A vertical injection molding machine and an injection molding method for processing skateboard accessories

Abstract

The present invention relates to the technical field of injection molding equipment, and discloses a vertical injection molding machine and an injection molding method for processing skateboard accessories. The vertical injection molding machine includes a device main body, an injection molding unit, a waste chip collection unit and a positioning unit are arranged on the device main body. The injection molding unit includes an upper injection mold, and the positioning unit includes an upper fixing ring. A plurality of storage grooves are formed on the inner wall surface of the upper fixing ring; by providing a plurality of groups of cleaning mechanisms inside the upper fixing ring, after the injection molded part is cooled, the lower injection mold ejects the injection molded part, and the burrs on the outer side of the injection molded part will come into contact with the burr scraping knives in the cleaning mechanism, so that the burr scraping knives scrape the burrs on the outer side of the injection molded part downward, cleaning the burrs on the outer side of the injection molded part. There is no need for staff to perform secondary cleaning again, reducing the labor intensity of the staff and improving the comfort of use for the staff.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and specifically to a vertical injection molding machine and an injection molding method for processing skateboard accessories. Background Art

[0002] A vertical injection molding machine is a plastic injection molding device. It is mainly used to heat and melt thermoplastic or thermosetting plastics and then inject them into a closed mold under high pressure. After cooling and solidifying, plastic products with the required shape and size are formed. During the production of skateboard accessories, plastic accessories such as skateboard wheels and bracket bushings are usually injection-molded by an injection molding machine for the sake of production efficiency. However, after the injection molding, there will be a certain gap between the upper mold and the lower mold, resulting in plastic burrs on the outer side of the injection-molded skateboard wheels. Workers need to perform secondary grinding and cleaning before they can be installed on the skateboard, which increases the work process and labor intensity of the workers.

[0003] Among them, Chinese Patent Application CN116766536A proposes an ejection structure of a vertical hot-press injection molding machine, including an outer shell of the injection molding machine base. At the bottom of the inner wall of the outer shell of the injection molding machine base, there is a push plate lifting device with an execution end extending to the upper part of the outer shell of the injection molding machine base. On one side of the top of the outer shell of the injection molding machine base, there is a plastic part translation and unloading device. On the side of the outer shell of the injection molding machine base away from the plastic part translation and unloading device, there is a lifting scraping device. The push plate lifting device includes a driving cylinder vertically arranged at the bottom of the inner wall of the outer shell of the injection molding machine base, an outer sleeve tube arranged at the execution end of the driving cylinder, a square block slidably connected to the inner wall of the outer sleeve tube, a lifting tube with its bottom end connected to the upper surface of the square block and its top end penetrating through the outer shell of the injection molding machine base, and an elastic buffer component arranged at the top of the lifting tube. This patent cleans and grinds the edge of the injection-molded product on the way after the injection molding is ejected and then moved to the collection box. However, this patent is only applicable to rectangular injection-molded products and cannot grind some arc-shaped or circular injection-molded products. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a vertical injection molding machine and an injection molding method for processing skateboard accessories, which have the advantages of automatically cleaning the burrs on the edge of plastic parts and cleaning the residue inside the mold, and solve the problems of the vertical injection molding machine.

[0005] To solve the above technical problems of the vertical injection molding machine, the present invention provides the following technical solution: A vertical injection molding machine, including a device main body, on which an injection molding unit, a waste chip collection unit, and a positioning unit are provided. The injection molding unit includes an upper injection mold. The positioning unit includes an upper fixing ring. The inner wall surface of the upper fixing ring is provided with a plurality of storage grooves, and a cleaning mechanism is arranged in each storage groove. The cleaning mechanism includes a semi-circular rotating plate, which is rotationally matched with the inner wall of the storage groove and a torsion spring is arranged at the rotational matching position. A burr scraper is arranged on the outer side of the semi-circular rotating plate. A top-out unit is arranged below the fixing ring, and the top-out unit includes a lower injection mold;

