Core pulling mechanism of pipe bending mold

Abstract

The utility model relates to the technical field of bent pipe casting, in particular to a core pulling mechanism of a bent pipe mold, which comprises a reserved cavity arranged between an upper mold and a lower mold, a main shaft vertically penetrating between the bottom of the lower mold and the reserved cavity, and a connecting arm fixedly arranged between one end of a core and the top end of the main shaft, and the driving piece is positioned in the reserved cavity and is used for driving the main shaft to rotate clockwise or anticlockwise, so that the connecting arm is pulled out of the core or pushes the core to reset. According to the utility model, the connecting piece is arranged between the main shaft and the rocker arms, and the upper ejection piece is arranged between the rocker arms and the lower mold, so that when the driving piece drives the connecting arm to draw out the core, the upper mold can be synchronously released from being clamped and fixed by the two groups of rocker arms and the V-shaped clamping blocks; the upper mold is synchronously jacked up and completely separated from the lower mold, and a worker only needs to take down the upper mold and the bent pipe plastic part, so that the efficiency of core pulling and demolding operation of the bent pipe plastic part is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe bending casting technical field especially relates to a core pulling mechanism of pipe bending mould. BACKGROUND

[0002] The pipe bending plastic part is formed by injection molding, and the mold mainly comprises an upper mold, a lower mold and a core arranged between the upper mold and the lower mold. During demolding, the core is first pulled out by controlling the core pulling mechanism, then the upper mold is removed, and then the molded pipe bending plastic part is demolded and taken out, so that the operation of taking out the pipe bending plastic part can be completed.

[0003] However, in the above operation process, the core pulling, upper mold removal and demolding steps need to be performed in sequence, and the entire pipe bending plastic part taking operation can be completed, and the operation efficiency is relatively low. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a core pulling mechanism of pipe bending mold to solve the problem of relatively low demolding and taking operation efficiency.

[0005] To achieve the above purpose, the utility model provides a core pulling mechanism of pipe bending mold, which comprises a reserved cavity arranged between an upper mold and a lower mold and a main shaft vertically penetrating between the bottom of the lower mold and the reserved cavity, and further comprises:

[0006] A connecting arm fixedly arranged between one end of the core and the top end of the main shaft.

[0007] A driving member located in the reserved cavity, which is used to drive the main shaft to rotate clockwise or counterclockwise, so that the connecting arm pulls out the core or pushes the core to reset.

[0008] Two rocker arms relatively hinged to the lower mold, and a V-shaped clamping block is hinged to the top end of the rocker arm.

[0009] A connecting piece arranged between the bottom end of the rocker arm and the bottom end of the main shaft, which synchronously pushes the top end of the two rocker arms to deflect and approach or move away from each other when the driving member drives the main shaft to rotate.

[0010] An upper ejector arranged in the lower mold, which is contacted by the bottom end of the rocker arm to drive the upper mold to rise when the bottom ends of the two rocker arms approach each other.

[0011] Preferably, the driving member comprises a driving motor fixedly arranged in the reserved cavity and a worm wheel fixedly arranged at the top of the main shaft, and the output end of the driving motor is fixedly provided with a worm, and the external thread of the worm is engaged with the tooth groove of the worm wheel.

[0012] Preferably, the bottom of the worm is higher than the top of the connecting arm, and the main shaft is located between the driving motor and the connecting arm.

[0013] Preferably, the connecting piece comprises a cross connecting arm hinged to the bottom of the main shaft, and a connecting rod is hinged to the bottom end of the rocker arm, and a cross pushing arm is hinged between the connecting rod and the cross connecting arm.

[0014] Preferably, the core pulling mechanism further comprises two guide grooves oppositely arranged on the top of the upper die, and one of the inner walls of the guide grooves opposite to the end face of the V-shaped clamp block is an inclined surface, and the guide grooves are matched with the V-shaped clamp block, and when the V-shaped clamp block clamps the upper die, the upper die can be pushed to align the lower die in the horizontal direction.

[0015] Preferably, the bent edge of the V-shaped clamp block is hinged to the top end of the rocker arm, and the opening of the V-shaped clamp block is opposite to the inside of the guide groove.

