Compression spring connection power bidirectional T-shaped groove self-adaptive core-pulling structure and core-pulling method thereof

Abstract

The invention discloses a compression spring connection power bidirectional T-shaped groove self-adaptive core-pulling structure and a core-pulling method thereof. The core-pulling structure is applied to decomposition and composition core pulling of a mold core of a U-shaped elbow which has large slope and bending radius, and long straight line section of a bellmouth part, and comprises a U-shaped mold core, a sliding block and a limiting device. One end of the U-shaped mold core is opposite to a movable mold cavity, the other end of the U-shaped mold core is connected with the sliding blockand the limiting device; the sliding block is connected with an oil cylinder connector and the limiting device; and the oil cylinder connector is connected with an external oil cylinder. According tothe invention, the oil cylinder is matched with a linear spring for compression, and through opposite rubbing effect of a dovetail groove, the decomposed mold core is pulled step by step; and meanwhile, a petal block of the mold core moves left and right in a T-shaped groove of a guide base by utilizing the reverse acting force of the spring, so that the mold core performs self-adaptive compositemotion according to the shape of a plastic part, and the avoiding action of the whole mold core pulling and mold core insert is coherent. The structure has the advantages of small occupied space, simple structure, few parts, reliable movement, short plastic part production period and high efficiency and the like.

Description

technical field [0001] The invention relates to a core-pulling structure, which belongs to the field of injection molds, in particular to a self-adaptive core-pulling structure of a bidirectional T-slot with compression spring and power. Background technique [0002] In plastic material molding products, various elbow products are widely used to connect water supply and drainage pipes. In the current mold design, there are many core-pulling actions and molding methods used in the production of molds for various elbow products. However, due to the The core-pulling of the inner curved part is limited by the straight section of the socket part, so the rotation angle of the inner curved part is limited. In order to achieve the goal that the inner bending part can smoothly pull the core from the socket of the straight section, many elbow products have adopted the method of reducing the diameter of the inner bending part (that is, the diameter of the water) in the design, although...

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Problems solved by technology

[0002] In plastic material molding products, various elbow products are widely used to connect water supply and drainage pipes. In the current mold design, there are many core-pulling actions and molding methods used in the production of molds for various elbow products. However, due to the The core pulling of the inner curved part is limited by the straight section of the socket part, so the rotation angle of the inner curved part is limited

In order to achieve the goal that the inner bending part can smoothly pull the core from the socket of the straight section, many elbow products have adopted the method of reducing the diameter of the inner bending part (that is, the diameter of the water) in the design, although this can achieve the inner bending The purpose of reducing the part and increasing its rotatable angle is to achieve the goal of pulling the core from the socket of the connected straight section. However, the method of reducing the diameter of the inner curved part (that is, the diameter of the water) has a water flow reduction. The practical problems of small water pressure, increased water pressure, and prolonged water supply time. The actual processing result brought about by the extension is that the transmission power of the water supply source needs to be increased, that is, the output power of the water supply system needs to be increased, which increases the energy consumption. Consumption, which increases the cost of water supply facilities

[0003] Therefore, there is an urgent need for a structure that can solve the problem that the inner bending part of the plastic parts elbow is equal to the socket diameter of the straight section, and the core can be pulled smoothly, so as to solve the above practical problems and the burden of cost increase.

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