JPH066909Y2 - Foam molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a foam molding machine improved so that a die replacement operation can be performed safely and quickly.

[Conventional technology]

The foam molding machine is one in which pre-foamed resin particles are filled in the cavity of a molding die and subjected to treatment such as heat expansion and cooling to obtain a foamed resin molded article. The foam molding machine is equipped with a mold fixing means for fixing the molding mold on the die plate in a replaceable manner in order to obtain various resin foam molded products by itself. ing.

As shown in FIG. 6, the mold fixing means in the conventional foam molding machine includes a clamp lever 30 and a height adjusting bolt 3.
1, a loosening prevention nut 32, and a tightening bolt 33, and the mold fixing means 34 is
For example, four pieces are provided on each of the moving side die plate 36 and the fixed side die plate (not shown).

The clamp lever 30 has a back plate 3 at its tip.
The clamp allowance of the die 35 with 5a is pressed down. An elongated hole 30 is provided near the tip of the clamp lever 30.
a is formed, and the tightening bolt 33 is inserted into the elongated hole 30a. Tightening bolt 33
Is screwed into a screw hole 36a formed in the moving die plate 36 that supports the mold 35, and is clamped to push the clamp lever 30 downward. A screw hole 30b is formed near the rear end of the clamp lever 30, and the height adjusting bolt 31 is screwed into the screw hole 30b. The head of the height adjusting bolt 31 contacts the die plate 36 to adjust the clamp height. Also, the loosening prevention nut 32 is screwed onto the height adjusting bolt 31,
The screw hole 30b acts as a double nut to prevent loosening.

Then, in the foam molding machine provided with such a mold fixing means 34, when replacing the mold 35, the tightening bolts 33 in each of the eight mold fixing means 34 on the moving side and the fixed side are fixed. After the worker loosens it with a tool such as a spanner, and after replacing the mold, eight mold fixing means 3
The worker tightens each tightening bolt 33 in 4 ... with a tool such as a spanner.

[Problems to be solved by the device]

However, it takes a relatively long time to perform tightening and loosening of the tightening bolts 33 ... In the total of eight mold fixing means 34. Therefore, it is possible to shorten the mold replacement work. Therefore, the operating efficiency of the foam molding machine cannot be improved. Especially, since the eject pin and the filling device attached to the mold are attached to the mold in advance at other places, most of the time required for the mold replacement work is spent on bolting work. Become. In addition, when tightening and loosening the bolt 33 with a tool such as a spanner, a very strong force must be applied. However, if the spanner comes off the bolt 33 at this time, there is a risk that the operator may be overpowered and injured. There is Especially when the foam molding machine is large,
This is all the more because the bolting work is performed at a high place where the scaffolding is unstable. Further, according to such bolt tightening work, there is a possibility that the position of the mold shifts due to the force at the time of tightening, the cracking size is affected, and the mold is damaged. To prevent this,
Four mold fixing means 3 on each of the moving side and the fixed side
In 4 ..., it is necessary to tighten the bolts with equal force and to prevent partial tightening, so that it takes more time for bolting work.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a foam molding machine according to the invention as claimed in claim 1 clamps a mold by a biasing force of a spring, while unclamping the mold by a pressure liquid, a spring force mold fixing means. A mounting means for disposing and mounting the spring force mold fixing means at a desired position, and a liquid for generating the pressure liquid and switching supply and stop of the pressure liquid to the spring force mold fixing means. And a pressure device.

The foam molding machine according to the invention of claim 2 is provided with a hydraulic pressure die fixing means for both clamping and unclamping the die with a pressure liquid, instead of the spring force die fixing means. Is characterized by.

[Action]

According to the configuration of the invention of claim 1, the mold is set at a predetermined position, and the spring force mold fixing means is unclamped and mounted at a desired position, and then the switching valve is used to supply the hydraulic pressure. By stopping, the mold is clamped by the biasing force of the spring. This eliminates the need for bolt tightening work, which is a harmful effect of this bolt tightening work, that is, the danger of using a tool such as a spanner,
It is possible to eliminate the time loss required for tightening the bolts, the problems caused by the displacement of the mold position, and the like.

According to the configuration of the second aspect of the invention, since the pressure of the pressure is used for clamping, the clamping force larger than the spring force can be easily obtained and the mold holding reliability can be increased. Also, since unclamping is also performed with pressure liquid,
A member such as a spring for pushing back the liquid becomes unnecessary.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In the foam molding machine according to the present invention, as shown in FIG. 3, the fixed side die plate 4 is fixed to the fixed side mold 5 by two on the left and right, for a total of four (two are not shown). ) Is provided with the spring force die fixing means 3 ... Similarly, as shown in FIG. 4, the movement side die plate 1 has two left and right sides for fixing the movement side die 2. A total of four spring force mold fixing means 3, ... (Two are not shown) are provided.

