Cooling forming mechanism for multi-layer bar extrusion die

Abstract

The utility model provides a cooling forming mechanism for a multi-layer bar extrusion die, which belongs to a cooling forming part in the multi-layer bar extrusion process and comprises at least two layers of cooling modules which are longitudinally arranged, and each cooling module comprises at least one cooling pipe. The cooling pipe comprises an outer pipe, an inner pipe arranged in the outer pipe and a spiral cooling channel arranged between the outer pipe and the inner pipe; the spiral cooling channels are communicated with a cooling liquid pipeline system, the cooling liquid pipeline system comprises a cooling liquid inlet main pipeline and a cooling liquid outlet main pipeline, and the cooling liquid inlet main pipeline is communicated with cooling liquid inlet branch pipelines communicated with the spiral cooling channels. And the cooling liquid outlet main pipeline is communicated with cooling liquid outlet branch pipelines communicated with the spiral cooling channels. Compared with the prior art, the cooling forming mechanism has the advantages that the cooling pipes in all the layers are in butt joint with the extrusion die, after bars extruded out of the extrusion die enter the cooling pipes, cooling liquid filled in the spiral cooling channels is used for rapid cooling forming, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of cooling a rod extrusion die, in particular to a cooling forming mechanism for a multi-layer rod extrusion die. Background Art

[0002] When forming polymer material rods, they generally go through the steps of melt plasticization, extrusion, cooling molding and cutting. In the existing cooling molding step, the molten extruded material passes through the mold temperature zone and enters the cooling and shaping area. In the cooling and shaping area, the rod is quickly cooled by the cooling system to shape it and maintain the desired shape and size. The cooling process usually includes spray cooling or immersion cooling to ensure that the surface and internal temperature of the entire rod is evenly reduced. However, the spray cooling or immersion cooling method has a slow cooling speed and occupies a large area. The coolant cannot be recycled, which wastes resources and has high production costs. Utility Model Content

[0003] In view of the above problems, the utility model provides a cooling molding mechanism for a multi-layer rod extrusion die, which can place the rods extruded from the extrusion die into a cooling tube, and use the coolant filled in the cooling tube to quickly cool and mold them. The cooling speed is fast, the occupied area is small, and the production cost is reduced.

[0004] The technical solution adopted by the utility model is:

[0005] A cooling forming mechanism for a multi-layer rod extrusion die comprises at least two layers of cooling modules arranged longitudinally, each layer of cooling modules comprises at least one cooling pipe, the cooling pipe comprises an outer pipe, an inner pipe inserted into the outer pipe, and a spiral cooling channel arranged between the outer pipe and the inner pipe; each spiral cooling channel is connected to a coolant pipeline system, the coolant pipeline system comprises a coolant inlet main pipeline and a coolant outlet main pipeline, the coolant inlet main pipeline is connected to a coolant inlet branch pipeline connected to each spiral cooling channel, and the coolant outlet main pipeline is connected to a coolant outlet branch pipeline connected to each spiral cooling channel.

[0006] Preferably, the spiral cooling channel is divided into a fast cooling section and a slow cooling section, and the fast cooling section is connected with the slow cooling section through a connecting pipe.

[0007] More preferably, the length of the fast cooling section is shorter than that of the slow cooling section, the coolant inlet branch pipeline is connected to the fast cooling section, and the slow cooling section is connected to the coolant outlet branch pipeline.

[0008] More preferably, the spiral cooling channel is arranged on the outer wall of the inner tube.

[0009] Preferably, the coolant inlet main channel and the coolant outlet main channel are arranged in the seat body.

[0010] More preferably, the two layers of cooling modules are arranged up and down, with an upper coolant pipeline system corresponding to the upper layer of cooling tubes and a lower coolant pipeline system corresponding to the lower layer of cooling tubes; the coolant inlet branch pipeline and the coolant outlet branch pipeline in the upper coolant pipeline system are connected to the corresponding spiral cooling channel in the upper layer of cooling tubes, and the coolant inlet branch pipeline and the coolant outlet branch pipeline in the lower coolant pipeline system are connected to the corresponding spiral cooling channel in the lower layer of cooling tubes.

