JP2004017544A - Automatic molding apparatus for urethane skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic molding apparatus for molding a urethane skin by spraying a urethane material on a skin mold. <P>SOLUTION: The automatic molding apparatus for the urethane skin comprisies a yard 10 for spraying a release agent to skin molds 24, the yard 12 provided on the downstream side of a peripheral direction adjacent to the yard 10 to spray urethane on the molds, the yard 14 provided on the downstream side of a peripheral direction adjacent to the yard 12 and curing the urethane on the molds, the yard 16 on the downstream side of a peripheral direction adjacent to the yard 14 to demold the urethane skin from the molds, a plurality of independent self-propelled trucks 18 mounted on a circular rail 30 arranged along a series of the yards and individually loaded with molds, a first manupulator 20 arranged on the release agent spray yard and a second manupulator 22 arranged to the urethane spraying yard. The respective independent self-propelled trucks are allowed to independently arrive at either one of the yards and required work is performed in each of the corresponding yards to produce the urethane skin. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic urethane skin forming apparatus, and more specifically, to efficiently automate a process of spraying a liquid urethane material onto a skin forming die to form, for example, a skin of a vehicle instrument panel. It relates to a device that can be achieved.
[0002]
[Prior art]
For example, vehicle interior members such as an instrument panel and a floor console are provided in a passenger compartment of a passenger car or the like. This kind of vehicle interior member generally has a three-layer structure of a skin material, a foam material and a base material, and the skin material used for this is preformed according to the contour shape of an instrument panel or the like. . As the skin preforming technique, powder slush molding or vacuum forming has been conventionally used, but as a complement to the disadvantages inherent in these forming methods, urethane is spray-sprayed on a skin forming mold. A method of producing a urethane skin formed into a required shape by forming a film having a required thickness and peeling the film from a mold after the urethane material is solidified has also been implemented.
[0003]
That is, as shown in FIG. 15, the urethane coating 43 having a required thickness is formed on the molding surface 39a by uniformly spraying a liquid urethane material from the spray nozzle 41 toward the molding surface 39a of the skin molding die 39. The skin mold 39 is provided with a heating pipe 45 through which a heat medium such as hot water or the like flows, and the temperature is raised to a temperature (for example, about 65 ° C.) optimal for curing the urethane material after spraying the molding surface 39 a. It is warm. As the urethane material sprayed from the spray nozzle 41, there are a non-foaming type and a foaming type. Generally, a premix of two kinds of raw material liquids is prepared. The urethane sprayed to the molding surface 39a and having a uniform thickness is cured after a lapse of a required time, and the cured urethane film is released from the skin molding die 39 as described above, thereby obtaining an instrument panel. The epidermis used for etc. is manufactured.
[0004]
[Problems to be solved by the invention]
As a device for producing urethane skin by spraying urethane onto a skin mold, for example, a turntable type mechanism is employed. In this method, a plurality of skin molds are provided for each required center angle on a turntable that can be horizontally rotated in a required circumferential direction, and (1) a release agent is blown outside the orbit of the turntable. An urging station, (2) urethane spraying station, (3) urethane curing station, and (4) urethane skin removal station. Then, by turning the turntable intermittently or continuously at a slow speed, any of the skin molding dies arrives corresponding to each station, and a unique work is performed at the station. By doing so, the urethane skin is gradually formed. However, only a plurality of skin molds are fixedly provided in the turntable type mechanism, and each skin mold is not individually moved. Therefore, there is a disadvantage that the timing at which the turntable rotates to transfer each skin mold to the next station always depends on the station requiring the longest working time. As an example, if the demolding operation at the demolding station is delayed due to unfamiliarity of the operator, the other skin molds cannot be moved to the next station even if the work at the corresponding station has been completed. Difficulties are pointed out.
[0005]
[Object of the invention]
The present invention has been proposed in order to preferably solve the above-mentioned drawbacks inherent in the conventional urethane skin forming process, and sprays a liquid urethane material onto a skin forming mold to form, for example, a vehicle. It is an object of the present invention to provide an automation device capable of efficiently performing a step of forming a skin of an instrument panel for use.
[0006]
[Means for Solving the Problems]
In order to overcome the above problems and achieve the intended purpose, an automatic urethane skin molding apparatus according to the present invention is provided with a release agent spraying yard in which a release agent is sprayed on a skin mold.
A urethane spray yard provided on the downstream side in the circumferential direction adjacent to the release agent spray yard, wherein urethane is sprayed on the skin mold.
