Flangeless Roller Mold Turnover Wear Reduction
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Solution Overview
Problem
Conventional mold turning devices in tight flask molding lines experience rapid wear of turning over wheels and supporting rollers due to increased speed, leading to frequent maintenance needs and high replacement costs.
Innovation Solution
The device features flangeless supporting rollers that abut the side surfaces of turning over wheels, arc-shaped contact surfaces to prevent rubbing wear, and spring-propelled scrapers for continuous tread surface cleaning, along with a driving roller system adjusted by an air cushion for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transportation speed of flasks is increased to shorten the cycle time, then the productivity is improved, but the turning over wheels and supporting rollers experience rapid wear
Solution Approach 1:
The patent changes the geometric parameters of the supporting rollers by removing the flange structure. This parameter change eliminates the rubbing contact between the flange and turning over wheel, thereby reducing wear while maintaining the ability to prevent downstream movement through alternative means (abutment against the turning over wheel's side surface).
Solution Approach 2:
The patent extracts and removes the flange structure from the supporting rollers. This extraction eliminates the harmful rubbing action that caused rapid wear, while the core function of preventing downstream movement is preserved through the modified support configuration where the roller body itself abuts the wheel.
2Reliability
If fixed-type scrapers are used to clean the tread surface, then the cleaning effect is maintained initially, but frequent maintenance is required as they wear away
Solution Approach 1:
The patent transitions from fixed-type scrapers to swing-type scrapers that can dynamically adjust their position. The scrapers are hinged to allow automatic adjustment of the contact point with the tread surface, maintaining effective cleaning contact even as wear occurs, thereby reducing maintenance frequency while preserving cleaning effectiveness.
3Reliability
If the turning over wheels are held in the device during operation, then the flask is securely held, but the turning over wheels cannot be easily replaced
Solution Approach 1:
The patent segments the supporting roller into a removable body portion and a fixed mounting portion. This allows the roller body to be easily detached and replaced, while the mounting structure remains fixed to maintain holding stability during operation. The segmented design enables quick wheel replacement without compromising operational reliability.
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 configuration reduces wear on turning over wheels and supporting rollers, minimizes maintenance, and lowers replacement costs by preventing movement and wear during high-speed operations, ensuring consistent performance without frequent maintenance.
Implementation Method 1
a scraper, which is propelled by a spring, is housed in each bracket of the scrapers for cleaning the tread surfaces
Data Source
AI summary
A device for turning over molds is provided that can reduce the wear of turning over wheels and supporting rollers even when the speed for transporting a flask or the speed for turning it over increases. A pair of turning over wheels (5) are attached to respective sides of a turning over roller conveyor (4), on which a metal flask (3) is mounted. The outer surfaces of the wheels are supported by respective pairs of supporting rollers (6). A driving roller (9) is provided on one or both of the wheels. The supporting rollers are flangeless. Two pairs of side rollers (10) abut the side surfaces of the wheels so as to prevent them from moving in the direction in which the flask is transported. The side rollers are preferably configured so that their surfaces that contact the wheels are formed as arcs.