KR20190134161A - Heat welding apparatus for combining plastic fuel tank and plastic parts - Google Patents

Abstract

The present invention relates to a thermal welding device for bonding a plastic fuel tank and plastic parts, in which the center of a plastic part (1) clamped to a gripper (10), a center of a part heater (20), and a center of a tank heater (30) are located on a straight line (L1) in the vertical direction based on an initial state before operation. The work to heat a welding surface (1a) of the plastic part (1) only by the vertical movement of the gripper (10) and the thermal welding bonding which moves plastic part (1) in which the welding surface (1a) is heated to a welding portion are possible.

Description

Heat welding device for bonding plastic fuel tank and plastic parts {HEAT WELDING APPARATUS FOR COMBINING PLASTIC FUEL TANK AND PLASTIC PARTS}

The present invention relates to a thermal welding device for joining a plastic fuel tank and a plastic part, and more particularly, to a thermal welding for joining a plastic fuel tank and a plastic part, which can improve the quality performance of the thermal welding by shortening a working cycle. Description of the device.

In general, the engine of a vehicle is a device that converts thermal energy into mechanical rotational force by rotating the crankshaft by using the explosive force generated by burning fuel in the combustion chamber.

Such an engine must be continuously supplied with fuel to be burned in the combustion chamber, the vehicle is provided with a fuel tank for storing a certain amount of fuel for the continuous supply of fuel.

The fuel tank is usually made of steel and plastic, but recently, the use of plastic fuel tanks is increasing for weight reduction and fuel economy improvement.

The plastic fuel tank is largely manufactured through a melting process, an extrusion process, and a blowing process. The melting process is a process of heating a plastic material at a high temperature to melt the molten resin, and the extrusion process is a C-type or twin sheet ( It is a process of extruding into a parison such as twin sheet) and a cylindrical shape, and the blowing process is to form a parison into a shape of a fuel tank by inserting the parison into a mold and blowing high pressure air into the parison. It is a process to do it.

As described above, the plastic fuel tank manufactured through the blowing process is cooled, and then various plastic parts such as valves are combined by heat fusion.

On the other hand, the thermal fusion bonding of the plastic part is carried out by a thermal fusion device, the thermal fusion device comprises a gripper for clamping the plastic part, the fuel tank and the tank heater and the part heater for heating the plastic part.

Therefore, by heating and fusing the fusion surface of the fuel tank and the plastic component by using a tank heater and a component heater, the plastic fuel melted by melting the fusion surface by moving to the fusion portion of the fuel tank and thermally fusion-bonded. The combination of the tank and plastic parts is made.

Typically, when the plastic parts are heat-sealed by using a heat welding device, the plastic fuel tank is positioned below and the heat welding device is located above the fuel tank.

Therefore, in order to minimize the time required for the heat welding operation, the components of the heat welding apparatus may be simply removed when the welding surface of the plastic parts is heated using a heater or the plastic parts heated with the welding surface are moved to the welding portion of the fuel tank. It will be most efficient to move only up and down.

By the way, the conventional heat welding apparatus needs to rotate the gripper or move the gripper from side to side in order to heat the fusion surface of the plastic part, and also move the plastic part with the fusion surface heated to the fusion portion of the fuel tank. When moving, the movement to the left and right is required, and thus, there is a disadvantage in that the working time required for heat fusion bonding is lengthened as the rotation and the left and right movement are added in addition to the movement in the vertical direction. There is a disadvantage in that the probability of joining is increased, and as a result, the bad bonding rate is increased.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

Republic of Korea Patent Publication No. 10-2009-0060809

The present invention is a configuration capable of heating the fusion surface of the plastic parts only by the vertical movement of the gripper and the operation of moving the heated plastic parts to the fusion portion of the fuel tank, the working time required for thermal fusion bonding It is an object of the present invention to provide a plastic fuel tank and a heat fusion device for joining plastic parts that can shorten the temperature and improve the quality performance of the heat fusion bonding.

In order to achieve the above object, the present invention provides a heat welding apparatus for joining a plastic fuel tank and a plastic part, the gripper clamping the plastic part; A component heater for heating the fusion surface of the plastic component clamped to the gripper; A tank heater for heating the welded portion of the plastic fuel tank; The gripper, the component heater, and the tank heater are sequentially positioned from top to bottom along a straight line in the vertical direction; In the state in which the fusion portion of the plastic fuel tank is located below the vertical direction of the tank heater is characterized in that the thermal fusion bonding operation of the plastic parts is in progress.

