Low-temperature processing method for lock catch of stone-plastic composite floor

Abstract

The invention relates to the field of stone-plastic composite floor processing, in particular to a stone-plastic composite floor lock catch low-temperature processing method which comprises the following steps: 1, providing a milling cutter device; 2, providing a stone-plastic composite floor; 3, overall pre-cutting; 4, local pre-cutting; fifthly, local fine trimming and cutting machining are carried out; 6, secondary local fine trimming and secondary local pre-cutting are carried out; 7, local fine trimming and local pre-cutting are conducted again; 8, further local fine trimming; 9, finely trimming the base material layer; tenthly, overall local fine trimming is conducted; and eleventhly, the whole end is finely trimmed. According to the stone-plastic composite floor processing method, the balance layer, the base material layer, the decorative layer and the wear-resistant layer of the stone-plastic composite floor are subjected to multiple times of pre-cutting and fine trimming in sequence, the cutting amount of each step is reduced, brittle failure of stone-plastic materials of the base material layer due to the fact that the cutting amount is too large is avoided, and the processing defective rate of the stone-plastic composite floor is reduced.

Description

Technical Field

[0001] The invention relates to the field of stone-plastic composite floor processing, in particular to a low-temperature processing method for locking buckles of a stone-plastic composite floor. Background Art

[0002] Stone plastic composite flooring is a new type of composite flooring consisting of a balancing layer (ethylene-vinyl acetate copolymer), a base layer (stone plastic board), a decorative layer (wood veneer) and a wear-resistant layer (aluminum oxide wear-resistant paper). It has the advantages of being environmentally friendly, affordable, good processing performance, high strength, easy installation and recyclable. It is widely used in floor decoration in homes, businesses, stadiums and other places. At present, in the process of locking buckle processing of stone-plastic composite floor, excessively high cutting temperature will cause plastic deformation of stone plastic, and stone plastic particles will adhere to the surface of milling cutter teeth to form built-up edge, which will then cause the milling cutter processing profile to change, affecting the processing accuracy of the locking buckle of the stone-plastic composite floor, and causing problems such as joint separation, joint bulge and uneven joint level when assembling the stone-plastic composite floor; in addition, the current processing of stone-plastic composite floor mostly adopts the stone-plastic floor locking buckle processing method, ignoring the fact that the stone-plastic composite floor is a multi-layer structure, and the materials of different layers have different melting points, which will cause the materials to melt during cutting, making the processing surface of the balance layer (ethylene-vinyl acetate copolymer) of the stone-plastic composite floor uneven and the decorative layer (wood veneer) having wood hair and fiber tearing problems, affecting the assembly accuracy of the stone-plastic composite floor, so it is very necessary to propose a low-temperature processing method for locking buckle of stone-plastic composite floor. Summary of the invention

[0003] The purpose of the present invention is to provide a low-temperature processing method for locking buckles of stone-plastic composite floors, so that when processing the stone-plastic composite floors, the surfaces of the balancing layer and the decorative layer can be made smoother, the generation of built-up edge can be prevented, the processing quality and the splicing quality can be improved, so as to solve the existing technical defects and unattainable technical requirements.

[0004] To achieve the above object, the present invention provides the following technical solution: a low-temperature processing method for locking buckles of stone-plastic composite flooring, comprising the following steps:

[0005] 1) Provide a milling cutter device, comprising:

[0006] 1.1) Double-end milling cutter shaft, each shaft is equipped with a corresponding milling cutter and a low-temperature injection device, and the low-temperature injection device can provide a low-temperature environment for milling cutter cutting;

[0007] 2) Provide a stone plastic composite floor, including:

[0008] 2.1) A balancing layer, a base material layer, a decorative layer and a wear-resistant layer, wherein the balancing layer, the base material layer, the decorative layer and the wear-resistant layer are fixedly stacked in sequence from top to bottom;

[0009] 3) Overall pre-cutting

[0010] 3.1) Set the milling cutter parallel to the floor, pre-cut the balancing layer, base material layer, decorative layer and wear-resistant layer on one side of the floor at the same time, and provide an overall cutting environment through a low-temperature spray device, so that a first overall pre-cut surface is formed at one end of the floor after processing;

[0011] 3.2) Set the milling cutter vertically to the floor, insert the cutter from above the balancing layer, pre-cut the balancing layer and the base material layer on the other side of the floor at the same time, and provide an overall cutting environment through a low-temperature spray device. After processing, a second overall pre-cut surface is formed at one end of the floor;

[0012] 4) Partial pre-cutting

[0013] 4.1) Tilt the milling cutter upward toward the floor, perform partial pre-cutting on part of the first overall pre-cut surface on the substrate layer, and provide an overall cutting environment through a low-temperature spray device, so that a first partial pre-cut surface is formed on the substrate layer after processing;

[0014] 4.2) The milling cutter is set parallel to the floor, and a part of the second overall pre-cut surface on the base material layer is partially pre-cut, and an overall cutting environment is provided by a low-temperature spray device, and after processing, a second partial pre-cut surface is formed on the base material layer, the decorative layer and the wear-resistant layer;

[0015] 5) Local finishing and cutting

[0016] 5.1) Setting the milling cutter parallel to the floor, partially finishing the first integral pre-cut surface on the balancing layer and the base material layer, and providing an integral cutting environment through a low-temperature spray device, forming the first partial finishing surface on the balancing layer and the base material layer after processing;

[0017] 5.2) The milling cutter is set parallel to the floor, and a part of the second overall pre-cut surface on the substrate layer is locally pre-cut, and the second local pre-cut surface on the substrate layer is cut at the same time, and an overall cutting environment is provided by a low-temperature spray device during the processing, and after the processing, a third local pre-cut surface and a second local finishing surface are respectively obtained on the substrate layer;

[0018] 6) Secondary local finishing and secondary local pre-cutting

[0019] 6.1) The milling cutter is set parallel to the floor, and a part of the first partial pre-cut surface on the substrate layer is partially fine-trimmed, and another part of the first overall pre-cut surface on the substrate layer, the decorative layer and the wear-resistant layer is partially pre-cut, and an overall cutting environment is provided by a low-temperature spray device during the processing, and after processing, a third partial fine-trimmed surface is obtained on the substrate layer, and a fourth partial pre-cut surface is obtained on the substrate layer, the decorative layer and the wear-resistant layer;

[0020] 6.2) Tilt the milling cutter downward and aim it at the floor, and partially pre-cut the remaining third partial pre-cut surfaces on the base material layer, the decorative layer and the wear-resistant layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain a fifth partial pre-cut surface on the base material layer, the decorative layer and the wear-resistant layer;

[0021] VII) Re-local finishing and local pre-cutting

[0022] 7.1) The milling cutter is tilted upward and aimed at the floor, and another part of the first local pre-cut surface on the substrate layer is cut and processed, and during the processing, a low-temperature spray device is used to provide an overall cutting environment to obtain a fourth local finishing surface and a sixth local pre-cut surface on the substrate layer;

[0023] 7.2) Tilt the milling cutter downward toward the floor, cut another part of the second overall pre-cut surface and part of the third local finishing surface on the balancing layer and the substrate layer, and provide an overall cutting environment through a low-temperature spray device during the processing, obtain a fifth local finishing surface on the balancing layer and the substrate layer, and obtain a seventh local pre-cut surface on the substrate layer;

