Preparation method of WPC photo frame and WPC photo frame

Abstract

The invention discloses a preparation method of a WPC photo frame, which comprises the following steps: modifying raw materials, and mixing the modified raw materials; then mold shaping is conducted, and the wood-plastic composite board is obtained; cutting the wood-plastic composite board to obtain various parts, and assembling the parts to obtain the photo frame. The WPC photo frame prepared according to the preparation method comprises the photo frame body, the back plate and the glass, the photo frame body comprises four arc-shaped angle blocks, a plurality of first connecting blocks and a plurality of second connecting blocks, and the two side faces of each arc-shaped angle block are each provided with a clamping groove and a clamping protrusion; the first connecting block and the arc-shaped angle block, the first connecting block and the second connecting block, and the second connecting block and the arc-shaped angle block are mutually clamped through the clamping grooves and the clamping bulges; and each arc-shaped angle block is connected with the back plate through a connecting bolt. According to the invention, the structural strength can be improved, and the invention has the advantages of low manufacturing cost, strong impact resistance, high structural stability, high use flexibility, long service life and convenience in disassembly and assembly.

Description

Technical Field

[0001] The invention relates to a photo frame and a manufacturing method thereof, in particular to a preparation method of a WPC photo frame and the WPC photo frame. Background Art

[0002] As people's environmental awareness continues to increase, people are studying more and more environmentally friendly materials. Among them, WPC is an environmentally friendly material that is formed by mixing wood powder and waste plastics and has the appearance of wood and the corrosion resistance of plastic. It is used in many fields, including photo frames; the main raw materials of existing WPC materials are wood powder and plastic, but because wood powder is a material with very fine particles made through many processes, its price is relatively high, which leads to an increase in the entire manufacturing cost when remanufacturing WPC materials; at the same time, because the compatibility between wood powder and plastic has a certain range, there is a large gap between the subsequent wood powder and plastic, which in turn affects the entire wood-plastic composite material. It is easy to crack or break due to its low strength during the subsequent stretching process, and the overall structural strength is low. Therefore, the existing wood-plastic composite profiles have the problems of low structural strength and high manufacturing cost during the production process. Summary of the invention

[0003] The purpose of the present invention is to provide a method for preparing a WPC photo frame and a WPC photo frame. The present invention can not only improve the structural strength, but also has the advantage of low manufacturing cost.

[0004] The technical solution of the present invention is a method for preparing a WPC photo frame, comprising the following steps:

[0005] Step A, raw material modification, PVC (polyvinyl chloride) and DOP (dioctyl phthalate) are added into an oven in a ratio of 80 parts: 20 parts for drying to obtain modified plastic A; wood powder and calcium oxide are added into a drying box in a ratio of 85 parts: 15 parts for drying to obtain raw material B; raw material B and amine modifier M are mixed in a ratio of 35 parts: 65 parts, and then added into a drying box for secondary drying to obtain modified wood powder C;

[0006] Step B, material mixing, adding modified wood powder A, modified wood powder C and sorbitol in a ratio of 30 parts: 35 parts: 3 parts into a stirring device for stirring and mixing to obtain a stirred mixture D; then heating the stirred mixture D to 100° C. to 120° C., and then adding 1 part of blocked isocyanate, 4 parts of polyethylene glycol monoformaldehyde and 20 parts of ceramic powder in sequence for mixing and stirring; finally cooling the uniformly mixed raw materials to 20° C. to 40° C. to obtain an intermediate material E; at the same time, mixing the modified wood powder C and activated carbon powder in a ratio of 50 parts: 50 parts to obtain an intermediate material F;

[0007] Step C, mold shaping, alternately laying the intermediate material E and the intermediate material F on the mold in layers, and then placing the mold on the press plate for step hot pressing. After hot pressing and molding, wait for natural cooling and demoulding to obtain the wood-plastic composite board;

[0008] Step D, cutting the board, cutting the lignin composite board in step C into a backboard, arc-shaped corner blocks, a first connecting block with a hollow center, and a second connecting block with a hollow center, each side of the first connecting block has a snap-fitting protrusion; one side of the second connecting block is a horizontal plane, and the other three sides have snap-fitting grooves that match the snap-fitting protrusions, and a snap-fitting through groove is cut in the middle of the horizontal plane;

[0009] Step E, assembling the photo frame, splicing the arc-shaped corner block, the first connecting block and the second connecting block together according to the shape and size of the photo frame to be spliced ​​to form a photo frame shell, and at the same time, the glass protection plate is installed on the through groove, and finally assembled to the photo frame shell by bolts or glue to obtain the photo frame.

