Preheating equipment for plastic sheet processing

Abstract

The utility model relates to the technical field of plastic sheet processing, in particular to plastic sheet processing preheating equipment which comprises a heating kiln body, a supporting plate is fixedly installed on the inner wall of the heating kiln body and extends to the outside of the heating kiln body, and a bearing plate for bearing plastic sheets is horizontally and slidably connected to the supporting plate. A sheet limiting mechanism is arranged in an inner cavity of the bearing plate and comprises two pressing plates which are symmetrically, vertically and slidably connected to the supporting plate, the pressing plates extend to the inner cavity of the bearing plate, racks are fixedly installed on the two sides of the bearing plate, gears meshed with the racks are rotationally connected to the supporting plate, and rotating rods are fixedly installed in inner cavities of the gears. The external thread of the rotating rod is sleeved with a thread sleeve fixedly connected with the pressing plate in a threaded mode. After the plastic sheet is preheated, the limiting of the pressing plate can be relieved through the sliding of the bearing plate, so that the pretreated plastic sheet can be conveniently and quickly taken out, and continuous production of equipment is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic sheet processing, in particular to a preheating device for plastic sheet processing. Background Art

[0002] When plastic sheets are produced and processed, a heating and preheating device is needed to heat and preheat the plastic sheets, so as to improve the plasticity of the sheets and prevent the plastic sheets from cracking and deforming during processing. At present, the common heating and preheating method for plastic sheets is mainly to use a heating kiln to achieve heating and preheating. The sheets to be heated are pushed into the heating kiln, and the temperature inside the kiln is used to heat and preheat the plastic sheets.

[0003] In the prior art, the utility model patent with the publication (announcement) number of CN215550233U and the name of a heating and preheating device for a PET sheet extrusion production line includes a drying kiln body. A moving frame is slidably connected inside the drying kiln body. A plurality of fixing plates are fixedly connected to both sides of the moving frame. A PET sheet body is slidably connected between the fixing plates. In this utility model, the PET sheet body is pushed onto the moving frame, and the arc-shaped elastic sheet is pushed into the groove. Through the action of the connecting rod, the T-shaped rod is pushed to move away from the cross tube. The hinged L-shaped rotating rod drives the pressing plate to move towards the side close to the PET sheet body, playing a limiting role on the PET sheet body. The moving frame is pushed into the drying kiln body for heat pretreatment. The pressing plate prevents the PET sheet body from shaking during movement, and the safety is relatively high. When it is necessary to separate the PET sheet body from the moving frame, the movable block is pulled to move, so that the two moving blocks move towards the direction close to the cross tube, and the pressing plate is separated from the PET sheet body, so as to separate the PET sheet body from the moving frame.

[0004] After the pretreatment of the plastic sheet by the device of this patent, it is necessary to pull the pull ring to release the limit of the PET sheet body, and only after the limit is released can it be taken out. The taking-out step is relatively troublesome and inconvenient for the continuous production of the device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a preheating device for plastic sheet processing.

[0006] The technical problem solved by the utility model is that for the existing device, after the pretreatment of the plastic sheet, it is necessary to pull the pull ring to release the limit of the PET sheet body, and only after the limit is released can it be taken out, and there is a problem that the sheet taking-out step is relatively troublesome.

