CN108000853B - Compression molding pre-paving method and system for wood-plastic composite product - Google Patents
Compression molding pre-paving method and system for wood-plastic composite product Download PDFInfo
- Publication number
- CN108000853B CN108000853B CN201711314456.5A CN201711314456A CN108000853B CN 108000853 B CN108000853 B CN 108000853B CN 201711314456 A CN201711314456 A CN 201711314456A CN 108000853 B CN108000853 B CN 108000853B
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- wood
- plastic composite
- composite material
- compression molding
- conveyor belt
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Classifications
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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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/261—Handling means, e.g. transfer means, feeding means
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
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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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
Abstract
The invention discloses a compression molding pre-paving method and a system for a wood-plastic composite material product, wherein the system comprises an extruder, a metering device, a pre-paving manipulator, a heat-insulating conveyor belt, a feeding manipulator and a molding press; the extruder and the metering device meter and output the wood-plastic composite material blocks with the quantity required by compression molding according to the product requirements of processed products; laying a wood-plastic composite material block to a designated position; and synchronously conveying a group of wood-plastic composite material blocks to a station to be fed, and conveying the group of wood-plastic composite material blocks reaching the station to be fed into a die cavity of a die press at one time, wherein the die press completes the compression molding process. The invention not only ensures the molding property of the wood-plastic composite material and greatly improves the quality of the wood-plastic composite material product, but also improves the processing efficiency, is economical and environment-friendly, and has wide application field and development prospect.
Description
Technical Field
The invention belongs to the technical field of material molding, and particularly relates to a compression molding pre-paving method and system for a wood-plastic composite product.
Background
With the improvement of environmental protection consciousness and the national advocacy of circular economy and sustainable development, the wood-plastic composite material attracts attention. The high-strength and high-elasticity wood fiber or plant fiber is maintained, and the high-toughness and fatigue resistance of the thermoplastic high-molecular material are possessed, so that the high-strength and high-elasticity wood fiber or plant fiber composite material can be recycled, and is economical and environment-friendly.
In the traditional wood-plastic composite product, a one-die multi-cavity processing technology is adopted in the compression molding processing process, and although the processing rate can be improved, as wood-plastic composite material blocks are laid for a plurality of times, the temperature difference among the blocks to be molded entering each die cavity is large, the compression molding performance is inconsistent, and defective products and inferior products are easy to appear; in the processing technology of large products, if a single large-size material block is put in at a time, the wood-plastic composite material is poor in fluidity, so that the large products are difficult to successfully mold, and the defective rate is high.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a compression molding pre-paving method for a wood-plastic composite product, which replaces a large-size single block with a plurality of small-size blocks which are scattered and placed, solves the problem that a large product is difficult to mold when the large single block is used, can effectively reduce the defective rate of the large product, and improves the processing quality and the processing efficiency.
Another object of the invention is to provide a compression molding pre-paving system for wood-plastic composite products.
The aim of the invention is achieved by the following technical scheme:
a compression molding pre-paving method for a wood-plastic composite product comprises the following steps: pre-calculating the total material quantity required by the large product, and decomposing the total material quantity into a plurality of small-size material blocks; a plurality of small-size material blocks are laid in a distributed manner, and the laying positions capable of guaranteeing the optimal molding performance of the small-size material blocks are analyzed; according to the optimal laying number and the optimal laying positions obtained through pre-calculation and analysis, small-size material blocks are laid on a conveyor belt one by one, and are sent into a die cavity of a die press at one time, and the die press completes a die press molding process.
Preferably, a heat preservation device is arranged on a conveyor belt for conveying the material blocks, and after the heat preservation device is used for carrying out heat preservation and conveying, the consistency of the temperature of each wood-plastic composite material block is ensured, and further the molding performance of the wood-plastic composite material block is ensured.
A compression molding pre-paving system for wood-plastic composite products comprises an extruder, a metering device, a pre-paving manipulator, a conveyor belt, a feeding manipulator and a molding press; the extruder and the metering device are matched with each other, and the wood-plastic composite material block with the quantity required by compression molding is metered and output according to the product requirement of the processed product; the pre-paving manipulator lays the wood-plastic composite material block to a designated position according to a pre-paving scheme of compression molding; the conveyor belt synchronously conveys a group of wood-plastic composite material blocks to a station to be fed, the feeding manipulator conveys the group of wood-plastic composite material blocks reaching the station to be fed into a die cavity of a die press at one time, and the die press completes a compression molding process.
Preferably, the discharge port of the extruder is connected with a metering device, the discharge port and the metering device are matched with each other, and the wood-plastic composite material block with the quantity required by compression molding is metered and output according to the product requirement of the processed product.
Preferably, in the compression molding process of the wood-plastic composite material one-die multi-cavity product, the pre-paving manipulator lays the wood-plastic composite material blocks metered and output by the metering device on the conveyor belt one by one according to the number of die cavities and the relative positions of the die cavities of a die press adopted in the one-die multi-cavity process.
Preferably, in the compression molding process of the large wood-plastic composite product, the pre-laying manipulator lays the wood-plastic composite blocks metered and output by the metering device on the conveyor belt one by one according to the optimal laying number and positions of the wood-plastic composite blocks obtained through pre-calculation and analysis.
