Meal box injection molding machine forming device capable of rapidly cooling

Abstract

The invention provides a fast-cooling lunch box injection molding machine forming device, and relates to the technical field of injection molding machining.The fast-cooling lunch box injection molding machine forming device comprises a machine body, a first mold is installed on the surface of the machine body, a second mold is installed on the outer side of the first mold, a mold cavity is formed in the surface, facing the first mold, of the second mold, and a convex column is arranged in the mold cavity; a cavity is formed in the second mold, a push-out assembly is installed in the cavity of the second mold, the push-out assembly comprises discs, the discs are arranged at the positions, corresponding to the mold cavities, in the second mold, mounting plates are rotationally installed on the back faces of the two discs through bearings, and penetrating-out plates are fixed to the tops of the mounting plates; through cooperation of the taking-out assembly and the pushing-out assembly, the lunch box subjected to injection molding is sucked out from the outer side and pushed out from the inner side, the demolding efficiency of the lunch box is improved, in the inner side pushing-out process, rotary air blowing heat dissipation is conducted on the interior of the lunch box, the heat dissipation efficiency is improved, and the contact uniformity of cold air and the lunch box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a lunch box injection molding device capable of rapid cooling. Background Art

[0002] An injection mold is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise dimensions. The heated and molten material is injected into a mold cavity (14) by high pressure, and after cooling and solidification, a molded product is obtained. The production equipment of the lunch box includes an injection molding machine. The injection molding machine is the main molding equipment for using a plastic molding mold to make plastic products of various shapes from thermoplastic plastics or thermosetting plastics. The working process of the injection molding machine mainly includes six stages: mold closing - filling - pressure holding - cooling - mold opening - demoulding. The molding cycle of injection molding consists of mold closing time, filling time, pressure holding time, cooling time and demoulding time, among which the cooling time accounts for the largest proportion. Generally, the molded lunch box is naturally cooled after coming out of the mold. This cooling method has a long cooling time and poor cooling effect, which affects the manufacturing efficiency of the lunch box.

[0003] Current injection molding machines have built-in water cooling systems that can efficiently dissipate heat for injection molded items. However, for cylindrical products with grooves inside, such as lunch boxes, heat is easily dissipated from the outside, while the temperature reduction efficiency of the internal grooves is low, making it impossible to quickly dissipate heat from the inner wall of the lunch box. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a lunch box injection molding machine that can quickly cool down to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Through the cooperation of a removal component and a push-out component, the lunch box that has been injection molded is sucked out from the outside and pushed out from the inside, respectively, thereby improving the demolding efficiency of the lunch box. In addition, during the pushing process from the inside, the interior of the lunch box is subjected to rotary blowing to dissipate heat, thereby improving the heat dissipation efficiency and the uniformity of contact between the cold air and the lunch box.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a fast-cooling lunch box injection molding machine forming device, comprising a machine body, a first mold is installed on the surface of the machine body, and a second mold is installed on the outside of the first mold, a mold cavity is opened on the surface of the second mold facing the first mold, and a convex column is arranged in the mold cavity, a cavity is arranged inside the second mold, and an ejection assembly is installed in the cavity of the second mold, the ejection assembly comprises a disc, a disc is arranged at a position corresponding to each cavity inside the second mold, a mounting plate is rotatably mounted on the back of the two discs through bearings, and the mounting plate A penetration plate is fixed on the top of the plate, a moving opening is provided at the top of the second mold corresponding to the position where the penetration plate penetrates, a removal component is provided on the top of the second mold, the removal component includes a mounting frame, the mounting frame is located at the top of the second mold, and a vertical plate is installed at the bottom of the mounting frame, electric suction cups are installed at the positions of the vertical plates corresponding to the two mold cavities, and the penetration plate is transmission-connected to the vertical plates, four groups of ejection plates are equidistantly provided on the innermost surface of the mold cavity, a connecting rod is rotatably installed on the surface of the disc through a bearing, and the other end of the connecting rod is rotationally connected to the back side of the ejection plate through a bearing, and two air holes are provided on the front side of the ejection plate.

[0006] Furthermore, the removal assembly also includes a first electric push rod, and the body is located on the back side of the second mold and has two groups of first electric push rods fixed thereon, and the extended end of the first electric push rod is fixedly connected to the mounting frame, a screw is rotatably installed inside the mounting frame through a bearing, and a motor for driving the screw to rotate is installed on the outside of the mounting frame, and the vertical plate is threadedly sleeved on the surface of the screw.

