Injection molding mold for processing plastic meal box

Abstract

The invention discloses an injection molding mold for plastic meal box processing, and relates to the technical field of injection molding molds for plastic meal box processing, the injection molding mold for plastic meal box processing comprises a base, a support is fixed on the upper surface of the base, and a lower mold is fixed on the upper surface of the base. According to the injection molding mold for plastic lunch box processing, after injection molding of a plastic lunch box is completed, the upper mold is lifted, the control plate is manually pushed to drive the annular blade to cut flaws such as protrusions and burrs generated during injection molding of the plastic lunch box on the outer surface of the plastic lunch box, and meanwhile the control plate is matched to fix the plastic lunch box; therefore, the plastic lunch box is prevented from being automatically demolded and falling due to pushing of the annular blade, the problems that the appearance of the plastic lunch box possibly has flaws such as burrs after injection molding, and a user is easily scratched during use are solved, and meanwhile, the plastic lunch box is prevented from falling due to the fact that the annular blade is not sharp.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding molds for plastic lunch box processing, and specifically relates to an injection molding mold for plastic lunch box processing. Background Technique

[0002] Injection molding is an efficient and precise plastic molding method that can produce plastic products with high dimensional accuracy, good surface quality, and complex shapes. For the production of plastic lunch boxes, injection molding molds can achieve rapid molding, improve production efficiency, reduce production costs, and ensure the quality and consistency of lunch boxes.

[0003] An injection molding mold for plastic lunch box processing with the patent publication number CN217476505U includes a bottom plate. The output end of the electric telescopic rod passes through the support plate and is fixedly connected to the upper mold. The upper surface of the bottom plate is respectively provided with a lower mold and a U-shaped plate. A motor is fixedly installed on the front surface of the U-shaped plate. The output shaft of the motor passes through the U-shaped plate and is fixedly connected to a rotating shaft. A plurality of cams are sleeved on the outer side of the rotating shaft. A plurality of tension springs are evenly and fixedly installed on one side of the U-shaped plate. One end of each tension spring is fixedly connected to a rubber block. One side of the rubber block is fixedly installed with a movable part passing through the U-shaped plate. In the above application, the rubber block and the U-shaped plate are movably connected by a movable part and a tension spring. At the same time, by starting the motor, the rotating shaft connected to its output shaft rotates, so that the outer cams continuously push the movable part back and forth, so that the rubber block continuously impacts the lower mold, promoting the discharge of internal air bubbles and improving the quality of the produced plastic lunch boxes.

[0004] However, the above injection molding mold for plastic lunch box processing only makes improvements to the molding process of plastic lunch boxes. In the existing technology, the outer surface of plastic products after injection molding mostly contains burrs, especially there will be protrusions and other defects at the injection holes. If these defects are relatively sharp, they are likely to cause harm to users during use. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an injection molding mold for plastic lunch box processing, which solves the problems put forward in the above background technique.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An injection molding die for plastic lunch box processing, including a base, a bracket is fixed on the upper surface of the base, a lower die is fixed on the upper surface of the base, an electric telescopic rod penetrates through the upper surface of the bracket and is slidably connected at the penetration point, the bottom surface of the electric telescopic rod is fixed with an upper die, an injection hole is opened on the upper surface of the upper die, a collection box penetrates through the base and is slidably connected at the penetration point, a trimming device for facilitating the cleaning of burrs on the surface of the plastic lunch box is arranged on the upper surface of the base, a grinding device for further smoothing the surface of the plastic lunch box is arranged on the side of the trimming device, and a collection device for facilitating the collection of burrs and other scraps is arranged above the base; Among them, the trimming device includes a guide rod, a control plate, a circular blade, a chute, a first spring, a circular sleeve, a convex block and a knocking rod. The guide rod is fixedly connected to the side wall of the base. The guide rod penetrates through the control plate and is slidably connected at the penetration point. The bottom surface of the control plate is in contact with the upper surface of the base, and the control plate slides along the guide rod when moving.

