Vertical extruder for PTFE (Polytetrafluoroethylene) pipes

Abstract

The utility model belongs to the field of extruders, and particularly relates to a PTFE (Polytetrafluoroethylene) pipe vertical extruder which comprises a bracket, the charging barrel is fixedly installed in the middle of the top of the support, an electric heating device is fixedly installed on the outer wall of the charging barrel, the top of the charging barrel is open, and a die head is installed at the bottom of the charging barrel; the core rod is movably inserted into the top of the charging barrel; the driving mechanism comprises a pair of hydraulic cylinders, the hydraulic cylinders are symmetrically and fixedly installed on the two sides of the top of the support, a movable plate is fixedly installed at the telescopic ends of the tops of the hydraulic cylinders, a push rod is fixedly installed in the center of the bottom end of the movable plate, and the core rod is fixedly installed at the bottom of the push rod; the feeding mechanism is arranged at the top of the charging barrel, and the material blank rods are loaded into the charging barrel through the feeding mechanism; through the arrangement of the feeding mechanism, rapid replacement is facilitated, operation is easy, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of extruders, and specifically relates to a vertical extruder for PTFE pipes. Background Technique

[0002] PTFE pipes, also known as polytetrafluoroethylene pipes, usually use an extruder as the main extrusion molding device during production.

[0003] The utility model with the existing publication number CN219650505U discloses a push-pull extrusion machine for polytetrafluoroethylene pipes, including a bracket, a power mechanism, a moving plate, a push rod, a mandrel, a barrel, a heating mechanism, and a die head. The barrel is longitudinally fixed on the bracket, the bottom of the barrel is connected to the die head through a flange, a heating mechanism is arranged outside the barrel, the moving plate is connected to the power mechanism, and the moving plate can move up and down horizontally under the drive of the power mechanism. The mandrel is longitudinally fixed on the bracket, its lower end extends into the barrel and is connected to the die head at the bottom of the barrel. There is a gap between the mandrel and the barrel. The push rod is sleeved outside the mandrel, and the upper end of the push rod is fixedly connected to the moving plate. The utility model extrudes from top to bottom. The mandrel is fixed, and the extrusion molding of the polytetrafluoroethylene pipe can be realized only by the downward movement of the push rod. After molding, only the flange needs to be disassembled to conveniently carry out the next filling operation from bottom to top. The push-pull extrusion machine has a simple structure, is easy to control, and is convenient for maintenance.

[0004] However, after one extrusion operation of the above device, it is necessary to manually disassemble the flange to remove the die head at the bottom, then add the material blank rod into the barrel from bottom to top, and then install the die head. The operation is relatively cumbersome and affects the processing efficiency. Therefore, a vertical extruder for PTFE pipes is proposed for the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the existing technology and solve the problems that after one extrusion operation of the existing equipment, it is necessary to manually disassemble the flange to remove the die head at the bottom, then add the material blank rod into the barrel from bottom to top, and then install the die head. The operation is relatively cumbersome and affects the processing efficiency. The utility model proposes a vertical extruder for PTFE pipes.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a vertical extruder for PTFE pipes described in the utility model includes a bracket;

[0007] A barrel, the barrel is fixedly installed in the middle of the top of the bracket, an electric heating device is fixedly installed on the outer wall of the barrel, the top of the barrel is open, and a die head is installed at the bottom of the barrel;

[0008] A mandrel, the mandrel is movably inserted into the top of the barrel;

[0009] A driving mechanism, the driving mechanism includes a hydraulic cylinder, there are a pair of hydraulic cylinders which are symmetrically and fixedly installed on both sides of the top of the bracket, a movable plate is fixedly installed on the telescopic end at the top of the hydraulic cylinder, a push rod is fixedly installed at the center of the bottom end of the movable plate, and the mandrel is fixedly installed at the bottom of the push rod;

[0010] A feeding mechanism, the feeding mechanism is arranged at the top of the barrel, and the material blank rod is loaded into the barrel through the feeding mechanism.

