KR20230143077A - Manufacturing Method of Paper Protector for Plate Glass - Google Patents

Abstract

The present invention is a paper protector for plate glass that protects the edges from the risk of scratches, damage, and breakage due to contact between the edges when transporting or storing multiple plate glass stacked in a warehouse. The structure is very simple compared to edge protectors made of synthetic resin injection products. The aim is to provide a method of manufacturing a paper protector for plate glass that can be mass-produced, can be distributed at low cost through mass production, is harmless to the environment when disposed of, and has high cushioning properties, so there is no risk of deformation or breakage, thereby ensuring excellent edge protection. , the material that makes up the edge protector for protecting plate glass is laminate; Conveying the laminated paper using a conveying roll to pass under a core having a circular cross-section; Preliminarily bending the laminated portion to be conveyed by pressing it with a first shaping unit; Bending the pre-bent laminated portion by pressing and heating it with a second intermediate shaping unit; A paper protector for plate glass and a method of manufacturing the same are characterized by the step of pressurizing and heating the middle bent laminated part to the third shaping unit to form an edge protector in which the upper body is formed into a C-shaped body and the lower body is formed into a V-shaped body. .

Description

Paper protector for plate glass and manufacturing method thereof {Manufacturing Method of Paper Protector for Plate Glass}

The present invention can be mass-produced compared to existing synthetic resin injection-molded plate glass protectors in forming a plate glass protector used to protect the edges of the plate glass from the risk of scratches, damage, and breakage when transporting a large number of plate glasses by loading them on a truck or storing them in a warehouse. It relates to a paper protector for plate glass that can be distributed at low cost, has high cushioning properties and strength, and does not deform or break, thereby providing excellent protection for plate glass, and a method of manufacturing the same.

When moving or storing multiple panes of glass shipped from a manufacturing plant to a loading dock within the factory or transporting them over long distances by vehicle, multiple panes of glass are stacked vertically or tilted in a ㅅ shape to transport them.

In this case, since the vehicle shakes left and right or vibrates up and down, damage often occurs due to contact impact between the glass plates during the transportation process.

In order to prevent damage to the pane glass during transportation, you must protect the edges of each pane on all sides to prevent the edges of the panes from colliding with each other to prevent damage or breakage.

When stacking multiple panes of glass horizontally or vertically, if adjacent panes come into close contact with each other, a vacuum occurs, making it difficult to separate them into single sheets, and there is a risk that the panes may be damaged. Therefore, the need to install a spacer for each pane of glass to prevent contact between panes of glass is absolute. The guard also serves as a gap maintenance device to prevent vacuum between the panes of glass.

Since there was no special protector for plate glass in the past, the industry used slippers, waste newspapers, sponges, etc. to prevent damage between multiple laminated plates. Although interlining such as newspaper or corrugated paper contributes to preventing damage to the edge of the pane glass, the thickness is so thin that the gap between adjacent panes is so small that if foreign substances enter through it, the glass surface will be damaged, and if foreign substances get on the pane glass, the glass surface will be damaged. It also obscures the field of view, making it difficult to determine whether the glass plate is defective through visual inspection. In addition, since the insertion work is done manually, it is difficult and time-consuming to insert it consistently and straightly, and after use, it is inevitable to be discarded as it has no other use, which is a waste of resources.

Because the thickness of the sheet glass is thin, it is easy for the panes to slip and tear due to vehicle vibration or careless handling when transporting the panes, so their functions as gap maintainers and edge protectors tend to be lost.

And because sponges change their physical properties over time, becoming brittle and discolored, they are difficult to recycle and are prone to tearing.

Waste newspaper is no exception, and printing ink contaminates the surface of plate glass.

The bigger problem is that the slip sheet is not elastic and has no adhesion or holding power, and since it is simply a paper sandwiched between glass plates, it is easily torn and separated during transportation.

Considering the problems of conventional plate glass protectors, the gap maintainer for plate protection disclosed in Patent No. 10-0858679 is known as a proposed prior art.

This prior art is a synthetic resin (plastic) molded product that has no elasticity effect at all, and has problems such as being hard, brittle, broken, and scratched.

