A modified PP sheet and its manufacturing method and equipment

Abstract

A modified PP sheet material and a manufacturing method and equipment thereof, comprising a PP sheet surface layer, a PP sheet base layer and an intermediate layer, wherein the PP sheet surface layer and the PP sheet base layer are both modified PP sheets, the intermediate layer is arranged between the PP sheet surface layer and the PP sheet base layer, and the PP sheet surface layer, the PP sheet base layer and the intermediate layer are hot-pressed and integrally formed; the PP sheet material is made of PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant as raw materials; the invention has the characteristics of heat preservation, sound insulation, corrosion resistance, good electrical insulation performance, high impact resistance and tensile strength, excellent heat resistance, and no deformation in a high temperature environment exceeding 100°C, thereby improving the heat resistance and service life of the modified PP sheet material, and having good chemical corrosion resistance and coloring performance; the constituent raw materials of the invention have the performance of safety and environmental protection; the prepared PP sheet material has uniform width and thickness, stable shape, stable quality and good processing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of PP sheet manufacturing, and in particular to a modified PP sheet and a manufacturing method and equipment thereof. Background Art

[0002] Polypropylene (PP) is a highly crystalline material with a high melting point, low price, and excellent physical and chemical properties: chemical resistance, excellent electrical insulation, good mechanical strength and good processing and molding. It is widely used in automotive, electrical, mechanical, radio, textile and other engineering accessories, daily necessities, turnover boxes, medical and health equipment, construction and other materials.

[0003] Polypropylene, a thermoplastic resin made from the polymerization of propylene, is a non-toxic, odorless, milky white, highly crystalline polymer. It is one of the lightest plastics currently available. It has excellent water stability, outstanding resistance to bending fatigue, and good heat resistance, chemical stability, and electrical properties. It can also be used directly in food packaging.

[0004] In recent years, with the rapid development of my country's home appliance industry, PP has been widely used due to its excellent properties. Although PP has the above-mentioned excellent properties and has been widely used in the home appliance industry, PP products currently generally have the disadvantages of poor thermal insulation, sound insulation, corrosion resistance, electrical insulation performance, impact resistance and low tensile strength. They are easily deformed when subjected to high temperature environments exceeding 100°C, which reduces their service life, and they do not have good chemical corrosion resistance and coloring properties. As a result, the width and thickness of the PP sheets produced are uneven, and the shape and quality are unstable, which is not conducive to processing. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a modified PP sheet and a manufacturing method thereof to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A modified PP sheet comprises a PP sheet surface layer, a PP sheet base layer, and an intermediate layer, wherein the PP sheet surface layer and the PP sheet base layer are both modified PP sheets, the intermediate layer is disposed between the PP sheet surface layer and the PP sheet base layer, and the PP sheet surface layer, the PP sheet base layer, and the intermediate layer are integrally formed by hot pressing; the modified PP sheet is made of PP resin, polystyrene, a toughening agent, an inorganic mineral filler, a dispersant, a lubricant, an antioxidant, and a colorant as raw materials, wherein the components are mixed in the following parts by weight:

[0008] 40-50 parts of PP resin

[0009] 8-10 parts polystyrene

[0010] 5-10 parts toughening agent

[0011] 10-15 parts of inorganic mineral filler

[0012] 1 to 3 parts dispersant

[0013] 1 to 3 parts lubricant

[0014] 1-3 parts antioxidant

[0015] 5 to 7 parts of pigment.

[0016] Preferably, the outer surface of the PP sheet surface layer is pressed with convex and concave anti-slip patterns, and the thickness of the PP sheet base layer is equal to that of the PP sheet surface layer.

[0017] A method for manufacturing a modified PP sheet comprises the following steps:

[0018] Step 1: Weigh the corresponding PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant raw materials according to the ratio;

[0019] Step 2: Add PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant into the hopper of the extruder and mix them into a mixture;

[0020] Step 3: Plasticize and extrude the mixture through a twin-screw extruder to obtain a primary PP sheet product.

[0021] Step 4: The finished PP sheet is passed through a three-roller forming machine for surface treatment and cooled to shape;

[0022] Step 5: The surface of the PP sheet after the shaping treatment in step 4 is pressed with convex and concave anti-slip patterns;

[0023] Step 6: Place the middle layer between the PP sheet treated with the convex and concave anti-slip patterns and the untreated PP sheet pre-finished product, hot-press and co-extrude to obtain the modified PP sheet product, and then roll and package it.