A gripper cylinder operative to raise and lower the gripper; A component heater cylinder connected to the component heater; A tank heater cylinder connected to the tank heater; A moving body to which the component heater cylinder and the tank heater cylinder are connected together; And a servo cylinder operative to raise and lower the component heater cylinder and the tank heater cylinder at the same time as the movable body moves up and down.

A fixed body to which the gripper cylinder and the servo cylinder are fixedly coupled; And a rail mechanism for guiding the vertical movement of the movable body while connecting the fixed body and the movable body; The servo cylinder is positioned at the rear side of the gripper cylinder, and the gripper cylinder and the servo cylinder are installed in parallel up and down.

The component heater cylinder and the tank heater cylinder are fixed to the moving body so as to face each other by being spaced from side to side; The component heater cylinder and the tank heater cylinder operate simultaneously; By the simultaneous operation of the component heater cylinder and the tank heater cylinder, the component heater and the tank heater are positioned on a straight line in the vertical direction and are stacked up or down or spaced apart from each other based on a straight line in the vertical direction.

The plastic parts are clamped by the simultaneous operation of the gripper cylinder and the servo cylinder in a state in which the fusion part of the plastic fuel tank and the plastic parts clamped to the tank heater, the part heater and the gripper are sequentially positioned along the vertical straight line. The gripper and the moving body descend together; The fusion surface and the tank heater of the plastic component clamped to the gripper by the lowering of the gripper and the moving body are in contact with the fusion portion of the component heater and the plastic fuel tank, respectively, and simultaneously heat the fusion surface of the plastic component and the fusion portion of the plastic fuel tank. It is characterized by melting.

After melting of the fusion surface of the plastic part and the fusion part of the plastic fuel tank is finished, the plastic part moves to the upper side of the component heater and is spaced apart by the operation of the gripper cylinder and the servo cylinder, and the tank heater is moved to the upper side of the fusion part of the plastic fuel tank. Move away; As the component heater and the tank heater move left and right by the simultaneous operation of the component heater cylinder and the tank heater cylinder, an interval between the component heater and the tank heater is widened; The plastic part clamped to the gripper is lowered through the gap between the part heater and the tank heater by the operation of the gripper cylinder, and the fusion surface of the lowered plastic part is in thermal contact with the fusion part of the plastic fuel tank. It features.

The heat welding apparatus according to the present invention is configured such that the center of the plastic part clamped to the gripper, the center of the part heater, and the center of the tank heater are located in a straight line in the vertical direction, based on the initial state before the operation. It is possible to heat-bond by heating the welding surface of the plastic parts only by vertical movement and by moving the heated plastic parts to the welding part of the fuel tank, resulting in shortening of the working time required for the thermal welding. Since the work cycle can be shortened, there is an effect that the quality performance of the heat-sealed bond can be improved.

1 to 3 is a front view, a side view and a perspective view of a heat welding apparatus according to the present invention before the operation of the state,
4 to 10 is a view for explaining the operation of the heat welding apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings it will be described with respect to the heat-sealing device for coupling the plastic fuel tank and plastic parts according to an embodiment of the present invention.

Thermal welding device for bonding the plastic fuel tank and plastic parts according to the present invention, as shown in Figures 1 to 3, the gripper 10 for clamping the plastic parts (1); A component heater (20) for heating the fusion surface (1a) of the plastic component (1) clamped to the gripper (10); A tank heater 30 for heating the fusion portion 2a of the plastic fuel tank 2; The gripper 10, the component heater 20, and the tank heater 30 are sequentially positioned from the top to the bottom along a straight line L1 in the vertical direction; In the state in which the fusion portion (2a) of the plastic fuel tank (2) is located below the vertical direction of the tank heater (30) is characterized in that the thermal fusion bonding operation of the plastic component (1) is in progress.

In addition, the present invention includes a gripper cylinder 40 that operates to raise and lower the gripper 10; A component heater cylinder 50 connected to the component heater 20; A tank heater cylinder 60 connected to the tank heater 30; A moving body 70 in which the component heater cylinder 50 and the tank heater cylinder 60 are connected together; A servo cylinder (80) operable to simultaneously move up and down the component heater cylinder (50) and the tank heater cylinder (60) as the movable body (70) moves up and down; A fixed body 90 to which the gripper cylinder 40 and the servo cylinder 80 are fixedly coupled; And a rail mechanism 100 for connecting the fixed body 90 and the moving body 70 to guide the vertical movement of the moving body 70.

