A lunch box forming and manufacturing apparatus for plastic products

Abstract

The application discloses a lunch box forming and manufacturing device for plastic products, relates to the technical field of plastic lunch box processing, and is characterized in that the outer side of the traction cylinder is uniformly provided with adhering holes, the inner wall of the traction cylinder is uniformly provided with gas collecting boxes, the outer side of each gas collecting box is uniformly provided with air suction holes, the outer side of the conveying belt is uniformly provided with adhering holes, the top of each air suction box is uniformly provided with suction holes, and a total air pipe is connected between the output end of the conversion air pump and the side of the adjacent air suction box. The plastic sheet is fixed by being adhered to the clamping pieces on both sides through the rotating bidirectional screw rod, air is sucked by the conversion air pump on both sides, the original air in the air suction box is sucked away, the plastic sheet can be closely adhered to the conveying belt, the plastic sheet is prevented from slipping during conveying, the horizontal positioning of the clamping pieces and the vertical positioning of the conveying belt guarantee the positioning accuracy of the plastic sheet, the forming quality and cutting precision of the subsequent plastic lunch box are guaranteed, and the production efficiency of the product is improved.

Description

Technical Field

[0001] This invention relates to the field of plastic lunchbox processing technology, specifically to a plastic lunchbox molding and manufacturing equipment. Background Technology

[0002] Compression molding is a method for manufacturing plastic lunch boxes. Compression molding is a process of molding heated plastic sheets to obtain finished products. The specific steps are as follows: First, the plastic sheet is heated and softened. Then, the softened plastic sheet is fed into the mold in sections in a stepping manner. The upper and lower molds are used to press the plastic sheet into the shape of a lunch box. After cooling, solidification and cutting, the finished plastic lunch box is finally obtained.

[0003] In existing methods, when heated and softened plastic sheets are fed between the upper and lower mold bases, the softened plastic sheets are conveyed into the mold using the traction of conveying rollers. However, existing conveying rollers have difficulty in laterally positioning plastic sheets of different widths during conveying. Furthermore, slippage easily occurs between the traditional conveying rollers and the conveyed plastic sheets during conveying, causing the position of the plastic sheet to deviate from the intended position when it enters the mold. After the mold is closed, the deviated plastic sheet is very likely to cause product deformation. Moreover, the deviated plastic sheet needs to be repositioned before the subsequent molding and processing of the lunch box can continue, reducing the production efficiency of the lunch box. Summary of the Invention

[0004] This invention provides a lunchbox molding and manufacturing equipment for plastic products, which can effectively solve the problems in the prior art where existing conveying rollers have difficulty in laterally positioning plastic sheets of different widths when conveying plastic sheets, and where slippage easily occurs between the traditional conveying rollers and the conveyed plastic sheets during conveying. This causes the position of the plastic sheet to deviate from the predetermined position when it is conveyed into the mold. After the mold is closed, the deviated plastic sheet is very likely to cause product molding deformities, and the deviated plastic sheet needs to be repositioned before the subsequent lunchbox molding process can continue, which reduces the production efficiency of lunchboxes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plastic lunchbox molding and manufacturing equipment, including a processing table, a lifting cylinder is provided on the top of the processing table, an upper mold base is connected to the output end of the lifting cylinder, a lower mold base is installed on the top of the processing table, and a traction cleaning component is provided on the top of the processing table, the traction cleaning component including a traction motor;

[0006] A traction motor is installed at one corner of the top of the processing table, and a rotating frame is rotatably installed at one end of the top of the processing table. One end of each of the two rotating frames is connected to a drive wheel, and a traction cylinder is connected between the rotating frames. Fitting holes are evenly opened on the outer side of the traction cylinder.

[0007] A support frame is welded in the middle inside the traction cylinder. Mounting slots are movably installed at both ends inside the traction cylinder. A bidirectional screw is rotatably installed inside the support frame. The two ends of the bidirectional screw are connected to the mounting slots by threads. Moving openings are evenly opened at both ends of the traction cylinder. Clamping pieces are installed inside the moving openings and are installed inside adjacent mounting slots.

[0008] The inner wall of the traction cylinder is uniformly equipped with air collection boxes, and the outer side of the air collection boxes is uniformly provided with air suction holes. An air suction pipe is installed at one corner of the top of the processing table. One end of the air suction pipe is connected to an air collection ring. The air suction pipe passes through the interior of the adjacent drive wheel and is connected to the air collection ring. A sealing ring is rotatably installed on one side of the air collection ring. The sealing ring and one end of the adjacent air collection box are both connected to a connecting air pipe.

[0009] Driven wheels are rotatably mounted on both sides of the top of the processing table. A drive belt covers the drive wheel and the adjacent driven wheel. Rotary rollers are rotatably mounted on both sides of the top of the processing table. A conveyor belt covers the outer side of the two rotary rollers located on the same side.

