90-degree large bending rotating core pulling pipe fitting mold with inverted part

Abstract

A 90-degree large bending rotating core pulling pipe fitting mold with an inverted part comprises a fixed mold plate, a movable mold bottom plate and a movable mold plate; a 90-degree bend pipe fitting is arranged between the movable mold plate and the fixed mold plate; the inverted part is arranged on a connector of the 90-degree bend pipe fitting; a 90-degree large bending core and a connector core are arranged in the inner wall; the connector core is driven by a straight pulling mechanism to perform core pulling; an inverted demolding mechanism is arranged on the connector core; the 90-degree large bending core is connected with a linkage rod which is connected with the straight pulling mechanism; a rotating plate is arranged on the movable mold bottom plate; the whole straight pulling mechanism is arranged on the rotating plate; an arc-shaped large bending rack is installed on the bottom face of the rotating plate; a motor is installed on the movable mold bottom plate; a gear on the motor is meshed with the arc-shaped large bending rack; the inverted demolding mechanism comprises a fixing hole formed in the connector core and provided with an opening; a fixing strip is installed in the fixing hole; an I-shaped inclined slide groove is formed in the fixing strip and provided with an inverted insert; the inverted insert is provided with an inverted mold cavity; and the inverted mold cavity is matched with the inverted part.

Description

technical field [0001] The invention relates to a 90° large-bend rotating core-pulling pipe fitting mold with an undercut, which belongs to the field of plastic molds. Background technique [0002] Plastic molds are used to produce plastic pipe fittings, such as elbow pipe fittings. Most of the inner core pullers of the elbow adopt an insert splicing swing structure or a chute oblique sliding structure. The insert splicing swing structure is mainly suitable for small bends (within 45°), and the swing range should not be too large, otherwise it will affect the stability of the insert splicing; the inclined slide structure of the chute is suitable for various elbows. But in actual use, especially a 90° large elbow, on the one hand, because the bend of the elbow is 90°, the slope of the chute is large, and the spring used for the oblique sliding needs to bear a large inclination. Sliding pressure, it is easy to shorten the service life of the spring, it needs to be replaced no...

AI Technical Summary

Problems solved by technology

But in actual use, especially a 90° large elbow, on the one hand, because the bend of the elbow is 90°, the slope of the chute is large, and the spring used for the oblique sliding needs to bear a large inclination. Sliding pressure, it is easy to shorten the service life of the spring, it needs to be replaced normally, and it is troublesome to disassemble and assemble when the mold is stopped, which affects the production efficiency; It is more difficult to pull the core with big curved core

Moreover, the above-mentioned core-pulling structures are all driven by oil cylinders, and the oil cylinders extend out of the mold body, increasing the mold volume, making the molds only processed by large injection molding machines, and increasing equipment investment costs

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