Automatic conveying device for single sheet thermoforming processing

Abstract

An automatic conveying device for thermoforming of single sheets. The present invention is intended to solve the problems of poor positioning accuracy of sheets after heating and entering molding in the prior art, and the limitation of processing efficiency improvement due to the flow line operation of a single heating station. Technical highlights: It includes a frame and a material receiving station, a heating station, and a molding station thereon. The heating station consists of a first heating station and a second heating station and is located on the left and right sides of the material receiving station. The molding station is located in front of or behind the material receiving station. The first heating station has a first slide rail, a first electric linear guide drive module, and a first material receiving tray. The second heating station has a second slide rail, a second electric linear guide drive module, and a second material receiving tray. The molding station has a third electric linear guide drive module, a third slide rail, and a transverse slide. The transverse slide is fixed on the third electric linear guide drive module and slidably mounted on the third slide rail. An electric sheet clamp is provided on one side of the transverse slide, and a molded product pusher is provided on the other side.

Description

Technical Field

[0001] The present invention relates to a thermoplastic sheet forming device, in particular to an automatic conveying device for thermoforming a single sheet, which is suitable for thermoforming a larger single sheet. Background Art

[0002] Existing thermoplastic sheet forming equipment can be divided into single sheet forming equipment and roll sheet forming equipment. Single sheet forming equipment similar to the present invention can be further divided into semi-automatic and automatic types. Semi-automatic types use separate heaters and forming machines. Sheets are manually loaded and removed from the heater and forming machine, which is labor-intensive and inefficient. The automatic method is to heat and form different stations of the same equipment. The sheet enters the heating and forming station and is automatically transported by a conveyor belt or chain conveyor mechanism and then dropped or slid into the forming station. This can reduce labor intensity and improve work efficiency. However, dropping or sliding the sheet into the forming station often causes poor positioning accuracy of the sheet at the forming station. Inaccurate positioning will result in low yield. If a robot plus suction cup is used to pick up and place the sheet, the sheet area must be increased to leave space for the suction cup, which will result in a relatively wasteful material. Another problem is that the heating time of the heating station is longer, while the forming time of the forming process is shorter. The assembly line operation of a single heating station will affect the further improvement of the forming processing efficiency of the automatic method.

[0003] The Chinese patent No. CN205800153U previously applied by the present applicant discloses an automatic heating and feeding device for lampshade forming equipment, the structural features of which include a frame, a front heater, a rear heater, a sheet sucking manipulator and a conveyor belt mechanism, wherein the frame is arranged on one side of the lampshade forming equipment, the sheet sucking manipulator, the front heater and the rear heater are sequentially installed on the frame toward the lampshade forming equipment, the conveyor belt mechanism is placed below the sheet sucking manipulator, the front heater and the rear heater, and the conveyor belt mechanism includes a conveyor belt mechanism. The belt frame, conveyor belt, pulley, conveyor belt drive mechanism, and conveyor belt frame drive mechanism are provided. The conveyor belt is mounted on the rotating shaft of the conveyor belt frame. The conveyor belt frame is slidably engaged with the frame via the pulley. The conveyor belt drive mechanism is fixed to the conveyor belt frame, with its drive end engaging with the rotating shaft of the conveyor belt frame. The conveyor belt frame drive mechanism is fixed to the frame, with its drive end engaging with the driven end of the conveyor belt frame. The frame is provided with a transverse track. A sheet suction robot moves and engages on the transverse track. A table for placing sheet materials is provided below the outer section of the transverse track. The disadvantages of this solution are: first, after the sheet is heated, it is fed into the forming station via the conveyor belt and the conveyor belt frame on it. The sheet slides into the forming station, resulting in poor positioning accuracy of the sheet, which will result in a low yield. Second, the assembly line operation of a single heating station will affect the further improvement of the efficiency of the automatic forming process.

