A shaping die for wear-resistant double-wall corrugated pipe

Abstract

The utility model discloses a shaping mold for a wear-resistant double-walled corrugated pipe, and relates to the technical field of corrugated pipe processing. The utility model includes a lower mold, an upper mold and an air outlet nozzle. An upper mold is arranged on the top of the lower mold. End covers are fixed at both ends of the upper mold and the lower mold. A fixing seat is fixed at one side of the outer surface of the lower mold. A push switch is fixed at the top center of the fixing seat. An air outlet nozzle is fixedly connected to the end cover at one end of the upper mold. The utility model solves the problem that the shaping process of the wear-resistant double-walled corrugated pipe is easily affected by stress during vacuum shaping, resulting in non-standard size, and the corrugated pipe needs a long time to dissipate heat after production before transportation, which affects production efficiency. The utility model has the advantages of: the corrugated pipe is formed by adopting positive pressure to reduce stress after production, and the corrugated pipe is dissipated during production, reducing the time required for heat dissipation.

Description

Technical Field

[0001] The utility model belongs to the technical field of bellows processing, in particular to a shaping die for a wear-resistant double-walled bellows. Background Art

[0002] Wear-resistant double-wall corrugated pipe is a specially designed pipe material. It usually consists of two layers of corrugated structure. There may be other material layers between the inner and outer layers to enhance specific properties, such as wear resistance and corrosion resistance. This pipe has high strength and flexibility due to its unique structure. It is suitable for a variety of underground transportation systems, especially in environments that need to withstand certain mechanical wear or chemical erosion. In production, in order to produce double-wall corrugated pipes, it is necessary to shape the corrugated pipe through a mold so that it will be corrugated in cross section after being cut along the axial direction. However, it still has the following disadvantages in actual use:

[0003] 1. During the shaping process of the wear-resistant double-wall corrugated pipe, the corrugated pipe is directly put into the mold, and then the outer peripheral surface of the corrugated pipe is vacuumed to form the corrugated pipe. However, during the shaping process, the wet pipe blank is pulled into shape by the external vacuum suction force. After shaping, it is subjected to stress and is easy to shrink, resulting in non-standard production size;

[0004] 2. During the shaping process of the wear-resistant double-wall corrugated pipe, the corrugated pipe is taken out of the mold after shaping. At this time, the temperature of the corrugated pipe is still high. When the corrugated pipe is transported to the next processing equipment after being output, the surface of the corrugated pipe is easily deformed by pressure, which affects the convenience of transportation between shaping and the next processing. Therefore, it is necessary to wait for heat dissipation to reduce deformation during transportation, thereby increasing production time and reducing production efficiency. Utility Model Content

[0005] The utility model aims to provide a shaping mold for a wear-resistant double-wall corrugated pipe. By setting a lower mold, an upper mold and an air outlet nozzle, the utility model solves the problem that the wear-resistant double-wall corrugated pipe is easily affected by stress during vacuum shaping, resulting in non-standard dimensions, and that it takes a long time to dissipate heat for transportation after production, which affects production efficiency.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a shaping die for a wear-resistant double-wall corrugated pipe, comprising a lower die, an upper die and an air outlet nozzle, wherein an upper die is arranged on the top of the lower die, end covers are fixed at both ends of the upper die and the lower die, a fixing seat is fixed at a side edge of the outer surface of the lower die, a push switch is fixed at the top center of the fixing seat, and an air outlet nozzle is fixedly connected to the end cover at one end of the upper die. When working, after the lower die and the upper die are combined together, two mutually symmetrical mold cores are combined together, and a pipe blank is restricted in the space between the two mold cores, and excessive air in the pipe blank is discharged through the air outlet nozzle, so as to ensure that the pressure in the pipe blank is not too large, take away the heat of the pipe blank, and accelerate the solidification of the pipe blank.

[0008] Furthermore, mold cores are fixed on the inner walls of the lower mold and the upper mold, and the mold cores in the lower mold and the upper mold are symmetrical to each other. The lower mold and the upper mold hold the tube blank through the mold core and then form it.

