KR102241722B1 - Gun for applying foam pad raw material, apparatus for applying foam pad raw material, and method for applying foam pad raw material - Google Patents

Abstract

A gun for applying a foam pad raw material, according to an exemplary embodiment, comprises a hollow cylinder into which the raw material of a foam pad in a molten state is introduced and temporarily accommodated; a nozzle coupled to one end along the longitudinal direction of the cylinder and formed with a discharge port through which the foam pad raw material in a molten state is discharged; a rod configured to open and close the discharge port of the nozzle by relative movement with respect to the cylinder along the longitudinal direction of the cylinder; and a rod driving unit that generates driving force for moving the rod, wherein the foam pad raw material in the molten state discharged through the discharge port is cut by the rod closing the discharge port.

Description

Foam pad raw material application gun, foam pad raw material application device, and foam pad raw material application method {GUN FOR APPLYING FOAM PAD RAW MATERIAL, APPARATUS FOR APPLYING FOAM PAD RAW MATERIAL, AND METHOD FOR APPLYING FOAM PAD RAW MATERIAL}

The present disclosure relates to a foam pad raw material application gun, a foam pad raw material application apparatus, and a foam pad raw material application method.

The automobile body is assembled by welding or bonding various metal panels. During the assembly process, a liquid or paste material (hereinafter referred to as "sealer") having characteristics such as adhesion, sealing, vibration suppression, rust prevention, waterproofing, and strength reinforcement is applied to the metal panel by the application device. Is applied. Sealers are named by various names depending on the purpose for which they are used. Particularly, a mastic sealer is a one-component paste-like substance in which a vulcanizing agent, an additive, a foaming agent, etc. are mixed with synthetic rubber as a main component, and is foamed and vulcanized when passing through an oven to be adhered. The mastic sealer is applied to the area where the gap is relatively irregular, and is applied to the metal panel for uniform filling, adhesion, and vibration suppression. Recently, a foam pad having a high foaming rate has been widely used in place of a mastic sealer.

However, a suction process (suck-back) in which the conventional foam pad raw material is partially sucked in the direction opposite to the discharge direction from the nozzle should be included when the application operation of the foam pad material is finished. Even when going through such a process, the foam pad raw material may leak to the end of the nozzle. In addition, when the application of the foam pad material is resumed, it is necessary to supplement the amount of the foam pad material sucked. Therefore, when the foam pad material is supplied, a boost process for instantaneously increasing the discharge amount must be accompanied. Since the servo motor installed in the foam pad raw material supply device generates a reverse rotation driving force in the suction process and an instantaneous high-speed rotation driving force in the boost process, the load acting on the servo motor may increase. Therefore, the durability of the servo motor may be deteriorated.

And, since the foam pad raw material in the molten state has a higher viscosity than the general sealer raw material, a conventional nozzle for applying the foam pad raw material is configured to cut the applied foam pad raw material by physically contacting the object to be coated through manual operation. . In the case of cutting the foam pad material in this manner, depending on the contact area or position between the nozzle and the object to be coated, the application shape may not be uniform at the position where the application of the foam pad material is finished.

In addition, when the nozzle is relatively moved from the object to be coated while the foam pad raw material is not completely cut, the applied foam pad raw material is partially separated from the object to be coated, so that the adhesion between the foam pad raw material and the object to be coated is reduced. It can be degraded. For example, if it is configured to cut the foam pad raw material applied by manually contacting the nozzle for applying the foam pad raw material with the object to be coated, it may lead to poor application of the foam pad raw material, so that the foam pad raw material is applied. Productivity may decrease.

Embodiments of the present disclosure improve or solve at least some of the problems in applying a conventional foam pad raw material. To this end, by automating the application of the foam pad raw material, several embodiments provide a foam pad raw material application gun that applies a foam pad raw material having a uniform application shape and excellent adhesion to the object to be coated at a position where the foam pad raw material is applied. do. Further, a foam pad raw material coating apparatus and a foam pad raw material coating method using a foam pad raw material application gun are provided.

Embodiments according to one aspect of the present disclosure relate to a foam pad raw material application gun. A foam pad raw material application gun according to an exemplary embodiment includes: a hollow cylinder in which the foam pad raw material in a molten state is introduced and temporarily accommodated; A nozzle coupled to one end portion along the longitudinal direction of the cylinder and having a discharge port through which the foam pad material in a molten state is discharged; A rod configured to open and close the discharge port of the nozzle by relative movement with respect to the cylinder along the longitudinal direction of the cylinder; And a rod driving unit that generates a driving force for moving the rod, and the molten foam pad raw material discharged through the discharge port is cut by the rod closing the discharge port.

In one embodiment, the foam pad raw material application gun may further include a cylinder heating unit disposed to surround the outer circumference of the cylinder and configured to heat the cylinder.

In one embodiment, the foam pad raw material application gun may further include a cylinder cover disposed to surround the outer circumference of the cylinder heating unit.

In one embodiment, the foam pad raw material application gun may further include a nozzle cover having an inner circumferential surface spaced outwardly from the outer circumferential surface of the nozzle.

In one embodiment, the foam pad raw material application gun may further include a nozzle heater supplying a heated fluid to a space between an outer circumferential surface of the nozzle and an inner circumferential surface of the nozzle cover.

In one embodiment, the foam pad material application gun may further include a sealing member installed at the other end of the cylinder located opposite one end along the longitudinal direction of the cylinder so that the rod penetrates.

In one embodiment, the foam pad raw material application gun may further include a guide member installed at one end of the cylinder so that the rod penetrates.

In one embodiment, the inner diameter of the cylinder may be configured to decrease as it approaches one end of the cylinder.

