CN1043163C

CN1043163C - Technology for mould-pressing forming of plant-fiber product

Info

Publication number: CN1043163C
Application number: CN95101187A
Authority: CN
Inventors: 何文惠
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-20
Filing date: 1995-01-20
Publication date: 1999-04-28
Anticipated expiration: 2015-01-20
Also published as: CN1113276A

Abstract

The present invention discloses a technical method for the moulding pressure moulding of plant fibre products, particularly a processing method for paper products. Plant fibre is primarily pulped and regulated to be manufactured into fiber slurry with high concentration and is sent into a screen mesh type mould to be manufactured into paper products in various forms after pressurization, dewatering, moulding and drying processing. The technical method is simple and rapid, makes the products moulded once, enhances the production rate, saves materials, reduces cost and is suitable for large-scale mechanization production.

Description

The technology for mould-pressing forming of plant-fiber product

The present invention relates to a kind of technology for mould-pressing forming of plant-fiber product, refer in particular to a kind of processing method of paper product.

Existing various plant-fiber product mainly is divided into two classes, and a class is the long fiber product, is representative with various clothes, cloth, its preparation method is: with the fiber lengthening, form plane cloth through weaving again, then earlier, carry out cutting, splicing as required, produce finished product; Another kind of is the staple fibre product, is representative with various paper, cardboard, and its existing preparation method is: at first utilize paper technology, with staple fibre processing, form the flat article with various different performances, cut into the product of different size more on demand; After perhaps plane paper, cardboard size in accordance with regulations being cut, again through the splicing, the various three-dimensional shapes of bonding formation product, as carton, carton, paper bag etc.Its procedure of processing is numerous and diverse, and the paper product of solid shape is one through adhesive bond, owing to be subjected to the intensity, adhesion intensity, the complexity of splicing, the influence of specification size of product, the subject form of paper product is restricted; Therefore, have only the paper product of several shapes such as long, side in the market, be difficult to satisfy the demand of the paper product of various different shapes, performance.Simultaneously, form because of bonding, various technical indicators can only be parameter with the minimum, thereby have caused raw-material waste again; And the interface of splicing is easily separated, and when particularly using as the food and drink tool, bonding interface also influences attractive in appearance.

The technology for mould-pressing forming that the purpose of this invention is to provide a kind of plant-fiber product, a kind of technology for mould-pressing forming of paper product particularly is provided, it is in conjunction with paper technology of the prior art, and further process by mold pressing, make paper product one-body molded in mould, with the manufacturing technique of simplification paper product, and utilize the mould self characteristics, produce the product of various forms; And can accurately control every technical indicator by mould, and reach the consumption of saving fiber, reduce manufacturing cost, simplify handwork, to be fit to mass mechanized production.

Technical solution of the present invention is achieved in that

(1) with fiber making beating, condiment; Making fiber pulp concentration is predetermined value;

(2) fiber pulp that will handle through step (1) is injected or is pressed into sieve aperture formula mould, pressurization, and pressure is 5kg/cm ²～120kg/cm ², simultaneously, apply negative pressure in described mould outside, make the fiber pulp dehydration moulding in the mould, negative pressure is 0.05kg/cm ²～3kg/cm ², make the fiber pulp moisture reach 30%～70% (weight);

(3) will take out from mould through the shaping fiber goods after step (2) processing, oven dry makes the moisture of fibre reach 5～10% (weights).

In described step (2), describedly fiber pulp is injected or be pressed into mold process, can once carry out, promptly once the volume or weight of fiber pulp is added to scheduled volume, also can carry out step by step, fiber pulp is injected step by step or be pressed into mould, up to predetermined volume or weight.

Another technical solution of the present invention is:

(1) with the fiber making beating, condiment, making fiber pulp concentration is predetermined value;

(2) will make the l Water Paper plate through the fiber pulp after step (1) is handled, making its moisture is 60%～90% (weight), and the preliminary dimension by required goods cuts again;

(3) will send into sieve aperture formula mould through the l Water Paper plate that step (2) is handled, pressurization, making pressure is 5kg/cm ²～120kg/cm ², simultaneously, apply negative pressure in sieve aperture formula mould outside, the moulding of dewatering, negative pressure is 0.05kg/cm ²～3kg/cm ², make l Water Paper plate moisture reach 30%～60% (weight);

(4) will take out from mould through the shaping fiber goods after step (3) processing, oven dry makes the moisture of fibre reach 5～10% (weights).

In above-mentioned two kinds of technical solutions, described pressure process can be through once being added to predetermined value with pressure, and it is constant to keep-up pressure; Also can adopt the pressuring method that increases progressively gradually, up to pressure is added to predetermined value.Described negative pressure pressure process can once be applied to scheduled pressure value with negative pressure, and it is constant to keep-up pressure, and also can adopt the pressuring method that increases progressively gradually to apply negative pressure, until scheduled pressure value.

The present invention is in the condiment operation, the predetermined value that fiber pulp concentration is reached can be decided as required, and this concentration can be the fiber pulp concentration in the existing paper technology, also can be higher, its optimum range is 0.03～10% (weight), and better concentration range is 0.05～7% (weight).

Process simple and fast of the present invention owing to adopted mould pressing process, but makes the product one-shot forming, thereby has saved cutting in the prior art procedure of processing, splicing, bonding numerous and diverse operation, and can utilize die modeling to produce the product of various forms; For example: carton, various packing box, various tableware, handicraft, chair or the like; Also can in oven dry, carry out waterproof, color, coating processing, reach better desirable effect; And can accurately control every index, and realize saving the consumption of fiber, reduce the effect of manufacturing cost, and, improved productivity ratio owing to utilize Mould Machining, be fit to mass mechanized production.

