Moving block closed type anti-reflux device for injection molding extrusion head
A technology of extrusion head and closed type, which is applied in the field of injection molding extrusion head shifting closed anti-reverse device, which can solve the problems of poor anti-reverse effect, large resistance in the direction of material streamline, and no positioning structure.
Inactive Publication Date: 2018-01-09
佛山市鹏威塑胶制品有限公司
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Problems solved by technology
[0002] The anti-reverse device of the extrusion head of the existing injection molding equipment is composed of two anti-reverse rings with flat end faces, which has many defects, such as 1. Due to the serious stocking of the end faces, the anti-reverse effect is poor; 2. Because there is no positioning structure , causing problems such as large resistance in the direction of material flow
Method used
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Embodiment Construction
[0016] Such as Figure 1 ~ Figure 3 As shown, a block-moving closed-type anti-reverse device for an injection extrusion head includes a barrel 10, a guide 20 and a pusher screw 30; the guide 20 is composed of a guide main part 21 on the left and a support block 22 on the right. The support block 22 is fixed on the side wall of the inner cavity of the barrel 10; the pushing screw 30 is arranged on the right side of the guide 20 and the left end surface of the pushing screw 30 abuts against the right end surface of the guide 20; the support block 22 A cylindrical groove-shaped central groove 200 is formed in the middle of the right end surface; a cylindrical groove-shaped central sliding groove 204 is formed on the left side of the central groove 200; a cylindrical groove-shaped driving groove is formed on the left side wall of the central sliding groove 204 203; a number of rectangular groove-shaped moving grooves 201 are evenly distributed on the side wall of the central groove...
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The invention discloses a moving block closed type anti-reflux device for an injection molding extrusion head. The anti-reflux device comprises a material cylinder, a guide part and a material pushingscrew rod; the guide part is composed of a left guiding main part and a right supporting block; the supporting block is fixed on the side wall of the inner cavity of the material cylinder; a cylindrical groove-shaped central groove is formed in the middle part of the right end face of the supporting block; a cylindrical groove-shaped central sliding groove is formed in the left side wall of the central groove; a cylindrical groove-shaped driving groove is formed in the left side wall of the central sliding groove; a plurality of rectangular groove-shaped moving grooves are uniformly distributed in the side wall of the central groove in a circumferential direction; the left ends of the moving grooves communicate with the central sliding groove, and the right ends of the moving grooves penetrate through the guide part to be arranged; rubber material passing grooves are formed leftwards in the left side walls of the outer side ends of the moving grooves in a penetrating mode; and closedmoving blocks for shielding the rubber material passing grooves are arranged in the moving grooves in a sliding mode. The anti-reflux device has the advantages of being simple and effective; and whenthe material pushing screw rod rotates, the closed moving blocks automatically open the rubber material passing grooves, when the material pushing screw rod stops rotating, the closed moving blocks automatically seal the rubber material passing grooves, so that the rubber material is prevented from flowing back into the material barrel.
Description
Technical field [0001] The invention relates to the technical field of injection molding equipment, in particular to a closed type anti-reversal device for the movement of an injection extrusion head. Background technique [0002] The anti-reverse device of the extrusion head of the existing injection molding equipment is composed of two non-reverse rings with flat end faces, which has many defects, such as 1. Due to the serious storage of materials on the end faces, the anti-reverse effect is poor; 2. Because there is no positioning structure , Causing problems such as large resistance in the direction of material flow. Summary of the invention [0003] The purpose of the present invention is to provide a closed anti-reversal device with simple structure and good anti-reverse effect. [0004] In order to achieve the above objective, the present invention provides a block-moving closed anti-reverse device for an injection extrusion head, which includes a barrel, a guide and a pushe...
Claims
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Inventor 杨勇
Owner 佛山市鹏威塑胶制品有限公司