Linear Slide Dosing Head for Contamination-Free Powder Delivery
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Solution Overview
Problem
Existing dosing devices are not suitable for precise and contamination-free delivery of powders or pastes due to structural issues that lead to inaccurate dosing and potential contamination, especially with toxic substances, and have complex and costly designs that are not compact.
Innovation Solution
A dosing head with a base body and a slide guided by a linear actuator, where the slide is displaced linearly by rotating the actuator, allowing for adjustable flow rates and a compact design, and the use of conductive materials to prevent electrostatic charging, along with a pivoting receiving device for easy insertion and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotary slide or long sliding tongue is used to cover the outlet opening, then the outlet can be sealed, but housing parts below the slide are required to guide the dosing material, which causes material accumulation and contamination
Solution Approach 1:
The harmful housing parts that caused material accumulation are completely removed from the design. Instead of using a rotary slide with guiding housing parts, the patent employs a linearly guided slide that moves in a straight line, eliminating the need for complex guiding structures below the slide and thus removing the source of material accumulation and contamination.
Solution Approach 2:
Instead of rotating the slide to open/close the outlet (which requires guiding housing parts), the invention inverts the motion type to linear movement. The slide is displaced linearly along the central longitudinal axis, reversing the conventional rotary mechanism and eliminating the harmful guiding structures.
2Reliability
If the outlet opening is located on a side surface with a long sliding tongue, then the outlet can be covered, but the structure becomes complicated and expensive
Solution Approach 1:
The invention inverts the conventional approach by locating the outlet opening on the end face rather than the side surface, and uses linear motion instead of rotary motion. This simplifies the overall structure, eliminates the need for long sliding tongues, and reduces manufacturing complexity and costs.
Solution Approach 2:
The dosing head is segmented into distinct functional components: the base body with outlet opening, the linearly moving slide, and the actuator. This modular segmentation allows for simpler manufacturing and assembly compared to integrated complex rotary mechanisms.
3Reliability
If the slide is arranged in a slot within the base body, then the outlet can be covered, but metering material accumulates in the slot
Solution Approach 1:
The harmful slot structure is completely extracted from the design. Instead of placing the slide within a slot in the base body, the slide is given independent linear movement space, eliminating the slot that would trap and accumulate dosing material.
4Ease of operation
If the actuator is arranged to the side of the outlet opening, then the slide can be actuated, but the dosing device becomes bulky
Solution Approach 1:
The actuator is merged with the base body structure, with its axis of rotation aligned with the central longitudinal axis of the dosing head. This integration allows the actuator to be compact and eliminates the need for side-mounted actuators that would increase the overall device volume.
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
Enables precise, contamination-free delivery of dosing materials into target vessels with a compact and cost-effective design, reducing the risk of material adherence and environmental contamination.
Implementation Method 1
a slide (80) which is guided on the base body (71) parallel to the central longitudinal axis by means of a linear guide (88)
Implementation Method 2
the use of conductive materials to prevent electrostatic charging
Data Source
Figure 1
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AI summary
A dispensing head comprises a base body with an end face and a connection point for a dispensing container or a cap. An outlet opening connected to the connection point is located in the end face of the base body. The dispensing head also includes a slide, which is guided on the base body parallel to the end face by means of a linear guide. To actuate the slide, the dispensing head has an actuator that is rotatably mounted on the base body about an axis of rotation orthogonal to the end face and includes an opening. In every position of the actuator relative to the base body, the outlet opening is located within the area of the opening. The slide includes a through-hole and is positioned between the base body and the actuator.By rotating the actuator relative to the base body, the slide can be moved linearly relative to the base body, whereby by moving the through-hole relative to the outlet opening the through-cross-section of the dosing head can be varied and the flow rate of free-flowing dosing material through the through-hole can be regulated.