Further elaborate concrete process of the present invention below in conjunction with several optimum examples.

Embodiment 1, makes the processing step of disposable hygienic meal bowl:

(1) condiment: at first with the fiber making beating, condiment makes fiber pulp concentration for containing dried fiber 1% (weight);

(2) mold pressing: will divide with quantitative sucking pump through the fiber pulp 2000ML that step (1) is handled and squeeze into for 3 times in the sieve aperture formula bowl-type mould, pressurization, making pressure is 30kg/cm ², and it is constant to keep-up pressure, and simultaneously, is positioned at sieve aperture formula mould outside and forms negative pressure by vavuum pump, makes the interior fiber pulp of mould dewater negative pressure smoothly: 0.3kg/cm ², and it is constant to keep-up pressure, making the fiber pulp moisture is 60% (weight), moulding;

For the bigger fibre of wall thickness dimension, its top layer is different with fiber quality, the performance requirement of intermediate course, for example, the top layer requires highly polished, and interlayer desired strength height does not require fineness, can select different quality as required, the fiber pulp of performance, and substep injects or is pressed into sieve aperture formula mould in batches, like this, both can ask as required and satisfy the requirement of fibre different levels to fibre property, the fiber pulp of various performances is received rational application, reduce cost.

(3) oven dry: the moulding meal bowl after will handling through step (2) takes out, and sends into temperature and be 100 ℃ drying chamber, and oven dry reaches 8% (weight), taking-up to a meal bowl moisture;

(4) spraying: will spray one deck waterproofing agent through the meal bowl that step (3) is handled, dry, or oven dry;

Waterproofing agent can adopt starch, and waterproofing agent density is 50g/m ²

(5) sterilization: will be in the meal bowl that step (4) is handled to be packed packing material into, several inner packings reinstall packing case, send into disinfection tank, use epoxyethane sterilization, take out after the certain hour sterilization.

Wherein the condiment operation in the paper technology is identical in step (1) condiment operation and the prior art; And spray, disinfection technology is prior art, so do not describing in detail.

Embodiment 2, make the disposable hygienic soupspoon:

(1) condiment: with the fiber making beating, condiment makes fiber pulp concentration for containing dried fiber 0.5% (weight);

(2) dehydration: will through dehydration, begin to take shape the lower plane l Water Paper plate of tightness through the fiber pulp of step (1) processing, it quantitatively is 500g/m ², its moisture is 80% (weight); Shear by the soupspoon size again, also can directly make little wet plate by the soupspoon size;

(3) mold pressing; To put into cochlear sieve aperture formula mould through the little l Water Paper plate after step (2) is handled, pressurization, pressure is from 5kg/cm ²To 30kg/cm ²Increase progressively pressurization, simultaneously, sieve aperture formula mould outside forms negative pressure by vavuum pump and dewaters, negative pressure from 0.1 to 0.5kg/cm ²Increase progressively pressurization, make l Water Paper plate water content reach 60% (weight) after, moulding;

(4) oven dry: will put into 100 ℃ drying chamber through the moulding soupspoon after step (3) is handled, dry 5 minutes, spraying one deck waterproofing agent continues oven dry, makes the soupspoon moisture reach 8% (weight) back and takes out;

(5) sterilization:

Above-mentioned steps (2) is made the l Water Paper plate technique and is used by paper technology in the prior art, so no longer describe in detail.

Embodiment 3, make the processing method of fibre technology goods:

(1) condiment: with fiber making beating, condiment, concentration is 1% (weight);

(2) mold pressing: will inject in this handicraft mould through the fiber pulp that step (1) is handled, pressurization, pressure is 50kg/cm ², and it is constant to keep-up pressure, simultaneously, the negative pressure dehydration, negative pressure from 0.4 to 0.8kg/cm ²Increase progressively pressurization; Make the fiber pulp water content reach 50% (weight), moulding;

(3) oven dry: will take out through the fibre that step (2) is handled, put into temperature and be 100 ℃ hothouse, oven dry makes water content reach 10% (weight);

(4) waterproof, color are handled: will carry out waterproof, color processing as required, so that effect is better through the fibre after step (3) is handled;

(5) oven dry: will put into drying chamber once more through the fibre that step (4) is handled, temperature is 60 ℃, and coating is parched;

(6) packing.

Wherein when the concentration of fiber pulp among the present invention is higher, then need to be pressed into mould with certain pressure.

Claims

1. the technology for mould-pressing forming of a plant-fiber product comprises: (1) with the fiber making beating, condiment: making fiber pulp concentration is predetermined value; (2) fiber pulp that will handle through step (1) is injected or is pressed into sieve aperture formula mould, pressurization, and pressure is 5kg/cm ²-120kg/cm ², simultaneously, apply negative pressure in described mould outside, make the fiber pulp dehydration moulding in the mould, negative pressure is 0.05kg/cm ²-3kg/cm ², make the fiber pulp moisture reach 30-70% (weight); (3) will take out from mould through the shaping fiber goods after step (2) processing, oven dry makes the moisture of fibre reach 5-10% (weight); It is characterized in that: in described step (2), describedly fiber pulp is injected or be pressed into mold process, also can carry out step by step, promptly substep injects fiber pulp or is pressed into mould, until reaching required scheduled volume (volume or weight).