Extrusion device for imitation reed
By designing the inner and outer layer structure of the willow-like extrusion device and using nitrogen foaming technology, the problem of traditional imitation rattan plastics being unable to achieve lightweight properties has been solved, realizing both lightweight and hardness effects similar to willow twigs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-26
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional rattan-like machines cannot produce rattan-like plastic that is as lightweight as natural willow and dried wood, and they cannot maintain the hardness of the surface and interior when they are highly foamed.
A willow-like extrusion device is used, in which molten plastic is injected into the first and second extrusion chambers through the first and second extrusion tubes respectively. Nitrogen gas is used to foam the inner layer of molten plastic to form a lightweight inner layer, while the outer layer does not foam and is cooled by a cold water tank to form an inner and outer layer structure that resembles willow.
It achieves the lightweight effect of imitation willow while avoiding quality defects such as surface grooves, ensuring that the surface hardness and internal density of the imitation willow are close to those of natural willow and dry wood.
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Figure CN115946327B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rattan imitating machines, and particularly relates to a willow strip imitating extruding device. BACKGROUND
[0002] In traditional willow weaving products, willow strips are taken from naturally grown willow trees, and the size, specification and quality of the willow strips are difficult to control due to seasonality and other uncertain factors in the growth process of the trees.
[0003] Therefore, in the prior art, various shapes and colors of plastic rattan are produced by using rattan imitating machines, however, the extruded plastic rattan of the traditional rattan imitating machines cannot be foamed to achieve the light weight of natural willow strips and dry wood, and cannot achieve the hardness of wood and willow strips on the surface and inside under the condition of high foaming. SUMMARY
[0004] Therefore, the present application provides a willow strip imitating extruding device to solve the problem that the extruded plastic rattan of the traditional rattan imitating machines cannot be foamed to achieve the light weight of natural willow strips and dry wood.
[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:
[0006] A willow-like extrusion device includes a frame, a cold water tank connected to the frame, an extrusion die connected to the frame, a first extrusion tube connected to the frame, and a second extrusion tube connected to the frame. The extrusion die includes an extruder and a die component. The die component is connected to a receiving cavity of the extruder. The outer wall of the extruder has an extrusion through-hole communicating with the receiving cavity, a first extrusion inlet communicating with the receiving cavity, and a second extrusion inlet communicating with the receiving cavity. The first extrusion inlet is located on the side of the second extrusion inlet away from the extrusion through-hole. The die component includes a connection to the... The extruder includes a connector, a first cylinder connected to the connector, and a first cylindrical sleeve connected to the connector. The first cylindrical sleeve is fitted onto the outside of the first cylinder, and the first cylindrical sleeve and the first cylinder form a first extrusion cavity. The outer wall of the first cylindrical sleeve and the cavity wall of the receiving cavity form a second extrusion cavity. The outer wall of the first cylindrical sleeve has a communicating hole connecting to the first extrusion cavity. The central axes of the first cylinder and the first cylindrical sleeve are collinear. A second cylinder is integrally connected to the end of the first cylinder away from the connector. The second cylinder is connected along the... The cross-sectional shape is the same at all points along the extension direction of the central axis of the first cylinder. A second cylindrical sleeve is integrally connected to the end of the first cylindrical sleeve away from the connecting member. The cross-sectional shape of the second cylindrical sleeve is the same at all points along the extension direction of the central axis of the first cylinder. Both the second cylindrical sleeve and the second cylinder are located at the extrusion through-hole. The wall of the extrusion through-hole forms a cylindrical surface that mates with the outer wall of the second cylindrical sleeve. The end of the second cylindrical sleeve away from the first cylindrical sleeve is flush with the outer wall of the extruder. The end of the second cylinder away from the first cylinder is flush with the outer wall of the extruder. The outer wall of the extruded part is flush; one end of the first extrusion tube extends into the first extrusion chamber through the first extrusion inlet and the connecting hole in sequence, and the other end is injected with molten plastic to allow the molten plastic to enter the first extrusion chamber. The side wall of the first extrusion tube is connected to a vent pipe for injecting nitrogen into the first extrusion tube; one end of the second extrusion tube extends into the second extrusion chamber through the second extrusion inlet, and the other end is injected with molten plastic to allow the molten plastic to enter the second extrusion chamber; the cold water tank is located at the extrusion through-hole, and the cold water tank contains water for cooling the molten plastic.