[0011] More preferably, the coolant inlet main line and the coolant outlet main line in the upper coolant pipeline system are arranged in the upper seat body; the coolant inlet main line and the coolant outlet main line in the lower coolant pipeline system are arranged in the lower seat body.

[0012] Preferably, the inlet end of the cooling pipe is provided with a sealing step that docks with the extrusion port of the forming die.

[0013] Preferably, each layer of cooling modules is mounted on a mounting plate, a docking port for docking with the outlet end of each cooling pipe is provided on the mounting plate, and the mounting plate is mounted on the forming mold via a support rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a cooling molding mechanism for a multi-layer rod extrusion die, which adopts cooling pipes in each layer to connect with the extrusion die. After the rod extruded from the extrusion die enters the cooling pipe, it is quickly cooled and molded by using the coolant filled in the spiral cooling channel in the cooling pipe. The cooling speed is fast, the occupied area is small, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , which is a schematic diagram of a cooling molding mechanism for a multi-layer rod extrusion die provided by the utility model;

[0016] Figure 2 , which is an exploded view of a cooling molding mechanism for a multi-layer rod extrusion die provided by the utility model;

[0017] Figure 3 , which is an exploded view of a cooling tube in a cooling forming mechanism for a multi-layer rod extrusion die provided by the utility model;

[0018] Figure 4 , which is a top view of a cooling molding mechanism for a multi-layer rod extrusion die provided by the utility model;

[0019] Figure 5 , which is a cross-sectional view of a cooling molding mechanism at AA for a multi-layer rod extrusion die provided by the utility model;

[0020] Figure 6, which is a cross-sectional view of a cooling molding mechanism at BB for a multi-layer rod extrusion die provided by the utility model. DETAILED DESCRIPTION

[0021] The preferred implementation modes provided by the utility model are described in detail according to the accompanying drawings.

[0022] Figures 1 to 6 , which is a preferred embodiment of a cooling molding mechanism for a multi-layer rod extrusion die provided by the utility model. Figures 1 to 6 As shown, the cooling molding mechanism for the multi-layer rod extrusion die comprises at least two layers of cooling modules 10 arranged in a longitudinal direction, each layer of cooling modules 10 comprises at least one cooling pipe 11, the cooling pipe 11 comprises an outer pipe 111, an inner pipe 112 placed in the outer pipe, and a spiral cooling channel 113 arranged between the outer pipe and the inner pipe; each spiral cooling channel 113 is connected to a cooling liquid pipeline system 20, and the cooling liquid pipeline system 20 comprises a cooling liquid inlet main pipeline 21 and a cooling liquid outlet main pipeline 22, the cooling liquid inlet main pipeline 21 is connected to a cooling liquid inlet branch pipeline 211 connected to each spiral cooling channel, and the cooling liquid outlet main pipeline 22 is connected to a cooling liquid outlet branch pipeline 212 connected to each spiral cooling channel. There is a coolant outlet branch pipeline 221 connected to each spiral cooling channel, so that the cooling tube 11 in each layer of the cooling module 10 is connected to the extrusion port of the extrusion die 100, and the coolant entering the coolant inlet main pipeline 21 is diverted to each coolant inlet branch pipeline 211, and then enters the spiral cooling channel 113 of the cooling tube 11. After the rod extruded from the extrusion die 100 enters the cooling tube 11, it is quickly cooled and formed by the coolant filled in the spiral cooling channel 113; the cooled coolant flows into the coolant outlet main pipeline 22 through the coolant outlet branch pipeline 221, and can be recycled later to reduce production costs. The coolant inlet main pipeline 21 and the coolant outlet main pipeline 22 of the coolant pipeline system 20 can be set in the seat body 23.

