An injection molding machine cooling system

Abstract

The present invention discloses an injection molding machine cooling system, which relates to the technical field of injection molding machines and aims to solve the technical problem of poor cooling effect of injection molds and plastic bowls. It includes a chassis, an injection mechanism, a mold clamping mechanism, a fixed mold, a movable mold, and a cooling unit for the movable mold. The present invention cools the bowl cavity in the form of a cooling cavity to ensure the uniformity of cooling the injection molded bowl during injection molding, and solves the technical problem of poor cooling effect of injection molds and plastic bowls. The bowl body cooling cavity is used to cool the bowl body part of the bowl cavity and forms a circulating cooling structure with flow channel A and flow channel B. The cooling water in the cooling bowl cavity rotates and is replaced to take away the heat generated by injection molding. The cooling ring cavity is used to cool the bottoms of the four bowl cavities and forms a circulating cooling structure with two flow channels C. The cooling liquid in the cooling ring cavity is replaced, and the replacement efficiency is higher, thereby increasing the cooling speed of the bowl cavity bottom and making the cooling time of the bowl body and the bowl bottom of the injection molded bowl close or even the same.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, and more specifically, to a cooling system for an injection molding machine. Background Art

[0002] An injection molding machine is an automated device that heats and melts plastic particles and then injects them into a mold cavity under high pressure to form plastic products after cooling and shaping. It is widely used in fields such as daily necessities, electronic components, and medical devices. Its core processes include plasticization, injection, pressure holding, cooling, and demolding. Among them, the cooling link has a decisive impact on the molding efficiency and product quality. As a thin-walled product, a plastic bowl has extremely high requirements for cooling uniformity. A plastic bowl injection molding machine usually achieves rapid shaping by cooling the mold.

[0003] Disposable bowls are usually produced by injection molding machines. In order to improve the user experience and safety, the bottom of a disposable bowl is usually thicker than other positions, so that the bottom can better bear the weight of the food in the bowl, prevent deformation or tipping, and contribute to a more stable overall structure.

[0004] Existing plastic bowl injection molding machines usually open water channels in the mold and introduce circulating cooling water. In this cooling method, the distances between the water channels and the surface of the mold cavity are inconsistent, resulting in uneven cooling and poor cooling effect. This causes temperature differences in the mold cavity. When the mold is closed for cooling, the shrinkage rates of different regions of the plastic bowl are likely to be different, resulting in surface shrinkage marks in the under-cooled regions. In particular, the bottom of the bowl is prone to depression, resulting in a high defective product rate. In view of this, we propose a cooling system for an injection molding machine. Summary of the Invention

[0005] The purpose of the present invention is to provide a cooling system for an injection molding machine to solve the technical problem of poor cooling effect of the injection mold and the plastic bowl.

[0006] To solve the above technical problem, the present invention provides the following technical solution: A cooling system for an injection molding machine, including a machine case. An empty slot is opened on one side of the top of the machine case. An injection mechanism is fixedly arranged on the other side of the machine case. A mold clamping mechanism is fixedly arranged at a position opposite to the empty slot on the top of the machine case. A fixed mold is arranged at the fixed end of the mold clamping mechanism, and a movable mold is arranged at the movable end of the mold clamping mechanism. A cooling unit for cooling the fixed mold and the movable mold is fixedly arranged inside the machine case;

[0007] One end of the fixed mold away from the injection mechanism is evenly provided with four bowl cavities. Four bowl body cooling cavities for cooling the peripheral side of the bowl body of the bowl cavity are arranged in the fixed mold. Three flow grooves A are arranged in the fixed mold. The three flow grooves A are arranged in a U-shaped structure with the opening facing downwards. The two ends of the flow groove A are respectively communicated with the outer quadrant points of the bowl body parts of the corresponding two bowl cavities. Two flow grooves B are arranged at the bottom end of the fixed mold. The two flow grooves B are arranged in a figure-eight structure. The top ends of the two flow grooves B are respectively communicated with the bottom quadrant points of the bowl body parts of the two bowl cavities located at the bottom end. A cooling ring cavity is arranged in the fixed mold at positions corresponding to the bottoms of the four bowl cavities. Two flow grooves C arranged in a figure-eight structure are arranged at the bottom end of the fixed mold. The top ends of the flow grooves C are both communicated with the cooling ring cavity. The present invention cools the bowl cavity in the form of a cooling cavity, ensuring the uniformity of the cooling of the injection-molded bowl during injection cooling, and solving the technical problem of poor cooling effect of the injection mold and the plastic bowl. Among them, the bowl body cooling cavity is used to cool the bowl body part of the bowl cavity, and forms a circulating cooling structure with the flow groove A and the flow groove B. During cooling, the cooling water in the cooling bowl cavity rotates and can be replaced to take away the heat generated by injection molding. The cooling ring cavity is used to cool the bottoms of the four bowl cavities and forms a circulating cooling structure with the two flow grooves C. The cooling liquid in the cooling ring cavity is replaced, and the replacement efficiency is higher, thereby increasing the cooling speed of the bottom of the bowl cavity, making the cooling time of the bowl body and the bowl bottom of the injection-molded bowl close or even the same, and thus improving the production efficiency of the injection-molded bowl.

