Multi-layer co-extrusion die

Abstract

The utility model relates to the technical field of co-extrusion dies, and discloses a multi-layer co-extrusion die which comprises a die body and a feeding pipe, a pair of mounting bases are fixed to the top of the die body, and a plurality of L-shaped clamping grooves distributed in the circumferential direction at equal intervals are formed in the inner walls of the two mounting bases; embedded pipes are fixed to the bottom ends of the two feeding pipes, and embedded grooves matched with the embedded pipes are formed in the mounting base; the device further comprises a limiting mechanism. By arranging the L-shaped clamping block and the L-shaped clamping groove, the embedded pipe on the feeding pipe is embedded into the mounting base on the die main body, then the feeding pipe is rotated clockwise to enable the L-shaped clamping block to be clamped into the L-shaped clamping groove, and then the feeding pipe is limited and fixed by means of the limiting rod, so that a bolt or a nut does not need to be screwed by using a wrench when the feeding pipe is disassembled and assembled; operation steps are simplified, manpower is saved, the feeding pipe can be conveniently and rapidly mounted and dismounted, follow-up cleaning or maintenance is facilitated, and practicability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of co-extrusion dies, and in particular to a multi-layer co-extrusion die. Background Art

[0002] Multilayer composite pipes are products designed for transmitting hot fluids. Traditional multilayer composite pipes are generally extruded through multilayer co-extrusion dies. After the molten material is extruded from the extruder, it is divided into three strands and enters the inner, middle and outer layers of the spiral respectively.

[0003] There are two feed pipes on the multi-layer co-extrusion mold. After each material extrusion work is completed, the staff is required to clean the inner wall of the feed pipe. Before cleaning, the staff needs to use a wrench to separate the feed pipe and the mold body. Tightening multiple bolts is not only time-consuming, but also laborious and difficult to operate, and the workload is large. Utility Model Content

[0004] In order to solve the problem, the present application provides a multi-layer co-extrusion die.

[0005] A multi-layer co-extrusion die provided in this application adopts the following technical solution:

[0006] A multi-layer co-extrusion die comprises a die main body and a feed pipe, wherein a pair of mounting bases are fixed on the top of the die main body, and the inner walls of the two mounting bases are provided with a plurality of L-shaped clamping grooves which are equally spaced and distributed along the circumferential direction; an embedding tube is fixed to the bottom end of the two feed pipes, and an embedding groove which is compatible with the embedding tube is provided on the mounting base; and a limiting mechanism is also included, wherein the limiting mechanism is installed on the die main body through a support plate in the limiting mechanism, and the limiting mechanism is used to limit and fix the feed pipe on the die main body.

[0007] Optionally, a plurality of L-shaped clamping blocks distributed along the circumferential direction are fixed on the outer surface of the embedded tube, the L-shaped clamping blocks are adapted to the L-shaped clamping grooves, and both the L-shaped clamping blocks and the L-shaped clamping grooves are arc-shaped structures.

[0008] Optionally, a positioning ring is fixed to the bottom end of the feed pipe, and a plurality of fixing holes are provided on the positioning ring.

[0009] Optionally, the limiting mechanism includes a limiting rod slidably sleeved on the support plate, a fixing plate is sleeved and fixed on the limiting rod, one end of the limiting rod extends to the outside of the support plate and is fixed with a pull ring, and the limiting rod is adapted to the fixing hole.

[0010] Optionally, a spring is sleeved on the limiting rod, and the spring is respectively connected to the fixing plate and the supporting plate, and the limiting rod can be moved by the elastic force of the spring.

[0011] Optionally, the bottom surface of the positioning ring may fit with the top surface of the mounting base.

[0012] Optionally, a chamfer is provided at the notch of the fixing hole.

[0013] Optionally, a plurality of through holes distributed along the circumferential direction are opened on the support plate, a limiting block is fixed on the limiting rod, the limiting block can be connected to the support plate, and the through holes are larger than the limiting block.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] By providing an L-shaped clamping block and an L-shaped clamping groove, the embedded tube on the feed pipe is embedded in the mounting base on the mold body, and then the feed pipe is rotated clockwise to make the L-shaped clamping block clamp into the L-shaped clamping groove, and then the feed pipe is limited and fixed with the help of a limit rod, so that when disassembling and installing the feed pipe, there is no need to use a wrench to tighten the bolts or nuts, which simplifies the operation steps, saves manpower, and facilitates the rapid installation and disassembly of the feed pipe, which is convenient for subsequent cleaning or maintenance, and improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of explosion and partial magnification of the three-dimensional structure;

[0018] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure with part of the structure hidden and part of it enlarged.