[0011] Preferably, the feeding mechanism includes a sealing plate, the sealing plate is installed at the top of the barrel, the sealing plate is movably sleeved on the mandrel, sliding grooves are symmetrically opened on the outer side wall of the mandrel, stoppers are symmetrically fixedly connected to both sides of the inner wall of the central hole of the sealing plate, the stoppers are slidably arranged in the sliding grooves, the bottom of the sliding grooves is closed, a spring is installed at the top of the sealing plate, a pressing plate is fixedly connected to the outer wall of the push rod, and the top of the spring abuts against the pressing plate.

[0012] Preferably, a clamping groove is opened in the middle of the top of the barrel, the outer contour of the sealing plate is adapted to the clamping groove, and a chamfer is arranged at the top edge of the clamping groove.

[0013] Preferably, a sealing gasket is installed inside the clamping groove.

[0014] Preferably, the sealing gasket is made of rubber material.

[0015] Preferably, a second guide rod is fixedly installed at the top of the sealing plate, the top of the guide rod penetrates upward through the sliding holes opened on the pressing plate and the movable plate, and the spring is sleeved on the second guide rod.

[0016] Preferably, the die head is fixedly installed at the bottom of the barrel through a flange.

[0017] Preferably, guide rods are symmetrically and fixedly connected to the four circumferences of the top of the bracket, a top plate is fixedly connected to the top of the guide rods, and the sides of the movable plate are respectively slidably sleeved on the guide rods.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, the hydraulic cylinder drives the movable plate, the push rod and the mandrel to move upward, the stoppers inside the sealing plate slide along the sliding grooves, until the bottom of the sliding grooves contacts the stoppers, the sealing plate can be driven to move upward synchronously. At this time, the top opening of the barrel is opened, and then the material blank rod can be sent into the barrel, so as to facilitate the rapid replacement of the material blank rod, with simple operation and convenient use.

[0020] 2. The utility model drives the movable plate, the push rod and the mandrel to move downward through the hydraulic cylinder, so that the mandrel is inserted into the inside of the barrel again, and the sealing plate moves downward together with it, and finally fits on the top of the barrel. As the push rod drives the mandrel to continue to move downward, the push rod synchronously drives the pressing plate to press the spring tightly on the top of the sealing plate, so that the sealing plate fits tightly on the top of the barrel. When the sealing plate is clamped inside the clamping groove, the spring is used to push the sealing plate, so that the sealing plate presses the sealing gasket downward, thereby improving the airtightness of the device and avoiding heat dissipation inside the barrel. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1;

[0023] Figure 2 It is a partial cross-sectional view of Embodiment 1;

[0024] Figure 3 For A in Embodiment 1 Figure 2 It is an enlarged schematic diagram of the structure at A;

[0025] Figure 4 For B in Embodiment 1 Figure 2 It is an enlarged schematic diagram of the structure at B;

[0026] Figure 5 For C in Embodiment 1 Figure 2 It is an enlarged schematic diagram of the structure at C.

[0027] In the figure: 1, support; 2, hydraulic cylinder; 3, barrel; 4, mandrel; 5, push rod; 6, guide rod 1; 7, movable plate; 8, top plate; 9, clamping groove; 10, sealing plate; 11, stop block; 12, sliding groove; 13, guide rod 2; 14, spring; 15, sealing gasket; 16, pressing plate; 17, sliding hole. Detailed Embodiment

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present utility model.