[0008] Preferably, both the flow groove A and the flow groove B are adapted to the shape of the bowl body part of the bowl cavity, and the flow groove A is communicated with the flow groove B.

[0009] Preferably, a plurality of movable ring grooves are arranged on the cooling ring cavity in an inner and outer structure, and a plurality of flow disturbance balls are movably arranged on the movable ring grooves.

[0010] Preferably, the cooling ring cavity includes a circular cavity for cooling the bottom part of the bowl cavity of the bowl cavity. A foot ring cooling cavity for cooling the foot ring part of the bowl cavity is communicated with the outer peripheral side of the circular cavity. The foot ring cooling cavity is adapted to the foot ring part of the bowl cavity. Any adjacent two circular cavity gaps are communicated through an arc cavity.

[0011] Preferably, two through pipes are fixedly arranged at the bottom end of the fixed mold. A flow guiding block is fixedly arranged in the through pipes. The inner surface of the through pipes and the two ends of the flow guiding block respectively form a flow guiding groove A adapted to the flow groove B and a flow guiding groove B adapted to the flow groove C.

[0012] Preferably, the fixed mold and the fixed end of the mold clamping mechanism are fixedly connected through a heat insulation plate A. An injection main pipe is arranged on one side of the heat insulation plate A close to the injection mechanism. The injection main pipe is communicated with the output end of the injection mechanism. Four injection branch pipes are communicated at one end of the injection main pipe far from the injection mechanism. One end of the injection branch pipe far from the injection mechanism sequentially penetrates through the fixed mold and the cooling ring cavity and is communicated with the bowl cavity.

[0013] Preferably, a heat insulation plate B is fixedly arranged at one end of the movable mold far from the injection mechanism. The heat insulation plate B is fixedly connected with the movable end of the mold clamping mechanism. Four convex blocks are fixedly arranged at one end of the movable mold close to the injection mechanism. A first water cavity is formed inside the convex block in a hollow manner. A second water cavity communicated with the first water cavity is arranged in the movable mold. The second water cavity is in a frustum structure. A fixing groove is arranged at one end of the second water cavity far from the first water cavity. A flow dividing column is fixedly arranged on the fixing groove. One end of the flow dividing column close to the first water cavity penetrates through the second water cavity and extends into the first water cavity. The flow dividing column is adapted to the shape of the first water cavity. A cooling water cavity is formed by the gap between the flow dividing column and the first water cavity. A return cavity is formed by the gap between the flow dividing column and the second water cavity. An input hole groove is arranged in the flow dividing column. Input channels are arranged at the bottom end of the movable mold corresponding to the positions of the four input hole grooves. The input channels are all communicated with the four input hole grooves through branch channels A. An input pipe communicated with the input channels is fixedly arranged at the bottom end of the movable mold. Output channels are arranged at the bottom end of the movable mold corresponding to the positions of the four second water cavities. The output channels are all communicated with the four second water cavities through branch channels B. An output pipe communicated with the output channels is fixedly arranged at the bottom end of the movable mold.

[0014] Preferably, a rotating groove is arranged at one end of the flow dividing column close to the first water cavity. An adapting ring block is rotatably arranged on the rotating groove. A plurality of partially spiral guide plates are fixedly arranged on the adapting ring block in an annular equidistant structure.

[0015] Preferably, a flaring groove is arranged at one end of the input hole groove close to the first water cavity. A plurality of flow disturbing grooves are arranged on the input hole groove in an annular equidistant structure. A plurality of guide arc plates are fixedly arranged in the input hole groove corresponding to the positions of the plurality of flow disturbing grooves;

[0016] Among them, the number of the plurality of flow disturbing grooves is odd.