[0010] The conveyor belt has uniformly distributed fitting holes on its outer side. An air suction box is installed between two rollers on the same side. The top of the air suction box has uniformly distributed adsorption holes. A conversion air pump is installed on both sides of the bottom of the processing table. The output end of the conversion air pump is connected to a main air pipe in the middle of one side of the adjacent air suction box.

[0011] According to the above technical solution, the input end of the traction motor is electrically connected to the output end of the external power supply, the fitting hole corresponds to the position of the adjacent air intake hole, and the opening end of the air intake pipe is connected to the air intake end of the external air intake pump.

[0012] According to the above technical solution, a fixing clip is welded to the bottom of the clip, and the fixing clip is embedded in the adjacent mounting groove;

[0013] The top surface of the conveyor belt is higher than the top surface of the lower mold base, and the input end of the conversion air pump is electrically connected to the output end of the external power supply.

[0014] According to the above technical solution, dust collection boxes are installed at both ends of one side of the air suction box. A connecting hole is opened at the junction of the dust collection box and the air suction box. A baffle is slidably installed inside the dust collection box. A shielding electric push rod is installed on both sides of the top of the processing table. The output end of the shielding electric push rod is connected to the middle of the bottom of the adjacent baffle. A dust collection pipe is evenly connected to one side of the dust collection box. A nozzle is connected to the top of the dust collection pipe.

[0015] According to the above technical solution, a dust collection box is installed at both ends on the other side of the dust removal box. A communication port is opened between the dust collection box and the dust removal box. An isolation net is installed inside the communication port on the dust collection box. A dust suction port is opened on the top of the dust collection box. A collection box is slidably installed on the bottom of the dust collection box.

[0016] According to the above technical solution, the input end of the shielding electric push rod is electrically connected to the output end of the external power supply, the contact surface between the baffle and the dust collection box is tightly fitted, and the nozzle is horn-shaped.

[0017] According to the above technical solution, a cooling demolding assembly is provided on the top of the processing table, and the cooling demolding assembly includes a cooling water tank;

[0018] A cooling water tank is installed at the bottom of the processing table. A water inlet pipe is connected to the top of one side of the cooling water tank. A distribution box is installed on one side of the upper mold base. A water supply hose is connected between the bottom of one side of the cooling water tank and one end of the distribution box. Distribution pipes are evenly installed inside the upper mold base. A water outlet box is installed on the other side of the upper mold base. One end of the distribution pipe passes through one side of the upper mold base and connects to one side of the distribution box. The other end of the distribution pipe passes through the other side of the upper mold base and connects to one side of the water outlet box. A water outlet pipe is connected to the middle of the bottom of the water outlet box.

[0019] A steam tank is installed on the top of the water outlet box. Electric valves are evenly installed on one side of the steam tank. A steam pipe is installed on the top inner side of the upper mold base. The open end of the steam pipe passes through one side of the upper mold base and is connected to the adjacent electric valve. Branch pipes are evenly connected to the bottom of the steam pipe. A branch hole is opened at the bottom of the branch pipe at the bottom of the upper mold base. The open end of the bottom of the branch pipe is connected to the adjacent branch hole.

[0020] According to the above technical solution, a sealing box is uniformly installed in the middle of the diversion pipe, an impeller is rotatably installed in the middle of the sealing box, a water passage hole is opened on the outside of the impeller, a rotating shaft is connected to both ends of the rotating central shaft of the impeller, and a cam is installed on the outside of the rotating shaft.

[0021] According to the above technical solution, a side spray pipe is installed on the inner outer ring of the upper mold base, and a gas distribution pipe is evenly connected to the bottom of the side spray pipe. A side spray hole is opened at the bottom of the upper mold base at the bottom of the gas distribution pipe, and the bottom opening end of the gas distribution pipe is connected to the adjacent side spray hole.

[0022] According to the above technical solution, a heat-conducting plate is sleeved on the outside of the diversion pipe and the rotating shaft, and the two sides of the heat-conducting plate are in contact with the inside of the upper mold base.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Equipped with a traction cleaning component, the rotating bidirectional screw, under the connection of the thread and the limiting action of the moving port, drives the clamping plates inside the mounting slots at both ends to move along the moving port, so that the two sides of the plastic sheet fit with the clamping plates on both sides. By using the clamping plates, the position of plastic sheets of different widths is centered and fixed, preventing the plastic sheet from swinging laterally at the top of the traction cylinder. It has a wide range of applications.

