Floor surface flame retardant treatment device and use method

Abstract

The invention discloses a floor surface flame-retardant treatment device and a using method, and relates to the technical field of flame-retardant floor manufacturing. A low-speed motor is mounted on the stirring kettle, and the temperature is 50-60 DEG C, so that a mixed material I is obtained; the screw extruder comprises a double-screw rod and a heating bin, and melt extrusion is carried out under three groups of temperature sections to obtain a mixed material II; the pre-pressing machine comprises a pre-pressing kettle, a constant-temperature layer is arranged in the pre-pressing kettle, a discharging opening is formed in the bottom of the pre-pressing kettle, and a double-roller forming shaft is installed at the top of the discharging opening; a pre-pressing rack is mounted at the bottom of the pre-pressing kettle; a shaping structure and a material pressing structure are further mounted on the upper conveying belt; a pre-pressed material is obtained; the calendaring forming machine comprises a protective shell, at least three sets of paired compression rollers are installed in the protective shell, and a pre-pressing material is suitable for passing through the paired compression rollers. And the finished product passing through the calendering forming machine enters the collecting box, so that the technical problems that the flame retardant and the base material are not uniformly mixed and the bonding strength is insufficient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flame-retardant floor manufacturing, and specifically to a device for surface flame-retardant treatment of floors and a method of use thereof. Background Art

[0002] As a renewable resource, wood has received increasing attention. However, the anisotropy of wood itself makes it prone to problems such as warping, cracking, flammability, perishability, and mildew during use, resulting in a short service life and thus limiting its application range. Therefore, in subsequent development, expansions have been made in directions including laminate floors, PVC floors, etc. For the flammable situation, some flame-retardant processes have currently been extended to floors. For example, in CN202221983976.1, a wood floor flame retardant spraying and conveying system, or in CN202410550901.1, a method for surface spraying treatment of flame-retardant wood floors, both use spraying flame retardant on wood to form a flame-retardant effect. For PVC floors, the flame retardant needs to be melt-extruded with the base material layer, so the spraying method is not suitable. Further, CN201910495305.7, a hot pressing device for PVC flame-retardant wood-plastic composites, prepares flame-retardant floors by hot pressing, but does not involve the preparation of the flame retardant and the base material layer. Further, existing floor surface flame-retardant treatment technologies mostly use coating or impregnation processes, but there are the following problems:

[0003] 1. Uneven dispersion of flame retardant: The traditional stirring process is difficult to achieve sufficient mixing of the flame retardant and the base material, resulting in unstable flame-retardant performance;

[0004] 2. Low process efficiency: Multi-step processing relies on manual intervention, the equipment coordination is poor, and the production cycle is long;

[0005] 3. Weak interlayer bonding force: The bonding strength between the flame-retardant layer and the base board is insufficient, and delamination or peeling is likely to occur;

[0006] 4. Inaccurate temperature control: The temperature gradient is unreasonable during the melt extrusion process, affecting the rheological properties of the material and the fiber reinforcement effect.

[0007] Therefore, we provide a device for surface flame-retardant treatment of floors and a method of use thereof to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to make up for the deficiencies of the prior art and provide a device for surface flame-retardant treatment of floors and a method of use thereof to solve the technical problems of uneven mixing of the flame retardant and the base material and insufficient bonding strength.

[0009] To solve the above technical problems, the present invention provides the following technical solutions:

[0010] A floor surface flame-retardant treatment system includes:

[0011] Stirring kettle, on which a low-speed motor is installed, and inside the stirring kettle is suitable for stirring and mixing raw materials at a temperature of 50 - 60 °C to obtain a first mixed material;

[0012] Screw extruder, which includes a double-screw rod and a heating chamber. The double-screw rod passes through the heating chamber and is suitable for mixing glass fibers in the first mixed material; it is melt-extruded under three temperature zones to obtain a second mixed material; the three temperature zones are: Temperature zone one: 160 - 165 °C, Temperature zone two: 170 - 175 °C, Temperature zone three: 175 - 180 °C;

[0013] Pre-pressing machine, including a pre-pressing kettle. Inside the pre-pressing kettle, there is a constant-temperature layer, and at the bottom, there is a discharge port. At the top of the discharge port, a pair-roll forming shaft is installed, and the pair-roll forming shaft is suitable for extruding a strip material from the second mixed material; at the bottom of the pre-pressing kettle, a pre-pressing frame is installed. The pre-pressing frame includes an upper conveyor belt and a lower conveyor belt. The upper conveyor belt conveys the strip material, and the lower conveyor belt conveys the base board; on the upper conveyor belt, there is also an shaping structure and a material pressing structure installed; the shaping structure is suitable for cutting the strip material, and the material pressing structure is suitable for pressing the strip material onto the base board to obtain a pre-pressed material;

[0014] Calendering forming machine, including a protective shell. Inside the protective shell, a pair of pressing rollers is installed, and there are at least three groups of the pair of pressing rollers. The pre-pressed material is suitable for passing through the pair of pressing rollers;

[0015] Collection box, and the finished product from the calendering forming machine enters the collection box.