[0017] Preferably, a first water pump and a second water pump are respectively and communicatively provided at two ends of the water tank of the cooling unit. The bottom end of one of the through pipes is communicatively connected to the output end of the first water pump through Pipeline Unit A, and the bottom end of the other through pipe is communicatively connected to the water tank of the cooling unit through Pipeline Unit B. The bottom end of the input pipe is communicatively connected to the output end of the second water pump through Hose A, and the bottom end of the output pipe is communicatively connected to the water tank of the cooling unit through Hose B. Both Hose A and Hose B are in a spiral shape.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention cools the bowl cavity in the form of a cooling cavity to ensure the uniformity of the cooling of the injection-molded bowl during injection cooling, and solves the technical problem of poor cooling effect of the injection mold and the plastic bowl. Among them, the bowl body cooling cavity is used to cool the bowl body part of the bowl cavity, and forms a circulating cooling structure with Flow Channel A and Flow Channel B. During cooling, the cooling water in the cooling bowl cavity rotates and can be replaced to take away the heat generated by injection molding. The cooling ring cavity is used to cool the bottoms of the four bowl cavities and forms a circulating cooling structure with the two Flow Channels C. The cooling liquid in the cooling ring cavity is replaced, and the replacement efficiency is higher, thereby increasing the cooling speed of the bottom of the bowl cavity, making the cooling time of the bowl body and the bowl bottom of the injection-molded bowl close or even the same, thus improving the production efficiency of the injection-molded bowl.

[0020] 2. Through the setting of the turbulence balls in the present invention, the turbulence balls can rotate with the flow of the cooling water in the cooling ring cavity. The addition of the turbulence balls increases the rotational inertia of the cooling water in the cooling ring cavity, and the turbulence balls move in the water flow, changing the water flow from laminar flow to turbulent flow, destroying the thermal boundary layer between the cooling water and the wall of the cooling ring cavity, enhancing the disturbance of the cooling water, and improving the heat exchange efficiency, thereby enhancing the overall cooling effect.

[0021] 3. Through the structural design of the moving mold in the present invention, when the mold is closed, the convex block and the bowl cavity form an injection cavity. The cooling water cavity is used to cool the inner surface of the injection-molded bowl. The cooling water enters the input flow channel from the input pipe and sequentially passes through the four branch channels A, the four input hole grooves and enters the four cooling water cavities to cool the inner surfaces of the four injection-molded bowls, and then sequentially passes through the four return cavities and the four branch channels B and flows into the output flow channel, and is output from the output pipe, realizing the cooling of the inner surface of the injection-molded bowl, and further improving the cooling effect of the injection mold and the plastic bowl.

[0022] 4. The present invention further designs the diverter column so that when the cooling water enters the reflux chamber, the guide plate drives the adaptable ring block to rotate, thereby rotating the cooling water in the cooling water chamber and the reflux chamber. The rotation of the cooling water in the cooling water chamber makes the inner surface of the injection bowl cooler more evenly. The adaptable ring block is truncated cone-shaped. The centrifugal force generated by the rotation of the cooling water helps the cooling water in the cooling water chamber to enter the reflux chamber. The rotation of the cooling water in the cooling water chamber and the reflux chamber helps the cooling water in the cooling water chamber and the reflux chamber to circulate and replace, and facilitates the cooling water in the reflux chamber to enter the branch channel B for rotation, thereby improving the heat dissipation effect.

[0023] 5. The present invention further designs the input hole groove so that when water flows into the input hole groove, part of the water flows along the guide arc plate into the spoiler groove, thereby reducing the impact force between the cooling water and the first water cavity, and the cooling water reconverges with the cooling water in the input hole groove through the spoiler groove for turbulence, so that the cooling water is dispersed in the cooling water cavity for the first time. If the number of interference flow grooves is an odd number, it is designed to prevent the cooling water passing through the spoiler groove from affecting each other and affecting the turbulence effect, thereby reducing the direct impact force between the cooling water and the first water cavity, thereby improving the service life of the movable mold, reducing the heat generated by the impact of the cooling water, reducing energy loss and improving the cooling effect.

[0024] 6. The present invention arranges the hose A and the hose B to be threaded, so that when the hose A and the hose B are extended or retracted, they adapt to the movement mainly through the elastic deformation of the spiral structure, while the effective length of the internal water channel remains unchanged, thereby maintaining a stable water flow speed and pressure. The spiral structure has high elastic deformation ability, can adapt to the high-frequency movement of the mold opening and closing, reduce mechanical stress concentration, and the ribbed structure still maintains a smooth inner wall transition when extended or retracted, avoiding sharp bends or folding, reducing pressure loss, protecting the cooling system, and extending the life of the water pump and pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the fixed mold, movable mold and cooling unit of the present invention.

[0028] Figure 4 It is a schematic structural diagram of the cooling unit of the present invention.

[0029] Figure 5 It is a schematic diagram of the fixed mold and movable mold structure of the present invention.

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the fixed mold and the movable mold of the present invention.

[0031] Figure 7 is Figure 6 a schematic enlarged view of the local structure of

[0032] Figure 8 a schematic view of the split structure of the fixed mold of the present invention.

