Molding device for preparing plastic bottles through plastic recovery

Abstract

The invention relates to the field of plastic bottle preparation from recycled plastics, in particular to a forming device for plastic bottle preparation from recycled plastics. Comprising a recycling assembly for melting and mixing waste plastic and a discharging assembly arranged on the recycling assembly and used for pushing the molten plastic to be quantitatively discharged, a conveying assembly for conveying materials is arranged on the lower portion of the recycling assembly, and the conveying assembly conveys a mold assembly for preparing plastic bottles. The conveying assembly conveys the mold assembly loaded with molten plastic to the position below the pressurizing assembly, the pressurizing assembly comprises a pressurizing pipe capable of linearly moving along the axis of the pressurizing pipe, the pressurizing pipe can rotate around the axis of the pressurizing pipe, and a plurality of rows of pressurizing holes are evenly distributed in the outer wall of the pressurizing pipe and arranged in a staggered mode in the vertical direction. And a pipe for conveying high-pressure air extends into a mold for molding the plastic bottle, and uniformly pressurizes the cup-shaped molten plastic which is recycled and reutilized in the mold from the periphery and the lower part under rotation, so that the plastic bottle is uniformly molded.

Description

Technical Field

[0001] The present invention relates to the field of preparing plastic bottles from recycled plastics, and more specifically to a molding device for preparing plastic bottles from recycled plastics. Background Art

[0002] The use of plastic products is extremely extensive in modern society, covering multiple fields, including daily life, industrial production, medical treatment, agriculture, transportation, etc. These products have become an indispensable part of modern society due to their light weight, durability, low cost, etc. However, the extensive application of plastic products has also brought serious environmental problems. Therefore, solving the environmental pollution caused by plastics has become a top priority, and the recycling of waste plastics has become an important direction to solve plastic pollution; plastic recycling is the process of reprocessing waste plastics into new products through physical, chemical or biological methods, aiming to reduce environmental pollution, save resources and reduce carbon emissions. This process involves multiple stages, including collection, sorting, cleaning, crushing, granulation and recycling, etc. And how to quickly disperse the recycled plastics has become an important issue during plastic recycling. Among plastic products, plastic bottles are widely used in multiple industries such as food, beverage, cosmetics, medicine, etc. due to their light weight, corrosion resistance and transparency, etc. Therefore, re-preparing recycled waste plastics into plastic bottles is a very good direction for reuse, because the wide application of plastics can be quickly sold, the funds can be recovered, and the accumulation of recycled plastics can be avoided. Currently, when preparing plastic bottles, the blow molding method is usually adopted. However, in the existing blow molding process for plastic bottles, high-pressure air cannot be evenly filled in the mold of the formed plastic bottle to achieve uniform molding of the plastic bottle. Summary of the Invention

[0003] To optimize the deficiencies of the prior art, the present invention provides a molding device for preparing plastic bottles from recycled plastics. The pipe for transporting high-pressure air extends into the mold of the formed plastic bottle, and under rotation, uniformly pressurizes the molten plastic processed from recycled materials in the mold into a cup shape from all around and below to achieve uniform molding of the plastic bottle.

[0004] The technical solution adopted by the present invention to solve its technical problems is:

[0005] A molding device for preparing plastic bottles from recycled plastics, comprising a recycling component for melting and mixing waste plastics and a feeding component arranged on the recycling component to push the melted plastics for quantitative feeding. A transportation component for transporting materials is arranged at the lower part of the recycling component. The transportation component transports a mold component for preparing plastic bottles. The mold components transported by the transportation component stay intermittently below the recycling component. The transportation component transports the mold component loaded with melted plastics to below a pressurizing component. The pressurizing component includes a pressurizing pipe capable of linear movement along its own axis. The pressurizing pipe can rotate around its own axis. Multiple rows of pressurizing holes are evenly distributed on the outer wall of the pressurizing pipe. The multiple rows of pressurizing holes are arranged in a staggered manner in the vertical direction. The upper part of the pressurizing pipe is rotatably connected to a variable-diameter pipe. The upper diameter of the variable-diameter pipe is larger than the lower diameter. The variable-diameter pipe is communicated with the output pipe of an air compressor.

[0006] Further, the recycling component includes a mixing barrel. A converging pipe is arranged at the lower part of the mixing barrel. An upper frame is fixedly connected to the upper part of the mixing barrel. A middle pipe is rotatably connected to the middle of the upper frame. Multiple spiral blades are arranged on the outer wall of the middle pipe. A first gear is fixedly connected to the upper part of the middle pipe. A second gear for driving the first gear to rotate is rotatably connected to the upper frame.

