Distribution type multi-stage injection molding machine with adjustable ejection height

Abstract

The invention provides a distribution type multi-stage injection molding machine with adjustable ejection height, belongs to the technical field of plastic processing, and solves the technical problems that an existing injection molding machine cannot adjust the ejection height, cannot integrally mold injection molding parts with various colors and the like. The material distribution type multi-stage injection molding machine with the adjustable ejection height comprises a machine base, a vertical plate is fixed to the upper side of the machine base, a supporting beam is fixed to the upper end of the vertical plate, a storage box is fixed to the supporting beam, a first electric telescopic rod is fixed to the supporting beam, a lifting plate is fixed to the telescopic end of the first electric telescopic rod, and an upper mold is fixed to the lower side of the lifting plate; a cover plate is slidably connected to the upper die, a discharging mechanism is arranged between the cover plate and the storage box, a circular plate is fixed to the machine base, a magnetic plate and a non-magnetic plate are fixed to the left side and the right side of the circular plate respectively, and a switching motor is fixed to the circular plate. The multi-stage injection molding mechanism has the advantages that the ejection height is adjusted, multi-stage injection molding of plastic parts is achieved, and the quality of the injection molded parts is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic processing, and relates to an injection molding machine, in particular to a material-dividing multi-stage injection molding machine with adjustable ejection height. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill. Plastic parts such as lunch boxes and water cups are generally made by injection molding.

[0003] After searching, it is found that a Chinese patent document discloses an injection molding machine for plastic lunch boxes [Application number: 202211553106.5; Publication number: CN 115805692 A]. This injection molding machine includes a movable mold and a fixed mold. The movable mold is slidably equipped with four symmetrically arranged sliding columns. The movable mold is fixedly connected with a first rack plate by screws. The first rack plate is slidably assembled inside the fixed mold. The fixed mold is respectively fixedly connected with an injection port, a square rod, a vertical rod and a support rod by screws. Through the arrangement of the first rack plate, the driving gear and other structures, when the injection molding machine opens the mold, the movable mold slides to the left, and the first rack plate fixed on the movable mold moves to the left with it. The first rack plate drives the driving gear to rotate, and the driven gear rotates with it. The push plate moves to the left under the push of the two second rack plates, and the product formed in the ejection cavity is ejected. The structure is simple and not easy to be damaged, and the effect of increasing the service life is achieved.

[0004] Although the injection molding structure disclosed in the patent can eject the product formed in the cavity, has a simple structure, is not easy to damage, and achieves the effect of increasing the service life, the ejection height of the device is fixed and cannot be adjusted, which cannot meet different ejection requirements. In addition, when the appearance of existing lunch boxes, water cups and other injection molded parts requires multiple colors, they are generally completed by spraying, and lunch boxes and water cups of multiple colors cannot be directly formed by injection molding. After a period of use, they are easily discolored, affecting the appearance. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a material-dividing multi-stage injection molding machine with adjustable ejection height. The technical problems to be solved by the invention are: how to adjust the ejection height and how to realize multi-stage injection molding of plastic parts to improve the quality of injection molded parts.

[0006] The purpose of the present invention can be achieved by the following technical solutions: The invention relates to a material-separating multi-stage injection molding machine with adjustable ejection height, comprising a machine base, a vertical plate is fixed on the upper side of the machine base, a supporting beam is fixed on the upper end of the vertical plate, a storage box is fixed on the supporting beam, a first electric telescopic rod is fixed on the supporting beam, a lifting plate is fixed on the telescopic end of the first electric telescopic rod, an upper mold is fixed on the lower side of the lifting plate, a cover plate is slidably connected to the upper mold, a material unloading mechanism is arranged between the cover plate and the storage box, a circular plate is fixed on the machine base, a magnetic plate and a non-magnetic plate are respectively fixed on the left and right sides of the circular plate, a switching motor is fixed on the circular plate, a switching plate is fixed on the output shaft end of the switching motor, a lower mold is connected on both left and right ends of the switching plate, a mold cavity and an adjusting cavity are provided inside the lower mold, an ejection plate is slidably connected to the lower end of the mold cavity, a plurality of through holes are provided between the mold cavity and the adjusting cavity, an ejection column is fixed on the lower side of the ejection plate, the lower end of the ejection column extends into the adjusting cavity and is fixed with a metal plate, the inside of the mold cavity is connected with the adjusting plate through a lifting assembly, and an ejection spring is fixed between the adjusting plate and the ejection plate.