[0016] In a further technical solution, a sealing cover is installed on the stirring kettle, a support frame is installed on the sealing cover, and a low-speed motor is installed on the support frame; an inlet pipe head is installed on the sealing cover, and an outlet pipe opening is arranged at the bottom of the stirring kettle;

[0017] The output end of the low-speed motor is provided with a stirring rod downward, and stirring blades are arranged on the stirring rod;

[0018] A discharge pipe is arranged at the bottom of the stirring kettle, and an electric butterfly valve is installed on the discharge pipe.

[0019] In a further technical solution, the screw extruder includes a left frame and a fixed box. A heating chamber is installed on the fixed box, and a double-screw rod is installed inside the heating chamber. A feeding port is arranged at the bottom side of the end of the heating chamber far away from the left frame; a feeding bin is installed at the top of the heating chamber; a feeding pump is installed on the left frame. One end of the feeding pump is connected to the outlet pipe opening through a pipeline, and the other end communicates with the feeding bin; the fixed box is suitable for heating up the inside of the heating chamber in different temperature zones.

[0020] In a further technical solution, a mounting plate is detachably installed at the bottom of the left frame. A driving motor is installed on the mounting plate, and a first belt pulley is installed at the output end of the driving motor. A speed reducer is installed inside the left frame. A second belt pulley is installed at one end of the speed reducer facing away from the heating chamber. The first belt pulley and the second belt pulley are connected by a conveyor belt. A protective shell is installed outside the first belt pulley and the second belt pulley.

[0021] The double-screw rod includes a first screw rod and a second screw rod. Spiral blades are provided in both the first screw rod and the second screw rod inside the heating chamber. An output shaft is provided on one side of the speed reducer facing the heating chamber, and a first transmission wheel is installed on the output shaft. A second transmission wheel is externally engaged with the first transmission wheel, and the second transmission wheel is connected to the second screw rod. The first screw rod and the second screw rod have opposite helix directions. The first screw rod is coaxially installed with the output shaft. The second screw rod is inserted into the heating chamber and is provided with two sets of output bearings.

[0022] In a further technical solution, a lateral inlet is also provided in the feed bin, and an electric switch valve is installed on the lateral inlet. The lateral inlet is suitable for introducing glass fiber, and the glass fiber is pre-impregnated with PVC paste resin.

[0023] In a further technical solution, a transfer pump is installed at the bottom of the discharge port and is connected to the inside of the pre-press autoclave. A necking part is provided at the bottom of the pre-press autoclave, and a pair-roll forming shaft is installed inside the necking part.

[0024] The pressing structure includes a first pressing frame and a second pressing frame. Both the first pressing frame and the second pressing frame are installed on the pre-press frame. A pair of inclined pressing rollers are installed in pairs inside the first pressing frame, and the pair of inclined pressing rollers are installed obliquely downward. A lower pressing roller is installed inside the second pressing frame, and the lower pressing roller is suitable for pressing the strip material against the conveyor belt.

[0025] In a further technical solution, the shaping structure includes a shaping frame, and the shaping frame is fixedly installed on the upper conveyor belt of the pre-press frame. The shaping frame is bent downward and a bidirectional lead screw is installed inside. A shaping motor is installed on the shaping frame, and the shaping motor is coaxially connected to the bidirectional lead screw. Two nut seats are installed on the bidirectional lead screw, and a scraper is detachably installed on the nut seat. An inclined plate is provided on the scraper.

[0026] In a further technical solution, an inclined conveyor belt and a horizontal conveyor belt are installed inside the protective shell. The inclined conveyor belt is suitable for conveying strip materials, and the horizontal conveyor belt conveys the base material plate. A fixed support plate is provided inside the protective shell. A pair of pressing rollers are vertically installed inside the fixed support plate, and a sealing top plate is installed through the top of the protective shell. An adjusting handle is installed on the sealing top plate, and an adjusting screw rod is installed inside the adjusting handle. The adjusting screw rod is suitable for adjusting the height of the pair of pressing rollers inside the protective shell.