[0024] Preferably, twin-screw extruder is used for extrusion, and the temperature of each zone of the extruder is: zone 1 150°C, zone 2 160°C, zone 3 175°C, zone 4 180°C, zone 5 180°C, zone 6 180°C, zone 7 180°C, zone 8 180°C, zone 9 190°C, and die head 180°C.

[0025] A manufacturing device for modified PP sheet, comprising a metering and feeding device, a mixing device, a twin-screw extruder, a cooling and shaping device, an embossing roller, a pressure roller, a hot pressing and forming device, and a winding device. The metering and feeding devices are provided in plurality, and the outlet end of each metering and feeding device is connected to the inlet end of the mixing device, and the outlet end of the mixing device is connected to the inlet end of the twin-screw extruder. The cooling and shaping device is provided at the outlet of the twin-screw extruder. The embossing roller cooperates with the pressure roller to press the surface layer of the PP sheet. The hot pressing and forming device is used to hot-press and co-extrude the surface layer, the base layer, and the intermediate layer of the PP sheet to obtain a finished modified PP sheet. The winding device is used to roll and package the finished hot-pressed PP sheet.

[0026] Preferably, the mixing device comprises an outer shell, and a plurality of inclined plates are alternately arranged on both sides of the inner cavity of the outer shell, elastic pads are installed on the upper surfaces of the inclined plates, and first springs are evenly installed between the elastic pads and the inclined plates.

[0027] The transmission gear of the motor is engaged with the gear of the motor and the gear is engaged with the gear of the motor, and the gear is connected with the gear of the motor to the rotor and the gear is connected with the gear of the motor to the rotor, and the gear is connected with the gear of the motor to the rotor, and the gear is connected with the gear of the motor to the rotor.

[0028] The adjusting block is provided with a movable groove, an adjusting plate is slidably installed in the movable groove, an elliptical slide groove is provided on the adjusting plate, a plurality of teeth are fixedly installed on the adjusting plate, one end of the driving shaft extends into the elliptical slide groove and is slidably connected to the elliptical slide groove, a gear is fixedly installed on the driving shaft, and the gear is engaged with the teeth;

[0029] Three shaping rollers are fixedly installed in the cooling box, a guide roller is fixedly installed on the base, and a PP sheet surface layer is wound around the guide roller and the three shaping rollers.

[0030] Preferably, the embossing roller comprises an embossing roller and an embossing roller sleeve, the outer surface of the embossing roller is evenly provided with card grooves, the inner surface of the embossing roller sleeve is fixedly connected with a card strip; the embossing roller sleeve is movably connected to the outer surface of the embossing roller and is limited by the cooperation between the card strip and the card groove; the outer surfaces of both ends of the embossing roller are provided with threaded connection parts, and the two ends of the embossing roller are movably connected with fixing nuts through the threaded connection parts, and the two ends of the embossing roller sleeve are limited and fixed by the fixing nuts;

[0031] The pressure roller cooperates with the embossing roller sleeve to press the surface layer of the PP sheet. A pressure roller shaft is provided in the middle of the pressure roller. The pressure roller is movably connected to the outer surface of the pressure roller shaft. Both ends of the pressure roller shaft are connected to the upper end of the pressure frame through a connecting frame. The lower end of the pressure frame is rotatably connected to the hinge seat through a bearing seat. The hinge seat is fixedly connected to one end of the second spring on the side close to the pressure roller, and the other end of the second spring is fixedly installed above the pressure frame.

[0032] Preferably, the hot pressing forming device includes an upper hot pressing roller, a lower hot pressing roller and a pressing roller frame, and mounting pillars are fixedly installed on both sides of the pressing roller frame, and two waist-shaped holes are respectively provided on the surface of the mounting pillars, and the upper and lower hot pressing rollers are connected with second roller shafts at both ends, and the second roller shafts pass through the two waist-shaped holes and are movably connected to the waist-shaped holes. The outer surface of each second roller shaft is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the lead screw nut, and the lead screw nut is movably connected to the outer surface of the lead screw through a thread, and one end of the lead screw is connected to the lead screw motor through a coupling, and the lead screw motor is fixedly installed on the side surface of the pressing roller frame, and the other end of the lead screw is movably connected to the side surface of the pressing roller frame through a bearing.

