Double-screw extrusion device for luggage plates
By dividing the extrusion barrel into short splicing pipes and independently heating and insulation, the problem of inconvenient cleaning of the extrusion barrel length and poor temperature uniformity is solved, temperature partitioning and efficient melting are achieved, and maintenance and energy use are simplified.
Patent Information
- Application Number
- CN202420890736.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-26
AI Technical Summary
In the existing twin-screw extrusion device for bag sheets, the length of the extrusion barrel is not convenient for cleaning and maintenance. The single heating structure leads to poor temperature uniformity and cannot achieve temperature partitioning, which affects the efficient melting of plastic particles.
An extrusion cylinder composed of several short splicing pipes is used. Each short splicing pipe is independently heated and insulated. The temperature partition is achieved through the electric heating pipe and arc-shaped clamp structure, and an exhaust pipe and sealing ring are installed to facilitate plastic melting and gas. discharge.
The disassembly and cleaning of the extrusion cylinder is simplified, and the independent control of the temperature in the extrusion cylinder is achieved, the melting efficiency and energy utilization of plastic particles are improved, and the temperature inequality and the formation of pores are avoided.
Smart Images
Figure CN222246032U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bag production, in particular to a twin-screw extruder for bag plates. Background Art
[0002] In the production process of luggage with plastic shells, plastic sheets are usually formed into box shells through a vacuum forming machine, and plastic sheets are made of plastic particles through a screw extruder. In addition, due to the need to improve the strength and wear resistance of the box shell, reinforcing materials are added to the plastic particles and mixed together in the screw extruder. In order to improve the uniformity and efficiency of the mixing, a twin-screw extruder is usually used.
[0003] In the prior art, the utility model patent "A twin-screw extruder for luggage sheet materials" with patent number "CN216230685U" records: A twin-screw extruder for luggage sheet materials, including a base, a first motor is installed at the right end of the upper end face of the base, a gear box is installed at the driving end of the first motor, an extrusion barrel is installed on one side of the gear box, a support frame is fixed to the left end of the extrusion barrel, and the bottom end of the support frame is fixed to the upper end face of the base, a twin-screw body is arranged in the extrusion barrel, a mounting groove is opened in the extrusion barrel, a thermal insulation layer is fixed in the mounting groove, and a group of heating wires are symmetrically installed in the thermal insulation layer. The utility model drives the rotating shaft to rotate by the second motor, and the rotation of the rotating shaft drives the scraper to rotate, so that the inner wall of the feed hopper can be cleaned to avoid the phenomenon of agglomeration of the inner wall of the feed hopper, and no manual cleaning is required, thereby improving the cleaning efficiency, and no shutdown cleaning is required, thereby improving the working efficiency of the twin-screw extruder.
[0004] In the above-mentioned existing patents, plastic particles are heated and melted in an extrusion barrel. In order to ensure that the plastic particles can be fully melted, the length of the extrusion barrel is usually relatively long. Such a structure is not convenient for cleaning and maintaining the inside of the extrusion barrel; and only one group of heating wires is arranged on the extrusion barrel, so that the temperature at each location in the extrusion barrel is the same, and temperature zoning cannot be performed. Utility Model Content
[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a twin-screw extruder for luggage plates.
[0006] In order to achieve the above technical effects, the utility model adopts the following scheme:
[0007] A twin-screw extruder for luggage plates, comprising a base, a bracket, an extrusion barrel, a twin-screw output assembly, a feed hopper, a forming barrel and a motor;
[0008] The extrusion tube and the forming tube are installed on the base through a bracket, the forming tube is connected to one end of the extrusion tube, a forming hole is horizontally penetrated in the forming tube, the feed hopper is arranged at the upper end of the other end of the extrusion tube, and the twin-screw output assembly is rotatably installed in the extrusion tube and driven to rotate by a motor;
[0009] The extrusion tube is extended transversely and is mainly composed of a plurality of short spliced tubes arranged and spliced in a straight line. Two adjacent sections of the short spliced tubes are fixedly connected by flanges. A heating structure is provided on the short spliced tube, and an insulation structure is provided on the outside of the heating structure.
[0010] A preferred technical solution, the heating structure includes an electric heating tube, a first arc-shaped clamp and a second arc-shaped clamp; the electric heating tube is bolted around the outer wall of the short spliced tube, the first arc-shaped clamp and the second arc-shaped clamp are clamped on the outside of the short spliced tube from both sides in a clamp structure, the first arc-shaped clamp and the second arc-shaped clamp are located on the outside of the electric heating tube, and the first arc-shaped clamp and the second arc-shaped clamp are connected by bolt locking.
[0011] According to a preferred technical solution, the heat insulation structure is arranged on the inner walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate, and the heat insulation structure includes a heat insulation pad, and the heat insulation pad is fixed on the inner walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate.