[0007] According to the above technical solution, the side wall of the control plate is in contact with the side wall of the lower die. The circular blade is fixedly connected to the side wall of the control plate. The chute is opened on the outer wall of the guide rod. A first limit block is fixed at one end of the guide rod away from the base. The first spring is fixedly connected to the side of the first limit block close to the guide rod. The control plate drives the circular blade to move to cut the burrs.

[0008] According to the above technical solution, the guide rod penetrates through the circular sleeve and is in contact at the penetration point. The convex block is fixedly connected to the inner wall of the circular sleeve. The outer wall of the convex block is in contact with the inner wall of the chute. The knocking rod is hinged to the outer wall of the circular sleeve. One end of the first spring away from the first limit block is in contact with the side wall of the circular sleeve. When the circular sleeve moves, it rotates and drives the knocking rod to knock on the control plate.

[0009] According to the above technical solution, the grinding device includes a grinding rod, a gear, a rack, a slider, a second spring, a pressing rod and a pressing block. A second limit block is fixed on the side wall of the control plate. The grinding rod penetrates through the second limit block and is rotatably connected at the penetration point. When the control plate slides, it drives the grinding rod to move.

[0010] According to the above technical solution, the gear is fixedly connected to the left end of the grinding rod. The rack is fixedly connected to the left side wall of the lower die. The rack and the gear are meshed. The grinding rod penetrates through the slider and is slidably connected at the penetration point. The second spring is fixedly connected to the side wall of the slider. When the grinding rod moves, it also rotates.

[0011] According to the above technical solution, one end of the second spring away from the slider is fixedly connected to the side wall of the second limiting block, the extrusion rod is fixedly connected to the outer wall of the slider, the extrusion block is fixedly connected to the right side wall of the lower mold, and the slider rubs the grinding rod during the movement.

[0012] According to the above technical solution, the collection device includes an elastic airbag, a spray pipe, a baffle, an inclined plane block, a push rod, a hinge block, a third spring, a hinge rod and a pressing plate. A third limiting block is fixed to the side wall of the control board, the elastic airbag is fixedly connected to the side wall of the third limiting block, the spray pipe is fixed to the outer wall of the elastic airbag, and the slider repeatedly squeezes the elastic airbag when sliding.

[0013] According to the above technical solution, the spray pipe is communicated with the elastic airbag. A fixing rod is fixed to the side wall of the control board. The fixing rod penetrates through the baffle and is rotatably connected at the penetrating position. The inclined plane block is fixedly connected to the side of the bracket. The push rod is fixedly connected to the bottom surface of the control board. The push rod penetrates through the upper surface of the base and is slidably connected at the penetrating position. The side wall of the hinge block is slidably connected to the inner wall of the collection box. When the control board moves above the collection box, it drives the hinge block to slide.

[0014] According to the above technical solution, the third spring is fixedly connected to the side wall of the hinge block. One end of the third spring away from the hinge block is fixedly connected to the inner wall of the collection box. The hinge rod is hinged to the side wall of the hinge block. The pressing plate is slidably connected to the inner wall of the collection box. One end of the hinge rod away from the hinge block is hinged to the side wall of the pressing plate. When the hinge block slides, it pushes the pressing plate to slide through the hinge rod.

[0015] The present invention provides an injection molding die for plastic lunch box processing. It has the following beneficial effects: 1. The present invention is provided with a trimming device. After the plastic lunch box is injection molded, the upper mold is lifted. By manually pushing the control board, the circular blade cuts the protrusions, burrs and other defects generated during the injection molding of the plastic lunch box on the outer surface of the plastic lunch box. At the same time, the control board is used to fix the plastic lunch box, so as to prevent the plastic lunch box from automatically demolding and falling due to the pushing of the circular blade. This solves the problem that the outer surface of the plastic lunch box may still have burrs and other defects after injection molding, which are likely to scratch the user during use. At the same time, it prevents the plastic lunch box from falling due to the bluntness of the circular blade; after cutting the defects, the cut scraps are pushed into the collection box. At the same time, the chute, the annular sleeve and the convex block are used to drive the knocking rod to rotate, knock the control board, so that the control board shakes above the collection box, drives the circular blade to shake, and thus better collects the scraps into the collection box, which is convenient for recycling. This solves the problem that the trimmed scraps are directly scattered in the air, affecting the environment and causing waste at the same time.

