Multi-layer bar extrusion device

Abstract

The utility model provides a multilayer bar extrusion device, relates to bar extruder field, including extrusion die mechanism and cooling shaping mechanism, extrusion die mechanism includes template, the template is equipped with the glue inlet runner and at least two layers of glue outlet runner group that are arranged in the longitudinal direction, each layer of glue outlet runner group includes at least one glue outlet runner, and the cooling shaping mechanism is equipped with the glue inlet runner and the at least two layers of glue outlet runner groups that are arranged in the longitudinal direction. The glue inlet runner is communicated with each glue outlet runner through a glue dividing runner, and a glue outlet port of each glue outlet runner is communicated with an extrusion channel group; and the cooling and shaping mechanism comprises a cooling liquid pipeline system and at least two layers of cooling modules which are longitudinally arranged. Compared with the prior art, the multi-layer bar extrusion device can extrude at least two layers of bars through the die, the extruded bars are rapidly cooled and formed by adopting cooling liquid filled in the spiral cooling channels in the cooling pipes, and the extruded bars are synchronously stretched and moved by combining the roller frame with the traction machines which are arranged up and down, so that the production efficiency is improved, and the production cost is reduced. Occupied area is reduced, resources are saved, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of rod extruders, in particular to a multi-layer rod extrusion device. Background Art

[0002] The rods of polymer materials generally go through the steps of melt plasticization, extrusion, cooling and cutting when they are formed. However, the existing rod extruder can only extrude single-layer rods, with low production efficiency, uneven uniformity of extruded rods, low product quality, and spray cooling or immersion cooling when cooling and forming. The cooling speed is slow, the area occupied is large, the coolant cannot be recycled, wastes resources, and the production cost is high. Utility Model Content

[0003] In view of the above problems, the utility model provides a multi-layer rod extrusion device, which can be used for extruding double-layer rods, has high production efficiency, can quickly cool and shape the extruded rods, occupies a small area, saves resources, and reduces production costs.

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

[0005] A multi-layer rod extrusion device comprises an extrusion die mechanism docked with an upstream screw feeding mechanism and a cooling and shaping mechanism for shaping the rods passing through the extrusion die, wherein the extrusion die mechanism comprises a template, on which a glue inlet flow channel and at least two layers of glue outlet flow channel groups arranged in a longitudinal direction are provided, each layer of the glue outlet flow channel group comprises at least one glue outlet flow channel, the glue inlet flow channel is connected to each glue outlet flow channel through a glue distribution flow channel, and the glue outlet port of each glue outlet flow channel is connected to an extrusion channel group; the cooling and shaping mechanism comprises a coolant pipeline system and at least two layers of cooling modules arranged in a longitudinal direction, each layer of the 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, the inner pipe of each cooling pipe is sealed and docked with the corresponding glue outlet flow channel, and the spiral cooling channel of each cooling pipe is connected to the coolant pipeline system.

[0006] Preferably, the template includes a first template and a second template bonded to the first template, the glue inlet flow channel is arranged on the first template, and the glue inlet flow channel is connected to a glue distribution channel; a multi-layer glue outlet flow channel group is arranged on the second template, each extrusion channel group includes multiple extrusion channels, and the extrusion channels are distributed around the center of the glue outlet flow channel.

[0007] More preferably, the glue outlet ports of the glue outlet channels correspond to extrusion disks, and the extrusion channels in the extrusion channel group are arranged on the extrusion disks; and the extrusion channels are radially distributed around the center of the glue outlet channels.

[0008] More preferably, the cross-sections of the glue inlet port and the glue outlet port in each glue outlet channel are conical; the glue inlet port of the glue outlet channel is arranged on the inner side of the second template, and the glue outlet port of the glue outlet channel is arranged on the outer side of the second template.

[0009] Preferably, the coolant pipeline system includes a coolant inlet main pipeline and a coolant outlet main pipeline, the coolant inlet main pipeline is connected to at least one coolant inlet branch pipeline, each coolant inlet branch pipeline is connected to each spiral cooling channel, and the coolant outlet main pipeline is connected to at least one coolant outlet branch pipeline, each coolant outlet branch pipeline is connected to each spiral cooling channel.

