat 18. When the mold is opened, the upward movement of the upper template can drive the driving rod to move vertically upward. The vertically upward movement of the obliquely arranged driving rod can drive the core-pulling seat to move horizontally away from the forming cavity, so as to drive the core block 7 at the second pipe orifice to perform translational core-pulling.

[0033] Preferably, a core-pulling seat limiting structure is further arranged on the moving mold base 5. The core-pulling seat limiting structure includes limiting pressing plates 20 arranged on both sides of the core-pulling seat 18. A limiting groove 21 is recessed inward at the bottom of the inner side wall of the limiting pressing plate 20. Limiting blocks protruding from both sides of the core-pulling seat 18 are inserted into the limiting groove 21. The limiting groove on the limiting pressing plate cooperating with the limiting block on the core-pulling seat can limit the core-pulling seat.

[0034] Preferably, the limiting pressing plate 20 is detachably fixed to the moving mold base 5 through a plurality of bolts, which facilitates the later disassembly of the limiting pressing plate.

[0035] Preferably, the core block fixing plate 10 is detachably fixed to the moving mold base 5 through a plurality of bolts, which facilitates the later disassembly of the core block fixing plate.

[0036] The working principle of the present utility model is as follows: After changing the molding cavity from horizontal to vertical, the core pulling structure does not need to be set for the core block 6 of the first pipe orifice. It only needs to fix the core block 6 of the first pipe orifice on the upper template, and the core pulling of the core block 6 of the first pipe orifice can be realized while the upper template is being opened. Secondly, after changing the molding cavity from horizontal to vertical, when the vertical rotary core pulling mechanism 9 drives the core block 8 of the arc-shaped pipe to rotate and pull out the core, the moving areas of the moving template and the core block 8 of the arc-shaped pipe also change, and more is the demand for space in the vertical direction, greatly reducing the space occupied in the horizontal direction; before the core block 8 of the arc-shaped pipe is pulled out of the core, first drive the upper template to move upward to open the mold, and the upward movement of the upper template can drive the core block 7 of the second pipe orifice to automatically pull out the core through the horizontal core pulling component;

[0037] The core block 8 of the arc-shaped pipe is connected to the moving die base through a connecting rod and a core block fixing plate. Therefore, when the vertical rotary core pulling mechanism 9 drives the moving die base 5 to rotate, it can drive the core block 8 of the arc-shaped pipe to rotate and pull out the core. The lifting driver 17 can drive the driving rack to move up and down in the vertical direction. The up and down movement of the driving rack in the vertical direction can drive the rotating gear to rotate. The rotation of the rotating gear can drive the rotating plate 13 to rotate through the rotating shaft. The rotation of the rotating plate can drive the moving die base to turn upward around the rotating shaft. The rotation of the moving die base can drive the core block 8 of the arc-shaped pipe to rotate through the core block fixing plate and the connecting rod, so that the core block 8 of the arc-shaped pipe can be separated from the product;

[0038] When opening the mold, the upward movement of the upper template can drive the driving rod to move vertically upward. The vertically upward movement of the inclined driving rod can drive the core pulling seat to move horizontally away from the molding cavity, so as to drive the core block 7 of the second pipe orifice to translate and pull out the core. The limiting groove on the limiting pressing plate and the limiting block on the core pulling seat can limit the core pulling seat.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0040] Although terms such as upper template 1, lower template 2, molding cavity 3, stationary die base 4, moving die base 5, core block 6 of the first pipe orifice, core block 7 of the second pipe orifice, core block 8 of the arc-shaped pipe, vertical rotary core pulling mechanism 9, core block fixing plate 10, connecting rod 11, side baffle 12, rotating plate 13, rotating shaft 14, rotating gear 15, driving rack 16, lifting driver 17, core pulling seat 18, driving rod 19, limiting pressing plate 20, limiting groove 21, etc. are used more in this article, the use of these terms is only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. An injection molding vertical rotary core-pulling mold for a 90-degree drainage elbow pipe fitting, comprising an upper template (1) and a lower template (2), characterized in that, There are two vertically arranged forming cavities (3) symmetrically arranged between the upper template (1) and the lower template (2). A static mold base (4) and a moving mold base (5) are arranged on the lower template (2). A first pipe orifice core block (6) vertically inserted into the forming cavity (3) is arranged on the upper template (1). A second pipe orifice core block (7) horizontally inserted into the forming cavity (3) is arranged on the moving mold base (5). A horizontal core-pulling assembly connected to the second pipe orifice core block (7) is also arranged between the upper template (1) and the moving mold base (5). An arc-shaped pipe inner core block (8) connected to the moving mold base (5) is arranged in the forming cavity (3). A vertical rotary core-pulling mechanism (9) connected to the moving mold base (5) is also arranged on the lower template (2).

2. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 1, characterized in that, A core block fixing plate (10) is arranged on the front side of the moving mold base (5). A connecting rod (11) is horizontally fixed on the arc-shaped pipe inner core block (8). The connecting rod (11) horizontally penetrates through the second pipe orifice core block (7) and is connected to the core block fixing plate (10). The second pipe orifice core block (7) and the connecting rod (11) are slidably connected.

3. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 2, characterized in that, The vertical rotary core-pulling mechanism (9) includes two side baffles (12) vertically arranged at the top of the lower template (2) and respectively arranged on both sides of the moving mold base (5) and the static mold base (4). A rotary cavity is arranged inside the side baffle (12). Rotary plates (13) inserted into the rotary cavity are arranged on both sides of the moving mold base (5). The rotary plates (13) are rotationally connected to the side baffles (12) through a rotating shaft (14). The vertical rotary core-pulling mechanism (9) also includes a rotary assembly capable of driving the rotary plates (13) to rotate.

4. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 3, characterized in that, The rotary assembly includes a rotary gear (15) fixed on the rotating shaft (14). A driving rack (16) meshing with the rotary gear (15) and vertically arranged is also arranged inside the rotary cavity. A lifting driver (17) is fixedly connected to the outside of the lower template (2). The end of the output shaft of the lifting driver (17) is connected to the driving rack (16).

5. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 4, wherein A core-pulling seat (18) connected to the second pipe orifice core block (7) is slidably arranged on the moving mold base (5). The core-pulling seat (18) also slidably cooperates with the connecting rod (11).

6. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 5, characterized in that, The horizontal core-pulling assembly includes a driving rod (19) obliquely fixed at the bottom of the upper template (1). The driving rod (19) is inserted into the core-pulling seat (18) and slidably cooperates with the core-pulling seat (18).

7. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 6, wherein, A core-pulling seat limiting structure is also arranged on the moving mold base (5).

8. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 7, characterized in that, The core-pulling seat limiting structure includes limiting pressure plates (20) arranged on both sides of the core-pulling seat (18). A limiting groove (21) is recessed inward at the bottom of the inner side wall of the limiting pressure plate (20). Limiting blocks inserted into the limiting groove (21) are protruded on both sides of the core-pulling seat (18).

9. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 8, characterized in that, The limiting pressure plate (20) is detachably fixed on the moving mold base (5) through a plurality of bolts.

10. The 90-degree drainage elbow pipe fitting injection molding vertical rotary core-pulling mold according to claim 9, characterized in that, The core block fixing plate (10) is detachably fixed on the moving mold base (5) through a plurality of bolts.

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