CN111593613B - Plastic suction mold of paper-plastic integral bottle and plastic suction process thereof - Google Patents
Plastic suction mold of paper-plastic integral bottle and plastic suction process thereof Download PDFInfo
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- CN111593613B CN111593613B CN202010415315.8A CN202010415315A CN111593613B CN 111593613 B CN111593613 B CN 111593613B CN 202010415315 A CN202010415315 A CN 202010415315A CN 111593613 B CN111593613 B CN 111593613B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
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Abstract
The invention relates to a pulp suction mould of a pulp molding integral bottle and a pulp suction process thereof. The slurry suction mould comprises a grouting template, a grouting cavity and a slurry suction template, and grouting is performed on the position of the bottle cavity through the grouting cavity and the grouting holes of the extension part, wherein the grouting can be slurry spraying, grouting, stirring and slurry suction in the bottle or slurry throwing by a roller. And the pulp suction cavity is vacuumized to ensure that the paper pulp is uniformly adsorbed on the surface of the pulp suction mould to form a wet bottle blank after pulp suction.
Description
Technical Field
The invention relates to the technical field of forming of paper-plastic forming products, in particular to development of a grouting and pulp sucking mould of a paper-plastic integral bottle.
Background
The existing technology of paper-plastic bottle products adopts two half-side bottles to be formed and then is bonded by glue or adopts a paper tube to bond a bottle opening and a bottle bottom, and the technology comprises the steps of forming, gluing, pressing and cutting excess edges, for example, patent CN201320746431 discloses a paper-plastic bottle body which comprises a bottle body and a plastic end arranged at the upper part of the bottle body, wherein the bottle body is a paper tube with an upward opening, and the lower edge of the plastic end is tightly connected with the opening of the paper tube to seal the inner cavity of the paper tube; patent CN 201420833805 discloses a stock solution bottle with go-between, including the paper bottle, the inside of paper bottle is provided with the inner bag that is used for storing liquid, and the paper bottle includes half first cavity and the half second cavity of relative setting, and half first cavity and the half butt joint of second cavity form and are used for holding the inner chamber of inner bag is through go-between fixed connection between. The process flow is long, the process is complex, the cost is high, and the gluing is not easy to decompose, so that the environmental protection performance is poor. In order to reduce the cost of the paper-plastic bottle, improve the environmental protection and meet the environmental protection requirement, the invention designs an integral paper-plastic bottle forming process. The integral paper-plastic bottle forming process only has two steps of forming and cutting waste materials, reduces processes such as gluing and pressing, greatly improves the environmental protection performance of products, reduces the cost of paper-plastic bottles, and is convenient for large-batch popularization.
Disclosure of Invention
In order to solve the above problems, the present invention develops the application of the elastomer material resistant to high temperature and high pressure to the design of the paper-plastic mold. The novel in-bottle grouting process is adopted to solve the problem of the pulp suction process of the bottle, and the paper-plastic mold adopts the mold integral design made of a new elastomer and comprises an extrusion mold and a hot-pressing upper mold.
The invention specifically adopts the following technical scheme:
a pulp suction mould for a paper-plastic integral bottle comprises a grouting template, a grouting cavity and a pulp suction template, wherein the pulp suction template is provided with a concave cavity consistent with the appearance of the bottle, and is positioned above the concave cavity and connected with the grouting cavity; the grouting cavity is provided with an extension part, a grouting pipe hole is formed in the extension part, the extension part extends into a concave cavity of the slurry suction template, and a bottle wet blank is formed preliminarily through grouting of the grouting pipe hole; the slurry suction template is provided with a slurry suction hole and a slurry suction cavity, the slurry suction hole is formed in the surface of the concave cavity and is connected with the slurry suction cavity, the slurry suction cavity is connected with a vacuum device, and a bottle wet blank formed preliminarily by grouting is formed into a wet blank after slurry suction through vacuumizing.
Further, the grouting cavity is connected with a paper pulp pool, and the paper pulp can be selected from sugarcane pulp, bamboo pulp, wood pulp and the like.
Furthermore, the extension part is evenly provided with grouting pipe holes, and grouting can be guniting, grouting, stirring in a bottle and slurry suction or roller slurry throwing.
And further, a pulp supplementing device is also arranged, and if a part with uneven pulp exists in the wet blank of the bottle preliminarily formed by grouting through the grouting pipe hole, pulp is supplemented through the pulp supplementing device.
