Mold capable of ejecting medical infusion bottle blanks by virtue of push sleeve

Abstract

The invention discloses a mold capable of ejecting medical infusion bottle blanks by virtue of a push sleeve. The mold comprises a tensioning mold core, a sprue mold core, a mold cavity and a Half block, wherein the tensioning mold core comprises a large end, a small end and a connecting part; the connecting part is arranged between the large end and the small end and has an annular slope surface; the Half block is arranged at one side, which is far away from the sprue mold core, of the mold cavity; the mold further comprises the push sleeve which is used for pushing out bottle blanks and sleeves the outer side of the tensioning mold core; and the sprue mold core, the mold cavity, the small end, the Half block and the push sleeve define a bottle blank molding cavity. The invention aims at providing a demolding-reliable mold capable of ejecting out the medical infusion bottle blanks by virtue of the push sleeve.

Description

technical field [0001] The invention relates to the field of molds, in particular to a push-sleeve ejector mold for medical transfusion bottle embryos. Background technique [0002] Chinese patent ZL201310278930.9 shows a PP large infusion suspension ring integrated preform injection mold, which includes a gate core, a bottom mold, a cavity, a die lip, a core sleeve and a core. There is a pouring melting cavity, the bottom of the pouring melting cavity is provided with a glue injection port, the lower part of the gate mold core is provided with a mold core matching surface; the bottom mold is equipped with a mold core matching groove, and the mold core matching groove is matched with the mold core matching surface. The cavity is set under the bottom mold, the upper part of the inner side of the cavity is provided with a cavity through hole, and the lower part of the inner side of the cavity is provided with a stepped groove; the inside of the die lip is provided with a die l...

AI Technical Summary

Problems solved by technology

The problem with this device is that the preforms cannot be ejected smoothly

Due to the characteristics of PP medical plastic products: low surface hardness, large shrinkage rate and easy deformation, poor impact strength, fast cooling speed, and large mold core force in the inner hole of the preform

The strength of the preform support ring is changed by the temperature change, and the core force of the inner hole of the preform is also changed by the temperature change. Since the multi-cavity mold requires extremely high cooling uniformity, when the temperature of each molding cavity is different, the strength of the support ring When the clamping force of the mold core is lower than the mold core, the product cannot be demolded, resulting in product clamping, equipment shutdown, production shutdown and mold maintenance

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