Double-helix plastic extruder

Abstract

The utility model discloses a double-helix plastic extruder which comprises an extruder body, an extrusion shaft is installed in the extruder body, a discharging pipe is fixedly welded to the interior of one side of the extruder body, a screw is connected to the interior of the discharging pipe through threads, a rotating block is connected to the outer side of the screw in a sleeved mode, and a supporting block is fixedly welded to the outer side of the discharging pipe. According to the double-helix plastic extruder, by rotating the rotating block, the extrusion head is unconstrained, the extrusion head is conveniently moved upwards to drive the positioning pin to be separated from the clamped supporting block, so that the extrusion head is conveniently replaced, and by rotating and screwing the screw, the extrusion head can be conveniently replaced, so that the extrusion head can be conveniently replaced. The rotating block is driven to cling to the extrusion head to facilitate fixed installation of the extrusion head; the cutter back is connected with the clamping block in a clamped mode, the hexagon socket head cap screw is rotated and screwed, the cutter is conveniently and fixedly installed, the cutter is installed at one end of the extrusion shaft and can be driven to rotate, and therefore raw materials extruded by the discharging pipe are cut.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder devices, in particular to a double-screw plastic extruder. Background Art

[0002] In plastic extrusion molding equipment, plastic extruder is usually called the main machine, and the subsequent equipment plastic extrusion molding machine is called the auxiliary machine. After more than 100 years of development, the plastic extruder has evolved from the original single screw to twin-screw, multi-screw, and even screw-free models. The plastic extruder (main machine) can be matched with various plastic molding auxiliary machines such as pipes, films, holding materials, monofilaments, flat wires, strapping tapes, extruded nets, plates, profiles, granulation, cable coating, etc. to form various plastic extrusion molding production lines and produce various plastic products. Therefore, plastic extrusion molding machinery is one of the widely used machines in the plastic processing industry now or in the future.

[0003] At present, a discharge port is opened on the right side of the existing plastic extruder, which can realize preheating of the plastic raw material before the feed barrel, increase the temperature of the plastic raw material when it enters the feed barrel, make the raw material mixing more uniform, extruded plastic molding faster, and increase the production quality of the product.

[0004] For example, a double-screw plastic extruder disclosed in the authorization number CN213472148U includes a plastic extruder, a base is fixedly connected at the four corners of the lower end of the plastic extruder, a pair of motor bases are provided on the left side of the plastic extruder, a motor is installed on the upper end of the motor base, a rotating groove is cut on the left side wall of the plastic extruder, a rotating shaft is fixedly connected to the power output end of the motor, and the rotating shaft passes through the rotating groove and extends into the plastic extruder, a spiral extrusion shaft is fixedly connected to the end of the rotating shaft away from the motor, an insulation layer is fixedly connected inside the plastic extruder, and the insulation layer surrounds the outer side of the spiral extrusion shaft, The right side of the plastic extruder is provided with a discharge port, the upper end of the plastic extruder is provided with a feed port, the upper end of the plastic extruder is installed with a heat source generator, the heat source generator is located on the left side of the feed port, the feed port is provided with a heat conduction hole, the power output end of the heat source generator is connected with a heat conduction pipe, the end of the heat conduction pipe away from the heat source generator is fixedly connected with a heating pipe, and the heating pipe is located at the inner end of the feed port, so that preheating can be achieved before the plastic raw material feed barrel, and the temperature of the plastic raw material when entering the feed barrel can be increased, so that the raw materials can be mixed more evenly, the extruded plastic can be formed faster, and the production quality of the product can be increased. However, such a double-screw plastic extruder is not convenient for removing the extrusion head, and it is not convenient to cut the extruded raw materials.

[0005] It can be seen from the solutions disclosed in the above-mentioned existing patent documents that it is inconvenient to remove the extrusion head and it is inconvenient to cut the extruded raw materials. Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The utility model aims to provide a double-screw plastic extruder to solve the problem that it is inconvenient to remove the extrusion head and to cut the extruded raw materials.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-screw plastic extruder, comprising an extruder, an extrusion shaft is installed inside the extruder, a discharge pipe is fixedly welded inside one side of the extruder, a screw is threadedly connected to the inside of the discharge pipe, a rotating block is sleeved on the outside of the screw, a support block is fixedly welded to the outside of the discharge pipe, a positioning pin is clamped inside the support block, one end of the extrusion shaft is tightly attached to the back of a knife, a hexagon socket screw is sleeved inside the back of the knife, and a clamping block is fixedly welded to one end of the extrusion shaft.

