A kind of automatic rotating core-pulling demoulding mold for bent pipe

Abstract

The present invention relates to the field of mold technology, and specifically to an automatic rotating core-pulling and demolding mold for bending pipes, comprising a workbench, a first hydraulic structure and a second hydraulic structure are respectively arranged on the surface of the workbench, a bending pipe mold is detachably installed on the surface of the workbench, a heat dissipation vibration structure for vibrating and dissipating heat of the bending pipe mold is arranged in the middle of the workbench, a swing limiting structure for limiting the bending pipe mold is arranged on the side of the heat dissipation vibration structure, and a wiping structure for wiping the first hydraulic structure and the second hydraulic structure is arranged on the side of the heat dissipation vibration structure away from the swing limiting structure. The core is pulled out respectively by reversely driving the first hydraulic structure and the second hydraulic structure, driving the heat dissipation vibration structure to close and generate gas to blow air to dissipate heat on the outer ring surface of the bending pipe mold, and vibrating the bending pipe mold, thereby effectively preventing the material inside the bending pipe mold from sticking and affecting subsequent demolding, and blowing air to dissipate heat from the bending pipe mold, which can reduce the mold temperature and reduce thermal expansion.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, in particular to an automatic rotating core-pulling and demoulding mould for bent pipes. Background Art

[0002] At present, the molding of plastic parts with bent tubes is an important problem in plastic injection molding. Plastic molds produce bent tube products. The main structure of the mold includes an upper cavity and a lower cavity. There is a core between the upper cavity and the lower cavity. The core consists of an elbow core and a straight core. When demolding the bent tube, the elbow core and the straight core must be pulled out first.

[0003] However, when the core (elbow core and straight core, hereinafter referred to as core) is pulled out, most of them are done by mechanical core pulling or hydraulic core pulling. The hydraulic core pulling is to slowly pull out the core through the hydraulic structure, so as to facilitate the subsequent demolding. However, after the core is pulled out, the inside of the mold will still stick. If sticking occurs, it takes extra time and energy to deal with the sticking problem, such as manually separating the plastic part from the mold, cleaning the mold, etc., which not only prolongs the demolding time, but also reduces the continuous production efficiency. In addition, during the continuous production process, the core is constantly pulled out of the mold and generates friction, which will generate high temperature to the mold, which will not only increase the sticking phenomenon inside the mold, but also reduce the service life of the mold.

[0004] In addition, during the process of multiple extraction and insertion of the core into the mold, sticky material may appear on the outer ring surface of the core. For example, in the injection mold, the plastic melt may adhere to the outer ring surface of the core. This adhesion will affect the smoothness of the insertion and extraction of the core, and will also affect the demolding effect of the product. In view of this, we propose an automatic rotating core-pulling demolding mold for bent pipes. Summary of the invention

[0005] The object of the present invention is to provide a bending pipe automatic rotating core-pulling demoulding die to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides an automatic rotating core-pulling demoulding mold for bending pipes, comprising a workbench, the surface of the workbench is respectively provided with a first hydraulic structure and a second hydraulic structure, the surface of the workbench is detachably provided with a bending pipe mold, a heat dissipation vibration structure for vibrating and dissipating heat of the bending pipe mold is provided in the middle of the workbench, a swing limiting structure for limiting the bending pipe mold is provided on the side of the heat dissipation vibration structure, and a wiping structure for wiping the first hydraulic structure and the second hydraulic structure is provided on the side of the heat dissipation vibration structure away from the swing limiting structure;

[0007] When inserting the core, the first hydraulic structure and the second hydraulic structure are driven to insert the core into the tube bending mold respectively, and the heat dissipation vibration structure is driven to open to vibrate the tube bending mold, and then the swing limit structure is driven to swing inward, and the swing limit structure of the limit tube bending mold is moved to the entrance of the inserted core to limit, and then the wiping structure is driven to swing to wipe the outer annular surface of the core;

[0008] When pulling out the core, the core is pulled out respectively by driving the first hydraulic structure and the second hydraulic structure in reverse, driving the heat dissipation vibration structure to close and generate gas to blow air to the outer ring surface of the pipe bending mold for heat dissipation, and then driving the swing limit structure to swing outward, moving the swing limit structure of the limit pipe bending mold to the middle limit of the pipe bending mold, and then driving the wiping structure to swing and vibrate.