[0016] Preferably, the upper top piece comprises a cross groove arranged on one of the vertical surfaces of the lower die, a cross inserting rod is slidingly inserted into the cross groove, a vertical groove is communicated between the inside of the cross groove and the top of the lower die, a vertical top rod is slidingly inserted into the vertical groove, a sliding block is arranged on one of the vertical surfaces of the vertical top rod, one end of the sliding block is slidingly sleeved with an inclined groove arranged on one of the vertical surfaces of the cross inserting rod, a spring is sleeved on one end of the outside of the cross inserting rod, and the two ends of the spring are fixedly arranged on the outside of the lower die and the cross inserting rod respectively.

[0017] Preferably, the two inclined grooves form an inverted eight-shaped structure, and one end of the cross inserting rod away from the lower die is located between the hinged point between the rocker arm and the lower die and the vertical surface of the lower die.

[0018] The utility model discloses the beneficial effects of:

[0019] The utility model discloses a connecting piece is arranged between the main shaft and the rocker arm and an upper top piece is arranged between the rocker arm and the lower die, so that when the driving piece drives the connecting arm to pull out the core, the clamping and fixing of the upper die by the two groups of rocker arms and V-shaped clamp blocks can be simultaneously released, the upper die can be simultaneously lifted and separated from the lower die when the core is completely pulled out, and the worker only needs to take down the upper die and the bent pipe plastic part, thereby greatly improving the efficiency of the core pulling and demolding operation of the bent pipe plastic part. Before secondary injection, the driving piece drives the connecting arm to push the core to the specified position between the upper die and the lower die, and simultaneously drives the two groups of rocker arms and V-shaped clamp blocks to clamp and fix the upper die on the top of the lower die. In this process, the extrusion force of the rocker arm on the cross inserting rod gradually decreases, and the vertical top rod can be retracted and reset under the elastic force of the spring, thereby realizing automatic butt joint and fixing the upper die, replacing the manual operation of the worker to align and fix the upper die, and improving the efficiency of the butt joint and fixing of the upper die and the lower die. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0021] Figure 1 Schematic view of the present application Figure 1 ;

[0022] Figure 2 Schematic view of the present application Figure 2 ;

[0023] Figure 3 Schematic view of the present application Figure 3 ;

[0024] Figure 4 Schematic view of the present application Figure 4 .

[0025] Marked as:

[0026] 1, reserved cavity; 2, main shaft; 3, connecting arm; 4, driving part; 41, driving motor; 42, worm; 43, worm gear; 5, rocker arm; 6, V-shaped clamping block; 7, connecting piece; 71, transverse connecting arm; 72, transverse push arm; 73, connecting rod; 8, upper top piece; 81, transverse groove; 82, transverse inserting rod; 83, spring; 84, vertical groove; 85, vertical top rod; 86, inclined groove; 87, sliding block; 9, guide groove. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] As shown in Figures 1 to 4 , a core pulling mechanism of a pipe bending mold, comprising a reserved cavity 1 arranged between an upper mold and a lower mold and a main shaft 2 vertically arranged between the bottom of the lower mold and the reserved cavity 1, the core pulling mechanism further comprising:

[0030] a connecting arm 3 fixedly arranged between one end of the core and the top end of the main shaft 2.

[0031] a driving member 4 arranged in the reserved cavity 1, the driving member 4 being used to drive the main shaft 2 to rotate clockwise or counterclockwise, so that the connecting arm 3 pulls out the core or pushes the core to reset.

[0032] two rocker arms 5 hingedly arranged on the lower mold, the top end of each rocker arm 5 being hingedly connected with a V-shaped clamping block 6.