Specifically, the grouting template and the slurry suction template form a bottle cavity, and the slurry suction template consists of slurry suction half templates.
Further specifically, the pulp suction holes on the surface of the concave cavity respectively correspond to the bottle mouth, the bottle neck, the bottle body and the bottle bottom of the bottle cavity, and the density of the pulp suction holes on the bottle mouth, the bottle neck and the bottle body is greater than that of the pulp suction holes on the bottle bottom.
A pulp suction process of a paper-plastic integral bottle uses the pulp suction mold and comprises the following steps:
(1) assembling the slurry suction mold to enable the slurry suction mold to be in a mold closing state, and spraying slurry to the position of the bottle cavity through the grouting cavity and the grouting holes of the extension part to enable slurry in the bottle cavity to be sufficient and uniform;
(2) and starting the vacuum equipment, and vacuumizing the pulp suction cavity to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank after pulp suction.
A mould for paper-plastic integral bottles comprises the pulp suction mould, an extrusion mould and a hot-pressing forming mould. The slurry suction mould is used for grouting to preliminarily form a wet bottle blank, and the wet bottle blank preliminarily formed by grouting is formed into a wet blank after slurry suction through vacuumizing; the extrusion die is used for forming a preformed paper bottle by extruding the elastomer bag; the hot-press forming die is used for forming the integral paper bottle through extrusion of the elastomer bag.
The extrusion die consists of an extrusion die, a pressurizing cavity, an elastomer bag, a pulp sucking die and a wet blank after pulp sucking. The pressurizing cavity is arranged in the extruding die and connected with the elastomer bag, the extruding die is arranged above the pulp sucking die and forms a bottle cavity with the pulp sucking die, the wet blank after pulp sucking is arranged in the bottle cavity, the elastomer bag extends into the wet blank arranged in the bottle cavity, and after die assembly, the elastomer bag pressurizes, expands and extrudes the wet blank to be attached to the inner wall of the bottle cavity to form the preformed paper bottle.
Furthermore, the elastomer bag is pressurized by filling high-pressure gas, water pressure or oil pressure and the like, so that the pressure of the inner cavity of the wet blank after slurry absorption plays roles in drainage and preforming.
Specifically, the extrusion die and the pulp suction die form a bottle cavity, and the pulp suction die consists of pulp suction half dies.
The hot-pressing forming die consists of a hot-pressing upper die, a pressurizing cavity, an elastomer bag, a hot-pressing lower die and a preformed paper bottle. The pressurizing cavity is arranged in the hot-pressing upper die and is connected with the elastomer bag, the hot-pressing upper die is arranged above the hot-pressing lower die and forms a bottle cavity with the hot-pressing lower die, the preformed paper bottle is arranged in the bottle cavity, the elastomer bag extends into the preformed paper bottle arranged in the bottle cavity, and after die assembly is carried out, the elastomer bag pressurizes, expands and extrudes the preformed paper bottle to be attached to the inner wall of the bottle cavity to form the integral paper bottle.
Furthermore, the elastomer bag is pressurized by filling high-pressure gas, water pressure or oil pressure and the like, so that the pressure of the inner cavity of the preforming paper bottle plays the roles of drainage and forming, and the paper blank is ensured to be formed.
Specifically, the hot-pressing upper die and the hot-pressing lower die form a bottle cavity, and the hot-pressing lower die consists of a bottle body part and a bottle bottom part.
The hot pressing lower die is made of a breathable material and can be polished, and water vapor at high temperature is quickly exhausted to quickly dry the product. The hot pressing mold is made of permeable steel, and the micro holes made of the permeable steel can absorb water vapor to achieve the purpose of rapid exhaust.
The elastomer bag is made of high-pressure-resistant and high-temperature-resistant materials. The elastomeric bags in the extrusion die and the hot-press forming die may be the same or different.
The hot-pressing forming die is also provided with a hot-pressing device for heating and pressing the die.
The process for molding the integral bottle by using the mold comprises the following steps:
(1) assembling the slurry suction mold to enable the slurry suction mold to be in a mold closing state, and spraying slurry to the position of the bottle cavity through the grouting cavity and the grouting holes of the extension part to enable slurry in the bottle cavity to be sufficient and uniform; the grouting can be guniting, grouting, stirring and slurry sucking in a bottle or slurry throwing by a roller.
