Mold, molding apparatus, production method of molded body, and molded body
The present invention relates to a mold including a master mold having a first region master mold molding surface having a shape corresponding to a first region of a molded body, and a second region master mold molding surface having a shape corresponding to a second region of the molded body, and in which the master mold includes: an inner mold having the first region master mold molding surface; an outer mold having an accommodating concave portion capable of accommodating the inner mold therein and the second region master mold molding surface on at least a part of an outer edge of the accommodating concave portion; and a buffer material provided between the inner mold and a bottom surface of the accommodating concave portion, the buffer material being pressed and deformed with relative movement of the inner mold and the outer mold.
1. A molded body which is a plate-like molded body having a first region and a second region provided on an outer periphery of the first region,
wherein a radius of curvature of the second region is smaller than a radius of curvature of the first region, and
when a main surface of the molded body on the side of a direction where the second region is bent relative to the first region is defined as a first main surface, and a main surface on an opposite side thereto is defined as a second main surface, in a top view of the molded body seen from the second main surface side, in a case where a long-side direction of the molded body is defined as an m-axis, a short-side direction orthogonal to the m-axis is defined an n-axis, a center of gravity of the molded body is defined as a central point (m,n)=(0,0), a long-side dimension of the molded body is defined as M, and a short-side dimension of the molded body is defined as N, a stress integral value S in a plate thickness direction on a line segment A joining a point (M/4,0) and a point (−M/4,0) and a line segment B joining a point (0,N/4) and a point (0,−N/4) is 0.1 MPa or more and 3.0 MPa or less.
2. The molded body according to claim 1 , wherein, in a case where a length of the first region in a short-axis direction is defined as L mm, and in the molded body, an arithmetic average roughness in a range of L/10 mm from an outer edge of the first region of the second main surface toward the central point is defined as Ra 1 , and an arithmetic average roughness of the second region is defined as Ra 2 , a relation of (Ra 1 /Ra 2 >1.1) is satisfied, and Ra 2 is less than 10 nm.
3. The molded body according to claim 1 , wherein the molded body is a cover member for protecting an object to be protected.
4. The molded body according to claim 1 , wherein the molded body is made of a glass.