Embodiments according to one aspect of the present disclosure relate to a foam pad raw material application apparatus. A foam pad raw material application apparatus according to an exemplary embodiment includes a foam pad raw material application gun and a raw material supply unit for supplying the foam pad raw material in a molten state to the foam pad raw material application gun described above.

In one embodiment, the raw material supply unit, a hopper into which the foam pad raw material in a solid state is input; A barrel for melting the raw material of the foam pad in a solid state input through the hopper; A screw for pressurizing the foam pad raw material in a molten state in the barrel to the foam pad raw material application gun; And a screw driving unit configured to rotate the screw.

In one embodiment, the raw material supply unit may further include one or more cooling units disposed outside the barrel and cooling heat generated by rotation of the screw.

In one embodiment, the foam pad raw material application apparatus may further include one or more plasma heating units mounted on the foam pad raw material application gun so as to face the discharge port of the nozzle.

In one embodiment, the plasma heating unit may be disposed to be inclined at a predetermined angle with respect to the foam pad material application gun.

Embodiments according to one aspect of the present disclosure relate to a method of applying a foam pad raw material. A method of applying a raw material for a foam pad according to an exemplary embodiment comprises: a raw material supply step of supplying a raw material for a foam pad in a solid state through a hopper; A melting step of melting the solid foam pad raw material supplied through the hopper in the barrel; A pressure-feeding step of pressure-feeding the foam pad raw material melted in the barrel to the foam pad raw material application gun through a screw; A coating step of applying the foam pad raw material in a molten state, which is pressurized to the foam pad raw material application gun, to the object to be coated through the foam pad raw material application gun; And a cutting step of cutting the foam pad raw material in a molten state by closing the discharge port of the nozzle through the rod of the foam pad raw material application gun.

In one embodiment, the foam pad raw material application gun includes a hollow cylinder in which the foam pad raw material in a molten state is introduced and temporarily accommodated, and in the applying step, the cylinder is heated through a cylinder heating unit disposed to surround the outer circumference of the cylinder. It may include the step of.

In one embodiment, the foam pad raw material application gun includes a nozzle cover that is spaced outward from the outer peripheral surface of the nozzle to form an inner peripheral surface, and in the applying step, the heated fluid is supplied to the space between the outer peripheral surface of the nozzle and the inner peripheral surface of the nozzle cover. Thereby heating the nozzle.

In one embodiment, the foam pad raw material application method further includes a heating step of heating the object to be coated to which the foam pad raw material in a molten state is applied through one or more plasma heating units mounted on the foam pad raw material application gun. can do.

In one embodiment, the step of heating the object to be coated may be performed before the applying step.

In one embodiment, the foam pad raw material application method further includes a preload step of increasing the pressure of the foam pad raw material in the molten state stored in the foam pad raw material application gun by continuously executing the pressure feeding step while the rod closes the discharge port of the nozzle. can do.

According to the foam pad material application gun according to an embodiment, a discharge port through which the foam pad material in a molten state is discharged is formed in the nozzle, and the molten foam pad material discharged through the discharge port is configured to be cut by closing the discharge port. do. Therefore, since the foam pad raw material can be cut in a non-contact state between the nozzle and the object to be coated, the shape of the foam pad raw material can be maintained at a position where the application of the foam pad raw material is terminated, and the applied foam pad raw material is avoided. It is not separated from the object to be applied. Further, in a state in which the rod closes the discharge port, the molten foam pad material is not leaked or exposed to the outside, so that the time for solidification in the foam pad material application gun becomes longer. Accordingly, the period of the purge process of periodically discharging the foam pad material in a molten state may be lengthened when the foam pad material application gun is not in operation. Further, since the discharge of the foam pad raw material can be stopped by the rod closing the discharge port, the length dimension of the foam pad raw material to be applied can be made accurate. As a result, when the foam pad raw material is applied, the defect rate may be lowered and productivity may be improved.

1 is a perspective view showing a foam pad raw material application gun according to an embodiment of the present disclosure.
FIG. 2 is an exploded perspective view showing a foam pad raw material application gun shown in FIG. 1.
3 is a cross-sectional view taken along line III-III of the foam pad raw material application gun shown in FIG. 1.
4 is a perspective view showing the nozzle shown in FIG. 2.
5 is a cross-sectional view taken along the line V-V of the foam pad raw material application gun shown in FIG. 1.
6 is a cross-sectional view of the foam pad raw material application gun shown in FIG. 5, showing a state in which the rod has a discharge port open.
7 is a partially enlarged cross-sectional view showing a part of the foam pad raw material application gun shown in FIG. 3 on an enlarged scale.
8 is a perspective view showing the sealing member shown in FIG. 3.
9 is a perspective view showing the guide member shown in FIG. 3.
10 is a perspective view showing an apparatus for applying a raw material for a foam pad according to an embodiment of the present disclosure.
11 is a cross-sectional view taken along line XI-XI of the foam pad raw material coating apparatus shown in FIG. 10.
12 is a flowchart schematically illustrating a method of applying a raw material for a foam pad according to an embodiment of the present disclosure.

Embodiments of the present disclosure are illustrated for the purpose of describing the technical idea of the present disclosure. The scope of the rights according to the present disclosure is not limited to the embodiments presented below or specific descriptions of these embodiments.

All technical terms and scientific terms used in the present disclosure, unless otherwise defined, have meanings generally understood by those of ordinary skill in the art to which the present disclosure belongs. All terms used in the present disclosure are selected for the purpose of more clearly describing the present disclosure, and are not selected to limit the scope of the rights according to the present disclosure.

Expressions such as "comprising", "having", "having" and the like used in the present disclosure are open terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included. It should be understood as (open-ended terms).

Expressions in the singular form described in the present disclosure may include the meaning of the plural form unless otherwise stated, and the same applies to the expression in the singular form described in the claims.