[0009] Furthermore, a ventilation pipe is fixed through the end cover of one end of the lower mold, and the ventilation pipe is arranged at the end of the lower mold away from the air outlet nozzle. An electric control valve is fixed on the surrounding side of the ventilation pipe. The lower mold transports high-pressure air to the tube blank in the mold core through the ventilation pipe, and the on and off is controlled by the electric control valve.

[0010] Furthermore, a pressure plate is fixedly connected to the outer surface of the upper mold symmetrically with the fixed seat, a connecting plate is fixed to the upper part of the outer surface of the upper mold, and an electric push rod is symmetrically fixed to the top of the connecting plate. After the upper mold is pressed onto the fixed seat by the pressure plate, the push switch on the fixed seat is pressed down, and the connecting plate is driven by the electric push rod to press the upper mold downward.

[0011] Furthermore, a piston sleeve is fixed to one end of the inner wall of the air outlet nozzle close to the upper mold, an inner piston is sleeved inside the piston sleeve, and the air outlet nozzle sleeves the inner piston therein through the piston sleeve.

[0012] Furthermore, a compression spring is fixed to the end of the inner piston away from the upper mold, a telescopic rod is fixed through the end of the air outlet nozzle away from the lower mold, the telescopic end of the telescopic rod is fixed to the end of the inner piston in the compression spring, and air outlet holes are opened in a circular array on the outer side of the end of the piston sleeve away from the upper mold. When the inner piston is subjected to increased air pressure, it moves to separate from the piston sleeve, so that the high-pressure air in the tube blank enters the air outlet nozzle and is discharged through the air outlet.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model solves the problem that the wear-resistant double-wall corrugated pipe is easily affected by stress during vacuum shaping, resulting in non-standard size by setting a lower mold and an upper mold. After the upper mold and the lower mold are combined, the tube blank is restricted between the two mold cores. At this time, after the outer pressure plate of the upper mold is pressed onto the push switch on the fixed seat, the push switch is pressed down, and after the electric control valve is started, high-pressure air is transported to the tube blank through the ventilation pipe, blowing the tube blank so that the tube blank is squeezed onto the two mold cores. After the air pressure rises to a suitable pressure, the tube blank is formed. The corrugated pipe is formed by adopting positive pressure, which reduces post-production stress.

[0015] 2. The utility model solves the problem that it takes a long time for the bellows to dissipate heat after production and then transport it to improve production efficiency by setting a lower mold, an upper mold and an air outlet nozzle. After the tube blank between the two mold cores is deformed under pressure to fit the inner wall of the mold core, high-pressure gas is still transported into the tube blank, and the pressure in the tube blank increases, pushing the inner piston away from the upper mold, pushing the compression spring in the upper mold, and stabilizing the direction of movement by the telescopic rod until the inner piston and the piston sleeve are separated. The high-pressure gas in the molded bellows is transported to the air outlet nozzle and discharged through the air outlet, ensuring that the molding pressure in the tube blank is within an appropriate range. At the same time, air continuously passes through the tube blank, so that the tube blank is cooled quickly, and the heat dissipation of the bellows during the production process is reduced, thereby reducing the time required for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A stereoscopic diagram of the assembly structure of a molding die for a wear-resistant double-wall corrugated pipe;

[0018] Figure 2 It is a three-dimensional diagram of the lower mold structure;

[0019] Figure 3 This is a three-dimensional diagram of the upper mold structure;

[0020] Figure 4 The figure is a three-dimensional diagram of the air outlet structure;

[0021] Figure 5 It is a three-dimensional diagram of the cross-sectional structure of the air outlet nozzle.