[0029] Embodiment 1

[0030] Please refer to Figures 1-5 as shown in the figure, a vertical extruder for PTFE pipes, comprising a bracket 1;

[0031] a barrel 3, the barrel 3 is fixedly installed in the middle of the top of the bracket 1, an electric heating device is fixedly installed on the outer wall of the barrel 3, the top of the barrel 3 is open, and a die head is installed at the bottom of the barrel 3;

[0032] a mandrel 4, the mandrel 4 is movably inserted into the top of the barrel 3;

[0033] a driving mechanism, the driving mechanism includes a hydraulic cylinder 2, a pair of the hydraulic cylinders 2 are symmetrically fixedly installed on both sides of the top of the bracket 1, a movable plate 7 is fixedly installed on the top telescopic end of the hydraulic cylinder 2, a push rod 5 is fixedly installed at the center of the bottom end of the movable plate 7, and the mandrel 4 is fixedly installed at the bottom of the push rod 5;

[0034] a feeding mechanism, the feeding mechanism is arranged at the top of the barrel 3, and the material blank is loaded into the barrel 3 through the feeding mechanism;

[0035] During operation, the hydraulic cylinder 2 drives the movable plate 7 to move upward, and then the push rod 5 and the mandrel 4 move upward through the push rod 5, so that the bottom end of the mandrel 4 disengages from the barrel 3, and at the same time drives the feeding mechanism to open. Then, the material blank is added into the barrel 3 from the top of the barrel 3. Then, the hydraulic cylinder 2 drives the movable plate 7, the push rod 5 and the mandrel 4 to move downward, so that the mandrel 4 is inserted into the barrel 3 again and abuts against the top of the material blank, and the feeding mechanism is closed accordingly to seal the top of the barrel 3. Then, the material blank in the barrel 3 is heated to a molten state by the electric heating device. The side wall of the mandrel 4 is attached to the inner wall of the barrel 3, so that the mandrel 4 continues to move downward to extrude the molten material into the die head, and the material is shaped into a PTFE pipe through the die head.

[0036] The feeding mechanism includes a sealing plate 10 which is installed on the top of the barrel 3. The sealing plate 10 is movably sleeved on the mandrel 4. Symmetrical sliding grooves 12 are formed on the outer side wall of the mandrel 4. On both sides of the inner wall of the central hole of the sealing plate 10, stoppers 11 are symmetrically and fixedly connected. The stoppers 11 are slidably arranged in the sliding grooves 12. The bottom of the sliding grooves 12 is closed. A spring 14 is installed at the top of the sealing plate 10. A pressing plate 16 is fixedly connected to the outer wall of the push rod 5. The top of the spring 14 abuts against the pressing plate 16. During operation, the hydraulic cylinder 2 drives the movable plate 7, the push rod 5 and the mandrel 4 to move upward. The stoppers 11 inside the sealing plate 10 slide along the sliding grooves 12. When the bottom of the sliding grooves 12 contacts the stoppers 11, the sealing plate 10 can be driven to move upward synchronously. Then, the bottom end of the mandrel 4 disengages from the inside of the barrel 3. At the same time, the sealing plate 10 no longer blocks the top of the barrel 3. At this time, the top opening of the barrel 3 is opened, and thus the material blank can be fed into the inside of the barrel 3. Then, the hydraulic cylinder 2 drives the movable plate 7, the push rod 5 and the mandrel 4 to move downward, so that the mandrel 4 is inserted into the inside of the barrel 3 again, and the sealing plate 10 moves downward accordingly and finally fits against the top of the barrel 3. As the push rod 5 pushes the mandrel 4 to continue moving downward, the push rod 5 synchronously drives the pressing plate 16 to press the spring 14 against the top of the sealing plate 10, thereby making the sealing plate 10 closely fit against the top of the barrel 3.

[0037] A clamping groove 9 is formed in the middle of the top end of the barrel 3. The outer contour of the sealing plate 10 is adapted to the clamping groove 9. A chamfer is provided at the top edge of the clamping groove 9. During operation, the sealing plate 10 can be clamped inside the clamping groove 9 to seal the top of the barrel 3.

[0038] A sealing gasket 15 is installed inside the clamping groove 9. During operation, when the sealing plate 10 is clamped inside the clamping groove 9, the spring 14 pushes the sealing plate 10, so that the sealing plate 10 presses the sealing gasket 15 downward, thereby improving the airtightness of the device and preventing the heat inside the barrel 3 from dissipating.

[0039] The sealing gasket 15 is made of rubber material.