[0016] 2. The present invention is provided with a grinding device. After trimming the plastic lunch box, the grinding rod is driven to rotate on the outer surface of the plastic lunch box through the cooperation of gears and racks, and the protrusions that may remain after cutting by the annular blade are ground flat, so that the outer surface of the plastic lunch box is smoother, solving the problem that protrusions may remain when the annular blade cuts burrs and protrusions, and further improving the trimming effect of the plastic lunch box; while grinding the plastic lunch box, the slider with silk pasted on the inner wall is driven to slide repeatedly on the outer wall of the glass grinding rod through the cooperation of the second spring, the extrusion rod and the extrusion block for friction, making the grinding rod negatively charged, so as to adsorb the dust generated during grinding, solving the problem that plastic dust is light and forms flying dust after flying, which affects the environment, and at the same time further improving the collection efficiency of the scraps.

[0017] 3. The present invention is provided with a collection device. While trimming the plastic lunch box, the elastic airbag is squeezed by the slider to blow air to the side of the lower mold, blowing the scraps cut from the side to above the baffle, and falling down in cooperation with the inclined plane block when moving above the collection box, so as to collect the scraps on the side, solving the problem that the scraps on the side are easily directly dropped into the air, and at the same time avoiding the accumulation of scraps on the components of the grinding device, causing blockage and jamming the control board; after all the scraps enter the collection box, the pressing plates are driven to approach each other through the cooperation of the push rod, the hinge block, the third spring and the hinge rod, compressing the scraps in the collection box, so that the scraps are stacked more tightly, thus avoiding the scraps being driven to fly by the vibration generated during the movement of the equipment in the collection box, solving the problem that the scraps are also easily formed into flying dust after collection, which pollutes the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the right side structure of the present invention; Figure 3 It is a schematic diagram of the structure of the lower mold of the present invention; Figure 4 It is a schematic diagram of the structure of the guide rod of the present invention; Figure 5 It is a schematic diagram of the structure of the left grinding device of the present invention; Figure 6 It is an enlarged schematic diagram of the left grinding device of the present invention; Figure 7 It is a schematic diagram of the structure of the right grinding device of the present invention; Figure 8 It is a schematic diagram of the structure of the collection device of the present invention; Figure 9 It is a schematic diagram of the structure of the collection box of the present invention.

[0019] In the figure: 1, base; 2, bracket; 3, lower mold; 4, upper mold; 5, collection box; 61, guide rod; 62, control board; 63, annular blade; 64, chute; 65, first spring; 66, annular sleeve; 67, bump; 68, knocking rod; 71, grinding rod; 72, gear; 73, rack; 74, slider; 75, second spring; 76, extrusion rod; 77, extrusion block; 81, elastic airbag; 82, nozzle; 83, baffle; 84, inclined plane block; 85, push rod; 86, hinge block; 87, third spring; 88, hinge rod; 89, pressing plate. Specific implementation mode

[0020] 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 of 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.

[0021] Please refer to Figures 1-9 , an embodiment of the present invention is: an injection molding mold for plastic lunch box processing, including a base 1, a bracket 2 is fixed on the upper surface of the base 1, a lower mold 3 is fixed on the upper surface of the base 1, an electric telescopic rod passes through the upper surface of the bracket 2 and is slidably connected at the passing position, the bottom surface of the electric telescopic rod is fixed with an upper mold 4, an injection hole is opened on the upper surface of the upper mold 4, after the plastic lunch box is formed, the electric telescopic rod is started to retract, and the electric telescopic rod drives the upper mold 4 to lift upward to demold the plastic lunch box. A collection box 5 passes through the base 1 and is slidably connected at the passing position. A trimming device for conveniently cleaning the burrs on the surface of the plastic lunch box is arranged on the upper surface of the base 1.