[0012] According to a preferred technical solution, a plurality of protrusions are protruding from the inner walls of the first arc-shaped clamping plate and the second arc-shaped clamping plate and abut against the outer wall of the short splicing tube.
[0013] According to a preferred technical solution, an exhaust pipe communicating with the interior of the short spliced pipe is provided at the upper end of the short spliced pipe.
[0014] According to a preferred technical solution, a sealing ring is sandwiched between two adjacent short spliced pipes, and the inner diameter of the sealing ring is consistent with the inner diameter of the short spliced pipe.
[0015] Compared with the prior art, the beneficial effects are:
[0016] The utility model has a simple structure and is easy to use. Plastic particles are put into a hopper, and enter a short splicing pipe below through the hopper. A motor drives the twin-screw output assembly to rotate, so that the entered plastic particles are conveyed along a number of short splicing pipes spliced together toward the direction of the forming barrel. During the conveying process, the heating structure on the short splicing pipe heats and melts the plastic particles in the short splicing pipe, and finally the melted plastic is squeezed into the forming hole to be formed into a plate. Through the utility model, a long extrusion barrel is divided into a number of detachable short splicing pipes, which is convenient for disassembly for cleaning and maintenance; in addition, a heating structure is independently provided on each short splicing pipe, which is independently controlled, so that the temperature in the extrusion barrel can be divided, and the temperature at various places in the extrusion barrel can be adjusted according to needs, which is conducive to the efficient melting of plastic particles and can save energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a cross-sectional schematic diagram of the utility model;
[0018] Figure 2 It is a transverse cross-sectional schematic diagram of the medium and short spliced pipe of the utility model.
[0019] Figure numerals: 1. extrusion barrel; 2. forming barrel; 3. feed hopper; 4. twin-screw output assembly; 5. motor; 6. gear structure; 7. short-jointed pipe; 8. electric heating pipe; 9. second arc-shaped splint; 10. bump; 11. thermal insulation pad; 12. exhaust pipe; 13. sealing ring; 14. forming hole; 15. first arc-shaped splint. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0021] A twin-screw extruder for bag plates, comprising a base, a bracket, an extrusion barrel 1, a twin-screw output assembly 4, a feed hopper 3, a forming barrel 2 and a motor 5;
[0022] The extrusion tube 1 and the forming tube 2 are installed on the base through a bracket, the forming tube 2 is connected to one end of the extrusion tube 1, a forming hole 14 is horizontally penetrated in the forming tube 2, the feed hopper 3 is arranged at the upper end of the other end of the extrusion tube 1, the twin-screw output assembly 4 is rotatably installed in the extrusion tube 1 and driven to rotate by a motor 5, the twin-screw output assembly 4 adopts the existing technology, one end of the twin-screw output assembly 4 away from the forming tube 2 extends into the extrusion tube 1, and is connected to the output end of the motor 5 through a gear structure 6, and the structure in which the motor 5 drives the twin-screw output assembly 4 through the gear structure 6 adopts the existing technology;
[0023] The extrusion barrel 1 is arranged to extend transversely, and the extrusion barrel 1 is mainly composed of a plurality of short splicing pipes 7 arranged and spliced in a straight line, and two adjacent sections of the short splicing pipes 7 are fixedly connected by flanges, and one end of the plurality of short splicing pipes 7 connected together is flange-connected to the forming barrel 2, and a feed hopper 3 is installed on the upper end of a short splicing pipe 7 located at the other end thereof, and a twin-screw output assembly 4 extends from a short splicing pipe 7 at one end away from the forming barrel 2 and is connected to a motor 5;
[0024] The short-joined pipe 7 is provided with a heating structure, and the short-joined pipe 7 is provided with a heat insulating structure located outside the heating structure.
[0025] The plastic particles are put into the hopper, and enter into a short splicing pipe 7 below through the hopper. The motor 5 drives the twin-screw output assembly 4 to rotate, so that the entered plastic particles are transported along the short splicing pipes 7 spliced together toward the forming barrel 2. During the transportation process, the heating structure on the short splicing pipe 7 heats and melts the plastic particles in the short splicing pipe 7, and finally squeezes the melted plastic into the forming hole 14 to form a plate. Through the utility model, the long extrusion barrel 1 is divided into several detachable short splicing pipes 7, which is convenient for disassembly for cleaning and maintenance. In addition, each short splicing pipe 7 is independently provided with a heating structure and independently controlled, so that the temperature zoning in the extrusion barrel 1 can be achieved.
[0026] A preferred technical solution, the heating structure includes an electric heating tube 8, a first arc-shaped clamp 15 and a second arc-shaped clamp 9; the electric heating tube 8 is bolted around the outer wall of the short spliced tube 7, the first arc-shaped clamp 15 and the second arc-shaped clamp 9 are clamped on the outside of the short spliced tube 7 from both sides in a hoop structure, the first arc-shaped clamp 15 and the second arc-shaped clamp 9 are located on the outside of the electric heating tube 8, the first arc-shaped clamp 15 and the second arc-shaped clamp 9 are connected by bolt locking, and the heat emitted by the electric heating tube 8 is transferred to the short spliced tube 7 for heating.
