Charging barrel cooling device of composite material forming injection molding machine

Abstract

The invention discloses a composite material forming injection molding machine charging barrel cooling device, and relates to the technical field of injection molding machines, the composite material forming injection molding machine charging barrel cooling device comprises an injection molding machine body and a charging barrel connected with the injection molding machine body, a cooling loop is arranged on the outer side of the charging barrel, and a refrigeration box communicating with the cooling loop is arranged on one side of the injection molding machine body; an air inlet pipe staggered with the cooling loop is arranged on the outer side of the charging barrel, a pipe orifice of the air inlet pipe penetrates through the inner side wall of the charging barrel and is communicated with the interior of the charging barrel, and a fan communicated with the air inlet pipe is arranged on one side of the injection molding machine body; a mounting seat is arranged at the joint of the charging barrel and the injection molding machine body, and a cooling loop is arranged in the mounting seat. Air is conveyed into the charging barrel through the air inlet pipe, so that hot air in the charging barrel is discharged through the heat dissipation holes formed in the charging barrel, the hot air diffused into the charging barrel by the injection molding machine body is cooled, plastic particles are prevented from being melted in the charging barrel, mutually bonded into blocks and blocking a discharging port of the charging barrel as much as possible, and the working efficiency of the injection molding machine is improved.

Description

Technical Field

[0001] This application relates to the technical field of injection molding machines, and in particular to a cooling device for the barrel of a composite material forming injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding machine or an injection machine, is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using plastic molding dies. Composite materials usually consist of a matrix resin (such as nylon, PEEK, polypropylene, etc.) and reinforcing materials (such as glass fibers, carbon fibers), and their thermal stability, melting temperature, and thermal degradation characteristics have strict requirements for processing temperature.

[0003] An injection molding machine can heat plastic, melt the plastic in the barrel that enters the body of the injection molding machine from the barrel, apply high pressure to the molten plastic, and eject it to fill the mold cavity.

[0004] Regarding the above related technologies, the inventor believes that the body of the injection molding machine is interconnected with the barrel. When the heating system in the body of the injection molding machine heats the plastic particles falling from the barrel, the temperature in the barrel gradually rises as the heating of the heating system starts, and the plastic particles melt in the barrel and stick together to form blocks, causing blockage of the discharge port of the barrel and affecting the working efficiency of the injection molding machine. Summary of the Invention

[0005] The purpose of this application is to provide a cooling device for the barrel of a composite material forming injection molding machine to improve the problem that when the heating system in the body of the injection molding machine heats the plastic particles falling from the barrel, the temperature in the barrel gradually rises as the heating of the heating system starts, the plastic particles melt in the barrel and stick together to form blocks, causing blockage of the discharge port of the barrel and affecting the working efficiency of the injection molding machine.

[0006] The cooling device for the barrel of a composite material forming injection molding machine provided by this application adopts the following technical solutions: The cooling device for the barrel of a composite material forming injection molding machine includes an injection molding machine body and a barrel connected to the injection molding machine body. A cooling circuit is provided on the outer side of the barrel. There is a refrigeration box connected to the cooling circuit on one side of the injection molding machine body. An air inlet pipe is provided on the outer side of the barrel and is arranged in an alternating manner with the cooling circuit. The pipe orifice of the air inlet pipe penetrates the inner wall of the barrel and communicates with the inside of the barrel. A blower is provided on one side of the injection molding machine body and is connected to the air inlet pipe. An installation seat is provided at the connection between the barrel and the injection molding machine body, and a cooling circuit is provided in the installation seat.

[0007] By adopting the above technical solution, the barrel is cooled through the cooling circuit outside the barrel, and the coolant flowing in the cooling circuit is cooled by the refrigeration box, so that the barrel can be cooled for a long time through the cooling circuit. The barrel and the injection molding machine body are connected through the mounting seat, and the mounting seat is cooled by the cooling circuit arranged in the mounting seat, reducing the temperature of the discharge port of the barrel and preventing the plastic particles from melting into blocks at the discharge port and blocking the discharge port. Air is conveyed into the barrel through the air inlet pipe, and the hot air inside the barrel is discharged through the heat dissipation holes opened on the barrel, cooling the hot air diffused into the barrel by the injection molding machine body and preventing the plastic particles from melting in the barrel and sticking to each other to form blocks and blocking the discharge port of the barrel.