[0027] In a further technical solution, an inclined track plate is provided at one end of the calendering machine away from the inclined conveyor belt, and an inclined conveyor belt is installed on the inclined track plate.

[0028] A method for using a flame retardant treatment system for the floor surface includes the following steps:

[0029] Step a. Stirring and premixing: Fill the PVC substrate, composite flame retardant, smoke suppressant, low-temperature plasticizer, and heat stabilizer into the stirring kettle. The stirring kettle drives the low-speed motor to drive the stirring rod to rotate, and mix them at a low speed at 50-60 °C for 10-15 minutes; then pump the mixed material one into the feed bin through the feed pump;

[0030] Step b. Melting and extrusion: Use a screw extruder for segmented temperature control, and the heating elements in the fixed box control the segmented temperature; start the drive motor to drive the first pulley to the second pulley to make the reduction box operate; the output end of the reduction box drives the first screw rod to rotate, and the meshing of the first transmission wheel and the second transmission wheel makes the second screw rod rotate; there is a restraint shell outside the first transmission wheel and the second transmission wheel;

[0031] The segmented temperature control includes the following: temperature section one 160-165 °C, temperature section two 170-175 °C, temperature section three 175-180 °C, and the extrusion pressure is 8-12 MPa;

[0032] Step c. Pass glass fiber into the side inlet. The glass fiber is pre-impregnated with PVC paste resin to form a prepreg;

[0033] Step d. Pump the molten mixed material two into the pre-pressing kettle, and stop the conveying pump when the internal weighing reaches the standard;

[0034] Step e. The pair of roll forming shafts rotate synchronously. By installing a forming motor outside the pre-pressing kettle, the forming motor is connected to the pair of roll forming shafts, and the pair of roll forming shafts rotate in opposite directions; the traction discharge position leads to the paired inclined extrusion rollers in the first pressing frame, and then through the lower pressing roller to the upper conveyor belt;

[0035] Step f. Pre-drive the shaping motor to determine the positions of the two groups of adjusting scrapers. The scrapers cut the strip material and discharge it to both sides through the inclined plate;

[0036] Step g. Convey the strip material to the inclined conveyor belt through the conveyor belt, and convey the base material plate to the horizontal conveyor belt; convey the strip material onto the base material plate and be extruded by at least three pairs of pressing rollers, and form an integrated structure after cooling; the calendering temperature is 120-135 °C, and the linear speed is 0.5-1.5 m / min;

[0037] Step h. Discharge through the inclined track plate into the collection box.

[0038] Compared with the prior art, the following beneficial effects are achieved:

[0039] In the present invention, the improvement of flame retardant performance is achieved through twin-screw extrusion in temperature zones (160 - 180°C) and glass fiber pre-impregnation process, ensuring uniform mixing of the flame retardant and the substrate, and significantly improving the flame retardant efficiency and stability. The integrated continuous production of stirring, extrusion, pre-pressing, and calendering is set up to reduce the process connection time, and the linear speed can reach 0.5 - 1.5 m / min, which is beneficial to mass production.

[0040] In the present invention, the pre-pressing machine uses the cooperative action of the inclined extrusion roller and the lower pressing roller to achieve extrusion, turning, and cutting into standard sizes, and then through the combination of three groups of calendering rollers for calendering forming, so that the flame retardant layer and the substrate board form a dense integrated structure.

[0041] In the present invention, through segmented temperature control, stirring at 50 - 60°C in the stirring kettle and calendering at 120 - 135°C in the calendering forming machine, and combined with automated components (electric butterfly valve, transfer pump), the rheology of the material and the forming quality are ensured.

[0042] In the present invention, the adjustable cutting size of the scraper shaping structure can adapt to different specifications of substrate boards, improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a front view of the floor surface flame retardant treatment system of the present invention;

[0044] Figure 2 is a schematic diagram of the structure of the stirring kettle of the present invention;

[0045] Figure 3 is a front view of the stirring kettle of the present invention;

[0046] Figure 4 is Figure 3 the A-A sectional view of;

[0047] Figure 5 is a schematic diagram of the structure of the screw extruder in the present invention;

[0048] Figure 6 is a side view of the screw extruder in the present invention;

[0049] Figure 7 is the B-B sectional view of 6;

[0050] Figure 8 is Figure 7 the enlarged view of part C of;

[0051] Figure 9 is a rear view of the pre-pressing machine of the present invention;

[0052] Figure 10 is a sectional view of the pre-pressing machine of the present invention;

[0053] Figure 11 Side schematic view of the shaping structure of the present invention;

[0054] Figure 12 Schematic structural view of the calendering machine of the present invention;

[0055] Figure 13 Cross-sectional schematic view of the calendering machine of the present invention.

