Cooling system of injection molding machine

Abstract

The invention discloses a cooling system of an injection molding machine, relates to the technical field of injection molding machines, aims to solve the technical problem of poor cooling effect of an injection mold and a plastic bowl, and comprises a case, an injection mechanism, a mold closing mechanism, a fixed mold, a movable mold and a cooling unit of the movable mold. A bowl cavity is cooled in a cooling cavity mode, the cooling uniformity of an injection molding bowl during injection molding cooling is guaranteed, the technical problem that the cooling effect of an injection mold and the plastic bowl is poor is solved, the bowl body cooling cavity is used for cooling the bowl body part of the bowl cavity, and the bowl body cooling cavity, the flowing groove A and the flowing groove B form a circulating cooling structure; cooling water in the cooling bowl cavities rotates and is replaced to take away heat generated by injection molding, the cooling annular cavity is used for cooling the bottoms of the four bowl cavities, the cooling annular cavity and the two flowing grooves C form a circulating cooling structure, cooling liquid in the cooling annular cavity is replaced, the replacement efficiency is higher, and therefore the cooling speed of the bottoms of the bowl cavities is increased; and the cooling time of the bowl body and the bowl bottom of the injection-molded bowl is close to or even the same.

Description

Technical Field

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

[0002] Injection molding machine is an automated equipment that heats and melts plastic particles and then injects them into the mold cavity under high pressure, and then cools and shapes them into plastic products. It is widely used in daily necessities, electronic accessories, medical devices and other fields. Its core process includes five stages: plasticization, injection, pressure holding, cooling, and demolding. The cooling stage has a decisive influence on molding efficiency and product quality. Plastic bowls are thin-walled products, which require extremely high cooling uniformity. Plastic bowl injection molding machines usually achieve rapid shaping by cooling the mold.

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

[0004] Existing plastic bowl injection molding machines usually open water channels in the mold to circulate cooling water. In this cooling method, the distance between the water channel and the mold cavity surface is inconsistent, the cooling is uneven, and the cooling effect is poor, resulting in a temperature difference in the mold cavity. When the mold is closed and cooled, different areas of the plastic bowl are prone to different shrinkage rates, resulting in surface shrinkage marks in the insufficiently cooled areas, especially the bottom of the bowl is prone to depression, resulting in a high scrap rate. In view of this, we propose a cooling system for injection molding machines. Summary of the invention

[0005] The object 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 injection molds and plastic bowls.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A cooling system for an injection molding machine, comprising a chassis, a top side of the chassis is provided with an empty slot, the other side of the chassis is fixedly provided with an injection mechanism, the top of the chassis is fixedly provided with a clamping mechanism at a position relative to the empty slot, the fixed end of the clamping mechanism is provided with a fixed mold, the movable end of the clamping mechanism is provided with a movable mold, and a cooling unit for cooling the fixed mold and the movable mold is fixedly provided in the chassis; The fixed mold is evenly provided with four bowl cavities at one end away from the injection mechanism, and four bowl body cooling cavities for cooling the periphery of the bowl cavity are provided in the fixed mold. The fixed mold is provided with three flow grooves A, and the three flow grooves A are arranged in a U-shaped structure with the opening facing downward, and the two ends of the flow grooves A are respectively connected with the outer quadrant points of the two corresponding bowl cavity bowl body parts, and the bottom end of the fixed mold is provided with two flow grooves B, and the two flow grooves B are arranged in an eight-shaped structure, and the top ends of the two flow grooves B are respectively connected with the bottom quadrant points of the two bowl cavity bowl body parts located at the bottom, and a cooling ring cavity is provided in the fixed mold relative to the bottom of the four bowl cavities, and the bottom end of the fixed mold is provided with two flow grooves C arranged in an eight-shaped structure, and the top ends of the flow grooves C are both connected with the cooling ring cavity. The present invention cools the bowl cavity in the form of a cooling cavity, thereby ensuring uniform cooling of the injection molded bowl during injection molding cooling, and solving the technical problem of poor cooling effect of the injection mold and the plastic bowl, wherein the bowl body cooling cavity is used to cool the bowl cavity body part, and forms a circulating cooling structure with flow groove A and flow groove B. During cooling, the cooling water in the cooling bowl cavity rotates and can be displaced to carry away the heat generated by injection molding. The cooling ring cavity is used to cool the bottom of the four bowl cavities, and forms a circulating cooling structure with two flow grooves C. The cooling liquid in the cooling ring cavity is displaced, and the displacement efficiency is higher, thereby improving the cooling speed of the bottom of the bowl cavity, so that the cooling time of the bowl body and the bottom of the injection molded bowl is close to or even the same, thereby improving the production efficiency of the injection molded bowl.

