Stone-plastic floor laminating equipment and production process of stone-plastic floor

Abstract

The present invention discloses a film coating equipment for stone plastic floor, comprising: a frame; a film coating component and an embossing component are sequentially arranged on the frame along the processing direction of the plate; the film coating component films the plate surface from both sides to the middle; the embossing component embosses the film coated plate in a cold-in-cold-out manner. The film coating component films the plate from both sides to the middle or from the middle to both sides, and the embossing component embosses the film coated plate in a cold-in-cold-out hot pressing process. During cooling, the plate is gradually cooled from the middle to the surroundings, so that the middle of the sheet is cooled, tightened and shrunk first, so that the surroundings are warped upwards, and the surroundings of the sheet are hot-pressed by preheating to prevent the occurrence of layered and warped edges around the sheet due to uneven hot pressing around the sheet. The present invention also discloses a production process for stone plastic floor.

Description

Technical Field

[0001] The technical field involved in the present invention particularly relates to a stone plastic floor film laminating device and a production process of stone plastic floors. Background Art

[0002] The existing floor structure at least includes a base material layer and a decorative film on the surface. Most of the decorative films are laminated on the surface of the base material layer using thermosetting film materials. For the base material layer of stone plastic floors, PVC resin, calcium powder, etc. are mainly used as raw materials. The existing film lamination of stone plastic floors generally adopts a smooth roller film lamination structure. The smooth roller film lamination structure (such as CN106393933A, CN208646084U, etc.) is prone to the phenomenon of the decorative film feeding deviation during film lamination. Due to the existence of the deviation problem, the prior art adopts adding a deviation correction component at the corresponding position on the film laminator to correct the feeding position of the decorative film. For example, a surface film laminating device for the production of stone plastic floors disclosed in CN216914832U includes a support frame. A first film unwinding roller, a pressing wheel, a tensioning component, an auxiliary wheel, a pressing wheel, and a second film unwinding roller are sequentially arranged on the upper end of the support frame from left to right. The tensioning component includes a tensioning wheel and an integrating wheel arranged up and down. A limiting wheel is further arranged on one side of the integrating wheel. Deviation correction devices are arranged between the tensioning component and the auxiliary wheel and between the pressing wheel and the second film unwinding roller. A side pressing device is interspersed between the first film unwinding roller, the pressing wheel, and the tensioning component. This technology completes the effective pressing of the film on both corners of the stone plastic floor through the deviation correction device and the side pressing device, and can reasonably correct the deviation of the stone plastic floor at the same time. However, the side part of the sheet after extrusion of the sheet material cannot be effectively linearly guaranteed. Therefore, the film lamination effect on the surface of the sheet material cannot be guaranteed through the deviation correction device and the side pressing device. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the prior art. Therefore, a stone plastic floor film laminating device and a production process of stone plastic floors are proposed. The film laminating component completes the film lamination on the sheet material in a manner from both sides to the middle or from the middle to both sides. The embossing component performs an embossing treatment on the film-laminated sheet material through a hot pressing process with cold inlet and cold outlet. During cooling, the middle part of the sheet material is cooled and tightened and retracted first from the middle to the surrounding, so that the surrounding part warps upward, and the surrounding part of the sheet material is hot-pressed using preheating to prevent the occurrence of the phenomenon of uneven hot pressing and delamination and warping at the surrounding part of the sheet material.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A stone plastic floor film laminating device includes: a frame body;

[0006] A film laminating component and an embossing component are sequentially arranged on the frame body along the sheet material processing direction;

[0007] The film laminating assembly laminates the sheet on the surface of the sheet material in a way of laminating from both sides to the middle.

[0008] The embossing assembly embosses the laminated sheet material in a way of cold in and cold out.

