PVC elbow forming die

Abstract

The utility model discloses a PVC elbow pipe forming die, including base, be equipped with on base: mould assembly, it includes the lower mould seat of installation on the base, is installed with the upper mould seat at the top of lower mould seat, is set up between lower mould seat and upper mould seat and has a plurality of groups elbow pipe forming runner, is placed in the adjusting assembly of mould assembly both sides, and each adjusting assembly all includes support plate, flared front correction telescopic power mechanism, flared front correction spare, flared rear correction telescopic power mechanism and flared rear correction spare, support plate sliding installation is on the base, flared front correction telescopic power mechanism horizontal installation is on support plate, through setting in the adjusting assembly of mould assembly both sides, has integrated pipe material positioning correction and flared forming function, can continuously complete elbow pipe standardization, port correction and flared operation on a station, thoroughly dispensed with secondary handling and special flared process, greatly improved production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, specifically a PVC pipe bending forming mold. Background Technology

[0002] Polyvinyl chloride (PVC) bends are widely used in building drainage, electrical wiring, and other fields. Their production process typically involves placing a heated and softened PVC pipe blank into a forming mold, and then cooling and shaping it to obtain the desired bend. However, existing bend forming technologies, especially when producing multiple parallel bends, often face the following technical challenges: First, during the process of placing the pipe blank into the mold and removing the finished product, it is highly susceptible to deformation and scratches due to external forces or its own weight, affecting the product's appearance quality and dimensional accuracy. Second, for bends requiring flaring (such as socket elbows for drainage), traditional production methods often require transferring the pipe to specialized flaring equipment for secondary processing after the pipe has been shaped. This secondary processing not only increases production steps and equipment costs and reduces production efficiency, but also easily damages the already formed bend during transfer and secondary clamping, resulting in a low yield. Furthermore, traditional molds have limited functionality, low automation, and heavy reliance on manual operation, making it difficult to meet the requirements of modern production for high efficiency, high quality, and consistency.

[0003] Therefore, there is an urgent need for a PVC pipe bending mold that integrates pipe bending, straightening and flaring functions, has a high degree of automation, and can significantly improve production efficiency and product quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a PVC pipe bending forming mold that integrates automated straightening and flaring straightening, which addresses the shortcomings of the existing technology.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution: a PVC pipe bending forming mold, including a base, on which are provided: The mold assembly includes a lower mold base mounted on a base, an upper mold base mounted on top of the lower mold base, and several sets of bent tube forming channels opened between the lower mold base and the upper mold base; The adjustment assemblies located on both sides of the mold assembly each include a support plate, a pre-flaring straightening telescopic power mechanism, a pre-flaring straightening component, a post-flaring straightening telescopic power mechanism, and a post-flaring straightening component. The support plate is slidably mounted on the base. The pre-flaring straightening telescopic power mechanism is horizontally mounted on the support plate. One end of the pre-flaring straightening component is fixed to the telescopic end of the pre-flaring straightening telescopic power mechanism, and the other end faces one side of the bending tube forming flow channel. The post-flaring straightening telescopic power mechanism is fixed on the top surface of the support plate. One end of the post-flaring straightening component is fixed to the telescopic end of the post-flaring straightening telescopic power mechanism, and the other end faces one side of the bending tube forming flow channel.

[0006] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above, wherein the bottom surface of the lower mold base is vertically fixed on the top surface of the middle part of the base, and bolt holes for mutual fixing are provided between the upper mold base and the lower mold base.

[0007] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above has several sets of pipe bending forming channels spaced apart. Each set of pipe bending forming channels is composed of two semi-circular arc grooves, which are respectively opened on the top surface of the lower mold base and the bottom surface of the upper mold base.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above, wherein the upper mold base and the lower mold base are provided with several water-cooling channels.

[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above, wherein the pre-flaring straightening component includes a connecting rod and several straightening plates. One end of the connecting rod is coaxially fixed on the telescopic end of the pre-flaring straightening telescopic power mechanism, and the other end is vertically fixed to the straightening plate. The side of the straightening plate facing the pipe bending forming channel is the straightening front side, which is directly opposite the port of the pipe bending forming channel and flush with the port.