If the slurry is not uniform, the slurry is supplemented through a slurry supplementing device;
(2) starting the vacuum equipment, and vacuumizing the pulp suction cavity to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank after pulp suction;
the specific vacuum pumping controls the water content of the wet embryo to be about 70-80% and the thickness to be about 2.5 mm.
(3) Transferring the wet blank after slurry absorption to an extrusion die, placing the wet blank after slurry absorption in a bottle cavity, extending an elastomer bag into the wet blank placed in the bottle cavity, closing the die, and pressurizing and expanding the elastomer bag to extrude the wet blank to be attached to the inner wall of the bottle cavity to form a preformed paper bottle; after the molding is finished, discharging the pressurized gas or liquid and taking out the elastomer bag;
the pressure of the elastomer bag is controlled to be 1 kilogram force, so that the water content of the preformed paper bottle is 40% -50%, and the thickness is 1.5 mm.
The elastomeric bag can apply different pressures according to different requirements of the product.
(4) The preformed paper bottle is transferred to a hot-pressing forming die, the preformed paper bottle is arranged in a bottle cavity, the elastomer bag extends into the preformed paper bottle arranged in the bottle cavity, after die assembly, the elastomer bag is pressurized, expanded and extruded to be pasted on the inner wall of the bottle cavity, and hot-pressing forming is carried out to form the integral paper bottle.
The product has different thickness and water content, such as 3-5% of water content and 1.0mm of thickness. And after the molding is finished, discharging the pressurized gas or liquid and taking out the elastomer bag.
The hot-pressing forming die is heated to 150 ℃ through the hot-pressing die, the pressurization of the elastomer bag is about 5 kilograms of force, and the hot-pressing forming die can be adjusted according to the requirements of products.
Drawings
FIG. 1 is a schematic structural view of a grouting mold of the present invention;
FIG. 1a is a schematic structural diagram of the slip casting mold according to the present invention in an open state;
FIG. 1b is a schematic structural diagram of the grouting mold in a mold closing state according to the invention;
FIG. 2 is a schematic view of the pulp suction mold of the present invention;
FIG. 2a is a schematic structural view of the pulp sucking mold in an open state;
FIG. 2b is a schematic structural view of the slurry suction mold of the present invention in a mold clamping state;
FIG. 3 is a schematic structural view of a hot press molding die of the present invention;
FIG. 3a is a schematic structural view of the hot press forming mold of the present invention in an open state;
fig. 3b is a schematic structural view of the hot press mold according to the present invention in a mold clamping state.
Description of reference numerals:
1. grouting a template; 2. grouting a cavity; 21. an extension portion; 3. grouting pipe holes; 4. a pulp suction template; 5. a pulp sucking hole; 6. a pulp sucking cavity; 7. wet embryos after pulp absorption; 8. extruding the die; 81. performing paper bottles in advance; 9. a pressurizing cavity; 10. an elastomeric bag; 11. a pulp sucking mould; 12. hot-pressing the upper die; 13. hot-pressing the lower die; 91. a pressurizing cavity; 92. a body portion; 93. a bottle bottom portion; 14. an elastomeric bag; 15. integral paper bottle
Detailed Description
The invention will be further described with reference to fig. 1a-3 b.
Example 1
The invention is described with reference to the accompanying drawings 1a and 1b, wherein the grouting system is in a mold opening and closing state, the parts marked 1-5 are combined to form the structural design of a mold of the grouting system, the concrete slurry suction system comprises a grouting template 1, a grouting cavity 2 and a slurry suction template 4, the slurry suction template 4 is provided with a concave cavity consistent with the appearance of a bottle, the grouting template 1 is positioned above the concave cavity, the grouting template 1 and the slurry suction template 4 form a bottle cavity, the slurry suction template 4 is composed of slurry suction half templates, and the grouting template 1 is connected with the grouting cavity 2; the grouting cavity is provided with an extension part 21, a grouting pipe hole 3 is formed in the extension part 21, the extension part 21 extends into a concave cavity of the grouting template 4, and a bottle wet blank 7 is formed preliminarily through grouting of the grouting pipe hole 3; the pulp suction template is provided with a pulp suction hole 5 and a pulp suction cavity 6, the pulp suction hole 5 is arranged on the surface of the concave cavity and is connected with the pulp suction cavity 6, the pulp suction hole 5 on the surface of the concave cavity respectively corresponds to a bottle opening, a bottle neck, a bottle body and a bottle bottom of the bottle cavity, the density of the pulp suction holes on the bottle opening, the bottle neck and the bottle body is greater than that of the pulp suction holes on the bottle bottom, the pulp suction cavity 6 is connected with a vacuum device (not shown), under a mold closing state, pulp is sprayed to the part of the bottle cavity through the grouting cavity 2 and the grouting holes 3 of the extension part 21, the pulp is cane pulp, and the pulp in the bottle cavity is sufficient and uniform; starting a vacuum device (not shown), vacuumizing the pulp suction cavity 6 to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank 7 after pulp suction, controlling the vacuumizing to be about 0.7Mpa through an electromagnetic valve and a pressure gauge, and controlling the water content of the wet blank to be about 70-80% and the thickness to be 2.5 mm.
