JPH0310030Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention is applicable to expanded polystyrene, expanded polyethylene,
The present invention relates to a raw material filling machine and a flange for attaching an extrusion pin for releasing a molded product, which are used when attached to a molding die in the molding of foamable thermoplastic granular foamed resin such as foamed polypropylene.

(Prior Art) Foamed resin molding of foamed polystyrene, foamed polyethylene, foamed polypropylene, etc. is usually performed using a male mold A consisting of a convex back plate 11, a convex mold frame 12, and a convex mold 13, as shown in FIG. A mold consisting of a female mold B consisting of a concave back plate 17, a concave mold frame 15, and a concave mold 16 is used, and granular foamed resin is filled with compressed air from a raw material filling machine 20 into the hollow space 22. A filling process in which steam is blown into the convex steam chamber 14 and a concave steam chamber 21, followed by a heating process in which steam is heated by introducing steam into the convex steam chamber 14 and the concave steam chamber 21, followed by water cooling, and the male and female molds are opened and the concave steam chamber 21 is heated.
This is accomplished by introducing air into the mold and at the same time mechanically operating the ejection pin 19 to release the product from the concave mold 16.

Then, in the above molding process, the extrusion pin 1
9. The raw material filling machine 20 is commonly used for various molds, and is installed and removed each time the molds are replaced.

Therefore, a mounting flange 18 is generally used, and the tips of the raw material filling machine 20 and the extrusion pin 19 are passed through the concave back plate 17 and flush with the inner wall surface of the concave mold 16, and then screwed into place. Fixed.

By the way, this mounting flange 18 is usually mounted on a pedestal 18a provided with a screw hole 23 as shown in FIG.
It has a structure in which a tightening ring part 18b having a tightening cutout 24 is formed in a protruding part, and this mounting flange 18 can be attached to either the concave back plate 17, the filling machine 20, or the extrusion pin 19. After aligning, the cut portion 24 is tightened and reduced using a handle wrench 25 as shown in FIG. 5, thereby fixing the filling machine and extrusion pin to the mold.

However, in general, it is extremely rare for the mold of a foam resin molding machine to produce only one molded product as shown in Figure 4, and usually the mold plane is about 1 m x 1 m and is molded in large numbers with 6 cavities. .

In this multi-cavity mold, for example, about 4 extrusion pins and 2 filling machines are used for one molded product.Therefore, (4 pins + 2 pins) x 6 pins = 36 pins, and the concave back plate 17 There are many of these on the side, and the filling machine is connected to hoses for supplying raw materials and air, making it extremely difficult and complicated to attach and remove the ejector pins and the filling machine each time the mold is replaced. It is.

In particular, the mounting flange shown in FIG. 5 must be tightened from the lateral direction, making it difficult to reach into the standing state and requiring careful attention and time-consuming work. Ta.

However, in recent years, high-mix, low-volume production has suddenly become a trend in the industry, and mold change time has become a major factor in improving molding operation rates.Therefore, it is equally desirable to develop a highly stable mounting flange suitable for this purpose. It came to this.

(Problems to be solved by the invention) The invention corresponds to the current state of the prior art as described above,
The challenge was to develop a mounting flange that satisfies these demands, and by focusing on workability and having an appropriate direction for inserting a handle wrench, it was possible to easily attach and remove ejector pins and filling machines, and to seal the steam. The object of the present invention is to provide a mounting flange that has good properties, is easy to match with a concave mold, and has high stability.

(Means for Solving the Problems) Therefore, the feature of the mounting flange of the present invention that meets the above purpose is that the flange body is attached to the concave back plate of the mold for molding the foamed resin. and a tightening ring which is integrally disposed on the opposite side of the flange body and has a slit in a part of the peripheral wall and whose inner diameter can be reduced by tightening. A knob bolt was inserted into the peripheral wall near the slit in a radial direction, and the tapered part was brought into contact with the head of the knob bolt, so that the taper bolt was screwed into the flange body so as to be movable in the insertion direction of the filling machine and ejector pin. It's in the structure of things.

(Function) Therefore, according to the above configuration, when attaching the filling machine and the extrusion pin to the mold, first, the entire mounting flange is attached to the mold. Then, insert the extrusion pin or filling machine and align it with the inner wall surface of the mold. Then, use a tool such as a T-shaped hex handle wrench to rotate the taper bolt, and the taper bolt will be screwed in. The knob bolt that is in contact with it is pushed, narrowing the slit width of the tightening ring and reducing its inner diameter, so that it is fixed to the mold.

In this way, the ejector pin and the filling machine can be easily attached and removed without having to put one's hand between the filling machine, the ejector pin, and the hose that are standing in a row.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2 show an example of the mounting flange according to the present invention, in which 1 is the flange body;
Reference numeral 2 denotes a tightening ring arranged on one side of the flange body, and the flange body 1 has an extrusion pin, a back plate mounting hole 7 for attaching to the concave back plate 17 outside the through hole of the filling machine, and O for sealing. A gasket groove for fitting the ring 6, and a tap 2 for setting the insert for center alignment with the tightening ring 2.
Taps for inserting the tapered and tapered bolts 3 are provided, respectively.

On the other hand, the tightening ring 2 extends integrally with the flange main body 1 or is laminated as a separate body, and although it has a hexagonal outer shape in the figure, it may have a circular shape or other suitable shape. It can be any shape,
However, a hexagonal shape is preferable to prevent loosening, and as mentioned above, this includes an extrusion pin, outside the through hole of the filling machine, two holes for the set screw 4, a tap for the knob bolt 5, and a tap for easy tightening. A slit 8 is provided for this purpose.

