CN211848616U - Equipment for preparing fine yellow pulp product formed by paper-plastic molding - Google Patents
Equipment for preparing fine yellow pulp product formed by paper-plastic molding Download PDFInfo
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- CN211848616U CN211848616U CN201922454402.XU CN201922454402U CN211848616U CN 211848616 U CN211848616 U CN 211848616U CN 201922454402 U CN201922454402 U CN 201922454402U CN 211848616 U CN211848616 U CN 211848616U
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Abstract
The utility model discloses an equipment of shaping fine work yellow thick liquid product is moulded to preparation paper, mould, hot pressing lower mould and burden draft forming die on inhaling thick liquid mould, extrusion die, hot pressing, the yellow thick liquid product environmental protection that makes through above-mentioned equipment easily degrades, and tensile strength is high, and simultaneously, the product that makes through equipment does not return and contracts. Reduce serious deformation when the anchor clamps help the product to dry through preapring for an unfavorable turn of events shape, improve the product quality after the stoving.
Description
Technical Field
The utility model relates to a paper pulp molding field, concretely relates to equipment of shaping fine work yellow thick liquid product is moulded to preparation paper.
Background
In recent years, as the demand of products in the manufacturing industry, particularly outer packaging manufactured products, is increasing, the immaturity of the manufacturing process also brings corresponding environmental problems, and people have stronger environmental protection consciousness, so that technicians have intensive research on manufacturing renewable resources. The paper pulp of the existing paper pulp molding products is mainly divided into two types, namely yellow pulp, which has lower cost and low product requirement and is mainly used in domestic low-end fast-selling product markets, such as packaging trays for eggs, shoes, red wine and the like; the first is white paste, mainly used in international electronic consumer high-end markets, such as iphone, pad and the like, and the product is high in requirement and high in cost. However, for consumer market packaging trays for medium-end electronics, cosmetics and the like, the product requirement is high, if common yellow pulp is adopted, the quality is too low, and if white pulp is adopted, the cost is too high. Therefore, it is necessary to develop a suitable middle-end pulp with high product quality and relatively low cost.
The bamboo fiber as a fast-growing and high-yield plant has the advantages of high survival rate of planting, short growth period, stronger wear resistance and hygroscopicity, stronger strength than cotton fiber and viscose fiber and wide application prospect, but has super-strong instant hygroscopicity compared with other raw materials or renewable resources, and needs higher requirements on waterproofness to a certain extent. On the other hand, in order to improve the water resistance and the oil resistance of the existing paper pulp molding product, a corresponding water-proofing agent and an oil-proofing agent are added, and in the natural degradation process of the prepared product, because the water-proofing agent is characterized by weak cationic property, the water-proofing agent is added into the paper pulp and is attached to the surface of the fiber due to electrostatic adsorption to form a film on the surface of the fiber, so that the connection between the fiber and the fiber is tighter, the breakage of a cellulose macromolecular chain is inhibited to a certain extent, the tensile strength of the paper pulp molding product is improved along with the imposition of the dosage of the water-proofing agent, the quality of the paper pulp molding product is slowly reduced in a natural. Sugarcane is a fibrous raw material of a stem-shaped plant growing all year round, and the fibrous structure of the sugarcane comprises a crystalline region and an amorphous region, while the prior art uses the sugarcane to prepare a molded product which is rough and difficult to degrade. Therefore, the utility model discloses develop a production facility of shaping fine work yellow thick liquid goods is moulded to paper.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model is to overcome the defect among the prior art, provide a production facility of pulp moulded product that easily degrades, have stronger tensile properties.
The utility model provides a preparation paper is moulded equipment of shaping fine work yellow thick liquid product, include:
the pulp suction mould absorbs yellow pulp from the pulp tank to form a wet blank;
the extrusion die is arranged above the pulp suction die correspondingly, and the pulp suction die and the extrusion die perform primary extrusion on the wet blank after the wet blank is driven to rotate upwards by the pulp suction die;
the hot-pressing upper die can move up and down along the vertical direction;
the hot pressing lower die can move left and right along the horizontal direction, and when the hot pressing lower die moves to vertically correspond to the hot pressing lower die, hot pressing treatment is carried out on the wet blank; a gas suction device is arranged in the hot-pressing upper die, and a gas blowing device is arranged in the hot-pressing lower die;
the negative drawing forming die comprises an upper die part and a corresponding lower die part, wherein the opposite surfaces of the upper die part and the lower die part are correspondingly provided with a groove structure and a protruding structure, so that the upper die part and the lower die part are matched to extrude a pulp molding product to form a back-off structure.