[0007] Furthermore, a long board is fixed at the position of the vertical board located at the top of the passing board, and a small electric push rod is provided at the top of the long board located at the top of the passing board, and the extended end of the small electric push rod inside the long board can be inserted into the top of the passing board.

[0008] Furthermore, the ejection assembly also includes a second transmission belt, and a second transmission belt is installed on the surface of the mounting plate at positions corresponding to the centers of the two discs, and two pulleys of the second transmission belt are fixedly connected to the discs. A shaft rod is provided on one side of the disc at the upper end of the second mold, and the shaft rod is rotatably installed inside the second mold through a bearing, and a second gear is slidably sleeved on the shaft rod, and a first gear is fixed to the outer ring of the disc, and the first gear is meshingly connected to the second gear.

[0009] Furthermore, the second gear is rotatably connected to the mounting plate through a bearing frame, convex strips are symmetrically arranged on the surface of the shaft rod, and the second gear is slidably engaged on the convex strips, one end of the shaft rod passes through the back side of the second mold and is plugged with an insert rod, a third bevel gear is fixed to the outer end of the insert rod, and the outer end of the insert rod is rotatably mounted on the machine body through a bearing seat.

[0010] Furthermore, a telescopic rod is rotatably mounted at a position corresponding to the third bevel gear on the top of the body through a bearing, and second bevel gears are fixed to the top and bottom of the telescopic rod. The second bevel gear at the bottom of the telescopic rod is meshed and connected with the third bevel gear.

[0011] Furthermore, a first transmission belt is sleeved on one end of the screw rod, a first bevel gear is fixed to a pulley at the other end of the first transmission belt, and the first transmission belt is installed on the side of the mounting frame, a cross plate is fixed between the first transmission belt and the mounting frame, and the first bevel gear is meshed and connected with the second bevel gear at the top of the telescopic rod.

[0012] Furthermore, springs are fixed at equal intervals on the back side of the mounting plate, and the other end of the spring is fixedly connected to the inner wall of the second mold.

[0013] Furthermore, a collecting disk is fixed at the center of the circular disk, a branch pipe is connected to the back of the air hole of the ejection plate, and the other end of the branch pipe is connected to the collecting disk.

[0014] Furthermore, a cold air box is installed on the back of the machine body located at the second mold, and a ventilation pipe is installed at the outlet end of the cold air box, and the ventilation pipe is a corrugated pipe. The other end of the ventilation pipe passes through the mounting plate, the second transmission belt and the disc and is connected to the summary disc.

[0015] Beneficial effects of the present invention:

[0016] 1. The cold air box of the present invention delivers cold air to the collecting plate through a ventilation pipe, and then sends the cold air out from the air holes through a plurality of branch pipes. Because the lunch box is in a demoulding state at this time, there is a certain gap between the lunch box and the boss, which can provide gas circulation and facilitate heat dissipation. During the movement of the lower mold and the disc, the branch pipe and the cold air box are connected through a ventilation pipe in the form of a bellows.

[0017] 2. In the present invention, when the screw rotates, the first bevel gear rotates synchronously through the transmission of the first transmission belt and meshes with the second bevel gear at the top of the telescopic rod. The telescopic rod and the second bevel gear at the lower end rotate synchronously and mesh with the third bevel gear, driving the shaft to rotate, so that the first gear meshes with the second gear. The two discs rotate simultaneously through the transmission of the second transmission belt, and the lunch box is pushed out through the connecting rod. At the same time, the air holes on the push-out plate fill the interior of the lunch box with cold air for heat dissipation.

[0018] 3. During the movement of the disc, the present invention can maintain the meshing of the first gear and the second gear, and the shaft can maintain the clamping connection with the second gear. The innermost part of the cavity was originally a rotatably installed sealing ring, and now a part of the sealing ring is replaced by four ejection plates, and the rest remains unchanged. After the ejection plate is passed through, the ejection plate can be driven to rotate by the connecting rod, and the sealing ring can be driven to rotate at the same time, thereby avoiding rotation interference.

[0019] 4. When the motor drives the screw to rotate, the vertical plate cooperates with the screw thread, and is adsorbed on the outer end of the lunch box by the suction cup and pulled outward. At the same time, the long plate drives the outlet plate to move along the moving opening, and the mounting plate inside the second mold drives the disc to move horizontally, and the lunch box is pushed out from the inside by four built-in push-out plates.

