Automatic press-fitting equipment for plastic products and using method of automatic press-fitting equipment

Abstract

The invention relates to the technical field of automatic press-fitting equipment, and discloses plastic product automatic press-fitting equipment which is characterized in that a plastic base is positioned and conveyed to a station through a speed chain tray conveying line mechanism, and is moved to an automatic press-fitting mechanism through a plastic base grabbing mechanism; the automatic plate pushing machine feeding mechanism ensures that the small flange ends of the plastic pipes are output upwards, and after being separated by the plastic pipe distributing mechanism, the plastic pipes are grabbed by the plastic pipe overturning and grabbing mechanism, rotated by 180 degrees and conveyed to a press-fitting position; the press-fitting part of the plastic base and the plastic pipe is heated through the heating mechanism, so that the internal residual stress of a material is effectively relieved, molecular level fusion is promoted, and the press-fitting cracking risk is remarkably reduced; the automatic press-fitting mechanism completes press-fitting to obtain a plastic product; the plastic products are put back to the double-speed chain tray conveying line mechanism through the plastic seat grabbing mechanism; in the machining process, the material performance is optimized through heating, the production efficiency and the yield are greatly improved, and the production stability and the product quality are ensured. The invention further discloses a using method of the automatic press-fitting equipment for the plastic products.

Description

Technical Field

[0001] This invention relates to the field of automatic pressing equipment technology, and in particular to an automatic pressing equipment for plastic products and its usage method. Background Technology

[0002] Plastic products are widely used in daily life and industrial production due to their lightweight, low cost, and ease of processing. However, significant technical challenges exist in the assembly or pressing of plastic products. Plastic materials are generally brittle and prone to cracking under external forces, which not only reduces the yield rate of products but also increases production costs and wastes resources.

[0003] Furthermore, most factories still rely on manual labor to assemble plastic products. This traditional manual assembly method not only significantly increases the labor intensity of workers but also leads to poor consistency of finished products due to the uncontrollability of human operation. Specifically, assembly precision is difficult to guarantee, product performance fluctuates greatly, and thus affects overall production efficiency. Low production efficiency further limits the benefits of large-scale production, becoming a bottleneck for industry development.

[0004] The structure of a plastic product is as follows: Figure 12 As shown, its structure includes a plastic base 81 and a plastic tube 82 inserted into the plastic base. The plastic tube 82 has a small flange end for pressing into the plastic base 81, and the outer diameter of the small flange end is larger than the diameter of the plastic tube 82. In order to improve production efficiency and yield, it is urgent to design a dedicated automatic pressing equipment for plastic products. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic pressing and filling equipment for plastic products, which can improve production efficiency and yield.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic pressing and fitting equipment for plastic products, including a double-speed chain pallet conveyor mechanism, an automatic feeding mechanism for a pusher plate machine, a plastic tube dispensing mechanism located at the discharge end of the automatic feeding mechanism for the pusher plate machine, a plastic base gripping mechanism, a plastic tube flipping gripping mechanism, a heating mechanism, and an automatic pressing and fitting mechanism. The double-speed chain pallet conveyor mechanism is used for conveying plastic bases and pressed plastic products; The automatic feeding mechanism of the pusher is used for automatic feeding of plastic tubes and ensures that the small flange end of the plastic tube is at the upper end during output. The plastic tube sorting mechanism is used to individually sort the plastic tubes at the end of the automatic feeding mechanism of the pusher machine; The plastic base gripping mechanism is used to grip the plastic base on the positioning pallet fixture of the double-speed chain pallet conveyor mechanism and put it into the automatic pressing mechanism, and then grip the pressed plastic product onto the positioning pallet fixture of the double-speed chain pallet conveyor mechanism. The plastic tube flipping and gripping mechanism is used to grip the plastic tubes after they have been divided by the plastic tube dispensing mechanism, and flips the plastic tubes 180 degrees before placing them at the automatic pressing mechanism. The heating mechanism is used to heat the pressing points of the plastic base and plastic tube to prevent cracking during the pressing process; The automatic pressing mechanism is used to press plastic bases and plastic tubes to obtain plastic products.

[0007] By adopting the above technical solution, the plastic base is positioned on the positioning pallet fixture of the double-speed chain pallet conveyor mechanism and then transported to the workstation by the double-speed chain pallet conveyor mechanism; the plastic base gripping mechanism grips the plastic base on the positioning pallet fixture and places it into the automatic pressing mechanism; the automatic feeding mechanism of the pusher plate machine enables automatic feeding of the plastic tube and ensures that the small flange end of the plastic tube is at the upper end during output; the plastic tube sorting mechanism separately sorts the plastic tubes at the end of the automatic feeding mechanism of the pusher plate machine; and the plastic tube flipping gripping mechanism is used to grip the plastic tubes fed into the plastic tube sorting mechanism. After the plastic tubes are sorted, they are rotated 180 degrees and placed at the automatic pressing mechanism. The heating mechanism heats the pressing area of ​​the plastic base and the plastic tube, relieving and eliminating residual stress inside the material and promoting molecular-level fusion (e.g., thermoplastic materials can be softened by heating) to prevent cracking during the pressing process. The automatic pressing mechanism presses the plastic base and the plastic tube to obtain the plastic product. The plastic base gripping mechanism grips the pressed plastic product onto the positioning pallet fixture of the double-speed chain pallet conveyor. Ultimately, this improves production efficiency and yield.