[0056] In the figure:

[0057] 1. Stirring kettle; 11. Low-speed motor; 12. Sealing cover; 13. Support frame; 14. Inlet pipe head; 15. Outlet pipe orifice; 16. Stirring rod; 17. Electric butterfly valve;

[0058] 2. Screw extruder; 22. Heating chamber; 23. Left frame; 24. Fixed box; 25. Feeding opening; 26. Feed bin; 27. Feed pump; 28. Mounting plate; 29. Driving motor; 210. Pulley one; 211. Reducing box; 212. Pulley two; 213. Protective shell; 214. Screw rod one; 215. Screw rod two; 216. Driving wheel one; 217. Driving wheel two; 218. Lateral inlet; 219. Electric switch valve;

[0059] 3. Pre-pressing machine; 31. Pre-pressing kettle; 32. Constant temperature layer; 33. Opposing roll forming shaft; 34. Pre-pressing frame; 35. Upper conveyor belt; 36. Lower conveyor belt;

[0060] 4. Substrate board;

[0061] 5. Shaping structure; 51. Shaping frame; 52. Bi-directional lead screw; 53. Shaping motor; 54. Nut seat; 55. Scraper; 551. Inclined plate;

[0062] 6. Pressing material structure; 61. Pressing material frame one; 62. Pressing material frame two; 63. Inclined extrusion roller; 64. Lower pressing roller;

[0063] 7. Calendering machine; 71. Protective shell; 72. Pair of pressing rollers; 73. Inclined conveyor belt; 74. Horizontal conveyor belt; 75. Fixed support plate; 76. Sealing top plate; 77. Adjusting handle; 78. Inclined track plate;

[0064] 8. Collection box. Specific embodiments

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0066] Embodiment 1

[0067] Please refer to Figure 1 、 9 -13, a technical solution provided by the present invention is as follows:

[0068] A flame-retardant treatment system for the floor surface, comprising:

[0069] A stirring kettle 1, on which a low-speed motor 11 is arranged, and the raw materials are suitable for being stirred and mixed in the stirring kettle 1 at a temperature of 50-60 °C to obtain a first mixed material;

[0070] A screw extruder 2, which includes a double screw and a heating chamber 22. The double screw passes through the heating chamber 22 and is suitable for mixing glass fibers in the first mixed material; it is melt-extruded under three temperature sections to obtain a second mixed material; the three temperature sections are: temperature section one: 160-165 °C, temperature section two: 170-175 °C, temperature section three: 175-180 °C;

[0071] A pre-pressing machine 3, which includes a pre-pressing kettle 31. A constant temperature layer 32 is arranged in the pre-pressing kettle 31, and a discharge port is arranged at the bottom. A pair of roller forming shafts 33 are installed at the top of the discharge port. The pair of roller forming shafts 33 are suitable for extruding strip materials from the second mixed material; a pre-pressing frame 34 is installed at the bottom of the pre-pressing kettle 31. The pre-pressing frame 34 includes an upper conveyor belt 35 and a lower conveyor belt 36. The upper conveyor belt 35 conveys the strip materials, and the lower conveyor belt 36 conveys the base material board 4; a shaping structure 5 and a material pressing structure 6 are also installed on the upper conveyor belt 35; the shaping structure 5 is suitable for cutting the strip materials, and the material pressing structure 6 is suitable for pressing the strip materials on the base material board 4 to obtain a pre-pressed material;

[0072] A calendering and forming machine 7, which includes a protective shell 71. A pair of calendering rollers 72 are installed in the protective shell 71, and at least three groups of pairs of calendering rollers 72 are provided. The pre-pressed material is suitable for passing through the pair of calendering rollers 72;

[0073] A collection box 8, and the finished product from the calendering and forming machine 7 enters the collection box 8.

[0074] The blank holding structure 6 includes a first blank holder 61 and a second blank holder 62. Both the first blank holder 61 and the second blank holder 62 are installed on the pre-pressing frame 34. In the first blank holder 61, a pair of inclined extrusion rollers 63 are installed in pairs, and the pair of inclined extrusion rollers 63 are installed obliquely downward; in the second blank holder 62, a downward pressing roller 64 is installed, and the downward pressing roller 64 is adapted to press the strip material against the conveyor belt 35.