[0010] More preferably, the coolant inlet main line and the coolant outlet main line in each coolant pipeline system are arranged in the seat body.

[0011] Preferably, the spiral cooling channel is divided into a fast cooling section and a slow cooling section, and the fast cooling section is connected to the slow cooling section through a connecting pipe; the length of the fast cooling section is smaller than the length 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.

[0012] Preferably, the inlet end of the inner cylinder in the cooling tube is provided with a sealing step that docks with the extrusion port of the extrusion channel in the extrusion die mechanism.

[0013] Preferably, the cooling and forming mechanism is also connected to a traction mechanism, which includes a traction frame, in which at least one roller frame for placing and positioning the upper and lower rods is arranged, and traction machines for driving the rods to move are respectively arranged above and below the roller frame. The roller frame includes a frame body, in which at least two connecting shafts are arranged, each connecting shaft is sleeved with at least two transmission rollers, and the transmission rollers are provided with positioning grooves for positioning the rods.

[0014] More preferably, the traction machine is arranged between two clamping plates, each clamping plate is provided with a first mounting seat which cooperates with the support rod on the traction frame, and the traction machine is positioned on the support rod by a hydraulic system; at least one cylinder for adjusting the distance between the upper traction machine and the lower traction machine is also provided between the upper clamping plate and the lower clamping plate on the same side.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a multi-layer rod extrusion device, which can extrude at least two layers of rods through a mold, and uses the coolant filled in the spiral cooling channel in each cooling tube to quickly cool and shape the extruded rods, and uses a roller frame combined with upper and lower traction machines to synchronously stretch and move the extruded double-layer rods to ensure that they maintain a stable speed and shape during the extrusion process, thereby improving production efficiency, reducing occupied area, saving resources, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , is a schematic diagram of a multi-layer rod extrusion device provided by the utility model;

[0017] Figure 2 , which is a schematic diagram of an extrusion die mechanism and a cooling and shaping mechanism in a multi-layer rod extrusion device provided by the utility model;

[0018] Figure 3 , which is an exploded view of an extrusion die mechanism and a cooling and shaping mechanism in a multi-layer rod extrusion device provided by the utility model;

[0019] Figure 4 , which is a schematic diagram of an extrusion die mechanism in a multi-layer rod extrusion device provided by the utility model Figure 1 ;

[0020] Figure 5 , which is a schematic diagram of an extrusion die mechanism in a multi-layer rod extrusion device provided by the utility model Figure 2 ;

[0021] Figure 6 , which is an exploded diagram of an extrusion die mechanism in a multi-layer rod extrusion device provided by the utility model;

[0022] Figure 7 , is a cross-sectional view of a die in a multi-layer rod extrusion device provided by the utility model;

[0023] Figure 8 , is a cross-sectional view of a second template in a multi-layer rod extrusion device provided by the utility model;

[0024] Fig. 9 , which is an exploded view of a cooling tube in a multi-layer rod extrusion device provided by the utility model;

[0025] Fig.10 , which is a top view of a cooling and shaping mechanism in a multi-layer rod extrusion device provided by the utility model;

[0026] Fig.11 , which is a cross-sectional view of the cooling and shaping mechanism at AA in a multi-layer rod extrusion device provided by the utility model;

[0027] Fig.12 , which is a cross-sectional view at BB of a cooling and shaping mechanism in a multi-layer rod extrusion device provided by the utility model;

[0028] Fig.13 , which is a schematic diagram of a traction mechanism in a multi-layer rod extrusion device provided by the utility model;

[0029] Fig.14, which is an exploded diagram of a traction mechanism in a multi-layer rod extrusion device provided by the utility model;

[0030] Fig.15 , which is a schematic diagram of a multi-layer rod extrusion device provided by the utility model, in which a transmission roller is sleeved on a connecting shaft;

[0031] Fig.16 , is a schematic diagram of a transmission roller in a multi-layer rod extrusion device provided by the utility model;

[0032] Fig.17 , which is a schematic diagram of placing upper layer bars and lower layer bars on a roller frame in a multi-layer bar extrusion device provided by the utility model;

[0033] Fig.18 , which is a schematic diagram of a multi-layer rod extrusion device provided by the utility model being applied to a rod extrusion production line. DETAILED DESCRIPTION

[0034] The preferred implementation modes provided by the utility model are described in detail according to the accompanying drawings.

