JPH06226840A - Resin plate molding apparatus - Google Patents

Abstract

(57) [Summary] [Purpose] Mold high-quality molded products with few scratches. [Structure] Molds 12 and 24 for sandwiching the resin plate 1 heated in advance to 160 to 170 ° C by a claw portion 70 of a gripper 69 that can be opened and closed to form a predetermined shape are provided.
When the plates 4 and 4 hold the resin plate 1 during molding, the claw portion 70 opens to separate the resin plate 1 and the resin plate 1 slides on the sliding surface 3 to slide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin plate molding apparatus for processing a heated resin plate to obtain a molded product.

[0002]

2. Description of the Related Art A means has been proposed in which an end of a resin plate, which has been heated to a predetermined temperature in advance, is held by a mold and molded.

[0003]

However, in the above-mentioned means, when the resin plate is molded while being held, the resin plate may slip poorly and the molded product may be damaged.

[0004]

SUMMARY OF THE INVENTION The present invention provides a resin plate molding apparatus capable of improving the quality of a molded product,
The following technical measures were taken. That is, the mold 12 for sandwiching and molding the heated resin plate 1 held by the holding tool 69,
24 is provided, and a plate 4 having a sliding surface 3 on the sandwiching side surface of the mold 12 and / or the mold 24 is provided, and when the plate 4 sandwiches the resin plate 1, immediately before sandwiching, or immediately after sandwiching, The resin plate molding apparatus is characterized in that the gripping of the gripping tool 69 is released.

[0005]

The resin plate 1 heated in advance by the heating means and gripped by the gripper 69 is supplied between the mold 12 and the mold 24 for molding. Next, the two molds 12 and 24 approach each other and hold the end portion of the resin plate 1, and then the molding operation starts. When the resin plate 1 is held, or immediately before or after holding, the holding tool 69 is held. Release the grip. The end of the resin plate 1 slides on the sliding surface 3 of the plate 4 during molding.

[0006]

[Effect] Since the end portion of the resin plate 1 slides during molding, damage by the mold is reduced and the quality of the molded product can be improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, the structure thereof will be described. The molding press device 2 includes a rectangular fixing plate 5 having a wide surface positioned in the lateral direction and facing each other at a predetermined interval, and each corner portion of the both fixing plates 5. A main body 7 integrally formed with the shaft 6 inserted through the main body 7 and a support base 8 and the like provided integrally with the main body 7 to support the main body 7 are provided. When the molding press device 2 is viewed from the front, rails 9 are formed by bending the upper and lower ends of the flat plate laterally at the upper ends of the left and right end faces of the fixing plate 5 to connect the two fixing plates 5. There is.

The movable plate 10 is a rectangular flat plate whose wide surface is located in the lateral direction, and each corner is provided on each shaft 6 so as to be movable in the axial direction. A rectangular outer plate 11 is detachably attached to the inner wall of the movable plate 10. The mold 12 is a mold having a surface 13 for pressing a resin plate (a thermoplastic transparent resin plate, which is made of polycarbonate in the embodiment) which is a base plate, and has a rectangular shape in a front view. A convex portion 15 having an appropriate thickness is provided at the center of the plate 14. The wall of the mold 12 and the wall of the outer plate 11 on the side opposite to the convex portion 15 are integrally provided via a turnbuckle 16. Further, in the space between the outer plate 11 and the plate 14, an air cylinder 17 whose negative end is attached to the outer plate 11 and the other end is attached to the plate 14 is provided. The air cylinder 17 is provided at a substantially symmetrical position in the vertical direction with the turnbuckle 16 interposed therebetween. Reference numeral 18 denotes a piston provided on the air cylinder 17 slidably in the axial direction,
A rectangular retainer plate 20 having a hole 19 through which the protrusion 15 of the mold 12 can be inserted and removed is detachably attached in the central portion. Further, the air cylinder 17 is configured such that air pipes 21 and 22 capable of supplying and exhausting air are connected to both ends of the piston 18 in the moving direction so as to communicate with each other. And the presser plate 2
In the inner wall of the fixed plate 5 facing 0, a rectangular hole 2 is formed in the center.
3, and a mold 24 having a rectangular shape in a front view is detachably attached. The mold 24 may be a metal mold or a wooden mold, and the hole 22 and the hole 19 are provided to have substantially the same size and are provided to be larger than the mold 12 by approximately twice the thickness of the resin plate 1. ing. The width h of the convex portion 15 in the horizontal direction is smaller than the width (depth) H of the hole 22 of the mold 24.

