A positioning device for in-mold labels

Abstract

This utility model discloses a positioning device for in-mold labels, relating to the field of in-mold label technology. The utility model includes a labeling mechanism for positioning the label inside an injection mold so that the mold can embed it onto the outer wall of the material during injection molding. The labeling mechanism includes a shaped base plate and two molds, with a robotic arm mounted at the center of the top plate of the shaped base plate. This utility model utilizes a placement component, specifically an actuation baffle that drives a gear to rotate a toothed disc. The rotation of the toothed disc drives a sliding rod, which in turn drives a slider. This allows several suction cups to move closer or further apart, uniformly adsorbing and gripping the label from the edge of the in-mold label. This avoids uneven clamping forces that could cause the label to be pulled, preventing deformation and ensuring proper adhesion, thus guaranteeing the embedding quality of the in-mold label.

Description

Technical Field

[0001] This utility model belongs to the field of in-mold label technology, and in particular relates to a positioning device for in-mold labels. Background Technology

[0002] In-mold labeling (IMC) is a plastic molding technology in which pre-printed film labels are placed into the mold cavity during injection molding, blow molding, or vacuum forming. Molten plastic is then injected, fusing the label with the plastic substrate to form a seamless product. Compared to traditional post-labeling, IMC avoids adhesive contamination and peeling, making the labels scratch-resistant, chemically resistant, waterproof, and oil-resistant. Due to its superior characteristics, this technology is widely used in food packaging, daily chemical products, and electronic product casings. IMC labels require clamps to grip and position them inside the mold. However, IMC labels are usually made of flexible materials, making it easy for the clamps to pull on the labels during gripping. This pulling can cause stretching deformation, preventing the labels from adhering tightly to the mold wall and affecting the embedding quality. Therefore, we propose a positioning device for IMC labels. Utility Model Content

[0003] The purpose of this invention is to provide a positioning device for in-mold labels. By setting up a placement component, specifically an activation baffle that drives a gear to rotate a toothed disc. The rotation of the toothed disc then drives a sliding rod, which in turn moves a slider. This allows several suction cups to move closer or further apart, uniformly adsorbing and gripping the in-mold label from its edge. This avoids uneven clamping forces that could cause the label to be pulled, preventing deformation and ensuring proper adhesion. This solves the problem that existing in-mold labels require clamps to grip and position them inside the mold. However, in-mold labels are typically made of flexible materials, making them prone to being pulled during gripping. This pulling can cause stretching and deformation, preventing the label from adhering tightly to the mold wall and thus affecting the embedding quality.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a positioning device for in-mold labels, including a labeling mechanism. The labeling mechanism is used to position the label inside the injection mold so that the mold can be embedded on its outer wall during material injection. The labeling mechanism includes an irregularly shaped base plate and two molds. A robotic arm is installed at the center of the top plate of the irregularly shaped base plate. A connector is installed on the right side of the top plate of the robotic arm. The two molds are arranged one in front of the other and are horizontally mirrored about the irregularly shaped base plate. A frame is fitted around the outer side of the two molds. An injection module is installed at the center of the top plate of the frame. The robotic arm is a Kinova-GEN3 model and has multiple degrees of freedom, enabling it to move the connector. The injection module is an ENGEL-VC-200 / 80 model. A rectangular box is provided on the rear side of the connector. The bottom outer wall of the frame is installed on the side outer wall of the irregularly shaped base plate.

[0005] Furthermore, the labeling mechanism includes a placement component for smoothly gripping the label to prevent it from being stretched and deformed, and a labeling component disposed on the right side of the placement component for injecting molten material into the injection mold. The right outer wall of the placement component abuts against the left outer wall of the labeling component.

[0006] Furthermore, the placement component includes a rectangular cover installed on the back of a rectangular box. An identification module is installed at the center of the top plate on the outer wall of the back of the rectangular box. The front of the rectangular box has four slots arranged in a circumferential array around the rectangular box. A gear is located at the center of the interior of the rectangular box. A gear is meshed with the bottom right side of the gear. The gear has four arc grooves arranged in a circumferential array around the gear. By setting the meshing connection between the gear and the gear, the gear can drive the gear to rotate, causing the gear to rotate in the opposite direction to the gear. A rod is slidably connected to the inner wall of the arc groove. The back of the rod extends rearward, and a slider is installed at the center of the outer wall of the back of the rod.

