| 摘要 |
An extrusion mold and a manufacturing method for a composite plate material formed by coextrusion of a wood plastic, a foaming layer, and a metal section. The extrusion mold (3) comprises a mold body (31) and a first mandrel (34). A mold cavity and a shaping cavity flow channel gap (33) for a molten wood plastic to flow are formed on the mold body (31). The first mandrel (34) is provided in the mold cavity. The first mandrel (34) is provided with a shape and structure fitting an opening-shaped metal section (2). The shaping flow channel gap (33) used for the molten wood plastic material to flow also is provided between the surface of the metal section (2) and the mold (3). The extrusion mold (3) is provided with a foaming layer flow channel (35). The foaming layer flow channel (35) sequentially runs through the mold body (31), the shaping flow channel gap (33), and the first mandrel (34) to an outlet extremity of the extrusion mold (3) and enters a first cavity for foaming, thus forming the foaming layer (4). As such, the wood plastic, and the foaming layer form one composite whole, thermal insulation and soundproof performances of the composite plate material are enhanced, and excessive flow of the molten wood plastic fluid into the first cavity is prevented. |