[0009] Preferably, the first hydraulic structure provided on the surface of the workbench is used for pulling out the straight core, and the second hydraulic structure provided on the surface of the workbench is used for pulling out the elbow core.

[0010] Preferably, the heat dissipation vibration structure includes a rotating shaft, which passes through and is rotatably connected inside the workbench, and one end of the rotating shaft close to the workbench surface is fixedly connected to a rotating disk, and the side of the rotating disk is fixedly connected to the second hydraulic structure, and the side of the rotating disk is movably connected to a driving plate, and the surface of the workbench is fixedly connected to a first fan blade plate, and the first fan blade plate is slidably connected to the inside of the second fan blade plate, and the second fan blade plate is slidably connected to the inside of the third fan blade plate, and the surfaces of the first fan blade plate, the second fan blade plate and the third fan blade plate are respectively fixedly connected with protrusions.

[0011] Preferably, the swing limiting structure includes a return spring, the return spring is fixedly connected to a slide groove opened on the surface of the workbench, the side of the return spring is fixedly connected to a first sliding plate, the first sliding plate is slidably connected to the slide groove opened on the surface of the workbench, the surface of the first sliding plate is rotatably connected to the first swing plate through a pin shaft, the surface of the first swing plate is rotatably connected to the first limiting shaft, the bottom of the first limiting shaft is fixedly connected to the workbench, the side of the first swing plate away from the first sliding plate is movably connected to the second sliding plate, the surface of the second sliding plate is slidably connected to the first limiting plate, the first limiting plate is fixedly connected to the surface of the workbench, and the side of the second sliding plate away from the first swing plate is fixedly connected to the first U-shaped plate.

[0012] Preferably, the wiping structure includes a second limiting shaft, the bottom of the second limiting shaft is fixedly connected to the workbench, the outer ring surface of the second limiting shaft is rotatably connected to the second swing plate, the side of the second swing plate close to the first sliding plate is rotatably connected through a pin shaft, the side of the second swing plate away from the first sliding plate is movably connected to the third sliding plate, the surface of the third sliding plate is slidably connected to the second limiting plate, the bottom of the second limiting plate is fixedly connected to the workbench, the side of the third sliding plate away from the second swing plate is fixedly connected to an inverted U-plate, and the side of the second swing plate is fixedly connected to a wiping plate.

[0013] Preferably, a plurality of groups of air holes are respectively provided on the surfaces of the first blade plate, the second blade plate and the third blade plate, the first blade plate is longer than the second blade plate, the second blade plate is longer than the third blade plate, the third blade plate is fixedly connected to the rotating shaft, and the second blade plate is slidably connected to the first blade plate.

[0014] Preferably, the first sliding plate is arranged in an arc shape close to the heat dissipation vibration structure, the return spring connected to the bottom of the first sliding plate is provided with a damping rod, the first swing plate connected to the surface of the first sliding plate by a pin is arranged in a rectangular shape, the second sliding plate movably connected to the first swing plate away from the side of the first sliding plate is arranged in a rectangular shape, the first U-shaped plate fixedly connected to the surface of the second sliding plate is arranged in a U shape, and is adapted to the pipe bending mold, and the first U-shaped plate is made of soft material.

