JPH0239976B2 - TASHOKUSEIKEIWATSUPENNOSEIHO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multicolor molded patch pen.

Conventionally, watz pens are manufactured by welding multicolored synthetic resin pieces in the shape of letters, figures, etc. to a backing material as follows.

(1) Molding a piece of synthetic resin as a part in a mold for each different color, (2) Place the piece of synthetic resin as the part into the cavity of the mold that imitates the entire character or figure, etc. (3) A backing material was applied to the mold surface and heated and bonded using high-frequency heat.

As mentioned above, according to the conventional method, multiple molds are required, including a mold for molding a synthetic resin piece as a part for each different color, and a mold for inserting and heat-welding each synthetic resin piece. However, the drawback was that the mold cost was high.

Furthermore, when inserting a synthetic resin piece into the cavity of a mold for heat welding, it is extremely difficult to insert the synthetic resin piece evenly and closely to the inner surface of the cavity. Air enters between the synthetic resin piece and the inner surface, causing the synthetic resin piece to wave, so when high-frequency welding is performed, the synthetic resin piece does not come into close contact with the backing material, resulting in poor welding between the synthetic resin piece and the backing material.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and to provide a method for manufacturing a multi-colored emblem pen that does not require a plurality of full dies and has good weldability to the backing material.

The basic structure of the present invention has a cavity shaped like an entire character, figure, etc. Using one mold, fill all cavities of the mold with the synthetic resin raw material of the first color and mold a synthetic resin piece,
Next, take out the synthetic resin piece from the cavity in which the synthetic resin piece of a different color from the synthetic resin piece is to be formed, and fill the cavity with a synthetic resin raw material of a different color from the synthetic resin piece to form the synthetic resin piece. After molding and repeating this operation as necessary, after all the synthetic resin pieces are formed, a backing material made of cloth, synthetic resin sheet, etc. is applied to the mold surface and the synthetic resin pieces and the backing material are welded by high frequency. It is configured like this.

Embodiments of the present invention will be described below based on the drawings shown in FIGS. 1 to 4.

The multicolor molded patch pen 1 shown in FIG. 1 includes two circular synthetic resin pieces 3 painted black on the surface of a backing material 2 made of fabric, and a rectangular synthetic resin piece 4 also painted black. It consists of a circular synthetic resin piece 5 displayed in a matte finish, a synthetic resin piece 6 displayed in a satin finish and shaped like characters, and a square synthetic resin piece 7 displayed in a satin finish. and,
The synthetic resin piece 3 and the synthetic resin piece 4 are the same color, and the synthetic resin piece 5, the synthetic resin piece 6, and the synthetic resin piece 7 are the same color.

The mold 8 for molding the synthetic resin pieces 3, 4, 5, 6, and 7 of the wax pen 1 is shown in FIG. A recess) is provided in the upper surface side. The cavity corresponding to synthetic resin piece 3 is 10, the cavity corresponding to synthetic resin piece 4 is 11, and the cavity corresponding to synthetic resin piece 5 is
12 corresponds to the cavity, 13 corresponds to the synthetic resin piece 6, and 14 corresponds to the synthetic resin piece 7. To mold the synthetic resin pieces 3, 4, 5, 6, and 7 using this mold 9, in order to effectively utilize the synthetic resin raw material, the synthetic resin raw material of the color that will be used in the largest amount is Fill all cavities 10, 11, 12, 13, and 14 with. In this example, the synthetic resin pieces 5, 6, and 7 displayed on the satin finish use more synthetic resin raw material, so the synthetic resin raw materials are used in cavities 10, 11, and 7.
12, 13, and 14, the mold 8 was inserted into a heating furnace maintained at the melting temperature of the synthetic resin raw material, the synthetic resin raw material was melted in the heating furnace, and the synthetic resin raw material was held in the heating furnace for a predetermined period of time. Afterwards, the mold 8 is taken out and cooled. Next, the synthetic resin pieces 3 and 4 are painted black.
The synthetic resin pieces molded in the cavities 10, 11 where the molding is to be carried out are taken out from the cavities 10, 11, and the cavities 10, 11 are filled with synthetic resin raw materials for the synthetic resin pieces 3, 4 shown in black. The mold 8 is inserted into the heating furnace, the synthetic resin raw material is melted in the heating furnace, and after being held in the heating furnace for a predetermined time, the mold 8 is taken out and cooled sufficiently.

