High-precision blowing mechanism of hollow blowing mold

Abstract

The invention discloses a high-precision hollow blowing mold blowing mechanism which comprises a bearing frame, and an air compressor, a PLC (programmable logic controller), a fixing frame and a compressed gas quantitative storage tank are sequentially mounted in the bearing frame. By installing the filtering and purifying cylinder and the like, when the device is used, the air compressor is started, and air in the external environment passes through the filtering and purifying cylinder in advance and then enters the air compressor to be compressed; large-particle impurities in the air can be filtered out through the stainless steel filter screen nozzle in sequence in the filtering and purifying barrel, suspended solids, fibers and the like in the air are adsorbed and filtered out through the activated carbon filtering layer in the filtering and purifying barrel, and therefore it can be guaranteed that compressed air obtained after the air enters the air compressor finally to be treated through the device is high in cleanliness and good in quality; the air compressor can be prevented from being blocked, and compressed gas blown into the hollow blow molding mold is less in impurity and does not pollute a product.

Description

Technical Field

[0001] The invention relates to the technical field of hollow blow molding molds, in particular to a high-precision hollow blow molding mold blowing mechanism. Background Art

[0002] Hollow blow molding molds can be used to manufacture hollow plastic products and are widely used in the production of various thin-shell hollow products, such as chemical and daily packaging containers, children's toys, etc. It puts the softened plastic blank into the mold cavity, and then introduces compressed air. The air pressure is used to deform the blank along the mold cavity to finally form the desired hollow product. The blowing mechanism is an important component on the hollow blow molding mold equipment for realizing the blowing function. However, there are still some defects in its actual use.

[0003] The blowing mechanism of the hollow blow molding mold often only compresses the external environment gas through compressed gas and then blows it directly into the hollow blow molding mold. This makes it difficult to control the amount of gas blown into the hollow mold, and it is also difficult to control the uniform blowing. This causes the plastic product to be prone to cracking or bulging due to excessive and uneven blowing, affecting the blow molding precision and product molding quality. In addition, the compressed gas blown in will be mixed with some impurities, which will contaminate the plastic product that is finally cooled and molded. Based on this, we propose a new type of high-precision hollow blow molding mold blowing mechanism. Summary of the invention

[0004] The object of the present invention is to provide a high-precision hollow blow mold blowing mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision hollow blow molding mold blowing mechanism, comprising a carrier, an air compressor, a PLC controller, a fixed frame and a compressed gas quantitative storage tank are installed in sequence inside the carrier, stepper motors are fixed at both ends of the fixed frame, a screw rod is connected between the output end of the stepper motor and the fixed frame, a nut seat is threadedly sleeved on the screw rod, an outer dust cover slidably connected to the compressed gas quantitative storage tank is welded between adjacent nut seats, a piston rod is arranged at the middle position of the top end of the outer dust cover, a piston member that fits the inner wall of the compressed gas quantitative storage tank is arranged at the bottom of the piston rod, an air supply reserved pipe, an air pressure sensor and an air blowing reserved pipe are welded to the bottom of the compressed gas quantitative storage tank in sequence, and solenoid valves are installed on the air supply reserved pipe and the air blowing reserved pipe, a filter purification cartridge is installed at one end of the air compressor, a threaded vertical pipe is connected to the inner thread of the filter purification cartridge, and an activated carbon filter layer is arranged inside the filter purification cartridge.

[0006] Preferably, the fixing frame and the compressed gas quantitative storage tank are both welded to the supporting frame.

[0007] Preferably, the air compressor and the PLC controller are both fixedly installed by screws and a supporting frame.

[0008] Preferably, an assembly support is evenly welded on one end of the carrier frame, and fixing screw holes are evenly arranged on the assembly support, so that it is easy to fix the carrier frame at a suitable position of the production machine tool through screws.

[0009] Preferably, the top end of the air supply reserved pipe is connected to the output end of the air compressor.