[0015] Preferably, several groups of wave blocks are arranged on the surface of the third sliding plate, the wave blocks arranged on the surface of the third sliding plate are adapted to each other with the wave blocks arranged on the side of the first hydraulic structure, the third sliding plate is adapted to each other with the inside of the second limiting plate, and the inverted U-plate fixedly connected to the side of the third sliding plate is adapted to each other with the first hydraulic structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the automatic rotating core-pulling and demolding mold for bending pipes, the core is pulled out respectively by reversely driving the first hydraulic structure and the second hydraulic structure, driving the heat dissipation vibration structure to close and generate gas to blow air to dissipate heat on the outer ring surface of the bending pipe mold, and vibrating the bending pipe mold, effectively preventing the material from sticking inside the bending pipe mold and affecting the subsequent demolding, and blowing air to dissipate heat on the bending pipe mold can reduce the mold temperature and reduce thermal expansion, so that the mold can maintain a more stable size during operation, and then drive the swing limit structure to swing outward, and move the swing limit structure of the limited bending pipe mold to the middle limit of the bending pipe mold, effectively improving the stability of the limited bending pipe mold when pulling out the core, preventing the bending pipe mold from shaking when pulling out the core and affecting the formation of the material, and then drive the wiping structure to swing to generate vibration and remove the material sticking to the outer ring surface of the core.

[0018] 2. In this kind of automatic rotating core-pulling and demolding mold for bending pipes, the core is inserted into the inside of the bending pipe mold by driving the first hydraulic structure and the second hydraulic structure respectively, and the heat dissipation vibration structure is driven to open to vibrate the bending pipe mold, and then the swing limit structure is driven to swing inward, and the swing limit structure of the limited bending pipe mold is moved to the entrance of the inserted core for limiting, so that the bending pipe mold can be limited at the entrance of the inserted core to prevent the bending pipe mold from shaking unstably when the core is inserted, thereby affecting the production efficiency, and then the wiping structure is driven to swing to wipe the outer ring surface of the core, and then the core inserted into the bending pipe mold can be wiped. By wiping the outer ring surface of the core, dust, impurities, oil stains and other pollutants on the surface can be removed to prevent these substances from being pressed into the product surface during the molding process, thereby improving the surface finish and appearance quality of the elbow product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0020] Figure 2 It is a top view of the overall structure of the present invention;

[0021] Figure 3 It is a top perspective view of the hydraulic structure of the present invention;

[0022] Figure 4 It is a side perspective view of the heat dissipation vibration structure of the present invention;

[0023] Figure 5 It is a top perspective view of the heat dissipation vibration structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the swing limiting structure of the present invention;

[0025] Figure 7 It is a partial schematic diagram of the wiping structure of the present invention;

[0026] Figure 8 It is a two-dimensional schematic diagram of the motion state of the overall structure of the present invention.

[0027] The meaning of each number in the figure is:

[0028] 1. Workbench; 2. First hydraulic structure; 3. Second hydraulic structure; 4. Bending tube mold; 500. Heat dissipation vibration structure; 501. Rotating shaft; 502. Rotating disk; 503. Driving plate; 504. First blade plate; 505. Second blade plate; 506. Third blade plate; 507. Bump; 600. Swing limit structure; 601. First sliding plate; 602. Return spring; 603. First swing plate; 604. First limit axis; 605. Second sliding plate; 606. First limit plate; 607. First U-shaped plate; 700. Wiping structure; 701. Second swing plate; 702. Second limit axis; 703. Wiping plate; 704. Third sliding plate; 705. Second limit plate; 706. Inverted U plate. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For the embodiments of the present invention, please refer to Figures 1 to 8 A pipe bending automatic rotary core-pulling demoulding mold comprises a workbench 1, a first hydraulic structure 2 and a second hydraulic structure 3 are respectively arranged on the surface of the workbench 1, a pipe bending mold 4 is detachably mounted on the surface of the workbench 1, a heat dissipation vibration structure 500 for vibrating and dissipating heat of the pipe bending mold 4 is arranged in the middle of the workbench 1, a swing limiting structure 600 for limiting the pipe bending mold 4 is arranged on the side of the heat dissipation vibration structure 500, and a wiping structure 700 for wiping the first hydraulic structure 2 and the second hydraulic structure 3 is arranged on the side of the heat dissipation vibration structure 500 away from the swing limiting structure 600;

[0031] When inserting the core, the first hydraulic structure 2 and the second hydraulic structure 3 are driven to insert the core into the tube bending mold 4 respectively, and the heat dissipation vibration structure 500 is driven to open to vibrate the tube bending mold 4, and then the swing limiting structure 600 is driven to swing inward, and the swing limiting structure 600 of the limiting tube bending mold 4 is moved to the entrance of the inserted core for limiting, and then the wiping structure 700 is driven to swing to wipe the outer annular surface of the core;