[0007] Preferably, the outer wall of the first cylinder is tapered from the connector to the extrusion hole, the outer wall of the first cylindrical sleeve is tapered from the connector to the extrusion hole, the connection between the first cylinder and the second cylinder is smooth, and the connection between the first cylindrical sleeve and the second cylindrical sleeve is smooth.
[0008] Preferably, the outer wall of the first cylinder is connected with a first thread rib spirally extending along the extending direction of the middle axis of the first thread rib, one end of the first extrusion pipe extends to between two adjacent turns of the first thread rib; the outer wall of the first cylindrical sleeve is connected with a second thread rib spirally extending along the extending direction of the middle axis of the second thread rib, one end of the second extrusion pipe extends to between two adjacent turns of the second thread rib.
[0009] Preferably, a spiral stirring rod extends into the first extrusion pipe, the middle axis of the spiral stirring rod coincides with the middle axis of the first extrusion pipe, and the spiral stirring rod is driven by a motor.
[0010] Preferably, the extrusion member is a third cylinder, the extrusion through hole is arranged on the end face of the third cylinder, and the first extrusion opening and the second extrusion opening are arranged on the side wall of the third cylinder.
[0011] Preferably, the connecting member is detachably connected to the extrusion member, and the connecting member and the extrusion member enclose the containing cavity.
[0012] The application has the following advantages:
[0013] The workers inject the molten plastic into the first extrusion pipe and the second extrusion pipe, the molten plastic enters the first extrusion cavity and the second extrusion cavity through the first extrusion pipe and the second extrusion pipe respectively, the molten plastic injected into the first extrusion cavity is extruded along the outer wall of the first cylinder to the extrusion through hole, and then is constrained by the second cylindrical sleeve and the second cylinder to form the inner layer of the wicker, at the same time, the molten plastic injected into the second extrusion cavity is extruded along the outer wall of the first cylindrical sleeve to the extrusion through hole, and then is constrained by the second cylindrical sleeve and the hole wall of the extrusion through hole to form the outer layer of the wicker, the outer layer adheres to the inner layer, and then is cooled by the water in the water tank to form the wicker, wherein the inner layer is formed by the molten plastic in the first extrusion pipe, the molten plastic is injected with nitrogen, so that the molten plastic at this position is foamed, and the wicker is formed with the density of natural wicker and dry wood, wherein the molten plastic forming the outer layer is not injected with nitrogen, the outer layer can wrap the inner layer, avoid the molten plastic foaming and expanding, and further avoid the surface of the wicker being expanded by the bubbles, and finally avoid the surface of the wicker being concave due to the quality defects. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more directly illustrate the prior art and the application, several exemplary drawings are given below. It should be understood that the specific shapes, structures shown in the drawings should not be regarded as limiting conditions in the implementation of the application; for example, based on the technical concepts disclosed in the application and the exemplary drawings, those skilled in the art can easily make routine adjustments or further optimizations on the increase / decrease / attribute division of certain units (components), specific shapes, positional relationships, connection modes, size ratio relationships, etc.
[0015] Figure 1 Fig. 1 is a schematic diagram of a part of a reed-like extrusion device according to an embodiment of the present application;
[0016] Figure 2 Fig. 2 is a schematic diagram of an extrusion member of a reed-like extrusion device according to an embodiment of the present application;
[0017] Figure 3 Fig. 3 is a schematic diagram of a reed-like extrusion of a reed-like extrusion device according to an embodiment of the present application;
[0018] Figure 4 Fig. 4 is a schematic diagram of a mold member of a reed-like extrusion device according to an embodiment of the present application.
