JPS5811538Y2 - Plastic molding mold - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold for plastic molding, and aims to provide a mold with a simple structure so that the processing position can be easily changed.

In general, in order to ensure that nameplates displaying each model or product number are attached to products with a wide variety of models or product numbers without fail, for example, as shown in Fig. 1.

As shown in Fig. 2, the escutcheon 1 used in the cabinet of a television receiver is provided with a mounting passage 2 as an object to which the nameplate is attached, and a mounting hole 2 is provided in accordance with the model of the above-mentioned receiver. A sorting hole 3 with a different drilling position is provided, and on the other hand, on the back side of the nameplate 4 with the model displayed on the front side, mounting legs 5 that pass through the passage 2 are provided protrudingly. Protrusions 6 at different positions are provided, and the protrusions 6 are fitted into the sorting hole 3 only when the model and the display on the name plate 4 match.

As a result, the name plate 4 can be selected and attached to the escutcheon 1.

Incidentally, objects to be attached such as the above-mentioned escutcheon 1 are often made of plastic molded using a mold.
In this case, as mentioned above, molds for forming the attached body are prepared with different selection holes 3 at different drilling positions to correspond to the different models, which imposes a large cost burden. It was also accompanied by

The present invention eliminates the above-mentioned conventional drawbacks by making a part of the mold movable, and embodiments thereof will be described below with reference to the drawings.

FIGS. 3, 4 and 5 each show a plastic molding die which is an embodiment of the present invention, and FIG. 6 shows an escutcheon molded by the above mold.

In the figure, 7 is a lower mold with a groove 8 formed on its upper surface, 9 is an upper mold main body overlapped with the lower mold 7, and the lower surface facing the lower mold 7 has a columnar part 10 for forming a mounting hole. are protrudingly provided in pairs, and a fitting hole 11 having a circular cross section is penetrated through the center.

Reference numeral 12 is a movable part of the upper mold formed in a cylindrical shape and rotatably fitted into the fitting hole 11, and has a length such that it can reach the upper surface of the lower mold 7 from a position slightly closer to the outer peripheral end of the lower surface of the movable part 12. A protrusion 13 for sorting and large forming protrudes from the top.

14 are grooves each having a semicircular cross section formed at four locations along the outer peripheral surface of the movable part 12 at approximately equal intervals; 15 are grooves having a semicircular cross section along the inner peripheral surface of the fitting hole 11; The groove 15 is formed in the shape of a groove during one rotation of the movable part 12.
are aligned with the groove 14 four times to form a round hole 27 each time.

16 is a locking pin inserted into the round hole 27 and the fitting hole 11
Free rotation of the movable part 12 is stopped.

17 is an escutcheon, 18 is a pair of mounting holes provided on the escutcheon 17, and 19 is a sorting hole also provided on the escutcheon 17.The location of these holes differs depending on the model of the television receiver, and is located on the nameplate where the model is displayed. A protrusion (not shown) is selected and fitted.

To change the position of the sorting hole 19 in a mold having the structure described above, pull out the pin 16 and rotate the movable part 12 until the other groove 14 matches the groove 15 of the main body part 9. After that, the pin 16 is inserted again.

As the movable part 12 is rotated in this way, the protrusion 13 is also moved along the circumference, and as a result, as shown in FIG.
Sorting hole 1 as shown with symbols b, c, and d, respectively.
Escutcheons 17 having different positions of 9 are formed.

Incidentally, if the number of grooves 14 on the movable part 12 side is increased here, it is possible to mold an escutcheon in which the position of the selection hole 19 is further different.

Further, if a suitable means for stopping the free rotation of the movable part 12 is introduced, it is not necessary to provide the above-mentioned groove.

Next, FIG. 7 shows a plastic molding die according to another embodiment of the present invention.

In the figure, 20 is a lower mold with a groove 21 on the upper surface, 22 is a fitting hole formed by penetrating the upper mold main body 23 with a regular hexagonal cross section, and 24 is a regular hexagonal column shaped fitting hole. By refitting the movable part fitted into the hole 23, the position of the protrusion 25 protruding from the lower surface is moved along the circumference.

Reference numeral 26 denotes a columnar portion protruding from the lower surface of the main body portion 23.

The molding functions of the mold having the above-mentioned structure are the same as those of the embodiments shown in FIGS. 3 to 6, and therefore a description thereof will be omitted.

As explained above, the present invention is provided with a fitting hole that passes through the upper mold body, a movable part that can be fitted in different rotational positions in this fitting hole, and a movable part that can be fitted at different rotational positions. Since the protrusion is provided at a position other than the center of the surface facing the upper surface of the mold, it is possible to form a set of attached objects such as escutcheons, which requires changing the drilling position of the selection hole for each model. This can be easily done with a mold, and as a result, there is no need to prepare separate molds for different drilling positions, which is advantageous in terms of cost.

In addition, by shaping the movable part into a perfect circle and rotatably fitting it, it becomes easier to change the position of the protrusion forming the screening hole.

Further, if the movable part is formed in the shape of a regular polygonal column, free rotation is eliminated, and therefore there is no need to take any other means to stop the rotation.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an escutcheon used in a television receiver and a nameplate attached to the escutcheon, FIGS. 2a and b are top and front views of the escutcheon, respectively, and FIG. FIG. 4 is a sectional view taken along the broken line A-A' in FIG. 3;
FIG. 5 is a cross-sectional view taken along the broken line BB' in FIG. 3, and FIGS. 6 a, b, c, and d are top views of the escutcheon molded by the plastic mold, respectively. FIG. 7 is a top view of an escutcheon according to another embodiment of the present invention. 1.17...Escutcheon, 3.19...
... Sorting hole, 9゜23 ... Main body, 12.2
4...Movable part, 13.25...Protrusion.

Claims (3)

[Scope of utility model registration request] (1) A lower mold having a groove formed on its upper surface and an upper mold main body placed over the upper surface of the lower mold are provided, and a fitting hole is inserted through the upper mold main body. A mold for plastic molding, comprising a movable part that can be fitted into the fitting hole at different rotational positions, and a protrusion provided at a position other than the center of a surface facing the upper surface of the lower mold of the movable part. (2) The plastic molding product according to claim 1, wherein the fitting hole is formed in a circular cross section, and the movable part is formed in a cylindrical shape and is rotatably fitted into the fitting hole. Mold. (3) The plastic molding die according to claim 1, wherein the fitting hole is formed in a regular polygonal shape, and the movable part is formed in a regular polygonal shape and is fitted into the fitting hole.