Expressions such as "first" and "second" used in the present disclosure are used to distinguish a plurality of elements from each other, and do not limit the order or importance of the corresponding elements.

The term "unit" used in the present disclosure means software or hardware components such as field-programmable gate array (FPGA) and application specific integrated circuit (ASIC). However, "unit" is not limited to hardware and software. The “unit” may be configured to be in an addressable storage medium, or may be configured to reproduce one or more processors. Thus, as an example, "unit" refers to components such as software components, object-oriented software components, class components, and task components, processors, functions, properties, procedures, subroutines, Includes segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. Components and functions provided within the “unit” may be combined into a smaller number of components and “units” or further separated into additional components and “units”.

In the present disclosure, when a component is referred to as being "connected" or "connected" to another component, a component can be directly connected to or can be connected to another component, or a new other component It is to be understood that it may or may be connected via an element.

Directional directives such as "upper" and "upper" used in the present disclosure are based on one direction along the longitudinal direction of the foam pad raw material application gun in the accompanying drawings, and direction directives such as "downward" and "lower" are It means the opposite direction. The foam pad raw material application gun shown in the accompanying drawings may be oriented differently, and these direction instructions may be interpreted accordingly.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding elements are denoted with the same reference numerals. In addition, in the description of the following embodiments, overlapping descriptions of the same or corresponding components may be omitted. However, even if description of a component is omitted, it is not intended that such component is not included in any embodiment.

1 is a perspective view showing a foam pad raw material application gun according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view showing a foam pad raw material application gun shown in FIG. 1.

1 and 2, the foam pad raw material application gun 100 according to an embodiment of the present disclosure includes a cylinder 110 in which a foam pad raw material in a molten state is accommodated, and one end of the cylinder 110 ( A nozzle 120 coupled to 112 and discharging the foam pad raw material in a molten state, a rod 130 for opening and closing the nozzle 120 by moving along the longitudinal direction L of the cylinder 110, and a rod It includes a rod driving unit 140 for generating a driving force to move (130). The foam pad raw material application gun 100 receives the foam pad raw material in a molten state from the raw material supply unit, temporarily accommodates it in the cylinder 110, and applies the foam pad raw material in the molten state contained in the cylinder 110 to the nozzle 120 It is configured to be applied to the object to be coated (T) by discharging through it. The foam pad raw material applied to the object to be coated T is vulcanized and foamed while passing through an oven, and is transformed into a foam pad having a predetermined shape and size. The foam pad raw material is supplied in the form of a pellet in a solid state, and is melted and supplied through a raw material supply unit 200 to be described later. The object to be coated T is composed of a metal panel constituting the vehicle body. Foam pads are applied to areas with relatively irregular gaps between metal panels of a vehicle, and are used for uniform filling, adhesion, and vibration suppression.

3 is a cross-sectional view taken along line III-III of the foam pad raw material application gun shown in FIG. 1.

As shown in FIG. 3, the cylinder 110 has a hollow shape, and a molten foam pad raw material is introduced into the cylinder 110 and is temporarily accommodated. The cylinder 110 may be composed of a single part or may be composed of a plurality of parts coupled to each other. The cylinder 110 is formed with a raw material inlet 111 through which the foam pad raw material in a molten state is introduced. The raw material inlet 111 is connected to the raw material supply unit 200 through a hose or pipe.

4 is a perspective view showing the nozzle shown in FIG. 2.

The nozzle 120 is coupled to one end 112 of the cylinder 110 along the longitudinal direction L of the cylinder 110. The nozzle 120 is formed with a discharge port 120a through which the foam pad material in a molten state is discharged. The nozzle 120 has a schematic hollow cylindrical shape. For example, as shown in FIG. 4, the nozzle 120 may include a first cylindrical portion 121, a second cylindrical portion 122, a tapered portion 123, and a third cylindrical portion 124. I can.

The first cylindrical portion 121 is inserted into the one end 112 of the cylinder 110. The second cylindrical portion 122 has an outer diameter larger than that of the first cylindrical portion 121. A plurality of flat surfaces 122a may be formed on the second cylindrical portion 122 at equal intervals along the circumferential direction. In a state in which the nozzle 120 is coupled to the cylinder 110, the second cylindrical portion 122 may be disposed to be spaced apart from the lower end of the cylinder 110. The tapered portion 123 has an outer diameter that gradually decreases while going from the second cylindrical portion 122 to the third cylindrical portion 124 (along the longitudinal direction L). The third cylindrical portion 124 has a constant inner diameter and an outer diameter. A discharge port 120a is formed at one end of the third cylindrical part 124 along the longitudinal direction L. As another example, the first cylindrical portion may have an outer diameter larger than that of the second cylindrical portion, and one end of the cylinder may be configured to be inserted into the first cylindrical portion.

5 is a cross-sectional view taken along the line V-V of the foam pad raw material application gun shown in FIG. 1. 6 is a cross-sectional view of the foam pad raw material application gun shown in FIG. 5, showing a state in which the rod has a discharge port open.

5 and 6, the foam pad raw material in a molten state is introduced through the raw material inlet 111 of the cylinder 110 and flows along the longitudinal direction L of the cylinder 110, and then the nozzle It is configured to be discharged to the object to be coated (T) through the discharge port (120a) of (120).

The rod 130 is configured to open and close the discharge port 120a of the nozzle 120 by relative movement with respect to the cylinder 110 along the longitudinal direction L of the cylinder 110. The rod 130 is formed longer than the length of the cylinder 110 and is located inside the cylinder 110. For example, the rod 130 may be located in the center of the cylinder 110. One end 131 of the rod 130 is located inside the nozzle 120, and the other end 132 of the rod 130 is connected to the rod driving unit 140.

