Screw charging barrel of polyurethane injection molding machine
By adding graphene nanoheating elements in the screw, the problem of high screw stress when heating the polyurethane melt by the conveyor cylinder is solved, and efficient mixing and temperature uniformity of the polyurethane melt are achieved.
Patent Information
- Application Number
- CN202323195677.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-27
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-11-27
AI Technical Summary
In reciprocating screw injection molding machine, when the polyurethane melt is heated by the feed barrel alone, the shear and friction of the polyurethane melt produce greater stress on the screw, affecting the working efficiency and causing uneven temperature in the melt.
A graphene nanoheating element is added in the screw, and the polyurethane melt is softened by rotating the screw, and the screw stress is reduced through axial movement, lateral flow and cyclic movement, promoting melt mixing and improving temperature uniformity.
Through the use of graphene nanoheating elements, screw stress is reduced and the mixing effect and temperature uniformity of polyurethane melt are significantly improved.
Smart Images
Figure CN222156542U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of screw barrels, and in particular relates to a screw barrel of a polyurethane injection molding machine. Background Art
[0002] Reciprocating screw injection molding machines are widely used in injection molding machines. The components of reciprocating screw injection molding machines that plasticize polyurethane are the screw and the feed barrel. The polyurethane melt entering the feed barrel is heated and softened by the feed barrel. Due to the rotation of the screw, the softened polyurethane melt is continuously fed to the nozzle for plasticization and molding.
[0003] However, since the polyurethane melt is heated by the feed barrel alone, shear and friction occur in the polyurethane melt when the screw rotates, which causes greater stress on the screw, affecting the working efficiency to a certain extent, thereby affecting the mixing effect of the polyurethane melt and causing the temperature in the melt to be uneven. Summary of the invention
[0004] In order to solve the above-mentioned problems, the utility model discloses a screw barrel of a polyurethane injection molding machine. A graphene nano-heating element is added inside the screw. While the screw rotates, the polyurethane melt is heated and softened. While the polyurethane melt has axial movement, lateral flow and swirling motion, the stress on the screw is reduced. These different forms of movement and work greatly promote the mixing effect of the polyurethane melt, so that the temperature inside the polyurethane melt reaches a high uniformity.
[0005] In order to achieve the above purpose, the specific technical solution of this application is as follows:
[0006] A screw barrel of a polyurethane injection molding machine comprises a feed hopper, a delivery barrel and a control panel, wherein a screw is arranged in the delivery barrel, a nozzle is arranged at the front end of the delivery barrel, graphene nano heating elements are arranged inside the delivery barrel and inside the screw, the screw is driven to rotate by a driving motor, and a support seat is arranged below the delivery barrel.
[0007] Based on the above technical features, further, spiral feeding pieces are provided at equal intervals on the periphery of the screw, and the screw and the feeding pieces are both made of stainless steel.
[0008] Based on the above technical features, preferably, the nozzle is threadedly connected to the feed barrel, and the nozzle can be replaced with different calibers, which has better flexibility.
[0009] Based on the above technical features, preferably, a graphene nano heating element is also provided inside the nozzle to facilitate rapid discharge of the polyurethane material.
[0010] Based on the above technical features, preferably, the feed hopper is welded and fixed above the rear end of the feeding barrel.
[0011] Based on the above technical features, preferably, the feed tube is wrapped with a thermal insulation layer.
[0012] Compared with the prior art, the beneficial effects of this application are:
[0013] The present application discloses a screw barrel of a polyurethane injection molding machine, wherein a graphene nano-heating element is added inside the screw, and while the screw rotates, the polyurethane melt is heated and softened, and while the polyurethane melt has axial movement, lateral flow and gyratory motion, the stress on the screw is reduced, and these different forms of motion and work greatly promote the mixing effect of the polyurethane melt, so that the temperature inside the polyurethane melt reaches a high uniformity. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of a screw barrel of a polyurethane injection molding machine of the utility model;
[0015] List of Figure Symbols:
[0016] 1. Feed hopper; 2. Feed barrel; 3. Control panel; 4. Screw; 5. Feed sheet; 6. Graphene nano heating element; 7. Drive motor; 8. Nozzle; 9. Support seat; 10. Insulation layer. DETAILED DESCRIPTION
[0017] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.
[0018] It should be noted that the words "up", "down", "left", "right", "front" and "rear" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.
[0019] like Figure 1 As shown, a screw barrel of a polyurethane injection molding machine includes a feed hopper 1, a delivery barrel 2 and a control panel 3. A screw 4 is arranged inside the delivery barrel, and the screw 4 is driven to rotate by a driving motor 7. Graphene nano heating elements 6 are arranged inside the delivery barrel and the screw 4, and a support seat 9 is arranged under the delivery barrel 2.
[0020] Furthermore, spiral feeding pieces 5 are provided at equal intervals on the periphery of the screw rod 4 , and both the screw rod 4 and the feeding pieces 5 are made of stainless steel.
[0021] A nozzle 8 is provided at the front end of the feeding barrel 2. Preferably, the nozzle 8 is threadedly connected to the feeding barrel, and the nozzle 8 can be replaced with different calibers, which has better flexibility.
[0022] Preferably, a graphene nano heating element 6 is also provided inside the nozzle 8 to facilitate rapid discharge of the polyurethane material.
[0023] Preferably, the feed hopper 1 is welded and fixed above the rear end of the feeding barrel.
[0024] Preferably, the feeding barrel 2 is wrapped with a heat-insulating layer 10, which helps to maintain the temperature, prevent heat dissipation, and save energy.
[0025] In summary, the present application has a compact structure and a graphene nano-heating element is added inside the screw. While the screw rotates, the polyurethane melt is heated and softened. While the polyurethane melt has axial movement, lateral flow and swirling motion, the stress on the screw is reduced. These different forms of movement and work greatly promote the mixing effect of the polyurethane melt, making the temperature inside the polyurethane melt highly uniform.
[0026] It should be noted that the drawings only illustrate the technical ideas of the present invention, and the protection scope of the present invention cannot be limited by this shape. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.
Claims
1. A screw barrel for a polyurethane injection molding machine, Features: The invention comprises a feed hopper (1), a feed barrel (2) and a control panel (3), wherein a screw (4) is arranged in the feed barrel, a nozzle (8) is arranged at the front end of the feed barrel (2), graphene nano heating elements (6) are arranged inside the feed barrel and inside the screw (4), the screw (4) is driven to rotate by a drive motor (7), and a support seat (9) is arranged below the feed barrel (2); spiral feed sheets (5) are arranged at equal intervals on the periphery of the screw (4), and the screw (4) and the feed sheets (5) are both made of stainless steel; the nozzle (8) is threadedly connected to the feed barrel; and the nozzle (8) is also arranged inside the graphene nano heating element (6).
2. The screw barrel of a polyurethane injection molding machine according to claim 1, Features: The feed hopper (1) is welded and fixed above the rear end of the feeding barrel.
3. The screw barrel of a polyurethane injection molding machine according to claim 1, Features: The delivery cylinder (2) is wrapped with a heat-insulating layer (10).