[0033] The present invention provides a modified PP sheet and a method and apparatus for manufacturing the same. The invention has the following beneficial effects: It exhibits thermal insulation, sound insulation, corrosion resistance, good electrical insulation, impact resistance, and high tensile strength. It also exhibits excellent heat resistance and withstands high temperatures exceeding 100°C without deformation, thereby improving the heat resistance and service life of the modified PP sheet. Furthermore, the sheet exhibits excellent chemical corrosion resistance and coloring properties. The raw materials used in the invention are safe and environmentally friendly. The resulting PP sheet exhibits uniform width and thickness, stable shape, consistent quality, and excellent processing properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the prior art.

[0035] Figure 1 Schematic diagram of the structure of the PP sheet of the present invention;

[0036] Figure 2It is a structural schematic diagram of the PP sheet manufacturing equipment of the present invention;

[0037] Figure 3 Schematic diagram of the structure of the mixing device in the PP sheet manufacturing equipment of the present invention;

[0038] Figure 4 It is a structural schematic diagram of the cooling and shaping device in the PP sheet manufacturing equipment of the present invention;

[0039] Figure 5 for Figure 4 A partial enlarged view of point A in the middle;

[0040] Figure 6 This is a side structural diagram of the adjustment block of the cooling and shaping device in the PP sheet manufacturing equipment of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the embossing roller in the PP sheet manufacturing equipment of the present invention;

[0042] Figure 8 It is a schematic structural diagram of the pressure roller in the PP sheet manufacturing equipment of the present invention;

[0043] Figure 9 It is a structural schematic diagram of the hot pressing forming device in the PP sheet manufacturing equipment of the present invention; DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Example

[0045] like Figure 1 As shown, a modified PP sheet comprises a PP sheet surface layer 1, a PP sheet base layer 2 and an intermediate layer 3. The PP sheet surface layer 1 and the PP sheet base layer 2 are both modified PP sheets, and the outer surface of the PP sheet surface layer 1 is pressed with convex and concave anti-slip patterns. The PP sheet base layer 2 is a modified PP sheet and has the same thickness as the PP sheet surface layer 1. The intermediate layer 3 is arranged between the PP sheet surface layer 1 and the PP sheet base layer 2. The intermediate layer 3 is an EVA film or a polyurethane hot melt film. The PP sheet surface layer 1, the PP sheet base layer 2 and the intermediate layer 3 are hot-pressed into one piece. The modified PP sheet is made of PP resin, polystyrene, a toughening agent, an inorganic mineral filler, a dispersant, a lubricant, an antioxidant and a colorant as raw materials, and each component is mixed according to the following weight parts:

[0046] 40 parts of PP resin

[0047] 8 parts polystyrene

[0048] 5 parts toughening agent

[0049] 10 parts of inorganic mineral filler

[0050] 1 part dispersant

[0051] 1 part lubricant

[0052] 1 part antioxidant

[0053] 5 parts of pigment.

[0054] A method for manufacturing a modified PP sheet comprises the following steps:

[0055] Step 1: Weigh the corresponding PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant raw materials according to the ratio;

[0056] Step 2: Add PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant into the hopper of the extruder and mix them into a mixture;

[0057] Step 3: Plasticize and extrude the mixture through a twin-screw extruder to obtain a primary PP sheet. The extruder is extruded using a twin-screw extruder with the following zone temperatures: Zone 1 150°C, Zone 2 160°C, Zone 3 175°C, Zone 4 180°C, Zone 5 180°C, Zone 6 180°C, Zone 7 180°C, Zone 8 180°C, Zone 9 190°C, and the die head 180°C.