[0032] When pulling out the core, the core is pulled out respectively by driving the first hydraulic structure 2 and the second hydraulic structure 3 in reverse, driving the heat dissipation vibration structure 500 to close and generate gas to blow air to the outer ring surface of the bending mold 4 for heat dissipation, and then driving the swing limiting structure 600 to swing outward, moving the swing limiting structure 600 of the limiting bending mold 4 to the middle limit of the bending mold 4, and then driving the wiping structure 700 to swing to generate vibration.

[0033] The present invention takes into account that, when cores of elbow cores and straight cores (hereinafter referred to as cores) are pulled out, most of them are done by mechanical core pulling or hydraulic core pulling, wherein hydraulic core pulling is to slowly pull out the core by means of a hydraulic structure, thereby facilitating subsequent demoulding. However, after the core is pulled out, sticking may still occur inside the mold. If sticking occurs, it takes extra time and effort to deal with the sticking problem, such as manually separating the plastic part from the mold, cleaning the mold, etc. This not only prolongs the demoulding time, but also reduces the continuous production efficiency. Moreover, during the continuous production process, the core is continuously pulled out of the mold and generates friction, which in turn generates high temperature to the mold, which not only increases the sticking phenomenon inside the mold, but also reduces the service life of the mold. Therefore, by reversely driving the first hydraulic structure 2 The first and second hydraulic structures 3 are used to pull out the core respectively, and the heat dissipation vibration structure 500 is driven to close and generate gas to blow air to dissipate heat on the outer ring surface of the pipe bending mold 4, and vibrate the pipe bending mold 4, so as to effectively prevent the material from sticking inside the pipe bending mold 4 and affecting the subsequent demoulding. Moreover, the heat dissipation by blowing air to the pipe bending mold 4 can reduce the mold temperature and reduce thermal expansion, so that the mold can maintain a more stable size during the working process. Then, the swing limiting structure 600 is driven to swing outward, and the swing limiting structure 600 of the limited pipe bending mold 4 is moved to the middle limit of the pipe bending mold 4, so as to effectively improve the stability of the limited pipe bending mold 4 when the core is pulled out, and prevent the pipe bending mold 4 from shaking when the core is pulled out and affecting the formation of the material. Then, the wiping structure 700 is driven to swing to generate vibration and remove the material sticking to the outer ring surface of the core.

[0034] In addition, during the process of repeatedly pulling out and inserting the core into the mold, the outer ring surface of the core may have sticky material. For example, in the injection mold, the plastic melt may adhere to the outer ring surface of the core. This adhesion will affect the smoothness of the insertion and extraction of the core, and will also affect the demolding effect of the product. The core is inserted into the inside of the bending mold 4 by driving the first hydraulic structure 2 and the second hydraulic structure 3 respectively, and the heat dissipation vibration structure 500 is driven to open to vibrate the bending mold 4, and then the swing limit structure 600 is driven to swing inward to limit the swing limit of the bending mold 4. The structure 600 moves to the entrance of the inserted core to limit the position, so that the bending mold 4 can be limited at the entrance of the inserted core to prevent the bending mold 4 from unstable shaking when the core is inserted, thereby affecting the production efficiency. Then the wiping structure 700 is driven to swing and wipe the outer ring surface of the core, and then the core inserted inside the bending mold 4 can be wiped. By wiping the outer ring surface of the core, dust, impurities, oil and other pollutants on the surface can be removed to prevent these substances from being pressed into the product surface during the molding process, thereby improving the surface finish and appearance quality of the elbow product.

