Screw dismounting mechanism of PAF pipe single-screw extruder

Abstract

The utility model relates to a screw dismounting mechanism of a PAF pipe single-screw extruder, and belongs to the field of extruders, the screw dismounting mechanism comprises a machine body, a mounting seat is arranged at the tail part of the machine body, a driving piece is arranged on the mounting seat, an output shaft of the driving piece is detachably connected with a push rod, and one end, far away from the driving piece, of the push rod is propped against the end part of a screw in the machine body. The extrusion device has the advantage that the extrusion quality of the PFA pipe is improved.

Description

Technical Field

[0001] The present application relates to a PAF tube single-screw extruder, and in particular to a screw disassembly mechanism of the PAF tube single-screw extruder. Background Art

[0002] Screw extruder is a commonly used plastic processing equipment. It mainly heats and melts the raw materials through the cooperation between the screw and the barrel, and extrude the molten material into shape through the rotation of the screw.

[0003] Extruders used to produce PFA tubes have high cleanliness requirements, requiring regular screw disassembly and cleaning during production. Existing methods for screw removal typically involve turning a screw threaded at the end of the extruder to eject the screw from the barrel. However, this method requires a high torque, which can easily lead to the generation of metal debris inside the barrel, thus affecting the quality of PFA tube production. This requires further improvement. Utility Model Content

[0004] In order to facilitate screw disassembly while reducing the generation of metal debris in the barrel, the present application provides a screw disassembly mechanism for a PAF tube single-screw extruder.

[0005] The present application provides a screw disassembly mechanism for a PAF tube single-screw extruder, which adopts the following technical solution: a screw disassembly mechanism for a PAF tube single-screw extruder, comprising a body, a mounting seat being provided at the rear of the body, a driving member being provided on the mounting seat, and a push rod being detachably connected to the output shaft of the driving member, the end of the push rod away from the driving member being in contact with the end of the screw in the body.

[0006] By adopting the above technical solution, when the screw of the extruder needs to be disassembled, the push rod is installed between the driving member and the screw, and the driving member drives the push rod to push the screw out of the body. Compared with the existing method of rotating the screw inside the body to push the screw out, the generation of metal debris caused by the large rotational torque of the screw can be reduced, thereby improving the quality of PFA tube production and also improving the efficiency of screw disassembly.

[0007] Preferably, the driving member is an electric cylinder.

[0008] By adopting the above technical solution, the driving part adopts an electric cylinder, which makes it easy to accurately control the torque of the push rod pushing the screw, thereby further reducing the generation of metal debris.

[0009] Preferably, the driving member is a cylinder.

[0010] By adopting the above technical solution, the driving member adopts an oil cylinder, which has a large driving force and can quickly realize the disassembly of the screw.

[0011] Preferably, the push rod segments are detachably connected.

[0012] By adopting the above technical solution, the push rod arranged in sections can continuously extend the length of the push rod in the process of pushing the screw, thereby reducing the length of the driving member and reducing the space occupied within the length range.

[0013] Preferably, the push rods are threadedly connected.

[0014] By adopting the above technical solution, the push rods arranged in sections are connected by threads, which can improve the stability between the push rods and also facilitate disassembly and assembly.

[0015] Preferably, the push rods are engaged with each other.

[0016] By adopting the above technical solution, the push rods arranged in sections are mutually engaged, thereby facilitating the disassembly and assembly of the push rods.

[0017] Preferably, a positioning groove is provided at the end of the screw rod, and the end of the push rod is inserted into the positioning groove.

[0018] By adopting the above technical solution, the push rod is inserted into the positioning groove at the end of the screw rod, thereby improving the stability of the push rod in pushing the screw rod.

[0019] Preferably, the output shaft end of the driving member is provided with a plug hole, and the push rod end is plugged into the plug hole.

[0020] By adopting the above technical solution, the push rod is inserted into the insertion hole at the end of the output shaft of the driving member, thereby improving the stability of the driving member driving the push rod.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] When the screw of the extruder needs to be disassembled, the push rod is installed between the driving member and the screw, and the driving member drives the push rod to push the screw out of the machine body. Compared with the existing method of rotating the screw in the machine body to push the screw out, it can reduce the generation of metal debris caused by the large rotation torque of the screw, thereby improving the quality of PFA tube production and also improving the efficiency of screw disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the single-screw extruder in the embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure inside the body of the extruder in the embodiment of the present application.

[0025] Figure 3It is a schematic diagram of the installation structure of the disassembly mechanism and the body in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the installation structure of the push rod in the embodiment of the present application.

[0027] Figure 5 This is a schematic diagram of another installation structure of the push rod in the embodiment of the present application.

[0028] Explanation of the accompanying reference numerals: 1. Body; 11. Clearance hole; 2. Screw; 21. Positioning groove; 3. Motor; 4. Driving gear; 5. Driven gear; 6. Mounting seat; 7. Driving member; 71. Plug-in hole; 8. Push rod; 81. Boss; 82. Slot; 83. Block; 84. Guide groove; 85. Slot. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The present application embodiment discloses a screw disassembly mechanism for a PAF tube single screw extruder. Figure 1 and Figure 2 The single-screw extruder consists of a body 1, a screw 2, a drive mechanism, and a disassembly mechanism. The screw 2 is located inside the body 1. The drive mechanism is installed on the body 1 to drive the screw 2 to rotate. The disassembly mechanism is installed at the rear of the body 1 and is used to eject the screw 2 from the body 1. Before ejecting the screw 2, the die head at the head of the body 1 needs to be removed.

