JPH0357843B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an automatic connection/disconnection device for gas-liquid medium pipes for controlling the temperature of a mold for injection molding.

[Conventional technology]

There are many cases where molds such as injection molding machines have liquid flowing into the pipes installed in them to adjust the temperature, and for this purpose, both fixed and movable molds have traditionally been installed on fixed and movable plates, respectively. After that, a system was proposed in which the supply port on the fixed plate side was connected to the receiving port on the mold side by means of an actuator for connecting and separating the conduit provided on the fixed plate or the like. Although such a mechanism allows automatic contact and separation of gas-liquid media, it has the following drawbacks. That is, since an actuator is used as the first device, the device becomes complicated and the cost is high. Secondly, the next process cannot be started while the actuator is operating, which takes time and reduces productivity. Third, it is necessary to accurately center the supply port and the receiving port of the piping coupler, which makes processing and installation difficult and increases costs.

[Purpose of the invention]

The present invention eliminates these drawbacks, and its purpose is to automatically connect and separate the gas and liquid medium pipes by the operation of attaching the mold to a fixed plate or a movable plate without using an actuator. An object of the present invention is to provide an automatic connecting/separating device for a gas-liquid medium pipe to a mold, which is low in cost, has a short operating time, and has high productivity.

[Key points of the invention]

The gas-liquid medium pipe automatic connection/separation device according to the present invention includes:
A supply side block has one side of a gas/liquid medium supply conduit opened on a plane substantially parallel to the mold mounting surface of the molding machine, and a gas/liquid medium supplying pipe is opened on one side of the gas/liquid medium supply conduit on a plane substantially parallel to the mold mounting surface of the mold. It consists of a receiving side block with one side open of a gas-liquid medium receiving conduit connectable to the medium supplying conduit, and packing provided on one side of the opposing surfaces of the supplying side block and the receiving side block,
The present invention is characterized in that the gas-liquid medium supply conduits and the gas-liquid medium supply conduits of the two blocks are tightly connected when the mold is attached to the molding machine.

[Embodiments of the invention]

The present invention will be explained below with reference to FIGS. 1 and 2 showing one embodiment. Molding machine fixed plate 11
A supply side block 13 having a conduit 12 for supplying a gas-liquid medium is attached to one side, and one side of the conduit 12 has a large diameter, and a packing 14 such as an O-ring is provided there. . Further, the surface of the supply block 13 on the side where the gasket 14 is provided is substantially parallel to the mold mounting surface of the stationary platen 11. A receiving side block 17 having a conduit 16 for receiving bubble medium is attached to one side of the fixed mold 15 attached to the fixed platen 11, and the conduit 16 is located at a position that almost coincides with the center of the conduit 12. . Further, the surface of the receiving block 17 facing the supplying block 13 is substantially parallel to the mounting surface of the fixed mold 15.

The operation of the embodiment described above will be explained. Fig. 1 shows the state before the fixed mold 15 is attached to the fixed platen 11, and Fig. 2 shows the state after the fixed mold 15 is attached to the fixed platen 11. By attaching the supply block 13 and the receiving block 17 to each other, the gas-liquid medium supply pipe 12 and the gas-liquid medium receiving pipe 16 are connected more closely to the packing 14. Therefore, if gas or liquid is sent to the pipe line 12 through a pipe (not shown), it is sent from the pipe line 16 to the fixed mold 15 via a pipe (not shown).

Although one block 13 and 17 is shown attached to each of the stationary platen 11 and the stationary mold 15, two or more blocks 13 and 17 may be installed. Moreover, although the fixed platen 11 and the fixed mold 15 have been described, the same applies to the movable platen and the movable mold (none of which are shown).

FIGS. 3 and 4 show another embodiment of the present invention, in which a supply block 21 is attached to one side of the stationary platen 11, the supply block 21 having one surface substantially parallel to the mold mounting surface of the stationary platen 11. A gas-liquid medium supply pipe line 22 is open from the other side of the supply block 21.
The diameter of the tip is enlarged and there is a snap spring 2 there.
3, the valve seat 24 is fixed. T is attached to the valve seat 24 by a snap spring 25.
A letter-shaped guide 26 is attached, and the guide 2
A needle valve 27 having a conical shape with a cut off tip and a protrusion 27A is inserted into the needle valve 6, and a spring 2 is inserted between the needle valve 27 and the guide 26.
8, the needle valve 27 is pushed to the left as shown in FIG. 3, and the conical surface contacts the seat surface of the valve seat 24, closing the valve mechanism. A gasket 29 such as an O-ring is provided in a groove on the outer periphery of the insertion hole of the valve seat 24 of the supply block 21.

A receiving block 31 having one surface substantially parallel to the mounting surface of the fixed mold 15 is attached to one side, and a gas-liquid medium is supplied from the other surface of the receiving block 31 to a position corresponding to the pipe line 22 of the supply block 21. A receiving pipe line 32 is provided. At the tip of the conduit 32 are a valve seat 24, a snap spring 25, and a guide 2.
6, a needle valve 27, and a spring 28, all of which are the same as those on the supply block 21 side, so their explanation will be omitted. A push member 34 is inserted into a bottomed hole 35 on the outside of the supply block 21 via a guide 33. The push member 34 has a hole in the center and a spring 36 is installed in this hole, so the push member 34 is always on the left side. A ball 38 is provided at the tip of the hole 37. Note that the hole at the left end of the pushing member 34 may be eliminated and the pushing member 34 may be operated by pressure oil instead of the spring 36. Further, the pushing member 34 and the like may be provided on the receiving block 31.