[0024] 8) Further local refinement

[0025] 8.1) Align the milling cutter vertically upward toward the floor, perform local finishing on the fourth local finishing surface and part of the sixth local pre-cut surface on the substrate layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain the sixth local finishing surface on the substrate layer;

[0026] 8.2) Align the milling cutter vertically with the floor, and perform fine trimming on the seventh local pre-cut surface on the substrate layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain the seventh local fine trimming surface on the substrate layer;

[0027] IX. Substrate layer finishing

[0028] 9.1) Tilt the milling cutter toward the floor, perform local finishing on the third local finishing surface on the substrate layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain an eighth local finishing surface on the substrate layer;

[0029] 9.2) Tilt the milling cutter upward toward the floor, and perform finishing on another part of the second local finishing surface on the substrate layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain a ninth local finishing surface on the substrate layer;

[0030] 10) Overall and partial refinement

[0031] 10.1) Setting the milling cutter parallel to the floor, partially finishing the fourth local pre-cut surface on the base material layer, the decorative layer and the wear-resistant layer, and providing an overall cutting environment through a low-temperature spray device during the processing, and obtaining a tenth local finishing surface on the base material layer, the decorative layer and the wear-resistant layer;

[0032] 10.2) Tilt the milling cutter towards the floor, and fine-trim the fifth local pre-cut surface on the base material layer, the decorative layer and the wear-resistant layer, and provide an overall cutting environment through a low-temperature spray device during the processing to obtain an eleventh local fine-trim surface on the base material layer, the decorative layer and the wear-resistant layer;

[0033] 11) Overall end finishing

[0034] 11.1) Setting the milling cutter parallel to the floor, locally finishing the tenth local finishing surface on the base material layer, the decorative layer and the wear-resistant layer, and providing an overall cutting environment through a low-temperature spray device during the processing, so as to obtain a twelfth local finishing surface on the base material layer, the decorative layer and the wear-resistant layer;

[0035] 11.2) Tilt the milling cutter toward the floor, and perform finishing on the eleventh local finishing surface on the base material layer, the decorative layer and the wear-resistant layer. During the processing, a low-temperature spray device is used to provide an overall cutting environment to obtain a thirteenth local finishing surface on the base material layer, the decorative layer and the wear-resistant layer.

[0036] Preferably, in steps 1) to 10), all cutting processes are reverse milling, and the cutting process in step 11) is forward milling.

[0037] In this application, it is necessary to explain the difference between down milling and reverse milling. Down milling means that the direction of the milling cutter cutting speed is the same as the direction of the floor movement, while reverse milling means that the direction of the milling cutter cutting speed is opposite to the direction of the floor movement. The reverse milling cutting method is to prevent the stone plastic composite floor from breaking when the milling cutter finishes cutting.

[0038] Preferably, the low-temperature injection device in steps 3.1), 3.2), 4.1), 4.2), 5.2), 6.2), 7.1) and 7.2) realizes the low-temperature environment by injecting supercritical CO2 gas, while the low-temperature injection device in steps 5.1), 6.1), 8.1), 8.2), 9.1), 9.2), 10.1), 10.2), 11.1) and 11.2) realizes the low-temperature environment by injecting lubricant.

[0039] Preferably, in the step 3), during cutting, the cutting depth allowance is 1-1.5 mm.

[0040] Preferably, in the step 4), during cutting, the cutting depth allowance is 0.4-0.7 mm.

[0041] Preferably, in step 5.2), step 6) and step 7), during cutting, the cutting depth and machining allowance are both 0.1-0.2 mm.

[0042] Preferably, in the step (10), during cutting, the cutting length allowance is 10 mm.

[0043] Preferably, in the step 3.2), a portion of the second overall pre-cut surface is an arc surface;

[0044] In the step 4.1), a portion of the first local pre-cut surfaces is an arc surface;

[0045] In the step 4.2), a portion of the second local pre-cut surfaces is an arc surface;

[0046] In the step 5.2), part of the second local finishing surface in the second local finishing surface is an arc surface;

[0047] In the step 6.1), another part of the third partial finishing surface in the third partial finishing surface is an arc surface;

[0048] In the step 7.2), a portion of the fifth partial finishing surface is an arc surface.

[0049] Preferably, in step 3.1), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least 3 forming milling cutters;

[0050] In the steps 3.2), 4.2), 5.1), 6.2), 7.2), 10.1), 10.2), 11.1) and 11.2), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least two forming milling cutters;

[0051] In the steps 4.1), 5.2), 7.1), 8.1) and 9.1), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least one forming milling cutter.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The present application adopts a method of processing in multiple steps in sequence, and adopts multiple pre-cutting and finishing for the balancing layer, substrate layer, decorative layer and wear-resistant layer of the stone-plastic composite floor, which reduces the cutting amount of each step, avoids the brittle damage of the stone-plastic material of the substrate layer caused by excessive cutting amount, and reduces the defective rate of the stone-plastic composite floor processing.

[0054] 2. This application increases the number of double-end milling cutter shaft configurations in order to separately cut and process the balancing layer, base material layer, decorative layer and wear-resistant layer of the stone-plastic composite floor. Since the materials used for each layer of the stone-plastic composite floor are different, different milling cutters are selected for cutting according to different material properties, which is beneficial to improving the cutting quality, avoiding the uneven processing surface of the balancing layer of the stone-plastic composite floor and the problems of wood hair and fiber tearing in the decorative layer, and further improving the assembly accuracy of the stone-plastic composite floor.

[0055] 3. During the cutting process, a low-temperature spray device is used to assist cutting, which reduces the cutting temperature and the friction between the tool and the cutting material. This is not only conducive to preventing the formation of built-up edge, but also further improves the cutting quality, making the cutting surface smoother, and avoiding problems such as joint separation, joint bulge, and uneven joint level. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a schematic diagram of the positional relationship between the milling cutter and the floor in this application;

[0057] Figure 2 This is a processing schematic diagram of step 3.1) in the embodiment of the present application;

[0058] Figure 3 This is a processing schematic diagram of step 3.2) in the embodiment of the present application;

[0059] Figure 4 This is a processing schematic diagram of step 4.1) in the embodiment of the present application;

[0060] Figure 5 This is a processing schematic diagram of step 4.2) in the embodiment of the present application;

[0061] Figure 6 This is a processing schematic diagram of step 5.1) in the embodiment of the present application;

[0062] Figure 7 This is a processing schematic diagram of step 5.2) in the embodiment of the present application;

[0063] Figure 8 This is a processing schematic diagram of step 6.1) in the embodiment of the present application;

[0064] Fig. 9 Schematic diagram of the processing of step 6.2) in the embodiment of the present application;

[0065] Fig.10 Schematic diagram of the processing of step 7.1) in the embodiment of the present application;

[0066] Fig.11 This is a processing schematic diagram of step 7.2) in the embodiment of the present application;

[0067] Fig.12 Schematic diagram of the processing of step 8.1) in the embodiment of the present application;

