Core pulling mechanism of pipe bending mold

Abstract

The utility model discloses a core-pulling mechanism of a pipe bending die, which belongs to the technical field of dies and is characterized by comprising a die holder, a first driving part, a first core-pulling slider, a second driving part and a second core-pulling slider, the first core-pulling slider is slidably arranged on the die holder, the output end of the first driving part is connected with the first core-pulling slider, and the output end of the second driving part is connected with the second core-pulling slider. The first driving piece is used for driving the first core-pulling sliding block to slide, so that the first core-pulling sliding block drives the inner core to be inserted into or pulled out of the pipe fitting cavity in a sliding mode, the second core-pulling sliding block is rotationally arranged on the mold base, the output end of the second driving piece is connected with a sliding block, and the sliding block is rotationally connected with a connecting rod which is rotationally connected with the second core-pulling sliding block. An arc-shaped groove used for guiding the second core-pulling sliding block is formed in the mold base, the second driving piece is used for driving the sliding block to move, and the sliding block drives the second core-pulling sliding block to rotate through the connecting rod, so that the second core-pulling sliding block drives the bent pipe inner core to be rotationally inserted into or pulled out of the pipe fitting cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and particularly relates to a core-pulling mechanism of a bending pipe mold. Background Art

[0002] At present, injection molds often require core-pulling mechanisms when molding hollow products. The core-pulling mechanism is pulled out of the inner cavity of the product when the injection molding is completed, driven by the opening and closing of the dynamic mold of the injection mold, to complete the injection molding of the product. In the injection molding production of plastic bent pipe products, due to the shape and structure characteristics of the bent pipe, the core-pulling mechanism is usually used to rotate and demold.

[0003] A Chinese patent with announcement number CN211074540U discloses a core-pulling mechanism for a bent tube for an injection mold, comprising a driving mechanism, wherein an output rod of the driving mechanism is connected to a rack arranged along the reciprocating motion direction of the output rod, teeth are evenly distributed on a first side of the rack, a core-pulling gear meshing with the teeth of the rack is arranged on the outside of the first side of the rack, one end of a bent tube core insert is fixedly connected to the core-pulling gear, the other end of the bent tube core insert is arranged corresponding to the port of the bent tube cavity of the injection mold, the bent tube core insert is used to rotatably insert into the bent tube cavity to form a tube core part of the bent tube cavity, the outer diameter of the bent tube core insert is smaller than the inner diameter of the bent tube cavity, and the core-pulling gear, the bent tube core insert and the bent tube cavity are arranged concentrically.

[0004] The above technical solution has the following defects: the core-pulling mechanism drives the rack to move through the driving mechanism, thereby driving the core-pulling gear meshing with the rack to rotate, so that the core-pulling gear drives the inner core insert of the bent tube to rotate and insert or withdraw it from the bent tube cavity, thereby realizing the core pulling of the bent tube cavity. However, since the rack and the core-pulling gear have high precision requirements, the meshing of the rack and the core-pulling gear requires precise matching, which is not easy to produce and manufacture, and is difficult to maintain in the later stage. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems existing in the prior art and to propose a core-pulling mechanism for a pipe bending mold, which has the advantage of convenient production and manufacturing.

[0006] The above-mentioned technical purpose of the utility model can be achieved through the following technical scheme: a core pulling mechanism of a bending tube mold, comprising a mold base, a driving member 1, a core pulling slider 1, a driving member 2 and a core pulling slider 2, the core pulling slider 1 being slidably arranged on the mold base, the output end of the driving member 1 being connected to the core pulling slider 1, the driving member 1 being used to drive the core pulling slider 1 to slide, so that the core pulling slider 1 drives the inner core to slide and insert or extract the pipe fitting cavity, the core pulling slider 2 being rotatably arranged on the mold base, the output end of the driving member 2 being connected with a sliding block, the sliding block being slidably arranged on the mold base, the sliding block being rotatably connected with a connecting rod, the connecting rod being rotatably connected with the core pulling slider 2, the mold base being provided with an arc groove for guiding the core pulling slider 2, the driving member 2 being used to drive the sliding block to move, the sliding block drives the core pulling slider 2 to rotate through the connecting rod, so that the core pulling slider 2 drives the inner core of the bent tube to rotate and insert or extract the pipe fitting cavity.

