Blow molding cooling device of blow molding machine

Abstract

The invention relates to the technical field of blow molding processing equipment, in particular to a blow molding machine blow molding forming cooling device which comprises a blow molding machine body, a forming mold, a plastic moving mechanism, a transmission lead screw, a sliding frame, a clamping mechanism, a cooling mechanism, a telescopic sleeve rod, a clamping arm, a sliding block, a cooling air pipe, a V-shaped groove, a meshing rack and a cut-off tool. When a plastic part is demoulded, a fan connected with a cooling air pipe mounted at the lower end of a sliding block is started, low-temperature compressed gas is blown out from the cooling air pipe which is obliquely arranged downwards to the direction of the plastic part, and the blowing-out process is continuously carried out in the subsequent backward moving process of a clamping arm; therefore, the plastic part clamped by the lower ends of the clamping arms can be continuously cooled, and the problem of insufficient cooling possibly existing on the surface of the plastic part or part of positions with complex structures is solved.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding equipment, in particular to a blow molding cooling device for a blow molding machine. Background Art

[0002] Blow molding, also known as blow molding, is a process that uses an extruder to heat thermoplastics to a molten state, and then extrude the molten plastic through the extruder head to form a hollow tubular parison. The extruded parison is immediately clamped between the molding molds. Then, compressed air is blown into the parison to expand the parison and fit the inner wall of the mold, thereby forming the desired product shape. In recent years, the blow molding process has gradually occupied an important position in the plastic products industry with its ability to quickly and mass-produce high-quality plastic products of various shapes and specifications at a low production cost, and is an indispensable part of modern manufacturing.

[0003] After the plastic product is blow-molded in the mold, it is still in a high temperature state, so it needs to be cooled to stabilize the shape of the product. In order to fully cool the product, after the blow molding is completed in the mold, the plastic product is usually first cooled for the first time by the cooling water introduced into the water cooling channel designed inside the mold to remove some of the heat; then the mold is opened, and the plastic product that still has some heat and has not been fully formed is demolded and falls from the molding mold onto the stage, and is cooled for the second time on the stage by air cooling, water cooling or natural cooling, so that the temperature of the plastic product is reduced and the shape is completely fixed.

[0004] During the above process, between the first cooling and the second cooling, when the plastic product falls off from the mold, the shape of the plastic product has not been fully determined at this time, especially for some plastic products with larger volume or more complex shape, the cooling water channel inside the mold is difficult to fully cool them. As a result, these plastic products still have high heat in some areas when they fall from the mold. Therefore, when they fall directly from the mold to the lower loading platform, they are prone to collision and deformation, which affects the product quality and is not conducive to the company's production and operation.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes a blow molding cooling device for a blow molding machine. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problem is: a blow molding cooling device for a blow molding machine according to the present invention comprises:

[0007] A blow molding machine body, wherein an extruder is installed at the upper end of the blow molding machine body, and a molding die is also installed at a position below the head of the extruder;

[0008] Also includes:

[0009] A plastic transfer mechanism, which is installed on the main body of the blow molding machine and is located on one side of the molding die; the plastic transfer mechanism includes:

[0010] A fixing frame, wherein the fixing frame is fixedly connected to the blow molding machine body through a connecting column;

[0011] Transmission screws, two horizontally placed transmission screws are rotatably connected to the lower end of the fixed frame, and the driving motor of the transmission screws is fixedly connected to one end of the fixed frame;

[0012] A sliding frame, wherein the sliding frame is sleeved on two driving screws and moves linearly along the driving screws as the driving screws rotate;

[0013] A clamping mechanism, which is installed below the sliding frame and is used to clamp the blow-molded plastic part from the molding mold and remove it from the molding mold;

[0014] The cooling mechanism is sleeved on the end of the driving screw which is farther away from the forming mold than the sliding frame, and the clamping mechanism is connected to the cooling mechanism through a telescopic sleeve rod.

[0015] Preferably, the sliding frame is in an inverted "U" shape, and the clamping mechanism comprises:

[0016] Reciprocating rods, two of which are horizontally fixedly connected to the inner side wall of the lower end of the sliding frame;

[0017] The clamping arms are installed in pairs, and one end of the clamping arms away from the forming mold is provided with a through slot, and the clamping arms are sleeved on the reciprocating rod through the through slot and are slidably connected with the reciprocating rod; the end of the clamping arms close to the forming mold is located between the extruder and the forming mold in terms of vertical height;

[0018] The control groove is arranged on the outer side wall of the clamping arm away from the end of the forming mold, and the control groove is used to cooperate with the cooling mechanism to control the opening and closing of the clamping arm.