[0035] In order to insert the core into the tube bending mold 4, the following specific structure is required, please refer to Figures 1 to 3The first hydraulic structure 2 provided on the surface of the workbench 1 is used for drawing the straight core, and the second hydraulic structure 3 provided on the surface of the workbench 1 is used for drawing the elbow core;

[0036] First, the staff installs the pipe bending mold 4 on the surface of the workbench 1, and loads the material into the pipe bending mold 4. Then, the staff simultaneously opens the first hydraulic structure 2 and the second hydraulic structure 3, so that the first hydraulic structure 2 and the second hydraulic structure 3 are respectively inserted into the pipe bending mold 4, thereby inserting the core into the pipe bending mold 4, thereby producing the desired product;

[0037] Next, in order to achieve vibration on the surface of the bending mold 4, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 4 The heat dissipation vibration structure 500 includes a rotating shaft 501, which penetrates and is rotatably connected inside the workbench 1. One end of the rotating shaft 501 close to the surface of the workbench 1 is fixedly connected with a rotating disk 502, and the side of the rotating disk 502 is fixedly connected to the second hydraulic structure 3. The side of the rotating disk 502 is movably connected with a driving plate 503. The surface of the workbench 1 is fixedly connected with a first blade plate 504, and the first blade plate 504 is slidably connected with a second blade plate 505. The second blade plate 505 is slidably connected with a third blade plate 506. The surfaces of the first blade plate 504, the second blade plate 505 and the third blade plate 506 are respectively fixedly connected with bumps 507;

[0038] When the first hydraulic structure 2 and the second hydraulic structure 3 are respectively inserted into the interior of the tube bending mold 4, the rotating shaft 501 will be driven to rotate around the center of the rotating disk 502 and the rotating disk 502 will be driven to rotate, and then the third blade plate 506 will be driven to rotate around the center of the rotating disk 502, and the second blade plate 505 and the first blade plate 504 will be driven to open respectively, and finally a fan shape is formed. Since the surfaces of the first blade plate 504, the second blade plate 505 and the third blade plate 506 are respectively provided with protrusions 507, and the outer ring surface of the tube bending mold 4 is provided with a circular ring, when the first blade plate 504, the second blade plate 505 and the third blade plate 506 swing around the center of the rotating disk 502, the protrusion 507 will be driven to contact the circular ring provided on the outer ring surface of the tube bending mold 4, and the tube bending mold 4 will be driven to produce a slight vibration. The slight vibration can help the core to better adjust its position during the insertion process of the mold, so that the core can accurately reach the predetermined position, and the material inside the tube bending mold 4 can also be evenly distributed;

[0039] Next, in order to realize the limited bending tube mold 4, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 6, the swing limiting structure 600 includes a return spring 602, the return spring 602 is fixedly connected to a slide groove provided on the surface of the workbench 1, a first sliding plate 601 is fixedly connected to the side of the return spring 602, the first sliding plate 601 is slidably connected to the slide groove provided on the surface of the workbench 1, the surface of the first sliding plate 601 is rotatably connected to the first swing plate 603 through a pin, the surface of the first swing plate 603 is rotatably connected to the first limiting shaft 604, the bottom of the first limiting shaft 604 is fixedly connected to the workbench 1, the side of the first swing plate 603 away from the first sliding plate 601 is movably connected to the second sliding plate 605, the surface of the second sliding plate 605 is slidably connected to the first limiting plate 606, the first limiting plate 606 is fixedly connected to the surface of the workbench 1, and the side of the second sliding plate 605 away from the first swing plate 603 is fixedly connected to the first U-shaped plate 607;

[0040] Since the first blade plate 504, the second blade plate 505 and the third blade plate 506 are of low-order type, when the first blade plate 504, the second blade plate 505 and the third blade plate 506 swing around the center of the rotating disk 502, the first sliding plate 601 can be gradually driven to slide in the sliding groove opened on the surface of the workbench 1, and then the return spring 602 is driven to be compressed. When the first sliding plate 601 slides, the first swinging plate 603 is driven to swing around the center of the first limiting shaft 604, and then the second sliding plate 605 is driven to slide inside the first limiting plate 606, so that the first U-shaped plate 607 fixedly connected to the side of the second sliding plate 605 slides on the outer annular surface of the bending mold 4, so that the bending mold 4 can be limited at different positions to prevent the core from being unable to be accurately inserted;

