Vacuum Suction Pinch Arm for Web Material Separation

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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

1Productivity

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:

Improveweb material separation efficiencyVSAvoidspeed control complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical speed-difference-based separation system with a vacuum suction-based separation system. The vacuum suction arm uses negative pressure to hold and separate web material, eliminating the need for complex speed control mechanisms and rotatable arms that rely on rotational speed differences.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a vacuum suction mechanism using pneumatic principles to achieve web material separation. The vacuum suction arm creates a pressure difference to hold and separate the web material, replacing the purely mechanical speed-difference approach with a pneumatic-based system.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Ease of operation

If a driving arm physically contacts the upper winding roller surface, then web material can be held down and separated, but durability and operation safety are compromised

Engineering Contradiction:

Improveweb material separation capabilityVSAvoidcomponent durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces direct mechanical contact between the driving arm and upper winding roller with a vacuum suction-based holding mechanism. The vacuum suction arm holds the web material through negative pressure without physical contact to the roller surface, eliminating wear and safety concerns associated with direct mechanical contact.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces vacuum suction as an intermediary mechanism between the separation system and the web material. Instead of direct mechanical contact, the vacuum field acts as a mediator to hold and separate the web material, reducing mechanical stress and improving reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Force

If physical engagement is used to separate web material, then separation force can be applied directly, but the machine components experience wear and safety risks

Engineering Contradiction:

Improveweb material separation forceVSAvoidmechanical wear and safety risks

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent replaces direct mechanical force application through physical engagement with a vacuum suction-based force application system. The vacuum suction arm applies holding force through negative pressure rather than mechanical contact, reducing wear on components and eliminating safety risks associated with physical engagement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses pneumatic vacuum suction to apply holding force to the web material without mechanical contact. This pneumatic approach replaces the mechanical force application method, reducing wear and improving safety while maintaining effective separation capability.

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 vacuum suction arm is allowed to tear a web material fed through a winding machine without physical contact with an upper winding roller of the machine

Methodology Applied

Scientific EffectVacuum suction force: Suction

Data Source

PatentUS8979011B2Method 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.