It is a clip type in which a pair of side plates with a hollow contact auxiliary part formed in the axial direction at the free end extend side by side from both ends of the connecting plate as if extending two arms. It is a short synthetic resin injection molded product in which both side plates are covered and sandwiched between the edges of the plate glass. It is worn on the edge near the edge to maintain the gap between the panes of glass.

However, this gap maintainer has a complex cross-sectional shape, making it difficult to design and manufacture the injection mold, and its injection performance is low, making it unsuitable for mass production. In addition, as contact parts that contact the edge surface of the plate glass are added to the free ends of both side plates, productivity is further lowered and an increase in the manufacturing cost of each gap maintenance device is inevitable.

In addition, if the elasticity of one side plate relative to the connection plate is reduced, deformed, or damaged, the entire gap maintenance device becomes useless, and if the materials of the main body and contact parts made of the connection plate and side plate are different, it is difficult to recycle or even regenerate the closed spacer. It is difficult.

In addition, because it is made of synthetic resin, it is burdensome that environmental pollution issues are raised when disposed of, and because it has many problems, it is not used or found in general industrial sites.

Another prior art related to plate glass protection is known in Patent Registration No. 10-1632872, which concerns a floor mat with a convex-convex corrugated plate structure that is placed on the lower part of a plate glass erected vertically for transportation and storage.

Registered Patent No. 10-0858679 Registered Patent No. 10-1632872

The purpose of the present invention is to provide a protector for plate glass that protects against the risk of scratches, damage, and breakage due to contact between panes when transporting or storing multiple panes of glass by stacking them in a warehouse. The structure is very simple compared to the conventional synthetic resin injection protector. We provide a paper protector for plate glass and its manufacturing method that can be mass-produced, can be distributed at low cost through mass production, is harmless to the environment when disposed of, and has high cushioning properties, so there is no risk of deformation or breakage, providing excellent protection. That's what I'm trying to do.

The protector provided in the method for manufacturing a paper protector for plate glass of the present invention is manufactured using paper as the main material. Paper includes waste paper.

For the paper protector for plate glass of the present invention, it is preferable to use as the fabric of the product a lamination of several sheets of paper so that the thickness ensures the minimum gap between the plate glass.

Corrugated cardboard is prone to deformation because the corrugation inherent between the outer shells is vulnerable to external forces acting in the direction of the surface, and is unsuitable as a plate glass protector that requires high compressive strength.

The laminated paper used as a protector fabric is cut to a predetermined width and made into a strip, or the laminated strips are thickly laminated and joined.

By continuously supplying laminated paper to a long core with a circular, oval, or candle-shaped cross-section, the fabric being transported is continuously formed by the core.

The supplied fabric is placed on the outer surface of the core with the center of the width of the strip-shaped laminated paper, and based on the center, the wings on both sides are pressed in the center direction of the core and heated while bending to form a plate glass protector with a cross section resembling a candle-shaped clip. I order it.

Plate glass protectors are molded into long pieces, and can be cut to the required length according to the horizontal and vertical lengths of the plate glass, or the length is standardized and fitted sparsely around the edges of the plate glass.

This protector protects the edge of the plate glass by simply covering the free ends of both wings and attaching them to the edge of the plate glass.

A waterproof coating solution is sprayed on the outer surface of the molded protector through a separate process and operation to form a waterproof film to prevent penetration of moisture and moisture.

The waterproof membrane coating layer on the outer surface of the protector can be manufactured into a finished product by gluing pre-made waterproof paper or laminating the waterproof membrane, and the waterproof membrane coating structure is designed to prepare for tissue breakdown of the edge protector due to moisture infiltration.

The above waterproof coating waterproof paper and waterproof membrane use oil paper, synthetic resin film, or synthetic resin membrane.

Since the paper protector for plate glass manufactured by the present invention can be made of waste paper, it can be supplied at a cheaper price than corrugated cardboard or synthetic resin injection molded products.

Paper protectors can be conveniently used by standardizing them into long pieces and then cutting them to a length that meets the specifications of the plate glass.