[0006] During the mold closing process, when the upper injection mold descends, it contacts the top of the semi-circular rotating plate extending from the storage groove, causing the semi-circular rotating plate to be squeezed and turn into the interior of the storage groove;

[0007] During the mold opening process, the semi-circular rotating plate rotates and resets under the action of the torsion spring, so that the inner wall of the upper fixing ring is covered with burr scrapers that can cover the complete cross-sectional shape of the upper injection mold. When the lower injection mold ejects the injection molded part, the burr scrapers contact the outer surface of the injection molded part to scrape off burrs. An outer guiding ring is arranged at the bottom of the upper fixing ring, and the scraped burr waste can enter the waste chip collection unit through the outer guiding ring for collection.

[0008] Preferably, the device main body includes a top plate. The injection molding unit includes a material taking turntable arranged on the top of the top plate. A positioning column is arranged on the top of the material taking turntable. A lifting driving mechanism and an injection molding component are arranged on the top of the positioning column. The output end of the lifting driving mechanism is fixedly connected with an injection molding plate, and an upper injection mold is arranged at the bottom of the injection molding plate.

[0009] Preferably, a rotating column is coaxially and fixedly connected to the surface of the semi-circular rotating plate. The rotating column is rotatably installed on the inner wall of the storage groove. Torsion clamping plates are fixedly connected to the outer sides of both ends of the rotating column. The torsion springs are respectively sleeved on the outer sides of both ends of the rotating column, and both ends of the torsion spring are fixedly connected with the torsion clamping plate and the inner wall of the storage groove respectively.

[0010] Preferably, the top-out unit further includes a top-out hydraulic column. The lower injection mold is fixedly installed on the top of the top-out hydraulic column. A cleaning spring column is arranged on the outer side of the top-out hydraulic column, and a residue scraper is arranged at one end of the cleaning spring column.

[0011] Preferably, the waste chip collection unit includes a mold plate arranged on the material taking turntable. A guiding inclined plate is arranged at the bottom of the mold plate. A guiding frame is arranged on one side of the guiding inclined plate. A collecting ring is arranged at one end of the guiding frame, and a collecting pipe is arranged at one end of the collecting ring.

[0012] Preferably, the positioning unit further includes an inner injection molding ring. The upper fixing ring, the outer guiding ring, and the inner injection molding ring are fixedly connected inside the mold plate from top to bottom, and the inner diameter of the inner injection molding ring is smaller than that of the upper fixing ring.

[0013] Preferably, the opening of the outer guiding ring is inclined, so that the scrap burrs scraped off can fall to the opening of the outer guiding ring and slide down along the inclined opening to the guiding inclined plate.

[0014] Preferably, a base is provided at the bottom of the top plate. A service chassis is provided on one side of the base. A protective frame surrounding the top plate is provided on the top of the base, and a control panel is provided on the outside of the protective frame.

[0015] The present invention also discloses an injection molding method for skateboard accessory processing, which uses the above-mentioned vertical injection molding machine.

[0016] Compared with the prior art, the present invention provides a vertical injection molding machine and an injection molding method for skateboard accessory processing, having the following beneficial effects:

[0017] 1. For the vertical injection molding machine and the injection molding method for skateboard accessory processing, by providing multiple cleaning mechanisms inside the upper fixing ring, after the plastic part is cooled, the lower injection mold ejects the plastic part, and the burrs on the outer side of the injection molded part will come into contact with the burr scraping knives on the outer side of the semi-circular rotating plate, so that the burr scraping knives scrape off the burrs on the outer side of the injection molded part downward, thereby cleaning and polishing the periphery of the injection molded part, cleaning the burrs on the outer side of the injection molded part, and thus eliminating the need for workers to perform secondary cleaning, reducing the labor intensity of workers, and improving the comfort of workers.

