Heating plug for loading and unloading plastic bottle blank by rotary lifting

Abstract

The invention relates to a heating plug for loading and unloading plastic bottle blank by rotary lifting, which comprises a machine body connected on a heater running mechanism. A core shaft is arranged in the machine body, the end of the core shaft is connected with the head of the plug, the outer wall of the head is provided with a mobile groove which is internally provided with an expanding sleeve, one end of the expanding sleeve is fixed by a limit block, and the inner side of the expanding sleeve is provided with an elastic ring. The heating plug is characterized in that the core shaft is provided with an upper check ring, a spring and a sliding sleeve, the sliding sleeve is connected with a shaft pin which is provided with a roller, a material pushing convex rail contacts with the roller, and the lower part of the machine body is connected with a blank unloading sleeve. The plug of the technical proposal automatically completes the loading and unloading of the bottle blank by the lifting of the core shaft, the whole part is arranged in the machine body, the structure is simple, and the mechanical running has accurate positioning and reliable effect.

Description

Technical field [0001] The invention relates to a rotary lifting loading and unloading plastic bottle preform heating plug, which belongs to the field of plastic machinery, and is mainly used for processing various hollow plastic containers such as mineral water bottles and oil bottles. Background technique [0002] Plastic hollow containers, such as mineral water bottles, oil bottles and cosmetic bottles, are processed by injection stretch blowing. The plastic raw materials are first injected into preforms (or bottle tubes), and then the preforms are heated, and then stretch blown by the stretch blowing machine. Molding, therefore, a plastic preform heater is required, and the preform heater has a plug to connect the preform. The head of the preform plug of the existing plastic preform heater is a cylindrical metal piece. When working, the plastic preform mouth is sleeved outside the plug head, and the inner wall of the preform mouth matches the outer wall of the plug head. With...

AI Technical Summary

Problems solved by technology

The head of the preform plug of the existing plastic preform heater is a cylindrical metal piece. When working, the plastic preform mouth is set outside the plug head, and the inner wall of the preform mouth and the outer wall of the plug head are matched to the plug. When the conveying mechanism runs and heats, the head of the plug does not have an adjustable tensioning device, so the preform tends to tilt or fall off during heating, which affects the heating quality of the plastic preform. Therefore, the inventor developed a head A plug with a movable ring and an elastic ring overcomes the above-mentioned defects, and has applied for a Chinese patent with the patent number ZL200520100879.3

However, in the production of plastic bottles, the fully automatic rotary stretch blowing machine requires the supporting heater to be able to automatically load and unload the preforms, and requires uniform heating on all sides of the preforms, and automatic loading of the preforms and the feeding mechanism. Coordination, fast speed, automatic detachment of the preform is beneficial to the manipulator to send the heated preform into the mold of the stretch blowing machine, so the existing plastic preform heating plug is not suitable for automatic loading and unloading of the preform and cannot achieve uniform heating Purpose

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