A gong mouth machine with belt cooling function

Abstract

The present invention provides a gong mouth machine with belt cooling function, which belongs to the technical field of blow molding processing equipment. The gong mouth machine includes a frame, a conveyor belt, a guide plate, a cutter and a guide belt. The guide belt is pulled by a driving wheel and a driven wheel. The driving wheel and the driven wheel are both rotatably connected to a mounting plate fixedly connected to the frame. The driving wheel is driven by a motor. A guide bar is fixedly arranged on the lower side of the mounting plate. The guide bar guides the straight section of the guide belt close to the cutter. The guide bar has a guide groove for allowing the guide belt to pass through. The guide bar also has a cooling liquid cavity. The gong mouth machine also includes a water conveying device for circulating low-temperature cooling liquid into the cooling liquid cavity. The present invention has the advantages of long belt service life and high cutting quality.

Description

Technical Field

[0001] The invention belongs to the technical field of blow molding processing equipment and relates to a blow molding machine with a belt cooling function. Background Art

[0002] During the production of plastic bottles, the injection molding machine processes plastic particles into a continuous tube, and then places the tube into a blow molding mold to form a bottle embryo. Since the tubular material used for blow molding is longer than the blow molding mold, excess material will be formed at both ends of the bottle embryo, commonly known as the "sprue". The gong mouth machine is a device that cuts off the excess material at the upper and lower ends of the bottle embryo. The gong mouth machine uses a belt to rotate and move the blank on the conveyor belt under a compressed state, so that the blank passes through a blade fixed on the frame under a composite motion of rotation and translation. The blade performs rotary cutting on the cutting position of the sprue to complete the removal of the blank sprue. Since the blank enters the gong mouth machine after blow molding, the blank contacts with the gong mouth machine belt at about 80°C. The temperature of the product sprue will be transmitted to the gong mouth machine belt, causing the belt temperature to increase. In addition, the belt itself heats up during operation, and the friction between the belt and the blank increases. Temperature, etc., will make the temperature of the belt in a "thermal expansion" state, which has the following adverse effects on the operation of the gong mouth machine and the product quality: 1. It accelerates the aging of the belt and shortens the service life of the belt; 2. It is frequently in a state of alternating thermal expansion and contraction (the belt returns to normal temperature when it is stopped, and rises to nearly 100°C when it is running). In addition to the accelerated aging of the rubber belt, it will also produce friction powder, which is a fatal defect of the dust-free workshop. In order to avoid the risk of foreign matter, technicians will be arranged to clean the dust every 2 hours during the production process, and the cleaning process also has certain safety hazards. (blade cuts, high temperature burns, etc.); 3. Since the role of the belt in the gong mouth machine is to drive the blank to rotate and translate, the running accuracy of the belt has a direct impact on the cutting accuracy of the product. The belt's own temperature fluctuations will inevitably cause fluctuations in tension and diameter (the cross-section of the belt is generally circular). In this way, the staff needs to adjust the tension of the belt appropriately according to the operation of the gong mouth machine, because the tension of the belt will change significantly at the beginning of the machine operation and after a period of operation, and the adjustment process is extremely cumbersome (because the actual need to adjust It is the pressing force between the belt and the blank. Therefore, in addition to the need to adjust the belt tension, the position of the pulley also needs to be adjusted to adapt to the diameter expansion of the belt caused by thermal expansion); 4. Several gong mouth machines are often set up in a single workshop, and they are all operated separately. There are differences in the operating time of each gong mouth machine, the specifications of the processed products, the materials of the products and other factors. Therefore, the heating condition of the gong mouth machine belt causes great inconvenience to management, and operations such as cleaning and replacement are difficult to carry out at an effective time, resulting in waste of belts and labor costs, and forming uncontrollable risks to product quality stability. Summary of the invention

[0003] The purpose of the present invention is to provide a gong mouth machine with a belt cooling function in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to guide and cool the material guide belt.

[0004] The object of the present invention can be achieved through the following technical solutions: a gong mouth machine with belt cooling function, the gong mouth machine includes a frame, a conveyor belt, a guide plate, a cutter and a guide belt, the guide belt is pulled by a driving wheel and a driven wheel, the driving wheel and the driven wheel are both rotatably connected to a mounting plate fixedly connected to the frame, the driving wheel is driven by a motor, and is characterized in that a guide bar is fixedly arranged on the lower side of the mounting plate, the guide bar guides the straight section of the guide belt close to the cutter side, the guide bar has a guide groove for allowing the guide belt to pass through, and the guide bar also has a cooling liquid cavity, and the gong mouth machine also includes a water supply device for circulating low-temperature cooling liquid into the cooling liquid cavity.