[0007] The present utility model can be realized through the following technical solutions: a preheating device for plastic sheet processing, including a heating kiln body. One side of the heating kiln body is penetrated and provided with a feed inlet. One side of the heating kiln body is rotatably connected with a sealing door for closing the feed inlet. The inner wall of the heating kiln body is fixedly installed with a support plate, and the support plate extends to the outside of the heating kiln body. A carrier plate for carrying plastic sheets is horizontally slidably connected above the support plate. The bottom end of the carrier plate is fixedly installed with a sliding block, and a sliding groove for the sliding block to slide is opened in the inner cavity of the support plate. Through the cooperation of the sliding block and the sliding groove, it is convenient to improve the stability of the carrier plate when sliding; a sheet limiting mechanism is arranged in the inner cavity of the carrier plate. The sheet limiting mechanism includes two pressing plates symmetrically and vertically slidably connected above the support plate. The pressing plates extend into the inner cavity of the carrier plate. A flexible pad is fixedly installed on the side of the pressing plate close to the plastic sheet. The flexible pad is preferably a rubber pad. Through the setting of the rubber pad, damage to the plastic sheet is avoided when limiting the plastic sheet. Rack bars are fixedly installed on both sides of the carrier plate. A gear meshing with the rack bar is rotatably connected above the support plate. A rotating rod is fixedly installed in the inner cavity of the gear. A screw sleeve fixedly connected with the pressing plate is threadedly sleeved on the external thread of the rotating rod. By using the sliding of the support plate, not only can the conveying of the plastic sheet be realized, but also the plastic sheet can be limited during its conveying process, thus facilitating the use of the staff. And, after the preheating treatment of the plastic sheet, the limitation of the plastic sheet can be released through the sliding of the carrier plate, thus facilitating the staff to take out the plastic sheet in time.

[0008] A further technical improvement of the present utility model lies in that: two L-shaped clamping plates are symmetrically and elastically slidably connected in the inner cavity of the carrier plate. The pressing plates are slidably connected in the inner cavity of the L-shaped clamping plates. The length of the L-shaped clamping plates is less than the length of the plastic sheet, so as to facilitate taking out the plastic sheet after the pretreatment, and thus facilitate meeting the use requirements of the staff.

[0009] A further technical improvement of the present utility model lies in that: shielding frames are fixedly installed on both sides of the support plate, and the shielding frames are used to protect the gears and the rotating rods.

[0010] A further technical improvement of the present utility model lies in that: the screw sleeve is slidably connected with the inner wall of the shielding frame, so as to facilitate ensuring the stability of the screw sleeve during movement. The top end of the rotating rod is rotatably connected with the inner wall of the shielding frame.

[0011] A further technical improvement of the present utility model lies in that: synchronous columns vertically slidably connected with the inner cavity of the support plate are fixedly installed on both sides of the pressing plate. Through the setting of the two synchronous columns, it is convenient to balance the pressing plate, and thus facilitate the better vertical sliding of the pressing plate.

[0012] A further technical improvement of the present utility model lies in that: air-permeable plates convenient for preheating the plastic sheet are fitted and installed in the inner cavities of the support plate and the carrier plate. Through the setting of the air-permeable plates, it is convenient for the device to preheat the plastic sheet better.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. After the plastic sheet of the utility model is preheated, the racks fixedly connected to both sides thereof move synchronously through the sliding of the bearing plate. Through the meshing action between the rack and the gear, the gear rotates reversely. The rotating rod rotates synchronously driven by the gear. The nut sleeve on the external thread of the rotating rod moves upward through the rotation of the rotating rod. The pressing plate fixedly connected thereto moves synchronously through the movement of the nut sleeve. Thus, it is convenient to release the limit of the pressing plate through the sliding of the bearing plate without the need for other operations, thereby simplifying the extraction steps of the plastic sheet and facilitating the continuous production of the equipment.

[0015] 2. After the bearing plate of the utility model is completely pulled out, the plastic sheet to be pretreated is placed on the bearing plate and between two L-shaped clamping plates. Through the elastic force of the extrusion spring group, the two L-shaped clamping plates move relatively. Through the movement of the two L-shaped clamping plates, it is convenient to limit both sides of the plastic sheet. After limiting both sides of the plastic sheet, the bearing plate is slid into the inner cavity of the heating kiln body. When the bearing plate slides, the rack moves synchronously. Through the meshing action between the rack and the gear, the gear rotates forward. Through the forward rotation of the gear, the pressing plate moves downward, thereby facilitating further limiting of the plastic sheet and preventing it from shaking during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For the convenience of those skilled in the art to understand, the utility model will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is the overall structural schematic diagram of the utility model;

[0018] Figure 2 is the structural connection schematic diagram of the support plate of the utility model;

[0019] Figure 3 is the structural connection schematic diagram of the support plate of the utility model when the shielding frame is not fully installed;

[0020] Figure 4 is the utility model Figure 3 The partial enlarged view of A in.

