Blow molding machine

Abstract

The invention relates to the technical field of blow molding, in particular to a blow molding machine which comprises a machine body and further comprises a cold water circulation assembly, an arc-shaped shell and a cooling assembly, the side, away from a hole, of the arc-shaped shell is fixedly communicated with a mounting pipe, and the side, away from the arc-shaped shell, of the mounting pipe is fixedly provided with a second motor; a partition plate is fixedly mounted on the inner wall of the mounting pipe, a fixing disc is fixedly connected to the side, away from the second motor, of the partition plate, two air outlet holes are formed in the fixing disc, and a shielding plate is rotationally connected to the side, away from the partition plate, of the fixing disc. The plastic barrel has the advantages that the ventilation cross section of the air outlet hole for ventilation of hot air is gradually reduced, so that the temperature of the air entering the arc-shaped shell is gradually reduced, stress and deformation of the plastic barrel caused by rapid temperature change are reduced, the yield and quality of products are improved, proper temperature of the plastic barrel can be maintained by introducing proper amount of hot air at the initial stage, and the service life of the plastic barrel is prolonged. And uneven surface shrinkage or internal stress concentration caused by too fast cooling is avoided.

Description

Technical Field

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

[0002] Blow molding machine is a plastic processing machine. After the liquid plastic is heated and sprayed out, the wind blown out by the machine is used to blow the plastic body to a certain shape of the mold cavity to make the product. This machine is called a blow molding machine. Existing blow molding machines directly throw the product out after it is formed and let it fall freely. However, because the temperature of the product itself is still relatively high and its appearance is not stable enough, it is easy to cause the surface to dent due to collision when it falls freely to the storage table, and then the internal and external appearance will be deformed, affecting the product quality. There is a lot of room for improvement.

[0003] The invention patent with publication number CN118061509A discloses a blow molding machine with a cooling structure, including: a feeder is provided on the top surface of the front end of the film blowing machine body, a molding mold is provided on the front side of the film blowing machine body, the right end of the linear drive is provided at the bottom of the molding mold, a falling fixing mechanism is provided at the right end of the linear drive, and a cooling assembly is provided at the bottom of the left end of the linear drive. The molded product is transferred to the top of the cooling assembly by the linear drive, and the molded product is placed upright in the cooling assembly through the lower end fixing mechanism, and then the molded product is rotated in the direction of the long spray plate through the reverse rotating assembly inside the cooling assembly, ensuring that the surface of the molded product can be completely cooled and solidified, thereby improving the cooling efficiency.

[0004] Although the above patent has certain beneficial effects, the thicker blow molding barrel requires a longer cooling time during blow molding, resulting in lower blow molding efficiency. The above patent achieves rapid cooling by spraying water. Since the internal structure and shape of the blow molding barrel may still be in a relatively unstable state, rapid cooling with water may easily cause local rapid shrinkage of the product, thereby causing deformation, resulting in a decrease in the product yield, thereby making the equipment less practical. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of poor practicability of the equipment in the prior art and to propose a blow molding machine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A blow molding machine comprises a machine body, a fixed plate and a fixed shell are fixedly installed on the side wall of the machine body, the fixed plate is located above the fixed shell, a feeder and an inflating part are arranged on the top of the fixed plate, a moving platform is arranged at the bottom of the inner wall of the fixed shell, two molds are slidably connected to the top of the moving platform, and opening and closing mold parts are respectively arranged on the sides of the two molds away from each other, and the opening and closing mold parts are slidably connected to the inner wall of the fixed shell, a parison cutting part is arranged on the side wall of the machine body, and the parison cutting part is located between the fixed plate and the fixed shell, and further comprises: A cold water circulation component, which is arranged outside the fixed housing and is used to initially cool down the two molds; An arc-shaped shell, the arc-shaped shell is located on a side of the mobile platform away from the cold water circulation component, there are two arc-shaped shells, the two arc-shaped shells are symmetrically distributed on both sides of the mobile platform, the sides of the two arc-shaped shells close to each other are respectively provided with openings, and the sides of the two arc-shaped shells away from each other are respectively provided with cooling components; The cooling assembly includes a support plate, a refrigerator and a heater, wherein the support plate is fixedly mounted on the outer wall of the fixed shell, the refrigerator and the heater are fixedly mounted on the top of the support plate, a mounting pipe is fixedly connected to the side of the arc-shaped shell away from the opening, a second motor is fixedly mounted to the side of the mounting pipe away from the arc-shaped shell, a partition is fixedly mounted on the inner wall of the mounting pipe, the mounting pipe is fixedly connected to the refrigerator and the heater respectively with soft pipes, and the pipe openings of the two pipes are distributed on both sides of the partition, and the partition is used to separate cold air from hot air; A fixed plate is fixedly connected to the side of the partition away from the second motor, and the side wall of the fixed plate is fixedly connected to the inner wall of the mounting tube, two air outlets are provided on the fixed plate, and the two air outlets are used to let in hot air and cold air respectively, and a baffle is rotatably connected to the side of the fixed plate away from the partition, and the baffle is used to adjust the ventilation cross-section of the two air outlets, the rotating shaft of the second motor passes through the partition and the fixed plate and is fixedly connected to the baffle, and the rotating shaft is rotatably connected to the partition and the fixed plate, and the mounting tube is provided with a fan inside, the fan is located on the side of the baffle close to the arc shell, and a dust filter is provided on the side of the fan away from the baffle.

