Label Applicator Plunger Mechanical Pressure Regulator
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Solution Overview
Problem
Existing labeling devices for stretch film packaging machines are complex and costly due to high demands on control and motor systems, requiring self-locking motors and electric valves for pressure relief, which are difficult to control and maintain.
Innovation Solution
A labeling device with a mechanical pressure regulator in the plunger, allowing for negative pressure interruption without electronic control, using a movable part that changes position to release labels mechanically, reducing the need for complex electronic systems and enhancing safety and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-locking motors are used to prevent platform falling during power failure, then safety is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical self-locking motor system with a pneumatic counterbalance system. Compressed air is supplied to a cylinder that generates an upward force to counteract the weight of the platform, allowing standard motors to be used instead of expensive self-locking motors while maintaining safety and reducing complexity.
2Stress or pressure
If electric valves are used for pressure relief, then pressure control is improved, but ease of operation and maintenance worsen due to separate control requirements
Solution Approach 1:
The patent combines the pressure relief function with the existing suction cup structure. The suction cup itself serves dual purposes: holding the workpiece through vacuum and providing pressure relief when needed, eliminating the need for separate electric valves and their complex control systems.
3Measurement precision
If sensors are added to determine pressure relief timing, then pressure control precision is improved, but device complexity increases
Solution Approach 1:
The system uses the existing vacuum sensor that monitors suction cup operation to automatically determine when pressure relief is needed. The sensor detects when the workpiece is no longer held by the suction cup, triggering pressure relief without requiring additional sensors or complex control logic.
4Weight of moving object
If platform weight is reduced for easier handling, then ease of operation is improved, but positioning accuracy may worsen
Solution Approach 1:
The patent uses a pneumatic counterbalance system where compressed air generates an upward force to counteract the platform's weight. This allows the platform to be lightweight for easy handling while maintaining stable positioning through the counterbalancing air pressure, preventing both overloading and positioning errors.
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 simplifies the control and drive systems, reduces the load on motors, and eliminates the need for electric valves, making the device safer and more cost-effective while maintaining high positioning accuracy.
Implementation Method 1
a negative pressure in the plunger, in particular in the movable part of the plunger, which serves to receive the label
Implementation Method 2
A drive section is designed to move the cover section and thus open or close the vacuum interruption opening
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
A labeling device (11) for a stretch film packaging machine, comprising a robot with a robot base (19) and a receiving device (21) for receiving a label, is characterized in that the receiving device (21) has a base plate and a plunger (24), that the plunger (24) comprises a fixed part mounted on the base plate and not displaceable in the longitudinal direction of the plunger (24) with respect to the base plate, and a part of the plunger (24) movable in the longitudinal direction of the plunger (24) within the fixed part, with a front end, that the plunger (24) has a mechanical pressure regulator, that the robot base (19) is connected to the platform (20) by a return element (26), and that the movable part of the plunger (24) extends through the fixed part of the plunger (24) towards the base plate (27) into a retracted position in the direction of the longitudinal axis of the plunger (24). is movable,wherein the movable part of the plunger (24) has an opening, the opening being gas-tightly covered in an extended position of the movable part of the plunger (24) and not covered by the fixed part of the plunger (24) in the retracted position of the movable part of the plunger (24). Such a labeling device is structurally simple and safe, particularly with regard to the requirements for the control and drive.