CN111331851A - Ultrasonic welding method for wood-plastic composite material - Google Patents
Ultrasonic welding method for wood-plastic composite material Download PDFInfo
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- CN111331851A CN111331851A CN202010171797.7A CN202010171797A CN111331851A CN 111331851 A CN111331851 A CN 111331851A CN 202010171797 A CN202010171797 A CN 202010171797A CN 111331851 A CN111331851 A CN 111331851A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
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- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to an ultrasonic welding method of a wood-plastic composite material, which comprises the following steps: pressing a plate, hot pressing, fixing an energy guide strip, ultrasonic welding and surface treatment; the ultrasonic hot-pressing method can be used for quickly carrying out hot pressing and welding, the upper surface and the lower surface of the wood-plastic composite board cannot be damaged, the upper surface and the lower surface of the wood-plastic composite board after welding are smooth, glue overflowing is avoided, meanwhile, the efficiency of wood-plastic composite board manufacturing is improved, the manufacturing time is shortened, and the cost is saved.
Description
Technical Field
The invention relates to an ultrasonic welding method for a wood-plastic composite material.
Background
A wood-plastic composite material is a novel composite material which is prepared by compounding plant fibers and a high molecular polymer. The novel material integrates the dual advantages of wood fiber materials and polymer materials, has the characteristics of good mechanical property, high surface hardness, excellent thermal flexibility, water resistance and wear resistance, and exerts the processability of wood and the diversity and flexibility of plastic processing methods. Common plastic raw materials in the wood-plastic composite material comprise PE, PP, PVC and the like.
However, when the wood-plastic composite material is manufactured at present, the pressing plate and the plate are realized by heating, but the surface layer is easily damaged in the heating process, and when the wood-plastic composite material is hot-pressed, the glue after heating cannot be well controlled due to the adoption of a conventional heating method, edge glue overflow is easily caused, and the condition that the upper surface layer and the lower surface layer of the manufactured wood-plastic composite material are not horizontal occurs.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the ultrasonic welding method for the wood-plastic composite material, which is used for carrying out hot pressing and welding on the wood-plastic composite material by an ultrasonic heating method when the wood-plastic composite material is manufactured, so that glue overflow is avoided, and the wood-plastic composite material is convenient to butt downwards in the manufacturing process.
In order to achieve the purpose, the invention adopts the following technical scheme that the ultrasonic welding method of the wood-plastic composite material comprises the following steps:
the method comprises the following steps: placing the mixed composite material between the upper surface layer and the lower surface layer, and pressing the formed wood-plastic composite board formed by the upper surface layer, the composite material and the lower surface layer by a plate pressing machine;
step two: putting the wood-plastic composite board subjected to the plate pressing into an ultrasonic hot-press welding device for ultrasonic hot-press welding, wherein the pressure is 230N-280N when the hot-press welding is carried out, the hot-press stability is 60-80 ℃, and the hot-press time is 30-60 s;
step three: butting the wood-plastic composite boards subjected to ultrasonic hot-pressing welding, placing energy guide strips at the butted positions, and mutually fixing and pressing the energy guide strips;
step four: heating the energy guide strips by an ultrasonic welding machine to melt the energy guide strips and the end parts of the butted wood-plastic composite plates and connecting the butted wood-plastic composite plates;
step five: and carrying out surface treatment on the wood-plastic composite board welded by the ultrasonic welding machine to complete the welding of the wood-plastic composite board.
The composite material comprises the following raw materials in parts by weight: 40-60 parts of wood powder, 20-30 parts of resin and 1.5-4 parts of coupling agent; 1-2 parts of foaming agent, 0.5-0.7 part of solubilizer and 0.2-0.3 part of lubricant.
The inner side surface of the upper surface layer is provided with an upper rib which is integrated with the upper surface layer, the inner side surface of the lower surface layer is provided with a lower rib which is integrated with the lower surface layer, and the upper rib and the lower rib are arranged oppositely from top to bottom.
