KR101803748B1 - Discharging apparatus for silicone adhesive for asseembling automotive components - Google Patents

Abstract

The present invention relates to a sealer discharging device for vehicle components. The device includes: a nozzle head combined with a nozzle body and a first chamber connected to a discharge passage in the nozzle body; a cartridge attached to a side of the nozzle body, and including second, third, and fourth chambers arranged at a predetermined distance; a guide installed between the first chamber and the second chamber, and including a sealer guide passage; a plunger installed to be able to be moved along the sealer guide passage of the guide; a piston including a piston rod combined in the longitudinal direction of the plunger; a piston holder supported in an initial position by the elastic force of an elastic member; and a heater attached to the outer side of the cartridge, and including a circulation passage connected to the sealer guide passage and a heating bar installed in at least one part of the circulation passage to be heated by an external power supply. The sealer discharging device is capable of returning a sealer of an adhesive to the inside of the nozzle through a snapback function when being stopped or not being used, safely and efficiently making a heat exchange between the heater and the adhesive, and improving assembly performance.

Description

TECHNICAL FIELD [0001] The present invention relates to a sealer ejecting apparatus for automobile parts,

More particularly, the present invention relates to a sealer dispenser for automobile parts, and more particularly, to a sealer dispenser for automobile parts, And more particularly to a sealer discharging device for an automotive part having improved assembling performance.

As one of the well-known technologies in the past, there is disclosed a sealer discharge automation apparatus including a silicone oil for automobile which is patented by Hyundai Motor Co., This technology can automatically discharge the joint agent of the sealer while maintaining a certain distance between the sealer ejector and the glass surface in the process of joining an automobile glass to an automobile structure, It is also very useful for assembly process. Such a bonding agent can maintain the required viscosity in the temperature range of approximately 30 to 35 degrees in use and if the temperature is not properly maintained the viscosity will increase or decrease to adversely affect the bonding agent discharge speed through the nozzle head .

Therefore, in order to adjust the temperature, a predetermined water heater is applied to the discharge gun, and a bonding agent heating method in which heat exchange with the bonding agent is performed is widely utilized.

However, such conventional water heating schemes require structurally localized heat transfer and therefore require placement and individual temperature control over the junction supply line in multiple sections, thereby complicating cost rise and control or management elements.

Furthermore, in the conventional water heating system, the water circulation units must be separately designed and constructed. In addition, due to the construction of the heat transfer medium and the heat transfer medium using water, a safety accident of electric shock occurs in the process of joining or using the structure There is a disadvantage that it is very susceptible to corrosion of the nozzle and the joining agent supply element.

On the other hand, when the discharge gun is stopped or not in use, the adhesive agent remains on the discharge port of the nozzle head, and the adhesive agent is hardened in the remaining state, thereby frequently causing a problem of clogging of the discharge port. Also, in terms of maintenance, it is very important to design and design the apparatus considering the assembling and disassembling performance thereof, since some parts of the discharge apparatus are periodically required maintenance or replacement work.

Korean Patent Publication No. 10-2003-0013959 (Feb. 15, 2003) Korean Patent Registration No. 10-1590410 (2016.01.26)

The disclosed invention provides a sealer ejecting apparatus for an automotive part in which a bonding agent is retained in a nozzle during stop operation or non-use, and heat exchange of the heater with respect to the bonding agent is performed safely and efficiently.

In addition, the disclosed invention provides a sealer ejecting apparatus for an automotive part having a modular structure in which disassembly and assembly are easily performed for each component for maintenance.

As a technical feature,

A nozzle body including a nozzle body having a discharge passage of a sealant, a nozzle head having a discharge port communicating with the discharge passage, the nozzle head being coupled to the nozzle body, and a first chamber communicating with the discharge passage in the nozzle body; A cartridge attached to one side of the nozzle body and having a second chamber, a third chamber, and a fourth chamber disposed at predetermined intervals in the chamber; A guide installed between the first chamber and the second chamber and having a sealer guide passage therein; A plunger movably installed along the sealer guide passage of the guide and having a pressure receiving head selectively opening and closing the guide passage; A piston slidably installed in the third chamber such that a suction pressure for sucking the sealant remaining in the discharge port is formed in the second chamber, the piston rod being coupled to the longitudinal end of the plunger; An elastic member mounted in the fourth chamber; A piston rod fixed to an end of the connecting rod and supported at an initial position by an elastic force of the elastic member; And a heater attached to an outer side of the cartridge, the heater including a circulation passage communicated with the sealer guide passage and a heating bar installed at least a part of the circulation passage and heated by an external power source, to provide.

Preferably, the heater includes a heating plate covering the circulation passage.

More preferably, the heater comprises a temperature detection sensor for sensing the temperature of the flowing sealer convecting the circulation passage.