[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the number of the straightening plates in the PVC pipe bending forming mold described above corresponds one-to-one with the number of pipe bending forming channels.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above, wherein the flaring and straightening component includes a connecting frame and several flaring devices. One end of the connecting frame is fixed to the telescopic end of the flaring and straightening telescopic power mechanism, and the other end is fixedly connected to the end of the flaring device. The other end of the flaring device faces the pipe bending forming flow channel and is provided with a conical surface for flaring and straightening.

[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: In the PVC pipe bending forming mold described above, the axis of the flaring device is parallel to the axis of the pipe bending forming flow channel port.

[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the PVC pipe bending forming mold described above, wherein the flaring correction telescopic power mechanism and the flaring device are inclined.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the number of flaring devices in the PVC pipe bending forming mold described above corresponds one-to-one with the number of pipe bending forming channels.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are: (1) By setting the adjustment assembly on both sides of the mold assembly, the pipe positioning and straightening and flaring functions are integrated. The bending, straightening and flaring operations can be completed continuously in one station, completely eliminating the need for secondary handling and special flaring processes, and greatly improving production efficiency.

[0016] (2) The pre-flaring straightening part can center and position the tube blank when it enters the mold to prevent the tube opening from being skewed; the post-flaring straightening part can directly flare after shaping, ensuring the consistency and roundness of the flaring size, while avoiding surface scratches and deformation that may be caused by manual handling and secondary processing, significantly improving the dimensional accuracy and appearance quality of the product and reducing the scrap rate.

[0017] (3) The support plate is slidably installed on the base, so that the entire adjustment assembly can adjust its relative position with the mold assembly according to the size requirements of different bent pipe products, which enhances the versatility of the mold and can quickly adapt to the production needs of different specifications of products.

[0018] (4) Water-cooled flow channels are opened in both the upper and lower mold bases to ensure that the bent tube can be cooled and shaped quickly and evenly in the forming flow channel, which further guarantees the shape stability and mechanical properties of the product. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Base; 2. Lower mold base; 3. Upper mold base; 4. Bending tube forming flow channel; 5. Support plate; 6. Correction and telescopic power mechanism before flaring; 7. Correction and telescopic power mechanism after flaring; 8. Bolt hole; 9. Water-cooled flow channel; 10. Connecting rod; 11. Correction plate; 12. Correction front; 13. Connecting frame; 14. Flaring device. Detailed Implementation

[0021] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0022] Example 1, referring to Figure 1-2 A PVC pipe bending forming mold includes a base 1, which is formed into a generally square base 1, with its bottom surface in contact with the ground. The base 1 is provided with: The mold assembly includes a lower mold base 2 mounted on a base 1, an upper mold base 3 mounted on top of the lower mold base 2, and several sets of bent tube forming channels 4 opened between the lower mold base 2 and the upper mold base 3. The multiple sets of bent tube forming channels 4 are horizontally arranged between the upper mold base 3 and the lower mold base 2, and their number can be selected according to the usage requirements. The adjustment assemblies located on both sides of the mold assembly each include a support plate 5, a pre-flaring correction telescopic power mechanism 6, a pre-flaring correction component, a post-flaring correction telescopic power mechanism 7, and a post-flaring correction component. The support plate 5 is slidably mounted on the base 1, specifically through a linear guide rail as used in the prior art. The support plate 5 is formed into a roughly square plate structure and is vertically arranged. The pre-flaring correction telescopic power mechanism 6 is horizontally mounted on the support plate 5. The pre-flaring correction telescopic power mechanism 6 can be a cylinder. One end of the pre-flaring correction component is fixed to the telescopic end of the pre-flaring correction telescopic power mechanism 6, and the other end faces one side of the bending tube forming channel 4. The post-flaring correction telescopic power mechanism 7 is fixed on the top surface of the support plate 5. The post-flaring correction telescopic power mechanism 7 can be a hydraulic cylinder. One end of the post-flaring correction component is fixed to the telescopic end of the post-flaring correction telescopic power mechanism 7, and the other end faces one side of the bending tube forming channel 4.

[0023] In Example 1, the pre-flaring correction telescopic power mechanism 6 can be linked with the pre-flaring correction component to squeeze and correct the end of the bent tube in the bending tube forming channel 4. This correction is a fine adjustment of the angle of the bent tube end. The post-flaring correction telescopic power mechanism 7 can extend the post-flaring correction component into the bending tube forming channel 4 to perform a certain degree of flaring correction on the inner circumferential surface of the bent tube opening, so that the inner circumferential surface of the flared opening remains as unchanged as possible.