Fig. 2a and 2b show the structure of the slurry suction system in the open and closed states. The extrusion system consists of an extrusion die 8, a pressurizing cavity 9, an elastic body air bag 10, a pulp suction die 11 and a wet blank 7 after pulp suction. The pressurizing cavity 9 is arranged in the extruding die 8 and connected with the elastomer air bag 10, the extruding die 8 is arranged above the pulp absorbing die 11 and forms a bottle cavity with the pulp absorbing die 11, the wet blank 7 after pulp absorption is arranged in the bottle cavity, the elastomer air bag 10 extends into the wet blank arranged in the bottle cavity, and after die assembly, the elastomer bag pressurizes, expands and extrudes the wet blank to be attached to the inner wall of the bottle cavity to form the preformed paper bottle 81. The elastic body bag 10 is an elastic body which can be stretched and contracted, and is formed by pressurizing a mold by inflation, and after the formation is finished, the elastic body bag 10 is taken out by exhausting gas. The elastomer is pressurized in a 'die assembly' state, then the wet blank 7 for absorbing the pulp is preformed, the pressure of the air bag of the elastomer is controlled to be 1 kilogram force, the water content of the preformed paper bottle is 40% -50%, and the thickness of the preformed paper bottle is 1.5 mm.
Referring to fig. 3a and 3b, which show the structural schematic diagram of the hot press molding system of the present invention in the open and closed states, the upper hot press mold 12 is composed of the elastomer air bag 14 resistant to high temperature and high pressure, and the lower hot press mold 13 is composed of 2 mold body portions 92 and a bottle bottom portion 93, and the hot press molding system is composed of the upper hot press mold 12, a pressurizing chamber 91, the elastomer air bag 14, the lower hot press mold 13 and a preformed paper bottle 81. The pressurization cavity 91 is arranged in the hot-pressing upper die 12 and is connected with the elastomer air bag 14, the hot-pressing upper die 12 is arranged above the hot-pressing lower die 13 and forms a bottle cavity with the hot-pressing lower die 13, the preformed paper bottle 81 is arranged in the bottle cavity, the elastomer air bag 14 extends into the preformed paper bottle arranged in the bottle cavity, the hot-pressing upper die 12 and the hot-pressing lower die 13 are provided with exhaust grooves, after die assembly, the integral paper-plastic bottle 15 is integrally formed by inflating and pressing the hot-pressing upper die 12 through elastomer deformation under the condition of die assembly, the heating is carried out to 150 ℃ through a hot-pressing die, the pressurization of the elastomer bag is about 5 kilograms, and redundant moisture is discharged through the exhaust grooves, so that the moisture content of the finished integral paper-plastic bottle 15 is 3% -5%, the thickness is about 1.0mm, and the exhaust gas is discharged after the forming is finished to take out the elastomer air bag 14.