For disassembly and assembly performance, the nozzle body and the heater are secured to the cartridge by bolting, and the guide may be secured to the first or second chamber in the O-ring.

According to the disclosed technology, the sealer remaining on the discharge port of the nozzle head during the stop operation or non-use is sucked and held in the first chamber of the nozzle body and the second chamber of the cartridge body by the suction pressure formed in the second chamber The clogging of the discharge port is prevented.

In addition, according to the disclosed technology, heat exchange is performed between the heat source provided by the heating bar and the heating plate and the sealer flowing in the circulation passage, and the temperature detection for the sealer in the circulation passage is performed, Is efficiently detected.

Further, the disclosed invention is advantageous in that workability and assemblability can be greatly improved since it is possible to easily disassemble the bolt and O-ring when the nozzle body, the heater, or the internal parts of the cartridge are required to be maintained.

1 is a schematic view showing an assembly state of a sealer discharging device for an automotive part according to an embodiment of the present invention,
FIG. 2A is a partial cross-sectional perspective view schematically showing a partial cross-sectional state along the line AA shown in FIG. 1,
FIG. 2B is a cross-sectional view schematically showing a cross-sectional state along the line AA shown in FIG. 1,
3 is an exploded perspective view of a heater according to an embodiment of the present invention,
4 is a schematic view showing a state in which the robot arm for a bonding agent dispensing apparatus is assembled according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention and physical properties of the respective components will be described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto, And this does not mean that the technical idea and scope of the present invention are limited.

The disclosed sealer dispensing apparatus for an automotive part includes a nozzle 10, a cartridge 20, and a heater 30. As shown in Fig. Preferably, the nozzle 10 has a nozzle body 1 having a sealant discharge passage 2 and a discharge port 3 communicating with the discharge passage 2, and the nozzle body 1 And a first chamber (5) communicating with the discharge passage (2) inside the nozzle body (1).

The nozzle head 4 is coupled to the outer end of the discharge passage 2 in a bolting manner by the nozzle chuck 6 and is fixed to the nozzle body 1. The nozzle chuck 6 can be deformed by a known tapering fixing method.

The cartridge 20 includes a second chamber 21, a third chamber 22, and a fourth chamber 23, which are attached to one side of the nozzle body 2 and are disposed at predetermined intervals from the inside of the nozzle body 2 . The inside of the second chamber 21 and the inside of the third chamber 22 may be filled with sealer or silicone oil as a bonding agent, and a structure in which the respective internal spaces communicate with each other may affect the supply pressure to the bonding agent and the suction pressure Lt; / RTI >

The guide 24 is installed between the first chamber 5 and the second chamber 21 and includes a sealer guide passage 25 therein. Ring may be further provided on the outer circumferential surface of the guide 24 and the O-ring may be provided on the inner wall surface of each of the first chamber 5 and the second chamber 21 by the O- The outer circumferential surface of the outer circumferential surface 24 is fixedly held.

The plunger 27 includes a pressure receiving head 28 movably installed along the sealer guide passage 25 of the guide 24 and selectively opening and closing the guide passage 25 . The plunger (27) includes a threaded portion (29) at an end extending along the longitudinal direction from the back surface of the hydraulic head (28).

The piston (11) has a piston rod (8) coupled to a longitudinal end of the plunger (27), and a suction pressure for sucking the sealant remaining in the discharge port is formed in the second chamber Is slidably mounted within the third chamber (22).

2, it is understood that one end of the piston rod 8 is fastened to the threaded portion 29 and the other end thereof is fastened to the coupling portion of the connecting rod 9 of the piston holder 12 will be. Also, although the piston rod 8 and the connecting rod 9 are shown as being separated from each other, it can be understood that the piston rod 8 and the connecting rod 9 are mutually deformable.

The elastic member 13 is mounted to the fourth chamber. The elastic member 13 may be a spring installed on the first sleeve 14 installed in the fourth chamber 23. The piston holder 12 is fixed to an end portion of the connecting rod 9 coupled to the piston rod 8 and is supported at an initial position by an elastic force of the elastic member 13.

The heater (30) is attached to one side of the main body of the cartridge (20). The heater 30 may include a circulation passage 31 communicating with the sealer guide passage 25 and a heating bar 32 installed at least a part of the circulation passage 31 and heated by an external power source . The circulation passage 31 includes a geometrical structure including a linear circulation passage 31a and a curved circulation passage 31b set in advance within the heater body 33 and the curved circulation passage 31b is connected to the cartridge 20 so that a sealer heated by heat exchange with the heating bar 32 conveys the cartridge inner wall through the circulation passages 31a, 31b.

The diameter and the curved direction of each of the curved and linear circulation passages communicating with the heater body 33 and the inner wall of the cartridge 20 can be varied within the cartridge body.