[0004] The Chinese patent No. CN102700042B previously applied by the applicant discloses a flow operation device for compression molding of large plastic sheets, the structural features of which include a feeding mechanism, a heating box, a compression molding machine and a conveying mechanism, the feeding mechanism, the heating box and the compression molding machine are arranged in sequence, the conveying mechanism is installed between the feeding mechanism, the heating box and the compression molding machine, the conveying mechanism is composed of a frame, a slide rail, a sliding frame, a metal mesh, a gear rack mechanism, a chain transmission mechanism, a sliding frame electric drive and a chain transmission electric drive, wherein the slide rail crosses the working area of the feeding mechanism and the heating box, the sliding frame slides on the slide rail and is molded. The molding machine's molding area and loading area are located at the front and rear stops of the slide. A chain drive mechanism is located on each side of the slide, spanning the front and rear portions of the slide. A metal mesh is connected between the chains of the two chain drives. Each chain drive mechanism consists of a sprocket shaft rotatably engaged with the slide, a sprocket mounted on the sprocket shaft, and a chain engaged with the sprocket. Each chain drive mechanism utilizes a double-row chain structure. The slide's electric drive is fixed to the machine frame and driven by the slide via a rack-and-pinion mechanism. The chain drive's electric drive is fixed to the slide and driven by the sprocket shaft of the chain drive mechanism. This solution has the following disadvantages: first, the slide and its metal mesh transport the heated sheet to the molding area of the compression molding machine, where the sheet is then dropped onto the lower die of the compression molding machine. This poor sheet positioning accuracy results in a low yield; second, the assembly line operation of a single heating station hinders further improvements in the efficiency of the automated molding process. Summary of the Invention

[0005] In order to overcome the problems in the prior art of poor positioning accuracy of the sheet entering the forming station after heating, resulting in low yield, and the problem that the assembly line operation of a single heating station will affect the further improvement of the efficiency of automatic forming processing, the purpose of the present invention is to provide an improved automatic conveying device for single sheet thermoforming processing, which can overcome the defects of the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an automatic conveying device for single sheet hot forming processing, including a frame and a material receiving station, a heating station and a forming station arranged on the frame, characterized in that: the heating station consists of a first heating station and a second heating station, the first heating station and the second heating station are arranged on the left and right sides of the material receiving station respectively, and the forming station is arranged at the front or rear side of the material receiving station, the first heating station is provided with a first slide rail, a first electric linear guide drive module and a first material receiving tray under the first heater, the first slide rail extends from the first heating station to the material receiving station, the first material receiving tray is slidably fitted on the first slide rail, the first electric linear guide drive module is driven and connected to the first material receiving tray, the second heating station is provided with a first slide rail, a first electric linear guide drive module and a first material receiving tray under the first heater, the first slide rail extends from the first heating station to the material receiving station, the first material receiving tray is slidably fitted on the first slide rail, the first electric linear guide drive module is driven and connected to the first material receiving tray, A second slide rail, a second electric linear guide drive module and a second material receiving tray are provided below the heater, the second slide rail extends from the second heating station to the material receiving station, the second material receiving tray is slidably fitted on the second slide rail, and the second electric linear guide drive module is driven and connected to the second material receiving tray, a third electric linear guide drive module, a third slide rail and a transverse slide are provided on the forming station, the third electric linear guide drive module and the third slide rail are respectively arranged on the left and right sides of the lower forming mold on the forming station, one end of the transverse slide is fixed on the drive end of the third electric linear guide drive module and the other end is slidably fitted on the third slide rail, an electric sheet clamp is provided on the side of the transverse slide facing the material receiving station, and a molded product push palm is provided on the side of the transverse slide facing the forming station.

[0007] The transverse slide in the above technical solution may be located above the lower forming die.

[0008] In the above technical solution, when the transverse slide is at the front stop position close to the material receiving station, the molded product pusher on the transverse slide may be outside the upper and lower molding dies of the molding station.

[0009] In the above technical solution, the first slide rail can be composed of a first front slide rail and a first rear slide rail, the second slide rail can be composed of a second front slide rail and a second rear slide rail, the first front slide rail and the second front slide rail can be composed of a slide rail running through the first heating station, the material splicing station and the second heating station, and the first rear slide rail and the second rear slide rail can be composed of another slide rail running through the first heating station, the material splicing station and the second heating station.

[0010] In the above technical solution, a plurality of electric sheet clamps can be arranged on the transverse slide.

[0011] In the above technical solution, two molded product pushing palms can be arranged on the horizontal slide.

[0012] In the above technical solution, the first electric linear guide drive module, the second electric linear guide drive module and the third electric linear guide drive module can be respectively provided with a module slide rail, a slide slidingly fitted on the module slide rail and a motor connected to the slide for driving. The slide is the driving end, and the motor generally adopts a servo motor or a stepper motor.

