A mold for producing cylinder liners of twin-screw extruders

[0041] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 with Image 6 As shown, a mold for producing a twin-screw extruder barrel bushing of this embodiment includes an upper box and a lower box. The upper box and the lower box enclose a twin-screw The molding cavity 11 of the barrel bushing of the extruder; the inner wall of the molding cavity 11 is ∞-shaped, and the sharp corners of the ∞-shaped junction form a thick triangular area; the middle of the molding cavity 11 is provided with a twin screw mounting hole Molded mud core 9; the top middle of the molding cavity 11 in the upper box body is provided with a heating riser 7; the bottom middle of the molding cavity 11 in the lower box body is provided with a graphite chilled iron 8; the molding cavity 11 side is close to the front and rear ends The inner gate 6 is symmetrically arranged at the part, and the outer gate 1 communicating with the inner gate 6 and a pouring channel are simultaneously arranged on the up

[0045] Such as figure 2 , image 3 , Figure 4 , Figure 5 with Image 6 As shown, the mold for producing the barrel bushing of the twin-screw extruder in this embodiment, the pouring channel is a side-mounted pouring channel, and includes a straight runner 2 and a straight runner provided in the middle of one side of the molding cavity 11. The sprue 3, the runner 4, the common riser 5 and the inner gate 6, the bottom of the sprue 2 is provided with a sprue socket 3 with an arc bottom; the upper part of the sprue socket 3 Both sides are connected to the horizontal runner 4; the ends of the two runners 4 are respectively connected with a common side riser 5; the two common side risers 5 are respectively connected with two inner gates 6; Two ingates 6 are connected with the molding cavity 11. The sprue socket 3 and the runner 4 are covered with a filter screen, and the filter screen extends into the common side riser 5 to play a filtering role.

[0046] In this embodiment, the molte

[0048] Such as figure 1 with figure 2 As shown in the present embodiment, in a mold for producing a barrel bushing of a twin-screw extruder, the sprue 2 is a vertical cylindrical hollow pipe, and the sprue 2 is located in the upper box, and The runner 2 is arranged perpendicular to the molding cavity 11, and the bottom of the sprue 2 is located on the parting surface of the upper box; the molten metal inlet end of the sprue 2 is provided with a funnel-shaped outer gate 1.

[0049] In this embodiment, the molten metal is poured from the funnel-shaped outer gate 1, passes through the sprue 2 and flows into the sprue socket 3. The funnel-shaped outer gate 1 receives the molten metal from the ladle, prevents splashing and overflow, facilitates pouring, and reduces the direct impact of the molten metal on the sprue 2;