[0010] In the aforementioned method for preparing a WPC photo frame, the step hot pressing in step C is divided into a preheating and shaping section, a holding hot pressing section, a heating hot pressing section and a cooling hot pressing section, the temperature of the preheating and shaping section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 0.4MPa to 0.7MPa; the temperature of the holding hot pressing section is 140°C to 150°C, the time is 5min to 8min, and the pressure is 2MPa to 4MPa; the temperature of the heating hot pressing section is 155°C to 170°C, the heating time is 25min to 40min, and the pressure is 4MPa to 4.5MPa; the temperature of the cooling hot pressing section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 2MPa to 3MPa.

[0011] In the aforementioned method for preparing a WPC photo frame, pressure relief and exhaust work needs to be performed between the preheating and shaping section and the hot pressing section, and pressure relief and exhaust work also needs to be performed between the hot pressing section and the heating and hot pressing section; during the heating and hot pressing section, pressure relief and exhaust work needs to be performed every 10 minutes.

[0012] In the aforementioned method for preparing a WPC photo frame, the drying temperature of the drying work in step A is 100° C. to 140° C., and the drying time is 5 to 7 hours; the drying temperature of the secondary drying work is 100° C. to 140° C., and the drying time is 3 to 6 hours.

[0013] A WPC photo frame prepared according to the method for preparing a WPC photo frame according to the above claims comprises a photo frame body, a back plate and glass, wherein the photo frame body comprises four arc-shaped corner blocks distributed at four corners, the upper and lower ends of one side of each arc-shaped corner block are provided with a clamping groove, and the upper and lower ends of the other side of each arc-shaped corner block are provided with a clamping protrusion; a plurality of evenly distributed first connecting blocks are arranged between each two adjacent arc-shaped corner blocks, and each side of each first connecting block is provided with a clamping protrusion; second connecting blocks are arranged on both upper and lower sides of each first connecting block, and a supporting plane is arranged on the side away from the first connecting block of each second connecting block; a clamping protrusion is also arranged on one side of each supporting plane, and a clamping groove is also arranged on the other side; a clamping groove is also arranged on the side of each second connecting block close to the first connecting block, and the clamping protrusion and the clamping groove cooperate with each other; a threaded groove is arranged on the side of each arc-shaped corner block close to the back plate; a threaded channel is arranged on the four corners of the back plate, and a connecting bolt is installed in the thread of the threaded channel, and the connecting bolt is threadedly connected with the threaded groove.

[0014] In the aforementioned WPC photo frame, a clamping groove for clamping glass is provided on the end surface of the supporting plane away from the first connecting block.

[0015] In the aforementioned WPC photo frame, the second connecting block is approximately triangular in shape, and a hollow channel is provided in the middle of the second connecting block; the first connecting block is a regular quadrilateral in shape, and a hollow channel is also provided in the middle of the second connecting block; an internal thread section is provided on the inner side wall of each hollow channel.

[0016] In the aforementioned WPC photo frame, a magnet block is installed on the end of the hollow channel away from the back plate, and a connecting sleeve is sleeved on the magnet block; an outer surface of the connecting sleeve is provided with an external thread matching the internal thread of the hollow channel, and a photo placement seat is installed on the end of the connecting sleeve away from the back plate; a magnet sheet matching the magnet block is provided on the side of the photo placement seat, and a photo slot with an open top surface is provided on the photo placement seat, and an auxiliary groove is provided at the port of the photo slot.

[0017] In the aforementioned WPC photo frame, a support seat is provided in the middle of the back plate away from the side of the first connecting block, and a support leg is hingedly mounted on the support seat; and a wear-resistant sleeve is sleeved on the bottom end of the support leg.

[0018] In the aforementioned WPC photo frame, the arc-shaped corner block is mutually clamped with the second connecting block through the clamping groove and the clamping protrusion on the supporting plane; every two adjacent second connecting blocks are spliced ​​together through the clamping groove and the clamping protrusion; the clamping groove on the side of the second connecting block and the clamping protrusion on the side of the first connecting block cooperate with each other.