The gripper cylinder 40 and the servo cylinder 80 are installed to extend up and down while being fixed to the fixed body 90, and the servo cylinder 80 is located in the rear side of the gripper cylinder 40 and is installed in parallel with each other. .

The gripper cylinder 40 is coupled to the gripper 10 through the cylinder rod 41, and the servo cylinder 80 is coupled to the moving body 70 through the cylinder rod 81.

By the operation of the gripper cylinder 40 and the servo cylinder 80, the cylinder rods 41 and 81 have a structure of moving up and down respectively.

The rail mechanism 100 for guiding the shanghai movement of the moving body 70 during the operation of the servo cylinder 80 includes a guide rail 101, a guide rail 101 fixedly coupled to the fixed body 90, and extended upward and downward. Coupled with the moving body 70 includes a rail block 102 to move up and down along the guide rail (101).

The vertical straight line L1 serves as a reference line penetrating the center of the plastic part 1 clamped to the gripper 10, the center of the part heater 20, and the center of the tank heater 30 in the up and down direction.

Accordingly, the component heater 20 and the tank heater 30 are moved relative to the moving body 70 so that the center of the component heater 20 and the center of the tank heater 30 may be located on a straight line L1 in the vertical direction. To be located forward.

To this end, the component heater cylinder 50 and the tank heater cylinder 60 are positioned to face each other by being spaced from side to side based on a straight line L1 in the vertical direction, and the component heater cylinder 50 and the tank heater cylinder 60 ) Are respectively coupled to the cylinder block (51, 61), the cylinder block (51, 61) is fixedly coupled to the left and right sides of the lower front of the moving body 70, respectively, the component heater cylinder 50 and the tank The cylinder rods 52 and 62 of the heater cylinder 60 are moved in left and right directions, respectively, and the heater blocks 53 and 63 are coupled to the ends of the cylinder rods 52 and 62, respectively, and the heater block 53 is disposed. , 63 is coupled to the component heater 20 and the tank heater 30, respectively.

When the component heater 20 and the tank heater 30 are positioned on a straight line L1 in the vertical direction, the component heater 20 is positioned on the upper portion of the tank heater 30 so as to overlap the component heater 20. The left side of the) is coupled to the heater block 53 is connected to the component heater cylinder 50, the right side of the tank heater 30 is coupled to the heater block 63 is a structure connected to the tank heater cylinder (60).

According to the present invention, the component heater cylinder 50 and the tank heater cylinder 60 are configured to operate at the same time, and the component heater cylinder 20 and the tank heater cylinder 60 are simultaneously operated by the component heater cylinder 50 and the tank heater cylinder 60. The heater 300 is positioned on a straight line L1 in the vertical direction and overlaps with each other, or moves to the left and right with respect to the straight line L1 in the vertical direction.

The heat fusion apparatus according to the present invention has a structure coupled to the robot arm, and moves to the position where the plastic fuel tank 2 is located by the operation of the robot arm to perform the heat fusion operation of the plastic component 1.

The robot arm may be preferably detachably coupled to the fixed body 90.

Hereinafter, the operation of the embodiment of the present invention will be described.

The plastic fuel tank manufactured through the blowing process and then cooled after the manufacturing process is fixed by the fuel tank fixing jig located in the heat welding work part, and the heat welding device in which the plastic part 1 is clamped to the gripper 10 is a robot. The movement of the arm moves to the position where the plastic fuel tank is located.

1 to 3 is an initial state in which the heat fusion device is moved to the upper side of the plastic fuel tank (2) located in the heat welding work portion, the gripper 10 on a straight line (L1) in the vertical direction in the initial state as described above Fusion part 2a of the plastic fuel tank 2 at the bottom of the straight line L1 coincides with the center of the plastic part 1 clamped to the center of the component heater 20 and the center of the tank heater 30. ) Will be located.

4 to 5 show the gripper 10 and the moving body 70 in which the plastic part 1 is clamped as the gripper cylinder 40 and the servo cylinder 80 operate together in the initial state as shown in FIGS. 1 to 3. Is in the primary operating state with the down moves (arrows M1, M2).

As the gripper 10 descends, the fusion surface 1a of the plastic part 1 clamped to the gripper 10 is heated in contact with the component heater 20, and the tank heater 30 is heated in the plastic fuel tank 2. Since the fusion part 2a of the plastic part 1 is heated, the fusion part 1a of the plastic part 1 and the fusion part 2a of the plastic fuel tank 2 are connected to the part heater 20 and the tank heater 30. Are simultaneously heated to melt.