[0007] A positioning plate is arranged at the lower part of the inner wall of the middle pipe. A pressing plate is threadedly connected to the upper part of the inner wall of the middle pipe. A sleeve is arranged between the positioning plate and the pressing plate. A lower plate that fits the upper part of the positioning plate is arranged at the lower part of the sleeve. An upper plate is threadedly connected to the upper part of the sleeve. Two first cylinders are fixedly connected to the upper plate. A plugging pipe upper cover is fixedly connected to the cylinder rods of the two first cylinders. A plugging pipe is threadedly connected to the lower part of the upper cover. A plug rod is slidably connected to the lower part of the plugging pipe. A second cylinder for driving the plug rod to slide is fixedly connected to the plugging pipe upper cover. A through hole for the second cylinder to pass through is arranged in the middle of the upper plate.

[0008] Further, the outer wall diameter of the plugging pipe is the same as the inner wall diameter of the converging pipe.

[0009] Further, it also includes a mounting pipe fixedly connected to the converging pipe. An L-shaped frame is arranged on the mounting pipe. A limiting frame is fixedly connected to the lower part of the mounting pipe. A third cylinder is fixedly connected to the L-shaped frame. A cutting-off plate slidably connected to the limiting frame is fixedly connected to the cylinder rod of the third cylinder. A V-shaped groove is arranged at the free end of the cutting-off plate.

[0010] Further, the mold component includes a bottom pipe. A fixed mold is arranged on the bottom pipe. Two first rods are fixedly connected to the upper part of the fixed mold. A movable mold is slidably connected to the two first rods. A spring for pushing the movable mold to fit the fixed mold is arranged at the end of each first rod. Two second rods are fixedly connected to the lower part of each fixed mold. Through holes corresponding to the two second rods are arranged at the lower part of the movable mold. A forming cavity for forming plastic bottles is arranged in the middle when the fixed mold and the movable mold are fitted.

[0011] Further, the transportation component includes two synchronous wheels and a chassis for mounting the two synchronous wheels. The two synchronous wheels are driven by a synchronous belt, and a plurality of transportation holes for placing the bottom pipes are provided on the synchronous belt.

[0012] Further, the synchronous wheel is a spur gear, and the synchronous belt is a toothed synchronous belt provided with teeth meshing with the straight teeth of the synchronous wheel.

[0013] Further, a support plate corresponding to the pressurizing pipe up and down is fixedly connected to the chassis.

[0014] Further, a side frame is fixedly connected to the support plate. Two lead screws are rotatably connected to the side frame. A lead screw nut is connected to each lead screw. A lifting plate is fixedly connected to the two lead screw nuts. A rotary frame is rotatably connected to the lifting plate. The pressurizing pipe is fixedly connected to the rotary frame. A third gear is fixedly connected to the rotary frame. A fourth gear for driving the third gear to rotate is rotatably connected to the lifting plate.

[0015] Further, two fourth cylinders are fixedly connected to the upper frame. A ring plate is fixedly connected to the cylinder rods of the two fourth cylinders. The ring plate is slidably connected to the mixing barrel and the middle pipe. Threaded holes are provided on the ring plate, and a feeding cover is connected to the threaded holes of the ring plate.

[0016] The beneficial effects of the plastic recycling and plastic bottle forming device of the present invention are as follows: The pipe for transporting high-pressure air extends into the mold for forming plastic bottles, and under rotation, uniformly pressurizes the recycled and reused molten plastic processed into a cup shape in the mold from all around and below, for the uniform forming of plastic bottles; It can also press the molten plastic into a cup shape for quantitative feeding, push it into the mold, and perform pre-processing for the subsequent pressurized forming of plastic bottles, accelerating the preparation speed of plastic bottles; It can also quickly form and discharge plastic bottles through the rapid disassembly, installation, and placement of the mold, accelerating the preparation speed of plastic bottles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present invention in detail with reference to the drawings and specific implementation methods.

[0018] Figure 1 It is a schematic structural diagram of a forming device for plastic recycling and plastic bottle preparation;

[0019] Figure 2 It is a schematic structural diagram of stirring and melting plastic mixture;

[0020] Figure 3 It is a schematic diagram of pushing plastic for feeding;

[0021] Figure 4 It is a schematic structural diagram of quantitatively pushing plastic for feeding;

[0022] Figure 5 It is a schematic diagram of the position of the internal structure in the middle pipe;

[0023] Figure 6 Schematic diagram of the positions of the blocking pipe and the plug rod;

[0024] Figure 7 Schematic diagram of the structure of the plug rod;

[0025] Figure 8 Schematic diagram of the structure of the sealing and converging pipe;

[0026] Figure 9 Schematic diagram of the structure of the transportation mold assembly;

[0027] Figure 10 Schematic diagram of the structure of the mold assembly;

[0028] Figure 11 Schematic diagram of the plastic bottle pressurized forming by the transportation mold assembly;

[0029] Figure 12 Schematic diagram of the structure of the pressurized plastic formed into a plastic bottle;

[0030] Figure 13 Schematic diagram of the structure for driving the pressurizing pipe to rotate;

[0031] Figure 14 Schematic diagram of the structures of the pressurizing pipe and the reducing pipe.

