Drying device for PET sheet production and processing

Abstract

The utility model provides a drying device for PET (polyethylene terephthalate) sheet production and processing, which relates to the technical field of PET sheet processing and comprises a mesh belt conveying belt arranged on a mounting frame, baffles are symmetrically arranged on two sides of the mesh belt conveying belt, an upper drying chamber is erected on the baffles, and an inlet and an outlet which allow PET sheets to enter and exit are arranged on the upper drying chamber. A lower drying box with the top open is arranged on the mounting frame, uniform drying assemblies are arranged in the upper drying chamber and the lower drying chamber, an air heater is arranged on the upper drying chamber, the output end of the air heater is connected with a three-way pipe, and two pipelines of the three-way pipe communicate with conveying pipes correspondingly; according to the device, assembly line conveying of the PET sheets can be achieved, the upper face and the lower face are evenly dried at the same time in the conveying process, the PET sheets are directly conveyed to a packaging area subsequently, a round of drying process of the reverse faces of the PET sheets does not need to be conducted again after manual intervention overturning, the drying time is shortened, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PET sheet processing, in particular to a drying device for producing and processing PET sheets. Background Art

[0002] PET is made by the ester exchange of dimethyl terephthalate and ethylene glycol or the esterification of terephthalic acid and ethylene glycol to synthesize dihydroxyethyl terephthalate, and then undergoing a condensation reaction. It is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer with a smooth and glossy surface. There are three thermoforming processing methods for PET sheets: negative pressure thermoforming, positive pressure thermoforming, and positive and negative pressure thermoforming.

[0003] At present, after the PET sheets are produced and cleaned, they need to be dried and packaged. The existing drying device has a relatively simple structure and usually uses a single-duct drying device to dry the sheets. However, this drying method not only has poor drying effect but also low drying efficiency, resulting in unsatisfactory drying effect, affecting production efficiency and bringing inconvenience to users.

[0004] Announcement No. CN218764436U proposes a drying device for PET sheet production and processing. The device solves the problem that the PET sheets need to be dried and packaged after being cleaned after production. The existing drying device has a relatively simple structure and usually uses a single-duct drying device to dry the sheets. However, this drying method not only has poor drying effect but also low drying efficiency, resulting in unsatisfactory drying effect, affecting production efficiency and bringing inconvenience to users. However, after the device completes the drying of one side of the PET sheet, it is necessary to manually turn over several PET sheets in turn and perform another round of drying process on the reverse side, which is time-consuming and the drying effect needs to be further improved. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose a drying device for PET sheet production and processing.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A drying device for PET sheet production and processing comprises a mesh belt conveyor arranged on a mounting frame, baffles are symmetrically arranged on both sides of the mesh belt conveyor, an upper drying chamber is mounted on the baffles, an inlet and an outlet for allowing PET sheets to enter and exit are arranged on the upper drying chamber, a lower drying box with an open top is arranged on the mounting frame, uniform drying components are arranged in the upper drying chamber and the lower drying box, a hot air blower is arranged on the upper drying chamber, an output end of the hot air blower is connected to a three-way pipe, two pipelines of the three-way pipe are respectively connected to conveying pipes, and the two conveying pipes are respectively connected to two groups of uniform drying components inside the upper drying chamber and the lower drying box for simultaneous drying of the upper and lower surfaces of the PET sheet.

[0008] The device can realize the assembly line transportation of PET sheets and evenly dry the upper and lower surfaces at the same time during the transportation process. The sheets can be directly transported to the packaging area afterwards without manual intervention to turn them over and then carry out a round of drying process on the back of the PET sheets. The drying time is shortened and the efficiency is improved.

[0009] Furthermore, the uniform drying component includes a main pipe, branch pipes and nozzles. The upper drying chamber and the lower drying box are both provided with a main pipe, the main pipe is provided with a plurality of branch pipes, and each branch pipe is connected with a plurality of nozzles.

[0010] The above scheme realizes simultaneous drying of the upper and lower surfaces of the PET sheet by using a uniform drying component in conjunction with a hot air blower and a three-way pipe.

[0011] Furthermore, an inclined flow guide platform and a liquid outlet channel at the end of the flow guide platform are provided at the bottom end of the lower drying box.