[0018] 2. For the vertical injection molding machine and the injection molding method for skateboard accessory processing, by providing a residue scraping knife outside the ejecting hydraulic column, when the lower injection mold ejects the plastic part, the residue scraping knife scrapes and cleans the plastic part residue or debris remaining in the inner injection molding ring, preventing the plastic part residue or debris remaining in the inner injection molding ring from affecting the next injection molding production and causing defects in the plastic parts produced in the next injection molding production, thereby improving the yield rate of plastic part production and reducing the production cost of plastic parts.

[0019] 3. For the vertical injection molding machine and the injection molding method for skateboard accessory processing, the scraped burrs are discharged through the outer guiding ring. Thus, when the burr scraping knives clean the burrs of the injection molded part, the scraped burrs can fall into the opening of the outer guiding ring, so that the plastic burrs and debris can fall outward along the opening on the outside of the outer guiding ring to the top inclined surface of the guiding inclined plate, and then the plastic burrs or debris automatically move to one end of the guiding frame under the action of gravity and fall into the collecting ring, and finally fall out from the collecting pipe and are collected for secondary utilization, thereby reducing the production cost of injection molded products. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a side schematic diagram of the overall structure of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the waste chip collection unit of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the positioning unit of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the cleaning mechanism of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the ejecting unit of the present invention;

[0026] Figure 7 is a cross-sectional view of the structure of the waste chip collection unit of the present invention;

[0027] Figure 8 is a schematic diagram of the structure of the upper mold of the present invention.

[0028] In the figure: 1. Equipment main body; 11. Base; 12. Service chassis; 13. Control panel; 14. Top plate; 15. Protection frame; 2. Injection molding unit; 21. Material taking turntable; 22. Positioning column; 23. Lifting drive mechanism; 24. Injection molding assembly; 25. Injection molding plate; 26. Upper injection mold; 3. Waste chip collection unit; 31. Mold plate; 32. Guide inclined plate; 33. Guide frame; 34. Collection ring; 35. Collection pipe; 4. Positioning unit; 41. Upper fixing ring; 42. Outer guide ring; 43. Inner injection ring; 5. Cleaning mechanism; 51. Rotating column; 52. Torsion clamping plate; 53. Torsion spring; 54. Semi-circular rotating plate; 55. Burr scraper; 6. Ejecting unit; 61. Ejecting hydraulic column; 63. Cleaning spring column; 64. Residue scraper; 65. Lower injection mold. Detailed Description of the Invention

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-8, A vertical injection molding machine, comprising a device main body 1, on which an injection molding unit 2, a waste chip collection unit 3 and a positioning unit 4 are provided. The injection molding unit 2 includes an upper injection mold 26, and the positioning unit 4 includes an upper fixing ring 41. A plurality of storage grooves are formed on the inner wall surface of the upper fixing ring 41, and a cleaning mechanism 5 is arranged in each storage groove. The cleaning mechanism 5 includes a semi-circular rotating plate 54, which is rotationally matched with the inner wall of the storage groove and a torsion spring 53 is arranged at the rotational matching position. A burr scraper 55 is arranged on the outer side of the semi-circular rotating plate 54. A top-out unit 6 is arranged below the upper fixing ring 41, and the top-out unit 6 includes a lower injection mold 65;

[0031] During the mold closing process, when the upper injection mold 26 descends, it contacts the top of the semi-circular rotating plate 54 extending from the storage groove, causing the semi-circular rotating plate 54 to be squeezed and turn into the interior of the storage groove;

[0032] During the mold opening process, the semi-circular rotating plate 54 rotates and resets under the action of the torsion spring 53, so that the inner wall of the upper fixing ring 41 is covered with burr scrapers 55 that can cover the complete cross-sectional shape of the upper injection mold 26; when the lower injection mold 65 ejects the injection molded part, the burr scrapers 55 contact the outer surface of the injection molded part to scrape off the burrs; an outer guiding ring 42 is arranged at the bottom of the upper fixing ring 41, and the scraped burr waste can enter the waste chip collection unit 3 through the outer guiding ring 42 for collection.