[0007] Preferably, the cold water circulation assembly includes two cold water circulation machines, which correspond to two molds respectively, and are connected to the molds on the corresponding sides through a heat pipe, which is located inside the mold and is a hose.

[0008] Preferably, two first electric telescopic rods are fixedly installed on the top of the fixed shell, and the two first electric telescopic rods are symmetrically distributed on both sides of the two arc-shaped shells. The two first electric telescopic rods are fixedly connected to connecting blocks at one end close to the fixed plate, and the bottom of the connecting block is slidably connected to the fixed shell, and two sliding bars are slidably connected to the inner wall of the fixed shell, and the two sliding bars are fixedly connected to the two connecting blocks respectively.

[0009] Preferably, the two sliding bars are fixedly connected to the second electric telescopic rod on one side close to each other, and the two second electric telescopic rods are fixedly connected to the extrusion plates on one end close to each other. A guide rod is fixedly connected between the two sliding bars, and the guide rod passes through the two extrusion plates and is slidably connected to the extrusion plates. Push bars are fixedly connected to the bottom of the two extrusion plates, and the extrusion plates are used to move the plastic barrel formed by the mold to between the two arc-shaped shells.

[0010] Preferably, it also includes two groups of limit components for limiting the upper and lower positions of the plastic barrel, the two groups of limit components are symmetrically distributed on the inner wall of the fixed shell, and correspond to the two arc-shaped shells respectively, the limit components include two first support bars, a second support bar and a support frame fixedly installed on the inner wall of the fixed shell, the two first support bars are located at the same height and are located below the extrusion plate, the second support bar is located below the first support bar, and the support frame is located on the side of the second support bar away from the moving platform, the two first support bars correspond to the second support bar and the support frame respectively, and the distance between the first support bar and the second support bar corresponds to the height of the plastic barrel.

[0011] Preferably, a pushing assembly is respectively provided on one side of the two arc-shaped shells away from each other, and the pushing assembly includes two third electric telescopic rods fixedly mounted on the inner wall of the fixed shell, and the two third electric telescopic rods are symmetrically distributed above and below the arc-shaped shell, and the two third electric telescopic rods are respectively connected to the arc-shaped shell through connecting assemblies, and the connecting assembly on the third electric telescopic rod above the arc-shaped shell is slidably connected to the corresponding first support bar, and the connecting assembly on the third electric telescopic rod below the arc-shaped shell is slidably connected to the corresponding second support bar and the support frame.

[0012] Preferably, the connecting assembly includes an L-shaped movable plate, a connecting plate and a transmission plate, the L-shaped movable plate is fixedly mounted on one end of the third electric telescopic rod close to the arc-shaped shell, the connecting plate is fixedly mounted on one side of the L-shaped movable plate close to the arc-shaped shell, the transmission plate is fixedly mounted on one side of the connecting plate close to the arc-shaped shell, and the side of the transmission plate close to the arc-shaped shell is slidably connected to the arc-shaped shell.

[0013] Preferably, it also includes a material removal component, which is divided into two groups. The two material removal components are symmetrically distributed above and below the two arc-shaped shells. The material removal component includes two rotating plates, which are symmetrically distributed on both sides of the two arc-shaped shells. The two rotating plates are respectively rotatably connected to the L-shaped movable plates on the corresponding sides, and are fixedly connected to the L-shaped movable plates with springs, which are used to pull the rotating plates close to the L-shaped movable plates, and the ends of the two rotating plates close to each other are respectively rotatably connected with clamping plates.

[0014] Preferably, two groups of drive components are provided on the inner wall of the fixed shell, and the two groups of drive components correspond to the two arc-shaped shells respectively. A transmission plate slidably connected to the bottom of the arc-shaped shell is fixedly connected to an extension plate on the side close to the mounting tube. The drive component includes a first motor, a gear and an arc-shaped rack. The first motor is fixedly mounted on the top of the extension plate, the gear is fixedly mounted on the output end of the first motor and is located above the first motor, and the arc-shaped rack is fixedly mounted on the side of the arc-shaped shell away from the opening, and the arc-shaped rack is meshed with the gear.

[0015] Preferably, a first belt conveyor and a second belt conveyor are provided at one end of the fixed shell away from the cold water circulation component, the second belt conveyor is located below the first belt conveyor, the second belt conveyor is used to convey waste, and the first belt conveyor is used to convey plastic barrels.

[0016] Compared with the prior art, the advantages of the present invention are: By installing devices such as partitions, baffles and a second motor, the baffles are rotated to change the ventilation cross-sections of the hot air outlet holes and the cold air outlet holes, and the ventilation cross-sections of the hot air outlet holes are gradually reduced, so that the temperature of the gas entering the arc-shaped shell is gradually reduced instead of suddenly decreasing. The smooth temperature transition helps to reduce the stress and deformation of the plastic barrel caused by the rapid temperature change, thereby improving the yield and quality of the product. The initial introduction of an appropriate amount of hot air can help maintain the appropriate temperature of the plastic barrel and avoid uneven surface shrinkage or internal stress concentration caused by too rapid cooling. As the cooling process proceeds, the proportion of cold air is gradually increased and the amount of hot air is reduced, which can more effectively utilize energy and reduce energy consumption.

