A trimming structure for plastic food containers

Abstract

The present invention provides a trimming processing structure for plastic food containers, belonging to the technical field of trimming the edges of plastic containers. The invention includes an operating table and a container to be cut, and also includes: a support grinding component, a dust cleaning component, and a material unloading stacking component; by simultaneously supporting the top and bottom of the nozzle and firmly clamping the container body, the cutting stress can be effectively isolated to prevent it from being transmitted through the nozzle, thereby improving the accuracy of cutting; through the rotation of the support table, the grinding column can not only push the nozzle waste away from the container body, but also grind the cutting edge of the container; while cutting, the air pressure change of the airbag during the compression and resetting process, combined with the unique layout of the nozzle and the nozzle, realizes the automatic air jet cleaning during the cutting process and the suction cleaning function after cutting, reducing the influence of impurities on the cutting quality and subsequent processing; through the rotation of the swing arm and the reception of the receiving tube, the automatic stacking processing of the container body is realized.

Description

Technical Field

[0001] The invention relates to the technical field of edge trimming of plastic containers, in particular to an edge trimming processing structure for plastic food containers. Background Art

[0002] Plastic food containers are often produced by injection molding machines using a one-mold, multi-cavity method, so that multiple identical food containers can be produced simultaneously. However, this method also results in the presence of plastic sprues between containers. In subsequent processes, the plastic sprues between food containers need to be cut off to ensure the beauty and practicality of the product.

[0003] The existing sprue material on the plastic products formed by one mold with multiple cavities is cut by a trimming machine or ultrasonic cutting. Regardless of the trimming method, most of them fix the container itself, but lack support for the sprue. When the cutter acts on the sprue of the plastic food container for cutting, the force generated by the cutter will first act on the sprue area. If there is no sufficient support structure at the sprue to disperse and absorb these forces, then these forces will be transmitted along the structure of the material like waves. Since plastic materials have certain elasticity and toughness, they will try to respond to these external forces by deformation. However, in the absence of sufficient support, this deformation is often uncontrollable. It may not only be limited to the sprue area, but also extend to the adjacent container parts. Due to the uneven transmission of cutting force at the sprue and the unexpected deformation of the material, the cutter may deviate from the predetermined cutting path, resulting in the occurrence of crooked cutting. Crooked cutting not only means uneven and irregular cutting edges, but also may cause damage to the container structure or functional loss. For example, if the sealing edge of the container is cut crooked, it may not be effectively sealed, thereby affecting the preservation and safety of food.

[0004] How to invent a plastic food container with a trimming structure to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides a trimming processing structure for a plastic food container, aiming to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides a trimming processing structure for plastic food containers, comprising an operating table and a container to be cut, wherein a mounting frame is fixedly arranged on the operating table, a cylinder is fixedly arranged on the top of the mounting frame, a piston rod is slidably arranged in the cylinder, the piston rod penetrates the side wall of the mounting frame and a pressing plate is fixedly connected to the end thereof, a plurality of annular cutting knives for cutting the container to be cut are fixedly arranged on the lower side of the pressing plate, and further comprising:

[0008] Support and polishing assembly: The support and polishing assembly is arranged on the operating table and the pressing plate, and is used to support the container to be cut and its water inlet, push away the cutting waste, and polish the cutting part of the container to be cut;

[0009] Dust cleaning component: The dust cleaning component is arranged on the supporting and grinding component, and is used to clean the plastic dust adhered to the cutting part of the annular cutter;

[0010] Unloading and stacking assembly: The unloading and stacking assembly is arranged on the supporting and grinding assembly, and is used to clamp the container to be cut, and to unload and stack the container to be cut after cutting is completed.

