Internal and external temperature control cooling external sizing die

Abstract

The utility model belongs to the technical field of plastic pipeline forming, and discloses an internal and external temperature control cooling external sizing mold, which is arranged on a pipeline mouth mold and in front of a sizing sleeve, and comprises a sliding rod assembly, a cooling outer ring, a water retaining assembly and a temperature control core mold, the cooling outer ring and the water retaining assembly are arranged on the sliding rod assembly in a sliding mode, the cooling outer ring is used for cooling a pipe blank extruded from the pipeline mouth die and adjusting the cooling range through sliding, the water retaining assembly is arranged behind the cooling outer ring, a cooling water space is formed by the water retaining assembly and the cooling outer ring, and the temperature control core die is arranged in the pipe blank. And cooling the inner surface of the pipe blank. Temperature control cooling is conducted on the inner surface and the outer surface of the pipe blank at the same time, the pipe blank cooling speed is controlled, the pipe toughness and the inner surface smoothness and flatness are improved, meanwhile, the pipe blank can still be located above the softening point, and complete cooling outer sizing can be normally achieved through the sizing sleeve.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic pipe forming, in particular to an internal and external temperature controlled cooling external sizing die. Background Art

[0002] Plastic pipe standards usually use outer diameter series to distinguish specifications, and sizing sleeves are usually used for external cooling and sizing after extrusion. Some pipes have a high linear speed and are directly in contact with water after entering the sizing sleeve. The cooling speed is too fast, which can easily lead to low toughness. The water rings in patents CN212147473U and CN216683280U are used to enhance cooling and speed up, but cannot solve the problem of low toughness. Some pipes, especially large-diameter pipes, usually use sizing sleeves for cooling and sizing. The inner surface is not smooth and flat due to untimely cooling and irregular shrinkage after leaving the mold. Utility Model Content

[0003] The utility model aims to provide an external sizing die with internal and external temperature control and cooling to solve the above technical problems.

[0004] In order to solve the above technical problems, the specific technical solution of the utility model for cooling the external sizing die with internal and external temperature control is as follows:

[0005] The utility model discloses an internal and external temperature controlled cooling external sizing die, which is arranged on a pipe mouth die and before a sizing sleeve, and comprises a slide bar assembly, a cooling outer ring, a water retaining assembly and a temperature controlling core die. The slide bar assembly is fixedly arranged on the pipe mouth die, and the cooling outer ring and the water retaining assembly are slidably arranged on the slide bar assembly. The cooling outer ring is used to cool the pipe blank extruded from the pipe mouth die, and the cooling range is adjusted by sliding. The water retaining assembly is arranged behind the cooling outer ring to form a cooling water space with the cooling outer ring. The temperature controlling core die is arranged in the pipe blank to cool the inner surface of the pipe blank.

[0006] Furthermore, the slide bar assembly includes a slide bar plate and a slide bar, the slide bar plate is fixedly mounted on the pipe die, the slide bar is vertically and evenly mounted on the slide bar plate, and the slide bar is used to install the cooling outer ring and the water retaining assembly.

[0007] Furthermore, the slide bar plate is fixed on the pipe die by fastening screws.

[0008] Furthermore, the outer diameter of the slide bar plate is greater than or equal to the outer diameter of the pipe die.

[0009] Furthermore, the cooling outer ring has a through hole one, and the cooling outer ring is installed on the slide rod through the through hole one, and can slide left and right along the slide rod. The cooling outer ring is used to evenly spray cooling medium such as air and cooling water onto the outer surface of the tube blank in an annular direction to cool the outer surface of the tube blank.

[0010] Furthermore, a threaded hole 1 is circumferentially arranged on the outer edge of the cooling outer ring, and a screw passing through the threaded hole 1 can fix the cooling outer ring on the sliding rod.

[0011] Furthermore, the water retaining assembly includes a water retaining plate, a rubber pad, and a pressure plate. The water retaining plate has a second through hole. The water retaining plate is installed on the sliding rod through the second through hole. The water retaining plate can slide left and right along the sliding rod. The pressure plate presses the rubber pad and fixes it on the water retaining plate.

[0012] Furthermore, a second threaded hole is circumferentially arranged on the outer edge of the water baffle plate, and a screw passing through the second threaded hole can fix the water baffle plate on the sliding rod.