[0019] Preferably, the cooling mechanism comprises:

[0020] A sliding block, the sliding block is sleeved on the two driving screws, and the sliding block is installed at an end of the driving screw that is farther away from the molding die than the sliding frame;

[0021] A V-shaped groove, which is formed at the front end of the sliding block and matches with the clamping arm having the control groove formed therein;

[0022] The cooling air duct is evenly and fixedly connected to the side wall of the lower end of the sliding block, and low-temperature compressed gas is sprayed outward from the cooling air duct.

[0023] Preferably, a limiting groove is provided at the bottom of the crossbeam of the fixed frame, and the top ends of the sliding frame and the sliding block both extend into the limiting groove and slide in cooperation with the fixed frame.

[0024] Preferably, both ends of the transmission screw are provided with narrow diameter non-threaded shaft sections, and the length of the non-threaded shaft section near the sliding frame end is less than the width of the sliding frame, and the length of the non-threaded shaft section near the sliding block end is greater than the width of the sliding block.

[0025] Preferably, the through groove is a stepped groove, and a compression spring is fixedly connected in the wider groove section of the through groove; a wedge-shaped block is elastically installed on the side wall at one end of the clamping arm where the control groove is located, and a wedge-shaped groove matching the wedge-shaped block is provided on the inner side wall where the sliding block has a V-shaped groove.

[0026] Preferably, the wedge-shaped clamping block is installed on the clamping arm through an electric spring rod, and the power switch of the electric spring rod is fixedly installed at the bottom of the fixing frame and at a position corresponding to the longer non-threaded shaft section of the transmission screw.

[0027] Preferably, an engaging rack is fixedly connected to the inner side of one end of the clamping arm close to the forming mold, and the engaging rack is made of high-temperature resistant rubber material; a cutting knife is also fixedly connected to the upper end of the engaging rack.

[0028] Preferably, the terminal pipe of the cooling air duct is arranged to be inclined downward.

[0029] Preferably, a loading platform located below the fixing frame is fixedly installed on one side of the blow molding machine body, and the height of the loading platform is 2-5 cm lower than the position of the cavity in the molding mold.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. When the plastic part is demoulded, the fan connected to the cooling air duct installed at the lower end of the sliding block is started, and low-temperature compressed gas is blown toward the plastic part from the cooling air duct arranged obliquely downward, and the blowing process continues during the subsequent backward movement of the clamping arm, thereby playing a role in continuously cooling the plastic part clamped at the lower end of the clamping arm, avoiding the problem of insufficient cooling that may exist on the surface of the plastic part or some parts with complex structures.

[0032] 2. Under the elastic force of the compression spring, the V-groove and the control groove are quickly separated, and the sliding block moves backward along the non-threaded shaft section of the transmission screw, thereby opening the clamping arm, so that the plastic part falls from the clamping arm to the loading platform; because during the entire clamping process of the clamping arm, the cooling air duct always cools the plastic part, and the height of the loading platform is only 2-5cm lower than the position of the cavity in the molding mold, the falling distance is short, which further ensures that the blow-molded plastic parts will not be deformed when falling due to insufficient cooling for the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a three-dimensional structural schematic diagram of the plastic transfer mechanism and its related structures of the present invention;

[0036] Figure 3 It is a partial structural cross-sectional view of the plastic transfer mechanism and its related structures of the present invention;

[0037] Figure 4 It is a three-dimensional structural schematic diagram of the clamping mechanism and the cooling mechanism of the present invention;

[0038] Figure 5 yes Figure 4 Enlarged view of point A.