[0008] Optionally, the cooling circuit includes a cooling box arranged outside the barrel and a first circulation pipeline communicated with the cooling box. The first circulation pipeline is communicated with the refrigeration box. A first delivery pump communicated with the first circulation pipeline is arranged outside the refrigeration box. The cooling box wraps around the circumferential side wall of the barrel, and the air inlet pipe penetrates through the cooling box along the side wall of the barrel.

[0009] By adopting the above technical solution, the coolant in the cooling box is sent into the refrigeration box through the first circulation pipeline by the first delivery pump for cooling. The cooling box in the cooling circuit is arranged to wrap around the outer side wall of the barrel, expanding the contact area with the barrel and accelerating the cooling speed in the barrel. The air inlet pipe penetrates through the cooling box along the side wall of the barrel, cooling the air in the air inlet pipe through the cooling box and enabling the temperature inside the barrel to drop rapidly.

[0010] Optionally, a communicating pipe is connected to the part of the air inlet pipe located in the cooling box. The communicating pipe is wound around the circumferential side wall of the material box for several turns, and a certain interval is maintained between the communicating pipes.

[0011] By adopting the above technical solution, the part of the air inlet pipe located in the cooling box is communicated with the communicating pipe. The communicating pipe is wound around the circumferential side wall of the material box for several turns, enabling the air flowing through the communicating pipe to be cooled rapidly and further accelerating the cooling speed inside the barrel.

[0012] Optionally, a stirring shaft is rotatably arranged in the barrel along its axial direction. A plurality of stirring blades are arranged on the side wall of the stirring shaft. A first driving member for driving the stirring shaft to rotate is arranged outside the barrel. A ventilation pipe is connected to the pipe orifice of the air inlet pipe located in the barrel, and the ventilation pipe is arranged in the axial direction of the stirring shaft.

[0013] By adopting the above technical solution, the driving member 1 drives the stirring shaft to rotate with the stirring blades, stirring the plastic particles in the barrel, reducing the possibility of melting and bonding due to the accumulation of plastic particles in the barrel. At the same time, the cold air blown out from the ventilation pipe connected to the air inlet pipe can diffuse among the plastic particles, accelerating the efficiency of reducing the temperature in the barrel. The ventilation pipe is arranged in the axial direction of the stirring shaft to cool the plastic particles located at the central position of the barrel.

[0014] Optionally, triangular brackets are fixedly connected to both ends of the stirring shaft of the barrel. The stirring shaft is rotatably connected to the triangular brackets. A communication hole is opened at one end of the stirring shaft away from the driving member 1. A rotary joint is threadedly connected to the stirring shaft at the position of the connection hole. The end of the rotary joint away from the stirring shaft is connected to the air inlet pipe in communication. The position of the communication hole on the side wall of the stirring shaft is connected to the ventilation pipe in communication.

[0015] By adopting the above technical solution, the position of the stirring shaft is determined by the triangular brackets, enabling the plastic particles to smoothly fall from the discharge port of the barrel through the triangular brackets. A communication hole is opened on the stirring shaft, and the position of the communication hole on the side wall of the stirring shaft is connected to the ventilation pipe in communication. The air inlet pipe is communicated with the communication hole through the rotary joint, enabling the ventilation pipe to rotate together with the stirring shaft while the air inlet pipe remains stationary, reducing the influence of the ventilation pipe on the stirring blades on the side wall of the stirring shaft and avoiding failures caused by the winding of the ventilation pipe on the stirring shaft.

[0016] Optionally, a branch air pipe is arranged in the direction of the stirring blade at the position of the ventilation pipe corresponding to the stirring blade. A blocking net for preventing plastic particles from entering is arranged at the pipe orifice of the branch air pipe.

[0017] By adopting the above technical solution, the ventilation pipe is provided with a branch air pipe in the direction of the stirring blade, and the cold air is released in the direction of the stirring blade through the branch air pipe, enabling the cold air to come into contact with the plastic particles in the barrel more evenly, cooling the plastic particles, and preventing the high temperature in the barrel from melting the plastic particles and bonding them into blocks as much as possible; the blocking net prevents plastic particles from entering the branch air pipe.

[0018] Optionally, a clamping ring 1 for fixing the branch air pipe is arranged on one side of the stirring blade close to the branch air pipe, and a clamping ring 2 for fixing the ventilation pipe is arranged on the outside of the stirring shaft.