The backing material 2 is spread over the lower electrode 21 of the high-frequency welder 20, as shown in FIG. Place the upper electrode 22 and the lower electrode 21
While pressing the mold 8 and the backing material 2 with
By applying a high frequency voltage to the electrodes 21 and 22, the synthetic resin pieces 3, 4, 5, 6, and 7 are welded to the surface of the backing material 2. Synthetic resin pieces 3, 4, 5, 6,
7 are cavities 10, 11, 1 of mold 8.
2, 13, and 14, the contact surface on the backing material 2 side melts slightly, penetrates into the backing material 2, and is welded.

In the above example, the case is explained in which the pieces are made of synthetic resin pieces of two colors, but it can also be carried out in the same way when the pieces are made of synthetic resin pieces of three or more colors, and after the first synthetic resin piece is molded, the second Take out the synthetic resin piece from the cavity into which the synthetic resin piece is to be molded, and
It is sufficient to mold the first synthetic resin piece, then take out the first synthetic resin piece from the cavity in which the third synthetic resin piece is to be molded, and mold the third synthetic resin piece.

The upper surface of the mold 8 and the inside of each cavity may be thinly coated with a fluorocarbon resin (polytetrafluoroethylene resin, etc.) to make it easier to take out the molded synthetic resin piece from the cavity.

The synthetic resin raw material is mainly vinyl chloride, and a blowing agent is mixed into the synthetic resin raw material.

The lining material 2 may be a synthetic resin sheet in addition to cloth.

If the synthetic resin piece in the cavity of the mold 8 is molded to be recessed from the surface of the mold 8 as shown in FIG. Even if welding is performed, the synthetic resin piece is not sufficiently welded to the backing material 2, and it becomes easy to peel off after repeated washing. Therefore, as shown in FIG. 7, an elastic cushion material 23 such as non-woven fabric is placed on the lower electrode 21.
Lay the lining material 2 on the cushion material 23,
It is preferable to place a mold 8 on the backing material 2 and perform high frequency welding. The cushion material 23 may be a silicone sheet with a thickness of about 1 to 3 mm. By high-frequency welding as described above, the cushion material 2
3 pushes the backing material 2 into the cavity and improves the adhesion between the synthetic resin piece and the backing material 2. The cushion material 23 is coated with adhesive on the side facing the backing material 2, and when high frequency welding is performed, the backing material 2
It may also be glued to.

Since the present invention has the above configuration, it has the following advantages.

(1) All synthetic resin pieces can be molded with one mold without the need for multiple molds, which helps reduce costs.

(2) Since the molded synthetic resin pieces are high-frequency welded, air will not enter the cavity and no welding defects will occur between the synthetic resin pieces and the backing material.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a wax pen obtained by implementing the present invention, Fig. 2 is a perspective view of a mold, Fig. 3 is a perspective view showing the molding state, Fig. 4 is a sectional view showing the welding method, and Fig. 5 The figure is an enlarged sectional view of the main part of Figure 4,
The figure is a cross-sectional view of a synthetic resin piece with a concave surface, and FIG. 7 is a cross-sectional view showing a method of welding the synthetic resin piece with a concave surface. 1... Watu pen, 2... Lining material, 3, 4,
5, 6, 7...Synthetic resin piece, 8...Mold, 10,
11, 12, 13, 14... Cavity.

Claims (1)

[Claims] 1 Fill the cavity formed in the mold with synthetic resin raw material, mold the synthetic resin piece into the cavity,
Take out the synthetic resin piece from the cavity in which a synthetic resin piece of a different color from that synthetic resin piece is to be molded, fill that cavity with a synthetic resin raw material of a different color from the first synthetic resin piece, and then mold the synthetic resin piece into the cavity. A method for manufacturing a multicolor molded watz pen, which comprises molding a resin piece, applying a backing material to the mold surface, and high-frequency welding the synthetic resin piece.