[0005] Furthermore, the water delivery device includes a water tank and a water pump. A refrigerator is arranged in the water tank. The water pump delivers low-temperature liquid in the water tank to one end of the cooling liquid cavity. The other end of the cooling liquid cavity is connected to the water tank.

[0006] In this scheme, the coolant is cooled by means of an external water delivery device, and the cooled liquid is delivered to the cooling liquid chamber in the guide strip. Since the straight section of the guide belt in contact with the plastic bottle is guided by the guide strip, the influence of the tension fluctuation of the guide belt on driving the operation of the plastic bottle is reduced. That is, under the limiting and guiding action of the guide strip, the guide belt will not produce a large deformation under the action of the compression force during the contact between the guide belt and the plastic bottle, thereby affecting the operation of the plastic bottle. In addition, since the guide belt is in a continuous cooling state, the heat transferred from the plastic bottle to the guide belt can be continuously taken away, ensuring that the guide belt is in a low temperature state. In the low temperature state, the thermal expansion and contraction of the guide belt caused by the characteristics of the material itself is significantly weakened, which has a positive effect on the service life and aging of the guide belt, and the generation of powder can be ignored. The guide belt will not cause large fluctuations in the extrusion force on the plastic bottle due to the thermal expansion and contraction caused by temperature fluctuations, and the product cutting quality and equipment stability are greatly improved.

[0007] As another option, the water delivery device includes a water cylinder detachably connected to a mounting plate, a drive shaft rotatably connected to the water cylinder, a water-guiding spiral blade fixed on the drive shaft, and a heat dissipation wheel driven to rotate by the drive shaft, wherein the water-guiding spiral blade is located in the water cylinder, the two ends of the cooling liquid chamber are respectively connected to the upper and lower ends of the water cylinder through a hose, the heat dissipation wheel is connected to the drive shaft through a reduction gear box, the rotation speed of the heat dissipation wheel is greater than the rotation speed of the drive shaft, and the heat dissipation wheel is located in the upper middle part of the outer side of the water cylinder.

[0008] Furthermore, a threaded sleeve located outside the driven wheel shaft is fixedly provided on the upper surface of the mounting plate, the water cylinder and the threaded sleeve are threadedly connected, the upper end surface of the driven wheel shaft has a conical spline opening, and the lower end of the drive shaft has a plug adapted to the spline opening.

[0009] The water cylinder can be disassembled and assembled by means of the threaded sleeve, and the power of the driven wheel is switched to the driving shaft. The spline mouth and the plug realize power transmission through the spline.

[0010] Furthermore, the outer wall of the water cylinder has a plurality of heat dissipation fins which are distributed alternately in the longitudinal direction. The heat dissipation fins and the water cylinder are made into one piece and are made of aluminum alloy with good heat dissipation.

[0011] Furthermore, a mesh protection box is fixedly arranged on the mounting plate and sleeved on the outside of the heat dissipation wheel. The mesh protection box can protect the heat dissipation wheel to prevent sundries from being entangled and also prevent the heat dissipation wheel from generating safety risks.

[0012] Furthermore, the driven wheel is close to the feeding direction of the conveyor belt. On the one hand, the effect of the heat dissipation wheel stirring the nearby airflow will not affect the cutting process, and the dust that may be generated during the cutting process will not be stirred by the airflow, because the position of the driven wheel is farther away from the cutting position and the discharge position of the residual material at the nozzle after cutting than the driving wheel.

[0013] Furthermore, a filling port is provided on the top side wall of the water cylinder, and a sealing cover is connected to the filling port.

[0014] Furthermore, the liquid circulating in the water cylinder and the cooling liquid cavity is water.

[0015] Furthermore, a bladder is serially connected to the hose, which is arranged in series on the hose to balance and compensate for the pressure fluctuation caused by the temperature difference of the liquid, thereby reducing the influence of the sealing performance of the hose and other interface positions under the pressure difference fluctuation.

