CN1041904A

CN1041904A - The processing method of mold pressing bamboo product

Info

Publication number: CN1041904A
Application number: CN 88107308
Authority: CN
Inventors: 刘鹰; 王瑞扬
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-10-18
Filing date: 1988-10-18
Publication date: 1990-05-09

Abstract

A kind of with mold pressing band glue bamboo weaving or the method for the bamboo chip layer bamboo product that obtains to have definite planform or volume, being used for the bamboo is the manufacturing of abnormity component of household utensils, box body, cylinder body, housing, curved slab, sketch plate and box-like body of raw material.Mold process need be heated, and continues for some time under this pressure and temperature.One-time formed bamboo product crudy is good, and its 24 hours energy in boiling water is indeformable, do not come unstuck, and this method technology is simple, cost is low, equipment investment is few.The goods that this method makes have the advantage of timber and plastic products concurrently, promptly the stiffness height, shock-resistant, lightly, not mould aging, and cheap.The processing method of mold pressing bamboo product is that bamboo resource has been opened up new approach.

Description

The processing method of mold pressing bamboo product

The present invention relates to a kind of bamboo weaving or bamboo chip layer, obtain having the processing method of the bamboo product of definite planform or volume with mold pressing band glue.Can be used for natural bamboo is the manufacturing of the abnormity component in household utensils, box body, cylinder body, housing, curved slab, sketch plate and the box-like body of raw material.

The cycle of natural bamboo forming material is short than timber, the performance of hardness, rigidity, shock-resistant, distortion and aspects such as wearing out can same timber, plastics match in excellence or beauty, but to be woven to the raw material that main processing method can not be classified bamboo as a kind of industry by hand, bamboo resource fails to develop for a long time.Providing with bamboo wood respectively in recent Chinese publication 87100368 and the bulletin patent 87215249 is raw-material glued board manufacture method and composite plywood, the physical and mechanical property of this class glued board is better than the wood gluing plate, therefore bamboo wood is used to industry, but the method that they provided can only make flat sheet, and can not obtain a kind of goods that have definite planform or have a constant volume.

The objective of the invention is: (1) provides a kind of is that raw material makes a series of processing methods that have definite planform or have the bamboo product of a constant volume with the bamboo, bamboo resource is further developed, and solve wood substituted by bamboo in the industrial raw materials to a certain extent, with bamboo for plastics, with the problem of bamboo for steel; (2) make bamboo product simple and convenient processing method, cost low, and the investment cost of process equipment is few; (3) bamboo product that this processing method is made has higher rigidity and intensity, impact resistance, lightly attractive in appearance preferably, and durable in use.

The present invention is thermoplasticity and the thermosetting that utilizes bamboo itself to be had, quoted the die press technology for forming in plastics, the metal industry, having formed a kind of is that raw material are made definite structure or the processing method of mold pressing bamboo product of the bamboo product of a constant volume is arranged with the bamboo.This method includes following step:

1, planform, the size that requires according to goods prepares mould, and puts into press.For the mould of product size≤200mm, thickness≤10mm, can make the right angle, when and size＞200mm, thickness＞10mm,, can on number of unmolulding directions, have 10 ° of inclination angles for making things convenient for molding.All corners all need have the arc transition angle.

2, bamboo is split thin bamboo strip part, cuing open into thickness is that 0.4-2mm, width are the bamboo chip of 5-20mm.The length of bamboo chip can be cut out according to product size and be cut and splicing, so length does not limit.

3, bamboo chip is woven, form one deck bamboo weaving.

4, select employed adhesive in the present plywood production for use, for example pollopas, phenolic resins, epoxy resin, unsaturated polyester, melamine resin, thermoplastic etc., and bamboo chip or bamboo weaving dipped in adhesive.

5, treat adhesive drying on bamboo weaving or the bamboo chip after, bamboo weaving can directly be put into mould, bamboo chip then need carry out crisscross putting into mould after mating formation.The bamboo weaving or the bamboo chip number of plies are by the thickness decision of product, and bamboo weaving or bamboo chip layer need be folded neatly.

6, to the bamboo chip layer in the mould or the bamboo weaving layer 1.5-4MPa that exerts pressure, meanwhile heat 120-220 ℃, and under this pressure and temperature, continue 6～18 minutes.

7, bamboo product is taken out in release, die sinking, cooling.

8,, can carry out surface plastic spraying or spray paint to there being appearance requirement maybe need add the bamboo product of sealer.The plastic-blasting raw material can adopt polyethylene, polypropylene, and the raw material that sprays paint can be varnish, enamel paint.

Good effect of the present invention be to solve for want of a kind of for a long time at industrial manufacturing bamboo product method and make bamboo can not become the problem of industrial raw materials, realized some industrial raw materials can wood substituted by bamboo, with bamboo for plastics with the problem of bamboo for steel, also opened up new approach simultaneously for the bamboo resource of mountain area, hilly country.

Method of the present invention has following advantage:

1) quality of processing gained bamboo product is good, for example goods is put into 100 ℃ boiling water 24 hours, and goods are indeformable, do not come unstuck;

2) simple, the raw-material cost of processing technology is low.Resulting product can be directly used in industry or daily production;

3) compare with the equipment of processing plastic goods, the investment of process equipment of the present invention is low.