[0007] Preferably, the flow groove A and the flow groove B are both adapted to the shape of the bowl body of the bowl cavity, and the flow groove A is connected to the flow groove B.

[0008] Preferably, the cooling ring cavity is provided with a plurality of movable ring grooves in an inner and outer structure, and a plurality of flow interference balls are movably provided on the movable ring grooves.

[0009] Preferably, the cooling ring cavity includes a circular cavity for cooling the bottom of the bowl cavity, and the outer peripheral side of the circular cavity is connected to a foot ring cooling cavity for cooling the foot ring of the bowl cavity. The foot ring cooling cavity is adapted to the foot ring of the bowl cavity, and the gaps between any two adjacent circular cavities are connected through an arc cavity.

[0010] Preferably, two through tubes are fixedly provided at the bottom end of the fixed mold, and a guide block is fixedly provided inside the through tubes. The inner surface of the through tubes and the two ends of the guide blocks respectively constitute a guide groove A adapted to the flow groove B and a guide groove B adapted to the flow groove C.

[0011] Preferably, the fixed mold is fixedly connected to the fixed end of the mold clamping mechanism through an insulation plate A, and an injection main pipe is provided on the side of the insulation plate A close to the injection mechanism, and the injection main pipe is connected to the output end of the injection mechanism. The injection main pipe is connected to four injection branches at one end away from the injection mechanism, and the injection branch pipe passes through the fixed mold and the cooling ring cavity in sequence at one end away from the injection mechanism and is connected to the bowl cavity.

[0012] Preferably, a heat insulation plate B is fixedly provided at one end of the movable mold away from the injection mechanism, and the heat insulation plate B is fixedly connected to the movable end of the mold clamping mechanism. Four protrusions are fixedly provided at one end of the movable mold close to the injection mechanism, and the interior of the protrusions is hollow to form a first water cavity. A second water cavity connected to the first water cavity is provided in the movable mold, and the second water cavity is in a truncated cone structure. A fixed groove is provided at one end of the second water cavity away from the first water cavity, and a diverter column is fixed on the fixed groove. The diverter column passes through the second water cavity at one end close to the first water cavity and extends into the first water cavity. The diverter column is adapted to the shape of the first water cavity, so The gap between the diverter column and the first water cavity forms a cooling water cavity, the gap between the diverter column and the second water cavity forms a reflux cavity, an input hole groove is provided in the diverter column, an input flow channel is provided at the bottom end of the movable mold relative to the four input hole grooves, the input flow channel and the four input hole grooves are connected through a branch flow channel A, an input pipe connected to the input flow channel is fixedly provided at the bottom end of the movable mold, an output flow channel is provided at the bottom end of the movable mold relative to the four second water cavity positions, the output flow channel and the four second water cavities are connected through a branch flow channel B, and an output pipe connected to the output flow channel is fixedly provided at the bottom end of the movable mold.

[0013] Preferably, a rotating groove is provided at one end of the diverter column close to the first water chamber, an adaptable ring block is rotatably provided on the rotating groove, and a plurality of partially spiral guide plates are fixedly provided on the adaptable ring block in an annular structure with equal spacing.

[0014] Preferably, the input hole groove is provided with a trumpet groove near one end of the first water cavity, a plurality of flow disturbance grooves are provided in a circular structure with equal spacing on the input hole groove, and a plurality of guide arc plates are fixedly provided in the input hole groove at positions corresponding to the plurality of flow disturbance grooves; Among them, the number of some of the spoiler grooves is an odd number.