The ultrasonic hot-press welding device comprises a support frame, an operating platform arranged on the support frame, and a hot-press box arranged at the upper part of the operating platform;
the middle part of the operation platform is provided with a transportation device for transporting the wood-plastic composite board, the upper surface of the transportation device is level with the table top of the operation platform, and two ends of the transportation device respectively extend out of the inlet and the outlet arranged at the bottoms of two sides of the hot-pressing box;
a lifting pushing oil cylinder is fixedly arranged in the supporting frame, a bearing ultrasonic heating plate is fixedly connected with the telescopic end of the lifting pushing oil cylinder, and when the lifting pushing oil cylinder drives the bearing ultrasonic heating plate to move upwards, the wood-plastic composite plate on the conveying device enters the bearing ultrasonic heating plate; the upper end in the hot pressing box is provided with a lower pressure-bearing oil cylinder, a telescopic end of the lower pressure-bearing oil cylinder is fixedly connected with a lower pressure ultrasonic heating plate, the lower pressure ultrasonic heating plate is positioned right above the bearing ultrasonic heating plate, and the lower pressure ultrasonic heating plate and the bearing ultrasonic heating plate are respectively connected with an ultrasonic generator at the top of the hot pressing box.
The conveyer is including establishing two sets of belt pulley groups in the operation platform below, the winding has the transportation belt on every set of belt pulley group, and wood-plastic composite board carries on the transportation belt on two sets of belt pulley groups.
The bearing ultrasonic heating plate comprises a lower ultrasonic heating head mounting plate and a bearing heat guide plate fixedly arranged at the upper end of the ultrasonic heating head mounting plate, and two sides of the ultrasonic heating head mounting plate are provided with flanges extending upwards;
the lower-pressure ultrasonic heating plate comprises an upper ultrasonic heating head mounting plate, and a lower-pressure heat conducting plate is fixedly arranged below the upper ultrasonic heating head mounting plate;
a plurality of embedding holes are uniformly formed in the lower ultrasonic heating head mounting plate and the upper ultrasonic heating head mounting plate, an ultrasonic heating head is fixedly arranged in each embedding hole, and the heating heads are connected with an ultrasonic generator;
the flexible end of promotion hydro-cylinder that rises and the bottom central point of lower ultrasonic heating head mounting panel put fixed connection, the flexible end of pressure-bearing hydro-cylinder puts fixed connection with the top central point of last ultrasonic heating head mounting panel down, the width of going up the ultrasonic heating head mounting panel is the same with the width of the cavity that forms through the turn-ups on the ultrasonic heating head mounting panel down.
The both sides of hot pressing incasement wall are equipped with the fixed stay electric jar of mutual symmetry, the flexible end fixedly connected with who supports the electric jar supports the locating pin, the both sides of lower ultrasonic heating head mounting panel are equipped with and should support locating pin complex constant head tank.
Still include microprocessor, establish and be used for detecting on bearing the weight of the ultrasonic wave hot plate whether the wood-plastic composite board falls on bearing the weight of the first displacement sensor on the ultrasonic wave hot plate, fixed establish and be used for detecting the second displacement sensor who bears the weight of the ultrasonic wave hot plate rising position in hot pressing incasement side, first displacement sensor and second displacement sensor are connected with microprocessor's input electricity, microprocessor's output is connected with pressure-bearing hydro-cylinder, the promotion hydro-cylinder that rises and supersonic generator electricity down respectively.
The invention has the beneficial effects that: the ultrasonic hot-pressing method can be used for quickly carrying out hot pressing and welding, the upper surface and the lower surface of the wood-plastic composite board cannot be damaged, the upper surface and the lower surface of the wood-plastic composite board after welding are smooth, glue overflowing is avoided, meanwhile, the efficiency of wood-plastic composite board manufacturing is improved, the manufacturing time is shortened, and the cost is saved.