[0032] In the figure: chassis 11; positioning frame 12; mixing barrel 13; converging pipe 14; synchronous pulley 15; synchronous belt 16; transportation hole 17; support plate 18; side frame 19; upper frame 21; fourth cylinder 22; ring plate 23; feeding cover 24; middle pipe 31; spiral blade 32; first gear 33; second gear 34; positioning plate 35; pressing plate 36; sleeve 41; lower plate 42; upper plate 43; first cylinder 44; blocking pipe upper cover 45; blocking pipe 46; second cylinder 47; plug rod 48; installation pipe 51; limiting frame 52; L-shaped frame 53; third cylinder 54; cutting plate 55; V-groove 56; bottom pipe 61; fixed mold 62; first rod 63; spring 64; second rod 65; movable mold 66; lead screw 71; lead screw nut 72; lifting plate 73; slewing frame 74; pressurizing pipe 75; reducing pipe 76; third gear 81; fourth gear 82. Detailed implementation manners

[0033] Refer to Figure 1 、 11 、12, 13 and 14, and the embodiments of recycling waste plastics and reprocessing them into plastic bottles will be described in detail:

[0034] A molding device for preparing plastic bottles by plastic recycling, comprising a recycling component for melting and mixing waste plastics and a feeding component arranged on the recycling component to push the melted plastics for quantitative feeding. A transportation component for transporting materials is arranged at the lower part of the recycling component. The transportation component transports a mold component for preparing plastic bottles. The mold components transported by the transportation component stay intermittently below the recycling component. The transportation component transports the mold component loaded with the melted plastics to below the pressurizing component. The pressurizing component includes a pressurizing pipe 75 capable of linear movement along its own axis. The pressurizing pipe 75 can rotate around its own axis. Multiple rows of pressurizing holes are evenly distributed on the outer wall of the pressurizing pipe 75. The multiple rows of pressurizing holes are arranged in a staggered manner in the vertical direction. The upper part of the pressurizing pipe 75 is rotatably connected to a variable-diameter pipe 76. The upper diameter of the variable-diameter pipe 76 is larger than the lower diameter. The variable-diameter pipe 76 is communicated with the output pipe of an air compressor.

[0035] The waste plastics are added into the recycling component for processing. A heating component is sleeved outside the recycling component. The heating component is communicated with a heating furnace. High-temperature steam is circulated and supplied into the heating component through the heating furnace. Heat exchange is carried out between the high-temperature steam and the recycled waste plastics to melt the waste plastics. The temperature of the high-temperature steam is usually 350°C - 800°C, and the melting temperature of the plastics is less than 300°C under normal conditions, so as to ensure the full melting of the plastics. The melted waste plastics can be added with other materials for plastic modification, and the plastic raw materials are fully mixed by stirring. The melted plastics are fed through the lower part of the recycling component.

[0036] The melted plastics fall into the lower mold component for loading. The mold component is used for molding plastic bottles. The mold components are transported through the timed movement of the transportation component. When the transportation component is intermittent, the mold components can be installed on the transportation component, or the plastics loaded and processed in the mold components can be molded into plastic bottles, and then the mold components loaded with plastic bottles can be unloaded. During the process of the transportation component transporting the mold components, the mold components can be accurately positioned below the recycling component for quantitative loading of the melted plastics, and then the mold components loaded with the melted plastics are positioned and transported to below the pressurizing pipe 75.