[0039] In the figure: 1. Blow molding machine body; 2. Extruder; 3. Molding mold; 4. Plastic transfer mechanism; 5. Fixed frame; 6. Connecting column; 7. Transmission screw; 8. Driving motor; 9. Sliding frame; 10. Clamping mechanism; 11. Cooling mechanism; 12. Telescopic sleeve; 13. Reciprocating rod; 14. Clamping arm; 15. Through slot; 16. Control slot; 17. Sliding block; 18. V-shaped slot; 19. Cooling air duct; 20. Limiting slot; 21. Compression spring; 22. Wedge-shaped block; 23. Wedge-shaped slot; 24. Power switch; 25. Engaging rack; 26. Cutting knife; 27. Loading table. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0041] like Figures 1 to 5 As shown, the present invention provides a blow molding cooling device for a blow molding machine, comprising:

[0042] A blow molding machine body 1, wherein an extruder 2 is installed at the upper end of the blow molding machine body 1, and a molding die 3 is also installed at a position below the head of the extruder 2 of the blow molding machine body 1;

[0043] Also includes:

[0044] The plastic transfer mechanism 4 is installed on the blow molding machine body 1 and is located on one side of the molding die 3; the plastic transfer mechanism 4 includes:

[0045] A fixing frame 5, wherein the fixing frame 5 is fixedly connected to the blow molding machine body 1 through a connecting column 6;

[0046] Transmission screw 7, two horizontally placed transmission screws 7 are rotatably connected to the lower end of the fixed frame 5, and a driving motor 8 of the transmission screw 7 is fixedly connected to one end of the fixed frame 5;

[0047] A sliding frame 9, wherein the sliding frame 9 is sleeved on the two driving screws 7 and moves linearly along the driving screws 7 as the driving screws 7 rotate;

[0048] A clamping mechanism 10, which is installed below the sliding frame 9 and is used to clamp the blow-molded plastic part from the molding die 3 and remove it from the molding die 3;

[0049] The cooling mechanism 11 is sleeved on the end of the driving screw 7 which is farther away from the molding die 3 than the sliding frame 9 . The clamping mechanism 10 is connected to the cooling mechanism 11 via a telescopic sleeve rod 12 .

[0050] As an embodiment of the present invention, the sliding frame 9 is an inverted "U" shape, and the clamping mechanism 10 includes:

[0051] Reciprocating rods 13, two reciprocating rods 13 are horizontally fixedly connected to the inner side wall of the lower end of the sliding frame 9;

[0052] The clamping arms 14 are installed in pairs, and a through slot 15 is provided at one end of the clamping arms 14 away from the molding die 3. The clamping arms 14 are sleeved on the reciprocating rod 13 through the through slot 15 and are slidably connected to the reciprocating rod 13. The end of the clamping arms 14 close to the molding die 3 is located between the extruder 2 and the molding die 3 in terms of vertical height.

[0053] The control groove 16 is formed on the outer wall of the clamping arm 14 at one end away from the molding die 3 . The control groove 16 is used to cooperate with the cooling mechanism 11 to control the opening and closing of the clamping arm 14 .

[0054] As an embodiment of the present invention, the cooling mechanism 11 includes:

[0055] A sliding block 17, wherein the sliding block 17 is sleeved on the two driving screws 7, and the sliding block 17 is installed at an end of the driving screw 7 away from the molding die 3 compared to the sliding frame 9;

[0056] A V-shaped groove 18, which is formed at the front end of the sliding block 17 and matches with the clamping arm 14 formed with the control groove 16;

[0057] The cooling air duct 19 is evenly and fixedly connected to the side wall of the lower end of the sliding block 17, and the cooling air duct 19 sprays low-temperature compressed gas outward.

[0058] As an embodiment of the present invention, a bite rack 25 is fixedly connected to the inner side of one end of the clamping arm 14 close to the molding die 3, and the bite rack 25 is made of high temperature resistant rubber material; a cutting knife 26 is also fixedly connected to the upper end of the bite rack 25.

[0059] As an embodiment of the present invention, the terminal pipe of the cooling air duct 19 is arranged to be inclined downward.

[0060] During the blow molding process of plastic products, the extruder 2 at the upper end of the blow molding machine body 1 heats the plastic granular raw material to a molten state, and then extrude the tubular parison from the head to the molding mold 3. The molding mold 3 shrinks and closes to clamp the tubular parison therein. After the blow molding of the plastic part is completed in the molding mold 3, the plastic transfer mechanism 4 is started: the drive motor 8 installed on the fixed frame 5 is started, driving the transmission screw 7 to rotate, so that the sliding frame 9 sleeved on the transmission screw 7 moves toward the direction close to the molding mold 3 with the rotation of the transmission screw 7, and the clamping mechanism 10 is installed below the sliding frame 9. Therefore, when the sliding frame 9 moves forward, the clamping arm 14 sleeved on the reciprocating rod 13 through the groove 15 also moves toward the direction close to the molding mold 3 until the sliding frame 9 moves to the end of the thread stroke of the transmission screw 7. At this time, the sliding frame 9 moves to the position closest to the molding mold 3, and the end of the clamping arm 14 installed on the sliding frame 9 close to the molding mold 3 has also moved between the head of the extruder 2 and the molding mold 3;