[0009] The film laminating assembly laminates the sheet extruded and finished by the extruder. When laminating, the laminating is completed in a way of from both sides to the middle. By using this solution, the deviation of the decorative film feeding can be prevented, and the feeding position of the decorative film can always be ensured to be consistent. Laminating in a way of from both sides to the middle can overcome the technical prejudice that laminating from the middle to both sides in the past is prone to cause wrinkles. The bottom of the flexible horizontal seal divides the decorative film into two sections and provides a length guarantee for the subsequent decorative film to be laminated, which is convenient for the areas of the two sides during the subsequent middle laminating not to have length changes due to the subsequent middle lamination. Since the negative pressure structure lifts the middle decorative film in the two laminating areas, the air that is likely to exist during laminating is driven forward and overflows. Laminating in a way of from both sides to the middle can prevent the occurrence of wrinkles and overcome this technical prejudice.

[0010] By using a hot pressing process of cold in and cold out for embossing treatment, the laminated sheet is hot pressed and embossed by the hot pressing structure, and the hot pressed and embossed sheet material is gradually cooled from the middle to the periphery by the cooling structure, so that the middle of the sheet cools first, shrinks and retracts, and the periphery warps upward. The preheating is used to cooperate with the hot pressing structure above to perform secondary hot pressing on the periphery of the sheet to prevent the phenomenon of uneven hot pressing at the periphery of the sheet and resulting in delamination and warping at the periphery.

[0011] On the basis of the above embodiment, the following improvements are made. The film laminating assembly includes a first laminating area for laminating both ends of the front surface of the sheet material, and a second laminating area for laminating the middle of the front surface of the sheet material. The first laminating area laminates the decorative film on the sheet material prior to the second laminating area, and there is a lifting structure at the second laminating area for lifting the middle area of the decorative film.

[0012] On the basis of the above embodiment, the following improvements are made. The film laminating assembly includes a fixing structure installed on the frame body;

[0013] A flexible horizontal seal and a flexible film pressing member are fixedly installed on the fixing structure. The two ends of the flexible horizontal seal and the flexible film pressing member are hermetically attached and enclosed to form the first laminating area;

[0014] The middle of the flexible film pressing member bulges backward, and the middle of the flexible film pressing member and the flexible horizontal seal enclose to form the second laminating area;

[0015] The flexible film pressing member, the flexible horizontal seal and the decorative film enclose to form a lifting structure. A negative pressure structure is installed on the fixing structure at the lifting structure. Under working conditions, the negative pressure structure adsorbs and lifts the decorative film or expels air through the flexible film pressing member.

[0016] Based on the above embodiment, the following improvements are made: the embossing component includes a holding structure for holding the laminated plate, a hot pressing structure for cold-in and cold-out of the held plate, the holding structure is used to hold the laminated plate, and the hot pressing structure is used to perform hot-pressing texture processing on the top section of the held plate.

[0017] On the basis of the above embodiment, the following improvements are made, the hot pressing structure includes a hot pressing plate installed on one side of the frame and moving relative to the containing structure, the hot pressing plate is embedded with a heating structure for heating the plate and a cooling structure for sequentially shrinking the plate from the middle to the surrounding areas after hot pressing, and the cooling direction of the cooling structure after hot pressing is gradually cooled from the middle to the surrounding areas. During the cooling process, the plate will gradually shrink from the middle to the surrounding areas and drive the surrounding areas to warp up and then cooperate with the heating structure to complete further hot pressing.

[0018] The following improvement is made on the basis of the above embodiment: the containing structure includes a containing body installed on one side of the frame, and an auxiliary heating structure is provided on the side of the containing body.

[0019] Based on the above embodiment, the following improvement is made: the containing structure is rectangular and the height of the middle area is 1 to 2 mm higher than the height of the surrounding areas.

[0020] Based on the above embodiment, the following improvements are made, the laminating equipment also includes a cutting component arranged between the laminating component and the embossing component, a conveying component arranged between the output end of the extruder and the input end of the embossing component, and a transfer component that transfers the laminated plate to the holding structure for hot pressing treatment.