[0033] Furthermore, the device main body 1 includes a top plate 14. The injection molding unit 2 includes a material taking turntable 21 arranged on the top of the top plate 14. A positioning column 22 is arranged on the top of the material taking turntable 21. A lifting drive mechanism 23 and an injection molding component 24 are arranged on the top of the positioning column 22. The output end of the lifting drive mechanism 23 is fixedly connected with an injection molding plate 25, and an upper injection mold 26 is arranged at the bottom of the injection molding plate 25; wherein, the material taking turntable 21 is rotatably installed on the upper surface of the top plate 14, and there are three groups of positioning columns 22, all of which are fixedly connected to the top plate 14. One group of positioning columns 22 is coaxially arranged with the top plate 14 and rotatably penetrates through the material taking turntable 21, and the lifting drive mechanism 23 and the injection molding component 24 are supported by the three groups of positioning columns 22.

[0034] Furthermore, a rotating column 51 is coaxially and fixedly connected to the surface of the semi-circular rotating plate 54. The rotating column 51 is rotatably installed on the inner wall of the storage groove. Torsion clamping plates 52 are fixedly connected to the outer sides of both ends of the rotating column 51. The torsion springs 53 are respectively sleeved on the outer sides of both ends of the rotating column 51, and both ends of the torsion springs 53 are fixedly connected with the torsion clamping plates 52 and the inner wall of the storage groove respectively.

[0035] Among them, during the process of the lifting drive mechanism 23 driving the upper injection mold 26 to move downward for mold closing, the upper injection mold 26 continuously presses the semi-circular rotating plate 54 to rotate downward within the upper fixing ring 41 around the rotating column 51. Furthermore, the rotating column 51 drives the torsion clamping plates 52 on the outer sides of its two ends to press the torsion spring 53 outside the rotating column 51. The other end of the torsion spring 53 is fixed inside the upper fixing ring 41, so that the torsion spring 53 generates a reaction force on the torsion clamping plate 52 until the semi-circular rotating plate 54 is completely pressed into the storage groove. The upper injection mold 26 descends to close with the lower injection mold 65 inside the inner injection ring 43 to achieve mold closing. Then, the injection component 24 injects plastic into the upper injection mold 26. After the injection is completed, the cooling water pipes inside the upper injection mold 26 and the lower injection mold 65 perform water cooling on them, causing the plastic between the two to solidify and form. Then, the lifting drive mechanism 23 is controlled to move the injection plate 25 and the upper injection mold 26 at its bottom upward, so that the upper injection mold 26 and the lower injection mold 65 are separated. When the upper injection mold 26 is moved out of the upper fixing ring 41, at this time, due to the reaction force, the torsion spring 53 inside the upper fixing ring 41 causes the rotating column 51 to drive the semi-circular rotating plate 54 to rotate upward inside the upper fixing ring 41. Furthermore, the burr scraper 55 outside the semi-circular rotating plate 54 faces the center of the upper fixing ring 41, that is, the semi-circular rotating plate 54 drives the burr scraper 55 to rotate and reset to the outside of the storage groove, so that the burr scrapers 55 covering the complete cross-sectional shape of the upper injection mold 26 are distributed on the inner wall of the upper fixing ring 41. After the cooling is completed, there will be some protruding burrs at the four peripheral edges of the plastic part. Furthermore, when the lower injection mold 65 ejects the plastic part, the burrs on the outside of the injection part will come into contact with the burr scrapers 55 outside the semi-circular rotating plate 54, so that the burr scrapers 55 scrape the burrs on the outside of the plastic part downward, thereby cleaning and polishing the four sides of the plastic part, cleaning the burrs on the outside of the plastic part. Furthermore, there is no need for the staff to perform secondary cleaning again, reducing the labor intensity of the staff and improving the comfort of use for the staff. The burrs scraped off by the burr scrapers 55 can fall into the opening of the outer guiding ring 42 for being collected and processed by the waste chip collecting unit 3;

[0036] It should be particularly noted that the injection component 24 is the injection system of a vertical injection molding machine, which is responsible for injecting the plastic melt into the mold. It usually includes a hopper, a screw, a heater, a nozzle, etc. The screw rotates to heat and compress the plastic particles to a high-pressure state, and then injects the molten plastic into the mold through the nozzle.