[0061] During the movement of the slide frame 9 and the clamping mechanism 10 toward the molding die 3, the cooling mechanism 11 which is also sleeved on the drive screw 7 also moves with the rotation of the drive screw 7 until the slide frame 9 moves to the position closest to the molding die 3. The slide frame 9 no longer moves on the drive screw 7, but the slide block 17 is still within the thread stroke of the drive screw 7, so it continues to move forward with the rotation of the drive screw 7. In the process of movement, the slide block 17 gradually approaches the slide frame 9 and the clamping arm 14, the telescopic sleeve gradually shrinks, and the slide block 17 is moved to the mold 3. The V-shaped groove 18 at the front end of 7 gradually approaches and matches with the control groove 16 opened on the outer side wall of the rear end of the clamping arm 14, and finally the two clamping arms 14 on the sliding frame 9 are gradually closed under the push of the V-shaped groove 18 on the sliding block 17, so that the inner side wall of the front end of the clamping arm 14 completes the clamping work of the tubular blank between the head of the extruder 2 and the forming mold 3; the inner side wall of the front end of the clamping arm 14 is fixedly connected with the left and right meshing meshing racks 25, and the meshing racks 25 made of high temperature resistant rubber material can enhance the clamping effect of the clamping arm 14 on the tubular blank, thereby avoiding The situation that the tubular preform accidentally falls off from the clamping arm 14 due to unstable clamping is avoided; a cutting knife 26 is fixedly connected to the top of the engaging rack 25, so that when the clamping arm 14 clamps the tubular preform above the plastic part, the cutting knife 26 can also cut and separate the tubular preform extruded by the extruder 2 from the formed plastic part, thereby facilitating the blow molding of the next plastic part; during the movement of the above-mentioned sliding frame 9, the cooling water channel in the molding mold 3 has completed the first cooling work of the plastic part, and the sliding block 17 is also in the rotation of the transmission screw 7. When the sliding block 17 is in motion, it moves to the position closest to the plastic part. At this time, the driving motor 8 is turned off, the molding mold 3 is opened, and when the plastic part is demoulded, the fan connected to the cooling air duct 19 installed at the lower end of the sliding block 17 is started, and low-temperature compressed gas is blown toward the plastic part from the cooling air duct 19 arranged obliquely downward, and the blowing process continues during the subsequent backward movement of the clamping arm 14, thereby playing a role in continuously cooling the plastic part clamped at the lower end of the clamping arm 14, avoiding the problem of insufficient cooling that may exist on the surface of the plastic part or in some parts with complex structures.

[0062] As an implementation mode of the present invention, a limiting groove 20 is provided at the bottom of the crossbeam of the fixing frame 5 , and the top ends of the sliding frame 9 and the sliding block 17 both extend into the limiting groove 20 and slide in cooperation with the fixing frame 5 .

[0063] During operation, a limit groove 20 is provided at the bottom of the crossbeam of the fixed frame 5 to cooperate with the sliding frame 9 and the top limit of the sliding block 17, so that the sliding block 17 and the sliding frame 9 can be supported by the transmission screw 7 and the fixed frame 5 during the process of linear motion with the rotation of the transmission screw 7, thereby ensuring that the clamping mechanism 10 and the cooling mechanism 11 can maintain stable operation during the entire working process.

[0064] As an embodiment of the present invention, both ends of the transmission screw 7 are provided with narrow-diameter unthreaded shaft sections, and the length of the unthreaded shaft section close to the sliding frame 9 is less than the width of the sliding frame 9, and the length of the unthreaded shaft section close to the sliding block 17 is greater than the width of the sliding block 17.

[0065] As an embodiment of the present invention, the through groove 15 is a stepped groove, and a compression spring 21 is fixedly connected in the wider groove section of the through groove 15; a wedge-shaped block 22 is elastically installed on the side wall of one end where the control groove 16 is located of the clamping arm 14, and a wedge-shaped groove 23 matching the wedge-shaped block 22 is provided on the inner side wall where the V-shaped groove 18 is provided on the sliding block 17.