[0022] Reference numerals:

[0023] 1. Lower mold; 101. Mold core; 102. Fixed seat; 103. Push switch; 104. End cover; 105. Vent pipe; 106. Electric control valve; 2. Upper mold; 201. Connecting plate; 202. Electric push rod; 203. Press plate; 3. Air outlet nozzle; 301. Air outlet hole; 302. Piston sleeve; 303. Inner piston; 304. Telescopic rod; 305. Compression spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-5 The utility model is a shaping mold for a wear-resistant double-wall corrugated pipe, comprising a lower mold 1, an upper mold 2 and an air outlet nozzle 3. The upper mold 2 is arranged on the top of the lower mold 1. The lower mold 1 cooperates with the upper mold 2. After the upper mold 2 and the lower mold 1 are put together, the two mold cores 101 are put together to form a molding space of the mold. End covers 104 are fixed at both ends of the upper mold 2 and the lower mold 1. After the upper mold 2 and the lower mold 1 are put together, the two ends are closed by the end covers 104. A fixing seat 102 is fixed at one side of the outer surface of the lower mold 1. A pressing switch 103 is fixed at the top center of the fixing seat 102. The lower mold 1 fixes the pressing switch 103 thereon through the fixing seat 102. When the pressing switch 103 is pressed, the electric control valve 106 is opened. The end cover 104 at one end of the upper mold 2 is fixedly connected with an air outlet nozzle 3. The upper mold 2 discharges the air with excessive pressure after the tube blank is extruded through the air outlet nozzle 3.

[0027] Specifically, a mold core 101 is fixed on the inner wall of the lower mold 1 and the upper mold 2 . The mold cores 101 in the lower mold 1 and the upper mold 2 are symmetrical to each other. The upper mold 2 and the lower mold 1 provide a molding function for the double-wall corrugated pipe through the mold core 101 .

[0028] Furthermore, a vent pipe 105 is fixed through the end cover 104 at one end of the lower mold 1, and the vent pipe 105 is connected to the pipeline for conveying high-pressure air. The vent pipe 105 is arranged at the end of the lower mold 1 away from the air outlet nozzle 3, and an electric control valve 106 is fixed on the peripheral side of the vent pipe 105. The lower mold 1 and the upper mold 2 convey the high-pressure air to the tube blank between the two mold cores 101 in the upper mold 2 and the lower mold 1 through the vent pipe 105, so that the tube blank still in a soft state is extruded and formed, and the vent pipe 105 is controlled to be on and off by the electric control valve 106.

[0029] Furthermore, a pressure plate 203 is symmetrically fixed and connected to the outer surface of the upper mold 2 and the fixed seat 102, a connecting plate 201 is fixed to the upper outer surface of the upper mold 2, an electric push rod 202 is symmetrically fixed to the top of the connecting plate 201, and the top of the electric push rod 202 is fixed to an external lifting structure. After the upper mold 2 is lowered onto the fixed seat 102 by the pressure plate 203 and presses the push switch 103 on the fixed seat 102, the electric control valve 106 is opened, and the electric push rod 202 is connected through the connecting plate 201, and the upper mold 2 is driven to rise and fall through the electric push rod 202.

[0030] The operation process of this embodiment is as follows: when working, firstly, the processed, high-temperature, and relatively soft tube blank is placed in the lower mold 1, and the two ends of the tube blank contact the two end covers 104 at the two ends of the lower mold 1, and then the electric push rod 202 is started, and the electric push rod 202 drives the upper mold 2 to descend until the upper mold 2 and the lower mold 1 are combined. When the upper mold 2 and the lower mold 1 are combined, the tube blank is confined between the two mold cores 101. At this time, the outer pressure plate 203 of the upper mold 2 is pressed onto the push switch 103 on the fixed seat 102, and the push switch 103 is pressed down. After the electric control valve 106 is started, high-pressure air is transported into the tube blank through the ventilation pipe 105, blowing the tube blank so that the tube blank is squeezed onto the two mold cores 101. After the air pressure rises to a suitable pressure, the tube blank is formed. Specific embodiment 2

[0032] See also Figure 1 , 3 , 4, 5, on the basis of the specific embodiment 1, a piston sleeve 302 is fixed to one end of the inner wall of the air outlet nozzle 3 close to the upper mold 2, and an inner piston 303 is sleeved inside the piston sleeve 302. The air outlet nozzle 3 sleeves the inner piston 303 therein through the piston sleeve 302.

