Thermoplastic machine with uniform heating function

Abstract

The utility model provides a thermoplastic machine capable of uniformly heating, which belongs to the technical field of thermoplastic machines and comprises a feeding device, a conveying track, a heating device, a forming device and a traction device. The end faces, facing each other, of the two fixing frames are each provided with at least one transverse heating area and at least one longitudinal heating area, a plurality of first heating tile sets arranged in the sheet conveying direction are arranged in the transverse heating areas, and the first heating tile sets are arranged in parallel in the direction perpendicular to the sheet conveying direction. A plurality of second heating tile sets arranged in the direction perpendicular to the sheet conveying direction are arranged in the longitudinal heating area, and the second heating tile sets are arranged in parallel in the sheet conveying direction. The heating device is divided into the transverse heating area and the longitudinal heating area, sheets can be heated from multiple directions at the same time, it is ensured that the sheets are heated more evenly as much as possible, and therefore the quality and appearance of formed products are improved.

Description

Technical Field

[0001] This utility model relates to the field of thermoplastic machine technology, specifically to a thermoplastic machine that provides uniform heating. Background Technology

[0002] A thermoplasticizer is a molding device based on the principle of thermoplastic processing. It heats and softens plastic raw materials, then applies pressure to shape them within a mold. It is widely used in the industrial production of plastic containers, packaging boxes, and other products. A traditional thermoplasticizer typically consists of a heating system, molding die, hydraulic system, and temperature control unit. Its core technology lies in the coordinated control of melt temperature, molding pressure, and cooling rate.

[0003] Traditional thermoforming machines typically employ a uniaxial array arrangement for their heating systems. This means that multiple heating tiles are arranged in a single, continuous pattern along the sheet conveying direction (longitudinal) or perpendicular to the conveying direction (transverse). When the sheet passes through the heating zone at a constant speed, uneven heating of the sheet is likely to occur. Generally, the heating effect is poor in the splicing area between adjacent heating tiles, which ultimately affects the quality and appearance of the molded product. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a thermoplasticizer with uniform heating.

[0005] The technical solution adopted by this utility model is as follows: This application provides a thermoplastic machine for uniform heating, used to process plastic boxes, including a feeding device, a conveying track, a heating device, a forming device, a traction device, and a control system. The feeding device is used to feed sheet material onto the conveying track. The heating device includes two fixed frames arranged parallel to each other. Each of the two fixed frames facing each other has at least one transverse heating zone and at least one longitudinal heating zone. The transverse heating zone is provided with a plurality of first heating tile groups arranged along the sheet conveying direction. The plurality of first heating tile groups are arranged in parallel along a direction perpendicular to the sheet conveying direction. The longitudinal heating zone is provided with a plurality of second heating tile groups arranged perpendicular to the sheet conveying direction. The plurality of second heating tile groups are arranged in parallel along the sheet conveying direction. The forming device is used to form the sheet material into a box body. The traction device is used to traction the sheet material along the conveying track through each heating zone and the forming device.

[0006] In some embodiments, the fixed frame is provided with a transverse heating zone and a longitudinal heating zone, wherein the transverse heating zone is located at one end near the feeding device and the longitudinal heating zone is located at one end near the forming device.

[0007] In some embodiments, the fixed frame is provided with a horizontal heating zone and two vertical heating zones, wherein the horizontal heating zone is located between the two vertical heating zones.

[0008] In some embodiments, the fixed frame is provided with two horizontal heating zones and one vertical heating zone, wherein the vertical heating zone is located between the two horizontal heating zones.

[0009] In some embodiments, the heating device further includes a translation mechanism, which includes a first movable frame and a first driver. The first movable frame is slidably disposed along the sheet conveying direction, and the first driver is used to drive the first movable frame to move. The fixed frame follows the first movable frame to move.

[0010] In some embodiments, the heating device further includes an ejection mechanism, which includes a second movable frame and a second driver. The second movable frame is slidably disposed on the first movable frame in a direction perpendicular to the sheet conveying direction. The second driver is used to drive the second movable frame to move, and the first movable frame follows the second movable frame.

