Extrusion structure for TPU efficient blow molding unit

Abstract

The utility model relates to the technical field of extrusion structures, and discloses an extrusion structure for a TPU (thermoplastic polyurethane) efficient blow molding unit, which comprises a shell, one side of the upper end of the shell is communicated with a feeding hopper, a pneumatic extrusion rod is detachably mounted at the upper end of an inner cavity of the shell, a spray head is detachably mounted in the middle of one side of the shell, and a servo motor is fixedly mounted on the other side of the upper end of the shell. According to the technical scheme, the shell, the rubber plugging strip and the connecting rod are arranged, in the using process, the two-way lead screw can be matched with the lead screw sleeve to drive the shielding strip to move towards the middle, the shielding strip is matched with the rubber plugging strip to shield and plug the nozzle, and the phenomenon that in the extrusion process of liquid plastic, the nozzle cannot be blocked is avoided. The situation that follow-up cleaning operation is affected due to the fact that a nozzle is adhered and blocked by liquid plastic is avoided, and when the interior of the shell needs to be cleaned, a shielding strip drives a scraping ring to conduct scraping in the shell, so that liquid plastic residues attached to the inner wall of the shell are scraped away, and the cleaning efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion structures, in particular to an extrusion structure for a TPU high-efficiency blow molding machine unit. Background Art

[0002] The central control blow molding machine is a plastic processing machine. After the liquid plastic is extruded through the extrusion device, the wind blown out by the machine is used to blow the plastic body into a mold cavity of a certain shape to make a product. This machine is called a hollow blow molding machine, so the extrusion device of the hollow blow molding machine is a very important step in the blow molding process.

[0003] After searching, the publication number is (CN213500720U), which discloses a high-efficiency extrusion device for a hollow blow molding machine, including a shell, a motor is fixedly connected to the outer wall at the left end of the top of the shell, and a motor is fixedly connected to the outer wall at the right end of the top of the shell. The motor passes through the outer wall of the shell to the inner wall and is connected to a rotating shaft through a coupling, the front and rear ends of the outer wall of the rotating shaft are fixedly connected to a first extrusion plate, the left and right ends of the outer wall of the rotating shaft are fixedly connected to a second extrusion plate, the middle outer wall of the shell is fixedly connected to a pneumatic interface, and the pneumatic interface passes through the outer wall of the shell to the inner wall and is fixedly connected to a support tube.

[0004] When implementing this technical solution, there are at least the following defects: although the utility model is provided with a nozzle and other structures to facilitate cleaning of the inside of the shell, the nozzle is easily attached and blocked by liquid plastic during the extrusion process because the nozzle is arranged inside the shell, thereby affecting the subsequent cleaning operation, and it is urgently needed to be improved. Therefore, we propose an extrusion structure for a TPU high-efficiency blow molding unit. Utility Model Content

[0005] The utility model aims to provide an extrusion structure for a TPU high-efficiency blow molding unit, which solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an extrusion structure for a TPU high-efficiency blow molding unit, comprising a shell, one side of the upper end of the shell is connected to a feed funnel, a pneumatic extrusion rod is detachably installed on the upper end of the inner cavity of the shell, a nozzle is detachably installed in the middle of one side of the shell, a servo motor is fixedly installed on the other side of the upper end of the shell, a bidirectional screw is installed on the output end of the servo motor, a shielding strip is provided on one side of the nozzle, a rubber sealing strip is bonded to one side of the shielding strip, and a plurality of scraper rings are welded to the upper end of the shielding strip.

[0007] By adopting the above technical solution, it is convenient to shield and seal the nozzle by means of the shielding strip in cooperation with the rubber sealing strip, so as to avoid the nozzle being stuck and blocked by the liquid plastic during the extrusion of the liquid plastic, thereby affecting the subsequent cleaning operation. At the same time, when it is necessary to open the shielding strip to clean the inside of the shell, the movement of the shielding strip is controlled by the servo motor. During the movement of the shielding strip, the shielding strip will drive the scraper ring to scrape inside the shell, thereby scraping off the liquid plastic residue attached to the inner wall of the shell, thereby further improving the cleaning efficiency.

[0008] Optionally, a screw sleeve is fixedly installed on the other side of the shielding strip, and the bidirectional screw is threadedly connected to the screw sleeve.

[0009] By adopting the above technical solution, it is convenient to drive the shielding strip to move.

[0010] Optionally, the size of the rubber sealing strip is adapted to the size of the nozzle.

[0011] By adopting the above technical solution, the sealing effect of the rubber sealing strip can be ensured.

[0012] Optionally, the lower end of the shell is connected to an extrusion port, and the extrusion end of the pneumatic extrusion rod is arranged directly above the extrusion port.

[0013] By adopting the above technical solution, it is convenient to extrude liquid plastic.

[0014] Optionally, a connecting rod is welded between the scraper rings, and the scraper rings are in contact with the inner wall of the shell.

