Inkjet Printing Bar Rail Clamping for Maintenance Access
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Solution Overview
Problem
Existing digital printing machines with inkjet printing bars face challenges in maintenance, alignment, and interference during position changes, as well as issues with bearing play and precise positioning.
Innovation Solution
A digital printing machine design featuring a movable printing bar with an adjustable roll and a spring-mounted roll assembly, where the rail is positioned between the rolls when the bar is in the working position and separate from the bar when retracted, allowing for horizontal and vertical adjustment, and incorporating a gear rack and gearwheel for precise positioning and synchronization of rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the printing bar is designed with fixed bushings and guide bolts that remain engaged during movement, then the structure is simpler, but maintenance becomes difficult and the printing bar cannot be easily accessed for service
Solution Approach 1:
The patent applies the dynamics principle by making the engagement between the rail and rolls conditional rather than fixed. The rolls are positioned to engage the rail only when the printing bar is in the working position, and disengage when retracted. This dynamic engagement state allows the system to switch between operational stability and maintenance accessibility, resolving the contradiction between ease of repair and device complexity.
2Manufacturing precision
If the printing bar uses fixed rolls that continuously contact the rail, then positioning stability is maintained, but bearing play cannot be eliminated and precise positioning becomes difficult
Solution Approach 1:
The patent applies preliminary action by pre-positioning the rolls at specific locations along the rail. The rolls are arranged to contact the rail at predetermined points that eliminate bearing play and ensure precise positioning. This preliminary arrangement of rolling elements before operation begins ensures both positioning precision and reliability by eliminating gaps and play in the mechanism.
3Ease of operation
If the rail remains engaged with the rolls during retraction, then the structure is more stable, but the rolls interfere with movement to the maintenance position and horizontal adjustment
Solution Approach 1:
The patent applies dynamics by making the engagement between rail and rolls variable based on the printing bar's position. During retraction and maintenance operations, the rolls disengage from the rail, allowing free movement and horizontal adjustment. When the printing bar reaches the working position, the rolls engage the rail to provide structural stability. This dynamic engagement resolves the contradiction between ease of operation and structural stability.
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
Facilitates easier maintenance, eliminates bearing play, and ensures accurate positioning by allowing the rail to be clamped between rolls, enabling smooth movement and precise alignment of the printing bar, enhancing operational efficiency.
Implementation Method 1
a spring-mounted roll (8, 9, 13, 14) and an adjustable roll (10, 11, 16, 17)
Implementation Method 2
the rail (7) is combined with a gear rack (18) and the adjustable roll (10, 11, 16, 17) is combined with a gearwheel (21)
Data Source
AI summary
A digital printing machine includes a printing bar for inkjet printing. The printing bar is mounted to be movable into a working position and into a retracted position. An adjustable roll and a spring-mounted roll form a first assembly and are disposed opposite one another. A rail forms a second assembly and is located between the adjustable roll and the spring-mounted roll when the printing bar is in the working position and is not located between the adjustable roll and the spring-mounted roll when the printing bar is in the retracted position. One of the two assemblies is disposed on the printing bar and the other of the two assemblies is separate from the printing bar.