[0019] By adopting the above technical solution, the branch air pipe is fixed to the side wall of the stirring blade by the clamping ring 1, and the ventilation pipe is fixed to the outside of the stirring shaft by the clamping ring 2, reducing the influence on the stirring of the plastic particles after the branch air pipe and the ventilation pipe are separated from the stirring blade and the stirring shaft; the ventilation pipe and the branch air pipe can be replaced by disassembling the clamping ring 1 and the clamping ring 2.

[0020] Optionally, a hopper connected to the barrel is provided in the mounting base. The discharge port of the hopper communicates with the injection molding machine body. A communication groove corresponding to the cooling circuit is formed in the side wall of the hopper. An anti-sticking coating is provided on the inner side wall of the barrel, and the anti-sticking coating extends towards the inner side wall of the hopper.

[0021] By adopting the above technical solution, the hopper and the barrel are integrally formed. Through the hopper, plastic particles directly enter the injection molding machine body from the discharge port. A communication groove corresponding to the cooling circuit is formed in the side wall of the hopper to cool the hopper and reduce the possibility of plastic particles melting on the hopper. Anti-sticking coatings are provided on the inner side walls of the barrel and the hopper to minimize the possibility of plastic particles adhering to the inner side walls of the barrel and the hopper at high temperatures.

[0022] Optionally, the cooling circuit includes a condensation tank filled with coolant formed in the mounting base. The condensation tank communicates with the communication groove. A second circulation pipeline communicating with the condensation tank penetrates through the outside of the mounting base. The second circulation pipeline communicates with the refrigeration box, and a second delivery pump communicating with the second circulation pipeline is provided outside the refrigeration box.

[0023] By adopting the above technical solution, a condensation tank filled with coolant is formed in the mounting base. The condensation tank communicates with the communication groove. The mounting base and the hopper are continuously cooled through the second circulation pipeline to minimize the possibility of plastic particles melting at the hopper position.

[0024] Optionally, a heat insulation cushion layer is provided between the mounting base and the injection molding machine body; a filter box is communicated between the air inlet pipe and the fan.

[0025] By adopting the above technical solution, the heat insulation cushion layer slows down the influence of the high temperature in the injection molding machine body on the mounting base; a filter box is communicated between the air inlet pipe and the fan, and the filter box filters impurities and moisture in the air sent by the fan into the air inlet pipe to reduce the influence on the quality of the finished product after the plastic particles are melted.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The barrel is cooled through the cooling circuit outside the barrel, and the coolant flowing in the cooling circuit is cooled by the refrigeration box, so that the barrel can be cooled for a long time through the cooling circuit. The barrel and the injection molding machine body are communicated through the mounting base, and the mounting base is cooled by the cooling circuit provided in the mounting base to reduce the temperature of the discharge port of the barrel and prevent plastic particles from melting into blocks at the discharge port and blocking the discharge port; air is conveyed into the barrel through the air inlet pipe, and the hot air inside the barrel is discharged through the heat dissipation holes formed in the barrel; the hot air diffused from the injection molding machine body into the barrel is cooled to prevent plastic particles from melting in the barrel, sticking to each other into blocks, and blocking the discharge port of the barrel; 2. The driving member drives the stirring shaft to rotate with the stirring blades to stir the plastic particles in the barrel, reducing the possibility of the plastic particles accumulating in the barrel and melting and bonding. At the same time, the cold air blown out from the air inlet pipe and the ventilation pipe can diffuse between the plastic particles, accelerating the efficiency of reducing the temperature in the barrel. The ventilation pipe is arranged in the axial direction of the stirring shaft to cool down some plastic particles located in the center of the barrel; 3. The hopper and the barrel are integrally formed, and the plastic particles enter the injection molding machine body directly from the discharge port through the hopper. A connecting groove corresponding to the cooling circuit is opened on the side wall of the hopper to cool the hopper and reduce the possibility of plastic particles melting on the hopper. An anti-stick coating is provided on the inner wall of the barrel and the hopper to minimize the possibility of plastic particles adhering to the inner wall of the barrel and the hopper at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of the barrel cooling device of the composite molding injection molding machine; Figure 2 It is a partial cross-sectional view of the barrel cooling device of the composite molding injection molding machine; Figure 3 It is a front cross-sectional view of a barrel cooling device for a composite molding injection molding machine.

