Cooling liquid circulating device for blowing mold

Abstract

The cooling liquid circulating device comprises a base, supporting legs are symmetrically installed at the four corners of the bottom of the base, and a supporting column is installed in the middle of the top end of the base. According to the blow molding device, the driving mechanism drives the workbench to rotate, multiple sets of blow molding molds are converted, and meanwhile, the workbench drives the first annular pipe and the second annular pipe to synchronously rotate through the first connecting rod and the second connecting rod; cooling water in the cooling water tank enters a cooling flow channel in the fixed mold through a first communicating pipe, a water inlet groove, a first annular groove, a first annular pipe and a water inlet pipe, and cooling water in the fixed mold flows back to the cooling water tank through a backflow pipe, a second annular pipe, a second annular groove, a backflow groove and a second communicating pipe. According to the blow molding equipment, cooling water can normally and circularly flow while multiple groups of blow molding molds are converted, so that the working efficiency of the blow molding equipment can be improved, and meanwhile, the multiple groups of blow molding molds can be cooled at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of blow mould cooling, in particular to a blow mould cooling liquid circulation device. Background Art

[0002] Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method, mainly used to form hollow plastic products. When the blow molding mold is in use, a coolant circulation device is required to cool the blow molding mold.

[0003] The current blow molding mold coolant circulation device, for example, a blow molding mold coolant circulation device proposed in publication number: CN117283853A, includes a mold, a liquid outlet pipe, an air cooling component, a connecting elbow, a water tank, a liquid distribution pipe, a connecting straight pipe, a cooling cylinder, a temperature control component, a liquid storage tank, a water pump, a water delivery pipe, a water distribution pipe and a connecting pipe; the coolant that has absorbed heat is transported to the spray head through the liquid outlet pipe respectively, and the coolant is sprayed to the upper end of the heat conduction plate through the spray head. The sprayed coolant will flow downward along the heat conduction plate. During the flow, the heat conduction plate will absorb the heat. At the same time, the fan provided on the left side of the outer shell will blow air into the outer shell, and the fan provided on the right side will suck the gas in the outer shell to the outside, thereby realizing rapid air circulation, and the cooling airflow will take away the heat through the air hole to cool the heat conduction plate, so as to achieve the purpose of cooling the coolant under convection.

[0004] The existing blow mold coolant circulation device can cool the blow mold when in use. However, it is found that in order to improve production efficiency, the existing blow molding equipment is provided with multiple groups of blow molds for circulation, and the existing coolant circulation structure is only suitable for fixed blow molds, but not for circulation conversion of multiple groups of blow molds, which is inconvenient to use. Therefore, we propose a blow mold coolant circulation device to solve the problem. Summary of the invention

[0005] The object of the present invention is to provide a blow mold coolant circulation device, which can achieve the goal of allowing cooling water to circulate normally while converting multiple groups of blow molds, and can cool multiple groups of blow molds at the same time while improving the working efficiency of the blow molding equipment.

[0006] To achieve the above object, the present invention provides the following technical solution: a blow mold coolant circulation device, comprising a base, legs are symmetrically installed at the four corners of the bottom of the base, and a support is installed at the middle of the top of the base, wherein: Above the described support column, a workbench is rotatably connected. The workbench is driven by a driving mechanism to rotate. On the top of the four sides of the workbench, fixed molds are symmetrically installed. Outside the workbench near the fixed molds, a movable mold is arranged. On the top of the workbench corresponding to the outside of the movable mold, a support frame is fixedly connected. An electric telescopic rod is installed on the support frame, and the telescopic end of the electric telescopic rod is fixedly connected to the movable mold. On the outer parts of the upper and lower sides of the support column, a first annular groove and a second annular groove are respectively formed. Corresponding to the first annular groove and the second annular groove on the support column, a first annular pipe and a second annular pipe are respectively rotatably connected. The first annular pipe and the second annular pipe are both sleeved on the outside of the support column through support column grooves, and a first sealing ring is installed on the inner wall of the support column groove; The first annular pipe and the second annular pipe are fixedly connected by a first connecting rod. The first annular pipe is fixedly connected to the workbench by a second connecting rod. The bottom of the fixed mold is connected to the first annular pipe through a water inlet pipe. The movable mold is connected to the second annular pipe through a return pipe. Inside the support column corresponding to the first annular groove and the second annular groove, a water inlet groove and a return groove are respectively formed. Below the base, a cooling water tank is arranged. The cooling water tank is communicated with the water inlet groove and the return groove through a first communicating pipe and a second communicating pipe respectively. On the top of the fixed mold and the movable mold, a cooling flow channel on-off mechanism is arranged for controlling the on-off of the cooling flow channels inside the fixed mold and the movable mold.