A urethane cure yard that is provided on the downstream side in the circumferential direction adjacent to the urethane spray yard and solidifies the urethane sprayed on the skin mold over time,
A demolding yard provided on the downstream side in the circumferential direction adjacent to the urethane cured yard, and for removing urethane skin molded into the skin molding die,
A plurality of independent self-propelled vehicles mounted on endless rails arranged in a circle along the series of yards and individually mounted with the skin forming dies,
A first manipulator disposed in the release agent spray yard and spraying a release agent on the skin mold;
A second manipulator that is disposed in the urethane spray yard and sprays urethane onto the skin mold;
Each of the independent self-propelled carriages independently arrives at any of the series of yards, and a required work is performed in each corresponding yard to manufacture a urethane skin.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an automatic urethane skin forming method according to the present invention and an apparatus for performing the same will be described below with reference to the accompanying drawings. 1 is a schematic plan view of an automatic molding apparatus capable of suitably performing an automatic molding step of urethane skin, FIG. 2 is an enlarged plan view of FIG. 1, and FIG. 3 is a view of FIG. 4, FIG. 4 is an enlarged plan view of an arbitrary self-propelled vehicle shown in FIG. 2, FIG. 5 is a vertical cross-sectional view of the independent self-propelled vehicle observed from the direction of arrows 5-5 in FIG. FIG. 7 is a longitudinal sectional view of the independent self-propelled vehicle observed from the direction of the arrow 6-6 in FIG. 4, FIG. 7 is a front view of the independent self-propelled vehicle observed from the direction of the arrow 7-7 of FIG. 1 is a schematic perspective view showing the entire configuration of an automatic urethane skin forming apparatus according to an embodiment.
[0008]
(Overview of overall configuration)
In FIG. 1, the factory floor on which the trolley support rails 30 are laid in a circle is divided into the following four sections along the trolley support rails 30.
(1) A release agent spraying yard 10 that is surrounded by a chamber partially opened inward in the radial direction and sprays a release agent onto a skin mold 24 mounted on an independent self-propelled carriage 18 described below.
(2) A urethane spray yard 12 provided in the circumferential direction adjacent to the release agent spray yard 10 for spraying liquid urethane on the skin mold 24. The urethane spray yard 12 is also surrounded by a chamber partially opened radially inward.
(3) A urethane cure yard 14 that is provided in the circumferential direction adjacent to the urethane spray yard 12 and cures urethane applied to the skin mold 24. The urethane cure yard 14 is easily partitioned by, for example, a wall enclosure 27 in order to restrict entry of an operator or the like.
(4) A removal yard 16 provided in the circumferential direction adjacent to the urethane cure yard 14 and for taking out the urethane skin formed in the skin mold 24. The removal yard 16 allows a worker to freely enter and engage in removal work.
[0009]
As will be described later, the three independent self-propelled trucks 18 each equipped with the skin molding die 24 are mounted on the vertical fixed shaft 40 erected at the center of the circularly laid truck support rail 30 with the rails 30 as the center. It can run independently on the top. That is, each self-propelled truck 18 intermittently arrives at each yard in the order of the release agent spraying yard 10 → the urethane spraying yard 12 → the urethane cure yard 14 → the demolding yard 16 and stops, and performs required work. And then to the next adjacent yard in the circumferential direction.
[0010]
(About the structure supporting the cart)
As shown in FIGS. 2, 3 and 8, a frame-like lower structure 32 combining steel frames is installed on a factory site where an automatic urethane skin forming apparatus is installed. A plurality of ring support beams 34 (eight in the example) extend horizontally outward in the radial direction. A large-diameter lower ring 28 is fixed to the tip of each of the plurality of ring support beams 34, and the upper end of a vertical column 36 disposed at an inner periphery of the lower ring 28 for each required center angle. The lower ring 28 and the upper ring 26 having the same diameter are fixed concentrically.
[0011]
The upper ring 26 functions to guide the three independent self-propelled vehicles 18 described later traveling in the circumferential direction and to support the horizontal load applied to the independent self-propelled vehicles 18. The lower ring 28, which is located below the upper ring 26 by a required distance, has a flat chain 60 endlessly wound and fixed around its outer periphery. As will be described later in detail, a sprocket 62 of a speed reducer 66 provided on a bogie vertical frame 82 constituting the independent self-propelled bogie 18 is meshed with the chain 60, and a bogie driving motor 64 connected to the speed reducer 66 is operated. By rotating, the independent self-propelled carriage 18 rotates clockwise in FIG. 1 to sequentially arrive and stop at the release agent spray yard 10, the urethane spray yard 12, the urethane cure yard 14, and the demold yard 16. Things.