[0058] Step 4: The finished PP sheet is passed through a three-roller forming machine for surface treatment and cooled to shape;

[0059] Step 5: The surface of the PP sheet after the shaping treatment in step 4 is pressed with convex and concave anti-slip patterns;

[0060] Step 6: Place the middle layer 3 between the PP sheet treated with the convex and concave anti-slip patterns and the untreated PP sheet pre-finished product, hot-press and co-extrude them to obtain the modified PP sheet product, and then roll and package it. Example

[0061] A modified PP sheet comprises a PP sheet surface layer 1, a PP sheet base layer 2, and an intermediate layer 3. The PP sheet surface layer 1 and the PP sheet base layer 2 are both modified PP sheets, and the outer surface of the PP sheet surface layer 1 is pressed with convex and concave anti-slip patterns. The PP sheet base layer 2 is a modified PP sheet and has the same thickness as the PP sheet surface layer 1. The intermediate layer 3 is arranged between the PP sheet surface layer 1 and the PP sheet base layer 2, and the intermediate layer 3 is an EVA film or a polyurethane hot melt film. The PP sheet surface layer 1, the PP sheet base layer 2, and the intermediate layer 3 are integrally formed by hot pressing. The modified PP sheet is made of PP resin, polystyrene, a toughening agent, an inorganic mineral filler, a dispersant, a lubricant, an antioxidant, and a colorant as raw materials, and the components are mixed in the following parts by weight:

[0062] 50 parts of PP resin

[0063] 10 parts polystyrene

[0064] 10 parts toughening agent

[0065] 15 parts of inorganic mineral filler

[0066] 3 parts dispersant

[0067] 3 parts lubricant

[0068] 3 parts antioxidant

[0069] 7 parts of pigment.

[0070] Preferably, in this embodiment, the toughening agent is a 1:1:1:1 mixture of EVA, EPDM, polyolefin elastomer and glass fiber.

[0071] Preferably, in this embodiment, the inorganic mineral filler is a mixture of talc, barium sulfate and calcium carbonate in a ratio of 1:1:1.

[0072] Preferably, in this embodiment, the antioxidant is antioxidant 1076.

[0073] Preferably, in this embodiment, the colorant consists of ultramarine blue and titanium dioxide.

[0074] A method for manufacturing a modified PP sheet comprises the following steps:

[0075] Step 1: Weigh the corresponding PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant raw materials according to the ratio;

[0076] Step 2: Add PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant into the hopper of the extruder and mix them into a mixture;

[0077] Step 3: Plasticize and extrude the mixture through a twin-screw extruder to obtain a primary PP sheet. The extruder is extruded using a twin-screw extruder with the following zone temperatures: Zone 1 150°C, Zone 2 160°C, Zone 3 175°C, Zone 4 180°C, Zone 5 180°C, Zone 6 180°C, Zone 7 180°C, Zone 8 180°C, Zone 9 190°C, and the die head 180°C.

[0078] Step 4: The finished PP sheet is passed through a three-roller forming machine for surface treatment and cooled to shape;

[0079] Step 5: The surface of the PP sheet after the shaping treatment in step 4 is pressed with convex and concave anti-slip patterns;

[0080] Step 6: Place the middle layer 3 between the PP sheet treated with the convex and concave anti-slip patterns and the untreated PP sheet pre-finished product, hot-press and co-extrude them to obtain the modified PP sheet product, and then roll and package it. Example

[0081] like Figure 2-9 As shown, the present invention also discloses a manufacturing device for a modified PP sheet, comprising a metering feeding device 10, a mixing device 11, a twin-screw extruder 12, a cooling and shaping device 13, an embossing roller 14, a pressure roller 15, a hot pressing molding device 16 and a winding device 17. The metering feeding device 10 is provided with several stations, and the outlet end of each metering feeding device 10 is connected to the inlet end of the mixing device 11, and the outlet end of the mixing device 11 is connected to the inlet end of the twin-screw extruder 12. The cooling and shaping device 13 is arranged at the outlet of the twin-screw extruder 12, the embossing roller 14 and the pressure roller 15 cooperate to press the PP sheet surface layer 1, the hot pressing molding device 16 is used to hot-press and co-extrude the PP sheet surface layer 1, the PP sheet base layer 2 and the intermediate layer 3 to obtain a modified PP sheet product, and the winding device 17 is used to roll and package the hot-pressed PP sheet product.

[0082] In this embodiment, the mixing device 11 includes an outer shell 1101, and a plurality of inclined plates 1102 are alternately arranged on the surfaces of both sides of the inner cavity of the outer shell 1101. An elastic pad 1003 is installed on the upper surface of the inclined plate 1102, and a first spring 1104 is evenly installed between the elastic pad 1003 and the inclined plate 1102.