[0037] Further, the ejection unit 6 further includes an ejection hydraulic column 61. The lower injection mold 65 is fixedly installed at the top of the ejection hydraulic column 61. A cleaning spring column 63 is provided outside the ejection hydraulic column 61, and a residue scraper 64 is provided at one end of the cleaning spring column 63. The residue scraper 64 is extruded outward by the cleaning spring column 63, and the outer side of the residue scraper 64 is attached to the inner wall of the positioning unit 4. The residue scraper 64 is extruded outward by the cleaning spring column 63, and the outer side of the residue scraper 64 is attached to the inner wall of the inner injection ring 43. During the process of the lower injection mold 65 ejecting the injection molded part on its top, the lower injection mold 65 will drive the residue scraper 64 at its bottom to move upward, and the cleaning spring column 63 outside the ejection hydraulic column 61 will extrude the residue scraper 64 to move outward. Thus, during the upward movement of the residue scraper 64, the residue scraper 64 scrapes and cleans the plastic part residues or debris remaining in the inner injection ring 43, preventing the plastic part residues or debris remaining in the inner injection ring 43 from affecting the next injection production and causing the plastic parts produced in the next injection production to be incomplete. Therefore, the yield rate of plastic part production is improved, and the production cost of plastic parts is reduced. When the ejection hydraulic column 61 drives the lower injection mold 65 to rise until the top of the lower injection mold 65 is at the same height as the top of the upper fixing ring 41, the injection molded part is located on the upper surface of the material taking turntable 21, which is convenient for collecting the injection molded part. At this time, the cutting edge of the residue scraper 64 is located at the opening of the outer guiding ring 42, so that the debris scraped from the upper surface of the residue scraper 64 can enter the opening of the outer guiding ring 42 and be collected and processed together by the waste chip collecting unit 3.

[0038] Further, the waste chip collecting unit 3 includes a mold plate 31 provided on the material taking turntable 21. A guiding inclined plate 32 is provided at the bottom of the mold plate 31. A guiding frame 33 is provided on one side of the guiding inclined plate 32. A collecting ring 34 is provided at one end of the guiding frame 33. A collecting pipe 35 is provided at one end of the collecting ring 34. The top of the guiding inclined plate 32 is inclined, so that the plastic burrs or debris falling out from the outer opening of the outer guiding ring 42 automatically move towards one end of the collecting ring 34 under the action of gravity and are thus collected for secondary utilization, thereby reducing the production cost of the injection molded product. Specifically, a dust suction mechanism can be selected to be provided in the guiding frame 33 and the opening of the outer guiding ring 42 according to the actual situation. Under the suction action of the dust suction mechanism, the burrs and waste chips are assisted to be discharged, thereby improving the collection effect.

[0039] Multiple groups of positioning units 4 are distributed on the mold plate 31, and multiple groups of upper injection molds 26 are also correspondingly distributed on the injection plate 25, so that when the lifting drive mechanism 23 drives the injection plate 25 to descend once, the closing of multiple groups of molds can be achieved. And a hydraulic drive mechanism is provided inside the material taking turntable 21, and the hydraulic drive mechanism drives multiple ejection hydraulic columns 61 to lift synchronously, so that when the hydraulic drive mechanism makes one upward drive, multiple injection molded parts can be ejected synchronously.