[0024] Example 2, a PVC pipe bending forming mold as described in Example 1, wherein the bottom surface of the lower mold base 2 is vertically fixed on the top surface of the middle part of the base 1, and bolt holes 8 for mutual fixing are provided between the upper mold base 3 and the lower mold base 2.

[0025] In Example 2, the upper mold base 3 and the lower mold base 2 can be detachably installed as one unit using bolt fasteners, making installation and disassembly convenient.

[0026] Example 3, a PVC pipe bending forming mold as described in Example 1, wherein the pipe bending forming flow channel 4 is provided with several sets at intervals, and each set of pipe bending forming flow channel 4 is composed of two semi-circular arc grooves, and the two arc grooves are respectively opened on the top surface of the lower mold base 2 and the bottom surface of the upper mold base 3.

[0027] Example 4, a PVC pipe bending forming mold as described in Example 1, wherein the upper mold base 3 and the lower mold base 2 are each provided with a plurality of water-cooling channels 9, the shape and size of which can be selected according to the usage requirements.

[0028] In Example 4, the water-cooled flow channel 9 can be arranged in an arc shape. Specifically, it can be set according to the arc interval of the bending tube forming flow channel 4. The cold fluid flowing into the water-cooled flow channel 9 can cool the upper mold base 3 and the lower mold base 2, thereby achieving the cooling effect.

[0029] Example 5, a PVC pipe bending forming mold as described in Example 1, wherein the pre-flaring straightening component includes a connecting rod 10 and several straightening plates 11. The connecting rod 10 is formed as a horizontally arranged rod structure, and the straightening plates 11 are formed as horizontally arranged square plate structures. One end of the connecting rod 10 is coaxially fixed to the telescopic end of the pre-flaring straightening telescopic power mechanism 6, and the other end is vertically fixed to the straightening plate 11. The side of the straightening plate 11 facing the pipe bending forming channel 4 is the straightening face 12, and the straightening face 12 is directly opposite the port of the pipe bending forming channel 4 and is flush with the port.

[0030] In Example 5, the straightening plate 11 can be pushed by the telescopic end of the pre-flaring straightening telescopic power mechanism 6 and the connecting rod 10, thereby selectively abutting the end of the bending tube forming channel 4, thereby finely adjusting the port angle of the bending tube in the bending tube forming channel 4.

[0031] Example 6, a PVC pipe bending forming mold as described in Example 5, wherein the number of straightening plates 11 corresponds one-to-one with the number of pipe bending forming channels 4.

[0032] Example 7, a PVC pipe bending forming mold as described in Example 1, wherein the flaring and straightening component includes a connecting frame 13 and several flaring devices 14. The connecting frame 13 is formed into a roughly square frame structure, and the flaring devices 14 are formed into a roughly cylindrical structure. One end of the connecting frame 13 is fixed to the telescopic end of the flaring and straightening telescopic power mechanism 7, and the other end is fixedly connected to the end of the flaring device 14. The other end of the flaring device 14 faces the pipe bending forming flow channel 4 and is provided with a conical surface for flaring and straightening. The taper value of the conical surface can be customized according to the usage requirements.

[0033] In embodiment 7, a slide rail can be fixedly installed on the top of the support plate 5, and the flared and corrective telescopic power mechanism 7 can be fixed on the slide rail. A slider is then installed on the slide rail, and the bottom surface of the connecting frame 13 is fixed on the slider, thereby guiding the movement of the connecting frame 13.

[0034] Example 8, a PVC pipe bending forming mold as described in Example 7, wherein the axis of the flaring device 14 is parallel to the axis of the port of the pipe bending forming channel 4.

[0035] Example 9, a PVC pipe bending forming mold as described in Example 7, wherein the flaring correction telescopic power mechanism 7 and the flaring device 14 are inclined, and the inclination angle can be selected according to the usage requirements.

[0036] Example 10, a PVC pipe bending forming mold as described in Example 7, wherein the number of flaring devices 14 corresponds one-to-one with the number of pipe bending forming channels 4.

[0037] The process of using this PVC pipe bending mold is as follows: First, the heated and softened PVC pipe blank is placed into the bending forming channel 4 of the lower mold base 2 in the open state. Then, the upper mold base 3 and the lower mold base 2 are fastened together with bolts to close the mold, so that the pipe blank is wrapped in the closed forming channel. After the mold is closed, external cooling water can flow into the water cooling channel 9 inside the upper mold base 3 and the lower mold base 2 to uniformly cool the mold and make the pipe blank cool and solidify quickly in the forming channel.