[0007] Furthermore, the outer wall of the slider is slidably connected to the inner wall of the slot. A suction cup is installed at the center of the outer wall of the back of the slider. A baffle is provided on the back of the gear. The outer side wall of the baffle is installed on the inner wall of the rectangular box. The back of the gear passes through the baffle and is rotatably connected. A motor is installed at the center of the outer wall of the back of the baffle. The front output end of the motor is installed at the center of the back of the gear via a coupling. An X-shaped box is installed at the center of the outer wall of the back of the rectangular cover. An X-shaped cover is installed on the outer wall of the back of the X-shaped box. A shaped plate is installed at the center of the interior of the X-shaped box. The motor is a YE4-80M1-2 series three-phase asynchronous motor, and the motor is also compatible with a SINAMICS-V20 frequency converter. A push rod is installed at the center of the outer wall of the back of the shaped plate. The back output end of the push rod passes through the shaped plate and the X-shaped box and extends backward.

[0008] Furthermore, the rear output end of the first push rod is mounted on the rear outer wall of the rectangular cover via a coupling. Four square slots are provided at each of the four edges of the irregularly shaped plate. Two slide rods are installed in each of the four square slots of the irregularly shaped plate. Several slide rods are arranged in groups of two, forming four groups of slide rod assemblies. The slide rods are LINAK-LA36 type electric push rods, capable of smoothly outputting power outwards. The rear outer walls of several slide rods penetrate the irregularly shaped plate and the X-shaped box and extend rearwards. The rear outer walls of the slide rods are mounted on the front outer wall of the rectangular cover, and the front outer wall of the X-shaped cover is mounted on the rear outer wall of the connector.

[0009] Furthermore, the labeling assembly includes two tiered protrusions, which are respectively located on opposite sides of the two molds. Both tiered protrusions are mounted on a frame on opposite sides. The interiors of both tiered protrusions are hollow. A second push rod is installed inside each of the tiered protrusions. The output ends of the two second push rods on opposite sides penetrate the outer wall of the tiered protrusion and extend outwards. The output ends of the second push rods are mounted on the outer back wall of the mold via a coupling. The tiered protrusions are of the same model as the first push rod, also a LINAK-LA36 type electric push rod. Trapezoidal outer boxes are installed on the front and back sides of the right outer wall of the frame. The two trapezoidal outer boxes are horizontally mirrored front and back with the injection molding module as the center. The interiors of the two trapezoidal outer boxes are hollow. A top plate is installed on the top of each trapezoidal outer box. Furthermore, a lead screw is rotatably connected inside the trapezoidal outer box on the front side, and a slide rail is installed inside the trapezoidal outer box on the back side. A second motor is installed on the top plate of the lead screw, and the bottom of the second motor is installed on the top plate of the outer box. The bottom output end of the second motor is installed at the center of the top outer wall of the lead screw via a coupling. Irregularly shaped sliding plates are fitted on the outer sides of both the lead screw and the slide rail. Both irregularly shaped sliding plates are slidably connected to the inner wall of the top plate of the outer box. An internal thread is opened at the center of the irregularly shaped sliding plate on the front side. The irregularly shaped sliding plate on the front side is threaded to the outer wall of the lead screw via the internal thread. By setting the sliding connection between the irregularly shaped sliding plates and the lead screw, the lead screw can control the vertical displacement of the irregularly shaped sliding plates by its own rotation direction. The side of the two irregularly shaped sliding plates that are close to each other both penetrate the trapezoidal outer box and extend outward. An irregularly shaped support plate is installed on the side of the two irregularly shaped sliding plates that are close to each other, and the irregularly shaped support plate extends to the left.

