Corrugated pipe forming die

Abstract

The utility model discloses a corrugated pipe forming die which comprises a left die assembly and a right die assembly which are the same in structure, each of the left die assembly and the right die assembly comprises a driving wheel, a driven wheel and a transmission belt arranged on the outer surface of the driving wheel and the outer surface of the driven wheel in a sleeving mode, and two sets of modules are evenly distributed on the outer surface of each transmission belt. Each module is composed of two flaring modules and a plurality of modules, and when the modules of the left die assembly and the right die assembly are combined, a corrugated pipe forming cavity is formed; corrugated grooves are formed in the inner sides of the modules, hooking pieces are arranged on the outer sides of the modules, positioning grooves matched with the hooking pieces of the modules are formed in the transmission belt, the modules are fixed to the transmission belt through the hooking pieces, and the lower end of the transmission belt is fixed to the modules through screws, so that connection between the modules and the transmission belt is firmer; two corrugated pipes can be produced by rotating the forming die for one circle, and during continuous production, the flaring ends of the produced corrugated pipes are connected, and the tail ends of the produced corrugated pipes are connected, so that the change of the extrusion amount of equipment is reduced, and the product forming rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a bellows forming mold. Background Art

[0002] The main raw material of corrugated pipes is high-density polyethylene plastic. This material has strong corrosion resistance and a very long service life. During the production process, the prepared polyethylene plastic and some additives are put together, and then sent into the machine to be fully stirred and mixed. The mixed raw materials are sent to the extruder and heated to 230 degrees Celsius to melt the plastic particles and squeeze out a viscous liquid. The extruder head is inserted into the mold cavity. With the closing of each set of molds, a molding cavity for the corrugated pipe is formed. The extruder injects the molten polyethylene plastic into the mold, and the solution will quickly fill the corrugated groove of the mold. As the mold moves forward, the cooling system in the mold will allow the corrugated pipe to harden and form. Each pair of molds will automatically open the demolding, and the mold moves forward to continue the cycle of molding the corrugated pipe.

[0003] The existing bellows forming mold can only produce one bellows per one rotation. During continuous production, a length of useless pipe section will be generated between the bellows, resulting in certain production waste. In addition, the existing mold is inconvenient to install and is prone to swinging. When the bellows forming mold moves forward to close the mold for extrusion molding, the two closed molds are prone to shifting or swinging, resulting in unstable mold closing, which in turn affects the efficiency of bellows extrusion molding. Summary of the invention

[0004] The utility model provides a corrugated pipe forming mold. The mold can form two corrugated pipes in one rotation. During continuous production, the flared ends of the corrugated pipes are connected to each other, and the tail ends are connected to each other, which eliminates the unnecessary loss of the corrugated pipe production and improves the production efficiency. The mold is easy, fast and firm to install. The specific technical scheme is as follows:

[0005] A bellows forming mold, comprising: a left mold assembly and a right mold assembly with the same structure, characterized in that: the left mold assembly and the right mold assembly both comprise a driving wheel, a driven wheel and a transmission belt sleeved on the outer surfaces of the driving wheel and the driven wheel, the outer surface of the transmission belt is evenly distributed with a plurality of modules, the modules evenly distributed on the outer surface of the transmission belt are divided into two groups, and each group of modules is composed of two flaring modules and a plurality of modules, and the modules of the left mold assembly and the right mold assembly form a bellows forming cavity when combined; a corrugated groove is provided on the inner side of the module, a hanging piece is provided on the outer side of the module, a positioning groove matched with the hanging piece of the module is provided on the transmission belt, the module is fixed to the transmission belt through the hanging piece, and the lower end of the transmission belt is fixed to the module by screws, so that the connection between the module and the transmission belt is more firm.

[0006] Furthermore, a threaded through hole is provided at the lower end of the transmission belt, and a threaded hole corresponding to the threaded through hole of the transmission belt is provided at the lower end of the module, and a screw passes through the transmission belt and is connected to the module.

[0007] Furthermore, a countersunk hole is provided at the end of the threaded through hole of the transmission belt, and the countersunk hole matches with the nut of the screw, and the nut of the screw is placed in the countersunk hole of the transmission belt.

