JPH11264478A - Pneumatic integrated valve used for thermoforming machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To simplify and omit piping by integrating a plurality of pneumatic switching valves used for operation control of various devices into one unit, and to perform a series of molding operations. To provide an integrated pneumatic valve to increase speed. SOLUTION: Side faces of respective blocks provided with a plurality of specified poppet type two-way switching valves and a poppet type three-way switching valve, and provided with a discharge port of these switching valves and a supply port for supplying air. Were closely connected to each other by tie bolts, and they were integrally connected and juxtaposed, and each of the discharge ports having the same size was connected to each other so as to communicate internally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated valve in which a plurality of pneumatic switching valves used for controlling the operation of various devices such as pneumatic cylinders in a thermoforming machine are integrated into a single unit. .

[0002]

2. Description of the Related Art In a conventional general thermoforming machine, for example, as shown in a pneumatic circuit diagram in FIG. 6, a large number of pneumatic switching valves are connected by piping to control the operation of various devices. Has been used. Thus, in the figure, a pipe a is provided between the three-way switching valve for "pneumatic air" (a) and (b), and a "vacuum"
A pipe b between the three-way switching valve C and the two-way switching valve d, and a pipe c between the three-way switching valve E for the "sub-vacuum" and the two-way switching valve,
The three-way switching valve for "release" is connected by a pipe d. A pipe e is provided between the connection point R of the three-way switching valve B and the “lower table”, a pipe f is provided between the three-way switching valve H and the connection point R, and a pipe is provided between the connection point nu of the “upper table” and the pipe f. g, a pipe h between the two-way switching valve d and the pipe f, a pipe i between the two-way switching valve and the pipe h, a two-way switching valve and a "vacuum tank".
Are connected by a pipe j.

[0003]

In the above-described pneumatic circuit of the conventional thermoforming machine, the connection between the switching valves used for the operating parts such as "compressed air", "vacuum", and "release" is made by piping a to a.
Since the process is performed in j, the flow path resistance of those pipes is increased, and it is very difficult to increase the speed of a series of molding operations. In addition, the space required for the piping is large, and the piping work is extremely troublesome.

An object of the present invention is to simplify and omit piping by integrating a plurality of pneumatic switching valves used for operation control of various devices in a thermoforming machine into a single unit. It is an object of the present invention to provide an integrated pneumatic valve for improving a series of molding operation speeds.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a discharge port provided with a valve seat to which a valve attached to the tip of a piston body comes in contact with and separates from, and a supply port for supplying air. The block provided, a cylinder accommodating the head side of the piston body, and a head cover closing one opening of the cylinder are hermetically connected in order, and an electromagnetic pilot valve is provided on the cylinder side. A poppet type two-way switching valve provided so as to shut off or communicate the supply port and the discharge port by controlling the advance / retreat operation of the piston body by supplying compressed air into the cylinder by operation,
A discharge port provided with a valve seat to which a first valve mounted at the tip of the piston body or a second valve mounted at an intermediate position comes and goes,
A first supply port for supplying air on the first valve side;
A block provided with a second supply port for supplying air on the valve side, a cylinder accommodating a head side of the piston body,
A head cover that closes one open port of the cylinder is airtightly connected in order, and an electromagnetic pilot valve is provided on the cylinder side, and compressed air is supplied into the cylinder by the operation of the electromagnetic pilot valve to advance and retract the piston body. By controlling the second supply port and the discharge port, the first supply port and the discharge port are communicated with each other, or the first supply port and the discharge port are blocked with the second supply port and the discharge port. A plurality of poppet-type three-way switching valves provided so as to communicate with the outlets; the side surfaces of the blocks are brought into close contact with each other and integrally connected by tie bolts to form the poppet-type two-way switching valve and the poppet; It is characterized in that a three-way switching valve is provided side by side, and the discharge ports of the same size are communicated internally.

[0006]

Since a plurality of poppet type two-way switching valves and a poppet type three-way switching valve are integrally connected to each other by tie bolts with the side surfaces of each block closely contacted, the pneumatic pressure of the thermoforming machine is reduced. In the circuit, pipes required for connection between switching valves used for operating parts such as “compressed air”, “vacuum”, and “release” are omitted and simplified. In addition, the flow resistance of the pipe is reduced, and the switching valve and the like can be installed close to the operating part such as the mold, so that a series of molding operation speeds can be increased.

[0007] According to the pneumatic integrated valve used in the thermoforming machine, a plurality of pneumatic switching valves used for controlling the operation of various devices are integrated into a single unit to simplify and omit piping. Therefore, it is possible to improve the speed of a series of molding operations. Further, there is an advantage that the space required for piping as a whole is small, and piping work is easy.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a vertical side view of a poppet type two-way switching valve, FIG. 2 is a vertical side view of a poppet type three-way switching valve, and FIG. 3 is a pneumatic integration in which a poppet type two-way switching valve and a poppet type three-way switching valve are juxtaposed. FIG. 4 is a plan view of the valve, FIG. 4 is a piping diagram showing a state where the pneumatic integrated valve is attached to the molding machine, and FIG.
FIG. 3 is a pneumatic circuit diagram of the molding machine.

