JPS6312978Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a structure for attaching an injection head to a reaction injection mold.

[Prior art]

Figure 3 is a diagram showing an example of an injection head mounting structure for a conventional reaction injection mold, and in the figure, reference numeral 1
2 is an upper mold, 2 is a lower mold, and 3 is an injection head consisting of a nozzle part 3a and a boss attachment 3b arranged around the nozzle part 3a. By fixing to the upper mold 1 via bolts 4, the injection head 3 is attached and fixed to the upper mold 1.

However, in such a conventional injection head mounting structure, the workability of attaching and detaching the injection head during mold setup (exchange) is poor, and the work takes a long time. There was a problem that multiple type injection was not possible.

[Purpose of invention]

The purpose of this invention was made in view of the above-mentioned problems, and it facilitates the work of attaching and detaching the injection head during mold setup, greatly shortening the work time, and thereby making it possible to increase the number of injection heads in one injection head. An object of the present invention is to provide a structure for mounting an injection head to a reaction injection mold, which enables mold injection.

[Structure of the idea]

In order to achieve this purpose, the present invention
A pedestal attached to the mold and having a threaded portion on its outer periphery, and a cap-shaped base that is attached to an injection head and can be capped on the pedestal, and has a threaded portion of the pedestal on its inner periphery. The injection head is fixed to the mold by screwing the threaded part of the cap attaching to the threaded part of the pedestal. It is something.

Hereinafter, details of the present invention will be explained using examples shown in the drawings.

[Example of idea]

FIG. 1 is a sectional view showing an embodiment of the injection head mounting structure for a reaction injection mold according to the present invention, and FIG. 2 is an exploded perspective view of the same injection head mounting structure. In these figures, numeral 5 is the lower mold, 6 is the upper mold,
A lower end flange portion 8a of a pedestal 8 is attached and fixed to this upper mold 6 via bolts 7. This pedestal 8 has a male threaded portion 8b on its outer periphery, and a fitting hole 8c formed in its center so that the lower end 10a of the boss attachment 10 of the injection head 9 can fit therein. The hole wall surface of this fitting hole 8c is a tapered wall surface such that the hole diameter gradually becomes smaller toward the bottom. Further, the boss attachment 10 is arranged outside the nozzle part 11;
A cap-shaped cap attachment 12 is fixed to the pedestal 8, and the cap attachment 12 has a screw threaded on its inner peripheral surface corresponding to the male threaded portion 8b of the pedestal 8. A mating female threaded portion 12a is provided. Further, a lever 13 is attached to the outer periphery of the cap attach 12.

Further, the lower end portion 10a of the boss attachment 10
is formed in a tapered shape so that its outer diameter gradually decreases downward, corresponding to the tapered hole wall surface of the fitting hole 8c, and the lower end 10a of this boss attachment 10 is connected to the pedestal. Fitting hole 8
c, the hole wall surface of the fitting hole 8c and the outer circumferential surface of the lower end 10a of the boss attachment 10 are in close contact with each other, ensuring sealing performance at this contact surface.

Furthermore, a male threaded portion 8b provided on the pedestal 8
Notches 8d are located at opposing positions in the circumferential direction.
On the other hand, although it is not clear from the figure, the female threaded portion 12a of the cap attachment 12 is provided so as to face the notch 8d in the circumferential direction. ing.
Therefore, when attaching the cap attach 12 to the pedestal 8, first align the female threaded portion 12a of the cap attach 12 with the notch 8d of the male threaded portion 8b of the pedestal 8, and then attach the cap attach 12 to the position shown in FIG. downward (direction of arrow A)
By this, the cap attache 12 can be moved to a position where it comes into contact with the lower end flange portion 8a of the base 8. After this, if the cap attach 12 is rotated approximately 90 degrees by rotating the lever 13 in the horizontal direction as shown by arrow B,
As a result, the female threaded portion 1 of the cap attachment 12
2a is screwed into the male threaded portion 8b of the base 8, and as a result, the attachment of the injection head 9 to the upper mold 6 is completed. As described above, the structure of this embodiment has the effect that the time required for attaching and detaching the injection head during mold setup can be significantly reduced.

[Effect of idea]

As explained above, according to the injection head mounting structure for a reaction injection mold according to the present invention, there is a pedestal that is attached to the mold and has a threaded portion on the outer periphery, and a pedestal that is attached to the injection head and is attached to the pedestal. It is formed into a cap shape so that it can be covered with a cap, and is provided with a threaded part on its inner periphery that corresponds to the threaded part of the pedestal and is threadedly engaged with the threaded part of the base, and the threaded part of the cap attach The injection head is fixed to the mold by screwing it into the threaded part of the pedestal, which greatly reduces the time required to attach and remove the injection head during mold setup. According to
This has the excellent effect of being able to perform injection into multiple molds with one head.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the injection head mounting structure for a reaction injection mold according to the present invention, Fig. 2 is an exploded perspective view of the injection head mounting structure, and Fig. 3 is a conventional reaction injection molding. FIG. 3 is a cross-sectional view showing an example of a structure for attaching an injection head to a mold. 6...Upper mold, 8...Pedestal, 8b...Male thread part,
8c... Fitting hole, 8d... Notch, 9... Injection head, 10... Boss attachment, 10a... Lower end, 11... Nozzle part, 12... Cap attachment, 12a... Female threaded part.

Claims (1)

[Claims for Utility Model Registration] (1) A pedestal that is attached to a mold and has a threaded portion on its outer periphery, and a cap that is attached to an injection head and is formed in a cap shape so that it can be covered with the pedestal. The inner circumferential portion thereof is provided with a cap attach which is provided with a threaded portion that corresponds to and engages with the threaded portion of the pedestal. A structure for attaching an injection head to a reaction injection mold, characterized in that the injection head is fixed to the mold using a mold. (2) The outer peripheral surface of the lower end of the boss attachment of the injection head and the wall surface of the fitting hole of the pedestal into which the lower end of the boss attachment is fitted are each formed in a tapered shape. Injection head mounting structure for reaction injection molding mold.