阅读说明：本技术 一种纸塑整体瓶子的热压成型模具及其热压成型工艺 (Hot-press forming die and hot-press forming process for paper-plastic integral bottle ) 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：本发明涉及一种纸塑整体瓶子的热压成型模具及其热压成型工艺。所述模具由热压上模、加压腔体、弹性体袋、热压下模和预成型的纸瓶组成；首先预压成型模具采用弹性体袋施压制作出预压湿胚,然后将预压湿胚转移到热压成型模具,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。(The invention relates to a hot-press forming die of a paper-plastic integral bottle and a hot-press forming process thereof. The mould consists of a hot-pressing upper mould, a pressurizing cavity, an elastomer bag, a hot-pressing lower mould and a preformed paper bottle; firstly, a pre-pressing forming die applies pressure to a pre-pressing wet blank by adopting an elastomer bag, then the pre-pressing wet blank is transferred to a hot-pressing forming die, after die assembly, a hot-pressing upper die uniformly extrudes the wet blank on the surface of a hot-pressing lower die through an expanded elastomer bag, and the hot-pressing lower die has the heating and exhausting functions to dry the wet blank, so that an integrated paper bottle product is manufactured.)

1. The utility model provides a hot briquetting mould of whole bottle is moulded to paper which characterized in that: the mould consists of a hot-pressing upper mould, a pressurizing cavity, an elastomer bag, a hot-pressing lower mould 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.

2. The mold of claim 1, wherein: the elastomer bag plays a role in draining and forming the pressure of the inner cavity of the preformed paper bottle by filling high-pressure gas, water pressure or oil pressure.

3. The mold of claim 2, wherein: the hot-pressing upper die and the hot-pressing lower die form a bottle cavity.

4. The mold of claim 2, wherein: the hot-pressing lower die consists of a bottle body part and a bottle bottom part.

5. The mold of claim 1, wherein: the hot pressing lower die is made of a breathable material and can be polished.

6. The mold of claim 5, wherein: the hot-pressing lower die is made of breathable steel.

7. The utility model provides a mould of whole bottle is moulded to paper which characterized in that: the mold comprises a hot press molding die for the paper-plastic integral bottle of any one of claims 1 to 6.

8. The mold of claim 7, wherein: the mould also comprises a pulp suction mould and an extrusion mould.

9. A hot press molding process of a paper-plastic integral bottle, which uses the mold of any one of claims 1 to 6, and comprises the following steps:

(1) extruding to form a preformed paper bottle;

(2) 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.

10. A process for the production of paper-plastic integral bottles using the mould of any one of claims 1 to 6, comprising the steps of:

(1) preparing wet embryos after pulp absorption;

(2) preliminarily shaping the wet blank subjected to pulp absorption in an extrusion die to form a preformed paper bottle;

(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.

Technical Field

The invention relates to the technical field of forming of paper-plastic forming products, in particular to development of a hot-press forming die for 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 hot-press forming die for a paper-plastic integral bottle comprises 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 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.

A hot press molding process of a paper-plastic integral bottle uses the mold and comprises the following steps:

(1) extruding to form a preformed paper bottle;

(2) 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. And after the molding is finished, discharging the pressurized gas or liquid and taking out the elastomer bag.

A mould for paper-plastic integral bottle comprises a pulp suction mould, an extrusion mould and a hot-press 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-pressing forming die is used for forming an integral paper bottle through extrusion of the elastomer bag; the slurry suction mould 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 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.

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 grouting can be guniting, grouting, stirring and slurry sucking in a bottle or slurry throwing by a roller.

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 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 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 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 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 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, the pressurized gas or liquid is discharged to take 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. After the molding is finished, the pressurized gas or liquid is discharged and the elastomer bag is taken out

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

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 molding 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.