[0066] As an embodiment of the present invention, the wedge-shaped block 22 is installed on the clamping arm 14 through an electric spring rod, and the power switch 24 of the electric spring rod is fixedly installed at the bottom of the fixing frame 5 and corresponding to the longer non-threaded shaft section of the transmission screw 7.

[0067] As an embodiment of the present invention, a loading platform 27 located below the fixing frame 5 is fixedly installed on one side of the blow molding machine body 1 , and the height of the loading platform 27 is 2-5 cm lower than the position of the cavity in the molding mold 3 .

[0068] During operation, when the clamping arm 14 clamps the tubular preform above the plastic part, the sliding frame 9 has moved to the position of the shorter non-threaded shaft section of the transmission screw 7 and no longer moves with the rotation of the transmission screw 7, while the sliding block 17 continues to gradually move toward the sliding frame 9, the telescopic sleeve continues to shrink, and the V-shaped groove 18 of the sliding block 17 gradually fits with the control groove 16 of the clamping arm 14. When the two clamping arms 14 are squeezed by the V-shaped groove 18 of the sliding block 17 and overcome the elastic force of the compression spring 21 installed on the groove 15, the clamping arm 14 completes the clamping. The tubular preform above the plastic part is clamped. At this time, the V-groove 18 and the control groove 16 are also completely fitted, and the wedge-shaped block 22 of the clamping arm 14 also extends into the wedge-shaped groove 23 of the inner wall of the sliding block 17, and the clamping arm 14 is engaged with the sliding block 17; after the plastic part is demoulded, the drive motor 8 is restarted to drive the transmission screw 7 to reverse. Since the sliding block 17 is still in the threaded shaft section of the transmission screw 7, the sliding block 17 will move away from the molding mold 3 with the reverse rotation of the transmission screw 7, and the sliding block 17 pulls the clamp due to the limiting effect of the wedge-shaped block 22. The holding arm 14 and the sliding frame 9 move in the opposite direction together. Since the wedge-shaped clamping block 22 is always engaged with the wedge-shaped groove 23 during the reverse movement, the clamping arm 14 also maintains the clamping state, thereby taking the plastic part out of the molding die 3, until the sliding block 17 moves to the non-threaded shaft section at the end of the transmission screw 7, and the sliding block 17 triggers the power switch 24 of the electric spring rod. The electric spring rod is energized and retracted, and the wedge-shaped clamping block 22 withdraws from the wedge groove 23 together. The limiting effect of the wedge-shaped clamping block 22 on the sliding block 17 disappears. Under the elastic force of the compression spring 21, the plastic part is taken out of the molding die 3. Under the action, the V-groove 18 is quickly separated from the control groove 16, and the sliding block 17 moves backward along the non-threaded shaft section of the transmission screw 7, thereby opening the clamping arm 14, so that the plastic part falls from the clamping arm 14 to the loading platform 27; because during the entire clamping process of the clamping arm 14, the cooling air duct 19 always cools the plastic part, and the height of the loading platform 27 is only 2-5cm lower than the position of the cavity in the molding mold 3, the falling distance is short, which further ensures that the blow-molded plastic part will not be deformed when it falls due to insufficient cooling for the first time.

[0069] The above shows and describes the basic principles, main features and significant advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. Without departing from the spirit and scope of the present invention, the present invention may also be modified and improved to adapt to different usage environments and customer needs. These modifications and improvements fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A blow molding cooling device for a blow molding machine, comprising: A blow molding machine body (1), wherein an extruder (2) is mounted on the upper end of the blow molding machine body (1), and a molding die (3) is also mounted on the blow molding machine body (1) below the head of the extruder (2); It is characterized by further comprising: A plastic transfer mechanism (4), the plastic transfer mechanism (4) being mounted on a blow molding machine body (1), the plastic transfer mechanism (4) being located on one side of the molding die (3); the plastic transfer mechanism (4) comprising: A fixed frame (5), the fixed frame (5) being fixedly connected to the blow molding machine body (1) via a connecting column (6); A transmission screw (7), wherein two transmission screws (7) are placed horizontally and are rotatably connected to the lower end of the fixed frame (5), and a drive motor (8) of the transmission screw (7) is fixedly connected to one end of the fixed frame (5); A sliding frame (9), wherein the sliding frame (9) is sleeved on the two driving screws (7) and moves linearly along the driving screws (7) as the driving screws (7) rotate; A clamping mechanism (10), the clamping mechanism (10) being installed below the sliding frame (9), the clamping mechanism (10) being used to clamp the blow-molded plastic part from the molding mold (3) and remove it from the molding mold (3); A cooling mechanism (11), wherein the cooling mechanism (11) is sleeved on an end of the driving screw (7) that is farther from the molding die (3) than the sliding frame (9), and the clamping mechanism (10) and the cooling mechanism (11) are connected via a telescopic sleeve rod (12).