[0068] Fig.13 This is a processing schematic diagram of step 8.2) in the embodiment of the present application;

[0069] Fig.14 Schematic diagram of the processing of step 9.1) in the embodiment of the present application;

[0070] Fig.15 Schematic diagram of the processing of step 9.2) in the embodiment of the present application;

[0071] Fig.16 Schematic diagram of the processing of step 10.1) in the embodiment of the present application;

[0072] Fig.17 Schematic diagram of the processing of step 10.2) in the embodiment of the present application;

[0073] Fig.18 Schematic diagram of the processing of step 11.1) in the embodiment of the present application;

[0074] Fig.19 Schematic diagram of the processing of step 11.2) in the embodiment of the present application;

[0075] Fig. 20 This is a schematic diagram of adjacent floor panels spliced ​​after final processing in an embodiment of the present application;

[0076] In the figure: balancing layer 1; base material layer 2; decorative layer 3 and wear-resistant layer 4; first milling cutter T1; third milling cutter T3; fifth milling cutter T5; seventh milling cutter T7; ninth milling cutter T9; eleventh milling cutter T11; thirteenth milling cutter T3; fifteenth milling cutter T5 and seventeenth milling cutter T17, and the milling cutters located on the right side of the floor and used for processing the right side of the floor are: second milling cutter T2; fourth milling cutter T4; sixth milling cutter T6; eighth milling cutter T8; tenth milling cutter T10; twelfth milling cutter T12; fourteenth milling cutter T14; sixteenth milling cutter T16; eighteenth milling cutter T18; first overall pre-cut surface A1-A5; part of the first overall pre-cut surface A1-A3; another part of the first overall pre-cut surface A5; second overall pre-cut surface B1-B7; part of the second overall pre-cut surface B7; another part of the second overall pre-cut surface B1-B5; first partial pre-cut surface D1-D8; part of the first partial pre-cut surface D4-D8; another part of the first partial pre-cut surface D2-D4; one part of the first partial pre-cut surface D6; The second partial pre-cut surface E1-E2; a part of the second partial pre-cut surface E2; the first partial finishing surface F1-F4; the third partial pre-cut surface G1, G4; a part of the third partial pre-cut surface G4; the second partial finishing surface G2, G3; a part of the second partial finishing surface G2; the third partial finishing surface H1-H3; the fourth partial pre-cut surface H4; a part of the third partial finishing surface H1; another part of the third partial finishing surface H2; the fifth partial pre-cut surface I1; the fourth partial finishing surface J3; the sixth partial pre-cut surface Cutting surface J2-J3; part of the sixth local pre-cutting surface J2; the fifth local finishing surface K1, K2, K5; a part of the fifth local finishing surface K2; the seventh local pre-cutting surface K3-K4; the sixth local finishing surface L1-L2; the seventh local pre-cutting surface K3-K4; the seventh local finishing surface M1-M2; the eighth local finishing surface N1; the ninth local finishing surface O1; the tenth local finishing surface P1; the eleventh local finishing surface Q1; the twelfth local finishing surface R1; the thirteenth local finishing surface S1. DETAILED DESCRIPTION

[0077] 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.

[0078] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0079] Please refer to the figure, an embodiment of the present invention:

[0080] Example:

[0081] like Figure 1 As shown: A low temperature processing method for locking buckles of stone plastic composite floor, characterized by comprising the following steps:

[0082] 1) Provide a milling cutter device, comprising:

[0083] 1.1. The milling cutter shaft of the double-end milling machine has a corresponding milling cutter and a low-temperature injection device installed on each shaft, and the low-temperature injection device can provide a low-temperature environment for the milling cutter cutting;

[0084] Specifically, the milling cutter axis of the double-end milling in this embodiment is set to 9 stations and 18 cutters, among which the milling cutters located on the left side of the floor and used for processing the left side of the floor are: the first milling cutter T1, the third milling cutter T3, the fifth milling cutter T5, the seventh milling cutter T7, the ninth milling cutter T9, the eleventh milling cutter T11, the thirteenth milling cutter T3, the fifteenth milling cutter T5 and the seventeenth milling cutter T17, and the milling cutters located on the right side of the floor and used for processing the right side of the floor are: the second milling cutter T2, the fourth milling cutter T4, the sixth milling cutter T6, the eighth milling cutter T8, the tenth milling cutter T10, the twelfth milling cutter T12, the fourteenth milling cutter T14, the sixteenth milling cutter T16 and the eighteenth milling cutter T18, and are arranged opposite to each other in sequence.

[0085] 2) Provide a stone plastic composite floor, including:

[0086] 2.1), a balancing layer 1, a substrate layer 2, a decorative layer 3 and a wear-resistant layer 4, wherein the balancing layer 1, the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4 are fixedly stacked in sequence from top to bottom;

[0087] Specifically, in this embodiment, the balancing layer 1 of the stone-plastic composite floor is ethylene-vinyl acetate copolymer, and the decorative layer 3 is wood veneer.

[0088] like Figure 2 As shown: 3) Overall pre-cut

[0089] 3.1) Set the first milling cutter T1 parallel to the floor, and pre-cut the balance layer 1, base material layer 2, decorative layer 3 and wear-resistant layer 4 on the left side of the floor at the same time. The first milling cutter T1 is composed of 3 molded milling cutters connected together, and the cutting method is reverse milling. One milling cutter is used for cutting the balance layer 1, one milling cutter is used for cutting the base material layer 2, and one milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4. This design is due to the different materials used in each layer of the stone-plastic composite floor. Different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the uneven processing surface of the stone-plastic composite floor balance layer 1 (ethylene-vinyl acetate copolymer) and the wood wool and fiber tearing problems of the decorative layer 3 (wood veneer), and further improving the assembly accuracy of the stone-plastic composite floor. In addition, when cutting the balancing layer 1, the base material layer 2, the decorative layer 3 and the wear-resistant layer 4, due to the different melting points of the materials in different layers, excessively high cutting temperatures will cause the materials with low melting points to melt; at the same time, due to the large cutting depth of the vertical axis combination milling cutter T1, built-up edge is very likely to occur when cutting the base material layer 2; in order to prevent the high cutting temperature and built-up edge from affecting the cutting quality, supercritical CO2 gas is sprayed through a low-temperature injection device to provide an overall cutting environment. The supercritical CO2 gas itself has a low temperature and can quickly reduce the temperature of the cutting area to prevent the formation of built-up edge. After processing, a first integral pre-cut surface A1-A5 is formed at one end of the floor, and the obtained pre-processed surface cutting depth processing allowance is 1mm; wherein surface A1 is on the balancing layer 1, and surfaces A2-A5 are on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4, and from top to bottom, surface A1 is inclined away from the center of the floor, surface A2 is a vertical surface, surface A3 is inclined toward the center of the floor, and surface A4 is inclined toward the center of the floor, but the inclination angles of surface A3 and surface A4 are different, and surface A5 is a vertical surface that passes through the base material layer 2, the decorative layer 3 and the wear-resistant layer 4.