Drawings
FIG. 1 is a schematic structural view of a wood-plastic composite panel according to the present invention;
FIG. 2 is a schematic structural view of an ultrasonic thermocompression bonding apparatus according to the present invention;
FIG. 3 is a schematic view of a press-down ultrasonic heater plate in an ultrasonic thermocompression bonding apparatus;
FIG. 4 is a view of a load bearing ultrasonic heater plate in an ultrasonic thermocompression bonding apparatus;
fig. 5 shows an electrical connection housing in the ultrasonic thermocompression bonding apparatus.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
An ultrasonic welding method for a wood-plastic composite material is characterized in that the wood-plastic composite material is formed by integrally pressing an upper surface layer 1, a composite material 3 and a lower surface layer 2, particularly, in the design process, for the integral strength of the whole wood-plastic composite material, an upper rib 4 integrated with the upper surface layer 1 is arranged on the inner side surface of the upper surface layer 1, a lower rib 5 integrated with the lower surface layer 2 is arranged on the inner side surface of the lower surface layer 2, and the upper rib 4 and the lower rib 5 are arranged up and down oppositely. When the upper ribs and the lower ribs are arranged oppositely, the upper ribs and the lower ribs can mutually abut against each other when the wood-plastic composite board bears force, so that the stress of the whole wood-plastic composite board is improved, and the wood-plastic composite board is more reliable in the using process;
the composite material 3 is composed of wood powder, resin, a coupling agent, a foaming agent, a solubilizer and a lubricant, and the components are proportioned according to the following parts by mass: 40-60 parts of wood powder, 20-30 parts of resin and 1.5-4 parts of coupling agent; 1-2 parts of foaming agent, 0.5-0.7 part of solubilizer, 0.2-0.3 part of lubricant:
in the embodiment, the composite material 3 is prepared by the following components: the wood-plastic composite board comprises 50 parts of wood powder, 25 parts of resin, 2.7 parts of coupling agent, 1.5 parts of foaming agent and 0.6 part of solubilizer, and the composite material can be fully filled between an upper surface layer and a lower surface layer when in use, so that the strength of the manufactured wood-plastic composite board is ensured, and in the process of hot pressing, the resin, the coupling agent, the foaming agent and the solubilizer can be fully combined with the wood powder to bond the wood powder into a whole and simultaneously condense the wood powder into a whole with the upper surface layer and the lower surface layer to ensure the integrity of the wood-plastic composite board;
the method specifically comprises the following steps:
the method comprises the following steps: placing the mixed composite material 3 between the upper surface layer 1 and the lower surface layer 2, and pressing the formed wood-plastic composite board formed by the upper surface layer 1, the composite material 3 and the lower surface layer 2 by a plate pressing machine; the composite material is well matched according to the designed proportion, the composite material is filled on the lower surface layer, then the upper surface layer is buckled on the lower surface layer, the composite material is completely filled between the upper surface layer and the lower surface layer, the buckled plate is pressed on a plate pressing machine, the pressure of the plate pressing machine in the plate pressing process is 500N, and the upper surface layer, the composite material and the lower surface layer can be fully pressed into a whole;
step two: putting the wood-plastic composite board subjected to the plate pressing into an ultrasonic hot-press welding device for ultrasonic hot-press welding, wherein the pressure is 230N-280N when the hot-press welding is carried out, the hot-press stability is 60-80 ℃, and the hot-press time is 30-60 s; the composite material enters an ultrasonic hot-press welding device, the ultrasonic hot-press welding device pressurizes the entering wood-plastic composite board again, the composite material is heated through ultrasonic waves in the pressurizing process, secondary hot melting of the composite material is guaranteed, the hot-melted composite material flows secondarily through pressurization, the composite material can be fully fused with an upper surface layer and a lower surface layer into a whole, the strength of the formed wood-plastic composite board is better, meanwhile, under the heating condition, foaming expansion of a foaming agent in the composite material is carried out, and meanwhile, hot pressing is carried out, and the condition of cold contraction after the composite material is integrated and temperature recovery is avoided;
step three: butting the wood-plastic composite boards subjected to ultrasonic hot-pressing welding, placing energy guide strips at the butted positions, and mutually fixing and pressing the energy guide strips; the energy guide strip is mainly made of materials such as resin and the like, the manufactured plates can be connected, and the shape of the energy guide strip can be determined through a gap when the plates are butted when the plates are connected;
step four: heating the energy guide strips by an ultrasonic welding machine to melt the energy guide strips and the end parts of the butted wood-plastic composite plates and connecting the butted wood-plastic composite plates; the energy guide strips are hot-melted when heated by the ultrasonic welding machine to form a molten state, the energy guide strips in the molten state are bonded with the end parts of the wood-plastic composite boards on the two sides, and part of the energy guide strips enter the composite materials in the wood-plastic composite boards, so that the two wood-plastic composite boards can be fixedly connected.