[0022] Among them, the trimming device includes a guide rod 61, a control board 62, an annular blade 63, a chute 64, a first spring 65, an annular sleeve 66, a bump 67 and a striking rod 68. The guide rod 61 is fixedly connected to the side wall of the base 1. The guide rod 61 penetrates through the control board 62, and the penetration part is in sliding connection. The bottom surface of the control board 62 is in contact with the upper surface of the base 1. After the upper mold 4 is fully raised, the control board 62 is manually toggled, and the control board 62 slides along the guide rod 61. The side wall of the control board 62 is in contact with the side wall of the lower mold 3. The annular blade 63 is fixedly connected to the side wall of the control board 62. When the control board 62 slides, it drives the annular blade 63 to slide along the outer surface of the plastic lunch box, cutting the protrusions and burrs on the outer surface of the plastic lunch box. At the same time, since the inner wall of the control board 62 is also in contact with the outer surface of the plastic lunch box, when the annular blade 63 cuts the protrusions and burrs on the outer surface of the plastic lunch box, the plastic lunch box is fixed to prevent the plastic lunch box from being lifted by the annular blade 63 and separated from the mold in the case where the annular blade 63 is not sharp enough to directly cut off the protrusions and burrs. The chute 64 is opened on the outer wall of the guide rod 61. A first limit block is fixed at one end of the guide rod 61 away from the base 1. The first spring 65 is fixedly connected to the side of the first limit block close to the guide rod 61. The guide rod 61 penetrates through the annular sleeve 66, and the penetration part is in contact. When the control board 62 slides to the annular sleeve 66, it pushes the annular sleeve 66 to slide together with the control board 62. The bump 67 is fixedly connected to the inner wall of the annular sleeve 66. The outer wall of the bump 67 is in contact with the inner wall of the chute 64. Since the outer wall of the bump 67 is in contact with the inner wall of the chute 64, when the bump 67 moves, it slides along the inner wall of the chute 64. And since the chute 64 is spirally opened on the outer wall of the guide rod 61, when the bump 67 slides, it also rotates around the guide rod 61. The rotation of the bump 67 drives the annular sleeve 66 to rotate together. The striking rod 68 is hinged to the outer wall of the annular sleeve 66. When the annular sleeve 66 rotates, it drives the striking rod 68 to rotate around the guide rod 61. When the striking rod 68 rotates to the bottom surface of the control board 62, it strikes the control board 62. One end of the first spring 65 away from the first limit block is in contact with the side wall of the annular sleeve 66. When the control board 62 slides, it compresses the first spring 65. After the plastic lunch box is injection-molded, the upper mold 4 is raised, and by manually pushing the control board 62, the annular blade 63 is driven to cut the protrusions, burrs and other defects generated during the injection molding of the plastic lunch box on the outer surface of the plastic lunch box. At the same time, the control board 62 is used to fix the plastic lunch box, thereby preventing the plastic lunch box from automatically demolding and falling due to the push of the annular blade 63, solving the problem that the outer surface of the plastic lunch box may still have burrs and other defects after injection molding and is easy to scratch the user during use, and at the same time preventing the plastic lunch box from falling due to the bluntness of the annular blade 63;After removing the defects, the cut-off scraps are pushed into the collection box 5. At the same time, the sliding groove 64, the annular sleeve 66, and the convex block 67 are used to drive the knocking rod 68 to rotate, knocking on the control board 62, causing the control board 62 to shake above the collection box 5, driving the annular blade 63 to shake, so as to better collect the scraps into the collection box 5, facilitating recycling, and solving the problem that the trimmed scraps are directly scattered in the air, affecting the environment and causing waste.

