SPC micro-foaming plate shaping pretreatment device and production line

Abstract

The utility model relates to an SPC micro-foaming board shaping pretreatment device and a production line, and the SPC micro-foaming board pre-shaping device comprises an upper roller group and a lower roller group which are oppositely arranged to pre-shape passing boards; the upper roller group and the lower roller group are communicated with a circulating cooling medium, so that the surface of a plate passing through the upper roller group and the lower roller group is quickly skinned; the distance between the upper roller set and the lower roller set is variable, and the minimum distance between the upper roller set and the lower roller set is larger than or equal to the final thickness of the plate. The method has the beneficial effects that before the SPC micro-foaming board base material enters the calender for final shaping and thickness determination, the surface of the SPC base material is quickly skinned, and foaming gas in the SPC base material is sealed in the board body, so that the situation that the uniformity of the surface of the board is reduced due to instability caused by the foaming gas in the subsequent shaping and thickness determination process of the calender is prevented; and the yield of the SPC micro-foamed sheet is improved.

Description

Technical Field

[0001] This utility model relates to the field of sheet production equipment technology, and in particular to an SPC micro-foamed sheet shaping pretreatment device and production line. Background Technology

[0002] SPC (Stone Plastic Composite) micro-foamed boards are composite boards made of materials such as stone powder (e.g., heavy calcium carbonate) and PVC (polyvinyl chloride). Through micro-foaming technology, this type of board not only maintains the excellent properties of SPC materials but also further enhances its lightweight, heat insulation, and sound insulation characteristics.

[0003] In the production of SPC micro-foamed sheets, the sheets are first extruded using an extruder, then calendered to a certain thickness and shape. Simultaneously, in the calender, the SPC micro-foamed sheets are heated, laminated with a PVC wear-resistant layer and PVC colored film, and embossed to create different finished sheets. Traditional sheet calenders, such as those described in patent document CN220681568U, use a first and second shaping block for rapid cooling and shaping. Because the steel plate is in direct contact with the foamed sheet, the temperature loss is significant, and the surface skin is thick, which is detrimental to subsequent heating, laminating, and embossing processes. Therefore, this technology has been gradually phased out in the production of SPC micro-foamed finished sheets. Meanwhile, in order to ensure the heating, bonding, and embossing effects, the calender generally maintains a high temperature during the thickness determination step. If the SPC micro-foamed board extruded directly from the extruder is then passed through the calender for thickness determination, the board's state will not be stable enough. This will cause foaming gas to overflow from the board surface during the thickness determination process, resulting in uneven board surface after thickness determination and affecting product yield.

[0004] The above problems urgently need to be addressed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an SPC micro-foamed board shaping pretreatment device and production line, which solves the technical problem that the surface quality of the substrate needs to be improved in the existing SPC micro-foamed board shaping process.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] In a first aspect, this utility model provides an SPC micro-foamed board shaping pretreatment device, including an upper roller group and a lower roller group arranged opposite to each other to pre-shape the board passing through; the upper roller group and the lower roller group are connected to a circulating cooling medium to quickly form a skin on the surface of the board passing through; the distance between the upper roller group and the lower roller group is variable and the minimum distance between the upper roller group and the lower roller group is greater than or equal to the final thickness of the board.

[0010] Optionally, in the SPC micro-foamed board shaping pretreatment device, the upper roller group and the lower roller group each include at least one horizontally arranged roller body. The roller bodies of the upper roller group and the lower roller group are aligned vertically and rotate to contact the upper and lower surfaces of the board at a predetermined linear speed and a predetermined temperature.

[0011] Optionally, in the SPC micro-foamed board shaping pretreatment device, the upper roller group and the lower roller group are each provided with two roller bodies arranged side by side and spaced apart. The first end of each roller body is connected to a rotation drive unit, and the rotation drive unit independently drives the roller body to rotate. The diameter of the roller body is 180-240mm, and the predetermined linear speed is 0.8-1.5m / min.

[0012] Optionally, in the SPC micro-foamed board shaping pretreatment device, the cooling medium is water, and the surface temperature of the roller is 5-10℃.

[0013] Optionally, the SPC micro-foamed board shaping pretreatment device further includes a lifting mechanism located above the upper roller group, which can drive the upper roller group to rise and fall.

[0014] Optionally, in the SPC micro-foamed board shaping pretreatment device, the lifting mechanism includes two lifting drive units, each corresponding to one of the two rollers of the upper roller group; the lifting drive units drive the two ends of the rollers to move vertically and synchronously.