[0007] Preferably, the driving mechanism includes a motor. The motor is installed at the top end of the support column. An annular gear is installed on the top of the workbench near the annular side of the support column. The shaft end of the motor corresponding to the annular gear is fixedly connected with a reversing gear meshing with it.

[0008] Preferably, a communication groove is formed on the top of the workbench corresponding to the movable mold. The return pipe at the bottom of the movable mold passes through the inside of the workbench through the communication groove.

[0009] Preferably, cooling flow channels are arranged inside both the fixed mold and the movable mold, and the cooling flow channels of the fixed mold and the movable mold are respectively communicated with the water inlet pipe and the return pipe.

[0010] Preferably, the cooling channel on-off mechanism includes a first connecting pipe. The top parts of the fixed mold and the moving mold are respectively provided with a first connecting pipe and a second connecting pipe. The first connecting pipe is communicated with the internal cooling channel of the fixed mold through a first water pipe. The second connecting pipe is communicated with the internal cooling channel of the moving mold through a second water pipe. One end of the second connecting pipe close to the first connecting pipe is provided with a slot. One end of the first connecting pipe corresponding to the slot is communicated with an inserting pipe. A second sealing ring is installed on the inner wall of the slot. One end of the second connecting pipe far from the first connecting pipe is provided with a first guide rod groove. A first guide rod penetrates through the first guide rod groove. One end of the first guide rod outside the second connecting pipe is fixedly connected with a baffle. One end of the first guide rod inside the second connecting pipe is fixedly connected with a piston. A first spring is sleeved on the first guide rod between the piston and the first guide rod groove. One end of the piston far from the first guide rod is fixedly connected with a push rod. A fixing frame is fixedly connected to the inside of the inserting pipe near the opening. A water passing groove penetrates through the middle of the fixing frame. A fixing plate is fixedly connected to the inner side of the inserting pipe near the middle. A second guide rod groove penetrates through the middle of the fixing plate. A second guide rod penetrates through the second guide rod groove. One end of the second guide rod close to the water passing groove is fixedly connected with a sealing plug. A second spring is sleeved on the second guide rod between the sealing plug and the fixing plate. Water passing holes are equidistantly arranged on the circumferential side of the fixing plate.

[0011] Preferably, the outer diameter of the piston matches the inner diameter of the second connecting pipe.

[0012] Preferably, the push rod is cylindrical, and the outer diameter of the push rod is smaller than the inner diameter of the water passing groove.

[0013] Preferably, the outer diameter of the sealing plug is larger than the inner diameter of the water passing groove, and the sealing plug is elastically connected to the fixing plate through the second spring.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the driving mechanism drives the workbench to rotate to switch multiple groups of blow molding molds. At the same time, the workbench drives the first annular pipe and the second annular pipe to rotate synchronously through the first connecting rod and the second connecting rod. The cooling water in the cooling water tank enters the internal cooling channel of the fixed mold through the first connecting pipe, the water inlet groove, the first annular groove, the first annular pipe, and the water inlet pipe. The cooling water in the fixed mold flows back to the cooling water tank through the return pipe, the second annular pipe, the second annular groove, the return groove, and the second connecting pipe. Through this blow molding mold coolant circulation device, the cooling water can circulate normally while switching multiple groups of blow molding molds, which can improve the working efficiency of the blow molding equipment and can cool multiple groups of blow molding molds at the same time.