[0007] The working principle of the present invention is as follows: when working, the lower mold on the left is located directly above the upper mold, and the metal plate is lowered to the lowest position under the action of the magnetic plate, so that the ejector plate is located at the lower end of the mold cavity, and the first electric telescopic rod drives the lifting plate to descend, so that the upper mold is inserted into the lower mold, and the upper cover plate closes the lower mold, and the feeding mechanism injects the raw material in the storage box into the lower mold for injection molding. After the molding is completed, the cover plate and the lower mold are moved up, and then the switching motor drives the lower mold to rotate, so that the lower mold after injection molding and the unused lower mold exchange positions. At this time, the lower mold after injection molding is separated from the magnetic plate and enters the non-magnetic plate. Under the action of the ejector spring, the injection molded part is automatically ejected, with a high degree of automation and a simple structure. At the same time, the setting of the two lower molds can ensure the continuity of work, and the setting of the lifting assembly can adjust the height of the adjustment plate, thereby changing the elastic force of the ejector spring to achieve a change in the ejection height. At the same time, after a period of use, the elastic force of the ejector spring can be adjusted to prevent the elastic force of the ejector spring from attenuating and affecting the ejection height.

[0008] The lifting assembly includes a second threaded rod, and grooves are provided on the left and right sides of the adjustment cavity. The second threaded rod is rotatably connected in the groove, and the adjustment plate is rotatably connected to the second threaded rod. A first driving wheel is fixed on the second threaded rod, and the edge of the first driving wheel extends to the outside of the lower mold.

[0009] With the above structure, when the height of the adjustment plate needs to be adjusted, the first driving wheel is rotated to rotate the second screw, thereby moving the adjustment plate up and down, changing the elastic force of the ejection spring, and thus changing the ejection height.

[0010] A driving cavity is provided inside the lower mold, and a third threaded rod is rotatably connected inside the driving cavity. A connecting rod is threadedly connected to the third threaded rod, and an ejector rod is fixed to the other end of the connecting rod. The upper end of the ejector rod extends into the adjustment cavity and contacts the metal plate. A second driving wheel is fixed to the third threaded rod, and an edge of the second driving wheel extends to the outside of the lower mold.

[0011] With the above mechanism, when it is necessary to adjust the molding height of the injection molded part during operation, the third threaded rod can be driven to rotate by the second driving wheel, so that the ejector rod rises, and the ejector rod causes the metal plate to rise, thereby increasing the initial height of the ejector plate, thereby achieving the adjustment of the molding height of the injection molded part, and when adjusting the height of the ejector plate, the height of the adjustment plate will also be adjusted at the same time to ensure a suitable ejection height.

[0012] The lifting plate is threadedly connected with a first threaded rod, the lower end of the first threaded rod is rotatably connected to the cover plate, and the upper end of the first threaded rod is fixed with a third driving wheel.

[0013] With the above structure, during operation, the first screw can be rotated by the third driving wheel, so that the height of the cover plate can be changed, and the height at which the upper mold is inserted into the lower mold can be changed, thereby adapting to the injection molding of injection molded parts of different heights and the injection molding operations of injection molded parts with different bottom thicknesses, thereby improving the applicability of the device.

[0014] A feeding port is provided at the upper end of the discharge box, a rotating motor is fixed at the upper end of the storage box, a distribution box is fixed at the output shaft end of the rotating motor, the distribution box is located inside the storage box and is rotatably connected to the storage box, a plurality of distribution cavities are provided inside the distribution box, a discharge pipe is fixed at the lower end of each distribution box, and the discharge pipe is connected to the discharge mechanism.

[0015] By adopting the above structure, raw materials of different colors can be stored in each material distribution cavity during use, so that during injection molding, not only injection molded parts of different colors can be injected, but also the same injection molded part can be injected in stages, so that the colors of the upper, middle and lower positions of the injection molded parts are different. The height of each color, as well as the number of colors and the types of color combinations can be adjusted according to needs, which is highly practical.

[0016] The material discharge assembly includes a material receiving pipe, which is fixed at the lower end of the storage box, a feeding pump is fixed on the material receiving pipe, a first telescopic tube is fixed to the lower end of the material receiving pipe, the lower end of the first telescopic tube is connected to the cover plate, an insertion port is opened at the lower end of the material discharge pipe, a sealing assembly is arranged in the insertion port, the upper end of the material receiving pipe is slidably connected to the feeding pipe, a lifting rod is fixed to the outside of the feeding pipe, a fourth electric telescopic rod is fixed to the inside of the storage box, and the telescopic end of the fourth electric telescopic rod is fixedly connected to the lifting rod.