[0011] Preferably, the supporting and polishing assembly includes a positioning rod, a motor, a fixed seat, a fixed platform and an airbag, the positioning rod is fixedly connected to the upper side wall of the operating table, the upper end of the positioning rod is fixedly connected to a limit plate for limiting the container to be cut, the fixed seat is fixedly connected to the lower side wall of the operating table, the motor is fixedly connected to the fixed seat, the output end of the fixed seat is fixedly connected to a transmission shaft, the fixed platform is fixedly connected to the operating table, and the end of the transmission shaft passes through the fixed seat and the side walls of the fixed platform.

[0012] Preferably, the end of the transmission shaft is fixedly connected to a support platform, the side wall of the support platform is annularly provided with multiple support rods, and the ends of the support rods are fixedly installed with grinding columns for grinding the containers to be cut, and there is a distance between the grinding columns and the containers to be cut in an initial state.

[0013] Preferably, the airbag is fixedly connected to the lower side wall of the pressure plate, and a plurality of return springs are fixedly arranged in the inner cavity of the airbag, and the return springs are located on the inner side of the outer edge of the support platform. The airbag is arranged in a columnar shape, and the water inlet of the container to be cut is located on the inner side of the outer edge of the airbag.

[0014] Preferably, the end of the limit plate close to the motor is annularly arranged, and an installation groove is arranged inside the limit plate. An electromagnet is fixedly installed at one end of the installation groove away from the motor, and a magnetic clamp is slidably arranged in the installation groove. Slide grooves for limiting the magnetic clamp are arranged on both sides of the installation groove. The magnetic clamp is elastically connected to the electromagnet through a connecting spring. One end of the magnetic clamp in the initial state is located on the inner side of the ring at the end of the limit plate, and a spring is fixedly connected to the side wall of the magnetic clamp located on the inner side of the ring at the end of the limit plate.

[0015] Preferably, the grinding column is made of elastic material, the upper surface of the support rod is flush with the upper surface of the limit plate, the lower side of the water outlet of the container to be cut is in contact with the upper surface of the limit plate and the support rod, and the magnetism of the electromagnet when energized is opposite to the magnetism of the opposite surface of the magnetic clamp.

[0016] Preferably, the cleaning assembly includes a plurality of nozzles arranged in a ring shape on the edge of the airbag, the nozzles are connected to the inner cavity of the airbag, the ends of the nozzles penetrate the side walls of the corresponding annular cutters, and the ends of the nozzles are provided with nozzle openings.

[0017] Preferably, the number of the annular cutters is equal to that of the container body to be cut and they are arranged opposite each other. The annular cutters are located at the exact center of the nozzle. The nozzle is opposite to the water outlet cutting position. The distance between the nozzle and the bottom of the annular cutter is greater than the thickness of the water outlet of the container to be cut. A dustproof net is arranged at the end of the nozzle.

[0018] Preferably, the unloading and stacking assembly includes a swing arm and a first contact piece arranged on a positioning rod, the bottom of the swing arm is flush with the top of the fixed platform, the swing arm is fixedly connected to the transmission shaft, a second contact piece is fixedly installed on the end of the swing arm, and a receiving cylinder for receiving the container body to be cut is detachably installed on the upper end of the swing arm, and a battery is built into the swing arm.

[0019] Preferably, the second contact piece, the first contact piece, the electromagnet and the battery are electrically connected, there is a distance between the swing arm and the positioning rod in the initial state, the support rod in the initial state is located between the swing arm and the corresponding limit plate, the second contact piece is in contact with the first contact piece when the end of the swing arm is facing the positioning rod, and the receiving tube is located directly below the corresponding container to be cut when the end of the swing arm is facing the positioning rod.

[0020] The beneficial effects of the present invention are:

[0021] During the cutting process, the cutting stress is often easily transmitted to other parts of the container through the sprue, causing deformation or damage to the container. In the present application, by simultaneously supporting the top and bottom of the sprue and firmly clamping the container body, the cutting stress can be effectively isolated to prevent it from being transmitted through the sprue, thereby protecting the integrity and shape stability of the container. Since the cutting stress is effectively controlled, cutting deviation or irregularity caused by stress concentration is avoided, thereby improving the accuracy of cutting. Through the rotation of the support table, the grinding column can, on the one hand, push the sprue waste away from the container body, ensuring the timely separation of the sprue waste from the container body, and on the other hand, the cutting edge of the container can be polished, and its elastic design can adapt to the unevenness of the container edge to achieve uniform polishing.

