JPS623206Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a model frame for a resin-type match plate, and specifically relates to a joint structure of a model frame that surrounds the outer periphery of a resin model.

The match plate, which has a model divided into two parts on both sides of the surface plate, is used for the upper mold and the lower mold when turned over during mold making, and is used for the upper mold and the lower mold, respectively, compared to the conventional model where the model part was made of resin. In FIGS. 4 and 5, which show resin-type match plates, a projecting part 2' is provided at the center of the inner circumference of an aluminum alloy model frame 1', and this projecting part 2' allows a resin model 4' It is designed to receive the load acting on it. Therefore, as for the resin model side, the upper and lower flanges 4b', 4b' connected to the overhanging part 2' of the model frame 1' receive loads in the directions facing each other when the model frame 1' is alternately reversed. Therefore, both flanges 4b' and 4b' are required to have sufficient thickness to withstand the load independently, and as a result, the thickness of the plate part of the resin model 4' and the model frame are 1' is necessarily thicker. As a result, the weight of the match plate as a whole increases, making its handling extremely inconvenient.

The present invention was developed in view of the above-mentioned conventional problems, and aims to maintain the strength of the joints of the resin mold matschi plates while reducing their weight by improving the joint structure of the model frame. It is something.

The embodiment shown in FIGS. 1 and 2 embodying the present invention will be described in detail below. As shown in the figure, the aluminum alloy model frame 1 in this embodiment has projecting portions 2 and 3 horizontally protruding from the upper and lower sides of the inner circumferential joint surface that engages with the plate portion 4a of the model 4, respectively. At the same time, both the projecting portions 2 and 3 are formed in a wave shape in the horizontal direction. In addition, the peaks of the upper overhanging portion 2 and the lower overhanging portion 3 are formed in an interlocking shape in the horizontal direction, and both the overhanging portions 2, 3
The inner surface of the ridge portion gradually rises as it reaches the protruding tip, and its wall thickness is such that the top horizontal line of the inner surface does not overlap with the top horizontal line of the inner surface of the opposing ridge portion.

Therefore, when the resin model 4 is molded in the aluminum alloy model frame 1 constructed as described above, the resin model 4 has its plate portion 4
The flange portion 4b of the model frame 1 is joined in such a manner that it is held between the upper and lower overhang portions 2 and 3 of the model frame 1 from above and below. Therefore, the load acting on the flange portion 4b of the resin model 4 is received by the peak portions of the projecting portions 2 and 3 facing the direction in which the load is applied. Therefore, sufficient strength can be obtained by setting the projecting parts 2 and 3 to have the same thickness as the conventional projecting part 2' shown in FIG. On the other hand, regarding resin model 4,
As mentioned above, since the peaks of the projecting parts 2 and 3 of the model frame 1 are arranged in a staggered manner,
The thickness of the flange portion 4b joined to this peak portion can be made thicker than the conventional one while keeping the thickness of the plate portion 4a constant. Here, aluminum alloys generally have greater shear strength than resins when it comes to impact forces, so in order to achieve the same strength, the thickness of the resin must necessarily be greater. . Therefore, compared to the conventional method of making the model frame made of aluminum alloy convex and the resin model frame concave, this alone can contribute to reducing the thickness of the plate portion 4a. is clear, and the second
In the figure, for example, when receiving a downward load, the thickness of the resin can be increased in the β section, so it is strong enough to take the load, and in anticipation of this, the thickness of the resin in the α section is reduced. These factors collectively contribute to reducing the overall thickness of the plate portion 4a as well as the model frame. That is,
According to this embodiment, the strength of the joint can be improved by increasing only the thickness of the flange portion 4b, but the thickness of the flange portion 4b is different from that of the conventional flange portion 4b' shown in FIG. Even if they are set equal, sufficient strength can be obtained, so that the thickness of the plate portion 4a of the resin model 4 and the thickness of the model frame 1 can be reduced, so that the overall weight of the resin match plate can be reduced.

In addition, as mentioned above, the projecting parts 2 and 3 are formed in a wave shape, and the thickness of the peaks of the projecting parts 2 and 3 gradually increases toward the projecting tips, so resin is poured into the model frame 1 and the model is made. When manufacturing the resin model 4, the flange portion 4b of the resin model 4 and the projecting portions 2, 3 of the model frame 1 are joined in a state where they bite into each other in the width direction and length direction, so that shrinkage of the resin is prevented as much as possible. Therefore, it is possible to suppress the occurrence of wobbling between the model frame 1 and the resin model 4.

In this embodiment, the projecting portions 2 and 3 are formed in a wave shape, but they may be changed to other shapes, such as a sawtooth shape.

As described in detail above, the present invention provides continuous uneven overhangs on the upper and lower sides of the inner circumferential joint surface of the model frame, as well as the upper and lower overhangs. By forming the convex portion in the horizontal direction in a wedge-shaped manner, it is possible to reduce the thickness of the model frame and the plate part of the model while maintaining the strength of the joint between the model frame and the resin model. The overall weight of the resin-type match plate is reduced, making it extremely convenient to handle, and it also contributes to reducing the material costs for manufacturing.It also suppresses shrinkage of the resin, making it easier to handle the model frame and resin model. It is possible to prevent rattling.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an exploded perspective view showing the main parts of the invention, and Fig. 4 is a conventional A plan view showing a resin type match plate, Figure 5 is B- in Figure 4.
It is a sectional view taken along the B line. 1... Model frame, 2, 3... Overhang, 4...
Resin model.

Claims (1)

[Scope of utility model registration request] A rectangular aluminum model frame for enclosing the outer periphery of a resin model, which has concave and convex shapes that are continuous on the upper and lower sides of the entire outer periphery of the resin model and the entire inner peripheral surface to be joined. In addition to providing
The upper overhanging part 2 and the lower overhanging part 3 are horizontally formed into a wedge shape, and the thickness of both overhanging parts 2 and 3 is gradually raised on the inner surface side as it reaches the tip. A model frame for a resin-type match plate characterized by having a thickness such that horizontal lines on the top surfaces of the frames do not overlap with each other.