[0028] In the figure, 1. injection molding machine body; 2. barrel; 21. heat dissipation hole; 22. stirring shaft; 221. connecting hole; 222. retaining ring 2; 23. stirring blade; 231. retaining ring 1; 24. driving part 1; 25. triangular bracket; 26. rotary joint; 27. anti-stick coating; 3. cooling circuit; 31. cooling box; 32. circulation pipeline 1; 33. delivery pump 1; 4. refrigeration box; 5. air inlet pipe; 51. fan; 52. connecting pipe; 53. ventilation pipe; 531. branch air duct; 532. barrier net; 54. filter box; 6. mounting seat; 61. cooling circuit; 611. condensation tank; 62. hopper; 63. connecting tank; 64. circulation pipeline 2; 65. delivery pump 2; 7. thermal insulation pad. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0030] Composite molding injection molding machine barrel cooling device, refer to Figure 1 and Figure 2, including an injection molding machine body 1 and a barrel 2 connected to the injection molding machine body 1. The top of the barrel 2 is connected to a pipeline for conveying plastic particles. A cooling circuit 3 is arranged outside the barrel 2. A refrigeration box 4 connected to the cooling circuit 3 is installed on one side of the injection molding machine body 1. A condenser (not shown in the figure) electrically connected to the power supply is installed in the refrigeration box 4 to cool the water in the refrigeration box 4; The cooling circuit 3 includes a cooling box 31 installed on the outside of the barrel 2 with bolts and gaskets, and a first circulation pipeline 32 hermetically connected to the cooling box 31. The cooling box 31 is arranged to wrap the circumferential side wall of the barrel 2. The cooling box 31 in the cooling circuit 3 is arranged to wrap the outer side wall of the barrel 2, expanding the contact area with the barrel 2 and accelerating the cooling rate in the barrel 2; The first circulation pipeline 32 is hermetically connected to the refrigeration box 4. A first delivery pump 33 electrically connected to the power supply and connected to the first circulation pipeline 32 is installed outside the refrigeration box 4. The first circulation pipeline 32 is composed of two parts of stainless steel water pipes hermetically connected to the refrigeration box 4 at the upper and lower ends of the cooling box 31. One section of the first circulation pipeline 32 is hermetically connected to the first delivery pump 33. The first delivery pump 33 conveys the cooling water in the refrigeration box 4 into the cooling box 31 through the first circulation pipeline 32 to cool the barrel 2, reducing the possibility of the plastic particles melting in the barrel 2 and enabling the plastic particles to smoothly enter the injection molding machine body 1 for melting and injection into the mold.

[0031] Refer to Figure 1 and Figure 2 , an air inlet pipe 5 is arranged outside the barrel 2 and is arranged in an alternating manner with the cooling circuit 3. The pipe orifice of the air inlet pipe 5 penetrates the inner side wall of the barrel 2 and communicates with the inside of the barrel 2. A blower 51 electrically connected to the power supply and connected to the air inlet pipe 5 is arranged on one side of the injection molding machine body 1. The blower 51 conveys air into the barrel 2, enabling the hot air inside the barrel 2 to be discharged through the heat dissipation holes 21 opened on the barrel 2; The air inlet pipe 5 penetrates the cooling box 31 along the side wall of the barrel 2, enabling the air in the air inlet pipe 5 to be cooled by the cooling box 31 and enabling the temperature inside the barrel 2 to drop rapidly.

[0032] Refer to Figure 2 and Figure 3, the part of the air inlet pipe 5 located in the cooling box 31 is connected with a communicating pipe 52. The communicating pipe 52 is made of stainless steel. The communicating pipe 52 is butted with the air inlet pipe 5 through a connecting flange (not shown in the figure) and fixed by bolts and gaskets. The communicating pipe 52 is arranged around the circumferential side wall of the material box in several circles, and there is a certain interval between the communicating pipes 52 to increase the contact area between the communicating pipe 52 located in the cooling box 31 and the cooling water, so that the air flowing through the communicating pipe 52 can be quickly cooled, and further accelerate the cooling speed inside the barrel 2; a stirring shaft 22 is rotatably connected to the barrel 2 along its axial direction through bearings. A number of stirring blades 23 are welded on the side wall of the stirring shaft 22. A driving member 24 for driving the stirring shaft 22 to rotate is installed outside the barrel 2. The driving member 24 is a driving motor electrically connected to the power supply. The driving member 24 drives the stirring shaft 22 to drive the stirring blades 23 to rotate to stir the plastic particles in the barrel 2 and reduce the possibility of the plastic particles melting and sticking due to the high temperature in the barrel 2; the pipe orifice of the air inlet pipe 5 located in the barrel 2 is hermetically connected with a ventilation pipe 53. The ventilation pipe 53 is made of stainless steel. The ventilation pipe 53 is arranged in the axial direction of the stirring shaft 22. Through the stirring of the stirring blades 23, the cold air blown out of the ventilation pipe 53 communicated with the air inlet pipe 5 can diffuse among the plastic particles, accelerating the efficiency of reducing the temperature in the barrel 2.