Step five: and carrying out surface treatment on the wood-plastic composite board welded by the ultrasonic welding machine to complete the welding of the wood-plastic composite board. The surface treatment comprises surface cleaning, surface deburring and cutting of the edge of the molded wood-plastic composite board, and the edge of the wood-plastic composite board which is not compacted is cut off.
Example 2
In order to ensure that the ultrasonic hot-press welding can be automatically completed at one time and can completely carry out hot-press, as shown in fig. 2, the ultrasonic hot-press welding device comprises a support frame 5, an operating platform 6 arranged on the support frame 5, and a hot-press box 7 arranged at the upper part of the operating platform 6; the supporting frame is used as the basis of the whole device and is formed into a frame body or a bracket shape, the operation platform 6 is used for placing the wood-plastic composite board after being pressed, and therefore the surface of the operation platform 6 is kept horizontal; the hot pressing box 7 is used for carrying out ultrasonic hot pressing treatment on the wood-plastic composite board;
a conveying device for conveying the wood-plastic composite board is arranged in the middle of the operating platform 6, the upper surface of the conveying device is parallel to the table top of the operating platform 6, and two ends of the conveying device respectively extend out of the inlet and outlet 14 formed in the bottom of two sides of the hot-pressing box 7;
the conveyer transport the wood-plastic composite board of putting into on operation platform 6, this conveyer puts including establishing two sets of belt pulley group 12 in operation platform 6 below during concrete, the winding has transportation belt 13 on every a set of belt pulley group 12, wood-plastic composite board carries on transportation belt 13 on two sets of belt pulley group 12. The two groups of belt pulley sets 12 are arranged on the front side and the rear side in the operation platform shown in fig. 1, and meanwhile, the belts 13 are arranged in parallel, so that when the wood-plastic composite board is used, the wood-plastic composite board can be carried on the belts 13 which are parallel to each other, enters from the inlet and outlet 14 at the left side of the hot pressing box 7 through the belts 13, and exits from the inlet and outlet at the right side of the hot pressing box 7 after being subjected to hot pressing; when in use, the two groups of belt pulleys can be driven by a driving device such as a motor to synchronously rotate or are respectively connected with a synchronous motor to synchronously rotate, the technology belongs to the common general knowledge in the technical field and is not described in detail herein; the wood-plastic composite board is transported in a carrying mode by adopting double belts, and the wood-plastic composite board can be supported from the belts to be hot-pressed when the wood-plastic composite board is hot-pressed;
a lifting pushing oil cylinder 11 is fixedly arranged in the supporting frame 5, a bearing ultrasonic heating plate 8 is fixedly connected to the telescopic end of the lifting pushing oil cylinder 11, and when the lifting pushing oil cylinder 11 drives the bearing ultrasonic heating plate 8 to move upwards, the wood-plastic composite board on the conveying device enters the bearing ultrasonic heating plate 8; the upper end in the hot pressing box 7 is equipped with down pressure-bearing hydro-cylinder 10, fixedly connected with pushes down ultrasonic heating board 9 on the flexible end of pressure-bearing hydro-cylinder 10 down, and should push down ultrasonic heating board 9 and be located and bear ultrasonic heating board 8 directly over, push down ultrasonic heating board 9 and bear ultrasonic heating board 8 and be connected with supersonic generator 15 at hot pressing box 7 top respectively.
The lifting pushing oil cylinder and the lower bearing oil cylinder 10 both adopt the existing commonly used hydraulic oil cylinder, the specific model and the rule can be selected according to the bearing force required by the lifting pushing oil cylinder 11 when the lifting pushing oil cylinder is used, the bearing ultrasonic heating plate 8 can be pushed to move upwards, the wood-plastic composite board enters the bearing ultrasonic heating plate 8 and then is pushed to continue to move upwards by the lifting pushing oil cylinder, the lower bearing oil cylinder 10 drives the lower pressing ultrasonic heating plate 9 to move downwards, the lower pressing ultrasonic pressurizing plate 9 is pressed on the wood-plastic composite board on the bearing ultrasonic heating plate 8, simultaneously the lower pressing ultrasonic pressurizing plate 9 and the bearing ultrasonic heating plate 8 heat the wood-plastic composite board under the action of an ultrasonic generator, the composite material in the heated wood-plastic composite board is subjected to secondary hot melting, and secondary pressing is carried out under the action of the lifting pushing oil cylinder and the lower bearing oil cylinder, the wood-plastic composite board is subjected to secondary hot pressing, the internal structure of the wood-plastic composite board after hot pressing is guaranteed to be more stable and better in light degree, and meanwhile, the space in the wood-plastic composite board can be smaller, and the waterproof performance is stronger.