[0090] like Figure 3As shown: 3.2), the second milling cutter T2 is set vertically to the floor, and the cutter is inserted from above the balancing layer 1 to pre-cut the balancing layer 1 and the substrate layer 2 on the right side of the floor at the same time. The second milling cutter T2 is composed of 2 forming milling cutters connected together, and the cutting method is reverse milling. One milling cutter is used for cutting the balancing layer 1, and the other milling cutter is used for cutting the substrate layer 2. This design is to cut the balancing layer 1 and the substrate layer 2 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problem of uneven processing surface of the stone-plastic composite floor balancing layer 1 (ethylene-vinyl acetate copolymer), and can further improve the assembly accuracy of the stone-plastic composite floor. When cutting the balance layer 1 and the base layer 2, due to the different melting points of the materials in different layers, excessively high cutting temperatures will cause the materials with low melting points to melt; at the same time, due to the large cutting depth of the vertical axis combination milling cutter T2, built-up edge is very likely to occur when cutting the base layer 2; in order to prevent the high cutting temperature and built-up edge from affecting the cutting quality, supercritical CO2 gas is sprayed through a low-temperature injection device to provide an overall cutting environment. The supercritical CO2 gas itself has a low temperature and can quickly reduce the temperature of the cutting area to prevent the formation of built-up edge. After processing, a second integral pre-cut surface B1-B7 is formed at one end of the floor; wherein a part of the second integral pre-cut surfaces B2 and B6 in the second integral pre-cut surfaces B1-B7 are arc surfaces, and the obtained pre-processed surface cutting depth processing allowance is 1mm; wherein surface B1 is on the balancing layer 1, and surfaces B2-B7 are on the substrate layer 2. Specifically, from top to bottom, surface B1 is set to be inclined in the direction away from the center of the floor, B2 is an arc surface recessed toward the center of the floor, surface B3 is set from bottom to top and inclined in the direction away from the center of the floor, and surface B4 is set parallel to it, surface B5 is set from top to bottom and inclined in the direction away from the center of the floor, surface B6 is an arc surface convex in the direction away from the center of the floor, and surface B7 is a plane parallel to the floor, and finally extends to the side of the substrate layer 2. After this step is completed, the lower part of the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4 are not processed.

[0091] It should be noted that in this embodiment, some of the second integral pre-cut surfaces B2 and B6 refer to the two surfaces B2 and B6 in the second integral pre-cut surfaces B1-B7, and B1-B7 refer to surfaces B1, B2, B3, B4, B5, B6 and B7. And each surface of the same type is connected end to end in numerical order, and other similar expressions in this embodiment can be inferred from the above meanings.

[0092] 4) Partial pre-cutting

[0093] like Figure 4As shown in: 4.1), the third milling cutter T3 is tilted upward and aimed at the floor, and a part of the first overall pre-cut surface A4 on the substrate layer 2 is partially pre-cut. The cutting method is reverse milling. The third milling cutter T3 only needs to use one milling cutter to cut the substrate layer 2. Here, the vertical axis milling cutter T3 is only used for cutting the floor substrate layer 2. In addition, it is very easy to generate built-up edge when cutting the substrate layer 2. In order to avoid the built-up edge affecting the cutting quality, a low-temperature injection device is used to inject supercritical CO2 gas during the cutting process to provide an overall cutting environment, reduce the temperature of the cutting area, and prevent the generation of built-up edge. After processing, the first local pre-cut surface D1 is formed on the substrate layer 2. -D8; the obtained pre-processed surface cutting depth machining allowance is 0.7mm, and a part of the first partial pre-cut surface D6 among the first partial pre-cut surfaces D1-D8 is an arc surface; wherein, surface D1 is a plane parallel to the floor, surface D2 is inclined from bottom to top and is set close to the center of the balancing layer 1, surface D3 is a plane parallel to the floor, surface D4 is inclined from top to bottom and is set close to the center of the floor, surface D5 is a plane parallel to the floor, surface D6 is an arc surface concave toward the center of the balancing layer 1, surface D7 is a vertical surface, and surface D8 is inclined from top to bottom and is set away from the center of the floor. Surface D1 is connected to surface A2, and surface D8 is connected to surface A5.

[0094] like Figure 5As shown: 4.2), the fourth milling cutter T4 is set parallel to the floor, and part of the second integral pre-cut surface B7 on the substrate layer 2 is locally pre-cut. The cutting method is reverse milling. The fourth milling cutter T4 is composed of two forming milling cutters connected together, one milling cutter is used for cutting the substrate layer 2, and the other milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4; this design is to cut the substrate layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone-plastic composite floor, and can further improve the assembly accuracy of the stone-plastic composite floor. At the same time, when cutting the base material layer 2, the decorative layer 3, and the wear-resistant layer 4, due to the different melting points of the materials of different layers, excessively high cutting temperatures will cause the materials with low melting points to melt; at the same time, due to the large cutting depth of the fourth milling cutter T4, it is very easy to generate built-up edge when cutting the base material layer 2; in order to prevent the high cutting temperature and built-up edge from affecting the cutting quality, a low-temperature injection device is used to spray supercritical CO2 gas during the cutting process to provide an overall cutting environment, reduce the temperature of the cutting area, and prevent the melting of the material from causing deformation of the floor, which in turn affects the assembly accuracy. After processing, a total of 100% CO2 is generated on the base material layer 2, the decorative layer 3, and the wear-resistant layer 4. The second local pre-cut surface E1-E2 is formed at the same time; wherein a part of the second local pre-cut surface E2 among the second local pre-cut surfaces E1-E2 is an arc surface; the obtained pre-processed surface cutting depth processing allowance is 0.7mm; wherein, this step is to process the unprocessed part of the left end of the floor in step 3.2), that is, the surface E1 penetrates the lower part of the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4, and the surface E1 is slightly inclined from top to bottom away from the center of the floor, and the surface E2 is an arc surface protruding away from the center of the floor, and here the surface E2 is connected to the surface B6.

[0095] 5) Local finishing and cutting

[0096] like Figure 6As shown: 5.1), the fifth milling cutter T5 is set parallel to the floor, and the first integral pre-cut surface A1-A3 on the balance layer 1 and the substrate layer 2 is partially refined. The cutting method is reverse milling. The fifth milling cutter T5 is composed of two molded milling cutters, which cut the balance layer 1 and the substrate layer 2 respectively. One milling cutter is used for cutting the balance layer 1, and the other milling cutter is used for cutting the substrate layer 2. This design is to cut the balance layer 1 and the substrate layer 2 separately. Different milling cutters are selected for cutting according to different material characteristics, which is conducive to improving the cutting quality, avoiding the problem of uneven processing surface of the stone plastic composite floor balance layer 1, and can further improve the assembly accuracy of the stone plastic composite floor. When cutting the balance layer 1 and the substrate layer 2, since the fifth milling cutter T5 has a low cutting depth and a low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment to obtain a higher cutting surface quality, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the fifth milling cutter T5, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the first local finishing surfaces F1-F4 are formed on the balancing layer 1 and the base material layer 2; wherein, surface F1 is on the balancing layer 1, and surfaces F1-F4 are on the base material layer 2, and F1 is the surface processed on A1, which is tilted from top to bottom away from the center of the floor, surface F2 is the surface processed on A2, F3 is the surface processed on surface A3, which is tilted towards the center of the floor, and surface F4 is the surface processed on surface D1, which is a plane parallel to the floor. Surface F4 is connected to D2.