[0015] Optionally, the SPC micro-foamed board shaping and pretreatment device further includes a guide roller group;

[0016] The guide roller group is horizontally positioned upstream of the lower roller group, and the upper surface of the guide roller group is flush with the upper surface of the lower roller group, for conveying the SPC micro-foamed board substrate to the lower roller group.

[0017] Optionally, in the SPC micro-foamed board shaping and pretreatment device, the guide roller group includes a plurality of guide rollers arranged in parallel and spaced apart, the guide rollers being parallel to the roller body.

[0018] Secondly, this utility model provides an SPC micro-foamed board production line, including an extrusion device, the SPC micro-foamed board shaping and pretreatment device described in the first aspect, and a calendering device arranged sequentially along the board conveying direction.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this utility model are as follows: This utility model provides a pre-treatment device and production line for SPC micro-foamed board shaping. The pre-treatment device uses an upper and lower roller assembly to contact the SPC micro-foamed board substrate (already pre-shaped) extruded from the extruder in a rolling contact manner. Simultaneously, a circulating cooling medium flows through the rollers, providing instantaneous low-temperature cooling to the surface of the SPC substrate. This facilitates rapid skin formation on the SPC substrate surface and helps maintain the board temperature. Specifically, before the SPC micro-foamed board substrate enters the calender for final shaping and thickness determination, rapid skin formation on the SPC substrate surface seals the foaming gas inside the board, preventing instability caused by the foaming gas during subsequent calendering and thickness determination processes from reducing the uniformity of the board surface and improving the yield of the SPC micro-foamed board. Furthermore, the brief contact between the roller assembly and the board helps maintain the board temperature, facilitating subsequent heating, bonding, and embossing processes. The pre-treatment skin seals the foaming gas inside the SPC substrate within the board, thus reducing the board's density and specific gravity. Compared to existing technologies, this improves the product quality of SPC micro-foamed composite boards, reduces board weight, and facilitates transportation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of an SPC micro-foamed board shaping pretreatment device and production line of the present invention;

[0022] Figure 2 for Figure 1 Another perspective 3D diagram.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1: Frame; 2: Upper roller assembly; 21: Roller body; 3: Lower roller assembly; 4: Rotation drive unit; 5: Rotary joint; 6: Lifting mechanism; 61: Lifting drive unit; 611: Synchronous connecting rod; 7: Guide roller assembly; 71: Guide roller. Detailed Implementation

[0025] This invention presents a pre-treatment device and production line for SPC microfoamed board shaping, addressing the technical problem of insufficient surface quality improvement in the existing SPC microfoamed board shaping process. The pre-treatment device utilizes an upper and lower roller assembly to contact the SPC microfoamed board substrate (already pre-shaped) extruded from the extruder in a rolling contact manner. Simultaneously, a circulating cooling medium circulates within the rollers, providing instantaneous low-temperature cooling to the SPC substrate surface. This facilitates rapid surface skinning and helps maintain the board's temperature. Specifically, before the SPC microfoamed board substrate enters the calender for final shaping and thickness determination, rapid surface skinning encapsulates the foaming gas within the board, preventing instability caused by the foaming gas during subsequent calendering and thickness determination, thus reducing the surface uniformity and improving the yield of the SPC microfoamed board. Furthermore, the brief contact between the roller assembly and the board helps maintain the board's temperature, facilitating subsequent heating, bonding, and embossing processes. The pre-treatment skin seals the foaming gas inside the SPC substrate within the board, thus reducing the board's density and specific gravity. Compared to existing technologies, this improves the product quality of SPC micro-foamed composite boards, reduces board weight, and facilitates transportation.

[0026] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0027] Example 1:

[0028] Reference Figure 1 and Figure 2This embodiment provides a pre-treatment device for shaping SPC micro-foamed board, including a frame 1, an upper roller group 2, and a lower roller group 3. The upper roller group 2 and the lower roller group 3 are arranged vertically opposite each other on the frame 1. The upper roller group 2 is movable, and the upper roller group 2 and the lower roller group 3 are used to pass through the SPC micro-foamed board substrate. Both the upper roller group 2 and the lower roller group 3 include at least one horizontally arranged roller body 21. The roller bodies 21 of the upper roller group 2 and the lower roller group 3 are aligned vertically one-to-one. A circulating cooling medium is passed through the roller body 21 to cool the surface of the roller body 21. After adjusting the distance between the upper roller group 2 and the lower roller group 3 by raising and lowering the upper roller group 2, the roller bodies 21 of the upper roller group 2 and the lower roller group 3 rotate at a specified linear speed and a specified temperature to contact the upper and lower surfaces of the SPC micro-foamed board substrate, so that the upper and lower surfaces of the SPC micro-foamed board substrate are cooled and skinned before entering the calendering device for shaping, and the thickness of the SPC micro-foamed board substrate is initially determined. The SPC micro-foamed board substrate mentioned here is mainly distinguished from the SPC micro-foamed board after it has been shaped.

