SU1320075A1 - Mould for making polymeric articles - Google Patents

Abstract

The invention relates to injection molds for the manufacture of polymeric products. To ensure separate removal of the sprues and products, the mold is provided with a plate installed between the support 6 and the ejection plate 11 with the possibility of movement relative to their additional plate 12, in which the rods with the spurs 13 of the sprue are fixed. When the mold opens, the additional plate 12 remains stationary at the initial moment due to the retention of the gate in the matrix plate, and then begins to move the base plate, removing the gate from the matrix plate 3. After removing the products from the punches 8, the removal plate 9 removes the gate from the rods with delays 13. 4 Il. 14SO ND O O SP Figure 1

Description

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The invention relates to the processing of plastics and can be used in the manufacture of products from a layer of masses in molds with automatic separation of sprues installed on injection molding machines built into robotic complexes or rotary conveyor lines.

The purpose of the invention is to provide separate removal of gates and articles.

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Figure 1 shows the form in the closed position; figure 2 - form before removing the sprues; Fig. 3 shows the form after the products are pushed against the punches by the removal plate at the moment the product falls into the mold opening; in FIG. 4, the form during the collision of the gates from the rods with the grip of the gates by the removal plate.

The form comprises a fixed half-form including a fixing plate 1 with a sprue bushing 2, a plate 3 of dies with tunnel inlets 4 and diverting sprues 5, a movable half-form including a base plate 6, a plate of 7 punches with punches 8, a plate of removal 9 connected by pushers 10 with an ejection plate 11, an additional plate 12 in which the rods with the grippers 13 of the sprue are fixed. A shank 14 is fixed in the ejection plate. An additional plate 12 is installed between the ejection plate 11 and the base plate 6 with the possibility of movement relative to them. In the plate 3 matrix gating channels 15 are made.

The form works as follows.

After being filled with the melt, aged under pressure and cooled, the mold is opened. In this case, the products are detached (cut off) from the sprues in the zone of the tunnel inlet channels 4 and removed from the nests of the plate 3 of the matrix.

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The sprue and rods with grips 13 of the sprue along with the additional plate I2 move relative to the rest of the movable half-form up to 5 moment of contact of the additional plate 12 with the base plate 6, after which the stubs with the grips 13 sprues stop and pull the gating system 15 out of the gating sleeve and plate 3 matrices.

The ejection of the products is carried out by the removal plate 9, which receives the force from the shank 14 through the ejection plate 11 and the pushers 10 after the shank 14 contacts the stop of the molding machine. After removal of the products, the removal plate continues to move and pushes the sprue from the rods with the grips 13.

In this way, a separate and sequential extraction of the products and sprues from the mold is carried out (the products are first removed, then the sprues).

Claims (1)

Invention Formula A mold for the manufacture of polymer products, containing a fixed half-form, including a mounting plate with a sprue bushing, a matrix plate with tunnel inlet gating channels, a fixed half-form, including a base plate, 35 punch plate, punch plate associated with pusher pushers, and sprue gripper rods, characterized in that, in order to provide separate removal of gates and products, the form is fitted with a movable plate between pusher plate and base plate. relative to them an additional slab .in which 5. Secured rods with sprues grippers. thirty Sh Editor M.Tovtin Compiled by V.Shuralev Tehred A. Kravchuk Order 2564/15 Circulation 564 Subscription  BNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design,. four Proofreader T. Kolb