[0022] While cutting, the air pressure change of the airbag during compression and resetting is utilized, combined with the layout design of the nozzle and the nozzle, to realize the automatic air jet cleaning during the cutting process and the air suction cleaning after cutting, reducing the influence of impurities on the cutting quality and subsequent processing; through the rotation of the swing arm, the adsorption effect of the electromagnet and the receiving function of the receiving tube, the automatic stacking processing of the container body is realized, and it is closely connected with the above-mentioned actions, together forming an efficient and orderly production flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0025] Figure 2 It is a front structural schematic diagram of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0026] Figure 3 It is a front cross-sectional structural schematic diagram of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0027] Figure 4 A plastic food container trimming structure provided by the embodiment of the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 5 It is a schematic diagram of a structure for placing containers to be cut in a trimming processing structure for plastic food containers provided by an embodiment of the present invention;

[0029] Figure 6 It is a schematic top view of a partial structure of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0030] Figure 7 It is a schematic diagram of a container to be cut and a limiting plate structure of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the position structure of a dust cleaning component of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0032] Fig. 9A plastic food container trimming structure provided by the embodiment of the present invention Figure 8 The enlarged structural diagram at B in the middle;

[0033] Fig.10 It is a schematic cross-sectional structure diagram of a positioning rod of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0034] Fig.11 It is a schematic cross-sectional structure diagram of a pressure plate of a trimming processing structure for a plastic food container provided by an embodiment of the present invention;

[0035] Fig.12 The invention is a schematic diagram of a receiving tube and a second contact piece structure of a trimming processing structure for a plastic food container provided by an embodiment of the present invention.

[0036] In the figure: 1. operating table; 2. mounting frame; 3. cylinder; 4. positioning rod; 5. motor; 6. air bag; 7. support platform; 8. swing arm; 10. container to be cut; 31. piston rod; 32. pressure plate; 33. annular cutter; 41. first contact piece; 42. limit plate; 43. mounting groove; 44. electromagnet; 45. connecting spring; 46. magnetic clamp block; 47. spring piece; 51. fixing seat; 52. transmission shaft; 53. fixing platform; 61. nozzle; 62. nozzle; 63. reset spring; 71. support rod; 72. grinding column; 81. second contact piece; 82. receiving tube. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1, refer to Figure 1-Figure 11 A trimming structure for plastic food containers, comprising an operating table 1 and a container 10 to be cut, a mounting frame 2 is fixedly arranged on the operating table 1, a cylinder 3 is fixedly arranged on the top of the mounting frame 2, a piston rod 31 is slidably arranged in the cylinder 3, the piston rod 31 passes through the side wall of the mounting frame 2 and a pressing plate 32 is fixedly connected to the end thereof, a plurality of annular cutting knives 33 for cutting the container 10 to be cut are fixedly arranged on the lower side of the pressing plate 32, and further comprising:

[0039] Support and grinding assembly: The support and grinding assembly is arranged on the operating table 1 and the pressing plate 32, and is used to support the container 10 to be cut and its water inlet, push away the cut waste, and grind the cut part of the container 10 to be cut;

[0040] Dust cleaning component: The dust cleaning component is arranged on the supporting and grinding component, and is used to clean the plastic dust adhered to the cutting part of the annular cutter 33;

[0041] Unloading and stacking assembly: The unloading and stacking assembly is arranged on the supporting and grinding assembly, and is used to clamp the container 10 to be cut, and to unload and stack the container 10 to be cut after cutting is completed.