[0075] As Figure 11 shown, the shaping structure 5 includes a shaping frame 51. The shaping frame 51 is fixedly installed on the upper conveyor belt 35 of the pre-pressing frame 34; the shaping frame 51 is bent downward and a bidirectional lead screw 52 is installed inside. A shaping motor 53 is installed on the shaping frame 51, and the shaping motor 53 is coaxially connected to the bidirectional lead screw 52; two sets of nut seats 54 are installed on the bidirectional lead screw 52, and a scraper 55 is detachably installed on the nut seat 54, and an inclined plate 551 is provided on the scraper 55.

[0076] As Figure 12 and 13 shown, an inclined conveyor belt 73 and a horizontal conveyor belt 74 are installed in the protective shell 71. The inclined conveyor belt 73 is adapted to convey the strip material, and the horizontal conveyor belt 74 conveys the base material plate 4; a fixed support plate 75 is provided in the protective shell 71, and a pair of pressing rollers 72 are vertically installed in the fixed support plate 75, and a sealing top plate 76 is installed through the top of the protective shell 71. An adjusting handle 77 is installed on the sealing top plate 76, and an adjusting screw is installed in the adjusting handle 77. The adjusting screw is adapted to adjust the height of the pair of pressing rollers 72 in the protective shell 71. At one end of the calendering machine 7 away from the inclined conveyor belt 73, an inclined track plate 78 is provided, and the inclined conveyor belt 73 is installed on the inclined track plate 78. In the present invention, through the cooperation of the inclined extrusion roller and the downward pressing roller by the pre-pressing machine, extrusion, turning, and cutting into standard sizes are realized, and then through the combination of three sets of pressing rollers for calendering, a dense integrated structure is formed between the flame retardant layer and the base material plate; by installing a heating device at the bottom of the calendering machine, the temperature range for calendering is ensured to be between 120 and 135 °C. The heating device can be an existing heating method, using an electric heating tape or an electric heating wire for heating, and a temperature controller for temperature control, and heat conduction is carried out through air or liquid.

[0077] Embodiment 2

[0078] As Figures 2 - 4 , which is another implementation scheme of the present invention. On the basis of Embodiment 1, in order to realize the uniform mixing and stirring of the flame retardant, a sealing cover 12 is installed on the stirring kettle 1, a support frame 13 is installed on the sealing cover 12, and a low-speed motor 11 is installed on the support frame 13; an inlet pipe head 14 is installed on the sealing cover 12, and an outlet pipe orifice 15 is provided at the bottom of the stirring kettle 1;

[0079] The output end of the low-speed motor 11 is provided with a stirring rod 16 downward, and stirring blades are arranged on the stirring rod 16;

[0080] A discharge pipe is arranged at the bottom of the stirring kettle 1, and an electric butterfly valve 17 is installed on the discharge pipe.

[0081] Embodiment 3

[0082] As Figures 5 - 8 shown, this is another implementation of the present invention. On the basis of Embodiment 1, in order to achieve the melting and extrusion effect, the screw extruder 2 includes a left frame 23 and a fixed box 24. A heating chamber 22 is installed on the fixed box 24, and a double-screw rod is installed in the heating chamber 22. A material discharge port 25 is arranged at the bottom side of the end of the heating chamber 22 far from the left frame 23; a feed bin 26 is installed on the top of the heating chamber 22; a feed pump 27 is installed on the left frame 23. One end of the feed pump 27 is connected to the outlet pipe orifice 15 through a pipeline, and the other end communicates with the feed bin 26; the fixed box 24 is adapted to raise the temperature in the heating chamber 22 in temperature sections.

[0083] As Figure 5 shown, the bottom of the left frame 23 is detachably installed with a mounting plate 28, a driving motor 29 is installed on the mounting plate 28, and a pulley one 210 is installed at the output end of the driving motor 29; a reduction box 211 is installed in the left frame 23, and a pulley two 212 is installed at one end of the reduction box 211 facing away from the heating chamber 22. The pulley one 210 and the pulley two 212 are connected by a conveyor belt; a protective shell 213 is installed outside the pulley one 210 and the pulley two 212;