[0010] Preferably, an air intake reserved pipe is provided at the input end of the air compressor.

[0011] Preferably, flanges are provided on both the air intake reserved pipe and the filter purification cartridge, and a disassembly and installation structure is formed between the air intake reserved pipe and the filter purification cartridge.

[0012] Preferably, a stainless steel filter nozzle is welded to the bottom of the threaded vertical pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The high-precision hollow blow molding mold blowing mechanism optimizes its own performance by installing a compressed gas quantitative storage tank, etc. On the one hand, the PLC controller controls the start of the air compressor and the opening of the solenoid valve on the air supply reserve pipe, which can supply the compressed gas to the inside of the compressed gas quantitative storage tank through the air supply reserve pipe. At the same time, the air pressure sensor monitors the air pressure value inside the compressed gas quantitative storage tank in real time and uploads it to the PLC controller for calculation and processing. When the preset installation value is reached, the PLC controller controls the air compressor and the solenoid valve on the air supply reserve pipe to close, and by controlling the air pressure value inside the compressed gas quantitative storage tank to determine the space, the storage amount of compressed gas can also be determined to achieve the advantage of quantitative gas supply. Subsequently, the two stepper motors are started, and the transmission function formed by the screw rod and the nut seat is cooperated to drive the outer dust cover to move evenly downward along the compressed gas quantitative storage tank, which can push the piston rod fixed on the outer dust cover to push the piston part below it to stick to the outer dust cover. As the inner wall of the compressed gas quantitative storage tank moves downward evenly, this can achieve the advantage of uniformly discharging the compressed gas inside the compressed gas quantitative storage tank, thereby facilitating the blowing reserved pipe to evenly blow the compressed gas into the hollow blow molding mold connected thereto, which achieves the advantage of uniform blowing, improves the quality of hollow blow molding, and avoids the problem of bulging or local damage of plastic products caused by uneven blowing. Moreover, each time the air is blown, the quantitative compressed gas that has been pre-stored in the compressed gas quantitative storage tank is introduced into the hollow blow molding mold, which enables the device to achieve the function of quantitative blowing, and then the device achieves high-precision hollow blow molding processing by controlling the amount of compressed gas and the blowing speed. On the other hand, an outer dust cover that is slidably connected to the compressed gas quantitative storage tank is provided on the piston rod to protect the piston rod, the piston parts and the inner wall of the compressed gas quantitative storage tank, which can seal and protect the piston structure, prevent dust from entering the compressed gas quantitative storage tank to cause pollution, and optimize the blowing quality.

[0014] (2) The blowing mechanism of the high-precision hollow blow molding mold is equipped with a stainless steel filter mouth, etc., so that when the device is in operation, the air compressor is started and the gas from the external environment will pass through the filter purification cylinder in advance before entering the air compressor for compression processing. The gas will pass through the stainless steel filter mouth in the filter purification cylinder to filter out large particles of impurities, and the activated carbon filter layer inside the filter purification cylinder will absorb and filter out suspended matter and fibers in the air. This allows the device to ensure that the compressed gas finally entering the air compressor for processing is high in cleanliness and quality, which can not only avoid the air compressor from being blocked, but also ensure that the compressed gas blown into the hollow blow molding mold has few impurities and will not contaminate the product, thereby improving the quality of the product obtained from the subsequent blow molding process.

[0015] (3) The blowing mechanism of the high-precision hollow blow molding mold is installed with an activated carbon filter layer, etc., so that the device optimizes its own structure. On the one hand, a threaded vertical pipe is connected to the internal thread of the filter purification cartridge, an activated carbon filter layer is arranged inside the filter purification cartridge, and a stainless steel filter mouth is welded at the bottom of the threaded vertical pipe. The threaded installation structure makes it easy to disassemble and clean the filter purification structure independently. On the other hand, flanges are arranged on both the air intake reserved pipe and the filter purification cartridge, which facilitates the disassembly and installation of the air intake reserved pipe and the filter purification cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the present invention.