[0033] Figure 9 a schematic sectional view of the fixed mold of the present invention showing the cooling water flow direction of the bowl body cooling cavity.

[0034] Figure 10 a schematic sectional view of the fixed mold of the present invention showing the cooling water flow direction of the cooling ring cavity.

[0035] Figure 11 a schematic view of the split structure of the through pipe of the present invention.

[0036] Figure 12 a schematic view of the split structure of the moving mold of the present invention.

[0037] Figure 13 a schematic view of the split structure of the flow dividing column of the present invention.

[0038] Figure 14 a schematic sectional view of the flow dividing column of the present invention showing the cooling water flow direction of the input hole groove.

[0039] Figure 15 a schematic view of the structure of the mold closing mechanism, fixed mold and moving mold of the present invention.

[0040] Explanation of the reference numerals in the figure:

[0041] 1. Chassis; 2. Injection mechanism; 3. Mold closing mechanism; 4. Fixed mold; 5. Moving mold; 6. Cooling unit;

[0042] 11. Empty groove;

[0043] 40. Heat insulation plate A; 41. Bowl cavity; 42. Bowl body cooling cavity; 43. Flow groove A; 44. Flow groove B; 45. Cooling ring cavity; 46. Flow groove C; 47. Through pipe; 48. Injection main pipe; 49. Injection branch pipe;

[0044] 451. Movable ring groove; 452. Turbulence ball; 453. Circular cavity; 454. Foot ring cooling cavity; 455. Arc cavity;

[0045] 471. Flow guiding block;

[0046] 50. Heat insulation plate B; 51. Protrusion; 52. First water cavity; 53. Second water cavity; 54. Fixed groove; 55. Flow dividing column; 56. Input hole groove; 57. Input flow channel; 58. Branch flow channel A; 59. Input pipe; 510. Output flow channel;

[0047] 511. Branch channel B; 512. Output pipe

[0048] 551. Rotating groove; 552. Adaptation ring block; 553. Deflector

[0049] 561. Flaring groove; 562. Turbulence groove; 563. Deflecting arc plate

[0050] 61. First water pump; 62. Second water pump; 63. Pipeline unit A; 64. Pipeline unit B; 65. Hose A; 66. Hose B Detailed implementation mode

[0051] As Figures 1 to 15 shown, an injection molding machine cooling system related to the present invention includes a chassis 1, an injection mechanism 2, a mold clamping mechanism 3, a fixed mold 4, a movable mold 5, and a cooling unit 6

[0052] An empty slot 11 is opened on one side of the top end of the chassis 1

[0053] The injection mechanism 2 is fixedly arranged on the other side of the chassis 1; the injection mechanism 2 is used for melting, mixing and injecting plastic particles, which is prior art and will not be elaborated here

[0054] The mold clamping mechanism 3 is fixedly arranged on the top end of the chassis 1 relative to the position of the empty slot 11. As Figure 14 shown, it includes an oil cylinder, a fixed template for connecting the fixed mold 4, a movable template for connecting the movable mold 5, and a toggle component for amplifying the thrust of the oil cylinder through a mechanical link structure. The fixed template is marked with the fixed end of the mold clamping mechanism 3, the movable template is marked with the movable end of the mold clamping mechanism 3, and the toggle component has a speed-up effect

[0055] The fixed mold 4 is arranged at the fixed end of the mold clamping mechanism 3. Four bowl cavities 41 are evenly opened at one end of the fixed mold 4 away from the injection mechanism 2. Four bowl body cooling cavities 42 for cooling the peripheral side of the bowl body of the bowl cavity 41 are opened in the fixed mold 4. Three flow channels A43 are opened in the fixed mold 4. The three flow channels A43 are arranged in a U-shaped structure with the opening facing downwards, and both ends of the flow channel A43 are respectively communicated with the outer quadrant points of the bowl body parts of the corresponding two bowl cavities 41. Two flow channels B44 are opened at the bottom end of the fixed mold 4. The two flow channels B44 are arranged in a figure-eight structure, and the top ends of the two flow channels B44 are respectively communicated with the bottom quadrant points of the bowl body parts of the two bowl cavities 41 located at the bottom end. A cooling ring cavity 45 is opened in the fixed mold 4 at a position opposite to the bottom of the four bowl cavities 41. Two flow channels C46 arranged in a figure-eight structure are opened at the bottom end of the fixed mold 4, and the top ends of the flow channels C46 are both communicated with the cooling ring cavity 45

[0056] Both the flow channel A43 and the flow channel B44 are adapted to the shape of the bowl body part of the bowl cavity 41, and the flow channel A43 is communicated with the flow channel B44

[0057] A plurality of movable annular grooves 451 are formed in the cooling annular cavity 45 in an inner and outer structure, and a plurality of flow disturbance balls 452 are movably arranged on the movable annular grooves 451. Through the arrangement of the flow disturbance balls 452, the flow disturbance balls 452 can rotate along with the flow of the cooling water in the cooling annular cavity 45. The addition of the flow disturbance balls 452 increases the rotational inertia of the cooling water in the cooling annular cavity 45. Moreover, as the flow disturbance balls 452 move in the water flow, the water flow changes from laminar flow to turbulent flow, destroying the thermal boundary layer between the cooling water and the wall of the cooling annular cavity 45, enhancing the disturbance of the cooling water, improving the heat exchange efficiency, and thus enhancing the overall cooling effect.