[0033] Refer to Figure 2 and Figure 3 , metal triangular brackets 25 are fixed to both ends of the stirring shaft 22 of the barrel 2 with bolts. The stirring shaft 22 is rotatably connected to the triangular brackets 25 through bearings. The position of the stirring shaft 22 is determined by the triangular brackets 25, reducing the jitter of the stirring shaft 22 during rotation, and at the same time enabling the plastic particles to smoothly pass through the triangular brackets 25 and fall from the discharge port of the barrel 2; a communication hole 221 is opened at one end of the stirring shaft 22 away from the driving member 24. A rotary joint 26 is threadedly connected at the position of the communication hole 221. The end of the rotary joint 26 away from the stirring shaft 22 is hermetically connected with the air inlet pipe 5 by clamping. The rotary joint 26 is divided into a fixed part threadedly connected with the communication hole 221 and a rotating part connected with the air inlet pipe 5. The two parts rotate independently. The communication hole 221 is hermetically connected with the ventilation pipe 53 at the position of the side wall of the stirring shaft 22. The air inlet pipe 5 is communicated with the communication hole 221 through the rotary joint 26, enabling the ventilation pipe 53 to rotate with the stirring shaft 22 and reducing the influence of the ventilation pipe 53 on the stirring blades 23 on the side wall of the stirring shaft 22.

[0034] Refer to Figure 2 and Figure 3, the ventilation pipe 53 is integrally formed with a communicating branch air duct 531 in a position corresponding to the stirring blade 23 in the direction of the stirring blade 23. Cold air is released through the branch air duct 531 in the direction of the stirring blade 23, so that the cold air can contact the plastic particles in the barrel 2 more evenly, cool the plastic particles, and prevent the high temperature in the barrel 2 from melting the plastic particles and sticking them together into blocks as much as possible; a blocking net 532 for preventing plastic particles from entering is installed at the nozzle of the branch air duct 531, and the blocking net 532 blocks the plastic particles located in the branch air duct 531 to avoid plastic particles entering the branch air duct 531 as much as possible; a first clamping ring 231 for fixing the branch air duct 531 is bolted to one side of the stirring blade 23 close to the branch air duct 531, and a second clamping ring 222 for fixing the ventilation pipe 53 is bolted to the outer side of the stirring shaft 22, reducing the influence on the stirring of plastic particles after the branch air duct 531 and the ventilation pipe 53 are separated from the stirring blade 23 and the stirring shaft 22.

[0035] Refer to Figure 1 and Figure 3 , a stainless steel mounting seat 6 is installed at the connection between the barrel 2 and the injection molding machine body 1. A hopper 62 connected to the barrel 2 is snap-fitted in the mounting seat 6. The discharge port of the hopper 62 communicates with the injection molding machine body 1. The mounting seat 6 supports the hopper 62 and the barrel 2. A communication groove 63 corresponding to the cooling circuit 61 is formed in the side wall of the hopper 62. An anti-sticking coating 27 is sprayed on the inner side wall of the barrel 2 and extends towards the inner side wall of the hopper 62. The anti-sticking coating 27 is made of a mixture of silicate and ceramic microspheres, reducing the possibility of plastic particles adhering to the inner side walls of the barrel 2 and the hopper 62 at high temperatures, and enabling the plastic particles to smoothly enter the injection molding machine body 1 for heating and melting.