[0031] Reference Figure 2 The drive mechanism includes a motor 3, a driving gear 4, and a driven gear 5. The motor 3 is mounted on the machine platform, and the output shaft of the motor 3 extends and is coaxially fixedly connected to the driving gear 4. The driving gear 4 is rotatably mounted in the machine body 1. The driven gear 5 is keyed to the end of the screw 2, and the driving gear 4 and the driven gear 5 are meshed with each other. The driven gear 5 is keyed to the end of the screw 2 and can be separated from the driven gear 5 along the axis of the screw 2.

[0032] Reference Figure 2 and Figure 3 Specifically, a mounting base 6 is provided at the rear of the machine body 1, and a driving member 7 is provided on the mounting base 6. The output shaft of the driving member 7 is detachably connected to a push rod 8, and the end of the push rod 8 away from the driving member 7 abuts against the end of the screw 2 in the machine body 1. When the screw 2 needs to be removed, the push rod 8 is installed between the driving member 7 and the screw 2. The driving member 7 drives the push rod 8 to push the screw 2 out of the machine body 1 for a distance and then withdraw it. Compared with the existing method of using the screw rod inside the machine body 1 to push out the screw 2, this method can reduce the generation of metal debris caused by the large rotational torque of the screw rod, thereby improving the quality of PFA tube production and also improving the efficiency of removing the screw 2.

[0033] In this embodiment, the driving member 7 is an electric cylinder, which facilitates precise control of the torque and length of the push rod 8 pushing the screw 2, thereby further reducing the generation of metal debris. In other embodiments, the driving member 7 can also be an oil cylinder.

[0034] Reference Figure 3 The rear end of the body 1 is provided with a clearance hole 11 for the push rod 8 to be inserted therein. To enhance the stability of the push connection between the push rod 8 and the screw rod 2, a positioning groove 21 is provided at the end of the screw rod 2, into which the end of the push rod 8 is inserted. Furthermore, the output shaft end of the driver 7 is provided with a socket 71, into which the end of the push rod 8 is inserted. The push rod 8 is inserted into the socket 71 on the output shaft end of the driver 7, thereby enhancing the stability of the driver 7 in driving the push rod 8.

[0035] Reference Figure 3 Furthermore, the push rod 8 in the present application is detachably connected in sections. The sectioned push rod 8 can continuously extend the length of the push rod 8 in the process of pushing the screw 2, thereby reducing the length of the driving member 7 and reducing the space occupied within the length range.

[0036] Reference Figure 4 and Figure 5 Specifically, the push rods 8 in the present application are threadedly connected. The push rods 8 arranged in sections are threadedly connected, which can improve the stability between the push rods 8 and also facilitate disassembly and assembly. In other embodiments, the push rods 8 can be clamped together. Specifically, the push rods 8 arranged in sections are provided with a boss 81 at one end and a slot 82 at the other end. Two clamping blocks 83 are symmetrically provided on the boss 81 along the circumferential direction. A guide groove 84 is correspondingly provided on the groove wall of the slot 82. A clamping groove 85 is provided at the bottom of the slot 82 along the circumferential direction. The clamping groove 85 is communicated with the guide groove 84. The boss 81 is inserted into the slot 82, and then the push rod 8 is rotated so that the clamping block 83 on the boss 81 is clamped into the clamping groove 85, thereby improving the stability between the push rods 8 arranged in sections.

[0037] The implementation principle of the screw disassembly mechanism of a PAF tube single-screw extruder in the embodiment of the present application is: the driving member 7 drives the push rod 8 to push the screw 2 out of the machine body 1. Compared with the existing method of rotating the screw inside the machine body 1 to push out the screw 2, it can reduce the generation of metal debris caused by the large rotational torque of the screw, thereby improving the quality of PFA tube production, and at the same time, it can also improve the efficiency of disassembly of the screw 2.

[0038] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A screw disassembly mechanism for a PAF tube single-screw extruder, characterized by: The invention comprises a machine body (1), a mounting seat (6) is provided at the rear of the machine body (1), a driving member (7) is provided on the mounting seat (6), an output shaft of the driving member (7) is detachably connected to a push rod (8), and an end of the push rod (8) away from the driving member (7) abuts against the end of a screw rod (2) in the machine body (1).

2. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 1, characterized in that: The driving member (7) is an electric cylinder.

3. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 1, characterized in that: The driving member (7) is an oil cylinder.

4. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 1, characterized in that: The push rod (8) is detachably connected in sections.

5. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 4, characterized in that: The push rods (8) are threadedly connected.

6. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 4, characterized in that: The push rods (8) are mutually clamped.

7. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 1, characterized in that: The end of the screw rod (2) is provided with a positioning groove (21), and the end of the push rod (8) is inserted into the positioning groove (21).

8. The screw disassembly mechanism of the PAF tube single-screw extruder according to claim 1, characterized in that: The output shaft end of the driving member (7) is provided with a plug hole (71), and the end of the push rod (8) is plugged into the plug hole (71).

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