Since long friction protrusions can be formed in the axial direction on the inner surface of the paper protector of the present invention, the phenomenon of the edge protector worn on the edge of the plate glass being pushed outward and peeled off can be minimized.

Paper protectors have greater tensile strength and durability than corrugated cardboard or synthetic resin injection-molded products, so they do not rupture under the slightest impact, and they maintain their original shape throughout, ensuring excellent protection of the edges of the plate glass.

Figure 1 is a partial cutaway view of a paper protector for plate glass manufactured by the present invention.
Figure 2 is a cross-sectional view of one side of the same side.
Figure 3 is an example of wearing the edge protector of the present invention on the edge of a plate glass.
Figure 4 is an example of laminated fabric, which is the material of the paper protector.
Figure 5 is a formal conceptual diagram of a paper protector
Figure 6 is a shaping process diagram of a paper protector.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings prepared based on preferred embodiments.

The material of the paper protector (1) used in the present invention shown in Figures 1 and 2 is laminated fabric (2). The laminated fabric (2) is made by stacking and bonding several sheets of paper into one piece, and includes recycled paper as well as clean paper. The laminated fabric (2) must be thick enough to secure the minimum gap between the panes of glass.

Here, corrugated cardboard is excluded. This is because corrugated cardboard has a small stress against external force acting in the direction of the surface of the corrugated paper, so it is likely to be deformed, such as being crushed when pressed, and is unsuitable for edge protectors that require high compressive strength.

The laminated fabric (2) is cut lengthwise to a predetermined width to make a strip, or the strips are laminated and joined in an appropriate number.

The outer layer (3) of the laminated fabric (2) has a waterproof function, and when rainwater or tears get on the outer layer (3) when transporting or storing plate glass in a vehicle, the inner paper layer of the outer layer becomes wet and flabby, and the laminated structure also breaks down. and the strength decreases. In that case, it is inevitable that its function as an edge protector will deteriorate. Waterproofing is a solution to this.

The outer covering paper (3) is a waterproof paper with waterproof properties, such as oil paper, synthetic resin film, or synthetic resin film. The laminated fabric (2) is a fiber that excludes oil, and the outer covering (3) made of oil paper, synthetic resin film, etc. contains oil, which may cause difficulties in bonding. Taking this into account, the two sides are joined using an adhesive that can join regardless of the material, or they are coated or laminated.

This outer covering paper 3 can be selectively used in various types of materials, thicknesses, and structures as needed.

The paper protector (1) of the present invention resembles a C-shaped or candle-shaped clip. That is, it is a double-wing type in which long nipper wings (4) are located on both sides of the central elastic body (5). The two side finger wings (4) open and contract thanks to the elasticity of the elastic body (5), but when the external force disappears, they return to their original shape and are of a pincer type that bites both sides of the edge of the plate glass at the same time.

In Figure 3, open the free ends of both nipper wings (4) with one hand and insert them deeply to surround the edge (7) of the plate glass (6). When the hand is released, the nip wings (4) are restored and elasticity of the elastic body (5). It shrinks and protects the edge (7) of the plate glass. The clamping state against the edge (7) continues until the paper protector (1) is removed.

In principle, the paper protector (1) should be worn by cutting it into horizontal and vertical bars in the case of square plate glass (6). If necessary, the edge protector can be worn only on the top of the pane (6) or on all four sides.

In addition, depending on the size of the plate glass 6, only one paper protector 1 can be worn on each side, or a plurality of paper protectors 1 can be worn at appropriate intervals.

Figures 4 to 6 are illustrations sequentially explaining the manufacturing process of the paper protector (1) of the present invention. In the drawings, Figure 4 shows the laminated fabric used in manufacturing the paper protector (1) used in the present invention ( This is an example of 2).

The laminated fabric (2) is made by stacking and bonding several sheets of paper into one piece. Laminates of the required length and thickness are selectively used among separately manufactured long laminated papers (fabric sheets), and the selection condition is that there is a minimum gap between the panes of glass. Use one manufactured with a thickness that can secure the gap.