One end 131 of the rod 130 is selectively inserted into the third cylindrical portion 124 of the nozzle 120 to open and close the discharge port 120a. For example, as shown in FIG. 5, the discharge port 120a of the nozzle 120 is closed while the one end 131 of the rod 130 is inserted into the third cylindrical part 124. The foam pad raw material is cut by the rod 130 closing the discharge port 120a, and the discharge of the foam pad raw material is stopped. That is, the foam pad raw material can be cut in a state in which the nozzle 120 and the object to be coated T are not in contact with each other. Accordingly, the shape of the foam pad raw material can be maintained in a constant shape at the position where the application of the foam pad raw material is terminated, and the applied foam pad raw material is not separated from the object to be coated T. In the state where the rod 130 closes the discharge port 120a, since the molten foam pad material is not exposed to the outside, the time for solidification in the foam pad material application gun 100 increases. Accordingly, when the foam pad material application gun 100 is not in operation, the period of the purge process of periodically discharging the foam pad material in a molten state may be lengthened.

In addition, since the rod 130 closes the discharge port 120a when the application of the foam pad material is finished, it is possible to prevent the molten foam pad material from leaking through the discharge port 120a. Accordingly, there is no need for a process of removing the foam pad material leaking through the discharge port 120a. In addition, it is possible to prevent the foam pad material leaking through the discharge port 120a from falling onto the already applied foam pad material. Since the rod 130 closes the discharge port 120a, the discharge of the foam pad material may be stopped, so that the length dimension of the foam pad material to be applied may be accurate. As a result, when the foam pad raw material is applied, the defect rate may be lowered and productivity may be improved. As shown in FIG. 6, when the rod 130 moves in a direction away from the discharge port 120a, one end 131 of the rod 130 is separated from the third cylindrical part 124 and the nozzle 120 The discharge port 120a is opened. When the discharge port 120a of the nozzle 120 is opened, discharge of the foam pad material may be resumed.

The rod driving unit 140 generates a driving force that moves the rod 130. The rod driving unit 140 is disposed adjacent to the other end 113 of the cylinder 110 and is connected to the other end 132 of the rod 130. For example, the rod driving unit 140 may generate a driving force so that the rod 130 performs a reciprocating linear motion along the longitudinal direction L. As an example, the rod driving unit 140 may be configured as a hydraulic actuator that operates by supplying and discharging a fluid. As another example, the rod driving unit 140 may include an electric motor operated by supply of electric power and an electric actuator operated by a transmission mechanism that transmits rotational driving force of the electric motor.

In one embodiment, the foam pad raw material application gun 100 may further include a control unit for controlling the rod driving unit 140. The control unit may be included in the foam pad raw material application gun 100 or may be included as a part of a control unit that controls the entire operation of the foam pad raw material application device 1000 to be described later. For example, when the foam pad material is switched from a state that is not discharged through the discharge port 120a to a state that is discharged, the control unit may control the direction in which the rod 130 is away from the discharge port 120a (for example, FIGS. 5 and 6 It is possible to operate the rod driving unit 140 to move upward). Accordingly, the rod 130 is separated from the third cylindrical portion 124 of the nozzle 120, and the discharge port 120a is opened. Conversely, when the foam pad raw material is switched from being discharged through the discharge port 120a to a state not discharged, the control unit is in the direction in which the rod 130 faces the discharge port 120a (for example, downward in FIGS. 5 and 6). The rod driving unit 140 may be operated to move to ). Accordingly, the rod 130 is inserted into the third cylindrical portion 124 of the nozzle 120, and the discharge port 120a is closed. As a result, the foam pad raw material in a molten state discharged through the discharge port 120a may be cut.

In one embodiment, the foam pad raw material application gun 100 may further include a cylinder heating unit 150 disposed to surround the outer circumference of the cylinder 110 and configured to heat the cylinder 110. The cylinder heating unit 150 may be configured as a heating coil connected to a power source for supplying electric power and wound in a spiral shape on the outer circumference of the cylinder 110. The cylinder heating unit 150 prevents the foam pad raw material from solidifying before being discharged through the discharge port 120a by heating the foam pad raw material in a molten state temporarily held in the cylinder 110. Further, since the cylinder heating unit 150 is configured to heat the cylinder 110, the time for the molten foam pad raw material to be solidified in the foam pad raw material application gun 100 becomes longer. Accordingly, when the foam pad material application gun 100 is not in operation, the period of the purge process of periodically discharging the foam pad material in a molten state may be lengthened.

In one embodiment, the foam pad raw material application gun 100 may further include a cylinder cover 160 disposed to surround the outer circumference of the cylinder heating unit 150. The cylinder cover 160 serves to prevent heat generated from the cylinder heating unit 150 from being transferred to the outside. By preventing heat transfer to the outside as described above, the cylinder cover 160 can prevent the foam pad raw material application gun 100 from contacting a nearby worker or other device to damage the worker or other device. .

In one embodiment, the foam pad raw material application gun 100 is an inner peripheral surface spaced outwardly from the outer peripheral surface 125 (for example, the second cylindrical portion 122 and the tapered portion 123) of the nozzle 120 ( The nozzle cover 170 on which the 171 is formed may be further included. Due to the plurality of flat surfaces 122a formed on the nozzle 120, a space between the outer circumferential surface 125 of the nozzle 120 and the inner circumferential surface 171 of the nozzle cover 170 may be increased. The nozzle cover 170 may have a shape similar to the nozzle 120. As an example, the nozzle cover 170 may be detachably installed on the outer periphery of the cylinder heating unit 150. As another example, the nozzle cover 170 may be detachably installed on the outer circumferential surface 125 of the nozzle 120 or the outer circumference of the cylinder cover 160.