[0012] In the above scheme, the guide platform can guide the dripping water to the liquid outlet channel and then collect the material at a fixed point.

[0013] Furthermore, a plurality of vibration motors are symmetrically arranged on the baffle.

[0014] The above scheme can make the PET sheet vibrate slightly on the mesh conveyor belt through the vibration motor, so that the moisture can be shaken off quickly, the drying effect is better, and no rework is required later.

[0015] Furthermore, a heat-insulating component is provided on the inner wall of the upper drying chamber, and the heat-insulating component is one of heat-insulating cotton or heat-insulating board.

[0016] Furthermore, a heat-insulating curtain is provided between the baffle and the outer wall of the lower drying box.

[0017] The above solution can reduce the rate of heat loss to the external environment during the drying process of the PET sheets by using the thermal insulation parts in combination with the thermal insulation curtains, thereby saving energy.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] Compared with the existing technology, this device can realize the assembly line transportation of PET sheets and evenly dry the upper and lower surfaces at the same time during the transportation process. It can be directly transported to the packaging area afterwards. There is no need for manual intervention to turn the sheets over and then carry out a round of drying process on the back of the PET sheets. The drying time is shortened and the efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the interior of the lower drying box;

[0022] Figure 3 This is a schematic diagram of the baffle installation;

[0023] Reference numerals:

[0024] 1. Mesh conveyor belt; 11. Baffle; 12. Vibration motor; 21. Upper drying chamber; 201. Entrance; 202. Exit; 22. Lower drying box; 23. Main pipe; 24. Branch pipe; 25. Nozzle; 26. Liquid outlet channel; 27. Guide table; 3. Hot air blower; 31. Tee pipe; 32. Conveying pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0026] like Figures 1 to 3 As shown, a drying device for PET sheet production and processing comprises a mesh conveyor 1 arranged on a mounting frame, the mounting frame is shown in the figure without a number, baffles 11 are symmetrically arranged on both sides of the mesh conveyor 1, an upper drying chamber 21 is mounted on the baffle 11, the upper drying chamber 21 is provided with an inlet 201 and an outlet 202 for allowing PET sheets to enter and exit, a lower drying box 22 with an open top is arranged on the mounting frame, uniform drying components are arranged in the upper drying chamber 21 and the lower drying box 22, a hot air blower 3 is arranged on the upper drying chamber 21, the output end of the hot air blower 3 is connected to a three-way pipe 31, two pipelines of the three-way pipe 31 are respectively connected to a conveying pipe 32, and the two conveying pipes 32 are respectively connected to two groups of uniform drying components inside the upper drying chamber 21 and the lower drying box 22 for simultaneous drying of the upper and lower surfaces of the PET sheets.

[0027] Specifically, the uniform drying component includes a main pipe 23, a branch pipe 24 and a nozzle 25. The upper drying chamber 21 and the lower drying box 22 are both provided with a main pipe 23, and a plurality of branch pipes 24 are provided on the main pipe 23. Each branch pipe 24 is connected to a plurality of nozzles 25. The uniform drying component cooperates with the hot air blower 3 and the three-way pipe 31 to achieve simultaneous drying of the upper and lower surfaces of the PET sheet.

[0028] Further refinement of the embodiment of the present utility model is as follows: Figure 2 As shown, an inclined guide platform 27 and a liquid outlet channel 26 at the end of the guide platform 27 are provided at the bottom of the lower drying box 22; the guide platform 27 can guide the dripping water to the liquid outlet channel 26 for fixed-point discharge and collection.

[0029] It should be noted that the mesh conveyor belt 1 and the hot air blower 3 are electrically connected to the controller, which is not shown in the figure.