Figures 5 and 6 sequentially illustrate the apparatus and process for standardizing and manufacturing the above-mentioned paper protector (1), Figure 5 is an exemplary plan view for explaining the molding process. In the drawing, the left side is used as an inlet, the central portion is used as a molding section, and the right side is used as an outlet.

At the bottom of the molding section, a conveyor-type pressure roll is installed to transport the molded product at low speed from the left entrance to the right exit, and a product molding core 10 is installed long in the longitudinal direction in the center of the molding tunnel 30.

As shown in FIG. 6, the inner wall of the forming tunnel 30 has a tapered passage that is wide at the entrance and gradually narrows toward the exit.

In other words, the entrance side of the forming tunnel 30 is a tunnel whose bottom is flat and guides the laminated fabric 2 in a flat shape, but is gradually curved inward to guide it into a candle shape.

In the present invention, the laminated fabric (2) loaded long on the transfer table is gradually moved toward the central core (10) through the tapered passage in the forming tunnel (30) while moving by the pressure conveying means from the left side of the core (10) to the right side. It is pushed and shaped into a step-by-step shape so that the long paper guard (1) is discharged through the exit.

Referring to FIG. 5, the interior of the molded tunnel 30 is divided into a first shaped portion 22 at the entrance, a second shaped portion 23 at the middle portion, and a third shaped portion 24 at the distal end, which will be described in detail as follows. same.

First, the laminated fabric 2 introduced in a flat state by the pressure roll moves while being bent in an arc while passing between the core 10 and the first shaping part 22.

As described above, the laminated fabric that is initially bent and moved is gradually bent upward in a U-shape as it passes through the second shaping portion 23, and eventually, as it passes through the third shaping portion 24, both nipper wings 4 are bent at the free ends. It is folded close enough to touch and is shaped into an edge protector that resembles the cross section of a candle.

The second shaping unit 23 for intermediate bending and the third shaping unit 24 for final bending are equipped with heating means (not shown) that can harden the elastic body 5 as shaped. The heating means is either a hot water heater or an electric heater, and the heating temperature is at an appropriate level for shaping the laminated fabric 2 so that it does not discolor. The time for the laminated fabric 2 to pass through the intermediate second shaping unit 23 and the final third shaping unit 24 is based on the heating temperature.

If the elastic body (5) is not hardened as it is bent, the elasticity is excessive and the clamping wings (4) on both sides are not folded to the angle required for clamping, and then the edge of the plate glass cannot be clamped properly. Considering this, the elastic body Formalization of (5) is essential.

Figure 6 is a diagram illustrating in detail the shaping process shown in Figure 5 step by step.

A in Figure 6 is the first initial stage, in which the laminated fabric 2 is placed lengthwise on the left side of the core 10 with a circular or candle-shaped cross-section, the central part of the width is aligned with the core 10 in the longitudinal direction, and the laminated fabric 2 is pressed. When the roll is operated, the laminated fabric 2 is transferred in a flat state toward the first shaping part 22 on the right side.

Figure 6b is the second step, in which the laminated fabric 2, which is transported in a flat state in the process a, flows into the forming tunnel 30, and at the same time, both nipper wings are formed by the inclined surface of the tunnel inner wall (first forming part). (4) was gradually pushed upward and bent into a curved surface, showing a state of being transported.

Immediately after the initial stage, the first shaping unit 22 is located, and the laminated fabric 2 being conveyed by the conveying roll passes between the core 10 and the first shaping unit 22 and is first pre-bent in an arc shape.

In Figure 6c, the laminated fabric 2 moving inside the forming tunnel 30 in a pre-bent state like b above passes the second shaping part 23, and both nipper wings 4 are bent upward in a U shape. It showed a state of being.

In Figure 6d, the laminated fabric 2 that is bent and moved as shown in c passes through the third shaping portion 24 in the forming tunnel 30, and both nipper wings 4 are folded so close that the free ends almost touch. It is formed into the desired shape, that is, a candle-shaped edge protector that resembles the cross-section of a candle, and is discharged.

In the tapered passage inside the forming tunnel 30, a plurality of guide rollers are installed at appropriate intervals for each element to push the conveyed laminated fabric 2 toward the core 10, thereby achieving smooth conveying force and reliable shaping operation. Make them lose.