[0007] In the core pulling mechanism of the above-mentioned tube bending mold, a slide groove 1 is opened on the mold base, and the core pulling slider 1 is slidably set in the slide groove 1. A slide groove 2 is opened on the mold base, and the sliding block is slidably set in the slide groove 2.

[0008] In the core-pulling mechanism of the above-mentioned tube bending mold, the mold base is provided with a positioning shaft, and the core-pulling slider 2 is provided with a rotating hole for rotationally cooperating with the positioning shaft.

[0009] In the above-mentioned core pulling mechanism of a bending tube mold, a limiting block 1 is detachably arranged in the slide groove 1, and the lower end surface of the limiting block 1 is abutted against the upper end surface of the core pulling slider 1. A limiting block 2 is detachably arranged in the slide groove 2, and the lower end surface of the limiting block 2 is abutted against the upper end surface of the sliding block.

[0010] In the core-pulling mechanism of the above-mentioned tube bending mold, an arc-shaped block is detachably provided in the arc-shaped groove, and the lower end surface of the arc-shaped block is in contact with the upper end surface of the second core-pulling slider.

[0011] In the above-mentioned core pulling mechanism of a bending tube mold, the bottom of the slide groove one is detachably provided with a plurality of anti-wear plates one, the bottom of the slide groove two is detachably provided with a plurality of anti-wear plates two, and the bottom of the arc groove is detachably provided with a plurality of anti-wear plates three.

[0012] In the above-mentioned core pulling mechanism of a tube bending mold, a connecting shaft 1 is provided on the sliding block, one end of the connecting rod is rotatably connected to the connecting shaft 1, and a connecting shaft 2 is provided on the core pulling slider 2, and the other end of the connecting rod is rotatably connected to the connecting shaft 2.

[0013] In the core-pulling mechanism of the above-mentioned tube bending mold, the core-pulling slider 2 is inclined and the bottom surface of the arc-shaped groove is inclined.

[0014] In the above-mentioned core pulling mechanism of a tube bending mold, the core pulling mechanism also includes a driving cylinder, the output end of the driving cylinder is connected to a mounting seat, a ventilation pipe is arranged on the mounting seat, a ventilation flow channel is opened on the core pulling slider 2, the driving cylinder can drive the ventilation pipe to insert or pull out of the air inlet end of the ventilation flow channel, and the ventilation pipe is connected to an external air supply unit through a hose.

[0015] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0016] The core-pulling slider 2 is rotatably arranged on the mold base, and the sliding block is driven to move by the driving member 2. The sliding block drives the core-pulling slider 2 to rotate through the connecting rod, so that the core-pulling slider 2 drives the inner core of the bent pipe to rotate and insert or extract it from the pipe fitting cavity. The sliding block cooperates with the connecting rod to drive the core-pulling slider 2 to rotate, which has a simple structure and is convenient for production and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment;

[0018] Figure 2 It is a structural schematic diagram of another angle of the embodiment;

[0019] Figure 3 It is a structural schematic diagram of the core-pulling slider 2 and the inner core of the bent pipe in the embodiment;

[0020] Figure 4 It is a partial structural schematic diagram of an embodiment.