[0019] Legend of reference signs:
[0020] 1, extrusion mold; 11, extrusion member; 111, accommodating cavity; 112, first extrusion cavity; 113, second extrusion cavity; 114, second extrusion inlet; 115, first extrusion inlet; 116, extrusion through-hole; 12, mold member; 121, first cylinder; 1211, second cylinder; 122, first cylindrical sleeve; 1221, second cylindrical sleeve; 1222, communication hole; 1223, second threaded rib; 123, connecting member; 2, first extrusion pipe; 21, air pipe; 22, spiral stirring rod; 3, second extrusion pipe; 4, cold water tank; 5, reed-like strip; 51, inner layer; 52, outer layer. DETAILED DESCRIPTION
[0021] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application.
[0022] In the description of the present application: the terms "inner" and "outer" refer to the inner and outer of the profile of the corresponding components; the terms "first" and "second" are intended to distinguish the objects referred to; the terms "include", "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units explicitly listed, but can also include other steps or units inherent to the process, method, product or device or added based on further optimization of the concept of the present application.
[0023] Reference Figures 1-4The application discloses a kind of reed 5 extrusion devices, including frame, cold water tank 4 connected to frame, extrusion die 1 connected to frame, first extrusion pipe 2 connected to frame, second extrusion pipe 3 connected to frame;Extrusion die 1 includes extrusion piece 11, die piece 12, die piece 12 is connected to the containing cavity 111 of extrusion piece 11, the outer wall of extrusion piece 11 is provided with extrusion through-hole 116 that communicates containing cavity 111, first extrusion inlet 115 that communicates containing cavity 111 and the second extrusion inlet 114 that communicates containing cavity 111, first extrusion inlet 115 is located at the side of second extrusion inlet 114 away from extrusion through-hole 116;Die piece 12 includes connecting piece 123 connected to extrusion piece 11, first cylinder 121 connected to connecting piece 123, first cylindrical sleeve 122 connected to connecting piece 123, first cylindrical sleeve 122 is sleeved on the outside of first cylindrical sleeve 122, and first cylindrical sleeve 122 and first cylinder 121 form first extrusion cavity 112, the outer wall of first cylindrical sleeve 122 and the cavity wall of containing cavity 111 form second extrusion cavity 113, the outer wall of first cylindrical sleeve 122 is provided with the communication hole 1222 that communicates first extrusion cavity 112, the central axis of first cylinder 121 and first cylindrical sleeve 122 is collinear, the end of first cylinder 121 away from connecting piece 123 is integrally connected with second cylinder 1211, the cross-sectional shape of second cylinder 1211 along the extension direction of the central axis of first cylinder 121 is the same everywhere, the end of first cylindrical sleeve 122 away from connecting piece 123 is integrally connected with second cylindrical sleeve 1221, the cross-sectional shape of second cylindrical sleeve 1221 along the extension direction of the central axis of first cylinder 121 is the same everywhere, second cylindrical sleeve 1221 and second cylinder 1211 are located at extrusion through-hole 116, the hole wall of extrusion through-hole 116 forms the cylindrical surface matched with the outer wall of second cylindrical sleeve 1221, the end of second cylindrical sleeve 1221 away from first cylindrical sleeve 122 is flush with the outer wall of extrusion piece 11, the end of second cylinder 1211 away from first cylinder 121 is flush with the outer wall of extrusion piece 11;One end of first extrusion pipe 2 is sequentially inserted into first extrusion cavity 112 through first extrusion inlet 115 and communication hole 1222, and the other end is injected into molten plastic, so that molten plastic enters first extrusion cavity 112, the side wall of first extrusion pipe 2 is connected with vent pipe 21 for injecting nitrogen into first extrusion pipe 2;One end of second extrusion pipe 3 is inserted into second extrusion cavity 113 through second extrusion inlet 114, and the other end is injected into molten plastic, so that molten plastic enters second extrusion cavity 113;Cold water tank 4 is located at extrusion through-hole 116, and cold water tank 4 contains water for cooling molten plastic.