[0013] Furthermore, the inner diameter of the rubber pad is smaller than the outer diameter of the tube blank.

[0014] Furthermore, the temperature-controlling core mold is arranged at a distance from the end face of the protruding pipe die, the protruding part is provided with a temperature-controlling medium flow channel, and the temperature-controlling core mold is connected to a mold temperature controller.

[0015] The utility model has the following advantages: the utility model realizes the control of the cooling speed of the tube billet by controlling the temperature of the inner and outer surfaces of the tube billet at the same time, improves the toughness of the tube material and the smoothness of the inner surface, and at the same time, the tube billet can still be above the softening point, and can be fully cooled and sized normally through the sizing sleeve. This solution can be realized by adding components to the existing equipment, with little modification to the existing equipment and outstanding practical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the structure of the internal and external temperature controlled cooling external sizing die of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the slide bar assembly of the utility model;

[0018] Figure 3 It is a side structural schematic diagram of the slide bar assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the internal and external temperature-controlled cooling external sizing die of the utility model;

[0020] Explanation of markings in the figure: 1. Pipe die; 2. Sizing sleeve; 3. Slide rod assembly; 31. Slide rod plate; 32. Slide rod; 33. Fastening screw; 4. Cooling outer ring; 41. Through hole one; 42. Threaded hole one; 5. Water retaining assembly; 51. Water retaining plate; 511. Through hole two; 512. Threaded hole two; 52. Rubber pad; 53. Pressing plate; 6. Temperature control core mold; 61. Temperature control medium flow channel; 7. Pipe blank. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of the utility model of an internal and external temperature controlled cooling external sizing die in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, the utility model is an internal and external temperature controlled cooling external sizing die, which is arranged on the pipe mouth die 1 and before the sizing sleeve 2, and includes a slide bar assembly 3, a cooling outer ring 4, a water retaining assembly 5, and a temperature control core mold 6. The slide bar assembly 3 is fixedly arranged on the pipe mouth die 1, and the cooling outer ring 4 and the water retaining assembly 5 are slidably arranged on the slide bar assembly 3. The cooling outer ring 4 is used to cool the tube blank 7 extruded from the pipe mouth die 1, and the cooling range is adjusted by sliding. The water retaining assembly 5 is arranged behind the cooling outer ring 4 to form a cooling water space with the cooling outer ring 4, and the temperature control core mold 6 is arranged in the tube blank 7 to cool the inner surface of the tube blank 7.

[0023] The slide bar assembly 3 includes a slide bar plate 31, a slide bar 32 and a fastening screw 33. The slide bar plate 31 is fixed to the pipe die 1 by the fastening screw 33, and its outer diameter is greater than or equal to the outer diameter of the pipe die 1, which can prevent the die temperature from dropping suddenly when water vapor leaks and disperses, causing the material in the mold to harden and the extrusion pressure to increase sharply. The slide bar 32 is vertically and evenly installed on the slide bar plate 31, and is used to install the cooling outer ring 4 and the water retaining assembly 5.

[0024] The cooling outer ring 4 has a through hole 41, and the cooling outer ring 4 is installed on the slide bar 32 through the through hole 41, and can slide left and right along the slide bar 32. The outer edge of the cooling outer ring 4 is circumferentially provided with a threaded hole 42, and the screw passes through the threaded hole 42 to fix the cooling outer ring 4 on the slide bar 32. The cooling outer ring 4 is used to evenly spray cooling medium such as air and cooling water on the outer surface of the tube blank 7 in an circumferential direction to cool the outer surface of the tube blank 7. The cooling outer ring 4 can adjust the flow rate of the cooling medium, and can also adjust the cooling effect of the outer surface of the tube blank 7 by controlling the temperature of the air source and the water source.

[0025] The water retaining assembly 5 includes a water retaining plate 51, a rubber pad 52, and a pressing plate 53. The water retaining plate 51 has a second through hole 511, through which the water retaining plate 51 is mounted on the slide bar 32. The water retaining plate 51 can slide left and right along the slide bar 51. The outer edge of the water retaining plate 51 is provided with a second threaded hole 512 in an annular direction. The screw passes through the second threaded hole 512 to fix the water retaining plate 51 on the slide bar 32. The pressing plate 53 presses and fixes the rubber pad 52 on the water retaining plate 51. The inner diameter of the rubber pad 52 is smaller than the outer diameter of the tube blank 7, and is used to prevent the cooling medium from continuing to move toward the sizing sleeve 2. By adjusting the distance between the water retaining assembly 5 and the cooling outer ring 4, the cooling effect can be adjusted by controlling the outer surface area of ​​the tube blank 7 covered by the cooling medium.