[0025] The traction motor operates in a step-by-step manner, driving the traction cylinder to rotate. The traction cylinder has fitting holes on its surface. Under the rotational connection of the air collecting ring and the sealing ring, the external air pump draws the air out of the air collecting box. This allows the traction motor to transport the top plastic sheet while simultaneously ensuring that the softened plastic sheet adheres tightly to the top of the traction cylinder, preventing the plastic sheet from shifting left or right during transport. At the same time, the traction motor synchronously drives the conveyor belt to rotate. The switching air pumps on both sides draw air out of the original air inside the suction box, allowing the plastic sheet to adhere tightly to the conveyor belt and preventing slippage during transport. The fitting holes on the traction cylinder surface and the fitting holes on the conveyor belt surface work together to ensure precise positioning of the plastic sheet. The centered positioning of the clamping piece and the longitudinal positioning of the conveyor belt work together to ensure the positioning accuracy of the plastic sheet, guaranteeing the molding quality and cutting precision of the subsequent plastic lunch boxes and improving production efficiency.

[0026] Meanwhile, when there is dust and debris on the top surface of the lower mold base, the baffle descends, controlling the conversion air pump on one side of the dust removal pipe to switch to inflation mode. The injected air is sprayed out from the nozzle to clean the dust on the surface of the lower mold base. The conversion air pump on the side of the dust collection box switches to suction mode, allowing external air to enter the dust collection box from the suction port. This, combined with the air sprayed from the nozzle, cleans the surface of the lower mold base, causing dust and impurities on the surface of the lower mold base to enter the dust collection box. This prevents dust from mixing with the softened plastic sheet during the pressing and molding of the plastic lunch box, improving product quality. At the same time, the conversion air pump can perform both adsorption and dust removal functions.

[0027] 2. Equipped with a cooling and demolding assembly, when the upper and lower mold bases are closed, cold water from the cooling water tank enters the distribution pipe through the water supply hose and the distribution box. Under the heat conduction of the heat conduction plate, the distribution pipe cools the upper mold base, allowing the molded lunch box to harden quickly. At the same time, when the cooling water flows through the sealed box, it impacts the impeller to rotate. The rotation of the impeller drives the rotating shaft and cam to rotate. The rotation of the cam generates a deflection force that drives the adjacent heat conduction plate to vibrate. Under the transmission of the vibration, the upper mold base vibrates, causing the pressed lunch box to separate quickly from the upper mold base.

[0028] Meanwhile, during cooling, some of the cooling water evaporates into steam under high temperature. The steam rises and enters the steam tank. When the upper mold base separates from the lower mold base for demolding, the electric valve opens, and the steam inside the steam tank enters the steam pipe. After flowing through the branch pipe, the steam is finally ejected from the branch hole. The ejected steam can exert a force on the material that is in contact with the upper mold base, causing the material to quickly separate from the upper mold base, avoiding the molded material from sticking to the upper mold base, improving demolding efficiency, and speeding up production.

[0029] In summary, the external air pump in the cooling and demolding assembly delivers air into the side spray pipe. The delivered air is then ejected through the air distribution pipe and side spray holes. The ejected gas helps separate the molded material from the upper mold base and also forms an air wall to prevent external dust from entering between the upper and lower mold bases. Combined with the air ejected from the nozzle in the traction cleaning assembly to clean the surface of the lower mold base, the cleanliness between the upper and lower mold bases is further ensured, thereby guaranteeing the molding quality of the plastic lunch box. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0031] In the attached diagram:

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the traction cleaning component of the present invention;

[0034] Figure 3 This is a schematic diagram of the installation structure of the traction cylinder of the present invention;

[0035] Figure 4 This is a schematic diagram of the installation structure of the gas collection box of the present invention;

[0036] Figure 5 This is a schematic diagram of the installation structure of the bidirectional lead screw of the present invention;

[0037] Figure 6 This invention comes from Figure 5 A schematic diagram of structure A;

[0038] Figure 7 This is a schematic diagram of the installation structure of the nozzle of the present invention;

[0039] Figure 8 This is a schematic diagram of the installation structure of the dust collection box of the present invention;

[0040] Figure 9 This invention comes from Figure 8 A schematic diagram of the B structure;

[0041] Figure 10 This is a schematic diagram of the cooling and demolding assembly of the present invention;

[0042] Figure 11 This is a schematic diagram of the installation structure of the heat-conducting plate of the present invention;

[0043] Figure 12 This is a schematic diagram of the installation structure of the steam pipe of the present invention;

[0044] Figure 13This is a schematic diagram of the installation structure of the sealing box of the present invention;

[0045] Figure 14 This invention comes from Figure 13 A schematic diagram of the C-structure;

[0046] The diagram labels are: 1. Machining table; 2. Lifting cylinder; 3. Upper mold base; 4. Lower mold base;

[0047] Traction cleaning assembly; 501. Traction motor; 502. Drive wheel; 503. Rotating frame; 504. Traction cylinder; 505. Fitting hole; 506. Support frame; 507. Mounting slot; 508. Two-way lead screw; 509. Moving port; 510. Clamping plate; 511. Fixing clip; 512. Air collection box; 513. Air intake port; 514. Air intake pipe; 515. Air collection ring; 516. Sealing ring; 517. Connecting air pipe; 518. Driven wheel 519. Drive belt; 520. Rotary roller; 521. Conveyor belt; 522. Fitting hole; 523. Suction box; 524. Adsorption hole; 525. Connecting hole; 526. Dust collection box; 527. Baffle; 528. Shielding electric actuator; 529. Dust collection pipe; 530. Nozzle; 531. Converter air pump; 532. Main air pipe; 533. Dust collection box; 534. Connecting port; 535. Isolation net; 536. Suction port; 537. Collection box;

