Droplet Discharging Device Head Alignment
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Solution Overview
Problem
Conventional inkjet facilities experience misalignment of heads due to convection heat trapped in the narrow spaces between the heads, bases, and pack holders, leading to distorted alignment during the manufacturing of display devices.
Innovation Solution
A droplet discharging device design featuring a base with a head fixing region, a pack holder with guide pins and air clamps, and guide holders that allow for precise alignment and fastening of heads, minimizing heat transfer and enabling easy air supply for secure locking and unlocking, thus preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple heads are installed on a U-shaped base with narrow spaces, then the head pack structure is compact, but convection heat is trapped causing head alignment distortion
Solution Approach 1:
The base is divided into a U-shaped base and a separate pack holder that can be assembled together. This segmentation allows the pack holder to be positioned away from the U-shaped base, creating space for heat dissipation while maintaining the compact head pack structure. The guide pins and guide holders facilitate precise alignment during assembly of these segmented components.
Solution Approach 2:
Air clamps are introduced as intermediary components between the pack holder and the base. These air clamps provide a controllable fastening mechanism that allows the pack holder to be securely positioned without direct rigid contact, enabling thermal isolation while maintaining alignment precision through the intermediary air-actuated connection.
2Volume of moving object
If the pack holder is closely positioned to the base, then the overall device size is reduced, but heat transfer causes misalignment of heads
Solution Approach 1:
The pack holder is extracted from direct contact with the base and positioned separately, connected only through guide pins and air clamps. This extraction removes the heat transfer path between the base and pack holder, allowing the device to maintain a compact form while preventing thermal-induced misalignment through the isolated positioning.
3Device complexity
If traditional fastening methods are used, then the structure is simple, but alignment precision is compromised due to heat expansion
Solution Approach 1:
Air clamps are used instead of traditional mechanical fastening methods. These air clamps utilize pneumatic pressure to provide controlled, uniform fastening force that can accommodate thermal expansion while maintaining precise alignment. The air-actuated mechanism allows for fine adjustment and compensation of dimensional changes due to heat.
Solution Approach 2:
The fastening system transitions from rigid mechanical connection to a dynamic pneumatic connection. The air clamps can adjust their fastening force dynamically in response to thermal expansion and contraction, maintaining optimal alignment precision throughout temperature variations during operation.
Data Source
AI summary
The present disclosure provides a droplet discharging device capable of minimizing misalignment of a plurality of heads. The droplet discharging device comprises a base including a head fixing region to which a plurality of heads are fixed; a pack holder disposed on the base and including an opening penetrated by the plurality of heads installed on the base; a guide pin installed on the pack holder and protruding towards the base; a guide holder installed on the base and fastened to the guide pin; a first fastening part installed on the pack holder and protruding towards the base; and a second fastening part installed on the base and fastened to the first fastening part, wherein a lock air is supplied to one of the first fastening part and the second fastening part, thus fastening the first fastening part and the second fastening part.