[0030] The workflow of this utility model:

[0031] First, the cleaned PET sheets are placed on the mesh conveyor belt 1 in sequence. The PET sheets are not shown in the figure. After placement, the PET sheets are not allowed to stack. This process can be performed by a six-degree-of-freedom robot instead of manual work. On the one hand, this can reduce the probability of surface contamination of the PET sheets, and on the other hand, it can reduce the labor intensity of manual assembly line discharge. As the PET sheets are conveyed, they will enter along the entrance 201 of the upper drying chamber 21. At this time, the controller controls the hot air blower 3 to work and then synchronously convey hot air to the two conveying pipes 32. Then the hot air is injected into the uniform drying components inside the upper drying chamber 21 and the lower drying box 22 respectively. At this time, the upper drying chamber 21 blows air from top to bottom to the upper surface of the PET sheets. For uniform drying, air is blown from bottom to top in the lower drying box 22 to dry the bottom surface of the PET sheet. It should be noted that the drying wind force is controllable and will not cause the PET sheet to move. In this way, the drying process of the upper and lower surfaces of the PET sheet can be realized in one transportation and the drying is sufficiently uniform. Water droplets dripping during the drying process fall into the lower drying box 22 and finally flow out from the liquid outlet channel 26 for collection. Compared with the prior art, the present device can realize the assembly line transportation of the PET sheet and evenly dry the upper and lower surfaces at the same time during the transportation process, and then directly transport it to the packaging area, without the need for manual intervention to turn the sheet over and then carry out a round of drying process on the back of the PET sheet, so the drying time is shortened and the efficiency is improved.

[0032] In some embodiments, Figure 1 As shown, a plurality of vibration motors 12 are symmetrically arranged on the baffle 11; in this embodiment, the vibration motor 12 can make the PET sheet slightly vibrate on the mesh conveyor belt 1, thereby quickly shaking off the moisture, achieving a better drying effect, and no subsequent rework is required.

[0033] In other embodiments, a heat-insulating component is provided on the inner wall of the upper drying chamber 21, and the heat-insulating component is one of heat-insulating cotton or heat-insulating board; this embodiment can reduce the speed of heat loss from the upper drying chamber 21 to the outside through the heat-insulating component, thereby saving energy.

[0034] As a further optimization of the above embodiment, a heat-insulating curtain is provided between the baffle 11 and the outer wall of the lower drying box 22, and the heat-insulating curtain is not shown in the figure. The heat-insulating curtain can further reduce the heat loss rate.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A drying device for PET sheet production and processing, characterized in that: The invention comprises a mesh conveyor belt (1) arranged on a mounting frame, baffles (11) are symmetrically arranged on both sides of the mesh conveyor belt (1), an upper drying chamber (21) is arranged on the baffles (11), the upper drying chamber (21) is provided with an entrance (201) and an exit (202) for allowing PET sheets to enter and exit, a lower drying box (22) with an open top is arranged on the mounting frame, uniform drying components are arranged in the upper drying chamber (21) and the lower drying box (22), a hot air blower (3) is arranged on the upper drying chamber (21), the output end of the hot air blower (3) is connected to a three-way pipe (31), two pipelines of the three-way pipe (31) are respectively connected to a conveying pipe (32), and the two conveying pipes (32) are respectively connected to two groups of uniform drying components in the upper drying chamber (21) and the lower drying box (22) for simultaneous drying of the upper and lower surfaces of the PET sheets.

2. A drying device for producing and processing PET sheets according to claim 1, characterized in that: The uniform drying component comprises a main pipe (23), a branch pipe (24) and a nozzle (25); the upper drying chamber (21) and the lower drying box (22) are both provided with a main pipe (23); a plurality of branch pipes (24) are provided on the main pipe (23); and each branch pipe (24) is connected to a plurality of nozzles (25).

3. A drying device for producing and processing PET sheets according to claim 1, characterized in that: The bottom end of the lower drying box (22) is provided with an inclined flow guide platform (27) and a liquid outlet channel (26) at the end of the flow guide platform (27).

4. A drying device for producing and processing PET sheets according to claim 1, characterized in that: A plurality of vibration motors (12) are symmetrically arranged on the baffle (11).

5. A drying device for producing and processing PET sheets according to claim 1, characterized in that: The inner wall of the upper drying chamber (21) is provided with a heat-insulating component, which is one of heat-insulating cotton and heat-insulating board.

6. A drying device for producing and processing PET sheets according to claim 1, characterized in that: A heat-insulating curtain is provided between the baffle (11) and the outer wall of the lower drying box (22).

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