Environmentally friendly plastic hot pressing molding device

Abstract

The present invention relates to the technical field of bubble film processing, and discloses an environmentally friendly plastic hot pressing forming device, including a forming frame, wherein a plurality of transmission rollers for guiding the movement of a film are rotatably installed in the forming frame, a hot pressing assembly for hot pressing two layers of film is also installed inside the forming frame, and a guide roller for guiding the film to fit the hot pressing assembly is also provided on the outside of the hot pressing assembly; the hot pressing assembly includes two groups of hot pressing cylinders arranged up and down, and the outsides of the two groups of hot pressing cylinders are provided with forming holes for forming the film, and the inside of the hot pressing cylinder is also provided with a plurality of groups of inner heating layers 1 and 2 for heating, and the inner heating layers 1 and 2 heat the film and the film bubble forming position respectively. The present invention heats the bubble film before forming, and the bubble forming position is also heated at the same time, so that the film has good deformation ability, and the bubble film is prevented from being broken or of poor quality.

Description

Technical Field

[0001] The invention relates to the technical field of bubble film processing, in particular to an environmentally friendly plastic hot pressing molding device. Background Art

[0002] Environmentally friendly bubble film is an important cushioning packaging material. It is mainly made of recyclable and degradable plastic raw materials such as polyethylene (PE). These raw materials are specially treated during the production process to reduce pollution to the environment and can be naturally decomposed or recycled after being discarded. The processing process is to feed the molten plastic into the film forming equipment, make a film through extrusion and expansion, and roll it on a vacuum forming roller with a round hole. There are multiple small holes in the round hole on the vacuum forming roller connected to the machine for extracting air. When the film passes through the vacuum forming roller, countless bubbles will be sucked out on the film. After these bubbles are formed, they are bonded with another layer of heated film to form a double-layer bubble film. The formed bubble film is cut and divided into different widths according to needs, and the excess part is cut off to complete the processing.

[0003] Based on the above processing, when the bubble film passes through the small hole on the vacuum forming roller, the position where the bubble is formed does not contact the vacuum forming roller, so it is difficult for the vacuum forming roller to heat the position where the bubble of the film is formed. The difficulty of stretching the cooled film will increase. Under different environments, the position where the bubble of the film is formed will break or it will be difficult to form bubbles. Therefore, the position where the bubble of the film is formed also needs to be heated. Summary of the invention

[0004] The object of the present invention is to provide an environmentally friendly plastic hot pressing molding device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an environmentally friendly plastic hot pressing molding device, comprising a molding frame, wherein a plurality of transmission rollers for guiding the movement of a film are rotatably installed in the molding frame, a hot pressing assembly for hot pressing two layers of film is also installed inside the molding frame, and a guide roller for guiding the film to fit the hot pressing assembly is also provided outside the hot pressing assembly;

[0006] The hot pressing assembly includes two groups of hot pressing cylinders arranged up and down, and the outer sides of the two groups of hot pressing cylinders are provided with forming holes for forming the film. The interior of the hot pressing cylinders is also provided with multiple groups of inner heating layer 1 and inner heating layer 2 for heating. The inner heating layer 1 and inner heating layer 2 heat the film and the film bubble forming position respectively.

[0007] Furthermore, multiple groups of the inner heating layer 1 are distributed in a circular shape and are attached to the inside of the hot pressing cylinder, and multiple groups of the inner heating layer 2 are also attached to the inner wall of the hot pressing cylinder. The inner heating layer 1 and the inner heating layer 2 are distributed at intervals. The inner heating layer 1 is in an "I" shape. The inner heating layer 2 is clamped between the inner heating layer 1 on both sides. The inner heating layer 2 can slide along the inner heating layer 1 to heat and shape the film bubble forming area.

[0008] Furthermore, the outer side of the second inner heating layer is formed with arranged bubble forming grooves, and the inner side of the bubble forming groove is provided with an air inlet hole which is arranged through the groove. The air inlet hole produces an inward suction effect to form the film bubbles. When the film bubbles are formed, the bubble forming groove corresponds to the forming hole. When the film bubble forming part is heated, the bubble forming groove and the forming hole are staggered.