7 is a partially enlarged cross-sectional view showing a part of the foam pad raw material application gun shown in FIG. 3 on an enlarged scale.

In one embodiment, the foam pad raw material application gun 100 is a fluid heated in the space (S) between the outer peripheral surface 125 of the nozzle 120 and the inner peripheral surface 171 of the nozzle cover 170 (that is, high temperature A nozzle heater 180 (shown in FIG. 10) for supplying fluid) may be further included. The nozzle heater 180 may be installed in the foam pad raw material application gun 100, or may be installed in the foam pad raw material application device 1000 to be described later, or another separate device. A fluid inlet 172 configured to communicate with the nozzle heater 180 and the space S may be formed in the nozzle cover 170. A high-pressure hose or pipe is disposed between the fluid inlet 172 and the nozzle heater 180 so that the high-temperature fluid supplied from the nozzle heater 180 may be supplied to the space S. The high-temperature fluid supplied to the space S is stored or flows around the outer circumferential surface 125 of the nozzle 120 to heat the nozzle 120. Accordingly, the foam pad raw material in a molten state held in the nozzle 120 can be maintained in a molten state that is not solidified until immediately before being discharged through the discharge port 120a. Further, since the nozzle heater 180 is configured to heat the nozzle 120, the time for the molten foam pad raw material to be solidified in the foam pad raw material application gun 100 becomes longer. Accordingly, when the foam pad material application gun 100 is not in operation, the period of the purge process of periodically discharging the foam pad material in a molten state may be lengthened.

In one embodiment, the high-temperature fluid flowing into the space S may be configured to be discharged toward the discharge port 120a of the nozzle 120 after heating the nozzle 120. As shown in FIG. 7, the inner circumferential surface 171 of the nozzle cover 170 may include a cylindrical inner circumferential surface 171a and a tapered inner circumferential surface 171b. The cylindrical inner peripheral surface 171a is spaced apart from the first cylindrical portion 121 of the nozzle 120, and the tapered inner peripheral surface 171b is formed to be spaced apart from the tapered portion 123 of the nozzle 120. The tapered inner circumferential surface 171b may be formed shorter than the tapered portion 123. Accordingly, the high-temperature fluid introduced into the space S may be discharged into the space between the tapered inner circumferential surface 171b and the tapered portion 123 and flow along the tapered portion 123 to the vicinity of the discharge port 120a.

8 is a perspective view showing the sealing member shown in FIG. 3.

As shown in FIG. 8, in one embodiment, the foam pad raw material application gun 100 is on the opposite side of the one end 112 along the longitudinal direction L of the cylinder 110 so that the rod 130 passes. A sealing member 191 coupled to the other end 113 of the located cylinder 110 may be further included. The sealing member 191 serves as a lid for closing the other end 113 of the cylinder 110. Accordingly, the foam pad raw material in a molten state flows into the cylinder 110 through the raw material inlet 111 and does not leak to the outside of the cylinder 110 through the other end 113. A through hole 191a through which the rod 130 passes is formed in the center of the sealing member 191. Since the rod 130 is installed to penetrate the sealing member 191 at the other end 113 of the cylinder 110, the sealing member 191 has a length of the rod 130 at the other end 113 of the cylinder 110 It also serves to guide movement along the direction (L). Since the rod 130 is guided by the sealing member 191, it is possible to prevent the rod 130 from being deformed or moved in a direction perpendicular to the longitudinal direction L within the cylinder 110.

9 is a perspective view showing the guide member shown in FIG. 3.

9, in one embodiment, the foam pad raw material application gun 100 further includes a guide member 192 installed on one end 112 of the cylinder 110 so that the rod 130 penetrates. Can include. The guide member 192 is in the shape of a disk having a predetermined thickness. A rod through hole 192a through which the rod 130 passes may be formed in the center of the guide member 192. A plurality of raw material through-holes 192b arranged to be spaced apart from each other may be formed around the rod through-holes 192a. The rod through-hole 192a may be configured to communicate with each of the plurality of raw material through-holes 192b. The plurality of material through-holes 192b are flow paths through which the foam pad material passes so that the cylinder 110 and the nozzle 120 communicate with each other. Since the rod 130 is guided by the rod through hole 192a of the rod guide member 192, the rod 130 may move in a straight line along the length direction L. Accordingly, the rod 130 is more accurately inserted inside the third cylindrical portion 124 of the nozzle 120 to reliably close the discharge port 120a of the nozzle 120.

In one embodiment, the guide member 192 may be installed at one end 112 of the cylinder 110, and the sealing member 191 may be installed at the other end 113 of the cylinder 110. In this embodiment, since the rod 130 is guided and supported by both ends of the one end 112 and the other end 113 of the cylinder 110, the rod 130 is the third cylindrical part of the nozzle 120 (124) Can be inserted more accurately inside. As a result, the rod 130 can more reliably close the discharge port 120a of the nozzle 120.

In one embodiment, the inner diameter of the cylinder 110 may be configured to decrease as it approaches one end 112 of the cylinder 110. That is, the inner diameter of the cylinder 110 may be configured to gradually decrease as it goes from the other end 113 of the cylinder 110 to the one end 112. Accordingly, a rapid change in the inner diameter between the cylinder 110 and the nozzle 120 can be prevented, and the discharge pressure of the foam pad raw material in a molten state discharged through the discharge port 120a of the nozzle 120 can be increased.

10 is a perspective view showing an apparatus for applying a raw material for a foam pad according to an embodiment of the present disclosure.