[0027] A preferred technical solution, the thermal insulation structure is arranged on the inner walls of the first arc-shaped clamp plate 15 and the second arc-shaped clamp plate 9, and the thermal insulation structure includes a thermal insulation pad 11, and the thermal insulation pad 11 is fixed on the inner walls of the first arc-shaped clamp plate 15 and the second arc-shaped clamp plate 9. The thermal insulation pad 11 arranged on the outside of the electric heating tube 8 prevents the heat emitted by the electric heating tube 8 from being transferred outward to cause heat loss and prevents burns.
[0028] According to a preferred technical solution, a plurality of protrusions 10 are protruded from the inner walls of the first arc-shaped clamping plate 15 and the second arc-shaped clamping plate 9, which are pressed against the outer wall of the short spliced tube 7. The first arc-shaped clamping plate 15 and the second arc-shaped clamping plate 9 are supported by the protrusions 10 to form an installation gap between the outer wall of the short spliced tube 7 and the first arc-shaped clamping plate 15, and between the outer wall of the short spliced tube 7 and the second arc-shaped clamping plate 9. The electric heating tube 8 is located in the installation gap to prevent the first arc-shaped clamping plate 15 and the second arc-shaped clamping plate 9 from directly pressing on the electric heating tube 8 and causing damage to the electric heating tube 8.
[0029] According to a preferred technical solution, an exhaust pipe 12 connected to the short-jointed tube 7 is provided at the upper end of the short-jointed tube 7. When the feeding hopper is feeding materials, air will flow into the short-jointed tubes 7 along the feeding hopper. After the plastic is melted, if the air cannot be discharged, it will easily mix in the molten plastic, thereby causing air holes in the extruded luggage sheet. According to this solution, an exhaust pipe 12 is provided to facilitate the discharge of gas in the short-jointed tube 7.
[0030] According to a preferred technical solution, a sealing ring 13 is sandwiched between two adjacent short joint pipes 7 , and the inner diameter of the sealing ring 13 is consistent with the inner diameter of the short joint pipe 7 .
[0031] In the description of the present utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.
[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0033] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
Claims
1. A twin-screw extruder for luggage sheets, characterized in that: It comprises a base, a bracket, an extrusion barrel (1), a twin-screw output assembly (4), a feed hopper (3), a molding barrel (2) and a motor (5); The extrusion cylinder (1) and the forming cylinder (2) are mounted on a base via a bracket, the forming cylinder (2) is connected to one end of the extrusion cylinder (1), a forming hole (14) is horizontally penetrated in the forming cylinder (2), the feed hopper (3) is arranged at the upper end of the other end of the extrusion cylinder (1), and the twin-screw output assembly (4) is rotatably mounted in the extrusion cylinder (1) and driven to rotate by a motor (5); The extrusion tube (1) is arranged to extend transversely, and is mainly composed of a plurality of short splicing tubes (7) arranged and spliced in a straight line, two adjacent sections of the short splicing tubes (7) are fixedly connected by flanges, a heating structure is provided on the short splicing tube (7), and a heat insulation structure is provided on the short splicing tube (7) located outside the heating structure.
2. A twin-screw extruder for bag sheets as claimed in claim 1, characterized in that: The heating structure comprises an electric heating tube (8), a first arc-shaped clamping plate (15) and a second arc-shaped clamping plate (9); the electric heating tube (8) is wound around the outer wall of the short splicing tube (7) in a bolted manner, the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9) are clamped on the outer side of the short splicing tube (7) from both sides in a clamping structure, the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9) are located on the outer side of the electric heating tube (8), and the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9) are connected by bolt locking.
3. A twin-screw extruder for bag sheet material as claimed in claim 2, characterized in that: The heat insulation structure is arranged on the inner walls of the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9), and the heat insulation structure comprises a heat insulation pad (11), and the heat insulation pad (11) is fixed on the inner walls of the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9).
4. A twin-screw extruder for bag sheet material as claimed in claim 3, characterized in that: A plurality of protrusions (10) are protruding from the inner walls of the first arc-shaped clamping plate (15) and the second arc-shaped clamping plate (9) and are pressed against the outer wall of the short splicing pipe (7).
5. A twin-screw extruder for bag sheet material according to claim 1, characterized in that: An exhaust pipe (12) communicating with the interior of the short spliced pipe (7) is provided at the upper end of the short spliced pipe (7).
6. A twin-screw extruder for bag sheets as claimed in claim 1, characterized in that: A sealing ring (13) is sandwiched between two adjacent short splicing pipes (7), and the inner diameter of the sealing ring (13) is consistent with the inner diameter of the short splicing pipe (7).