[0042] Furthermore, the supporting grinding assembly includes a positioning rod 4, a motor 5, a fixed seat 51, a fixed platform 53 and an airbag 6. The positioning rod 4 is fixedly connected to the upper side wall of the operating table 1. The upper end of the positioning rod 4 is fixedly connected to a limiting plate 42 for limiting the container 10 to be cut, which is used to perform preliminary positioning of the container 10 to be cut to ensure the accuracy of the cutting position. The fixed seat 51 is fixedly connected to the lower side wall of the operating table 1. The motor 5 is fixedly connected to the fixed seat 51. The output end of the fixed seat 51 is fixedly connected to a transmission shaft 52. The fixed platform 53 is fixedly connected to the operating table 1. The end of the transmission shaft 52 passes through the side walls of the fixed seat 51 and the fixed platform 53.

[0043] The end of the transmission shaft 52 is fixedly connected to the support platform 7, and the motor 5 drives the support platform 7 to rotate through the transmission shaft 52. The side wall of the support platform 7 is annularly provided with multiple support rods 71, and the end of the support rod 71 is fixedly installed with a grinding column 72 for grinding the container 10 to be cut. Through the support platform 7 and the support rod 71, the bottom of the water outlet of the container 10 to be cut can be supported during the cutting process, and its edge can be polished after cutting. In the initial state, there is a distance between the grinding column 72 and the container 10 to be cut, so as to avoid the situation where the annular cutting knife 33 conflicts with the grinding column 72 when pressed down.

[0044] It should be noted that the airbag 6 is fixedly connected to the lower side wall of the pressure plate 32. When the pressure plate 32 moves downward, the airbag 6 can provide top support for the water outlet of the container 10 to be cut, and cooperate with the bottom support of the support rod 71 to effectively prevent the transmission of cutting stress. The inner cavity of the airbag 6 is fixedly provided with a plurality of return springs 63. The return springs 63 are located on the inner side of the outer edge of the support platform 7, ensuring that when the airbag 6 is pressed down with the pressure plate 32, the support platform 7 can effectively compress these return springs 63. The airbag 6 is arranged in a columnar shape, and the water outlet of the container 10 to be cut is on the inner side of the outer edge of the airbag 6, ensuring that the water outlet of the container 10 to be cut can be fully supported.

[0045] Further, refer to Figure 5-Figure 7The end of the limiting plate 42 close to the motor 5 is annularly arranged (in the present application, the main body of the container 10 to be cut is cup-shaped. In actual application, the specific shapes of the limiting plate 42 and the annular cutting knife 33 are adjusted according to the main body shape of the container 10 to be cut), which is used to place the main body of the container 10 to be cut. The limiting plate 42 is provided with a mounting groove 43 inside. An electromagnet 44 is fixedly installed at one end of the mounting groove 43 away from the motor 5. A magnetic clamp 46 is slidably arranged in the mounting groove 43. Slide grooves for limiting the magnetic clamp block 46 are arranged on both sides of the mounting groove 43. The magnetic clamp block 46 is elastically connected to the electromagnet 44 through a connecting spring 45. One end of the magnetic clamp block 46 in the initial state is located on the inner side of the ring at the end of the limiting plate 42. The side wall of the magnetic clamp block 46 located on the inner side of the ring at the end of the limiting plate 42 is fixedly connected with a spring piece 47. Through the action of the connecting spring 45 and the magnetic clamp block 46, effective support can be achieved for the main body of the container 10 to be cut of different specifications.

[0046] It should be noted that the grinding column 72 is made of elastic material, which can ensure that during the rotational grinding process, even if the edge of the container is uneven or slightly deformed, a certain contact pressure can be maintained to achieve uniform grinding. The upper surface of the support rod 71 is flush with the upper surface of the limit plate 42, and the lower side of the water outlet of the container 10 to be cut is in contact with the upper surfaces of the limit plate 42 and the support rod 71, ensuring that the bottom of the water outlet of the container 10 to be cut is subjected to uniform force. When the electromagnet 44 is energized, the magnetism of the electromagnet is opposite to the magnetism of the opposite surface of the magnetic clamp 46. At this time, the electromagnet 44 will adsorb the magnetic clamp 46 to make it out of the clamping state.