[0024] The worker injects the molten plastic into the first extrusion pipe 2 and the second extrusion pipe 3, and the molten plastic enters the first extrusion cavity 112 and the second extrusion cavity 113 through the first extrusion pipe 2 and the second extrusion pipe 3 respectively. The molten plastic injected into the first extrusion cavity 112 is extruded along the outer wall of the first cylinder 121 to the extrusion through hole 116, and then is constrained by the second cylinder sleeve 1221 and the second cylinder 1211 to form the inner layer 51 of the wicker 5. At the same time, the molten plastic injected into the second extrusion cavity 113 is extruded along the outer wall of the first cylinder sleeve 122 to the extrusion through hole 116, and then is constrained by the second cylinder sleeve 1221 and the hole wall of the extrusion through hole 116 to form the outer layer 52 of the wicker 5, which is adhered to the inner layer 51 on the outside. Then, the wicker 5 is cooled by the water in the cold water tank 4, and the cooling forms the wicker 5. The inner layer 51 is formed by the molten plastic in the first extrusion pipe 2, and the molten plastic is filled with nitrogen to make the molten plastic in this place foamed, so that the wicker 5 has the same light weight as natural wicker and dry wood. The molten plastic forming the outer layer is not filled with nitrogen, and the outer layer can wrap the inner layer 51 to avoid foaming and opening the molten plastic, so as to prevent the surface of the wicker 5 from being opened by the bubbles, and finally cause the surface of the wicker 5 to have grooves and other quality defects.
[0025] With reference to Figure 1 and Figure 4 , the outer wall of the first cylinder 121 is tapered from the connecting piece 123 to the extrusion through hole 116, the outer wall of the first cylinder sleeve 122 is tapered from the connecting piece 123 to the extrusion through hole 116, the connection between the first cylinder 121 and the second cylinder 1211 is smoothly transitioned, and the connection between the first cylinder sleeve 122 and the second cylinder sleeve 1221 is smoothly transitioned. The tapering can guide the molten plastic to flow in the direction of the extrusion through hole 116, and the above-mentioned smooth transition makes the resistance small during the flow of the molten plastic.
[0026] The outer wall of the first cylinder 121 is connected with a first threaded rib extending spirally along the extension direction of the middle axis of the first cylinder 121, and one end of the first extrusion pipe 2 extends to between two adjacent turns of the first threaded rib. The outer wall of the first cylinder sleeve 122 is connected with a second threaded rib 1223 extending spirally along the extension direction of the middle axis of the first cylinder sleeve 122, and one end of the second extrusion pipe 3 extends to between two adjacent turns of the second threaded rib 1223. The first threaded rib and the second threaded rib 1223 can make the molten plastic rotate and flow in the spiral direction of the threaded rib to the extrusion through hole 116, so that the molten plastic can be uniformly extruded in the circumferential direction of the second cylinder sleeve 1221 and the circumferential direction of the second cylinder 1211, and the quality of the wicker 5 production is ensured.
[0027] With reference to Figure 1A spiral stirring rod 22 extends into the first extrusion tube 2. The central axis of the spiral stirring rod 22 coincides with the central axis of the first extrusion tube 2, and the spiral stirring rod 22 is driven by a motor. The spiral stirring rod 22 is used to stir the molten plastic, so that nitrogen gas is fully and evenly distributed in the molten plastic.
[0028] The extruder 11 is a third cylinder, with an extrusion through-hole 116 opened on the end face of the third cylinder, and the first extrusion inlet 115 and the second extrusion inlet 114 both opened on the side wall of the third cylinder.
[0029] The connector 123 is detachably connected to the extruder 11, and the connector 123 and the extruder 11 form a receiving cavity 111. The detachable connection of the connector 123 to the extruder 11 allows the extrusion die 1 to be repaired and replaced. The connector 123 can be connected to the extruder 11 via a threaded connection.
[0030] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.
[0031] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.