The advantage that processing method gained bamboo product of the present invention has is: compare with plastic products, indeformable when having high temperature, to have used of a specified duration aging, cost is low; Compare with woodwork, it has one-time formed superiority, and rigidity and intensity big, indeformable, do not go mouldy, light and handy, attractive in appearance, shock-resistant.Once the bamboo Turnover Box that can adorn 25 bottles of 640CC beer was tested, empty van intensity compressive strength＞25MPa, tensile strength＞10MPa, when ten meters were highly fallen, bottle was broken and casing is unaffected.

Accompanying drawing is a bamboo wood Turnover Box that the bamboo member that uses the inventive method to make synthesizes with the bamboo plate pack, and wherein 1 is angular member, the 2nd, and the groove insied width equals the channel member, the 3rd of Turnover Box width, right post, the 4th, and crosspiece, 5 is the hole, the 6th of mounting screw nut, bamboo base plate.

With three embodiment method of the present invention is done further narration below.

First embodiment is the method for the angular member 1 in the mold pressing accompanying drawing, and it comprises the following step: 1) make concavo-convex mould according to the physical dimension of angular member 1, and this mould is put into 180 tons press; 2) bamboo is split the thin bamboo strip, being split into thickness is that 0.8mm, width are the bamboo chip of 10-20mm, then bamboo chip is woven, and the bamboo weaving length after the braiding is more longer than member 1; 3) bamboo weaving being put into phenolic resins dips; 4) according to member thickness and bamboo chip thickness, adopting the mold pressing number of plies is four layers; After treating the adhesive drying on the bamboo weaving, in the folded mould that full cries of four layers of bamboo weaving; 5) be pressurized to 2.8MPa, be warmed to 150 ℃, pressure-maintaining and heat-preservation 10 minutes; 6) dihedral bamboo member is taken out in release, die sinking, cooling (can adopt the nature cooling); 7) length is on request cut out and is cut.

Second embodiment is the processing method of mold pressing bamboo wood bathtub, and it has the following step:

1) makes mould by the bathtub structure requirement, and put into 1200 tons of press;

2) bamboo is split the bamboo chip that the thin bamboo strip becomes wide 5～20mm, thick 0.6mm, and be woven into bamboo weaving;

3) in melamine resin adhesive, dip;

When 4) treating that glue on the bamboo weaving is dry, put into mould after neat with six layers of bamboo weaving are folded;

5) be forced into 4MPa, heat to 180 ℃, heat-insulation pressure keeping got final product release, die sinking cooling in 20 minutes, took out the bamboo wood bathtub;

6) spraying enamel paint or heat stable resin in bathtub.

The 3rd embodiment is the processing method of mold pressing bamboo wood pallet, and its step is identical with bathtub, but processing conditions and data some is different.Earlier select 180 tons of press for use and make mould according to pallet dimension size and thickness requirement, the thick 0.5mm of subdivision bamboo chip, wide 5-20mm then, and work out bamboo weaving.Get three layers of bamboo weaving and put into epoxy resin and dip, go in the mould together three layers of bamboo weaving are folded when to be dried.Employing pressure is that 2MPa, temperature are 150 ℃, heat-insulation pressure keeping demoulding after 15 minutes.Bamboo pallet outer surface can spray polyethylene or polypropylene.

Claims

1, a kind of thermoplasticity, thermosetting that utilizes bamboo itself to be had has been quoted the processing method of the mold pressing bamboo product of die press technology for forming in plastics, the metal industry, it is characterized in that comprising following step:

1) structure according to goods prepares mould, and puts into press;

2) bamboo is split slightd, being split into thickness is that 0.4-2mm, width are the bamboo chip of 5-20mm;

3) bamboo chip is woven, forms one deck bamboo weaving;

4) select a kind of adhesive in the plywood production for use, bamboo chip or bamboo weaving are dipped in adhesive;

5) require the number of plies of selected bamboo chip or bamboo weaving according to products thickness, when treating that adhesive is dry, full cry into mould bamboo weaving is stacked, perhaps bamboo chip is carried out crisscross putting into mould after mating formation;

6) to the bamboo chip layer in the mould or bamboo weaving layer exert pressure 1.5-4MPa, heat 120-220 ℃, and under this pressure and temperature, continue 6-18 minute;

7) bamboo product is taken out in release, die sinking, cooling.

2, the processing method of mold pressing bamboo product as claimed in claim 1 is characterized in that described release, die sinking, cooling, take out the step of bamboo product after, can carry out the plastic-blasting of protectiveness or decoration property or spray paint bamboo product.

3, as the prepared bamboo product of processing method of claim 1,2 described mold pressing bamboo products, it is characterized in that having definite planform, perhaps have certain volume.

4, bamboo product as claimed in claim 3 is characterized in that said bamboo product with definite planform can be the abnormity component of box-like body, sketch plate, curved slab, corrugated plate.

5, bamboo product as claimed in claim 3 is characterized in that said bamboo product with a constant volume, can be disk body, basin body, casing, box body, housing, tea set, tableware.