Multi-cavity tube extrusion die

Abstract

The utility model relates to the technical field of forming dies, and particularly discloses a multi-cavity tube extrusion die which is characterized in that a circumferential rod and a pointed cone flow guide body are arranged on the surface of a base, a limiting ring is arranged on the surface of the circumferential rod, a limiting assembly is arranged on the surface of the limiting ring, a guide column is fixed on the limiting ring, and a second spring and a connecting ring are arranged on the guide column; a core rod base is arranged at the lower end of the shaping core rod, a vertical plate is arranged at the lower end of the core rod base, and a first concave hole and a second concave hole are formed in the lower end of the core rod base; the multi-cavity tube extrusion die has the advantages that the die structure is designed, the end face gradient type core die base is adopted, the material flow compression effect is provided, the density and strength of materials are guaranteed, the conical design is adopted in the center part, material flow accumulation and raw material decomposition are prevented, and meanwhile, the extrusion efficiency is improved. The shaping core rod adopts a detachable modular installation mode, and is suitable for extrusion or pushing of multi-cavity pipes with different sizes and different cavity shapes.

Description

Technical Field

[0001] The utility model relates to the technical field of molding dies, in particular to a multi-cavity tube extrusion die. Background Art

[0002] Molding molds, also known as molds, are molds made in proportion to the shape and structure of the actual object. They are tools that use pressing or pouring methods to make materials into a certain shape. Plastic molding processing is a general term for various processes that convert synthetic resins or plastics into plastic products. It is a larger production department in the plastics industry.

[0003] At present, the structural form of multi-cavity tube extrusion dies is mostly a conical compression core mold base, and a shaping core rod is installed around or in the center of the conical base. However, when the molten material flows through the shaping core rod, the flow velocity and pressure difference around the core rod is too large, which can easily cause poor welding and lead to poor mechanical properties of the cavity wall. At the same time, the existence of the cone causes the raw material to remain in the core mold cone during the extrusion of high-viscosity materials, which will cause aging and decomposition of the raw material over a long period of time, affecting the quality of the extruded product. Therefore, the utility model proposes a multi-cavity tube extrusion die to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-cavity tube extrusion die to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a multi-lumen tube extrusion die, the multi-lumen tube extrusion die comprising: a base, a circumferential rod and a pointed cone guide body are arranged on the surface of the base, a limit ring is arranged on the surface of the circumferential rod, a limit assembly is arranged on the surface of the limit ring, a guide column is fixed on the limit ring, and a second spring and a connecting ring are arranged on the guide column;

[0006] A shaping mandrel is provided at the lower end of the shaping mandrel, a mandrel base is provided at the lower end of the mandrel base, a vertical plate is provided at the lower end of the mandrel base, and a first concave hole and a second concave hole are opened at the lower end of the mandrel base.

[0007] Preferably, the surface of the base adopts a gradual change in the end face, the pointed cone guide body is located at the center of the base, and three groups of circumferential rods are provided, and the three groups of circumferential rods are evenly distributed around the pointed cone guide body.

[0008] Preferably, the limiting ring is fixedly connected to the circumferential rod, a groove is provided on the surface of the limiting ring, a second through hole is provided on the side of the limiting ring, three groups of grooves are provided, and the three groups of grooves are evenly distributed on the surface of the limiting ring, and three groups of second through holes are provided, and the three groups of second through holes are evenly distributed on the side of the limiting ring.

[0009] Preferably, a first through hole is opened on the surface of the vertical plate, and three groups of vertical plates are provided, and the three groups of vertical plates are evenly distributed on the lower surface of the core rod base, the second spring is sleeved on the guide column, the connecting ring is slidably connected to the guide column, one end of the second spring is fixedly connected to the limiting ring, and the other end of the second spring is fixedly connected to the connecting ring, and three groups of guide columns are provided, and the three groups of guide columns are evenly distributed on the surface of the limiting ring, the guide column and the second concave hole are slidably adapted, and the connecting ring and the first concave hole are slidably adapted.

[0010] Preferably, the limiting assembly comprises a column, a first spring and a fixing member, the column can be inserted into the first through hole and the second through hole, and the fixing member is fixed to the end surface of the column.

[0011] Preferably, the limiting assembly comprises a column, a first spring and a fixing member, the column can be inserted into the first through hole and the second through hole, and the fixing member is fixed to the end surface of the column.