As shown in FIG. 2, the die plates 1 and 4 are provided with tap holes 6 ... As mounting means so that the spring force die fixing means 3 can be mounted at a desired position. In addition, you may make it equip with a T groove and a T nut as a mounting means.

The mounting bolt 7 of the spring force die fixing means 3 is screwed into the tap hole 6 selected in relation to the size of the die. The mounting bolt 7 is inserted into an elongated hole 8a formed in the vicinity of the tip of the clamp lever 8 to guide the clamp lever 8 in the up-down direction and enable the clamp lever 8 to move back and forth. A lifting spring 10 is fitted around the mounting bolt 7 below the clamp lever 8 and above the clamp lever 8 while
A height adjusting nut 11 is screwed onto the threaded portion of the mounting bolt 7, and the clamp lever 8 is always kept in contact with the height adjusting nut 11 by the biasing force of the raising spring 10 described above. It is supposed to do.

Further, a hemispherical convex portion is formed on a lower portion of the main body 11a of the height adjusting nut 11, and a hemispherical convex portion is formed on an upper surface of a washer portion 11b formed separately from the main body 11a. The abutting state with no one-sided contact with respect to the rotation of the lever 8 is maintained.

The tip portion of the clamp lever 8 has a back plate 2a (5
It forms a clamp part that holds down the clamp allowance of the mold 2 (5) having a). A cylinder portion 13 is fixed to the rear end portion of the clamp lever 8 with a bolt (not shown). A piston rod 15 is built in the cylinder portion 13, and a rod portion 15 a of the piston rod 15 is included.
Is projected from the lower surface of the cylinder portion 13 to the die plate 1
It is designed to come into contact with the upper surface of (4). The piston portion 15b of the piston rod 15 is connected to the cylinder portion 1
The inside of 3 is divided into two upper and lower chambers, the upper chamber is a spring chamber 13a, and the lower chamber is an unclamping oil chamber 13b.

A plurality of disc springs 16 ... Are built in the spring chamber 13a, and the disc rods 16 are configured to constantly urge the piston rod 15 downward. The biasing forces of the disc springs 16 are set to be the same among the four spring force mold fixing means 3.

Further, an oil port 13c having a taper screw is communicated with the oil chamber 13b, and pressure oil is supplied from this oil port 13c. When the pressure oil is supplied, the disc spring 1
The piston rod 15 is pushed back by obtaining a force exceeding the urging force of 6 ...

Then, as shown in FIG. 1, each oil port 13c in the four spring force mold fixing means 3 for the moving side mold 2 has a hydraulic hose that allows the spring force mold fixing means 3 to move (see FIG. (Not shown) and a hydraulic pipe 17 are connected to a switching valve 19 for switching supply and stop of pressure oil, while four spring force mold fixing means 3 for the fixed mold 5 are connected.
Each oil port 13c in the above is a hydraulic hose (not shown) and a hydraulic pipe 18 that allow movement of the spring force mold fixing means 3.
Is connected to a switching valve 20 that switches between supplying pressure oil and stopping the pressure oil. Switching valve 19/20
Is connected to one hydraulic pressure generating device 21 that generates pressure oil. The switching valves 19 and 20 and the hydraulic pressure generating device 21 constitute a hydraulic device. The hydraulic pressure generator 21 may be of any type such as an air drive type, a manual type, or an electric type, and two hydraulic pressure generators 21 are provided instead of the switching valves 19 and 20. Alternatively, the power supply and the air supply to the hydraulic pressure generators 21 may be switched and controlled.

In the above configuration, when pressure oil is supplied to the oil chamber 13b, the piston rod 15 is resisted against the biasing force of the disc springs 16 ...
Is pushed back, and the clamp lever 8 is attached to the washer 1 by its own weight.
It rotates clockwise about the rotation center 1b in FIG. 2 to be in an unclamped state. In this state, the mold 2 (5) is set and the supply of pressure oil is stopped, whereby the disc spring 16
The clamp lever 8 rotates counterclockwise in the figure with the washer portion 11b as the center of rotation by the biasing force of ..., And the mold 2 (5) is fixed in the clamped state. Since such a clamped state is performed by the urging force of the disc springs 16 ..., and no hydraulic pressure is required, the clamped state is always maintained even in the unlikely event of damage to the hydraulic piping.

