METHOD AND APPARATUS FOR PRODUCING HONEYCOMB CORE USING DOMED BONDING LAYER

• Main Author: SUGITA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 29.08.2019
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a method for producing a honeycomb core using a domed bonding layer, the method comprising, during bonding of cells, heating a bonding sheet with hot air and forming a uniform bonding layer on an end surface of each honeycomb cell, thereby providing a honeycomb core that has stable strength and is lightweight.SOLUTION: This invention relates to a method for producing a honeycomb core, wherein when bonding and molding a thermally-weldable bonding sheet with respect to a core material in which a plurality of ribs are connected mutually to constitute an aggregate of cells, the method employs a means comprising: a dome forming step of feeding upward hot air by pressure into the cells from a lower side to an upper side with respect to the flat bonding sheet laid on an upper surface of the core material, to thereby form a dome-shaped bonding layer on an upper surface of each of the cells; a rupturing step of feeding downward hot air by pressure from the upper side toward the vicinity of the apex of the dome-shaped bonding layer to rupture the bonding layer; and a thermally-welding step of forming a uniform bonding layer on upper surface edge parts of the cells by means of melting properties and surface tension.SELECTED DRAWING: Figure 1 【課題】ドーム化接着層によるハニカムコアの製造方法において、各セル同士の接着に際し、接着用のシートを熱風で加熱して各ハニカムセルの端面に均一な接着層を形成することによって、安定した強度を有し、軽量なハニカムコアを提供する。【解決手段】ハニカムコアを製造する製造方法であって、複数のリブが連接してセルの集合体を構成する芯材に熱溶着性の接着シートを用いて接着成形する際、前記芯材の上面に敷設した平坦な前記接着シートに対し、下方から上方に向かって前記セル内へ上昇熱風を圧送して各前記セルの上面にドーム状の接着層を形成させるドーム化工程と、上方から前記ドーム状の接着層の頂点近傍に向かって下降熱風を圧送して破断させる破断工程と、溶融性と表面張力を利用して前記セルの上面縁部に均等な接着層を形成する熱溶着工程と、を有する手段を採用した。【選択図】図１