[0012]
As shown in FIGS. 3 and 8, a frame-shaped upper structure 38 having a central axis aligned with a steel frame is installed above the lower structure 32. A vertical fixed shaft 40 is provided upright. In this embodiment, since three independent self-propelled trolleys 18 are provided, three bearings 42 are arranged on the vertical fixed shaft 40 in the axial direction. The ends of the two bogie support beams 44, 44 shown in FIG. Each of the bogie supporting beams 44 extends horizontally as shown in FIGS. 3, 5 and 6, and the other end of the supporting beams 44 is connected to a bogie vertical frame 82 constituting a vertical plane of the independent self-propelled bogie 18. Fixed. Therefore, each independent self-propelled carriage 18 can independently orbit around the vertical fixed shaft 40 in combination with the carriage support rail 30 and the wheels 46 described later.
[0013]
(About circular rails and independent self-propelled vehicles)
As shown in FIGS. 2 and 8, a bogie support rail 30 having a circular shape and a large diameter is laid around the center of the lower structure 32 (that is, the center axis of the vertical fixed shaft 40), as shown in FIGS. ing. The bogie support rail 30 is concentric with the upper ring 26, but the diameter thereof is set to be larger than the diameter of the upper ring 26. As shown in FIGS. 3 and 5 to 7, a vertical bracket 48 is provided on a bottom surface of the bogie horizontal frame 80 constituting the independent self-propelled bogie 18 and at a position adjacent to the bogie vertical frame 82 via a vertical bracket 48. Wheels 46 are rotatably supported. The location of the wheels 46 is such that when the bogie support beam 44 of the independent self-propelled bogie 18 is rotatably mounted on the vertical fixed shaft 40, the wheels 46 contact the bogie support rail 30 from above, The independent self-propelled carriage 18 is set at a position capable of supporting the vertical load. Preferably, three wheels 46 are provided at required intervals along the curve of the bogie support rail 30, as indicated by the broken line in FIG. That is, since the vertical load of the independent self-propelled bogie 18 is supported by the plurality of wheels 46 on the rear side of the bogie horizontal frame 80, for example, the second manipulator 22 in the urethane spraying yard 12 on the back front side of the bogie horizontal frame 80. The wheels 46 do not exist on the disposition side or on the part of the removal yard 16 that is close to the work area of the worker, so that a free space is ensured.
[0014]
Although the wheels 46 support the vertical load from the independent self-propelled trolley 18 on the trolley support rails 30, the wheels 46 are only mounted on the trolley support rails 30. When a load in the radial direction is applied to the carriage 18 for some reason, there is a fear that the carriage 18 may be disengaged from the carriage support rail 30. Therefore, as shown in FIGS. 4 and 6, a horizontal bracket 54 is disposed below the bogie vertical frame 82, and extends horizontally above the bogie support rail 30. Rollers 50 and 52 having a vertical rotation axis are supported on the horizontal bracket 54 at opposing intervals at required intervals, and the bogie support rail 30 is slidably held between the rollers 50 and 52. I have.
[0015]
(About the guide mechanism by the upper ring)
As shown in FIGS. 3, 4 and 6, the bogie support beam 44 has one end pivotally supported by the vertical fixed shaft 40 via the bearing 42 and the other end of the bogie of the independent self-propelled bogie 18. By connecting to the vertical frame 82, it can go around the upper ring 26. Two L-shaped brackets 58, 58 are disposed on the bogie support beam 44 immediately above the upper ring 26, and each L-shaped bracket 58 has a hanging end such as a rubber tire at its lower end. 56 is pivotably supported horizontally. The ring holding rings 56, 56 pivotally supported by these two L-shaped brackets 58, 58 tightly hold the vertical portion of the H-shaped steel constituting the upper ring 26 from both sides. The upper ring 26 supports a radially outward load applied to the connected independent self-propelled vehicle 18 and guides the independent self-propelled vehicle 18 in a smooth circumferential direction.
[0016]
(About the drive source of the self-propelled carriage)
As shown in FIGS. 5 and 6, a flat chain 60 is endlessly wound and fixed around the outer periphery of the lower ring 28, and the sprocket 62 of the speed reducer 66 is meshed with the chain 60 to form the independent chain. The self-propelled trolley 18 can be self-propelled. That is, as shown in FIGS. 4 and 5, the sprocket fixed to the output shaft is attached to the independent self-propelled truck 18 on the rear side of the bogie vertical frame 82 with the output shaft directed vertically downward. 62 meshes with the chain 60 wound around the lower ring 28. A bogie driving motor 64 is connected to the upper part of the speed reducer 66, and power is supplied to the bogie driving motor 64 via, for example, the slip ring 15 (see FIG. 3) provided above the vertical fixed shaft 40. It is. Accordingly, the rotation of the bogie drive motor 64 is reduced by the speed reducer 66 and transmitted to the sprocket 62, and the sprocket 62 meshes with the chain 60 to rotate the independent self-propelled bogie 18 around the vertical fixed shaft 40. Self-propelled. At this time, the load applied to the independent self-propelled vehicle 18 in the vertical direction is supported by the bogie support rail 30 via the wheels 46 and acts radially outward of the independent self-propelled vehicle 18 as described above. This horizontal load is supported by the vertical fixed shaft 40 via the bogie support beam 44 and the bearing 42. Instead of the chain 60 wound around the lower ring 28, a segment in which teeth are formed on the outer arc surface of an arc-shaped member having a required curvature is sequentially arranged on the outer periphery of the lower ring 28. It may be a rack.