Optionally, the upper die part comprises an upper die plate and a female die insert arranged on the upper die plate; the lower die part comprises a lower die plate and a suspension structure which is fixedly arranged on the lower die plate and used for placing molded pulp molded products, and the upper surface of the suspension structure is provided with a top block corresponding to the concave die insert; the suspension structure comprises a fixing unit block and a protruding unit block integrated with the fixing unit block, and the top block is arranged on the upper surface of the protruding unit block.
Optionally, the outer surface of the top block is coated with a silica gel layer, the silica gel layer is 1.0 mm-2.0mm, and the hardness of the silica gel layer is 42-48 degrees.
Optionally, the hot pressing fixture comprises an anti-deformation fixture which is matched with the product before hot pressing.
The utility model discloses technical scheme has following advantage:
the utility model discloses production facility of pulp moulding product reduces serious deformation when anchor clamps help the product to dry through preapring for an unfavorable turn of events shape, improves the product quality after drying.
In addition, the stress-strain curves of the molded product made of the single bamboo fiber pulp and the molded product made of the single sugarcane fiber pulp are not dispersed through tests, the stress-strain curves of the products made of the bamboo and the sugarcane fibers have strong consistency according to the stress of the materials, and after the sugarcane pulp is added, when the stress value of the materials is greatly improved, the yield strength of the materials with cracks or fractures is the largest. The tensile modulus of the bamboo-sugarcane pulp can be improved by adding a certain amount of chitosan into the bamboo-sugarcane pulp.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a device for preparing a fine yellow pulp product formed by paper-plastic molding according to the invention;
FIG. 2 is a schematic structural view of an upper mold portion of the overmolding apparatus of FIG. 1;
FIG. 3 is a schematic view of the lower mold portion of the overmolding apparatus of FIG. 1;
FIG. 4 is a graphical representation of a detected stress-strain curve of an article obtained using the method of example 3;
FIG. 5 is a graphical representation of a stress-strain curve for a test of an article obtained using the method of comparative example 4;
FIG. 6 is a graphical representation of a stress-strain curve for a test of an article obtained using the method of comparative example 5.
Detailed Description
Example 1
The embodiment provides a production device of a yellow pulp molded product, which is shown in figure 1 and comprises: the pulp sucking mould 1 sucks pulp from the pulp tank to form a wet blank; the extrusion die 2 is arranged above the pulp suction die 1 correspondingly, and after the pulp suction die 1 rotates upwards with the wet blank, the wet blank is subjected to primary extrusion with the extrusion die 2; the hot-pressing upper die 3 can move up and down along the vertical direction; the hot-pressing lower die 4 can move left and right along the horizontal direction, and when the hot-pressing lower die 4 moves to vertically correspond to the hot-pressing lower die, hot-pressing treatment is carried out on the wet blank; a suction device is arranged in the hot-pressing upper die 3, and a blowing device is arranged in the hot-pressing lower die 4; a hot-pressing lower die 4 and a transfer die 5 arranged on the downstream side of the hot-pressing lower die 4 are fixed on the horizontal sliding plate, and the lower part of the transfer die is provided with an air blowing structure for blowing a product on a workbench 6; manually transferring the one-step formed product to a suspension structure of the negative drawing structure 7, pressing the product by the pressing structure, and moving the upper die part downwards to form the two-step formed product with the inverted buckle structure. Specifically, after the slurry suction mold 1 sucks slurry from a slurry pool, the slurry suction mold is turned over, the slurry suction mold 1 extrudes the slurry with an extrusion mold 2 arranged on the slurry suction mold, the slurry suction mold 1 overturns again after extrusion, at the moment, a hot pressing lower mold 3 moves leftwards to the lower part of the slurry suction mold 1, a wet blank is placed in the hot pressing lower mold 4 by the slurry suction mold 1, at the moment, a station 1 is formed, the hot pressing lower mold 4 moves rightwards to a position corresponding to the hot pressing upper mold 3 to form the station 2, at the moment, the hot pressing upper mold 3 moves downwards vertically to extrude the wet blank with the hot pressing lower mold 4 and heat and shape the wet blank, as a suction device is arranged in the hot pressing upper mold 3, and a blowing device is arranged in the hot pressing lower mold 4, therefore, a molded product formed at the position is on the hot pressing upper mold 3, then the hot pressing lower mold 4 and an unloading clamp move, and the right side moves back to the station 2, the system reduces the forming movement time of the equipment and improves the cycle period of the equipment by more than 20 s. And then transferring the primary molded product to negative die drawing equipment for secondary molding for 3 s.