[0008] A further embodiment of the present invention is that the double-speed chain pallet conveyor mechanism includes a double-speed chain conveyor, a positioning pallet fixture mounted on the frame of the double-speed chain conveyor for conveying and transporting, a stopper mounted on the frame of the double-speed chain conveyor for obstructing the transport of the positioning pallet fixture, a pneumatic lifting mechanism mounted on the frame of the double-speed chain conveyor for lifting and precisely positioning the positioning pallet fixture, and a photoelectric sensor mounted on the frame of the double-speed chain conveyor for detecting whether there is a product on the positioning pallet fixture.

[0009] By adopting the above technical solution, the plastic base of the plastic product is installed on the positioning pallet fixture, and the double-speed chain conveyor transports the positioning pallet fixture to the work station; the stop device can stop the positioning pallet fixture; the through-beam photoelectric sensor is used to detect whether there is a product on the positioning pallet fixture; the pneumatic lifting mechanism lifts the positioning pallet fixture upwards to facilitate the plastic base gripping mechanism to grip it.

[0010] A further embodiment of the present invention is that the pneumatic lifting mechanism includes a first mounting base plate mounted on the frame of the double-speed chain conveyor, two guide shafts that are lifted and lowered on the first mounting base plate, a movable top plate mounted on the upper ends of the two guide shafts, and a lifting cylinder mounted on the first mounting base plate with the piston rod end connected to the movable top plate. The upper surface of the movable top plate is provided with a plurality of support columns for supporting the bottom of the positioning pallet fixture, and the upper surface of the movable top plate is provided with a plurality of positioning pins for precise positioning of the positioning pallet fixture.

[0011] By adopting the above technical solution, when the piston rod of the lifting cylinder extends, it drives the movable top plate to move upward. The support column on the movable top plate is used to support the bottom of the positioning pallet fixture, and the positioning pin is used to accurately position the positioning pallet fixture, thereby performing top precision positioning on the positioning pallet fixture that is transported to the work position.

[0012] A further configuration of the present invention is as follows: the automatic feeding mechanism of the pusher includes a device frame, a stepped pusher feeding machine with a hopper mounted on the device frame, and a linear vibrating feeder; the linear vibrating feeder includes a linear vibrator, a first feeding track with a slot mounted on the linear vibrator, and a second feeding track connected to the first feeding track and used to receive plastic tubes from the stepped pusher feeding machine; the second feeding track extends downward at an incline toward the first feeding track, and a discharge plate is provided on one side of the second feeding track to allow the inclined plastic tubes to slide back into the hopper inside the stepped pusher feeding machine; the diameter of the plastic tube is smaller than the width of the slot of the first feeding track, and the outer diameter of the small flange of the plastic tube is larger than the width of the slot of the first feeding track; when the plastic tube moves to the first feeding track, the tubular portion of the plastic tube falls into the slot and rotates 90 degrees so that the small flange end of the plastic tube is at the upper end.

[0013] By adopting the above technical solution, the plastic tube is placed in the hopper of the stepped pusher feeder. The stepped pusher feeder can lift the plastic tube horizontally upward and transport it to the second feeding track of the linear vibrating feeder. After vibrating and sliding down the second feeding track, the plastic tube enters the first feeding track. Because the diameter of the plastic tube is smaller than the width of the slot of the first feeding track, and the outer diameter of the small flange of the plastic tube is larger than the width of the slot of the first feeding track, when the plastic tube moves to the first feeding track, the tubular part of the plastic tube falls into the slot and rotates 90 degrees so that the small flange end of the plastic tube is at the top. At the same time, some plastic tubes in an inclined state can slide down along the feed plate into the stepped pusher feeder.

[0014] A further configuration of the present invention is as follows: the plastic tube dispensing mechanism includes a mounting base plate, two blocking cylinders arranged side by side on the mounting base plate, a top pressure plate arranged on the mounting base plate to prevent the plastic tube from moving up and down during the conveying process, and a material detection sensor; the plastic tube dispensing mechanism is located near the discharge end of the first feeding track, and the blocking cylinder away from the first feeding track is used to prevent the previous plastic tube from falling when it is extended, and the blocking cylinder near the first feeding track is used to block the movement of the next plastic tube after it is extended; the material detection sensor is used to detect whether there is a plastic tube in the area between the two blocking cylinders.

[0015] By adopting the above technical solution, when the plastic tube reaches the discharge end of the first feeding track, the first blocking cylinder extends to block the plastic tube to prevent it from falling. At this time, the second blocking cylinder is in a retracted state. After the material detection sensor detects that the plastic tube is in place, the second blocking cylinder extends and the second plastic tube blocks it, preventing the second plastic tube from continuing to move forward. The plastic tube flipping and gripping mechanism then grabs the first plastic tube (the first blocking cylinder needs to retract after grabbing the plastic tube). When the material detection sensor detects that there is no product, the previous action is repeated. At the same time, the top pressure plate is set to prevent the plastic tube from moving up and down during the vibration feeding process, ensuring that the plastic tube is in a relatively fixed state, which facilitates the plastic tube flipping and gripping mechanism to grab it.