[0017]
(About trolley lock mechanism)
As shown in FIGS. 2 to 5, when each of the independent self-propelled vehicles 18 arrives at predetermined positions of the release agent spraying yard 10, the urethane spraying yard 12, and the demolding yard 16, the independent self-propelled vehicles 18 are stopped. A lock mechanism for releasably fixing the yard to the corresponding yard is provided in each corresponding yard. For example, a fixing cylinder 84 is horizontally fixed to the column 36 located at the opening side of the urethane spraying yard 12 (a portion which is largely opened in the partition wall of the yard when the independent self-propelled vehicle leaves as described later). The tip of the piston rod 17 is directed toward the opening of the urethane spray yard 12 so as to be able to move forward and backward. The independent self-propelled carriage 18 has a C-shaped structure in a plane (described later), and a positioning piece 86 protrudes from the center of the carriage vertical frame 82 and to the vertex of the “C”. ing. When the tip of the piston rod 17 of the fixing cylinder 84 abuts on the positioning piece 86, the independent self-propelled carriage 18 is fixed. The tip of the piston rod 17 is provided with a tapered round, and the positioning piece 86 is provided with a reversely tapered recess correspondingly.
[0018]
That is, while the independent self-propelled truck 18 is circling along the upper ring 26 and the truck support rail 30, the fixing cylinder 84 is in a deactivated state, and the piston rod 17 is retracted into the cylinder body. ing. However, when the independent self-propelled truck 18 enters the urethane spraying yard 12, for example, a sensor such as a limit switch (not shown) detects the arrival at the home position, and a control panel (not shown) is used to drive the truck. A stop command is given to the motor 64 and an urging command is issued to the fixing cylinder 84. As a result, the fixing cylinder 84 is urged to extend the piston rod 17 and abut the positioning piece 86 of the independent self-propelled carriage 18 stopped at a fixed position. As described above, the tip of the piston rod 17 has a tapered round shape, and the positioning piece 86 is provided with an inverted tapered recess. When the independent self-propelled carriage 18 has a slight displacement, the displacement can be corrected and locked in a fixed position by entering while abutting against the vehicle. Therefore, during the urethane spraying operation on the skin mold 24, the independent self-propelled carriage 18 is kept in a stable state. In the urethane cure yard 14, it is not necessary to stably fix the independent self-propelled trolley 18, but rather, it is more necessary to increase the cure time while running the independent self-propelled trolley 18 slowly. The urethane cure yard 14 is not provided with the lock mechanism.
[0019]
(About release agent spray yard and urethane spray yard)
The release agent spraying yard 10 is a chamber for spraying the release agent in a spray form on the mold surface of the skin forming die 24 mounted on the independent self-propelled carriage 18, and the release agent is sprayed. This is performed by the nozzle 19 of the first manipulator 20 disposed in the yard 10. The urethane spraying yard 12 is a chamber for spraying urethane on the mold surface of the skin forming die 24 to apply the urethane to a controlled thickness, and the urethane spraying is performed in the yard 12. This is performed by the nozzle 19 of the second manipulator 22 provided. That is, the release agent spraying yard 10 and the urethane spraying yard 12 can define a substantially closed indoor space in the yard when the independent self-propelled truck 18 arrives at and stops at the corresponding position of each corresponding yard. It has become. The reason is that in the release agent spraying yard 10 and the urethane spraying yard 12, a release agent or urethane is sprayed on the skin mold 24, so that it is partitioned by an image wall to protect a working environment and forced ventilation is performed. It is necessary to do it. Further, when urethane is sprayed in the urethane spray yard 12, it is necessary to perform air conditioning to control the curing time of the urethane and to control the temperature of the environmental atmosphere.