[0048] Cooling and demolding assembly; 601, Cooling water tank; 602, Water supply hose; 603, Water inlet pipe; 604, Diverter box; 605, Diverter pipe; 606, Sealing box; 607, Impeller; 608, Water passage hole; 609, Rotating shaft; 610, Cam; 611, Heat conduction plate; 612, Water outlet box; 613, Water outlet pipe; 614, Steam tank; 615, Electric valve; 616, Steam pipe; 617, Branch pipe; 618, Branch hole; 619, Side spray hole; 620, Side spray pipe; 621, Air distribution pipe. Detailed Implementation

[0049] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0050] Example: Figure 1-14As shown, this invention provides a technical solution for a plastic lunchbox molding and manufacturing equipment. The equipment includes a processing table 1, a lifting cylinder 2 on the top of the processing table 1, an upper mold base 3 connected to the output end of the lifting cylinder 2, a lower mold base 4 mounted on the top of the processing table 1, and a traction cleaning assembly 5 on the top of the processing table 1. The traction cleaning assembly 5 includes a traction motor 501, a drive wheel 502, a rotating frame 503, a traction cylinder 504, a fitting hole 505, a support frame 506, a mounting groove 507, a bidirectional lead screw 508, a moving port 509, and a clamping piece 510. 511. Fixing clip; 512. Air collection box; 513. Air intake hole; 514. Air intake pipe; 515. Air collection ring; 516. Sealing ring; 517. Connecting air pipe; 518. Driven wheel; 519. Drive belt; 520. Rotary roller; 521. Conveyor belt; 522. Fitting hole; 523. Air intake box; 524. Adsorption hole; 525. Connecting hole; 526. Dust collection box; 527. Baffle; 528. Shielding electric actuator; 529. Dust collection pipe; 530. Nozzle; 531. Converting air pump; 532. Main air pipe; 533. Dust collection box; 534. Connecting port; 535. Isolation net; 536. Dust collection port; and 537. Collection box;

[0051] A traction motor 501 is installed at one corner of the top of the processing table 1. A rotating frame 503 is rotatably installed at one end of the top of the processing table 1. One end of the two rotating frames 503 is connected to a drive wheel 502. A traction cylinder 504 is connected between the rotating frames 503. The input end of the traction motor 501 is electrically connected to the output end of an external power supply. The traction motor 501 can drive the traction cylinder 504 and the drive wheel 502 to rotate. The traction cylinder 504 plays a traction role, driving the softened material into the space between the upper mold base 3 and the lower mold base 4. Fitting holes 505 are evenly opened on the outer side of the traction cylinder 504.

[0052] A support frame 506 is welded in the middle inside the traction cylinder 504. Mounting slots 507 are movably installed at both ends inside the traction cylinder 504. A double-acting screw 508 is rotatably installed inside the support frame 506. The two ends of the double-acting screw 508 are connected to the mounting slots 507 by threads. Moving openings 509 are evenly opened at both ends of the traction cylinder 504. Clamping pieces 510 are installed inside the moving openings 509. The clamping pieces 510 are installed inside the adjacent mounting slots 507. A fixing clip 511 is welded to the bottom of the clamping pieces 510. The fixing clip 511 is embedded inside the adjacent mounting slots 507. The fixing clip 511 allows the clamping pieces 510 to be flexibly installed and removed, which is convenient for daily inspection and maintenance.

[0053] The bidirectional lead screw 508 is controlled to rotate. Under the connection of the thread and the limiting effect of the moving port 509, the clamping pieces 510 inside the mounting grooves 507 at both ends can be driven to move along the moving port 509. By using the clamping pieces 510, the position of materials of different widths can be restricted and fixed.

[0054] The inner wall of the traction cylinder 504 is uniformly equipped with air collection boxes 512. The outer side of the air collection box 512 is uniformly provided with air suction holes 513. An air suction pipe 514 is installed at one corner of the top of the processing table 1. One end of the air suction pipe 514 is connected to an air collection ring 515. The air suction pipe 514 passes through the interior of the adjacent drive wheel 502 and is connected to the air collection ring 515. A sealing ring 516 is rotatably installed on one side of the air collection ring 515. The sealing ring 516 and one end of the adjacent air collection box 512 are both connected to a connecting air pipe 517.