[0083] The raw materials are stored in the metering feeding device 10 and are metered by weightless metering before being put into the mixing device 11. Inclined plates 1102 are staggered in sequence in the inner cavity of the mixing device 11 to increase the movement distance of the raw materials, so as to ensure that the raw materials can be mixed evenly. Moreover, through the elastic action of the elastic pad 1003 and the elastic force of the first spring 1104, the raw materials can bounce up in a disorderly manner after falling on the elastic pad 1003, so as to ensure that the raw materials are mixed more evenly.

[0084] In this embodiment, the cooling and shaping device 13 includes a base 1301, on which a cooling box 1302 and a motor support 1310 are fixedly installed. A motor 1311 is fixedly installed on the motor support 1310. A rotating shaft 1304 is fixedly installed on the output shaft of the motor 1311. Two first bevel gears 1305 are fixedly installed on the rotating shaft 1304. The first bevel gear 1305 is meshed with a second bevel gear 1306. One end of a rotating column 1307 is fixedly connected to the second bevel gear 1306. A fan 1309 is fixedly installed on the other end of the rotating column 1307. Two fan frames 1308 are symmetrically fixedly installed on the top of the cooling box 1302. The two fan frames 1308 and the corresponding fans 1309 Rotationally connected, one end of a belt shaft 1314 is rotatably mounted on one side of the motor support 1310, and the other end of the belt shaft 1314 is rotatably connected to the cooling box 1302. A first pulley 1312 is fixedly mounted on the belt shaft 1314 and the rotating shaft 1304, and the two first pulleys 1312 are rotatably connected to the same first belt 1313. A drive shaft 1318 is rotatably mounted on one side of the cooling box 1302, and a second pulley 1317 is fixedly mounted on the drive shaft 1318 and the belt shaft 1314, and the two second pulleys 1317 are rotatably connected to the same second belt 1316. An adjustment block 1319 is slidably mounted on the inner wall of one side of the cooling box 1302, and a condenser 1320 is fixedly mounted on the adjustment block 1319;

[0085] The adjustment block 1319 is provided with a movable groove 1327, in which an adjustment plate 1328 is slidably mounted. The adjustment plate 1328 is provided with an elliptical groove 1322, on which a plurality of teeth 1323 are fixedly mounted. One end of the drive shaft 1318 extends into the elliptical groove 1322 and is slidably connected thereto. A gear 1324 is fixedly mounted on the drive shaft 1318, and the gear 1324 meshes with the teeth 1323.

[0086] Three shaping rollers 1321 are fixedly installed in the cooling box 1302, and a guide roller 1315 is fixedly installed on the base 1301. The guide roller 1315 and the three shaping rollers 1321 are wrapped with a PP sheet surface layer 1.

[0087] The PP sheet surface layer 1 first passes through the guiding effect of the guide roller 1315 to enter the cooling box 1302, and is wound around the surface of the three shaping rollers 1321 for shaping. At the same time, the motor 1311 and the condenser 1320 are turned on. The motor 1311 drives the rotating shaft 1304 to rotate through the output shaft. The rotating shaft 1304 drives the corresponding rotating column 1307 to rotate through the two first bevel gears 1305 and the two second bevel gears 1306. The two rotating columns 1307 drive the corresponding fan 1309 to rotate, thereby blowing cold air into the cooling box 1302 for heat dissipation. At the same time, the rotating shaft 1304 drives the belt shaft 1314 to rotate through the first belt 1313 and the two first pulleys 1312, and the belt shaft 1314 drives the drive shaft 1318 to rotate through the second belt 1316 and the two second pulleys 1317, and the drive shaft 1318 drives the gear 1324 to rotate, and the gear 1324 is engaged with the teeth 1323, so the gear 1324 drives the adjustment plate 1328 to reciprocate longitudinally, and the adjustment plate 1328 drives the adjustment block 1319 to reciprocate longitudinally, and the adjustment block 1319 drives the condenser 20 to reciprocate longitudinally, thereby improving the heat dissipation effect, making the heat dissipation more thorough, and ensuring product quality.