As shown in FIG. 10, the foam pad raw material coating apparatus 1000 according to an embodiment of the present disclosure includes a foam pad raw material application gun 100 and a raw material supply unit 200. Since the foam pad raw material application gun 100 has the same or similar configuration as the foam pad raw material application gun 100 according to the embodiment shown in FIGS. 1 to 9, the raw material supply unit 200 will be mainly described below. . In FIG. 10, the foam pad raw material application gun 100 is installed in the foam pad raw material application device 1000 so as to form about 90° with respect to the object T, but the foam pad raw material application gun 100 is avoided. It may be installed in the foam pad raw material coating apparatus 1000 at various angles such as about 45° or 0° with respect to the application object T.

As an example, the foam pad raw material coating apparatus 1000 is fixed to a cradle and configured to discharge foam pad raw materials to a predetermined application area, and the object to be coated T may be mounted on the robot device. Foam pad raw material while moving the object to be coated (T) to fit the application area of the application device 1000 to the area to be coated of the object to be coated (T) while the robot device is holding the object (T) The coating device 1000 may be configured to apply the foam pad raw material to the object T to be coated. As another example, the object to be coated T is fixed to the cradle, and the foam pad raw material application device 1000 may be mounted on the robot device. While the robot device is equipped with the foam pad raw material application device 1000, the foam pad raw material application device 1000 is moved to match the application area of the foam pad raw material application device 1000 to the application area of the object T. While the foam pad raw material application device 1000 may be configured to apply the foam pad raw material to the object (T) to be coated.

The raw material supply unit 200 is configured to supply the foam pad raw material in a molten state to the foam pad raw material application gun 100. For example, the raw material supply unit 200 may be configured to melt the foam pad raw material in a solid state (eg, in the form of pellets) to supply the foam pad raw material in the molten state to the foam pad raw material application gun 100.

11 is a cross-sectional view taken along line XI-XI of the foam pad raw material coating apparatus shown in FIG. 10.

As shown in FIG. 11, in one embodiment, the raw material supply unit 200 may include a hopper 210, a barrel 220, a screw 230, and a screw driver 240.

The hopper 210 serves to supply the solid foam pad raw material into the barrel 220 by inputting the foam pad raw material in the solid state. A shutter configured to allow or block the supply of the foam pad material in a solid state may be installed between the hopper 210 and the barrel 220.

The barrel 220 is configured to melt the solid foam pad raw material supplied through the hopper 210, and serves as a chamber for melting the solid foam pad raw material. One or more barrel heaters may be disposed outside the barrel 220 to melt the foam pad material inside the barrel 220.

The screw 230 is configured to pressurize the foam pad raw material in a molten state within the barrel 220 to the foam pad raw material application gun 100. The screw 230 transfers the foam pad raw material in a molten state within the barrel 220 from a position adjacent to the hopper 210 to a position adjacent to the foam pad raw material application gun 100. The screw 230 may include a shaft 231 and a blade 232. The shaft 231 is configured to rotate in place by a screw drive unit 240. The blades 232 are arranged helically in the circumferential direction of the shaft 231. In the blade 232, as the shaft 231 rotates in place, the foam pad material in a molten state is pressurized along the direction of the spiral.

The screw driving unit 240 is configured to rotate the screw 230. For example, the screw driver 240 may be configured with an electric motor. As an example, a reduction gear 250 may be disposed between the screw driver 240 and the shaft 231 of the screw 230. When the reduction gear 250 is provided, even when the rotation torque of the screw driving unit 240 is low, it is possible to smoothly pressurize the foam pad material having a very high viscosity in a molten state. As another example, the screw driving unit 240 may be directly connected to the shaft 231 of the screw 230 and configured to rotate the screw 230. In this case, the screw driving unit 240 may have a high rotation torque.

In one embodiment, the raw material supply unit 200 may further include one or more cooling units 260 disposed outside the barrel 220 and cooling heat generated by rotation of the screw 230. As the screw 230 rotates within the barrel 220, heat due to friction and compression may be generated. For example, as the foam pad material rubs against the inner wall surface of the barrel 220 and the blade 232, heat due to friction may be generated in the foam pad material. In addition, as the blade 232 transfers the foam pad material within the barrel 220, heat may be generated due to a compressive force acting on the foam pad material. The cooling unit 260 is configured to cool this heat. As an example, the plurality of cooling units 260 may be configured as cooling fans and disposed outside the barrel 220 to be spaced apart from each other along the longitudinal direction of the barrel 220.

In one embodiment, the foam pad raw material application apparatus 1000 further includes one or more plasma heating units 300 mounted on the foam pad raw material application gun 100 to face the discharge port 120a of the nozzle 120. I can. The plasma heating unit 300 may be mounted on the foam pad raw material application gun 100 through the bracket 310. The plasma heating unit 300 includes a nozzle 320 configured to discharge air plasma at an end portion along the length direction. Depending on the type and size of the foam pad material to be applied, nozzles 320 of various shapes and sizes may be selectively mounted on the plasma heating unit 300. The plasma heating unit 300 is configured to preheat the object to be coated T immediately before the foam pad raw material is applied by using air plasma. In this way, by heating the target object T in advance by the plasma heating unit 300, the target object T (for example, a metal panel) is manufactured in a manufacturing process (for example, a press process). Oil contained on the surface of the object T can be removed. In addition, by heating the object to be coated (T) to a predetermined temperature range (for example, about 60 ~ 80 ℃), the object to be coated (T) made of different materials (for example, a metal material) and a foam pad It is possible to improve adhesion between raw materials (for example, rubber materials). The number of plasma heating units 300 may be appropriately selected according to the size and type of the foam pad material to be applied or the size and type of the object T to be coated.