[0017] With the above structure, when working, the feeding tube is driven to rise by the fourth electric telescopic rod, so that the feeding tube is inserted into the insertion port, and then the blocking component in the insertion port is pushed open to realize the unloading operation. When it is necessary to switch to the next color, the fourth electric telescopic rod drives the feeding tube out of the insertion port, and the rotating motor drives the material distribution box to rotate, so that the unloading tube under the material distribution cavity of the corresponding color is aligned with the feeding tube, and then the feeding tube can be inserted.

[0018] The upper end of the cover plate is provided with a sliding opening corresponding to the upper mold, the inner part of the cover plate is rotatably connected with an outer gear ring, a driving motor is fixed in the side wall of the cover plate, a driving gear is fixed to the output shaft end of the driving motor, the driving gear is meshed with the outer gear ring, a second electric telescopic rod is fixed to the lower side of the outer gear ring, a grinding motor is fixed to the lower end of the second electric telescopic rod, a grinding wheel is fixed to the output shaft end of the grinding motor, and a drill bit is fixed to the lower center of the grinding wheel.

[0019] With the above structure, after each color of the injection molded part is injection molded, the end can be polished by a grinding wheel, and the next color injection molding operation can be carried out after the grinding is completed, so as to ensure that the connection of each color is smooth, thereby ensuring the quality and aesthetics of the product, and the drill bit arranged at the center of the lower side of the grinding wheel can be used to drill holes in the injection molded part, so that the materials of the two groups of colors are more firmly combined.

[0020] A dust box is fixed to the lower side of the outer gear ring, a third electric telescopic rod is fixed to the lower end of the dust box, a dust hood is fixed to the lower end of the third electric telescopic rod, a second telescopic tube is fixed to the upper side of the dust hood, a dust pipe is fixed to the upper end of the second telescopic tube, a fan is fixed to the lower end of the dust box, a filter is fixed inside the dust box, and the upper end of the dust pipe extends into the dust box and extends to a position near the top of the dust box.

[0021] By adopting the above structure, the debris generated by grinding and drilling can be adsorbed and cleaned to ensure the cleanliness of the upper end of the semi-finished injection molded part, thereby facilitating the next injection molding operation. The dust suction pipe extends to the upper part of the dust suction box to prevent the debris from falling back and ensure the dust suction effect.

[0022] The blocking assembly includes an elastic rod, a connecting rod is fixed to the fixed part of the elastic rod, the other end of the connecting rod is fixedly connected to the feeding pipe, a mounting plate is fixed to the telescopic part of the elastic rod, a blocking tube is fixed to the lower side of the mounting plate, the blocking tube is inserted into the insertion port, and a plurality of feed ports are opened on the outer periphery of the blocking plate.

[0023] With the above structure, initially, under the action of the elastic rod, the blocking tube is inserted into the insertion port, so that the feed port is not connected with the discharge pipe. When the feed pipe is inserted into the insertion port, the blocking tube is pushed upward, so that the feed port is connected with the discharge pipe, realizing the discharge operation.

[0024] Compared with the existing technology, this material-dividing multi-stage injection molding machine with adjustable ejection height has the following advantages: 1. During operation, the lower mold on the left is located directly above the upper mold. Under the action of the magnetic plate, the metal plate drops to the bottom, so that the ejector plate is located at the lower end of the mold cavity. The first electric telescopic rod drives the lifting plate to drop, so that the upper mold is inserted into the lower mold. The upper cover plate closes the lower mold, and the feeding mechanism injects the raw material in the storage box into the lower mold for injection molding. After the molding is completed, the cover plate and the lower mold move up, and then the motor is switched to drive the lower mold to rotate, so that the lower mold after injection and the unused lower mold exchange positions. At this time, the lower mold after injection is separated from the magnetic plate and enters the non-magnetic plate. Under the action of the ejector spring, the injection molded part is automatically ejected, with a high degree of automation and a simple structure. At the same time, the setting of the two lower molds can ensure the continuity of work, and the setting of the lifting assembly can adjust the height of the adjustment plate, thereby changing the elastic force of the ejector spring to achieve a change in the ejection height. At the same time, after a period of use, the elastic force of the ejector spring can be adjusted to prevent the elastic force of the ejector spring from attenuating and affecting the ejection height.

[0025] 2. During operation, when it is necessary to adjust the molding height of the injection molded part, the third threaded rod can be driven to rotate by the second driving wheel, so that the ejector rod rises, and the ejector rod causes the metal plate to rise, thereby increasing the initial height of the ejector plate, thereby adjusting the molding height of the injection molded part. When adjusting the height of the ejector plate, the height of the adjustment plate will also be adjusted at the same time to ensure a suitable ejection height.

