Abstract

A rolling test device for flexible materials includes a rolling unit composed of a winding roller that grips a first side of a flexible material, and a winding drive part that rotates the winding roller forwards and backwards so that the flexible material is wound on the winding roller or the flexible material is unwound from the winding roller, a sliding unit that grips a second side of the flexible material, is spaced apart from the winding roller, and slidably moves the flexible material according to rotation of the winding roller, a lifting unit that moves the rolling unit up and down, and a control unit that controls operations of the rolling unit, the sliding unit, and the lifting unit according to the rotation of the winding roller so that an inclination of the flexible material is adjusted between the rolling unit and the sliding unit.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

The present invention provides a stress-free folding mechanism comprising: a base module; and a folding module which is rotatably coupled to the base module to implement a folding motion of a flexible material and to which the flexible material is coupled, wherein the folding module includes: a folding body spaced apart from the base module; a rotational driving member having one end rotatably coupled to the base module and the other end rotatably coupled to the folding body; and a linkage member slidably coupled to the folding body via a sliding member.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01N 3/04 - Chucks

Abstract

A stress-free folding mechanism includes a base module, and a folding module rotatably coupled to the base module to implement a folding action of a flexible material, and to which the flexible material is coupled. The folding module includes a folding main body disposed spaced apart from the base module, a rotational drive member, a first end of which is rotatably coupled to the base module and a second end of which is rotatably coupled to the folding main body, and an interlocking member slidably coupled to the folding main body via a sliding member.

IPC Classes  ?

• G06F 1/16 - Constructional details or arrangements

Abstract

A folding mechanism includes a base module and a folding module which is coupled to the base module such that the folding module is capable of being rotated so as to realize a folding operation of a flexible material and which is coupled to the flexible material such that the folding module is capable of being slidably moved.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

The disclosed dual folding jig comprises a plurality of body portions folded toward each other, a folding connection portion connecting the plurality of body portions to be foldable to each other while connecting the plurality of body portions to each other, a first folding guide portion hinged to one end portion of one of the plurality of body portions, and a second folding guide portion hinged to one end portion of another body portion connected to one of the plurality of body portions and formed adjacent to the first folding guide portion.

IPC Classes  ?

• G06F 1/16 - Constructional details or arrangements
• H04M 1/02 - Constructional features of telephone sets
• F16C 11/04 - Pivotal connections

Abstract

Proposed is an auto-flattening control method that is an auto-flattening control method for determining a minimum driving value of tension that is applied to a sample coupled at both sides to a moving unit and a winding unit, respectively. The auto-flattening control method includes a sample rotation step of rotating the winding unit at a preset reference angle, a setup value checking step of monitoring a rotation load that is applied to a sample by rotation of the winding unit, and a setting comparison step of comparing variations between an N-th (a natural number larger than 0) rotation load and an N-1-th rotation load for the rotation load that is monitored through the setup value checking step.

IPC Classes  ?

• G01N 3/28 - Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

A sample stretch test device includes a setup table and grip modules arranged with regular intervals along an edge of a virtual arrangement circle around a center of the setup table and configured to grip a sample to be tested, and further includes at least any one of grip driving modules coupled to the setup table and configured to slide the grip modules along normals of the virtual arrangement circle in a horizontal direction parallel with the sample, and a pressing module disposed under the setup table and configured to press the sample in a vertical direction perpendicular to the sample.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

A 360 degree folding jig performs actions similar to those of a product to which a sample is applied when conducting a durability test for the sample. The 360 degree folding jig includes a fixed plate module on which one side of a sample is supported, a folding plate module that is spaced apart from the fixed plate module and on which the other side of the sample is supported so as to be reciprocally movable, and a pair of rotation support modules respectively provided at each end of the mutually adjacent fixed plate module and the folding plate module, and configured to couple the folding plate module to the fixed plate module so that the folding plate module is in-folded or out-folded.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces

Abstract

A rolling apparatus for evaluating durability of a flexible material includes a base unit, a rolling unit rotatably coupled to the base unit and around which the flexible material is wound, and a sliding unit which grips an end of the flexible material wound around the rolling unit and is spaced apart from the rolling unit to be slidably coupled to the base unit. The sliding unit is set to at least one of a preset speed and torque in the direction in which the flexible material is pulled, and at least one of the speed and torque of the rolling unit for an unrolling operation of the rolling unit and a rolling operation of the rolling unit is controlled such that the flexible material can maintain a flat state.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• B21C 47/20 - Unwinding or uncoiling from reels or drums the unreeled material moving transversely to the tangent line of the drum, e.g. axially, radially

Abstract

A sliding apparatus for durability evaluation of a flexible material includes a base unit having a folding space formed therethrough, a sliding unit which is coupled to the base unit to be slidably movable and to which one side of a flexible material to be evaluated is fixed, and a folding unit which is arranged to be apart from the sliding unit, to which the other side of the flexible material is fixed, and which rotates with respect to the sliding unit to in-fold or out-fold the flexible material in an unfolded state. The sliding unit changes the position of the bent portion formed in the flexible material as the sliding unit slidably moves on the base unit with the flexible material in an in-folded state or out-folded state.

IPC Classes  ?

• G01N 3/34 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces

Abstract

Provided is a device for evaluating 360-degree bidirectional folding durability of a flexible material in which during a folding test of a film-type flexible material, a single folding device can implement both the infolding and outfolding of the flexible material relative to the unfolded state of the flexible material. To this end, the device includes: a fixing unit configured to fix a first side of the flexible material to be evaluated; a moving unit configured to fix a second side of the flexible material and disposed to be spaced apart from the fixing unit; a motion guide unit to which the fixing unit is fixed; and a motion unit connecting the motion guide unit with the moving unit.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

The present invention relates to a folding apparatus for flexible material durability testing, the folding apparatus including: a material fixing part fixing a part of a flexible material to be tested; a pivoting plate spaced apart at a predetermined gap from the material fixing part, and folding or unfolding the flexible material by rotatively moving in a state where the other part of the flexible material is fixed thereon; and a motion controller supporting the pivoting plate to enforce the pivoting plate to rotatively move and to allow the pivoting plate to forwardly or backwardly move with respect to the material fixing part at the same time. In addition, because a miscellaneous force in addition to tensile force is not applied to the material during flexible material durability testing, the testing is highly reliable. Accordingly, the folding apparatus may accurately perform the flexible material durability testing.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01N 3/04 - Chucks