阅读说明：本技术 一种可用于房梁的新型刨花积材及其制造工艺 (Novel wood shaving accumulated material for house beam and manufacturing process thereof ) 是由 张育栋 李宝明 余立贵 于 2020-05-29 设计创作，主要内容包括：本发明提供一种可用于房梁的新型刨花积材及其制造工艺,通过以小径材或枝桠为原料生产的150～200mm的长刨花,再经过一系列刨花筛选风选、调施胶、铺装预压、微波加热以及热压等工艺制备而成,所述新型刨花积材厚度范围为20～80mm,密度为550-850kg/m<Sup>3</Sup>,其力学性能可达到15E-45f强度等级标准。本发明提供一种可用于房梁的新型刨花积材,该积材由于刨花以同一方向进行铺装,使其在某方向上具有超高的力学性能,在选择施胶方面选择MDI型胶水,不含毒性甲醛,能减少对人体健康的影响,同时,采用智能化连续热压机,可自动纠偏能力强,每个油缸均可独立调整,控制软件还可根据历史数据选择最优的生产工艺方案,确保了产品质量的稳定性和易操控性。(The invention provides a novel wood shaving accumulated material for house beams and a manufacturing process thereof, wherein the novel wood shaving accumulated material is prepared by producing long wood shavings with the thickness of 150-200 mm by using small diameter wood or branches as raw materials and carrying out processes of screening and winnowing of a series of wood shavings, glue mixing and applying, paving and prepressing, microwave heating, hot pressing and the like, the thickness range of the novel wood shaving accumulated material is 20-80 mm, and the density is 550-85 mm0kg/m 3 The mechanical property of the material can reach the strength grade standard of 15E-45 f. The invention provides a novel wood shaving accumulated material for a house beam, wherein wood shavings are paved in the same direction, so that the wood shavings have ultrahigh mechanical property in a certain direction, MDI (diphenylmethane diisocyanate) glue is selected in the aspect of selecting glue application, toxic formaldehyde is not contained, the influence on human health can be reduced, meanwhile, an intelligent continuous hot press is adopted, the automatic deviation rectifying capability is strong, each oil cylinder can be independently adjusted, and control software can select an optimal production process scheme according to historical data, so that the stability and the easiness in operation and control of the product quality are ensured.)

1. A novel wood shaving accumulated material for house beams and a manufacturing process thereof are characterized in that: the long wood shaving laminated material comprises an upper layer structure and a lower layer structure, wherein the shavings are longitudinally arranged, the lower layer shavings are longitudinally arranged from large to small, and the upper layer shavings are longitudinally arranged from small to large, so that a three-layer structure with the larger upper layer shavings and the smaller middle layer shavings is formed.

2. The novel wood shaving accumulated material for house beam as claimed in claim 1, wherein the thickness of the wood shaving accumulated material is in the range of 20-80 mm, and the density is 550-³The mechanical property of the material can reach the strength grade standard of 15E-45 f.

3. The new wood shaving product and the manufacturing process thereof according to claim 1, wherein the manufacturing process comprises the following steps:

(1) preparation of wood shavings

(2) Drying the shavings

(3) Screening and winnowing method for wood shavings

(4) Mixing and gluing

(5) Paving prepressing

(6) Microwave heating

(7) And (5) hot pressing.

4. The novel wood shaving accumulated material for house beams and the manufacturing process thereof as claimed in claim 3, wherein the wood shavings are produced by a long wood chipper, the raw materials of the surface layer, the subsurface layer and the core layer of the wood shavings are small-diameter poplar wood, branch wood, and poplar leftover material, sawdust and wood shavings generated in the production process of nearby plywood, laminated wood boards and particle board factories, wherein the wood shavings have a length of 150-200 mm, and the diameter of the raw materials is more than or equal to 30 mm.

5. The novel wood shaving accumulated material for house beams and the manufacturing process thereof as claimed in claim 3, wherein the wood shaving screening air is used for screening the dried long wood shavings into three materials of oversize shavings, qualified shavings and crushed aggregates by a disc screen, and the qualified shavings are then removed from the oversize shavings and the non-wood materials by a winnowing machine.

6. The new wood shaving accumulated material for house beam and the manufacturing process thereof as claimed in claim 3, wherein the paving pre-pressing comprises: the upper layer material and the lower layer material are longitudinally paved through two paving heads after aldehyde-free MDI glue is applied, wherein the upper layer longitudinally paves the wood shavings from small to large, the lower layer longitudinally paves the wood shavings from large to small to obtain a continuous slab with a three-layer structure, and the slab is subjected to a pre-press to discharge internal air and enable the slab to have certain initial strength.