[0033] a connecting member 7 arranged between the bottom end of each rocker arm 5 and the bottom end of the main shaft 2, when the driving member 4 drives the main shaft 2 to rotate, the two connecting members 7 synchronously push the top end of each rocker arm 5 to deflect and move close to or away from each other, when the top end of each rocker arm 5 moves close to each other, the two V-shaped clamping blocks 6 push the upper mold to the center and press down the upper mold, so that the upper mold closely contacts with the lower mold, the mold closing operation is completed, the upper cavity and the lower cavity between the upper mold and the lower mold are filled with injection material, and the curved surface of the core is wrapped, after the core is cooled and shaped, the rocker arms 5 are reversely deflected, the top end of each rocker arm 5 moves away from each other, and the V-shaped clamping block 6 is separated from the upper mold, so that the upper mold is released from the limiting and fixing, when the upper mold and the lower mold are closed, the driving member 4 drives the main shaft 2 and the connecting arm 3 to rotate clockwise at the same time, so that the connecting arm 3 pushes the core to reset to a specified position between the upper mold and the lower mold, when the upper mold and the lower mold are separated, the driving member 4 drives the main shaft 2 and the connecting arm 3 to rotate counterclockwise at the same time, so that the connecting arm 3 pulls out the core from the pipe-shaped plastic part.

[0034] an upper lifting member 8 arranged in the lower mold, when the bottom end of each rocker arm 5 moves close to each other, the bottom end of each rocker arm 5 contacts with the upper lifting member 8 to operate and lift the upper mold, when the core is pulled out from the pipe-shaped plastic part, the bottom end of each rocker arm 5 moves close to the outside of the lower mold and contacts with the upper lifting member 8 to operate, so that the core is pulled out and the upper mold is lifted at the same time, the upper mold and the lower mold are separated, and the core pulling and demolding efficiency of the pipe-shaped plastic part is improved.

[0035] As shown in Figures 2 to 4 , the driving member 4 comprises a driving motor 41 fixedly arranged in the reserved cavity 1 and a worm wheel 43 fixedly arranged at the top of the main shaft 2, the output end of the driving motor 41 is fixedly provided with a worm 42, the external thread of the worm 42 is engaged with the tooth groove of the worm wheel 43.

[0036] The bottom of the worm 42 is higher than the top of the connecting arm 3, the main shaft 2 is located between the driving motor 41 and the connecting arm 3, by controlling the rotating direction of the output end of the driving motor 41, the rotating direction of the main shaft 2 can be controlled, thus the deflection direction of the two rocker arms 5 can be controlled synchronously through the connecting piece 7, the top ends of the two rocker arms 5 are close to or away from each other, the two V-shaped clamping blocks 6 can clamp and fix the upper mold or release the clamping and fixing of the upper mold, the upper mold and the pipe plastic part can be conveniently taken out, and since the interlocking effect is provided between the worm 42 and the worm wheel 43, the position of the core can be fixed, and the position deviation of the core during the injection of the raw material is avoided, so as to affect the size specification of the pipe plastic part.

[0037] As shown in Figure 2 and Figure 3 , the connecting piece 7 includes a cross connecting arm 71 hinged to the bottom of the main shaft 2, the bottom end of the rocker arm 5 is hinged with a connecting rod 73, and the connecting rod 73 and the cross connecting arm 71 are hinged with a cross push arm 72, when the main shaft 2 rotates counterclockwise, the opposite ends of the two cross connecting arms 71 are close to each other in the horizontal direction and relatively deviate in the circumferential direction, thus the opposite ends of the two cross push arms 72 are linearly close to each other, the top ends of the two rocker arms 5 are away from each other, the distance between the two V-shaped clamping blocks 6 is increased, the clamping and fixing of the upper mold is released, the upper mold and the pipe plastic part can be conveniently taken out after the core pulling, and vice versa, the upper mold is clamped and fixed, so as to closely fit between the upper mold and the lower mold, complete the mold closing and core resetting operation, and facilitate the injection of the raw material.

[0038] As shown in Figure 1 , the core pulling mechanism further includes two guide grooves 9 oppositely arranged on the top of the upper mold, one of the inner walls of the guide grooves 9 opposite to the end face of the V-shaped clamping block 6 is an inclined surface, the guide grooves 9 are matched with the V-shaped clamping block 6, when the V-shaped clamping block 6 clamps the upper mold, the upper mold can be pushed to align with the lower mold in the horizontal direction.