The heater 30 includes a heating plate 34 disposed inside the heater body 33 and covering the circulation passage 31. It is sufficient that the heating plate 34 covers at least a part of the circulation passage 31 and the circulation passage 31 is partially formed by the heating bar 32 or the heating plate 34). The circulation passage 31 may communicate with a sealer supply port 35 and an air hole 36 formed on the outside of the heater body 33 of the heater 30, It should be understood that the present invention can be applied not only as a function for supplying the sealer but also as an interface for adjusting the sealer injection amount or the emission amount preset on the passages for discharging the sealer in case of non-operation or non-use.

The temperature detection sensor 37 is configured inside the heater 30 to sense the temperature of the circulating or flowing sealer circulating through the circulation passage 31. The temperature detection sensor 37 may be installed in a linear or curved passage of the circulation passage 31 and may detect the temperature of the sealer and provide a detection signal to an external controller .

The nozzle body 1 and the body 33 of the heater 30 are fixed to the cartridge 20 by bolting and the guide 24 is fixed to the O- To the first chamber (5) and the second chamber (22).

The sealer of the bonding agent can be discharged through the discharge port of the nozzle head during the operation or use of the disclosed sealer discharging device for joining the automotive parts.

For example, in supplying the sealer, the sealer is heated to a preset temperature in the circulation passage 31a by heat exchange with the heating bar 32. [ The heated sealer continuously passes through the curved circulation passage 31b and forms a heat exchange with the inner wall of the cartridge 20 and the second chamber 22 while convectively flowing. At this time, the sealer filled in the second chamber 22 is heated through the above-described heat exchange. The seal head of the plunger 27 is released from the sealer guide passage 25 of the guide 24 in the sealer state heated to a predetermined temperature by the convection circulation and heat exchange of the sealer described above, Is discharged through the chamber 5 through the sealer discharge passage 2 and the discharge port 3 of the nozzle head.

The sealer remains on the discharge port 3 of the nozzle head 4 during the non-operation or non-use of the nozzle body 4 and the remaining or discharged sealer is transferred to the first chamber 5 of the nozzle body 1 or the cartridge 20 ) Of the second chamber (22). This description of the technique may be interpreted as a snapback function.

For example, the sealer, which remains or remains on the discharge port 3 or the sealer discharge passage 2 during the off operation through the sealer gun robot arm 40 for the non-operation or non-use, The piston 11 is moved in the range of the predetermined section toward the right side in the drawing by the elastic force of the spring 13 which provides the elasticity to the initial position. At this time, a suction pressure is formed in the first chamber 5 corresponding to the volume change of the second chamber 22, and the suction pressure or the suction pressure of the second chamber 22 is maintained at the discharge port 3 or the sealer discharge passage 5 The sealer momentarily returns to the first chamber 5 of the nozzle body 1 or the second chamber 22 of the cartridge. Accordingly, clogging of the discharge port is prevented.

According to the disclosed invention, the sealer of the bonding agent heated to a suitable temperature by applying the cartridge-coupled heater can have a convective flow along the circulation passage, and unlike the water heater, electrical contact with water is eliminated, It can be applied very effectively to the field of joining of automobile parts.

10: Nozzles
20: Cartridge
30: Heater

Claims (5)

A nozzle body including a nozzle body having a discharge passage of a sealant, a nozzle head having a discharge port communicating with the discharge passage, the nozzle head being coupled to the nozzle body, and a first chamber communicating with the discharge passage in the nozzle body;
A cartridge attached to one side of the nozzle body and having a second chamber, a third chamber, and a fourth chamber disposed at predetermined intervals in the chamber;
A guide installed between the first chamber and the second chamber and having a sealer guide passage therein;
A plunger movably installed along the sealer guide passage of the guide and having a hydraulic head selectively opening and closing the guide passage;
A piston slidably installed in the third chamber such that a suction pressure for sucking the sealant remaining in the discharge port is formed in the second chamber, the piston rod being coupled to the longitudinal end of the plunger;
An elastic member mounted in the fourth chamber;
A piston rod fixed to an end of the connecting rod and supported at an initial position by an elastic force of the elastic member;
And a heater attached to one side of the main body of the cartridge and including a circulation passage communicated with the sealer guide passage and a heating bar installed at least a part of the circulation passage and heated by an external power source, And a curved circulation passage formed to pass through the inner wall of the cartridge so that the sealer passes through an inner wall of the heater and the cartridge to form a convection flow, .
The method according to claim 1,
Wherein the heater includes a heating plate installed inside the heater body to cover the circulation passage for heat exchange.
The method of claim 2,
Wherein the heater includes a temperature detecting sensor for sensing a temperature of a flowing sealer circulating through the circulation passage.
The method according to claim 1,
Wherein the nozzle body and the heater are fixed to the cartridge by bolting.
The method according to claim 1,
And the guide is inserted and fixed in the first chamber or the second chamber in the O-ring.

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