Specifically, as shown in fig. 4, the ultrasonic heating plate 8 includes a lower ultrasonic heating head mounting plate 801 and a heat-bearing plate 802 fixedly disposed at an upper end of the ultrasonic heating head mounting plate 801, and two sides of the ultrasonic heating head mounting plate 801 are provided with flanges 803 extending upward; specifically, a certain distance is provided between the two ends of the turned-over edge 803 and the two side surfaces of the front side and the rear side of the ultrasonic heating installation plate 801, so that the normal operation of a belt can not be affected in the rising process, specifically, when the telescopic end of the rising push cylinder is fixedly connected with the bottom of the ultrasonic heating installation plate 801, the ultrasonic heating head 17 adopts the currently common ultrasonic heating head, the detailed description of the unaligned structure is not provided, the ultrasonic heating head is respectively embedded in a plurality of embedding holes 18 formed in the ultrasonic heating installation plate 801, ultrasonic energy is provided through an ultrasonic generator, the ultrasonic heating head generates heat and transmits the heat to the bearing heat conduction plate 802, the heat is uniformly distributed through the bearing heat conduction plate 802 and then transmitted to the wood-plastic composite plate, and the heat can be effectively and uniformly distributed while the heating through ultrasonic is ensured, guarantee that whole wood-plastic composite board can carry out even being heated when heating.
As shown in fig. 3, the pressing-down ultrasonic heating plate 9 includes an upper ultrasonic heating head mounting plate 901, and a pressing-down heat conduction plate 902 is fixedly disposed below the upper ultrasonic heating head mounting plate 901; this push down ultrasonic heating plate's structure is the same with bearing ultrasonic heating plate 8, guarantees to carry out mutual cooperation with bearing ultrasonic heating plate 8 and carries out hot pressing work to wood-plastic composite board.
Further, in order to ensure that the bearing ultrasonic heating plate 8 can be effectively positioned and fixed in the hot pressing process and further ensure that the bearing ultrasonic heating plate is more stable when being matched with the pressing ultrasonic heating plate 9, as shown in fig. 1 and 4, two sides of the inner wall of the hot pressing box 7 are provided with the fixed supporting electric cylinders 16 which are symmetrical to each other, the telescopic ends of the supporting electric cylinders 16 are fixedly connected with the supporting positioning pins, and two sides of the lower ultrasonic heating head mounting plate 801 are provided with positioning grooves 804 matched with the supporting positioning pins. When using, when the promotion hydro-cylinder 11 that rises promotes to bear during ultrasonic wave hot plate 8 moves the height of fixed stay electric cylinder 16, fixed stay electric cylinder 16 extension will support the locating pin and insert in constant head tank 704, fix a position bearing ultrasonic wave hot plate 8, when pushing down ultrasonic wave hot plate simultaneously and pushing down, this fixed stay electric cylinder can assist promotion hydro-cylinder work effect to the support that bears ultrasonic wave hot plate 8, guarantee that it bears ultrasonic wave hot plate 8's stability, after accomplishing the hot pressing, the withdrawal of fixed stay electric cylinder, the promotion hydro-cylinder that rises descends, when bearing ultrasonic wave hot plate 8 and descend under the belt, the wood-plastic composite sheet stays on the belt, in the hot pressing box is taken through the belt.
Example 3
On the basis of embodiment 2, in order to ensure that the whole ultrasonic hot-press welding device can perform automatic hot-pressing when in use, as shown in fig. 5, the ultrasonic hot-press welding device further comprises a microprocessor, a first displacement sensor arranged on the bearing ultrasonic heating plate 8 and used for detecting whether the wood-plastic composite board falls on the bearing ultrasonic heating plate 8, and a second displacement sensor fixedly arranged on the inner side of the hot-press box 7 and used for detecting the ascending position of the bearing ultrasonic heating plate 8, wherein the first displacement sensor and the second displacement sensor are electrically connected with the input end of the microprocessor, and the output end of the microprocessor is electrically connected with the lower pressure-bearing oil cylinder 10, the ascending push oil cylinder 11 and the ultrasonic generator 15 respectively.