[0009] Furthermore, the inner side of the second inner heating layer is provided with a plurality of bubble heating components spaced apart from the bubble forming grooves, the bubble heating components include an inner heating layer for heating, the inner side of the second inner heating layer is provided with a circular hole extending outward, the inner heating layer is embedded in the circular hole, the inner heating layer is used to heat the bubble forming part of the film, the inner side of the inner heating layer is provided with a connecting wire connected to the second inner heating layer, the inner side of the inner heating layer is also fixed with an inner spring, the inner side of the second inner heating layer is fixed with a U-shaped frame, the U-shaped frame is used to support the inner spring, when the inner heating layer heats the bubble forming part of the film, the inner heating layer extends into the forming hole, on the contrary, when the inner heating layer does not heat the bubble forming part of the film, the inner heating layer is attached to the inner side of the hot pressing cylinder.

[0010] Furthermore, the outer edge of the inner heat layer has a chamfer, and when the inner heat layer moves out of the forming hole, the chamfer can contact the edge of the forming hole.

[0011] Furthermore, both ends of the second inner heating layer are fixed with extended edges, the inner edge of the extended edge on one side has a chamfer, and a support spring that is pressed against the inner wall of the hot pressing cylinder is fixed on the outer side of the extended edge;

[0012] A blocking shaft is provided at one end of the hot pressing cylinder, and the blocking shaft is fixed to the forming frame and extends to the inside of the hot pressing cylinder. An outer plate 1 is fixed to the outer wall of the blocking shaft, and an outer plate 2 is fixed to the outer side of the outer plate 1. The outer plate 2 is used to be extruded with the extended edge on one side, and one side of the outer plate 2 is arranged with an inclined surface, and the inclined surface of the outer plate 2 is used to be extruded with the extended edge on one side, so that the support spring is compressed and the inner heating layer 2 is translated.

[0013] Furthermore, the blocking shaft is used to block one end of the hot pressing cylinder, and the other end of the hot pressing cylinder is connected to an air pump for forming film bubbles.

[0014] Furthermore, a gear box is installed at the other end of the two groups of hot pressing cylinders for driving the two groups of hot pressing cylinders to rotate at the same frequency and in opposite directions. A servo motor is fixed outside the gear box, and the servo motor is used to drive the gear box to work.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] 1. Heat the bubble film before forming, and the position where the bubble is formed is also heated to make the film deformable well and avoid rupture or poor quality of the bubble film.

[0017] 2. During the rotation of the two sets of heat pressing cylinders, the two films are automatically extruded and formed to realize a driven film movement. When the film contacts the heat pressing cylinder, there is an inner heat layer in the forming hole of the heat pressing cylinder, so that the positions of the film bubbles and the positions without bubbles can be heated, which is convenient for the film to stretch and form.

[0018] 3. The second inner heating layer is in automatic operation and automatically generates reciprocating motion, so that the film is heated and then stretched, improving quality and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the hot pressing assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the hot pressing cylinder of the present invention;

[0024] Figure 5 The present invention Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part;

[0025] Figure 6 This is a schematic diagram of the second separation structure of the inner heating layer of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the two ends of the inner heating layer of the present invention;

[0027] Figure 8 It is a schematic diagram of the blocking shaft structure of the present invention.

[0028] In the figure: 1. forming frame; 2. transmission roller; 3. guide roller; 4. hot pressing assembly; 41. hot pressing cylinder; 411. forming hole; 42. inner heating layer one; 43. inner heating layer two; 431. bubble forming groove; 432. air inlet; 44. bubble heating assembly; 441. round hole; 442. inner heating layer; 443. connecting wire; 444. U-shaped frame; 445. inner spring; 45. extension edge; 46. support spring; 47. blocking shaft; 471. outer plate one; 472. outer plate two; 48. gear box; 49. servo motor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 The present invention provides a technical solution: when the bubble film passes through the small hole on the vacuum forming roller, the bubble forming position does not contact the vacuum forming roller, so it is difficult for the vacuum forming roller to heat the bubble forming position of the film, which will cause the bubble forming position of the film to rupture or make it difficult to form bubbles. An environmentally friendly plastic hot pressing molding device is proposed, such as Figure 1 As shown, it includes a forming frame 1, in which a plurality of transmission rollers 2 for guiding the movement of the film are rotatably installed, and a hot pressing assembly 4 for hot pressing two layers of film is also installed inside the forming frame 1, and a guide roller 3 for guiding the film to fit the hot pressing assembly 4 is also arranged outside the hot pressing assembly 4, and the hot pressing assembly 4 is used to extrude the film to merge the two films, such as Figure 2 The figure shows the state of film transmission. Two films are transmitted through the hot pressing assembly 4 to form one film. The two films are heated and pressed at the same time by the hot pressing assembly 4, so that the positions of the films at different positions remain the same.