Preferably, the conveyor belt is a heat-insulating conveyor belt, and consists of a conveyor belt and an insulation box, the wood-plastic composite material blocks are conveyed to a station to be fed through the conveyor belt, and the insulation box ensures that the wood-plastic composite material blocks keep constant and consistent temperature in the conveying process.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the compression molding pre-paving method and system for the wood-plastic composite product provided by the invention have the advantages that the structural flow is simple, the operation is easy, the good compression molding performance of the wood-plastic composite is ensured, the compression molding process of one-die multi-cavity and large-piece products of the wood-plastic composite product is realized with high quality at lower cost, and the product quality and the processing efficiency of the wood-plastic composite product are greatly improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the system.
Fig. 2 is a flow chart of an implementation of the system.
FIG. 3 is a schematic diagram of the system in a one-die, multi-cavity compression molding operation.
FIG. 4 is a schematic diagram of the system during compression molding of a large article.
Fig. 5 is a schematic diagram of the structure of the insulated conveyor belt of the system.
Wherein, 1-extruder, 2-metering device, 3-shop manipulator, 4-heat preservation conveyer belt, 5-feeding manipulator, 6-moulding press, 7-wood-plastic composite material piece, 8-mould, 9-conveyer belt, 10-insulation can.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Examples
A wood-plastic composite product compression molding pre-paving method and system, the method and system are mainly used in a wood-plastic composite one-die multi-cavity and large product compression molding process, in a one-die multi-cavity processing process, a heat preservation conveyor belt is adopted to preserve heat of wood-plastic composite material blocks in the conveying process, the consistency of the temperature of the wood-plastic composite material blocks entering each die cavity of a molding press is ensured, the compression molding performance is improved, and defective products and inferior products are reduced; in the processing technology of the large product, single large-size material blocks are replaced by a plurality of small-size material blocks which are scattered and placed, and the optimal placement quantity and the corresponding positions of the material blocks are simulated and analyzed in advance on a computer, so that the problem that the large product is difficult to form when the single large-size material block is used is solved, the defective rate of the large product can be effectively reduced, and the processing quality and the processing efficiency are improved.
As shown in fig. 1, is a general structural schematic of the present invention. A compression molding pre-paving system for wood-plastic composite products comprises an extruder 1, a metering device 2, a pre-paving manipulator 3, a heat-insulating conveyor belt 4, a feeding manipulator 5 and a molding press 6. Wherein, the discharge port of the extruder 1 is connected with the metering device 2, the two are matched with each other, and the quantity of the wood-plastic composite material block 7 required by compression molding is metered and output according to the product requirement of the processed product; the pre-paving manipulator 3 lays the wood-plastic composite material block 7 to a designated position according to a pre-paving scheme of compression molding; the heat-insulating conveyor belt 4 synchronously conveys a group of wood-plastic composite material blocks to a station to be fed, the station is composed of a conveyor belt 9 and an insulating box 10, the wood-plastic composite material blocks are conveyed to the station to be fed through the conveyor belt 9, the insulating box 10 ensures that the wood-plastic composite material blocks keep constant and consistent temperature in the conveying process, and excellent state characteristics of the wood-plastic composite material blocks are ensured, so that the wood-plastic composite material blocks can be processed later, and the processing quality of products is improved; the feeding manipulator 5 sends a group of wood-plastic composite material blocks reaching the station to be fed into the die cavity of the die 8 of the die press 6 at one time, and the die press 6 completes the die pressing forming process.
As shown in fig. 2, a flow chart of the implementation is shown. The plastic particles and the wood-plastic fibers are pretreated, mixed according to a certain proportion, extruded and molded by an extruder 1, enter a metering device 2, the metering device 2 meters and outputs corresponding wood-plastic composite material blocks 7 according to the required material quantity of the wood-plastic composite material products, a pre-paving manipulator 3 intelligently lays the wood-plastic composite material blocks on a heat preservation conveyor belt 4 one by one, the heat preservation and the transmission of the heat preservation conveyor belt 4 are carried out, the temperature consistency of a group of wood-plastic composite material blocks is ensured, the excellent moldability is ensured, finally, the wood-plastic composite material blocks reaching a station to be fed are fed into a die 8 cavity of a die press 6 by a feeding manipulator 5 at one time, and the die press molding process of the wood-plastic composite material products is completed by the die press 6.
In an embodiment of the present invention, as shown in fig. 3, a schematic structure of a multi-cavity molding process is shown, and a four-cavity mold is assumed as an example. The pre-paving manipulator 3 intelligently lays the wood-plastic composite material blocks 7 metered and output by the metering device on the heat preservation conveyor belt 4 one by one according to the number of the die cavities and the relative positions of the die cavities of the die presses 6 adopted by the one-die multi-cavity process, and ensures the consistency of the temperature of each wood-plastic composite material block after heat preservation and conveying of the heat preservation conveyor belt 4, thereby ensuring the molding performance of the wood-plastic composite material blocks. When a group of wood-plastic composite material blocks reach a station to be fed, the material blocks are fed into a die 8 cavity of a die press 6 at one time by a feeding manipulator 5, and the die press 6 completes a die pressing forming process.