[0012] Preferably, the inner wall of the groove and the outer wall of the vertical plate are slidably connected.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model proposes a multi-cavity tube extrusion die. By designing the die structure, an end face gradient core die base is adopted to provide a material flow compression effect to ensure the material density and strength, improve the quality of the extruded product, and a conical design is adopted in the center part to prevent the accumulation of material flow and the decomposition of raw materials. At the same time, a shaping core rod adopts a detachable modular installation method, which is suitable for extrusion or pushing of multi-cavity tubes of different sizes and different cavity shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a detailed diagram of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the mandrel base of the utility model;

[0018] Figure 4 This is a cross-sectional view of the core rod base structure of the utility model;

[0019] Figure 5 for Figure 4 A magnified view of the structure at B in the middle;

[0020] Figure 6 for Figure 4 A magnified view of the structure at C in the middle;

[0021] Figure 7 for Figure 2 A magnified view of the structure in the middle.

[0022] In the figure: 1. base; 2. circumferential rod; 3. pointed cone guide body; 4. shaping core rod; 5. limiting assembly; 6. core rod base; 7. vertical plate; 8. first through hole; 9. first concave hole; 10. second concave hole; 11. handle; 12. rubber pad; 13. second through hole; 14. limiting ring; 15. fixing device; 16. first spring; 17. vertical column; 18. guide column; 19. connecting ring; 20. second spring; 21. groove. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of 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.

[0024] Embodiment 1

[0025] See also Figure 1-Figure 7 The utility model provides a technical solution: a multi-lumen tube extrusion die, the multi-lumen tube extrusion die comprising: a base 1, a circumferential rod 2 and a pointed cone guide body 3 are arranged on the surface of the base 1, a limiting ring 14 is arranged on the surface of the circumferential rod 2, a limiting assembly 5 is arranged on the surface of the limiting ring 14, a guide column 18 is fixed on the limiting ring 14, and a second spring 20 and a connecting ring 19 are arranged on the guide column 18;

[0026] A shaping mandrel 4 is provided at the lower end of the shaping mandrel 4 with a mandrel base 6, a vertical plate 7 is provided at the lower end of the mandrel base 6, a first concave hole 9 and a second concave hole 10 are provided at the lower end of the mandrel base 6, the surface of the base 1 adopts an end face gradient type, the pointed cone guide body 3 is located at the center of the base 1, and three groups of circumferential rods 2 are provided, and the three groups of circumferential rods 2 are evenly distributed around the pointed cone guide body 3;

[0027] When in use, the shaping core rod 4 can be of a circular cross-section or an irregular cross-section. By designing the mold structure and adopting an end face gradient core mold base 1, a material flow compression effect is provided to ensure material density and strength, thereby improving the quality of the extruded product. A conical design is adopted in the center part to prevent material flow accumulation and raw material decomposition. At the same time, the shaping core rod 4 adopts a detachable modular installation method, which is suitable for extrusion or pushing of multi-cavity tubes of different sizes and different cavity shapes.

[0028] Embodiment 2

[0029] On the basis of the first embodiment, it is convenient to install the mandrel, and a limiting assembly 5 is provided. The limiting assembly 5 includes a column 17, a first spring 16 and a fixing member 15. The column 17 can be inserted into the first through hole 8 and the second through hole 13. The fixing member 15 is fixed to the end face of the column 17. The first spring 16 is sleeved on the column 17. One end of the first spring 16 is fixedly connected to the fixing member 15, and the other end of the first spring 16 is fixedly connected to the limiting ring 14. A handle 11 is fixed to the surface of the fixing member 15, and a rubber pad 12 is fixed to the inner surface of the handle 11. The inner wall of the groove 21 and the outer wall of the vertical plate 7 are slidably connected. The surface of the vertical plate 7 is provided with a first through hole 8. The second spring 20 is sleeved on the guide column 18, and the connecting ring 19 is slidably connected to the guide column 18. One end of the second spring 20 is fixedly connected to the limiting ring 14, and the other end of the second spring 20 is fixedly connected to the connecting ring 19. The guide column 18 and the second concave hole 10 are slidably adapted, and the connecting ring 19 and the first concave hole 9 are slidably adapted.

[0030] When in use, the handle 11 is manually moved to disengage the column 17 from the groove 21, and then the vertical plate 7 is correspondingly inserted into the groove 21, and the guide column 18 is inserted into the second recessed hole 10, thereby providing a guiding effect, and the connecting ring 19 is correspondingly inserted into the first recessed hole 9, so that the second spring 20 is deformed. When the vertical plate 7 is fully inserted into the groove 21, the first through hole 8 and the second through hole 13 correspond. At this time, the handle 11 is released, and the column 17 automatically moves to the groove 21 under the rebound action of the first spring 16, and then is inserted into the first through hole 8 and the second through hole 13 to limit the core rod base 6. At this time, due to the rebound effect of the second spring 20, the core rod base 6 has an upward force, so that the column 17 is close to the inner wall of the first through hole 8, thereby improving the stability of the installation.