[0016] A further configuration of the present invention is as follows: the plastic base gripping mechanism includes a fixed plate, a first transverse guide rail cylinder disposed on the fixed plate, a first lifting guide rail cylinder disposed on the first transverse guide rail cylinder, a first gripper cylinder disposed on the first lifting guide rail cylinder, and two sets of first contour grippers disposed on the first gripper cylinder.

[0017] By adopting the above technical solution, the first gripper cylinder can drive the two first contour grippers to close or open. After the two sets of first contour grippers grab the plastic seat, the first transverse guide cylinder can drive the two sets of first contour grippers to move horizontally, and the first lifting guide cylinder can drive the two sets of first contour grippers to move up and down, so as to clamp the plastic seat on the positioning pallet fixture to the automatic pressing mechanism, and to grab the plastic product pressed by the automatic pressing mechanism onto the positioning pallet fixture.

[0018] A further configuration of the present invention is as follows: the plastic tube flipping mechanism includes a fixed upright plate, a second transverse guide rail cylinder disposed on the fixed upright plate, a second lifting guide rail cylinder disposed on the second transverse guide rail cylinder, a 180° flipping swing cylinder disposed on the second lifting guide rail cylinder, a second gripper cylinder disposed on the 180° flipping swing cylinder, and two sets of second contour grippers disposed on the second gripper cylinder.

[0019] By adopting the above technical solution, the second gripper cylinder can drive the two second contour grippers to close or unfold. After the two second contour grippers hold the plastic tube, the plastic tube can be rotated 180 degrees by the 80° flipping swing cylinder. The two sets of second contour grippers can be moved horizontally by the second transverse guide rail cylinder, and the two sets of second square grippers can be moved by the second lifting guide rail cylinder, so as to grab the plastic tube to the automatic pressing mechanism.

[0020] A further configuration of the present invention is as follows: the heating mechanism includes a fixing block, a guide rod cylinder mounted on the fixing block, and an industrial temperature-controlled heating fan mounted on the piston rod of the guide rod cylinder, wherein the industrial temperature-controlled heating fan is driven by the guide rod cylinder to adjust the distance between itself and the plastic product.

[0021] By adopting the above technical solution, the guide rod cylinder can adjust the distance between the industrial temperature-controlled heating fan and the plastic product to heat the plastic base and the plastic tube pressing part, which can effectively prevent cracking. Its core principle is to alleviate and eliminate the residual stress inside the material and promote the fusion at the molecular level, as follows: (1) Reduce residual stress: After the plastic product is molded (such as injection molding, extrusion), there will be residual internal stress inside due to uneven cooling rate, molecular chain orientation and other reasons; during the pressing process, the external mechanical force will be superimposed with these residual stresses. When the total stress exceeds When the material strength limit is reached, cracking will occur; heating can intensify the thermal motion of plastic molecular chains and weaken the intermolecular forces, thereby allowing the oriented molecular chains to rearrange and relax, effectively releasing or reducing internal stress, and avoiding cracking due to stress concentration during pressing; (2) Promote thermoplastic fusion: if the plastic products (plastic base and plastic tube) are both thermoplastic materials (such as polyethylene PE, polypropylene PP), heating can soften or even slightly melt the plastic on the contact surface; under pressure, the molten plastic molecules diffuse and entangle with each other, and form a strong molecular-level connection after cooling. This "thermal welding" effect not only enhances the bonding strength, but also avoids stress concentration points caused by poor interface bonding, thereby preventing cracking; (3) Improve material toughness: For some plastics that are prone to stress cracking (such as polycarbonate and polyamide), they are very easy to crack under low temperature pressing; appropriate heating can improve the toughness of the material, making it change from a brittle state to a more ductile state, and be able to withstand the deformation during the pressing process without cracking; (4) Match thermal expansion coefficient: If the pressing involves plastic parts with different thermal expansion coefficients, heating can make each part expand synchronously, reducing the interface stress caused by temperature difference.

[0022] A further embodiment of the present invention is that the automatic pressing mechanism includes a second mounting base plate, two columns disposed on the second mounting base plate, a top plate disposed between the upper ends of the two columns, a positioning fixture disposed on the second mounting base plate for positioning the plastic base, a pressing cylinder disposed on the top plate, a pressing fixture disposed on the piston rod of the pressing cylinder, a quick exhaust valve disposed on the top plate for quickly venting the pressing cylinder during the pressing process, and a pressure reducing valve disposed on the top plate for adjusting the pressure of the pressing cylinder.

[0023] By adopting the above technical solution, the plastic base is placed on the positioning fixture, and the plastic tube is aligned with the plastic base under the gripping of the plastic tube flipping and gripping mechanism. After the plastic base and plastic tube are heated by the heating mechanism at the pressing point, when the plastic tube flipping and gripping mechanism is slightly loosened, the pressing cylinder drives the pressing fixture to apply downward pressure to the plastic tube, thereby completing the pressing of the plastic base and plastic tube.

[0024] The present invention also aims to provide a method for using an automatic pressing equipment for plastic products, which can improve production efficiency and yield.