[0029] Because the upper roller group 2 and the lower roller group 3 work together to contact the SPC micro-foamed board substrate rotating out of the extruder die in a rolling contact manner, and at the same time, the roller body 21 is filled with a circulating cooling medium to instantly cool the surface of the SPC substrate at a low temperature, which is conducive to the rapid skin formation on the surface of the SPC substrate. That is, before the SPC micro-foamed board substrate enters the calender for final shaping and thickness determination, the surface of the SPC substrate is rapidly skinned, which prevents the instability caused by foaming gas during the subsequent shaping and thickness determination process of the calender from reducing the uniformity of the board surface and improving the yield of SPC micro-foamed boards. In addition, the pre-treatment skin formation seals the foaming gas inside the SPC substrate inside the board, thus reducing the board density and specific gravity. This improves the product quality of SPC micro-foamed composite boards, reduces the weight of the boards, and facilitates transportation.

[0030] Reference Figure 1 and Figure 2 This embodiment provides a pre-treatment device for shaping SPC micro-foamed boards. Both the upper roller group 2 and the lower roller group 3 have two rollers 21 arranged side-by-side with a gap between them. The first end of each roller 21 is connected to a rotation drive unit 4 mounted on a frame 1. The rotation drive unit 4 independently drives the roller 21 to rotate, ensuring sufficient driving force for each roller 21. The diameter of the roller 21 is 180-240mm. Using a smaller diameter roller 21 reduces the contact area with the SPC micro-foamed board substrate during rolling. With a specified linear speed of 0.8-1.5m / min for the roller 21, instantaneous contact with the SPC micro-foamed board substrate is achieved. Under the action of the cooling medium, the SPC micro-foamed board substrate instantly cools, forms a skin, and hardens, sealing the foamed gas inside the board.

[0031] In addition, the pretreatment device makes instantaneous contact with the substrate, which reduces the heat loss of the SPC substrate during the cooling and skinning process. This is beneficial to the subsequent heating and bonding of the SPC substrate with the PVC wear-resistant layer and PVC color film, and simultaneously improves the bonding efficiency and quality between the SPC substrate and the film layer.

[0032] Reference Figure 1 and Figure 2 This embodiment provides a pre-treatment device for shaping SPC micro-foamed boards. The roller body 21 is hollow, with an input pipeline for cooling medium connected to one end face via a rotary joint 5, and an output pipeline for cooling medium connected to the other end face via a rotary joint 5, allowing the cooling medium to circulate within the roller body 21. To ensure cooling temperature, a 5°C cooling medium is circulated and supplied by a 12P chiller and delivered into the roller body 21 to rapidly cool the surface of the board. The cooling medium entering the pipeline is 5°C cold water, and the surface temperature of the roller body 21 is 5-10°C.

[0033] Reference Figure 1 and Figure 2 This embodiment provides an SPC micro-foamed board shaping pretreatment device, which also includes a lifting mechanism 6 disposed on the frame 1 and located above the upper roller group 2. The lifting mechanism 6 can drive the upper roller group 2 to rise and fall, so as to adjust the distance between the upper and lower roller groups 3 to adapt to SPC micro-foamed boards of different thicknesses, and at the same time facilitate the initial thickness determination of the SPC micro-foamed board.

[0034] Reference Figure 1 and Figure 2 This embodiment provides a pre-treatment device for shaping SPC micro-foamed boards. The lifting mechanism 6 includes two lifting drive units 61, which correspond one-to-one with the two rollers 21 of the upper roller group 2. The lifting drive units 61 drive both ends of the rollers 21 to move vertically and synchronously along the frame 1. See details below. Figure 2 The lifting mechanism 6 includes a motor and a synchronous connecting rod 611. The motor drives the two ends of the roller 21 to lift synchronously through the synchronous connecting rod 611. The lifting drive unit 61 drives the corresponding roller 21 to lift and lower respectively. The upper and lower rollers 21 form a group. One group of rollers 21 can work, or both groups of rollers 21 can work simultaneously. When both groups of rollers 21 work simultaneously, the distance between each group of rollers 21 is equal, and the two groups work together to achieve a better skinning effect. If the process requires the preparation of a plate with a thinner skin, one group of rollers 21 can be selected to work, and the upper roller 21 in the other group of rollers 21 can be lifted by the lifting drive unit 61 to detach from the plate being passed. This forms a state in which one group of rollers 21 works, and the pretreatment device can achieve a flexible and multi-purpose state.