[0058] The cooling annular cavity 45 includes a circular cavity 453 for cooling the bottom part of the bowl cavity 41. A foot ring cooling cavity 454 for cooling the foot ring part of the bowl cavity 41 is communicated with the outer peripheral side of the circular cavity 453. The foot ring cooling cavity 454 is adapted to the foot ring part of the bowl cavity 41, and any two adjacent circular cavities 453 are communicated with each other through an arc cavity 455. In the present invention, the foot ring cooling cavity 454 is provided for cooling the foot ring of the bowl cavity 41 to ensure the uniformity of cooling.

[0059] Two through pipes 47 are fixedly arranged at the bottom end of the fixed mold 4. A flow guiding block 471 is fixedly arranged in the through pipe 47. The inner surface of the through pipe 47 and the two ends of the flow guiding block 471 respectively form a flow guiding groove A adapted to the flow groove B44 and a flow guiding groove B adapted to the flow groove C46. In the present invention, by arranging the flow guiding block 471 in the through pipe 47 to guide the cooling water in the through pipe 47, the heat generated by the collision of the cooling water and the fixed mold 4 is reduced, and an energy-saving effect is achieved.

[0060] The fixed mold 4 and the fixed end of the mold clamping mechanism 3 are fixedly connected through a heat insulation plate A40. An injection main pipe 48 is arranged on one side of the heat insulation plate A40 close to the injection mechanism 2. The injection main pipe 48 is communicated with the output end of the injection mechanism 2. Four injection branch pipes 49 are communicated with one end of the injection main pipe 48 far from the injection mechanism 2. The ends of the injection branch pipes 49 far from the injection mechanism 2 sequentially pass through the fixed mold 4 and the cooling annular cavity 45 and are communicated with the bowl cavity 41.

[0061] One end of the moving mold 5 away from the injection mechanism 2 is fixedly provided with a heat insulation plate B50. The heat insulation plate B50 is fixedly connected to the moving end of the mold clamping mechanism 3. One end of the moving mold 5 close to the injection mechanism 2 is fixedly provided with four bumps 51. The inside of the bumps 51 is hollow to form a first water cavity 52. A second water cavity 53 communicating with the first water cavity 52 is opened in the moving mold 5. The second water cavity 53 is in a frustum structure. A fixing groove 54 is opened at one end of the second water cavity 53 away from the first water cavity 52. A flow dividing column 55 is fixedly provided on the fixing groove 54. One end of the flow dividing column 55 close to the first water cavity 52 passes through the second water cavity 53 and extends into the first water cavity 52. The flow dividing column 55 is adapted to the shape of the first water cavity 52. The gap between the flow dividing column 55 and the first water cavity 52 forms a cooling water cavity. The gap between the flow dividing column 55 and the second water cavity 53 forms a return cavity. An input hole groove 56 is opened in the flow dividing column 55. Input channels 57 are opened at the bottom of the moving mold 5 at positions corresponding to the four input hole grooves 56. The input channels 57 are all connected to the four input hole grooves 56 through branch channels A58. An input pipe 59 connected to the input channels 57 is fixedly provided at the bottom of the moving mold 5. Output channels 510 are opened at the bottom of the moving mold 5 at positions corresponding to the four second water cavities 53. The output channels 510 are all connected to the four second water cavities 53 through branch channels B511. An output pipe 512 connected to the output channels 510 is fixedly provided at the bottom of the moving mold 5. Through the above settings of the present invention, as Figure 6 and Figure 7 shown, when the mold is clamped, the bumps 51 and the bowl cavity 41 form an injection cavity. The cooling water cavity is used for cooling the inner surface of the injection bowl. The cooling water enters the input channels 57 from the input pipe 59 and successively passes through the four branch channels A58, the four input hole grooves 56 and enters the four cooling water cavities to cool the inner surfaces of the four injection bowls, and then successively passes through the four return cavities and the four branch channels B511 and flows into the output channels 510, and is output from the output pipe 512, realizing the cooling of the inner surface of the injection bowl, and further improving the cooling effect of the injection mold and the plastic bowl.