[0019] Explanation of the reference numerals: 1. mold body; 2. mounting base; 3. feed pipe; 4. support plate; 5. limit rod; 6. pull ring; 7. positioning ring; 8. fixing hole; 9. embedded tube; 10. L-shaped clamping block; 11. embedded groove; 12. L-shaped clamping groove; 13. fixing plate; 14. spring; 15. limit block; 16. through hole. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0021] The present application embodiment discloses a multi-layer co-extrusion die. Figure 1-Figure 3A multi-layer co-extrusion die comprises a die main body 1 and a feed pipe 3. A pair of mounting bases 2 are fixed on the top of the die main body 1. The inner walls of the two mounting bases 2 are provided with a plurality of L-shaped clamping grooves 12 which are equally spaced and distributed along the circumferential direction; an embedding tube 9 is fixed to the bottom ends of the two feed pipes 3. An embedding groove 11 which is adapted to the embedding tube 9 is provided on the mounting base 2; and a limiting mechanism is also included. The limiting mechanism is installed on the die main body 1 through a support plate 4 in the limiting mechanism. The limiting mechanism is used to limit the feed pipe 3 The mold body 1 is fixed thereon, and a plurality of L-shaped blocks 10 distributed along the circumferential direction are fixed on the outer surface of the embedding tube 9. The L-shaped blocks 10 are matched with the L-shaped embedding grooves 12, and both the L-shaped blocks 10 and the L-shaped embedding grooves 12 are arc-shaped structures. One end of the L-shaped blocks 10 and the L-shaped embedding grooves 12 is wider, and the other end is narrower, and the narrow end of the L-shaped blocks 10 is embedded in the narrow end of the L-shaped embedding grooves 12, and the wide end of the L-shaped embedding grooves 12 extends to the top of the mounting base 2, so that the L-shaped blocks 10 can be embedded or removed.

[0022] A positioning ring 7 is fixed to the bottom end of the feed pipe 3, and a plurality of fixing holes 8 are opened on the positioning ring 7. The limiting mechanism includes a limiting rod 5 slidably sleeved on the support plate 4, and a fixing sheet 13 is sleeved and fixed on the limiting rod 5. One end of the limiting rod 5 extends to the outside of the support plate 4 and is fixed with a pull ring 6. The limiting rod 5 is adapted to the fixing hole 8. A spring 14 is sleeved on the limiting rod 5, and the spring 14 is respectively connected to the fixing sheet 13 and the support plate 4. The limiting rod 5 can be moved by the elastic force of the spring 14. When disassembling, the limiting rod 5 is pulled out and rotated counterclockwise. Rotate the feed tube 3 until it cannot rotate anymore. At this time, the L-shaped clamping block 10 is vertically aligned with the wide end of the L-shaped clamping groove 12. The feed tube 3 can be removed by lifting it up. The operation is simple. When installing, you only need to pull out the limiting rod 5 to insert the embedded tube 9 into the embedded groove 11, and at the same time, align the L-shaped clamping block 10 with the L-shaped clamping groove 12 vertically. After the L-shaped clamping block 10 is embedded in the L-shaped clamping groove 12, rotate the feed tube 3 clockwise until it cannot rotate anymore. At this time, insert the limiting rod 5 into the fixing hole 8 to fix it, which is easy to use.

[0023] In this embodiment, if Figure 1 and Figure 2 As shown, the bottom surface of the positioning ring 7 can fit with the top surface of the mounting base 2, and the positioning ring 7 also has the functions of sealing and limiting, so that the installation of the feed pipe 3 is more stable.

[0024] In this embodiment, if Figure 1 and Figure 2 As shown, the notch of the fixing hole 8 is chamfered, and this arrangement can reduce the friction and the contact area at the notch, thereby facilitating the smooth insertion of the limiting rod 5 and facilitating installation.

[0025] In this embodiment, if Figure 3As shown, a plurality of through holes 16 distributed in the circumferential direction are provided on the support plate 4, a limiting block 15 is fixed on the limiting rod 5, the limiting block 15 can be connected to the support plate 4, the through hole 16 is larger than the limiting block 15, when disassembling or installing, the pull ring 6 is pulled and rotated to make the limiting block 15 correspond to the through hole 16, so that the limiting rod 5 can slide horizontally on the support plate 4, and when the limiting block 15 deviates from the through hole 16 and fits with the support plate 4, a limiting effect will be generated.