In one embodiment, the plasma heating unit 300 may be disposed to be inclined at a predetermined angle (eg, about 30° or more) with respect to the foam pad raw material application gun 100. Accordingly, the heating region of the air plasma discharged from the nozzle 320 of the plasma heating unit 300 is adjacent to the application region of the foam pad raw material discharged from the nozzle 120 of the foam pad raw material application gun 100. As the heating region of the air plasma is adjacent to the application region of the foam pad raw material, the adhesion between the object to be coated T and the foam pad raw material may be further improved. When a plurality of plasma heating units 300 are applied to the foam pad raw material coating apparatus 1000, the heating regions of the air plasma discharged from the nozzle 320 of the plasma heating unit 300 are arranged to coincide with each other, The heating region may be disposed adjacent to the application region of the foam pad raw material discharged from the nozzle 120 of the foam pad raw material application gun 100.

12 is a flowchart schematically illustrating a method of applying a raw material for a foam pad according to an embodiment of the present disclosure.

Although process steps, method steps, algorithms, and the like have been described in sequential order in the flowchart shown in FIG. 12, such processes, methods, and algorithms may be configured to operate in any suitable order. In other words, the steps of the processes, methods, and algorithms described in various embodiments of the present disclosure need not be performed in the order described in this disclosure. Further, although some steps are described as being performed asynchronously, in other embodiments, some of these steps may be performed simultaneously. Further, the illustration of the process by depiction in the drawings does not imply that the illustrated process excludes other changes and modifications thereto, and the illustrated process or any of its steps are among the various embodiments of the present disclosure. It does not imply that it is essential to one or more, and does not imply that the illustrated process is desirable.

As shown in Figure 12, the foam pad raw material coating method (S100) according to an embodiment of the present disclosure includes a raw material supply step (S110), a melting step (S120), a pressure feeding step (S130), an application step (S140), And a cutting step (S150).

In the raw material supply step (S110), the foam pad raw material in a solid state (eg, in the form of pellets) is supplied through the hopper 210 of the foam pad raw material application device 1000. The foam pad raw material may be supplied to the hopper 210 in advance before the start of the foam pad raw material application process, or may be continuously supplied to the hopper 210 during the foam pad raw material application process.

In the melting step (S120), the solid foam pad raw material supplied through the hopper 210 is melted in the barrel 220 through one or more barrel heaters installed outside the barrel 220.

In the pressure feeding step (S130), the foam pad raw material in a molten state melted in the barrel 220 is pressure fed to the foam pad raw material application gun 100 through the screw 230. As the foam pad material in the molten state rotates, the screw 230 is pressed from a position adjacent to the hopper 210 to a position adjacent to the foam pad material application gun 100 in the barrel 220. In one embodiment, the melting step (S120) and the pressure feeding step (S130) may be performed at the same time.

In the application step (S140), the foam pad raw material in a molten state that has been pushed to the foam pad raw material application gun 100 is discharged through the foam pad raw material application gun 100 and applied to the object to be coated (T). As an example, in the application step (S140), the object to be coated (T) gripped by the robot device is foamed while moving the region to be coated of the object (T) to fit the application region of the foam pad raw material application device (1000). The pad raw material application device 1000 may be configured to apply the foam pad raw material to the object T to be coated. As another example, in the application step (S140), the foam pad raw material application device 1000 while moving the application region to fit the region to be coated of the object T to be applied, the foam pad raw material application device 1000 mounted on the robot device. It may be configured to apply the foam pad raw material to the object to be coated (T).

In the cutting step (S150), the foam pad raw material is configured to cut the foam pad raw material in a molten state by closing the discharge port 120a of the nozzle 120 through the rod 130 of the foam pad raw material application gun 100. I can. The cutting step (S150) is discharged through the discharge port 120a by moving the rod 130 toward the nozzle 120 by the operation of the rod driving unit 140 and inserting the rod 130 into the nozzle 120. It is configured to cut the foam pad raw material in a molten state. Since the foam pad raw material can be cut in a non-contact state between the nozzle 120 and the object to be coated (T), the foam pad raw material can maintain a uniform shape at the position where the application of the foam pad raw material is terminated, and the applied foam pad The raw material is not separated from the object to be coated (T). In addition, since the rod 130 closes the discharge port, the discharge of the foam pad material may be stopped, so that the length dimension of the applied foam pad material may be accurate. As a result, when the foam pad raw material is applied, the defect rate may be lowered and productivity may be improved.

In one embodiment, the applying step (S140) may include heating the cylinder 110 through the cylinder heating unit 150 disposed to surround the outer periphery of the cylinder 110. By heating the cylinder 110 from the outside, the foam pad raw material is not solidified in the cylinder 110 and can be maintained in a molten state.

In one embodiment, in the application step (S140), the nozzle 120 is supplied to the space (S) between the outer peripheral surface 125 of the nozzle 120 and the inner peripheral surface 171 of the nozzle cover 170. It may include heating. By heating the nozzle 120 from the outside, the foam pad raw material is not solidified in the nozzle 120 until immediately before being discharged to the object to be coated T, and the molten state can be maintained.

In one embodiment, the foam pad raw material application method (S100) may further include a heating step of the object to be coated (T). In the heating step of the object to be coated (T), the object to be coated (T) to which the foam pad raw material in a molten state is applied is heated through one or more plasma heating units 300 mounted on the foam pad raw material application gun 100. .

In one embodiment, the heating step (S160) of the object to be coated (T) may be performed before the applying step. By heating the target object T to be coated in advance by the plasma heating unit 300, the target object T in the manufacturing process (eg, a press process) of the target object T (for example, a metal panel) The oil contained on the surface of) can be removed. In addition, by heating the target object T to a predetermined temperature (for example, about 60°C or higher), the target object T (for example, a metal material) made of different materials and a foam pad raw material ( For example, it is possible to improve the adhesion between the rubber material).

