Height-Adjustable Molding Device for Thermoplastic Recipients

Solution Overview

Problem

Existing molding devices for thermoplastic containers, such as PET bottles, face inefficiencies in material usage and machining time when adapting to manufacture containers of varying heights, as they require significant material removal and time for machining shorter shells, leading to waste and increased costs.

Innovation Solution

The solution involves providing reinforcing means on the internal faces of shell holders for non-cooperating parts, allowing shorter shells to be used while maintaining radial support, which can be achieved through strips, ribs, or semi-tubular portions, enabling the production of containers of different heights with reduced material usage and machining time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If shells of varying heights are used to manufacture containers of different heights, then the adaptability of the molding device is improved, but significant material removal and machining time are required for shorter shells

Engineering Contradiction:

Improveability to manufacture containers of varying heightsVSAvoidmachining time for shorter shells

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The shell holder is divided into two functional parts: a fixed support portion and a removable reinforcing means portion. The reinforcing means (strips, ribs, or semi-tubular portions) can be detached when not needed, allowing the shell holder to be used with full-height shells without requiring permanent reinforcement structures for all shell heights.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing means is designed to be dynamically adjustable - it can be installed on the shell holder when manufacturing shorter containers and removed when manufacturing full-height containers. This dynamic configuration allows the same shell holder to adapt to different shell heights without permanent modifications.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If shells of varying heights are used to manufacture containers of different heights, then the adaptability of the molding device is improved, but material waste increases

Engineering Contradiction:

Improveability to manufacture containers of varying heightsVSAvoidmaterial waste from machining shorter shells

Core Design Contradiction:

Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The shell holder is divided into two functional parts: a fixed support portion and a removable reinforcing means portion. The reinforcing means (strips, ribs, or semi-tubular portions) can be detached when not needed, allowing the shell holder to be used with full-height shells without requiring permanent reinforcement structures for all shell heights.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing means is designed to be disposable or reusable - when not needed for full-height shells, it can be removed and stored. This allows the same shell holder to serve multiple purposes without requiring permanent reinforcement structures, thereby reducing material waste.

Inventive Principle:

Principle #34Discarding and recovering

3Strength

If reinforcing means are provided on shell holders for non-cooperating parts, then the structural integrity is maintained for shorter shells, but the device complexity increases

Engineering Contradiction:

Improveradial support for shell holder parts not cooperating with shellsVSAvoidstructure of shell holder with reinforcing means

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The shell holder is divided into two functional parts: a fixed support portion and a removable reinforcing means portion. The reinforcing means (strips, ribs, or semi-tubular portions) can be detached when not needed, allowing the shell holder to be used with full-height shells without requiring permanent reinforcement structures for all shell heights.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing means is applied locally only to the specific portions of the shell holder that require additional support when shorter shells are used. The reinforcing elements (strips, ribs, or semi-tubular portions) are positioned at the non-cooperating parts of the shell holder to provide targeted radial support where needed.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS7563089B2Height-adjustable molding device for molding thermoplastic recipients of various heights

Publication Date: 2009.07.21 SIDEL PARTICIPATIONS SAS

AI summary

The invention relates to a molding device for blowing thermoplastic recipients of various heights, said device comprising a mould provided with two mould halves and a mould bottom which are mutually mobile. Each mould half comprises a mould carrier, a chill carrier and a chill, said two chills and the mould bottom comprising mould impressions, which together define a molding cavity. The inventive device also comprises means for compensating the blowing pressure, said means being provided between a mould carrier and the associated chill carrier. For recipients with the maximum height, the chill carriers and chills are the same height. For lower recipients, the chills are lower than the chill carriers and radially reinforcing means are provided on the internal faces of the carriers in the parts thereof which do not co-operate with the chills.