[0025] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a method of using an automatic pressing and filling equipment for plastic products, comprising the following steps: (S1) The plastic base is positioned on the positioning pallet fixture of the double speed chain pallet conveyor mechanism and then transported to the workstation by the double speed chain pallet conveyor mechanism. (S2) The plastic base gripping mechanism grips the plastic base on the positioning pallet fixture of the double-speed chain pallet conveyor mechanism and puts it into the automatic pressing mechanism; (S3) The automatic feeding mechanism of the pusher plate machine enables the automatic feeding of plastic tubes and ensures that the small flange end of the plastic tube is at the upper end during output; (S4) The plastic tube sorting mechanism sorts the plastic tubes at the end of the automatic feeding mechanism of the pusher machine separately; (S5) The plastic tube flipping and gripping mechanism is used to grip the plastic tubes after they have been divided by the plastic tube dispensing mechanism, and flips the plastic tubes 180 degrees before placing them into the automatic pressing mechanism. (S6) The heating mechanism heats the plastic base and the pressing area of ​​the plastic tube to prevent cracking during the pressing process; (S7) The automatic pressing mechanism presses the plastic base and plastic tube to obtain plastic products; (S8) The plastic base gripping mechanism grips the pressed plastic product onto the unloaded positioning pallet fixture of the double-speed chain pallet conveyor mechanism.

[0026] The beneficial effects of this invention are as follows: the plastic base is positioned and conveyed to the workstation by the double-speed chain pallet conveyor mechanism, and then moved to the automatic pressing mechanism by the plastic base gripping mechanism; the automatic feeding mechanism of the pusher ensures that the small flange end of the plastic tube is output facing upwards, and after being separated by the plastic tube separating mechanism, it is gripped by the plastic tube flipping gripping mechanism and rotated 180 degrees to be sent to the pressing position; the pressing part of the plastic base and the plastic tube is heated by the heating mechanism, which effectively relieves the residual stress inside the material, promotes molecular-level fusion, and significantly reduces the risk of pressing cracks; the automatic pressing mechanism completes the pressing to obtain the plastic product; the plastic product is then returned to the double-speed chain pallet conveyor mechanism by the plastic base gripping mechanism; this processing process optimizes the material properties through heating, greatly improves production efficiency and yield, and ensures production stability and product quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the main structure of the automatic pressing equipment for plastic products provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of key components of the automatic pressing equipment for plastic products provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the double-speed chain conveyor mechanism provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the pneumatic lifting mechanism of the double-speed chain conveyor provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the automatic feeding mechanism of the pusher machine provided in Embodiment 1 of the present invention; Figure 6 This is a partial schematic diagram of the automatic feeding mechanism of the pusher machine provided in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the plastic tube dispensing mechanism provided in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the plastic base gripping mechanism provided in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the plastic tube flipping and gripping mechanism provided in Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the heating mechanism provided in Embodiment 1 of the present invention; Figure 11 This is a schematic diagram of the automatic pressing mechanism provided in Embodiment 1 of the present invention. Figure 12 Provide a structural schematic diagram of a plastic product in the prior art.

[0029] In the diagram: 1. Double-speed chain pallet conveyor mechanism; 11. Double-speed chain conveyor; 12. Positioning pallet fixture; 13. Stopper; 14. Pneumatic lifting mechanism; 141. First mounting base plate; 142. Guide shaft; 143. Movable top plate; 144. Lifting cylinder; 145. Support column; 146. Positioning pin; 147. Sliding bearing; 148. Movable joint; 15. Through-beam photoelectric sensor; 2. Automatic feeding mechanism for pusher plate machine; 21. Equipment frame; 22. Stepped pusher plate feeder; 23. Linear vibrating feeder; 231. Linear vibrator; 232. First feeding track; 2321. Groove; 233. Second feeding track; 2331. Unloading plate; 3. Plastic pipe distribution mechanism; 31. Mounting base plate; 32. Blocking cylinder; 33. Top pressure plate; 34. Material detection sensor 4. Sensor; 5. Plastic base gripping mechanism; 6. Fixed plate; 7. First transverse guide rail cylinder; 8. First lifting guide rail cylinder; 9. First gripper cylinder; 10. First contour gripper; 11. Plastic tube flipping gripping mechanism; 12. Fixed upright plate; 13. Second transverse guide rail cylinder; 14. Second lifting guide rail cylinder; 15. 180° flipping swing cylinder; 16. Second gripper cylinder; 17. Second contour gripper; 18. Heating mechanism; 19. Fixed block; 20. Guide rod cylinder; 21. Industrial temperature-controlled heating fan; 22. Automatic pressing mechanism; 23. Second mounting base plate; 34. Column; 45. Top plate; 66. Positioning fixture; 77. Pressing cylinder; 78. Pressing fixture; 99. Quick exhaust valve; 100. Pressure reducing valve; 11. Plastic product; 12. Plastic base; 13. Plastic tube. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1: An automatic pressing and filling equipment for plastic products, such as Figure 1 and Figure 2 As shown, it includes a double-speed chain pallet conveyor mechanism 1, a pusher automatic feeding mechanism 2, a plastic tube dispensing mechanism 3 located at the discharge end of the pusher automatic feeding mechanism 2, a plastic base gripping mechanism 4, a plastic tube flipping gripping mechanism 5, a heating mechanism 6, and an automatic pressing mechanism 7.