[0039] The bent edge of the V-shaped clamping block 6 is hinged to the top end of the rocker arm 5, and the opening of the V-shaped clamping block 6 is opposite to the inside of the guide groove 9, when the V-shaped clamping block 6 is close to each other and clamps the upper mold, the upper edge of the V-shaped clamping block 6 abuts against the inside of the guide groove 9 and abuts against the inclined surface in the guide groove 9, thus the upper mold can be pushed to be centered between the top ends of the two rocker arms 5, and at the same time, the upper mold and the lower mold can be pushed to be aligned in the horizontal direction perpendicular to the moving direction of the V-shaped clamping block 6, thus the positioning and mold closing precision of the upper and lower molds can be improved, and the injection quality of the pipe plastic part is avoided to be affected.

[0040] As shown in Figures 2 to 4As shown, the upper part 8 comprises a horizontal slot 81 arranged on one vertical surface of the lower mold, a horizontal plug rod 82 is slidingly inserted into the horizontal slot 81, a vertical slot 84 is communicated between the inside of the horizontal slot 81 and the top of the lower mold, a vertical top rod 85 is slidingly inserted into the vertical slot 84, one vertical surface of the vertical top rod 85 is provided with a sliding block 87, one end of the sliding block 87 is slidingly sleeved with an inclined slot 86 arranged on one vertical surface of the horizontal plug rod 82, the two inclined slots 86 form an inverted eight-shaped, one end of the outside of the horizontal plug rod 82 is sleeved with a spring 83, and the two ends of the spring 83 are fixedly arranged on the lower mold and the outside of the horizontal plug rod 82 respectively.

[0041] The end of the horizontal plug rod 82 away from the lower mold is located between the hinge point between the rocker arm 5 and the lower mold and the vertical surface of the lower mold, and the two rocker arms 5 are driven by the driving member 4 to move away from each other at the top end, and move close to each other at the bottom end, and push the horizontal plug rod 82 to shrink into the horizontal slot 81, in this process, the inclined slot 86 and the sliding block 87 are relatively displaced in the horizontal direction, and are also relatively displaced in the vertical direction, so that the sliding block 87 moves upward and pushes the vertical top rod 85 to move upward synchronously, and this action occurs during the separation of the two V-shaped clamping blocks 6 and the upper mold, so that the upper mold can be lifted, and workers do not need to disassemble the upper mold, but only need to take it down, and vice versa, the upper mold can be clamped and fixed on the top of the lower mold, so that the two are aligned in the horizontal direction.

[0042] Working principle: after injection molding, the driving motor 41 is controlled to drive the main shaft 2 to rotate counterclockwise and drive the connecting arm 3 and the core to rotate in the same direction, the core pulling operation is completed, at the same time, the main shaft 2 drives the two transverse connecting arms 71 and the horizontal push arm 72 to move close to each other, so that the two rocker arms 5 are pulled to deflect away from each other, the upper mold is released from the clamped fixed state, and the bottom end of the rocker arm 5 pushes the horizontal insertion rod 82 to retract into the horizontal groove 81 when the upper mold is released from the clamped fixed state, in the process, the inclined groove 86 and the sliding block 87 move relative to each other in the horizontal direction, and the two also move relative to each other in the vertical direction, so that the sliding block 87 moves upward and pushes the vertical top rod 85 to move upward synchronously, the action occurs during the separation of the two V-shaped clamping blocks 6 and the upper mold, so that the upper mold is lifted without the need for workers to disassemble the upper mold, and only needs to be removed, so that the core pulling operation and the separation operation of the upper mold and the lower mold are completed synchronously, the difficulty and efficiency of disassembling the upper mold are improved, and when the upper mold and the lower mold are used again, the upper mold is placed on the top of the lower mold, then the driving motor 41 is controlled to drive the main shaft 2 to rotate reversely, and the connecting arm 3 and the core rotate in the same direction, the core is reset to the specified position between the upper mold and the lower mold, at the same time, the main shaft 2 drives the two transverse connecting arms 71 and the horizontal push arm 72 to move away from each other, so that the two rocker arms 5 are pulled to deflect away from each other, the two V-shaped clamping blocks 6 are pushed to move close to each other, when the two V-shaped clamping blocks 6 move close to each other, the V-shaped clamping blocks 6 abut against the inclined surface in the guide groove 9, so that the upper mold and the lower mold are aligned in the longitudinal and horizontal directions, and the two are tightly fitted in the vertical direction, the mold closing operation between the two is completed, and finally the injection material is injected.

