A thermoforming apparatus for plastic cups

Abstract

This utility model discloses a thermoforming device for plastic cups, relating to the field of plastic cup production technology. It includes a main body for the thermoforming device, with a leveling mechanism on the left side for smoothing the sheet material during transport. The leveling mechanism includes a reversing unit and a smoothing unit, the smoothing unit being located inside the reversing unit. It includes a first mounting plate and a second mounting plate. A smoothing plate is fixedly mounted on the bottom of the first mounting plate, and a roller frame is fixedly mounted on the bottom of the second mounting plate. The smoothing unit in the leveling mechanism, through the coordinated action of the V-shaped smoothing plate and pressure rollers, achieves bidirectional smoothing and flattening of the sheet material, significantly improving its flatness. Furthermore, the reversing rollers and support plates in the reversing unit, working together in the smoothing action, further ensure that the sheet material is in a stable state before entering the heating furnace, thereby avoiding uneven heating and improving the molding quality of the plastic cup.

Description

Technical Field

[0001] This utility model relates to the field of plastic cup production technology, specifically a plastic cup thermoforming device. Background Technology

[0002] Plastic cups are convenient to use for beverages and liquid drinks such as tea, and are widely used in daily life. Plastic cups are generally processed by thermoforming machines.

[0003] According to the patent titled "A Thermoforming Device for Plastic Cups" (Patent Publication No.: CN217862741U, Patent Publication Date: 2022-11-22), the device includes a thermoforming machine and a base. The top front end of the thermoforming machine is welded with parallel upper fixing rods. Overcoming the shortcomings of existing technologies, this device incorporates a movable disc, connecting plate, rollers, an electric cylinder, and a piston rod. During movement and adjustment, the electric cylinder is controlled via the control panel on the control box. When the electric cylinder operates, the piston rod retracts, causing the rollers to lift the entire device. Movement and adjustment are then achieved via the rollers. After adjustment, the piston rod is moved via the control panel, which in turn moves the supporting feet to support the entire device, making movement and adjustment very convenient.

[0004] Based on the aforementioned existing technology, current plastic cup thermoforming devices still have the following problems: internal stress is generated during the conveying of the plastic sheet, and natural warping may occur. Directly feeding it into the heating furnace will lead to uneven heating. Therefore, this utility model provides a plastic cup thermoforming device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a plastic cup thermoforming device, which solves the following problems still existing in current plastic cup thermoforming devices: internal stress is generated during the conveying of plastic sheets, and natural warping may occur. Directly feeding them into the heating furnace will lead to uneven heating.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plastic cup thermoforming device, comprising a plastic cup thermoforming device body, wherein a leveling mechanism is provided on the left side of the plastic cup thermoforming device body for smoothing the sheet material during the conveying process, the leveling mechanism comprising: A reversing unit is located on the left side of the body of the plastic cup thermoforming device and is used to reverse the direction of the sheet material. The smoothing unit is located inside the reversing unit and includes a first mounting plate and a second mounting plate. A smoothing plate is fixedly mounted on the bottom of the first mounting plate, and a roller frame is fixedly mounted on the bottom of the second mounting plate. A pressure roller is rotatably mounted inside the roller frame. The smoothing plate presses and scrapes the sheet through an elastic unit, and the pressure roller presses and rolls the sheet to achieve smoothing.

[0007] Preferably, the smoothing plate is V-shaped, and the sheet moves towards the narrow end of the smoothing plate, smoothing the sheet to both sides through the beveled edge of the smoothing plate.

[0008] Preferably, the reversing unit includes a fixed frame fixedly installed on the left side above the main body floor of the plastic cup thermoforming device. A reversing roller is rotatably installed inside the fixed frame, and a support plate is fixedly installed inside the fixed frame. The support plate supports the sheet material and works with the smoothing plate and pressure roller to smooth it.

[0009] Preferably, the elastic unit includes a fixed plate fixedly installed inside the fixed frame, and a set of sliding columns are slidably installed through both sides of the interior of the fixed plate. The bottom ends of the set of sliding columns are respectively fixedly installed on the top sides of the first mounting plate and the second mounting plate.

[0010] Preferably, a spring is installed on the surface of the sliding column, and the spring's own elastic force pushes the first mounting plate and the second mounting plate to move, so that the flat plate and the pressure roller press down on the sheet.

[0011] Preferably, the bottom surface of the smoothing plate is provided with a flexible wear-resistant layer, and the surface of the pressure roller is covered with an elastic rubber layer to avoid scratching the surface of the sheet during the smoothing process.