[0023] The inlet end of the cooling tube 11 is provided with a sealing step 115 that docks with the extrusion port of the molding die 100, so as to ensure that the rod extruded by the extrusion die 100 directly enters the cooling tube 11 to avoid leakage. The cross section of the inner tube 112 is circular or polygonal, and its shape is changed according to the actual needs of the user. For example, if a round rod-shaped product is required, the shape of the inner tube 112 is designed to be cylindrical.

[0024] like Figure 3As shown, the spiral cooling channel 113 is divided into a fast cooling section 11301 and a slow cooling section 11302, and the fast cooling section 11301 and the slow cooling section 11302 are connected through a connecting pipe 114. The cooling section 11301 is arranged at one end close to the extrusion die 100, and the length of the fast cooling section 11301 is less than the length of the slow cooling section 11302. The coolant inlet branch pipeline 211 is connected to the fast cooling section 11301, and the slow cooling section 11302 is connected to the coolant outlet branch pipeline 221. In this way, the coolant flow rate in the fast cooling section 11301 is faster than the coolant flow rate in the slow cooling section 11302. The rod extruded from the extrusion die 100 first enters the fast cooling section 11301 in the cooling tube 11 for fast cooling, so that the surface of the rod is quickly cooled and shaped, and then enters the slow cooling section 11302 in the cooling tube 11 for cooling.

[0025] The spiral cooling channel 113 is arranged on the outer wall of the inner tube 112. The complete spiral cooling channel 113 can be formed by splicing an inner tube with a fast cooling section 11301 spiral cooling channel 113 and an inner tube with a slow cooling section 11302 spiral cooling channel 113. The spiral angle of the spiral cooling channel 113 is 30-60 degrees, and the spiral angle of the spiral cooling channel 113 can be adjusted according to the type of coolant. The coolant can be water at a suitable temperature, or other coolants can be selected.

[0026] Each layer of cooling modules 10 is mounted on a mounting plate 30 . A docking port 31 is provided on the mounting plate 30 for docking with the outlet end of each cooling pipe. The mounting plate 30 is mounted on the molding die 100 via a support rod 32 .

[0027] As a preferred embodiment, the two-layer cooling module 10 is arranged up and down, and the upper coolant pipeline system 201 corresponds to the upper cooling tube 11, and the lower coolant pipeline system 202 corresponds to the lower cooling tube 11; the coolant inlet branch pipeline 211 and the coolant outlet branch pipeline 221 in the upper coolant pipeline system are connected to the corresponding spiral cooling channel 113 in the upper cooling tube, and the coolant inlet branch pipeline 211 and the coolant outlet branch pipeline 221 in the lower coolant pipeline system 202 are connected to the corresponding spiral cooling channel 113 in the lower cooling tube, so that the upper coolant pipeline system 201 quickly cools the product in the upper cooling tube 11, and the lower coolant pipeline system 202 quickly cools the product in the lower cooling tube 11, and cools at the same time to improve efficiency. Meanwhile, the coolant inlet main line and the coolant outlet main line in the upper coolant pipeline system are arranged in the upper seat body 2301; the coolant inlet main line and the coolant outlet main line in the lower coolant pipeline system are arranged in the lower seat body 2302. The upper seat body 2301 and the lower seat body 2302 are arranged on the bracket 200. The cooling molding mechanism, the bracket 200 and the extrusion die 100 are all installed on the frame 300.

[0028] The number of cooling tubes 11 in each layer of the cooling module 10 in the multi-layer rod extrusion die cooling molding mechanism can be the same or different. Figure 1 and Figure 2 As shown, the cooling molding mechanism for the multi-layer rod extrusion mold includes two layers of cooling modules 10 arranged in an upper and lower manner, the upper cooling module 10 includes seven cooling pipes 11, the lower cooling module 10 includes seven cooling pipes 11, the upper coolant pipeline system 201 is connected with seven coolant inlet branch pipelines 211 and seven coolant outlet branch pipelines 221, the coolant inlet branch pipelines 211 and the coolant outlet branch pipelines 221 are connected with the corresponding spiral cooling channels 113 in the upper cooling pipes; the lower coolant pipeline system 202 is connected with seven coolant inlet branch pipelines 211 and seven coolant outlet branch pipelines 221, the coolant inlet branch pipelines 211 and the coolant outlet branch pipelines 221 are connected with the corresponding spiral cooling channels 113 in the lower cooling pipes.