[0017] The present invention installs devices such as a rotating plate, a clamping plate and a spring, and uses a limit assembly to limit the upward and downward movement of the plastic barrel. The rotating plate and the clamping plate are moved by extending the third electric telescopic rod. When the clamping plate moves, it contacts the waste material on the plastic barrel. The spring pulls the rotating plate so that the clamping plate clamps the preform waste material. As the third electric telescopic rod continues to extend, the two clamping plates pull the waste material, and the waste material at the upper and lower ends of the plastic barrel is separated from the plastic barrel, thereby realizing automatic removal of the preform waste material. At the same time, the waste material and the plastic barrel are transported separately, thereby reducing the separation process and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a blow molding machine proposed by the present invention; Figure 2 A schematic diagram of the structure of a blow molding machine body, a preform cutting portion, a molding assembly, a cooling assembly and a fixed shell provided by the present invention; Figure 3 A schematic diagram of the structure of a molding component and a cooling component of a blow molding machine proposed by the present invention; Figure 4 A schematic diagram of the structure of a preliminary cooling assembly of a blow molding machine proposed by the present invention; Figure 5 This is a schematic structural diagram of a moving component, a supporting component and a conveying component of a blow molding machine proposed by the present invention; Figure 6 This is a schematic structural diagram of a support assembly, a separation assembly, a conveying assembly and a cooling assembly of a blow molding machine proposed by the present invention; Figure 7 This is a schematic structural diagram of a support assembly, a separation assembly and a cooling assembly of a blow molding machine proposed by the present invention; Figure 8 A cross-sectional view of the separation component structure of a blow molding machine proposed by the present invention; Fig. 9 A partial structural cross-sectional view of a cooling component of a blow molding machine proposed by the present invention; Fig.10 A schematic diagram of the structure of a cooling component of a blow molding machine proposed by the present invention; Fig.11 This is a schematic diagram of the partial structural disassembly of a cooling component of a blow molding machine proposed by the present invention.

[0019] In the figure: 1 body, 2 fixed plate, 3 feeder, 4 inflatable part, 5 fixed shell, 6 first belt conveyor, 7 second belt conveyor, 8 embryo cutting part, 9 moving platform, 10 mold, 11 cold water circulation machine, 12 opening and closing mold part, 13 heat pipe, 14 first electric telescopic rod, 15 connecting block, 16 sliding bar, 17 guide rod, 18 second electric telescopic rod, 19 extrusion plate, 20 push bar, 21 first support bar, 22 second support bar, 23 support frame, 24 support plate, 25 refrigerator, 26 heating machine, 27 third electric telescopic rod, 28 L-shaped moving plate, 29 rotating plate, 30 clamping plate, 31 spring, 32 connecting plate, 33 transmission plate, 34 arc shell, 35 first motor, 36 gear, 37 arc rack, 38 mounting pipe, 39 fan, 40 dust filter, 41 fixed plate, 42 air outlet, 43 partition, 44 second motor, 45 shielding plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figures 1 to 5 A blow molding machine comprises a machine body 1, a fixed plate 2 and a fixed shell 5 are fixedly installed on the side wall of the machine body 1, the fixed shell 5 is U-shaped, the fixed plate 2 is located above the fixed shell 5, a parison cutting portion 8 is arranged on the side of the machine body 1 close to the fixed shell 5, the parison cutting portion 8 is located between the fixed shell 5 and the fixed plate 2, a feeder 3 and an inflation portion 4 are arranged on the top of the fixed plate 2, two opening and closing mold portions 12 are slidably connected to the inner wall of the fixed shell 5, molds 10 are respectively arranged on the sides of the two opening and closing mold portions 12 close to each other, a moving platform 9 is arranged at the bottom of the inner wall of the fixed shell 5, the moving platform 9 is located at the bottom of the two molds 10, and is slidably connected to the two molds 10, two cold water circulation machines 11 are arranged outside the fixed shell 5, the two cold water circulation machines 11 correspond to the two molds 10, and the cold water circulation machines 11 are fixedly connected to the molds 10 on the corresponding side with heat conduction pipes 13, and the heat conduction pipes 13 are located at the bottom of the inner wall of the fixed shell 5. Inside the mold 10, the heat conducting pipe 13 is a hose, and the inflation part 4 is located on the side of the feeder 3 away from the cold water circulation machine 11. The feeder 3 discharges the preform to between the two molds 10, and the two opening and closing mold parts 12 work to make the two molds 10 close to each other for clamping. Then the preform cutting part 8 cuts the preform, and the moving platform 9 works. The two clamped molds 10 move to the bottom of the inflation part 4 for inflation. After the inflation is completed, the cold water circulation machine 11 and the heat conducting pipe 13 work to lower the temperature of the mold 10. The outer layer of the plastic barrel generated between the two molds 10 is solidified and formed. The first belt conveyor 6 and the second belt conveyor 7 are provided at the end of the fixed shell 5 away from the cold water circulation machine 11. The first belt conveyor 6 is located above the second belt conveyor 7. The first belt conveyor 6 is used to convey the plastic barrel formed by the mold 10, and the second belt conveyor 7 is used to convey the waste remaining at the top and bottom of the plastic barrel.