[0032] like Figure 1 and Figure 3As shown, the double-speed chain pallet conveyor mechanism 1 is used for conveying the plastic base 81 and the pressed plastic products 8. The double-speed chain pallet conveyor mechanism 1 includes a double-speed chain conveyor 11, a positioning pallet fixture 12 mounted on the frame of the double-speed chain conveyor 11 for conveying and transporting, a stopper 13 mounted on the frame of the double-speed chain conveyor 11 for blocking the conveying of the positioning pallet fixture 12, a pneumatic lifting mechanism 14 mounted on the frame of the double-speed chain conveyor 11 for lifting and precisely positioning the positioning pallet fixture 12, and a photoelectric sensor 15 mounted on the frame of the double-speed chain conveyor 11 for detecting whether there are products on the positioning pallet fixture 12.

[0033] like Figure 3 and Figure 4 As shown, the pneumatic lifting mechanism 14 includes a first mounting base plate 141 mounted on the frame of the double-speed chain conveyor 11, two guide shafts 142 that are lifted and lowered on the first mounting base plate 141, a movable top plate 143 mounted on the upper ends of the two guide shafts 142, and a lifting cylinder 144 mounted on the first mounting base plate 141 with its piston rod end connected to the movable top plate 143. The upper surface of the movable top plate 143 is provided with four support columns 145 for supporting the bottom of the positioning pallet fixture 12, and two positioning pins 146 for precisely positioning the positioning pallet fixture 12. Sliding bearings 147 are installed at the extension and retraction points of the first mounting base plate 141 and the guide shafts 142 for guidance. A movable joint 148 is installed between the piston rod end of the lifting cylinder 144 and the movable top plate 143 for connection.

[0034] like Figure 1 , Figure 5 and Figure 6As shown, the automatic feeding mechanism 2 of the pusher plate machine is used for automatic feeding of plastic tubes 82 and ensures that the small flange end of the plastic tubes 82 is at the upper end during output. The automatic feeding mechanism 2 of the pusher plate machine includes an equipment frame 21, a stepped pusher plate feeder 22 mounted on the equipment frame 21 and having a hopper (not shown in the figure), and a linear vibrating feeder 23. The linear vibrating feeder 23 includes a linear vibrator 231, a first feeding track 232 mounted on the linear vibrator 231 and having a slot 2321, and a second feeding track 233 connected to the first feeding track 232 and used to receive plastic tubes 82 from the stepped pusher feeder 22. The second feeding track 233 extends downward at an incline toward the first feeding track 232. A discharge plate 2331 is provided on one side of the second feeding track 233 so that the plastic tubes 82, which are in an inclined state, slide back into the hopper of the stepped pusher feeder 22. The diameter of the plastic tubes 82 is smaller than the width of the slot 2321 of the first feeding track 232, and the outer diameter of the small flange of the plastic tubes 82 is larger than the width of the slot 2321 of the first feeding track 232. When the plastic tubes 82 move to the first feeding track 232, the tubular part of the plastic tubes 82 falls into the slot 2321 and rotates 90 degrees so that the small flange end of the plastic tubes 82 is at the upper end.

[0035] like Figure 1 , Figure 2 and Figure 7 As shown, the plastic tube sorting mechanism 3 is used to individually sort the plastic tubes 82 at the end of the automatic feeding mechanism 2 of the pusher. The plastic tube sorting mechanism 3 includes a mounting base plate 31, two blocking cylinders 32 arranged side by side on the mounting base plate 31, a top pressure plate 33 arranged on the mounting base plate 31 to prevent the plastic tubes 82 from moving up and down during the conveying process, and a material presence detection sensor 34 arranged on the mounting base plate 31. The plastic tube sorting mechanism 3 is located near the discharge end of the first feeding track 232. The blocking cylinder 32 away from the first feeding track 232 is used to prevent the previous plastic tube 82 from falling when it is extended, and the blocking cylinder 32 near the first feeding track 232 is used to block the movement of the next plastic tube 82 after it is extended. The material presence detection sensor 34 is used to detect whether there is a plastic tube 82 in the area between the two blocking cylinders 32.

[0036] like Figure 1 , Figure 2 and Figure 8As shown, the plastic base gripping mechanism 4 is used to grip the plastic base 81 on the positioning pallet fixture 12 of the double-speed chain pallet conveyor mechanism 1 and place it into the automatic pressing mechanism 7, and then grip the pressed plastic product 8 onto the positioning pallet fixture 12 of the double-speed chain pallet conveyor mechanism 1. The plastic base gripping mechanism 4 includes a fixed plate 41, a first transverse guide rail cylinder 42 disposed on the fixed plate 41, a first lifting guide rail cylinder 43 disposed on the first transverse guide rail cylinder 42, a first gripper cylinder 44 disposed on the first lifting guide rail cylinder 43, and two sets of first contour grippers 45 disposed on the first gripper cylinder 44.

[0037] like Figure 1 , Figure 2 and Figure 9 As shown, the plastic tube flipping and gripping mechanism 5 is used to grip the plastic tubes 82 after they have been divided by the plastic tube dispensing mechanism 3, and flips the plastic tubes 82 180 degrees before placing them at the automatic pressing mechanism 7. The plastic tube 82 flipping mechanism includes a fixed upright plate 51, a second transverse guide rail cylinder 52 mounted on the fixed upright plate 51, a second lifting guide rail cylinder 53 mounted on the second transverse guide rail cylinder 52, a 180° flipping swing cylinder 54 mounted on the second lifting guide rail cylinder 53, a second gripper cylinder 55 mounted on the 180° flipping swing cylinder 54, and two sets of second contour grippers 56 mounted on the second gripper cylinder 55.