[0041] In order to wipe the elbow core before inserting it into the pipe bending mold 4, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 7 The wiping structure 700 includes a second limiting shaft 702, the bottom of the second limiting shaft 702 is fixedly connected to the workbench 1, the outer ring surface of the second limiting shaft 702 is rotatably connected to the second swing plate 701, the side of the second swing plate 701 close to the first sliding plate 601 is rotatably connected through a pin, the side of the second swing plate 701 away from the first sliding plate 601 is movably connected to the third sliding plate 704, the surface of the third sliding plate 704 is slidably connected to the second limiting plate 705, the bottom of the second limiting plate 705 is fixedly connected to the workbench 1, and the side of the third sliding plate 704 away from the second swing plate 701 is fixedly connected to an inverted U plate 706;

[0042] When the first sliding plate 601 slides in the slide groove opened on the surface of the workbench 1, the second swing plate 701 is synchronously driven to swing around the center of the second limiting shaft 702, and then the wiping plate 703 is driven to swing close to the first hydraulic structure 2, and the first hydraulic structure 2 is limited to insert the core inside the bending mold 4. Then, when the first hydraulic structure 2 is inserted into the bending mold 4, the wiping plate 703 can wipe the surface of the first hydraulic structure 2, so that the core can be cleaned before being inserted into the bending mold 4, so as to prevent dust from sticking to the surface of the bending mold 4 and affecting the subsequent production of the bending mold 4.

[0043] Next, in order to achieve the cooling of the outer ring surface of the bending tube mold 4 by blowing air when the core is pulled out, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 4 , a plurality of groups of air holes are respectively arranged on the surfaces of the first blade plate 504, the second blade plate 505 and the third blade plate 506, the first blade plate 504 is longer than the second blade plate 505, the second blade plate 505 is longer than the third blade plate 506, the third blade plate 506 is fixedly connected to the rotating shaft 501, and the second blade plate 505 is slidably connected to the first blade plate 504;

[0044] After the tube bending mold 4 is completed and needs to be demoulded, the staff drives the first hydraulic structure 2 and the second hydraulic structure 3 in reverse, so that the first hydraulic structure 2 and the second hydraulic structure 3 are pulled out from the inside of the tube bending mold 4. During the pulling out process, the first hydraulic structure 2 drives the rotating disk 502 to rotate in reverse, so that the rotating shaft 501 also rotates in reverse synchronously, and then the reverse rotation of the rotating shaft 501 drives the third fan blade plate 506 to reset and rotate around the center of the rotating shaft 501, and then drives the third fan blade plate 506 to slide and compress inside the second fan blade plate 505, so that gas is generated inside the second fan blade plate 505 and sprayed from the opened air holes to the outer annular surface of the tube bending mold 4, so that the outer annular surface of the tube bending mold 4 can be blown and cooled, and the heat is blown and cooled synchronously following the movement of the first hydraulic structure 2 inside the tube bending mold 4, so as to prevent the heat generated by the friction of the first hydraulic structure 2 inside the tube bending mold 4 from affecting the production of the material;

[0045] Next, in order to realize the movement of the swing limiting structure 600 to the middle of the tube bending mold 4 for limiting, the following specific structure needs to be disclosed in detail, please refer to Figures 1 to 7, the first sliding plate 601 is arranged in an arc shape near the heat dissipation vibration structure 500, the return spring 602 connected to the bottom of the first sliding plate 601 is provided with a damping rod, the first swing plate 603 connected to the surface of the first sliding plate 601 through a pin is arranged in a rectangular shape, the second sliding plate 605 movably connected to the first swing plate 603 away from the side of the first sliding plate 601 is arranged in a rectangular shape, the first U-shaped plate 607 fixedly connected to the surface of the second sliding plate 605 is arranged in a U shape, and is mutually adapted to the bending tube mold 4, and the first U-shaped plate 607 is made of soft material;