[0015] In the present invention, when the electric telescopic rod drives the moving mold to move towards the fixed mold for mold closing, the first connecting pipe and the second connecting pipe are brought closer to each other. When the first connecting pipe drives the insertion pipe to insert into the insertion slot, the insertion pipe and the insertion slot are sealed by the second sealing ring. As the insertion pipe is inserted, the ejector rod passes through the water through-flow groove and abuts against the sealing plug, causing the sealing plug to move away from the water through-flow groove against the elastic force of the second spring. After the water through-flow groove is opened, cooling water can enter the second connecting pipe through the insertion pipe. When the insertion pipe is continuously inserted, the sealing plug drives the piston to move against the elastic force of the first spring through the ejector rod. When the piston is misaligned with the second water pipe, the cooling water can enter the internal cooling channel of the moving mold through the second water pipe, enabling the internal cooling channels of the fixed mold and the moving mold to be automatically connected when the mold is closed, allowing the cooling water to flow normally. When the mold is opened, the piston and the sealing plug are reset by the first spring and the second spring. After the sealing plug abuts against the water through-flow groove, the cooling water inside the fixed mold during mold opening stops flowing, while the cooling water inside the moving mold continues to flow due to gravity and returns to the cooling water tank through the reflux structure. At the same time, the piston moves to the left side of the second water pipe through resetting, preventing the cooling water from flowing back and overflowing. When the fixed mold and the moving mold are opened, the flow of the cooling water can be automatically stopped. Through this cooling channel on-off mechanism, the flow and interruption of the cooling water can be automatically controlled according to the mold closing and mold opening states of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic cross-sectional structure diagram of the pillar of the present invention; Figure 3 is a schematic structure diagram of the cooling channel on-off mechanism of the present invention; Figure 4 is of the present invention Figure 1 is a schematic diagram of the enlarged partial structure at A in Figure 5 is of the present invention Figure 2 is a schematic diagram of the enlarged partial structure at B in Figure 6 is of the present invention Figure 3 is a schematic diagram of the enlarged partial structure at C in

[0017] In the figure: 1, base; 2, leg; 3, pillar; 4, workbench; 5, motor; 6, ring gear; 7, reversing gear; 8, stationary mold; 9, moving mold; 10, support frame; 11, electric telescopic rod; 12, first annular groove; 13, second annular groove; 14, first annular pipe; 15, second annular pipe; 16, pillar groove; 17, first sealing ring; 18, first connecting rod; 19, second connecting rod; 20, water inlet pipe; 21, return pipe; 22, water inlet tank; 23, return tank; 24, cooling water tank; 25, first connecting pipe; 26, second connecting pipe; 27, first connecting tube; 28, second connecting tube; 29, first water pipe; 30, second water pipe; 31, slot; 32, inserting tube; 33, second sealing ring; 34, first guide rod groove; 35, first guide rod; 36, baffle; 37, piston; 38, first spring; 39, ejector rod; 40, fixing frame; 41, water through groove; 42, fixing plate; 43, second guide rod groove; 44, second guide rod; 45, sealing plug; 46, second spring; 47, water through hole; 48, communicating groove. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention. Embodiment

