TECHNICAL FIELD

The present invention relates to a bamboo strip shaping device and method, belonging to the technical field of phyllostachys pubescens processing.

BACKGROUND

China is a large country of bamboo planting and bamboo industry. Bamboo products are closely related to people's lives and permeate every aspect of people's daily life. However, the natural tubular structure of the bamboo has a small radian, which does not facilitate the processing and utilization of curved bamboo strips. At the same time, the difference between curvature radii of different phyllostachys pubescens also limits their application. It is necessary to solve the problem how the bamboo can be processed into a specific radian, namely the same curvature radius, so as to facilitate the processing and utilization of the bamboo.

SUMMARY

In view of the technical problem to be solved, the present invention provides a bamboo strip shaping device and method, which achieve crack-free same-radian shaping and drying shaping of curved bamboo strips by a method of steam softening and then shaping and drying shaping for many times, and can widen the processing and utilization range of bamboos.

In order to solve the foregoing technical problem, the technical solution adopted by the present invention is as follows:

a bamboo strip shaping device, including an upper fixing plate and a lower fixing plate, where the upper fixing plate is connected to the lower fixing plate through supporting frames, an upper surface of the lower fixing plate is provided with a lower shaping plate, the lower shaping plate is provided with a lower steam injection channel, an upper surface of the upper fixing plate is provided with a limiting plate, a pressure plate is disposed above the limiting plate, connecting rod channels each for sliding a connecting rod is disposed in the upper fixing plate, pressing rods are each connected to a lower surface of the pressure plate, the pressing rod is connected to the connecting rod after passing through the limiting plate, an upper shaping plate is connected to a lower portion of the connecting rod, the upper shaping plate is provided with an upper steam injection channel, the upper shaping plate and the lower shaping plate each have an arc-shaped structure, the pressing rod is sleeved with a tension spring, an upper end of the tension spring is connected to a lower surface of the limiting plate, and a lower end of the tension spring is connected to an upper surface of the connecting rod.

The number of the connecting rods and the number of the pressing rods are each N, where N is an integer greater than or equal to 3.

A bamboo strip shaping method includes the following steps:

S01: cutting a bamboo tube, and removing inner joints, outer joints and bamboo outer skin;

S02: trisecting or quartering the bamboo tube in a longitudinal direction to obtain curved bamboo strips;

S03: placing the curved bamboo strips in a bamboo strip shaping device for processing;

S04: subjecting the curved bamboo strips to steam treatment and heating softening treatment;

S05: pressing and shaping the curved bamboo strips to obtain flattened bamboo strips, and drying for the first time under a maintained pressure;

S06: wetting bamboo outer skin surfaces and bamboo inner skin surfaces of the flattened bamboo strips, and drying for the second time; and

S07: wetting the bamboo outer skin surfaces and the bamboo inner skin surfaces of the flattened bamboo strips, and drying for the third time.

In S01, a cut length of the bamboo tube is within 600 mm, and the bamboo outer skin removal is performed by installing limiting teeth on a bamboo outer skin removing milling spindle and applying an air pressure of 0.3-0.7 MPa, with a bamboo outer skin removal thickness of 0.4-0.7 mm.

In S04, the steam treatment temperature is 150-180° C. and the time is 5-10 min; and the heating softening treatment temperature is 150° C.

In S05, drying is performed until the water content is not greater than 12%.

In S06, the wetting process includes spraying water for 1 min, stopping for 10 min, then spraying water for 1 min and stopping for 10 min; and drying is set at 90° C. and is performed until the water content is not greater than 12%.

In S07, the wetting process includes spraying water for 2 min; and drying is set at 80° C. and is performed until the water content is not greater than 12%.

The present invention has the beneficial effects that the present invention provides a bamboo strip shaping device and method; first through steam softening of the whole bamboo strips, the transverse mechanical property of phyllostachys pubescens is reduced, and crack-free nick-free flattening of the curved bamboo strips is achieved; under pressurization, the shaping of bamboo strips with a specific radian is achieved by using a method of drying for many times, and the flattened bamboo strips do not recover and have good flatness; and the steam softening of the bamboo has lower energy consumption and higher efficiency.