[0021] Figure numerals: 1, mold base; 2, driving member 1; 3, core-pulling slider 1; 4, driving member 2; 5, core-pulling slider 2; 6, sliding block; 7, connecting rod; 8, arc groove; 9, slide groove 1; 10, slide groove 2; 11, positioning shaft; 12, air flow channel; 13, limit block 1; 14, limit block 2; 15, arc block; 16, anti-wear plate 1; 17, anti-wear plate 2; 18, anti-wear plate 3; 19, connecting shaft 1; 20, connecting shaft 2; 21, driving cylinder; 22, mounting seat; 23, ventilation pipe; 24, rotating hole; 25, air outlet. DETAILED DESCRIPTION

[0022] 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.

[0023] A core pulling mechanism for a tube bending die, such as Figures 1 to 4As shown, it includes a mold base 1, a driving member 2, a core-pulling slider 3, a driving member 4 and a core-pulling slider 5. The core-pulling slider 3 is slidably arranged on the mold base 1, and the output end of the driving member 2 is connected to the core-pulling slider 3. The driving member 2 is used to drive the core-pulling slider 3 to slide, so that the core-pulling slider 3 drives the inner core to slide into or out of the pipe cavity. Preferably, in this embodiment, the driving member 2 adopts an oil cylinder. As other solutions, an electric cylinder or a pneumatic cylinder can also be used. The output end of the oil cylinder is extended or retracted to drive the core-pulling slider 3 to slide and drive the inner core to be inserted into or pulled out of the pipe cavity.

[0024] Furthermore, a slide groove 9 is provided on the mold base 1, and the core-pulling slider 3 is slidably arranged in the slide groove 9. The slide groove 9 guides the core-pulling slider 3, so that the core-pulling slider 3 is more stable when sliding, and then the core-pulling slider 3 drives the inner core to slide into or out of the pipe cavity more stably, avoiding damage to the pipe cavity.

[0025] A limit block 13 is detachably provided in the slide groove 9, and the lower end surface of the limit block 13 is in contact with the upper end surface of the core-pulling slider 3, so that the core-pulling slider 3 is limited by the limit block 13 to ensure the stability of the core-pulling slider 3 when sliding. In this embodiment, the limit block 13 is installed in the slide groove 9 by bolts, and the limit block 13 is easy to replace after being worn.

[0026] A plurality of anti-wear plates 16 are detachably provided at the bottom of the slide groove 9 to reduce the direct contact between the core-pulling slider 3 and the bottom of the slide groove 9, thereby reducing the wear caused by friction and extending the service life. In this embodiment, the anti-wear plate 16 is installed in the slide groove 9 by bolts, and the anti-wear plate 16 is easy to replace after being worn.

[0027] The core-pulling slider 2 5 is rotatably arranged on the mold base 1 , and the mold base 1 is provided with a positioning shaft 11 . The core-pulling slider 2 5 is provided with a rotating hole 24 for rotating with the positioning shaft 11 , that is, the core-pulling slider 2 5 can rotate with the positioning shaft 11 as the axis.

[0028] The output end of the driving member 24 is connected to a sliding block 6, and the sliding block 6 is slidably set on the mold base 1. The driving member 24 is used to drive the sliding block 6 to move. In this embodiment, the driving member 24 adopts an oil cylinder. As other solutions, an electric cylinder or a pneumatic cylinder can also be used. The output end of the oil cylinder is extended or retracted to drive the core-pulling slider 2 5 to slide.

[0029] Furthermore, a slide groove 10 is provided on the mold base 1, and the sliding block 6 is slidably arranged in the slide groove 10. The slide groove 10 guides the core-pulling slider 5, so that the core-pulling slider 5 slides more smoothly.

[0030] A limit block 14 is detachably provided in the second slide groove 10, and the lower end surface of the limit block 14 is in contact with the upper end surface of the sliding block 6, so that the sliding block 6 is limited by the limit block 14 to ensure the stability of the sliding block 6 when sliding. In this embodiment, the limit block 14 is installed in the second slide groove 10 by bolts, and the limit block 14 is easy to replace after being worn.