[0020]
Thus, the release agent spray yard 10 is surrounded by a plurality of vertical partition walls 21 and, as shown in FIGS. A booth for spraying the release agent is defined inside. As shown in FIG. 14, when the independent self-propelled carriage 18 leaves the release agent spray yard 10, the open area not surrounded by the vertical partition 21 behind the release agent spray yard 10, that is, a large area An opening 23 is provided. When the independent self-propelled carriage 18 that has been waiting in the removal yard 16 on the upstream side arrives at the release agent spraying yard 10, a part of the carriage vertical frame 82 of the independent self-propelled carriage 18 is formed. The yard 10 can be closed by the vertical wall that forms a closed state. In this yard structure, the urethane spray yard 12 located adjacent to the downstream side of the release agent spray yard 10 is exactly the same, and the urethane spray yard 12 also has an opening 23.
[0021]
(About urethane cure yard and removal yard)
The urethane cure yard 14 is a yard for securing the time required for solidifying urethane spray-blown from the nozzle 19 of the second manipulator 22 to the skin mold 24 in the urethane spray yard 12 in the previous process. Therefore, the independent self-propelled carriage 18 equipped with the skin forming die 24 can move the yard 14 to the demolding yard 16 on the downstream side at a very low speed even if the solidification time elapses while stopped at the yard 14. The required solidification time may elapse while traveling. In the urethane cure yard 14, there is no danger that the mist of the above-described release agent or the like is scattered, and there is no request for air conditioning. Therefore, the yard 14 does not need to be a booth-shaped closed space. However, a simple wall enclosure 27 may be provided as shown in FIG. 1 and FIG.
[0022]
The removal yard 16 is a work area for removing a urethane product (for example, an instrument panel for a vehicle) formed on the surface of a skin forming die 24 mounted on the independent self-propelled carriage 18. As will be described later, the bogie horizontal frame 80 constituting the independent self-propelled bogie 18 is formed in a planar C-shape, and the wheels 46 supporting the vertical load of the independent self-propelled bogie 18 are provided in the detachable yard 16. Since it is located at a position sufficiently deeper than the work area of the worker, the foothold area of the worker is sufficiently ensured, and the efficiency of the demolding work is improved.
[0023]
(About independent self-propelled trolley)
Although the schematic structure of the independent self-propelled carriage 18 has already been described, further details will be described. As described above, the independent self-propelled trolley 18 basically includes a trolley horizontal frame 80 having wheels 46 and a trolley vertical frame 82 which rises vertically from the rear side of the trolley horizontal frame 80. The skin mold 24 is mounted. As shown in the plan view of FIG. 4, the bogie horizontal frame 80 is provided on the side of the release agent spraying yard 10 where the first manipulator 20 is disposed, that is, on the side of the release agent spraying work area, or in the release yard. 16 is formed in a C-shape. As a result, the bogie horizontal frame 80 retreats as the center side of the various work areas moves toward the vertical fixed shaft 40 which is the center of rotation of the independent self-propelled bogie 18, thereby securing a wider work area.
[0024]
Therefore, the "horizontal" carriage horizontal frame 80 of the independent self-propelled carriage 18 is referred to as a first wing 29 (right side) and a second wing 31 (left side) for convenience. Each of the second wings 31 is provided with one skin mold 24. As described above, the independent self-propelled carriage 18 is formed in a “C” shape by the first wing 29 on the right side and the second wing 31 on the left side, and the skin forming dies 24 are mounted on each wing. When the manipulator 20 (22) is operated in various degrees of freedom by computer control, the nozzles 19 are located very close to the corresponding skin molds 24. That is, when the nozzle 19 sprays a release agent or urethane, the moving distance of the nozzle 19 can be minimized to improve efficiency.
[0025]
In addition, as shown in FIG. 12, the upper surface of the skin forming die 24 is an undulating surface 33 for forming, for example, an instrument panel. The skin mold 24 is not fixedly mounted on the first wing 29 and the second wing 31, but is mounted so as to be able to move up and down by a required vertical distance. When the release agent is sprayed in the release agent spraying yard 10 and urethane is sprayed in the urethane spraying yard 12, each of the nozzles 19 of the first manipulator 20 and the second manipulator 22 and the skin mold 24 are formed. In order to accurately adjust the relative position, height control is performed by elevating the skin mold 24. The lifting mechanism of the skin mold 24 will be described later with reference to FIGS.
[0026]
The bogie vertical frame 82 of the independent self-propelled bogie 18 is composed of three continuous vertical wall surfaces as shown by reference numerals 82a, 82b, and 82c in FIG. 4, and has a U-shaped wall surface as a whole. That is, the independent self-propelled truck 18 includes a rear side wall surface 82c, a left wall surface 82a, and a right wall surface 82b. As shown in FIG. When the spray yard 12 reaches the spray yard 12 and stops at a fixed position, the corresponding vertical wall surfaces 82a to 82c completely close the opening 23 of each yard, thus defining a substantially enclosed space in the yard. Can be done.