[0012] This invention provides a thermoforming apparatus for plastic cups. Compared with the prior art, it has the following advantages: 1. In this plastic cup thermoforming device, the smoothing unit in the leveling mechanism achieves bidirectional smoothing and flattening of the sheet material through the coordinated action of the V-shaped smoothing plate and pressure roller, significantly improving the flatness of the sheet material. Furthermore, the reversing roller and support plate in the reversing unit work together to smooth the material, further ensuring that the sheet material is in a stable state before entering the heating furnace, thereby avoiding uneven heating and improving the molding quality of the plastic cup.

[0013] 2. This plastic cup thermoforming device achieves adaptive pressure smoothing through an elastic unit. Springs push the first and second mounting plates, allowing the smoothing plate and pressure rollers to automatically adjust pressure according to the sheet thickness, preventing excessive pressure damage. The flexible, wear-resistant layer at the bottom of the smoothing plate and the elastic rubber layer on the surface of the pressure rollers effectively prevent scratches on the sheet surface, ensuring the finished product's appearance quality. The overall structure is reasonable, operation is simple, and it is suitable for continuous production, possessing high practicality and promotional value. Attached Figure Description

[0014] Figure 1 This is a left-side perspective view of the three-dimensional structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the leveling mechanism of this utility model; Figure 3 This is a partial left-side perspective three-dimensional structural diagram of the present invention; Figure 4 This is a partial right-side perspective view of the three-dimensional structure of this utility model.

[0015] In the figure: 1-The main body of the plastic cup thermoforming device, 2-Leveling mechanism, 21-Reversing unit, 211-Fixed frame, 212-Reversing roller, 213-Support plate, 22-Smoothing unit, 221-First mounting plate, 222-Smoothing plate, 223-Second mounting plate, 224-Roller frame, 225-Pressure roller, 3-Elastic unit, 31-Fixed plate, 32-Sliding column, 33-Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: A plastic cup thermoforming apparatus includes a plastic cup thermoforming apparatus body 1. A leveling mechanism 2 is provided on the left side of the plastic cup thermoforming apparatus body 1 for smoothing the sheet material during the conveying process. The leveling mechanism 2 includes: The reversing unit 21 is located on the left side of the body 1 of the plastic cup thermoforming device and is used to reverse the direction of the sheet material; The smoothing unit 22 is located inside the reversing unit 21 and includes a first mounting plate 221 and a second mounting plate 223. A smoothing plate 222 is fixedly mounted on the bottom of the first mounting plate 221, and a roller frame 224 is fixedly mounted on the bottom of the second mounting plate 223. A pressure roller 225 is rotatably mounted inside the roller frame 224. The smoothing plate 222 presses and scrapes the sheet material through the elastic unit 3, and the pressure roller 225 presses and rolls the sheet material to achieve smoothing.

[0018] The leveling mechanism 2 includes a reversing unit 21 and a smoothing unit 22. The smoothing unit 22 works in conjunction with the smoothing plate 222 at the bottom of the first mounting plate 221 and the pressure roller 225 at the bottom of the second mounting plate 223 to achieve bidirectional smoothing and flattening of the sheet material, effectively improving the flatness of the sheet material, avoiding uneven heating caused by internal stress or warping, and improving the molding quality of the plastic cup.

[0019] In this embodiment, the smoothing plate 222 is V-shaped, and the sheet moves towards the narrow end of the smoothing plate 222, smoothing the sheet to both sides through the inclined edge of the smoothing plate 222.

[0020] The sheet moves towards the narrow end, and the V-shaped bevel is used to spread and smooth the sheet to both sides, further enhancing the smoothing effect and ensuring that the sheet remains flat before entering the heating furnace, thereby improving the stability of the thermoforming process and the quality of the finished product.

[0021] In this embodiment, the reversing unit 21 includes a fixed frame 211 fixedly installed on the left side above the floor of the plastic cup thermoforming device body 1. A reversing roller 212 is rotatably installed inside the fixed frame 211, and a support plate 213 is fixedly installed inside the fixed frame 211. The support plate 213 supports the sheet material and works with the smoothing plate 222 and the pressure roller 225 to smooth it.

[0022] The sheet material is reversed by the reversing roller 212, supported by the support plate 213, and smoothed by the smoothing plate 222 and the pressure roller 225, ensuring that the sheet material remains stable during conveying and reversing, and further improving the leveling effect.

[0023] In this embodiment, the elastic unit 3 includes a fixed plate 31 fixedly installed inside the fixed frame 211. A set of sliding columns 32 are slidably installed through both sides of the interior of the fixed plate 31. The bottom ends of the set of sliding columns 32 are respectively fixedly installed on the top sides of the first mounting plate 221 and the second mounting plate 223.