[0031] like Figure 3 As shown, the hot pressing assembly 4 includes two groups of hot pressing cylinders 41 arranged vertically, and the outer sides of the two groups of hot pressing cylinders 41 are provided with forming holes 411 for forming the film. The interior of the hot pressing cylinder 41 is also provided with multiple groups of inner heating layers 1 42 and inner heating layers 2 43 for heating. The inner heating layers 1 42 and 43 heat the film and the film bubble forming position respectively, wherein the inner heating layer 2 43 can slide to change its position in coordination with the hot pressing cylinder 41, so that the hot pressing cylinder 41 and the inner heating layer 2 43 heat the entire film, the inner heating layer 1 42 is used to heat the hot pressing cylinder 41, and the inner heating layer 2 43 is used to heat the film bubble forming position.

[0032] like Figure 3 As shown, multiple groups of inner heating layer one 42 are distributed in a circular manner and are attached to the inside of the hot pressing cylinder 41, and multiple groups of inner heating layer two 43 are also attached to the inner wall of the hot pressing cylinder 41. The inner heating layer one 42 and the inner heating layer two 43 are distributed at intervals. The inner heating layer one 42 is in an "I" shape. The inner heating layer two 43 is clamped between the inner heating layers one 42 on both sides. The inner heating layer two 43 can slide along the inner heating layer one 42 to heat and shape the film bubble forming area. The inner heating layer one 42 is used to heat the hot pressing cylinder 41, and also to limit the inner heating layer two 43 so that the inner heating layer two 43 can reciprocate.

[0033] like Figure 4 and Figure 5 As shown, the outer side of the second inner heating layer 43 is formed with arranged bubble forming grooves 431, and the inner side of the bubble forming grooves 431 is provided with air inlet holes 432 which are arranged through the grooves. The air inlet holes 432 produce the effect of inward suction to form the film bubbles. When the film bubbles are formed, the bubble forming grooves 431 correspond to the forming holes 411. When the film bubble forming part is heated, the bubble forming grooves 431 are staggered with the forming holes 411. In the process of film bubble forming, the forming holes 411 cooperate with the bubble forming grooves 431, so that the film can be affected by the negative pressure, move into the forming holes 411, and fit against the inner wall of the bubble forming grooves 431.

[0034] like Figure 5 As shown, the inner side of the second inner heating layer 43 is provided with a plurality of bubble heating components 44 spaced apart from the bubble forming grooves 431, the bubble heating components 44 include an inner heating layer 442 for heating, a circular hole 441 extending outward is provided on the inner side of the second inner heating layer 43, the inner heating layer 442 is embedded in the circular hole 441, the inner heating layer 442 is used to heat the bubble forming part of the film, a connecting wire 443 connected to the second inner heating layer 43 is provided on the inner side of the inner heating layer 442, and an inner Spring 445, a U-shaped frame 444 is fixed on the inner side of the inner heating layer 43, and the U-shaped frame 444 is used to extend the inner spring 445 into the forming hole 411 when the inner heating layer 442 heats the film bubble forming part, on the contrary, when the inner heating layer 442 does not heat the film bubble forming part, the inner heating layer 442 is attached to the inner side of the hot pressing cylinder 41, and when the film is heated, the bubble heating component 44 corresponds to the forming hole 411, and when the film bubble is formed, the bubble forming groove 431 corresponds to the forming hole 411.

[0035] like Figure 6As shown, in order to enable the inner heat layer 442 to move into the forming hole 411 and also to move out of the forming hole 411, the outer edge of the inner heat layer 442 has a chamfer. When the inner heat layer 442 moves out of the forming hole 411, the chamfer can contact the edge of the forming hole 411, so that the chamfer of the edge of the inner heat layer 442 cooperates with the edge of the forming hole 411, and can smoothly detach from the forming hole 411 when the inner heat layer 442 moves laterally.

[0036] like Figure 7 As shown, both ends of the inner heating layer 43 are fixed with extension edges 45, the inner edge of the extension edge 45 on one side has a chamfer, and the outer side of the extension edge 45 is fixed with a support spring 46 that is pressed against the inner wall of the hot pressing cylinder 41;

[0037] A blocking shaft 47 is provided at one end of the hot pressing cylinder 41. The blocking shaft 47 is fixed to the forming frame 1 and extends to the inside of the hot pressing cylinder 41. An outer plate 1 471 is fixed to the outer wall of the blocking shaft 47. An outer plate 2 472 is fixed to the outer side of the outer plate 1 471. The outer plate 2 472 is used to be extruded with the extended edge 45 on one side. One side of the outer plate 2 472 is arranged in an inclined surface. The inclined surface of the outer plate 2 472 is used to be extruded with the extended edge 45 on one side, so that the support spring 46 is compressed and the inner heating layer 2 43 is translated. When the hot pressing cylinder 41 rotates, the chamfered extended edge 45 can contact the chamfered position with the inclined surface of the outer plate 2 472 and produce extrusion, so that the outer plate 2 472 pushes the extended edge 45, so that the support spring 46 is squeezed, and the position of the inner heating layer 2 43 is changed, so as to realize the replacement of the bubble heating component 44 and the bubble forming groove 431.