[0035] Figures 1 to 18 , which is a preferred embodiment of a multi-layer rod extrusion device provided by the utility model. Figures 1 to 18As shown, the multi-layer rod extrusion device includes an extrusion mold mechanism 10 connected to an upstream screw feeding mechanism and a cooling and shaping mechanism 20 for shaping the rod passing through the extrusion mold, the extrusion mold mechanism 10 includes a template 11, the template 11 is provided with a glue feed channel 12 and at least two layers of glue outlet flow channel groups arranged in a longitudinal direction, each layer of the glue outlet flow channel group includes at least one glue outlet flow channel 13, the glue feed channel 12 is connected to each glue outlet flow channel through a glue distribution channel 14, and the glue outlet port of each glue outlet flow channel 13 is connected to an extrusion channel group 15; the cooling and shaping mechanism 20 includes a coolant pipeline system 21 and at least two layers of cooling modules 22 arranged in a longitudinal direction, each layer of the cooling module 22 includes at least one cooling pipe 221, and the cooling pipe 221 includes an outer tube 2211, an inner tube 2212 inserted into the outer tube 2211, and an inner tube 2212 arranged in the outer tube 2211. In the spiral cooling channel 2213 between the outer tube and the inner tube, the inner tube 2212 of each cooling tube 221 is sealed and connected with the glue outlet channel 13, and the spiral cooling channel 2213 of each cooling tube 221 is connected with the coolant pipeline system 21; in this way, the molten material transmitted by the upstream screw feeding mechanism enters the template 11 from the glue inlet channel 12, and enters each glue outlet channel 13 in each layer of the glue outlet channel group after being diverted by the glue distribution channel 14; the molten material flowing out of the glue outlet channel 13 is extruded through the corresponding extrusion channel group 15 to form a rod, and the extruded rod enters the inner tube 2212 of the corresponding cooling tube 221, and the coolant in the coolant pipeline system 21 enters the spiral cooling channel 2213, and the rod in the inner tube 2212 is quickly cooled and shaped, and the cooled coolant can be subsequently recycled to reduce production costs.

[0036] like Figures 2 to 8 As shown, the template 11 includes a first template 111 and a second template 112 bonded to the first template, the glue feed channel 12 is connected to a glue separation channel 14, the liquid inlet 121 of the glue feed channel 12 is arranged on the outer side of the first template 11, the liquid inlet 121 is connected to the upstream screw feeding mechanism, and the glue separation channel 14 is arranged on the inner side of the first template 111; the double-layer glue outlet channel group is arranged on the second template 112. The glue separation channel 14 includes a mainstream channel 141 connected to the liquid inlet of the glue feed channel and at least two branch channels 142 connected to the mainstream channel, each branch channel 142 corresponds to each layer of the glue outlet channel group, and the glue outlet channel 13 in each layer of the glue outlet channel group is connected to the corresponding branch channel 142. For the convenience of processing, each glue outlet channel 13 in each layer of the glue outlet channel group can be distributed in a horizontal straight line.

[0037] Each extrusion channel group 15 includes a plurality of extrusion channels 151, which are distributed around the center of the glue outlet flow channel 13. The molten material flowing out of the glue outlet flow channel 13 is extruded through the extrusion channels 151 to form a uniform rod. The glue outlet ports of each glue outlet flow channel correspond to the extrusion disk 16, and each extrusion channel 151 in the extrusion channel group 15 is arranged on the extrusion disk 16; each extrusion channel 151 is radially distributed around the center of the glue outlet flow channel 13, so that each extrusion channel 151 flows out the molten material at multiple angles to form a rod, and the rod is uniformly formed with a uniform density.

[0038] The second template 112 is provided with a plurality of placement grooves 1121, which are arranged on the outer side of the second template, each placement groove 1121 corresponds to each glue outlet channel 13, and a step is formed between the placement groove 1121 and the glue outlet port of the glue outlet channel 13. The extrusion disc 16 is placed in the placement groove 1121 to prevent the extrusion disc 13 from falling off at will, and is conducive to the insertion of the inner cylinder 2212 in each cooling tube 221 to form a sealed connection.