2. A blow molding cooling device for a blow molding machine according to claim 1, characterized in that: The sliding frame (9) is in an inverted "U" shape, and the clamping mechanism (10) comprises: Reciprocating rods (13), two reciprocating rods (13) being horizontally fixedly connected to the inner side wall of the lower end of the sliding frame (9); A clamping arm (14), wherein the clamping arm (14) is installed in pairs and has a through slot (15) at one end away from the molding die (3). The clamping arm (14) is sleeved on the reciprocating rod (13) through the through slot (15) and is slidably connected to the reciprocating rod (13); the end of the clamping arm (14) close to the molding die (3) is located between the extruder (2) and the molding die (3) in terms of vertical height; A control groove (16) is formed on an outer wall of the clamping arm (14) at one end away from the forming mold (3), and the control groove (16) is used to cooperate with the cooling mechanism (11) to control the opening and closing of the clamping arm (14).

3. A blow molding cooling device for a blow molding machine according to claim 2, characterized in that: The cooling mechanism (11) comprises: A sliding block (17), the sliding block (17) being sleeved on the two transmission screws (7), the sliding block (17) being installed at an end of the transmission screw (7) away from the molding die (3) compared to the sliding frame (9); A V-shaped groove (18), wherein the V-shaped groove (18) is formed at the front end of the sliding block (17), and the V-shaped groove (18) cooperates with the clamping arm (14) formed with the control groove (16); A cooling air duct (19), wherein the cooling air duct (19) is evenly and fixedly connected to the side wall of the lower end of the sliding block (17), and low-temperature compressed gas is ejected outward from the cooling air duct (19).

4. A blow molding cooling device for a blow molding machine according to claim 3, characterized in that: A limiting groove (20) is provided at the bottom of the crossbeam of the fixed frame (5), and the top ends of the sliding frame (9) and the sliding block (17) both extend into the limiting groove (20) and slide in cooperation with the fixed frame (5).

5. A blow molding cooling device for a blow molding machine according to claim 4, characterized in that: Both ends of the transmission screw (7) are provided with narrow-diameter non-threaded shaft sections, and the length of the non-threaded shaft section at the end close to the sliding frame (9) is less than the width of the sliding frame (9), and the length of the non-threaded shaft section at the end close to the sliding block (17) is greater than the width of the sliding block (17).

6. A blow molding cooling device for a blow molding machine according to claim 5, characterized in that: The through groove (15) is a stepped groove, and a compression spring (21) is fixedly connected in the wider groove section of the through groove (15); a wedge-shaped clamping block (22) is elastically mounted on the side wall of one end of the clamping arm (14) where the control groove (16) is located, and a wedge-shaped groove (23) matching with the wedge-shaped clamping block (22) is provided on the inner side wall of the sliding block (17) where the V-shaped groove (18) is provided.

7. A blow molding cooling device for a blow molding machine according to claim 6, characterized in that: The wedge-shaped clamping block (22) is mounted on the clamping arm (14) via an electric spring rod, and the power switch (24) of the electric spring rod is fixedly mounted at the bottom of the fixing frame (5) and at a position corresponding to the longer non-threaded shaft section of the transmission screw (7).

8. A blow molding cooling device for a blow molding machine according to claim 2, characterized in that: An engaging rack (25) is fixedly connected to the inner side of one end of the clamping arm (14) close to the forming mold (3), and the engaging rack (25) is made of a high-temperature resistant rubber material; a cutting knife (26) is also fixedly connected to the upper end of the engaging rack (25).

9. A blow molding cooling device for a blow molding machine according to claim 3, characterized in that: The terminal pipe of the cooling air pipe (19) is arranged to be inclined downward.

10. A blow molding cooling device for a blow molding machine according to claim 1, characterized in that: A loading platform (27) located below the fixing frame (5) is fixedly mounted on one side of the blow molding machine body (1), and the height of the loading platform (27) is 2-5 cm lower than the position of the middle cavity of the molding mold (3).

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