As shown in FIG. 1, a rectangular parallelepiped block 11 of a poppet type two-way switching valve 10 has a discharge port 12 provided with a valve seat 13 to which a valve 18 mounted on the tip of a piston body 17 comes in contact with and separates. And a supply port 15 for supplying air to the valve chamber 14. Both sides of the block 11 are machined in parallel,
The discharge port 12 is provided so as to penetrate to both side surfaces. Reference numeral 16 denotes a plurality of through holes formed in the side surface of the block 11. The opening of the valve chamber 14 has a cylinder 20.
The small-diameter portion 21 on one end side of the cylinder
The head 17 of the piston body 17 is housed in the inside, and the piston body 17 is provided to be freely movable in the front-rear direction. Reference numeral 22 denotes a head cover which is hermetically attached so as to close one opening of the cylinder 20 (the head 19 side). The head cover 22 has a pilot hole 23 that opens directly on the rear surface 19a of the head 19 of the piston body 17,
A pilot hole 24 communicating with a through hole 20 a formed in the cylinder 20 is formed so as to face the front side 19 b of the cylinder 9. A bolt (not shown) passed through the head cover 22 is fastened to the block 11 to fix the cylinder 20 and the head cover 22 together. An electromagnetic (electromagnetic / pneumatic) pilot valve 26 is provided on the front side of the head cover 22.
The port 28 of the pilot valve 26 is connected to the pilot hole 23, and the port 29 is connected to the pilot hole 2.
4 are provided so as to correspond to the respective items.

However, when the electromagnetic pilot valve 26 is not energized, the compressed air always flows from the port 28 through the pilot hole 23 into the cylinder 20 to advance the piston body 17, so that the valve 18 contacts the valve seat 13. In contact with supply port 15
And the discharge port 12 are shut off. On the other hand, at the time of energization, the compressed air flows from the port 29 through the through hole 20a into the front side 19b of the head 19 to retract the piston body 17, so that the valve 18 separates from the valve seat 13 and the supply port 15 and the discharge port 1
2 communicates. As described above, the poppet type two-way switching valve 1
0.

As shown in FIG. 2, the rectangular parallelepiped block 31 of the poppet type three-way switching valve 30 has a valve seat 33 to which a first valve 43 attached to the tip of a piston body 42 comes into contact with and separates from the piston body. 42, a discharge port 32 provided with a valve seat 34 to which a second valve 44 is attached and detached, a first supply port 36 for supplying air to a first valve chamber 35, and a second valve chamber. 37
And a second supply port 38 for supplying air to each of them. Both sides of the block 31 are processed in parallel, and the discharge port 3
2 is provided so as to penetrate to both side surfaces. Reference numeral 39 denotes a plurality of through holes formed in the side surface of the block 31.
Reference numeral 40 denotes a cap for closing the opening of the first valve chamber 35.

A small-diameter portion 51 at one end of a cylinder 50 is airtightly fitted into the opening of the second valve chamber 37, and the head 45 of the piston body 42 is housed in the cylinder 50 so that the piston body 42 Is provided to be freely movable in the front-rear direction. Reference numeral 52 denotes a head cover which is hermetically attached so as to close one opening of the cylinder 50 (the head 45 side). The head cover 52 has a pilot hole 53 that opens directly on the rear surface 45a of the head 45 of the piston body 42, and a pilot hole that communicates with a through hole 50a formed in the cylinder 50 so as to face the front surface 45b of the head 45. A hole 54 is provided. A bolt (not shown) passed through the head cover 52 is tightened to the block 31 so that the cylinder 5
0 and the head cover 52 are fixed together. An electromagnetic (electromagnetic / pneumatic) pilot valve 56 is mounted on the front side of the head cover 52, and a port 58 of the pilot valve 56 is provided in the pilot hole 53, and a port 59 is provided so as to correspond to the pilot hole 54.

When the electromagnetic pilot valve 56 is not energized, compressed air always flows from the port 58 through the pilot hole 53 into the cylinder 50 to move the piston 42 forward. As a result, the second valve 44 comes into contact with the valve seat 34 to shut off the second supply port 38 and the discharge port 32, and the first valve 43 separates from the valve seat 33 and the first supply port 36 and the discharge port 32
Communicates with On the other hand, when power is supplied,
9 through the through hole 50a to flow into the front side 45b of the head 45 to retract the piston body 42. Thereby, the first
The valve 43 comes into contact with the valve seat 33 and the first supply port 36 and the discharge port 3
2 is shut off, the second valve 44 is separated from the valve seat 34, and the second supply port 38 and the discharge port 32 communicate with each other. Thus, the poppet type three-way switching valve 30 is configured.

