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A method for producing hollow particleboard by two-step flat pressing method

A chipboard and hollow technology, which is applied in the field of hollow particleboard production by two-step flat pressing method, can solve the problems of difficult production of thin boards, difficulty in demoulding, high water absorption thickness expansion rate, etc., and achieve equipment cost saving, excellent mechanical properties, and low formaldehyde The effect of release volume

Inactive Publication Date: 2016-05-04
NANJING FORESTRY UNIV
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  • Claims
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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for producing hollow particleboard by two-step flat pressing method, which aims to solve the problems of difficult demoulding and high water expansion rate in the thickness direction of the existing production of hollow particleboard. , Extrusion method to produce hollow particleboard process exists to limit the production of products with low longitudinal static bending strength, high water absorption thickness expansion rate in the longitudinal direction, and difficult to produce thin boards

Method used

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  • A method for producing hollow particleboard by two-step flat pressing method
  • A method for producing hollow particleboard by two-step flat pressing method
  • A method for producing hollow particleboard by two-step flat pressing method

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specific Embodiment approach

[0060] Dimensional Design of Hollow Particleboard Particleboard:

[0061] Dimensions: 400×400××40mm; Hollow radius: 15mm; A1: 10mm; A2: 5mm; A3: 5mm; Hollow rate K: 64.8%,

[0062] Process parameters:

[0063]Select poplar wood shavings, after drying, the moisture content is 3.5%, select phenolic resin adhesive (solid content 45%, viscosity 120s), and add liquid paraffin water repellent with a solid mass ratio of 1.2%, and mix them evenly. Glue sizing, the glue spraying method is selected, the pre-pressing pressure is 1.5MPa for 3 minutes, the single-layer press is used, the hot-pressing time is 190°C and the time is 12 minutes, and the hot-pressing pressure is the unit pressure of 3MPa. One side of the hole is coated with modified polyvinyl acetate emulsion glue, and sent to a press for cold pressing to obtain the final product. The specific process steps are as follows:

[0064] Step 1: Place the semi-circular mold on the backing board at equal intervals along the length o...

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Abstract

The invention discloses a method utilizing a two-step flat pressing process to produce hollow-core particleboards and composite boards. The method includes: producing single particleboards, and allowing each single particleboard to have a semicircular hole in a single face; coating modified polyvinyl acetate emulsion on a hollow-core face of each of two single particleboards, allowing the hollow-cores of the two single particleboards to be symmetrical, and then feeding the two signal particleboards into a cold pressing machine for cold pressing. By the method, the defects of direct flat pressing and extrusion methods are overcome, and the produced particleboards and composite boards are excellent in dynamic performance, low in formaldehyde emission, high in ratio of strength to weight and the like, can be used directly without applying veneers on surfaces, and is widely applicable to building and furniture industries. In addition, single-layer or multi-layer pressing machines are utilized, equipment cost is saved due to the fact that no new equipment needs to be purchased, and specific significance is provided for small and medium-sized artificial board enterprises.

Description

technical field [0001] The invention belongs to the technical field of hollow particleboard manufacturing, and in particular relates to a method for producing hollow particleboards by using a two-step flat pressing method. Background technique [0002] As a new type of engineering material, particleboard with hollow structure is mainly used in the wooden door industry and decoration industry compared with ordinary particleboard. Today, when the real estate industry is booming, hollow particleboard has many advantages in this market segment. It has excellent physical properties and density. Lower than ordinary particleboard, it has good thermal insulation, sound insulation and compression resistance. At present, in the domestic market, hollow particleboard is widely used in: door core material of wooden doors, interior decoration wall partition material, furniture baffle, desktop core material Wait. [0003] The production of hollow particleboard can be divided into two type...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/08B27N3/02
Inventor 孙丰文田浩友王建明
Owner NANJING FORESTRY UNIV
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