(1) Material feeding preheating process (Fig. 4(a))
The laminated material 5 is placed on the formed material pressing plate 10c and preheated. The outer edge 5a of the laminated material 5 is placed on the top surface of the thin-walled part 10c-2 of the formed material pressing plate 10c and stored. (2) Drawing process (Fig. 4(b))
The drawing process is then carried out by aligning the moulds of the upper 10a and lower 10b moulds. The laminated material 5 reaches the product end face forming surface 10b-3 and the desired product end face is formed. (3) Trimming process (Fig. 4(c))
Afterwards, as a trim process for the laminated material 5 that has protruded outside the cavity 9a, the burr push-off surface 10b-4 of the lower die 10b is made to penetrate the inside of the through-hole 10c-1 of the material to be formed squeezing and pressing plate 10c, and to fit inside the side wall 10a-1 of the upper die. The burr push-off surface 10b-4 of the lower die 10b is made to fit inside the upper die side wall 10a-1. (4) Forming process (Fig. 4(d))
Next, in succession to the trimming process described above, a compression moulding process is carried out by pressurising and heating the laminated material 5 in cavity 9a after the trimming process. (5) Demoulding process (Fig. 4(e))
Following the moulding process, a demoulding process is carried out to remove the product 5b.
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