The plate 4 is made of a material whose deformation temperature due to heat is substantially the same as or higher than that of the resin plate 1 (for example, polyacetal, nylon, phenol or the like is preferable) and has a sliding surface 3. The surface of the pressing plate 20 facing the mold 24 and the surface of the mold 24 facing the pressing plate 20 are detachably attached with screws. The plate 4 is provided with holes 25 having substantially the same size as the holes 19 and 23, and the corners of the holes 25 are provided in an arc shape. Further, the plate 4 and the pressing plate 20, the mold 24 and the plate 4
Each of them is provided with a recess 26 having a rectangular shape in a front view. 27
Is a molded product, and 28 is a cylinder (pneumatic pressure, hydraulic pressure, etc.) detachably provided in the central portion of the outer wall of the fixed plate 5,
A piston 29 is provided, which is inserted through the fixed plate 5 and whose tip is detachably attached to the rear wall of the movable plate 10. The preheating device 30 is a box-shaped furnace 31 having an open upper surface, and a heater 32 for maintaining the temperature in the furnace at about 100 to 120 ° C.
Etc., and is located on the lateral side of the molding press device 2. The furnace 31 can accommodate a plurality of resin plates 1 (about 20 to 30 in the embodiment) and the height of the resin plates 1
It is larger than the height of. In addition, the preheating device 3
The front of 0 is provided at the product take-out place 33 by the operator.

The heating device 34 is a box-shaped furnace 3 having an open upper surface.
5, the resin plate 1 housed in this furnace 35 is about 160-180
Heater 36 that heats up to ° C (preferably about 165 ° C)
And the like, and sandwiching the molding press device 2 and preheating device 3
It is provided on the side opposite to 0. The furnace 35 is large enough to accommodate the resin plate 1 heated by the preheating device 30. Reference numeral 37 denotes a bearing plate which is attached to the upper ends of the lateral side end faces of the fixed plates 5 and 5 and faces each other.
7, a rotary shaft 38 having a trapezoidal screw formed on its surface is rotatably provided via a bearing. A moving body 39 having a groove that meshes with a trapezoidal screw is provided at an intermediate portion of the rotating shaft 38 in the axial direction, and a guide frame bracket 40 having an upper portion bent laterally is attached to the moving body 39. The lower end of the guide frame bracket 40 is detachably attached to a slide body 41 slidable on the rail 9. A slide body 41 is also provided on the other rail 9, and a guide frame bracket 40 whose upper portion is laterally bent is detachably attached to the slide body 41.
The rotating shaft 38 is configured to be capable of transmitting with a motor shaft 44 of a forward / reverse rotation motor 43 via a coupling 42.

The transport frame 45 has one end located above the middle part of the furnace 31 and the other end located above the middle part of the furnace 35 and is detachably attached to the upper surface of the guide frame bracket 40. A rodless cylinder frame 46, columns 47 located at both ends of the rodless cylinder frame 46, and lateral frames 48, 49 connecting the columns 47 to the upper end and the middle of the column 47. It is configured by frame and. Then, the rodless cylinder frame 46 and the lateral frames 48, 49 have lateral upper and lower ends of the flat plate bent laterally and slidable laterally in the lateral sliding bodies 50, 51, 52.
And a vertical rodless cylinder 53 having axial centers in the vertical direction on the outer surfaces of the horizontal slide bodies 50, 51, 52.
Is provided. Among these sliding bodies, the lateral moving body 52 provided on the rodless cylinder frame 46 serves as a moving source. Reference numeral 54 is a vertical slide body located at the lower end of the vertical rodless cylinder 53 and capable of sliding in the vertical direction. The horizontal sliding bodies 50, 51, 52 and the vertical sliding body 5
Although the number of forward / reverse rotations of the forward / reverse rotation motor 43 for moving the moving body 39 to the predetermined position and the moving body 39 to the predetermined position is not shown, it is controlled by a microcomputer.

A support plate 55 whose upper end portion is bent in the horizontal direction is provided on the upper surface of the vertical sliding member 54, and receiving plates 56 are opposed to the left and right end portions of the upper surface of the support plate 55 in a front view. It is provided. Also, a hanging bar 5 is attached to the receiving plate 56.
7. The supporting bar 59 is provided integrally with the hanging bar 57, and has a gripper 69 at the lower end at the left and right ends of the hanging bar 57.
Is provided.