[0017] Figure 2 It is a side view structural schematic diagram of the present invention.

[0018] Figure 3 It is a schematic diagram of the side cross-sectional structure of the outer dust cover of the present invention.

[0019] Figure 4 It is a front view structural schematic diagram of the filter purification cartridge of the present invention in a disassembled state.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the threaded vertical pipe of the present invention from top view.

[0021] Figure 6 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1. Intake reserve pipe; 2. Assembly support; 3. Carrier; 4. PLC controller; 5. Air compressor; 6. Filter purification cartridge; 7. Compressed gas quantitative storage tank; 8. Air supply reserve pipe; 9. Air pressure sensor; 10. Solenoid valve; 11. Blow reserve pipe; 12. Fixed bracket; 13. External dust cover; 14. Screw; 15. Stepper motor; 16. Nut seat; 17. Piston rod; 18. Piston member; 19. Threaded vertical pipe; 20. Flange; 21. Stainless steel filter mouth; 22. Activated carbon filter layer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-6, an embodiment of the present invention: a high-precision hollow blow molding mold blowing mechanism, including a carrier 3, an air compressor 5, a PLC controller 4, a fixed frame 12 and a compressed gas quantitative storage tank 7 are installed in sequence inside the carrier 3; a stepper motor 15 is fixed at both ends inside the fixed frame 12, a screw rod 14 is connected between the output end of the stepper motor 15 and the fixed frame 12, a nut seat 16 is threadedly sleeved on the screw rod 14, and an outer dust cover 13 slidably connected to the compressed gas quantitative storage tank 7 is welded between adjacent nut seats 16; a piston rod 17 is arranged at the middle position of the top end inside the outer dust cover 13, a piston member 18 is arranged at the bottom of the piston rod 17 and is in contact with the inner wall of the compressed gas quantitative storage tank 7, and a gas supply reserved pipe 8, an air pressure sensor 9 and a blow reserved pipe 11 are welded to the bottom of the compressed gas quantitative storage tank 7 in sequence; a solenoid valve 10 is installed on the gas supply reserved pipe 8 and the blow reserved pipe 11.

[0025] The PLC controller 4 controls the start-up of the air compressor 5 and the opening of the solenoid valve 10 on the air supply reservation pipe 8, which can supply the compressed gas to the interior of the compressed gas quantitative storage tank 7 through the air supply reservation pipe 8. At the same time, the air pressure sensor 9 will monitor the air pressure value inside the compressed gas quantitative storage tank 7 in real time and upload it to the PLC controller 4 for calculation and processing. When the preset installation value is reached, the PLC controller 4 controls the air compressor 5 and the solenoid valve 10 on the air supply reservation pipe 8 to close, and by controlling the air pressure value inside the determined space of the compressed gas quantitative storage tank 7, the storage amount of the compressed gas can also be determined, thereby achieving the advantage of quantitative gas supply.

[0026] Subsequently, the two stepper motors 15 are started, and the transmission function formed by the screw rod 14 and the nut seat 16 is cooperated to drive the outer dust cover 13 to move downward evenly along the compressed gas quantitative storage tank 7, which can push the piston rod 17 fixed on the outer dust cover 13 to push the piston member 18 below it to move downward evenly along the inner wall of the compressed gas quantitative storage tank 7, which can achieve the advantage of uniformly discharging the compressed gas inside the compressed gas quantitative storage tank 7, so that it is convenient for the blowing reserved pipe 11 to evenly blow the compressed gas into the hollow blow molding mold connected to it, which achieves the advantage of uniform blowing, improves the quality of hollow blow molding, and avoids the problem of bulging or local damage of plastic products caused by uneven blowing. In addition, each time the air is blown, the quantitative compressed gas that has been pre-stored in the compressed gas quantitative storage tank 7 is introduced into the hollow blow molding mold, which enables the device to achieve the effect of quantitative blowing, and then the device realizes high-precision hollow blow molding by controlling the amount of compressed gas and the blowing speed.