[0097] like Figure 7As shown: 5.2), the sixth milling cutter T6 is set parallel to the floor, and a part of the second overall pre-cut surface B7 on the substrate layer 2 is partially pre-cut. The cutting method is reverse milling. At the same time, the second local pre-cut surface E1-E2 on the substrate layer 2 is cut. Here, the vertical milling cutter T6 is only used for cutting the floor substrate layer 2. However, due to the large cutting depth of the vertical milling cutter T6, it is very easy to generate built-up edge when cutting the substrate layer 2. In order to avoid the built-up edge affecting the cutting quality, a low-temperature injection device is used to inject supercritical CO2 gas during the cutting process to provide an overall cutting environment, reduce the temperature of the cutting area, and prevent the generation of built-up edge. After processing, the third local pre-cut surfaces G1, G4 and the second local finishing surface G4 are respectively obtained on the substrate layer 2. 2, G3; part of the second partial finishing surface G2 in the second partial finishing surface G2 and G3 is an arc surface; the obtained pre-processed surface cutting depth processing allowance is 0.2mm; wherein, surface G2 is the surface after processing the intersection of surface B5 and surface B6, and is inclined from bottom to top in the direction away from the center of the floor, and surface G2 is the surface obtained after processing surface B6 and surface E2, and is an arc surface protruding away from the center of the floor, and surface G3 is the surface after processing surface E1 on the substrate layer 2, and is a vertical surface, and surface G4 is also the surface after processing surface E1 on the substrate layer 2, and is a surface inclined from top to bottom in the direction away from the center of the floor, surface G1 is connected to B5, and surface G4 is connected to E1.

[0098] 6) Secondary local finishing and secondary local pre-cutting

[0099] like Figure 8As shown: 6.1), the seventh milling cutter T7 is set parallel to the floor, and part of the first local pre-cut surface D4-D8 on the substrate layer 2 is partially refined. The cutting method is reverse milling. The seventh milling cutter T7 is composed of two forming milling cutters. At the same time, another part of the first overall pre-cut surface A5 on the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4 is partially pre-cut. One milling cutter is used for cutting the substrate layer 2, and one milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4; this design is to cut the substrate layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone-plastic composite floor, and can further improve the assembly accuracy of the stone-plastic composite floor. When cutting the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4, since the vertical axis combination milling cutter T7 has a low cutting depth and a low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the seventh milling cutter T7, thereby reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processed surface. , after processing, a third local finishing surface H1-H3 is obtained on the substrate layer 2, and a fourth local pre-cut surface H4 is obtained on the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4; wherein, part of the third local finishing surface (H2) in the third local finishing surface H1-H3 is an arc surface, and the obtained pre-processed surface cutting depth processing allowance is 0.2mm; wherein, surface H1 is the surface after processing on the surfaces D4 and D5, which is a plane parallel to the floor, and H2 is the surface after processing on the surfaces D6-D8, which is an arc surface concave toward the center of the floor, and H3 is the surface after processing on the surface D6, which is a surface inclined from top to bottom away from the center of the floor, and surface H4 is the surface after processing on the surface A5, which is a vertical surface. Wherein, surface H1 is connected to surface D4.

[0100] like Fig. 9As shown: 6.2), the eighth milling cutter T8 is tilted downward and aimed at the floor. The eighth milling cutter T8 is composed of two forming milling cutters. The remaining third local pre-cut surface G4 on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4 is partially pre-cut. The cutting method is reverse milling. One milling cutter is used for cutting the base material layer 2, and one milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4. This design is to cut the base material layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately. Different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone-plastic composite floor, and can further improve the assembly accuracy of the stone-plastic composite floor. At the same time, when cutting the substrate layer 2, the decorative layer 3, and the wear-resistant layer 4, due to the different melting points of the materials in different layers, excessively high cutting temperatures will cause the materials with low melting points to melt; and since the vertical axis combination milling cutter T8 has a large cutting depth, it is very easy to generate built-up edge when cutting the substrate layer 2; in order to prevent the high cutting temperature and built-up edge from affecting the cutting quality, a low-temperature injection device is used to spray supercritical CO2 gas to provide an overall cutting environment during the cutting process. The supercritical CO2 gas itself has a low temperature and can quickly reduce the temperature of the cutting area to prevent the generation of built-up edge. After processing, a fifth local pre-cut surface I1 is obtained on the substrate layer 2, the decorative layer 3, and the wear-resistant layer 4; the obtained pre-processed surface cutting depth processing allowance is 0.2 mm; wherein surface I1 is the surface after processing surface G4 and surface E1, and is set slightly inclined from top to bottom away from the center of the floor.

[0101] VII) Re-local finishing and local pre-cutting

[0102] like Fig.10 As shown in: 7.1), the ninth milling cutter T9 is tilted upward and aimed at the floor, and another part of the first local pre-cut surface D2-D4 and part of the third local finishing surface H1 on the substrate layer 2 are cut. The cutting method is reverse milling. The ninth milling cutter T9 only needs to use one milling cutter to cut the substrate layer 2. Since the vertical milling cutter T9 here is only used for cutting the floor substrate layer 2, but due to the large cutting depth of the vertical milling cutter T9, it is very easy to generate built-up edge when cutting the substrate layer 2. In order to avoid the built-up edge affecting the cutting quality, a low-temperature injection device is used to spray supercritical CO2 gas during the cutting process to enhance the cutting quality. Provide an overall cutting environment, reduce the temperature in the cutting area, prevent the generation of built-up edge, and obtain a fourth local finishing surface J3 and a sixth local pre-cut surface J2-J3 on the base material layer 2; the obtained pre-processed surface cutting depth processing allowance is 0.2mm; wherein, J1 is the surface processed by D2, which is a surface inclined from bottom to top toward the center of the balance layer 1, surface J2 is the surface processed by surface D3 and surface D4, which is a plane parallel to the floor, and J3 is the surface processed by surface H1, which is a surface inclined from top to bottom toward the center of the floor, wherein surface J1 and surface H1 are connected.

