TW201726351A - In-mold decoration mold and method of in-mold decoration - Google Patents

Abstract

An in-mold decoration mold and method of in-mold decoration comprising a first die and a second die is disclosed. The second die has a second surface including a second engagement section and s second formation section. The second engagement section encircles the second formation section. The second die further includes a first air extracting groove and a second air extracting groove. The first air extracting groove communicates with the second engagement section such that a first air extracting hole is formed at the second engagement section. The second air extracting groove communicates with the second formation section such that a second air extracting hole is formed at the second formation section. By such arrangement, the two air extracting grooves can solve the problem that a film is unable to uniformly cover the surface of the mold.

Description

In-mold transfer mold

The present invention relates to an in-mold transfer mold, and more particularly to an in-mold transfer mold which is passed through a vacuum compressor to make the film more conformable to the surface of the mold.

In general, common household items such as mobile phone cases, tablet computers, automotive interior parts, or decorative plastic shells on the surface, mostly use the in-mold transfer (IMR) method to transfer the ink on the surface of the film to the plastic. The surface of the shell or thin container for labeling or decoration purposes. In the in-mold transfer mold method, the film having the ink is placed in a master mold, and one side of the film is closely attached to the inner surface of the master mold, and the master mold and the film are oriented toward the shape. a male mold corresponding to the female mold is moved so that the film is pressed against the male mold on the other side, and the male mold and the female mold are combined with each other to form a material space therebetween, wherein the thin mold has ink One side faces away from the master mold and faces the container space. Subsequently, plastic is injected into the container space by injection molding and the plastic is cured, whereby the ink on the film is firmly formed on the surface of the finished product of the plastic.

In detail, referring to Fig. 1, a conventional in-mold transfer system 8 is disclosed. The in-mold transfer system 8 includes an in-mold transfer mold 9, a first feeding device 81, a mold driving device 82, and a second feeding device 83. The in-mold transfer mold 9 is passed through a transfer film F, wherein one side surface of the transfer mold F has ink; the first feeding device 81 can control the film F relative to the in-mold transfer The mold 9 is moved; the mold driving device 82 is attached to the inner surface of the mother mold 91, and the film F has the side surface of the ink facing away from the mother mold 91, and drives the in-mold transfer. The female mold 91 of the mold 9 and the male mold 92 are engaged to the female mold 91. A material space 93 is formed between the male molds 92 and the second feeding device 83. The second feeding device 83 injects plastic into the material space 93 to fill the film F and the male mold 92, so that the surface has the film F. The finished product of the ink.

Referring to FIG. 2a, in the process of fabricating the finished product using the above-described in-mold transfer system 8, the mold driving device is formed before the master mold 91 and the male mold 92 are joined to form the container space 93. The 82 system actuates an air extraction passage 911 of the female mold 91 for pumping so that the film F can closely conform to the surface of the female mold 91. In detail, the female mold 91 has a material inner wall 912 and a fitting inner wall 913, wherein the material inner wall 912 is for the side forming the material space 93, and the fitting inner wall 913 is The male mold 92 is pressed against each other to close the material space 93, and the air suction passage 911 communicates with the fitting inner wall 913. In addition, the other end of the air suction passage 911 is connected to a vacuum compressor through a suction groove to achieve the purpose of suction. Referring to FIG. 2b, after the mold driving device 82 closely conforms the film F to the surface of the mother mold 91, the mold driving device 82 then drives the in-mold transfer mold 9 to actuate the female mold. The fitting inner wall 913 of 91 presses the male mold 92 and performs a subsequent injection molding step.

However, when the gas is taken out by the suction passage 911 and the film F is fitted to the surface of the female mold 91, since the suction passage 911 is disposed outside the container space 93, the inner wall of the material is The bent position within 912 tends to create a condition in which film F and inner wall 912 of the container are not completely affixed. At this time, once the male mold 92 is engaged with the female mold 91 to fix the position of the film F, the film F may be injected into the material space 93 due to high pressure and plastic pushing during plastic injection. As a result, the ink on the film F is cracked or even broken, and the pattern on the finished product after curing is also cracked, deformed, or damaged.

Therefore, the above-described in-mold transfer mold method should be improved to avoid the situation that the film cannot be uniformly and closely applied to the surface of the mold during the manufacturing process.

The invention provides an in-mold transfer mold, which is separately driven by a plurality of suction grooves. Vacuum suction or reinforced adsorption for specific areas to reduce the failure rate of the finished product and further improve work efficiency.