[0037] The driving pressure pipe 75 extends into the middle of the plastic raw material in the mold assembly. High-pressure air is supplied into the variable-diameter pipe 76 by an external air compressor. The high-pressure air flows into the pressure pipe 75 through the variable-diameter pipe 76. Through holes are provided at the lower part of the pressure pipe 75, and pressure is applied to the outside through the pressure holes on the outside of the pressure pipe 75 and the through holes at the lower part, and balanced pressing is carried out in the mold assembly to form plastic bottles. At the same time, the driving pressure pipe 75 is driven to rotate around its own axis, so as to ensure that multiple pressure holes on the outer wall of the pressure pipe 75 can fully output high-pressure air to the surrounding area during rotation, preventing uneven pressure applied to the surrounding area when multiple pressure holes output high-pressure air, which affects the preparation of plastic bottles, and ensuring that plastic is recycled and made into plastic bottles. The variable-diameter pipe 76 can ensure that when the high-pressure air provided by the air compressor is output from the pressure pipe 75 after transportation, the provided pressure can be ensured. Through the change that the diameter of the upper part of the variable-diameter pipe 76 is larger than that of the lower part, the pressure of the high-pressure air can be ensured to be sufficient to achieve the effect of pressing plastic bottles, preventing the pressure of the high-pressure air provided by the air compressor from being insufficient, and ensuring that the pressure of the high-pressure air is sufficient. When pressing different plastic bottles, different pressures are required. By selecting a low-pressure air compressor, a pressure of 10 Kg can be provided, which is suitable for pressing plastic bottles with a capacity of less than 2 liters. A medium-high pressure air compressor can also be selected, which can provide a pressure of 3.7 - 4 MPa and is suitable for pressing plastic bottles with a large capacity. It is also possible to select a suitable air compressor from a low-pressure air compressor, a medium-high pressure air compressor, and a high-pressure air compressor according to different plastic materials for the preparation of plastic bottles.

[0038] Reference Figure 1 、 2 、4, 5, 6, and 7 to describe in detail the embodiments of recycling waste plastics for feeding:

[0039] The recycling component includes a mixing barrel 13. A converging pipe 14 is arranged at the lower part of the mixing barrel 13. An upper frame 21 is fixedly connected to the upper part of the mixing barrel 13. A middle pipe 31 is rotatably connected to the middle of the upper frame 21. A plurality of spiral blades 32 are fixedly connected to the outer wall of the middle pipe 31. A first gear 33 is fixedly connected to the upper part of the middle pipe 31. A second gear 34 for driving the first gear 33 to rotate is rotatably connected to the upper frame 21. A first motor for driving the second gear 34 to rotate is fixedly connected to the upper frame 21. When it is necessary to stir the melted waste plastics, the first motor is started. The first motor drives the second gear 34 to rotate. The second gear 34 rotates and meshes with and drives the first gear 33 to rotate. The first gear 33 rotates and drives the middle pipe 31 to rotate. The middle pipe 31 drives the plurality of spiral blades 32 to rotate. The plurality of spiral blades 32 rotate and push the melted plastics to move, so as to disperse the waste plastics during recycling and reuse, ensure the uniformity of the properties of the recycled plastics, and guarantee the quality of the plastic bottles prepared from the recycled waste plastics. The first motor is controlled by common electronic components in the prior art to ensure that the first motor can be started and stopped according to the usage requirements.

[0040] A positioning plate 35 is arranged at the lower part of the inner wall of the middle pipe 31. A pressing plate 36 is threadedly connected to the upper part of the inner wall of the middle pipe 31. A sleeve 41 is arranged between the positioning plate 35 and the pressing plate 36. A lower plate 42 that fits with the upper part of the positioning plate 35 is arranged at the lower part of the sleeve 41. An upper plate 43 is threadedly connected to the upper part of the sleeve 41. Two first cylinders 44 are fixedly connected to the upper plate 43. A plugging pipe upper cover 45 is fixedly connected to the cylinder rods of the two first cylinders 44. A plugging pipe 46 is threadedly connected to the lower part of the upper cover 45. A plug rod 48 is slidably connected to the lower part of the plugging pipe 46. A second cylinder 47 for driving the plug rod 48 to slide is fixedly connected to the plugging pipe upper cover 45. A through hole for the second cylinder 47 to pass through is arranged in the middle of the upper plate 43.

[0041] The positioning plate 35 at the lower part of the inner wall of the middle pipe 31 is used to position the installed lower plate 42. The diameter of the lower plate 42 is the same as the inner wall diameter of the middle pipe 31, which can ensure the stability of the lower plate 42 and prevent it from shaking. The pressing plate 36 can position the structure composed of the sleeve 41, the lower plate 42 and the upper plate 43 to ensure that the sleeve 41, the lower plate 42 and the upper plate 43 will not move in the vertical direction. When the materials are mixed, the plugging pipe 46 coincides with the converging pipe 14, and the plugging pipe 46 plugs the converging pipe 14 to prevent the mixed plastics from flowing into the converging pipe 14 and resulting in insufficient mixing. The plug rod 48 extends relative to the plugging pipe 46.