The gripping tool 1 is provided with a retractable air cylinder 60 at the lower end of a support bar 57 so as to be detachable. A piston 61 is attached to the lower end of the air cylinder 60.
A clamp guide mounting body 64 having a slidable hole 62 and a clamp guide 63 at the lower end is detachably provided. The air cylinder 60 is configured to move the piston 61 in the arrow direction (vertical direction) by supplying air to the air cylinder 60 or exhausting air from the air cylinder 60 by the operation of the solenoid valve 65. The clamp guide mounting body 64 is formed by bending both left and right ends of the flat plate downward to form a front view gate shape, and forms an inverted U-shaped groove 66 from the lower end face at each of the left and right bent portions.
Is provided. A round shaft pin 67, which has a shaft center in the lateral direction and is fitted in the groove 66, is inserted through the lower end of the piston 61. Then, the pin 67 is fixed by a nut 68 provided on the piston 61, and the outer diameter of the pin 67 is held in the groove 66 by a gripper 69.
It has a size that can be brought in. The grasping tool 69 is formed of a leaf spring having a thickness of about 0.8 mm, and is provided in an inverted U shape (the opening angle in the free state is about 30 degrees) in a side view and has a tooth shape facing the lower end. The claw portion 70 is provided.

The concave portion 26 is formed to have a width larger than that of the claw portion 70 in the opened state, and the claw portion 70 can be opened and closed in the concave portion. Reference numerals 71 and 72 denote switches (in the embodiment, pin push button type micro switches) provided on the pins 67 above the left and right ends of the resin plate 1. The switches (not shown) that are turned "ON" and "OFF" by operating the switches 71 and 72 and the foot petal 73 are connected to the program controller 74, respectively. In addition, the program controller 74
Communicates with a sensor 75 for detecting a preset range of movement of the piston 67 and a solenoid 79 provided so as to be able to communicate with guide tubes 77, 78 for guiding compressed air by the pump 76 to the air cylinders 60, 60. 80 is both plates 4
A holding detection sensor (for example, a photoelectric type, an ultrasonic type, a capacitance type, etc., which is not limited to this) for detecting that the resin plate 1 is held by the two plates 4. The program controller 74 is contacted.

A space above the upper surface of the fixed plate 5 is a space.
A sensor mounting plate 82 is provided via the sensor 81, and a sensor for detecting that the mold 12 has moved toward the other mold 24 and has reached the mold clamping position (push-off position) on the sensor mounting plate 82 (implementation). In the example, a limit switch 85 having an arm 84 to which a sensing roller 83 is attached is detachably provided. The sensor 85 may be provided near the position, such as before reaching the mold clamping position, instead of at the mold clamping position, and non-contact type detecting means is also considered, and any means may be used as the position detecting means. .

Reference numerals 86 and 87 are solenoids for switching the solenoid valve 88, and 89 is an air compressor provided so as to communicate with the solenoid valve 88. The solenoid valve 88 communicates with the cylinder 28.
Reference numeral 90 denotes a heater (in the embodiment, a plate heater is used) provided on the inner surface of the fixing plate 5 and in the hole 23 of the mold 24.
The heater 90 is capable of adjusting the temperature (80 to 90 ° C. is selected in the embodiment), the temperature controller 91.
And a power supply (200 volts in the example) 92. The heater 90 is configured to heat at least the corner portion of the molded product 27, and is turned "ON" when the resin plate 1 is supplied to the heating device 34, and when the molding work is completed, " It is configured to be "OFF".

Next, the operation will be described. First, the resin plates 1, which are a plurality of base plates, are aligned in a predetermined position of the furnace 31 of the preheating device 30, and the heater 32 is ignited to heat the temperature in the furnace to heat the resin plates 1. About 1
The temperature is raised to 00 to 120 ° C. In this connection, the water in the resin plate is being removed (this step requires preheating from around 8 pm the night before if the molding work is performed from the day before the molding process, for example, from 8 am start).

When the preheating is completed, the start switch (not shown) is turned on. Then, when the vertical sliding body 54 descends and both switches 71, 72 hit the resin plate 1 and become "ON", the program controller 74 which receives this signal outputs an excitation signal to the solenoid valve 79. Then, the air in the air cylinder 60 is discharged from the solenoid valve 79 through the guide pipe 77, while the compressed air sent by the pump 76 is passed from the solenoid valve 79 through the guide pipe 78 to the air cylinder 6.
0 is entered and the piston 61 is moved upward (in the direction of arrow a). After that, when the sensor 75 detects that the piston 61 has reached a predetermined position, the program controller 74, which receives a signal from the sensor 75, stops the previously output excitation signal to the solenoid valve 79. The piston 61 is held in that position.