[0015] Preferably, the first water pump and the second water pump are respectively connected at both ends of the water tank of the cooling unit, wherein the bottom end of one of the through pipes is connected to the output end of the first water pump through a pipe unit A, and the bottom end of the other through pipe is connected to the water tank of the cooling unit through a pipe unit B, the bottom end of the input pipe is connected to the output end of the second water pump through a hose A, and the bottom end of the output pipe is connected to the water tank of the cooling unit through a hose B; the hose A and the hose B are both threaded.

[0016] The beneficial effects of the present invention are: 1. The present invention cools the bowl cavity in the form of a cooling cavity to ensure uniform cooling of the injection molded bowl during injection molding, thereby solving the technical problem of poor cooling effect of the injection mold and the plastic bowl. The bowl body cooling cavity is used to cool the bowl body of the bowl cavity, and forms a circulating cooling structure with flow groove A and flow groove B. During cooling, the cooling water in the cooling bowl cavity rotates and can be displaced to take away the heat generated by injection molding. The cooling ring cavity is used to cool the bottom of the four bowl cavities, and forms a circulating cooling structure with two flow grooves C. The cooling liquid in the cooling ring cavity is displaced, and the displacement 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 bottom of the injection molded bowl close to or even the same, thereby improving the production efficiency of the injection molded bowl.

[0017] 2. The present invention arranges the spoiler ball so that the spoiler ball can rotate with the flow of cooling water in the cooling ring cavity. The addition of the spoiler ball increases the rotational inertia of the cooling water in the cooling ring cavity, and the spoiler ball moves in the water flow, causing the water flow to change 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.

[0018] 3. The present invention adopts the structural design of the movable mold so that when the mold is closed, the protrusion and the bowl cavity form an injection cavity, and the cooling water cavity is used to cool the inner surface of the injection bowl. The cooling water enters the input flow channel from the input pipe and passes through four branch flow channels A and four input hole grooves in sequence and enters the four cooling water cavities to cool the inner surfaces of the four injection bowls. After that, the cooling water passes through four reflux cavities and four branch flow channels B in sequence and flows into the output flow channel and is output from the output pipe, thereby cooling the inner surface of the injection bowl and further improving the cooling effect of the injection mold and the plastic bowl.

[0019] 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.

[0020] 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.

[0021] 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

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the fixed mold, movable mold and cooling unit of the present invention.

[0025] Figure 4 It is a schematic structural diagram of the cooling unit of the present invention.

[0026] Figure 5 It is a schematic diagram of the fixed mold and movable mold structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the fixed mold and the movable mold of the present invention.

[0028] Figure 7 for Figure 6 A magnified schematic diagram of the local structure.

[0029] Figure 8 It is a schematic diagram of the split structure of the fixed mold of the present invention.

[0030] Fig. 9 It is a schematic cross-sectional structure diagram of the cooling water flow direction of the fixed mold of the present invention relative to the cooling cavity of the bowl body.

[0031] Fig.10It is a schematic cross-sectional structure diagram of the cooling water flow direction of the fixed mold with respect to the cooling ring cavity of the present invention.

[0032] Fig.11 It is a schematic diagram of the split structure of the through pipe of the present invention.

[0033] Fig.12 It is a schematic diagram of the split structure of the movable mold of the present invention.

[0034] Fig.13 It is a schematic diagram of the splitting structure of the splitter column of the present invention.

[0035] Fig.14 It is a schematic cross-sectional structure diagram of the diverter column of the present invention with respect to the cooling water flow direction of the input hole slot.

[0036] Fig.15 It is a structural schematic diagram of the mold clamping mechanism, the fixed mold and the movable mold of the present invention.