[0026] 3. When in use, raw materials of different colors can be stored in each material distribution cavity, so that during injection molding, not only injection molded parts of different colors can be injected, but also the same injection molded part can be injected in stages, so that the colors of the upper, middle and lower positions of the injection molded parts are different. The height of each color, the number of colors and the types of color combinations can be adjusted according to needs, which is highly practical.

[0027] 4. The fourth electric telescopic rod drives the feeding tube to rise, so that the feeding tube is inserted into the insertion port, and then the blocking component in the insertion port is pushed open to realize the unloading operation. When it is necessary to switch to the next color, the fourth electric telescopic rod drives the feeding tube to disengage from the insertion port, and the rotating motor drives the material distribution box to rotate, so that the unloading tube under the material distribution cavity of the corresponding color is aligned with the feeding tube, and then the feeding tube can be inserted.

[0028] 5. After each color of the injection molded part is injected, the end can be polished by a grinding wheel. After the polishing is completed, the injection molding of the next color can be carried out, so as to ensure that the connection of each color is smooth, thereby ensuring the quality and aesthetics of the product. The drill bit set in the center of the lower side of the grinding wheel can be used to drill holes in the injection molded part, so that the two sets of color materials can be more firmly combined.

[0029] 6. Initially, under the action of the elastic rod, the blocking tube is inserted into the insertion port, so that the feed port is not connected with the discharge pipe. When the feed pipe is inserted into the insertion port, the blocking tube is pushed upward, so that the feed port is connected with the discharge pipe to realize the discharge operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention.

[0031] Figure 2 It is a structural schematic diagram of the lower mold in the present invention.

[0032] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0033] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.

[0034] Figure 5 It is a schematic diagram of the structure of the magnetic plate in the present invention.

[0035] Figure 6 It is a structural schematic diagram of the cover plate in the present invention.

[0036] Figure 7 It is a structural schematic diagram of the storage box in the present invention.

[0037] Figure 8 It is a structural schematic diagram of the feeding pipe in the present invention.

[0038] Fig. 9 It is a structural schematic diagram of the material distribution box in the present invention.

[0039] In the figure, 1, machine base; 2, vertical plate; 3, support beam; 4, first electric telescopic rod; 5, lifting plate; 6, storage box; 7, material receiving pipe; 8, upper mold; 9, cover plate; 10, first threaded rod; 11, lower mold; 12, round plate; 13, magnetic plate; 14, non-magnetic plate; 15, switching motor; 16, switching plate; 17, mold cavity; 18, ejector plate; 19, adjustment cavity; 20, through hole; 21, adjustment plate; 22, ejector spring; 23, ejector column; 24, metal plate; 25, second threaded rod; 26, first driving wheel; 27, third threaded rod; 28, second driving wheel; 29, ejector Rod; 30, sliding mouth; 31, outer gear ring; 32, driving motor; 33, driving gear; 34, second electric telescopic rod; 35, grinding wheel; 36, dust box; 37, fan; 38, filter; 39, dust pipe; 40, second telescopic tube; 41, dust hood; 42, third electric telescopic rod; 43, feeding port; 44, rotating motor; 45, distribution box; 46, drill bit; 47, feeding pipe; 48, fourth electric telescopic rod; 49, lifting rod; 50, feeding pipe; 51, insertion port; 52, elastic rod; 53, connecting rod; 54, mounting plate; 55, blocking pipe; 56, feeding port. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] like Figure 1-Figure 9 As shown, the present split-material multi-stage injection molding machine with adjustable ejection height comprises a machine base 1, a vertical plate 2 is fixed on the upper side of the machine base 1, a support beam 3 is fixed on the upper end of the vertical plate 2, a storage box 6 is fixed on the support beam 3, a first electric telescopic rod 4 is fixed on the support beam 3, a lifting plate 5 is fixed on the telescopic end of the first electric telescopic rod 4, an upper mold 8 is fixed on the lower side of the lifting plate 5, a cover plate 9 is slidably connected to the upper mold 8, a material unloading mechanism is arranged between the cover plate 9 and the storage box 6, a circular plate 12 is fixed on the machine base 1, a magnetic plate 13 and a non-magnetic plate 14 are respectively fixed on the left and right sides of the circular plate 12, and a magnetic plate 13 and a non-magnetic plate 14 are fixed on the circular plate 12. There is a switching motor 15, and a switching plate 16 is fixed to the output shaft end of the switching motor 15. The left and right ends of the switching plate 16 are connected to the lower mold 11. The interior of the lower mold 11 is provided with a mold cavity 17 and an adjusting cavity 19. The lower end of the mold cavity 17 is slidably connected to an ejector plate 18. A plurality of through holes 20 are provided between the mold cavity 17 and the adjusting cavity 19. An ejector column 23 is fixed to the lower side of the ejector plate 18. The lower end of the ejector column 23 extends into the adjusting cavity 19 and is fixed with a metal plate 24. The interior of the mold cavity 17 is connected to an adjusting plate 21 through a lifting assembly, and an ejector spring 22 is fixed between the adjusting plate 21 and the ejector plate 18.

