All-electric dual-cylinder linkage injection unit

Abstract

An all-electric twin-cylinder linkage injection unit, consisting of two sets of injection units with the same structure, each injection unit includes a material cylinder (9), a piston (8), a feed pipe (10) and a discharge pipe (11) , the piston is connected with the ball screw nut (5) through the connecting sleeve (7), the lower end of the ball screw shaft (4) is connected with the precision planetary gearbox (2) through the bearing seat (3), and the latter is connected with the servo motor (1 ) to extend out the shaft connection, fix the upper cross plate (13) of the material cylinder (9) and the lower cross plate (15) of the fixed bearing seat (3), and the slide plate (6) between the two cross plates (13,15) ) are parallel to each other, and the left and right sides of the three have guide posts (14) that also serve as connecting rods. The present invention has the advantages of small size, few pipelines, long service life, energy saving, no noise, high precision, accurate injection volume, material saving, and high-quality products. Stable quality, continuous long-term feeding and super-large or small-capacity feeding, suitable for both injection molding and extrusion molding.

Description

technical field [0001] The invention relates to an injection device for injection molding of liquid rubber, which uses alternately linked double cylinders as an injection unit. Background technique [0002] The single-cylinder liquid rubber injection device is used in rubber injection molding. There are problems such as small injection volume, difficulty in producing large products, and continuous injection. If the injection volume is to be increased, the capacity of the cylinder must be increased, resulting in a large volume of the whole machine. , Equipment investment is high. CN1951670 discloses the applicant's authorized patent technology of "liquid silicone linkage injection method and device". The device is driven by hydraulic pressure, has many pipelines, easy oil leakage, unsatisfactory service life, energy consumption and noise. Moreover, the driving of the hydraulic system cannot accurately control the injection volume, the precision is low, and the material devia...

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Problems solved by technology

[0002] The single-cylinder liquid rubber injection device is used in rubber injection molding. There are problems such as small injection volume, difficulty in producing large products, and continuous injection. If the injection volume is to be increased, the capacity of the cylinder must be increased, resulting in a large volume of the whole machine. , high equipment investment

CN1951670 discloses the applicant's authorized patented technology of "liquid silicone linkage injection method and device". The device is driven by hydraulic pressure, has many pipelines, easy oil leakage, unsatisfactory service life, energy consumption and noise

Moreover, the driving of the hydraulic system cannot accurately control the injection volume, the precision is low, and the material deviation is large. In order to prevent the product from being scrapped due to lack of material, it is necessary to increase the margin of the injected material, but this will increase the material pressure in the mold. As the temperature rises, the latter further promotes the boost, resulting in cracking and scrapping of the product

The only way to overcome it is to reduce thermal expansion by cooling down, but cooling down will affect production efficiency

On the other hand, the force exerted by the hydraulic system on the piston in the material cylinder is a relatively flexible driving force. When the raw materials in the material cylinder are at different temperatures, different storage times, different ingredient ratios, different internal pressures or different In this case, there will be some differences in the injection volume of the material, the precision is low, and the quality of the product is difficult to guarantee.

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