[0038] During or after cooling, port straightening can be performed. The linear guide can adjust the position of the entire adjustment assembly so that the pre-flaring straightening component and the post-flaring straightening component are aligned with the port of the target bend. The pre-flaring straightening telescopic power mechanism 6 is activated, and its telescopic end pushes the straightening plate 11 forward horizontally through the connecting rod 10, so that the straightening surface 12 of the straightening plate 11 smoothly abuts against the end face of the bend, and the angle of the port that may be slightly deformed due to cooling contraction is corrected.

[0039] After the initial correction of the port, the expansion and correction telescopic power mechanism 7 is activated. Its telescopic end pushes the connecting frame 13 and the flaring device 14 installed on it to move forward along the inclined guide rail. The conical surface at the front end of the flaring device 14 is inserted into the inside of the pipe, and continues to move forward and squeeze the inner wall of the pipe, thereby completing the expansion correction and shaping operation.

[0040] The entire process is fully automated, which significantly improves production efficiency and product consistency.

Claims

1. A PVC pipe bending forming mold, characterized in that: Includes a base, on which are provided: The mold assembly includes a lower mold base mounted on a base, an upper mold base mounted on top of the lower mold base, and several sets of bent tube forming channels opened between the lower mold base and the upper mold base; The adjustment assemblies located on both sides of the mold assembly each include a support plate, a pre-flaring straightening telescopic power mechanism, a pre-flaring straightening component, a post-flaring straightening telescopic power mechanism, and a post-flaring straightening component. The support plate is slidably mounted on the base. The pre-flaring straightening telescopic power mechanism is horizontally mounted on the support plate. One end of the pre-flaring straightening component is fixed to the telescopic end of the pre-flaring straightening telescopic power mechanism, and the other end faces one side of the bending tube forming flow channel. The post-flaring straightening telescopic power mechanism is fixed on the top surface of the support plate. One end of the post-flaring straightening component is fixed to the telescopic end of the post-flaring straightening telescopic power mechanism, and the other end faces one side of the bending tube forming flow channel.

2. The PVC pipe bending forming mold according to claim 1, characterized in that: The bottom surface of the lower mold base is vertically fixed to the top surface of the middle part of the base, and bolt holes for mutual fixing are provided between the upper mold base and the lower mold base.

3. The PVC pipe bending forming mold according to claim 1, characterized in that: The tube bending forming flow channel is provided in several groups at intervals. Each group of tube bending forming flow channels is composed of two semi-circular arc grooves. The two arc grooves are respectively opened on the top surface of the lower mold base and the bottom surface of the upper mold base.

4. The PVC pipe bending forming mold according to claim 1, characterized in that: Both the upper mold base and the lower mold base are provided with several water-cooling channels.

5. A PVC pipe bending forming mold according to claim 1, characterized in that: The pre-flaring straightening component includes a connecting rod and several straightening plates. One end of the connecting rod is coaxially fixed to the telescopic end of the pre-flaring straightening telescopic power mechanism, and the other end is vertically fixed to the straightening plate. The side of the straightening plate facing the bending tube forming channel is the straightening face, which is flush with the port of the bending tube forming channel.

6. A PVC pipe bending forming mold according to claim 5, characterized in that: The number of the straightening plates corresponds one-to-one with the number of the bending tube forming channels.

7. A PVC pipe bending forming mold according to claim 1, characterized in that: The flaring and straightening component includes a connecting frame and several flaring devices. One end of the connecting frame is fixed to the telescopic end of the flaring and straightening telescopic power mechanism, and the other end is fixedly connected to the end of the flaring device. The other end of the flaring device faces the bending tube forming channel and is provided with a conical surface for flaring and straightening.

8. A PVC pipe bending forming mold according to claim 7, characterized in that: The axis of the flaring device is parallel to the axis of the bend forming flow channel port.

9. A PVC pipe bending forming mold according to claim 7, characterized in that: The flaring correction telescopic power mechanism and the flaring device are tilted.

10. A PVC pipe bending forming mold according to claim 7, characterized in that: The number of flaring devices corresponds one-to-one with the number of bending forming channels.

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