[0031] The bottom of the second slide groove 10 is detachably provided with a plurality of anti-wear plates 17 to reduce the direct contact between the sliding block 6 and the bottom of the second slide groove 10, thereby reducing the wear caused by friction and extending the service life. In this embodiment, the anti-wear plate 17 is installed in the second slide groove 10 by bolts, and the anti-wear plate 17 is easy to replace after being worn.

[0032] The sliding block 6 is rotatably connected with a connecting rod 7. Preferably, the connecting rod 7 is made of high-strength material. Specifically, the sliding block 6 is provided with a connecting shaft 19, one end of the connecting rod 7 is rotatably connected to the connecting shaft 19, the connecting rod 7 is rotatably connected to the core-pulling slider 2 5, the core-pulling slider 2 5 is provided with a connecting shaft 20, and the other end of the connecting rod 7 is rotatably connected to the connecting shaft 20.

[0033] The sliding block 6 drives the core-pulling slider 25 to rotate through the connecting rod 7, so that the core-pulling slider 25 drives the inner core of the bent tube to rotate and insert or withdraw it from the pipe fitting cavity. It should be noted that the sliding block 6 is driven to move by the driving member 24, and the sliding block 6 drives the core-pulling slider 25 to rotate through the connecting rod 7, so that the core-pulling slider 25 drives the inner core of the bent tube to rotate and insert or withdraw it from the pipe fitting cavity.

[0034] An arc groove 8 for guiding the core-pulling slider 25 is provided on the mold base 1. The arc groove 8 guides the core-pulling slider 25, making the core-pulling slider 25 more stable when rotating, thereby making the core-pulling slider 25 drive the inner core of the bent pipe to rotate and insert or withdraw it from the pipe cavity more stable, avoiding damage to the pipe cavity.

[0035] An arc block 15 is detachably provided in the arc groove 8, and the lower end surface of the arc block 15 is in contact with the upper end surface of the core-pulling slider 2 5, so that the arc block 15 limits the core-pulling slider 2 5 to ensure the stability of the core-pulling slider 2 5 during rotation. In this embodiment, the arc block 15 is installed in the arc groove 8 by bolts, and the arc block 15 is easy to replace after wear.

[0036] The bottom of the arc groove 8 is detachably provided with a plurality of anti-wear plates three 18 to reduce the direct contact between the core-pulling slider two 5 and the bottom of the arc groove 8, thereby reducing the wear caused by friction and extending the service life. In this embodiment, the anti-wear plate three 18 is installed in the arc groove 8 by bolts, and the anti-wear plate three 18 is easy to replace after being worn.

[0037] The core-pulling slider 25 is inclined, and the bottom surface of the arc groove 8 is inclined. It should be noted that in this embodiment, the curved portion of the pipe cavity is inclined, so the curved portion of the pipe cavity is adapted by the inclined core-pulling slider 25 and the inclined bottom surface of the arc groove 8.

[0038] The core pulling mechanism also includes a driving cylinder 21, the output end of the driving cylinder 21 is connected to a mounting seat 22, a ventilation pipe 23 is arranged on the mounting seat 22, and a ventilation flow channel 12 is opened on the core pulling slider 25. The driving cylinder 21 can drive the ventilation pipe 23 to insert or withdraw the air inlet end of the ventilation flow channel 12, and the ventilation pipe 23 is connected to the external air supply unit through a hose. It should be noted that an air outlet 25 is opened on the inner core of the bent pipe, and the air outlet 25 is connected to the ventilation flow channel 12. Air is supplied to the ventilation flow channel 12 through the hose and the ventilation pipe 23 by the external air supply unit. After passing through the ventilation flow channel 12, the gas flows out from the air outlet 25, and the air flow impacts the pipe cavity, thereby eliminating the vacuum adhesion between the inner core of the bent pipe and the pipe cavity, making it easier to pull out the inner core of the bent pipe.