[0019] Please refer to Figures 1 to 6 , the present invention provides a technical solution: a coolant circulation device for a blow molding mold, including a base 1, legs 2 are symmetrically installed at the four corners of the bottom of the base 1, and a pillar 3 is installed in the middle of the top of the base 1. Among them, A workbench 4 is rotatably connected above the pillar 3. The workbench 4 is driven by a driving mechanism to rotate. Fixed molds 8 are symmetrically installed at the top of the four sides of the workbench 4. A moving mold 9 is arranged outside the workbench 4 near the fixed mold 8. A support frame 10 is fixedly connected to the top of the workbench 4 corresponding to the outside of the moving mold 9. An electric telescopic rod 11 is installed on the support frame 10. The telescopic end of the electric telescopic rod 11 is fixedly connected to the moving mold 9. First annular grooves 12 and second annular grooves 13 are respectively opened on the outer parts of the upper and lower sides of the pillar 3. First annular pipes 14 and second annular pipes 15 are respectively rotatably connected to the outside of the pillar 3 corresponding to the first annular grooves 12 and the second annular grooves 13. The first annular pipes 14 and the second annular pipes 15 are sleeved on the outside of the pillar 3 through pillar grooves 16. A first sealing ring 17 is installed on the inner wall of the pillar groove 16; The first annular pipe 14 is fixedly connected to the second annular pipe 15 through a first connecting rod 18. The first annular pipe 14 is fixedly connected to the workbench 4 through a second connecting rod 19. The bottom of the fixed mold 8 is connected to the first annular pipe 14 through a water inlet pipe 20. The moving mold 9 is connected to the second annular pipe 15 through a return pipe 21. Water inlet grooves 22 and return grooves 23 are respectively formed in the inner parts of the support columns 3 corresponding to the first annular groove 12 and the second annular groove 13. A cooling water tank 24 is arranged below the base 1. The cooling water tank 24 is communicated with the water inlet groove 22 and the return groove 23 through a first communicating pipe 25 and a second communicating pipe 26 respectively. A cooling flow channel on-off mechanism is arranged at the tops of the fixed mold 8 and the moving mold 9 for controlling the on-off of the cooling flow channels inside the fixed mold 8 and the moving mold 9; The driving mechanism drives the workbench 4 to rotate to switch multiple groups of blow molding molds. At the same time, the workbench 4 drives the first annular pipe 14 and the second annular pipe 15 to rotate synchronously through the first connecting rod 18 and the second connecting rod 19. The cooling water inside the cooling water tank 24 enters the cooling flow channel inside the fixed mold 8 through the first communicating pipe 25, the water inlet groove 22, the first annular groove 12, the first annular pipe 14, and the water inlet pipe 20. The cooling water inside the fixed mold 8 flows back to the cooling water tank 24 through the return pipe 21, the second annular pipe 15, the second annular groove 13, the return groove 23, and the second communicating pipe 26. Through this blow molding mold coolant circulation device, the cooling water can circulate normally while switching multiple groups of blow molding molds, and can cool multiple groups of blow molding molds simultaneously while improving the working efficiency of the blow molding equipment.

[0020] Please refer to Figures 1 to 6 , the driving mechanism includes a motor 5. The motor 5 is installed at the top end of the support column 3. An annular gear 6 is installed at the top of the workbench 4 close to the circumferential side of the support column 3. A reversing gear 7 meshing with the annular gear 6 is fixedly connected to the shaft end of the motor 5 corresponding to the annular gear 6. When the motor 5 works, it drives the reversing gear 7 to rotate. The meshing of the reversing gear 7 and the annular gear 6 drives the workbench 4 to rotate, and thus can drive multiple groups of blow molding molds to work in a cycle.

[0021] Please refer to Figures 1 to 6 , a communication groove 48 is formed at the top of the workbench 4 corresponding to the moving mold 9. The return pipe 21 at the bottom of the moving mold 9 passes through the inside of the workbench 4 through the communication groove 48. Cooling flow channels are arranged inside both the fixed mold 8 and the moving mold 9, and the cooling flow channels of the fixed mold 8 and the moving mold 9 are respectively communicated with the water inlet pipe 20 and the return pipe 21.