[0042] During operation, the lower mold 11 on the left is located directly above the upper mold 8. The metal plate 24 is lowered to the bottom under the action of the magnetic plate 13, so that the ejector plate 18 is located at the lower end of the mold cavity 17. The first electric telescopic rod 4 drives the lifting plate 5 to descend, so that the upper mold 8 is inserted into the lower mold 11. The upper cover plate 9 closes the lower mold 11, and the feeding mechanism injects the raw material in the storage box 6 into the lower mold 11 for injection molding. After the molding is completed, the cover plate 9 and the lower mold 11 move up, and then the motor 15 is switched to drive the lower mold 11 to rotate, so that the lower mold 11 after injection molding is aligned with the unused lower mold. The molds 11 are exchanged in position. At this time, the lower mold 11 after injection molding is separated from the magnetic plate 13 and enters onto the non-magnetic plate 14. Under the action of the ejection spring 22, the injection molded part is automatically ejected. The automation level is high and the structure is simple. At the same time, the setting of the two lower molds 11 can ensure the continuity of the work, and the setting of the lifting assembly can adjust the height of the adjustment plate 21, thereby changing the elastic force of the ejection spring 22 and realizing the change of the ejection height. At the same time, after using it for a period of time, the elastic force of the ejection spring 22 can be adjusted to prevent the elastic force of the ejection spring 22 from attenuating and affecting the ejection height.

[0043] The lifting assembly includes a second threaded rod 25, and grooves are provided on the left and right sides of the adjustment cavity 19. The second threaded rod 25 is rotatably connected in the groove, and the adjustment plate 21 is rotatably connected to the second threaded rod 25. A first driving wheel 26 is fixed on the second threaded rod 25, and the edge of the first driving wheel 26 extends to the outside of the lower mold 11.

[0044] With the above structure, when the height of the adjustment plate 21 needs to be adjusted, the first driving wheel 26 is rotated to rotate the second screw, so that the adjustment plate 21 moves up and down, thereby changing the elastic force of the ejection spring 22 and changing the ejection height.

[0045] A driving cavity is provided inside the lower mold 11, and a third threaded rod 27 is rotatably connected inside the driving cavity. A connecting rod 53 is threadedly connected to the third threaded rod 27, and an ejector rod 29 is fixed to the other end of the connecting rod 53. The upper end of the ejector rod 29 extends into the adjustment cavity 19 and contacts the metal plate 24. A second driving wheel 28 is fixed to the third threaded rod 27, and the edge of the second driving wheel 28 extends to the outside of the lower mold 11.

[0046] With the above mechanism, when it is necessary to adjust the molding height of the injection molded part during operation, the third threaded rod 27 can be driven to rotate by the second driving wheel 28, so that the ejector rod 29 rises, and the ejector rod 29 causes the metal plate 24 to rise, thereby raising the initial height of the ejector plate 18, thereby achieving the adjustment of the molding height of the injection molded part, and when adjusting the height of the ejector plate 18, the height of the adjustment plate 21 will also be adjusted at the same time to ensure a suitable ejection height.

[0047] The lifting plate 5 is threadedly connected with a first threaded rod 10 , the lower end of the first threaded rod 10 is rotatably connected to the cover plate 9 , and the upper end of the first threaded rod 10 is fixed with a third driving wheel.

[0048] With the above structure, during operation, the first screw can be rotated by the third driving wheel, so that the height of the cover plate 9 is changed, and the height at which the upper mold 8 is inserted into the lower mold 11 is changed, thereby adapting to the injection molding of injection molded parts of different heights and the injection molding operations of injection molded parts with different bottom thicknesses, thereby improving the applicability of the device.