[0021] A production process of stone plastic flooring, using the film laminating equipment as described above, the process steps are as follows:

[0022] 1) Extrusion molding: The mixed raw materials are melt-mixed by an extruder and extruded through a mold, and then polished by multiple groups of polishing rollers to obtain a surface-smoothed sheet;

[0023] 2) Laminating: The polished sheet is pulled to the laminating station by the pulling system, and the extruded sheet is laminated from both sides to the middle by the laminating assembly: the two ends of the front side of the sheet are laminated by the laminating area one, and the middle of the front side of the sheet is laminated by the laminating area two. During laminating, the negative pressure structure of the laminating area two works to absorb and lift the decorative film at the laminating area two;

[0024] 3) Cutting and embossing: The laminated sheet is cut to a fixed length by the cutting component, and the cut sheet is transported to the containing structure by the transfer component. The hot pressing structure embosses the sheet in a cold-in and cold-out manner. After the embossing treatment, the sheet is gradually cooled from the middle to the surrounding by the cooling structure;

[0025] 4) Slicing, grooving, and packing: The embossed sheet is sliced by a slicing machine, and the four sides of the sheet are grooved by a grooving machine. Both slicing and grooving are dust-free processes. Finally, the grooved sheets are uniformly packed by a packing machine.

[0026] Compared with the prior art, the present invention has the following beneficial effects: The film laminating component laminates the sheet extruded and finished by the extruder. When laminating, the film is laminated from both sides to the middle, which can prevent the decorative film from running off during feeding and always ensure that the feeding position of the decorative film is consistent. The method of laminating from both sides to the middle can overcome the technical prejudice that laminating from the middle to both sides is prone to wrinkles. The bottom of the flexible horizontal seal divides the decorative film into two sections and provides a length guarantee for the subsequent decorative film to be laminated, facilitating that the areas of the two sides during the subsequent middle laminating will not have length changes due to the later lamination in the middle. Since the negative pressure structure lifts the middle decorative film at two places in the laminating area, it makes the air that is prone to exist during laminating rush forward and overflow. The method of laminating from both sides to the middle is used to prevent the occurrence of wrinkles and overcome this technical prejudice. The embossing treatment is carried out by using a cold-in and cold-out hot pressing process. The laminated sheet is hot pressed and embossed by a hot pressing structure, and the hot pressed and embossed sheet is gradually cooled from the middle to the periphery by a cooling structure, so that the middle of the sheet cools first, shrinks and retracts, causing the periphery to warp upward. The preheating is used in combination with the upper hot pressing structure to perform secondary hot pressing on the periphery of the sheet to prevent the phenomenon of uneven hot pressing and delamination and warping at the periphery of the sheet. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the overall structure of the embossing component of the present invention.

[0029] Figure 3 It is a distribution diagram of the heating structure inside the heating plate of the present invention.

[0030] Figure 4 It is a position relationship diagram of the heating structure and the cooling structure inside the heating plate of the present invention.

[0031] Figure 5 It is a schematic diagram of the overall structure of the film laminating component of the present invention.

[0032] Figure 6 It is a connection relationship diagram of the flexible horizontal seal and the flexible film pressing member in the film laminating component of the present invention.

[0033] Figure 7 It is a position relationship diagram of the embossing component and the transfer component of the present invention. Detailed Embodiments

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] Embodiment 1, as Figures 1 to 7 shown, a stone plastic floor film laminating device includes: a frame body 10; a film laminating assembly and a embossing assembly are sequentially arranged on the frame body 10 along the plate processing direction.

[0037] The film laminating assembly laminates the plate on the surface of the plate in a manner of laminating from both sides to the middle.

[0038] The film laminating assembly includes a first film laminating area for laminating both ends of the front surface of the plate, and a second film laminating area for laminating the middle part of the front surface of the plate. The first film laminating area laminates the decorative film on the plate prior to the second film laminating area, and there is a lifting structure at the second film laminating area for lifting the middle area of the decorative film.