[0039] like Figure 8 As shown, the cross-sections of the glue inlet port 131 and the glue outlet port 132 in each glue outlet channel 13 are tapered; the glue inlet port 131 of the glue outlet channel is arranged on the inner side of the second template 112, and the glue outlet port 132 of the glue outlet channel 13 is arranged on the outer side of the second template 112; the tapered port can accumulate materials, guide the materials into subsequent channels, and evenly fill the entire channel; and can reduce the dead angles or dead areas at both ends of the glue outlet channel 13, avoid stagnation or jamming of materials in these areas, thereby reducing material loss and waste, and improving production efficiency and product quality.

[0040] like Figure 2 , Figure 3 as well as Figures 9 to 12As shown, each layer of cooling module corresponds to a coolant pipeline system; the coolant pipeline system 21 includes a coolant inlet main pipeline 211 and a coolant outlet main pipeline 212, the coolant inlet main pipeline 211 is connected to at least one coolant inlet branch pipeline 2111, each coolant inlet branch pipeline 2111 is connected to each spiral cooling channel 2213, the coolant outlet main pipeline 212 is connected to at least one coolant outlet branch pipeline 2121, each coolant outlet branch pipeline 2121 is connected to each spiral cooling channel 2213, The spiral cooling channel 2213 is connected, and the coolant entering the coolant inlet main line 211 is divided into each coolant inlet branch line 2111, and then enters the spiral cooling channel 2213 of the cooling pipe 221. After the rod extruded from the extrusion die mechanism enters the cooling pipe 211, it is quickly cooled and formed by the coolant filled in the spiral cooling channel 2113; the cooled coolant flows into the coolant outlet main line 212 through the coolant outlet branch line 2121, and can be recycled later to reduce production costs. The coolant inlet main line and the coolant outlet main line in each coolant pipeline system are arranged in the seat body 23.

[0041] like Fig. 9 As shown, the spiral cooling channel 2213 is divided into a fast cooling section 22131 and a slow cooling section 22132, and the fast cooling section 22131 is connected to the slow cooling section 22132 through a connecting pipe 22133; the length of the fast cooling section 22131 is smaller than the length of the slow cooling section 22132, the coolant inlet branch pipeline 2111 is connected to the fast cooling section 22131, and the slow cooling section 22132 is connected to the coolant outlet branch pipeline 2121; in this way, the coolant flow rate in the fast cooling section 22131 is faster than the coolant flow rate in the slow cooling section 22132, and the rod extruded from the extrusion die mechanism 10 first enters the fast cooling section 22131 in the cooling pipe 211 for fast cooling, so that the surface of the rod is quickly cooled and shaped, and then enters the slow cooling section 22132 in the cooling pipe 211 for cooling.

[0042] The inlet end of the inner cylinder 2112 in the cooling tube 211 is provided with a sealing step 2114 that docks with the extrusion port of the extrusion flow channel 13 in the extrusion die mechanism 10, so as to ensure that the rod 100 extruded from the extrusion die mechanism 10 directly enters the cooling tube 11 to avoid leakage. The cross section of the inner cylinder 2112 is circular or polygonal, and the change of its shape is determined according to the actual needs of the user. For example, if a round rod-shaped product is required, the shape of the inner cylinder 2112 is designed to be cylindrical.