[0049] A feeding port 43 is provided at the upper end of the discharge box, a rotating motor 44 is fixed to the upper end of the storage box 6, a distribution box 45 is fixed to the output shaft end of the rotating motor 44, the distribution box 45 is located inside the storage box 6 and is rotatably connected to the storage box 6, a plurality of distribution cavities are provided inside the distribution box 45, a discharge pipe 47 is fixed to the lower end of each distribution box 45, and the discharge pipe 47 is connected to the discharge mechanism.

[0050] By adopting the above structure, raw materials of different colors can be stored in each material distribution cavity during use, so that during injection molding, not only injection molded parts of different colors can be injected, but also the same injection molded part can be injected in stages, so that the colors of the upper, middle and lower positions of the injection molded parts are different. The height of each color, as well as the number of colors and the types of color combinations can be adjusted according to needs, which is highly practical.

[0051] The material discharge assembly includes a material receiving pipe 7, which is fixed at the lower end of the storage box 6, and a feeding pump is fixed on the material receiving pipe 7. A first telescopic pipe is fixed to the lower end of the material receiving pipe 7, and the lower end of the first telescopic pipe is connected to the cover plate 9. An insertion port 51 is provided at the lower end of the material discharge pipe 47, and a sealing assembly is arranged in the insertion port 51. The upper end of the material receiving pipe 7 is slidably connected to the material feeding pipe 50, and a lifting rod 49 is fixed to the outer side of the material feeding pipe 50. A fourth electric telescopic rod 48 is fixed to the inside of the storage box 6, and the telescopic end of the fourth electric telescopic rod 48 is fixedly connected to the lifting rod 49.

[0052] With the above structure, when working, the feeding tube 50 is driven to rise by the fourth electric telescopic rod 48, so that the feeding tube 50 is inserted into the insertion port 51, and then the blocking component in the insertion port 51 is pushed open to realize the unloading operation. When it is necessary to switch to the next color, the fourth electric telescopic rod 48 drives the feeding tube 50 to disengage from the insertion port 51, and the rotating motor 44 drives the distribution box 45 to rotate, so that the unloading tube 47 under the distribution cavity of the corresponding color is aligned with the feeding tube 50, and then the feeding tube 50 is inserted.

[0053] The upper end of the cover plate 9 is provided with a sliding opening 30 corresponding to the upper mold 8, and the inner part of the cover plate 9 is rotatably connected with an outer gear ring 31, a driving motor 32 is fixed inside the side wall of the cover plate 9, a driving gear 33 is fixed to the output shaft end of the driving motor 32, the driving gear 33 is meshed with the outer gear ring 31, a second electric telescopic rod 34 is fixed to the lower side of the outer gear ring 31, a grinding motor is fixed to the lower end of the second electric telescopic rod 34, a grinding wheel 35 is fixed to the output shaft end of the grinding motor, and a drill bit 46 is fixed to the lower center of the grinding wheel 35.

[0054] With the above structure, after each color of the injection molded part is injection molded, the end can be polished by the grinding wheel 35, and the next color injection molding operation can be carried out after the grinding is completed, so as to ensure that the connection of each color is smooth, thereby ensuring the quality and aesthetics of the product, and the drill bit 46 arranged at the center of the lower side of the grinding wheel 35 can be used to drill holes in the injection molded part, so that the materials of the two groups of colors are more firmly combined.

[0055] A dust box 36 is fixed to the lower side of the outer gear ring 31, a third electric telescopic rod 42 is fixed to the lower end of the dust box 36, a dust hood 41 is fixed to the lower end of the third electric telescopic rod 42, a second telescopic tube 40 is fixed to the upper side of the dust hood 41, a dust pipe 39 is fixed to the upper end of the second telescopic tube 40, a fan 37 is fixed to the lower end of the dust box 36, a filter 38 is fixed inside the dust box 36, and the upper end of the dust pipe 39 extends into the dust box 36 and extends to a position near the top of the dust box 36.

[0056] By adopting the above structure, the debris generated by grinding and drilling can be adsorbed and cleaned to ensure the cleanliness of the upper end of the semi-finished injection molded part, thereby facilitating the next injection molding operation. The dust suction pipe 39 extends to the upper part of the dust suction box 36 to prevent the debris from falling back and ensure the dust suction effect.

[0057] The blocking assembly includes an elastic rod 52, a connecting rod 53 is fixed to the fixed part of the elastic rod 52, the other end of the connecting rod 53 is fixedly connected to the feed pipe 47, a mounting plate 54 is fixed to the telescopic part of the elastic rod 52, a blocking tube 55 is fixed to the lower side of the mounting plate 54, the blocking tube 55 is inserted into the insertion port 51, and a plurality of feed ports 56 are opened on the outer periphery of the blocking plate.