Therefore, in the above configuration, the insertion direction and arrangement of the knob bolt 5 and the taper bolt 3 are important elements in the present invention.The taper bolt 3 has the same structure as a commercially available bolt, but the head part is , is machined into a taper of 14° to 45°, preferably around 30°, and this tapered part is the knob bolt 5.
It is placed so that it comes into contact with the head of the person.

Note that the taper bolt 3 is attached to the flange body 1.
On the other hand, the knob bolts 5 are inserted into the taps of the tightening ring 2 and maintain contact with each other. That is, the ejector pin 19 is inserted into the ring circumferential wall in a direction perpendicular to the direction of insertion of the filling machine 20, while the taper bolt 3 abuts its tapered portion on the head of the knob bolt 5, and the ejector pin 19, etc. It is inserted into the tap facing the direction of insertion. Therefore, the insertion directions of the knob bolt 5 and the taper bolt 3 are in directions that intersect with each other.

Therefore, when attaching the extrusion pin and the filling machine to the mold using the above-mentioned mounting flange, it is necessary to attach the flange to the concave back plate 17 of the conventionally commonly used device shown in FIG. The entire flange is attached to the mold in advance using bolts 9. Of course, the mounting flange is filled with a filling machine in advance,
It is also possible to attach it to the extrusion pin side, which is one of the ways in which the flange of the present invention is used.
Here, the entire flange is attached to the mold in advance.

Thus, in the above state, the ejector pin 1
9. Insert the filling machine 20 through each through hole of the mounting flange, and align its tip so that it is flush with the inner wall surface of the concave mold 16.

Then, as shown in FIG. 3, when the T-shaped hexagonal handle wrench 10 is used to rotate the taper bolt 3, the taper bolt 3 is screwed into the tap, and the knob bolt 5 in contact with it is screwed in. Push the head in the direction of the arrow in Figure 1, narrow the slit 8 of the tightening ring 2, and reduce its inner diameter.
The extrusion pin 19 and the filling machine 20 are tightened and fixed to the mold without moving in the axial direction.

Note that even when the tightening ring is tightened for a long period of time, the slit portion can easily return to its original state by using spring steel.

(Effect of the invention) As described above, the present invention is composed of a flange body and a tightening ring, the taper bolt and the knob bolt are arranged in contact with each other, the knob bolt is arranged in the radial direction of the tightening ring, and the taper bolt is pushed out on the other hand. The slit width of the tightening ring is changed by inserting the pin in the insertion direction of the filling machine and rotating the taper bolt, making it easier to fix to the mold. It has various advantages such as:

(1) By using a T-shaped hexagonal handle wrench when installing and removing the ejector pins and filling machine, the work can be easily done without having to touch them while they are standing.

(2) With the taper bolt, the rotational torque of the T-shaped hexagonal handle wrench becomes a tightening force through the knob bolt, allowing for strong tightening.

Moreover, when the taper bolt is tightened, it receives a variable load in the axial direction, and this force prevents it from loosening after tightening.

(3) Since there is no need for manual intervention as described above, the height of the flange can be designed as low as 20 mm or less, expanding the range of effective use of the extrusion pin and filling machine.

(4) When tightening, no axial force is applied.
Since everything is tightening force, it is possible to insert the extrusion pin and filling machine, align it with the concave mold, and then tighten it as is, making the alignment easy.

(5) From the above points, install the ejector pin and filling machine,
Removal work time is reduced to about 1/3 of the conventional time, and the operating rate of the molding machine is greatly improved.

Furthermore, since it is easy to tighten and align the extrusion pins and the filling machine, unevenness does not occur in that part of the molded product, which improves the appearance of the molded product and contributes to improved quality.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the mounting flange according to the present invention, and Fig. 2 is a diagram showing the state in which the flange is installed.
The left half is shown in cross section. Figure 3 is a perspective view of how the mounting flange is tightened, Figure 4 is a schematic sectional view of how the extrusion pin and filling machine are attached to the mold in foam resin molding, and Figure 5 is the conventional mounting flange tightened. FIG. 1...Flange body, 2...Tightening ring, 3...
... Taper bolt, 4 ... Set screw, 5 ... Knob bolt, 6 ... Seal O-ring, 7 ... Back plate mounting hole, 8 ... Slit, 13 ... Convex mold, 16 ...
...concave mold, 17...concave back plate, 19...extrusion pin, 20...raw material filling machine.

Claims (1)

[Claims for Utility Model Registration] 1. Having a through hole through which the extrusion pin and raw material filling machine pass, and which is continuous with the through hole on the side opposite to the back plate contact side of the flange main body, which has a mold back plate mounting hole. A tightening ring having a through hole and a slit formed in a part of its circumferential wall is layered, and a knob bolt is inserted into the circumferential wall of the tightening ring in the vicinity of the slit in the radial direction of the ring, and the head of the knob bolt is inserted. An extrusion pin and filling in a mold for molding a granular foamed resin, characterized in that the taper bolt is screwed onto the flange body so that the taper part is in contact with the filling machine and the extrusion pin can be moved in the loading/unloading direction of the filling machine. Machine mounting flange. 2. A flange for mounting an extrusion pin and a filling machine in a mold for molding granular foamed resin according to claim 1, wherein the tightening ring is a ring having a hexagonal or circular outer shape.