[0062] A rotating groove 551 is opened at one end of the flow dividing column 55 close to the first water cavity 52. An adapting ring block 552 is rotatably provided on the rotating groove 551. A plurality of partially spiral guide plates 553 are fixedly provided on the adapting ring block 552 in an annular equidistant structure. Through the further design of the flow dividing column 55 of the present invention, when the cooling water enters the return cavity, the guide plates 553 will drive the adapting ring block 552 to rotate, so that the cooling water in the cooling water cavity and the return cavity rotates. The rotation of the cooling water in the cooling water cavity makes the cooling of the inner surface of the injection bowl more uniform. The adapting ring block 552 is in a frustum shape. The centrifugal force generated by the rotation of the cooling water helps the cooling water in the cooling water cavity to enter the return cavity. The rotation of the cooling water in the cooling water cavity and the return cavity helps the cooling water in the cooling water cavity and the return cavity to circulate and replace, and is convenient for the cooling water in the return cavity to enter the branch channel B511 to rotate, thereby improving the heat dissipation effect.

[0063] The input hole groove 56 is provided with a horn groove 561 near one end close to the first water cavity 52. A plurality of turbulence grooves 562 are arranged on the input hole groove 56 in an annular equidistant structure. A plurality of flow guiding arc plates 563 are fixedly arranged in the input hole groove 56 at positions corresponding to the plurality of turbulence grooves 562.

[0064] Among them, the number of the plurality of turbulence grooves 562 is odd. Through the further design of the input hole groove 56, such as Figure 15 shown in the figure, when the water flow enters the input hole groove 56, part of the water flow enters the turbulence groove 562 through the flow guiding arc plate 563, reducing the impact force between the cooling water and the first water cavity 52. And the cooling water passes through the turbulence groove 562 and converges with the cooling water in the input hole groove 56 again for turbulence, so that the cooling water is dispersed in the cooling water cavity for the first time. Designing the number of the plurality of turbulence grooves 562 to be odd can prevent the cooling water passing through the turbulence groove 562 from affecting each other and affecting the turbulence effect, reduce the direct impact force between the cooling water and the first water cavity 52, improve the service life of the moving die 5, and reduce the heat generated by the impact of the cooling water, reduce energy loss and improve the cooling effect.

[0065] The cooling unit 6 is fixedly arranged in the chassis 1. The two ends of the water tank of the cooling unit 6 are respectively communicated with a first water pump 61 and a second water pump 62. The bottom end of one of the through pipes 47 is communicated with the output end of the first water pump 61 through a pipeline unit A63, and the bottom end of the other through pipe 47 is communicated with the water tank of the cooling unit 6 through a pipeline unit B64. The bottom end of the input pipe 59 is communicated with the output end of the second water pump 62 through a hose A65, and the bottom end of the output pipe 512 is communicated with the water tank of the cooling unit 6 through a hose B66; both the hose A65 and the hose B66 are in a threaded shape. Through the above settings of the present invention, the first water pump 61 is used for the circulation of the cooling water on the fixed die 4, and the second water pump 62 is used for the circulation of the cooling water on the moving die 5. In the dynamic cooling system of the injection mold, the movement of the moving die 5 will cause the pipelines connected to the cooling system to expand and contract. If ordinary corrugated straight pipes are used, the length of the water flow path is likely to change during expansion and contraction, affecting the stability of the cooling water circulation. If ordinary straight hoses are used, folding may occur, thus affecting the stability of the cooling water circulation and the service life of the ordinary straight hoses. However, in the present invention, by setting both the hose A65 and the hose B66 to be in a threaded shape, when the hose A65 and the hose B66 expand and contract, they mainly adapt to the movement through the elastic deformation of the spiral structure, and the effective length of the internal water channel remains unchanged, so as to maintain a stable water flow speed and pressure. The spiral structure has a high elastic deformation ability, can adapt to the high-frequency movement of the mold opening and closing, reduce the mechanical stress concentration, extend the service life of the hose, and the threaded structure still maintains a smooth inner wall transition during expansion and contraction, avoiding sharp bends or folding, reducing the pressure loss, protecting the cooling system, and extending the service life of the water pump and the pipeline.