[0008] Preferably, the upper end of the discharge pipe is close to the rotating block, and a cutting knife is provided on the inner side of the knife back. By rotating the rotating block, the extruder head is freed from restraint, and the extruder head is conveniently moved upward to drive the positioning pin to disengage from the clamping support block, so as to replace the extruder head.

[0009] Preferably, one side of the discharge pipe is closely attached to the extrusion head, and one end of the positioning pin is fixedly connected to the extrusion head. By turning the tightening screw, the rotating block is driven to be closely attached to the extrusion head, so that the extrusion head is conveniently fixed and installed.

[0010] Preferably, one end of the extrusion shaft is connected to the hexagon socket screw through a thread, and the clamping block is designed as a square structure. The cutting knife can be conveniently fixed and installed by clamping the knife back to the clamping block and tightening the hexagon socket screw.

[0011] Preferably, the lower end surface of the rotating block is in close contact with an extrusion head, and a cutting knife is installed on one side of the extrusion head. By installing the cutting knife at one end of the extrusion shaft, it can be driven to rotate, thereby cutting the raw materials extruded from the discharge pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The upper end of the discharge pipe of the utility model is close to the rotating block, and a cutting knife is arranged on the inner side of the knife back. By rotating the rotating block, the extruder head is freed from restraint, and the extruder head is conveniently moved upward to drive the positioning pin to disengage from the clamping support block, so as to replace the extruder head.

[0014] 2. One side of the discharge pipe of the utility model is closely attached to the extruder head, and one end of the positioning pin is fixedly connected to the extruder head. By turning the tightening screw, the rotating block is driven to be closely attached to the extruder head, so that the extruder head is conveniently fixed and installed.

[0015] 3. One end of the extrusion shaft of the utility model is connected to the hexagon socket screw through a thread, and the clamping block is designed as a square structure. By clamping the knife back to the clamping block and turning and tightening the hexagon socket screw, the cutting knife can be conveniently fixed and installed.

[0016] 4. The lower end surface of the rotating block of the utility model is closely attached to the extrusion head, and a cutting knife is installed on one side of the extrusion head. By installing the cutting knife on one end of the extrusion shaft, it can be driven to rotate, thereby cutting the raw materials extruded from the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is an enlarged view of the discharge pipe of the utility model;

[0019] Figure 3 It is an enlarged view of the right side of the knife back of the utility model.

[0020] In the figure: 1 extruder, 11 extrusion shaft, 12 discharge pipe, 13 screw, 14 rotating block, 15 support block, 16 positioning pin, 17 extrusion head, 2 knife back, 21 hexagon socket screw, 22 clamping block, 23 cutting knife. DETAILED DESCRIPTION

[0021] 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 in 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. Example

[0022] See also Figure 1-3 A double-screw plastic extruder shown in the figure includes an extruder 1, an extrusion shaft 11 is installed inside the extruder 1, a discharge pipe 12 is fixedly welded inside one side of the extruder 1, a screw 13 is threadedly connected inside the discharge pipe 12, a rotating block 14 is sleeved on the outside of the screw 13, a support block 15 is fixedly welded on the outside of the discharge pipe 12, a positioning pin 16 is clamped inside the support block 15, one end of the extrusion shaft 11 is tightly attached to the blade back 2, a hexagon socket screw 21 is sleeved inside the blade back 2, and a clamping block 22 is fixedly welded on one end of the extrusion shaft 11.

[0023] In order to disassemble the extruder head 17 and replace it with other types of extruder heads 17, the upper end of the discharge pipe 12 is close to the rotating block 14, and a cutting knife 23 is provided on the inner side of the knife back 2. By rotating the rotating block 14, the extruder head 17 is freed from restraint, and the extruder head 17 is conveniently moved upward to drive the positioning pin 16 to disengage from the clamping support block 15, so as to replace the extruder head 17. One side of the discharge pipe 12 is close to the extruder head 17, and one end of the positioning pin 16 is fixedly connected to the extruder head 17. By rotating the tightening screw 13, the rotating block 14 is driven to be close to the extruder head 17, so that the extruder head 17 is conveniently fixed and installed.