[0055] The fitting hole 505 and the adjacent suction hole 513 are positioned to correspond to each other. The opening end of the suction pipe 514 is connected to the suction end of the external suction pump. When the external air pump is running, the air in the air collection box 512 is drawn away under the communication between the air collection ring 515 and the connecting air pipe 517. Under the action of pressure difference, the external air enters the air collection box 512 from the fitting hole 505 and the suction hole 513, so that the softened material is tightly attached to the top of the traction cylinder 504, preventing the material from slipping on the traction cylinder 504.

[0056] Driven wheels 518 are rotatably mounted on both sides of the top of the processing table 1. A drive belt 519 is wrapped between the drive wheel 502 and the adjacent driven wheel 518. Rotary rollers 520 are rotatably mounted on both sides of the top of the processing table 1. A conveyor belt 521 is wrapped around the outside of the two rollers 520 located on the same side. The top surface of the conveyor belt 521 is higher than the top surface of the lower mold base 4. The top surface of the conveyor belt 521 is slightly higher than the top surface of the lower mold base 4, so that the two sides of the material conveyed to the top of the lower mold base 4 can fit more closely with the conveyor belt 521.

[0057] The outer side of the conveyor belt 521 is evenly provided with fitting holes 522. A suction box 523 is installed between two rollers 520 on the same side. The top of the suction box 523 is evenly provided with adsorption holes 524. A conversion air pump 531 is installed on both sides of the bottom of the processing table 1. The output end of the conversion air pump 531 is connected to the middle of one side of the adjacent suction box 523 by a main air pipe 532. The input end of the conversion air pump 531 is electrically connected to the output end of an external power supply.

[0058] The operation of the conversion air pump 531 can draw away the original air inside the air suction box 523 and replenish it through the adsorption hole 524 under atmospheric pressure. The surface of the conveyor belt 521 is provided with a contact hole 522. The air drawn in by the adsorption hole 524 flows through the contact hole 522, so that the conveyor belt 521 has an air suction function. When there is material on the surface of the conveyor belt 521, the material can be tightly attached to the conveyor belt 521 to prevent the material from slipping during the conveying process and affecting the subsequent molding of the plastic lunch box.

[0059] Dust collection boxes 526 are installed at both ends of one side of the suction box 523. A connecting hole 525 is provided at the joint between the dust collection box 526 and the suction box 523. A baffle 527 is slidably installed inside the dust collection box 526. The contact surface between the baffle 527 and the dust collection box 526 is tightly fitted to prevent air from overflowing from the two joints between the baffle 527 and the dust collection box 526, thus improving air tightness. A shielding electric actuator 528 is installed on both sides of the top of the processing table 1. The output end of the shielding electric actuator 528 is connected to the middle of the bottom of the adjacent baffle 527. The input end of the shielding electric actuator 528 is electrically connected to the output end of the external power supply. Dust collection pipes 529 are evenly connected to one side of the dust collection box 526. A nozzle 530 is connected to the top of the dust collection pipe 529.

[0060] The shielding electric actuator 528 can drive the baffle 527 to move up and down. The up and down movement of the baffle 527 can control whether the air suction box 523 is connected to the dust removal box 526. When there is dust and debris on the top surface of the lower mold base 4, the switching air pump 531 on one side of the dust removal pipe 529 is controlled to run, so that the air suction of the switching air pump 531 becomes air filling. The filled air flows through the main air pipe 532, the air suction box 523, the connecting hole 525 and the dust removal box 526 in sequence and enters the dust removal pipe 529. Finally, it is sprayed out from the nozzle 530. The nozzle 530 is horn-shaped, so that the sprayed air has a wider range of action and prevents the generation of cleaning dead corners.

[0061] On the other side of the dust collection box 526, dust collection boxes 533 are installed at both ends. A connecting port 534 is provided between the dust collection box 533 and the dust collection box 526. An isolation net 535 is installed inside the connecting port 534 on the dust collection box 533. The isolation net 535 can prevent the sucked-in dust and debris from entering the dust collection box 526. A dust suction port 536 is provided on the top of the dust collection box 533. A collection box 537 is slidably installed on the bottom of the dust collection box 533.

[0062] When the switching air pump 531 on one side of the dust removal pipe 529 changes from suction to inflation, the shielding electric push rod 528 on one side of the dust collection box 533 drives the baffle 527 to descend, and the dust removal box 526 is connected to the dust collection box 533. The switching air pump 531 on this side is in suction mode, allowing external air to enter the dust collection box 533 from the suction port 536. Combined with the air sprayed from the nozzle 530 to clean the surface of the lower mold base 4, the dust and impurities on the surface of the lower mold base 4 enter the dust collection box 533. Finally, the sucked-in dust and impurities fall into the collection box 537 at the bottom under the action of gravity, completing the collection.