6 to 7 are gripper cylinders after melting of the fusion surface 1a of the plastic part 1 and the fusion portion 2a of the plastic fuel tank 2 in the first operating state as shown in FIGS. 4 to 5. The gripper 10 and the moving body 70 in which the plastic part 1 is clamped together by the operation of the 40 and the servo cylinder 80 are in the secondary operation state. (Arrows M3 and M4)

When the gripper 10 and the moving body 70 move upward, the fusion surface 1a of the plastic part 1 after melting is moved to the upper side of the part heater 20 to be spaced apart and at the same time the tank heater 30 is made of plastic The fuel tank 2 moves upwardly and spaced apart from the welded portion 2a.

In the initial state of FIGS. 1 to 2 and the secondary operating state of FIGS. 6 to 7, the thermal welding apparatus maintains the same state in the drawings. However, the initial state of FIGS. 1 to 2 is a state before the fusion surface 1a of the plastic component 1 and the fusion portion 2a of the plastic fuel tank 2 are heated by a heater, and FIGS. 6 to 7 The secondary operation state is different from that in which the fusion surface 1a of the plastic part 1 and the fusion portion 2a of the plastic fuel tank 2 are heated and melted by a heater.

FIG. 8 shows the parts heater 20 and the tank heater 30 in a straight line L1 by simultaneous operation of the parts heater cylinder 50 and the tank heater cylinder 60 in the second operation state as shown in FIGS. 6 to 7. As the reference moves to the left and right as a reference, the gap between the parts heater 20 and the tank heater 30 is the third operation state (arrow M5, M6).

When switching from the primary operation state as shown in FIGS. 4 to 5 to the secondary operation state as shown in FIGS. 6 to 7, the third operation state as shown in FIG. 8 may proceed simultaneously.

FIG. 9 illustrates a gap between the component heater 20 and the tank heater 30 of the plastic part 1 clamped to the gripper 10 by the operation of the gripper cylinder 40 in the third operation state as shown in FIG. 8. It is the fourth operating state which is lowered through, and the fusion surface 1a of the lowered plastic part 1 is thermally fused and bonded while contacting the fusion portion 2a of the plastic fuel tank 2 (arrow M7).

The servo cylinder 80 does not operate when the fourth operating state is in progress, and after the fourth operating state is completed, the plastic parts 1 are thermally bonded to the fusion portion 2a of the plastic fuel tank 2. Becomes

10 is a fifth operation state in which the gripper 10 is moved upward again by the operation of the gripper cylinder 40 after the completion of the fourth operation state (arrow M8).

In the third operation state of FIG. 8 and the fifth operation state of FIG. 10, the thermal welding apparatus maintains the same state in the drawing. However, the third operating state of FIG. 8 is a state before the plastic part 1 is heat-sealed to the fusion portion 2a of the plastic fuel tank 2, and the fifth operation state of FIG. There is a difference in the state after being thermally fused to the fusion portion 2a of the plastic fuel tank 2.

In addition, after the fifth operating state as shown in FIG. 10, the gripper 10, the component heater 20, and the tank heater 30 are positioned on the straight line L1 in the vertical direction as shown in FIGS. 1 to 2. You are returned and you are ready for the next job.

As described above, the heat welding apparatus according to the present invention includes a center of the plastic part 1 clamped to the gripper 10, a center of the part heater 20, and a center of the tank heater 30 based on the initial state before operation. This configuration is located on the straight line L1 in the vertical direction, whereby the operation of heating the fusion surface 1a of the plastic part 1 only by the vertical movement of the gripper 10 and the fusion surface 1a are heated. Since the plastic parts 1 are moved to the fusion portion 2a of the fuel tank 2, heat fusion bonding becomes possible, and as a result, the work time required for the heat fusion bonding can be shortened or the work cycle can be shortened. By doing so, there is an advantage that can improve the quality performance of the thermal fusion bonding.

Conventional heat fusion apparatus has a structure in which the center of the plastic parts clamped to the gripper, the center of the component heater and the center of the tank heater are located in a straight line in the vertical direction, respectively, based on the initial state before operation.

Therefore, the conventional heat welding apparatus required an operation of rotating the gripper in the vertical direction or the left and right directions to heat the fusion surface of the plastic part, or the operation of moving the gripper from side to side, and the fusion surface was heated. When the plastic parts were moved to the fusion part of the fuel tank, it was necessary to move them from side to side. As such rotation and movement in the left and right directions were added, there was a disadvantage in that the working time required for the thermal fusion coupling was long. There was a disadvantage in that the poor bonding rate increased as the heat fusion bonding progressed after the solidification progressed.