[0013] In the above technical solution, tooth-shaped notches can be evenly distributed on the edges of the first and second receiving trays facing the transverse slide. When the transverse slide is at the front stop position close to the material receiving station, the front end clamp of the electric sheet clamp is located at the tooth-shaped notch. The tooth-shaped notches are provided on the edges of the first and second receiving trays facing the transverse slide to prevent the front edge of the sheet on the receiving tray from exceeding the front edge of the receiving tray and sagging after heating, which would cause the electric sheet clamp to clamp incorrectly or clamp poorly. The convex teeth on both sides of the tooth-shaped notch serve to support the front edge of the sheet, and the tooth-shaped notch provides a clamping position for the front end clamp of the electric sheet clamp.

[0014] In the above technical solution, the bottom side of the first receiving tray can be provided with a first tray frame that slides with the first slide rail, and the bottom side of the second receiving tray can be provided with a second tray frame that slides with the second slide rail.

[0015] The beneficial effects of the present invention are: first, since the heating station consists of a first heating station and a second heating station, the first heating station and the second heating station are respectively arranged on the left and right sides of the material receiving station, and the forming station is arranged on the front or rear side of the material receiving station, the first heating station is provided with a first slide rail, a first electric linear guide drive module and a first material receiving tray that cooperate with each other under the first heater, and the second heating station is provided with a second slide rail, a second electric linear guide drive module and a second material receiving tray that cooperate with each other under the second heater, so the first heating station and the second heating station can respectively receive the heated sheet, heat the sheets respectively and provide the sheets to be formed to the forming station in turn, so as to adapt to the organic coordination of the slow rhythm of the heating station and the fast rhythm of the forming station, which can effectively double the forming processing efficiency; second, the electric sheet clamp on the horizontal slide is used to clamp the first material receiving tray and the second material receiving tray The front edge of the sheet on the material tray is controlled by the third electric linear guide drive module to control the horizontal slide to pull the sheet to the top side of the lower forming mold, so that the sheet is accurately positioned to cover the mold cavity of the lower forming mold. Compared with the existing technology of throwing or sliding the sheet to the lower forming mold, the yield of the forming process can be effectively improved; thirdly, the operation of the first material receiving tray, the second material receiving tray and the horizontal slide are all controlled by the electric linear guide drive module. Compared with the existing technology of using conveyor belts or chain drives, the adjustability, controllability and accuracy of the position and time nodes of the sheet operation coordination between each workstation can be greatly improved, so that the multi-station operation can achieve the best coordination efficiency; fourthly, a molded product pusher is provided on the horizontal slide. While the electric sheet clamp clamps the front edge of the sheet to pull the sheet to the top side of the lower forming mold, the molded product pusher pushes the molded product that has completed molding on the lower forming mold out of the lower forming mold, effectively improving the molding process efficiency and the degree of processing automation.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic AA cross-sectional view of the first embodiment of the present invention (the cross-sectional area is omitted).

[0018] Figure 2 yes Figure 1 BB cross-sectional view (omitting the cross-sectional area).

[0019] Figure 3 yes Figure 1 A schematic diagram of the partial C enlargement.

[0020] In the figure: 1. Frame; 2. Material receiving station; 3. Heating station (first heating station); 4. Forming station; 5. Second heating station; 6. First heater; 7. First slide rail; 8. First electric linear guide drive module; 9. First receiving tray; 10. Second heater; 11. Second slide rail; 12. Second electric linear guide drive module; 13. Second receiving tray; 14. Third electric linear guide drive module; 15. Third slide rail; 16. Horizontal slide; 17. Lower forming die; 18. Electric sheet clamp; 19. Formed product push palm; 20. First front slide rail; 21. First rear slide rail; 22. Second front slide rail; 23. Second rear slide rail; 24. Toothed notch; 25. Front end clamp of electric sheet clamp; 26. First tray; 27. Second tray. Implementation Method