[0026] The implementation principle of a multi-layer co-extrusion die in the embodiment of the present application is as follows: when disassembling, pull out the limiting rod 5, rotate the feed tube 3 counterclockwise until it cannot rotate, at this time, the L-shaped clamping block 10 is vertically aligned with the wide end of the L-shaped clamping groove 12, and the feed tube 3 can be removed by lifting it up, which is simple to operate; when installing, just pull out the limiting rod 5, insert the embedded tube 9 into the embedded groove 11, and at the same time, align the L-shaped clamping block 10 with the L-shaped clamping groove 12 vertically, when the L-shaped clamping block 10 is embedded in the L-shaped clamping groove 12, rotate the feed tube 3 clockwise until it cannot rotate further, at this time, insert the limiting rod 5 into the fixing hole 8 to fix it, which is convenient for use;

[0027] By setting the L-shaped clamping block 10 and the L-shaped clamping groove 11, the embedded tube 9 on the feed tube 3 is embedded in the mounting base 2 on the mold body 1, and then the feed tube 3 is rotated clockwise to make the L-shaped clamping block 10 clamp into the L-shaped clamping groove 11, and then the feed tube 3 is limited and fixed with the help of the limiting rod 5, so that when disassembling and installing the feed tube 3, there is no need to use a wrench to tighten the bolts or nuts, which simplifies the operation steps, saves manpower, and facilitates the rapid installation and disassembly of the feed tube, which is convenient for subsequent cleaning or maintenance, and improves practicality.

[0028] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0029] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-layer co-extrusion die, comprising a die body (1) and a feed pipe (3), characterized in that: A pair of mounting bases (2) are fixed on the top of the mold body (1), and the inner walls of the two mounting bases (2) are each provided with a plurality of L-shaped clamping grooves (12) which are evenly spaced and distributed along the circumferential direction; An embedding tube (9) is fixed to the bottom end of each of the two feed tubes (3), and an embedding groove (11) adapted to the embedding tube (9) is provided on the mounting base (2); It also comprises a limiting mechanism, wherein the limiting mechanism is mounted on the mold body (1) via a support plate (4) in the limiting mechanism, and the limiting mechanism is used to limit and fix the feed pipe (3) on the mold body (1).

2. A multi-layer co-extrusion die according to claim 1, characterized in that: A plurality of L-shaped clamping blocks (10) distributed along the circumferential direction are fixed on the outer surface of the embedded tube (9); the L-shaped clamping blocks (10) are matched with the L-shaped clamping grooves (12); and both the L-shaped clamping blocks (10) and the L-shaped clamping grooves (12) are arc-shaped structures.

3. A multi-layer co-extrusion die according to claim 1, characterized in that: A positioning ring (7) is fixed at the bottom end of the feed pipe (3), and a plurality of fixing holes (8) are provided on the positioning ring (7).

4. A multi-layer co-extrusion die according to claim 3, characterized in that: The limiting mechanism comprises a limiting rod (5) slidably sleeved on the support plate (4), a fixing plate (13) being sleeved and fixed on the limiting rod (5), one end of the limiting rod (5) extending to the outside of the support plate (4) and being fixed with a pull ring (6), and the limiting rod (5) is adapted to the fixing hole (8).

5. A multi-layer co-extrusion die according to claim 4, characterized in that: The limiting rod (5) is sleeved with a spring (14), and the spring (14) is respectively connected to the fixing plate (13) and the supporting plate (4), and the limiting rod (5) can be moved by the elastic force of the spring (14).

6. A multi-layer co-extrusion die according to claim 3, characterized in that: The bottom surface of the positioning ring (7) can fit with the top surface of the mounting base (2).

7. A multi-layer co-extrusion die according to claim 3, characterized in that: The notch of the fixing hole (8) is provided with a chamfer.

8. A multi-layer co-extrusion die according to claim 4, characterized in that: A plurality of through holes (16) distributed along the circumferential direction are provided on the support plate (4); a limiting block (15) is fixed on the limiting rod (5); the limiting block (15) can be connected to the support plate (4); and the through holes (16) are larger than the limiting block (15).

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