[0022] Please refer to Figures 1 to 6, the cooling channel on-off mechanism includes a first connecting pipe 27. The top parts of the fixed mold 8 and the moving mold 9 are respectively provided with a first connecting pipe 27 and a second connecting pipe 28. The first connecting pipe 27 is connected to the internal cooling channel of the fixed mold 8 through a first water pipe 29, and the second connecting pipe 28 is connected to the internal cooling channel of the moving mold 9 through a second water pipe 30. A slot 31 is opened at one end of the second connecting pipe 28 close to the first connecting pipe 27, and an inserting pipe 32 is communicated with the corresponding slot 31 at one end of the first connecting pipe 27. A second sealing ring 33 is installed on the inner wall of the slot 31. A first guide rod groove 34 is opened at one end of the second connecting pipe 28 far from the first connecting pipe 27. A first guide rod 35 penetrates through the first guide rod groove 34. A baffle 36 is fixedly connected to the outer end of the first guide rod 35 located outside the second connecting pipe 28, and a piston 37 is fixedly connected to the inner end of the first guide rod 35 located inside the second connecting pipe 28. A first spring 38 is sleeved on the first guide rod 35 between the piston 37 and the first guide rod groove 34. A push rod 39 is fixedly connected to one end of the piston 37 far from the first guide rod 35. A fixing frame 40 is fixedly connected to the inside of the inserting pipe 32 near the opening. A water passing groove 41 penetrates through the middle of the fixing frame 40. A fixing plate 42 is fixedly connected to the inner side of the inserting pipe 32 near the middle. A second guide rod groove 43 penetrates through the middle of the fixing plate 42. A second guide rod 44 penetrates through the second guide rod groove 43. A sealing plug 45 is fixedly connected to one end of the second guide rod 44 close to the water passing groove 41. A second spring 46 is sleeved on the second guide rod 44 between the sealing plug 45 and the fixing plate 42. Water passing holes 47 are equidistantly opened on the circumferential side of the fixing plate 42.

[0023] Please refer to Figures 1 to 6, the outer diameter of the piston 37 matches the inner diameter of the second connecting pipe 28. The ejector rod 39 is a cylinder, and the outer diameter of the ejector rod 39 is smaller than the inner diameter of the water through-flow groove 41. The outer diameter of the sealing plug 45 is larger than the inner diameter of the water through-flow groove 41, and the sealing plug 45 is elastically connected to the fixed plate 42 through the second spring 46. When the electric telescopic rod 11 drives the moving mold 9 to move towards the fixed mold 8 for mold closing, the first connecting pipe 27 and the second connecting pipe 28 are brought closer to each other. When the insertion pipe 32 is driven by the first connecting pipe 27 to insert into the insertion slot 31, the insertion pipe 32 and the insertion slot 31 are sealed by the second sealing ring 33. As the insertion pipe 32 is inserted, the ejector rod 39 passes through the water through-flow groove 41 and abuts against the sealing plug 45, causing the sealing plug 45 to move away from the water through-flow groove 41 against the elastic force of the second spring 46. After the water through-flow groove 41 is opened, cooling water can enter the second connecting pipe 28 through the insertion pipe 32. When the insertion pipe 32 is continuously inserted, the sealing plug 45 drives the piston 37 to move against the elastic force of the first spring 38 through the ejector rod 39. When the piston 37 is misaligned with the second water pipe 30, the cooling water can enter the internal cooling channel of the moving mold 9 through the second water pipe 30, enabling the internal cooling channels of the fixed mold 8 and the moving mold 9 to be automatically connected during mold closing, allowing the cooling water to flow normally. During mold opening, the piston 37 and the sealing plug 45 are driven by the first spring 38 and the second spring 46 to reset. After the sealing plug 45 abuts against the water through-flow groove 41, the cooling water flow inside the fixed mold 8 during mold opening stops, while the cooling water inside the moving mold 9 continues to flow due to gravity and returns to the cooling water tank 24 through the reflux structure. At the same time, the piston 37 moves to the left side of the second water pipe 30 through reset, and the right side of the piston 37 is hermetically matched with the first guide rod 35 through the first guide rod groove 34, preventing the cooling water from flowing back and overflowing. When the fixed mold 8 and the moving mold 9 are opened, the flow of the cooling water can be automatically stopped. Through this cooling channel on-off mechanism, the flow and cut-off of the cooling water can be automatically controlled according to the mold closing and opening states of the mold.

