CN100569466C - Method for highly effective producing bamboo tow - Google Patents

Abstract

A kind of high-efficiency production method of bamboo tow, including section cutting, longitudinal splitting, end clamping, positive and negative twisting, splitting and unfolding and other processes, bamboo is cut into 300-2500mm bamboo sections, rolled, rolled and flat pressed Split the bamboo section longitudinally into pieces, fix both ends of the bamboo section with a special clamp consisting of an outer clamp body and an inner lining core, and use an ordinary lathe as a twisting machine for the bamboo section. The forward and reverse twist angles of the bamboo fibers are 40 Twist at -75° for 1-3 times, and then pull it apart or cut it open and flatten it, remove the internal fragments, and then make bamboo strands, which are used as raw materials for the production of bamboo plywood. The production efficiency of bamboo strands is remarkable. The advantages of improving and expanding the application field of ordinary lathes.

Description

Efficient Production Method of Bamboo Tow

technical field

The invention relates to a manufacturing method of bamboo fiber, a machine tool and the accessories of the machine tool.

Background technique

The production of bamboo plywood with bamboo as raw material has a process from rough to refined. Earlier, the thin slices of bamboo were used as raw materials, thick bamboo plywood arranged in the same longitudinal direction, and thin bamboo slices were criss-crossed and layered. Arranged bamboo plywood, bamboo plywood glued together after weaving into bamboo mats, and bamboo plywood laminated with thicker bamboo sheets for bamboo flooring. The above bamboo plywood is made of thick and thin bamboo sheets. The board produced has obvious flake marks and rough texture, which is not suitable for making high-end furniture and high-grade floors. Taking bamboo chips as raw materials has a large amount of processing, many procedures, low utilization rate of raw materials, and the pressed board has large internal stress and is easy to deform. In recent years, in order to save bamboo resources, reduce the amount of processing, reduce internal stress, and produce high-grade bamboo plywood, there is a trend of changing bamboo chips into bamboo tow as raw materials. CN1042810C announced Mr. Jiang Daoyou's "Bamboo Plywood Production Method" Patented technology, the moso bamboo is cut open and rolled into flat sheets with sides, and then soaked in warm water containing alkali for 1-2 hours, and then sent to the rolling mill for rolling and pressing for the second time, so that the bamboo slices are softened, the bamboo fibers are loose, and the bamboo fibers are evenly distributed. That is, the bamboo slices become bamboo tows, which are glued, assembled, and hot-pressed into boards. CN1133533C announced Anji Tianfeng Wood Industry Co., Ltd.'s patented technology of "bamboo recombination and strengthening molding materials", objectively pointing out many shortcomings of sheet glued composite boards, using bamboo chips and then pressing them into silk-like non-silk , The continuous piece of silk that looks like a piece but not a piece is similar to the raw material of bamboo tow, and then it is made into a high-quality bamboo plywood with a density of 0.9-1.3g/cm ³ after dipping, drying, forming a billet, high pressure, and heat curing. The high-quality bamboo flooring is sold well at home and abroad.

It is a recent popular trend to process bamboo into bamboo tow and then further produce bamboo products, especially bamboo plywood. Several procedures cannot be separated from the forming nests and sockets that first become bamboo chips and then become tows, and the work efficiency is very low.

Contents of the invention

The purpose of the present invention is to design a kind of high-efficiency production method of bamboo tow as well as its machinery and fixtures for the shortage of low work efficiency in producing bamboo tow in the prior art.

The purpose of the present invention is achieved by the following measures: the efficient production method of bamboo tow is characterized in that it comprises the following steps:

(1) Segmentation: Select 4-5-year-old moso bamboo to cut into segments, and the segment length is 300-2500mm;

(2) Longitudinal cracking: the round bamboo section is rolled and flattened, so that the bamboo section is longitudinally cracked and the bamboo joints are crushed;

(3) End clamp: install the longitudinally split bamboo section after rolling on a common lathe, and clamp and fix the two ends of the bamboo section with special clamps;