To explain the operation of the above-mentioned embodiment, FIG. 3 shows the stationary mold 15 before it is attached to the stationary platen 11, and FIG. 4 shows it after it is attached. When the fixed mold 15 is attached to the fixed platen 11, as shown in FIG. The liquid medium supply pipe 22 and the gas/liquid medium receiving pipe 32 of the receiving block 31 communicate with each other. At this time, the pushing member 34 is pushed by the receiving block 31 and retreats against the spring 36. The mold of this embodiment is placed on a base (not shown) via loading/unloading rollers and can be moved with relatively light force, so when the fixed mold 15 is removed from the fixed platen 11, the receiving block is removed. 31 is pushed back together with the fixed mold 15 by the pushing member 34, communication between the two pipes 22 and 32 is cut off, and the flow of the gas-liquid medium into the fixed mold 15 is stopped.

FIG. 5 shows a state before the fixed mold 15 is attached to the fixed platen 11 in still another embodiment of the present invention, and parts equivalent to those in FIGS. 3 and 4 are given the same reference numerals. A detailed explanation will be omitted and only the different parts will be explained. In contrast to the system shown in FIG. 3 in which the needle valves 27 of the supply side block 21 and the receiving side block 31 are arranged in a straight line, in this embodiment, the needle valves 27 of the supply side block 51 and the receiving side block 52 are arranged in a straight line.
are arranged with different phases. For this reason, the gasket 53 provided in the groove of the supply block 51 is larger than the gasket 29 shown in FIG. 3, and the valve seat 54 has its front surface removed and is depressed below the facing surface of the supply block 51 and the receiving block 54.

The operation of this embodiment will be explained. When the fixed mold 15 is attached to the fixed platen 11, in the method shown in FIG.
The needle valves 27 of the supply side block 51 retreated by being pushed against each other, but in this embodiment, the needle valve 27 of the supply side block 51 was pushed by the receiving side block 52 and retreated;
The needle valve 27 is pushed back by the receiving block 51, and the gas-liquid medium supply pipe 22
The only difference is that the fluid flowing in from the valve seat 54 passes between the valve seat 54 and the needle valve 27, and flows from the gap between the valve seat 54, the receiving block 52, and the supplying block 51 to the gas-liquid medium receiving conduit 32.

In this embodiment, the gap A between the supply side block 51 and the receiving side block 52 is smaller than that of the system shown in FIG. This has the advantage of immediately stopping the gas-liquid medium from flowing into the fixed mold 15.

FIG. 6 also shows still another embodiment of the present invention, and this example shows a supply block 51 on the fixed platen 11 side.
is exactly the same as FIG. 5, but the receiving block 61 on the side of the fixed mold 15 does not have the needle valve 27, etc., and the gas-liquid medium receiving conduit 32A extends long and its tip is recessed from the surface of the receiving block 61. Therefore, when the fixed mold 15 is attached to the fixed platen 11, the needle valve 27 of the supply block 51 is pushed back by the receiving block 61, and the gas-liquid medium supply conduit 22 is moved back.
The fluid flowing in passes between the needle valve 27 and the valve seat 54, passes through the gap between the valve seat 54 and the receiving block 61, and flows into the gas-liquid medium receiving conduit 32A.

〔Effect of the invention〕

According to the present invention, a supply side block and a receiving side block are attached to each of the fixed plate and the fixed mold, and each block is provided with a gas-liquid medium supply conduit and a gas-liquid medium receiving conduit, and both conduits are provided. The fixed mold was configured to be tightly connected when attached to the fixed platen. Therefore, the mechanism is simple, the cost is low, and since there are no complicated parts, it is easy to operate and has a long life. Furthermore, if the fixed mold is attached to the fixed platen, the above-mentioned two pipes are connected, so that molding can be performed immediately, which has many advantages such as increasing productivity.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a sectional view before the fixed mold is attached to the fixed plate, and Figure 2 being a sectional view after the fixed die is attached to the fixed plate. 3 and 4 show other embodiments of the present invention; FIG. 3 is a sectional view before the fixed mold is mounted on the fixed plate; and FIG. 4 shows the fixed mold mounted on the fixed plate. 5 and 6 are sectional views showing different aspects of other embodiments of the present invention before the fixed mold is attached to the fixed platen. 11... Fixed plate, 12, 22... Gas-liquid medium supply conduit, 13, 21, 51... Supply side block,
15... Fixed mold, 16, 32, 32A... Gas-liquid medium receiving conduit, 17, 31, 52... Receiving side block, 29, 53... Packing.

Claims (1)

[Scope of Claims] 1. A fixed platen with a fixed mold attached, a movable platen with a movable die that moves forward and backward with respect to the fixed platen, and a mold of both plates attached to the fixed platen or the movable platen. a supply side block having a plane substantially parallel to the mounting surface, on which one side of the gas-liquid medium supply conduit is opened; When installed on a fixed plate or a movable plate, the mold has a plane that is substantially parallel to the mold surface that is in contact with the mold mounting surfaces of both plates, and one side of the gas-liquid medium receiving conduit is placed on the same plane. provided on either one side of the open receiving side block and the open facing surfaces of the conduits of both blocks,
An apparatus for automatically attaching and separating a gas-liquid medium pipe to a mold, which comprises a packing that tightly connects the pipe when the two plates and the mold are respectively attached. 2 At least one of the blocks is provided with a needle valve that is closed when the mold is removed from its respective mounting plate and opened when the mold is mounted on its respective mounting plate. An automatic connection/detachment device for a gas-liquid medium pipe line to a mold as set forth in claim 1. 3 By providing a pushing member operated by a spring or hydraulic pressure on either side of the two blocks, the mold can be quickly removed from the mold mounting surface when the mold is released from the fixed platen or the movable platen. 2. The device for automatically attaching and detaching a gas-liquid medium pipe to a mold according to claim 1, wherein the device is adapted to be moved backward.