[0023] When this embodiment works: after the plastic lunch box is formed, the electric telescopic rod is started to retract, and the electric telescopic rod drives the upper mold 4 to lift upward to demold the plastic lunch box. After the upper mold 4 is completely raised, the control board 62 is manually toggled, and the control board 62 slides along the guide rod 61, driving the annular blade 63 to slide along the outer surface of the plastic lunch box to cut the protrusions and burrs on the outer surface of the plastic lunch box. At the same time, since the inner wall of the control board 62 also fits the outer surface of the plastic lunch box, when the annular blade 63 cuts the protrusions and burrs on the outer surface of the plastic lunch box, the plastic lunch box is fixed. When the control board 62 slides to the annular sleeve 66, it pushes the annular sleeve 66 to slide together with the control board 62. When the control board 62 slides, it compresses the first spring 65. While the annular sleeve 66 slides, it also drives the convex block 67 to slide together. Since the outer wall of the convex block 67 fits the inner wall of the sliding groove 64, the convex block 67 slides along the inner wall of the sliding groove 64 when moving. And since the sliding groove 64 is spirally formed on the outer wall of the guide rod 61, the convex block 67 also rotates around the guide rod 61 when sliding. The rotation of the convex block 67 drives the annular sleeve 66 to rotate together. When the annular sleeve 66 rotates, it drives the knocking rod 68 to rotate around the guide rod 61. When the knocking rod 68 rotates to the bottom surface of the control board 62, it knocks on the control board 62.

[0024] Please refer to Figures 1-9, on the basis of the above embodiments, in another embodiment of the present invention, a grinding device for further smoothing the surface of the plastic lunch box is provided on the side of the trimming device. The grinding device includes a grinding rod 71, a gear 72, a rack 73, a slider 74, a second spring 75, a pressing rod 76 and a pressing block 77. A second limiting block is fixed on the side wall of the control board 62. The grinding rod 71 penetrates through the second limiting block and is rotatably connected at the penetration point. When the control board 62 slides, it drives the grinding rod 71 to move together. The grinding rod 71 is made of glass. The gear 72 is fixedly connected to the left end of the grinding rod 71. When the grinding rod 71 moves, it drives the gear 72 to move. The rack 73 is fixedly connected to the left side wall of the lower mold 3. The rack 73 and the gear 72 are meshed. Therefore, when the gear 72 moves, it also rotates, and the gear 72 drives the grinding rod 71 to rotate. When the grinding rod 71 rotates, it further grinds the possible protrusions remaining after the outer surface of the plastic lunch box is cut by the annular blade 63. The grinding rod 71 penetrates through the slider 74 and is slidably connected at the penetration point. Silk is pasted on the inner wall of the slider 74. The silk and the glass rub against each other repeatedly, causing the electrons on the glass to move onto the silk, making the grinding rod 71 negatively charged and generating suction to adsorb the plastic powder ground by the grinding rod 71 on the outer wall of the grinding rod 71. The second spring 75 is fixedly connected to the side wall of the slider 74. When the slider 74 slides along the grinding rod 71, it stretches the second spring 75. The end of the second spring 75 away from the slider 74 is fixedly connected to the side wall of the second limiting block. The pressing rod 76 is fixedly connected to the outer wall of the slider 74. The pressing block 77 is fixedly connected to the right side wall of the lower mold 3. When the pressing rod 76 moves to the pressing block 77, it is pushed by the pressing block 77 and moves away from the lower mold 3 along the side of the pressing block 77. The pressing rod 76 drives the slider 74 to slide along the grinding rod 71, causing the slider 74 to slide repeatedly on the grinding rod 71 for friction. After the grinding device trims the plastic lunch box, through the cooperation of the gear 72 and the rack 73, it drives the grinding rod 71 to rotate on the outer surface of the plastic lunch box, grinding the possible protrusions remaining after the annular blade 63 cuts, so that the outer surface of the plastic lunch box is smoother, solving the problem that the annular blade 63 may leave residues when cutting burrs and protrusions, and further improving the trimming effect of the plastic lunch box; while grinding the plastic lunch box, through the cooperation of the second spring 75, the pressing rod 76 and the pressing block 77, it drives the slider 74 with silk pasted on its inner wall to slide repeatedly on the outer wall of the glass grinding rod 71 for friction, making the grinding rod 71 negatively charged, thereby adsorbing the dust generated during grinding, solving the problem that plastic dust is light and forms flying dust after flying, which affects the environment, and at the same time further improving the collection efficiency of the scraps.