[0063] The top of the processing table 1 is equipped with a cooling demolding assembly 6, which includes a cooling water tank 601, a water supply hose 602, a water inlet pipe 603, a distribution box 604, a distribution pipe 605, a sealing box 606, an impeller 607, a water passage hole 608, a rotating shaft 609, a cam 610, a heat conduction plate 611, a water outlet box 612, a water outlet pipe 613, a steam tank 614, an electric valve 615, a steam pipe 616, a branch pipe 617, a branch hole 618, a side spray hole 619, a side spray pipe 620, and a steam distribution pipe 621.

[0064] A cooling water tank 601 is installed at the bottom of the processing table 1. A water inlet pipe 603 is connected to the top of one side of the cooling water tank 601. A distribution box 604 is installed on one side of the upper mold base 3. A water supply hose 602 is connected between the bottom of one side of the cooling water tank 601 and one end of the distribution box 604. Distribution pipes 605 are evenly installed inside the upper mold base 3. A water outlet box 612 is installed on the other side of the upper mold base 3. One end of the distribution pipe 605 passes through one side of the upper mold base 3 and connects to one side of the distribution box 604. The other end of the distribution pipe 605 passes through the other side of the upper mold base 3 and connects to one side of the water outlet box 612. A water outlet pipe 613 is connected to the middle of the bottom of the water outlet box 612.

[0065] After the upper mold base 3 and the lower mold base 4 are connected, the softened material is shaped. The cold water in the cooling water tank 601 enters the inside of the diversion pipe 605 through the water supply hose 602 and the diversion box 604. The diversion pipe 605 cools the upper mold base 3, so that the molded material hardens quickly. The cooling water after cooling the upper mold base 3 flows into the water outlet box 612 and finally flows out through the water outlet pipe 613. The water outlet pipe 613 is connected to the external cooling tower to complete the water recycling.

[0066] A sealing box 606 is evenly installed in the middle of the diversion pipe 605. An impeller 607 is rotatably installed in the middle of the sealing box 606. A water passage hole 608 is opened on the outside of the impeller 607. A rotating shaft 609 is connected to both ends of the rotating shaft of the impeller 607. A cam 610 is installed on the outside of the rotating shaft 609. A heat-conducting plate 611 is sleeved on the outside of the diversion pipe 605 and the rotating shaft 609. The two sides of the heat-conducting plate 611 are in contact with the inside of the upper mold base 3.

[0067] A steam tank 614 is installed on the top of the water outlet box 612. Electric valves 615 are evenly installed on one side of the steam tank 614. A steam pipe 616 is installed on the top of the inner side of the upper mold base 3. The open end of the steam pipe 616 passes through one side of the upper mold base 3 and is connected to the adjacent electric valve 615. Branch pipes 617 are evenly connected to the bottom of the steam pipe 616. A branch hole 618 is opened at the bottom of the branch pipe 617 at the bottom of the upper mold base 3. The open end of the bottom of the branch pipe 617 is connected to the adjacent branch hole 618.

[0068] During cooling, some of the cooling water evaporates into water vapor under high temperature. The water vapor rises and enters the steam tank 614, then enters the steam pipe 616, and finally sprays out from the branch pipe 617. The branch pipe 617 is connected to the branch hole 618, and the steam is finally sprayed out from the branch hole 618. The sprayed steam can exert a force on the material that is in contact with the upper mold base 3, so that the material can quickly separate from the upper mold base 3 and avoid the molded material from sticking to the upper mold base 3.

[0069] A side spray pipe 620 is installed on the inner outer ring of the upper mold base 3. A gas distribution pipe 621 is evenly connected to the bottom of the side spray pipe 620. A side spray hole 619 is opened at the bottom of the upper mold base 3 at the bottom of the gas distribution pipe 621. The bottom opening end of the gas distribution pipe 621 is connected to the adjacent side spray hole 619. The opening end of the side spray pipe 620 is connected to the air outlet end of the external air pump. The external air pump delivers gas into the side spray pipe 620. The gas distribution pipe 621 and the side spray hole 619 are finally sprayed out through the side spray hole 619. The sprayed gas can help the molded material separate from the upper mold base 3. At the same time, the sprayed gas can form an air wall to prevent external dust from entering between the upper mold base 3 and the lower mold base 4.

[0070] The working principle and usage process of this invention: When using this equipment, adjust the bidirectional lead screw 508 according to the width of the plastic sheet to be processed. Rotate the bidirectional lead screw 508, and under the connection of the thread and the limiting effect of the moving port 509, drive the clamping pieces 510 inside the mounting grooves 507 at both ends to move along the moving port 509, so that the two sides of the plastic sheet are in contact with the clamping pieces 510 on both sides. By using the clamping of the clamping pieces 510, the position of plastic sheets of different widths is fixed, preventing the softened plastic sheet from swinging back and forth on the top of the traction cylinder 504, which would affect the subsequent pressing and molding of the plastic lunch box.