[0022] Two first electric telescopic rods 14 are fixedly installed on the top of the fixed shell 5, and the two first electric telescopic rods 14 are symmetrically distributed on both sides of the first belt conveyor 6. The ends of the two first electric telescopic rods 14 close to the fixed plate 2 are respectively fixedly connected with connecting blocks 15, and the bottom of the connecting block 15 is slidably connected to the fixed shell 5. Two sliding bars 16 are slidably connected to the inner wall of the fixed shell 5. The two sliding bars 16 are symmetrically distributed on both sides of the second belt conveyor 7 and are respectively fixedly connected to the two connecting blocks 15. The sides of the two sliding bars 16 close to each other are respectively fixedly connected with second electric telescopic rods 18, and the ends of the two second electric telescopic rods 18 close to each other are respectively fixedly connected with extrusion plates 19. A guide rod 17 is fixedly connected between the two sliding bars 16, and the guide rod 17 passes through the two extrusion plates 19 and is slidably connected to the extrusion plates 19. The bottoms of the two extrusion plates 19 are respectively fixedly connected with push bars 20, which correspond to the plastic barrels and are used to push the plastic barrels to move onto the first belt conveyor 6. The first electric telescopic rod 14 pushes the connecting block 15 to drive the sliding bar 16 to slide toward the mold 10, so that the extrusion plate 19 moves to the top of the mold 10, corresponding to the waste on the top of the plastic barrel. The second electric telescopic rod 18 works, and the extrusion plate 19 approaches the waste remaining on the top of the plastic barrel along the guide rod 17. The two extrusion plates 19 clamp the waste. After the extrusion plates 19 fix the waste, the two molds 10 move away from each other for demoulding. Then the first electric telescopic rod 14 is started, and the connecting block 15 drives the sliding bar 16 to move away from the fixed plate 2. Since the waste is not separated from the plastic barrel, the two extrusion plates 19 drive the waste and the plastic barrel to move away from the fixed plate 2.

[0023] Reference Figures 5 to 11The inner wall of the fixed shell 5 is provided with two arc-shaped shells 34, and the two arc-shaped shells 34 are located on the side of the mobile platform 9 away from the cold water circulation machine 11. The two arc-shaped shells 34 are symmetrically distributed on both sides of the second belt conveyor 7. The inner wall of the fixed shell 5 is provided with two groups of limit components, and the two groups of limit components are symmetrically distributed on the side where the two arc-shaped shells 34 are away from each other, and correspond to the two extrusion plates 19 respectively. The limit components include a first support bar 21, a second support bar 22 and a support frame 23 fixedly installed on the inner wall of the fixed shell 5. There are two first support bars 21, and the two first support bars 21 are located at the same height and below the extrusion plate 19 on the corresponding side. The second support bar 22 is located at the first support bar 21. Below, the support frame 23 is located on the side of the second support bar 22 away from the mold 10. The support frame 23 is U-shaped. The support frame 23 corresponds to the first belt conveyor 6. The push bar 20 pushes the plastic barrel from the support frame 23 to the first belt conveyor 6. The two first support bars 21 correspond to the second support bar 22 and the support frame 23 respectively. The distance between the first support bar 21 and the second support bar 22 corresponds to the height of the plastic barrel. The two extrusion plates 19 drive the plastic barrel to move between the first support bar 21 and the second support bar 22. Two sets of limiting components limit the plastic barrel to prevent the plastic barrel from moving up and down and affecting the progress of the work. Then, the second electric telescopic rod 18 is used to make the two extrusion plates 19 move away from each other.

[0024] The two arc-shaped shells 34 are respectively provided with a pushing assembly on one side away from each other, and the pushing assembly includes two third electric telescopic rods 27 fixedly mounted on the inner wall of the fixed shell 5, and the two third electric telescopic rods 27 are symmetrically distributed above and below the arc-shaped shell 34. The two third electric telescopic rods 27 are respectively connected to the arc-shaped shell 34 through a connecting assembly, and the connecting assembly includes an L-shaped moving plate 28, a connecting plate 32 and a transmission plate 33. The L-shaped moving plate 28 is fixedly mounted on one end of the third electric telescopic rod 27 close to the arc-shaped shell 34, and the connecting plate 32 is fixedly mounted on the L-shaped moving plate 2 8 is close to the side of the arc-shaped shell 34, the transmission plate 33 is fixedly installed on the side of the connecting plate 32 close to the arc-shaped shell 34, the side of the transmission plate 33 close to the arc-shaped shell 34 is slidably connected to the arc-shaped shell 34, the connecting component on the third electric telescopic rod 27 above the arc-shaped shell 34 is slidably connected to the corresponding first support bar 21, and the connecting component on the third electric telescopic rod 27 below the arc-shaped shell 34 is slidably connected to the corresponding second support bar 22 and the support frame 23, pushing the two third electric telescopic rods 27 in the assembly to work, so that the arc-shaped shell 34 is close to the plastic barrel.