In one embodiment, the foam pad raw material application method (S100) is a foam pad raw material application gun 100 by continuously executing the pressure-feeding step (S130) in a state in which the rod 130 closes the discharge port 120a of the nozzle 120. It may further include a pre-pressure step of increasing the pressure of the foam pad raw material in the molten state stored in). By increasing the pressure of the foam pad raw material in the molten state stored in the foam pad raw material application gun 100 to a predetermined discharge pressure required for the application of the foam pad raw material, the time required for preparing the application of the foam pad raw material can be shortened. I can. As a result, the productivity of the application operation of the foam pad raw material can be improved.

Although the technical idea of the present disclosure has been described with reference to some embodiments and examples shown in the accompanying drawings above, it does not depart from the technical idea and scope of the present disclosure that can be understood by those of ordinary skill in the art to which this disclosure belongs. It will be appreciated that various substitutions, modifications and changes may be made in the range. In addition, such substitutions, modifications and changes are to be considered as falling within the scope of the appended claims.

100: foam pad raw material application gun, 110: cylinder, 120: nozzle, 130: rod, 140: rod driving part, 150: cylinder heating part, 160: cylinder cover, 170: nozzle cover, 180: nozzle heater, 191: sealing member , 192: guide member, 200: raw material supply unit, 210: hopper, 220: barrel, 230: screw, 240: screw driving unit, 250: reduction gear, 260: cooling unit, 300: plasma heating unit, 310: bracket, 320 : Nozzle, 1000: foam pad raw material application device, S100: foam pad raw material application method

Claims (19)

A hollow cylinder in which the foam pad material in a molten state is introduced and temporarily accommodated;
A nozzle coupled to one end portion along the longitudinal direction of the cylinder and having a discharge port through which the foam pad material in the molten state is discharged;
A rod configured to open and close the discharge port of the nozzle by relative movement with respect to the cylinder along the longitudinal direction of the cylinder;
A rod driving unit generating a driving force for moving the rod; And
A guide member disposed adjacent to the nozzle at the one end of the cylinder so that the rod penetrates
Including,
The foam pad raw material in the molten state discharged through the discharge port is cut by the rod closing the discharge port, the foam pad raw material application gun. The method of claim 1,
Arranged to surround the outer circumference of the cylinder and further comprising a cylinder heating unit configured to heat the cylinder, foam pad raw material application gun. The method of claim 2,
Further comprising a cylinder cover disposed to surround the outer circumference of the cylinder heating unit, foam pad raw material application gun. The method of claim 1,
The foam pad raw material application gun further comprising a nozzle cover formed with an inner circumferential surface spaced outwardly from the outer circumferential surface of the nozzle. The method of claim 4,
Further comprising a nozzle heater for supplying a heated fluid to the space between the outer peripheral surface of the nozzle and the inner peripheral surface of the nozzle cover, foam pad raw material application gun. The method of claim 1,
The foam pad raw material application gun further comprising a sealing member installed at the other end of the cylinder positioned opposite the one end along the longitudinal direction of the cylinder so that the rod penetrates. delete The method of claim 1,
The inner diameter of the cylinder is configured to decrease closer to the one end portion of the cylinder, foam pad raw material application gun. The foam pad raw material application gun according to any one of claims 1 to 6 and 8; And
A raw material supply unit for supplying the foam pad raw material in the molten state to the foam pad raw material application gun
Foam pad raw material application device comprising a. The method of claim 9,
The raw material supply unit,
A hopper into which a raw material for a foam pad in a solid state is added;
A barrel for melting the raw material of the foam pad in the solid state input through the hopper;
A screw for pressurizing the foam pad raw material in a molten state within the barrel to a foam pad raw material application gun; And
Screw driving unit configured to rotate the screw
Containing a foam pad raw material application device. The method of claim 10,
The raw material supply unit further comprises at least one cooling unit disposed outside the barrel and cooling heat generated by rotation of the screw. The method of claim 9,
Further comprising one or more plasma heating units mounted on the foam pad raw material application gun so as to face the discharge port of the nozzle. The method of claim 12,
The plasma heating unit is disposed obliquely at a predetermined angle with respect to the foam pad raw material application gun. A raw material supply step of supplying a raw material for a foam pad in a solid state through a hopper;
A melting step of melting the solid foam pad raw material supplied through the hopper in a barrel;
A pressure-feeding step of pressurizing the foam pad raw material melted in the barrel to a foam pad raw material application gun through a screw;
An application step of applying the foam pad raw material in the molten state, which is pressurized to the foam pad raw material application gun, to an object to be coated through the foam pad raw material application gun; And
Cutting step of cutting the foam pad raw material in the molten state by closing the discharge port of the nozzle through the rod of the foam pad raw material application gun
Including,
The foam pad raw material application gun includes a hollow cylinder in which the foam pad raw material in the molten state is introduced and temporarily accommodated, and a guide member disposed adjacent to the nozzle at one end of the cylinder so that the rod penetrates,
In the cutting step, the rod is configured to pass through the guide member and inserted into the discharge port. delete The method of claim 14,
The foam pad raw material application gun includes a nozzle cover that is spaced outward from an outer peripheral surface of the nozzle to form an inner peripheral surface,
The applying step includes heating the nozzle by supplying a heated fluid to a space between an outer circumferential surface of the nozzle and an inner circumferential surface of the nozzle cover. The method of claim 14,
The method of applying a foam pad raw material further comprising heating the object to be coated to which the foam pad raw material in the molten state is applied through one or more plasma heating units mounted on the foam pad raw material application gun. The method of claim 17,
The heating step of the object to be coated is performed before the applying step. The method of claim 14,
Further comprising a pre-pressure step of increasing the pressure of the molten foam pad raw material stored in the foam pad raw material application gun by continuously executing the pressure feeding step while the rod closes the discharge port of the nozzle. .

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