[0039] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A core pulling mechanism for a pipe bending die, characterized in that: The invention comprises a mold base (1), a driving member 1 (2), a core-pulling slider 1 (3), a driving member 2 (4) and a core-pulling slider 2 (5), wherein the core-pulling slider 1 (3) is slidably arranged on the mold base (1), the output end of the driving member 1 (2) is connected to the core-pulling slider 1 (3), the driving member 1 (2) is used to drive the core-pulling slider 1 (3) to slide, so that the core-pulling slider 1 (3) drives the inner core to slide into or out of the pipe cavity, the core-pulling slider 2 (5) is rotatably arranged on the mold base (1), the output end of the driving member 2 (4) is connected to a sliding The mold base (1) is provided with a block (6), the sliding block (6) is slidably arranged on the mold base (1), the sliding block (6) is rotatably connected with a connecting rod (7), the connecting rod (7) is rotatably connected with the core-pulling slider (5), the mold base (1) is provided with an arc groove (8) for guiding the core-pulling slider (5), the driving member (4) is used to drive the sliding block (6) to move, the sliding block (6) drives the core-pulling slider (5) to rotate through the connecting rod (7), so that the core-pulling slider (5) drives the inner core of the bent pipe to rotate and insert or extract it from the pipe fitting cavity.

2. The core-pulling mechanism of a tube bending mold according to claim 1, characterized in that: The mold base (1) is provided with a slide groove (9), and the core-pulling slider (3) is slidably arranged in the slide groove (9). The mold base (1) is provided with a slide groove (10), and the sliding block (6) is slidably arranged in the slide groove (10).

3. The core-pulling mechanism of a tube bending mold according to claim 1, characterized in that: The mold base (1) is provided with a positioning shaft (11), and the second core-pulling slide block (5) is provided with a rotation hole (24) for rotationally cooperating with the positioning shaft (11).

4. The core-pulling mechanism of a tube bending mold according to claim 2, characterized in that: A limit block 1 (13) is detachably provided in the slide groove 1 (9), and the lower end surface of the limit block 1 (13) is in contact with the upper end surface of the core-pulling slider 1 (3); a limit block 2 (14) is detachably provided in the slide groove 2 (10), and the lower end surface of the limit block 2 (14) is in contact with the upper end surface of the sliding block (6).

5. The core-pulling mechanism of a tube bending mold according to claim 2, characterized in that: An arc block (15) is detachably arranged in the arc groove (8), and the lower end surface of the arc block (15) is in contact with the upper end surface of the second core-pulling slider (5).

6. The core-pulling mechanism of a tube bending mold according to claim 2, characterized in that: The bottom of the slide groove one (9) is detachably provided with a plurality of anti-wear plates one (16), the bottom of the slide groove two (10) is detachably provided with a plurality of anti-wear plates two (17), and the bottom of the arc groove (8) is detachably provided with a plurality of anti-wear plates three (18).

7. The core-pulling mechanism of a tube bending die according to claim 1, characterized in that: The sliding block (6) is provided with a connecting shaft 1 (19), and one end of the connecting rod (7) is rotatably connected to the connecting shaft 1 (19). The core-pulling sliding block (5) is provided with a connecting shaft 2 (20), and the other end of the connecting rod (7) is rotatably connected to the connecting shaft 2 (20).

8. The core-pulling mechanism of a tube bending die according to claim 1, characterized in that: The second core-pulling slide block (5) is arranged at an inclination, and the bottom surface of the arc-shaped groove (8) is arranged at an inclination.

9. The core-pulling mechanism of a tube bending mold according to claim 1, characterized in that: The core pulling mechanism also includes a driving cylinder (21), the output end of the driving cylinder (21) is connected to a mounting seat (22), a ventilation pipe (23) is arranged on the mounting seat (22), a ventilation flow channel (12) is opened on the core pulling slider (5), the driving cylinder (21) can drive the driving ventilation pipe (23) to insert into or withdraw from the air inlet end of the ventilation flow channel (12), and the ventilation pipe (23) is connected to an external air supply unit through a hose.

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