And, as described above, since the bolt tightening work for fixing the mold becomes unnecessary, the harmful effects caused by this bolt tightening work,
For example, the danger of using a tool such as a spanner is eliminated. Further, the time loss required for tightening the bolts is eliminated, and for example, the time required for fixing the mold by bolt tightening (using eight) and the mold fixing by the spring mold fixing means 3 ... (Using eight). Compared with the time required for
The work that required 0 minutes was reduced to about 2 minutes. further,
Since the tip end of the clamp lever 8 is moved vertically to be clamped, problems such as displacement of the mold can be solved. However, as in this embodiment, the spring force mold fixing means 3 is used.
When a plurality of disc springs 16 are provided, the biasing forces of the disc springs 16 are set to be the same among the four spring force mold fixing means 3 to prevent partial tightening and enable uniform tightening. Therefore, more reliable prevention of displacement can be achieved.

In the present embodiment, the spring force mold fixing means 3 is provided which clamps the mold by the biasing force of the disc springs 16 ... And unclamps the mold by pressure oil. Instead of 3, as shown in FIG. 5, a hydraulic pressure die fixing means 22 for both clamping and unclamping the die with pressure oil may be provided. In this case, the piston portion 15b of the piston rod 15 partitions the interior of the cylinder portion 13 into two chambers, an upper chamber and a lower chamber, which are used as a clamping oil chamber 13a 'and an unclamping oil chamber 13b, respectively.

The oil chamber 13a 'has an oil port 8d, and the oil chamber 13b has an oil port 13d.
c communicate with each other, and pressure oil is supplied from these oil ports 13c and 8d. Further, when pressure oil is supplied to one oil chamber, the other oil chamber is adjusted to communicate with an oil return tank (not shown) to return the oil.

According to such a configuration, since the mold is clamped by the pressure liquid, it is possible to easily obtain a tightening force larger than the tightening force of the disc springs 16 ... Further, since the unclamping is also performed by the pressure liquid, a member such as a spring for pushing back the liquid is unnecessary.

[Effect of device]

As described above, the foam molding machine according to the first aspect of the present invention clamps the mold by the urging force of the spring, and unclamps the mold by the pressure liquid, and a spring force mold fixing means, and this spring. A mounting means for disposing and mounting the force die fixing means at a desired position, and a hydraulic device for generating the pressure liquid and switching supply and stop of the pressure liquid to the spring force die fixing means. This is the configuration provided.

As a result, the danger of using a tool such as a spanner,
It is possible to eliminate the time loss required for tightening the bolts and the problems caused by the displacement of the mold.

The foam molding machine according to the invention of claim 2 is provided with a hydraulic pressure die fixing means for both clamping and unclamping the die with a pressure liquid, instead of the spring force die fixing means. Is.

As a result, it is possible to easily obtain a tightening force larger than the spring force to enhance the reliability of holding the mold, and since the unclamping is also performed by the pressure liquid, a member such as a spring for pushing back the liquid is unnecessary. Has the effect.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a schematic explanatory view of a foam molding machine including a spring force mold fixing means and a hydraulic device. FIG. 2 is a sectional view of the spring force mold fixing means in a clamped state. FIG. 3 is an explanatory view of the foam molding machine. FIG. 4 is a perspective view showing the movable die fixed to the movable die plate. FIG. 5 is a sectional view of the hydraulic pressure die fixing means in the clamped state. FIG. 6 shows a conventional example and is a cross-sectional view showing a mold fixing means in a clamped state. 2 is a moving side mold, 3 is a spring force mold fixing means, 5 is a fixed side mold, 6 is a tap hole (mounting means), 8 is a clamp lever, 10 is a lifting spring, 11 is a height adjusting nut, 1
3 is a cylinder part, 15 is a piston rod, 16 is a disc spring, 19 and 20 are switching valves (hydraulic devices), 21 is a hydraulic pressure generating device (hydraulic mounting), and 22 is a hydraulic pressure die fixing means.

Claims (2)

[Scope of utility model registration request] 1. A spring-forced mold fixing means for clamping a mold by a biasing force of a spring while unclamping the mold with a pressure liquid, and for mounting and mounting the spring-forced mold fixing means at a desired position. And a hydraulic device for switching the supply and stop of the supply of the pressure liquid to the spring force mold fixing means and the generation of the pressure liquid. 2. The foam molding machine according to claim 1,
A foam molding machine equipped with a liquid pressure mold fixing means for clamping and unclamping the mold with a pressure liquid instead of the spring force mold fixing means.