Example 2
The structural schematic diagram of the grouting system in the state of die opening and die closing is described according to the attached drawings 1a and 1b, the part marked with 1-5 is the structural design of a die combined to form the grouting system, the concrete slurry suction system comprises a grouting template 1, a grouting cavity 2 and a slurry suction template 4, the slurry suction template 4 is provided with a concave cavity consistent with the appearance of a bottle, the grouting template 1 is positioned above the concave cavity, the grouting template 1 and the slurry suction template 4 form a bottle cavity, the slurry suction template 4 consists of slurry suction half templates, and the grouting template 1 is connected with the grouting cavity 2; the grouting cavity is provided with an extension part 21, a grouting pipe hole 3 is formed in the extension part 21, the extension part 21 extends into a concave cavity of the grout suction template 4, and grouting is performed through the grouting pipe hole 3 to initially form a bottle wet blank 7; the pulp suction template is provided with a pulp suction hole 5 and a pulp suction cavity 6, the pulp suction hole 5 is arranged on the surface of the concave cavity and is connected with the pulp suction cavity 6, the pulp suction hole 5 on the surface of the concave cavity respectively corresponds to a bottle mouth, a bottle neck, a bottle body and a bottle bottom of the bottle cavity, the density of the pulp suction holes on the bottle mouth, the bottle neck and the bottle body is greater than that of the pulp suction holes on the bottle bottom, the pulp suction cavity 6 is connected with a vacuum device (not shown), the parts of the bottle cavity are grouted through the grouting cavity 2 and the grouting holes 3 of the extension part 21 in a mold closing state, the pulp is bamboo pulp, pressure is applied to enable the bamboo pulp to be grouted into the corresponding parts of the bottle cavity, and the pulp in the bottle cavity is sufficient and uniform; starting a vacuum device (not shown), vacuumizing the pulp suction cavity 6 to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank 7 after pulp suction, controlling the vacuumizing to be about 0.7Mpa through an electromagnetic valve and a pressure gauge, and controlling the water content of the wet blank to be about 70-80% and the thickness to be 2.5 mm.
According to the figures 2a and 2b, the structure of the slurry suction system in the open and closed states is shown. The extrusion system consists of an extrusion die 8, a pressurizing cavity 9, an elastic body air bag 10, a pulp suction die 11 and a wet blank 7 after pulp suction. The pressurizing cavity 9 is arranged in the extruding die 8 and connected with the elastomer air bag 10, the extruding die 8 is arranged above the pulp absorbing die 11 and forms a bottle cavity with the pulp absorbing die 11, the wet blank 7 after pulp absorption is arranged in the bottle cavity, the elastomer air bag 10 extends into the wet blank arranged in the bottle cavity, and after die assembly, the elastomer bag pressurizes, expands and extrudes the wet blank to be attached to the inner wall of the bottle cavity to form the preformed paper bottle 81. The elastic body bag 10 is an elastic body which can be stretched and contracted, and is formed by pressurizing a mold by inflation, and after the formation is finished, the elastic body bag 10 is taken out by exhausting gas. The wet blank 7 absorbing the pulp is preformed after the elastic body is pressurized in a 'die assembly' state, the pressure of the elastic body air bag is controlled to be 1 kilogram force, the water content of the preformed paper bottle is 40% -50%, and the thickness of the preformed paper bottle is 1.5 mm.
Referring to fig. 3a and 3b, which show the structural schematic diagram of the hot press molding system of the present invention in the open and closed states, the upper hot press mold 12 is composed of the elastomer air bag 14 resistant to high temperature and high pressure, and the lower hot press mold 13 is composed of 2 mold body portions 92 and a bottle bottom portion 93, and the hot press molding system is composed of the upper hot press mold 12, a pressurizing chamber 91, the elastomer air bag 14, the lower hot press mold 13 and a preformed paper bottle 81. The pressurizing cavity 91 is arranged in the hot-pressing upper die 12 and is connected with the elastomer air bag 14, the hot-pressing upper die 12 is arranged above the hot-pressing lower die 13, forming a bottle cavity with the hot-pressing lower die 13, placing the preformed paper bottle 81 in the bottle cavity, extending the elastomer air bag 14 into the preformed paper bottle placed in the bottle cavity, making the hot-pressing upper die 12 and the hot-pressing lower die 13 of breathable steel, the micro-holes with the diameter of 0.1-0.01mm are arranged on the upper die, after the die is closed, the upper die 12 of the hot press is inflated under the condition that the die is closed, the integral paper-plastic bottle 15 is integrally formed on the paper bottle through the deformation of the elastic body, the plastic bottle is heated to 150 ℃ by a hot-pressing die, the elastomer bag is pressurized to about 5 kilograms of force, redundant moisture is discharged through the micropores of the air-permeable steel, the moisture content of the finished product integral paper-plastic bottle 15 is 3-5%, the thickness is about 1.0mm, and the elastomer air bag 14 is taken out after the forming is finished and the gas is discharged.