[0019] Compared with the prior art, the present invention improves the existing WPC photo frame preparation method and photo frame structure. By adding an appropriate amount of amine modifier M to the treated wood powder, the compatibility between the wood powder and polyvinyl chloride is improved, so that the tensile strength, hardness, impact strength, etc. of the final wood-plastic composite material are improved to a certain extent. At the same time, because the compatibility between the wood powder and polyvinyl chloride is improved, the gap between the two will be correspondingly reduced, so that the water absorption of the obtained wood-plastic composite material is reduced, it is not easy to be corroded, and the service life is extended; by adding ceramic powder to the raw material, the surface of the ceramic powder is relatively uniform, and the surface functional groups are relatively uniform, and the price of the ceramic powder is relatively uniform. The ceramic powder is cheap, so it can replace wood powder, which can not only reduce the content of wood powder and reduce manufacturing costs, but also the hardness of ceramic powder is higher than that of wood powder, so the hardness of the final wood-plastic composite material can be increased; by adding blocked isocyanate and polyethylene glycol monomethyl ether, the interface compatibility between wood powder, ceramic powder and plastic can be improved, and the interface bonding ability between the three can be increased, thereby increasing the impact resistance of the final wood-plastic composite material, and then the impact resistance of the entire photo frame can be increased; by setting the entire photo frame shell to be spliced ​​by a plurality of arc-shaped corner blocks, a first connecting block and a second connecting block, the user can adjust the size of the photo frame according to his own needs, thereby improving the flexibility of use. In addition, the present invention also performs hot pressing and forming of the wood-plastic profile by adopting a staged hot pressing method, and utilizes the differences in temperature, pressure and time in different stages to make the bonding between the various materials and between the various layers of materials tighter, thereby improving the stability of the structure; by providing a threaded groove on the arc-shaped corner block, cooperating with the threaded channel and connecting bolts on the back plate, it is convenient to install or remove the back plate, and it is convenient to assemble and replace the internal photos; by providing a card-connection groove on the supporting plane, the position of the glass is positioned and fixed by using the card-connection groove, thereby ensuring the stability of the structure; by setting the second connecting block into a triangular shape and the first connecting block into a regular quadrilateral shape, during assembly, the first connecting block and the second connecting block can be easily connected. A three-sided support structure is formed, so that the received gravity is evenly distributed, the load-bearing capacity is improved, and the fracture of the splicing position due to excessive load-bearing is avoided, thereby extending the service life; by providing a hollow channel in the middle of the first connecting block and the second connecting block, the weight of the first connecting block and the second connecting block can be reduced by using the leak hole channel, thereby reducing the mass of the entire photo frame; and an internal thread section is provided in the hollow channel, which cooperates with the external photo placement seat, so that the user can freely decorate the photo frame or display multiple photos at one time, thereby improving the flexibility of use; by sleeve-connecting a wear-resistant sleeve on the end of the supporting foot piece, the wear-resistant sleeve can be used to increase the friction and wear resistance between the supporting foot piece and the placement plane, thereby ensuring the stability of use and extending the service life.Therefore, the present invention can not only improve the structural strength, but also has the advantages of low manufacturing cost, strong resistance to impact, high structural stability, high flexibility in use, long service life and convenient disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 is a rear view of the present invention;

[0022] Figure 3 is a top view of the present invention;

[0023] Figure 4 is a schematic diagram of the connection structure between the first connection block and the photo placement seat;

[0024] Figure 5 yes Figure 1 A partial enlarged view of point A in the middle.

[0025] The markings in the accompanying drawings are: 1-back panel, 2-glass, 3-arc corner block, 4-clamping groove, 5-first connecting block, 6-clamping protrusion, 7-second connecting block, 8-support plane, 10-connecting bolt, 11-clamping groove, 12-hollow channel, 13-magnet block, 14-photo placement seat, 15-magnet sheet, 16-photo slot, 17-auxiliary groove, 18-support seat, 19-support foot, 20-wear-resistant sleeve. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0027] Embodiment 1. A method for preparing a WPC photo frame, comprising the following steps:

[0028] Step A, raw material modification, PVC (polyvinyl chloride) and DOP (dioctyl phthalate) are added into an oven in a ratio of 80 parts: 20 parts for drying to obtain modified plastic A; wood powder and calcium oxide are added into a drying box in a ratio of 85 parts: 15 parts for drying to obtain raw material B; raw material B and amine modifier M are mixed in a ratio of 35 parts: 65 parts, and then added into a drying box for secondary drying to obtain modified wood powder C;

[0029] Step B, material mixing, adding modified wood powder A, modified wood powder C and sorbitol in a ratio of 30 parts: 35 parts: 3 parts into a stirring device for stirring and mixing to obtain a stirred mixture D; then heating the stirred mixture D to 100° C. to 120° C., and then adding 1 part of blocked isocyanate, 4 parts of polyethylene glycol monoformaldehyde and 20 parts of ceramic powder in sequence for mixing and stirring; finally cooling the uniformly mixed raw materials to 20° C. to 40° C. to obtain an intermediate material E; at the same time, mixing the modified wood powder C and activated carbon powder in a ratio of 50 parts: 50 parts to obtain an intermediate material F;

[0030] Step C, mold shaping, alternately laying the intermediate material E and the intermediate material F on the mold in layers, and then placing the mold on the press plate for step hot pressing. After hot pressing and molding, wait for natural cooling and demoulding to obtain the wood-plastic composite board;

[0031] Step D, cutting the board, cutting the lignin composite board in step C into a backboard, arc-shaped corner blocks, a first connecting block with a hollow center, and a second connecting block with a hollow center, each side of the first connecting block has a snap-fitting protrusion; one side of the second connecting block is a horizontal plane, and the other three sides have snap-fitting grooves that match the snap-fitting protrusions, and a snap-fitting through groove is cut in the middle of the horizontal plane;

[0032] Step E, assembling the photo frame, splicing the arc-shaped corner block, the first connecting block and the second connecting block together according to the shape and size of the photo frame to be spliced ​​to form a photo frame shell, and at the same time, the glass protection plate is installed on the through groove, and finally assembled to the photo frame shell by bolts or glue to obtain the photo frame.