[0025] Above the base 1, there is a collection device for conveniently collecting waste materials such as burrs. The collection device includes an elastic airbag 81, a spray pipe 82, a baffle 83, an inclined block 84, a push rod 85, a hinge block 86, a third spring 87, a hinge rod 88, and a pressing plate 89. A third limit block is fixed to the side wall of the control board 62, and the elastic airbag 81 is fixedly connected to the side wall of the third limit block. When the slider 74 slides in the direction away from the lower mold 3, it squeezes the elastic airbag 81. The outer wall of the elastic airbag 81 is fixed with a spray pipe 82, and the spray pipe 82 is communicated with the elastic airbag 81. When the elastic airbag 81 is squeezed, the air inside is quickly ejected through the spray pipe 82 to blow air on the side of the lower mold 3. A fixed rod is fixed to the side wall of the control board 62, and the fixed rod passes through the baffle 83 and is rotatably connected at the passing position. When the elastic airbag 81 blows air on the side of the lower mold 3, the waste materials at the side of the plastic lunch box are blown above the baffle 83, and the waste materials slide down to the bottom along the baffle 83. The inclined block 84 is fixedly connected to the side of the bracket 2. When the control board 62 moves to the end of the guide rod 61, the baffle 83 also moves to the inclined block 84, and the baffle 83 rotates under the extrusion of the inclined block 84, so that the waste materials above the baffle 83 fall into the collection box 5. The push rod 85 is fixedly connected to the bottom surface of the control board 62. When the control board 62 slides, it also drives the push rod 85 to slide. The push rod 85 passes through the upper surface of the base 1 and is slidably connected at the passing position. The side wall of the hinge block 86 is slidably connected to the inner wall of the collection box 5. When the push rod 85 slides to the hinge block 86, it pushes the hinge block 86 to slide along the inner wall of the collection box 5. The third spring 87 is fixedly connected to the side wall of the hinge block 86, and the end of the third spring 87 away from the hinge block 86 is fixedly connected to the inner wall of the collection box 5. The hinge rod 88 is hinged to the side wall of the hinge block 86. When the hinge rod 88 moves at the hinged end with the hinge block 86, it also rotates. The pressing plate 89 is slidably connected to the inner wall of the collection box 5. The end of the hinge rod 88 away from the hinge block 86 is hinged to the side wall of the pressing plate 89. The rotation of the hinge rod 88 pushes the pressing plate 89 to slide along the inner wall of the collection box 5 in a fitting manner. The two pressing plates 89 approach each other to compact the waste materials. This collection device blows air on the side of the lower mold 3 by squeezing the elastic airbag 81 through the slider 74 while trimming the plastic lunch box, blows the waste materials cut from the side above the baffle 83, and cooperates with the inclined block 84 to fall when moving above the collection box 5, so as to collect the waste materials on the side, solve the problem that the waste materials on the side are easily directly dropped into the air, and at the same time avoid the accumulation of waste materials on the components of the grinding device, causing blockage and resulting in the jamming of the control board 62;After all the scraps enter the collection box 5, through the cooperation of the push rod 85, the hinge block 86, the third spring 87 and the hinge rod 88, the pressing plates 89 approach each other, compressing the scraps in the collection box 5, so that the scraps are stacked more tightly, thus preventing the scraps from being lifted by the vibration generated during the movement of the equipment in the collection box 5, solving the problem that the scraps are likely to form flying dust after collection and polluting the environment.