When the conveying device conveys the wood-plastic composite board into the hot pressing box, the first displacement sensor sends position information to the microprocessor when detecting that the wood-plastic composite board is positioned right above the bearing ultrasonic heating plate, the microprocessor sends an action instruction to the conveying device and the upper pressure-bearing oil cylinder, at the moment, the conveying device and the upper pressure-bearing oil cylinder receive the action instruction, the conveying device stops working, at the moment, the upper pressure-bearing oil cylinder rises, the wood-plastic composite board carried on the conveying device falls onto the bearing ultrasonic heating plate 8, when the second displacement sensor detects that the bearing ultrasonic heating plate 8 reaches a specified position and sends position information to the microprocessor, the microprocessor controls the lower pressure-bearing oil cylinder to drive the lower pressure ultrasonic heating plate to descend, at the moment, the microprocessor also controls the ultrasonic generator to send ultrasonic waves to the ultrasonic heating head, when the lower pressure ultrasonic heating plate is contacted with the, microprocessor count down according to the time of settlement, carry out the hot pressing to wood-plastic composite board, after the time of hot pressing is accomplished, microprocessor simultaneous control down pressure-bearing hydro-cylinder with rise and promote the hydro-cylinder withdrawal, it promotes the hydro-cylinder and drives wood-plastic composite board down to rise, when wood-plastic composite board falls on the conveyer, the conveyer transports wood-plastic composite board out of the hot pressing case, accomplish the hot pressing of wood-plastic composite board, enter into next grade work, automatic hot pressing has been realized, the effectual time of having saved, the work efficiency is improved, the human cost has been saved.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, and all designs identical or similar to the present invention are within the scope of the invention.
Claims (8)
1. The ultrasonic welding method of the wood-plastic composite material is characterized by comprising the following steps:
the method comprises the following steps: placing the mixed composite material (3) between the upper surface layer (1) and the lower surface layer (2), and pressing the wood-plastic composite board formed by the upper surface layer (1), the composite material (3) and the lower surface layer (2) by a plate pressing machine;
step two: putting the wood-plastic composite board subjected to the plate pressing into an ultrasonic hot-press welding device for ultrasonic hot-press welding, wherein the pressure is 230N-280N when the hot-press welding is carried out, the hot-press stability is 60-80 ℃, and the hot-press time is 30-60 s;
step three: butting the wood-plastic composite boards subjected to ultrasonic hot-pressing welding, placing energy guide strips at the butted positions, and mutually fixing and pressing the energy guide strips;
step four: heating the energy guide strips by an ultrasonic welding machine to melt the energy guide strips and the end parts of the butted wood-plastic composite plates and connecting the butted wood-plastic composite plates;
step five: and carrying out surface treatment on the wood-plastic composite board welded by the ultrasonic welding machine to complete the welding of the wood-plastic composite board.
2. The ultrasonic welding method for the wood-plastic composite material according to claim 1, wherein the composite material comprises the following raw materials in parts by weight: 40-60 parts of wood powder, 20-30 parts of resin and 1.5-4 parts of coupling agent; 1-2 parts of foaming agent, 0.5-0.7 part of solubilizer and 0.2-0.3 part of lubricant.
3. The ultrasonic welding method for the wood-plastic composite material according to claim 1, wherein the inner side surface of the upper surface layer (1) is provided with an upper rib (4) integrated with the upper surface layer (1), the inner side surface of the lower surface layer (2) is provided with a lower rib (5) integrated with the lower surface layer (2), and the upper rib (4) and the lower rib (5) are arranged in a vertically opposite manner.