[0038] like Figure 1 , Figure 2 and Figure 10 As shown, the heating mechanism 6 is used to heat the pressing area of ​​the plastic base 81 and the plastic tube 82 to prevent cracking during the pressing process. The heating mechanism 6 includes a fixing block 61, a guide rod cylinder 62 mounted on the fixing block 61, and an industrial temperature-controlled heating fan 63 mounted on the piston rod of the guide rod cylinder 62. The industrial temperature-controlled heating fan 63 is driven by the guide rod cylinder 62 to adjust the distance between itself and the plastic product 8.

[0039] like Figure 1 , Figure 2 and Figure 11 As shown, the automatic pressing mechanism 7 is used to press a plastic base 81 and a plastic tube 82 to obtain a plastic product 8. The automatic pressing mechanism 7 includes a second mounting base plate 71, two columns 72 disposed on the second mounting base plate 71, a top plate 73 disposed between the upper ends of the two columns 72, a positioning fixture 74 disposed on the second mounting base plate 71 for positioning the plastic base 81, a pressing cylinder 75 disposed on the top plate 73, a pressing fixture 76 disposed on the piston rod of the pressing cylinder 75, a quick exhaust valve 77 disposed on the top plate 73 for quickly venting the pressing cylinder 75 during the pressing process, and a pressure reducing valve 78 disposed on the top plate 73 for adjusting the pressure of the pressing cylinder 75.

[0040] Implementation Results: The plastic base 81 is positioned on the positioning pallet fixture 12 of the double-speed chain pallet conveyor mechanism 1 and then conveyed to the workstation by the double-speed chain pallet conveyor mechanism 1; the plastic base gripping mechanism 4 grips the plastic base 81 on the positioning pallet fixture 12 and places it into the automatic pressing mechanism 7; the automatic feeding mechanism 2 of the pusher plate machine enables the automatic feeding of the plastic tube 82 and ensures that the small flange end of the plastic tube 82 is at the upper end during output; the plastic tube sorting mechanism 3 separately sorts the plastic tubes 82 at the end of the automatic feeding mechanism 2 of the pusher plate machine; the plastic tube flipping gripping mechanism 5 is used to grip the plastic tube sorting mechanism 3 for sorting. The plastic tube 82, after being filled, is rotated 180 degrees and placed at the automatic pressing mechanism 7. The heating mechanism 6 heats the pressing area of ​​the plastic base 81 and the plastic tube 82 to relieve and eliminate residual stress inside the material and promote molecular-level fusion (e.g., thermoplastic materials can be softened by heating) to prevent cracking during the pressing process. The automatic pressing mechanism 7 presses the plastic base 81 and the plastic tube 82 to obtain the plastic product 8. The plastic base gripping mechanism 4 grips the pressed plastic product 8 onto the positioning pallet fixture 12 of the double-speed chain pallet conveyor mechanism 1. Ultimately, this improves production efficiency and yield.

[0041] In particular, the setting of the heating mechanism 6 can adjust the distance between the industrial temperature-controlled heating fan 63 and the plastic product 8 through the guide rod cylinder 62, so as to heat the plastic base 81 and the plastic tube 82 pressing point, which can effectively prevent cracking. Its core principle is to alleviate and eliminate the residual stress inside the material and promote the fusion at the molecular level, as follows: (1) Reduce residual stress: After the plastic product 8 is molded (such as injection molding, extrusion), there will be residual internal stress inside due to uneven cooling rate, molecular chain orientation, etc.; during the pressing process, the external mechanical force will interact with these residual stresses. When the total stress exceeds the material strength limit, it will cause cracking. Heating can intensify the thermal motion of plastic molecular chains and weaken the intermolecular forces, thereby allowing the oriented molecular chains to rearrange and relax, effectively releasing or reducing internal stress and avoiding cracking due to stress concentration during pressing. (2) Promote thermoplastic fusion: If all plastic products are thermoplastic materials (such as polyethylene PE, polypropylene PP), heating can soften or even slightly melt the plastic on the contact surface. Under pressure, the molten plastic molecules diffuse and entangle with each other, and form a strong molecular-level connection after cooling. This "thermal welding" effect not only enhances the bonding strength, but also avoids stress concentration points caused by poor interface bonding, thereby preventing cracking; (3) Improve material toughness: For some plastics that are prone to stress cracking (such as polycarbonate and polyamide), they are very easy to crack under low temperature pressing; appropriate heating can improve the toughness of the material, making it change from a brittle state to a more ductile state, and be able to withstand the deformation during the pressing process without cracking; (4) Match thermal expansion coefficient: If the pressing involves plastic parts with different thermal expansion coefficients, heating can make each part expand synchronously, reducing the interface stress caused by temperature difference.