[0047] In this embodiment, the electromagnet 44 is energized, and the electromagnet 44 will attract the magnetic clamp 46 to compress the connecting spring 45. The container 10 to be cut is placed on the limit plate 42 manually (or by a robot), and the water outlet of the container naturally falls on the support rod 71 to achieve preliminary positioning and ensure the accuracy of the cutting position. After the placement is completed, the electromagnet 44 is powered off. At this time, under the elastic force of the connecting spring 45, the magnetic clamp 46 is reset to stabilize the main body of the container 10 to be cut.

[0048] The cylinder 3 is started, and the piston rod 31 drives the pressure plate 32 and the annular cutter 33 to press down. At this time, the support platform 7 remains stationary and does not rotate. The airbag 6 is pressed down with the pressure plate 32 to support the top of the nozzle of the container 10 to be cut. At the same time, the support rod 71 supports the container 10 to be cut from the bottom of the nozzle. The two work together to prevent the cutting stress from being transmitted to other containers through the nozzle, thereby ensuring the accuracy of cutting and the integrity of the container.

[0049] The annular cutter 33 completes the cutting action and cuts off the waste material of the water outlet. After the cutting is completed, the cylinder 3 drives the pressure plate 32 and the annular cutter 33 to rise and return to the initial position. At this time, the motor 5 starts and drives the support platform 7 to rotate through the transmission shaft 52. The support rod 71 and the grinding column 72 on the support platform 7 rotate accordingly. At this time, the grinding column 72 first pushes the waste material of the water outlet away from the container body, and then grinds the cutting edge of the container. The grinding column 72 is made of elastic material and can adapt to the unevenness or slight deformation of the edge of the container to ensure the uniformity of grinding. During the grinding process, the support rod 71 and the magnetic clamp 46 continue to provide stable support for the container to ensure the grinding quality. After the grinding process, the container has completed the edge cutting and grinding to meet the required quality standards.

[0050] By simultaneously supporting the top and bottom of the container's sprue (the bottom of the sprue is supported by the support rod 71, and the top is supported by the airbag 6 that is pressed down by the pressure plate 32), the cutting operation can be carried out more smoothly and efficiently, and the annular cutter 33 can accurately cut along the preset cutting line, quickly and cleanly cut off the sprue waste, and effectively prevent the cutting stress from being directly transmitted to other parts of the container through the sprue during the cutting process. This dual support structure ensures the stability and accuracy of the cutting, and avoids deformation or damage to the container due to stress concentration; through the rotation of the support platform 7, the grinding column 72 can, on the one hand, push the sprue waste away from the container body, ensuring the timely separation of the sprue waste from the container body, and avoiding potential damage or contamination of the container by the sprue waste during subsequent processing; on the other hand, it can also grind the cutting edge of the container to remove burrs, uneven parts and possible defects generated during the cutting process.

[0051] Example 2, refer to Figure 3-Figure 11 The cleaning component includes a plurality of nozzles 61 arranged in a ring at the edge of the airbag 6. The nozzles 61 are connected to the inner cavity of the airbag 6. The ends of the nozzles 61 penetrate the side walls of the corresponding annular cutters 33. When the airbag 6 moves downward, the airbag 6 will be squeezed by the water inlet of the container 10 to be cut and the support platform 7. A nozzle 62 is provided at the end of the nozzle 61. At this time, the gas in the airbag 6 will be ejected through the nozzle 62 at the end of the nozzle 61.