[0008] Furthermore, the driving wheels of the left mold assembly and the right mold assembly are respectively connected to motors, and the motors drive the driving wheels to rotate, thereby driving the transmission belt to operate.

[0009] Furthermore, the driving wheel and the driven wheel are polygonal columnar structures.

[0010] The utility model has a simple structure and an ingenious design. The forming mold can produce two corrugated pipes in one rotation. During continuous production, the flared ends of the produced corrugated pipes are connected to each other, and the tail ends are connected to each other, which reduces the change in the extrusion volume of the equipment and improves the product forming rate. At the same time, it can eliminate the unnecessary loss of the corrugated pipe production and improve production efficiency. The mold is fixed to the transmission belt by a hanging piece and screws, and the connection is convenient, fast and firm, which solves the problem that the mold of the prior art is prone to displacement or swinging when the mold is closed, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the bellows after forming of the utility model;

[0013] Figure 3 It is a schematic diagram of the left mold assembly module and the right mold assembly module of the utility model after being separated;

[0014] Figure 4 It is a front view after the module of the left mold assembly and the module of the right mold assembly of the utility model are combined;

[0015] Figure 5 It is a partial cross-sectional view of the transmission belt of the left mold assembly of the utility model;

[0016] Figure 6 It is a partial cross-sectional view of the transmission belt of the right mold assembly of the utility model;

[0017] Figure 7 It is a cross-sectional view of the left mold assembly of the utility model;

[0018] Figure 8 It is a cross-sectional view of the right mold assembly of the present utility model. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, function and specific design scheme of the utility model, the bellows forming mold of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 8 As shown, the bellows forming mold of the utility model includes a left mold assembly 1 and a right mold assembly 2. The left mold assembly 1 and the right mold assembly 2 have the same structure. The left mold assembly 1 includes a driving wheel 12, a driven wheel 13, and a transmission belt 11 mounted on the outer surface of the driving wheel 12 and the driven wheel 13. The outer surface of the transmission belt 11 is evenly distributed with a plurality of modules 14. The modules evenly distributed on the outer surface of the transmission belt 11 are divided into two groups, and each group of modules is composed of two flaring modules 14-1 and a plurality of modules 14-2. A corrugated groove 142 is provided on the inner side of the module 14, and a hanging member 141 is provided on the outer side of the module 14. A positioning groove 111 adapted to the hanging member 141 of the module 14 is provided on the transmission belt 11. The module 14 is fixed to the transmission belt 11 through the hanging member 141. In order to make the connection between the module 14 and the transmission belt 11 more firm, the lower end of the transmission belt 11 is also fixed to the module 14 through screws.

[0021] The lower end of the transmission belt 11 is provided with a threaded through hole 112, and the lower end of the module 14 is provided with a threaded hole 143 corresponding to the threaded through hole 112 of the transmission belt 11, and the screw passes through the transmission belt 11 and is connected to the module 14. In order to prevent the transmission belt 11 from being hindered by the screw during operation, a countersunk hole 113 is further provided at the end of the threaded through hole 112 of the transmission belt 11, and the countersunk hole 113 cooperates with the nut of the screw, and the nut of the screw is placed in the countersunk hole 113 of the transmission belt 11.

[0022] The right mold assembly 2 includes a driving wheel 22, a driven wheel 23, and a transmission belt 21 mounted on the outer surface of the driving wheel 22 and the driven wheel 23. The outer surface of the transmission belt 21 is evenly distributed with a plurality of modules 24. The modules evenly distributed on the outer surface of the transmission belt 21 are divided into two groups, and each group of modules is composed of two flaring modules 24-1 and a plurality of modules 24-2. A corrugated groove 242 is provided on the inner side of the module 24, and a hanging member 241 is provided on the outer side of the module 24. A positioning groove 211 adapted to the hanging member 241 of the module 24 is provided on the transmission belt 21. The module 24 is fixed to the transmission belt 21 through the hanging member 241. In order to make the connection between the module 24 and the transmission belt 21 more firmly, the lower end of the transmission belt 21 is also fixed to the module 24 through screws.