[0027]
(About the mist suction mechanism)
In the release agent spray yard 10, the first manipulator 20 sprays the release agent onto the skin mold 24, and in the urethane spray yard 12, the second manipulator 22 sprays urethane. In order to prevent the mist generated by the spraying operation from dispersing in the factory, flexible ducts 70 are provided in both yards 10 and 12 so as to be able to move up and down, and a mist suction box 68 and a filter 78 are provided. When the independent self-propelled truck 18 reaches the release agent spraying yard 10 and the urethane spraying yard 12, the flexible duct 70 descends and docks with the mist suction box 68, and the mist in the yard is forcibly forced by reduced-pressure air. Is to be collected.
[0028]
For example, as shown in FIG. 4 and FIG. The filter 78 is disposed vertically, and the release agent or urethane mist sprayed and scattered on the skin mold 24 collides with the filter 78. Further, a mist suction box 68 is provided on the independent self-propelled carriage 18 behind the filter 78, and an opening (not shown) of the mist suction box 68 is opened so as to communicate with a rear surface of the filter 78. ing. A vertically rising cylinder 72 is provided on the upper surface of the mist suction box 68, and this cylinder 72 communicates with the inside of the mist suction box 68.
[0029]
As shown in FIGS. 7, 9 and 10, a lifting support 76 connected to a lifting mechanism (not shown) is horizontally disposed inside the release agent spraying yard 10 and the urethane spraying yard 12, Two cylindrical adherends 74, 74 provided near both ends of the elevating support 76 have their openings directed downward. Each tubular adherend 74 is connected to a flexible duct 70, which is connected to a vacuum suction source (not shown). When the independent self-propelled truck 18 arrives at or stops at the fixed position of the release agent spraying yard 10 or the urethane spraying yard 12, the elevating and lowering support members 76 which are always waiting at the ascending position are lowered, and the respective cylindrical members are moved. An adherend 74 is attached to the cylinder 72 erected on the mist suction box 68. At this time, the flexible duct 70 is connected to the vacuum suction source, so that the mist in the yard is collected when passing through the filter 78.
[0030]
(About the positioning mechanism of the mold)
On the floor surface of the release agent spraying yard 10, the urethane spraying yard 12, and the demolding yard 16, and where the independent self-propelled vehicle 18 stops at a fixed position, the skin forming mold 24 is moved with respect to the independent self-propelled vehicle 18. A mechanism is provided for positioning the skin mold 24 with respect to the nozzle 19 of the manipulator 20 (22) by raising or lowering it by a controlled distance. For example, as shown in FIG. 14, pits 88, 88 are recessed on the stop floor of the independent self-propelled carriage 18 in the urethane spray yard 12 and directly below the first wing 29 and the second wing 31. ing. As shown in FIGS. 12 and 13, the support frame 35 is horizontally disposed in the pit 88, and a horizontal support plate 92 is disposed on the upper surface of the support frame 35. As shown in FIGS. 11 to 13, the horizontal support plate 92 is provided with a pair of bushes 98, 98 at required intervals, and a guide bar 96 is inserted into each bush 98 so as to be able to move up and down in the vertical direction. . As shown in FIG. 11, three vertical cylinders 94 are arranged on the horizontal support plate 92, and the piston rods 37 are directed vertically upward.
[0031]
As shown in FIG. 11, an elevating plate 90 arranged in the pit 88 is fixed to the top of the two guide rods 96, and is guided by the guide rod 96 a required distance from the horizontal support plate 92. Up and down. The piston rods 37 of the three vertical cylinders 94 are inserted and fixed to the back surface of the elevating plate 90, and the open ends 13 of the rods 37 slightly protrude from the upper surface of the elevating plate 90. Further, on the back surface of the skin molding die 24, three receiving portions 11 are provided corresponding to the arrangement pattern of the three vertical cylinders 94. Each of the receiving portions 11 opens the piston rod 37 in the vertical cylinder 94. The end 13 can be fitted. Therefore, when the vertical cylinder 94 is urged synchronously, the piston rod 37, which has always been retracted and at the lowered position, advances upward, whereby the elevating plate 90 is also raised to open the piston rod 37. The end 13 is brought into contact with each corresponding receiving portion 11, and the skin mold 24 can be raised by a required distance. When the vertical cylinder 94 is deenergized, the piston rod 37 retreats downward, and the skin molding die 24 descends again and is stably mounted on the independent self-propelled carriage 18.