4. The ultrasonic welding method for the wood-plastic composite material is characterized by comprising a supporting frame (5), an operating platform (6) arranged on the supporting frame (5), and a hot-pressing box (7) arranged at the upper part of the operating platform (6);
the middle part of the operation platform (6) is provided with a transportation device for transporting the wood-plastic composite board, the upper surface of the transportation device is level with the table top of the operation platform (6), and two ends of the transportation device respectively extend out of the inlet and outlet (14) arranged at the bottom of two sides of the hot-pressing box (7);
a lifting pushing oil cylinder (11) is fixedly arranged in the supporting frame (5), a bearing ultrasonic heating plate (8) is fixedly connected with the telescopic end of the lifting pushing oil cylinder (11), and when the lifting pushing oil cylinder (11) drives the bearing ultrasonic heating plate (8) to move upwards, the wood-plastic composite board on the conveying device enters the bearing ultrasonic heating plate (8); the upper end in hot-pressing case (7) is equipped with down pressure-bearing hydro-cylinder (10), fixedly connected with pushes down ultrasonic heating board (9) on the flexible end of pressure-bearing hydro-cylinder (10) down, and should push down ultrasonic heating board (9) and be located and bear ultrasonic heating board (8) directly over, push down ultrasonic heating board (9) and bear ultrasonic heating board (8) and be connected with supersonic generator (15) at hot-pressing case (7) top respectively.
5. The ultrasonic welding method for the wood-plastic composite material is characterized in that the conveying device comprises two groups of belt pulley sets (12) arranged below the operating platform (6), a conveying belt (13) is wound on each group of belt pulley sets (12), and the wood-plastic composite board is carried on the conveying belts (13) on the two groups of belt pulley sets (12).
6. The ultrasonic welding method for the wood-plastic composite material is characterized in that the ultrasonic bearing heating plate (8) comprises a lower ultrasonic heating head mounting plate (801) and a bearing heat conducting plate (802) fixedly arranged at the upper end of the ultrasonic heating head mounting plate (801), wherein two sides of the ultrasonic heating head mounting plate (801) are provided with flanges (803) extending upwards;
the lower-pressure ultrasonic heating plate (9) comprises an upper ultrasonic heating head mounting plate (901), and a lower-pressure heat conducting plate (902) is fixedly arranged below the upper ultrasonic heating head mounting plate (901);
a plurality of embedding holes (18) are uniformly formed in the lower ultrasonic heating head mounting plate (801) and the upper ultrasonic heating head mounting plate (901), an ultrasonic heating head (17) is fixedly arranged in each embedding hole (18), and the heating heads (17) are connected with an ultrasonic generator (15);
the telescopic end of the lifting pushing oil cylinder (11) is fixedly connected with the bottom center position of the lower ultrasonic heating head mounting plate (801), and the telescopic end of the lower pressure-bearing oil cylinder (10) is fixedly connected with the top center position of the upper ultrasonic heating head mounting plate (901).
7. The ultrasonic welding method for the wood-plastic composite material is characterized in that the two sides of the inner wall of the hot pressing box (7) are provided with the mutually symmetrical fixed supporting electric cylinders (16), the telescopic ends of the supporting electric cylinders (16) are fixedly connected with supporting positioning pins, and the two sides of the lower ultrasonic heating head mounting plate (801) are provided with positioning grooves (804) matched with the supporting positioning pins.
8. The ultrasonic welding method for the wood-plastic composite material is characterized by further comprising a microprocessor, a first displacement sensor arranged on the bearing ultrasonic heating plate (8) and used for detecting whether the wood-plastic composite board falls on the bearing ultrasonic heating plate (8), and a second displacement sensor fixedly arranged on the inner side of the hot pressing box (7) and used for detecting the ascending position of the bearing ultrasonic heating plate (8), wherein the first displacement sensor and the second displacement sensor are electrically connected with the input end of the microprocessor, and the output end of the microprocessor is electrically connected with the lower pressure bearing oil cylinder (10), the ascending pushing oil cylinder (11) and the ultrasonic generator (15) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010171797.7A CN111331851A (en) | 2020-03-12 | 2020-03-12 | Ultrasonic welding method for wood-plastic composite material |
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| CN202010171797.7A CN111331851A (en) | 2020-03-12 | 2020-03-12 | Ultrasonic welding method for wood-plastic composite material |
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| CN111331851A true CN111331851A (en) | 2020-06-26 |
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| CN202010171797.7A Pending CN111331851A (en) | 2020-03-12 | 2020-03-12 | Ultrasonic welding method for wood-plastic composite material |
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Cited By (1)
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| CN112548302A (en) * | 2020-11-18 | 2021-03-26 | 马鞍山久泰渔具有限公司 | Automatic welding equipment for fishing gear box accessories |
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