[0052] It should be noted that the number of the annular cutters 33 is equal to that of the main body of the container 10 to be cut and they are arranged opposite to each other, ensuring that the container main body can be effectively cut. The annular cutter 33 is located at the center of the nozzle 62, and the nozzle 62 is opposite to the cutting position of the water inlet, ensuring that the gas ejected or inhaled through the nozzle 62 can evenly act on the two side walls of the cutting position of the annular cutter 33, assisting in cutting and blowing away the generated plastic chips. The distance between the nozzle 62 and the bottom of the annular cutter 33 is greater than the thickness of the water inlet of the container 10 to be cut, ensuring that the nozzle 62 will not conflict with the container 10 to be cut. A dustproof net is provided at the end of the nozzle 62 to prevent plastic chips from entering the airbag 6. When the cylinder 3 controls the annular cutter 33 to move upward, the airbag 6 will perform an air suction action under the action of the reset spring 63 and the negative pressure. In this process, impurities that may adhere to the side walls of the cutting position of the annular cutter 33 are peeled off under the action of the suction, achieving automatic cleaning, and providing a clean environment for continuous production cutting.

[0053] In this embodiment, during the cutting process, when the airbag 6 moves downward with the pressure plate 32, it will be squeezed by the water outlet of the container 10 to be cut and the support platform 7. This squeezing effect causes the gas pressure in the airbag 6 to increase. As the gas pressure in the airbag 6 increases, the gas will be ejected through the nozzle 61 and the nozzle 62 at its end. The ejected gas directly acts on the two side walls of the cutting area of ​​the annular cutter 33, which helps to blow away the plastic chips and other impurities generated during the cutting process and keep the cutting area clean.

[0054] After cutting is completed, the cylinder 3 controls the annular cutter 33 to move upward. At this time, the airbag 6 performs an air suction action under the action of the return spring 63 and the negative pressure. During the air suction process, impurities (such as plastic chips, dust, etc.) that may adhere to the side wall of the cutting area of ​​the annular cutter 33 are peeled off under the action of the negative pressure, thereby realizing the automatic cleaning function of the cutting area.

[0055] In summary, the cleaning component cleverly utilizes the changes in air pressure during the compression and resetting process of the airbag 6, combined with the layout design of the nozzle 61 and the nozzle 62, to achieve automatic jet cleaning during the cutting process and suction cleaning after cutting. This design not only improves production efficiency and cutting quality, but also reduces the need and workload for manual cleaning.

[0056] Example 3, refer to Figure 10-12 The unloading and stacking assembly includes a swing arm 8 and a first contact piece 41 arranged on the positioning rod 4. The bottom of the swing arm 8 is flush with the top of the fixed platform 53. The swing arm 8 is fixedly connected to the transmission shaft 52. When the transmission shaft 52 rotates, the swing arm 8 will rotate accordingly. A second contact piece 81 is fixedly installed on the end of the swing arm 8. A receiving tube 82 for receiving the main body of the container 10 to be cut is detachably installed on the upper end of the swing arm 8. The swing arm 8 has a built-in battery.

[0057] It should be noted that the second contact piece 81, the first contact piece 41, the electromagnet 44 and the battery are electrically connected. When the second contact piece 81 contacts the first contact piece 41, the electromagnet 44 is energized. Because the magnetism of the electromagnet 44 when energized is opposite to the magnetism of the opposite surface of the magnetic clamp 46, the electromagnet 44 will absorb the magnetic clamp 46 to make it out of the clamping state. In the initial state, there is a gap between the swing arm 8 and the positioning rod 4. In the initial state, the support rod 71 is located between the swing arm 8 and the corresponding limit plate 42, indicating that the container body is first polished and then When the end of the swing arm 8 is facing the positioning rod 4, the second contact piece 81 contacts the first contact piece 41. At this time, the magnetic clamp 46 no longer clamps the container body. When the end of the swing arm 8 is facing the positioning rod 4, the receiving tube 82 is directly below the corresponding container 10 to be cut. The container body that has lost the clamping force will fall into the receiving tube 82 under the action of gravity. As the swing arm 8 continues to rotate, the subsequent container bodies will fall into the receiving tube 82 accordingly. In this way, the automatic stacking processing of the container bodies is completed, and they can be taken out later by a robot or manually.

