Electrically Conductive Spherical Mold Carrier for Rotational Molding

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing rotary casting methods are inefficient and complex, as they require heating the entire device in a furnace, wasting energy by heating non-essential parts along with the casting negative mold.

Innovation Solution

A ball rotation method where the spherical receiving device is designed to be at least partially electrically conductive, allowing electrical energy to heat the cast negative mold directly through an electric current, avoiding the need to heat the entire device and enabling targeted heating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the entire rotation casting device is brought into a heating chamber, then the cast negative mold can be heated to melt the starting material, but a large number of other parts are also heated unnecessarily, resulting in high energy consumption and complex device structure

Engineering Contradiction:

Improveheating temperature of cast negative moldVSAvoidenergy consumption

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The invention extracts the heating function from the entire rotation casting device and applies it only to the cast negative mold. Electrical heating elements are integrated directly into the spherical receiving device, allowing selective heating of only the mold and starting material without heating the entire device structure, thereby significantly reducing energy consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The heating system is designed with local quality by placing heating elements specifically at the location of the cast negative mold within the spherical receiving device. This ensures that thermal energy is concentrated where needed (in the mold and starting material) rather than being distributed throughout the entire device, optimizing energy efficiency.

Inventive Principle:

Principle #3Local quality

2Temperature

If the entire rotation casting device is brought into a heating chamber, then the cast negative mold can be heated, but the device structure becomes very complex

Engineering Contradiction:

Improveheating temperature of cast negative moldVSAvoiddevice structure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The invention merges the heating function with the spherical receiving device by integrating electrical heating elements directly into the ball structure. This combination eliminates the need for separate external heating chambers and complex heating mechanisms, simplifying the overall device structure while maintaining effective heating capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention replaces the mechanical heating system (external heating chamber) with an electrical heating system integrated into the spherical receiving device. This substitution simplifies the device structure by eliminating the need for large external furnaces and complex mechanical heating mechanisms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Loss of energy

If electrical energy is conducted through the spherical receiving device, then the cast negative mold can be heated efficiently, but the spherical receiving device must be designed to be electrically conductive

Engineering Contradiction:

Improveenergy efficiencyVSAvoidmanufacturing complexity of spherical receiving device

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The invention changes the electrical conductivity parameter of the spherical receiving device by using electrically conductive materials (such as metals) or by applying conductive coatings to non-conductive materials. This parameter change enables the device to efficiently conduct electrical energy for heating while maintaining manufacturing feasibility through the use of common conductive materials and coating technologies.

Inventive Principle:

Principle #35Parameter changes

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 approach allows for efficient and precise heating of the cast negative mold, reducing energy waste and enabling cost-effective, high-quality rotational molding.

Implementation Method 1

electrical energy is conducted through the spherical receiving device in such a way that an electric current flows through the spherical receiving device, the electrical energy is used to heat the at least one cast negative mold

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentEP2918386B1Method for manufacturing rotationally molded parts with a spherical mould carrier and device

Publication Date: 2017.07.19 ROTO EVOLUTION GMBH

Figure 1
Figure 2
Figure 3~4

AI summary

The invention relates to a ball rotation process for producing rotationally molded parts, in which a spherical holding device is rotated, containing at least one negative mold loaded with starting material. The ball rotation process is characterized in that the spherical holding device is at least partially electrically conductive and that, during the rotation process, electrical energy is passed through the spherical holding device in such a way that an electric current flows through it.