[0040] A second guide rod 13 is fixedly installed at the top of the sealing plate 10. The top of the guide rod penetrates upward through the sliding holes 17 formed in the pressing plate 16 and the movable plate 7. The spring 14 is sleeved on the second guide rod 13. During operation, the second guide rod 13 can limit the spring 14 to make the installation of the spring 14 more stable.

[0041] The die head is fixedly installed at the bottom of the barrel 3 through a flange. During operation, it is convenient to install and replace the die head.

[0042] Embodiment 2

[0043] Please refer to Figure 1As shown, as another implementation mode of the present utility model compared with the first comparative example, guide rods 6 are symmetrically and fixedly connected to the periphery of the top of the bracket 1. The top of the guide rods 6 is fixedly connected with a top plate 8, and the sides of the movable plate 7 are respectively slidably sleeved on the guide rods 6. During operation, the movement direction of the movable plate 7 is limited by the guide rods 6, so that the movement of the movable plate 7 is more stable.

[0044] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A PTFE pipe vertical extruder, characterized in that: comprising a bracket (1); A barrel (3), the barrel (3) is fixedly mounted in the middle of the top of the bracket (1), an electric heating device is fixedly mounted on the outer wall of the barrel (3), the top of the barrel (3) is open, and a die head is mounted at the bottom of the barrel (3); A mandrel (4), the mandrel (4) being movably inserted into the top of the barrel (3); A driving mechanism, the driving mechanism comprising a hydraulic cylinder (2), the hydraulic cylinder (2) being provided with a pair of symmetrical fixed installations on both sides of the top of the bracket (1), a movable plate (7) being fixedly installed on the telescopic end of the top of the hydraulic cylinder (2), a push rod (5) being fixedly installed at the center of the bottom end of the movable plate (7), and the mandrel (4) being fixedly installed at the bottom of the push rod (5); A loading mechanism is arranged at the top of the barrel (3), and the material embryo rod is loaded into the barrel (3) through the loading mechanism.

2. A PTFE pipe vertical extruder according to claim 1, characterized in that: The feeding mechanism includes a sealing plate (10), which is installed on the top of the barrel (3). The sealing plate (10) is movably sleeved on the core rod (4), and a sliding groove (12) is symmetrically opened on the outer wall of the core rod (4). Stoppers (11) are symmetrically fixedly connected to the inner wall of the center hole of the sealing plate (10) on both sides. The stoppers (11) are slidably set in the sliding groove (12), and the bottom of the sliding groove (12) is closed. A spring (14) is installed on the top of the sealing plate (10), and a pressure plate (16) is fixedly connected to the outer wall of the push rod (5), and the top of the spring (14) is in contact with the pressure plate (16).

3. A PTFE pipe vertical extruder according to claim 2, characterized in that: A slot (9) is provided in the middle of the top end of the barrel (3); the outer contour of the sealing plate (10) is adapted to the slot (9); and the top edge of the slot (9) is chamfered.

4. A PTFE pipe vertical extruder according to claim 3, characterized in that: A sealing gasket (15) is installed inside the card slot (9).

5. A PTFE pipe vertical extruder according to claim 4, characterized in that: The sealing pad (15) is made of rubber material.

6. A PTFE pipe vertical extruder according to claim 5, characterized in that: A second guide rod (13) is fixedly mounted on the top of the sealing plate (10), the top end of the guide rod upwardly passes through a sliding hole (17) provided on the pressing plate (16) and the movable plate (7), and the spring (14) is sleeved on the second guide rod (13).

7. A PTFE pipe vertical extruder according to claim 6, characterized in that: The die head is fixedly mounted on the bottom of the barrel (3) via a flange.

8. A PTFE pipe vertical extruder according to claim 7, characterized in that: The top of the bracket (1) is symmetrically fixedly connected with a guide rod (6), the top of the guide rod (6) is fixedly connected with a top plate (8), and the side edges of the movable plate (7) are respectively slidably sleeved on the guide rod (6).

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