[0021] Reference Figures 1 and 2 , the automatic conveying device for single sheet thermoforming processing includes a frame 1 and a material receiving station 2, a heating station 3, and a forming station 4 arranged on the frame 1, and is characterized in that: the heating station 3 consists of a first heating station 3 and a second heating station 5, the first heating station 3 and the second heating station 5 are arranged on the left and right sides of the material receiving station 2 respectively, and the forming station 4 is arranged on the front side of the material receiving station 2, and the first heating station 2 is provided with a first slide rail 7, a first electric linear guide drive module 8 and a first material receiving tray 9 under the first heater 6, the first slide rail 7 extends from the first heating station 3 to the material receiving station 2, the first material receiving tray 9 is slidably fitted on the first slide rail 7, the first electric linear guide drive module 8 is driven and connected to the first material receiving tray 9, and the second heating station 5 is provided with a second slide rail 11 and a second electric linear guide under the second heater 10 The driving module 12 and the second material receiving tray 13, the second slide rail 11 extends from the second heating station 5 to the material receiving station 2, the second material receiving tray 13 is slidably fitted on the second slide rail 11, and the second electric linear guide driving module 12 is driven and connected to the second material receiving tray 13. The forming station 4 is provided with a third electric linear guide driving module 14, a third slide rail 15 and a transverse slide 16. The third electric linear guide driving module 14 and the third slide rail 15 are respectively arranged on the left and right sides of the lower forming mold 17 on the forming station 4, one end of the transverse slide 16 is fixed on the driving end of the third electric linear guide driving module 14 and the other end is slidably fitted on the third slide rail 11, and the transverse slide 16 is provided with an electric sheet clamp 18 on the side facing the material receiving station 4, and the transverse slide 16 is provided with a molded product push palm 19 on the side facing the forming station 4.

[0022] In addition, the transverse slide 16 is located above the lower molding die 17 .

[0023] When the transverse slide 16 is at the front stop position close to the material receiving station 2 , the molded product pushing palm 19 on the transverse slide 16 is outside the upper molding die (not shown) and the lower molding die 17 of the molding station 4 .

[0024] The first slide rail 7 is composed of a first front slide rail 20 and a first rear slide rail 21, and the second slide rail 11 is composed of a second front slide rail 22 and a second rear slide rail 23. The first front slide rail 20 and the second front slide rail 22 are composed of a slide rail that runs through the first heating station 3, the material splicing station 2 and the second heating station 5, and the first rear slide rail 21 and the second rear slide rail 23 are composed of another slide rail that runs through the first heating station 3, the material splicing station 2 and the second heating station 5.

[0025] A plurality of electric sheet clamps 18 are arranged on the transverse slide 16 .

[0026] Two molded product pushing palms 19 are arranged on the transverse slide 16 .

[0027] The first electric linear guide drive module 8, the second electric linear guide drive module 12 and the third electric linear guide drive module 14 are respectively provided with a module slide rail, a slide slidingly fitted on the module slide rail and a motor connected to the slide for driving. The slide is the driving end, and the motor is a servo motor or a stepper motor.

[0028] Reference Figure 3 , the first receiving plate 9 is evenly distributed with tooth-shaped notches 24 on the edge facing the transverse slide 16. When the transverse slide 16 is at the front stop position close to the material receiving station 2, the front end clamp 25 of the electric sheet clamp 18 is at the position of the tooth-shaped notch 24.

[0029] A first tray frame 26 that is slidably engaged with the first slide rail 7 is provided on the bottom side of the first receiving tray 9 , and a second tray frame 27 that is slidably engaged with the second slide rail 11 is provided on the bottom side of the second receiving tray 13 .