[0058] In this embodiment, in the initial state: there is a distance between the swing arm 8 and the positioning rod 4, and the support rod 71 is located between the swing arm 8 and the limit plate 42, ensuring that the container body can smoothly enter the stacking process after being polished. At this time, the magnetic clamp 46 maintains a clamping state, and the container body is firmly clamped.

[0059] The swing arm 8 rotates: as the transmission shaft 52 rotates, the swing arm 8 starts to rotate, and a second contact piece 81 is installed at the end of the swing arm 8. When the swing arm 8 rotates to face the positioning rod 4, the second contact piece 81 contacts the first contact piece 41 on the positioning rod 4.

[0060] Function of electromagnet 44: The contact between second contact piece 81 and first contact piece 41 causes electromagnet 44 to be energized. Since the magnetism of electromagnet 44 when energized is opposite to the magnetism of the opposite surface of magnetic clamp 46, electromagnet 44 generates suction force to adsorb magnetic clamp 46 and make it out of the clamping state. At this time, the container body loses its clamping force.

[0061] The container body falls into the receiving tube 82: the container body that loses the clamping force falls into the receiving tube 82 installed on the upper end of the swing arm 8 under the action of gravity. The receiving tube 82 is located directly below the corresponding container 10 to be cut, ensuring that the container body can fall accurately.

[0062] Continuous stacking: As the swing arm 8 continues to rotate, subsequent container bodies fall into the receiving tube 82 in sequence under the same mechanism, thereby realizing automatic stacking of the container bodies.

[0063] Removing the stack: After the stacking is completed, the container body in the receiving tube 82 can be taken out by a robot or manually for subsequent processing.

[0064] In summary, the unloading stacking assembly realizes automatic stacking processing of the container body through the rotation of the swing arm 8, the adsorption effect of the electromagnet 44 and the receiving function of the receiving tube 82, thereby improving production efficiency and automation level.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A trimming structure for plastic food containers, comprising an operating table (1) and a container (10) to be trimmed, wherein a mounting frame (2) is fixedly arranged on the operating table (1), a cylinder (3) is fixedly arranged on the top of the mounting frame (2), a piston rod (31) is slidably arranged in the cylinder (3), the piston rod (31) passes through the side wall of the mounting frame (2) and a pressing plate (32) is fixedly connected to the end of the piston rod (31), a plurality of annular cutting knives (33) for trimming the container (10) to be trimmed are fixedly arranged on the lower side of the pressing plate (32), and the characteristics are as follows: Also includes: Support and polishing assembly: the support and polishing assembly is arranged on the operating table (1) and the pressing plate (32), and is used to support the container to be cut (10) and its water outlet, push away the cut waste, and polish the cut part of the container to be cut (10); The supporting and polishing assembly comprises a positioning rod (4), a motor (5), a fixing seat (51), a fixing platform (53) and an airbag (6); the positioning rod (4) is fixedly connected to the upper side wall of the operating platform (1); the upper end of the positioning rod (4) is fixedly connected to a limiting plate (42) for limiting the position of the container to be cut (10); the fixing seat (51) is fixedly connected to the lower side wall of the operating platform (1); the motor (5) is fixedly connected to the fixing seat (51); the output end of the fixing seat (51) is fixedly connected to a transmission shaft (52); the fixing platform (53) is fixedly connected to the operating platform (1); and the end of the transmission shaft (52) passes through the side walls of the fixing seat (51) and the fixing platform (53); The end of the transmission shaft (52) is fixedly connected to a support platform (7), the side wall of the support platform (7) is provided with a plurality of support rods (71) in an annular shape, and the end of the support rod (71) is fixedly installed with a grinding column (72) for grinding the container (10) to be cut, and in an initial state, there is a distance between the grinding column (72) and the container (10) to be cut; The airbag (6) is fixedly connected to the lower side wall of the pressing plate (32); a plurality of return springs (63) are fixedly arranged in the inner cavity of the airbag (6); the return springs (63) are located inside the outer edge of the support platform (7); the airbag (6) is arranged in a columnar shape; and the water inlet of the container (10) to be cut is located inside the outer edge of the airbag (6); The end of the limit plate (42) close to the motor (5) is annularly arranged, and a mounting groove (43) is arranged inside the limit plate (42). An electromagnet (44) is fixedly installed at one end of the mounting groove (43) away from the motor (5). A magnetic clamp (46) is slidably arranged in the mounting groove (43), and sliding grooves for limiting the magnetic clamp (46) are arranged on both sides of the mounting groove (43). The magnetic clamp (46) and the electromagnet (44) are elastically connected via a connecting spring (45). In an initial state, one end of the magnetic clamp (46) is located on the inner side of the ring-shaped end of the limit plate (42), and a spring (47) is fixedly connected to the side wall of the magnetic clamp (46) located on the inner side of the ring-shaped end of the limit plate (42); A dust cleaning component: the dust cleaning component is arranged on the supporting and polishing component, and is used to clean plastic dust adhering to the cutting position of the annular cutter (33); Unloading stacking assembly: the unloading stacking assembly is arranged on the supporting and grinding assembly, and is used to clamp the container (10) to be cut, and to unload and stack the container (10) to be cut after cutting is completed.