[0037] Description of the numbers in the figure: 1. Chassis; 2. Injection mechanism; 3. Clamping mechanism; 4. Fixed mold; 5. Moving mold; 6. Cooling unit; 11. Empty slot; 40. Insulation board A; 41. Bowl cavity; 42. Bowl 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; 451, movable ring groove; 452, spoiler ball; 453, round cavity; 454, foot ring cooling cavity; 455, arc cavity; 471, guide block; 50, heat insulation board B; 51, convex block; 52, first water cavity; 53, second water cavity; 54, fixed groove; 55, diverter column; 56, input hole groove; 57, input flow channel; 58, branch flow channel A; 59, input pipe; 510, output flow channel; 511, branch channel B; 512, output pipe; 551, rotating groove; 552, adapting ring block; 553, guide plate; 561, horn slot; 562, spoiler slot; 563, guide arc plate; 61. First water pump; 62. Second water pump; 63. Pipe unit A; 64. Pipe unit B; 65. Hose A; 66. Hose B. DETAILED DESCRIPTION

[0038] like Figures 1 to 15 As shown, the present invention relates to a cooling system for an injection molding machine, comprising 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; An empty slot 11 is provided on one side of the top of the chassis 1; The injection mechanism 2 is fixedly mounted on the other side of the chassis 1 ; the injection mechanism 2 is used to melt, mix and inject plastic particles, which is a prior art and will not be described in detail herein.

[0039] The clamping mechanism 3 is fixedly arranged at the top of the chassis 1 relative to the empty slot 11. Fig.14 As shown, it includes a fixed template for the oil cylinder, connected to the fixed mold 4, a movable template for connecting the movable mold 5, and a toggle assembly for amplifying the thrust of the oil cylinder through a mechanical connecting rod structure. The fixed template is marked with the fixed end of the clamping mechanism 3, and the movable template is marked with the movable end of the clamping mechanism 3. The toggle assembly has a speed-up effect.

[0040] The fixed mold 4 is arranged at the fixed end of the clamping mechanism 3, and 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 bowl body of the bowl cavity 41 are opened in the fixed mold 4. Three flow grooves A43 are opened in the fixed mold 4. The three flow grooves A43 are arranged in a U-shaped structure with the opening facing downward, and the two ends of the flow grooves A43 are respectively connected to the outer quadrant points of the bowl body parts of the corresponding two bowl cavities 41. Two flow grooves B44 are opened at the bottom of the fixed mold 4. The two flow grooves B44 are arranged in an eight-shaped structure. The top ends of the two flow grooves B44 are respectively connected to the bottom quadrant points of the bowl body parts of the two bowl cavities 41 located at the bottom. A cooling ring cavity 45 is opened in the fixed mold 4 relative to the bottom of the four bowl cavities 41. Two flow grooves C46 arranged in an eight-shaped structure are opened at the bottom of the fixed mold 4, and the top ends of the flow grooves C46 are connected to the cooling ring cavity 45.

[0041] The flow groove A43 and the flow groove B44 are both adapted to the shape of the bowl body of the bowl cavity 41, and the flow groove A43 is connected to the flow groove B44.

[0042] The cooling ring cavity 45 is provided with a plurality of movable annular grooves 451 in an inner and outer structure, and a plurality of flow-interference balls 452 are movably provided on the movable annular grooves 451. The present invention provides the flow-interference balls 452 so that the flow-interference balls 452 can rotate along with the flow of cooling water in the cooling ring cavity 45. The addition of the flow-interference balls 452 increases the rotational inertia of the cooling water in the cooling ring cavity 45, and the flow-interference balls 452 move in the water flow, so that the water flow changes from laminar flow to turbulent flow, destroys the thermal boundary layer between the cooling water and the wall of the cooling ring cavity 45, enhances the disturbance of the cooling water, improves the heat exchange efficiency, and thus improves the overall cooling effect.

[0043] The cooling ring cavity 45 includes a circular cavity 453 for cooling the bottom of the bowl cavity 41. The outer circumference of the circular cavity 453 is connected to a foot ring cooling cavity 454 for cooling the foot ring of the bowl cavity 41. The foot ring cooling cavity 454 is adapted to the foot ring of the bowl cavity 41. The gaps between any two adjacent circular cavities 453 are connected through the arc cavity 455. The present invention provides the foot ring cooling cavity 454 for cooling the foot ring of the bowl cavity 41 to ensure uniform cooling.