[0011] In some embodiments, the first heating tile group and the second heating tile group are formed by splicing together the same heating tile units.

[0012] In some embodiments, a conveying platform is provided at one end of the heating device near the feeding device. A receiving roller, a first fixed shaft, and a second fixed shaft are provided on the conveying platform. The receiving roller is rotatably disposed at one end of the conveying platform near the feeding device. The first fixed shaft and the second fixed shaft are spaced apart on the conveying platform. A plurality of first pressure rollers are rotatably disposed on the first fixed shaft. A plurality of second pressure rollers are disposed on the second fixed shaft at a offset from the first pressure rollers. The sheet is conveyed between the conveying platform and the first and second pressure rollers.

[0013] In some embodiments, the device further includes two heating frames and a third driver for driving the respective heating frames to rotate. The conveyor table is provided with a third fixed shaft at one end near the heating device. The two heating frames are respectively rotatably disposed at both ends of the third fixed shaft. The heating frames are used to heat the edges of the sheet.

[0014] In some embodiments, both ends of the first fixed shaft and the second fixed shaft are provided with threaded rod portions, and the conveying platform is provided with vertical adjustment holes corresponding to each threaded rod portion, and a fixing nut is provided on the threaded rod portion.

[0015] The beneficial effects of this utility model are as follows: The heating device in this utility model is divided into a transverse heating zone and a longitudinal heating zone, which can heat the sheet material from multiple directions at the same time, so as to ensure that the sheet material is heated more evenly, thereby improving the quality and appearance of the molded product. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a schematic diagram of a thermoplasticizer with uniform heating according to the present invention;

[0018] Figure 2 This is a schematic diagram of the heating device in this utility model. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the transverse heating zone and the longitudinal heating zone in this utility model;

[0020] Figure 4 This is a schematic diagram of the heating device in this utility model. Figure 2 ;

[0021] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 6 for Figure 5 Enlarged view of point B in the middle. Detailed Implementation

[0023] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Secondly, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0026] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0027] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0029] like Figures 1 to 6 As shown in the figure, this specification provides a thermoplastic machine for uniform heating, used to process plastic boxes, including a feeding device 1, a conveying track 2, a heating device 3, a forming device 4, a traction device 5, and a control system. The feeding device 1 is used to feed sheet material onto the conveying track 2. The feeding device 1 adopts a mechanism commonly used in the art for feeding rolled sheet material. The conveying track 2 includes two track rods, the spacing of which is adapted to the width of the sheet material. The track rods pass through the heating device 3 and the forming device 4 in sequence.

[0030] Importantly, the heating device 3 includes two parallel fixed frames 30 arranged vertically. Each of the facing end faces of the two fixed frames 30 is provided with at least one transverse heating zone 31 and at least one longitudinal heating zone 32. This arrangement allows for simultaneous heating of the sheet material from multiple directions, ensuring more uniform heating and improving the quality and appearance of the molded product. In particular, traditional thermoforming machines often have poor heating effects on the splicing area between adjacent heated tiles; this heating device can effectively heat this splicing area.

[0031] It is understandable that the structure of the transverse heating zone 31 and the longitudinal heating zone 32 can be as follows:

[0032] In some embodiments, the fixing frame 30 is provided with a transverse heating zone 31 and a longitudinal heating zone 32, wherein the transverse heating zone 31 is located at one end near the feeding device 1, and the longitudinal heating zone 32 is located at one end near the forming device 4.

[0033] In some embodiments, the fixed frame 30 is provided with a horizontal heating zone 31 and two vertical heating zones 32, wherein the horizontal heating zone 31 is located between the two vertical heating zones 32.

[0034] In some embodiments, the fixed frame 30 is provided with two horizontal heating zones 31 and one vertical heating zone 32, wherein the vertical heating zone 32 is located between the two horizontal heating zones 31.

[0035] It should be understood that the above-mentioned structure is not the only one that can be used.