[0032]
According to the apparatus for automatically forming a urethane skin according to the embodiment configured as described above, any of the independent self-propelled trolleys 18 can independently and independently run, and for some reason, one independent self-propelled trolley 18 is used for work. Even if it is troublesome, the other two independent self-propelled trolleys 18 can individually move to the nearest yard, and the work given to the yard can be advanced first. For example, in the demolding yard 16, it takes time to strip the urethane skin from the skin mold 24, or when it takes time to cure urethane in the urethane cure yard 14 due to a decrease in room temperature as in winter. Even so, a high degree of freedom is given to work in other yards, which contributes to higher work efficiency as a whole.
[0033]
【The invention's effect】
As described above, according to the urethane skin automatic forming apparatus according to the present invention, the process of spraying a liquid urethane material onto a skin forming die, for example, forming a skin of a vehicle instrument panel can be efficiently performed. It can be implemented in practice.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an automatic molding apparatus according to an embodiment for performing an automatic molding step of urethane skin.
FIG. 2 is an enlarged plan view of a main part of FIG.
FIG. 3 is a longitudinal sectional view of FIG. 2 viewed from the direction of arrows 3-3.
FIG. 4 is an enlarged plan view of the independent self-propelled carriage.
FIG. 5 is a longitudinal sectional view of the independent self-propelled carriage observed from the direction of the arrow 5-5 in FIG. 4;
FIG. 6 is a longitudinal sectional view of the independent self-propelled carriage observed from the direction of the arrow 6-6 in FIG. 4;
FIG. 7 is a front view of the independent self-propelled carriage viewed from the direction of the arrow 7-7 in FIG. 4;
FIG. 8 is a schematic perspective view showing an entire configuration of an automatic urethane skin forming apparatus according to an embodiment.
FIG. 9 is a front view of the independent self-propelled carriage, showing a state where the elevating supporter and the tubular adherend stand by at the ascending position relative to the mist suction box.
FIG. 10 is a front view of the self-propelled carriage, showing a state in which the elevating supporter and the tubular adherend are lowered and connected to the mist suction box.
FIG. 11 is a schematic explanatory view showing a state where a positioning mechanism of a molding die exists below a skin molding die mounted on the carriage when the independent self-propelled carriage stops at a fixed position.
FIG. 12 is a partial longitudinal sectional view of a positioning mechanism of the molding die, and shows a state before positioning with respect to the skin molding die.
FIG. 13 is a partial vertical sectional view of a positioning mechanism of the molding die, and shows a state where the positioning is performed on the skin molding die.
FIG. 14 is a schematic plan view of the automatic urethane skin forming apparatus according to the embodiment, showing a state in which the independent self-propelled carriage has left the release agent spray yard and the urethane spray yard.
FIG. 15 is a schematic explanatory view showing a conventional method of forming a skin by spraying urethane.
[Explanation of symbols]
10 Release agent spray yard 11 Receiving part
12 Urethane spray yard 13 Open end (of piston rod)
14 Urethane cure yard 15 Slip ring
16 Removal yard 17 Piston rod
18 Independent self-propelled trolley 19 Nozzle
20 First manipulator 21 Vertical partition
22 second manipulator 23 opening
24 Skin mold 25 Ceiling
26 Upper ring 27 Wall enclosure
28 Lower ring 29 First wing
30 trolley support rail (endless rail) 31 second wing
32 Lower structure 33 Undulating surface
34 Ring support beam 35 Support frame
36 Vertical column 37 Piston rod
38 Upper structure 40 Vertical fixed axis
42 bearing 44 bogie support beam
46 wheels 48 vertical bracket
50 rollers 52 rollers
54 Horizontal bracket 56 Ring holding ring
58 L-shaped bracket 60 Chain (engagement band)
62 Sprocket (engagement wheel) 64 Bogie drive motor
66 reducer 68 mist suction box
70 Flexible duct 72 Cylindrical body
74 tubular adherend 76 elevating support
78 filter 80 bogie horizontal frame
82 Bogie vertical frame 84 Fixing cylinder
86 Positioning piece 88 Pit
90 elevating plate 92 horizontal support plate
94 Vertical cylinder 96 Guide rod
98 Bush

Claims (11)

A release agent spray yard (10) for spraying the release agent onto the skin mold (24);
A urethane spray yard (12) that is provided on the downstream side in the circumferential direction adjacent to the release agent spray yard (10) and sprays urethane on the skin mold (24);
A urethane cure yard (14) which is provided on the downstream side in the circumferential direction adjacent to the urethane spray yard (12) and solidifies the urethane sprayed on the skin mold (24) with time;
A mold release yard (16) provided on the downstream side in the circumferential direction adjacent to the urethane cure yard (14) and for removing urethane skin formed on the skin mold (24);
A plurality of independent self-propelled vehicles mounted on endless rails (30) arranged circularly along the series of yards (10, 12, 14, 16) and individually mounted with the skin molds (24). (18)
A first manipulator (20) disposed in the release agent spray yard (10) and spraying a release agent on the skin mold (24);
