一、引言 结构力学认为,内侧受均布载荷的矩形框架,拐角偏转角度θ=(qL_xL_y(L_x-L_y))/(24E1)(L_x≥L_y)。当L_x=L_y时,θ=0。当L_x=2L_y时,θ则为最大值。当L_x≥L_y时,会出现如图1虚线所示的变形。本文认为压铸模矩形套板类似于这种内侧受均布载荷的矩形框架,但作为承受载荷向外膨胀的压铸模镶块,受套 I. INTRODUCTION According to structural mechanics, the rectangular frame with uniform load on the inside, the deflection angle θ = (qL_xL_y (L_x-L_y)) / (24E1) (L_x≥L_y). When L_x = L_y, θ = 0. When L_x = 2L_y, θ is the maximum value. When L_x≥L_y, the deformation as shown by the dotted line in Fig.1 will appear. This paper argues that the die-cast rectangular plate is similar to the rectangular frame with uniform load inside, but as a die-cast die insert that expands outwardly under load,