[0040] Further, the positioning unit 4 further includes an inner injection ring 43. The upper fixing ring 41, the outer guiding ring 42, and the inner injection ring 43 are fixedly connected inside the mold plate 31 in sequence from top to bottom, and the inner diameter dimension of the inner injection ring 43 is smaller than that of the upper fixing ring 41. Among them, the openings on the outer guiding ring 42 are distributed in a circular pattern, and the number is preferably three, so that the central angle corresponding to each opening is close to 120°, facilitating even longer burrs to enter the openings. This enables burrs of different sizes removed to fall onto the top of the guiding inclined plate 32 through the outer guiding ring 42 and then fall into the collection ring 34 for collection, preventing burrs from accumulating inside the upper fixing ring 41 and clogging the equipment inside it, thereby increasing the use safety and stability of the equipment inside the upper fixing ring 41. At the same time, the inner injection ring 43 enables the upper injection mold 26 and the lower injection mold 65 to close inside it, thus forming a sealed space among the three, facilitating the injection assembly 24 to inject into the interior of the three for production.

[0041] Among them, multiple groups of storage grooves are arranged along the axial direction of the upper fixing ring 41, and each group of storage grooves is distributed in a circular pattern on the inner wall of the upper fixing ring 41. When the burr scrapers 55 in each storage groove extend out, the contour formed by the cutting edges of all the burr scrapers 55 is consistent with the cross-sectional shape of the upper injection mold 26. Since the outer contours of the upper injection mold 26, the lower injection mold 65, and the inner injection ring 43 are the same, the cutting edge of each burr scraper 55 is set to be consistent with the outer contour of the upper injection mold 26, enabling the burr scraper 55 to comprehensively scrape the side surface of the injection part when it extends out from the storage groove under the action of the torsion spring 53.

[0042] Further, the openings of the outer guiding ring 42 are inclined, enabling the scraped burr waste to fall onto the openings of the outer guiding ring 42 and slide down along the inclined openings to the guiding inclined plate 32, facilitating the staff to collect the scraped burr waste and thus increasing the use comfort of the staff.

[0043] Further, a base 11 is provided at the bottom of the top plate 14. A service chassis 12 is provided on one side of the base 11, and a protective frame 15 surrounding the top plate 14 is provided on the top of the base 11. A control panel 13 is provided on the outside of the protective frame 15. The rotation speed and time of the material taking turntable 21, the melting temperature inside the injection assembly 24, the quantity and time of injecting into the upper injection mold 26, the maximum distance that the lifting drive mechanism 23 pushes the upper injection mold 26 downward, and the maximum distance that the ejecting hydraulic column 61 jacks up the lower injection mold 65 are set through the control panel 13. The periphery of the material taking turntable 21 is protected by the protective frame 15 to prevent plastic from splashing onto the staff, increasing the use safety and comfort of the staff.

[0044] Working principle: During use, the staff first add appropriate plastic materials into the injection molding component 24 through the pipeline on it, and the injection molding component 24 heats and melts it. Then, the lifting drive mechanism 23 drives the injection molding plate 25 at its bottom end to move downward until the upper injection mold 26 at the bottom of the injection molding plate 25 is inserted into the positioning unit 4 inside the waste chip collection unit 3. During the insertion process, the outer edge of the upper injection mold 26 will collide and squeeze with one end of the semi-circular rotating plate 54. Thus, during the downward movement of the upper injection mold 26, the upper injection mold 26 will continuously squeeze the semi-circular rotating plate 54 to rotate downward around the rotating column 51 inside the upper fixing ring 41. Furthermore, the rotating column 51 drives the torsion clamping plates 52 on the outer sides of its two ends to squeeze the torsion spring 53 outside the rotating column 51, and the other end of the torsion spring 53 is fixed inside the upper fixing ring 41, so that the torsion spring 53 will generate a reaction force on the torsion clamping plate 52. Then, the upper injection mold 26 continues to move downward until the upper injection mold 26 contacts and closes with the top of the lower injection mold 65. At this time, the top of the connection between the lower injection mold 65 and the upper injection mold 26 is just located in the middle of the inner injection ring 43, and at the same time, the lower injection mold 65 and the upper injection mold 26 are closely attached together, thereby reducing the gap between the two. Then, the staff controls the injection molding component 24 to inject into the space between the upper injection mold 26 and the lower injection mold 65 through the control panel 13. After the injection is completed, the cooling water pipes inside the upper injection mold 26 and the lower injection mold 65 will perform water cooling on them, so that the plastic between the two solidifies and forms a shape;