[0016] The second solution of the present application is to change the external water supply in the first solution into self-water supply. In the first solution, due to the uncertainty of the shutdown state and the operating state of the gong mouth machine, the external water supply device needs to be controlled separately. In fact, it is not ideal to start the water supply when the gong mouth machine is running. The temperature of the material guide belt will also have obvious temperature fluctuations at the beginning of operation and after running for a period of time. This is because the water supply path is long. In fact, to control the cutting accuracy, it is not entirely necessary to control the material guide belt to be in a low temperature state, but to make the material guide belt in a low temperature state that fluctuates within a small range as much as possible. Therefore, in the second solution, we synchronize the operation of the material guide belt with the water supply, and use the rotation of the driven wheel as the power to realize the circulation of water and provide heat dissipation power. Specifically, when the gong is running, the material guide belt is kept in a low temperature state. When the gong machine starts, the driven wheel will also rotate, and the power is transmitted to the drive shaft from the spline mouth at the upper end of the driven wheel shaft. The drive shaft rotates, and under the action of the water-guiding spiral vane, the liquid in the water cylinder flows from bottom to top, driving the liquid to circulate, that is, the liquid circulates in the coolant chamber. The reduction gearbox converts the original low-speed drive shaft into a high-speed rotation of the heat dissipation wheel, so that it forms a high-speed dissipation effect of the airflow near the outer wall of the water cylinder outside the water cylinder, realizes the heat dissipation of the water cylinder, and reduces the water temperature in the water cylinder. The belt can be kept slightly higher than the room temperature, with small temperature difference fluctuations, short coolant running path, and sensitive temperature response on the guide belt. No external pipeline traction is required, which reduces maintenance and control costs. The degree of modification achieved on the existing gong machine is extremely small. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of this gong mouth machine.

[0018] Figure 2 It is a structural schematic diagram of the mounting plate and its connecting parts in the second embodiment.

[0019] Figure 3 It is a schematic diagram of the traction structure of the guide belt.

[0020] Figure 4 It is a partial cross-sectional view of the water cylinder in the second embodiment.

[0021] Figure 5 It is a top view of the water cylinder in the second embodiment.

[0022] Figure 6 It is a cross-sectional view of the matching position of the material guide belt and the guide strip.

[0023] In the figure, 1, frame; 2, conveyor belt; 3, guide plate; 4, cutter; 51, guide belt; 52, driving wheel; 53, driven wheel; 54, mounting plate; 55, motor; 61, guide strip; 62, guide groove; 63, coolant chamber; 71, water cylinder; 72, drive shaft; 73, water guide spiral blade; 74, heat dissipation wheel; 75, hose; 76, reduction gear box; 77, threaded sleeve; 78, spline mouth; 79, plug; 8, heat dissipation fin. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, a gong mouth machine with a belt cooling function includes a frame 1, a conveyor belt 2, a guide plate 3, a cutter 4 and a guide belt 51. The guide belt 51 is pulled by a driving wheel 52 and a driven wheel 53. The driving wheel 52 and the driven wheel 53 are both rotatably connected to a mounting plate 54 fixedly connected to the frame 1. The driving wheel 52 is driven by a motor 55. It is characterized in that a guide bar 61 is fixedly provided on the lower side of the mounting plate 54. The guide bar 61 guides the straight section of the guide belt 51 close to the cutter 4. The guide bar 61 has a guide groove 62 for allowing the guide belt 51 to pass through. The guide bar 61 also has a cooling liquid chamber 63. The gong mouth machine also includes a water supply device for circulating low-temperature cooling liquid into the cooling liquid chamber 63.

[0027] The water delivery device includes a water tank and a water pump. A refrigerator is installed in the water tank. The water pump delivers the low-temperature liquid in the water tank to one end of the cooling liquid chamber 63. The other end of the cooling liquid chamber 63 is connected to the water tank as shown in this part of the figure. This is an external cold circulation water cooling method in existing conventional practices.

[0028] In this scheme, the coolant is cooled by means of an external water delivery device, and the cooled liquid is delivered to the cooling liquid chamber 63 in the guide bar 61. Since the straight section of the guide belt 51 in contact with the plastic bottle is guided by the guide bar 61, the influence of the tension fluctuation of the guide belt 51 on driving the operation of the plastic bottle is reduced, that is, under the limiting guiding action of the guide bar 61, the guide belt 51 will not produce a large deformation under the action of the compression force during the contact between the guide belt 51 and the plastic bottle, thereby affecting the operation of the plastic bottle. In addition, since the guide belt 51 is in a continuous cooling state, the heat transferred from the plastic bottle to the guide belt 51 can be continuously taken away, ensuring that the guide belt 51 is in a low temperature state. In the low temperature state, the thermal expansion and contraction of the guide belt 51 caused by the material characteristics of the material itself is significantly weakened, which has a positive effect on the service life and aging of the guide belt 51, and the generation of powder can be ignored. The guide belt 51 will not cause a large fluctuation in the extrusion force on the plastic bottle due to the thermal expansion and contraction caused by temperature fluctuations, and the product cutting quality and equipment stability are greatly improved.