[0024] By sliding the sliding column 32 within the fixed plate 31, the first mounting plate 221 and the second mounting plate 223 can move up and down, providing elastic support for the flat plate 222 and the pressure roller 225, enabling them to adapt to sheets of different thicknesses and avoid excessive pressure damage.

[0025] In this embodiment, a spring 33 is installed on the surface of the sliding column 32. The spring 33 pushes the first mounting plate 221 and the second mounting plate 223 to move, so that the flat plate 222 and the pressure roller 225 press down on the sheet.

[0026] The spring force of the spring 33 pushes the first mounting plate 221 and the second mounting plate 223, enabling the smoothing plate 222 and the pressure roller 225 to automatically adjust the downward pressure according to the sheet thickness, achieving adaptive smoothing, protecting the sheet from damage, and ensuring a stable and reliable smoothing effect.

[0027] In this embodiment, the bottom surface of the smoothing plate 222 is provided with a flexible wear-resistant layer, and the surface of the pressure roller 225 is covered with an elastic rubber layer to avoid scratching the surface of the sheet during the smoothing process.

[0028] The bottom surface of the smoothing plate 222 is provided with a flexible wear-resistant layer, and the surface of the pressure roller 225 is covered with an elastic rubber layer to avoid scratching the surface of the sheet during the smoothing process and protect the appearance quality of the sheet.

[0029] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0030] During operation, the sheet material is first output through the electric cylinder on the left side of the body 1 of the plastic cup thermoforming device, and the sheet material passes between the flat plate 222, the pressure roller 225 and the support plate 213; Then, the spring 33 pushes the first mounting plate 221 and the second mounting plate 223 with its own elastic force, so that the smoothing plate 222 and the pressure roller 225 press the sheet down on the support plate 213. When the sheet moves between the smoothing plate 222, the pressure roller 225 and the support plate 213, the smoothing plate 222 pushes and smooths the sheet, and the pressure roller 225 rolls on the sheet to flatten and plasticize the sheet.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic cup thermoforming apparatus comprising a plastic cup thermoforming apparatus body (1), characterized in that: A leveling mechanism (2) is provided on the left side of the body (1) of the plastic cup thermoforming device for smoothing the sheet material during the conveying process. The leveling mechanism (2) includes: A reversing unit (21) is located on the left side of the body (1) of the plastic cup thermoforming device and is used to reversing the sheet material; The smoothing unit (22) is located inside the reversing unit (21) and includes a first mounting plate (221) and a second mounting plate (223). The bottom of the first mounting plate (221) is fixedly mounted with a smoothing plate (222), and the bottom of the second mounting plate (223) is fixedly mounted with a roller frame (224). The roller frame (224) is rotatably mounted with a pressure roller (225). The smoothing plate (222) presses and scrapes the sheet through the elastic unit (3), and presses and rolls the sheet through the pressure roller (225) to achieve smoothing of the sheet.

2. A device for thermoforming plastic cups according to claim 1, characterized in that: The smoothing plate (222) is V-shaped, and the sheet moves towards the narrow end of the smoothing plate (222) to smooth the sheet to both sides through the inclined edge of the smoothing plate (222).

3. The apparatus of claim 1, wherein: The reversing unit (21) includes a fixed frame (211) fixedly installed on the left side above the floor of the plastic cup thermoforming device body (1). A reversing roller (212) is rotatably installed inside the fixed frame (211), and a support plate (213) is fixedly installed inside the fixed frame (211). The sheet is supported by the support plate (213) and smoothed with the smoothing plate (222) and the pressure roller (225).

4. The apparatus of claim 1, wherein: The elastic unit (3) includes a fixed plate (31) fixedly installed inside the fixed frame (211). A set of sliding columns (32) are slidably installed on both sides of the inside of the fixed plate (31). The bottom ends of the set of sliding columns (32) are respectively fixedly installed on the top sides of the first mounting plate (221) and the second mounting plate (223).

5. The thermoforming apparatus for a plastic cup according to claim 4, characterized in that: A spring (33) is installed on the surface of the sliding column (32). The spring (33) pushes the first mounting plate (221) and the second mounting plate (223) to move, so that the flat plate (222) and the pressure roller (225) press down on the sheet.

6. The thermoforming apparatus for a plastic cup according to claim 1, characterized in that: The bottom surface of the smoothing plate (222) is provided with a flexible wear-resistant layer, and the surface of the pressure roller (225) is covered with an elastic rubber layer to avoid scratching the surface of the sheet during the smoothing process.

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