[0084] The double-screw rod includes a screw rod one 214 and a screw rod two 215. Spiral blades are arranged in the heating chamber 22 for both the screw rod one 214 and the screw rod two 215; an output shaft is arranged on one side of the reduction box 211 facing the heating chamber 22, and a driving wheel one 216 is installed on the output shaft; a driving wheel two 217 is externally engaged with the driving wheel one 216, and the driving wheel two 217 is connected to the screw rod two 215; the screw rod one 214 and the screw rod two 215 have opposite helix directions, where the helix direction refers to the rotation direction; the screw rod one 214 is coaxially installed with the output shaft; the screw rod two 215 is inserted into the heating chamber 22 and is installed with two groups of output bearings. By driving the pulley one with the driving motor, the pulley one drives the pulley two through the conveyor belt to drive the reduction box to operate. The output end of the reduction box drives the driving wheel one and the driving wheel two to rotate through the output shaft, so as to realize that the rotation directions of the two screw rods are opposite during movement, and the opposite helix directions of the screw rod one and the screw rod two realize extrusion and advance to the material discharge port along with the spiral blades for discharging materials.

[0085] Combined with Figure 5 and Figure 6As shown, a lateral inlet 218 is also provided in the feed bin 26, and an electric switch valve 219 is installed on the lateral inlet 218; the lateral inlet 218 is adapted to introduce fiberglass, and the fiberglass is pre-impregnated with PVC paste resin. A transfer pump 9 is installed at the bottom of the discharge port 25 and is connected to the pre-pressing kettle 31; a necking portion is provided at the bottom of the pre-pressing kettle 31, and a pair of roll forming shafts 33 are installed in the necking portion;

[0086] A method for using a flame retardant treatment system for the floor surface includes the following steps:

[0087] Step a. Stirring and premixing: Fill the PVC substrate, composite flame retardant, smoke suppressant, low-temperature plasticizer, and heat stabilizer into the stirring kettle 1. The stirring kettle 1 drives the low-speed motor 11 to drive the stirring rod 16 to rotate, and mix at a low speed at 50-60°C for 10-15 minutes; then pump the mixed material one into the feed bin 26 through the feed pump 27;

[0088] Step b. Melting and extrusion: The screw extruder 2 is controlled by segmented temperature, and the heating elements in the fixed box 24 control the segmented temperature; start the drive motor 29 to drive the pulley one 210 to the pulley two 212 to make the speed reducer 211 operate; the output end of the speed reducer 211 drives the screw rod one 214 to rotate, and the meshing of the transmission wheel one 216 and the transmission wheel two 217 causes the screw rod two 215 to rotate; a restraint shell is provided outside the transmission wheel one 216 and the transmission wheel two 217;

[0089] The segmented temperature control includes the following: temperature section one 160-165°C, temperature section two 170-175°C, temperature section three 175-180°C, and the extrusion pressure is 8-12 MPa;

[0090] Step c. Introduce fiberglass into the lateral inlet 218, and the fiberglass is pre-impregnated with PVC paste resin to form a prepreg;

[0091] Step d. Pump the molten mixed material two into the pre-pressing kettle 31, and stop the operation of the transfer pump 9 after reaching the standard through internal weighing;

[0092] Step e. The pair of roll forming shafts 33 rotate synchronously. A forming motor is installed outside the pre-pressing kettle 31, and the forming motor is connected to the pair of roll forming shafts 33, and the pair of roll forming shafts 33 rotate in opposite directions; the traction discharge position leads to the paired inclined extrusion rollers 63 in the pressing frame one 61, and then through the lower pressing roller 64 to the upper conveyor belt 35;

[0093] Step f. Pre-drive the shaping motor 53 to determine the positions of the two groups of adjusting scrapers 55. The scrapers 55 cut the strip-shaped material and discharge it to both sides through the inclined plate 551;

[0094] Step g. Convey the strip material to the inclined conveyor belt 73 through the conveyor belt, and convey the base material plate 4 to the horizontal conveyor belt 74; convey the strip material onto the base material plate 4, and it is extruded by at least three pairs of pressure rollers 72 and forms an integrated structure after cooling; the calendering temperature is 120 - 135 °C, and the linear speed is 0.5 - 1.5 m / min; the cooling method is natural cooling;

[0095] Step h. Discharge through the inclined track plate 78 into the collection box 8.