[0026] When this embodiment works: when the control board 62 slides, it drives the grinding rod 71 to move together. When the grinding rod 71 moves, it drives the gear 72 to move. When the gear 72 moves to the rack 73, since the gear 72 meshes with the rack 73, the gear 72 rotates while moving. The gear 72 drives the grinding rod 71 to rotate as well. When the grinding rod 71 rotates, it further grinds the possible protrusions remaining on the outer surface of the plastic lunch box after being cut by the annular blade 63. When the grinding rod 71 moves, it also drives the slider 74 to move. The movement of the slider 74 drives the extrusion rod 76 to move together. When the extrusion rod 76 moves to the extrusion block 77, under the thrust of the extrusion block 77, it moves away from the lower mold 3 along the side of the extrusion block 77. The extrusion rod 76 drives the slider 74 to slide along the grinding rod 71, while stretching the second spring 75. When the extrusion rod 76 moves to the position where it disengages from the protrusion of the extrusion block 77, the slider 74 slides towards the lower mold 3 under the pulling force of the second spring 75. The slider 74 repeatedly slides on the outer wall of the grinding rod 71, and the silk on the inner wall of the slider 74 rubs against the grinding rod 71, generating static electricity, which adsorbs the plastic powder ground by the grinding rod 71 on the outer wall of the grinding rod 71. When the control board 62 slides to the end of the guide rod 61, the plastic powder falls into the collection box 5 together by the knocking of the knocking rod 68.

[0027] When the slider 74 slides in the direction away from the lower mold 3, it squeezes the elastic airbag 81. The elastic airbag 81 is squeezed and the air inside is quickly extruded through the nozzle 82, blowing air to the side of the lower mold 3, and blowing the scraps at the corners of the side of the plastic lunch box above the baffle 83. The scraps slide down to the bottom along the baffle 83. When the control board 62 moves to the end of the guide rod 61, the baffle 83 also moves to the inclined block 84. The baffle 83 is squeezed by the inclined block 84 and rotates, causing the scraps above the baffle 83 to fall into the collection box 5. When the control board 62 slides, it also drives the push rod 85 to slide. When the push rod 85 slides to the hinge block 86, it pushes the hinge block 86 to slide along the inner wall of the collection box 5, while stretching the third spring 87. When the hinge block 86 slides, it drives the end of the hinge rod 88 hinged to the hinge block 86 to move. Also, the position of the end of the hinge rod 88 hinged to the pressing plate 89 remains unchanged in the vertical direction. Therefore, when the hinge rod 88 moves at the hinge end of the hinge rod 88 and the hinge block 86, it also rotates. The hinge rod 88 rotates and pushes the pressing plate 89 to slide along the inner wall of the collection box 5. The two pressing plates 89 approach each other and compact the scraps. When the control board 62 resets, the hinge block 86 is reset under the pulling force of the third spring 87.

[0028] 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 spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding die for plastic lunch box processing, comprising a base (1), characterized in that: A bracket (2) is fixed on the upper surface of the base (1), a lower mold (3) is fixed on the upper surface of the base (1), an electric telescopic rod penetrates through the upper surface of the bracket (2) and is slidably connected at the penetration, the bottom surface of the electric telescopic rod is fixed with an upper mold (4), an injection hole is formed in the upper surface of the upper mold (4), a collection box (5) penetrates through the base (1) and is slidably connected at the penetration, a burr trimming device for facilitating the cleaning of the surface of the plastic lunch box is arranged on the upper surface of the base (1), a polishing device for further smoothing the surface of the plastic lunch box is arranged on the side surface of the trimming device, and a collection device for facilitating the collection of burrs and other scraps is arranged above the base (1). Among them, the trimming device includes a guide rod (61), a control plate (62), an annular blade (63), a chute (64), a first spring (65), an annular sleeve (66), a convex block (67) and a knocking rod (68). The guide rod (61) is fixedly connected to the side wall of the base (1), the guide rod (61) penetrates through the control plate (62) and is slidably connected at the penetration, and the bottom surface of the control plate (62) is in contact with the upper surface of the base (1).