[0020] 5. Compared with the prior art, the present invention, through the cooperation of the taking-out component and the pushing-out component, can respectively suck out the injection-molded lunch box from the outside and push the lunch box out from the inside, thereby improving the demoulding efficiency of the lunch box; and during the pushing-out process from the inside, the interior of the lunch box is subjected to rotary blowing to dissipate heat, thereby improving the heat dissipation efficiency and the uniformity of the contact between the cold air and the lunch box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a fast-cooling lunch box injection molding device of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection between a take-out component and a second mold of a fast-cooling lunch box injection molding machine of the present invention;

[0023] Figure 3 This is a schematic diagram of the outer surface structure of a second mold of a fast-cooling lunch box injection molding device of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a take-out component of a fast-cooling lunch box injection molding machine of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of a second mold of a fast-cooling lunch box injection molding machine of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of an ejection component of a fast-cooling lunch box injection molding machine of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection between a disc and an ejection plate of a fast-cooling lunch box injection molding machine of the present invention;

[0028] Figure 8 The present invention is a schematic diagram of the connection of two discs of a fast-cooling lunch box injection molding machine.

[0029] In the figure: 1. body; 11. first mold; 12. second mold; 13. boss; 14. mold cavity; 2. take-out assembly; 21. first electric push rod; 22. mounting frame; 23. screw; 24. vertical plate; 25. horizontal plate; 26. first transmission belt; 27. first bevel gear; 28. telescopic rod; 29. ​​second bevel gear; 210. long plate; 3. ejection assembly; 31. outlet plate; 32. moving port; 33. disc; 34. mounting plate; 35. spring; 36. shaft; 37. plug rod; 38. third bevel gear; 39. ejection plate; 310. connecting rod; 311. air hole; 312. first gear; 313. second gear; 314. convex strip; 315. second transmission belt; 4. cold air box; 41. ventilation pipe; 42. branch pipe; 43. summary plate. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] See also Figures 1 to 8The present invention provides a technical solution: a fast-cooling lunch box injection molding device, comprising a machine body 1, a first mold 11 is installed on the surface of the machine body 1, and a second mold 12 is installed on the outside of the first mold 11, a mold cavity 14 is opened on the surface of the second mold 12 facing the first mold 11, and a convex column 13 is arranged in the mold cavity 14, a cavity is arranged inside the second mold 12, and an ejection component 3 is installed in the cavity of the second mold 12, the ejection component 3 comprises a disc 33, a disc 33 is arranged at a position corresponding to each mold cavity 14 inside the second mold 12, a mounting plate 34 is rotatably mounted on the back of the two discs 33 through bearings, a penetration plate 31 is fixed on the top of the mounting plate 34, a moving port 32 is opened at the top of the second mold 12 corresponding to the position where the penetration plate 31 penetrates, a removal component 2 is arranged on the top of the second mold 12, and the removal component 2 comprises a mounting frame 22, the mounting The frame 22 is located at the top of the second mold 12, and a vertical plate 24 is installed at the bottom of the mounting frame 22. The vertical plate 24 is installed with an electric suction cup at the position corresponding to the two mold cavities 14, and the penetration plate 31 is transmission-connected to the vertical plate 24. Four groups of ejection plates 39 are equidistantly arranged on the innermost surface of the mold cavity 14. A connecting rod 310 is rotatably installed on the surface of the disc 33 through a bearing, and the other end of the connecting rod 310 is rotationally connected to the back of the ejection plate 39 through a bearing. Two air holes 311 are provided on the front of the ejection plate 39. When the device is used, the body 1, the first mold 11 and the second mold 12 are used in coordination. This part is the technical principle of the existing injection molding machine. The injection-molded lunch box is wrapped on the convex column 13 and has been pre-cooled by the cooling system of the body 1. Then, the lunch box is pushed out of the lower mold through the coordination of the removal component 2 and the ejection component 3, and the inner wall of the lunch box is blown to dissipate heat, thereby improving the effect of cooling the interior.

[0032] In this embodiment, the taking-out component 2 also includes a first electric push rod 21, and two groups of first electric push rods 21 are fixed to the body 1 on the back side of the second mold 12, and the extended end of the first electric push rod 21 is fixedly connected to the mounting frame 22, and a screw 23 is rotatably installed inside the mounting frame 22 through a bearing, and a motor for driving the screw 23 to rotate is installed on the outside of the mounting frame 22, and the vertical plate 24 is threadedly sleeved on the surface of the screw 23. After the first electric push rod 21 absorbs and takes out the lunch box by the suction cup, the vertical plate 24 can be moved out of the body 1 together with the lunch box, so as to facilitate the removal of the lunch box.