[0024] Working principle: For this kind of coolant circulation device of blow molding die, the driving mechanism drives the workbench 4 to rotate, so as to switch multiple groups of blow molding dies. At the same time, the workbench 4 drives the first annular pipe 14 and the second annular pipe 15 to rotate synchronously through the first connecting rod 18 and the second connecting rod 19. The cooling water inside the cooling water tank 24 enters the internal cooling channels of the fixed die 8 through the first connecting pipe 25, the water inlet groove 22, the first annular groove 12, the first annular pipe 14, and the water inlet pipe 20. The cooling water inside the fixed die 8 flows back to the cooling water tank 24 through the return pipe 21, the second annular pipe 15, the second annular groove 13, the return groove 23 and the second connecting pipe 26. Through this coolant circulation device of blow molding die, it can make the cooling water circulate normally while switching multiple groups of blow molding dies, improve the working efficiency of the blow molding equipment, and cool multiple groups of blow molding dies at the same time. Moreover, when the motor 5 works, it drives the reversing gear 7 to rotate. The meshing of the reversing gear 7 and the annular gear 6 drives the workbench 4 to rotate, and then can drive multiple groups of blow molding dies to work in a cycle; When the electric telescopic rod 11 drives the moving die 9 to move towards the fixed die 8 for mold closing, the first connecting pipe 27 and the second connecting pipe 28 are brought closer to each other. When the inserting pipe 32 is driven by the first connecting pipe 27 to insert into the inserting slot 31, the inserting pipe 32 and the inserting slot 31 are sealed by the second sealing ring 33. As the inserting pipe 32 is inserted, the ejector rod 39 passes through the water through-channel 41 and then abuts against the sealing plug 45, so that the sealing plug 45 moves away from the water through-channel 41 against the elastic force of the second spring 46. After the water through-channel 41 is opened, the cooling water can enter the second connecting pipe 28 through the inserting pipe 32. When the inserting pipe 32 is continuously inserted, the sealing plug 45 drives the piston 37 to move against the elastic force of the first spring 38 through the ejector rod 39. When the piston 37 is misaligned with the second water pipe 30, the cooling water can enter the internal cooling channels of the moving die 9 through the second water pipe 30, so that the internal cooling channels of the fixed die 8 and the moving die 9 can be automatically connected when the mold is closed, and the cooling water can flow normally. When the mold is opened, the piston 37 and the sealing plug 45 are driven by the first spring 38 and the second spring 46 to reset. After the sealing plug 45 abuts against the water through-channel 41, the cooling water inside the opened fixed die 8 stops flowing, while the cooling water inside the moving die 9 continues to flow due to gravity and flows back to the cooling water tank 24 through the return structure. At the same time, the piston 37 moves to the left side of the second water pipe 30 through reset. The right side of the piston 37 is hermetically matched with the first guide rod 35 through the first guide rod groove 34, avoiding the backflow of the cooling water and overflow. When the fixed die 8 and the moving die 9 are opened, the flow of the cooling water can be automatically stopped. Through this cooling channel on-off mechanism, the flow and cut-off of the cooling water can be automatically controlled according to the mold closing and opening states of the mold.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blow mold coolant circulation device, comprising a base (1), characterized in that: The four corners of the bottom of the base (1) are symmetrically mounted with legs (2), and a support (3) is mounted in the middle of the top of the base (1), wherein: A workbench (4) is rotatably connected to the top of the pillar (3), and the workbench (4) is driven to rotate by a driving mechanism. Fixed molds (8) are symmetrically installed on the top of four sides of the workbench (4). A movable mold (9) is arranged on the outside of the workbench (4) close to the fixed mold (8). A support frame (10) is fixedly connected to the top of the workbench (4) corresponding to the outside of the movable mold (9). An electric telescopic rod (11) is installed on the support frame (10), and the telescopic end of the electric telescopic rod (11) is fixedly connected to the movable mold (9). A first annular groove (12) and a second annular groove (13) are respectively provided on the outside of the upper and lower sides of the pillar (3). The pillar (3) is rotatably connected to the outside of the first annular groove (12) and the second annular groove (13). The first annular tube (14) and the second annular tube (15) are both sleeved on the outside of the pillar (3) through the pillar groove (16), and the inner wall of the pillar groove (16) is installed with a first sealing ring (17); The first annular tube (14) and the second annular tube (15) are fixedly connected via a first connecting rod (18); the first annular tube (14) is fixedly connected to the workbench (4) via a second connecting rod (19); the bottom of the fixed mold (8) is connected to the first annular tube (14) via a water inlet pipe (20); the movable mold (9) is connected to the second annular tube (15) via a return pipe (21); the support (3) is provided with a water inlet groove (22) and a return groove (23) respectively inside the first annular groove (12) and the second annular groove (13); a cooling water tank (24) is provided below the base (1); the cooling water tank (24) is connected to the water inlet groove (22) and the return groove (23) respectively via a first connecting pipe (25) and a second connecting pipe (26); and cooling channel on-off mechanisms are provided at the tops of the fixed mold (8) and the movable mold (9) for controlling the on-off of cooling channels inside the fixed mold (8) and the movable mold (9).