[0039] The film laminating assembly includes a fixing structure 20 mounted on a frame 10; a flexible horizontal seal 21 and a flexible film pressing member 22 are fixedly installed on the fixing structure 20. The two ends of the flexible horizontal seal 21 and the flexible film pressing member 22 are hermetically attached to enclose a first film laminating area; the middle part of the flexible film pressing member 22 bulges backward, and the middle part of the flexible film pressing member 22 and the flexible horizontal seal 21 enclose a second film laminating area; the flexible film pressing member 22, the flexible horizontal seal 21 and the decorative film enclose a lifting structure, and a negative pressure structure 23 is installed on the fixing structure 20 at the lifting structure. In the working condition, the negative pressure structure 23 adsorbs and lifts the decorative film or expels air through the flexible film pressing member 22. Through the negative pressure adsorption and lifting of the decorative film by the negative pressure structure 23, the bottom of the flexible film pressing member 22 will exert downward pressure, and the decorative film can be tightly laminated on the surface of the board. The decorative film is separated by the flexible horizontal seal 21, and the length of the decorative film in the first film laminating area and the second film laminating area can be ensured or maintained through the separation. Since the decorative film on both sides will pass through the first film laminating area and be immediately laminated on the board after passing through the flexible horizontal seal 21, and the two ends of the flexible film pressing member 22 press it down, at this time, the negative pressure structure 23 in the middle will adsorb and lift the decorative film in the second film laminating area, but the lifting distance is basically maintained in the range of 0.1 - 0.5 mm, which can ensure that the air is driven forward and discharged, and at the same time, it can prevent the decorative film from shifting.

[0040] The film laminating assembly laminates the sheet extruded and finished by the extruder. During film lamination, the film lamination is completed in a way from both sides to the middle. Using this solution can prevent the decorative film from running off during feeding, and always ensure that the feeding position of the decorative film is consistent. Laminating from both sides to the middle can overcome the technical prejudice that laminating from the middle to both sides in the past easily leads to wrinkles. The bottom of the flexible horizontal seal separates the decorative film into two sections and provides a length guarantee for the subsequent decorative film to be laminated, which is convenient for ensuring that the lengths of the laminated areas on both sides will not change due to the subsequent lamination in the middle. Since the negative pressure structure lifts the middle decorative film in the second film laminating area, it is easy to drive the air forward and overflow during film lamination. Laminating from both sides to the middle can prevent the occurrence of wrinkles and overcome this technical prejudice.

[0041] The embossing assembly embosses the laminated board in a cold-in and cold-out manner.

[0042] The embossing assembly includes a holding structure 24 for holding the laminated sheet. The holding structure 24 includes a holding body 242 installed on one side of the frame 10, and an auxiliary heating structure 241 is provided on the side of the holding body 242. The holding structure 24 is rectangular, and the height of the middle area is 1-2 mm higher than that of the surrounding areas. The embossing assembly also includes a hot pressing structure 25 for cold inlet and cold outlet of the held sheet. The hot pressing structure 25 includes a hot pressing plate 251 installed on one side of the frame 10 and moving up and down relative to the holding structure 24. The power source is a cylinder or an oil cylinder purchased by the inventor. An heating structure 252 for heating the sheet and a cooling structure 253 for retracting from the middle to the periphery in sequence after hot pressing the sheet are embedded inside the hot pressing plate 251. After embossing the texture, the cooling direction of the cooling structure 253 is gradually cooled from the middle to the periphery. During the cooling process, the sheet will gradually retract from the middle to the periphery and drive the surrounding areas to warp upwards, thereby cooperating with the heating structure 252 to complete further hot pressing. The holding structure 24 is used to hold the laminated sheet, and the hot pressing structure 25 is used to perform segmented hot pressing and embossing on the top of the held sheet. After the sheet enters the inside of the holding structure 24, the hot pressing structure 25 presses down the sheet and then heats it and gradually increases the pressure to complete the embossing treatment of hot pressing. During the hot pressing process, the auxiliary pressing structure 241 also heats the side of the sheet synchronously to prevent the phenomenon of easy delamination in the later stage due to the low temperature in the side area of the sheet and the inability to complete efficient hot pressing with the decorative film. Then, it cooperates with the cooling structure 253 to gradually cool the hot-pressed sheet from the middle to the periphery, so that the sheet in the middle area first retracts and drives the surrounding areas to warp upwards, thereby cooperating with the preheating of the top hot pressing plate to perform further hot pressing on the periphery of the sheet, ensuring the interlayer bonding ability of the sheet, especially the interlayer bonding ability of the surrounding areas. The interlayer bonding strength is increased from the original 2.1-2.4 MPa to 4.3-4.5 MPa.