[0033] In this embodiment, the vertical plate 24 is fixed with a long plate 210 at the position located at the top of the penetration plate 31, and the long plate 210 is provided with a small electric push rod at the top of the penetration plate 31, and the extended end of the small electric push rod inside the long plate 210 can be inserted into the top of the penetration plate 31, and the ejection assembly 3 also includes a second transmission belt 315, and a second transmission belt 315 is installed on the surface of the mounting plate 34 at the center of the two disks 33, and the two pulleys of the second transmission belt 315 are fixedly connected to the disks 33, and a shaft rod 36 is provided on one side of the upper disk 33 of the second mold 12, and the shaft rod 36 is rotatably mounted on the second mold through a bearing. Inside the tool 12, the shaft 36 is slidably sleeved with a second gear 313, the outer ring of the disc 33 is fixed with a first gear 312, the first gear 312 is meshed and connected with the second gear 313, the second gear 313 is rotatably connected with the mounting plate 34 through a bearing frame, convex strips 314 are symmetrically arranged on the surface of the shaft 36, and the second gear 313 is slidably engaged with the convex strips 314, one end of the shaft 36 passes through the back of the second mold 12 and is plugged with an insertion rod 37, the outer end of the insertion rod 37 is fixed with a third bevel gear 38, and the outer end of the insertion rod 37 is rotatably mounted on the machine body 1 through a bearing seat, the mounting Springs 35 are fixed at equal intervals on the back of the plate 34, and the other end of the spring 35 is fixedly connected to the inner wall of the second mold 12. In the delivery stage, the small electric push rod built into the long plate 210 can be inserted into the outlet plate 31, which is not shown in the figure. The cooperation with the outlet plate 31 is a common electric telescopic plug-in structure, which is vertically plugged. When the motor drives the screw 23 to rotate, the vertical plate 24 cooperates with the screw 23 thread, and is sucked on the outer end of the lunch box by the suction cup and pulled outward. At the same time, the long plate 210 drives the outlet plate 31 to move along the moving opening 32, and the mounting plate 34 inside the second mold 12 will drive the disc 33 to move horizontally, which is driven by four built-in push-out plates. 39 pushes the lunch box out from the inside. During this process, the rotatably connected connecting rod 310 can be adapted to slide on the inclined inner wall of the mold cavity 14. At the same time, due to the setting of the convex strip 314 of the shaft rod 36, the first gear 312 and the second gear 313 can be kept engaged and the shaft rod 36 can be kept engaged with the second gear 313 during the movement of the disc 33. The innermost part of the cavity was originally a rotatably installed sealing ring, which is now replaced by four ejection plates 39. The rest remains unchanged. After the ejection plate 39 is passed through, the ejection plate 39 can be driven to rotate by the connecting rod 310 while driving the sealing ring to rotate, thereby avoiding rotation interference.

[0034] In this embodiment, a telescopic rod 28 is rotatably mounted at a position corresponding to the third bevel gear 38 at the top of the body 1 through a bearing, and a second bevel gear 29 is fixed to the top and bottom of the telescopic rod 28. The second bevel gear 29 at the bottom of the telescopic rod 28 is meshed and connected with the third bevel gear 38. A first transmission belt 26 is sleeved at one end of the screw 23, and a first bevel gear 27 is fixed to a pulley at the other end of the first transmission belt 26. The first transmission belt 26 is mounted on the side of the mounting frame 22, and a horizontal plate 25 is fixed between the first transmission belt 26 and the mounting frame 22. The first bevel gear 27 is connected to the telescopic rod 28. The second bevel gear 29 at the top of the rod 28 is meshed and connected. When the screw 23 rotates, the first bevel gear 27 rotates synchronously and meshes with the second bevel gear 29 at the top of the telescopic rod 28 through the transmission of the first transmission belt 26. The telescopic rod 28 and the second bevel gear 29 at the lower end rotate synchronously and mesh with the third bevel gear 38, driving the shaft 36 to rotate, so that the first gear 312 is meshed with the second gear 313. The two discs 33 rotate at the same time through the transmission of the second transmission belt 315. When the lunch box is pushed out through the connecting rod 310, the air holes 311 on the push-out plate 39 are filled with cold air into the lunch box for heat dissipation.