[0036] Refer to Figure 1 and Figure 3, a cooling circuit 61 is provided in the mounting base 6. The cooling circuit 61 includes a condensation tank 611 filled with coolant opened in the mounting base 6. The condensation tank 611 communicates with a communication groove 63. A sealing ring made of heat-resistant rubber (not shown in the figure) is laid between the hopper 62 and the mounting base 6 to prevent cooling water from leaking out from the connection between the mounting base 6 and the hopper 62, which may affect the operation of the injection molding machine. A second circulation pipeline 64 communicating with the condensation tank 611 is provided through the outside of the mounting base 6. The second circulation pipeline 64 is connected to the refrigeration box 4. A second delivery pump 65 electrically connected to the power supply and connected to the second circulation pipeline 64 is installed outside the refrigeration box 4. The second circulation pipeline 64 is composed of two parts of stainless steel water pipes hermetically connected to the mounting base 6 and the refrigeration box 4. One section of the second circulation pipeline 64 is hermetically connected to the second delivery pump 65. The second delivery pump 65 sends the fixed cooling water in the refrigeration box 4 into the mounting base 6 and the hopper 62 through the second circulation pipeline 64 for continuous cooling, and tries to reduce the possibility of the plastic particles melting at the position of the hopper 62; An insulating cushion layer 7 made of aerogel felt is laid between the mounting base 6 and the injection molding machine body 1. The insulating cushion layer 7 slows down the influence of the high temperature in the injection molding machine body 1 on the mounting base 6, and tries to reduce the possibility that the plastic particles melt and bond into blocks at the discharge port of the hopper 62 and cause blockage; A filter box 54 is installed between the air inlet pipe 5 and the fan 51 with bolts and sealing rings to filter the air sent by the fan 51 into the air inlet pipe 5 and reduce the influence on the quality of the finished product after the plastic particles are melted.

[0037] The implementation principle of the embodiment of this application is as follows: In actual operation, after the plastic particles are fed into the barrel 2, the air blower 51 conveys air into the interior of the barrel 2 through the filter box 54 and the air inlet pipe 5. The water pump 33 conveys the cooling water in the refrigeration box 4 into the cooling box 31 through the first circulation pipeline 32 to cool down the barrel 2. The air in the air inlet pipe 5 is cooled through the connecting pipe 52 in the cooling box 31 to cool down the hot air diffused from the injection molding machine body 1 into the barrel 2. Try to prevent the plastic particles from melting in the barrel 2, sticking to each other to form blocks, and blocking the discharge port of the barrel 2. The driving member 24 drives the stirring shaft 22 to rotate with the stirring blades 23 to stir the plastic particles in the barrel 2, reducing the possibility of the plastic particles melting and sticking due to accumulation in the barrel 2. At the same time, the cold air blown out from the air inlet pipe 5 and the ventilation pipe 53 can diffuse among the plastic particles. The air flow in the barrel 2 is discharged from the barrel 2 through the heat dissipation holes 21 formed in the barrel 2, accelerating the efficiency of reducing the temperature in the barrel 2. The branch air pipe 531 communicated with the ventilation pipe 53 releases cold air towards the stirring blades 23, enabling the cold air to contact the plastic particles in the barrel 2 more evenly to cool down the plastic particles, and trying to prevent the high temperature in the barrel 2 from melting the plastic particles and sticking them to each other to form blocks. The water pump 65 conveys the cooling water in the refrigeration box 4 into the condensation tank 611 of the mounting seat 6 and the communication tank 63 of the hopper 62 through the second circulation pipeline 64 to continuously cool down the mounting seat 6 and the hopper 62, and try to prevent the plastic particles from melting at the position of the hopper 62. Try to prevent the plastic particles from melting in the barrel 2, sticking to each other to form blocks, and blocking the discharge port of the barrel 2, so that the plastic particles can smoothly enter the injection molding machine body 1, melt and then be injected into the mold, improving the working efficiency of the injection molding machine.

[0038] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Cooling device for the barrel of a composite material forming injection molding machine, comprising an injection molding machine body (1) and a barrel (2) connected to the injection molding machine body (1), characterized in that: A cooling circuit (3) is provided outside the barrel (2). There is a refrigeration box (4) connected to the cooling circuit (3) on one side of the injection molding machine body (1). An air inlet pipe (5) is provided outside the barrel (2) and is arranged in an alternating manner with the cooling circuit (3). The pipe orifice of the air inlet pipe (5) penetrates the inner side wall of the barrel (2) and communicates with the inside of the barrel (2). A blower (51) connected to the air inlet pipe (5) is provided on one side of the injection molding machine body (1); A mounting seat (6) is provided at the connection between the barrel (2) and the injection molding machine body (1), and a cooling circuit (61) is arranged in the mounting seat (6).