[0029] In summary, the technical solution of the utility model can fully and effectively achieve the above-mentioned utility model purpose, and the structure and functional principle of the utility model have been fully verified in the embodiments, and can achieve the expected effect and purpose. Without departing from the principle and essence of the utility model, various changes or modifications can be made to the embodiments of the utility model. Therefore, the utility model includes all replacement contents within the scope mentioned in the scope of the patent application, and any equivalent changes made within the scope of the patent application of the utility model are within the scope of the patent application of this case.

Claims

1. A cooling molding mechanism for a multi-layer rod extrusion die, characterized in that: It comprises at least two layers of cooling modules arranged in a longitudinal direction, each layer of cooling modules comprises at least one cooling tube, the cooling tube comprises an outer tube, an inner tube inserted in the outer tube and a spiral cooling channel arranged between the outer tube and the inner tube; each spiral cooling channel is connected with a cooling liquid pipeline system, the cooling liquid pipeline system comprises a cooling liquid inlet main pipeline and a cooling liquid outlet main pipeline, the cooling liquid inlet main pipeline is connected with a cooling liquid inlet branch pipeline connected with each spiral cooling channel, and the cooling liquid outlet main pipeline is connected with a cooling liquid outlet branch pipeline connected with each spiral cooling channel.

2. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 1, characterized in that: The spiral cooling channel is divided into a fast cooling section and a slow cooling section, and the fast cooling section is connected with the slow cooling section through a connecting pipe.

3. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 2, characterized in that: The length of the fast cooling section is shorter than that of the slow cooling section, the coolant inlet branch pipeline is connected to the fast cooling section, and the slow cooling section is connected to the coolant outlet branch pipeline.

4. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 2, characterized in that: The spiral cooling channel is arranged on the outer wall of the inner tube.

5. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 1, characterized in that: The coolant inlet main passage and the coolant outlet main passage are arranged in the seat body.

6. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 1, characterized in that: Each layer of cooling module corresponds to a coolant pipeline system; the coolant inlet main pipeline is connected to at least one coolant inlet branch pipeline, the coolant inlet branch pipeline is connected to the corresponding spiral cooling channel, the coolant outlet main pipeline is connected to at least one coolant outlet branch pipeline, and the coolant outlet branch pipeline is connected to the corresponding spiral cooling channel.

7. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 6, characterized in that: The two-layer cooling module is arranged up and down, and the upper coolant pipeline system corresponds to the upper cooling pipe, and the lower coolant pipeline system corresponds to the lower cooling pipe; the coolant inlet branch pipeline and the coolant outlet branch pipeline in the upper coolant pipeline system are connected to the corresponding spiral cooling channel in the upper cooling pipe, and the coolant inlet branch pipeline and the coolant outlet branch pipeline in the lower coolant pipeline system are connected to the corresponding spiral cooling channel in the lower cooling pipe.

8. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 7, characterized in that: The coolant inlet main line and the coolant outlet main line in the upper coolant pipeline system are arranged in the upper seat body; the coolant inlet main line and the coolant outlet main line in the lower coolant pipeline system are arranged in the lower seat body.

9. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 1, characterized in that: The inlet end of the cooling pipe is provided with a sealing step which is butted against the extrusion port of the forming die.

10. The cooling molding mechanism for a multi-layer rod extrusion die according to claim 1, characterized in that: Each layer of cooling modules is installed on a mounting plate, and a docking port for docking with the outlet end of each cooling pipe is provided on the mounting plate. The mounting plate is installed on the forming mold through a supporting rod.

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