[0015] By adopting the above technical solution, it is convenient to drive multiple scraper rings to move.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] The technical solution of the present application is provided with a shell, a pneumatic extrusion rod, an extrusion port, a servo motor, a shielding strip, a rubber sealing strip and a connecting rod. When in use, the bidirectional screw can cooperate with the screw sleeve to drive the shielding strip to move toward the middle, and the shielding strip cooperates with the rubber sealing strip to shield and seal the nozzle, so as to avoid the nozzle being blocked by the liquid plastic during the extrusion of the liquid plastic, thereby affecting the subsequent cleaning operation. When the interior of the shell needs to be cleaned, the shielding strip can drive the scraper ring to scrape inside the shell, so as to scrape off the liquid plastic residue attached to the inner wall of the shell, thereby further improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of an extrusion structure for a TPU high-efficiency blow molding unit of the utility model;

[0020] Figure 2 It is a schematic diagram of the partially enlarged structure of position A of the extrusion structure for a TPU high-efficiency blow molding unit of the utility model.

[0021] In the figure: 1. Shell; 11. Feed funnel; 12. Pneumatic extrusion rod; 13. Extrusion port; 14. Nozzle; 2. Servo motor; 21. Bidirectional screw; 22. Shielding strip; 23. Screw sleeve; 24. Rubber sealing strip; 3. Scraper ring; 4. Connecting rod. DETAILED DESCRIPTION

[0022] See also Figure 1-2 The utility model provides a technical solution: an extrusion structure for a TPU high-efficiency blow molding unit, comprising a shell 1, one side of the upper end of the shell 1 is connected with a feed funnel 11, a pneumatic extrusion rod 12 is detachably installed on the upper end of the inner cavity of the shell 1, a nozzle 14 is detachably installed in the middle of one side of the shell 1, a servo motor 2 is fixedly installed on the other side of the upper end of the shell 1, a bidirectional screw 21 is installed on the output end of the servo motor 2, a shielding strip 22 is arranged on one side of the nozzle 14, a rubber sealing strip 24 is bonded to one side of the shielding strip 22, a plurality of scraper rings 3 are welded to the upper end of the shielding strip 22, an extrusion port 13 is connected to the lower end of the shell 1, the extrusion end of the pneumatic extrusion rod 12 is arranged just above the extrusion port 13, a connecting rod 4 is welded between the scraper rings 3, and the scraper rings 3 are in contact with the inner wall of the shell 1.

[0023] A screw sleeve 23 is fixedly installed on the other side of the shielding strip 22, and the bidirectional screw 21 is threadedly connected to the screw sleeve 23 to facilitate driving the shielding strip 22 to move.

[0024] The size of the rubber sealing strip 24 is matched with the size of the nozzle 14 , so as to ensure the sealing effect of the rubber sealing strip 24 .

[0025] During use, the servo motor 2 rotates forward, so that the bidirectional screw rod 21 cooperates with the screw rod sleeve 23 to drive the shielding strip 22 to move toward the middle, and the shielding strip 22 cooperates with the rubber sealing strip 24 to block and block the nozzle 14 to prevent the nozzle 14 from being adhered and blocked by the liquid plastic during the extrusion of the liquid plastic, thereby affecting the subsequent cleaning operation. At the same time, when the inside of the shell 1 needs to be cleaned, the shielding strip 22 is controlled to move by the servo motor 2. During the movement of the shielding strip 22, the shielding strip 22 will drive the scraper ring 3 to scrape inside the shell 1, thereby scraping off the liquid plastic residue attached to the inner wall of the shell 1, further improving the cleaning efficiency.

Claims

1. An extrusion structure for a TPU high-efficiency blow molding unit, comprising a housing (1), characterized in that: One side of the upper end of the shell (1) is connected to a feed hopper (11), a pneumatic extrusion rod (12) is detachably mounted on the upper end of the inner cavity of the shell (1), a nozzle (14) is detachably mounted in the middle of one side of the shell (1), a servo motor (2) is fixedly mounted on the other side of the upper end of the shell (1), a bidirectional screw rod (21) is mounted on the output end of the servo motor (2), a shielding strip (22) is arranged on one side of the nozzle (14), a rubber sealing strip (24) is bonded to one side of the shielding strip (22), and a plurality of scraper rings (3) are welded to the upper end of the shielding strip (22).

2. The extrusion structure for a TPU high-efficiency blow molding unit according to claim 1, characterized in that: A screw sleeve (23) is fixedly mounted on the other side of the shielding strip (22), and the bidirectional screw (21) is threadedly connected to the screw sleeve (23).

3. The extrusion structure for a TPU high-efficiency blow molding unit according to claim 1, characterized in that: The size of the rubber sealing strip (24) is adapted to the size of the nozzle (14).

4. The extrusion structure for a TPU high-efficiency blow molding unit according to claim 1, characterized in that: The lower end of the housing (1) is connected to an extrusion port (13), and the extrusion end of the pneumatic extrusion rod (12) is arranged directly above the extrusion port (13).

5. The extrusion structure for a TPU high-efficiency blow molding unit according to claim 1, characterized in that: A connecting rod (4) is welded between the scraper rings (3), and the scraper rings (3) are in contact with the inner wall of the shell (1).

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