[0044] Two through pipes 47 are fixedly provided at the bottom end of the fixed mold 4, and a guide block 471 is fixedly provided in the through pipe 47. The inner surface of the through pipe 47 and the two ends of the guide block 471 respectively form a guide groove A adapted to the flow groove B44 and a guide groove B adapted to the flow groove C46. The present invention guides the cooling water in the through pipe 47 by arranging the guide block 471 in the through pipe 47, thereby reducing the heat generated by the collision between the cooling water and the fixed mold 4, and has an energy-saving effect.

[0045] The fixed mold 4 is fixedly connected to the fixed end of the mold clamping mechanism 3 through an insulation board A40. An injection main pipe 48 is provided on the side of the insulation board A40 close to the injection mechanism 2. The injection main pipe 48 is connected to the output end of the injection mechanism 2. The injection main pipe 48 is connected to four injection branch pipes 49 at one end away from the injection mechanism 2. The injection branch pipes 49 pass through the fixed mold 4 and the cooling ring cavity 45 in sequence at one end away from the injection mechanism 2 and are connected to the bowl cavity 41.

[0046] The movable mold 5 is fixedly provided with a heat insulation board B50 at one end away from the injection mechanism 2, and the heat insulation board B50 is fixedly connected to the moving end of the mold clamping mechanism 3. The movable mold 5 is fixedly provided with four protrusions 51 at one end close to the injection mechanism 2. The protrusions 51 are hollow inside to form a first water cavity 52. ​​A second water cavity 53 connected to the first water cavity 52 is provided in the movable mold 5. The second water cavity 53 is in a truncated cone structure. A fixed groove 54 is provided at one end of the second water cavity 53 away from the first water cavity 52. ​​A diverter column 55 is fixedly provided on the fixed groove 54. The diverter column 55 passes through the second water cavity 53 at one end close to the first water cavity 52 and extends into the first water cavity 52. ​​The diverter column 55 is adapted in shape to the first water cavity 52. The gap between the first water chamber 52 constitutes a cooling water chamber, the gap between the diverter column 55 and the second water chamber 53 constitutes a reflux chamber, an input hole slot 56 is provided in the diverter column 55, an input flow channel 57 is provided at the bottom of the movable mold 5 at a position corresponding to the four input hole slots 56, the input flow channel 57 and the four input hole slots 56 are connected through a branch flow channel A58, an input pipe 59 connected to the input flow channel 57 is fixed at the bottom of the movable mold 5, an output flow channel 510 is provided at the bottom of the movable mold 5 at a position corresponding to the four second water chambers 53, the output flow channel 510 and the four second water chambers 53 are connected through a branch flow channel B511, and an output pipe 512 connected to the output flow channel 510 is fixed at the bottom of the movable mold 5. Through the above arrangement, the present invention enables Figure 6 and Figure 7 As shown, when the mold is closed, the protrusion 51 and the bowl cavity 41 form an injection cavity, and the cooling water cavity is used to cool the inner surface of the injection bowl. The cooling water enters the input channel 57 from the input pipe 59 and passes through four branch channels A58 and four input hole grooves 56 in sequence and enters the four cooling water chambers to cool the inner surfaces of the four injection bowls. After that, it passes through four reflux chambers and four branch channels B511 in sequence and flows into the output channel 510, and is output from the output pipe 512, thereby cooling the inner surface of the injection bowl, further improving the cooling effect of the injection mold and the plastic bowl.

[0047] A rotating groove 551 is provided at one end of the diverter column 55 close to the first water chamber 52, and an adaptable ring block 552 is rotatably provided on the rotating groove 551, and a plurality of partially spiral guide plates 553 are fixedly provided on the adaptable ring block 552 in an annular and equidistant structure. The present invention further designs the diverter column 55, so that when the cooling water enters the reflux chamber, the guide plate 553 drives the adaptable ring block 552 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 molding bowl cool more evenly, and the adaptable ring block 552 is truncated cone-shaped, and 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 B511 for rotation, thereby improving the heat dissipation effect.