Further, in association with the movement of the piston 61, the pin 67 also moves in the same direction and pushes the grasping tool 69 to enter the groove 66 at a predetermined position, so that both the claw portions 70 move inward. Then, it bites into the edge of the preheated resin plate 1. Therefore, since the resin plate 1 is strongly gripped and the resin plate 1 does not drop from the gripper 69, the subsequent heating / molding steps are smoothly performed to obtain a molded product 27 of good quality. be able to.

Next, the vertical sliding body 54 is raised to a predetermined position of the vertical rodless cylinder 53. In this case, the gripping tool 6
The resin plate 1 held by 9 also moves in the same direction, and the lower end is located above the furnace 31. That is, the resin plate 1 is located above the furnace 31. Next, the lateral sliding body 52
Stops moving when the rodless cylinder of the rodless cylinder frame 46 reaches a predetermined position in the lateral direction (left side in front view). Therefore, in association with the movement of the horizontal slide body 52, the vertical rodless cylinder 53, the resin plate 1 and the like also move to a predetermined position in the same direction (upper position of the central portion of the heating device 34). Next, when the vertical slide body 54 descends to a predetermined position, the resin plate 1 descends in relation to this and enters the central portion of the furnace 35 heated by the heater 36. Then, when the temperature of the resin plate 1 reaches about 160 to 170 ° C. (in the case of the thickness of 3 mm, the temperature rising time to about 165 ° C. was about 2 minutes), the vertical sliding body 54 was moved again. Ascend and return to the original predetermined position. In connection with this, the heat-treated resin plate 1 also moves above the furnace 35.

In this case, the resin plate 1 is preliminarily heated by the preheating device 3
Since the water is removed by heating in the furnace 31 of No. 0, the foaming of the resin plate 1 supplied to the furnace 35 of the heating device 34 can be prevented and the quality can be stabilized. Then, the resin plate 1 is set to about 160 to 17
By heating to 0 ° C., foaming can be prevented and molding to be performed later can be facilitated, and the quality of the molded product 27 can be improved. Moreover, since the heating time of the resin plate 1 in the furnace 35 is short, the work can be shortened.

When the resin plate 1 is supplied to the heating device 34, the electric circuit of the power source 92 communicates with the heater 90 to energize it. This heater 90 sets the ambient temperature to about 85 ° C. after energization. Next, the horizontal slide body 52 moves to the middle portion of the rodless cylinder of the rodless cylinder frame 46, and the vertical slide body 54 descends to a predetermined position, so that the resin plate 1 also relates to the mold 12 and the mold. A predetermined position between 24 is reached.
Subsequently, when the solenoid 86 is energized and excited to operate the solenoid valve 88, the compressed air from the air compressor 89 is sent into the chamber of the cylinder 28 through the solenoid valve 88 and the pipe, so that the piston 29 moves forward and moves. Since the plate 10 is moved toward the mold 24, the mold 12, the pressing plate 20 and the like are moved in the same direction. When the plate 4 provided on the pressing plate 20 and the plate 4 provided on the mold 24 reach a predetermined position, the sandwiching detection sensor 80 outputs information to the program controller 74 that the both plates 4 are sandwiching the resin plate 1. To do. Then, the program controller 74 outputs an excitation signal to the solenoid valve 79, so that the air in the air cylinder 79 is discharged from the solenoid valve 79 through the guide tube 78, while the compressed air sent by the pump 76 is solenoid-operated. From the valve 79 through the guide tube 77, the air cylinder 60 is entered, and the piston 61 is moved downward (the side opposite to the arrow A direction). Therefore, the pin 67 also moves in the same direction as that to release the pushing of the gripper 69, so that the claw portion 70 of the gripper 69 opens and releases the resin plate 1.

