Plastic Dose Transfer Apparatus with Shaped End Zone
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Solution Overview
Problem
Existing apparatuses for compression-moulding plastics face challenges in transferring large, complex-shaped doses of plastics due to adhesive properties, leading to uneven distribution and defects in preforms and bottles, as well as potential damage to moulds and production cycle interruptions.
Innovation Solution
An apparatus with a transferring element that shapes the end zone of the dose to decrease its transverse dimension, allowing it to enter a die cavity without adhering to the walls, combined with a closing mechanism for controlled transfer and a sensor arrangement to ensure timely and effective transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If doses of plastics with relatively large dimensions and complex shape are transferred to a die cavity, then the volume and shape requirements are met, but the doses adhere to the walls of the cavity and cannot position themselves correctly
Solution Approach 1:
The transferring element shapes the end zone of the dose in advance by decreasing its transverse dimension before the dose enters the die cavity. This preliminary shaping allows the dose to enter the cavity correctly without adhering to the walls, solving the positioning accuracy problem while maintaining the required volume.
2Ease of operation
If doses are transferred by gravity into the die cavity, then the transfer process is simple, but the doses adhere to the walls and produce unequal distribution of plastics
Solution Approach 1:
The end-forming arrangement creates a localized modification in the dose structure by decreasing the transverse dimension specifically at the end zone. This local quality change enables the dose to navigate the transfer process by gravity while preventing wall adhesion and ensuring uniform plastics distribution in the cavity.
3Volume of moving object
If doses protrude outside the cavity of the die, then the dose volume is maintained, but the die and punch cannot press against each other during moulding
Solution Approach 1:
By preliminarily shaping the end zone of the dose to have a decreased transverse dimension, the invention ensures that the entire dose fits within the die cavity during the moulding process. This prevents protrusion that would interfere with die and punch contact, maintaining production cycle continuity while preserving the required dose volume for preform formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates the correct positioning and transfer of large, complex-shaped doses into die cavities, reducing defects and production issues while preventing mould damage, and enabling efficient and controlled transfer processes.
Implementation Method 1
The plastics that constitute the doses tend to adhere to the surfaces with which they come into contact, due to the physical state of the highly viscous liquid.
Implementation Method 2
if the dose is dropped through gravity into the die
Data Source
AI summary
An apparatus comprising a transferring element for transferring a dose of flowable material, said dose being provided with an elongated body having a transverse dimension and an end zone, a receiving member for receiving said dose from said transferring element, wherein said transferring element comprising an end-forming arrangement for forming said end zone in such a way as to decrease said transverse dimension in the vicinity of said end zone. A dose of plastics comprises an elongated body provided with a transverse dimension, said elongated body comprising an end zone provided with a respective transverse dimension that is less than said transverse dimension.