2. The blow mold coolant circulation device according to claim 1, characterized in that: The driving mechanism comprises a motor (5), the motor (5) being mounted on the top of the pillar (3), a ring gear (6) being mounted on the top of the workbench (4) close to the ring side of the pillar (3), and a reversing gear (7) meshing with the ring gear (6) being fixedly connected to the shaft end of the motor (5) corresponding to the ring gear (6).

3. The blow mold coolant circulation device according to claim 1, characterized in that: A connecting groove (48) is provided at the top of the workbench (4) corresponding to the movable mold (9), and a return pipe (21) at the bottom of the movable mold (9) passes through the interior of the workbench (4) through the connecting groove (48).

4. The blow mold coolant circulation device according to claim 1, characterized in that: The fixed mold (8) and the movable mold (9) are both provided with cooling channels inside, and the cooling channels of the fixed mold (8) and the movable mold (9) are respectively connected to the water inlet pipe (20) and the return pipe (21).

5. The blow mold coolant circulation device according to claim 1, characterized in that: The cooling channel on-off mechanism comprises a first connecting pipe (27). The tops of the fixed mold (8) and the movable mold (9) are respectively provided with the first connecting pipe (27) and the second connecting pipe (28). The first connecting pipe (27) is connected to the cooling channel inside the fixed mold (8) through a first water pipe (29). The second connecting pipe (28) is connected to the cooling channel inside the movable mold (9) through a second water pipe (30). The second connecting pipe (28) is provided with a slot (31) at one end close to the first connecting pipe (27). An insert pipe (32) is connected to one end of the first connecting pipe (27) corresponding to the slot (31). A second sealing ring (33) is installed on the inner wall of the slot (31). The second connecting pipe (28) is provided with a first guide rod slot (34) at one end away from the first connecting pipe (27). A first guide rod (35) runs through the first guide rod slot (34). The first guide rod (35) is fixedly connected to a baffle (36) at one end of the first guide rod (35) located outside the second connecting pipe (28). (35) is located in the second connecting tube (28) and one end thereof is fixedly connected to a piston (37). A first spring (38) is sleeved on the first guide rod (35) between the piston (37) and the first guide rod groove (34). An end of the piston (37) away from the first guide rod (35) is fixedly connected to a push rod (39). The inside of the insert tube (32) near the opening is fixedly connected to a fixing frame (40). A water groove (41) is passed through the middle of the fixing frame (40). The insert tube (32) near the middle is fixedly connected to a fixing frame (40). A fixing plate (42) is fixedly connected to the inner side of the fixing plate (42), a second guide rod groove (43) passes through the middle of the fixing plate (42), a second guide rod (44) passes through the interior of the second guide rod groove (43), a sealing plug (45) is fixedly connected to one end of the second guide rod (44) close to the water channel (41), a second spring (46) is sleeved on the second guide rod (44) between the sealing plug (45) and the fixing plate (42), and water holes (47) are equidistantly provided on the annular side of the fixing plate (42).

6. The blow mold coolant circulation device according to claim 5, characterized in that: The outer diameter of the piston (37) matches the inner diameter of the second connecting pipe (28).

7. The blow mold coolant circulation device according to claim 5, characterized in that: The push rod (39) is a cylinder, and the outer diameter of the push rod (39) is smaller than the inner diameter of the water channel (41).

8. The blow mold coolant circulation device according to claim 5, characterized in that: The outer diameter of the sealing plug (45) is greater than the inner diameter of the water channel (41), and the sealing plug (45) is elastically connected to the fixing plate (42) via a second spring (46).

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