Spray Device Needle Valve Adjustment Mechanism
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Solution Overview
Problem
Conventional spray devices face challenges in quickly and reliably changing colors and cleaning operations, with complex structures leading to increased production and assembly time, and difficulties in adjusting the needle position accurately for optimal paint discharge.
Innovation Solution
A spray device with a needle position adjustment mechanism that allows for manual adjustment using a rotatable adjustment knob and rotational stopper, enabling easy disassembly, assembly, and maintenance, and allowing the needle to be set in multiple positions for efficient paint discharge and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional spray device uses a fixed or complex needle valve structure, then the device can maintain structural stability, but the cleaning time and paint changeover time increase significantly
Solution Approach 1:
The needle valve structure is made dynamically adjustable through a rotation amount adjustment mechanism that allows the needle to be rotated to different angular positions. This enables the discharge orifice opening to be changed between coating and cleaning states, allowing quick switching between painting and cleaning operations without complex disassembly procedures.
Solution Approach 2:
The spray device is divided into separable components including the gun unit, bracket unit, and rear body, with the needle valve being an independent adjustable element. This segmentation allows for easier maintenance and cleaning operations while maintaining overall structural stability during normal operation.
2Manufacturing precision
If the needle valve structure is made complex to achieve precise paint discharge control, then manufacturing precision improves, but production and assembly time increase
Solution Approach 1:
The rotation amount adjustment mechanism is pre-configured with a rotational stopper that has positioning holes at predetermined angular positions. These positions are prepared in advance during manufacturing, allowing the needle to be quickly adjusted to specific coating or cleaning states without complex adjustment procedures during assembly or operation.
Solution Approach 2:
The complex mechanical adjustment mechanism is replaced with a simplified rotation-based system where the needle rotates around the center axis of the nozzle. The rotational stopper with positioning holes provides precise positioning without requiring complex multi-component adjustment mechanisms, reducing both manufacturing complexity and assembly time.
3Adaptability or versatility
If the spray device uses a fixed needle position system, then the structure is simpler, but the adaptability to different colors and cleaning operations is reduced
Solution Approach 1:
The needle valve is designed with multi-functionality through the rotation amount adjustment mechanism that can position the needle at different angular orientations. This single mechanism enables both coating operations (with the needle in specific positions for different colors) and cleaning operations (with the needle rotated to open the discharge orifice), providing universal functionality across different painting and cleaning tasks.
Solution Approach 2:
The needle valve transitions from a fixed position system to a dynamic adjustable system where the needle can be rotated to different angular positions. This dynamic capability allows the same hardware to adapt to different colors and cleaning requirements by simply changing the needle's angular orientation, enhancing versatility without requiring multiple specialized components.
Data Source
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AI summary
[Issue] To provide a spray device which makes it possible to simply adjust the amount of paint ejected, and in which the nozzle can be effectively cleaned. [Means of Resolution] The spray device 400 according to the present invention is provided with a nozzle 122, a needle 150 for opening and closing a paint ejection orifice, a front piston 170 which is fixed to the needle, and a needle spring 174 for pushing the front piston. Provision is further made for a needle position adjustment mechanism for adjusting the position of the needle 150 in the direction along the center axis of the nozzle. The needle position adjustment mechanism includes an adjustment member 430 which is rotatable with the center axis of the nozzle 122 at the center, and a rotation position setting member 450 for setting the position of the front piston 170 along the center axis of the nozzle in correspondence to the angle of rotation of the adjustment member.