Example 3
The structural schematic diagram of the grouting system in the state of die opening and die closing is described according to the attached drawings 1a and 1b, the part marked with 1-5 is the structural design of a die which is combined to form the grouting system, the concrete slurry suction system comprises a grouting template 1, a grouting cavity 2 and a slurry suction template 4, the slurry suction template 4 is provided with a concave cavity consistent with the appearance of a bottle, the grouting template 1 is positioned above the concave cavity, the grouting template 1 is connected with a stirring slurry suction device (not shown) in the bottle, the grouting template 1 and the slurry suction template 4 form a bottle cavity, the slurry suction template 4 is composed of slurry suction half templates, and the grouting template 1 is connected with the grouting cavity 2; the grouting cavity is provided with an extension part 21, a grouting pipe hole 3 is formed in the extension part 21, the extension part 21 extends into a concave cavity of the grouting template 4, and a bottle wet blank 7 is formed preliminarily through grouting of the grouting pipe hole 3; the pulp suction template is provided with a pulp suction hole 5 and a pulp suction cavity 6, the pulp suction hole 5 is arranged on the surface of the concave cavity and is connected with the pulp suction cavity 6, the pulp suction hole 5 on the surface of the concave cavity respectively corresponds to a bottle opening, a bottle neck, a bottle body and a bottle bottom of the bottle cavity, the pulp suction hole density of the bottle opening, the bottle neck and the bottle body is greater than that of the bottle bottom, the pulp suction cavity 6 is connected with a vacuum device (not shown), pulp is sprayed to the part of the bottle cavity through the grouting cavity 2 and the grouting hole 3 of the extension part 21 in a mold closing state, the pulp is wood pulp, the wood pulp is uniformly dispersed through a stirring pulp suction device in the bottle, and the pulp sprayed into the bottle cavity is sufficient and uniform; starting a vacuum device (not shown), vacuumizing the pulp suction cavity 6 to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank 7 after pulp suction, controlling the vacuumizing to be about 0.7Mpa through an electromagnetic valve and a pressure gauge, and controlling the water content of the wet blank to be about 70-80% and the thickness to be 2.5 mm.
According to the figures 2a and 2b, the structure of the slurry suction system in the open and closed states is shown. The extrusion system consists of an extrusion die 8, a pressurizing cavity 9, an elastomer water bag 10, a pulp suction die 11 and a wet blank 7 after pulp suction. The pressurizing cavity 9 is arranged in the extruding die 8 and connected with the elastomer water bag 10, the extruding die 8 is arranged above the pulp sucking die 11 and forms a bottle cavity with the pulp sucking die 11, the wet blank 7 after pulp sucking is arranged in the bottle cavity, the elastomer water bag 10 extends into the wet blank arranged in the bottle cavity, and after die assembly, the elastomer water bag pressurizes, expands and extrudes the wet blank to be attached to the inner wall of the bottle cavity to form the preformed paper bottle 81. The elastic body water bag 10 is made of an elastic body which can be stretched, the mold is pressurized by filling water, and after the molding is finished, the elastic body water bag 10 is taken out by discharging water. The pulp-absorbing wet blank 7 is preformed after the elastomer is pressurized in a 'die assembly' state, and the pressure of the elastomer water bag is controlled to be 1 kilogram force, so that the water content of the preformed paper bottle is 40-50%, and the thickness of the preformed paper bottle is 1.5 mm.
Referring to fig. 3a and 3b, which show the structural schematic diagram of the hot press molding system according to the present invention in the open and closed states, the upper hot press mold 12 is composed of the elastomer water bag 14 resistant to high temperature and high pressure, and the lower hot press mold 13 is composed of 2 mold body portions 92 and a bottle bottom portion 93, and the hot press molding system is composed of the upper hot press mold 12, a pressurizing chamber 91, the elastomer water bag 14, the lower hot press mold 13, and a preformed paper bottle 81. The pressurizing cavity 91 is arranged in the hot-pressing upper die 12 and connected with the elastomer water bag 14, the hot-pressing upper die 12 is arranged above the hot-pressing lower die 13 and forms a bottle cavity with the hot-pressing lower die 13, the preformed paper bottle 81 is arranged in the bottle cavity, the elastomer water bag 14 extends into the preformed paper bottle arranged in the bottle cavity, the hot-pressing upper die 12 and the hot-pressing lower die 13 are provided with exhaust grooves, after die assembly is carried out, the hot-pressing upper die 12 is inflated under the condition of die assembly, the integral paper-plastic bottle 15 is integrally formed by deformation of the elastomer, the heating is carried out to 150 ℃ through the hot-pressing die, the pressurization of the elastomer bag is about 5 kilograms force, the water content of the finished integral paper-plastic bottle 15 is 3% -5%, the thickness is about 1.0mm, and the elastomer water bag 14 is taken out after the forming is finished.