Technical Field

The invention belongs to the field of wood shaving accumulated material manufacturing, and particularly relates to a novel wood shaving accumulated material for a house beam and a manufacturing process thereof.

Background

A safe and firm house is the first guarantee for ensuring the safety of lives and properties of people, and factors influencing the quality and the shock resistance of the house are various, such as the selection of building places, the quality of building materials, whether the design of building personnel is reasonable and the like.

In the construction industry, a beam is the supporting roof structure, which is the main load-bearing part of the whole building. At present, the wooden house beam has the advantages of wide sources, strong operability and the like and is widely applied to houses for rural buildings to serve as houses for supporting the top. At present, wood beams are generally made of timber piles or laminated veneer lumber of original trees, and scar knots, cracks and the like easily exist in the original timber piles, so that the wood beams do not have the performances of insect prevention, corrosion prevention, water prevention, fire prevention and the like. The laminated veneer lumber, referred to as LVL board, is a board obtained by rotary cutting or slicing raw wood into veneers, drying, gluing and hot extruding, and has the advantages of high strength, high toughness, good stability and the like. However, the LVL plate has a certain limitation in the use of the house beam because the compression and stress of the LVL plate is uniform and there is no too high compression and bending strength in a certain direction. Therefore, the invention provides a long wood shaving accumulated material which can replace LVL plates, and the compression resistance and the bending resistance of the long wood shaving accumulated material can be used as a house beam.

Disclosure of Invention

The invention aims to overcome the technical defects in the prior art and provides a novel wood shaving accumulated material for house beams and a manufacturing process thereof, wherein the wood shaving accumulated material is prepared by taking small-diameter wood or branches as raw materials to produce 150-200 mm long wood shavings and then carrying out processes of screening and winnowing of the wood shavings, glue mixing and applying, paving and prepressing, microwave heating, hot pressing and the like.

In order to solve the technical problems, the invention provides the following technical scheme:

a long wood shaving layer laminated material comprises an upper layer structure and a lower layer structure, wherein shavings are longitudinally arranged, the lower layer shavings are longitudinally arranged from large to small, and the upper layer shavings are longitudinally arranged from small to large to form a three-layer structure with the larger upper layer shavings and the smaller middle layer shavings.

Preferably, the thickness of the novel wood shaving accumulated material ranges from 20 mm to 80mm, and the density is 550-³The mechanical property of the material can reach the strength grade standard of 15E-45 f.

Preferably, the manufacturing process comprises the following steps:

(1) preparation of wood shavings

(2) Drying the shavings

(3) Screening and winnowing method for wood shavings

(4) Mixing and gluing

(5) Paving prepressing

(6) Microwave heating

(7) Hot pressing

Preferably, the wood shavings are produced by a long wood chipper, the raw materials of the wood shavings surface layer, the subsurface layer and the core layer are all selected from small poplar diameter wood, branch wood with low density, and poplar leftover materials, sawdust and wood shavings generated in the production process of nearby plywood, laminated wood boards and particle board plants, the wood shavings are 150-200 mm in length, and the diameter of the raw materials is more than or equal to 30 mm.

Preferably, the screening and winnowing of the wood shavings are to screen the dried long wood shavings into three materials of oversize wood shavings, qualified wood shavings and crushed materials by a disc screen, and the qualified wood shavings are then removed from the oversize wood shavings and the non-wood materials by a winnowing machine.

Still further preferably, the paving pre-pressing comprises: the upper layer material and the lower layer material are longitudinally paved through two paving heads after aldehyde-free MDI glue is applied, wherein the upper layer longitudinally paves the wood shavings from small to large, the lower layer longitudinally paves the wood shavings from large to small to obtain a continuous slab with a three-layer structure, and the slab is subjected to a pre-press to discharge internal air and enable the slab to have certain initial strength.

Advantageous effects

The invention provides a novel wood shaving accumulated material for a house beam, and the accumulated material has ultrahigh mechanical property in a certain direction because wood shavings are paved in the same direction, and is suitable for the house beam and other special purposes.

The invention provides a novel wood shaving accumulated material for house beams, MDI type glue is selected in the aspect of selecting glue application, toxic formaldehyde is not contained, and the influence on the human health can be reduced.

Compared with the house beam material made of other materials, the novel wood shaving accumulated material for the house beam has the advantages of easiness in processing, difficulty in breaking, low cost and the like.

Drawings

Fig. 1 is a side view of the novel wood shaving material in the present embodiment.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, which are provided for illustration only and are not intended to limit the present invention.