[0038] like Figure 3 As shown, the blocking shaft 47 is used to block one end of the hot pressing cylinder 41, and the other end of the hot pressing cylinder 41 is connected to the air pump for forming the film bubbles, and the gas moves inward from the hot pressing cylinder 41 to form the film bubbles.

[0039] like Figure 3 As shown, a gear box 48 is installed at the other end of the two groups of hot-press cylinders 41, which is used to drive the two groups of hot-press cylinders 41 to rotate at the same frequency and in opposite directions. A servo motor 49 is fixed outside the gear box 48. The servo motor 49 is used to drive the gear box 48 to work. During the operation of the servo motor 49, the two groups of hot-press cylinders 41 are driven to rotate in opposite directions and at the same frequency, so that the forming holes 411 of the two groups of hot-press cylinders 41 correspond to each other up and down, thereby realizing forming.

[0040] The working principle of the present invention is as follows: the film is transported by the transport roller 2, and the film is moved from top to bottom by the guide roller 3, and then bent 90 degrees and passed horizontally between two sets of hot pressing cylinders 41. The two sets of hot pressing cylinders 41 squeeze the two sheets of film to form a bubble film. The specific working process is as follows:

[0041] First, the forming holes 411 of the two sets of hot pressing cylinders 41 correspond to each other. After the two films are squeezed, the positions of the forming holes 411 are inwardly sucked, and the films are attached to the outer wall of the hot pressing cylinder 41. Then, the films are acted upon to move toward the inside of the forming holes 411. At the same time, the two films are squeezed and the bubble film is formed.

[0042] Secondly, when the film is bent 90 degrees and passes horizontally between the two groups of heat-press cylinders 41, when the film is in vertical contact with the heat-press cylinder 41, the heat-press cylinder 41 is also in a rotating process, and the second outer plate 472 is squeezed with the extension edge 45, so that the extension edge 45 moves along the inclined surface of the second outer plate 472, so that the support spring 46 is squeezed, and after the second inner heating layer 43 moves, the inner heating layer 442 corresponds to the forming hole 411, and the inner heating layer 442 extends into the forming hole 411 under the action of the inner spring 445, and at the same time, the inner heating layer 442 is in contact with the film. It should be noted that when the inner heating layer 442 is in contact with the film, the heat-press cylinder 41 is just in contact with the film, so as to avoid the forming holes 411 at other positions of the heat-press cylinder 41 from sucking air inward, which causes bubbles to form inward at the bubble formation location of the film without being heated;

[0043] Then the inner heating layer 43 is reset to make the bubble forming groove 431 correspond to the forming hole 411, so that the forming hole 411 absorbs air inward, the film is deformed, and fits inwardly with the inner wall of the bubble forming groove 431, and then is formed under the action of the hot pressing cylinder 41 of the two.

[0044] The bubble film is heated before forming, and the bubble forming position is also heated, so that the film has good deformation ability and avoids the bubble film from being broken or of poor quality. During the rotation of the two sets of hot pressing cylinders 41, the two pieces of film are automatically squeezed and formed, and the film movement is also driven. When the film contacts the hot pressing cylinder 41, the forming hole 411 of the hot pressing cylinder 41 has an inner heat layer 442, so that the film bubble position and the non-bubble position can be heated, which is convenient for the film to stretch and easy to form.