Claims
1. A willow-twig-inspired extrusion device, characterized in that, It includes a frame, a cold water tank connected to the frame, an extrusion die connected to the frame, a first extrusion tube connected to the frame, and a second extrusion tube connected to the frame; The extrusion die includes an extruder and a die component. The die component is connected to the receiving cavity of the extruder. The outer wall of the extruder has an extrusion through hole communicating with the receiving cavity, a first extrusion inlet communicating with the receiving cavity, and a second extrusion inlet communicating with the receiving cavity. The first extrusion inlet is located on the side of the second extrusion inlet away from the extrusion through hole. The mold component includes a connector connected to the extruder, a first cylinder connected to the connector, and a first cylindrical sleeve connected to the connector. The first cylindrical sleeve is sleeved on the outside of the first cylinder, and the first cylindrical sleeve and the first cylinder form a first extrusion cavity. The outer wall of the first cylindrical sleeve and the cavity wall of the receiving cavity form a second extrusion cavity. The outer wall of the first cylindrical sleeve has a communicating hole connecting to the first extrusion cavity. The central axes of the first cylinder and the first cylindrical sleeve are collinear. A second cylinder is integrally connected to the end of the first cylinder away from the connector. The cross-sectional shape is the same at all points along the extension direction of the central axis of the first cylinder. The end of the first cylindrical sleeve away from the connector is integrally connected to the second cylindrical sleeve. The cross-sectional shape of the second cylindrical sleeve is the same at all points along the extension direction of the central axis of the first cylinder. The second cylindrical sleeve and the second cylinder are both located at the extrusion through hole. The hole wall of the extrusion through hole forms a cylindrical surface that mates with the outer wall of the second cylindrical sleeve. The end of the second cylindrical sleeve away from the first cylindrical sleeve is flush with the outer wall of the extruder. The end of the second cylinder away from the first cylinder is also flush with the outer wall of the extruder. One end of the first extrusion tube extends into the first extrusion chamber through the first extrusion inlet and the connecting hole in sequence, and the other end is injected with molten plastic to allow the molten plastic to enter the first extrusion chamber. The side wall of the first extrusion tube is connected to a vent tube for injecting nitrogen into the first extrusion tube. One end of the second extrusion tube extends into the second extrusion chamber through the second extrusion inlet, and the other end is injected with molten plastic, allowing the molten plastic to enter the second extrusion chamber; The cold water tank is located at the extrusion through-hole, and the cold water tank contains water for cooling the molten plastic.
2. The willow-like extrusion device according to claim 1, characterized in that, The outer wall of the first cylinder is tapered from the connector to the extrusion hole, the outer wall of the first cylindrical sleeve is tapered from the connector to the extrusion hole, the connection between the first cylinder and the second cylinder is smooth, and the connection between the first cylindrical sleeve and the second cylindrical sleeve is smooth.
3. The willow-like extrusion device according to claim 2, characterized in that, The outer wall of the first cylinder is connected to a first threaded rib that extends spirally along its own central axis, and one end of the first extrusion tube extends to the space between two adjacent turns of the first threaded rib. The outer wall of the first cylindrical sleeve is connected to a second threaded rib that extends spirally along its own central axis, and one end of the second extrusion tube extends to the space between two adjacent turns of the second threaded rib.
4. The willow-like extrusion device according to claim 1, characterized in that, A spiral stirring rod extends into the first extrusion tube, the central axis of which coincides with the central axis of the first extrusion tube, and the spiral stirring rod is driven by a motor.
5. The willow-like extrusion device according to claim 1, characterized in that, The extruder is a third cylinder, the extrusion through-hole is opened on the end face of the third cylinder, and the first extrusion inlet and the second extrusion inlet are both opened on the side wall of the third cylinder.
6. The willow-like extrusion device according to claim 1, characterized in that, The connector is detachably connected to the extruder, and the connector and the extruder together form the receiving cavity.
Citation Information
Patent Citations
Imitation wicker extrusion device
CN219360252U