CN102615680B - Large-width bamboo-based car compartment floor board with reinforcing bars and production method thereof - Google Patents

Abstract

The invention relates to a floor made of bamboo as the main raw material, in particular to the floor of an automobile compartment, which includes a longitudinal textured bamboo curtain and a transverse textured bamboo sheet reinforcing rib, and also includes a longitudinal bamboo curtain, phenolic impregnated paper and a bamboo mat. The use of large-scale bamboo-based wood-based panels as the floor of the car compartment has many advantages compared with wood. First of all, bamboo resources are abundant, and bamboo resources have the advantage of being sustainable after one successful cultivation. Moso bamboo generally grows for 5 years. It can be felled and used, and the clustered bamboo in the south can be cut and used in 2 to 3 years. Using julong bamboo with better performance as raw material, its mechanical properties can be improved by more than 30%.

Description

A large-format bamboo-based automobile compartment floor with reinforcing ribs and its manufacturing method

technical field

The invention relates to a base plate made of bamboo as the main raw material, in particular to the base plate of an automobile compartment.

Background technique

Due to the need to carry goods, the car compartment requires the bottom plate to have high mechanical properties, appearance quality, impact resistance, wear resistance, insect resistance, light resistance and aging resistance. For a long time, the floor of automobile compartments has been mainly made of high-quality hardwood wood and plywood. At present, my country's high-quality wood resources are becoming increasingly scarce, and most of them are maintained by imports. Natural defects such as poor sex, plus various defects in the process of tree growth (such as knots, swirls, etc.) cause uneven quality, and the width of the wood board is also limited by the age of the tree. Therefore, wood is used as the bottom plate and fence of the car compartment restricted. Bamboo plywood and bamboo strip plywood have high strength and good wear resistance and have been used as the floor of the car for more than ten years, but most of them are spliced by small-format panels. When designing and installing, they adopt the method of adding more bottom beams and fixing them with screws. It is easy to see that the joints appear uneven due to moisture absorption and expansion, and the use condition is not satisfactory.

Contents of the invention

According to the deficiencies of the prior art, the present invention provides a new proposal for manufacturing the bottom plate of a car compartment with a large-scale bamboo-wood composite board with reinforcing ribs. When the large-format bamboo-wood composite board is used to manufacture the bottom plate of the carriage, according to the design of the carriage, reinforcing ribs can be added at the places without bottom beams. By adopting the large base plate, one large plate can be used for some carriages, which can make the design of the bottom beam of the carriage more reasonable, the assembly is simpler, and the installation time is greatly shortened.

In order to solve the above technical problems, the present invention is solved through the following technical solutions:

The utility model relates to a large-format bamboo-based automobile compartment bottom plate with reinforcing ribs, which comprises longitudinal grained bamboo curtains and transverse grained bamboo sheet reinforcing ribs, and also includes longitudinal bamboo curtains, phenolic impregnated paper and bamboo mats.

Preferably, from top to bottom, there are one layer of vertical bamboo screen, one layer of vertical texture bamboo screen, one layer of horizontal texture bamboo reinforcement, one layer of vertical texture bamboo curtain, one layer of horizontal texture bamboo reinforcement, and five layers of vertical bamboo reinforcement. Textured bamboo curtain, one layer of horizontal textured bamboo reinforcement, one layer of vertical textured bamboo curtain, one layer of horizontal textured bamboo reinforcement, one layer of vertical textured bamboo curtain, and the last layer of vertical bamboo curtain. Longitudinal bamboo curtain, impregnated with phenolic glue and dried at low temperature. In order to make the surface more beautiful, the bamboo curtain is preferably a whole piece of bamboo curtain. After drying at low temperature; there are three 60-80mm transverse grain bamboo reinforcement ribs at the longitudinal ends and the middle of the slab, which are respectively located inside the second and third longitudinal grain bamboo curtains and play the role of reinforcement ribs.

Preferably, from top to bottom, there is a layer of phenolic impregnated paper, a layer of bamboo mat, a layer of longitudinal grain bamboo curtain, a layer of transverse grain bamboo reinforcement, a layer of longitudinal grain bamboo curtain, and a layer of transverse grain bamboo reinforcement Ribs, five layers of vertical grain bamboo curtains, one layer of horizontal grain bamboo reinforcement ribs, one layer of longitudinal grain bamboo curtains, one layer of horizontal grain bamboo reinforcement ribs, one layer of vertical grain bamboo curtains, one layer of bamboo mats, and finally one layer Phenolic impregnated paper. The bamboo mat is impregnated with phenolic glue and dried at low temperature. The vertical textured bamboo curtain is impregnated with phenolic glue and dried at low temperature. There are three 60-80mm horizontal grained bamboo ribs at the two ends and the middle of the slab longitudinally, which are respectively located on the second layer and the second layer. The interior of the three-layer longitudinal grain bamboo curtain acts as a reinforcing rib.

