Flaskless Molding Machine Lower Squeeze Board Segmentation
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Solution Overview
Problem
Conventional flaskless molding machines face issues with the lower squeeze board inclining during the squeezing process, leading to uneven mold surfaces and instability in stripping the flasks due to a short stroke, which complicates the configuration and stability of the molds.
Innovation Solution
The solution involves a flaskless molding machine design with an ascendable and descendable lower squeeze board, a lower filling frame with independent cylinder actuation, and a cope flask with air-on-oil activation, eliminating the need for a stopper pin and simplifying the squeeze mechanism, allowing for stable horizontal mold surfaces and extended stripping stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a guide rod is provided to inhibit the inclination of the lower squeeze board, then the stability of the lower squeeze board is improved, but the device complexity increases and the guide rod may be deformed by compression force
Solution Approach 1:
The lower squeeze board is divided into a board body and a support portion, where the support portion is separately attachable to the board body. This segmentation allows the support portion to provide structural reinforcement without requiring additional guide rods, thereby maintaining stability while simplifying the overall configuration.
Solution Approach 2:
The support portion is pre-designed with a specific structure that can be attached to the board body before the molding process. This preliminary preparation ensures that the lower squeeze board has the necessary structural support built-in, preventing inclination during compression without requiring additional complex components during operation.
2Stability of the object's composition
If the stroke of stripping the flasks is made equal to or greater than the thickness of the match plate, then the stability of stripped flasks is improved, but the maximum length of the cope flask stripping stroke is constrained by the match plate thickness
Solution Approach 1:
The flask stripping mechanism utilizes vertical movement in addition to horizontal movement. By coordinating the ascending motion of the lower squeeze board with the stripping action, the system achieves extended stripping stroke beyond what would be possible through horizontal movement alone, thereby stabilizing the stripped flasks without increasing the match plate thickness constraint.
3Ease of operation
If the lower squeeze board is made descendable to retract flasks, then the stripping process is enabled, but the bottom surfaces of the molds become inclined relative to the horizontal plane
Solution Approach 1:
By separating the lower squeeze board into a board body and a support portion, the system maintains the horizontal position of the board body during descent, ensuring precise mold bottom surfaces while enabling the support portion to perform the flask retraction function.
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 design ensures stable horizontal bottom surfaces of the molds and simplifies the configuration by enhancing mechanical stiffness and eliminating the need for a stopper pin, achieving reliable flask stripping with increased stroke length and improved mold quality.
Implementation Method 1
a lower filling frame provided with molding-sand introducing ports on the surfaces of the sidewalls and being connectable to the lower end of the drag flask to allow the lower filling frame to ascend and descend
Implementation Method 2
a cope flask provided with molding-sand introducing ports on the surfaces of the sidewalls and being mountable on the match plate to allow the cope flask to ascend and descend
Data Source
Figure 1
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AI summary
A molding process and a flaskless molding machine for simultaneously making an upper flaskless mold and a lower flaskless mold are provided such that the bottom surfaces of the molds can be in a stable and horizontal position, the stripping of the flasks can be reliably carried out, and the configuration of the molding machine can be simplified. The process comprises the steps of defining a lower molding space by a drag flask that is arranged to enter or leave a molding space in which molds are made, a match plate having patterns on the upper and lower surfaces and mounted on the upper surface of the drag flask, a lower filling frame provided with molding-sand introducing ports on the surfaces of the sidewalls and being connectable to the lower end of the drag flask to allow the lower filling frame to ascend and descend, and an ascendable and descendable lower squeeze board, the step also defining an upper molding space by a cope flask provided with molding-sand introducing ports on the surfaces of the sidewalls and being mountable on the match plate to allow the cope flask to ascend and descend, and an upper squeeze board that is opposed to and fixedly provided above the match plate; simultaneously introducing molding sand into the upper molding space and the lower molding space; squeezing the molding sand by raising the lower squeeze board to simultaneously make an upper mold and a lower mold; drawing the upper mold from the pattern on the upper surface of the match plate, while drawing the lower mold from the pattern on the lower surface of the match plate; and stripping the upper mold from the cope flask, while stripping the lower filling frame from the lower mold.