[0010] This utility model has the following beneficial effects: 1. This utility model, by setting up a placement component, specifically an activation baffle, causes the gear to rotate via a drive gear. The rotation of the gear drives the insertion rod to slide, which in turn drives the slider to slide. This allows several suction cups to move closer or further apart, uniformly adsorbing and gripping the label from the edge of the mold. This avoids uneven clamping force on the label and prevents it from being pulled, thus preventing the label from deforming and affecting its adhesion, thereby ensuring the embedding quality of the label.

[0011] 2. This utility model, by setting up a labeling component, specifically involves starting a second motor to rotate a lead screw, which in turn rotates counterclockwise to drive the front irregularly shaped slide plate upwards. This causes the irregularly shaped slide plate to move upwards via an irregularly shaped support plate, thus adjusting the height of the irregularly shaped support plate. This allows the support plate to hold the bottom of the mold, ensuring that after the two molds are separated, the plastic products inside fall onto the irregularly shaped support plate, preventing the processed products from falling downwards and damaging other components. This, in turn, ensures the stable operation of the component placement process.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall front structure of this utility model; Figure 2 This is a schematic diagram of the irregularly shaped base plate structure of this utility model; Figure 3 This is a schematic diagram of the identification module structure of this utility model; Figure 4 This is a schematic diagram of the No. 1 push rod structure of this utility model; Figure 5 This is a schematic diagram of the irregular-shaped tray structure of this utility model; Figure 6 This is a cross-sectional schematic diagram of the trapezoidal outer box of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Labeling mechanism; 11. Placement component; 111. Irregularly shaped base plate; 1121. Robotic arm; 1122. Connector; 1131. Rectangular box; 1132. Rectangular cover; 1133. Groove; 1134. Identification module; 1141. Gear; 1142. Gear; 1143. Arc groove; 1151. Insert rod; 1152. Slider; 1153. Suction cup; 1161. Baffle; 1162. Motor 1; 1171. X-shaped box ; 1172, X-shaped cover; 1173, irregularly shaped plate; 1181, push rod No. 1; 1182, slide rod; 12, labeling assembly; 121, mold; 1221, frame; 1222, injection molding module; 1231, ladder protrusion; 1232, push rod No. 2; 1241, trapezoidal outer box; 1242, top plate of outer box; 1251, lead screw; 1252, slide rail; 126, motor II; 127, irregularly shaped slide plate; 128, irregularly shaped support plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-6As shown, this utility model is a positioning device for in-mold labels, including a labeling mechanism 1. The labeling mechanism 1 is used to position the label inside the injection mold so that the mold can be embedded on its outer wall during material injection. The labeling mechanism 1 includes an irregularly shaped base plate 111 and two molds 121. A robotic arm 1121 is installed at the center of the top plate of the irregularly shaped base plate 111. A connector 1122 is installed on the right side of the top plate of the robotic arm 1121. The two molds 121 are arranged one in front of the other, and the two molds 121 are horizontally mirrored about the irregularly shaped base plate 111. A frame is fitted on the outer side of the two molds 121. The frame 1221 has an injection molding module 1222 installed at the center of its top plate. A rectangular box 1131 is provided on the rear side of the connector 1122. The bottom outer wall of the frame 1221 is installed on the side outer wall of the irregular base plate 111. The labeling mechanism 1 includes a placement component 11, which is used to smoothly grasp the label to avoid the label being stretched and deformed. The labeling component 12 is located on the right side of the placement component 11 and is used to inject molten material into the injection mold. The right outer wall of the placement component 11 and the left outer wall of the labeling component 12 abut against each other. The placement component 11 includes a rectangular cover 1132, which is installed on the back of a rectangular box 1131. An identification module 1134 is installed at the center of the top plate on the outer wall of the back of the rectangular box 1131. Four slots 1133 are provided on the front of the rectangular box 1131, arranged in a circular array around the rectangular box 1131. A gear 1141 is located at the center of the interior of the rectangular box 1131. A gear 1142 is meshed with the bottom right side of the gear 1141. Four arc grooves 1141 are provided on the gear 1141. 