[0048] A trumpet groove 561 is formed at one end of the input hole groove 56 close to the first water chamber 52, and several interference flow grooves 562 are formed in an annular structure with equal spacing on the input hole groove 56. A plurality of guide arc plates 563 are fixedly disposed in the input hole groove 56 at positions corresponding to the interference flow grooves 562. If the number of the interfering flow slots 562 is an odd number, the present invention further designs the input hole slots 56, such as Fig.15 As shown, when the water flows into the input hole groove 56, part of the water flows along the guide arc plate 563 and enters the spoiler groove 562, thereby reducing the impact force between the cooling water and the first water cavity 52, and the cooling water reconverges with the cooling water in the input hole groove 56 through the spoiler groove 562 for spoiler flow, so that the cooling water is dispersed in the cooling water cavity for the first time. If the number of the spoiler grooves 562 is an odd number, it is designed to prevent the cooling water passing through the spoiler groove 562 from affecting each other and affecting the spoiler effect, thereby reducing the direct impact force between the cooling water and the first water cavity 52, and improving the service life of the movable mold 5, and reducing the heat generated by the impact of the cooling water, reducing energy loss and improving the cooling effect.

[0049] The cooling unit 6 is fixed in the chassis 1, and the two ends of the water tank of the cooling unit 6 are respectively connected to the first water pump 61 and the second water pump 62, wherein the bottom end of one through pipe 47 is connected to the output end of the first water pump 61 through a pipe unit A63, the bottom end of the other through pipe 47 is connected to the water tank of the cooling unit 6 through a pipe unit B64, the bottom end of the input pipe 59 is connected to the output end of the second water pump 62 through a hose A65, and the bottom end of the output pipe 512 is connected to the water tank of the cooling unit 6 through a hose B66; the hose A65 and the hose B66 are both threaded. Through the above-mentioned arrangement, the present invention enables the first water pump 61 to circulate cooling water on the fixed mold 4, and the second water pump 62 to circulate cooling water on the movable mold 5. In the dynamic cooling system of the injection mold, the movement of the movable mold 5 will cause the pipe connected to the cooling system to expand and contract. If an ordinary corrugated straight pipe is used, the expansion and contraction will easily cause the water flow path length to change, affecting the stability of the cooling water circulation. If an ordinary straight hose is used, folding may occur, thereby affecting the stability of the cooling water circulation and the service life of the ordinary straight hose. The present invention sets the hose A65 and the hose B66 to be threaded, so that 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, thereby maintaining 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 mechanical stress concentration, and extend the service life of the hose. The ribbed structure still maintains a smooth inner wall transition during expansion and contraction, avoids sharp bends or folding, reduces pressure loss, protects the cooling system, and extends the life of the water pump and pipeline.