[0066] Working principle: This embodiment provides an injection molding machine cooling system. When in use, the first water pump 61 operates, and the cooling water in the machine case 1 sequentially passes through the pipeline unit A63, one of the through pipes 47, one of the flow grooves B44 and the flow groove C46, three flow grooves A43, the other flow groove B44 and the flow groove C46, and the other through pipe 47 and returns to the machine case 1 to form a cycle, enabling the cooling water in the cooling bowl cavity 41 to rotate, and the heat generated by injection molding can be carried away by replacement. The cooling ring cavity 45 is used to cool the bottoms of the four bowl cavities and forms a circulating cooling structure with the two flow grooves C. The cooling liquid in the cooling ring cavity 45 is replaced, and the replacement efficiency is higher, thereby increasing the cooling speed of the bowl bottom, making the cooling time of the body and the bottom of the injection molded bowl close or even the same, and thus improving the production efficiency of the injection molded bowl. The turbulence balls 452 rotate as the cooling water in the cooling ring cavity 45 flows. The addition of the turbulence balls 452 increases the rotational inertia of the cooling water in the cooling ring cavity 45, and the turbulence balls 452 move in the water flow, changing the water flow from laminar flow to turbulent flow, breaking the thermal boundary layer between the cooling water and the wall of the cooling ring cavity 45, enhancing the disturbance of the cooling water, and improving the heat exchange efficiency, thereby enhancing the overall cooling effect;

[0067] The second water pump 62 operates, and the cooling water sequentially passes through the hose A65, the input pipe 59, the input flow channel 57, the four branch flow channels A58, the four input hole grooves 56 and enters the four cooling water cavities to cool the inner surfaces of the four injection molded bowls, and then sequentially passes through the four return cavities and the four branch flow channels B511 and flows into the output flow channel 510, and is output from the output pipe 512 and returns to the machine case 1 through the hose B66 to form a cycle, realizing the cooling of the inner surface of the injection molded bowl, further enhancing the cooling effect of the injection mold and the plastic bowl. When the water flow enters the input hole groove 56, part of the water flow enters the turbulence groove 562 along the guide arc plate 563, reducing the impact force of the cooling water on the first water cavity 52, and the cooling water passes through the turbulence groove 562 and converges with the cooling water in the input hole groove 56 again for turbulence, enabling the cooling water to be dispersed in the cooling water cavity in the first time. The number of the designed several turbulence grooves 562 is odd to prevent the cooling water passing through the turbulence grooves 562 from affecting each other and affecting the turbulence effect, reducing the direct impact force of the cooling water on the first water cavity 52, enhancing the service life of the moving mold 5, and reducing the heat generated by the impact of the cooling water, reducing the energy loss and enhancing the cooling effect. When the cooling water enters the return cavity, it will cause the guide plate 553 to drive the adaptor ring block 552 to rotate, and then the cooling water in the cooling water cavity and the return cavity rotates. The rotation of the cooling water in the cooling water cavity makes the cooling of the inner surface of the injection molded bowl more uniform, and the adaptor ring block 552 is in a frustum shape. The centrifugal force generated by the rotation of the cooling water helps the cooling water in the cooling water cavity to enter the return cavity. The rotation of the cooling water in the cooling water cavity and the return cavity helps the cooling water in the cooling water cavity and the return cavity to circulate and be replaced, and is convenient for the cooling water in the return cavity to enter the branch flow channel B511 and rotate, thereby enhancing the heat dissipation effect;

[0068] The movement of the moving mold 5 causes the hoses A65 and B66 to expand and contract. It mainly adapts to the movement through the elastic deformation of the spiral structure, while the effective length of the internal water channel remains unchanged, thus maintaining a stable water flow rate and pressure. The spiral structure has a high elastic deformation ability, can adapt to the high-frequency movement of the mold opening and closing, reduce mechanical stress concentration, extend the service life of the hoses, and the corrugated structure still maintains a smooth inner wall transition during expansion and contraction, avoiding sharp bends or folds, reducing pressure loss, protecting the cooling system, and extending the life of the water pump and pipeline.