[0071] The softened plastic sheet overlaps the top of the traction cylinder 504. The traction motor 501, external air pump and conversion air pump 531 are started. Under the connection of the drive wheel 502 and the rotating frame 503, the traction motor 501 drives the traction cylinder 504 to rotate. Under the traction of the traction cylinder 504, the softened plastic sheet is driven into the space between the upper mold base 3 and the lower mold base 4.

[0072] The fitting hole 505 and the adjacent suction hole 513 are positioned to correspond to each other. The opening end of the suction pipe 514 is connected to the suction end of the external suction pump. When the external air pump is running, the air in the air collection box 512 is drawn away under the communication between the air collection ring 515 and the connecting air pipe 517. Under the action of pressure difference, the external air enters the air collection box 512 from the fitting hole 505 and the suction hole 513, so that the softened material is tightly attached to the top of the traction cylinder 504, and the plastic sheet is prevented from slipping on the traction cylinder 504 during the traction process.

[0073] The traction motor 501 operates in a stepping manner. While the traction motor 501 drives the traction cylinder 504 to rotate, it also drives the drive wheel 502 to rotate synchronously. Under the connection of the drive belt 519, it drives the driven wheel 518 and the rotating roller 520 to rotate synchronously, which in turn drives the conveyor belt 521 to rotate synchronously. The top surface of the conveyor belt 521 is slightly higher than the top surface of the lower mold base 4, so that the two sides of the plastic sheet conveyed to the top of the lower mold base 4 are more closely fitted with the conveyor belt 521.

[0074] The two-sided conversion air pumps 531 draw air, at which time the baffle 527 blocks the connecting hole 525. The conversion air pump 531 draws away the original air inside the suction box 523. Under the action of atmospheric pressure, it is replenished through the adsorption hole 524. The surface of the conveyor belt 521 is provided with a contact hole 522. The air drawn in by the adsorption hole 524 flows through the contact hole 522, so that the conveyor belt 521 has an air suction function. When there is material on the surface of the conveyor belt 521, the material can be tightly attached to the conveyor belt 521 to prevent the plastic sheet from slipping during the conveying process. This avoids the plastic sheet from being mispositioned due to slipping, ensuring the cutting accuracy of the subsequent plastic lunch box, and thus ensuring the molding quality of the plastic lunch box.

[0075] When the softened plastic sheet is conveyed to the top of the lower mold base 4, the traction motor 501 stops running, the lifting cylinder 2 drives the upper mold base 3 to descend, complete the mold closing, and press the plastic sheet into shape. After pressing, the lifting cylinder 2 drives the upper mold base 3 to rise, so that the pressed product is separated from the upper mold base 3. After separation, the traction motor 501 runs again, and the conveyor belt 521 transports the processed product away to the next cooling and cutting process.

[0076] When the upper mold base 3 and the lower mold base 4 are closed, the cold water in the cooling water tank 601 enters the interior of the diversion pipe 605 through the water supply hose 602 and the diversion box 604. Under the heat conduction of the heat conduction plate 611, the diversion pipe 605 cools the upper mold base 3, so that the lunch box formed by the mold is quickly hardened, reducing the stickiness of the lunch box and preventing the pressed lunch box from sticking to the upper mold base 3.

[0077] When the cooling water passes through the inside of the diversion pipe 605, it also flows through the inside of the sealing box 606. The cooling water impacts the impeller 607, causing the impeller 607 to rotate. The rotation of the impeller 607 causes the rotating shaft 609 and the cam 610 to rotate. The rotation of the cam 610 generates a deflection force, which causes the adjacent heat-conducting plate 611 to vibrate. Under the transmission of the vibration, the upper mold base 3 vibrates, which causes the pressed lunch box to separate quickly from the upper mold base 3, improving demolding efficiency and speeding up production.

[0078] During cooling, some of the cooling water evaporates into water vapor under high temperature. The water vapor rises and enters the steam tank 614. The electric valve 615 controls the connection between the steam tank 614 and the steam pipe 616. When the upper mold base 3 separates from the lower mold base 4 for demolding, the electric valve 615 opens, and the steam inside the steam tank 614 enters the steam pipe 616. After flowing through the branch pipe 617, the steam is finally ejected from the branch hole 618. The ejected steam can exert a force on the material that is in contact with the upper mold base 3, so that the material is quickly separated from the upper mold base 3, thus preventing the molded material from sticking to the upper mold base 3.

[0079] The opening end of the side nozzle 620 is connected to the air outlet of the external air pump. The external air pump delivers gas into the side nozzle 620, which is then distributed through the air pipe 621 and the side nozzle 619. Finally, the gas is ejected through the side nozzle 619. The ejected gas can help the molded material separate from the upper mold base 3. At the same time, the ejected gas can form an air wall to prevent external dust from entering between the upper mold base 3 and the lower mold base 4.