[0043] Those skilled in the art will understand that the discussion of any of the above embodiments is merely exemplary and is not intended to limit the scope of the present application (including claims) to these examples; under the concept of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in detail for the sake of brevity.

[0044] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. A core-pulling mechanism for a pipe bending mold, comprising a reserved cavity (1) disposed between an upper mold and a lower mold, and a main shaft (2) vertically penetrating between the bottom of the lower mold and the reserved cavity (1), characterized in that, The core-pulling mechanism also includes: A connecting arm (3) is fixedly installed between one end of the core and the top end of the main shaft (2); The drive unit (4) located in the reserved cavity (1) is used to drive the main shaft (2) to rotate clockwise or counterclockwise, so that the connecting arm (3) can pull out the core or push the core to reset. Two rocker arms (5) are hinged to the lower mold respectively, and a V-shaped clamping block (6) is hinged to the top of each rocker arm (5); The connecting piece (7) located between the bottom end of the rocker arm (5) and the bottom end of the main shaft (2) causes the two connecting pieces (7) to simultaneously push the top ends of the two rocker arms (5) to deflect and move closer or further away from each other when the driving member (4) drives the main shaft (2) to rotate. The upper ejector (8) located in the lower mold moves and lifts the upper mold when the bottom ends of the two rocker arms (5) approach each other.

2. The core-pulling mechanism of the pipe bending mold according to claim 1, characterized in that, The drive component (4) includes a drive motor (41) fixedly installed in the reserved cavity (1) and a worm gear (43) fixedly installed on the top of the main shaft (2). The output end of the drive motor (41) is fixedly provided with a worm (42), and the external thread of the worm (42) meshes with the tooth groove of the worm gear (43).

3. The core-pulling mechanism of the pipe bending mold according to claim 2, characterized in that, The bottom of the worm (42) is higher than the top of the connecting arm (3), and the main shaft (2) is located between the drive motor (41) and the connecting arm (3).

4. The core-pulling mechanism of the pipe bending mold according to claim 1, characterized in that, The connector (7) includes a horizontal connecting arm (71) hinged to the bottom of the main shaft (2), a connecting rod (73) hinged to the bottom end of the rocker arm (5), and a horizontal push arm (72) hinged between the connecting rod (73) and the horizontal connecting arm (71).

5. The core-pulling mechanism of the pipe bending mold according to claim 1, characterized in that, The core-pulling mechanism also includes two guide grooves (9) located opposite each other on the top of the upper mold. The inner wall of one of the guide grooves (9) opposite to the end face of the V-shaped clamp (6) is an inclined surface. The guide groove (9) matches the V-shaped clamp (6). When the V-shaped clamp (6) clamps the upper mold, it can push the upper mold to align with the lower mold in the horizontal direction.

6. The core-pulling mechanism of the pipe bending die according to claim 5, characterized in that, The bent edge of the V-shaped clamp (6) is hinged to the top of the rocker arm (5), and the opening of the V-shaped clamp (6) is opposite to the inside of the guide groove (9).

7. The core-pulling mechanism of the pipe bending mold according to claim 1, characterized in that, The upper ejector (8) includes a horizontal groove (81) on one of the vertical surfaces of the lower mold. A horizontal rod (82) is slidably inserted inside the horizontal groove (81). A vertical groove (84) connects the interior of the horizontal groove (81) and the top of the lower mold. A vertical ejector rod (85) is slidably inserted inside the vertical groove (84). A slider (87) is provided on one of the vertical surfaces of the vertical ejector rod (85). One end of the slider (87) is slidably sleeved with an inclined groove (86) on one of the vertical surfaces of the horizontal rod (82). A spring (83) is sleeved on one end of the horizontal rod (82). The two ends of the spring (83) are respectively fixed to the exterior of the lower mold and the horizontal rod (82).

8. The core-pulling mechanism of the pipe bending die according to claim 7, characterized in that, The two inclined grooves (86) together form an inverted V-shape, and the end of the horizontal insert rod (82) away from the lower mold is located between the hinge point between the rocker arm (5) and the lower mold and the vertical surface of the lower mold.

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