[0103] like Fig.11 As shown: 7.2), the tenth milling cutter T10 is tilted downward and aimed at the floor, and the other part of the second integral pre-cut surface B1-B5 on the balancing layer 1 and the substrate layer 2 is cut by reverse milling. The tenth milling cutter T10 is composed of 2 molded milling cutters, which cut the balancing layer 1 and the substrate layer 2 respectively. One milling cutter is used for cutting the balancing layer 1, and the other milling cutter is used for cutting the substrate layer 2; the pre-processing surface cutting depth allowance is 0.2mm; this design is to cut the balancing layer 1 and the substrate layer 2 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problem of uneven processing surface of the balancing layer 1 of the stone-plastic composite floor, and can further improve the assembly accuracy of the stone-plastic composite floor. When cutting the balancing layer 1 and the substrate layer 2, due to the different melting points of the materials of different layers, excessively high cutting temperature will cause the material with a low melting point to melt; at the same time, due to the large cutting depth of the vertical axis combination milling cutter T10, it is very easy to generate built-up edge when cutting the substrate layer 2; in order to prevent the high cutting temperature and built-up edge from affecting the cutting quality, a low-temperature injection device is used to spray supercritical CO2 gas during the cutting process to provide an overall cutting environment, reduce the temperature of the cutting area, and prevent the material from melting to cause deformation of the floor and affect the assembly accuracy. After processing, the fifth local finishing surfaces K1, K2, and K5 are obtained on the balancing layer 1 and the substrate layer 2, and the seventh local pre-cut surface K3-K4 is obtained on the substrate layer 2; wherein, a part of the fifth local finishing surfaces K2 among the fifth local finishing surfaces K1, K2, and K5 is a circular arc surface. Among them, K1 is located in the balancing layer 1, and K1 is the surface processed on B1, and is inclined to the direction away from the center of the floor. Surface K2 is the surface processed on surface B2, and is an arc surface concave toward the center of the floor. Surface K3 is the surface processed on surface B3, and is inclined from bottom to top away from the center of the floor. Surface K4 is the surface processed on surface B4, and is a plane parallel to the floor. Surface K5 is the surface processed on surface B5 and surface G2, and is inclined from top to bottom away from the center of the floor, wherein surface K5 is connected to surface G2. It should be noted that, in this embodiment, since the surfaces are connected end to end, when processing one surface, it is inevitable that the adjacent surfaces will be affected. Therefore, in this embodiment, the processing surface is mainly used as the basis, and the explanation is that the added processing surface affects the adjacent surfaces during processing. Therefore, strictly speaking, this application may have inconsistent content when describing tool processing and surface processing, but the meaning is the same. For example, when the above description is mainly based on the tool, the processing object is only surface B5, but when the description is mainly based on the wood board, the processing object is surface B5 and surface G2. The two express the same meaning. The slightly inconsistent parts in this embodiment should also be understood by referring to the description and drawings here.

[0104] 8) Further local refinement

[0105] like Fig.12 As shown in 8.1), the eleventh milling cutter T11 is vertically aligned upward to the floor, and the fourth local finishing surface J3 and part of the sixth local pre-cut surface J2 on the substrate layer 2 are partially finished. The cutting method is reverse milling. The eleventh milling cutter T11 only needs to use one forming milling cutter to cut the substrate layer 2. Due to the low cutting depth and low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the eleventh milling cutter T11, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the sixth local finishing surface L1-L2 is obtained on the substrate layer 2; wherein, surface L1 is the surface processed by surface J1, which is a surface inclined from bottom to top and close to the center direction of the balance layer 1, and L2 is the surface processed by surface J2 and surface J3, which is a plane parallel to the floor, wherein surface L2 is connected to surface J3.

[0106] like Fig.13 As shown in: 8.2), align the twelfth milling cutter T12 vertically with the floor, and fine-tune the seventh local pre-cut surface K3-K4 on the substrate layer 2. The cutting method is reverse milling. The twelfth milling cutter T12 only needs to use one milling cutter to cut the substrate layer 2. In addition, due to the low cutting depth and low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the twelfth milling cutter T12, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the seventh local fine-trim surface M1-M2 is obtained on the substrate layer 2; wherein, surface M1 is the surface processed by surface K3, which is inclined from bottom to top away from the center of the floor, and surface M2 is the surface processed by surface K4 and surface K5, which is a plane parallel to the floor, wherein surface M1 is connected to surface K2, and surface M2 is connected to surface K5.

[0107] IX) Substrate layer 2 finishing

[0108] like Fig.14As shown: 9.1), the thirteenth milling cutter T3 is tilted and aligned with the floor, and the third local finishing surface H2 on the substrate layer 2 is partially finished. The cutting method is reverse milling. The thirteenth milling cutter T3 only needs to use one milling cutter to cut the substrate layer 2. In addition, due to the low cutting depth and low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the thirteenth milling cutter T3, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the eighth local finishing surface N1 is obtained on the substrate layer 2; wherein, the surface N1 is the surface processed by the surface H2, which is a plane parallel to the floor, and the surface N1 is connected between the surface H2 and the surface H3.

[0109] like Fig.15 As shown: 9.2), the fourteenth milling cutter T14 is tilted upward and aimed at the floor, and the second local finishing surface G2 on the upper part of the substrate layer 2 is finished. The cutting method is reverse milling. The fourteenth milling cutter T14 only needs to use one milling cutter to cut the substrate layer 2. In addition, due to the low cutting depth and low cutting temperature, the material is not easy to melt. During the cutting process, a low-temperature spray device is used to spray mist lubricant to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the to-be-cut teeth of the fourteenth milling cutter T14, reducing the friction between the to-be-cut teeth and the cutting material, and obtaining a smooth processing surface. After processing, the ninth local finishing surface O1 is obtained on the substrate layer 2;

[0110] 10) Overall and partial refinement

[0111] like Fig.16As shown: 10.1. Set the fifteenth milling cutter T15 parallel to the floor, and locally refine the fourth local pre-cut surface H4 on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4. The cutting method is reverse milling. The fifteenth milling cutter T15 is composed of two forming milling cutters, one milling cutter is used for cutting the base material layer 2, and the other milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4. This design is to cut the base material layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately. Different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone plastic composite floor, and can further improve the assembly accuracy of the stone plastic composite floor. The fifteenth milling cutter T15 jumps out when processing 10mm near the end of the stone plastic floor, and obtains a 10mm cutting length margin. In addition, when cutting the base material layer 2, the decorative layer 3 and the wear-resistant layer 4, since the cutting depth of the fifteenth milling cutter T15 is low, the cutting temperature is low, and the material is not easy to melt, a low-temperature spray device is used to spray mist lubricant during the cutting process to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the fifteenth milling cutter T15, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the tenth local finishing surface P1 is obtained on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4;

[0112] like Fig.17 As shown: 10.2), the sixteenth milling cutter T16 is tilted and aligned with the floor, and the fifth local pre-cut surface T1 on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4 is finely trimmed. The cutting method is reverse milling. The sixteenth milling cutter T16 is composed of two forming milling cutters, one milling cutter is used for cutting the base material layer 2, and the other milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4; this design is to cut the base material layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately, and different milling cutters are selected for cutting according to different material characteristics, which is conducive to improving the cutting quality and avoiding the appearance of wood hair in the decorative layer 3 (wood veneer) of the stone plastic composite floor. , fiber tearing problem, can further improve the assembly accuracy of stone plastic composite floor, the sixteenth milling cutter T16 jumps out when processing 10mm near the end of the stone plastic floor, and obtains a 10mm cutting length margin; in addition, when cutting the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4, since the cutting depth of the sixteenth milling cutter T16 is low, the cutting temperature is low, and the material is not easy to melt, a low-temperature spray device is used to spray mist lubricant during the cutting process to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the teeth to be cut of the sixteenth milling cutter T16, reducing the friction between the teeth to be cut and the cutting material, and obtaining a smooth processing surface. After processing, the eleventh local finishing surface Q1 is obtained on the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4;