The paper protector 1, which is shaped and discharged in a long manner, is cut to a set size by an automated cutting machine.

In the shaping process, the second shaping part 23 for intermediate bending and the third shaping part 24 for final bending are equipped with heating means (not shown) that can harden the elastic body 5 as shaped. The heating means is either a hot water heater or an electric heater, and the heating temperature is at an appropriate level for shaping the laminated fabric 2 so that it does not discolor. The time for the laminated fabric 2 to pass through the middle second shaping part 23 and the final third shaping part 24 is based on the heating temperature.

If the elastic body (5) is not hardened as it is bent, the elasticity is excessive and the clamping wings (4) on both sides are not folded to the angle required for clamping, and then the edge of the plate glass cannot be clamped properly. Considering this, the elastic body Formalization of (5) is essential.

The paper protector, which is standardized with both side finger wings (4) bent at an angle suitable for holding the edge of the plate glass, functions properly as long as the elastic body (5) in the center of the body is not wet and is worn on the edge of the plate glass. It lasts for a long time, and is thicker than conventional sheet paper, thread, or waste newspaper, so the stress against external force acting in the plane direction, that is, compressive strength, is large, and the tensile strength is also large, so it can protect the edge of the plate glass more reliably.

In addition, compared to gap maintainers made of synthetic resin injections, their compressive strength and tensile strength are high, so they do not break or change shape under the slightest impact. Since they are fibrous, there is no risk of contaminating soil and water even when discarded after use, and they can be disassembled and recycled. there is.

The laminated fabric (2) includes a case where the outer covering (3) is waterproof paper, and during the manufacturing process of the laminated fabric (2), a separate waterproof outer covering (3) is laminated to the laminated fabric to produce an integrated form. there is. Another method is to spray a waterproofing liquid on the surface of the standardized paper protector (1) and heat it to solidify it to prevent atmospheric moisture, rainwater, and tears from seeping in.

The method of applying the waterproofing liquid can be done by installing an automatic coating device in a subsequent part of the molding part to automatically apply the waterproofing liquid to the molded product.

1: Paper protector
2: Laminated fabric
3: Outer paper
4: Narrow finger wings
5: Elastic body
6: plate glass
10: core
22: Initial first orthotope
23: middle second orthopedic part
24: Third orthopedic section
30: Forming tunnel

Claims (6)

The material that makes up the paper protector for protecting the edge of plate glass is laminated fabric;
A step of conveying the laminated fabric using a conveying roll to pass under a core having a candle-shaped cross-section installed inside the molding tunnel;
Preliminarily bending the portion of the laminated fabric being conveyed at the initial first shaping portion inside the molding tunnel;
A step of bending the laminated fabric nipper wing portion, which is transferred in a pre-bent state, by pressurizing and heating it by a second intermediate shaping unit;
Characterized by proceeding to the step of pressurizing and heating the portion of the laminated fabric transferred in the intermediate bent state in the third shaping unit to shape it into an edge protector where the upper body is formed into a C-shaped body and the lower body is formed into a V-shaped body. Method of manufacturing paper protectors for plate glass. The method of claim 1, wherein the material constituting the edge protector for protecting plate glass is a strip-shaped laminated fabric, and the outer covering is made of waterproof paper. The method of manufacturing a paper protector for plate glass according to claim 2, wherein the material of the laminated fabric is clean paper or waste paper. The method of claim 1, wherein the inner wall of the molding tunnel has a tapered passage that is wide at the entrance and gradually narrows toward the outlet, and the middle second shaping portion and the final third shaping portion inside the molding tunnel are paper plate glass with built-in heaters. How to make my protector. The method of claim 1, wherein the core installed in the forming tunnel has a circular or candle-shaped cross section. A sheet glass paper product in which a protector body with a candle-shaped cross-section is formed by folding long cardboard-type laminated fabrics of a certain thickness with a waterproof outer shell using a core and forming a body with a candle-shaped cross-section, forming a single body with an elastic body in the middle and flaps on both sides. Protector.