[0025] The two arc-shaped shells 34 are provided with cooling components on the sides away from each other, and the cooling components include a support plate 24 fixedly mounted on the outer wall of the fixed shell 5, and a refrigerator 25 and a heater 26 are fixedly mounted on the top of the support plate 24. The two arc-shaped shells 34 are provided with openings on the sides close to each other, and a mounting pipe 38 is fixedly connected to the side of the arc-shaped shell 34 away from the opening. A fan 39 and a dust filter 40 are provided on the inner wall of the mounting pipe 38. The dust filter 40 is located on the side of the fan 39 close to the arc-shaped shell 34, and a second motor 4 is fixedly mounted on the side of the mounting pipe 38 away from the arc-shaped shell 34. 4, a partition 43 is fixedly installed on the inner wall of the mounting pipe 38, and the mounting pipe 38 is fixedly connected to the corresponding side of the refrigerator 25 and the heating machine 26 by soft pipes, and the pipe openings of the pipes are distributed on both sides of the partition 43. The partition 43 separates the cold air and the hot air in the mounting pipe 38. A fixed plate 41 is fixedly installed on the side of the partition 43 away from the second motor 44. The side wall of the fixed plate 41 is fixedly connected to the inner wall of the mounting pipe 38. Two air outlets 42 are provided on the fixed plate 41. The two air outlets 42 correspond to the two sides of the partition 43, respectively, and the hot air and the cold air are respectively introduced. The fixed plate 41 is away from the partition A baffle plate 45 is rotatably connected to one side of the plate 43, a rotating shaft of the second motor 44 penetrates the baffle plate 43 and the fixed plate 41 and is fixedly connected to the baffle plate 45, and is rotatably connected to the baffle plate 43 and the fixed plate 41, a fan 39 is located on the side of the baffle plate 45 away from the second motor 44, and the fan 39 works to suck the gas in the refrigerator 25 and the heater 26 into the mounting pipe 38, and the gas passes through the air outlet 42 and the dust filter 40 and is ejected from the opening of the arc-shaped shell 34 to the surface of the plastic barrel, accelerating the cooling of the plastic barrel, and the second motor 44 is started to rotate the baffle plate 45, thereby adjusting the two air outlet holes 4 2, the ventilation cross-section of the hot air outlet 42 is gradually reduced, so that the temperature of the gas entering the mounting pipe 38 is gradually reduced, and the temperature of the gas sprayed onto the plastic barrel is also gradually reduced. The gas quickly takes away the heat of the plastic barrel, speeding up the cooling process of the plastic barrel. By gradually reducing the temperature of the gas, a relatively uniform temperature gradient can be maintained during the cooling process, reducing the generation of internal stress, reducing the occurrence of deformation and cracking, and avoiding the situation in which the temperature gradient is too large during water cooling, which may cause local rapid shrinkage and deformation of the product, thereby reducing the scrap rate of blow molding.

[0026] A driving assembly is respectively provided on the side away from each other of the two arc-shaped shells 34, and an extension plate is fixedly connected to the transmission plate 33 slidably connected to the bottom of the arc-shaped shell 34 on the side away from the hole. The driving assembly includes a first motor 35, a gear 36 and an arc-shaped rack 37. The first motor 35 is fixedly mounted on the top of the extension plate, the gear 36 is fixedly mounted on the output end of the first motor 35 and is located above the first motor 35, and the arc-shaped rack 37 is fixedly mounted on one side of the arc-shaped shell 34 where the mounting tube 38 is mounted. The gear 36 meshes with the arc-shaped rack 37. The first motor 35 drives the gear 36 to rotate forward and reversely. The arc-shaped rack 37 drives the arc-shaped shell 34 to rotate under the action of the gear 36, and continuously changes the blowing direction and position, so that all parts of the plastic barrel can be fully cooled, effectively reducing the temperature of the plastic barrel, shortening the cooling time, and improving production efficiency.

[0027] The inner wall of the fixed shell 5 is provided with two groups of material removal components, which are symmetrically distributed above and below the two arc-shaped shells 34, and are respectively used to remove the waste remaining on the top and bottom of the plastic barrel. The material removal components include two rotating plates 29, which are symmetrically distributed on both sides of the two arc-shaped shells 34. The two rotating plates 29 are respectively rotatably connected with the L-shaped movable plates 28 on the corresponding sides, and the ends of the two rotating plates 29 close to each other are respectively rotatably connected with clamping plates 30, and the height of the clamping plates 30 is lower than the height of the extrusion plate 19 to prevent the clamping plates 30 from affecting the movement of the extrusion plate 19. The rotating plate 29 is fixedly connected to the L-shaped movable plate 28 with a spring 31, and the spring 31 is located on the side of the rotating plate 29 close to the L-shaped movable plate 28. After cooling is completed, the third electric telescopic rod 27 pushes the L-shaped movable plate 28 to move. The plate 28 is close to the plastic barrel, so that the two clamps 30 in the material removal assembly are in contact with the waste in the plastic barrel, and the spring 31 pulls the rotating plate 29 close to the L-shaped movable plate 28, so that the clamps 30 clamp the preform waste. As the third electric telescopic rod 27 continues to extend, the two clamps 30 in the material removal assembly pull the preform waste to separate from the plastic barrel. During this process, the two arc-shaped shells 34 push the plastic barrel so that the plastic barrel is located at the center between the two sides of the fixed shell 5. Automatic removal of preform waste can achieve continuous and rapid waste removal, thereby improving production efficiency, reducing dependence on manual operation, and reducing labor costs. At the same time, it improves the stability and consistency of the product. The timely separation of waste from the plastic barrel avoids the adverse effects of waste on the quality of the plastic barrel, thereby improving the overall quality of the product.