[0042] When plastic blanking is required, two first cylinders 44 are started. The cylinder rods of the two first cylinders 44 drive the blanking pipe upper cover 45 to rise. The blanking pipe upper cover 45 drives the blanking pipe 46 to rise, and the blanking pipe 46 loses the blockage of the converging pipe 14, so as to ensure that the melted plastic falls into the space between the lower converging pipe 14 and the plug rod 48 for quantitative blanking. When blanking is required, two first cylinders 44 are started. The cylinder rods of the two first cylinders 44 drive the blanking pipe upper cover 45 to descend. The blanking pipe upper cover 45 drives the blanking pipe 46 and the second cylinder 47 to lift and lower. The expansion and contraction of the cylinder rod of the second cylinder 47 can drive the plug rod 48 to move relative to the blanking pipe 46, so as to adjust the length of the plug rod 48 extending relative to the blanking pipe 46. Thus, the blanking pipe 46 and the plug rod 48 can be driven by the blanking pipe upper cover 45 to synchronously push the plastic in the converging pipe 14 for quantitative blanking, so as to ensure that the recycled waste plastic is quantitatively blanked for the processing of plastic bottles of the same specification. After blanking, first start the second cylinder 47 to drive the plug rod 48 to retract relative to the blanking pipe 46. By blocking the plastic with the blanking pipe 46, the separation of the plug rod 48 from the blanking plastic is ensured. Then start the two first cylinders 44 to drive the blanking pipe upper cover 45 to reset, and then the blanking pipe upper cover 45 drives the blanking pipe 46 and the second cylinder 47 to reset, preparing for the next quantitative blanking of plastic. The first cylinder 44 and the second cylinder 47 are controlled by commonly used electronic components in the prior art to ensure that the first cylinder 44 and the second cylinder 47 can be started and closed according to the usage requirements, and the output and retraction of the cylinder rod are controlled.

[0043] Reference Figure 4 , a detailed description of the embodiment of quantitatively dividing materials for blanking:

[0044] The outer wall diameter of the blanking pipe 46 is the same as the inner wall diameter of the converging pipe 14, so that the blanking pipe 46 can extend into the converging pipe 14 to block the converging pipe 14, and the blanking of the melted plastic can be controlled by the separation and coincidence of the blanking pipe 46 and the converging pipe 14.

[0045] Reference Figure 8 , a detailed description of the embodiment of pre-processing for plastic bottle forming by quantitative blanking:

[0046] It further includes an installation pipe 51 fixedly connected to the converging pipe 14. An L-shaped frame 53 is arranged on the installation pipe 51. A limiting frame 52 is fixedly connected to the lower part of the installation pipe 51. A third cylinder 54 is fixedly connected to the L-shaped frame 53. A cutting plate 55 slidably connected to the limiting frame 52 is fixedly connected to the cylinder rod of the third cylinder 54. A V-shaped groove 56 is arranged at the free end of the cutting plate 55.

[0047] When melting plastics are mixed, at this time, the cylinder rod of the third cylinder 54 is in the extended state. The cylinder rod of the third cylinder 54 drives the cutting-off plate 55 to fit against the lower end of the converging tube 14 within the limit frame 52, thereby forming a cup-shaped container composed of the converging tube 14 and the cutting-off plate 55 for the quantitative feeding of the melting plastics. When the upper part of the converging tube 14 is blocked by the blocking tube 46, the plug rod 48 is synchronously driven to extend, extruding the melting plastics in the converging tube 14 into a cup shape with a blind hole in the middle, which is convenient for subsequent pressure forming processing of the quantitative melting plastics. When feeding, the cylinder rod of the third cylinder 54 is started to reset, and the cylinder rod of the third cylinder 54 drives the cutting-off plate 55 to retract, so that the plastics can be fed;

[0048] After the feeding is complete, after the blocking tube 46 and the plug rod 48 both return to the converging tube 14, the third cylinder 54 is started. The cylinder rod of the third cylinder 54 drives the cutting-off plate 55 to slide into the limit frame 52 to re-block the lower end of the converging tube 14, preparing for the next quantitative feeding of plastics. The setting of the V-groove 56 makes both the upper and lower parts of the free end of the cutting-off plate 55 be blades, which can scrape and clean the excess plastic residue at the lower end of the converging tube 14, and can also prevent the plastic residue in the limit frame 52 from affecting the sliding of the cutting-off plate 55.