Example 4
The slurry suction system comprises a grouting template 1, a grouting cavity 2 and a slurry suction template 4, wherein the slurry suction template 4 is provided with a concave cavity consistent with the appearance of a bottle, the grouting template 1 is positioned above the concave cavity, the grouting template 1 and the slurry suction template 4 form a bottle cavity, the slurry suction template 4 consists of a slurry suction half template, and the grouting template 1 is connected with the grouting cavity 2; the grouting cavity preliminarily forms a bottle wet blank 7 in a roller slurry throwing mode; the pulp suction template is provided with a pulp suction hole 5 and a pulp suction cavity 6, the pulp suction hole 5 is arranged on the surface of the concave cavity and is connected with the pulp suction cavity 6, the pulp suction hole 5 on the surface of the concave cavity respectively corresponds to a bottle opening, a bottle neck, a bottle body and a bottle bottom of the bottle cavity, the pulp suction hole density of the bottle opening, the bottle neck and the bottle body is greater than that of the bottle bottom, the pulp suction cavity 6 is connected with a vacuum device (not shown), under a mold closing state, pulp is thrown through the pulp injection cavity 2 to spray pulp to the part of the bottle cavity, the pulp is sugarcane pulp, and the pulp in the bottle cavity is enough and uniform; starting a vacuum device (not shown), vacuumizing the pulp suction cavity 6 to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank 7 after pulp suction, controlling the vacuumizing to be about 0.7Mpa through an electromagnetic valve and a pressure gauge, and controlling the water content of the wet blank to be about 70-80% and the thickness to be 2.5 mm.
Fig. 2a and 2b show the structure of the slurry suction system in the open and closed states. The extrusion system consists of an extrusion die 8, a pressurizing cavity 9, an elastomer oil bag 10, a slurry suction die 11 and a wet blank 7 after slurry suction. The pressurizing cavity 9 is arranged in the extruding die 8 and connected with the elastomer oil bag 10, the extruding die 8 is arranged above the slurry absorbing die 11 and forms a bottle cavity with the slurry absorbing die 11, the wet blank 7 after slurry absorption is arranged in the bottle cavity, the elastomer oil bag 10 extends into the wet blank arranged in the bottle cavity, and after die assembly, the elastomer bag pressurizes, expands and extrudes the wet blank to be attached to the inner wall of the bottle cavity to form the preformed paper bottle 81. The elastic body oil bag 10 is an elastic body which can be stretched, the pressure molding is carried out on the die by filling oil, and after the molding is finished, the oil is discharged to take out the elastic body oil bag 10. And (3) performing the wet blank 7 absorbing the slurry after the elastomer is pressurized in a 'die assembly' state, and controlling the pressure applied by the elastomer oil bag to be 1 kilogram force so that the water content of the preformed paper bottle is 40-50% and the thickness of the preformed paper bottle is 1.5 mm.
Referring to fig. 3a and 3b, which show the structural schematic diagram of the hot press molding system of the present invention in the open and closed states, the upper hot press mold 12 is composed of the elastomer oil bag 14 resistant to high temperature and high pressure, and the lower hot press mold 13 is composed of 2 mold body portions 92 and a bottle bottom portion 93, and the hot press molding system is composed of the upper hot press mold 12, the pressurizing cavity 91, the elastomer oil bag 14, the lower hot press mold 13 and the preformed paper bottle 81. The pressurization cavity 91 is arranged in the hot-pressing upper die 12 and is connected with the elastomer oil bag 14, the hot-pressing upper die 12 is arranged above the hot-pressing lower die 13 and forms a bottle cavity with the hot-pressing lower die 13, the preformed paper bottle 81 is arranged in the bottle cavity, the elastomer oil bag 14 extends into the preformed paper bottle arranged in the bottle cavity, after die assembly, the oil is filled and pressed in the hot-pressing upper die 12 under the condition of die assembly to form the integral paper-plastic bottle 15 integrally through elastomer deformation, the integral paper-plastic bottle is heated to 150 ℃ through the hot-pressing die, the pressurization of the elastomer oil bag is about 5 kilograms, redundant water is discharged, the water content of the finished integral paper-plastic bottle 15 is 3% -5%, the thickness is about 1.0mm, and the oil is discharged after the forming to take out the elastomer oil bag 14.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A mould of a paper-plastic integral bottle comprises a pulp suction mould, an extrusion mould and a hot-press forming mould, wherein the pulp suction mould comprises a grouting template, a grouting cavity and a pulp suction template; the slurry suction template is provided with a concave cavity with the same shape as the bottle, and the grouting template is positioned above the concave cavity and connected with the grouting cavity;
