Rotary Compression Molding Dust-Proofing Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In rotary compression molding machines, powdery materials tend to fall and scatter due to centrifugal force, leading to dust accumulation and lubricating oil dispersion, which can damage the machine and reduce productivity.
Innovation Solution
A dust-proofing device with a sealing case and dust receiver is integrated into the lower punch retaining portion, featuring a rising outer wall, a recessed dust receiver, and a vertically downward wall to capture and contain powdery material and lubricating oil, preventing scatter and entry into the retaining bore.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotational speed of the molding machine is increased to improve productivity, then the number of produced molded products per unit time increases, but the powdery material is more likely to scatter around due to centrifugal force
Solution Approach 1:
The invention utilizes the centrifugal force that causes powder scattering and converts it into a beneficial effect by designing a sealing case with a downward slope that directs the scattered powder toward a collection groove. The centrifugal force that was harmful is now harnessed to move powder into the collection area, preventing it from entering the retaining bore while maintaining high rotational speeds for productivity.
2Reliability
If a conventional sealing case is used to prevent dust entry, then dust can be inhibited from entering the retaining bore, but the powdery material that falls onto the sealing case scatters around due to centrifugal force at higher rotational speeds
Solution Approach 1:
The sealing case is designed with different surface characteristics in different areas: the bottom surface has a downward slope that directs powder toward the collection groove, while the side walls provide containment. This local differentiation of surface quality allows the structure to simultaneously prevent dust entry and manage scattered powder effectively at high rotational speeds.
Solution Approach 2:
The invention adds a vertical dimension to powder management by creating a downward slope and a collection groove that extends below the main sealing case surface. This dimensional change provides a dedicated collection area that captures powder in the vertical direction, preventing horizontal scattering while maintaining the sealing function.
3Object-affected harmful factors
If the sealing case covers the lower punch retaining portion to prevent dust entry, then dust can be inhibited from entering, but the powdery material fallen onto the sealing case scatters around due to centrifugal force
Solution Approach 1:
The collection groove acts as an intermediary structure between the sealing case interior and the external environment. It captures and contains the powdery material that scatters due to centrifugal force, preventing it from reaching the retaining bore. The groove serves as a buffer zone that mediates between the harmful scattering effect and the critical retaining bore area.
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
The solution effectively inhibits the scatter of powdery material and lubricating oil, maintaining machine cleanliness and productivity by capturing dust and oil within the sealing case, thus reducing wear and tear and enhancing operational efficiency.
Implementation Method 1
The powdery material having fallen onto the sealing case is more likely to scatter around due to centrifugal force
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A rotary compression molding machine (1) comprising a lower punch retaining portion (33) disposed below a table (31) including die bores (4) and retaining a lower punch (6), and a dust-proofing device (8) comprising a sealing case (81) supported by the lower punch retaining portion (33) and including a bottom wall (811) that has an insertion bore (812) penetrated by the lower punch (6), faces an upward surface of the lower punch retaining portion (33), and includes a dust receiver (815) disposed outside the insertion bore (812) and configured to capture dust, and an outer wall (816) that rises from an outer edge of the bottom wall (811), has an upper end positioned higher in level than an upward surface of a circumferential edge of the insertion bore (812), and includes a returning part (817) projecting inward from the upper end or a portion adjacent thereto.