2. The injection molding die for processing plastic lunch boxes according to claim 1, wherein: The side wall of the control plate (62) is in contact with the side wall of the lower mold (3), the annular blade (63) is fixedly connected to the side wall of the control plate (62), the chute (64) is formed in the outer wall of the guide rod (61), a first limit block is fixed at one end of the guide rod (61) away from the base (1), and the first spring (65) is fixedly connected to the side of the first limit block close to the guide rod (61).

3. The injection molding die for plastic lunch box processing according to claim 2, wherein: The guide rod (61) penetrates through the annular sleeve (66) and is in contact at the penetration, the convex block (67) is fixedly connected to the inner wall of the annular sleeve (66), the outer wall of the convex block (67) is in contact with the inner wall of the chute (64), the knocking rod (68) is hinged to the outer wall of the annular sleeve (66), and the end of the first spring (65) away from the first limit block is in contact with the side wall of the annular sleeve (66).

4. An injection molding die for processing plastic lunch boxes according to claim 1, characterized in that: The polishing device includes a polishing rod (71), a gear (72), a rack (73), a slider (74), a second spring (75), a pressing rod (76) and a pressing block (77). A second limit block is fixed on the side wall of the control plate (62), the polishing rod (71) penetrates through the second limit block and is rotatably connected at the penetration.

5. An injection molding die for plastic lunch box processing according to claim 4, characterized in that: The gear (72) is fixedly connected to the left end of the polishing rod (71), the rack (73) is fixedly connected to the left side wall of the lower mold (3), the rack (73) is meshed with the gear (72), the polishing rod (71) penetrates through the slider (74) and is slidably connected at the penetration, and the second spring (75) is fixedly connected to the side wall of the slider (74).

6. The injection molding die for plastic lunch box processing according to claim 5, wherein: The end of the second spring (75) away from the slider (74) is fixedly connected to the side wall of the second limit block, the pressing rod (76) is fixedly connected to the outer wall of the slider (74), and the pressing block (77) is fixedly connected to the right side wall of the lower mold (3).

7. An injection molding die for plastic lunch box processing according to claim 6, characterized in that: The collection device includes an elastic airbag (81), a nozzle (82), a baffle (83), an inclined plane block (84), a push rod (85), a hinge block (86), a third spring (87), a hinge rod (88) and a pressing plate (89). A third limit block is fixed to the side wall of the control board (62), and the elastic airbag (81) is fixedly connected to the side wall of the third limit block. The nozzle (82) is fixed to the outer wall of the elastic airbag (81).

8. An injection molding die for plastic lunch box processing according to claim 7, characterized in that: The nozzle (82) is in communication with the elastic airbag (81). A fixed rod is fixed to the side wall of the control board (62). The fixed rod passes through the baffle (83) and is rotatably connected at the passing-through position. The inclined plane block (84) is fixedly connected to the side of the bracket (2). The push rod (85) is fixedly connected to the bottom surface of the control board (62). The push rod (85) passes through the upper surface of the base (1) and is slidably connected at the passing-through position. The side wall of the hinge block (86) is slidably connected to the inner wall of the collection box (5).

9. An injection molding die for plastic lunch box processing according to claim 8, characterized in that: The third spring (87) is fixedly connected to the side wall of the hinge block (86). One end of the third spring (87) away from the hinge block (86) is fixedly connected to the inner wall of the collection box (5). The hinge rod (88) is hinged to the side wall of the hinge block (86). The pressing plate (89) is slidably connected to the inner wall of the collection box (5). One end of the hinge rod (88) away from the hinge block (86) is hinged to the side wall of the pressing plate (89).

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