[0033] The step hot pressing in step C is divided into a preheating and shaping section, a holding hot pressing section, a heating hot pressing section and a cooling hot pressing section. The temperature of the preheating and shaping section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 0.4MPa to 0.7MPa; the temperature of the holding hot pressing section is 140°C to 150°C, the time is 5min to 8min, and the pressure is 2MPa to 4MPa; the temperature of the heating hot pressing section is 155°C to 170°C, the heating time is 25min to 40min, and the pressure is 4MPa to 4.5MPa; the temperature of the cooling hot pressing section is 155°C to 170°C, the heating time is 25min to 40min, and the pressure is 4MPa to 4.5MPa; the temperature of the cooling hot pressing section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 0.4MPa to 0.7MPa. The temperature of the preheating and shaping section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 2MPa to 3MPa; pressure relief and exhaust work is required between the preheating and shaping section and the hot pressing section, and pressure relief and exhaust work is also required between the hot pressing section and the heating and hot pressing section; pressure relief and exhaust work is required every 10 minutes during the heating and hot pressing section; the drying temperature of the drying work in step A is 100°C to 140°C, and the drying time is 5 to 7 hours; the drying temperature of the secondary drying work is 100°C to 140°C, and the drying time is 3 to 6 hours.

[0034] The WPC photo frame prepared by the method for preparing a WPC photo frame according to the preceding claim is composed as follows Figures 1 to 5 As shown, the photo frame comprises a photo frame body, a back plate 1 and a glass 2, wherein the photo frame body comprises four arc-shaped corner blocks 3 distributed at four corners, each arc-shaped corner block 3 has a clamping groove 4 at the upper and lower ends of one side, and each arc-shaped corner block 3 has a clamping protrusion 6 at the upper and lower ends of the other side; a plurality of evenly distributed first connecting blocks 5 are arranged between each adjacent two arc-shaped corner blocks 3, and each side of each first connecting block 5 has a clamping protrusion 6; each first connecting block 5 has a second connecting block 7 arranged on both sides, and each second connecting block 7 has a protrusion 6 away from the upper and lower sides. The side surfaces of the first connecting blocks 5 are provided with supporting planes 8; a clamping protrusion 6 is also provided on one side surface of each supporting plane, and a clamping groove 4 is also provided on the other side surface; a clamping groove 4 is also provided on the side surface of each second connecting block 7 close to the first connecting block 5, and the clamping protrusion 6 and the clamping groove 4 cooperate with each other; a threaded groove is provided on the side surface of each of the arc-shaped corner blocks 3 close to the back plate 1; threaded channels are provided on the four corners of the back plate 1, and connecting bolts 10 are installed in the inner threads of the threaded channels, and the connecting bolts 10 are threadedly connected to the threaded grooves.

[0035] A clamping groove 11 for clamping the glass 2 is provided on the end surface of the support plane 8 away from the first connecting block 5; the second connecting block 7 is approximately triangular in shape, and a hollow channel 12 is provided in the middle of the second connecting block 7; the first connecting block 5 is in the shape of a regular quadrilateral, and a hollow channel 12 is also provided in the middle of the second connecting block 7; an internal thread section is provided on the inner side wall of each hollow channel 12; a magnet block 13 is installed at the end of the hollow channel 12 away from the back plate 1, and a connecting sleeve is sleeved on the magnet block 13; an external thread matching the internal thread of the hollow channel 12 is provided on the outer surface of the connecting sleeve, and a photo placement seat 14 is installed on the end of the connecting sleeve away from the back plate 1; a side of the photo placement seat 14 is provided with a A magnet sheet 15 cooperates with the magnet block 13, and a photo placement seat 14 is provided with a photo slot 16 with an open top surface, and an auxiliary groove 17 is provided at the end of the photo slot 16; a support seat 18 is provided in the middle of the back plate 1 away from the side of the first connecting block 5, and a support leg 19 is hingedly installed on the support seat 18; a wear-resistant sleeve 20 is sleeved on the bottom end of the support leg 19; the arc-shaped corner block 3 is mutually clamped with the second connecting block 7 through the clamping groove 4 and the clamping protrusion 6 on the supporting plane 8; every two adjacent second connecting blocks 7 are spliced ​​together through the clamping groove 4 and the clamping protrusion 6; the clamping groove 4 on the side of the second connecting block 7 and the clamping protrusion 6 on the side of the first connecting block 5 cooperate with each other.