143. Four arc grooves 1143 are arranged in a circular array around the gear disk 1141. A rod 1151 is slidably connected to the inner wall of each arc groove 1143. The back of the rod 1151 extends rearward. A slider 1152 is installed at the center of the outer wall of the back of the rod 1151. The outer wall of the slider 1152 is slidably connected to the inner wall of the groove 1133. A suction cup 1153 is installed at the center of the outer wall of the back of the slider 1152. A baffle 1161 is provided on the back of the gear 1142. The outer side wall of the baffle 1161 is installed on the rectangular box 1131. On the inner wall, the back of gear 1142 passes through baffle 1161 and is rotatably connected. Motor 1162 is installed at the center of the outer back wall of baffle 1161. The front output end of motor 1162 is installed at the center of the back of gear 1142 via a coupling. An X-shaped box 1171 is installed at the center of the outer back wall of rectangular cover 1132. An X-shaped cover 1172 is installed on the outer back wall of X-shaped box 1171. A shaped plate 1173 is installed at the center of the interior of X-shaped box 1171. A shaped plate 1173 is installed at the center of the outer back wall of shaped plate 1173. There is a push rod 1181. The output end of the push rod 1181 extends backward through the irregular plate 1173 and the X-shaped box 1171. The output end of the push rod 1181 is mounted on the outer wall of the back of the rectangular cover 1132 via a coupling. Four square slots are opened at the four edges of the irregular plate 1173. Two slide rods 1182 are installed in each of the four square slots of the irregular plate 1173. Several slide rods 1182 are arranged in groups of two, and several slide rod assemblies are arranged in four groups. Specifically, the baffle 1161 is activated, causing the gear 1141 to rotate via the drive gear 1142. The rotation of the gear 1141 then drives the insert rod 1151 to slide, which in turn drives the slider 1152 to slide. This allows the suction cups 1153 to move closer or further apart from each other, uniformly adsorbing and gripping the label from the edge of the mold, avoiding uneven clamping force and pulling of the label, preventing deformation of the label and affecting its adhesion, and thus ensuring the embedding quality of the label. The back outer walls of the slide rods 1182 all penetrate the irregular plate 1173 and the X-shaped box 1171 and extend backward. The back outer walls of the slide rods 1182 are installed on the front outer wall of the rectangular cover 1132, and the front outer wall of the X-shaped cover 1172 is installed on the back outer wall of the connector 1122. The labeling assembly 12 includes two stepped protrusions 1231, which are respectively located on opposite sides of the two molds 121. Both sides of the stepped protrusions 1231 are mounted on a frame 1221. The interiors of both stepped protrusions 1231 are hollow, and each step contains a second push rod 1232. The output ends of the two push rods 1232 on their closest sides penetrate the outer wall of the stepped protrusion 1231 and extend outwards. The output ends of the push rods 1232 are mounted on the outer back wall of the mold 121 via a coupling. The frame 1221 is located on the right side of the outer wall. Trapezoidal outer boxes 1241 are installed on both the front and back of the wall. The two trapezoidal outer boxes 1241 are arranged horizontally and mirror-likely with the injection molding module 1222 as the center. The interior of the two trapezoidal outer boxes 1241 is hollow. The top of the two trapezoidal outer boxes 1241 is equipped with an outer box top plate 1242. A lead screw 1251 is rotatably connected inside the trapezoidal outer box 1241 on the front side. A slide rail 1252 is installed inside the trapezoidal outer box 1241 on the back side. A second motor 126 is installed on the top plate of the lead screw 1251. The bottom of the second motor 126 is installed on the outer box top plate 1242. The bottom output end of the second motor 126 is installed on the lead screw 1241 via a coupling. At the center of the top outer wall of rod 1251, both the lead screw 1251 and the outer side of slide rail 1252 are fitted with irregularly shaped slide plates 127. Both irregularly shaped slide plates 127 are slidably connected to the inner wall of the outer box top plate 1242. The center of the irregularly shaped slide plate 127 on the front side is provided with an internal thread, and the irregularly shaped slide plate 127 on the front side is threaded to the outer wall of lead screw 1251 through the internal thread. By setting the labeling component 12, specifically by starting motor 126 to make lead screw 1251 rotate, the lead screw 1251 rotates counterclockwise to drive the front irregularly shaped slide plate 127 to slide upward, and the irregularly shaped slide plate 127 is driven by the irregularly shaped support plate 128. The irregularly shaped sliding plate 127 on the back moves upward, thereby adjusting the height of the irregularly shaped support plate 128 so that it can support the bottom of the mold 121. After the two molds 121 are separated, the plastic products inside will fall onto the irregularly shaped support plate 128, preventing the processed products from falling downward and causing damage to other components. This ensures that the work of placing the component 11 can proceed stably. The two irregularly shaped sliding plates 127 extend outward through the trapezoidal outer box 1241 on the side where they are close to each other. The irregularly shaped support plate 128 is installed on the side where the two irregularly shaped sliding plates 127 are close to each other, and the irregularly shaped support plate 128 extends to the left.