[0043] By adopting the hot pressing process of cold inlet and cold outlet for embossing treatment, the laminated sheet is hot pressed and embossed by the hot pressing structure, and the hot-pressed and embossed sheet is gradually cooled from the middle to the periphery by the cooling structure, so that the middle of the sheet is first cooled, tightened and retracted, and the surrounding areas are warped upwards. The preheating is used to cooperate with the upper hot pressing structure to perform secondary hot pressing on the periphery of the sheet, preventing the phenomenon of uneven hot pressing and delamination and warping at the periphery of the sheet.

[0044] Example 2, as Figure 1As shown, the following improvements are made on the basis of the above embodiment, the laminating device also includes a cutting component 30 arranged between the laminating component and the embossing component, a conveying component 40 arranged between the output end of the extruder and the input end of the embossing component, and a transfer component 50 for transferring the laminating-treated sheet to the holding structure 24 for hot pressing. The laminating-treated sheet is cut by the cutting component 30 to facilitate the subsequent embossing process, the conveying component 40 can complete the lamination of the sheet during transportation, and the sheet is transferred to the holding structure 25 through the transfer component and embossed by a hot pressing process in a cold-in and cold-out manner.

[0045] A production process of a stone plastic floor, using the film laminating equipment as described in the above embodiment, the process steps are as follows:

[0046] 1) Extrusion molding: The mixed raw materials are melt-mixed by an extruder and extruded through a mold, and then polished by multiple groups of polishing rollers to obtain a surface-smoothed sheet;

[0047] 2) Laminating: The polished sheet is pulled to the laminating station by the pulling system, and the extruded sheet is laminarized from both sides to the middle by the laminating assembly: the two ends of the front side of the sheet are laminarized by the laminating area one, and the middle of the front side of the sheet is laminarized by the laminating area two. When laminating the laminating area two, the negative pressure structure 23 works to absorb and lift the decorative film at the laminating area two;

[0048] 3) Cutting and embossing: The laminated sheet is cut to a fixed length by the cutting assembly 30, and the cut sheet is transported to the containing structure 24 by the transfer assembly 50, and the sheet is embossed by the hot pressing structure 25 in a cold-in and cold-out manner. After the embossing, the sheet is gradually cooled from the middle to the surrounding by the cooling structure 253;