(4) Forward and reverse twisting: Use the forward and reverse motor and gearbox to control the forward and reverse twisting of the twisting machine alternately, and the forward and reverse twist angles of bamboo fibers are 40°-75°;

(5) Cutting and flattening: if the thread is attached, if it is difficult to pull it apart, cut it with a circular saw or cut it with a knife and then flatten it. If there is no thread, it will be flattened directly, and the inner segment fragments will be removed;

The special clamp is composed of two parts, the outer clamp body and the inner lining core. The front half of the inner cavity formed by the outer clamp body is a circular frustum, and the second half is a cylinder. Longitudinal convex teeth are distributed on the inner wall of the front half of the outer clamp body. The front half of the inner lining core is a cone, the second half is a cylinder, the front half of the inner lining core is distributed with longitudinal convex racks, and the inclination of the frustum of the inner cavity of the outer clamp is equal to or equal to the inclination of the inner lining core cone. very close.

After flattening, use a double-sided planer to remove bamboo green and bamboo yellow and determine the thickness.

Said twisting machine is a common lathe with special fixtures.

The beneficial effect of the invention is that the production efficiency of the bamboo tow is greatly improved, and the new application of the common lathe is expanded.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments: the special clamp is used to clamp the two ends of the bamboo section to be processed into bamboo tow, and it consists of two parts: an outer clamp body with a petal type and an integrated inner lining core. , the front half of the inner cavity surrounded by the outer clamp body is a circular frustum, and the second half is a cylinder. The front half of the lining core is a cone, and the second half is a cylinder. The interface between the two bodies is a common circular surface, that is, a natural transition surface. The front half of the lining core is distributed with longitudinal convex racks, and the inner cavity of the outer clamp is round. The slope of the body is equal to or very close to the slope of the inner core cone. The pointed shape of the cone end of the front half of the lining core can also be changed into a flat mouth shape or a wedge shape. The above-mentioned first half and second half cannot be regarded as a distinction in a strict sense, but a rough boundary. The rack has a height of 1-5mm, a length of 5-55mm, and a width of about 5mm at the bottom. It is a wedge-shaped rack with a narrow top and a wide bottom to increase the clamping force on the end of the bamboo segment. The outer clamp body clamps the outer circumference of both ends of the bamboo segment, and the inner lining core is inserted into the hollow part of the bamboo segment tightly. It is necessary to make a series of clamps according to the diameter of the bamboo segment, and choose carbon steel, cast steel, and hard alloy steel with high hardness. make.

Use ordinary lathe to be used as bamboo tow high-efficiency production machine, then processing length needs the ordinary lathe of ≥ 2500mm, because the maximum length of the processing bamboo section of the present invention is 2500mm. The outer clamp body of this special fixture is installed on the three-jaw chuck on the headstock of the lathe, and the thimble part of the tailstock of the lathe is slightly improved to install the outer clamp body of this special fixture. Fix the headstock so that the tailstock can move, and change direction whenever the torsion angle reaches 40°-75°C.

Below this bamboo tow efficient production step is described as follows:

(1) Section. Select 4 or 5 years old, diameter 80-180mm moso bamboo and cut it into bamboo sections with a length of 300-2500mm. Other small-diameter bamboos and larger-diameter moso bamboos are available, and the former is preferred.

(2) Longitudinal fracture. The round bamboo sections are rolled and pressed by rolling, rolling, and flat pressing, so that the bamboo sections are longitudinally cracked and the inner nodes are crushed.

(3) End clips. Install the two ends of the flat longitudinally split bamboo section on the ordinary lathe, the outer clamp body of the special clamp clamps the outer circumference of the two ends of the bamboo section, and the inner lining core is tightly plugged into the hollow part of the two ends of the bamboo section, and fixed.

(4) Twist positively and negatively. Use the forward and reverse motor to drive and the gearbox to control the forward and reverse rotation of the ordinary lathe alternately. Whenever the torsion angle of the bamboo fiber reaches 40°-75°C, the reverse direction is twisted to 1-3 times each.

(5) Cutting and flattening. If there are still threads that cannot be pulled apart, use a circular saw or machete to cut and flatten. If the longitudinal cracks are thorough, you can manually pull and flatten them to remove internal fragments, and use them as raw materials for making bamboo plywood.