[0096] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

[0097] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A floor surface flame retardant treatment system, characterized in that: Including: A stirring kettle (1) is installed with a low-speed motor (11). Inside the stirring kettle (1), it is suitable for stirring and mixing raw materials at a temperature of 50 - 60 °C to obtain a first mixed material. A screw extruder (2) includes a double screw and a heating chamber (22). The double screw passes through the heating chamber (22) and is suitable for mixing glass fibers into the first mixed material. It is melt-extruded under three temperature sections to obtain a second mixed material. The three temperature sections are: Temperature section one: 160 - 165 °C, Temperature section two: 170 - 175 °C, Temperature section three: 175 - 180 °C. A pre-pressing machine (3) includes a pre-pressing kettle (31). Inside the pre-pressing kettle (31), there is a constant temperature layer (32), and at the bottom, there is a discharge port. At the top of the discharge port, there is a pair of roller forming shafts (33) which are suitable for extruding a strip material from the second mixed material. At the bottom of the pre-pressing kettle (31), a pre-pressing frame (34) is installed. The pre-pressing frame (34) includes an upper conveyor belt (35) and a lower conveyor belt (36). The upper conveyor belt (35) conveys the strip material, and the lower conveyor belt (36) conveys a base material plate (4). On the upper conveyor belt (35), there are also installed a shaping structure (5) and a material pressing structure (6). The shaping structure (5) is suitable for cutting the strip material, and the material pressing structure (6) is suitable for pressing the strip material onto the base material plate (4) to obtain a pre-pressed material. A calendering and forming machine (7) includes a protective shell (71). Inside the protective shell (71), there are at least three pairs of pressing rollers (72). The pre-pressed material is suitable for passing through the pairs of pressing rollers (72). A collection box (8) into which the finished product from the calendering and forming machine (7) enters.

2. The flame retardant treatment system for the floor surface according to claim 1, wherein: On the stirring kettle (1), there is a sealing cover (12). On the sealing cover (12), there is a support frame (13), and on the support frame (13), there is a low-speed motor (11). On the sealing cover (12), there is an inlet pipe head (14), and at the bottom of the stirring kettle (1), there is an outlet pipe orifice (15). The output end of the low-speed motor (11) is installed with a stirring rod (16) downward, and on the stirring rod (16), there are stirring blades. At the bottom of the stirring kettle (1), there is a discharge pipe, and on the discharge pipe, there is an electric butterfly valve (17).

3. According to the floor surface flame retardant treatment system described in claim 2, characterized in that The screw extruder (2) includes a left frame (23) and a fixed box (24). On the fixed box (24), there is a heating chamber (22), and inside the heating chamber (22), there is a double screw. At the bottom side of the end of the heating chamber (22) away from the left frame (23), there is a blanking port (25). On the top of the heating chamber (22), there is a feed bin (26). On the left frame (23), there is a feed pump (27). One end of the feed pump (27) is connected to the outlet pipe orifice (15) through a pipeline, and the other end communicates with the feed bin (26). The fixed box (24) is suitable for heating the inside of the heating chamber (22) in temperature sections.

4. A floor surface flame retardant treatment system according to claim 2, wherein, A mounting plate (28) is detachably installed at the bottom of the left frame (23). A driving motor (29) is installed on the mounting plate (28), and a first pulley (210) is installed at the output end of the driving motor (29); A speed reducer (211) is installed in the left frame (23), and a second pulley (212) is installed at one end of the speed reducer (211) facing away from the heating chamber (22). The first pulley (210) and the second pulley (212) are connected by a conveyor belt; A protective shell (213) is installed outside the first pulley (210) and the second pulley (212); The double screw rod includes a first screw rod (214) and a second screw rod (215). The first screw rod (214) and the second screw rod (215) are both provided with spiral blades in the heating chamber (22); An output shaft is provided on one side of the speed reducer (211) facing the heating chamber (22), and a first transmission wheel (216) is installed on the output shaft; A second transmission wheel (217) is externally engaged with the first transmission wheel (216), and the second transmission wheel (217) is connected to the second screw rod (215); The first screw rod (214) and the second screw rod (215) have opposite helix directions; The first screw rod (214) is coaxially installed with the output shaft; The second screw rod (215) is inserted into the heating chamber (22) and is provided with two sets of output bearings.

5. The floor surface flame retardant treatment system according to claim 4, characterized in that, A lateral inlet (218) is further provided in the feed bin (26), and an electric switch valve (219) is installed on the lateral inlet (218); The lateral inlet (218) is adapted to introduce glass fiber, and the glass fiber is pre-impregnated with PVC paste resin.

6. The surface flame retardant treatment system for a floor according to claim 4, characterized in that, A transfer pump (9) is installed at the bottom of the discharge port (25) and is communicated into the pre-press kettle (31); The bottom of the pre-press kettle (31) is provided with a necking part, and a pair of roll forming shafts (33) are installed in the necking part; The pressing structure (6) includes a first pressing frame (61) and a second pressing frame (62). The first pressing frame (61) and the second pressing frame (62) are both installed on the pre-press frame (34). A pair of inclined pressing rollers (63) are installed in the first pressing frame (61) in pairs, and the pair of inclined pressing rollers (63) are installed obliquely downward; A lower pressing roller (64) is installed in the second pressing frame (62), and the lower pressing roller (64) is adapted to press the strip material against the conveyor belt (35).