2. The edge trimming structure for a plastic food container according to claim 1, characterized in that: The grinding column (72) is made of elastic material, the upper surface of the support rod (71) is flush with the upper surface of the limit plate (42), the lower side of the water outlet of the container (10) to be cut is in contact with the upper surfaces of the limit plate (42) and the support rod (71), and the magnetism of the electromagnet (44) when energized is opposite to the magnetism of the opposite surface of the magnetic clamp (46).

3. The edge trimming structure for a plastic food container according to claim 1, characterized in that: The dust cleaning component comprises a plurality of nozzles (61) arranged in an annular shape at the edge of the airbag (6), the nozzles (61) being connected to the inner cavity of the airbag (6), the ends of the nozzles (61) penetrating the side walls of the corresponding annular cutters (33), and the ends of the nozzles (61) being provided with nozzle openings (62).

4. The edge trimming structure for a plastic food container according to claim 3, characterized in that: The number of the annular cutting knives (33) is equal to the main body of the container (10) to be cut and they are arranged opposite each other. The annular cutting knives (33) are located at the exact center of the nozzle (62). The nozzle (62) is opposite to the cutting position of the water outlet. The distance between the nozzle (62) and the bottom of the annular cutting knives (33) is greater than the thickness of the water outlet of the container (10) to be cut. A dustproof net is arranged at the end of the nozzle (62).

5. The edge trimming structure for a plastic food container according to claim 1, characterized in that: The unloading stacking assembly comprises a swing arm (8) and a first contact piece (41) arranged on a positioning rod (4); the bottom of the swing arm (8) is flush with the top of the fixed platform (53); the swing arm (8) is fixedly connected to the transmission shaft (52); a second contact piece (81) is fixedly mounted on the end of the swing arm (8); a receiving cylinder (82) for receiving the main body of the container (10) to be cut is detachably mounted on the upper end of the swing arm (8); and a storage battery is built into the swing arm (8).

6. The edge trimming structure for a plastic food container according to claim 5, characterized in that: The second contact piece (81), the first contact piece (41), the electromagnet (44) and the storage battery are electrically connected. In an initial state, there is a distance between the swing arm (8) and the positioning rod (4). In an initial state, the support rod (71) is located between the swing arm (8) and the corresponding limit plate (42). When the end of the swing arm (8) faces the positioning rod (4), the second contact piece (81) contacts the first contact piece (41). When the end of the swing arm (8) faces the positioning rod (4), the receiving tube (82) is located directly below the corresponding container (10) to be cut.

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