Screw structure of extruder

Abstract

The utility model discloses a screw structure of an extruder. The problem that an existing extruder screw is short in service life is mainly solved. The transmission structure is characterized by further comprising a bush (4), a plurality of transmission grooves (41) are formed in the circumferential inner wall of the bush, and transmission keys (31) matched with the transmission grooves are arranged on the outer wall of the mounting section; a first mounting hole (42) is formed in the bushing, a second mounting hole (43) is formed in the outer wall of the mounting section, and the first mounting hole and the second mounting hole are oppositely formed and used for mounting a fastener (8). The utility model provides a screw rod structure of an extruder, which transmits torque through key transmission and screw connection, and is longer in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder field, concretely relates to a screw structure of extruder. BACKGROUND

[0002] The screw extruder is by the pressure and shearing force of screw rotation, can make material can fully plasticize and uniformly mix, through the die forming.

[0003] The screw of extruder and the shell are usually installed through the bush, and the conventional bush is only connected on the screw through the screw, and the service life is not long under the excessive force. UTILITY MODEL CONTENTS

[0004] In order to overcome the insufficient of background art, the utility model provides a screw structure of extruder, mainly solves the problem of short service life of current extruder screw.

[0005] The utility model discloses a screw structure of extruder, which comprises a rod body, a screw rib section and an installation section are arranged on the circumferential outer wall of the rod body, and further comprises

[0006] A screw structure of extruder, comprising a rod body, a screw rib section and an installation section are arranged on the circumferential outer wall of the rod body, and further comprises

[0007] A bush, a plurality of transmission grooves are arranged on the circumferential inner wall of the bush, and a transmission key matched with the transmission grooves is arranged on the outer wall of the installation section; a first mounting hole is arranged on the bush, a second mounting hole is arranged on the outer wall of the installation section, and the first mounting hole and the second mounting hole are arranged oppositely for fastener installation.

[0008] A plurality of balls are arranged on the top end surface of the transmission key, and the balls are in rolling cooperation with the inner wall of the bush.

[0009] The screw rib section comprises a mixing section and a smelting section, and the mixing section and the smelting section are alternately arranged.

[0010] A detachable taper head is arranged on the rod body.

[0011] A part of the mixing section is provided with a cutout.

[0012] A flange is arranged at the tail end of the bush.

[0013] A boss is arranged on the taper head, a thread is arranged on the circumferential outer wall of the boss, a sink groove is arranged on the rod body, and an internal thread matched with the thread is arranged on the sink groove.

[0014] The utility model has the advantages that the utility model provides a screw structure of extruder, which transmits torque through key transmission cooperation and screw connection, and has a longer service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1It is a three-dimensional schematic view of one embodiment of the utility model.

[0016] Figure 2 It is a partial three-dimensional schematic view of one embodiment of the utility model.

[0017] Figure 3 It is a partial sectional view schematic view of one embodiment of the utility model.

[0018] Figure 4 It is a partial sectional view schematic view of one embodiment of the utility model.

[0019] Figure 5 It is a partial sectional view schematic view of one embodiment of the utility model. Specific implementation

[0020] The utility model discloses a kind of screw rod structures of extruder, including stem 1, the circumferential outer wall of the stem is equipped with screw rib section 2 and installation section 3, further including bushing 4, the circumferential inner wall of the bushing is equipped with several transmission grooves 41, the outer wall of the installation section is equipped with transmission key 31 compatible with the transmission groove;First mounting hole 42 is equipped on the bushing, the outer wall of the installation section is equipped with second mounting hole 43, the first mounting hole is oppositely arranged with the second mounting hole for fastener 8 installation.The force suffered by fastener can be greatly reduced by key transmission, increase service life.

[0021] In the embodiment, as shown in the drawing, the top end surface of the transmission key is equipped with several ball bearings 411, and the ball bearings are in rolling fit with the inner wall of the bushing. The top of the key is installed with ball bearings to reduce the friction of assembly, and the sidewalls on both sides are used to transmit torque. Ball grooves can be provided on the top of the key to install ball bearings.

[0022] In the embodiment, as shown in the drawing, the screw rib section includes mixing section 21 and smelting section 22, and the mixing section and the smelting section are alternately arranged. The mixing effect is better.

[0023] In the embodiment, as shown in the drawing, the stem is provided with a detachable taper head 5.

[0024] In the embodiment, as shown in the drawing, part of the mixing section is provided with a cutout 211.

[0025] In the embodiment, as shown in the drawing, the tail end of the bushing is provided with a flange 44. The flange is arranged opposite to the screw rib in the axial direction and plays a limiting role.

[0026] In the embodiment, as shown in the drawing, the taper head is provided with a boss 51, the circumferential outer wall of the boss is provided with threads, the stem is provided with a sunken groove, and the sunken groove is provided with internal threads matched with the threads. Disassembly and assembly are relatively convenient.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A screw structure for an extruder, comprising a rod body (1), wherein the circumferential outer wall of the rod body is provided with a helical rib section (2) and an mounting section (3), characterized in that: Also includes The bushing (4) has a plurality of transmission grooves (41) on its circumferential inner wall and a transmission key (31) adapted to the transmission grooves on the outer wall of the mounting section; the bushing has a first mounting hole (42) and the outer wall of the mounting section has a second mounting hole (43), the first mounting hole and the second mounting hole are arranged opposite to each other for fastener (8) installation.

2. The screw structure of an extruder according to claim 1, characterized in that: The top end face of the transmission key is provided with a plurality of balls (411), which roll in contact with the inner wall of the bushing.

3. The screw structure of an extruder according to claim 2, characterized in that: The spiral section includes a mixing section (21) and a smelting section (22), which are carried out alternately.

4. The screw structure of an extruder according to claim 3, characterized in that: The rod is provided with a detachable cone (5).

5. The screw structure of an extruder according to claim 4, characterized in that: The mixing section is provided with a cut (211).

6. The screw structure of an extruder according to claim 5, characterized in that: The bushing has a flange (44) at its tail end.

7. The screw structure of an extruder according to claim 6, characterized in that: The cone head is provided with a boss (51), the outer wall of the boss is provided with a thread, the rod body is provided with a groove, and the groove is provided with an internal thread that matches the thread.

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