[0088] In this embodiment, the embossing roller 14 includes an embossing roller 141 and an embossing roller sleeve 142. The outer surface of the embossing roller 141 is evenly provided with card slots 143, and the inner surface of the embossing roller sleeve 142 is fixedly connected with a card strip 144; the embossing roller sleeve 142 is movably connected to the outer surface of the embossing roller 141 and is limited by the cooperation of the card strip 144 and the card slot 143; the outer surfaces of both ends of the embossing roller 141 are provided with threaded connection parts 145, and the two ends of the embossing roller 141 are movably connected with fixing nuts 146 through the threaded connection parts 145, and the two ends of the embossing roller sleeve 142 are limited and fixed by the fixing nuts 146;

[0089] The pressure roller 15 cooperates with the embossing roller sleeve 142 to press the PP sheet surface layer 1. A pressure roller shaft 151 is provided in the middle of the pressure roller 15. The pressure roller 15 is movably connected to the outer surface of the pressure roller shaft 151. Both ends of the pressure roller shaft 151 are connected to the upper end of the pressing frame 153 through the connecting frame 152. The lower end of the pressing frame 153 is rotatably connected to the hinge seat 155 through the bearing seat 154. The hinge seat 155 is fixedly connected to one end of the second spring 156 on the side close to the pressure roller 15, and the other end of the second spring 156 is fixedly installed above the pressing frame 153.

[0090] The embossing roller 141 and the embossing roller sleeve 142 are movably connected in coordination with each other, so that different embossing roller sleeves 142 can be replaced according to the needs of different patterns on the surface of the PP sheet surface layer 1. When installing or replacing, it is only necessary to remove the fixing nut 146 at one end of the embossing roller 141, and the old embossing roller sleeve 142 can be slid out along the slot 143. The new embossing roller sleeve 142 is installed on the surface of the embossing roller 141 through the cooperation of the card strip 144 and the slot 143, and then the fixing nut 146 is installed. It is convenient and fast, so that the embossing roller sleeve can be quickly disassembled and replaced. At the same time, when the embossing roller sleeve 142 is damaged, there is no need to replace the entire embossing roller 14, which further saves manpower. The pressing roller 15 is provided with a plurality of springs 156, 157 and 158, which are respectively used to pull the pressing frame 153 and the embossing roller 14 to rotate in the direction of the embossing roller 14. The pressing roller 15 is provided with a plurality of springs 156, 157 and 158, which are used to pull the pressing frame 153 and the embossing roller 14 to rotate in the direction of the embossing roller 14. The pressing roller 15 is provided with a plurality of springs 156, 157 and 158, which are respectively used to pull the pressing frame 153 and the embossing roller 14 to rotate in the direction of the embossing roller 14. The pressing frame 153 is provided with a plurality of springs 156, 157 and 158, which are respectively used to pull the pressing frame 153 and the embossing roller 14 to rotate in the direction of the embossing roller 14

[0091] In this embodiment, the hot pressing forming device 16 includes an upper hot pressing roller 1601, a lower hot pressing roller 1602 and a pressing roller frame 1603. Both sides of the pressing roller frame 1603 are fixedly installed with mounting pillars 1604. Two waist-shaped holes 1605 are respectively provided on the surface of the mounting pillars 1604. The upper hot pressing roller 1601 and the lower hot pressing roller 1602 are connected to the second roller shaft 1606 at both ends. The second roller shaft 1606 passes through the two waist-shaped holes 1605 and is movably connected to the waist-shaped holes 1605. The outer surface of each second roller shaft 1606 is rotatably connected to one end of the connecting rod 1607, and the other end of the connecting rod 1607 is rotatably connected to the screw nut 1608. The screw nut 1608 is movably connected to the outer surface of the screw 119 through a thread. One end of the screw 119 is transmission-connected to the screw motor 1610 through a coupling. The screw motor 1610 is fixedly installed on the side surface of the pressure roller frame 1603, and the other end of the screw 119 is movably connected to the side surface of the pressure roller frame 1603 through a bearing.

