JPH0543976Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a casting spout device used when injection casting is performed using a metal mold.

(Prior Art) In a conventional injection molding apparatus,
As shown in No. 54907, a feed sleeve and an injection sleeve are connected to the mold in communication with the cavity, molten metal is injected from the feed port of the feed sleeve and flows into the injection sleeve, the feed sleeve is closed with a plunger, and then the molten metal is pushed into the cavity by the plunger in the injection sleeve.

(Problem to be solved by the invention) The above-mentioned conventional device requires 2 to 3 steps until the cast product hardens.
During this time, the molten metal tends to cool and solidify near the exposed hot water inlet, which sometimes closes the hot water inlet and makes continuous work impossible.

When this happens, the solidified metal must be removed by melting it with a drilled burner each time, resulting in a significant drop in production efficiency.

(Means for Solving the Problems) The present invention combines a seal sleeve in a cylindrical shape and fits into the hot water supply port to isolate the hot water supply port from the molten metal, so that even if the molten metal solidifies within the seal sleeve, This method facilitates the removal of solidified metal, and the means for this is to provide the base of the casting spout with a hot water supply port and an outlet that open on the outside and communicate with each other, and a seal plunger that opens and closes this outlet on the base. A casting spout device for a mold, which is slidably fitted and connects the base body to the mold by communicating the outlet with the cavity of the mold, and injects molten metal from the hot water supply opening via a hopper. The seal sleeve is divided into a plurality of pieces along the dividing plane in the inflow direction and has a connecting part for the extraction tool on the outer end surface, and is detachably fitted to the inner surface of the hot water supply port so as to cover the inner surface.

(Function) With the above configuration, molten metal does not adhere to the hot water supply port.
Even if solidified within the seal sleeve, the sleeve is divided so that it can be removed one by one.This creates a gap between the solidified metal and the hot water supply port, making it easier to remove the solidified metal.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is a casting mold, 2 is a casting spout, and inside the mold 1 there is a cavity 3 and a runner 4 of the same shape as the product, and an injection sleeve 5 is installed in the runner 4. The injection plunger 6 is connected to the inside of the injection plunger 6.
are slidably fitted to push the molten metal M into the cavity 3.

The pouring port 2 has a vertical hot water supply port 8 in its base body 7.
and a lateral outlet 9, which are open on the outer surface and communicate with each other, and are attached to the mold 1 with the outlet 9 communicating with the runner 4.

A cylindrical seal sleeve 10 divided into two parts in the vertical direction, which is the direction in which the molten metal flows, is fitted to the inner surface of the supply port 8. The seal sleeve 10 has a structure as shown in FIG.
As shown in Fig. 3, it is composed of split pieces 10a and 10b, and has screw holes 11a and 11b on the top surface. These screw holes are used to screw in a removal tool 12 as shown in Fig. 4.

The extracting tool 12 has a cylindrical hammer 14 movably fitted to a stem 13, and a flange 15 that collides with the hammer 14 attached to the upper end of the stem.
5 and the divided pieces to apply an impact force, the divided pieces 10a and 10b are separated from the solidified metal and the base 7, and then extracted.

A seal plunger 16 is inserted into the outlet 9 from the outside.
are slidably fitted to open and close the communication path with the runner 4 of the mold 1, and an outlet pipe 18 of the hopper 17 is inserted into the seal sleeve 10 and connected to the flange 19 (not shown). It is fixed to the base body 7 with bolts.

The casting operation using this device is carried out as follows. First, the seal plunger 16 and the injection plunger 6 are moved back, and molten metal is injected from the hopper 17 and flows into the injection sleeve 5 as shown by M. Next, the seal plunger 16 is moved forward to close the outlet, and when the injection plunger 6 is moved forward, the molten metal M is extruded into the cavity 3 to form the desired cast product, and the upper mold is separated to form the cast product. Take it out.

When repeating such casting work, pouring port 2
cools relatively easily, and the metal may solidify and adhere to the inner surface of the seal sleeve 10, gradually increasing the thickness and reducing the flow path area. In addition, in such a state, solidified metal also adheres to the vicinity of the lower end of the outflow tube 18 of the hopper 17, causing the hopper 17 and the seal sleeve 10
may be combined together.

Therefore, when the hopper 17 is extracted while applying an impact, the extraction tool 12 is screwed onto the divided pieces 10a or 10b of the seal sleeve 10, and the divided pieces are extracted one by one using the above method. Since a space corresponding to the seal sleeve 10 is formed, the solidified metal can be easily taken out.

Furthermore, by using the hopper 20 shown in FIGS. 5 and 6 in place of the hopper 17, the hopper can be easily removed. This hoppa 2
0 consists of half parts 21 and 22 divided in the vertical direction, and each half has flanges 23, 24, 2 on the dividing surface.
5, 26, and flanges 28, 29 near the lower end of the outflow tube 27, which are connected together by a screw 30 and a fixing nut 31, and a screw 32.
It is fixed to the base body 7 by.

This hopper 20 is also used in the same manner as the hopper 17, but even when a large amount of metal is solidified, as shown at 33 in FIG. 6, it can be easily extracted. In such a case, remove the screws 30 and 32 and remove the half 21.
By applying an impact to and 22 individually, it can be separated from the solidified metal and extracted. After extracting the hopper 20, the seal sleeve 10 is extracted using the extraction tool 12 as described above.

Note that as means for extracting the seal sleeve 10, appropriate engaging means and impact force applying means can be used in place of the screw holes 11a, 11b and the extracting tool 12.

(Effects of the invention) As described above, since the inner surface of the hot water supply inlet is covered by the seal sleeve, metal will not adhere to the inner surface and solidify, and even if metal solidifies within the seal sleeve, Since the divided pieces of the seal sleeve can be pulled out one by one with the extraction tool, a space is created around the solidified metal, and the solidified metal can be easily removed.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, Fig. 3 is an oblique view of the seal sleeve, and Fig. 4 is an oblique view showing how the extraction tool is used. , FIG. 5 is a perspective view of an apparatus using a splittable hopper, and FIG. 6 is a sectional view taken along the line -- in FIG. 5. 2... Casting port, 7... Base, 8... Hot water supply port,
9... Outlet, 10... Seal sleeve, 10
a, 10b...divided piece, 16... seal plunger, 17, 20... hopper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The base of the pouring spout is provided with a hot water supply port and an outlet that are open on the outer surface and communicate with each other, and a seal plunger for opening and closing the outlet is slidably fitted to the base. In a casting spout device for a mold, the base body is connected to the mold by communicating the outlet with the cavity of the mold, and the molten metal is injected from the hot water supply port via a hopper, and the parting surface in the direction of inflow of the molten metal. 1. A casting spout device for a mold, characterized in that a sealing sleeve that is divided into a plurality of pieces and having a connecting portion for a extraction tool on the outer end surface is removably fitted to the inner surface of a hot water supply spout so as to cover the inner surface. 2. The casting spout device for a mold according to claim 1, wherein the outer end surface of the sealing sleeve is provided with a screw hole for screwing in a extraction tool.