the method is characterized in that: the grouting cavity is provided with an extension part, grouting pipe holes are uniformly formed in the extension part, the extension part extends into the bottom of the concave cavity of the grout suction template, and a wet bottle blank is formed preliminarily through grouting of the grouting pipe holes; the grouting is slurry spraying or slurry throwing by a roller;
the slurry suction template is provided with a slurry suction hole and a slurry suction cavity, the slurry suction hole is formed in the surface of the concave cavity and is connected with the slurry suction cavity, the slurry suction cavity is connected with vacuum equipment, and a bottle wet blank formed preliminarily by grouting is formed into a wet blank after slurry suction through vacuumizing; the pulp suction holes on the surface of the concave cavity respectively correspond to the bottle mouth, the bottle neck, the bottle body and the bottle bottom of the bottle cavity, and the density of the pulp suction holes on the bottle mouth, the bottle neck and the bottle body is greater than that of the pulp suction holes on the bottle bottom;
the hot-pressing forming die consists of an upper hot-pressing die, a pressurizing cavity, an elastomer bag, a lower hot-pressing die and a preformed paper bottle, wherein the upper hot-pressing die and the lower hot-pressing die are made of breathable steel, and water vapor is sucked away by tiny holes in the breathable steel material to exhaust rapidly.
2. The mold of claim 1, wherein: the grouting template and the slurry suction template form a bottle cavity, and the slurry suction template consists of slurry suction half templates.
3. The mold of claim 1, wherein: the grouting cavity is connected with the paper pulp tank.
4. A process for forming a paper-plastic integral bottle by using the mold of any one of claims 1 to 3, comprising the steps of:
(1) assembling the slurry suction mold to enable the slurry suction mold to be in a mold closing state, and spraying slurry to the position of the bottle cavity through the grouting cavity and the grouting holes of the extension part to enable slurry in the bottle cavity to be sufficient and uniform;
(2) starting the vacuum equipment, and vacuumizing the pulp suction cavity to enable the paper pulp to be uniformly adsorbed on the surface of the pulp suction mould to form a wet blank after pulp suction;
(3) extruding through an extrusion die to form a preformed paper bottle;
(4) and heating and pressurizing through a hot-press forming die, and hot-press forming into the integral paper bottle.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010415315.8A CN111593613B (en) | 2020-05-15 | 2020-05-15 | Plastic suction mold of paper-plastic integral bottle and plastic suction process thereof |
| US17/793,932 US20230055532A1 (en) | 2020-05-15 | 2021-05-17 | Integral pulp-molded bottle, mold for molding integral pulp-molded bottle, apparatus and process for producing integral pulp-molded bottle |
| CN202180008172.1A CN115038838A (en) | 2020-05-15 | 2021-05-17 | Paper-plastic integral bottle, forming mold, equipment and production process |
| JP2022543141A JP2023510902A (en) | 2020-05-15 | 2021-05-17 | Integral bottles for pulp molding, molds, equipment and manufacturing processes |
| EP21804691.0A EP4079965B1 (en) | 2020-05-15 | 2021-05-17 | Integral pulp-molded bottle, mold for molding integral pulp-molded bottle, apparatus and process for producing integral pulp-molded bottle |
| PCT/CN2021/094157 WO2021228262A1 (en) | 2020-05-15 | 2021-05-17 | Pulp-molded integrated bottle, forming mold, apparatus, and production process |
| KR1020227024123A KR102522008B1 (en) | 2020-05-15 | 2021-05-17 | Pulp molding integral bottle, molding mold, device and production process |
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| CN202010415315.8A CN111593613B (en) | 2020-05-15 | 2020-05-15 | Plastic suction mold of paper-plastic integral bottle and plastic suction process thereof |
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| CN111593613A CN111593613A (en) | 2020-08-28 |
| CN111593613B true CN111593613B (en) | 2022-05-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4079965B1 (en) * | 2020-05-15 | 2024-04-24 | The Wing Fat Printing Co Ltd | Integral pulp-molded bottle, mold for molding integral pulp-molded bottle, apparatus and process for producing integral pulp-molded bottle |
| CN116200970B (en) * | 2023-02-22 | 2024-09-20 | 上海紫丹印务有限公司 | Production method of narrow-mouth paper container |
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