[0018] A specific application of this embodiment is as follows: The robotic arm 1121 is activated, causing it to move the X-shaped cover 1172 via the connector 1122. Then, the X-shaped cover 1172 moves the X-shaped box 1171, which in turn moves the rectangular cover 1132, which moves the rectangular box 1131 to the top of the label. Then, the identification module 1134 is activated. This module, a Cognex In-Sight 8000, can identify the size of the label. The identification module 1134 then activates motor 1162, which drives gear 1142 to rotate via its output. Gear 1142 then drives gear 1141 to rotate. When gear 1141 rotates clockwise, it moves several insert rods 1151 away from each other via the arc groove 1143. Conversely, when gear 1141 rotates counterclockwise, the opposite occurs. This process allows the gear 1151 to move away from the label. The rotation of 141 causes the arc groove 1143 to move several insert rods 1151 closer or further apart, and causes the slider 1152 to move the suction cup 1153. Then, the first push rod 1181 is activated so that its output end pushes the rectangular cover 1132 to move. Then, the suction cup 1153 gradually approaches the label and evenly adsorbs and grabs its edge to avoid pulling the label. Then, the first push rod 1181 is retracted and the robotic arm 1121 is activated again so that the robotic arm 1121 moves the label grabbed by the suction cup 1153 between the two molds 121 through the connector 1122. Then, the first push rod 1181 is activated so that it pushes the suction cup 1153 to move into the interior of the mold 121 so that the suction cup 1153 positions the adsorbed label on the inner wall of the mold 121. Then, the above operation is repeated to position the label on the inner wall of the mold 121 on the other side. Then, the placement component 11 is reset. Next, the two push rods 1232 are activated to push the two molds 121 closer together to form a sealed container. Then, the motor 126 is activated, causing the lead screw 1251 to rotate counterclockwise. This rotation, via a threaded connection, moves the irregularly shaped slide plate 127 upwards. The slide plate 127 then moves the irregularly shaped pallet 128 upwards, positioning it at the bottom center of the mold 121. The injection module 1222 is then activated to inject material into the mold 121. The injection module 1222 injects gas into the material, causing it to expand. The label previously positioned inside the mold 121 is then embedded in the outer wall of the material. The injection module 1222 then cuts off the part of the material connected to it. After the material inside the mold 121 cools and solidifies, the two push rods 1232 pull the mold 121 back to its original position. The processed material falls onto the irregularly shaped pallet 128, making it easy for workers to remove it from the equipment.

[0019] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0020] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning device for in-mold labels, characterized in that, include: A labeling mechanism is used to position a label inside an injection mold so that the mold can be embedded on its outer wall during material injection. The labeling mechanism includes an irregularly shaped base plate and two molds. A robotic arm is installed at the center of the top plate of the irregularly shaped base plate, and a connector is installed on the right side of the top plate of the robotic arm. The two molds are arranged one in front of the other, and the two molds are horizontally mirrored with the irregular base plate as the center. A frame is fitted on the outside of the two molds, and an injection molding module is installed at the center of the top plate of the frame. The connector has a rectangular box on its rear side, and the bottom outer wall of the frame is mounted on the side outer wall of the irregular base plate.

2. The positioning device for in-mold labels according to claim 1, characterized in that, The labeling mechanism includes a placement component, which is used to smoothly grasp the label and prevent the label from being stretched and deformed; A labeling assembly is disposed to the right of the placement assembly, and the labeling assembly is used to inject molten material into the injection mold; The right outer wall of the placement component abuts against the left outer wall of the labeling component.