However, in the heat fusion apparatus according to the present invention, as described above, the center of the plastic part 1 clamped to the gripper 10, the center of the part heater 20, and the tank heater 30 of the initial state before operation. The center is located on the straight line L1 in the vertical direction, and the heat grip bonding operation is performed by simply moving the gripper 10 only in the vertical direction without the rotational motion of the gripper 10 or the horizontal movement. Bar through this, it is possible to shorten the working time required for the thermal fusion bonding, further it is possible to improve the quality performance of the thermal fusion bonding.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that the invention can be variously modified and varied without departing from the spirit of the invention provided by the following claims. It will be self-evident for those of ordinary knowledge.

1-plastic part 1a-fusion surface
2-Plastic Fuel Tank 2a-Fusion
10-Gripper 20-Parts Heater
30-Tank Heater 40-Gripper Cylinder
50-Parts Heater Cylinder 60-Tank Heater Cylinder
70-Moving Body 80-Servo Cylinder
90-Fixed Body 100-Rail Mechanism

Claims (6)

Grippers for clamping plastic parts;
A component heater for heating the fusion surface of the plastic component clamped to the gripper;
A tank heater for heating the welded portion of the plastic fuel tank;
The gripper, the component heater, and the tank heater are sequentially positioned from top to bottom along a straight line in the vertical direction;
Thermo-fusion bonding device of the plastic fuel tank and plastic parts, characterized in that the heat fusion bonding operation of the plastic parts in the state in which the fusion portion of the plastic fuel tank is located below the vertical direction of the tank heater. The method according to claim 1,
A gripper cylinder operative to raise and lower the gripper;
A component heater cylinder connected to the component heater;
A tank heater cylinder connected to the tank heater;
A moving body to which the component heater cylinder and the tank heater cylinder are connected together;
And a servo cylinder configured to move the component heater cylinder and the tank heater cylinder up and down at the same time as the movable body moves up and down. The method according to claim 2,
A fixed body to which the gripper cylinder and the servo cylinder are fixedly coupled; And
A rail mechanism for guiding the vertical movement of the movable body while connecting the fixed body and the movable body;
And a gripper cylinder and a servo cylinder are installed in parallel with each other while the servo cylinder is positioned at the rear side of the gripper cylinder. The method according to claim 2,
The component heater cylinder and the tank heater cylinder are fixed to the moving body so as to face each other by being spaced from side to side;
The component heater cylinder and the tank heater cylinder operate simultaneously;
By the simultaneous operation of the component heater cylinder and the tank heater cylinder, the component heater and the tank heater are positioned on a straight line in the vertical direction and overlapped up or down, or the plastic fuel, characterized in that it is located to the left and right with respect to the straight line in the vertical direction. Thermal welding device for joining tanks and plastic parts. The method according to claim 4,
The plastic parts are clamped by the simultaneous operation of the gripper cylinder and the servo cylinder in a state in which the fusion part of the plastic fuel tank and the plastic parts clamped to the tank heater, the part heater and the gripper are sequentially positioned along the vertical straight line. The gripper and the moving body descend together;
The fusion surface and the tank heater of the plastic component clamped to the gripper by the lowering of the gripper and the moving body are in contact with the fusion portion of the component heater and the plastic fuel tank, respectively, and simultaneously heat the fusion surface of the plastic component and the fusion portion of the plastic fuel tank. Thermo-fusion apparatus for joining the plastic fuel tank and plastic parts, characterized in that for melting. The method according to claim 5,
After melting of the fusion surface of the plastic part and the fusion part of the plastic fuel tank is finished, the plastic part moves to the upper side of the component heater and is spaced apart by the operation of the gripper cylinder and the servo cylinder, and the tank heater is separated from the fusion part of the plastic fuel tank. Move away;
As the component heater and the tank heater move left and right by the simultaneous operation of the component heater cylinder and the tank heater cylinder, an interval between the component heater and the tank heater is widened;
The plastic part clamped to the gripper is lowered through the gap between the part heater and the tank heater by the operation of the gripper cylinder, and the fusion surface of the lowered plastic part is in thermal contact with the fusion part of the plastic fuel tank. Heat welding device for joining plastic fuel tank and plastic parts, characterized in that.

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