[0043] like Figures 10 to 12As shown, as a preferred embodiment, the extrusion flow channel 13 in the extrusion die mechanism 10 is arranged in upper and lower layers, and correspondingly, the cooling pipe 211 is arranged in upper and lower layers, so that the cooling system 21 is divided into an upper coolant pipeline system 2101 located above the upper cooling pipe and a lower coolant pipeline system 2102 located above the lower cooling pipe, the coolant inlet branch pipeline 2111 and the coolant outlet branch pipeline 2121 in the upper coolant pipeline system 2101 are connected to the corresponding spiral cooling channel 2113 in the upper cooling pipe 211, and the coolant inlet branch pipeline 2111 and the coolant outlet branch pipeline 2121 in the lower coolant pipeline system 2101 are connected to the corresponding spiral cooling channel 2113 in the lower cooling pipe 211, so that the upper cooling pipe corresponds to the upper coolant pipeline system 2101, and the lower cooling pipe corresponds to the lower coolant pipeline system 2102, so that the rod is cooled quickly and the efficiency is improved. An upper seat body 2301 is provided above the upper cooling pipe 211, and the cooling liquid inlet main line 211 and the cooling liquid outlet main line 212 in the upper cooling liquid pipeline system 2101 are arranged in the upper seat body 2301; a lower seat body 2302 is provided below the lower cooling pipe 211, and the cooling liquid inlet main line 211 and the cooling liquid outlet main line 212 in the lower cooling liquid pipeline system 2102 are arranged in the lower seat body 2302. The upper seat body 2301 and the lower seat body 2302 are arranged on the bracket 24. Each group of cooling modules 22 is installed on the mounting plate 25, and the mounting plate 25 is provided with a docking port 251 docking with the outlet end of each cooling pipe, and the mounting plate 25 is installed as a whole with the mold 11 through the support rod 252. The extrusion mold mechanism 10 and the cooling molding mechanism 20 are both installed on the frame 40.

[0044] like Figures 13 to 17 As shown, the cooling and forming mechanism 20 is also connected to a traction mechanism 30, which is used to synchronously stretch and move the extruded multi-layer rod to ensure that it maintains a stable speed and shape during the extrusion process, improve product quality, have strong adaptability, and enhance production continuity.

[0045] The traction mechanism 30 includes a traction frame 31, in which at least one roller frame 32 for placing and positioning the upper layer of rods and the lower layer of rods is arranged, and traction machines 33 for driving the rods to move are respectively arranged above and below the roller frame 32, and the roller frame 32 includes a frame body 321, in which at least two connecting shafts 322 are arranged, each connecting shaft 321 is sleeved with at least two transmission rollers 323, and the transmission rollers 323 are provided with positioning grooves 3231 for positioning the rods; after the multi-layer rods formed by cooling are transmitted out, the multi-layer rods can be divided into a plurality of double-layer rods, and each double-layer rod enters the corresponding roller frame 32, the bottom of the rod in the upper layer is located in the positioning groove 3231 on the corresponding transmission roller 323, and the top of the rod in the lower layer is located in the positioning groove 3231 on the corresponding transmission roller 323, and the traction machine 33 at the top and the traction machine 33 at the bottom synchronously stretch and move the extruded double-layer rods. The traction mechanism can be applied to the transmission of even-numbered layers of rods or odd-numbered layers of rods. The rods in a single layer enter the corresponding roller rack 21 and are synchronously stretched and moved by the upper traction machine 30 or the lower traction machine 30.

[0046] The positioning groove 3231 is arranged on the side wall of the transmission roller 323, including a groove bottom surface 32311 and two groove side surfaces 32312 arranged on both sides of the groove bottom surface. The two groove side surfaces 32312 are arranged at an angle, so that the cross-section of the entire positioning groove 3231 is an inverted trapezoid, similar to a V-shape, which can be suitable for rods of different diameters to position the rods.

[0047] The number of transmission rollers 323 on the connecting shaft 322 is set as needed, and the upper layer of rods 100 is staggered with the lower layer of rods 100. The upper layer of rods and the lower layer of rods correspond to different transmission rollers 323, so that the upper tractor 33 and the lower tractor 33 can be conveniently stretched and moved synchronously after extrusion of the double-layer rods. Fig.13 and Fig.14 As shown, nine transmission rollers 323 are provided on the connecting shaft 322, four of which correspond to the four rods 100 on the upper layer, and five of which correspond to the five rods 100 on the lower layer. The rods 100 on the upper layer are staggered with the rods 100 on the lower layer.

