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Apparatus for transferring doses and dose

A technique of dosage and tools, applied in the field of devices for forming preforms, can solve problems such as damage model-driven equipment, uneven distribution of plastics, and inappropriate

Inactive Publication Date: 2012-02-22
SACMI COOP MECCANICI IMOLA SOC COOP A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This creates an uneven distribution of the plastic in the cavity, which can cause defects in the preform and thus also in the bottle
[0005] Moreover, part of the dose may even remain outside the mold cavity, thereby protruding and preventing the mold and punch from pressing each other during the molding phase
Not only can this result in scrap production and stopping the production cycle to clean the scrap material off the model, but it can also damage the model and its drive equipment
[0006] The known devices are thus not suitable for handling doses of larger size, such as for example for obtaining preforms of bottles

Method used

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  • Apparatus for transferring doses and dose
  • Apparatus for transferring doses and dose
  • Apparatus for transferring doses and dose

Examples

Experimental program
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Effect test

Embodiment Construction

[0059] figure 1 Apparatus 1 is shown for conveying a dose D of plastic, such as polyethylene terephthalate polyester (PET), to a molding device 20 for forming preforms which can be molded by stretch blow molding Obtain a container, such as a bottle.

[0060] The dose D is dispensed by a dispensing tool 10 comprising a plastic extruder provided with an outlet 11 through which the highly viscous liquid plastic exits. A cutting tool, not shown, is also provided for cutting the plastic exiting the outlet 11 to define the dose D.

[0061] The molding apparatus 20 comprises an endless conveyor 26 rotatable about a vertical axis and supporting a plurality of molds, each mold comprising a mold 21 and a punch not shown. Each mold 21 comprises a lower part in which a cavity is obtained, said cavity having a substantially cylindrical shape with a curved bottom, and an upper part having a through hole provided with a neck suitable for forming a platform with an undercut Radial protrusi...

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PUM

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Abstract

An apparatus comprises: - transferring means (50) for transferring a dose (D) of flowable material, said dose (D) being provided with an elongated body (39) having a transverse dimension (M) and an end zone (19; 119; 219); - receiving means (21) for receiving said dose (D) from said transferring means (50); said transferring means (50) comprising end-forming means (18) for forming said end zone (19; 119; 219) in such a way as to decrease said transverse dimension (M) in the vicinity of said end zone (19; 119; 219). A dose of plastics comprises an elongated body (39) provided with a transverse dimension (M), said elongated body (39) comprising an end zone (19; 119; 219) provided with a respective transverse dimension (N) that is less than said transverse dimension (M).

Description

technical field [0001] The invention relates to a device for conveying doses of plastics to a forming device for forming preforms from which containers, in particular bottles, can be obtained. The invention also relates to the doses from which said preforms can be obtained. Background technique [0002] Apparatus for pressure molding plastic objects, such as bottle caps, are known which comprise a rotary molding carousel carrying a plurality of molds, each mold comprising a mold and a punch. During rotation, each mold receives a dose of plastic in a highly viscous liquid state. The doses are compressed between the mold and the corresponding punches during the travel of the molding carousel over one circular arc. The press step is followed by opening the mold and removing the molded article from the apparatus. [0003] Each dose is dispensed by means of an extrusion tool, to which is associated a conveying means, also having the shape of an endless conveyor, comprising a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C31/04B29C43/08B29C43/34B29C69/02B29B11/12B29B11/14B65G47/38
CPCB29C31/048B29C47/0057B29C2043/3433B29C47/004B29B2911/14106B29C2043/3472B29C43/34B29B2911/1402B29C47/0038B29C2043/3461B29C2043/3288B29K2105/253B29C47/0009B29B2911/14213B29B2911/1404B29C43/08B29B11/14B29B2911/14033B29B11/12B29C2043/3466B29C47/0054B29B2911/14026B29C48/03B29C48/001B29C48/0011B29C48/0017B29C48/0018B29C2949/26B29C2949/28B29C2949/24B29C2949/22B29C2949/3024B29C2949/3056B29C49/071B29C2949/0715
Inventor F·帕里内罗A·巴尔博尼M·博尔加蒂M·卡梅拉尼
Owner SACMI COOP MECCANICI IMOLA SOC COOP A R L