[0058] With the above structure, initially, under the action of the elastic rod 52, the blocking tube 55 is inserted into the insertion port 51, so that the feed port 56 is not connected with the discharge pipe 47; when the feed pipe 50 is inserted into the insertion port 51, the blocking tube 55 is pushed upward, so that the feed port 56 is connected with the discharge pipe 47, thereby realizing the discharge operation.

[0059] The working principle of the present invention is as follows: during operation, the lower mold 11 on the left is located directly above the upper mold 8, and the metal plate 24 is lowered to the bottom under the action of the magnetic plate 13, so that the ejector plate 18 is located at the lower end of the mold cavity 17, and the first electric telescopic rod 4 drives the lifting plate 5 to descend, so that the upper mold 8 is inserted into the lower mold 11, and the upper cover plate 9 closes the lower mold 11, and the feeding tube 50 is driven to rise by the fourth electric telescopic rod 48, so that the feeding tube 50 is inserted into the insertion port 51, and then the blocking component in the insertion port 51 is pushed open. The material unloading operation can be realized. When it is necessary to switch to the next color, the fourth electric telescopic rod 48 drives the feeding tube 50 to disengage from the insertion port 51, and the rotating motor 44 drives the material distribution box 45 to rotate, so that the unloading tube 47 under the material distribution cavity of the corresponding color is aligned with the feeding tube 50, and then the feeding tube 50 is inserted, so that the raw material in the material distribution box 45 can be injected into the lower mold 11 as needed. When plastic parts of multiple colors are injected, after each color of the injection molded part is injected, the end can be polished by the grinding wheel 35, and then the grinding is completed. The next color injection molding operation is performed, so that the connection of each color can be guaranteed to be flat, thereby ensuring the quality and aesthetics of the product, and the drill bit 46 arranged at the center of the lower side of the grinding wheel 35 can drill holes in the injection molded part, so that the materials of the two groups of colors are more firmly combined. After the overall molding of the plastic part is completed, the cover plate 9 and the lower mold 11 are moved up, and then the switching motor 15 drives the lower mold 11 to rotate, so that the lower mold 11 after injection molding is exchanged with the unused lower mold 11. At this time, the lower mold after injection molding 11 takes off the magnetic plate 13 and enters the non-magnetic plate 14. Under the action of the ejector spring 22, the injection molded part is automatically ejected. It has a high degree of automation and a simple structure. At the same time, the setting of the two lower molds 11 can ensure the continuity of the work, and the setting of the lifting component can adjust the height of the adjustment plate 21, thereby changing the elastic force of the ejector spring 22 and realizing the change of the ejection height. At the same time, after using it for a period of time, the elastic force of the ejector spring 22 can be adjusted to prevent the elastic force of the ejector spring 22 from attenuating and affecting the ejection height.

[0060] In summary, by setting up the lifting assembly, the adjustment plate 21, the metal plate 24, the magnetic plate 13 and other structures, the ejection height can be adjusted, and the multi-stage injection molding of plastic parts can be achieved to improve the quality of the injection molded parts.

[0061] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A split-type multi-stage injection molding machine with adjustable ejection height, comprising a machine base (1), characterized in that: A vertical plate (2) is fixed on the upper side of the machine base (1), a support beam (3) is fixed on the upper end of the vertical plate (2), a storage box (6) is fixed on the support beam (3), a first electric telescopic rod (4) is fixed on the support beam (3), a lifting plate (5) is fixed on the telescopic end of the first electric telescopic rod (4), an upper mold (8) is fixed on the lower side of the lifting plate (5), a cover plate (9) is slidably connected to the upper mold (8), a material discharge mechanism is provided between the cover plate (9) and the storage box (6), a circular plate (12) is fixed on the machine base (1), a magnetic plate (13) and a non-magnetic plate (14) are respectively fixed on the left and right sides of the circular plate (12), a switching motor (15) is fixed on the circular plate (12), and the switching motor ( A switching plate (16) is fixed to the output shaft end of the mold (15), and the left and right ends of the switching plate (16) are connected to the lower mold (11). The lower mold (11) is provided with a mold cavity (17) and an adjustment cavity (19). The lower end of the mold cavity (17) is slidably connected to an ejector plate (18). A plurality of through holes (20) are provided between the mold cavity (17) and the adjustment cavity (19). An ejector column (23) is fixed to the lower side of the ejector plate (18). The lower end of the ejector column (23) extends into the adjustment cavity (19) and is fixed with a metal plate (24). The inside of the mold cavity (17) is connected to an adjustment plate (21) via a lifting assembly. An ejector spring (22) is fixed between the adjustment plate (21) and the ejector plate (18).

2. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 1, characterized in that: The lifting assembly comprises a second threaded rod (25), and grooves are provided on both left and right sides of the adjustment cavity (19). The second threaded rod (25) is rotatably connected in the grooves, and the adjustment plate (21) is rotatably connected to the second threaded rod (25). A first driving wheel (26) is fixed to the second threaded rod (25), and an edge of the first driving wheel (26) extends to the outside of the lower mold (11).

3. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 1, characterized in that: The lower mold (11) has a driving cavity formed inside, a third threaded rod (27) is rotatably connected inside the driving cavity, a connecting rod (53) is threadedly connected to the third threaded rod (27), an ejector rod (29) is fixed to the other end of the connecting rod (53), the upper end of the ejector rod (29) extends into the adjustment cavity (19) and contacts the metal plate (24), a second driving wheel (28) is fixed to the third threaded rod (27), and an edge of the second driving wheel (28) extends to the outside of the lower mold (11).

4. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 1, characterized in that: A first threaded rod (10) is threadedly connected to the lifting plate (5); the lower end of the first threaded rod (10) is rotatably connected to the cover plate (9); and a third driving wheel is fixed to the upper end of the first threaded rod (10).

5. The material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 1, characterized in that: A feeding port (43) is provided at the upper end of the discharge box, a rotating motor (44) is fixed at the upper end of the storage box (6), a material distribution box (45) is fixed at the output shaft end of the rotating motor (44), the material distribution box (45) is located inside the storage box (6) and is rotatably connected to the storage box (6), a plurality of material distribution cavities are provided inside the material distribution box (45), a material discharge pipe (47) is fixed at the lower end of each material distribution box (45), and the material discharge pipe (47) is connected to the material discharge mechanism.

6. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 5, characterized in that: The material discharge assembly comprises a material receiving pipe (7), the material receiving pipe (7) is fixed at the lower end of the storage box (6), a feeding pump is fixed on the material receiving pipe (7), a first telescopic pipe is fixed at the lower end of the material receiving pipe (7), the lower end of the first telescopic pipe is connected to the cover plate (9), an insertion port (51) is opened at the lower end of the material discharge pipe (47), a blocking assembly is arranged in the insertion port (51), the upper end of the material receiving pipe (7) is slidably connected to the material feeding pipe (50), a lifting rod (49) is fixed on the outer side of the material feeding pipe (50), a fourth electric telescopic rod (48) is fixed inside the storage box (6), and the telescopic end of the fourth electric telescopic rod (48) is fixedly connected to the lifting rod (49).

7. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 1, characterized in that: The upper end of the cover plate (9) is provided with a sliding opening (30) corresponding to the upper mold (8); the inner part of the cover plate (9) is rotatably connected to an outer gear ring (31); a driving motor (32) is fixed inside the side wall of the cover plate (9); a driving gear (33) is fixed to the output shaft end of the driving motor (32); the driving gear (33) is meshed with the outer gear ring (31); a second electric telescopic rod (34) is fixed to the lower side of the outer gear ring (31); a grinding motor is fixed to the lower end of the second electric telescopic rod (34); a grinding wheel (35) is fixed to the output shaft end of the grinding motor; and a drill bit (46) is fixed to the lower center of the grinding wheel (35).

8. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 7, characterized in that: A dust box (36) is fixed to the lower side of the outer gear ring (31); a third electric telescopic rod (42) is fixed to the lower end of the dust box (36); a dust hood (41) is fixed to the lower end of the third electric telescopic rod (42); a second telescopic tube (40) is fixed to the upper side of the dust hood (41); a dust pipe (39) is fixed to the upper end of the second telescopic tube (40); a fan (37) is fixed to the lower end of the dust box (36); a filter screen (38) is fixed inside the dust box (36); and an upper end of the dust pipe (39) extends into the dust box (36) and to a position near the top of the dust box (36).

9. A material-dividing multi-stage injection molding machine with adjustable ejection height according to claim 6, characterized in that: The blocking assembly comprises an elastic rod (52), a connecting rod (53) being fixed to a fixed portion of the elastic rod (52), the other end of the connecting rod (53) being fixedly connected to a feed tube (47), a mounting plate (54) being fixed to a telescopic portion of the elastic rod (52), a blocking tube (55) being fixed to the lower side of the mounting plate (54), the blocking tube (55) being inserted into the insertion port (51), and a plurality of feed ports (56) being provided on the outer periphery of the blocking plate.

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