[0036] Embodiment 2. A method for preparing a WPC photo frame, comprising the following steps:

[0037] Step A, raw material modification, PVC (polyvinyl chloride) and DOP (dioctyl phthalate) are added into an oven in a ratio of 80 parts: 20 parts for drying to obtain modified plastic A; wood powder and calcium oxide are added into a drying box in a ratio of 85 parts: 15 parts for drying to obtain raw material B; raw material B and amine modifier M are mixed in a ratio of 35 parts: 65 parts, and then added into a drying box for secondary drying to obtain modified wood powder C;

[0038] Step B, material mixing, adding modified wood powder A, modified wood powder C and sorbitol in a ratio of 30 parts: 35 parts: 3 parts into a stirring device for stirring and mixing to obtain a stirred mixture D; then heating the stirred mixture D to 100° C. to 120° C., and then adding 1 part of blocked isocyanate, 4 parts of polyethylene glycol monoformaldehyde and 20 parts of ceramic powder in sequence for mixing and stirring; finally cooling the uniformly mixed raw materials to 20° C. to 40° C. to obtain an intermediate material E; at the same time, mixing the modified wood powder C and activated carbon powder in a ratio of 50 parts: 50 parts to obtain an intermediate material F;

[0039] Step C, mold shaping, alternately laying the intermediate material E and the intermediate material F on the mold in layers, and then placing the mold on the press plate for step hot pressing. After hot pressing and molding, wait for natural cooling and demoulding to obtain the wood-plastic composite board;

[0040] Step D, cutting the board, cutting the lignin composite board in step C into a backboard, arc-shaped corner blocks, a first connecting block with a hollow center, and a second connecting block with a hollow center, each side of the first connecting block has a snap-fitting protrusion; one side of the second connecting block is a horizontal plane, and the other three sides have snap-fitting grooves that match the snap-fitting protrusions, and a snap-fitting through groove is cut in the middle of the horizontal plane;

[0041] Step E, assembling the photo frame, splicing the arc-shaped corner block, the first connecting block and the second connecting block together according to the shape and size of the photo frame to be spliced ​​to form a photo frame shell, and at the same time, the glass protection plate is installed on the through groove, and finally assembled to the photo frame shell by bolts or glue to obtain the photo frame.

[0042] The step hot pressing in step C is divided into a preheating and shaping section, a holding hot pressing section, a heating hot pressing section and a cooling hot pressing section. The temperature of the preheating and shaping section is 110°C, the heating time is 40 minutes, and the pressure is 0.4MPa; the temperature of the holding hot pressing section is 140°C, the time is 8 minutes, and the pressure is 2MPa; the temperature of the heating hot pressing section is 155°C, the heating time is 40 minutes, and the pressure is 4MPa; the temperature of the cooling hot pressing section is 110°C, the heating time is 40 minutes, and the pressure is 2MPa.

[0043] Pressure relief and exhaust work is required between the preheating and shaping section and the hot pressing section, and pressure relief and exhaust work is also required between the hot pressing section and the heating and hot pressing section; pressure relief and exhaust work is required every 10 minutes during the heating and hot pressing section; the drying temperature of the drying work in step A is 100°C, and the drying time is 7 hours; the drying temperature of the secondary drying work is 140°C, and the drying time is 3 hours.

[0044] The WPC photo frame prepared by the method for preparing a WPC photo frame according to the preceding claim is composed as follows Figures 1 to 5 As shown, the photo frame comprises a photo frame body, a back plate 1 and a glass 2, wherein the photo frame body comprises four arc-shaped corner blocks 3 distributed at four corners, each arc-shaped corner block 3 has a clamping groove 4 at the upper and lower ends of one side, and each arc-shaped corner block 3 has a clamping protrusion 6 at the upper and lower ends of the other side; a plurality of evenly distributed first connecting blocks 5 are arranged between each adjacent two arc-shaped corner blocks 3, and each side of each first connecting block 5 has a clamping protrusion 6; each first connecting block 5 has a second connecting block 7 arranged on both sides, and each second connecting block 7 has a protrusion 6 away from the upper and lower sides. The side surfaces of the first connecting blocks 5 are provided with supporting planes 8; a clamping protrusion 6 is also provided on one side surface of each supporting plane, and a clamping groove 4 is also provided on the other side surface; a clamping groove 4 is also provided on the side surface of each second connecting block 7 close to the first connecting block 5, and the clamping protrusion 6 and the clamping groove 4 cooperate with each other; a threaded groove is provided on the side surface of each of the arc-shaped corner blocks 3 close to the back plate 1; threaded channels are provided on the four corners of the back plate 1, and connecting bolts 10 are installed in the inner threads of the threaded channels, and the connecting bolts 10 are threadedly connected to the threaded grooves.