[0092] During hot pressing, after the PP sheet surface layer 1, the middle layer 3 and the PP sheet base layer 2 are combined and passed between the upper hot pressing roller 1601 and the lower hot pressing roller 1602, the screw motor 1610 drives the screw 119 to rotate, thereby driving the screw nut 1608 on the surface of the screw 119 to move left and right along the screw 119, and then according to the connecting rod principle, the two connecting rods 1607 drive the upper hot pressing roller 1601 and the lower hot pressing roller 1602 to move in relative directions, thereby realizing the hot pressing work of the PP sheet surface layer 1, the middle layer 3 and the PP sheet base layer 2, and the waist-shaped hole 1605 can limit the position where the ends of the two connecting rods 1607 are connected to the second roller shaft 1606 to ensure that the upper hot pressing roller 1601 and the lower hot pressing roller 1602 can only move up and down.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A manufacturing device for a modified PP sheet, the modified PP sheet comprising a PP sheet surface layer (1), a PP sheet base layer (2) and an intermediate layer (3), characterized in that: The intermediate layer (3) is arranged between the PP sheet surface layer (1) and the PP sheet base layer (2); the PP sheet surface layer (1), the PP sheet base layer (2) and the intermediate layer (3) are integrally formed by hot pressing; the PP sheet surface layer (1) and the PP sheet base layer (2) are both made of the same material, which is made of PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant as raw materials, and each component is mixed according to the following weight parts: PP resin 40-50 parts Polystyrene 8-10 parts Toughening agent 5-10 parts Inorganic mineral filler 10-15 parts Dispersant 1-3 parts 1-3 parts of lubricant 1-3 parts antioxidant 5-7 parts of pigment; The outer surface of the PP sheet surface layer (1) is pressed with convex and concave anti-slip patterns, and the thickness of the PP sheet base layer (2) is equal to that of the PP sheet surface layer (1); The method for manufacturing the modified PP sheet comprises the following steps: Step 1: weigh the corresponding PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant raw materials according to the ratio; Step 2: Add PP resin, polystyrene, toughening agent, inorganic mineral filler, dispersant, lubricant, antioxidant and colorant into the hopper of the extruder and mix them into a mixture; Step 3, plasticizing and extruding the mixture through a twin-screw extruder to obtain a primary PP sheet product; Step 4: The finished PP sheet is subjected to surface treatment by a three-roller shaping machine and cooled to shape; Step 5: The surface of the PP sheet after the shaping treatment in step 4 is pressed with convex and concave anti-slip textures; Step 6: placing the middle layer (3) between the PP sheet treated with the convex and concave anti-slip texture and the untreated PP sheet pre-finished product, hot pressing and co-extruding to obtain the modified PP sheet finished product, and then rolling and packaging; Twin-screw extruder is used for extrusion. The temperature of each zone of the extruder is: zone 1 150℃, zone 2 160℃, zone 3 175℃, zone 4 180℃, zone 5 180℃, zone 6 180℃, zone 7 180℃, zone 8 180℃, zone 9 190℃, and die head 180℃; A manufacturing device for a modified PP sheet, comprising a metering feeding device (10), a mixing device (11), a twin-screw extruder (12), a cooling and shaping device (13), an embossing roller (14), a pressure roller (15), a hot pressing molding device (16) and a winding device (17), wherein the metering feeding device (10) is provided with a plurality of stations, and the outlet end of each metering feeding device (10) is connected to the inlet end of the mixing device (11), and the outlet end of the mixing device (11) is connected to the inlet end of the twin-screw extruder. The PP sheet material surface layer (1) is connected to the inlet end of the twin-screw extruder (12); the cooling and shaping device (13) is arranged at the outlet of the twin-screw extruder (12); the embossing roller (14) cooperates with the pressing roller (15) to press the PP sheet material surface layer (1); the hot pressing and forming device (16) is used to hot press and co-extrude the PP sheet material surface layer (1), the PP sheet material base layer (2) and the middle layer (3) to obtain a modified PP sheet material product; and the winding device (17) is used to wind and package the hot-pressed PP sheet material product; The mixing device (11) comprises an outer shell (1101), a plurality of inclined plates (1102) are arranged alternately on the surfaces of both sides of the inner cavity of the outer shell (1101), an elastic pad (1003) is installed on the upper surface of the inclined plate (1102), and a first spring (1104) is evenly installed between the elastic pad (1003) and the inclined plate (1102); The cooling and shaping device (13) comprises a base (1301), a cooling box (1302) and a motor support (1310) are fixedly mounted on the base (1301), a motor (1311) is fixedly mounted on the motor support (1310), a rotating shaft (1304) is fixedly mounted on the output shaft of the motor (1311), two first bevel gears (1305) are fixedly mounted on the rotating shaft (1304), a second bevel gear (1306) is meshed with the first bevel gear (1305), one end of a rotating column (1307) is fixedly connected to the second bevel gear (1306), a fan (1309) is fixedly mounted on the other end of the rotating column (1307), and two fan frames (1308) are symmetrically fixedly mounted on the top of the cooling box (1302), and the two fan frames (1308) and the corresponding fans (1309) are connected to each other. Rotationally connected, one end of a belt shaft (1314) is rotationally mounted on one side of the motor support (1310), the other end of the belt shaft (1314) is rotationally connected to the cooling box (1302), a first pulley (1312) is fixedly mounted on the belt shaft (1314) and the rotating shaft (1304), the two first pulleys (1312) are transmission-connected via a first belt (1313), a driving shaft (1318) is rotationally mounted on one side of the cooling box (1302), a second pulley (1317) is fixedly mounted on the driving shaft (1318) and the belt shaft (1314), the two second pulleys (1317) are transmission-connected via a second belt (1316), an adjustment block (1319) is slidably mounted on the inner wall of one side of the cooling box (1302), and a condenser (1320) is fixedly mounted on the adjustment block (1319); The adjusting block (1319) is provided with a movable groove (1327), an adjusting plate (1328) is slidably mounted in the movable groove (1327), an elliptical slide groove (1322) is provided on the adjusting plate (1328), a plurality of teeth (1323) are fixedly mounted on the adjusting plate (1328), one end of the driving shaft (1318) extends into the elliptical slide groove (1322) and is slidably connected to the elliptical slide groove (1322), a gear (1324) is fixedly mounted on the driving shaft (1318), and the gear (1324) is meshed with the teeth (1323); Three shaping rollers (1321) are fixedly installed in the cooling box (1302), a guide roller (1315) is fixedly installed on the base (1301), and a PP sheet surface layer (1) is wound around the guide roller (1315) and the three shaping rollers (1321); The embossing roller (14) comprises an embossing roller (141) and an embossing roller sleeve (142); the outer surface of the embossing roller (141) is evenly provided with clamping grooves (143); the inner surface of the embossing roller sleeve (142) is fixedly connected with a clamping strip (144); the embossing roller sleeve (142) is movably connected to the outer surface of the embossing roller (141), and is limited in position by the cooperation of the clamping strip (144) and the clamping groove (143); the outer surfaces of both ends of the embossing roller (141) are provided with threaded connection parts (145); the two ends of the embossing roller (141) are movably connected with fixing nuts (146) through the threaded connection parts (145), and the two ends of the embossing roller sleeve (142) are limited in position and fixed by the fixing nuts (146).