[0045] After the injection molded part is cooled and formed, at this time, the staff controls the lifting drive mechanism 23 through the control panel 13 to move the injection molding plate 25 and the upper injection mold 26 at its bottom upward, so that the upper injection mold 26 and the lower injection mold 65 are separated. When the upper injection mold 26 is moved out of the upper fixing ring 41, at this time, due to the reaction force, the torsion spring 53 inside the upper fixing ring 41 will make the rotating column 51 drive the semi-circular rotating plate 54 to rotate upward inside the upper fixing ring 41. Furthermore, the burr scraping knife 55 on the outside of the semi-circular rotating plate 54 faces the center of the upper fixing ring 41, and the burr scraping knife 55 is adapted to the size of the lower injection mold 65. Then, the motor inside the base 11 controls the material taking turntable 21 on the top of the top plate 14 to rotate until the material taking turntable 21 rotates 180°. At this time, the ejecting hydraulic cylinder 61 is controlled to eject upward. At this time, the lower injection mold 65 ejects the plastic part on its top upward. When the lower injection mold 65 ejects the plastic part, the burrs on the outside of the injection molded part will contact the burr scraping knife 55 on the outside of the semi-circular rotating plate 54, so that the burr scraping knife 55 scrapes the burrs on the outside of the injection molded part downward. Thus, when the lower injection mold 65 ejects the plastic part, multiple cleaning mechanisms 5 clean and polish the four sides of the plastic part, cleaning the burrs on the outside of the plastic part, so that there is no need for the staff to perform secondary cleaning again, reducing the labor intensity of the staff and improving the comfort of use for the staff;

[0046] During the process of the lower injection mold 65 ejecting the plastic part at its top, the lower injection mold 65 will drive the residue scraper 64 at its bottom to move upward, and the cleaning spring column 63 outside the ejecting hydraulic column 61 will squeeze the residue scraper 64 to move outward. Then, during the upward movement of the residue scraper 64, the residue scraper 64 scrapes and cleans the plastic part residue or debris in the residual inner injection ring 43, and the residue scraper 64 ejects the plastic part debris generated by its cleaning upward until the ejecting hydraulic column 61 moves upward to a set distance. At this time, the lower injection mold 65 just ejects the plastic part at its top into the inside of the upper fixing ring 41, and the residue scraper 64 is just located at the opening of the outer guiding ring 42, thus preventing the plastic part residue or debris remaining inside the inner injection ring 43 from affecting the next injection production and causing the plastic part of the next injection production to be incomplete, thereby improving the yield rate of the plastic part production and reducing the production cost of the plastic part;