[0048] The traction machine 33 includes a traction crawler 331 that fits the surface of the rod, a driving shaft 332 and a driven shaft 333 for driving the traction crawler. The traction crawler 331 is sleeved on the driving shaft 332 and the driven shaft 333, and the driving shaft is connected to a driver 334. The traction crawler 331 is usually made of wear-resistant rubber or other elastic materials to ensure that it provides sufficient friction and traction when in contact with the surface of the rod, while reducing damage to the surface of the rod. The surface of the traction crawler 331 can be textured to increase the contact area with the extruded rod and improve the traction effect. The driver 334 is an electric motor or other appropriate power device. The driver 334 transmits power to the traction track 331 through the driving shaft 332 and the driven shaft 333, so as to drive the traction track 331 to rotate. When the driver 334 drives the traction track 331 to start rotating, the surface of the traction track 331 contacts the rod and generates sufficient friction to drive the rod to move along the extrusion direction. The design and friction of the traction track 331 ensure that the rod will not slip or lose control during the traction process, thereby maintaining a stable extrusion speed and shape.

[0049] The traction machine 33 is arranged between two clamping plates 34, and each clamping plate 34 is provided with a first mounting seat 341 that cooperates with the support rod 311 on the traction frame 31. The traction machine 33 is positioned on the support rod 311 by a hydraulic system; at least one cylinder for adjusting the distance between the upper traction machine and the lower traction machine is also provided between the upper clamping plate 34 and the lower clamping plate 34 on the same side. The cylinder can be used to adjust the distance between the upper traction machine 33 and the lower traction machine 33 to adapt to rods of different sizes, ensuring that the traction tracks 331 on the upper traction machine 33 and the lower traction machine 33 can both contact the surface of the rod 100 on the frame body 321.

[0050] Each clamp plate 34 is also provided with a second mounting seat 342, and the frame body 321 is provided with a third mounting seat 3212 corresponding to the second mounting seat 342. The frame body 321 is installed between the upper tractor 33 and the lower tractor 33 by means of a screw passing through the second mounting seat 342 on the lower tractor, the third mounting seat 3212 and the second mounting seat 342 on the upper tractor.

[0051] As a preferred embodiment, the template 11 is provided with an upper and lower glue outlet flow channel group, the upper glue outlet flow channel group includes 4 glue outlet flow channels 13, and the lower glue outlet flow channel group includes 5 glue outlet flow channels 13; two layers of cooling modules 22 are arranged longitudinally, the upper cooling module 22 includes 4 cooling pipes, and the lower cooling module 22 includes 5 cooling pipes, and the inner tube 2212 of each cooling pipe 221 is sealed and connected with the glue outlet flow channel 13, and a roller frame 32 is provided in the traction mechanism 30, and the upper and lower parts of the roller frame 32 are respectively provided with rollers for driving the rod The mobile tractor 33 has the following specific working process: 1) Extrusion: The molten material delivered by the upstream screw feeding mechanism enters the mold plate 11 from the glue inlet channel 12, and enters the 4 glue outlet channels 13 of the upper glue outlet channel group and the 5 glue outlet channels 13 of the lower glue outlet channel group after being diverted by the glue distribution channel 14. The molten material flowing out of the glue outlet channel 13 passes through the corresponding extrusion disk 16 to form 4 rods 100 in the upper layer and 5 rods 100 in the lower layer; 2) The 4 rods 100 in the upper layer and the 5 rods in the lower layer The cooling liquid enters the inner cylinder 2212 of each cooling tube 221 respectively, and the cooling liquid entering the cooling liquid inlet main line 211 is divided into each cooling liquid inlet branch line 2111, and then enters the spiral cooling channel 2213 of the cooling tube 221. The cooling liquid filled in the spiral cooling channel 2113 is used to quickly cool and shape the rod in the inner cylinder 2212. The cooled cooling liquid flows into the cooling liquid outlet main line 212 through the cooling liquid outlet branch line 2121, and can be recycled later; 3) The four rods 100 in the upper layer and the four rods 100 in the lower layer After the five rods 100 are cooled and formed, they enter the roller frame 32, the four rods 100 on the upper layer are in the positioning grooves 3231 of the four transmission rollers 323, and the five rods 100 on the lower layer are in the positioning grooves 3231 of the five transmission rollers 323. The rods 100 on the upper layer are staggered with the rods 100 on the lower layer, and the surfaces of the traction tracks 331 of the upper tractor 33 and the lower tractor 33 are in contact with the rods, and the upper tractor 33 and the lower tractor 33 synchronously stretch and move the extruded double-layer rods.