[0045] A clamping groove 11 for clamping the glass 2 is provided on the end surface of the support plane 8 away from the first connecting block 5; the second connecting block 7 is approximately triangular in shape, and a hollow channel 12 is provided in the middle of the second connecting block 7; the first connecting block 5 is in the shape of a regular quadrilateral, and a hollow channel 12 is also provided in the middle of the second connecting block 7; an internal thread section is provided on the inner side wall of each hollow channel 12; a magnet block 13 is installed at the end of the hollow channel 12 away from the back plate 1, and a connecting sleeve is sleeved on the magnet block 13; an external thread matching the internal thread of the hollow channel 12 is provided on the outer surface of the connecting sleeve, and a photo placement seat 14 is installed on the end of the connecting sleeve away from the back plate 1; a side of the photo placement seat 14 is provided with a A magnet sheet 15 cooperates with the magnet block 13, and a photo placement seat 14 is provided with a photo slot 16 with an open top surface, and an auxiliary groove 17 is provided at the end of the photo slot 16; a support seat 18 is provided in the middle of the back plate 1 away from the side of the first connecting block 5, and a support leg 19 is hingedly installed on the support seat 18; a wear-resistant sleeve 20 is sleeved on the bottom end of the support leg 19; the arc-shaped corner block 3 is mutually clamped with the second connecting block 7 through the clamping groove 4 and the clamping protrusion 6 on the supporting plane 8; every two adjacent second connecting blocks 7 are spliced ​​together through the clamping groove 4 and the clamping protrusion 6; the clamping groove 4 on the side of the second connecting block 7 and the clamping protrusion 6 on the side of the first connecting block 5 cooperate with each other.

[0046] Embodiment 3. A method for preparing a WPC photo frame, comprising the following steps:

[0047] Step A, raw material modification, PVC (polyvinyl chloride) and DOP (dioctyl phthalate) are added into an oven in a ratio of 80 parts: 20 parts for drying to obtain modified plastic A; wood powder and calcium oxide are added into a drying box in a ratio of 85 parts: 15 parts for drying to obtain raw material B; raw material B and amine modifier M are mixed in a ratio of 35 parts: 65 parts, and then added into a drying box for secondary drying to obtain modified wood powder C;

[0048] Step B, material mixing, adding modified wood powder A, modified wood powder C and sorbitol in a ratio of 30 parts: 35 parts: 3 parts into a stirring device for stirring and mixing to obtain a stirred mixture D; then heating the stirred mixture D to 100° C. to 120° C., and then adding 1 part of blocked isocyanate, 4 parts of polyethylene glycol monoformaldehyde and 20 parts of ceramic powder in sequence for mixing and stirring; finally cooling the uniformly mixed raw materials to 20° C. to 40° C. to obtain an intermediate material E; at the same time, mixing the modified wood powder C and activated carbon powder in a ratio of 50 parts: 50 parts to obtain an intermediate material F;

[0049] Step C, mold shaping, alternately laying the intermediate material E and the intermediate material F on the mold in layers, and then placing the mold on the press plate for step hot pressing. After hot pressing and molding, wait for natural cooling and demoulding to obtain the wood-plastic composite board;

[0050] Step D, cutting the board, cutting the lignin composite board in step C into a backboard, arc-shaped corner blocks, a first connecting block with a hollow center, and a second connecting block with a hollow center, each side of the first connecting block has a snap-fitting protrusion; one side of the second connecting block is a horizontal plane, and the other three sides have snap-fitting grooves that match the snap-fitting protrusions, and a snap-fitting through groove is cut in the middle of the horizontal plane;

[0051] Step E, assembling the photo frame, splicing the arc-shaped corner block, the first connecting block and the second connecting block together according to the shape and size of the photo frame to be spliced ​​to form a photo frame shell, and at the same time, the glass protection plate is installed on the through groove, and finally assembled to the photo frame shell by bolts or glue to obtain the photo frame.

[0052] The step hot pressing in the step C is divided into a preheating and shaping section, a holding hot pressing section, a heating hot pressing section and a cooling hot pressing section. The temperature of the preheating and shaping section is 140°C, the heating time is 20 minutes, and the pressure is 0.7MPa; the temperature of the holding hot pressing section is 150°C, the time is 5 minutes, and the pressure is 4MPa; the temperature of the heating hot pressing section is 170°C, the heating time is 25 minutes, and the pressure is 4.5MPa; the temperature of the cooling hot pressing section is 140°C, the heating time is 20 minutes, and the pressure is 3MPa; pressure relief and exhaust work is required between the preheating and shaping section and the holding hot pressing section, and pressure relief and exhaust work is also required between the holding hot pressing section and the heating hot pressing section; pressure relief and exhaust work is required every 10 minutes during the heating hot pressing section; the drying temperature of the drying work in the step A is 140°C, and the drying time is 5 hours; the drying temperature of the secondary drying work is 140°C, and the drying time is 3 hours.