The in-mold transfer mold of the present invention comprises: a first mold having a first surface, the first surface being provided with a first joint section and a first contour section, the first joint section surrounding the a first configuration section; a second mold having a second surface, the second surface being provided with a second engagement section and a second configuration section, the second engagement section surrounding the second structure a second engagement section for splicing with the first engagement section of the first mold, the second configuration section being for opposing the first configuration section of the first mold The first forming section and the second forming section together form a receiving space; wherein the second mold further has a first suction groove and a second suction groove, the first suction groove Connecting the second joint section to form a first air venting hole in the second jointing section, the second air venting groove connecting the second configuring section to form a first forming section Two suction holes.

The second air vent is adjacent to a boundary between the second joint section and the second configuration section. Thereby, the adsorption can be enhanced for the bend of the mold to achieve the effect of completely and evenly conforming the thin film of the film to the second surface.

Wherein the second air vent is adjacent to the bend of the second configurable section. Thereby, the air in the vicinity of the bending position is extracted to achieve a completely and uniform bonding effect between the film material and the second surface.

Wherein, the cross-sectional shape of the second air vent is circular, and the circular aperture has a diameter of 0.01 to 0.05 millimeters (mm). This enhances the adsorption at any narrow edge of the mold and avoids affecting the appearance of the finished product, thereby improving the convenience of use.

The cross-sectional shape of the second air vent is an elongated shape, and the width of the elongated shape is 0.01 to 0.05 millimeters (mm). This enhances the adsorption at any narrow edge of the mold and avoids affecting the appearance of the finished product, thereby improving the convenience of use.

The mold device of the present invention comprises: an in-mold transfer mold, as described above An in-mold transfer mold; a helium unit connected to the first pumping tank and the second pumping tank; a timing control unit electrically connected and controlling the helium gas unit.

The in-mold transfer method of the present invention is carried out using the above-described mold device, which comprises: disposing a film having ink on one side on a second surface of the second mold, and the film has ink One side is facing away from the second film; the timing control unit actuates the first suction groove for pumping, and the film is adhered to the second joint section of the second mold; Actuating the second suction groove for pumping, bonding the film to the second configuration section of the second mold; pressing the first mold against the second mold, and the first mold The joint section and the second joint section of the second mold clamp the film to form the material space between the first configuration section of the first mold and the second configuration section of the second mold a portion of the film in the container space is attached to the second configuration section; a molten plastic is injected into the area of the material space between the film and the first configuration section; And after the plastic is cured to have a finished product having the film on the surface, separating the first mold and the first The finished mold is removed.

Wherein, before the timing control unit actuates the second suction groove for pumping, the first suction groove is first actuated for pumping. Thereby, the effect of closely adhering the film material to the second joint section can be achieved.

Wherein, when the timing control unit starts to actuate the second pumping slot for pumping, the first pumping slot continues to pump air. Thereby, the effect of improving the applicability can be achieved by strengthening the adsorption effect of the second joint section.

Wherein, when the timing control unit starts to actuate the second pumping slot for pumping, the first pumping slot stops pumping. In this way, the pumping can be enhanced for a specific area, thereby improving the convenience of use.

In the in-mold transfer device of the present invention, the second mold is provided with a second suction hole at a bent position of the second configuration region, or a boundary between the second engagement portion and the second configuration portion Wherein, the film material can be more closely adhered to the entire second surface of the second mold. In addition, by using the timing control unit to brake the helium unit, the timing control unit may be configured to perform sub-regional or segmental adsorption on the two suction slots according to the shape of the mold and the molding requirement, or set a specific region. Strong pumping or long pumping time can prevent the finished product from cracking or surface defect during subsequent injection molding, so it can improve the yield of the product and improve the efficiency of in-mold transfer. .

〔this invention〕

1‧‧‧First mould

11‧‧‧ first surface

111‧‧‧First joint section

112‧‧‧First configuration section

2‧‧‧Second mold

21‧‧‧ second surface

211‧‧‧Second joint section

212‧‧‧Second configuration section

22‧‧‧First pumping trough

221‧‧‧First vent

23‧‧‧Second pumping trough

231‧‧‧Second air vent

A‧‧‧film material

S‧‧‧Content space

3‧‧‧汲 gas unit

4‧‧‧Sequence Control Unit

[Use]

8‧‧•In-mold transfer system

81‧‧‧First feeding device

82‧‧‧Mold drive

83‧‧‧Second feeding device

9‧‧·In-mold transfer mold

91‧‧‧Female model

911‧‧‧Pumping channel

912‧‧‧The inner wall of the material

913‧‧‧ affixed to the inner wall

92‧‧‧Male model

93‧‧‧Content space

F‧‧‧film

Figure 1: Conventional in-mold transfer system.