[0028] In the present invention, the blank can be discharged to between the two molds 10 through the feeder 3, and then the two molds 10 are closed through the two opening and closing parts 12, and the blank is cut by the blank cutting part 8, and then the mold 10 is moved to the bottom of the inflation part 4 through the moving platform 9, and the blank between the two molds 10 is inflated by the inflation part 4. After the inflation is completed, the temperature of the mold 10 is lowered by two cold water circulation machines 11 and the heat conduction pipe 13, so as to cool the plastic barrel and solidify its outer layer to achieve blow molding of a thicker plastic barrel.

[0029] After the plastic barrel is formed, flattened preform waste will remain at both the upper and lower ends. Since the inflation portion 4 is arranged above the two extrusion plates 19, the waste of the formed plastic barrel is between the two extrusion plates 19. Through the extension of the two second electric telescopic rods 18, the two extrusion plates 19 respectively fixed at the ends of the two second electric telescopic rods 18 can clamp and fix the preform waste. Since there is still a certain connection between the preform waste and the plastic barrel, the plastic barrel is also limited. Then, the two molds 10 are moved away from each other to achieve demolding, and then the mold 10 is moved to the bottom of the fixed plate 2 by the moving table 9 to repeat the processing process. The sliding bar 16 can slide inside the fixed shell 5 through the first electric telescopic rod 14 and the connecting block 15, so that the sliding bar 16 fixed on the sliding bar 1 6, the second electric telescopic rod 18 and the guide rod 17 on the extrusion plate 19 are moved, so that the extrusion plate 19 is also moved. The guide rod 17 is used to support and guide the extrusion plate 19. With the contraction of the first electric telescopic rod 14, the plastic barrel can be moved to the second support bar 22 and the support frame 23. At this time, the upper and lower ends of the plastic barrel are respectively in contact with the second support bar 22, the support frame 23 and the two first support bars 21, so that the plastic barrel cannot move up and down. Then, the two extrusion plates 19 are moved away from each other by the second electric telescopic rod 18, and the height of the clamping plate 30 is lower than the height of the extrusion plate 19, which can prevent the clamping plate 30 from affecting the movement of the extrusion plate 19. Then, the L-shaped moving plate 28 is moved by the extension of the third electric telescopic rod 27, so that the connecting plate 32, the transmission plate 32 and the transmission plate 33 are connected to each other. The movable plate 33 and the arc-shaped shell 34 are both moved, so that the two arc-shaped shells 34 are close to the plastic barrel. Since the refrigerator 25 and the heater 26 are respectively connected to the inside of the installation pipe 38 through pipelines, the gas in the refrigerator 25 and the heater 26 can be sucked into the inside of the installation pipe 38 through the fan 39. After being filtered by the dust filter 40, the gas can be sprayed to the surface of the plastic barrel through the opening of the arc-shaped shell 34, thereby accelerating the cooling of the plastic barrel. The partition 43 is fixed between the fixed plate 41 and the installation pipe 38. The two air outlets 42 can be divided by the partition 43, so that the gas of the refrigerator 25 and the heater 26 pass through the two air outlets 42 respectively. The second motor 44 can drive the shielding plate 45 to rotate, thereby adjusting the two air outlets 42. The size of the ventilation cross section makes the ventilation cross section of the air outlet 42 connected to the heater 26 gradually decrease, which can gradually reduce the temperature of the gas entering the installation pipe 38, so that the temperature of the gas sprayed onto the plastic barrel can also gradually reduce. The gas sprayed onto the surface of the plastic barrel can quickly take away the heat, thereby accelerating the cooling process of the plastic barrel. By gradually reducing the temperature of the gas, a relatively uniform temperature gradient can be maintained during the cooling process, reducing the generation of internal stress, reducing the occurrence of deformation and cracking, and avoiding the situation in which the temperature gradient is too large during water cooling, which easily leads to local rapid shrinkage and deformation of the product, thereby reducing the scrap rate of blow molding. During the cooling process, the first motor 35 can drive the gear 36 to rotate forward and reverse.Thus, the arc-shaped rack 37 and the arc-shaped housing 34 can both reciprocate, which can expand the cooling range, improve the cooling uniformity, and help maintain the shape stability of the plastic barrel.