[0027] A filter purification cartridge 6 is installed at one end of the air compressor 5 , and a threaded vertical pipe 19 is connected to the internal thread of the filter purification cartridge 6 , and an activated carbon filter layer 22 is arranged inside the filter purification cartridge 6 ; a stainless steel filter mouth 21 is welded to the bottom of the threaded vertical pipe 19 .

[0028] When the air compressor 5 is started, the gas from the external environment will pass through the filter purification cartridge 6 in advance and then enter the interior of the air compressor 5 for compression processing. The gas will pass through the stainless steel filter mouth 21 in the filter purification cartridge 6 to filter out large particles of impurities, and the activated carbon filter layer 22 inside the filter purification cartridge 6 will absorb and filter out suspended matter and fibers in the air. This allows the device to ensure that the compressed gas finally entering the air compressor 5 for processing has high cleanliness and good quality, which can not only avoid the air compressor 5 from being blocked, but also ensure that the compressed gas blown into the hollow blow molding mold has few impurities and will not contaminate the product, thereby improving the quality of the product obtained by subsequent blow molding processing; the fixing frame 12 and the compressed gas quantitative storage tank 7 are both welded to the support frame 3; the air compressor 5 and the PLC controller 4 are both fixedly installed by screws and the support frame 3.

[0029] An assembly support 2 is evenly welded to one end of the carrier frame 3, and fixing screw holes are evenly arranged on the assembly support 2, so that it is convenient to fix the carrier frame 3 at a suitable position of the production machine tool through screws; the top of the air supply reserved pipe 8 is connected to the output end of the air compressor 5; the input end of the air compressor 5 is provided with an air intake reserved pipe 1; the air intake reserved pipe 1 and the filter purification cartridge 6 are both provided with a flange 20, and a disassembly and installation structure is formed between the air intake reserved pipe 1 and the filter purification cartridge 6.

[0030] The working principle of this equipment is that first, the user can use the assembly support 2 and the fixing screw holes set thereon to fix the support frame 3 at a suitable position of the production machine tool through screws. Then, the air compressor 5 is started, and the gas in the external environment will pass through the filter purification cylinder 6 in advance and then enter the interior of the air compressor 5 for compression treatment. The gas will pass through the stainless steel filter mouth 21 inside the filter purification cylinder 6 to filter out large particles of impurities, and the activated carbon filter layer 22 inside the filter purification cylinder 6 will absorb and filter out suspended matter and fibers in the air. This allows the device to ensure that the compressed gas finally entering the air compressor 5 for processing has high cleanliness and good quality, which can not only avoid the air compressor 5 from being blocked, but also ensure that the compressed gas blown into the hollow blow molding mold has few impurities and will not contaminate the product, thereby improving the quality of the product obtained by subsequent blow molding processing.

[0031] During actual operation, the PLC controller 4 controls the air compressor 5 to start and the solenoid valve 10 on the air supply reservation pipe 8 to open, which can supply the compressed gas to the interior of the compressed gas quantitative storage tank 7 through the air supply reservation pipe 8. At the same time, the air pressure sensor 9 will monitor the air pressure value inside the compressed gas quantitative storage tank 7 in real time and upload it to the PLC controller 4 for calculation and processing. When the preset installation value is reached, the PLC controller 4 controls the air compressor 5 and the solenoid valve 10 on the air supply reservation pipe 8 to close, and by controlling the air pressure value inside the determined space of the compressed gas quantitative storage tank 7, the storage amount of the compressed gas can also be determined, thereby achieving the advantage of quantitative gas supply.