[0035] Reference Figure 1 and Figure 2This embodiment provides a pre-treatment device for shaping SPC micro-foamed boards, which also includes a group of guide rollers 71. The group of guide rollers 71 is horizontally arranged upstream of the lower roller group 3, and the upper surface of the group of guide rollers 71 is flush with the upper surface of the lower roller group 3, for horizontally conveying the SPC micro-foamed board substrate to the lower roller group 3. Specifically, the group of guide rollers 71 includes a plurality of guide rollers 71 arranged in parallel and spaced apart, and the guide rollers 71 are parallel to the roller body 21.

[0036] Example 2:

[0037] This embodiment provides an SPC microfoamed board production line, comprising an extrusion device, an SPC microfoamed board shaping and pretreatment device (as described in Embodiment 1), and a calendering device arranged sequentially along the board conveying direction. The board conveying direction refers to the direction in which the board is conveyed on the production line. The calendering device can simultaneously complete the thickness determination of the SPC microfoamed board, as well as heating, bonding, and embossing steps on the board surface, as detailed in the prior art. A pre-shaping device is installed before the calendering device in the SPC microfoamed board production line. Before the thickness determination by the calendering device, a skinning treatment is performed on the board to ensure the surface quality of the board during the thickness determination step, thereby improving the overall yield of the final board product.

[0038] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pre-treatment device for shaping SPC micro-foamed boards, characterized in that, It includes an upper roller group (2) and a lower roller group (3) that are arranged relative to each other to pre-shape the passing sheet material. The upper roller group (2) and the lower roller group (3) are connected to a circulating cooling medium so that the surface of the passing plate can quickly form a skin; The spacing between the upper roller group (2) and the lower roller group (3) is variable, and the minimum spacing between the upper roller group (2) and the lower roller group (3) is greater than or equal to the final thickness of the plate.

2. The SPC micro-foamed board shaping and pretreatment device as described in claim 1, characterized in that, The upper roller group (2) and the lower roller group (3) each include at least one horizontally arranged roller body (21). The roller body (21) of the upper roller group (2) and the roller body (21) of the lower roller group (3) are aligned vertically and rotate to contact the upper and lower surfaces of the plate at a predetermined linear speed and a predetermined temperature.

3. The SPC micro-foamed board shaping and pretreatment device as described in claim 2, characterized in that, The upper roller group (2) and the lower roller group (3) are arranged side by side and spaced apart by two roller bodies (21). The first end of each roller body (21) is connected to a rotation drive unit (4), and the rotation drive unit (4) independently drives the roller body (21) to rotate. The diameter of the roller (21) is 180-240 mm, and the predetermined linear speed is 0.8-1.5 m / min.

4. The SPC micro-foamed board shaping and pretreatment device as described in claim 2, characterized in that, The cooling medium is water, and the surface temperature of the roller (21) is 5-10℃.

5. The SPC micro-foamed board shaping and pretreatment device as described in claim 2, characterized in that, It also includes a lifting mechanism (6) located above the upper roller group (2), which can drive the upper roller group (2) to rise and fall.

6. The SPC micro-foamed board shaping and pretreatment device as described in claim 5, characterized in that, The lifting mechanism (6) includes two lifting drive units (61), and the two lifting drive units (61) correspond one-to-one with the two roller bodies (21) of the upper roller group (2); The lifting drive unit (61) drives the two ends of the roller (21) to move vertically and vertically in sync.

7. The SPC micro-foamed board shaping and pretreatment device as described in claim 2, characterized in that, It also includes guide roller assembly (7); The guide roller group (7) is horizontally positioned upstream of the lower roller group (3), and the upper surface of the guide roller group (7) is flush with the upper surface of the lower roller group (3) for conveying the SPC micro-foamed board substrate to the lower roller group (3).

8. The SPC micro-foamed board shaping and pretreatment device as described in claim 7, characterized in that, The guide roller group (7) includes a plurality of guide rollers (71) arranged in parallel and spaced apart, the guide rollers (71) being parallel to the roller body (21).

9. A production line for SPC micro-foamed boards, characterized in that, The device includes an extrusion unit arranged sequentially along the conveying direction of the sheet material, a pre-treatment device for shaping SPC micro-foamed sheet material as described in any one of claims 1-8, and a calendering unit.

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