[0036] like Figure 2 As shown, the transverse heating zone 31 is provided with a plurality of first heating tile groups 310 arranged along the sheet conveying direction. The plurality of first heating tile groups 310 are arranged side by side in a direction perpendicular to the sheet conveying direction. The longitudinal heating zone 32 is provided with a plurality of second heating tile groups 320 arranged in a direction perpendicular to the sheet conveying direction. The plurality of second heating tile groups 320 are arranged side by side in the sheet conveying direction. The first heating tile groups 310 and the second heating tile groups 320 are spliced ​​together using the same heating tile units. In this way, only one type of heating tile unit is needed to form heating modules with various layouts, reducing production costs and maintenance and replacement costs.

[0037] The forming device 4 is used to form the sheet material into a box. Depending on the box body, the forming device 4 includes one or more forming mechanisms. Multiple forming mechanisms mean that multiple steps are required for forming, such as first forming the box body, then forming the edge of the box body, and finally cutting the edge of the box body. Generally, the forming mechanism is equipped with a detachable forming mold, which can be changed according to different box bodies. The forming mold is preferably one that produces multiple shapes. For example, the applicant's earlier patent application with publication number CN218314793U discloses a plastic container forming mold frame.

[0038] The traction device 5 is used to pull the sheet along the conveying track 2 through each heating zone and forming device 4, and it includes a receiving roller and a corresponding drive mechanism.

[0039] In some embodiments, such as Figure 2 and Figure 4 As shown, the heating device 3 also includes a translation mechanism 33, which includes a first moving frame 330 and a first driver. The first moving frame 330 is slidably arranged along the sheet conveying direction, and the first driver is used to drive the first moving frame 330 to move. The fixed frame 30 moves with the first moving frame 330. Since different sizes of forming molds are changed in the forming mechanism, the distance between the heating device and the forming mold is uncontrollable. Thus, the translation mechanism 33 can bring the heating area as close to the forming mold as possible, ensuring that the heated sheet enters the forming mold immediately.

[0040] Furthermore, the heating device 3 also includes an ejection mechanism 34, which includes a second movable frame 340 and a second driver. The second movable frame 340 is slidably disposed on the first movable frame 330 in a direction perpendicular to the sheet conveying direction. The second driver is used to drive the second movable frame 340 to move. The first movable frame 330 moves with the second movable frame 340. In this way, when the thermoplastic machine stops, the fixed frame 30 can be ejected to facilitate the repair and maintenance of the heating tile unit on it.

[0041] It should be understood that the heating device 3 can be an electric heating type or a circulating medium type, such as water or oil as the medium. The specific structure of such devices should be well known to those skilled in the art.

[0042] Furthermore, the sliding arrangement of the first movable frame 330 and the second movable frame 340 can be ensured by using a guide rail and slider structure to ensure smooth movement.

[0043] In some embodiments, a conveyor table 35 is provided at one end of the heating device 3 near the feeding device 1. The conveyor table 35 is provided with a receiving roller 36, a first fixed shaft 37, and a second fixed shaft 38. The receiving roller 36 is rotatably disposed at the end of the conveyor table 35 near the feeding device 1. The first fixed shaft 37 and the second fixed shaft 38 are spaced apart on the conveyor table 35. A plurality of first pressure rollers 370 are rotatably disposed on the first fixed shaft 37, and a plurality of second pressure rollers 380 are disposed on the second fixed shaft 38, offset from the first pressure rollers 370. Figure 5 As shown, two first pressure rollers 370 are spaced apart on the first fixed shaft 37, and three second pressure rollers 380 are spaced apart on the second fixed shaft 38. The first pressure roller 370 is located between the two second pressure rollers 380. When the sheet is conveyed between the conveyor table 35 and the first pressure rollers 370 and the second pressure rollers 380, the sheet can be flattened first.

[0044] Secondly, it also includes two heating frames 6 and a third driver 7 for driving the corresponding heating frames 6 to rotate. The conveyor 35 is provided with a third fixed shaft 8 at one end near the heating device 3. The two heating frames 6 are respectively rotatably arranged at both ends of the third fixed shaft 8. The heating tile unit is provided on the heating frame 6. The heating frame 6 is used to heat the edge of the sheet. Since the heating zones in the heating device 3 cannot fully heat the edge of the sheet, the edge of the sheet is preheated by the two heating frames 6. The structure of the first pressure roller 370 and the second pressure roller 380 used above will not hinder the heating.