FIG. 3 shows the pneumatic integrated valve V. Its pneumatic integrated valve V, a plurality of poppet-type two-way changeover valve 10 _1, 10 ₂ formed of the above construction, · · · 10 _n and a poppet-type three-way valve _{30 1, 30 2, ··· 30} n of Each block 1
11 ₁ , 11 ₂ ,... 11 _n , 31 ₁ , 31 _{2 ,.}
And the mounting brackets 65 and 66 are applied to the switching valves on both sides so that four tie bolts 6 are attached.
7 and are integrally arranged side by side. Wherein each outlet is, 25A (1 "), 32A (1 1/4"), 50
A (2 ") or the like is the same size and is configured to communicate internally.

FIG. 4 shows a part of a state where the integrated pneumatic valve V having such a configuration is mounted on a molding machine based on the pneumatic circuit diagram of FIG. 5 and associated piping is provided. The pneumatic circuit diagram of the molding machine shown in FIG. 5 is an alternative to the conventional pneumatic circuit diagram shown in FIG. 6, and by adopting the pneumatic integrated valve V of the present invention surrounded by a dashed line, the conventional pneumatic circuit diagram is not necessary. All of the pipes a to j that have been used can be omitted. 3 and 5, the poppet type two-way switching valve 10 ₁ for “pressurized air”, the poppet type three-way switching valve 30 ₁ for “lower mold forming”,
30 ₂ "exhaust", "sub-vacuum", "release" and "vacuum"
For use with poppet type two-way switching valves 10 ₂ , 10 ₃ , 10
₄ and 10 ₅ . The electromagnetic pilot valves 26 ₁ , 26 ₂ , 26 ₃ , 26 ₄ , 26 ₅ , and 56 ₁ corresponding to the above-described switching valves,
56 ₂ is connected as indicated by the switching valve and the broken line.

As described above, according to the integrated pneumatic valve used in the thermoforming machine, a plurality of pneumatic switching valves used for controlling the operation of various devices are unitized as one unit.
The piping can be simplified and omitted, and the speed of a series of molding operations can be improved. Furthermore,
The space required for piping as a whole was small, and piping work was facilitated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a poppet type two-way switching valve.

FIG. 2 is a longitudinal side view of a poppet type three-way switching valve.

FIG. 3 is a plan view of an integrated pneumatic valve in which a poppet type two-way switching valve and a poppet type three-way switching valve are juxtaposed.

FIG. 4 is a piping diagram showing a state in which the pneumatic integrated valve is attached to a molding machine.

FIG. 5 is a pneumatic circuit diagram of a molding machine.

FIG. 6 is a conventional pneumatic circuit diagram of a molding machine.

[Explanation of symbols]

V → Pneumatic integrated valve 10 → Poppet type two-way switching valve 11 → Block 12 →
Discharge port 13 → valve seat 15 → supply port 17 → piston body 18 → valve 19 → head 20 → cylinder 22 → head cover 26 → solenoid pilot valve 30 → poppet type three-way switching valve 31 → block 32 →
Discharge ports 33, 34 → valve seat 36 → first supply port 38 → second supply port 42 → piston body 43 → first valve 44 → second valve 45 → head 50 → cylinder 52 → head cover 56 → electromagnetic pilot valve

Claims (1)

[Claims] 1. A block provided with a discharge port provided with a valve seat to which a valve mounted on the tip of a piston body comes in contact with and separates from the valve body, a supply port for supplying air, and a cylinder for housing the head side of the piston body. And a head cover for closing one opening of the cylinder in an airtight manner, and an electromagnetic pilot valve is provided on the cylinder side, and compressed air is supplied into the cylinder by the operation of the electromagnetic pilot valve to advance and retract the piston body. By controlling the operation, a poppet type two-way switching valve provided so as to shut off or communicate the supply port and the discharge port, and a first valve mounted on the tip of the piston body or mounted at an intermediate position A discharge port having a valve seat with which the second valve comes and goes,
A first supply port for supplying air on the first valve side;
A block provided with a second supply port for supplying air on the valve side, a cylinder accommodating a head side of the piston body,
A head cover that closes one open port of the cylinder is airtightly connected in order, and an electromagnetic pilot valve is provided on the cylinder side, and compressed air is supplied into the cylinder by the operation of the electromagnetic pilot valve to advance and retract the piston body. By controlling the second supply port and the discharge port, the first supply port and the discharge port are communicated with each other, or the first supply port and the discharge port are blocked with the second supply port and the discharge port. A plurality of poppet-type three-way switching valves provided so as to communicate with the outlets; the side surfaces of the blocks are brought into close contact with each other and integrally connected by tie bolts to form the poppet-type two-way switching valve and the poppet; An integrated pneumatic valve for use in a thermoforming machine, wherein a three-way switching valve is juxtaposed and each of the outlets having the same size is communicated internally.