[0035] In this embodiment, a collecting plate 43 is fixed at the center of the disc 33, a branch pipe 42 is connected to the back of the air hole 311 of the ejection plate 39, and the other end of the branch pipe 42 is connected to the collecting plate 43, a cold air box 4 is installed on the back of the body 1 located at the second mold 12, and a ventilation pipe 41 is installed at the outlet end of the cold air box 4, and the ventilation pipe 41 is a corrugated pipe, and the other end of the ventilation pipe 41 passes through the mounting plate 34, the second transmission belt 315 and the disc 33 and is connected to the collecting plate 43, the cold air box 4 transports cold air to the collecting plate 43 through the ventilation pipe 41, and then sends the cold air out from the air hole 311 through a plurality of branch pipes 42. Because the lunch box is in a demolding state at this time, there is a certain gap between the lunch box and the boss 13, which can provide gas circulation and facilitate heat dissipation. During the movement of the lower mold and the disc 33, the branch pipe 42 is connected to the cold air box 4 through the ventilation pipe 41 in the form of a corrugated pipe.

[0036] When the device is used, the machine body 1, the first mold 11 and the second mold 12 are used in coordination. This part is the technical principle of the existing injection molding machine. The molded lunch box is wrapped on the protruding column 13 and has been pre-cooled by the cooling system of the machine body 1. In the delivery stage, the small electric push rod built into the long plate 210 can be inserted into the outlet plate 31. The coordination with the outlet plate 31 is a common electric telescopic plug-in structure, which is vertically plugged. When the motor drives the screw 23 to rotate, the vertical plate 24 is threadedly matched with the screw 23. The suction cup is attached to the outer end of the lunch box and pulled outward, while the long plate 210 drives the outlet plate 31 to move along the moving opening 32, and the mounting plate 34 inside the second mold 12 drives the disc 33 to move horizontally, and the lunch box is pushed out from the inside by four built-in push-out plates 39. During this process, the rotatably connected connecting rod 310 can be adapted to slide on the inclined inner wall of the mold cavity 14. At the same time, due to the setting of the convex strip 314 of the shaft rod 36, the first gear 312 and the second gear 313 can be kept in meshing during the movement of the disc 33 to The shaft 36 can maintain the clamping connection with the second gear 313. When the screw 23 rotates, the first bevel gear 27 rotates synchronously with the second bevel gear 29 at the top of the telescopic rod 28 through the transmission of the first transmission belt 26, and the telescopic rod 28 rotates synchronously with the second bevel gear 29 at the lower end and meshes with the third bevel gear 38, driving the shaft 36 to rotate, so that the first gear 312 is meshed with the second gear 313. The two discs 33 rotate at the same time through the transmission of the second transmission belt 315, and the lunch box is pushed into the container through the connecting rod 310. At the same time, the air holes 311 on the ejection plate 39 fill the lunch box with cold air for heat dissipation, the cold air box 4 transports the cold air to the collecting plate 43 through the ventilation pipe 41, and then the cold air is sent out from the air holes 311 through multiple branch pipes 42. Because the lunch box is in a demoulding state at this time, there is a certain gap between the lunch box and the boss 13, which can provide gas circulation and facilitate heat dissipation. During the movement of the lower mold and the disc 33, the ventilation pipe 41 in the form of a bellows is used to maintain the connection between the branch pipe 42 and the cold air box 4.

[0037] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fast-cooling lunch box injection molding machine, comprising a machine body (1), characterized in that: A first mold (11) is installed on the surface of the machine body (1), and a second mold (12) is installed on the outside of the first mold (11); a mold cavity (14) is opened on the surface of the second mold (12) facing the first mold (11), and a convex column (13) is arranged in the mold cavity (14); a cavity is arranged inside the second mold (12), and an ejection assembly (3) is installed in the cavity of the second mold (12); the ejection assembly (3) comprises a disc (33); a disc (33) is arranged inside the second mold (12) at a position corresponding to each mold cavity (14); a mounting plate (34) is rotatably mounted on the back of the two discs (33) via bearings; a penetration plate (31) is fixed on the top of the mounting plate (34); the top of the second mold (12) corresponds to the penetration plate (31). 1) A moving opening (32) is provided at the position of the outlet, a taking-out assembly (2) is provided at the top of the second mold (12), the taking-out assembly (2) comprises a mounting frame (22), the mounting frame (22) is located at the top of the second mold (12), and a vertical plate (24) is installed at the bottom of the mounting frame (22), electric suction cups are installed at the positions of the vertical plates (24) corresponding to the two mold cavities (14), and the outlet plate (31) is transmission-connected to the vertical plates (24), four groups of ejection plates (39) are equidistantly provided on the innermost surface of the mold cavity (14), a connecting rod (310) is rotatably installed on the surface of the disc (33) through a bearing, and the other end of the connecting rod (310) is rotationally connected to the back of the ejection plate (39) through a bearing, and two air holes (311) are provided on the front of the ejection plate (39).