It is necessary to remove the outer layer of bamboo green and the inner layer of bamboo yellow with a double-sided planer to plan and determine the thickness, and then use it as a raw material for making bamboo plywood.

Embodiment 1: with 4 years old moso bamboo diameter at breast height 80mm, cut length 80mm bamboo section, one by one rolling pressure longitudinal crack, insert the inner liner core of the special clamp of the present invention that matches with this bamboo section tightly with diameter and insert two longitudinal crack bamboo sections In the hollow end, move it to a common lathe, and clamp it on the outer clamp body of the special fixture of the present invention on the headstock and tailstock respectively. The tailstock is in a state that can reciprocate and move along the track. When the forward twist angle reaches 65°, it will automatically turn +65°counterclockwise, and then turn back to clockwise. In this way, the bamboo filaments will be formed by twisting each forward and reverse twice. At the same time, the positive and negative conversion and rotation , The tailstock moves back and forth due to the twisting and deformation of the bamboo segment. Then remove the bamboo strands from the jig, saw and flatten them, remove the crushed inner segments, use a double-sided planer to plan off the bamboo green and bamboo yellow, and determine the thickness, as a layered 80mm×80mm bamboo plywood for criss-cross pavement raw materials.

Implementation falls 2: use the 5-year-old diameter at breast height of 180mm moso bamboo section length to be 2500mm of bamboo section, rolling flat longitudinal split, with the mold supporting the diameter of this bamboo section, S19 inches produced in Zhenjiang machine tool factory, 482 * 3000 common lathe Twist the front and back three times in the middle, and the torsion angle is 75 °. As in Example 1, the bamboo tow is obtained, cut and flattened, and the green and yellow of the bamboo are removed, which is used as a raw material for reorganizing the reinforced molding.

Embodiment 3: use 5 years old diameter 100mm Phyllostachys pubescens basal excess material (Φ about 120mm) or tip surplus material (Φ about 80mm), cut into 300mm bamboo section (utilize as edge material), classify respectively and use flat press for fracturing , each of which is fixed on the rotating and fixing parts of the ordinary lathe with a matching fixture of diameter, and twisted alternately in the positive and negative directions, and the moving part moves back and forth along the slide rail, as in Example 1. , remove the internal fragments, do not use double-sided planing, do not remove bamboo green and bamboo yellow, and use it as the core material of layered bamboo plywood or other composite boards.

Claims (3)

1, a kind of method for highly effective producing bamboo tow is characterized in that comprising the following steps:

(1) intercept: select the 4-5 age mao bamboon section of being cut into, segment length 300-2500mm;

(2) lobe: will justify the roll compacting of bamboo section and be tending towards flat, and make the bamboo section lobe and the ring of crushing;

(3) end folder: lobe bamboo section after the roll compacting is contained on the engine lathe, and bamboo section two ends are fixedly clamped with special fixture;

(4) positive and negative twisting turned round: just twisting and instead twisting with clockwise and anticlockwise motor and gearbox control machine for twist and hocketing, the positive and negative torsion angle of bamboo fibre respectively is 40 °-75 °;

(5) cut open and flatten: the silk of ining succession, pull open cutting open or cutter is cut to open again and flattened of difficulty with annular saw, there is not the direct flattening that connects silk, remove the internal segment fragment;

Described special fixture is made up of external clip and liner core two parts, and the inner chamber first half that external clip is enclosed is Rotary-table, and the latter half of cylinder that is is distributed with vertical convex tooth strips on the external clip first half internal face; The first half of liner core is cone, and latter half is cylinder, and liner core first half surface distributed has vertical convex tooth strips, and external clip inner chamber Rotary-table gradient equates with liner core cone gradient or be extremely close.

2, method for highly effective producing bamboo tow as claimed in claim 1 is characterized in that flattening the back with double surfacer shoot off surf green, tabasheer and fixed thick.

3, method for highly effective producing bamboo tow as claimed in claim 1 is characterized in that the engine lathe of said machine for twist for the band special fixture.