[0046] When the first blade plate 504, the second blade plate 505 and the third blade plate 506 are gradually reset, the reset spring 602 releases the pressure and drives the first sliding plate 601 to move in the direction of the heat dissipation vibration structure 500, and then drives the first swing plate 603 to swing around the center of the first limiting axis 604 in the direction away from the heat dissipation vibration structure 500, so that the second sliding plate 605 movably connected to the side of the first swing plate 603 slides inside the first limiting plate 606, and then drives the first U-shaped plate 607 to slide on the outer annular surface of the bending mold 4 and change the limiting position. Because the bending mold 4 will be subject to resistance when the core is pulled out, it may cause the bending mold 4 to produce excessive shaking or move with the core. Therefore, the first U-shaped plate 607 can be limited at the bend of the bending mold 4, thereby preventing the bending mold 4 from moving with the core;

[0047] In order to achieve better positioning and wiping of the elbow core by the wiping structure 700, the following specific structures need to be disclosed in detail. Please refer to Figures 1 to 7 , a plurality of groups of wave blocks are arranged on the surface of the third sliding plate 704, the wave blocks arranged on the surface of the third sliding plate 704 are adapted to each other with the wave blocks arranged on the side of the first hydraulic structure 2, the third sliding plate 704 is adapted to each other inside the second limiting plate 705, and the inverted U plate 706 fixedly connected to the side of the third sliding plate 704 is adapted to each other with the first hydraulic structure 2;

[0048] When the first sliding plate 601 is reset and moved, the second swinging plate 701 is synchronously driven to swing around the center of the second limiting axis 702 in the direction away from the heat dissipation vibration structure 500, and then the third sliding plate 704 is submerged to slide inside the second limiting plate 705, so that the wave blocks arranged on the surface of the third sliding plate 704 contact with the wave blocks arranged on the side of the first hydraulic structure 2, thereby causing the first hydraulic structure 2 to vibrate, and then preventing the surface from sticking to the material when pulling out the first hydraulic structure 2, and generating vibration inside the bending tube mold 4, which can accelerate the separation process of the core and the mold, thereby shortening the demolding time and improving production efficiency.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipe bending automatic rotating core-pulling demoulding mold, comprising a workbench (1), characterized in that: The surface of the workbench (1) is respectively provided with a first hydraulic structure (2) and a second hydraulic structure (3); a tube bending mold (4) is detachably mounted on the surface of the workbench (1); a heat dissipation vibration structure (500) for dissipating heat from the tube bending mold (4) by vibration is provided in the middle of the workbench (1); a swing limiting structure (600) for limiting the position of the tube bending mold (4) is provided on the side of the heat dissipation vibration structure (500); and a wiping structure (700) for wiping the first hydraulic structure (2) and the second hydraulic structure (3) is provided on the side of the heat dissipation vibration structure (500) away from the swing limiting structure (600); When inserting the core, the first hydraulic structure (2) and the second hydraulic structure (3) are driven to insert the core into the tube bending mold (4), and the heat dissipation vibration structure (500) is driven to open to vibrate the tube bending mold (4), and then the swing limit structure (600) is driven to swing inwards, and the swing limit structure (600) of the limit tube bending mold (4) is moved to the entrance of the insertion core to limit the position, and then the wiping structure (700) is driven to swing to wipe the outer annular surface of the core; When the core is pulled out, the first hydraulic structure (2) and the second hydraulic structure (3) are driven in reverse to pull out the core respectively, driving the heat dissipation vibration structure (500) to close and generate gas to blow air to the outer ring surface of the pipe bending mold (4) for heat dissipation, then driving the swing limit structure (600) to swing outward, moving the swing limit structure (600) of the limit pipe bending mold (4) to the middle limit of the pipe bending mold (4), and then driving the wiping structure (700) to swing and generate vibration; The heat dissipation vibration structure (500) comprises a rotating shaft (501), the rotating shaft (501) passes through and is rotatably connected inside the workbench (1), one end of the rotating shaft (501) close to the surface of the workbench (1) is fixedly connected to a rotating disk (502), the side of the rotating disk (502) is fixedly connected to the second hydraulic structure (3), the side of the rotating disk (502) is movably connected to a driving plate (503), the surface of the workbench (1) is fixedly connected to a first blade plate (504), the inside of the first blade plate (504) is slidably connected to a second blade plate (505), the inside of the second blade plate (505) is slidably connected to a third blade plate (506), and the surfaces of the first blade plate (504), the second blade plate (505) and the third blade plate (506) are respectively fixedly connected to protrusions (507); The swing limiting structure (600) comprises a return spring (602), the return spring (602) being fixedly connected to a slide groove provided on the surface of the workbench (1), a first sliding plate (601) being fixedly connected to a side of the return spring (602), the first sliding plate (601) being slidably connected to the slide groove provided on the surface of the workbench (1), a first swing plate (603) being rotatably connected to the surface of the first sliding plate (601) via a pin, and a first limit shaft being rotatably connected to the surface of the first swing plate (603) (604), the bottom of the first limiting shaft (604) is fixedly connected to the workbench (1), the side of the first swing plate (603) away from the first sliding plate (601) is movably connected to the second sliding plate (605), the surface of the second sliding plate (605) is slidably connected to the first limiting plate (606), the first limiting plate (606) is fixedly connected to the surface of the workbench (1), and the side of the second sliding plate (605) away from the first swing plate (603) is fixedly connected to the first U-shaped plate (607); The wiping structure (700) comprises a second limiting shaft (702), the bottom of the second limiting shaft (702) is fixedly connected to the workbench (1), the outer ring surface of the second limiting shaft (702) is rotatably connected to a second swing plate (701), the side of the second swing plate (701) close to the first sliding plate (601) is rotatably connected via a pin, the side of the second swing plate (701) away from the first sliding plate (601) is movably connected to a third sliding plate (704), the surface of the third sliding plate (704) is slidably connected to a second limiting plate (705), the bottom of the second limiting plate (705) is fixedly connected to the workbench (1), the side of the third sliding plate (704) away from the second swing plate (701) is fixedly connected to an inverted U plate (706), and the side of the second swing plate (701) is fixedly connected to a wiping plate (703).