A method for manufacturing a large-format bamboo-based automobile compartment floor with reinforcing ribs, the process steps are:

a. Sorting and finishing of veneer, bamboo curtain, and bamboo mat. The veneer is made of poplar, pine, and eucalyptus. Dry it until the moisture content is ≤10%. Dry the mat until the moisture content is below 12%, and then dry it at low temperature until the moisture content is below 18% after impregnating phenolic glue;

b. Blank assembly and hot pressing, the surface layer of bamboo mats, or bamboo curtains, or veneers are lengthened to the required length by overlapping, and then assembled with the core layer of bamboo curtains or veneers and bamboo curtains; When the force is relatively large and reinforcing ribs are added in the middle of the two bottom beams, 2-3 layers of 60-80mm wide transverse textured bamboo strips are added near the surface and back when the billet is formed. Carry out hot pressing under the condition of 2.0-4.0MPa, keep it for 12-35 minutes, then exhaust steam, pass water to cool and release pressure.

Advantages of the present invention: the use of large-scale bamboo-based wood-based panels as the bottom plate of the car compartment has many advantages compared with wood. First, bamboo resources are abundant, and bamboo resources have the advantage of sustainable utilization after one successful cultivation. It can be felled and used after 5 years of growth, and the clustered bamboo in the southern region can be cut and used after 2 to 3 years. my country is rich in fast-growing wood resources, such as poplar, eucalyptus, pine, etc. The mechanical properties of bamboo-based carriage floors are superior to those of general hardwood and bamboo plywood. If julong bamboo with better performance is used as raw material, its mechanical properties can be improved by more than 30%. Due to the use of high-strength thin bamboo curtains on the upper and lower surfaces of the board, and the use of veneer or bamboo curtains as the core layer, the composite board not only has high mechanical properties, but also solves the problems of cumbersome processing of bamboo curtains and shortage of production and supply. Due to the large-format installation, the number of bottom beams with carriages can be reduced, and the number of screws for fixing the bottom plate can be reduced, and the installation efficiency can also be improved. Another board surface is smooth and seamless. If the surface layer is covered with phenolic impregnated paper, the produced board can be used directly without painting, especially suitable for the use of open car compartments.

Description of drawings

Fig. 1 is the structural schematic diagram of the first large-format bamboo-based automobile compartment floor.

Fig. 2 is the structural schematic diagram of the second large-scale bamboo-based automobile compartment floor.

Detailed ways

Below in conjunction with accompanying drawing 1 to accompanying drawing 2 and embodiment the present invention is described in further detail:

A kind of large-format bamboo-based automobile compartment floor with reinforcing ribs, as shown in Fig. 1 and Fig. 2, includes longitudinal grain bamboo curtain 2 and transverse grain bamboo slice reinforcing rib 3, also includes longitudinal bamboo curtain 1, phenolic impregnated paper 4 and Bamboo mat5.

As shown in Figure 1, from top to bottom, there is a layer of vertical bamboo curtain 1, a layer of vertical texture bamboo curtain 2, a layer of horizontal texture bamboo ribs 3, a layer of longitudinal texture bamboo curtain 2, and a layer of horizontal texture bamboo Sheet reinforcement 3, five layers of longitudinal texture bamboo curtain 2, one layer of horizontal texture bamboo reinforcement 3, one layer of longitudinal texture bamboo curtain 2, one layer of horizontal texture bamboo reinforcement 3, one layer of longitudinal texture bamboo curtain 2, and finally A layer of longitudinal bamboo curtains1.

As shown in Figure 1, from top to bottom there is a layer of phenolic impregnated paper 4, a layer of bamboo mat 5, a layer of vertical textured bamboo curtain 2, a layer of horizontal textured bamboo ribs 3, and a layer of vertical textured bamboo curtain 2 , one layer of horizontal grain bamboo ribs 3, five layers of vertical grain bamboo curtains 2, one layer of horizontal grain bamboo ribs 3, one layer of longitudinal grain bamboo curtains 2, one layer of horizontal grain bamboo ribs 3, one layer of vertical Texture bamboo curtain 2, a layer of bamboo mat 5, and finally a layer of phenolic impregnated paper 4.