[0042] Example 2: A method of using an automatic pressing and filling equipment for plastic products, comprising the following steps: (S1) First, the plastic base 81 is installed on the positioning pallet fixture 12 for positioning, and then transported to the work station by the double-speed chain pallet conveyor. It is stopped by the stopper 13. The photoelectric sensor 15 detects whether there is a plastic base 81 on the positioning pallet fixture 12. After the plastic base 81 is detected, the positioning pallet fixture 12 is lifted upward by the pneumatic lifting mechanism 14 and precisely positioned. (S2) The plastic base gripping mechanism 4 grips the plastic base 81 on the positioning pallet fixture 12 of the double speed chain pallet conveyor mechanism 1 and places it onto the positioning fixture 74 of the automatic pressing mechanism 7. (S3) The stepped pusher feeder 22 conveys the plastic tube 82 in its hopper to the second feeding track 233 of the linear vibrating feeder 23. During the vibration, the plastic tube 82 slides along the second feeding track 233 to the first feeding track 232. When the plastic tube 82 moves to the first feeding track 232, the tubular part of the plastic tube 82 falls into the slot 2321 and rotates 90 degrees so that the small flange end of the plastic tube 82 is at the upper end. (S4) The plastic tube feeding mechanism 3 separately feeds the plastic tubes 82 at the end of the automatic feeding mechanism 2 of the pusher machine; (S5) The plastic tube flipping and gripping mechanism 5 is used to grip the plastic tube 82 after it has been divided by the plastic tube dispensing mechanism 3, and flips the plastic tube 82 180 degrees and places it into the automatic pressing mechanism 7. (S6) The industrial temperature-controlled heating fan 63 of the heating mechanism 6 approaches the automatic pressing mechanism 7 under the drive of the guide rod cylinder 62 to press the plastic base 81 and plastic tube 82 to prevent cracking during the pressing process. (S7) The automatic pressing mechanism 7 presses the plastic base 81 and the plastic tube 82 to obtain the plastic product 8; (S8) The plastic base gripping mechanism 4 grips the pressed plastic product 8 onto the unloaded positioning pallet fixture 12 of the double speed chain pallet conveyor mechanism 1.

Claims

1. An automatic pressing and filling equipment for plastic products, characterized in that: It includes a double-speed chain pallet conveyor mechanism (1), a pusher automatic feeding mechanism (2), a plastic tube distribution mechanism (3) located at the discharge end of the pusher automatic feeding mechanism (2), a plastic base gripping mechanism (4), a plastic tube flipping gripping mechanism (5), a heating mechanism (6), and an automatic pressing mechanism (7). The double-speed chain pallet conveyor mechanism (1) is used for conveying the plastic base (81) and the pressed plastic products (8); The automatic feeding mechanism (2) of the pusher is used for automatic feeding of plastic tubes (82) and makes the small flange end of the plastic tubes (82) at the upper end when output; The plastic tube sorting mechanism (3) is used to separately sort the plastic tubes (82) at the end of the automatic feeding mechanism (2) of the pusher machine; The plastic base gripping mechanism (4) is used to grip the plastic base (81) on the positioning pallet fixture (12) of the double speed chain pallet conveyor mechanism (1) into the automatic pressing mechanism (7), and then grip the pressed plastic product (8) into the positioning pallet fixture (12) of the double speed chain pallet conveyor mechanism (1). The plastic tube flipping and gripping mechanism (5) is used to grip the plastic tube (82) after it has been divided by the plastic tube dispensing mechanism (3), and flip the plastic tube (82) 180 degrees and place it at the automatic pressing mechanism (7); The heating mechanism (6) is used to heat the pressing points of the plastic base (81) and the plastic tube (82) to prevent cracking during the pressing process; The automatic pressing mechanism (7) is used to press the plastic base (81) and plastic tube (82) to obtain plastic products (8).

2. The automatic pressing equipment for plastic products according to claim 1, characterized in that: The double-speed chain pallet conveyor mechanism (1) includes a double-speed chain conveyor (11), a positioning pallet fixture (12) mounted on the frame of the double-speed chain conveyor (11) for conveying and transporting, a stopper (13) mounted on the frame of the double-speed chain conveyor (11) for blocking the conveying of the positioning pallet fixture (12), a pneumatic lifting mechanism (14) mounted on the frame of the double-speed chain conveyor (11) for lifting and precisely positioning the positioning pallet fixture (12), and a photoelectric sensor (15) mounted on the frame of the double-speed chain conveyor (11) for detecting whether there is a product on the positioning pallet fixture (12).

3. The automatic pressing equipment for plastic products according to claim 2, characterized in that: The pneumatic lifting mechanism (14) includes a first mounting base plate (141) mounted on the frame of the double-speed chain conveyor (11), two guide shafts (142) that are lifted and lowered on the first mounting base plate (141), a movable top plate (143) mounted on the upper end of the two guide shafts (142), and a lifting cylinder (144) mounted on the first mounting base plate (141) with the piston rod end connected to the movable top plate (143). The upper surface of the movable top plate (143) is provided with a plurality of support columns (145) for supporting the bottom of the positioning pallet fixture (12), and the upper surface of the movable top plate (143) is provided with a plurality of positioning pins (146) for precisely positioning the positioning pallet fixture (12).