[0050] Working principle: This embodiment provides a cooling system for an injection molding machine. When in use, the first water pump 61 works, and the cooling water in the chassis 1 sequentially passes through the pipeline unit A63, one of the through pipes 47, one of the flow grooves B44 and flow groove C46, ​​three flow grooves A43, another flow groove B44 and flow groove C46, ​​and another through pipe 47 to return to the chassis 1, forming a cycle, so that the cooling water in the cooling bowl cavity 41 rotates and can be displaced to take away the heat generated by injection molding. The cooling ring cavity 45 is used to cool the bottom of the four bowl cavities and forms a circulating cooling structure with the two flow grooves C. The cooling ring cavity 45 is used to cool the bottom of the four bowl cavities and forms a circulating cooling structure with the two flow grooves C. The cooling liquid in the cavity 45 is replaced with a higher replacement efficiency, thereby increasing the cooling speed of the bottom of the bowl cavity, making the cooling time of the bowl body and the bottom of the injection molding bowl close to or even the same, thereby improving the production efficiency of the injection molding bowl. The spoiler ball 452 rotates with the flow of cooling water in the cooling ring cavity 45. The addition of the spoiler ball 452 increases the rotational inertia of the cooling water in the cooling ring cavity 45, and the spoiler ball 452 moves 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 45, enhancing the disturbance of the cooling water, and improving the heat exchange efficiency, thereby improving the overall cooling effect. The second water pump 62 works, and the cooling water 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 in turn, and enters the four cooling water chambers to cool the inner surfaces of the four injection molding bowls. Then, the cooling water passes through the four reflux chambers and the four branch flow channels B511 in turn and flows into the output flow channel 510, and is output from the output pipe 512, and returns to the chassis 1 through the hose B66, forming a cycle, so as to cool the inner surface of the injection molding bowl, and further improve the cooling effect of the injection mold and the plastic bowl. When the water flows into the input hole groove 56, part of the water flows along the guide arc plate 563 and enters the spoiler groove 562, so as to reduce the impact force of the cooling water and the first water chamber 52, and the cooling water passes through the spoiler groove 562 and converges with the cooling water in the input hole groove 56 again to disturb the flow, so that the cooling water is dispersed in the cooling water chamber for the first time. If the number of the interference flow grooves 562 is designed, The amount is an odd number to prevent the cooling water passing through the spoiler groove 562 from affecting each other and affecting the spoiler effect, reduce the direct impact force between the cooling water and the first water cavity 52, and improve the service life of the movable mold 5, and reduce the heat generated by the impact of the cooling water, reduce energy loss and improve the cooling effect. When the cooling water enters the reflux cavity, the guide plate 553 will drive the adaptation ring block 552 to rotate, thereby rotating the cooling water in the cooling water cavity and the reflux cavity. The rotation of the cooling water in the cooling water cavity makes the cooling of the inner surface of the injection bowl more uniform, and the adaptation ring block 552 is quasi-conical. The centrifugal force generated by the rotation of the cooling water helps the cooling water in the cooling water cavity to enter the reflux cavity. The rotation of the cooling water in the cooling water cavity and the reflux cavity helps the cooling water in the cooling water cavity and the reflux cavity to circulate and replace, and facilitates the cooling water in the reflux cavity to enter the branch channel B511 for rotation, thereby improving the heat dissipation effect; The movement of the movable mold 5 causes the hose A65 and the hose B66 to expand and contract, mainly through the elastic deformation of the spiral structure to adapt to the movement, while the effective length of the internal water channel remains unchanged, thereby maintaining a stable water flow speed and pressure. The spiral structure has a high elastic deformation ability and can adapt to the high-frequency movement of the mold opening and closing, reduce mechanical stress concentration, and extend the service life of the hose. The ribbed structure still maintains a smooth inner wall transition when expanding and contracting, avoiding sharp bends or folding, reducing pressure loss, protecting the cooling system, and extending the life of the water pump and pipelines.

[0051] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled 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 deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A cooling system for an injection molding machine, characterized in that: It comprises a chassis, a top side of the chassis is provided with an empty slot, the other side of the chassis is fixedly provided with an injection mechanism, the top of the chassis is fixedly provided with a clamping mechanism at a position relative to the empty slot, a fixed mold is provided at a fixed end of the clamping mechanism, a movable mold is provided at a movable end of the clamping mechanism, and a cooling unit for cooling the fixed mold and the movable mold is fixedly provided in the chassis; The fixed mold is evenly provided with four bowl cavities at one end away from the injection mechanism, and four bowl body cooling cavities for cooling the periphery of the bowl cavity are provided in the fixed mold. The fixed mold is provided with three flow grooves A, and the three flow grooves A are arranged in a U-shaped structure with the opening facing downward, and the two ends of the flow grooves A are respectively connected with the outer quadrant points of the two corresponding bowl cavity bowl body parts, and the bottom end of the fixed mold is provided with two flow grooves B, and the two flow grooves B are arranged in an eight-shaped structure, and the top ends of the two flow grooves B are respectively connected with the bottom quadrant points of the two bowl cavity bowl body parts located at the bottom, and a cooling ring cavity is provided in the fixed mold relative to the bottom of the four bowl cavities, and the bottom end of the fixed mold is provided with two flow grooves C arranged in an eight-shaped structure, and the top ends of the flow grooves C are both connected with the cooling ring cavity.

2. The cooling system for an injection molding machine according to claim 1, characterized in that: The flow groove A and the flow groove B are both adapted to the shape of the bowl body of the bowl cavity, and the flow groove A is connected to the flow groove B.