2. The cooling device for the barrel of the composite material forming injection molding machine according to claim 1, wherein: The cooling circuit (3) includes a cooling box (31) arranged outside the barrel (2) and a first circulation pipeline (32) communicating with the cooling box (31). The first circulation pipeline (32) is connected to the refrigeration box (4). A first delivery pump (33) connected to the first circulation pipeline (32) is provided outside the refrigeration box (4). The cooling box (31) is arranged to wrap the circumferential side wall of the barrel (2), and the air inlet pipe (5) is arranged to penetrate the cooling box (31) along the side wall of the barrel (2).

3. The cooling device for the barrel of a composite material molding injection machine according to claim 2, wherein: A connecting pipe (52) is connected to the part of the air inlet pipe (5) located in the cooling box (31). The connecting pipe (52) is arranged to surround the circumferential side wall of the material box for several turns, and a certain interval is maintained between the connecting pipes (52).

4. The cooling device for the barrel of the composite material forming injection molding machine according to claim 3, wherein: A stirring shaft (22) is rotatably arranged in the barrel (2) along its axial direction. A number of stirring blades (23) are arranged on the side wall of the stirring shaft (22). A first driving member (24) for driving the stirring shaft (22) to rotate is provided outside the barrel (2). The pipe orifice of the air inlet pipe (5) located in the barrel (2) is connected to a ventilation pipe (53), and the ventilation pipe (53) is arranged in the axial direction of the stirring shaft (22).

5. The cooling device for the barrel of the composite material forming injection molding machine according to claim 4, characterized in that: Triangular brackets (25) are fixedly connected to both ends of the barrel (2) where the stirring shaft (22) is located. The stirring shaft (22) is rotatably connected to the triangular brackets (25). A communication hole (221) is opened at one end of the stirring shaft (22) away from the first driving member (24). A rotary joint (26) is threadedly connected to the stirring shaft (22) at the position of the connection hole. The end of the rotary joint (26) away from the stirring shaft (22) is connected to the air inlet pipe (5), and the position of the communication hole (221) on the side wall of the stirring shaft (22) is connected to the ventilation pipe (53).

6. The cooling device for the barrel of the composite material forming injection molding machine according to claim 5, wherein: The ventilation pipe (53) is provided with branch air pipes (531) in the direction of the stirring blades (23) at positions corresponding to the stirring blades (23). A blocking net (532) for blocking the entry of plastic particles is provided at the pipe orifice of the branch air pipes (531).

7. The cooling device for the barrel (2) of a composite material injection molding machine according to claim 6, characterized in that: A first clamping ring (231) for fixing the branch air pipe (531) is arranged on one side of the stirring blade (23) close to the branch air pipe (531). A second clamping ring (222) for fixing the ventilation pipe (53) is arranged outside the stirring shaft (22).

8. The cooling device for the barrel of the composite material forming injection molding machine according to claim 7, wherein: A hopper (62) connected to the barrel (2) is provided in the mounting base (6). The discharge port of the hopper (62) communicates with the injection molding machine body (1). A communication groove (63) corresponding to the cooling circuit (61) is formed in the side wall of the hopper (62). An anti-sticking coating (27) is provided on the inner side wall of the barrel (2), and the anti-sticking coating (27) extends towards the inner side wall of the hopper (62).

9. The cooling device for the barrel of the composite material forming injection molding machine according to claim 8, characterized in that: The cooling circuit (61) includes a condensation tank (611) filled with coolant formed in the mounting base (6). The condensation tank (611) communicates with the communication groove (63). A second circulation pipeline (64) communicating with the condensation tank (611) is penetrated through the outside of the mounting base (6). The second circulation pipeline (64) is communicated with the refrigeration box (4), and a second delivery pump (65) communicated with the second circulation pipeline (64) is provided on the outside of the refrigeration box (4).

10. The cooling device for the barrel of the composite material forming injection molding machine according to claim 9, characterized in that: A heat insulation cushion layer (7) is provided between the mounting base (6) and the injection molding machine body (1); a filter box (54) is communicated between the air inlet pipe (5) and the fan (51).

Images