4. The automatic pressing equipment for plastic products according to claim 1, characterized in that: The automatic feeding mechanism (2) of the pusher includes a frame (21), a stepped pusher feeding machine (22) set on the frame (21) and having a hopper, and a linear vibrating feeder (23). The linear vibrating feeder (23) includes a linear vibrator (231), a first feeding track (231) disposed on the linear vibrator (231) and having a slot (2321), and a second feeding track (233) connected to the first feeding track (231) and used to receive plastic tubes (82) from a stepped pusher feeder (22). The second feeding track (233) extends downward at an incline toward the first feeding track (231), and a plastic tube is provided on one side of the second feeding track (233) to be in an oblique state. (82) The material plate (2331) slides back into the hopper of the stepped pusher feeder (22); the diameter of the plastic tube (82) is smaller than the width of the groove (2321) of the first feeding track (231), and the outer diameter of the small flange of the plastic tube (82) is larger than the width of the groove (2321) of the first feeding track (231). When the plastic tube (82) moves to the first feeding track (231), the tubular part of the plastic tube (82) falls into the groove (2321) and rotates 90 degrees so that the small flange end of the plastic tube (82) is at the upper end.

5. The automatic pressing equipment for plastic products according to claim 4, characterized in that: The plastic tube dispensing mechanism (3) includes a mounting base plate (31), two blocking cylinders (32) arranged side by side on the mounting base plate (31), a top pressure plate (33) arranged on the mounting base plate (31) to prevent the plastic tube (82) from moving up and down during the conveying process, and a material detection sensor (34). The plastic tube dispensing mechanism (3) is located near the discharge end of the first feeding track (231). The blocking cylinder (32) away from the first feeding track (231) is used to prevent the previous plastic tube (82) from falling when it is extended. The blocking cylinder (32) near the first feeding track (231) is used to block the movement of the next plastic tube (82) after it is extended. The material detection sensor (34) is used to detect whether there is a plastic tube (82) in the area between the two blocking cylinders (32).

6. The automatic pressing equipment for plastic products according to claim 1, characterized in that: The plastic base gripping mechanism (4) includes a fixed plate (41), a first transverse guide rail cylinder (42) mounted on the fixed plate (41), a first lifting guide rail cylinder (43) mounted on the first transverse guide rail cylinder (42), a first gripper cylinder (44) mounted on the first lifting guide rail cylinder (43), and two sets of first contour grippers (45) mounted on the first gripper cylinder (44).

7. The automatic pressing equipment for plastic products according to claim 1, characterized in that: The plastic tube (82) flipping mechanism includes a fixed plate (51), a second transverse guide cylinder (52) set on the fixed plate (51), a second lifting guide cylinder (53) set on the second transverse guide cylinder (52), a 180° flipping swing cylinder (54) set on the second lifting guide cylinder (53), a second gripper cylinder (55) set on the 180° flipping swing cylinder (54), and two sets of second contour grippers (56) set on the second gripper cylinder (55).

8. The automatic pressing equipment for plastic products according to claim 1, characterized in that: The heating mechanism (6) includes a fixed block (61), a guide rod cylinder (62) mounted on the fixed block (61), and an industrial temperature-controlled heating fan (63) mounted on the piston rod of the guide rod cylinder (62). The industrial temperature-controlled heating fan (63) is driven by the guide rod cylinder (62) to adjust the distance between itself and the plastic product (8).

9. The automatic pressing equipment for plastic products according to claim 8, characterized in that: The automatic pressing mechanism (7) includes a second mounting base plate (71), two columns (72) set on the second mounting base plate (71), a top plate (73) set between the upper ends of the two columns (72), a positioning fixture (74) set on the second mounting base plate (71) and used to position the plastic base (81), a pressing cylinder (75) set on the top plate (73), a pressing fixture (76) set on the piston rod of the pressing cylinder (75), a quick exhaust valve (77) set on the top plate (73) and used to quickly exhaust air during the pressing process of the pressing cylinder (75), and a pressure reducing valve (78) set on the top plate (73) and used to adjust the pressure of the pressing cylinder (75).

10. A method of using an automatic pressing device for plastic products (8) according to any one of claims 1 to 9, characterized in that: Includes the following steps: (S1) The plastic base (81) is positioned on the positioning pallet fixture (12) of the double speed chain pallet conveyor mechanism (1) and then conveyed to the work station by the double speed chain pallet conveyor mechanism (1); (S2) The plastic base gripping mechanism (4) grips the plastic base (81) on the positioning pallet fixture (12) of the double speed chain pallet conveyor mechanism (1) into the automatic pressing mechanism (7); (S3) The automatic feeding mechanism (2) of the pusher plate machine enables the automatic feeding of the plastic tube (82) and makes the small flange end of the plastic tube (82) at the upper end during output; (S4) The plastic tube sorting mechanism (3) sorts the plastic tubes (82) at the end of the automatic feeding mechanism (2) of the pusher machine separately; (S5) The plastic tube flipping and gripping mechanism (5) is used to grip the plastic tube (82) after it has been divided by the plastic tube dispensing mechanism (3), and flip the plastic tube (82) 180 degrees and place it into the automatic pressing mechanism (7); (S6) Heating mechanism (6) heats the pressing points of plastic base (81) and plastic tube (82) to prevent cracking during pressing; (S7) Automatic pressing mechanism (7) presses in plastic base (81) and plastic tube (82) to obtain plastic product (8); (S8) The plastic base gripping mechanism (4) grips the pressed plastic product (8) onto the unloaded positioning pallet fixture (12) of the double speed chain pallet conveyor mechanism (1).

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