Referring to fig. 2 and 3, the upper mold part 70 includes an upper mold plate 702 and a female mold insert 701 disposed on the upper mold plate 702, wherein the upper mold plate is provided with a plurality of limiting columns 703 at 4 outer corners, and a spring is sleeved on the limiting columns near the upper mold plate; the lower die part 80 comprises a lower die plate 804 and a suspension structure fixedly arranged on the lower die plate 804 and used for placing molded pulp molded products, wherein the upper surface of the suspension structure is provided with a top block 801 corresponding to the concave die insert, the suspension structure in the embodiment comprises a fixed unit block 802 and a protruding unit block 805 integrated with the fixed unit block, the top block 801 is arranged on the upper surface of the protruding unit block 805, a limiting groove is arranged at the position of the lower die plate corresponding to the limiting column of the upper die plate, and when the upper die part is driven by an oil pressure mechanism to move downwards and is combined and fastened with the lower die part, the limiting column 703 extends into the limiting groove 803 and provides certain buffering through a spring. The silica gel layer is coated on the outer surface of the top block 801, the silica gel layer is 1.0 mm-2.0mm, the hardness of the silica gel layer is 48-52 degrees, and it should be noted that the thickness of the product of the present invention, or the thickness of the molded product in the field, is generally 0.6mm-2.0mm, and therefore the silica gel layer can be applied within the thickness range of the product.
Example 2
The process for forming the fine yellow pulp product by paper-plastic molding comprises the following steps:
s1, cooking raw bamboo in boiling water for 5 hours, pulping, concentrating and grinding to obtain bamboo fibers, selecting 200-400-mesh bamboo fibers, adding water with the weight 3 times that of the bamboo fibers, and stirring to obtain bamboo fiber slurry;
s2, soaking the primary bagasse pulp in an alkaline aqueous solution for 24 hours, pulping, concentrating to 10%, grinding to obtain sugarcane fibers, selecting 200-mesh 400-mesh sugarcane fibers, adding water with the weight 2 times that of the sugarcane fibers, and stirring to obtain slurry;
s3, taking 80 parts of the prepared bamboo fiber pulp, 50 parts of the prepared sugarcane fiber pulp, adding 40 parts of an adhesive, 5 parts of sodium alginate, 5 parts of chitosan, 1 part of a waterproof agent and 3 parts of an anionic emulsifier, and uniformly mixing;
in this embodiment, the binder is selected from water, carboxymethyl cellulose, and starch according to a ratio of 1: 1: 2, mixing the components in parts by weight; the waterproof agent is selected from acrylate copolymer, anionic emulsifiers of dimethylolpropionic acid and dimethylolbutyric acid 1: 1 and mixing.
S4, a pulp suction mold is stretched into the formed bamboo-sugarcane fiber mixture suspension, the vacuum negative pressure is 0.04Mpa, the pulp suction mold 1 sucks pulp from a pulp pool, turns over, extrudes with an extrusion mold 2 arranged on the pulp suction mold, turns over again after extrusion, at the moment, a hot pressing lower mold 3 moves leftwards to the lower side of the pulp suction mold 1, the pulp suction mold 1 places a wet blank in a hot pressing lower mold 4, at the moment, a station 1 is formed, the hot pressing lower mold 4 moves rightwards to a position corresponding to the hot pressing upper mold 3, a station 2 is formed, at the moment, the hot pressing upper mold 3 moves vertically downwards, the wet blank is extruded with the hot pressing lower mold 4 and is heated and shaped, as a suction device is arranged in the hot pressing upper mold 3, an air blowing device is arranged in the hot pressing lower mold 4, then the hot pressing lower mold 4 moves leftwards together with an unloading clamp, returns to the station 1, at the moment, the hot pressing upper mold 3 corresponds to, and the hot-pressing upper die 3 places the formed molded product into the transfer die 5, moves back to the station 2 from the right side, and then transfers the primary molded product to negative die drawing equipment for secondary molding for 3 seconds. Wherein, the hot-pressing forming machine is used for drying and forming at the temperature of 130-150 ℃.
Test examples
Performance testing
1. Degradation degree related test index
The experimental study is carried out by using a soil burying method and a natural climate exposure method, each example or a comparison example is repeated for 20-30 times, and then the three indexes of the crystallinity, the tensile strength and the weight loss rate are selected for measurement, and the crystallinity is measured by 4.1: the crystallinity was measured by the X-ray rotational crystal method using a Rigaku D/max-1200X-ray diffractometer in Japan,
the measurement conditions were: the method comprises the following steps of Cu target, Kalpha ray, monochromatic filtering, 40kV, 300mA, step diameter scanning, 3 seconds per step, step width of 0.10 degree and scanning range of 20.6-40 degrees. The calculation formula is as follows:
crystallinity CrI (%) ═ FK/(FK + FA) ] × 100
Wherein: FK is crystalline region area (m 2); FA is the area of the amorphous region (m2)
The test result shows that: the crystallinity (%) of the samples of examples 1 and 2 after 8 weeks was about 60%, and the crystallinity (%) of the samples after 16 weeks was about 55%; it is shown that the cellulose of examples 1 and 1 has a large variation in crystallinity and degrades more rapidly, while the crystalline region of the comparative example has a compact structure and degrades very slowly.