[0053] The WPC photo frame prepared by the method for preparing a WPC photo frame according to any one of claims 1 to 4 is constituted as follows Figures 1 to 5As shown, the photo frame comprises a photo frame body, a back plate 1 and a glass 2, wherein the photo frame body comprises four arc-shaped corner blocks 3 distributed at four corners, each arc-shaped corner block 3 has a clamping groove 4 at the upper and lower ends of one side, and each arc-shaped corner block 3 has a clamping protrusion 6 at the upper and lower ends of the other side; a plurality of evenly distributed first connecting blocks 5 are arranged between each adjacent two arc-shaped corner blocks 3, and each side of each first connecting block 5 has a clamping protrusion 6; each first connecting block 5 has a second connecting block 7 arranged on both sides, and each second connecting block 7 has a protrusion 6 away from the upper and lower sides. The side surfaces of the first connecting blocks 5 are provided with supporting planes 8; a clamping protrusion 6 is also provided on one side surface of each supporting plane, and a clamping groove 4 is also provided on the other side surface; a clamping groove 4 is also provided on the side surface of each second connecting block 7 close to the first connecting block 5, and the clamping protrusion 6 and the clamping groove 4 cooperate with each other; a threaded groove is provided on the side surface of each of the arc-shaped corner blocks 3 close to the back plate 1; threaded channels are provided on the four corners of the back plate 1, and connecting bolts 10 are installed in the inner threads of the threaded channels, and the connecting bolts 10 are threadedly connected to the threaded grooves.

[0054] A clamping groove 11 for clamping the glass 2 is provided on the end surface of the support plane 8 away from the first connecting block 5; the second connecting block 7 is approximately triangular in shape, and a hollow channel 12 is provided in the middle of the second connecting block 7; the first connecting block 5 is in the shape of a regular quadrilateral, and a hollow channel 12 is also provided in the middle of the second connecting block 7; an internal thread section is provided on the inner side wall of each hollow channel 12; a magnet block 13 is installed at the end of the hollow channel 12 away from the back plate 1, and a connecting sleeve is sleeved on the magnet block 13; an external thread matching the internal thread of the hollow channel 12 is provided on the outer surface of the connecting sleeve, and a photo placement seat 14 is installed on the end of the connecting sleeve away from the back plate 1; a side of the photo placement seat 14 is provided with a A magnet sheet 15 cooperates with the magnet block 13, and a photo placement seat 14 is provided with a photo slot 16 with an open top surface, and an auxiliary groove 17 is provided at the end of the photo slot 16; a support seat 18 is provided in the middle of the back plate 1 away from the side of the first connecting block 5, and a support leg 19 is hingedly installed on the support seat 18; a wear-resistant sleeve 20 is sleeved on the bottom end of the support leg 19; the arc-shaped corner block 3 is mutually clamped with the second connecting block 7 through the clamping groove 4 and the clamping protrusion 6 on the supporting plane 8; every two adjacent second connecting blocks 7 are spliced ​​together through the clamping groove 4 and the clamping protrusion 6; the clamping groove 4 on the side of the second connecting block 7 and the clamping protrusion 6 on the side of the first connecting block 5 cooperate with each other.

Claims

1. A method for preparing a WPC photo frame, characterized in that: The following steps are included: Step A, raw material modification, adding PVC (polyvinyl chloride) and DOP (dioctyl phthalate) in a ratio of 80 parts:20 parts into an oven for drying to obtain modified plastic A; Wood powder and calcium oxide are added into a drying oven in a ratio of 85 parts:15 parts for drying to obtain raw material B; raw material B is then mixed with amine modifier M in a ratio of 35 parts:65 parts, and then added into a drying oven for secondary drying to obtain modified wood powder C; Step B, material mixing, adding modified wood powder A, modified wood powder C and sorbitol in a ratio of 30 parts: 35 parts: 3 parts into a stirring device for stirring and mixing to obtain a stirred mixture D; then heating the stirred mixture D to 100° C. to 120° C., and then adding 1 part of blocked isocyanate, 4 parts of polyethylene glycol monoformaldehyde and 20 parts of ceramic powder in sequence for mixing and stirring; finally cooling the uniformly mixed raw materials to 20° C. to 40° C. to obtain an intermediate material E; at the same time, mixing the modified wood powder C and activated carbon powder in a ratio of 50 parts: 50 parts to obtain an intermediate material F; Step C, mold shaping, alternately laying the intermediate material E and the intermediate material F on the mold in layers, and then placing the mold on the press plate for step hot pressing. After hot pressing and molding, wait for natural cooling and demoulding to obtain the wood-plastic composite board; Step D, cutting the board, cutting the lignin composite board in step C into a backboard, arc-shaped corner blocks, a first connecting block with a hollow center, and a second connecting block with a hollow center, each side of the first connecting block has a snap-fitting protrusion; one side of the second connecting block is a horizontal plane, and the other three sides have snap-fitting grooves that match the snap-fitting protrusions, and a snap-fitting through groove is cut in the middle of the horizontal plane; Step E, assembling the photo frame, splicing the arc-shaped corner block, the first connecting block and the second connecting block together according to the shape and size of the photo frame to be spliced ​​to form a photo frame shell, and at the same time, the glass protection plate is installed on the through groove, and finally assembled to the photo frame shell by bolts or glue to obtain the photo frame.