Example 1

The structure of the large-format bamboo-based automobile compartment floor is shown in Figure 1.

The manufacturing method of the large-format bamboo-based automobile compartment floor is as follows:

a. Sorting and finishing of bamboo curtains. The thickness of bamboo curtains on the surface should not be too thick, and the gaps are small. All bamboo curtains have no residual bamboo green and bamboo yellow. Bamboo curtains are dried to a moisture content below 12%, impregnated with phenolic glue and dried at low temperature to below 18% moisture content;

b. Blank assembly and hot pressing, the structure is symmetrical from the outside to the inside, using one layer of longitudinal bamboo curtains 1 impregnated with phenolic glue and dried at low temperature, and then nine layers of overlapping longitudinal bamboo curtains impregnated with phenolic glue and dried at low temperature. The textured bamboo curtain 2 has three 60-80 mm transverse textured bamboo reinforcement ribs 3 at both ends and in the middle of the slab longitudinal direction, which are located inside the second and third longitudinal textured bamboo curtains 2 respectively. Then carry out hot pressing at a temperature of 140°C and a maximum pressure of 3.0 MPa, keep it for 20 minutes, then exhaust steam, pass water to cool and release the pressure.

After conventional post-processing, the finished bamboo-based automobile compartment floor can be obtained, and its physical and mechanical properties are as follows:

MOR∥： ≥ 110 MPa

MOR⊥: ≥ 15 MPa

MOE∥： ≥ 11500 MPa

MOE⊥： ≥ 1000 MPa

Density: 0.75～0.95 g/cm ³ .

Example 2

The structure of the large-format bamboo-based automobile compartment floor is shown in Figure 2.

The manufacturing method of the large-format bamboo-based automobile compartment floor is as follows:

a. Sorting and finishing of bamboo curtains and mats. The thickness of bamboo mats should not be too thick, the gaps are small, and the weaving is regular. Bamboo curtains and mats have no residual bamboo green and bamboo yellow. After drying to a moisture content of less than 12%, impregnated with phenolic formaldehyde Glue and dry at low temperature until the moisture content is below 18%;

b. Blank assembly and hot pressing, the structure is symmetrical from the outside to the inside with a layer of phenolic impregnated paper (4), a layer of bamboo mat impregnated with phenolic glue and dried at low temperature 5, and then nine layers of impregnated phenolic glue inward The overlapping vertical grain bamboo curtain 2 that has been dried at low temperature has three 60-80mm transverse grain bamboo reinforcement ribs 3 at both ends and in the middle of the slab longitudinal direction, which are respectively located on the second and third layers of the longitudinal grain bamboo curtain 2. internal. Then carry out hot pressing at a temperature of 145° C. and a maximum pressure of 3.5 MPa, keep it for 20 minutes, then exhaust steam, pass water to cool and release the pressure.

After conventional post-processing, the finished bamboo-based automobile compartment floor can be obtained, and its physical and mechanical properties are as follows:

MOR∥： ≥ 100 MPa

MOR⊥: ≥ 20 MPa

MOE∥： ≥ 10000 MPa

MOE⊥： ≥ 2000 MPa

Density: 0.65～0.85 g/cm ³ .

In a word, the above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (1)

1. the large width bamboo base automobile compartment floor with reinforcement, comprise longitudinal texture bamboo curtain splint (2) and cross grain bamboo chip reinforcement (3), longitudinally bamboo curtain splint (1), hard paper (4) and bamboo mat (5), it is characterized in that: be followed successively by from top to bottom one deck hard paper (4), one deck bamboo mat (5), the longitudinal texture bamboo curtain splint of one deck (2), one deck cross grain bamboo chip reinforcement (3), the longitudinal texture bamboo curtain splint of one deck (2), one deck cross grain bamboo chip reinforcement (3), five layers of longitudinal texture bamboo curtain splint (2), one deck cross grain bamboo chip reinforcement (3), the longitudinal texture bamboo curtain splint of one deck (2), one deck cross grain bamboo chip reinforcement (3), the longitudinal texture bamboo curtain splint of one deck (2), one deck bamboo mat (5) and one deck hard paper (4), cross grain bamboo chip reinforcement (3) is positioned at the longitudinal two ends of slab and middle three places, the wide of cross grain bamboo chip reinforcement (3) is 60～80mm.