3. The cooling system for an injection molding machine according to claim 2, characterized in that: The cooling ring cavity is provided with a plurality of movable ring grooves in an inner and outer structure, and a plurality of flow interference balls are movably provided on the movable ring grooves.

4. The cooling system for an injection molding machine according to claim 3, characterized in that: The cooling ring cavity includes a circular cavity for cooling the bottom of the bowl cavity. The outer circumferential side of the circular cavity is connected to a foot ring cooling cavity for cooling the foot ring of the bowl cavity. The foot ring cooling cavity is adapted to the foot ring of the bowl cavity, and the gaps between any two adjacent circular cavities are connected through an arc cavity.

5. The cooling system for an injection molding machine according to claim 4, characterized in that: Two through pipes are fixedly provided at the bottom end of the fixed mold, and a guide block is fixedly provided inside the through pipes. The inner surface of the through pipes and the two ends of the guide blocks respectively form a guide groove A adapted to the flow groove B and a guide groove B adapted to the flow groove C.

6. The cooling system for an injection molding machine according to claim 5, characterized in that: The fixed mold is fixedly connected to the fixed end of the mold clamping mechanism through an insulation plate A. An injection main pipe is provided on the side of the insulation plate A close to the injection mechanism. The injection main pipe is connected to the output end of the injection mechanism. The injection main pipe is connected to four injection branches at one end away from the injection mechanism. The injection branch pipe passes through the fixed mold and the cooling ring cavity in sequence at one end away from the injection mechanism and is connected to the bowl cavity.

7. The cooling system for an injection molding machine according to claim 6, characterized in that: A heat insulation plate B is fixedly arranged at one end of the movable mold away from the injection mechanism, and the heat insulation plate B is fixedly connected to the movable end of the mold clamping mechanism. Four protrusions are fixedly arranged at one end of the movable mold close to the injection mechanism, and the interior of the protrusions is hollow to form a first water cavity. A second water cavity connected to the first water cavity is provided in the movable mold, and the second water cavity is in a truncated cone structure. A fixed groove is provided at one end of the second water cavity away from the first water cavity, and a diverter column is fixedly arranged on the fixed groove. The diverter column passes through the second water cavity at one end close to the first water cavity and extends into the first water cavity. The diverter column is adapted to the shape of the first water cavity. The gap between the flow column and the first water cavity forms a cooling water cavity, the gap between the diverter column and the second water cavity forms a reflux cavity, an input hole groove is provided in the diverter column, an input flow channel is provided at the bottom end of the movable mold relative to the four input hole grooves, the input flow channel and the four input hole grooves are connected through a branch flow channel A, an input pipe connected to the input flow channel is fixedly provided at the bottom end of the movable mold, an output flow channel is provided at the bottom end of the movable mold relative to the four second water cavity positions, the output flow channel and the four second water cavities are connected through a branch flow channel B, and an output pipe connected to the output flow channel is fixedly provided at the bottom end of the movable mold.

8. The cooling system for an injection molding machine according to claim 7, characterized in that: The diverter column is provided with a rotation groove at one end close to the first water chamber, an adaptable ring block is rotatably provided on the rotation groove, and a plurality of partially spiral guide plates are fixedly provided on the adaptable ring block in an annular structure with equal spacing.

9. The cooling system for an injection molding machine according to claim 8, characterized in that: The input hole groove is provided with a trumpet groove at one end close to the first water cavity, and a plurality of flow disturbance grooves are provided on the input hole groove in an annular structure with equal spacing, and a plurality of guide arc plates are fixedly provided in the input hole groove at positions corresponding to the plurality of flow disturbance grooves; Among them, the number of some of the spoiler grooves is an odd number.

10. The cooling system for an injection molding machine according to claim 9, characterized in that: The first water pump and the second water pump are respectively connected at both ends of the water tank of the cooling unit, wherein the bottom end of one of the through pipes is connected to the output end of the first water pump through a pipe unit A, and the bottom end of the other through pipe is connected to the water tank of the cooling unit through a pipe unit B, the bottom end of the input pipe is connected to the output end of the second water pump through a hose A, and the bottom end of the output pipe is connected to the water tank of the cooling unit through a hose B; the hose A and the hose B are both threaded.

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