2. Mechanical Property test
A material load-displacement curve can be obtained through a tensile experiment, and load and displacement data obtained through the tensile experiment are converted into stress-strain sigma-data by using formulas (1) and (2). And processing the material data using origin software.
Wherein: f is tensile load, N; a is the cross-sectional area of the sample, m 2; l is the deformation length mm of the sample; and L is the gauge length of the sample. The stress-strain sigma-curve of the pulp molding material is drawn by origin software, and different pulp molding sample stress-strain sigma-curves are drawn, and fig. 3-6 are diagrams made according to white pulp, common yellow pulp and the yellow pulp of the patent. From the stress-strain curve, the material goes through three processes during the stretching process: the method comprises an elastic stage, a viscoplasticity stage and a fracture stage, wherein when the stress borne by a material is less than a yield limit sigma s, the material stress sigma and strain form a proportional relation to meet Hooke's law, and the elastic stage is the elastic stage of the material; when the stress on the material continues to increase beyond the yield limit σ s, the material enters the viscoplastic phase. In the stage, the increase of the material stress sigma is reduced as the material strain increases compared with the previous stage, and the material stress sigma and the strain form a nonlinear relation; as the material stress σ continues to increase, the material begins to crack when the stress σ value reaches σ y and enters a failure fracture stage. If the stress sigma continues to increase, the material will break. From the raw bamboo pulp material, the elastic stage and the viscoplasticity stage are relatively short, the elastic stage and the viscoplasticity stage of the sugarcane are relatively long, and the breakage stage of the bamboo-sugarcane pulp material (yellow pulp of the patent) occurs at a later point, so that the bamboo-sugarcane pulp material has stronger tensile resistance.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (4)
1. The equipment for preparing the fine yellow pulp product formed by paper-plastic molding is characterized by comprising the following components:
the pulp suction mould absorbs yellow pulp from the pulp tank to form a wet blank;
the extrusion die is arranged above the pulp suction die correspondingly, and the pulp suction die and the extrusion die perform primary extrusion on the wet blank after the wet blank is driven to rotate upwards by the pulp suction die;
the hot-pressing upper die can move up and down along the vertical direction;
the hot pressing lower die can move left and right along the horizontal direction, and when the hot pressing lower die moves to vertically correspond to the hot pressing lower die, hot pressing treatment is carried out on the wet blank; a gas suction device is arranged in the hot-pressing upper die, and a gas blowing device is arranged in the hot-pressing lower die;
the negative drawing forming die comprises an upper die part and a corresponding lower die part, wherein the opposite surfaces of the upper die part and the lower die part are correspondingly provided with a groove structure and a protruding structure, so that the upper die part and the lower die part are matched to extrude a pulp molding product to form a back-off structure.
2. The apparatus for preparing fine yellow pulp products by paper-plastic molding according to claim 1, wherein the upper mold part comprises an upper mold plate and a female mold insert arranged on the upper mold plate; the lower die part comprises a lower die plate and a suspension structure which is fixedly arranged on the lower die plate and used for placing molded pulp molded products, and the upper surface of the suspension structure is provided with a top block corresponding to the concave die insert; the suspension structure comprises a fixing unit block and a protruding unit block integrated with the fixing unit block, and the top block is arranged on the upper surface of the protruding unit block.
3. The apparatus for preparing fine yellow pulp products by paper-plastic molding according to claim 2, wherein the outer surface of the top block is coated with a silica gel layer, the silica gel layer is 1.0 mm-2.0mm, and the hardness of the silica gel layer is 42-48 degrees.
4. The apparatus for preparing fine yellow pulp products by paper-plastic molding according to any one of claims 1 to 3, further comprising a deformation preventing jig which is provided corresponding to the products before hot pressing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922454402.XU CN211848616U (en) | 2019-12-30 | 2019-12-30 | Equipment for preparing fine yellow pulp product formed by paper-plastic molding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041886A (en) * | 2019-12-30 | 2020-04-21 | 永发（河南）模塑科技发展有限公司 | Process and equipment for preparing fine yellow pulp product formed by paper and plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041886A (en) * | 2019-12-30 | 2020-04-21 | 永发（河南）模塑科技发展有限公司 | Process and equipment for preparing fine yellow pulp product formed by paper and plastic |
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