[0049] 4) Slicing, slotting and packaging: The embossed sheets are sliced by a slicer, and the sheets are slotted around by a slotting machine. Both slicing and slotting are dust-free. Finally, the slotted sheets are packaged uniformly by a packaging machine.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A stone plastic floor laminating device, characterized in that, Including: A frame body (10); A film laminating component and a embossing component are sequentially arranged on the frame body (10) along the plate processing direction; The film laminating component laminates the plate on the surface of the plate in a way of laminating from both sides to the middle; The embossing component embosses the laminated plate in a way of cold inlet and cold outlet; The film laminating component includes a first film laminating area for laminating both ends of the front surface of the plate, and a second film laminating area for laminating the middle part of the front surface of the plate. The first film laminating area laminates the decorative film on the plate prior to the second film laminating area, and there is a lifting structure at the second film laminating area for lifting the middle area of the decorative film; The film laminating component includes a fixing structure (20) installed on the frame body (10); A flexible horizontal seal (21) and a flexible film pressing member (22) are fixedly installed on the fixing structure (20). The two ends of the flexible horizontal seal (21) and the flexible film pressing member (22) are hermetically attached to enclose the first film laminating area; The middle part of the flexible film pressing member (22) bulges backward, and the middle part of the flexible film pressing member (22) and the flexible horizontal seal (21) enclose the second film laminating area; The flexible film pressing member (22), the flexible horizontal seal (21) and the decorative film enclose a lifting structure. A negative pressure structure (23) is installed on the fixing structure (20) at the lifting structure. Under working conditions, the negative pressure structure (23) adsorbs and lifts the decorative film or expels air through the flexible film pressing member (22).

2. The stone plastic floor film laminating device according to claim 1, characterized in that, The embossing component includes a holding structure (24) for holding the laminated plate, and a hot pressing structure (25) for cold inlet and cold outlet of the held plate. The holding structure (24) is used for holding the laminated plate, and the hot pressing structure (25) is used for hot pressing and texturing the top part of the held plate in sections.

3. The stone plastic floor laminating device according to claim 2, wherein The hot pressing structure (25) includes a hot pressing plate (251) installed on one side of the frame body (10) and moving relative to the holding structure (24). An heating structure (252) for heating the plate and a cooling structure (253) for gradually retracting from the middle to the periphery after hot pressing the plate are embedded inside the hot pressing plate (251). After hot pressing the texture, the cooling direction of the cooling structure (253) is gradually cooled from the middle to the periphery. During the cooling process, the plate will gradually retract from the middle to the periphery and drive the surrounding area to warp upward, thereby cooperating with the heating structure (252) to complete further hot pressing.

4. The stone plastic floor film laminating device according to claim 3, wherein, The holding structure (24) includes a holding body (242) installed on one side of the frame body (10), and an auxiliary heating structure (241) is arranged on the side of the holding body (242).

5. The stone plastic floor laminating device according to claim 4, characterized in that, The holding structure (24) is rectangular, and the height of the middle area is 1-2 mm higher than the height of the surrounding area.

6. The stone plastic floor laminating device according to claim 3, wherein The film laminating device further includes a cutting component (30) arranged between the film laminating component and the embossing component, a conveying component (40) arranged between the output end of the extruder and the input end of the embossing component, and a transfer component (50) for transferring the laminated plate to the holding structure (24) for hot pressing treatment.

7. A production process of a stone plastic floor, using the film laminating equipment as described in claim 6, characterized in that, The process steps are as follows: 1) Extrusion molding: The mixed raw materials are melted and mixed by an extruder and extruded through a mold and subjected to smooth surface treatment by multiple groups of smooth rollers to obtain a smooth whole sheet; 2) Film laminating: The entire light sheet is pulled to the film laminating station by the traction system, and the extruded sheet is subjected to film laminating treatment from both sides to the middle by the film laminating assembly: film laminating at both ends of the front of the sheet through the first film laminating area, and film laminating in the middle of the front of the sheet through the second film laminating area. When laminating in the second film laminating area, the negative pressure structure (23) works to adsorb and lift the decorative film at the second film laminating area; 3) Cutting and embossing: The laminated sheet is cut to a fixed length by the cutting assembly (30). The cut sheet is conveyed into the containing structure (24) by the transfer assembly (50), and the sheet is embossed by the hot pressing structure (25) in a cold-in and cold-out manner. After the embossing treatment, the sheet is gradually cooled from the middle to the surroundings by the cooling structure (253); 4) Slicing, grooving and packing: The embossed sheet is sliced by a slicing machine, and the four sides of the sheet are grooved by a grooving machine. Both slicing and grooving are dust-free treatments. Finally, the grooved sheet is uniformly packed by a packing machine.

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