[0047] During the cleaning process of the burr scraper 55 and the residue scraper 64, the plastic burrs and debris generated by their cleaning will fall downward along the outside of the lower injection mold 65 to the inside of the outer guiding ring 42. And the top outside of the inner injection ring 43 is inclined. At this time, the plastic burrs and debris will fall along the outside of the inner injection ring 43 to the opening of the outer guiding ring 42. Then, the plastic burrs and debris fall outward along the opening on the outside of the outer guiding ring 42 to the top inclined surface of the guiding inclined plate 32. Then, the plastic burrs or debris automatically move to one end of the guiding frame 33 under the action of gravity and fall into the collecting ring 34, and finally fall out from the collecting pipe 35 and are collected and reused, thereby reducing the production cost of the injection product; Since the material taking turntable 21 rotates 180 degrees, at this time, the plastic part ejected by the lower injection mold 65 from the upper fixing ring 41 is located outside the top of the top plate 14. Then, the staff uses a robotic arm or a mechanical push rod to push the plastic part at the top of the upper fixing ring 41 inside the material taking turntable 21 into the collecting frame for collection. After the cleaning is completed, control the ejecting hydraulic column 61 to retract downward until the lower injection mold 65 returns to its original position. At this time, control the lifting drive mechanism 23 to restart again to control the injection plate 25 to move downward, so that the upper injection mold 26 at its bottom is re-fitted with the lower injection mold 65 to carry out secondary injection production.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical injection molding machine, comprising a device main body, wherein an injection molding unit, a waste chip collection unit and a positioning unit are arranged on the device main body, and it is characterized in that: The injection unit includes an upper injection mold and a material taking turntable. The positioning unit includes an upper fixing ring and an inner injection ring. A plurality of storage grooves are formed on the inner wall surface of the upper fixing ring, and a cleaning mechanism is arranged in each storage groove. The cleaning mechanism includes a semi-circular rotating plate, which is rotationally matched with the inner wall of the storage groove and a torsion spring is arranged at the rotationally matching position. A burr scraper is arranged on the outer side of the semi-circular rotating plate. A top-out unit is arranged below the upper fixing ring, and the top-out unit includes a lower injection mold and a top-out hydraulic cylinder; During the mold closing process, when the upper injection mold descends, it contacts the top of the semi-circular rotating plate extending from the storage groove, causing the semi-circular rotating plate to be squeezed and turn into the interior of the storage groove; During the mold opening process, the semi-circular rotating plate rotates and resets under the action of the torsion spring, so that the inner wall of the upper fixing ring is covered with burr scrapers capable of covering the complete cross-sectional shape of the upper injection mold; when the lower injection mold ejects the injection molded part, the burr scrapers contact the outer surface of the injection molded part to scrape off burrs; an outer guiding ring is arranged at the bottom of the upper fixing ring, and the scraped burr waste can enter the waste collection unit through the outer guiding ring for collection; The lower injection mold is fixedly installed on the top of the top-out hydraulic cylinder, and a cleaning spring column is arranged on the outer side of the top-out hydraulic cylinder, and a residue scraper is arranged at one end of the cleaning spring column; The waste collection unit includes a mold plate arranged on the material taking turntable, and a guiding inclined plate is arranged at the bottom of the mold plate; The upper fixing ring, the outer guiding ring and the inner injection ring are fixedly connected inside the mold plate from top to bottom in sequence, and the inner diameter of the inner injection ring is smaller than the inner diameter of the upper fixing ring; The opening of the outer guiding ring is inclined, so that the scraped burr waste can fall to the opening of the outer guiding ring and slide down along the inclined opening to the guiding inclined plate.

2. The vertical injection molding machine according to claim 1, wherein: The equipment main body includes a top plate, the material taking turntable is arranged on the top of the top plate, a positioning column is arranged on the top of the material taking turntable, and a lifting driving mechanism and an injection molding component are arranged on the top of the positioning column.

3. The vertical injection molding machine according to claim 2, wherein: The output end of the lifting driving mechanism is fixedly connected with an injection molding plate, and an upper injection mold is arranged at the bottom of the injection molding plate.

4. The vertical injection molding machine according to claim 1, characterized in that: A rotating column is coaxially and fixedly connected to the surface of the semi-circular rotating plate, the rotating column is rotatably installed on the inner wall of the storage groove, torsion clamping plates are fixedly connected to the outer sides of both ends of the rotating column, the torsion springs are respectively sleeved on the outer sides of both ends of the rotating column, and both ends of the torsion spring are fixedly connected with the torsion clamping plate and the inner wall of the storage groove respectively.

5. A vertical injection molding machine according to claim 1, characterized in that: A guiding frame is arranged on one side of the guiding inclined plate, a collecting ring is arranged at one end of the guiding frame, and a collecting pipe is arranged at one end of the collecting ring.

6. The vertical injection molding machine according to claim 2, wherein: A base is arranged at the bottom of the top plate, a service chassis is arranged on one side of the base, a protective frame surrounding the top plate is arranged on the top of the base, and a control panel is arranged on the outer side of the protective frame.

7. An injection molding method for processing skateboard accessories, using a vertical injection molding machine according to any one of claims 1-6.

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