阅读说明：本技术 一种纸塑整体瓶子、成型模具和生产工艺 (Paper-plastic integral bottle, forming die and production process ) 是由 徐昆 陈俊忠 费国忠 沈超 左华伟 刘福娇 薛双喜 何广德 于 2020-05-15 设计创作，主要内容包括：一种纸塑整体瓶子、成型模具和生产工艺。本发明涉及一种纸浆模塑整体瓶子产品的开发,包括纸塑整体瓶子的模具及其制备工艺,以及制备的瓶子。所述瓶子通过预压成型模具采用弹性体袋施压制作出预压湿胚,控制预压的压力大小从而保证纸瓶湿胚的含水率及湿胚的厚度。将预压的湿胚转移到热压下模,合模后热压上模通过膨胀的弹性体袋将湿胚均匀的挤压在热压下模表面,热压下模有加热和排气功能将湿胚烘干,制作出一体化纸瓶产品。(A paper-plastic integral bottle, a forming die and a production process. The invention relates to development of a paper pulp molding integral bottle product, which comprises a mold of a paper pulp molding integral bottle, a preparation process of the mold and the prepared bottle. The bottle adopts the elastomer bag to exert pressure to produce the pre-pressed wet blank through the pre-pressing forming die, and the pre-pressed pressure is controlled so as to ensure the moisture content of the wet blank of the paper bottle and the thickness of the wet blank. And transferring the pre-pressed wet blank to a hot-pressing lower die, after die assembly, uniformly extruding the wet blank on the surface of the hot-pressing lower die by an upper hot-pressing die through an expanded elastomer bag, and drying the wet blank by the lower hot-pressing die with heating and exhausting functions to manufacture an integrated paper bottle product.)

1. The utility model provides a mould of whole bottle is moulded to paper which characterized in that: the mould comprises a pulp sucking system, an extrusion system and a hot press molding system; the slurry suction system 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 system is used for forming a preformed paper bottle by extruding an elastomer bag; the hot press molding system is used for forming the integral paper bottle through extrusion of the elastomer bag.

2. The mold of claim 1, wherein: the slurry suction system comprises a grouting template, a grouting cavity and a slurry suction template.

3. The mold of claim 2, wherein: 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 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.

4. The mold of claim 2, wherein: the grouting template and the slurry suction template form a bottle cavity, and the slurry suction template consists of a slurry suction half template; the extrusion system consists of an extrusion die, a pressurization cavity, an elastomer bag, a pulp suction die and a wet blank after pulp suction.

5. The mold of claim 4, wherein: the pressurizing cavity is arranged in the extruding die and connected with the elastomer bag, the extruding die is arranged above the slurry suction die and forms a bottle cavity with the slurry suction die, the wet blank after slurry suction 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.

6. The mold of claim 4, wherein: the elastomer bag is pressurized by filling high-pressure gas, water pressure or oil pressure and the like, so that the pressure is applied to the inner cavity of the wet blank after slurry absorption, and the functions of drainage and preforming are achieved.

7. The mold of claim 1, wherein: the hot-press molding system consists of a hot-press upper die, a pressurizing cavity, an elastomer bag, a hot-press lower die and a preformed paper bottle.

8. The mold of claim 7, wherein: 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.

9. A process for the production of paper-plastic integral bottles using the mould of any one of claims 1 to 8, comprising the steps of:

(1) assembling a slurry suction system to enable the slurry suction system to be in a mold closing state, and grouting 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) transferring the wet blank after slurry absorption to an extrusion system, 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 mold, 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;

(4) transferring the preformed paper bottle to a hot-press forming system, placing the preformed paper bottle in a bottle cavity, extending the elastomer bag into the preformed paper bottle placed in the bottle cavity, closing the mold, pressurizing and expanding the elastomer bag to extrude the preformed paper bottle to be attached to the inner wall of the bottle cavity, and hot-press forming the integral paper bottle.

10. The process according to claim 9, characterized in that: the grouting in the step (1) can be guniting, grouting, stirring and slurry sucking in a bottle or slurry throwing by a roller; the pulp can be selected from sugarcane pulp, bamboo pulp, wood pulp and the like; the steps (3) and (4) further include a step of discharging the pressurized gas or liquid to take out the elastomer bag.

Technical Field

The invention relates to the technical field of forming of paper-plastic formed products, in particular to a mold and a process for a paper-plastic integral bottle and development of the product.

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 mould for paper-plastic integral bottles comprises a pulp suction system, an extrusion system and a hot-press forming system. The slurry suction system 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 system is used for forming a preformed paper bottle by extruding an elastomer bag; the hot press molding system is used for forming the integral paper bottle through extrusion of the elastomer bag.

The slurry suction system comprises a grouting template, a grouting cavity and a slurry suction template, wherein the slurry 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, grouting pipe holes are uniformly formed in the extending part.

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.

The extrusion system consists of an extrusion die, a pressurization cavity, an elastomer bag, a pulp suction die and a wet blank after pulp suction. The pressurizing cavity is arranged in the extruding die and connected with the elastomer bag, the extruding die is arranged above the slurry suction die and forms a bottle cavity with the slurry suction die, the wet blank after slurry suction 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-press molding system consists of a hot-press upper die, a pressurizing cavity, an elastomer bag, a hot-press 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 is quickly exhausted at high temperature 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 system and the hot-press forming system may be the same or different.

The hot-press molding system is also provided with a hot-press device for heating and pressurizing the system.

The process for molding the integral bottle by using the mold comprises the following steps:

(1) assembling a slurry suction system to enable the slurry suction system to be in a mold closing state, and grouting 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 system, 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 mold, 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; and 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-press forming system, 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 the mold is closed, the elastomer bag is pressurized, expanded and extruded to be pasted on the inner wall of the bottle cavity, the hot-press forming is carried out to form the integral paper bottle, and after the forming is finished, the pressing gas or liquid is discharged to take out the elastomer bag.

The product has different thickness and water content, such as 3-5% of water content and 1.0mm of thickness.

The hot-press molding system is heated to 150 ℃ through a hot-press mold, the pressurization of the elastomer bag is about 5 kilograms force, and the hot-press molding system can be adjusted according to the requirements of products.

Drawings

FIG. 1 is a schematic structural diagram of a grouting system of the invention;

FIG. 1a is a schematic structural diagram of the grouting system of the invention in an open state;

FIG. 1b is a schematic structural diagram of the grouting system of the invention in a mold closing state;

FIG. 2 is a schematic structural view of a slurry suction system of the present invention;

FIG. 2a is a schematic structural view of the slurry suction system of the present invention in an open state;

FIG. 2b is a schematic view of the slurry suction system of the present invention in a clamped state;

FIG. 3 is a schematic structural diagram of a hot press molding system according to the present invention;

FIG. 3a is a schematic structural diagram of the hot press molding system of the present invention in an open state;

fig. 3b is a schematic structural view of the hot press molding system of the present invention in a clamped 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 figures 1a-3b and specific examples 1-4.