[0045] Furthermore, such as Figure 6As shown, threaded rods 9 are provided at both ends of the first fixed shaft 37 and the second fixed shaft 38. Vertical adjustment holes 10 are provided on the conveying table 35 corresponding to each threaded rod 9. A fixing nut is provided on the threaded rod 9. In this way, the conveying gap between the conveying table 35 and the first pressure roller 370 and the second pressure roller 380 can be adjusted to adapt to sheets of different thicknesses.

[0046] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0047] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0048] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A thermoplasticizer with uniform heating for processing plastic boxes, characterized in that, The system includes a feeding device, a conveying track, a heating device, a forming device, a traction device, and a control system. The feeding device is used to feed the sheet material onto the conveying track. The heating device includes two fixed frames arranged parallel to each other. Each of the two fixed frames has at least one transverse heating zone and at least one longitudinal heating zone on its facing end faces. The transverse heating zone contains several first heating tile groups arranged along the sheet material conveying direction, and the several first heating tile groups are arranged side by side in a direction perpendicular to the sheet material conveying direction. The longitudinal heating zone contains several second heating tile groups arranged perpendicular to the sheet material conveying direction, and the several second heating tile groups are arranged side by side in the sheet material conveying direction. The forming device is used to form the sheet material into a box. The traction device is used to traction the sheet material along the conveying track through the heating zones and the forming device.

2. The thermoplasticizer with uniform heating according to claim 1, characterized in that, The fixed frame is provided with a horizontal heating zone and a vertical heating zone, wherein the horizontal heating zone is located at one end near the feeding device and the vertical heating zone is located at one end near the forming device.

3. The thermoplasticizer with uniform heating according to claim 1, characterized in that, The fixed frame is provided with a horizontal heating zone and two vertical heating zones, wherein the horizontal heating zone is located between the two vertical heating zones.

4. The thermoplasticizer with uniform heating according to claim 1, characterized in that, The fixed frame is provided with two horizontal heating zones and one vertical heating zone, wherein the vertical heating zone is located between the two horizontal heating zones.

5. A thermoplasticizer with uniform heating according to claim 1, characterized in that, The heating device further includes a translation mechanism, which includes a first movable frame and a first driver. The first movable frame is slidably disposed along the sheet conveying direction, and the first driver is used to drive the first movable frame to move. The fixed frame follows the first movable frame to move.

6. The thermoplasticizer with uniform heating according to claim 5, characterized in that, The heating device further includes an ejection mechanism, which includes a second movable frame and a second driver. The second movable frame is slidably disposed on the first movable frame in a direction perpendicular to the sheet conveying direction. The second driver is used to drive the second movable frame to move, and the first movable frame follows the second movable frame.

7. A thermoplasticizer with uniform heating according to claim 1, characterized in that, The first heating tile group and the second heating tile group are assembled from the same heating tile units.

8. A thermoplasticizer with uniform heating according to claim 1, characterized in that, A conveyor platform is provided at one end of the heating device near the feeding device. A receiving roller, a first fixed shaft, and a second fixed shaft are provided on the conveyor platform. The receiving roller is rotatably located at one end of the conveyor platform near the feeding device. The first fixed shaft and the second fixed shaft are spaced apart on the conveyor platform. A plurality of first pressure rollers are rotatably mounted on the first fixed shaft. A plurality of second pressure rollers are mounted on the second fixed shaft at a offset from the first pressure rollers. The sheet material is conveyed between the conveyor platform and the first and second pressure rollers.

9. A thermoplasticizer with uniform heating according to claim 8, characterized in that, It also includes two heating frames and a third driver for driving the corresponding heating frames to rotate. The conveyor table is provided with a third fixed shaft at one end near the heating device. The two heating frames are respectively rotatably disposed at both ends of the third fixed shaft. The heating frames are used to heat the edges of the sheet.

10. A thermoplasticizer with uniform heating according to claim 8, characterized in that, Both ends of the first fixed shaft and the second fixed shaft are provided with threaded rods, and the conveying platform is provided with vertical adjustment holes corresponding to each threaded rod, and a fixing nut is provided on the threaded rod.

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