[0113] 11) Overall end finishing

[0114] like Fig.18 As shown: 11.1), the seventeenth milling cutter T17 is set parallel to the floor, and the tenth local finishing surface P1 on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4 is locally finished. The cutting method is down milling, and the 10mm cutting length margin of the end part of the floor obtained by cutting with the fifteenth milling cutter T15 is removed. The seventeenth milling cutter T17 is composed of two forming milling cutters, one milling cutter is used for cutting the base material layer 2, and the other milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4; this design is to cut the base material layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone plastic composite floor, and can further improve the assembly accuracy of the stone plastic composite floor. In addition, since the cutting depth and cutting temperature of the seventeenth milling cutter T17 are low and the material is not easy to melt, a low-temperature spraying device is used to spray mist lubricant during the cutting process to provide an overall cutting environment, so that the mist lubricant is evenly attached to the surface of the to-be-cut teeth of the seventeenth milling cutter T17, reducing the friction between the to-be-cut teeth and the cutting material, and obtaining a smooth processing surface. After processing, a twelfth local finishing surface R1 is obtained on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4;

[0115] like Fig.19As shown: 11.2), the eighteenth milling cutter T18 is tilted and aligned with the floor, and the eleventh local finishing surface Q1 on the base material layer 2, the decorative layer 3 and the wear-resistant layer 4 is finished. The cutting method is down milling, and the 10mm cutting length margin of the end part of the floor obtained by cutting with the sixteenth milling cutter T16 is removed. The eighteenth milling cutter T18 is composed of two forming milling cutters, one milling cutter is used for cutting the base material layer 2, and the other milling cutter is used for cutting the decorative layer 3 and the wear-resistant layer 4. Since the thickness of the decorative layer 3 and the wear-resistant layer 4 is relatively small, only one milling cutter is needed to complete the cutting of the decorative layer 3 and the wear-resistant layer 4; this design is to cut the base material layer 2 and the decorative layer 3 and the wear-resistant layer 4 separately, and different milling cutters are selected for cutting according to different material characteristics, which is beneficial to improving the cutting quality, avoiding the problems of wood hair and fiber tearing in the decorative layer 3 (wood veneer) of the stone plastic composite floor, and can further improve the assembly accuracy of the stone plastic composite floor. When cutting the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4, since the cutting depth and cutting temperature of the eighteenth milling cutter T18 are low and the material is not easy to melt, a low-temperature spray device is used to spray mist lubricant during the cutting process to provide an overall cutting environment, so that the mist lubricant is evenly adhered to the surface of the teeth to be cut of the eighteenth milling cutter T18, reducing the friction between the teeth to be cut and the cutting material, obtaining a smooth machined surface, and obtaining the thirteenth local finishing surface S1 on the substrate layer 2, the decorative layer 3 and the wear-resistant layer 4 after processing.

[0116] like Fig. 20 As shown: in step 1) to step 10), all cutting processing methods are reverse milling, while the cutting processing method in step 11) is forward milling.

[0117] After the stone-plastic composite floor is cut by 9 workstations and 18 cutter axes, an assembling surface Y1 composed of fine-finished surfaces K1, K2, M1, M2, K5, G2, G3, O1, and S1 and an assembling surface Y2 composed of fine-finished surfaces F1, F2, F4, L1, L2, L3, H1, H2, H3, N1, and R1 are obtained; wherein, the convex part composed of the fine-finished surfaces M1, M2, K5, and G2 of the assembling surface Y1 cooperates with the groove part composed of the fine-finished surfaces L1, L2, L3, H1, H2, and N1 of the assembling surface Y2 to realize the meshing splicing of the stone-plastic composite floor.

[0118] The processed decorative layer and wear-resistant layer have good processing quality. When the stone-plastic composite floor is spliced, the fine-processed surfaces S1 and R1 can achieve seamless splicing, which can prevent dust and other debris from entering after the stone-plastic composite floor is installed; the fine-processed surfaces K1 and F1 are inclined surfaces, which form a triangular space with the ground after assembly. This is to reserve deformation space for the balance layer after it is deformed by heat, so as to avoid warping of the stone-plastic composite floor after installation.

[0119] In this embodiment, milling cutters with different tooth profiles are used to cut the balance layer 1, base layer 2, decorative layer 3 and wear-resistant layer 4 of the stone plastic composite floor respectively; this method increases the number of double-end milling cutter shaft configurations, the purpose of which is to cut the balance layer 1, base layer 2, decorative layer 3 and wear-resistant layer 4 of the stone plastic composite floor separately. Since the materials used for each layer of the stone plastic composite floor are different, different milling cutters are selected for cutting according to different material characteristics, which is conducive to improving the cutting quality, avoiding the uneven processing surface of the balance layer 1 (ethylene-vinyl acetate copolymer) of the stone plastic composite floor and the problem of wood hair and fiber tearing of the decorative layer 3 (wood veneer), and further improving the assembly accuracy of the stone plastic composite floor. At the same time, a low-temperature spray device is used to assist cutting during the cutting process, reducing the cutting temperature during cutting and the friction between the tool and the cutting material, which is not only conducive to preventing the generation of built-up edge, but also further improves the cutting quality, makes the cutting surface smoother, and avoids problems such as splicing separation, splicing seam bulge and splicing seam unevenness.

[0120] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0121] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that those skilled in the art can understand.

