One-way valve used for injecting device

Abstract

The invention relates to a valve, and discloses a one-way valve used for an injecting device. The one-way valve used for the injecting device comprises a valve body. The valve body is connected to an injection molding barrel and is arranged between a threaded rod and an air cylinder. A valve seat is arranged inside the valve body. A valve core is arranged on the valve seat. A valve rod penetrating through the valve body is connected to the valve core. A first opening and a second opening are formed in the position, below the valve seat, of the valve body. A stressed plate is connected in the position, between the first opening and the valve seat, of the valve body in a sliding mode. A sealing cover is hinged to the stressed plate, and a torsional spring is arranged in the hinged position of the stressed plate and the sealing cover. A limiting block is arranged below the sealing cover. A first gear rack is connected to the inside of the openings in a sliding mode. A first elastic piece is connected between the first gear rack and the valve body. The first gear rack is engaged with a gear. The gear is engaged with a second gear rack which is connected to the second opening in a sliding mode. Compared with the prior art, when injection molding rubber is squeezed through the air cylinder, by arranging the one-way valve, part of the injection molding rubber is prevented from being squeezed to the threaded rod, and the injection molding rubber cannot exert acting force on the threaded rod, so that damage to the threaded rod is reduced, and the service life of the threaded rod is prolonged.

Description

technical field [0001] The invention relates to a valve, in particular to a one-way valve used in an injection device. Background technique [0002] There are many methods of plastic molding, but the injection molding method is the most common. Especially in recent years, the continuous research and improvement of the molding machine has changed from manual, semi-automatic to fully automatic. There are different forms of forming machines to adapt to different working conditions. Even in forming machines of the same specification, the forms are different due to the different designs of various manufacturers. [0003] In general, the basic structure of a general-purpose injection molding machine includes three parts, namely, the injection device, the mold clamping device (mold clamping and demoulding device), and the hydraulic transmission and electrical control system. The injection device is the heart of the injection molding machine. It is to ensure that the material is he...

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Problems solved by technology

[0004] Injection devices that can meet these requirements mainly include plunger type, plunger-screw type, screw type, etc. Among them, the screw type injection device includes an injection molding cylinder, which is connected with a hopper, and a screw 15 is arranged inside the injection molding cylinder. The left side of the injection molding cylinder is provided with a cylinder 16, such as figure 2 As shown, when the screw 15 transports the plastic to the cylinder 16, when the amount of plastic reaches a certain amount, the screw 15 stops rotating, starts the cylinder 16, and the cylinder 16 injects the plastic into the mold, and because the screw 15 is adjacent to the cylinder , when the cylinder is extruding plastic, part of the plastic will be extruded on the screw 15 and exert pressure on the screw 15, causing damage to the screw 15 and reducing the service life of the screw 15

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