| 摘要 |
PURPOSE: A method for manufacturing a pellet type thermoplastic resin foaming agent is provided to continuously form a pellet type thermoplastic resin foaming agent from resin material without a forming process of an additional foaming medium matter and improve a manufacturing performance of a foaming agent by mixing and pressing out a thermoplastic resin and a foaming agent and continuously foaming/forming the thermoplastic resin and foaming agent as a pellet type. CONSTITUTION: A die(1) is formed as a cylinder shape. A torpid(2) is located at inner central portion of the die(1) and forms a plurality of resin flowing paths(3) between the outer circumferential surface thereof and a body inner circumferential surface of the die(1). A plurality of pressing out holes(4) are formed on the cylinder-shape body of the die(1) toward a radius direction along each resin flowing path(3). Resin being pressed out through the pressing out holes(4) is cut and formed continuously as a predetermined size of pellet type resin foaming agent at a portion of the pressing out holes(4). A guide is formed at the outer circumferential surface of a length direction of the die(1) based on the pressing out holes(4). Operation members(5) are inserted along a guide. The both ends of a cutting knife(10) are fixed at the upper corner of surfaces corresponded thereto of the operation members(5). A center of a width direction of the cutting knife(10) is contacted toward a tangent line direction of the pressing out holes(4). The cutting knife(10) includes a plurality of penetration holes(12) which are connectively formed to the pressing out holes(4) along a length direction thereof.
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