3. The positioning device for in-mold labels according to claim 2, characterized in that, The placement component includes a rectangular cover, which is installed on the back of a rectangular box. An identification module is installed at the center of the top plate on the outer wall of the back of the rectangular box. The front of the rectangular box has four slots, which are arranged in a circular array around the rectangular box. A toothed disc is provided at the center of the interior of the rectangular box. A gear is meshed with the bottom right side of the toothed disc. The toothed disc has four arc grooves, which are arranged in a circular array around the toothed disc. The inner wall of the arc groove is slidably connected to a plug rod, the back of the plug rod extends rearward, and a slider is installed at the center of the outer wall of the back of the plug rod.

4. The positioning device for in-mold labels according to claim 3, characterized in that, The outer wall of the slider is slidably connected to the inner wall of the slot. A suction cup is installed at the center of the outer wall of the back of the slider. A baffle is provided on the back of the gear. The outer side wall of the baffle is installed on the inner wall of the rectangular box. The back of the gear passes through the baffle and is rotatably connected. A motor is installed at the center of the outer wall of the back of the baffle. The front output end of the motor is installed at the center of the back of the gear through a coupling. An X-shaped box is installed at the center of the outer wall of the back of the rectangular cover. An X-shaped cover is installed on the outer wall of the back of the X-shaped box. A shaped plate is installed at the center of the interior of the X-shaped box. A push rod is installed at the center of the outer wall of the back side of the irregular plate. The output end of the push rod passes through the irregular plate and the X-shaped box and extends backward.

5. A positioning device for in-mold labels according to claim 4, characterized in that, The output end of the first push rod is mounted on the outer wall of the back of the rectangular cover via a coupling. Four square holes are provided at the four edges of the irregular plate. Two slide rods are provided in each of the four square holes of the irregular plate. Several slide rods are arranged in groups of two, and several slide rod assemblies are arranged in a total of four groups of slide rod assemblies. The back outer walls of several of the slide rods penetrate the irregular plate and the X-shaped box and extend backward. The back outer walls of the slide rods are installed on the front outer wall of the rectangular cover, and the front outer wall of the X-shaped cover is installed on the back outer wall of the connector.

6. A positioning device for in-mold labels according to claim 5, characterized in that, The labeling assembly includes two tiered protrusions, which are respectively located on the opposite sides of the two molds. The opposite sides of the two tiered protrusions are both mounted on a frame. The interior of each tiered protrusion is hollow, and a second push rod is installed inside each tiered protrusion. The output ends of the two second push rods on the side closest to each other penetrate the outer wall of the tiered protrusion and extend outward. The output ends of the second push rods are mounted on the outer wall of the back of the mold via a coupling. The frame has trapezoidal outer boxes installed on both the front and back sides of its right outer wall. The two trapezoidal outer boxes are arranged horizontally and mirror each other with the injection molding module as the center. The interior of the two trapezoidal outer boxes is hollow, and the top of the two trapezoidal outer boxes is equipped with a top plate.

7. A positioning device for in-mold labels according to claim 6, characterized in that, A lead screw is rotatably connected inside the trapezoidal outer box located on the front side, and a slide rail is installed inside the trapezoidal outer box located on the back side. A second motor is provided on the top plate of the lead screw, and the bottom of the second motor is installed on the top plate of the outer box. The bottom output end of the second motor is installed at the center of the top outer wall of the lead screw through a coupling. Irregularly shaped sliding plates are fitted on the outer sides of both the lead screw and the slide rail. Both irregularly shaped sliding plates are slidably connected to the inner wall of the top plate of the outer box. An internal thread is provided at the center of the irregularly shaped sliding plate located on the front side, and the irregularly shaped sliding plate located on the front side is threaded to the outer wall of the lead screw through the internal thread. Among them, the two irregularly shaped slides are close to each other on one side, both of which penetrate the trapezoidal outer box and extend outward. An irregularly shaped support plate is installed on the side of the two irregularly shaped slides that are close to each other, and the irregularly shaped support plate extends to the left.

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