Then, in relation to the movement of the movable plate 10, the mold 1
The second convex portion 15 further advances and enters the hole 23 of the mold 24 for molding, but at the time of this molding, when a pressure more than a predetermined value is applied to the holding plate 20, the piston 18 slides on the cylinder 17. Since it retreats, it does not hinder the molding work. Further, as described above, since the claw portion 70 is open, the flow of the end portion of the resin plate 1 is improved and the local residual strain is prevented from occurring. At the same time, the thickness of the molded product 27 is less changed and the quality can be improved. Further, at the time of this molding, since the bent portion (corner portion) of the molded product 27 facing the heater 90 is heated by the heater 90, the molding accuracy of the molded product 27 does not occur because no waviness occurs. Can be improved.

After that, when the convex portion 15 of the mold 12 reaches the mold clamping position (when the molding operation is completed), the upper end portion of the movable plate 10 also hits the sensing roller 83 and rotates the arm 84 to limit it. The switch 85 is turned “ON”. Then the solenoid 8
Since 7 energizes the solenoid valve 88, the compressed air from the air compressor 89 is sent to the chamber of the cylinder 28 through the solenoid valve 88 and the pipe in connection therewith. As a result, the piston 29 retracts to return the movable plate 10 to the original position, but the convex portion 15 of the mold 12
Also separates from the molded product 27. It should be noted that the piston 18 moves forward until the movable plate 10 is in the middle of retreating, and the end portions (flange portions) of the molded product 27 are held between the two plates 4.

Then, the piston 18 starts to retreat together with the cylinder 17 from the most advanced position when the piston 29 retracts to a predetermined intermediate position. At this time, the holding detection sensor 80 becomes "OFF". Then, the program controller 74 outputs an excitation signal to the solenoid valve 79,
The air in the air cylinder 60 is discharged from the solenoid valve 79 through the guide pipe 77, while the compressed air sent by the pump 76 enters the air cylinder 60 from the solenoid valve 79 through the guide pipe 78 and the piston 61.
To the upper side (direction of arrow a).

After that, the sensor 61 sends the piston 61 to the sensor 61.
Is detected to have reached a predetermined position, this sensor-75
Since the program controller 74 which has input the signal from the above stops the excitation signal to the solenoid valve 79 which has been output previously, the piston 61 is held in that position. Further, in association with the movement of the piston 61, the pin 67 also moves in the same direction and enters the predetermined position of the groove 66 while pushing the gripping tool 69, so that both the claw portions 70 move inward and are molded. Holds the flange of product 27 to prevent it from falling.

After the molding work, the convex portion 15 of the mold 12 is
The power supply 92 turns off when the heater 9 moves backwards.
Stop outputting the heating signal to 0. Next, the vertical slide body 5
4 moves up the vertical rodless cylinder 53 and returns to the original position, and the molded product 27 held by the holding tool 69 also moves up and is positioned above the molding press device 2. Subsequently, the lateral slide body 52 laterally moves the rodless cylinder of the lateral rodless cylinder frame 46 and stops when it reaches a predetermined position (above the preheating device). When the forward / reverse rotation motor 43 is driven, the rotary power rotates the rotary shaft 38 via the motor shaft 44 and the coupling 42. In connection with this, the transport frame 45 moves forward, that is, the worker. To the predetermined position on the side. Therefore, the operator is
Is lowered to a predetermined position, and when the foot petal 73 is stepped on at the product take-out position, the claw portion 70 is opened and the separated molded product 27 is collected.

[Brief description of drawings]

FIG. 1 is a plan view of a resin plate molding apparatus.

FIG. 2 is a front view of a resin plate molding apparatus.

FIG. 3 is a side view of a transport frame.

FIG. 4 is a side view of the mold in a closed state.

FIG. 5 is a side view of the mold opened state.

FIG. 6 is a front view of the suspended resin plate.

FIG. 7 is a front view of a gripping tool.

FIG. 8 is a side view of the gripping tool with the claw portion opened.

FIG. 9 is a side view of the gripping tool with the claws closed.

FIG. 10 is a circuit diagram of air circulation.

FIG. 11 is an electric circuit diagram.

[Explanation of symbols]

 1 Resin plate 3 Sliding surface 4 Plate 12 type 24 type 69 Grasping tool

Claims (1)

[Claims] 1. Molds 12, 24 for sandwiching and molding a heated resin plate 1 held by a gripping tool 69 are provided, and a sliding surface 3 is provided on the surface of the mold 12 and / or the mold 24 on the side of holding. A resin plate molding apparatus characterized in that a plate 4 is provided, and when the plate 4 holds the resin plate 1 or immediately before or after the resin plate 1 is held, the holding tool 69 is released.