[0026] The temperature control core mold 6 is arranged at a distance from the end face of the protruding pipe die 1, and a temperature control medium flow channel 61 is arranged on the protruding part. The temperature control core mold 6 is connected to a mold temperature controller, and the temperature of the inner surface cooling temperature of the tube blank 6 after being extruded from the pipe die 1 is adjusted by the mold temperature controller. This makes up for the problem of untimely cooling and irregular shrinkage of the inner surface under external cooling sizing, and greatly improves the smoothness and flatness of the inner surface.

[0027] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An external sizing die with internal and external temperature control and cooling, arranged on a pipe die (1) and before a sizing sleeve (2), characterized in that: The invention comprises a slide bar assembly (3), a cooling outer ring (4), a water retaining assembly (5) and a temperature control core mold (6), wherein the slide bar assembly (3) is fixedly arranged on a pipe die (1), the cooling outer ring (4) and the water retaining assembly (5) are slidably arranged on the slide bar assembly (3), the cooling outer ring (4) is used to cool a tube blank (7) extruded from the pipe die (1), and the cooling range is adjusted by sliding, the water retaining assembly (5) is arranged behind the cooling outer ring (4) and forms a cooling water space with the cooling outer ring (4), and the temperature control core mold (6) is arranged in the tube blank (7) to cool the inner surface of the tube blank (7).

2. The internal and external temperature controlled cooling external sizing die according to claim 1, characterized in that: The slide bar assembly (3) comprises a slide bar plate (31) and a slide bar (32); the slide bar plate (31) is fixedly mounted on the pipe die (1); the slide bar (32) is vertically and evenly mounted on the slide bar plate (31); the slide bar (32) is used to mount a cooling outer ring (4) and a water retaining assembly (5).

3. The internal and external temperature controlled cooling external sizing die according to claim 1, characterized in that: The slide bar plate (31) is fixed to the pipe die (1) by means of fastening screws (33).

4. The internal and external temperature controlled cooling external sizing die according to claim 2, characterized in that: The outer diameter of the slide bar plate (31) is greater than or equal to the outer diameter of the pipe die (1).

5. The internal and external temperature controlled cooling external sizing die according to claim 1, characterized in that: The cooling outer ring (4) has a through hole 1 (41). The cooling outer ring (4) is mounted on the slide bar (32) through the through hole 1 (41) and can slide left and right along the slide bar (32). The cooling outer ring (4) is used to evenly spray a cooling medium such as air or cooling water onto the outer surface of the tube blank (7) in an annular direction to cool the outer surface of the tube blank (7).

6. The internal and external temperature controlled cooling external sizing die according to claim 5, characterized in that: The outer edge of the cooling outer ring (4) is circumferentially provided with a threaded hole (42), and a screw passing through the threaded hole (42) can fix the cooling outer ring (4) on the sliding rod (32).

7. The internal and external temperature controlled cooling external sizing die according to claim 1, characterized in that: The water baffle assembly (5) comprises a water baffle plate (51), a rubber pad (52), and a pressing plate (53). The water baffle plate (51) has a second through hole (511). The water baffle plate (51) is mounted on the slide bar (32) through the second through hole (511). The water baffle plate (51) can slide left and right along the slide bar (32). The pressing plate (53) presses and fixes the rubber pad (52) on the water baffle plate (51).

8. The internal and external temperature controlled cooling external sizing die according to claim 7, characterized in that: The outer edge of the water baffle plate (51) is circumferentially provided with a second threaded hole (512), and a screw passing through the second threaded hole (512) can fix the water baffle plate (51) on the slide rod (32).

9. The internal and external temperature controlled cooling external sizing die according to claim 7, characterized in that: The inner diameter of the rubber pad (52) is smaller than the outer diameter of the tube blank (7).

10. The internal and external temperature controlled cooling external sizing die according to claim 1, characterized in that: The temperature control core mold (6) is arranged at a distance from the end surface of the protruding pipe mouth mold (1), and a temperature control medium flow channel (61) is arranged on the protruding portion. The temperature control core mold (6) is connected to a mold temperature controller.

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