Vacuum Pinch Arm Web Separation Mechanism

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Solution Overview

Problem

Conventional winding machines require physical contact and speed differences to separate web materials, which can be inefficient for tough materials and pose durability and safety concerns.

Innovation Solution

A winding machine with a separation mechanism using a pivot shaft and pinch arm that applies a vacuum suction force to separate web materials without physical contact, employing a suction channel and passage to induce tearing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a rotatable arm is used to separate web material by speed difference, then separation can be achieved, but the machine requires careful speed control and large speed differences for tough materials

Engineering Contradiction:

Improveseparation operationVSAvoidspeed control mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical speed-difference-based separation system with a vacuum suction-based separation system. The vacuum suction cup directly pulls the web material without requiring speed differential control, substituting mechanical complexity with a simpler vacuum control mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a vacuum suction cup connected to a vacuum source, using pneumatic principles to grasp and separate the web material. This pneumatic approach eliminates the need for complex mechanical speed control while providing reliable separation force.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Productivity

If a driving arm physically contacts the upper winding roller to hold down web material, then separation can be achieved, but durability and operation safety are compromised

Engineering Contradiction:

Improveseparation efficiencyVSAvoidcomponent durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent introduces a vacuum suction cup as an intermediary between the separation mechanism and the web material. This intermediary grasps the web material without requiring physical contact between the driving arm and the upper winding roller, thereby protecting the roller surface and improving component durability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct mechanical contact between the driving arm and upper winding roller with a vacuum suction-based holding mechanism. This substitution eliminates wear and potential damage from physical contact while maintaining effective web material control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If speed difference is used to pull apart tough web material, then separation is achieved, but the speed difference must be sufficiently large which may cause other operational issues

Engineering Contradiction:

Improveseparation forceVSAvoidrotational speed difference

Core Design Contradiction:

StrengthVSSpeed

Solution Approach 1:

The patent replaces speed-difference-based force generation with vacuum suction-based force generation. The vacuum suction cup provides direct pulling force through vacuum pressure, eliminating the need for large speed differences while maintaining sufficient separation force for tough materials.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameter for generating separation force from speed difference (kinematic parameter) to vacuum pressure (force parameter). This parameter change allows for controlled, sufficient separation force without the operational complications of large speed differences.

Inventive Principle:

Principle #35Parameter changes

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

Enhances operational smoothness and safety while improving mechanical durability by allowing web material separation without physical engagement, effectively tearing even tough materials.

Implementation Method 1

the web engagement end of the pinch arm sucks and holds or guides a web material passing therethrough

Methodology Applied

Scientific EffectVacuum suction: Suction

Data Source

PatentUS8979012B2Method and structure for separating the web material in a winding machine

Publication Date: 2015.03.17 CHAN LI MACHINERY CO LTD

AI summary

A winding machine includes an upper winding roller and a separation mechanism arranged at a location close to and below the upper winding roller. The separation mechanism includes a pivot shaft having an outer circumferential surface and at least one pinch arm having a connecting end coupled to the outer circumferential surface of the pivot shaft and a web engagement end extending outward from the outer circumferential surface of the pivot shaft. When the pinch arm is driven by a driving mechanism to rotate the web engagement end of the pinch arm to an engagement position where the web engagement end opposes the upper winding roller, the web engagement end of the pinch arm sucks and holds or guides a web material passing therethrough, whereby the web material is subjected to a pulling force induced by a roll of paper formed in a winding nip to tear and thus separate.