[0021] In the figure:

[0022] 1. Heating kiln body;

[0023] 2. Feeding port;

[0024] 3. Support plate; 31. Bearing plate; 32. Extrusion spring group; 33. L-shaped clamping plate; 34. Rack; 35. Gear; 36. Rotating rod; 37. Screw sleeve; 38. Connecting rod; 39. Pressing plate; 310. Sliding groove; 311. Synchronization column;

[0025] 4. Shielding frame;

[0026] 5. Ventilation plate;

[0027] 6. Sealing door. Detailed implementation manners

[0028] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present utility model as follows.

[0029] Please refer to Figures 1-4 As shown, this embodiment provides a technical solution, a preheating device for plastic sheet processing, including a heating kiln body 1. A feed port 2 is penetrated and opened on one side of the heating kiln body 1. A sealing door 6 adapted to the feed port 2 is rotatably connected to one side of the heating kiln body 1. A support plate 3 is fixedly installed on the inner wall of the heating kiln body 1 and extends to the outside of the heating kiln body 1. A bearing plate 31 for carrying plastic sheets is horizontally slidably connected above the support plate 3. Extrusion spring groups 32 are fixedly installed on both inner side walls of the bearing plate 31. Two L-shaped clamping plates 33 for initially limiting the plastic sheets are symmetrically slidably connected in the inner cavity of the bearing plate 31. One side of the extrusion spring group 32 away from the inner wall of the bearing plate 31 is fixedly connected to the L-shaped clamping plate 33.

[0030] Racks 34 are fixedly installed on both sides of the bearing plate 31. A gear 35 meshing with the rack 34 is rotatably connected above the support plate 3. A rotating rod 36 is fixedly installed in the inner cavity of the gear 35. Shielding frames 4 are fixedly installed on both sides of the support plate 3. One end of the rotating rod 36 away from the support plate 3 is rotatably connected to the inner wall of the shielding frame 4. A screw sleeve 37 is threadedly sleeved on the external thread of the rotating rod 36. The screw sleeve 37 is slidably connected to the inner wall of the shielding frame 4. A connecting rod 38 is fixedly installed on one side of the screw sleeve 37 away from the shielding frame 4. A sliding groove 310 for the connecting rod 38 to slide is opened in the inner cavity of the L-shaped clamping plate 33. A pressing plate 39 for further limiting the plastic sheets is fixedly connected to the bottom end of the L-shaped clamping plate 33.

[0031] Synchronization columns 311 are fixedly installed on both sides of the pressing plate 39. The synchronization columns 311 are vertically slidably connected to the support plate 3.

[0032] The inner cavities of the support plate 3 and the carrier plate 31 are both embedded with air permeable plates 5 for convenient preheating of plastic sheets, wherein the air permeable plates 5 in the support plate 3 correspond to the air permeable plates 5 in the carrier plate 31, and the correspondence between the two facilitates the heating of the kiln body 1 to better preheat the plastic sheets.

[0033] When the utility model is in use, the sealing door 6 is rotated to expose the feed port 2 opened on one side of the heating kiln body 1, and then the bearing plate 31 on the support plate 3 is slid. With the sliding of the bearing plate 31, the racks 34 fixedly connected on both sides thereof move synchronously, and the gears 35 rotate in the opposite direction through the meshing action between the racks 34 and the gears 35. The rotating rod 36 is driven to rotate synchronously through the gears 35. The rotation of the rotating rod 36 causes the screw sleeve 37 on the external thread of the rotating rod 36 to move upward, and the movement of the screw sleeve 37 causes the pressing plate 39 fixedly connected thereto to move synchronously, so as to facilitate the subsequent fixing of the plastic sheet;