[0069] The embodiments disclosed in the present invention are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. An injection molding machine cooling system, characterized in that, It includes a chassis. On one side of the top of the chassis, there is an empty slot. On the other side of the chassis, an injection mechanism is fixedly installed. Opposite to the empty slot on the top of the chassis, a mold clamping mechanism is fixedly installed. The fixed end of the mold clamping mechanism is provided with a fixed mold, and the moving end of the mold clamping mechanism is provided with a moving mold. Inside the chassis, a cooling unit for cooling the fixed mold and the moving mold is fixedly installed; On one end of the fixed mold away from the injection mechanism, four bowl-shaped cavities are evenly opened. Inside the fixed mold, four bowl body cooling cavities for cooling the peripheral side of the bowl body of the bowl-shaped cavity are opened. Inside the fixed mold, three flow channels A are opened. The three flow channels A are arranged in a U-shaped structure with the opening facing downwards, and both ends of the flow channel A are respectively communicated with the outer quadrant points of the bowl body parts of the corresponding two bowl-shaped cavities. At the bottom of the fixed mold, two flow channels B are opened. The two flow channels B are arranged in a figure-eight structure. The top ends of the two flow channels B are respectively communicated with the bottom quadrant points of the bowl body parts of the two bowl-shaped cavities located at the bottom. Inside the fixed mold, opposite to the bottom positions of the four bowl-shaped cavities, a cooling ring cavity is opened. At the bottom of the fixed mold, two flow channels C arranged in a figure-eight structure are opened. The top ends of the flow channels C are both communicated with the cooling ring cavity; On the cooling ring cavity, a number of movable ring grooves are arranged in an inner and outer structure, and a number of flow disturbance balls are movably arranged on the movable ring grooves; The cooling ring cavity includes a circular cavity for cooling the bottom part of the bowl-shaped cavity. The outer peripheral side of the circular cavity is communicated with a foot ring cooling cavity for cooling the foot ring part of the bowl-shaped cavity. The foot ring cooling cavity is adapted to the foot ring part of the bowl-shaped cavity. The gaps between any two adjacent circular cavities are connected through arc cavities; On one end of the moving mold close to the injection mechanism, four convex blocks are fixedly installed. The inside of the convex blocks is hollow to form a first water cavity. Inside the moving mold, a second water cavity communicated with the first water cavity is opened. The second water cavity is in a frustum structure. At one end of the second water cavity away from the first water cavity, a fixing groove is opened. On the fixing groove, a flow dividing column is fixedly installed. One end of the flow dividing column close to the first water cavity passes through the second water cavity and extends into the first water cavity. The flow dividing column is adapted to the shape of the first water cavity. The gap between the flow dividing column and the first water cavity forms a cooling water cavity, and the gap between the flow dividing column and the second water cavity forms a return cavity. An input hole groove is opened inside the flow dividing column. Opposite to the positions of the four input hole grooves at the bottom of the moving mold, input flow channels are opened. The input flow channels and the four input hole grooves are all communicated through branch channels A. An input pipe communicated with the input flow channels is fixedly installed at the bottom of the moving mold. Opposite to the positions of the four second water cavities at the bottom of the moving mold, output flow channels are opened. The output flow channels and the four second water cavities are all communicated through branch channels B. An output pipe communicated with the output flow channels is fixedly installed at the bottom of the moving mold; On one end of the flow dividing column close to the first water cavity, a rotating groove is opened. An adapting ring block is rotatably arranged on the rotating groove. On the adapting ring block, a number of partially spiral guide plates are fixedly installed in an annular equally spaced structure; At one end of the input hole groove close to the first water cavity, a horn-shaped groove is opened. On the input hole groove, a number of flow disturbance grooves are opened in an annular equally spaced structure. Opposite to the positions of the number of flow disturbance grooves inside the input hole groove, a number of guide arc plates are fixedly installed.

2. The injection molding machine cooling system according to claim 1, wherein, Both the flow channel A and the flow channel B are adapted to the shape of the bowl body part of the bowl cavity, and the flow channel A is communicated with the flow channel B.

3. The injection molding machine cooling system according to claim 2, wherein Two through pipes are fixedly arranged at the bottom end of the fixed mold, a flow guiding block is fixedly arranged in the through pipes, and the inner surface of the through pipes and the two ends of the flow guiding block respectively form a flow guiding groove A adapted to the flow channel B and a flow guiding groove B adapted to the flow channel C.

4. The injection molding machine cooling system according to claim 3, characterized in that, The fixed mold and the fixed end of the mold clamping mechanism are fixedly connected through a heat insulation plate A. An injection main pipe is arranged on one side of the heat insulation plate A close to the injection mechanism. The injection main pipe is communicated with the output end of the injection mechanism. Four injection branch pipes are communicated and arranged at one end of the injection main pipe far away from the injection mechanism. One end of the injection branch pipe far away from the injection mechanism sequentially passes through the fixed mold and the cooling ring cavity and is communicated with the bowl cavity.

5. The injection molding machine cooling system according to claim 4, characterized in that, A heat insulation plate B is fixedly arranged at one end of the movable mold far away from the injection mechanism, and the heat insulation plate B is fixedly connected with the movable end of the mold clamping mechanism.

6. The injection molding machine cooling system according to claim 5, characterized in that, The number of the plurality of flow disturbing grooves is odd.

7. The injection molding machine cooling system according to claim 6, wherein, The two ends of the water tank of the cooling unit are respectively communicated with a first water pump and a second water pump. The bottom end of one of the through pipes is communicated with the output end of the first water pump through a pipeline unit A. The bottom end of the other through pipe is communicated with the water tank of the cooling unit through a pipeline unit B. The bottom end of the input pipe is communicated with the output end of the second water pump through a hose A. The bottom end of the output pipe is communicated with the water tank of the cooling unit through a hose B. Both the hose A and the hose B are in a spiral shape.

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