2. The automatic rotating core-pulling demoulding mold for bent pipe according to claim 1, characterized in that: The first hydraulic structure (2) arranged on the surface of the workbench (1) is used for pulling out the straight core, and the second hydraulic structure (3) also arranged on the surface of the workbench (1) is used for pulling out the elbow core.

3. The automatic rotating core-pulling demoulding mold for bent pipe according to claim 1, characterized in that: A plurality of groups of air holes are respectively arranged on the surfaces of the first blade plate (504), the second blade plate (505) and the third blade plate (506); the first blade plate (504) is longer than the second blade plate (505); the second blade plate (505) is longer than the third blade plate (506); the third blade plate (506) is fixedly connected to the rotating shaft (501); and the second blade plate (505) is slidably connected to the first blade plate (504).

4. The automatic rotating core-pulling demoulding mold for bent pipe according to claim 3, characterized in that: The first sliding plate (601) is arranged in an arc shape in the direction close to the heat dissipation vibration structure (500); a return spring (602) connected to the bottom of the first sliding plate (601) is provided with a damping rod; a first swing plate (603) connected to the surface of the first sliding plate (601) via a pin is arranged in a rectangular shape; a second sliding plate (605) movably connected to the first swing plate (603) away from the first sliding plate (601) is arranged in a rectangular shape; a first U-shaped plate (607) fixedly connected to the surface of the second sliding plate (605) is arranged in a U shape and is mutually adapted to the tube bending mold (4); and the first U-shaped plate (607) is made of soft material.

5. The automatic rotating core-pulling demoulding mold for bent pipe according to claim 4, characterized in that: The surface of the third sliding plate (704) is provided with a plurality of groups of wave blocks, the wave blocks provided on the surface of the third sliding plate (704) are mutually adapted to the wave blocks provided on the side of the first hydraulic structure (2), the third sliding plate (704) is mutually adapted to the inside of the second limit plate (705), and the inverted U-plate (706) fixedly connected to the side of the third sliding plate (704) is mutually adapted to the first hydraulic structure (2).

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