[0034] After the carrying plate 31 is fully pulled out, the plastic sheet to be pretreated is placed on the carrying plate 31 and between the two L-shaped clamping plates 33. The two L-shaped clamping plates 33 are relatively moved by the elastic force of the extrusion spring group 32. The movement of the two L-shaped clamping plates 33 is convenient for limiting the two sides of the plastic sheet. After limiting the two sides of the plastic sheet, the carrying plate 31 is slid to the inner cavity of the heating kiln body 1. When the carrying plate 31 slides, the rack 34 is driven to move synchronously. The gear 35 is rotated forwardly through the meshing action between the rack 34 and the gear 35. The positive rotation of the gear 35 causes the pressing plate 39 to move downward, which is convenient for further limiting the plastic sheet to prevent it from shaking during the transportation process. After the carrying plate 31 slides to the inner cavity of the heating kiln body 1, the sealing door 6 is reset, which is convenient for closing the feed port 2. Finally, the plastic sheet can be preheated by the heating kiln body 1.

[0035] After the plastic sheet is preheated, the sliding carrier plate 31 causes the racks 34 fixedly connected on both sides to move synchronously through the sliding of the carrier plate 31, and the gear 35 is rotated in the opposite direction through the meshing action between the rack 34 and the gear 35, and the rotating rod 36 is driven to rotate synchronously through the gear 35, and the screw sleeve 37 on the external thread of the rotating rod 36 is moved upward through the rotation of the rotating rod 36, and the pressure plate 39 fixedly connected thereto is moved synchronously through the movement of the screw sleeve 37, so that the limit of the pressure plate 39 can be released by the sliding of the carrier plate 31, so that the pretreated plastic sheet can be quickly taken out, thereby simplifying the plastic sheet removal steps and facilitating use.

[0036] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. Plastic sheet processing preheating equipment, including a heating kiln body (1), wherein a support plate (3) is fixedly installed on the inner wall of the heating kiln body (1), the support plate (3) extends to the outside of the heating kiln body (1), and a bearing plate (31) for bearing plastic sheets is horizontally slidably connected above the support plate (3), characterized in that: The inner cavity of the bearing plate (31) is provided with a sheet limiting mechanism. The sheet limiting mechanism includes two pressing plates (39) symmetrically and vertically slidably connected above the support plate (3). The pressing plates (39) extend into the inner cavity of the bearing plate (31). Rack bars (34) are fixedly installed on both sides of the bearing plate (31). A gear (35) meshing with the rack bars (34) is rotatably connected above the support plate (3). A rotating rod (36) is fixedly installed in the inner cavity of the gear (35). A screw sleeve (37) fixedly connected to the pressing plate (39) is threadedly sleeved on the external thread of the rotating rod (36).

2. The plastic sheet processing preheating device according to claim 1, characterized in that, Two L-shaped clamping plates (33) are symmetrically and elastically slidably connected in the inner cavity of the bearing plate (31). The pressing plates (39) are slidably connected to the inner cavities of the L-shaped clamping plates (33). The length of the L-shaped clamping plates (33) is less than the length of the plastic sheet.

3. The plastic sheet processing preheating device according to claim 1, characterized in that, Shielding frames (4) are fixedly installed on both sides of the support plate (3).

4. The plastic sheet processing preheating device according to claim 3, characterized in that, The screw sleeve (37) is slidably connected to the inner wall of the shielding frame (4). The top end of the rotating rod (36) is rotatably connected to the inner wall of the shielding frame (4).

5. The plastic sheet processing preheating device according to claim 1, characterized in that, Synchronization columns (311) vertically slidably connected to the inner cavity of the support plate (3) are fixedly installed on both sides of the pressing plate (39).

6. The preheating device for plastic sheet processing according to claim 1, characterized in that, Ventilation plates (5) facilitating preheating processing of the plastic sheet are fitted and installed in the inner cavities of the support plate (3) and the bearing plate (31).

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