[0045] It should also be noted that the second inner heating layer 43 is in an automatic operation state, automatically generating reciprocating motion, so that the film is heated and then stretched, thereby improving quality and work efficiency.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An environmentally friendly plastic hot pressing molding device, comprising a molding frame (1), wherein a plurality of transmission rollers (2) for guiding the movement of a film are rotatably mounted in the molding frame (1), characterized in that: A hot pressing assembly (4) for hot pressing two layers of film is also installed inside the forming frame (1), and a guide roller (3) for guiding the film to fit the hot pressing assembly (4) is also provided outside the hot pressing assembly (4); The hot pressing assembly (4) comprises two groups of hot pressing cylinders (41) arranged vertically, the outer sides of the two groups of hot pressing cylinders (41) are provided with forming holes (411) for forming the film, and the inside of the hot pressing cylinders (41) is also provided with a plurality of groups of inner heating layers 1 (42) and inner heating layers 2 (43) for heating, and the inner heating layers 1 (42) and 2 (43) are used to heat the film and the film bubble forming part respectively; Multiple groups of the inner heating layer one (42) are distributed in a circular manner and are bonded to the inside of the hot pressing cylinder (41). Multiple groups of the inner heating layer two (43) are also bonded to the inner wall of the hot pressing cylinder (41). The inner heating layer one (42) and the inner heating layer two (43) are distributed at intervals. The inner heating layer one (42) is in an "I" shape. The inner heating layer two (43) is clamped between the inner heating layer one (42) on both sides. The inner heating layer two (43) can slide along the inner heating layer one (42) to heat and shape the film bubble forming area.

2. The environmentally friendly plastic hot pressing molding device according to claim 1 is characterized in that: The outer side of the second inner heating layer (43) is formed with arranged bubble forming grooves (431), and the inner side of the bubble forming grooves (431) is provided with air inlet holes (432) which are arranged through the grooves. The air inlet holes (432) produce an inward air suction effect to form thin film bubbles. When the thin film bubbles are formed, the bubble forming grooves (431) correspond to the forming holes (411). When the thin film bubble forming area is heated, the bubble forming grooves (431) are staggered with the forming holes (411).

3. The environmentally friendly plastic hot pressing molding device according to claim 2 is characterized in that: The inner side of the second inner heating layer (43) is provided with a plurality of bubble heating components (44) spaced apart from the bubble forming grooves (431), the bubble heating components (44) comprising an inner heating layer (442) for heating, the inner side of the second inner heating layer (43) is provided with a circular hole (441) extending outward, the inner heating layer (442) is embedded in the circular hole (441), the inner heating layer (442) is used to heat the bubble forming position of the film, the inner side of the inner heating layer (442) is provided with a bubble forming groove spaced apart from the second inner heating layer (431), the bubble heating components (44) comprising an inner heating layer (442) for heating, ) is connected to the inner heating layer (442), an inner spring (445) is fixed on the inner side of the inner heating layer (43), a U-shaped frame (444) is fixed on the inner side of the inner heating layer (43), and the U-shaped frame (444) is used to support the inner spring (445). When the inner heating layer (442) heats the film bubble forming part, the U-shaped frame (444) extends into the forming hole (411). On the contrary, when the inner heating layer (442) does not heat the film bubble forming part, the inner heating layer (442) is attached to the inner side of the hot pressing cylinder (41).

4. The environmentally friendly plastic hot pressing molding device according to claim 3 is characterized in that: The outer edge of the inner heat layer (442) has a chamfer, and when the inner heat layer (442) moves out of the forming hole (411), the chamfer can contact the edge of the forming hole (411).

5. The environmentally friendly plastic hot pressing molding device according to claim 3 is characterized in that: Both ends of the second inner heating layer (43) are fixed with extension edges (45), the inner edge of the extension edge (45) on one side has a chamfer, and a support spring (46) is fixed on the outer side of the extension edge (45) for pressing against the inner wall of the hot pressing cylinder (41); A blocking shaft (47) is provided at one end of the hot pressing cylinder (41). The blocking shaft (47) is fixed to the forming frame (1) and extends to the inside of the hot pressing cylinder (41). An outer plate 1 (471) is fixed to the outer wall of the blocking shaft (47). An outer plate 2 (472) is fixed to the outer side of the outer plate 1 (471). The outer plate 2 (472) is used to be pressed against the extended edge (45) on one side. One side of the outer plate 2 (472) is arranged in an inclined surface. The inclined surface of the outer plate 2 (472) is used to be pressed against the extended edge (45) on one side, so that the support spring (46) is compressed and the inner heating layer 2 (43) is translated.

6. The environmentally friendly plastic hot pressing molding device according to claim 5, characterized in that: The blocking shaft (47) is used to block one end of the hot pressing cylinder (41); the other end of the hot pressing cylinder (41) is connected to an air pump for forming thin film bubbles.

7. The environmentally friendly plastic hot pressing molding device according to claim 5, characterized in that: A gear box (48) is installed at the other end of the two groups of hot pressing cylinders (41) for driving the two groups of hot pressing cylinders (41) to rotate at the same frequency and in opposite directions. A servo motor (49) is fixed outside the gear box (48) and the servo motor (49) is used to drive the gear box (48) to work.

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