[0031] In actual use, by designing the mold structure, a gradual-change core mold base 1 is adopted at the end face to provide material flow compression to ensure material density and strength, improve the quality of the extruded product, and adopt a conical design in the center to prevent material flow accumulation and decomposition of raw materials. At the same time, the shaping core rod 4 adopts a detachable modular installation method, which is suitable for multi-cavity tube extrusion or pushing of different sizes and different cavity shapes. This avoids the problem that the current multi-cavity tube extrusion mold structure is mostly a compression core mold base 1 of a cone, and the shaping core rod 4 is installed around or in the center of the cone base 1. However, when the molten material flows through the surrounding shaping core rod 4, the flow velocity and pressure of the material flow around the core rod are too different, which can easily cause poor welding and poor mechanical properties of the cavity wall. At the same time, the existence of the cone causes the raw materials to remain at the core mold cone during the extrusion of high-viscosity materials, which will cause aging and decomposition of the raw materials over a long period of time, affecting the quality of the extruded products.

[0032] 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 multi-lumen tube extrusion die, characterized in that: The multi-lumen tube extrusion die comprises: a base (1), a circumferential rod (2) and a pointed cone guide body (3) are arranged on the surface of the base (1), a limit ring (14) is arranged on the surface of the circumferential rod (2), a limit assembly (5) is arranged on the surface of the limit ring (14), a guide column (18) is fixed on the limit ring (14), and a second spring (20) and a connecting ring (19) are arranged on the guide column (18); A shaping mandrel (4) is provided at the lower end of the shaping mandrel (4) with a mandrel base (6), a vertical plate (7) is provided at the lower end of the mandrel base (6), and a first concave hole (9) and a second concave hole (10) are provided at the lower end of the mandrel base (6).

2. A multi-lumen tube extrusion die according to claim 1, characterized in that: The surface of the base (1) adopts an end face gradient type, the pointed cone guide body (3) is located at the center of the base (1), and three groups of circumferential rods (2) are provided. The three groups of circumferential rods (2) are evenly distributed around the pointed cone guide body (3).

3. A multi-lumen tube extrusion die according to claim 1, characterized in that: The limiting ring (14) is fixedly connected to the circumferential rod (2), a groove (21) is provided on the surface of the limiting ring (14), a second through hole (13) is provided on the side of the limiting ring (14), three groups of grooves (21) are provided, and the three groups of grooves (21) are evenly distributed on the surface of the limiting ring (14), and three groups of second through holes (13) are provided, and the three groups of second through holes (13) are evenly distributed on the side of the limiting ring (14).

4. The multi-lumen tube extrusion die according to claim 1, characterized in that: A first through hole (8) is provided on the surface of the vertical plate (7), and the vertical plate (7) is provided with three groups. The three groups of vertical plates (7) are evenly distributed on the lower surface of the core rod base (6). The second spring (20) is sleeved on the guide column (18), and the connecting ring (19) is slidably connected to the guide column (18). One end of the second spring (20) is fixedly connected to the limiting ring (14), and the other end of the second spring (20) is fixedly connected to the connecting ring (19). The guide column (18) is provided with three groups. The three groups of guide columns (18) are evenly distributed on the surface of the limiting ring (14). The guide column (18) and the second concave hole (10) are slidably adapted, and the connecting ring (19) and the first concave hole (9) are slidably adapted.

5. The multi-lumen tube extrusion die according to claim 1, characterized in that: The limiting assembly (5) comprises a column (17), a first spring (16) and a fixing member (15); the column (17) can be inserted into the first through hole (8) and the second through hole (13); and the fixing member (15) is fixed to the end surface of the column (17).

6. A multi-lumen tube extrusion die according to claim 5, characterized in that: The first spring (16) is sleeved on the column (17), one end of the first spring (16) is fixedly connected to the fixing member (15), the other end of the first spring (16) is fixedly connected to the limiting ring (14), a handle (11) is fixed on the surface of the fixing member (15), and a rubber pad (12) is fixed on the inner surface of the handle (11).

7. The multi-lumen tube extrusion die according to claim 3, characterized in that: The inner wall of the groove (21) and the outer wall of the vertical plate (7) are slidably connected.

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