In one embodiment of the present invention, as shown in fig. 4, a schematic structure of a molding process of a large product is shown, in which the optimal placement positions and the number of wood-plastic composite material blocks used in the molding process of the large product are shown. The material quantity required by a large product is calculated in advance, a plurality of small-size material blocks are distributed and laid, and the laying positions and the laying quantity which can ensure the optimal molding performance of the wood-plastic composite material blocks are analyzed. The pre-paving manipulator 3 intelligently lays the wood-plastic composite material blocks 7 metered and output by the metering device on the heat preservation conveyor belt 4 one by one according to the optimal laying quantity and the optimal laying positions of the wood-plastic composite material blocks 7 obtained through pre-calculation and analysis, and ensures the consistency of the temperature of each wood-plastic composite material block after heat preservation and conveying of the heat preservation conveyor belt 4, so that the molding performance of the wood-plastic composite material blocks is ensured. When the wood-plastic composite material block reaches the station to be fed, the material block is fed into a die cavity of a die 8 of a die press 6 at one time by a feeding manipulator 5, and the die press 6 completes the compression molding process.
As shown in fig. 5, the heat-insulation conveyor belt 4 is composed of a conveyor belt 9 and an insulation box 10, the wood-plastic composite material blocks are conveyed to a station to be fed through the conveyor belt 9, the insulation box 10 ensures that the wood-plastic composite material blocks keep constant and consistent temperature in the conveying process, and excellent state characteristics of the wood-plastic composite material blocks are ensured, so that the wood-plastic composite material blocks can be processed later, and the processing quality of products is improved.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (6)
1. A method for pre-paving a wood-plastic composite product by compression molding, which is characterized by comprising the following steps: pre-calculating the total material quantity required by the large product, and decomposing the total material quantity into a plurality of small-size material blocks; a plurality of small-size material blocks are laid in a distributed manner, and the laying positions capable of guaranteeing the optimal molding performance of the small-size material blocks are analyzed; according to the optimal laying number and the optimal laying positions obtained by pre-calculation and analysis, small-size material blocks are laid one by one on a conveyor belt, and are sent into a die cavity of a die press at one time, and a die press completes a die press molding process;
and a heat preservation device is arranged on a conveyor belt for conveying the material blocks, and after heat preservation and conveying, the consistency of the temperature of each wood-plastic composite material block is ensured, so that the molding performance of the wood-plastic composite material block is ensured.
2. The compression molding pre-paving system for the wood-plastic composite product based on the method of claim 1, which is characterized by comprising an extruder, a metering device, a pre-paving manipulator, a conveyor belt, a feeding manipulator and a molding press; the extruder and the metering device are matched with each other, and the wood-plastic composite material block with the quantity required by compression molding is metered and output according to the product requirement of the processed product; the pre-paving manipulator lays the wood-plastic composite material block to a designated position according to a pre-paving scheme of compression molding; the conveyor belt synchronously conveys a group of wood-plastic composite material blocks to a station to be fed, the feeding manipulator conveys the group of wood-plastic composite material blocks reaching the station to be fed into a die cavity of a die press at one time, and the die press completes a compression molding process.
3. The compression molding pre-paving system of the wood-plastic composite product according to claim 2, wherein the discharge port of the extruder is connected with the metering device, and the discharge port and the metering device are matched with each other, so that the wood-plastic composite material block with the quantity required by compression molding is metered and output according to the product requirement of the processed product.
4. The system for pre-laying wood-plastic composite products according to claim 2, wherein in the process of compression molding the wood-plastic composite multi-cavity products, the pre-laying manipulator lays wood-plastic composite blocks metered and output by the metering device on the conveyor one by one according to the number of die cavities and the relative positions of the die cavities of a die press adopted in the process of compression molding the multi-cavity products.
5. The compression molding pre-laying system of wood-plastic composite products according to claim 2, wherein in the compression molding process of the large wood-plastic composite products, the pre-laying manipulator lays the wood-plastic composite blocks metered and output by the metering device on the conveyor belt one by one according to the optimal laying number and position of the wood-plastic composite blocks obtained by pre-calculation and analysis.
6. The compression molding pre-paving system of the wood-plastic composite product according to claim 2, wherein the conveyor belt is a heat preservation conveyor belt, the heat preservation conveyor belt consists of a conveyor belt and an insulation box, the wood-plastic composite material block is conveyed to a station to be fed through the conveyor belt, and the insulation box ensures that the wood-plastic composite material block keeps constant and consistent temperature in the conveying process.
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| CN201711314456.5A CN108000853B (en) | 2017-12-12 | 2017-12-12 | Compression molding pre-paving method and system for wood-plastic composite product |
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| CN201711314456.5A CN108000853B (en) | 2017-12-12 | 2017-12-12 | Compression molding pre-paving method and system for wood-plastic composite product |
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| CN108000853A CN108000853A (en) | 2018-05-08 |
| CN108000853B true CN108000853B (en) | 2023-09-26 |
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