Molded Product Production Device Release Agent Application

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Solution Overview

Problem

Conventional molded product production devices face quality defects and reduced productivity due to the inability to prevent molding material adhesion to the inner surfaces of the molding die, especially when using materials with high adhesive properties or high shrinkage ratios.

Innovation Solution

A molded product production device with a lower punch having a release agent holding portion and a supply mechanism that applies the release agent to both the punch surfaces and the inner cavity surfaces, ensuring uniform coverage and preventing material adhesion during the compression molding process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a release agent is applied only onto the lower and upper punch surfaces by spraying from a nozzle, then the application process is simple, but the molding material adheres to the inner circumferential surface of the molding die causing quality defects

Engineering Contradiction:

Improverelease agent application processVSAvoidmolded product quality

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The release agent is applied to the inner circumferential surface of the molding die before the molding material is supplied into the cavity. This preliminary application prevents adhesion from occurring in the first place, eliminating quality defects while maintaining process simplicity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The inner circumferential surface of the molding die acts as an intermediary surface that requires release agent coverage. By applying the release agent to this surface, the patent creates a protective barrier between the molding material and the die, preventing direct contact and adhesion

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If the release agent is applied to prevent adhesion, then molded product quality improves, but productivity decreases due to additional application steps

Engineering Contradiction:

Improvemolded product qualityVSAvoidproduction efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The release agent application to the inner circumferential surface is merged with the existing punch surface application process. The same nozzle system is used to apply release agent to multiple surfaces (punch surfaces and inner circumferential surface) in a single operational sequence, preventing quality defects without significantly impacting productivity

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If molding material with high adhesive property is used, then product performance improves, but adhesion to die surfaces increases causing defects

Engineering Contradiction:

Improvemolding material adhesive propertyVSAvoidmolded product quality

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The release agent is applied to the inner circumferential surface before the high-adhesive molding material contacts it. This preliminary anti-action creates a protective barrier that counteracts the high adhesive properties of the molding material, preventing adhesion to the die surfaces while allowing the material to maintain its desired adhesive characteristics for bonding purposes

Inventive Principle:

Principle #9Preliminary anti-action

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

This solution enables the production of high-quality molded products with improved productivity by effectively preventing material adhesion to the inner cavity surfaces, reducing defects such as cords and cracks.

Implementation Method 1

the lower punch release agent holding portion transfers the release agent held thereto to the inner circumferential surface defining the cavity as the lower punch moves inside the cavity

Methodology Applied

Scientific EffectAdhesion prevention: Lubrication

Data Source

PatentUS8888477B2Molded product production device

Publication Date: 2014.11.18 SUMITOMO BAKELITE CO LTD

AI summary

A molded product production device that includes a molding die having an inner circumferential surface defining a cavity with upper and lower openings, the cavity into which the molding material is to be filled, a lower punch provided so as to be inserted into the cavity from the lower opening thereof and vertically move, the lower punch having a lower punch surface and a lower punch release agent holding portion which is provided at a lower side of the lower punch surface and capable of holding a release agent, an upper punch provided so as to be inserted into the cavity from the upper opening thereof and vertically move, the upper punch having an upper punch surface, and a lower punch release agent supply means which supplies the release agent to the lower punch release agent holding portion when being exposed outside the cavity.