[0023] The lower end of the transmission belt 21 is provided with a threaded through hole 212, and the lower end of the module 24 is provided with a threaded hole 243 corresponding to the threaded through hole 212 of the transmission belt 21. The screw passes through the transmission belt 21 and is connected to the module 24. In order to prevent the transmission belt 21 from being hindered by the screw during operation, a countersunk hole 213 is further provided at the end of the threaded through hole 212 of the transmission belt 21. The countersunk hole 213 cooperates with the nut of the screw, and the nut of the screw is placed in the countersunk hole 213 of the transmission belt 21.

[0024] When the modules of the left mold assembly 1 and the right mold assembly 2 are combined, a bellows forming cavity 4 is formed. The driving wheels of the left mold assembly 1 and the right mold assembly 2 are respectively connected with motors, which drive the driving wheels to rotate, thereby driving the transmission belt to operate.

[0025] The driving wheel and the driven wheel of the utility model are polygonal columnar structures.

[0026] When in use, the left mold assembly 1 and the right mold assembly 2 are arranged at the front end of the extruder, and the extruder is used for extrusion. The two motors are started to synchronously drive the driving wheels 12 and 22 to rotate, so that the two transmission belts 11 and 21 run synchronously, and drive the plurality of molds 14 and 24 thereon to rotate forward, and close the mold to extrude the material. The mold is firmly connected to the transmission belt, which can ensure the stability of the mold of the left mold assembly 1 and the mold of the right mold assembly 2 when closing the mold, and avoid the mold of the left mold assembly 1 and the mold of the right mold assembly 2 from accidentally shifting or swinging when moving forward, thereby improving the positioning accuracy, and then the corrugated pipe can be quickly extruded to form a formed corrugated pipe.

[0027] The modules of the outer surface of the transmission belt of the left mold assembly 1 and the right mold assembly 2 are designed as two groups, and each group of modules is composed of two expansion modules and several modules (see Figure 7 , Figure 8 ), so that the corrugated pipe forming mold can produce two corrugated pipes in one rotation. During continuous production, the flared ends of the produced corrugated pipes are connected to the flared ends, and the tail ends are connected to the tail ends. This can reduce the change of the equipment's extrusion volume and improve the product forming rate. At the same time, it can eliminate the unnecessary loss of corrugated pipe production and improve production efficiency.

[0028] The molds of the left mold assembly 1 and the right mold assembly 2 are fixed to the transmission belt through hanging parts and screws. The connection is convenient, fast and firm, which solves the problem that the molds in the prior art are prone to shifting or swinging when closing the molds, thereby improving production efficiency.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A corrugated pipe forming die, comprising a left die assembly and a right die assembly of the same structure, characterized in that: Both the left mold assembly and the right mold assembly include a driving wheel, a driven wheel and a transmission belt mounted on the outer surfaces of the driving wheel and the driven wheel. The outer surface of the transmission belt is evenly distributed with a number of modules. The modules evenly distributed on the outer surface of the transmission belt are divided into two groups, and each group of modules is composed of two expansion modules and a number of modules. When the modules of the left mold assembly and the right mold assembly are merged, a bellows forming cavity is formed; a corrugated groove is provided on the inner side of the module, a hanging part is provided on the outer side of the module, and a positioning groove matched with the hanging part of the module is provided on the transmission belt. The module is fixed to the transmission belt through the hanging part, and the lower end of the transmission belt is fixed to the module by screws, so that the connection between the module and the transmission belt is more secure.

2. The corrugated pipe forming die according to claim 1, characterized in that: A threaded through hole is arranged at the lower end of the transmission belt, and a threaded hole corresponding to the threaded through hole of the transmission belt is arranged at the lower end of the module, and a screw passes through the transmission belt and is connected to the module.

3. The corrugated pipe forming die according to claim 2, characterized in that: The end of the threaded through hole of the transmission belt is provided with a countersunk hole, which matches with the nut of the screw, and the nut of the screw is placed in the countersunk hole of the transmission belt.

4. The corrugated pipe forming die according to claim 1, characterized in that: The driving wheels of the left mold assembly and the right mold assembly are respectively connected with motors, and the motors drive the driving wheels to rotate, thereby driving the transmission belt to operate.

5. The corrugated pipe forming die according to claim 1 or 4, characterized in that: The driving wheel and the driven wheel are polygonal columnar structures.

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