[0049] Reference Figure 1 、 9 、10 and 11, a detailed description of the embodiment of forming a plastic bottle with the pressure-melted plastics in the mold assembly:

[0050] The mold assembly includes a bottom tube 61. A fixed mold 62 is arranged on the bottom tube 61. Two first rods 63 are fixedly connected to the upper part of the fixed mold 62. A movable mold 66 is slidably connected to the two first rods 63. A spring 64 for pushing the movable mold 66 to fit against the fixed mold 62 is arranged at the end of each first rod 63. Two second rods 65 are fixedly connected to the lower part of each fixed mold 62. Through holes corresponding to the two second rods 65 are arranged at the lower part of the movable mold 66. When the fixed mold 62 and the movable mold 66 are fitted, a forming cavity for forming a plastic bottle is arranged in the middle.

[0051] The bottom tube 61 is cup-shaped, enabling stable and steady placement of the moving mold 66 and the fixed mold 62 without deviation or wobbling. Thus, when the spring 64 pushes the moving mold 66 against the fixed mold 62, the combined moving and fixed molds 66 and 62 are placed within the bottom tube 61 for restraint, preventing separation of the plastic within the moving and fixed molds 66 and 62 due to the applied pressure during plastic bottle forming. After the plastic bottle is formed, the moving and fixed molds 66 and 62 are separated from the bottom tube 61, then the moving mold 66 is manually pulled to slide and compress the spring 64 to remove the formed plastic bottle. Then, the moving mold 66 is released, and under the push of the compressed spring 64, the moving mold 66 is pushed against the fixed mold 62 to prepare for the next plastic bottle forming. The two second rods 65 can increase the accuracy when the moving mold 66 and the fixed mold 62 are in contact, ensuring the yield rate of the formed plastic bottles.

[0052] Reference Figure 1 、 9 and 11, to describe in detail an embodiment of the transportation mold assembly:

[0053] The transportation assembly includes two synchronous wheels 15 and a chassis 11 for mounting the two synchronous wheels 15. The two synchronous wheels 15 are driven by a synchronous belt 16. A plurality of transportation holes 17 for placing the bottom tube 61 are provided on the synchronous belt 16. A positioning frame 12 is fixedly connected to the chassis 11, and the mixing barrel 13 is fixedly connected to the positioning frame 12. The synchronous wheel 15 away from the positioning frame 12 is fixedly connected to the output shaft of the second motor, and the second motor is fixedly connected to the chassis 11;

[0054] When the second motor is started, the output shaft of the second motor drives the fixedly connected synchronous wheel 15 to rotate. This synchronous wheel 15 cooperates with the other synchronous wheel 15 to drive the synchronous belt 16 to move. The transportation holes 17 on the synchronous belt 16 are used to place the bottom tube 61 to achieve the transportation of the mold assembly. The second motor is controlled by commonly used electronic components in the prior art to ensure that the second motor can be started and stopped according to the usage requirements. Thus, the number of rotation turns of the output shaft of the second motor is controlled, thereby controlling the number of rotation turns of the synchronous wheel 15, and further controlling the transportation distance of the synchronous belt 16, so as to achieve the periodic transportation of the mold assembly within the multiple transportation holes 17 on the synchronous wheel 15.

[0055] Reference Figure 11 , to describe in detail an embodiment of precisely controlling the transportation distance of the synchronous belt 16:

[0056] The synchronous pulley 15 is a spur gear, and the synchronous belt 16 is a toothed synchronous belt provided with teeth that mesh directly with the spur gear of the synchronous pulley 15. Thus, transportation can be carried out through the teeth of the toothed synchronous belt and the teeth of the synchronous pulley 15, which can increase the accuracy of the movement distance of the synchronous belt 16. Compared with the synchronous belt that relies on friction for transportation, it has better precision and can ensure the position where the mold assembly transported on the synchronous belt 16 stops. It can accurately feed the melted plastic into the mold assembly that stops below the converging tube 14 and can accurately stop the mold assembly loaded with plastic below the pressure tube 75. After being driven, the pressure tube 75 extends into the cup-shaped plastic in the mold assembly for pressurization to complete the processing of plastic bottles.

[0057] Reference Figure 11 and 12 , a detailed example of the embodiment that supports the stable forming process of plastic bottles by the mold assembly is described:

[0058] A support plate 18 corresponding to the pressure tube 75 up and down is fixedly connected to the chassis 11. Thus, the mold assembly transported to the upper part is supported by the support plate 18, and the plastic bottle is formed when the pressure tube 75 applies pressure to the moving mold 66 and the fixed mold 62.