[0030] After the cooling is completed, the third electric telescopic rod 27 is extended, so that the rotating plate 29 rotatably arranged on the upper surface of the L-shaped movable plate 28 and the clamping plate 30 rotatably arranged at the end of the rotating plate 29 are moved. When the two clamping plates 30 move, they can contact the waste mold on the plastic barrel, and the elastic force of the spring 31 can pull the rotating plate 29 downward, so that the clamping plates 30 can clamp the waste mold. As the third electric telescopic rod 27 continues to extend, the symmetrically arranged clamping plates 30 can pull the waste mold upward and downward respectively, so that the waste mold at the upper and lower ends of the plastic barrel can be separated from the plastic barrel. In this process, the two arc-shaped shells 34 can push the plastic barrel so that the plastic barrel Located at the center between the two sides of the fixed shell 5, the arc-shaped shell 34 and the clamping plate 30 are then reset through the contraction of the third electric telescopic rod 27. At this time, the preform waste can fall onto the second belt conveyor 7 for transportation. When the two extrusion plates 19 clamp the newly blow-molded plastic barrel and move, the two push bars 20 will push the cooled plastic barrel, so that the plastic barrel moves along the support frame 23 to the first belt conveyor 6 for transportation. The preform waste can be automatically removed, and the preform waste and the plastic barrel can be transported separately, which reduces the separation process and improves the processing efficiency. The processing efficiency can also be improved by discharging the cooled plastic barrel while moving the plastic barrel.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A blow molding machine, comprising a machine body (1), a fixed plate (2) and a fixed shell (5) being fixedly mounted on the side wall of the machine body (1), the fixed plate (2) being located above the fixed shell (5), a feeder (3) and an inflating portion (4) being arranged on the top of the fixed plate (2), a moving platform (9) being arranged at the bottom of the inner wall of the fixed shell (5), two molds (10) being slidably connected to the top of the moving platform (9), opening and closing mold portions (12) being arranged on the sides of the two molds (10) which are away from each other, and the opening and closing mold portions (12) being slidably connected to the inner wall of the fixed shell (5), a parison cutting portion (8) being arranged on the side wall of the machine body (1), and the parison cutting portion (8) being located between the fixed plate (2) and the fixed shell (5), It is characterized in that Also includes: A cold water circulation component, the cold water circulation component being arranged outside the fixed housing (5), the cold water circulation component being used to initially cool down the two moulds (10); An arc-shaped shell (34), the arc-shaped shell (34) being located on a side of the mobile platform (9) away from the cold water circulation component, the arc-shaped shell (34) being two, the two arc-shaped shells (34) being symmetrically distributed on both sides of the mobile platform (9), the sides of the two arc-shaped shells (34) close to each other being respectively provided with openings, and the sides of the two arc-shaped shells (34) away from each other being respectively provided with cooling components; The cooling component comprises a support plate (24), a refrigerator (25) and a heater (26); the support plate (24) is fixedly mounted on the outer wall of the fixed shell (5); the refrigerator (25) and the heater (26) are fixedly mounted on the top of the support plate (24); a mounting pipe (38) is fixedly connected to a side of the arc-shaped shell (34) away from the opening; a second motor (44) is fixedly mounted to a side of the mounting pipe (38) away from the arc-shaped shell (34); a partition (43) is fixedly mounted on an inner wall of the mounting pipe (38); the mounting pipe (38) is fixedly connected to the refrigerator (25) and the heater (26) respectively by soft pipes, and the pipe openings of the two pipes are distributed on both sides of the partition (43); the partition (43) is used to separate cold air from hot air; A fixed plate (41) is fixedly connected to a side of the partition (43) away from the second motor (44), and a side wall of the fixed plate (41) is fixedly connected to an inner wall of the mounting tube (38). Two air outlet holes (42) are provided on the fixed plate (41), and the two air outlet holes (42) are used to allow hot air and cold air to enter, respectively. A baffle plate (45) is rotatably connected to a side of the fixed plate (41) away from the partition (43), and the baffle plate (45) is used to adjust the two air outlet holes. The second motor (44) has a ventilation cross-section (42), a rotating shaft of the second motor (44) passes through the partition (43) and the fixed plate (41) and is fixedly connected to the baffle plate (45), and the rotating shaft is rotatably connected to the partition plate (43) and the fixed plate (41), a fan (39) is arranged inside the mounting tube (38), the fan (39) is located on a side of the baffle plate (45) close to the arc-shaped housing (34), and a dust filter (40) is arranged on a side of the fan (39) away from the baffle plate (45).

2. A blow molding machine according to claim 1, It is characterized in that The cold water circulation assembly comprises two cold water circulation machines (11), the two cold water circulation machines (11) respectively corresponding to the two moulds (10), and the cold water circulation machines (11) are connected to the moulds (10) on the corresponding side via a heat conducting pipe (13), the heat conducting pipe (13) is located inside the mould (10), and the heat conducting pipe (13) is a hose.