[0080] The shielding electric actuator 528 drives the baffle 527 to move up and down. The up and down movement of the baffle 527 controls whether the air suction box 523 is connected to the dust removal box 526. When there is dust and debris on the top surface of the lower mold base 4, the switching air pump 531 on one side of the dust removal pipe 529 is controlled to run, so that the air suction of the switching air pump 531 becomes air filling. The filled air flows through the main air pipe 532, the air suction box 523, the connecting hole 525 and the dust removal box 526 in sequence and enters the interior of the dust removal pipe 529. Finally, it is sprayed out from the nozzle 530. The nozzle 530 is trumpet-shaped, so that the sprayed air has a wider range of action and prevents the generation of cleaning dead corners.

[0081] When the switching air pump 531 on one side of the dust removal pipe 529 changes from suction to inflation, the shielding electric actuator 528 on one side of the dust collection box 533 drives the baffle 527 to descend, connecting the dust removal box 526 to the dust collection box 533. The switching air pump 531 on this side is in suction mode, allowing external air to enter the dust collection box 533 through the suction port 536. Combined with the air sprayed from the nozzle 530 to clean the surface of the lower mold base 4, the dust and impurities on the surface of the lower mold base 4 enter the dust collection box 533. Finally, the sucked-in dust and impurities fall into the collection box 537 at the bottom under the action of gravity, completing the collection and preventing dust from mixing with the softened plastic sheet during the pressing and molding of the plastic lunch box, thus improving product quality.

[0082] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lunch box forming apparatus for a plastic product, comprising a processing table, characterized in that, The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The inside of the traction cylinder is evenly provided with a plurality of suction holes, the top of the processing table is provided with a suction pipe, the suction pipe is connected with a suction ring, the suction ring is rotatably connected with a sealing ring, and the sealing ring is connected with a connecting pipe. The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The top of the processing table is provided with a lifting cylinder, the output end of the lifting cylinder is connected with an upper die holder, the top of the processing table is provided with a lower die holder, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning assembly comprises a traction motor. The top and bottom of the processing table are provided with a cooling demolding assembly, and the cooling demolding assembly comprises a cooling water tank. The bottom of the processing table is provided with a cooling water tank, one side of the cooling water tank is connected with a water inlet pipe, one side of the upper die holder is provided with a shunt box, and the bottom of the cooling water tank is connected with a water inlet pipe.

2. The lunch box molding apparatus for plastic products according to claim 1, wherein The top of the processing table is provided with a lifting cylinder, the output end of which is connected with an upper die holder, the top of the processing table is provided with a lower mold base, the top of the processing table is provided with a traction cleaning assembly, and the traction cleaning component comprises a traction motor.

3. The lunch box molding apparatus for plastic products according to claim 1, wherein The input end of the traction motor is electrically connected with the output end of the external power supply, the position of the suction hole is corresponding to the position of the suction hole, and the opening end of the suction pipe is connected with the suction end of the external suction pump. The bottom of the clamping piece is welded with a fixed clamp, and the fixed clamp is embedded in the adjacent mounting groove. The conveying belt top surface is higher than the lower die base top surface, and the conversion gas pump input end is electrically connected with the external power output end.

4. The lunch box molding apparatus for plastic products according to claim 1, wherein Two ends of one side of the air suction box are provided with dust removal boxes, and a communication hole is arranged at the joint between the dust removal box and the air suction box, a baffle is slidably installed in the dust removal box, a shielding electric push rod is installed on the top of the processing table, the output end of the shielding electric push rod is connected with the middle of the bottom of the adjacent baffle, and a dust removal pipe is connected with one side of the dust removal box.

5. The lunch box molding apparatus for plastic products according to claim 4, wherein Two ends of one side of the dust removal box are provided with dust suction boxes, a communication port is arranged between the dust suction box and the dust removal box, a separation net is installed in the communication port of the dust suction box, a dust suction port is arranged on the top of the dust suction box, and a collection box is slidably installed on the bottom of the dust suction box.

6. The lunch box molding apparatus for plastic products according to claim 4, wherein The input end of the shielding electric push rod is electrically connected with the output end of the external power source, the contact surface between the baffle and the dust removal box is tightly attached, and the shape of the spray head is a horn shape.

7. The lunch box molding apparatus for plastic products according to claim 1, wherein A sealing box is uniformly installed in the middle of the shunt pipe, an impeller is rotatably installed in the middle of the sealing box, a water passage is arranged on the outer side of the impeller, and a rotating shaft is connected with both ends of the rotating center shaft of the impeller.

8. The lunch box molding apparatus for plastic products according to claim 7, wherein A side spray pipe is installed on the outer circle of the upper die base, the bottom of the side spray pipe is uniformly connected with a gas distribution pipe, a side spray hole is arranged on the bottom of the gas distribution pipe, and the open end of the gas distribution pipe is connected with the adjacent side spray hole.

9. The lunch box molding apparatus for plastic products according to claim 7, wherein The shunt pipe and the rotating shaft are sleeved with a heat conduction plate, and the heat conduction plate is attached to the inner side of the upper die base.

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