Mechanical sealing mechanism for bottle cap injection mold

Abstract

The invention discloses a mechanical sealing mechanism for a bottle cap injection mold, and belongs to the technical field of injection molds. The bottle cap injection mold comprises a mold core, a supporting plate and a lower shaft sleeve plate, wherein a cooling liquid inlet pipe is arranged in the cavity of the mold core, and the supporting plate is provided with a cooling liquid inlet channeland a cooling liquid return channel; and the bottle cap injection mold is characterized in that a mechanical sealing mechanism comprises a rotary fixing sleeve, a pressure ring, a movable ring, a fixed ring and a spring, wherein one end of the rotary fixing sleeve is fixed with the mold core, a spring cavity is formed at the other end of the rotary fixing sleeve, the pressure ring is sleeved on the mold core, the movable ring is sleeved on the mold core, the movable ring is provided with a movable seal ring at the side facing toward the pressure ring, the fixed ring is arranged in a mold corerotating cavity of the supporting plate, a static seal ring is arranged outside the fixed ring, one end of the spring is arranged in the cavity of the spring, and the other end of the spring is supported on the pressure ring. The mechanical sealing mechanism for the bottle cap injection mold has the advantages of being capable of avoiding leakage of the cooling liquid so as to ensure the mold core cooling effect, avoiding waste of cooling liquid and influence on the operating site environment, and being beneficial to protecting the bottle cap injection mold.

Description

technical field [0001] The invention belongs to the technical field of injection molds, and in particular relates to a mechanical sealing mechanism of an injection mold for bottle caps. Background technique [0002] Figure 4 Shown is a known bottle cap injection molding mold, including a core 1 for making the inner wall of the bottle form a bottle cap internal thread when the bottle cap is injection molded, a support plate 2 and a lower sleeve plate 3, on the core 1 A coolant inlet pipe 111 is provided in the core cavity 11 for cooling the core 1 so as to increase the forming speed of the bottle cap, and a coolant inlet channel 21 and a coolant return channel 22 are opened on the support plate 2 , the coolant inlet channel 21 communicates with the coolant inlet pipe 111 , and the coolant return channel 22 communicates with the core cavity 11 of the core 1 . After the coolant is introduced into one end of the coolant inlet pipe 111 by the coolant inlet passage 21, it enters...

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Problems solved by technology

[0003] Practice has proved that the sealing ability of the sealing mechanism of the bottle cap injection molding mold with the above structure is very weak, that is to say, it is not enough to be played by a pair of sealing rings 23. Satisfactory sealing effect, the coolant will leak from the end face of the core 1 and the mating surface 24 of the support plate 2 until it flows out from the joint surface 25 of the support plate 2 and the lower sleeve plate 3, on the one hand, it will affect the alignment The cooling effect of core 1, on the other hand, causes waste of coolant, and on the other hand, affects the working environment on the job site, and even damages the bottle cap injection molding machine

[0004] The applicant has done a document search, but in the published Chinese and foreign patent documents and non-patent documents, there is no relevant information about avoiding the leakage of cooling fluid for core cooling. The technical enlightenment, and there is no report of success in the industry so far

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