[0029] Embodiment 2:

[0030] like Figure 2-Figure 6 As shown, the water delivery device includes a water cylinder 71 detachably connected to the mounting plate 54, a driving shaft 72 rotatably connected to the water cylinder 71, a water guide spiral sheet 73 fixed to the driving shaft 72, and a heat dissipation wheel 74 driven to rotate by the driving shaft 72. The water guide spiral sheet 73 is located in the water cylinder 71, and the two ends of the cooling liquid chamber 63 are respectively connected to the upper and lower ends of the water cylinder 71 through a hose 75. The heat dissipation wheel 74 is connected to the driving shaft 72 through a reduction gear box 76. The rotation speed of the heat dissipation wheel 74 is greater than that of the driving shaft 72. The heat dissipation wheel 74 is located in the upper and middle part of the outer side of the water cylinder 71.

[0031] The upper surface of the mounting plate 54 is fixedly provided with a threaded sleeve 77 located outside the rotating shaft of the driven wheel 53. The water cylinder 71 is threadedly connected with the threaded sleeve 77. The upper end surface of the rotating shaft of the driven wheel 53 is provided with a conical spline opening 78. The lower end of the driving shaft 72 is provided with a plug 79 adapted to the spline opening 78. The water cylinder 71 can be assembled and disassembled with the threaded sleeve 77 to switch the power of the driven wheel 53 to the driving shaft 72. The spline opening 78 and the plug 79 realize power transmission through the spline.

[0032] The outer wall of the water cylinder 71 has a plurality of heat dissipation fins 8 which are distributed alternately in the longitudinal direction. The heat dissipation fins 8 and the water cylinder 71 are made into one piece and are made of aluminum alloy with good heat dissipation.

[0033] A mesh protection box sleeved outside the heat dissipation wheel 74 is fixedly arranged on the mounting plate 54. The mesh protection box can protect the heat dissipation wheel 74, avoid entanglement of sundries, and also prevent the heat dissipation wheel 74 from generating safety risks.

[0034] The driven wheel 53 is close to the material-incoming side of the conveyor belt 2. On the one hand, the effect of the heat dissipation wheel 74 stirring the airflow nearby will not affect the cutting process, and the dust that may be generated during the cutting process will not be stirred by the airflow, because the position of the driven wheel 53 is farther away from the cutting position and the discharge position of the residual material at the water outlet after cutting than the driving wheel 52.

[0035] A filling port is provided on the top side wall of the water cylinder 71, and a sealing cover is connected to the filling port.

[0036] The liquid flowing in the water cylinder 71 and the cooling liquid chamber 63 is water. A bladder is connected in series to the hose 75. The bladder is arranged in series on the hose 75 to balance and compensate for the pressure fluctuation caused by the temperature difference fluctuation of the liquid, and reduce the influence of the sealing of the hose 75 and other interface positions under the pressure difference fluctuation.