[0059] Reference Figure 1 , 12 , 13 and 14, a detailed example of the embodiment that drives the movement of the pressure tube 75 to cooperate with the mold assembly for plastic bottle forming is described;

[0060] Side frames 19 are fixedly connected to the support plate 18. Two lead screws 71 are rotatably connected to the side frames 19. A lead screw nut 72 is connected to each lead screw 71. A lifting plate 73 is fixedly connected to the two lead screw nuts 72. A rotary frame 74 is rotatably connected to the lifting plate 73. The pressure tube 75 is fixedly connected to the rotary frame 74. A third gear 81 is fixedly connected to the rotary frame 74. A fourth gear 82 that drives the third gear 81 to rotate is rotatably connected to the lifting plate 73. The two lead screws 71 are respectively fixedly connected to the output shafts of their corresponding third motors, and the two third motors are both fixedly connected to the side frames 19; the fourth gear 82 is fixedly connected to the output shaft of the fourth motor, and the fourth motor is fixedly connected to the lifting plate 73;

[0061] When the mold assembly loaded with plastic is transported to the lower part of the pressure pipe 75, two third motors are started. The two third motors drive the two lead screws 71 to rotate. The two lead screws 71 drive the two lead screw nuts 72 to drive the lifting plate 73 to lift and lower. The lifting plate 73 descends and buckles on the upper parts of the moving mold 66 and the fixed mold 62, preventing the upper parts of the moving mold 66 and the fixed mold 62 from separating when the pressure pipe 75 is pressurized, and also enabling the forming of the glass bottle mouth; when the lifting plate 73 descends, it drives the rotary frame 74 to descend. The rotary frame 74 drives the pressure pipe 75 to descend and extend into the cup-shaped plastic inside the moving mold 66 and the fixed mold 62, and the plastic bottle is formed by pressurization. When the pressure pipe 75 descends and extends into the middle of the moving mold 66 and the fixed mold 62, the fourth motor is started. The output shaft of the fourth motor drives the fourth gear 82 to rotate. The fourth gear 82 meshes with and drives the third gear 81 to rotate. The third gear 81 drives the rotary frame 74 to rotate. The rotary frame 74 drives the pressure pipe 75 to rotate. Thus, when the external air compressor supplies high-pressure air into the variable-diameter pipe 76, the high-pressure air flows into the pressure pipe 75 through the variable-diameter pipe 76. There are through holes provided at the lower part of the pressure pipe 75. Pressurization is carried out to the outside through the pressure holes on the outside of the pressure pipe 75 and the through holes at the lower part, and the high-pressure air applied by the pressure pipe 75 is evenly filled into the moving mold 66, the fixed mold 62 and the lifting plate 73 to form the plastic bottle. After the plastic bottle is formed, the output shafts of the two third motors rotate in the reverse direction, so that the two lead screw nuts 72 are driven by the rotation of the two lead screws 71 to drive the lifting plate 73 to reset, and then drive the rotary frame 74 and the pressure pipe 75 to reset, so that the synchronous belt 16 can continue to transport the mold assembly and prepare for the next plastic bottle forming. The two third motors and the fourth motor are controlled by the commonly used electronic components in the prior art to ensure that the two third motors and the fourth motor can rotate forward, reverse and stop according to the usage requirements; thereby controlling the lifting and rotation of the pressure pipe 75 to ensure the full forming of the plastic bottle.

[0062] Reference Figure 1 and 3 , and an embodiment for ensuring the extrusion and feeding of the molten plastic is described in detail:

[0063] Two fourth cylinders 22 are fixedly connected to the upper rack 21. A ring plate 23 is fixedly connected to the cylinder rods of the two fourth cylinders 22. The ring plate 23 is slidably connected to the mixing barrel 13 and the middle pipe 31. Threaded holes are provided on the ring plate 23, and a feeding cover 24 is connected to the threaded holes of the ring plate 23. Thus, the broken waste plastics can be added by removing the feeding cover 24. After the addition, the mixing barrel 13 is sealed by installing the feeding cover 24. When the mixed plastics are discharged, by starting the two fourth cylinders 22, the cylinder rods of the two fourth cylinders 22 drive the ring plate 23 to descend, and the ring plate 23 pushes the plastics at the lower part for discharging. After the multiple spiral blades 32 rotate, they can push the plastics for discharging, and the sliding of the ring plate 23 can scrape the plastics attached to the mixing barrel 13 and the middle pipe 31 for discharging, and can also scrape the plastics under the ring plate 23 by the rotation of the multiple spiral blades 32 for discharging.

Claims

1. A molding device for recycling plastics to prepare plastic bottles, comprising a recycling component for melting and mixing waste plastics and a feeding component arranged on the recycling component to push the melted plastic to be quantitatively fed, a transport component for transporting materials is arranged at the lower part of the recycling component, the transport component transports a mold component for preparing plastic bottles, the mold component transported by the transport component stops at intervals below the recycling component, and the transport component transports the mold component loaded with melted plastic to the lower part of the pressurizing component, characterized in that: The pressurizing component includes a pressurizing tube that can move linearly along its own axis. The pressurizing tube can rotate around its own axis. Multiple rows of pressurizing holes are evenly distributed on the outer wall of the pressurizing tube. The multiple rows of pressurizing holes are staggered in the vertical direction. The upper part of the pressurizing tube is rotatably connected to a reducer. The upper diameter of the reducer is larger than the lower diameter. The reducer is connected to the output pipe of the air compressor.

