Thermally deposited portion structure of thermoplastic resin molded product

摘要

The deposition strength is enhanced in the thermally deposited portion of thermoplastic resin molded product. In addition, in the test for obtaining the deposition strength, the shape and dimensions that can reach the purposed deposition strength is defined. If the annular groove (21) for fixing the heating element (30) is installed to the periphery of the deposited portion of lower case (20) and the annular rib (11) is fitted into the annular groove (21) is installed to the deposited portion of upper case (10) and if the diameter of heating element (30) to be used is considered to be D, then (a) the interval L between both the lateral walls in the annular groove 21 shall be set to 1.3 D L 1.6 D (b) the wall thickness T of annular rib shall be set to 1.1 D T 1.2 D (c) the height A of outside lateral wall in the annular groove shall be set to A 2 D (d) the height B of inside lateral wall in the annular groove shall be set to B 2 D, and (e) the height H of annular rib shall be set to H A.