2. The fast cooling lunch box injection molding device according to claim 1, characterized in that: The removal assembly (2) further comprises a first electric push rod (21), the machine body (1) being located on the back side of the second mould (12) and having two groups of first electric push rods (21) fixed thereto, and the extended ends of the first electric push rods (21) being fixedly connected to the mounting frame (22), a screw rod (23) being rotatably mounted inside the mounting frame (22) via a bearing, and a motor for driving the screw rod (23) to rotate is mounted on the outside of the mounting frame (22), and the vertical plate (24) is threadedly sleeved on the surface of the screw rod (23).

3. The fast cooling lunch box injection molding device according to claim 2, characterized in that: A long plate (210) is fixed to the position of the vertical plate (24) located at the top of the outlet plate (31), and a small electric push rod is arranged on the long plate (210) located at the top of the outlet plate (31), and the extended end of the small electric push rod inside the long plate (210) can be inserted into the top of the outlet plate (31).

4. The fast cooling lunch box injection molding device according to claim 3, characterized in that: The ejection assembly (3) further comprises a second transmission belt (315), and the second transmission belt (315) is installed on the surface of the mounting plate (34) at positions corresponding to the centers of the two disks (33), and the two pulleys of the second transmission belt (315) are fixedly connected to the disks (33). A shaft (36) is provided on one side of the disk (33) at the upper end of the second mold (12), and the shaft (36) is rotatably installed inside the second mold (12) through a bearing, and a second gear (313) is slidably sleeved on the shaft (36), and a first gear (312) is fixed to the outer ring of the disk (33), and the first gear (312) is meshingly connected with the second gear (313).

5. The fast cooling lunch box injection molding device according to claim 4, characterized in that: The second gear (313) is rotatably connected to the mounting plate (34) via a bearing frame; convex strips (314) are symmetrically arranged on the surface of the shaft rod (36), and the second gear (313) is slidably engaged with the convex strips (314); one end of the shaft rod (36) passes through the back side of the second mold (12) and is plugged with an insertion rod (37); a third bevel gear (38) is fixed to the outer end of the insertion rod (37), and the outer end of the insertion rod (37) is rotatably mounted on the machine body (1) via a bearing seat.

6. The fast cooling lunch box injection molding device according to claim 5, characterized in that: A telescopic rod (28) is rotatably mounted at a position corresponding to the third bevel gear (38) on the top of the machine body (1) via a bearing, and second bevel gears (29) are fixed to the top and bottom of the telescopic rod (28), and the second bevel gear (29) at the bottom of the telescopic rod (28) is meshedly connected with the third bevel gear (38).

7. The fast cooling lunch box injection molding device according to claim 6, characterized in that: One end of the screw rod (23) is sleeved with a first transmission belt (26), a pulley at the other end of the first transmission belt (26) is fixed with a first bevel gear (27), and the first transmission belt (26) is installed on the side of the mounting frame (22), a transverse plate (25) is fixed between the first transmission belt (26) and the mounting frame (22), and the first bevel gear (27) is meshedly connected with a second bevel gear (29) at the top of the telescopic rod (28).

8. The fast cooling lunch box injection molding device according to claim 7, characterized in that: Springs (35) are fixed at equal distances on the back of the mounting plate (34), and the other end of the spring (35) is fixedly connected to the inner wall of the second mold (12).

9. The fast cooling lunch box injection molding device according to claim 8, characterized in that: A collecting disk (43) is fixed at the center of the circular disk (33), a branch pipe (42) is connected to the back of the air hole (311) of the ejection plate (39), and the other end of the branch pipe (42) is connected to the collecting disk (43).

10. The fast cooling lunch box injection molding device according to claim 9, characterized in that: The machine body (1) is provided with a cold air box (4) on the back side of the second mould (12), and a ventilation pipe (41) is provided at the outlet end of the cold air box (4), and the ventilation pipe (41) is a corrugated pipe, and the other end of the ventilation pipe (41) passes through the mounting plate (34), the second transmission belt (315) and the disc (33) to be connected with the collecting disc (43).

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