[0052] 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 multi-layer rod extrusion device, comprising an extrusion die mechanism docked with an upstream screw feeding mechanism and a cooling and shaping mechanism for shaping the rod passing through the extrusion die, characterized in that: The extrusion mold mechanism includes a template, on which are provided a glue inlet flow channel and at least two layers of glue outlet flow channel groups arranged longitudinally, each layer of the glue outlet flow channel group includes at least one glue outlet flow channel, the glue inlet flow channel is connected to each glue outlet flow channel through a glue distribution flow channel, and the glue outlet port of each glue outlet flow channel is connected to the extrusion channel group; the cooling and shaping mechanism includes a coolant pipeline system and at least two layers of cooling modules arranged longitudinally, each layer of the cooling module includes at least one cooling pipe, the cooling pipe includes 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, the inner pipe of each cooling pipe is sealed and connected to the corresponding glue outlet flow channel, and the spiral cooling channel of each cooling pipe is connected to the coolant pipeline system.

2. The multi-layer rod extrusion device according to claim 1, characterized in that: The template includes a first template and a second template bonded to the first template. The glue inlet flow channel is arranged on the first template, and the glue inlet flow channel is connected to a glue separation channel. The double-layer glue outlet flow channel group is arranged on the second template, and each extrusion channel group includes multiple extrusion channels, and the extrusion channels are distributed around the center of the glue outlet flow channel.

3. The multi-layer rod extrusion device according to claim 2, characterized in that: The glue outlet ports of the glue outlet flow channels correspond to extrusion disks respectively, and the extrusion channels in the extrusion channel group are arranged on the extrusion disks; the extrusion channels are radially distributed around the center of the glue outlet flow channel.

4. The multi-layer rod extrusion device according to claim 2, characterized in that: The cross sections of the glue inlet port and the glue outlet port in each glue outlet channel are conical; the glue inlet port of the glue outlet channel is arranged on the inner side of the second template, and the glue outlet port of the glue outlet channel is arranged on the outer side of the second template.

5. The multi-layer rod extrusion device according to claim 1, characterized in that: Each layer of cooling module corresponds to a coolant pipeline system; the coolant pipeline system includes a coolant inlet main pipeline and a coolant outlet main pipeline, the coolant inlet main pipeline is connected to at least one coolant inlet branch pipeline, each coolant inlet branch pipeline is connected to each spiral cooling channel, the coolant outlet main pipeline is connected to at least one coolant outlet branch pipeline, each coolant outlet branch pipeline is connected to each spiral cooling channel.

6. The multi-layer rod extrusion device according to claim 5, characterized in that: The coolant inlet main line and the coolant outlet main line in each coolant pipeline system are arranged in the seat body.

7. The multi-layer rod extrusion device according to claim 5, 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 to the slow cooling section through a connecting pipe; 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.

8. The multi-layer rod extrusion device according to claim 1, characterized in that: The inlet end of the inner cylinder in the cooling pipe is provided with a sealing step which is butted with the extrusion port of the extrusion flow channel in the extrusion die mechanism.

9. The multi-layer rod extrusion device according to claim 1, characterized in that: The cooling and shaping mechanism is also connected to a traction mechanism, which includes a traction frame, in which a roller frame for placing and positioning upper and lower rods is provided, and a traction machine for driving the rods to move is provided above and below the roller frame respectively. The roller frame includes a frame body, in which at least two connecting shafts are provided, each connecting shaft is sleeved with at least two transmission rollers, and the transmission rollers are provided with positioning grooves for positioning the rods.

10. The multi-layer rod extrusion device according to claim 9, characterized in that: The traction machine is arranged between two clamping plates, each clamping plate is provided with a first mounting seat which cooperates with the support rod on the traction frame, and the traction machine is positioned on the support rod by a hydraulic system; at least one cylinder for adjusting the distance between the upper traction machine and the lower traction machine is also provided between the upper clamping plate and the lower clamping plate on the same side.

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