[0037] The second solution of the present application is to change the external water supply in the first solution into self-water supply. In the first solution, due to the uncertainty of the shutdown state and the operating state of the gong mouth machine, the external water supply device needs to be controlled separately. In fact, it is not ideal to start the water supply when the gong mouth machine is running. The temperature of the material guide belt 51 will also have obvious temperature fluctuations at the beginning of operation and after running for a period of time. This is because the water supply path is long. In fact, to control the cutting accuracy, it is not entirely necessary to control the material guide belt 51 to be in a low temperature state, but to make the material guide belt 51 in a low temperature state that fluctuates within a small range as much as possible. Therefore, in the second solution, we synchronize the operation of the material guide belt 51 with the water supply, and use the rotation of the driven wheel 53 as the power to realize the circulation of water and provide heat dissipation power. Specifically, when the gong mouth machine is started, the driven wheel 53 The driven wheel 53 also rotates, and the power is transmitted to the drive shaft 72 by the spline mouth 78 at the upper end of the rotating shaft of the driven wheel 53. The drive shaft 72 rotates, and under the action of the water-guiding spiral blade 73, the liquid in the water cylinder 71 flows from bottom to top, driving the liquid to circulate, that is, the liquid circulates in the cooling liquid chamber 63. The reduction gear box 76 converts the original low-speed drive shaft 72 into a high-speed rotation of the heat dissipation wheel 74, so that it forms a high-speed dissipation effect of the airflow near the outer wall of the water cylinder 71 outside the water cylinder 71, realizes the heat dissipation of the water cylinder 71, and reduces the water temperature in the water cylinder 71. The belt can be kept slightly higher than the room temperature, and the temperature difference fluctuation is small, the coolant running path is short, and the temperature response on the guide belt 51 is sensitive. No external pipeline traction is required, which reduces the maintenance cost and control cost. The modification on the existing gong mouth machine is extremely small.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A gong mouth machine with a belt cooling function, the gong mouth machine comprises a frame (1), a conveyor belt (2), a material guide plate (3), a cutter (4) and a material guide belt (51), the material guide belt (51) is pulled by a driving wheel (52) and a driven wheel (53), the driving wheel (52) and the driven wheel (53) are both rotatably connected to a mounting plate (54) fixedly connected to the frame (1), the driving wheel (52) is driven by a motor (55), and is characterized in that: A guide bar (61) is fixedly arranged at the lower side of the mounting plate (54), and the guide bar (61) guides the straight section of the material guide belt (51) close to the cutting knife (4). The guide bar (61) has a guide groove (62) for allowing the material guide belt (51) to pass through. The guide bar (61) also has a cooling liquid chamber (63). The gong machine also includes a water supply device for circulating low-temperature cooling liquid into the cooling liquid chamber (63).

2. A gong machine with belt cooling function according to claim 1, characterized in that: The water delivery device comprises a water tank and a water pump. A refrigerator is arranged in the water tank. The water pump delivers low-temperature liquid in the water tank to one end of the cooling liquid chamber (63). The other end of the cooling liquid chamber (63) is connected to the water tank.

3. A gong mouth machine with belt cooling function according to claim 1, characterized in that: The water delivery device comprises a water cylinder (71) detachably connected to a mounting plate (54), a driving shaft (72) rotatably connected to the water cylinder (71), a water guide spiral sheet (73) fixed to the driving shaft (72), and a heat dissipation wheel (74) driven to rotate by the driving shaft (72); the water guide spiral sheet (73) is located in the water cylinder (71); the two ends of the cooling liquid chamber (63) are respectively connected to the upper and lower ends of the water cylinder (71) through a hose (75); the heat dissipation wheel (74) is connected to the driving shaft (72) through a reduction gear box (76); the rotation speed of the heat dissipation wheel (74) is greater than the rotation speed of the driving shaft (72); and the heat dissipation wheel (74) is located in the middle and upper part of the outer side of the water cylinder (71).

4. A gong machine with belt cooling function according to claim 3, characterized in that: A threaded sleeve (77) located outside the rotating shaft of the driven wheel (53) is fixedly arranged on the upper surface of the mounting plate (54), the water cylinder (71) and the threaded sleeve (77) are threadedly connected, the upper end surface of the rotating shaft of the driven wheel (53) is provided with a conical spline opening (78), and the lower end of the driving shaft (72) is provided with a plug (79) adapted to the spline opening (78).

5. The gong machine with belt cooling function according to claim 3, characterized in that: The outer wall surface of the water cylinder (71) has a plurality of heat dissipation fins (8) distributed alternately in the longitudinal direction.

6. The gong machine with belt cooling function according to claim 3, characterized in that: A mesh protection box is fixedly arranged on the mounting plate (54) and is sleeved outside the heat dissipation wheel (74).

7. The gong machine with belt cooling function according to claim 3, characterized in that: The driven wheel (53) is close to the side of the conveyor belt (2) in the material incoming direction.

8. The gong machine with belt cooling function according to claim 3, characterized in that: A filling port is arranged on the top side wall of the water cylinder (71), and a sealing cover is connected to the filling port.

9. A gong machine with belt cooling function according to any one of claims 1 to 8, characterized in that: The liquid flowing in the water cylinder (71) and the cooling liquid cavity (63) is water.

10. A gong machine with belt cooling function according to any one of claims 3 to 8, characterized in that: The hose (75) is serially connected with a leather bag.

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