An apparatus and method for its use employ a magnet assembly to securely hold a knife by its blade. Along with a carriage and angle adjustment assembly that set and control the sharpening angle of the knife relative to a sharpening surface, the apparatus provides for sharpening of knives such as double hollow ground reed scraping knives, and bevel reed scraping knives.

A preparation method for raw bamboo fiber strips and a processing machine are provided. The preparation method includes: cutting bamboo wood into bamboo tubes according to a length of each of bamboo joints, and cutting the bamboo tubes into bamboo pieces; processing the bamboo pieces into the bamboo fiber skins through a processing machine; performing fermentation treatment on the bamboo fiber skins, and performing drying treatment after the fermentation is completed; performing kneading, oiling and conditioning treatments on the dried bamboo fiber skins; performing combing and drawing treatments on the conditioned bamboo fiber skins; and zoning and storing.

A preparation method for raw bamboo fiber strips and a processing machine are provided. The preparation method includes: cutting bamboo wood into bamboo tubes according to a length of each of bamboo joints, and cutting the bamboo tubes into bamboo pieces; processing the bamboo pieces into the bamboo fiber skins through a processing machine; performing fermentation treatment on the bamboo fiber skins, and performing drying treatment after the fermentation is completed; performing kneading, oiling and conditioning treatments on the dried bamboo fiber skins; performing combing and drawing treatments on the conditioned bamboo fiber skins; and zoning and storing.

A bamboo toothbrush manufacturing method may include an operation of preparing raw materials, which selecting some of the raw materials as materials suitable for manufacturing bamboo toothbrushes on the basis of a vascular bundle ratio on the cross-section of each of the raw materials; a milling operation of processing the selected materials into the shapes of toothbrush bodies; a pretreatment operation of placing the materials, which have been subjected to the milling process, in an environment having a certain temperature range and a certain humidity range for a certain time range; a hot pressing operation of inserting the materials into a press die, and heating and pressing the materials; an operation of sanding and coating the materials; a drilling operation of forming a plurality of holes in a head portion of each of the materials; and an operation of planting toothbrush bristles into the plurality of holes.

A bamboo toothbrush manufacturing method may include an operation of preparing raw materials, which selecting some of the raw materials as materials suitable for manufacturing bamboo toothbrushes on the basis of a vascular bundle ratio on the cross-section of each of the raw materials; a milling operation of processing the selected materials into the shapes of toothbrush bodies; a pretreatment operation of placing the materials, which have been subjected to the milling process, in an environment having a certain temperature range and a certain humidity range for a certain time range; a hot pressing operation of inserting the materials into a press die, and heating and pressing the materials; an operation of sanding and coating the materials; a drilling operation of forming a plurality of holes in a head portion of each of the materials; and an operation of planting toothbrush bristles into the plurality of holes.