2. The manufacturing equipment of a modified PP sheet according to claim 1, characterized in that: The pressing roller (15) cooperates with the embossing roller sleeve (142) to press the PP sheet surface layer (1); a pressing roller shaft (151) is arranged in the middle of the pressing roller (15); the pressing roller (15) is movably connected to the outer surface of the pressing roller shaft (151); both ends of the pressing roller shaft (151) are connected to the upper end of the pressing frame (153) through a connecting frame (152); the lower end of the pressing frame (153) is rotatably connected to the hinge seat (155) through a bearing seat (154); one end of the second spring (156) is fixedly connected to the side of the hinge seat (155) close to the pressing roller (15); and the other end of the second spring (156) is fixedly installed above the pressing frame (153).

3. The manufacturing equipment of a modified PP sheet according to claim 1, characterized in that: The hot pressing forming device (16) comprises an upper hot pressing roller (1601), a lower hot pressing roller (1602) and a pressing roller frame (1603), both sides of the pressing roller frame (1603) are fixedly mounted with mounting pillars (1604), the surfaces of the mounting pillars (1604) are respectively provided with two waist-shaped holes (1605), the upper hot pressing roller (1601) and the lower hot pressing roller (1602) are connected to second roller shafts (1606) at both ends, the second roller shafts (1606) respectively pass through the two waist-shaped holes (1605) and are movably connected to the waist-shaped holes (1605), each of the second roller shafts (1606) passing through the two waist-shaped holes (1605) and ... The outer surfaces of the two roller shafts (1606) are both rotatably connected to one end of a connecting rod (1607), the other end of the connecting rod (1607) is rotatably connected to a screw nut (1608), the screw nut (1608) is movably connected to the outer surface of a screw rod (119) via a thread, one end of the screw rod (119) is transmission-connected to a screw motor (1610) via a coupling, the screw motor (1610) is fixedly mounted on the side surface of a pressure roller frame (1603), and the other end of the screw rod (119) is movably connected to the side surface of the pressure roller frame (1603) via a bearing.

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