A second manipulator (22) disposed in the urethane spray yard (12) and spraying urethane on the skin mold (24);
Each of the independent self-propelled trolleys (18) is allowed to independently arrive at any of the series of yards (10, 12, 14, 16), and required at each corresponding yard (10, 12, 14, 16). An automatic molding apparatus for urethane skin, characterized in that urethane skin is manufactured by performing the above operations. The release agent spray yard (10) is defined as a chamber having an opening (23) radially inward, and the independent self-propelled vehicle (18) arrives at the release agent spray yard (10) and stops. The urethane skin automatic forming apparatus according to claim 1, wherein the opening (23) is closed by vertical wall surfaces (82a to 82c). The urethane spray yard (12) is defined as a chamber having an opening (23) inside in the radial direction, and the vertical wall ( The urethane skin automatic forming apparatus according to claim 1, wherein the opening (23) is closed by (82a to 82c) to form a closed chamber. The independent self-propelled trolley (18) includes a trolley horizontal frame (80) on which the skin forming die (24) is mounted, and a trolley vertical frame (82) erected on the rear side of the trolley horizontal frame (80). 4. The automatic urethane skin forming apparatus according to claim 2, wherein the bogie vertical frame (82) is constituted by the vertical wall surfaces (82 a to 82 c). 5. The bogie horizontal frame (80) has a first wing (29) having an inner edge gradually deviating from the right side of the working area in each yard toward the central part, and a first wing (29) similarly from the left side of the working area in each yard toward the central part. A second wing (31) having an inner edge which is gradually deviated, and the working area is enlarged by the inner edge of the first wing (29) and the inner edge of the second wing (31). Automatic molding equipment for urethane skin. The urethane skin automatic forming apparatus according to claim 5, wherein the skin forming die (24) is mounted on each of the first wing (29) and the second wing (31). A plurality of wheels (46) are rotatably supported on the bottom surface of the trolley horizontal frame (80) and at a position adjacent to the trolley vertical frame (82). The urethane skin automatic forming apparatus according to claim 4, wherein the vertical load on the bogie horizontal frame (80) is supported by the endless rail (30) by being mounted on the carriage (30). A vertical fixed shaft (40) is erected at the center of the circular endless rail (30), and a bearing (42) mounted on the vertical fixed shaft (40) and the independent self-propelled vehicle (18) are supported by a bogie support beam. The automatic molding of the urethane skin according to claim 1, wherein by connecting at (44), the horizontal outward radial load acting on the independent self-propelled carriage (18) is supported by the vertical fixed shaft (40). apparatus. A rotary drive source (64, 66) disposed on a bogie vertical frame (82) constituting the independent self-propelled bogie (18), and an engagement wheel connected to the rotary drive source (64, 66) and rotated. (62), a ring (28) supported by a central structure (32) provided inside the circular endless rail (30), and the engagement ring fixed to the outer periphery of the ring (28). (62) comprises an engagement band (60) engaged so as to transmit power, and by driving the rotary drive source (64, 66), the engagement wheel (62) is brought into engagement with the engagement band (60). The independent self-propelled trolley (18) rotates while being engaged, so that the independent self-propelled trolley (18) is self-propelled in the circumferential direction on the endless rail (30) independently of the other independent self-propelled trolleys (18). Item 2. An automatic urethane skin forming apparatus according to Item 1. A filter (78) and a mist suction box (68) are provided behind the mounting area of the skin mold (24) in the independent self-propelled carriage (18), and the release agent spray yard (10) and urethane A flexible duct (70) connected to an external vacuum suction source is disposed in the spray yard (12) so as to be able to move up and down freely.
At the timing when the independent self-propelled carriage (18) arrives at each of the yards (10, 12) and stops, the flexible duct (70) descends and communicates and connects with the mist suction box (68). The urethane skin automatic forming apparatus according to claim 1, wherein the mist in the (10, 12) is sucked and collected on the filter (78). An elevating plate (90) is provided at a stop position of the independent self-propelled carriage (18) in the release agent spraying yard (10) and the urethane spraying yard (12) so as to be able to move up and down, and the skin forming mold (24). Is mounted on the independent self-propelled carriage (18) so as to be able to move up and down
The lift plate (90) is raised at the timing when each of the independent self-propelled vehicles (18) stops at the corresponding yard (10, 12), and the lift plate (90) is moved to the position of the independent self-propelled vehicle (18). The urethane skin according to claim 1, wherein the skin forming die (24) is raised by a required distance from the independent self-propelled carriage (18) by being brought into contact with the back surface of the skin forming die (24) from the back side. Automatic molding equipment.

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