[0032] Subsequently, the two stepper motors 15 are started, and the transmission function formed by the screw rod 14 and the nut seat 16 is cooperated to drive the outer dust cover 13 to move downward evenly along the compressed gas quantitative storage tank 7, which can push the piston rod 17 fixed on the outer dust cover 13 to push the piston member 18 below it to move downward evenly along the inner wall of the compressed gas quantitative storage tank 7, which can achieve the advantage of uniformly discharging the compressed gas inside the compressed gas quantitative storage tank 7, so that it is convenient for the blowing reserved pipe 11 to evenly blow the compressed gas into the hollow blow molding mold connected to it, which achieves the advantage of uniform blowing, improves the quality of hollow blow molding, and avoids the problem of bulging or local damage of plastic products caused by uneven blowing.

[0033] Each time blowing is performed, a quantitative compressed gas that has been pre-stored in the compressed gas quantitative storage tank 7 is introduced into the hollow blow molding mold, which enables the device to achieve the function of quantitative blowing, and then the device realizes high-precision hollow blow molding by controlling the amount of compressed gas and the blowing speed. In addition, an outer dust cover 13 that is slidably connected to the compressed gas quantitative storage tank 7 is provided on the piston rod 17 to protect the piston rod 17, the piston member 18 and the inner wall of the compressed gas quantitative storage tank 7. This can seal and protect the piston structure, prevent dust from entering the compressed gas quantitative storage tank 7 and causing pollution, and optimize the blowing quality.

Claims

1. A high-precision hollow blow molding mold blowing mechanism, characterized in that: The invention comprises a support frame (3), wherein an air compressor (5), a PLC controller (4), a fixing frame (12) and a compressed gas quantitative storage tank (7) are sequentially installed inside the support frame (3), a stepping motor (15) is fixed at both ends inside the fixing frame (12), a screw rod (14) is connected between the output end of the stepping motor (15) and the fixing frame (12), a nut seat (16) is threadedly sleeved on the screw rod (14), an outer dust cover (13) slidably connected to the compressed gas quantitative storage tank (7) is welded between adjacent nut seats (16), and the outer dust cover (13) is welded between the adjacent nut seats (16), and the outer dust cover (13) is welded between the adjacent nut seats (16). 3) A piston rod (17) is provided at the middle position of the internal top end, and a piston member (18) is provided at the bottom of the piston rod (17) and is fitted with the inner wall of the compressed gas quantitative storage tank (7). A gas supply reserved pipe (8), an air pressure sensor (9) and a blow reserve pipe (11) are welded to the bottom of the compressed gas quantitative storage tank (7) in sequence, and a solenoid valve (10) is installed on both the gas supply reserved pipe (8) and the blow reserve pipe (11). A filter purification cartridge (6) is installed at one end of the air compressor (5), and a threaded vertical pipe (19) is connected to the internal thread of the filter purification cartridge (6).

2. A high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: An activated carbon filter layer (22) is provided inside the filtering and purifying cartridge (6).

3. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: The fixing frame (12) and the compressed gas quantitative storage tank (7) are both welded to the supporting frame (3).

4. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: The air compressor (5) and the PLC controller (4) are both fixedly installed by means of screws and a supporting frame (3).

5. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: An assembly support (2) is uniformly welded to one end of the bearing frame (3), and fixing screw holes are uniformly arranged on the assembly support (2).

6. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: The top end of the air supply reserve pipe (8) is connected to the output end of the air compressor (5).

7. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: An air intake reserve pipe (1) is provided at the input end of the air compressor (5).

8. The high-precision hollow blow molding mold blowing mechanism according to claim 7, characterized in that: The air intake reserve pipe (1) and the filter purification cartridge (6) are both provided with flanges (20), and a disassembly and installation structure is formed between the air intake reserve pipe (1) and the filter purification cartridge (6).

9. The high-precision hollow blow molding mold blowing mechanism according to claim 1, characterized in that: A stainless steel filter mouth (21) is welded to the bottom of the threaded vertical pipe (19).

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