3. A blow molding machine according to claim 1, It is characterized in that Two first electric telescopic rods (14) are fixedly mounted on the top of the fixed shell (5), and the two first electric telescopic rods (14) are symmetrically distributed on both sides of the two arc-shaped shells (34). One end of the two first electric telescopic rods (14) close to the fixed plate (2) is respectively fixedly connected to a connecting block (15), and the bottom of the connecting block (15) is slidably connected to the fixed shell (5). The inner wall of the fixed shell (5) is slidably connected to two sliding bars (16), and the two sliding bars (16) are respectively fixedly connected to the two connecting blocks (15).

4. A blow molding machine according to claim 3, It is characterized in that The two sliding bars (16) are fixedly connected to a second electric telescopic rod (18) on one side close to each other, and the two second electric telescopic rods (18) are fixedly connected to an extrusion plate (19) on one end close to each other. A guide rod (17) is fixedly connected between the two sliding bars (16), and the guide rod (17) passes through the two extrusion plates (19) and is slidably connected to the extrusion plates (19). The bottoms of the two extrusion plates (19) are fixedly connected to a push bar (20), and the extrusion plates (19) are used to move the plastic barrel formed by the mold (10) to between the two arc-shaped shells (34).

5. A blow molding machine according to claim 4, It is characterized in that The invention also comprises two groups of limit assemblies for limiting the upper and lower positions of the plastic barrel. The two groups of limit assemblies are symmetrically distributed on the inner wall of the fixed shell (5) and correspond to the two arc-shaped shells (34) respectively. The limit assemblies comprise two first support bars (21), a second support bar (22) and a support frame (23) fixedly mounted on the inner wall of the fixed shell (5). The two first support bars (21) are located at the same height and below the extrusion plate (19). The second support bar (22) is located below the first support bar (21). The support frame (23) is located on a side of the second support bar (22) away from the moving platform (9). The two first support bars (21) correspond to the second support bar (22) and the support frame (23) respectively. The distance between the first support bar (21) and the second support bar (22) corresponds to the height of the plastic barrel.

6. A blow molding machine according to claim 5, It is characterized in that A pushing assembly is respectively provided on one side of the two arc-shaped shells (34) that is away from each other. The pushing assembly comprises two third electric telescopic rods (27) fixedly mounted on the inner wall of the fixed shell (5). The two third electric telescopic rods (27) are symmetrically distributed above and below the arc-shaped shell (34). The two third electric telescopic rods (27) are respectively connected to the arc-shaped shell (34) via a connecting assembly. The connecting assembly on the third electric telescopic rod (27) above the arc-shaped shell (34) is slidably connected to the corresponding first support bar (21), and the connecting assembly on the third electric telescopic rod (27) below the arc-shaped shell (34) is slidably connected to the corresponding second support bar (22) and the support frame (23).

7. A blow molding machine according to claim 6, It is characterized in that The connecting assembly comprises an L-shaped moving plate (28), a connecting plate (32) and a transmission plate (33); the L-shaped moving plate (28) is fixedly mounted on one end of the third electric telescopic rod (27) close to the arc-shaped shell (34); the connecting plate (32) is fixedly mounted on one side of the L-shaped moving plate (28) close to the arc-shaped shell (34); the transmission plate (33) is fixedly mounted on one side of the connecting plate (32) close to the arc-shaped shell (34); and the side of the transmission plate (33) close to the arc-shaped shell (34) is slidably connected to the arc-shaped shell (34).

8. A blow molding machine according to claim 7, It is characterized in that The invention also includes a material removal assembly, wherein the material removal assembly is divided into two groups, and the two material removal assemblies are symmetrically distributed above and below the two arc-shaped shells (34). The material removal assembly includes two rotating plates (29), and the two rotating plates (29) are symmetrically distributed on both sides of the two arc-shaped shells (34). The two rotating plates (29) are respectively rotatably connected to the L-shaped movable plates (28) on the corresponding sides, and are fixedly connected to the L-shaped movable plates (28) with springs (31). The springs (31) are used to pull the rotating plates (29) close to the L-shaped movable plates (28), and the ends of the two rotating plates (29) close to each other are respectively rotatably connected with clamping plates (30).

9. A blow molding machine according to claim 7, It is characterized in that Two groups of drive components are arranged on the inner wall of the fixed housing (5), and the two groups of drive components correspond to the two arc-shaped housings (34) respectively. A transmission plate (33) slidably connected to the bottom of the arc-shaped housing (34) is fixedly connected to an extension plate on a side close to the mounting tube (38). The drive components include a first motor (35), a gear (36) and an arc-shaped rack (37). The first motor (35) is fixedly mounted on the top of the extension plate. The gear (36) is fixedly mounted on the output end of the first motor (35) and is located above the first motor (35). The arc-shaped rack (37) is fixedly mounted on a side of the arc-shaped housing (34) away from the opening, and the arc-shaped rack (37) is meshed with the gear (36).

10. A blow molding machine according to claim 1, It is characterized in that A first belt conveyor (6) and a second belt conveyor (7) are provided at one end of the fixed housing (5) away from the cold water circulation assembly, wherein the second belt conveyor (7) is located below the first belt conveyor (6), the second belt conveyor (7) is used to convey waste materials, and the first belt conveyor (6) is used to convey plastic barrels.

Images