2. A plastic recycling and plastic bottle forming device according to claim 1, characterized in that: The recycling assembly comprises a mixing barrel, a convergence tube is arranged at the lower part of the mixing barrel, an upper frame is fixedly connected to the upper part of the mixing barrel, a middle tube is rotatably connected to the middle part of the upper frame, a plurality of spiral blades are arranged on the outer wall of the middle tube, a first gear is fixedly connected to the upper part of the middle tube, and a second gear driving the first gear to rotate is rotatably connected to the upper frame; A positioning plate is provided at the lower part of the inner wall of the middle tube, a pressure plate is threadedly connected to the upper part of the inner wall of the middle tube, a sleeve is provided between the positioning plate and the pressure plate, a lower plate which fits with the upper part of the positioning plate is provided at the lower part of the sleeve, an upper plate is threadedly connected to the upper part of the sleeve, two first cylinders are fixedly connected to the upper plate, a blocking tube upper cover is fixedly connected to the cylinder rods of the two first cylinders, a blocking tube is threadedly connected to the lower part of the upper cover, a plug rod is slidably connected to the lower part of the blocking tube, a second cylinder which drives the plug rod to slide is fixedly connected to the blocking tube upper cover, and a through hole for accommodating the second cylinder to pass through is provided in the middle part of the upper plate.

3. A plastic recycling and plastic bottle forming device according to claim 2, characterized in that: The outer wall diameter of the blocking tube is the same as the inner wall diameter of the converging tube.

4. A plastic recycling and plastic bottle forming device according to claim 2, characterized in that: It also includes a mounting tube fixedly connected to the convergence tube, an L-frame is arranged on the mounting tube, a limit frame is fixedly connected to the lower part of the mounting tube, a third cylinder is fixedly connected to the L-frame, a cut-off plate slidably connected to the limit frame is fixedly connected to the cylinder rod of the third cylinder, and a V-groove is arranged on the free end of the cut-off plate.

5. The molding device for recycling plastics to prepare plastic bottles according to claim 2, characterized in that: The mold assembly includes a bottom tube, on which a fixed mold is arranged, two first rods are fixedly connected to the upper part of the fixed mold, a movable mold is slidably connected to the two first rods, a spring for pushing the movable mold to fit the fixed mold is arranged at the end of each first rod, two second rods are fixedly connected to the lower part of each fixed mold, the lower part of the movable mold is arranged with through holes corresponding to the two second rods, and a molding cavity for molding a plastic bottle is arranged in the middle part when the fixed mold and the movable mold are fitted.

6. A plastic recycling and forming device for preparing plastic bottles according to claim 5, characterized in that: The transport assembly comprises two synchronous wheels and a base frame on which the two synchronous wheels are mounted. The two synchronous wheels are driven by a synchronous belt, and the synchronous belt is provided with a plurality of transport holes for placing bottom tubes.

7. A plastic recycling and forming device for preparing plastic bottles according to claim 6, characterized in that: The synchronous wheel is a spur gear, and the synchronous belt is a toothed synchronous belt provided with spur teeth meshing with the synchronous wheel.

8. The molding device for recycling plastics to prepare plastic bottles according to claim 6, characterized in that: The bottom frame is fixedly connected with a support plate corresponding to the upper and lower parts of the pressure pipe.

9. A plastic recycling and forming device for preparing plastic bottles according to claim 8, characterized in that: The support plate is fixedly connected to a side frame, and two screw rods are rotatably connected to the side frame, each screw rod is connected to a screw nut, and a lifting plate is fixedly connected to the two screw nuts, and a rotating frame is rotatably connected to the lifting plate. The pressure tube is fixedly connected to the rotating frame, and a third gear is fixedly connected to the rotating frame, and a fourth gear that drives the third gear to rotate is rotatably connected to the lifting plate.

10. The molding device for recycling plastics to prepare plastic bottles according to claim 2, characterized in that: Two fourth cylinders are fixedly connected to the upper frame, and ring plates are fixedly connected to the cylinder rods of the two fourth cylinders. The ring plates are slidably connected to the mixing barrel and the middle pipe. Threaded holes are arranged on the ring plates, and a material adding cover is connected to the threaded holes of the ring plates.

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