Claims

1. A low temperature processing method for locking buckles of stone plastic composite floor, characterized in that: The following steps are involved: 1) Provide a milling cutter device, comprising: 1.1) Double-end milling cutter shaft, each shaft is equipped with a corresponding milling cutter and a low-temperature injection device, and the low-temperature injection device can provide a low-temperature environment for milling cutter cutting; 2) Provide a stone plastic composite floor, including: 2.1), a balancing layer (1), a base material layer (2), a decorative layer (3) and a wear-resistant layer (4), wherein the balancing layer (1), the base material layer (2), the decorative layer (3) and the wear-resistant layer (4) are fixedly stacked in sequence from top to bottom; 3) Overall pre-cutting 3.1) The milling cutter is arranged parallel to the floor, and the balancing layer (1), the base material layer (2), the decorative layer (3) and the wear-resistant layer (4) on one side of the floor are pre-cut simultaneously, and a low-temperature spray device is used to provide an overall cutting environment, and after processing, a first overall pre-cut surface (A1-A5) is formed at one end of the floor; 3.2) The milling cutter is set vertically to the floor, and the cutter is inserted from above the balancing layer (1), and the balancing layer (1) and the base material layer (2) on the other side of the floor are pre-cut at the same time, and a low-temperature spray device is used to provide an overall cutting environment, and after processing, a second overall pre-cut surface (B1-B7) is formed at one end of the floor; 4) Partial pre-cutting 4.1) The milling cutter is tilted upward and directed toward the floor, and a portion of the first integral pre-cut surface (A4) on the substrate layer (2) is partially pre-cut, and an integral cutting environment is provided by a low-temperature spray device, and after processing, a first partial pre-cut surface (D1-D8) is formed on the substrate layer (2); 4.2) The milling cutter is arranged parallel to the floor, and a part of the second integral pre-cut surface (B7) on the base material layer (2) is partially pre-cut, and an integral cutting environment is provided by a low-temperature spray device, and after processing, a second partial pre-cut surface (E1-E2) is formed on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4); 5) Local finishing and cutting 5.1) The milling cutter is arranged parallel to the floor, and a portion of the first integral pre-cut surfaces (A1-A3) on the balancing layer (1) and the base material layer (2) are locally fine-trimmed, and an overall cutting environment is provided by a low-temperature spray device, and after processing, a first partially fine-trimmed surface (F1-F4) is formed on the balancing layer (1) and the base material layer (2); 5.2) The milling cutter is arranged parallel to the floor, and a part of the second overall pre-cut surface (B7) on the substrate layer (2) is partially pre-cut, and the second local pre-cut surface (E1-E2) on the substrate layer (2) is cut at the same time, and an overall cutting environment is provided by a low-temperature spray device during the processing, and after the processing, the third local pre-cut surface (G1, G4) and the second local finishing surface (G2, G3) are respectively obtained on the substrate layer (2); 6) Secondary local finishing and secondary local pre-cutting 6.1) The milling cutter is arranged parallel to the floor, and a part of the first local pre-cut surface (D4-D8) on the substrate layer (2) is partially fine-trimmed, and another part of the first overall pre-cut surface (A5) on the substrate layer (2), the decorative layer (3) and the wear-resistant layer (4) is partially pre-cut, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, and after processing, a third local fine-trimmed surface (H1-H3) is obtained on the substrate layer (2), and a fourth local pre-cut surface (H4) is obtained on the substrate layer (2), the decorative layer (3) and the wear-resistant layer (4); 6.2) Tilt the milling cutter downward and aim it at the floor, and partially pre-cut the remaining third partial pre-cut surface (G4) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4), and provide an overall cutting environment through a low-temperature spray device during the processing to obtain a fifth partial pre-cut surface (I1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4); VII) Re-local finishing and local pre-cutting 7.1) The milling cutter is tilted upward and directed toward the floor, and another part of the first local pre-cut surface (D2-D4) and part of the third local finishing surface (H1) on the base material layer (2) are cut and processed, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, so as to obtain a fourth local finishing surface (J3) and a sixth local pre-cut surface (J2-J3) on the base material layer (2); 7.2) The milling cutter is tilted downwardly and directed toward the floor, and another portion of the second overall pre-cut surface (B1-B5) on the balancing layer (1) and the base material layer (2) is cut and processed, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, so that a fifth local finishing surface (K1, K2, K5) is obtained on the balancing layer (1) and the base material layer (2), and a seventh local pre-cut surface (K3-K4) is obtained on the base material layer (2); 8) Further local refinement 8.1) Align the milling cutter vertically upward toward the floor, perform local finishing on the fourth local finishing surface (J3) and part of the sixth local pre-cut surface (J2) on the base material layer (2), and provide an overall cutting environment through a low-temperature spray device during the processing, so as to obtain the sixth local finishing surface (L1-L2) on the base material layer (2); 8.2) Align the milling cutter vertically with the floor, and perform fine trimming on the seventh local pre-cut surface (K3-K4) on the base material layer (2), and during the machining process, provide an overall cutting environment through a low-temperature spray device to obtain the seventh local fine trimming surface (M1-M2) on the base material layer (2); IX. Substrate layer (2) finishing 9.1) Tilt the milling cutter toward the floor, perform local finishing on another third local finishing surface (H2) on the base material layer (2), and provide an overall cutting environment through a low-temperature spray device during the processing, so as to obtain an eighth local finishing surface (N1) on the base material layer (2); 9.2) The milling cutter is tilted upward and directed toward the floor, and the second local finishing surface (G2) on the upper part of the base material layer (2) is finished, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, so as to obtain a ninth local finishing surface (O1) on the base material layer (2); 10) Overall and partial refinement 10.1) The milling cutter is arranged parallel to the floor, and the fourth local pre-cut surface (H4) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4) is partially fine-trimmed, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, and a tenth local fine-trimmed surface (P1) is obtained on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4); 10.2) Tilt the milling cutter toward the floor, and perform fine finishing on the fifth local pre-cut surface (I1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4), and provide an overall cutting environment through a low-temperature spray device during the processing, so as to obtain an eleventh local fine finishing surface (Q1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4); 11) Overall end finishing 11.1) The milling cutter is arranged parallel to the floor, and the tenth local finishing surface (P1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4) is locally finished, and during the processing, a low-temperature spray device is used to provide an overall cutting environment, so that the twelfth local finishing surface (R1) is obtained on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4); 11.2) Tilt the milling cutter toward the floor, and perform finishing on the eleventh local finishing surface (Q1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4), and during the processing, provide an overall cutting environment through a low-temperature spray device, and obtain a thirteenth local finishing surface (S1) on the base material layer (2), the decorative layer (3) and the wear-resistant layer (4).

2. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 1, characterized in that: In the steps 1) to 10), all cutting processes are reverse milling, while the cutting process in the step 11) is forward milling.

3. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 2, characterized in that: In the steps 3.1), 3.2), 4.1), 4.2), 5.2), 6.2), 7.1) and 7.2), the low temperature injection device realizes the low temperature environment by injecting supercritical CO2 gas.

4. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 3, characterized in that: In the steps 5.1), 6.1), 8.1), 8.2), 9.1), 9.2), 10.1), 10.2), 11.1) and 11.2), the low temperature spraying device realizes the low temperature environment by spraying lubricant.

5. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 1, 2, 3 or 4, characterized in that: In the step 3), during cutting, the cutting depth allowance is 1-1.5 mm.

6. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 5, characterized in that: In the step 4), during cutting, the cutting depth allowance is 0.4-0.7 mm.

7. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 1, 2, 3, 4 or 6, characterized in that: In the step 5.2), step 6) and step 7), during the cutting process, the cutting depth and processing allowance are both 0.1-0.2 mm.

8. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 7, characterized in that: In the step 10), during the cutting process, the cutting length allowance is 10 mm.

9. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 8, characterized in that: In the step 3.2), a portion of the second integral pre-cut surfaces (B2, B6) among the second integral pre-cut surfaces (B1-B7) are arc surfaces; In the step 4.1), a portion of the first local pre-cut surfaces (D6) among the first local pre-cut surfaces (D1-D8) is an arc surface; In the step 4.2), a part of the second partial pre-cut surfaces (E2) among the second partial pre-cut surfaces (E1-E2) is an arc surface; In the step 5.2), part of the second partial finishing surface (G2) in the second partial finishing surface (G2, G3) is an arc surface; In the step 6.1), another part of the third partial finishing surfaces (H2) in the third partial finishing surfaces (H1-H3) is an arc surface; In the step 7.2), a portion of the fifth partial finishing surfaces (K2) among the fifth partial finishing surfaces (K1, K2, K5) is an arc surface.

10. A low temperature processing method for locking buckles of stone plastic composite flooring according to claim 9, characterized in that: In the step 3.1), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least 3 forming milling cutters; In the steps 3.2), 4.2), 5.1), 6.1), 6.2), 7.2), 10.1), 10.2), 11.1) and 11.2), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least two forming milling cutters; In the steps 4.1), 5.2), 7.1), 8.1) and 9.1), the milling cutter is a vertical axis combined milling cutter, and the milling cutter is composed of at least one forming milling cutter.

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