[0030] When using, such as Figures 1 to 3As shown, the first receiving tray 9 is on the receiving station 2, and the second receiving tray 13 is on the second heating station 5; when the feeding mechanism above the receiving station 2 places a sheet to be processed on the first receiving tray 9, the front edge of the sheet is flush with the front edge of the first receiving tray 9, and then the first electric linear guide drive module 8 drives the first receiving tray 9 to move to the left to under the first heater 6, and then the first heater 6 starts to heat the sheet on the first receiving tray 9; at this time, the second electric linear guide drive module 12 drives the second receiving tray 13 to move to the left to the receiving station 2, and the feeding mechanism above the receiving station 2 puts another sheet to be processed The sheet is placed on the second receiving tray 9, and the front edge of the sheet is flush with the front edge of the second receiving tray 13. Then the second electric linear guide drive module 12 drives the second receiving tray 13 to move to the right to under the second heater 10, and the second heater 10 starts to heat the sheet on the second receiving tray 13; at the same time, the first electric linear guide drive module 8 drives the first receiving tray 9 to move the heated sheet on it to the right to the material receiving station 2; then the third electric linear guide drive module 14 drives the transverse slide 16 to move toward the material receiving station 2 to the front stop position. At this time, the front end clamp 25 of the electric sheet clamp 18 on the transverse slide 16 At the position of the tooth-shaped notch 24 of the first material receiving tray 9, the front edge of the sheet on the tooth-shaped notch 24 is clamped, and then the third electric linear guide drive module 14 drives the transverse slide 16 to move in the direction away from the material receiving station 2 to the rear stop position, and the molded product pusher 19 on the transverse slide 16 pushes the molded product that has completed the molding process on the lower molding die 17 out of the lower molding die 17, and at the same time, the transverse slide 16 pulls the sheet on the first material receiving tray 9 to the exact position of the mold cavity of the lower molding die 17 of the molding station 4 through the electric sheet clamp 18; then the third electric linear guide drive module 14 drives the transverse slide 16 to the direction close to the material receiving station 2 It moves to the front stop position, so that the molded product push palm 19 is outside the upper molding die and the lower molding die 17 of the molding station 4, and then the upper molding die and the lower molding die 17 mold the sheet on the mold cavity; when the horizontal slide 16 moves to the front stop position, the first receiving tray 9 has received another sheet to be processed and then moves to the bottom of the first heater 6 for heating, while the second receiving tray 9 carrying the other heated sheet is located on the material receiving station 2, and the front end clamping mouth 25 of the electric sheet clamp 18 on the horizontal slide 16 is just at the position of the tooth-shaped notch of the second receiving tray 13, clamping the front edge of the sheet on the tooth-shaped notch, ... and so on.

Claims

1. An automatic conveying device for thermoforming a single sheet, comprising a frame and a material receiving station, a heating station, and a forming station arranged on the frame, characterized in that: The heating station consists of a first heating station and a second heating station, the first heating station and the second heating station are respectively arranged on the left and right sides of the material receiving station, and the molding station is arranged on the front or rear side of the material receiving station, and the first heating station is provided with a first slide rail, a first electric linear guide driving module and a first material receiving tray under the first heater, the first slide rail extends from the first heating station to the material receiving station, the first material receiving tray is slidably fitted on the first slide rail, and the first electric linear guide driving module is driven and connected to the first material receiving tray, and the second heating station is provided with a second slide rail, a second electric linear guide driving module and a second material receiving tray under the second heater, the second slide rail extends from the second heating station to the material receiving station, and the second material receiving tray is slidably fitted on the second slide rail, and the second electric linear guide driving module is driven and connected to the second material receiving tray, and the molding station is provided with a third electric linear guide driving module. The cam is fixed to the left side of the second moving member and is engaged with the third driving member, and the cam is fixed to the left side of the second moving member and is engaged with the third driving member, and the cam is connected with the third driving member to the right side of the second moving member and is engaged with the third driving member, 2. The automatic conveying device for single sheet thermoforming processing according to claim 1, characterized in that: The first slide rail is composed of a first front slide rail and a first rear slide rail, the second slide rail is composed of a second front slide rail and a second rear slide rail, the first front slide rail and the second front slide rail are composed of a slide rail that runs through the first heating station, the material splicing station and the second heating station, and the first rear slide rail and the second rear slide rail are composed of another slide rail that runs through the first heating station, the material splicing station and the second heating station.

3. The automatic conveying device for single sheet thermoforming according to claim 1 or 2, characterized in that: A plurality of the electric sheet clamps are arranged on the transverse slide.

4. The automatic conveying device for single sheet thermoforming processing according to claim 1 or 2, characterized in that: There are two molded product pushing palms arranged on the horizontal slide.

5. The automatic conveying device for single sheet thermoforming according to claim 1 or 2, characterized in that: The first electric linear guide drive module, the second electric linear guide drive module and the third electric linear guide drive module are respectively provided with a module slide rail, a slide slidingly fitted on the module slide rail and a motor connected to the slide for driving. The slide is the driving end, and the motor is a servo motor or a stepper motor.

6. The automatic conveying device for single sheet thermoforming processing according to claim 1 or 2, characterized in that: A first tray frame that is in sliding cooperation with the first slide rail is provided on the bottom side of the first receiving tray, and a second tray frame that is in sliding cooperation with the second slide rail is provided on the bottom side of the second receiving tray.

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