7. A floor surface flame retardant treatment system according to claim 4, wherein, The shaping structure (5) includes a shaping frame (51), and the shaping frame (51) is fixedly installed on the conveyor belt (35) of the pre-press frame (34); The shaping frame (51) is bent downward and a bidirectional lead screw (52) is installed inside. A shaping motor (53) is installed on the shaping frame (51), and the shaping motor (53) is coaxially connected to the bidirectional lead screw (52); Two sets of nut seats (54) are installed on the bidirectional lead screw (52), and a scraper (55) is detachably installed on the nut seat (54), and an inclined plate (551) is installed on the scraper (55).

8. A floor surface flame retardant treatment system according to claim 4, characterized in that, Inside the protective housing (71), an inclined conveyor belt (73) and a horizontal conveyor belt (74) are installed. The inclined conveyor belt (73) is suitable for conveying strip materials, and the horizontal conveyor belt (74) conveys the base substrate plate (4). Inside the protective housing (71), a fixed support plate (75) is installed. Inside the fixed support plate (75), a pair of compression rollers (72) are installed vertically. And at the top, a sealing top plate (76) is installed through the protective housing (71). An adjustment handle (77) is installed on the sealing top plate (76). An adjustment screw is installed inside the adjustment handle (77), and the adjustment screw is suitable for adjusting the height of the pair of compression rollers (72) inside the protective housing (71).

9. A floor surface flame retardant treatment system according to claim 8, characterized in that, At one end of the calendering machine (7) far from the inclined conveyor belt (73), an inclined track plate (78) is installed, and the inclined conveyor belt (73) is installed on the inclined track plate (78).

10. A method of using a flame retardant treatment system for a floor surface, characterized in that, It includes the following steps: Step a. Stirring and premixing: Fill the PVC base material, compound flame retardant, smoke suppressant, low-temperature plasticizer, and heat stabilizer into the stirring kettle (1). The stirring kettle (1) drives the low-speed motor (11) to drive the stirring rod (16) to rotate, and mix at a low speed at 50 - 60 °C for 10 - 15 minutes. Then, pump the mixed material one into the feed bin (26) through the feed pump (27). Step b. Melting and extrusion: Use the screw extruder (2) for segmented temperature control. The heating elements in the fixed box (24) control the segmented temperature. Start the drive motor (29) to drive the pulley one (210) to the pulley two (212), so that the reduction box (211) operates. The output end of the reduction box (211) drives the spiral rod one (214) to rotate. The meshing of the transmission wheel one (216) and the transmission wheel two (217) causes the spiral rod two (215) to rotate. A restraint shell is installed outside the transmission wheel one (216) and the transmission wheel two (217). The segmented temperature control includes the following: temperature section one 160 - 165 °C, temperature section two 170 - 175 °C, temperature section three 175 - 180 °C, and the extrusion pressure is 8 - 12 MPa. Step c. Pass glass fiber into the side inlet (218). The glass fiber is pre-impregnated with PVC paste resin to form a prepreg. Step d. Pump the molten mixed material two into the pre-pressing kettle (31). After reaching the standard through internal weighing, stop the operation of the transfer pump (9). Step e. The pair of roll forming shafts (33) rotate synchronously. By installing a forming motor outside the pre-pressing kettle (31), the forming motor is connected to the pair of roll forming shafts (33), and the pair of roll forming shafts (33) rotate in the opposite direction. The traction discharge position leads to the pair of inclined extrusion rollers (63) inside the pressing frame one (61), and then through the lower pressing roller (64) to the upper conveyor belt (35). Step f. Pre-drive the shaping motor (53) to determine the positions of the two groups of adjusting scrapers (55). The scrapers (55) cut the strip material and discharge it to both sides through the inclined plate (551). Step g. Convey the strip material to the inclined conveyor belt (73), and convey the base material plate (4) to the horizontal conveyor belt (74); convey the strip material onto the base material plate (4), and it is extruded by at least three pairs of pressure rollers (72) and forms an integrated structure after cooling; the calendering temperature is 120 to 135 °C, and the linear speed is 0.5 to 1.5 m / min; Step h. Discharge through the inclined track plate (78) into the collection box (8).

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