[0033] Specifically, a compression spring 305 is fixed to the end of the inner piston 303 away from the upper mold 2, and a telescopic rod 304 is fixed to the end of the air outlet nozzle 3 away from the lower mold 1. The telescopic end of the telescopic rod 304 is fixed to the end of the inner piston 303 in the compression spring 305, and the outer side of the piston sleeve 302 away from the upper mold 2 is provided with air outlet holes 301 in a ring array. When the tube blank between the two mold cores 101 is compressed and deformed to fit the inner wall of the mold core 101, high-pressure gas is still transported into the tube blank, and the pressure in the tube blank increases, pushing the inner piston 303 away from the upper mold 2, pushing the compression spring 305 in the upper mold 2, and stabilizing the direction of movement through the telescopic rod 304. Until the inner piston 303 and the piston sleeve 302 are separated, the high-pressure gas in the molding bellows is transported to the air outlet nozzle 3 and discharged through the air outlet hole 301, ensuring that the molding pressure in the tube blank is within a suitable range. At the same time, air continuously passes through the tube blank, so that the tube blank is quickly cooled and its shape is further solidified.

[0034] The operation process of this embodiment is as follows: when the tube blank between the two mold cores 101 is deformed under pressure to fit the inner wall of the mold core 101, the high-pressure gas is still transported into the tube blank, the pressure in the tube blank increases, pushing the inner piston 303 away from the upper mold 2, pushing the compression spring 305 in the upper mold 2, and stabilizing the direction of movement through the telescopic rod 304, until the inner piston 303 and the piston sleeve 302 are separated, the high-pressure gas in the molding bellows is transported to the air outlet nozzle 3, and discharged through the air outlet hole 301, ensuring that the molding pressure in the tube blank is within an appropriate range. At the same time, air continuously passes through the tube blank, causing the tube blank to cool rapidly and further solidify its shape.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A shaping die for a wear-resistant double-wall corrugated pipe, comprising a lower die (1), an upper die (2) and an air outlet nozzle (3), characterized in that: An upper mold (2) is arranged on the top of the lower mold (1), and end covers (104) are fixed at both ends of the upper mold (2) and the lower mold (1). A fixing seat (102) is fixed at a side edge of the outer surface of the lower mold (1), and a push switch (103) is fixed at the center of the top of the fixing seat (102). An air outlet nozzle (3) is fixedly connected to the end cover (104) at one end of the upper mold (2).

2. The shaping die for a wear-resistant double-wall corrugated pipe according to claim 1, characterized in that: A mold core (101) is fixed on the inner walls of the lower mold (1) and the upper mold (2), and the mold cores (101) in the lower mold (1) and the upper mold (2) are symmetrical to each other.

3. The shaping die for a wear-resistant double-wall corrugated pipe according to claim 1, characterized in that: A vent pipe (105) is fixedly passed through the end cover (104) at one end of the lower mold (1). The vent pipe (105) is arranged at an end of the lower mold (1) away from the air outlet nozzle (3). An electric control valve (106) is fixedly provided on the peripheral side of the vent pipe (105).

4. The shaping die for a wear-resistant double-wall corrugated pipe according to claim 1, characterized in that: The outer surface of the upper mold (2) is symmetrically fixedly connected to the fixed seat (102) with a pressing plate (203), the upper portion of the outer surface of the upper mold (2) is fixed with a connecting plate (201), and the top of the connecting plate (201) is symmetrically fixed with an electric push rod (202).

5. The shaping die for a wear-resistant double-wall corrugated pipe according to claim 1, characterized in that: A piston sleeve (302) is fixed to one end of the inner wall of the air outlet nozzle (3) close to the upper mold (2), and an inner piston (303) is sleeved inside the piston sleeve (302).

6. The shaping die for a wear-resistant double-wall corrugated pipe according to claim 5, characterized in that: A compression spring (305) is fixed to the end of the inner piston (303) away from the upper mold (2), a telescopic rod (304) is fixed through the end of the air outlet nozzle (3) away from the lower mold (1), the telescopic end of the telescopic rod (304) is fixed to the end of the inner piston (303) in the compression spring (305), and air outlet holes (301) are opened in a ring array on the outer side of the end of the piston sleeve (302) away from the upper mold (2).

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