[0024] In this embodiment, by rotating the rotating block 14, the extruder head 17 is freed from its restraint, and the extruder head 17 is conveniently moved upward to drive the positioning pin 16 to disengage from the clamping support block 15, so as to replace the extruder head 17. By rotating the tightening screw 13, the rotating block 14 is driven to be close to the extruder head 17, so as to facilitate the fixed installation of the extruder head 17. Example

[0025] See also Figure 1-3 The present embodiment further explains Example 1. The figure shows a double-screw plastic extruder, including an extruder 1. An extrusion shaft 11 is installed inside the extruder 1. A discharge pipe 12 is fixedly welded inside one side of the extruder 1. A screw 13 is threadedly connected inside the discharge pipe 12. A rotating block 14 is sleeved on the outside of the screw 13. A support block 15 is fixedly welded on the outside of the discharge pipe 12. A positioning pin 16 is clamped inside the support block 15. A knife back 2 is tightly attached to one end of the extrusion shaft 11. A hexagon socket screw 21 is sleeved inside the knife back 2. A clamping block 22 is fixedly welded on one end of the extrusion shaft 11.

[0026] In order to facilitate the cutting of the extruded raw materials, one end of the extrusion shaft 11 is connected to the hexagon socket screw 21 through a threaded connection, and the clamping block 22 is designed as a square structure. By clamping the knife back 2 to the clamping block 22 and rotating and tightening the hexagon socket screw 21, the cutting knife 23 can be fixed and installed conveniently. The lower end surface of the rotating block 14 is closely attached to the extrusion head 17, and the cutting knife 23 is installed on one side of the extrusion head 17. By installing the cutting knife 23 at one end of the extrusion shaft 11, it can be driven to rotate, thereby cutting the raw materials extruded from the discharge pipe 12.

[0027] In this embodiment, the cutting knife 23 is conveniently fixed and installed by clamping the knife back 2 with the clamping block 22 and rotating and tightening the hexagon socket screw 21. By installing the cutting knife 23 at one end of the extrusion shaft 11, it can be driven to rotate, thereby cutting the raw materials extruded from the discharge pipe 12.

[0028] The double-screw plastic extruder releases the restraint of the extrusion head 17 by rotating the rotating block 14, and facilitates the upward movement of the extrusion head 17 to drive the positioning pin 16 to disengage from the clamping support block 15, so as to replace the extrusion head 17; the rotating block 14 is driven to be close to the extrusion head 17 by rotating the tightening screw 13, so as to facilitate the fixed installation of the extrusion head 17; the cutting knife 23 is conveniently fixedly installed by clamping the knife back 2 with the clamping block 22 and rotating and tightening the hexagon socket screw 21; and the cutting knife 23 is installed at one end of the extrusion shaft 11, so that it can be driven to rotate, thereby cutting the raw materials extruded from the discharge pipe 12.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw plastic extruder, comprising an extruder (1), characterized in that: An extrusion shaft (11) is installed inside the extruder (1), a discharge pipe (12) is fixedly welded inside one side of the extruder (1), a screw (13) is threadedly connected inside the discharge pipe (12), a rotating block (14) is sleeved on the outside of the screw (13), a support block (15) is fixedly welded on the outside of the discharge pipe (12), a positioning pin (16) is clamped inside the support block (15), one end of the extrusion shaft (11) is tightly attached to the knife back (2), a hexagon socket screw (21) is sleeved inside the knife back (2), and a clamping block (22) is fixedly welded on one end of the extrusion shaft (11).

2. A twin-screw plastic extruder according to claim 1, characterized in that: The upper end of the discharge pipe (12) is in close contact with the rotating block (14), and a cutting knife (23) is provided on the inner side of the knife back (2).

3. A twin-screw plastic extruder according to claim 1, characterized in that: An extrusion head (17) is closely attached to one side of the discharge pipe (12), and one end of the positioning pin (16) is fixedly connected to the extrusion head (17).

4. A twin-screw plastic extruder according to claim 1, characterized in that: One end of the extrusion shaft (11) is threadedly connected to a hexagon socket screw (21), and the clamping block (22) is designed as a square structure.

5. A twin-screw plastic extruder according to claim 1, characterized in that: The lower end surface of the rotating block (14) is in close contact with an extrusion head (17), and a cutting knife (23) is installed on one side of the extrusion head (17).

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