2. The method for preparing a WPC photo frame according to claim 1, characterized in that: The step hot pressing in step C is divided into a preheating and shaping section, a holding hot pressing section, a heating hot pressing section and a cooling hot pressing section. The temperature of the preheating and shaping section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 0.4MPa to 0.7MPa; the temperature of the holding hot pressing section is 140°C to 150°C, the time is 5min to 8min, and the pressure is 2MPa to 4MPa; the temperature of the heating hot pressing section is 155°C to 170°C, the heating time is 25min to 40min, and the pressure is 4MPa to 4.5MPa; the temperature of the cooling hot pressing section is 110°C to 140°C, the heating time is 20min to 40min, and the pressure is 2MPa to 3MPa.

3. The method for preparing a WPC photo frame according to claim 2, characterized in that: Pressure relief and exhaust work needs to be performed between the preheating and shaping section and the hot pressing section, and pressure relief and exhaust work also needs to be performed between the hot pressing section and the heating and hot pressing section; during the heating and hot pressing section, pressure relief and exhaust work needs to be performed every 10 minutes.

4. The method for preparing a WPC photo frame according to claim 1, characterized in that: The drying temperature of the drying work in step A is 100° C. to 140° C., and the drying time is 5 to 7 hours; the drying temperature of the secondary drying work is 100° C. to 140° C., and the drying time is 3 to 6 hours.

5. A WPC photo frame prepared by the method for preparing a WPC photo frame according to any one of claims 1 to 4, comprising a photo frame body, a back plate (1) and glass (2), characterized in that: The photo frame comprises four arc-shaped corner blocks (3) distributed at four corners, each arc-shaped corner block (3) having a clamping groove (4) at its upper and lower ends on one side, and each arc-shaped corner block (3) having a clamping protrusion (6) at its upper and lower ends on the other side; a plurality of evenly distributed first connecting blocks (5) are arranged between each two adjacent arc-shaped corner blocks (3), and each side of each first connecting block (5) has a clamping protrusion (6); each first connecting block (5) has a second connecting block (7) at its upper and lower sides, and each second connecting block (7) has a side away from the first connecting block (5) A support plane (8) is provided; a clamping protrusion (6) is provided on one side of each support plane (), and a clamping groove (4) is provided on the other side; a clamping groove (4) is provided on the side of each second connection block (7) close to the first connection block (5), and the clamping protrusion (6) and the clamping groove (4) cooperate with each other; a threaded groove is provided on the side of each arc-shaped corner block (3) close to the back plate (1); threaded channels are provided on the four corners of the back plate (1), and connecting bolts (10) are installed in the threads of the threaded channels, and the connecting bolts (10) are threadedly connected to the threaded grooves.

6. A WPC photo frame according to claim 5, characterized in that: A clamping groove (11) for clamping the glass (2) is provided on the end surface of the support plane (8) away from the first connecting block (5).

7. A WPC photo frame according to claim 5, characterized in that: The second connection block (7) is approximately triangular in shape, and a hollow channel (12) is provided in the middle of the second connection block (7); the first connection block (5) is a regular quadrilateral in shape, and a hollow channel (12) is also provided in the middle of the second connection block (7); and an internal thread section is provided on the inner side wall of each hollow channel (12).

8. A WPC photo frame according to claim 7, characterized in that: A magnet block (13) is mounted on the end of the hollow channel (12) away from the back plate (1), and a connecting sleeve is sleeved on the magnet block (13); an outer surface of the connecting sleeve is provided with an outer thread matched with an inner thread of the hollow channel (12), and a photo placement seat (14) is mounted on the end of the connecting sleeve away from the back plate (1); a magnet sheet (15) matched with the magnet block (13) is arranged on the side surface of the photo placement seat (14), and a photo slot (16) with an open top surface is arranged on the photo placement seat (14), and an auxiliary groove (17) is arranged at the end of the photo slot (16).

9. A WPC photo frame according to claim 5, characterized in that: A support seat (18) is provided in the middle of the back plate (1) away from the side of the first connecting block (5), and a support foot piece (19) is hingedly mounted on the support seat (18); a wear-resistant sleeve (20) is sleeved on the bottom end of the support foot piece (19).

10. A WPC photo frame according to claim 5, characterized in that: The arc-shaped corner block (3) is mutually clamped with the second connection block (7) via the clamping groove (4) and the clamping protrusion (6) on the supporting plane (8); each two adjacent second connection blocks (7) are spliced ​​together via the clamping groove (4) and the clamping protrusion (6); the clamping groove (4) on the side of the second connection block (7) and the clamping protrusion (6) on the side of the first connection block (5) cooperate with each other.

Images