Figure 2a: Schematic diagram of the male and female molds of the conventional in-mold transfer mold before they are joined.

Figure 2b: Schematic diagram of the male and female molds of the conventional in-mold transfer mold after the mating.

Figure 3: A first embodiment of the in-mold transfer mold of the present invention.

Fig. 4 is a view showing the composition of the in-mold transfer mold of the present invention.

Fig. 5 is a partially enlarged view showing a second suction groove of the mold transfer mold of the present invention.

Figure 6: A second embodiment of the in-mold transfer mold of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to FIG. 3, a first embodiment of the in-mold transfer mold of the present invention is illustrated, which includes a first mold 1 and a second mold 2. The shape and size of the second mold 2 can be The first mold 1 corresponds to, after the second mold 2 and the first mold 1 are coupled to each other, a material space S can be formed therebetween.

The first mold 1 has a first surface 11 , and the first surface 11 is provided with a first joint portion 111 and a first configuration portion 112 , the first joint portion 111 surrounds the first configuration portion 112 settings.

The second mold 2 has a second surface 21, and the second surface 21 is provided with a first surface A second engagement section 211 and a second configuration section 212 are disposed around the second configuration section 212. In detail, the second joint section 211 is for pressing with the first joint section 111 of the first mold 1, and the second section section 212 is for the first structure of the first mold 1. The shaped sections 112 are opposite such that the first shaped section 112 and the second shaped section 212 together form the volume space S.

In this embodiment, the second mold 2 further has a first suction groove 22 and a second suction groove 23, and the first suction groove 22 is connected to the second joint portion 211 for the second joint. The section 211 forms a first air venting hole 221, and the second air venting groove 23 is connected to the second configurable section 212 to form a second air venting hole 231. The second air vent 231 is preferably adjacent to or located in a bent position in the second configuration section 212 to extract air near the bending position. Moreover, in combination with the shape of the finished product to be manufactured, the cross-sectional shape of the second air vent 231 may be circular or elongated, wherein the circular aperture or the strip may have a width of 0.01 to 0.05 mm (mm). ), so as not to affect the appearance of the finished product.

Referring to Fig. 3 again, in the in-mold transfer mold of the present invention, a film material A having a surface and an ink device can be prepared in advance. As shown in Fig. 4, the mold apparatus has the above-described in-mold transfer mold, and further includes a xenon unit 3 and a timing control unit 4. The xenon unit 3 is connected to the first suction groove 22 and the second suction groove 23 of the second mold 2 to facilitate the pumping of the two suction grooves 22 and 23 when the operation is performed, and the helium gas unit 3 preferably consists of at least one vacuum compressor. The timing control unit 4 is electrically connected to the xenon unit 3, thereby controlling the pumping time of the first pumping tank 22 and the second pumping tank 23 and the two pumping air through the helium unit 3, respectively. The pumping strength of the grooves 22, 23.

The following is a description of the in-mold transfer method performed by the above-described mold device. First, the film material A having a surface having ink is moved onto the second surface 21 of the second mold 2 such that the surface of the film material A having the ink is located on the second configuration section 212 and faces away from the first The second configuration section 212 is controlled by the timing control unit 4 through the xenon unit 3 The first suction groove 22 and the second suction groove 23 are configured to perform suction. The timing control unit 4 can control the first suction groove 22 and the second suction groove 23 to perform suction simultaneously, or use the two-stage pumping method to make the first suction groove 22 and the The second suction groove 23 operates independently to achieve a better adsorption effect. However, the method in which the timing control unit 4 actuates the xenon unit 3 to evacuate the two suction grooves 22, 23 is not limited to the above.

In the two-stage pumping method, the first pumping tank 22 is first actuated for pumping, and the second pumping tank 22 is not pumped. Since the first suction groove 22 is connected to the second joint portion 211 of the second mold 2, once the first suction groove 22 starts pumping, a suction force is generated in the first suction hole 221, so that the suction The side of the film material A not provided with the ink is closely attached to the second joint section 211 of the second mold 2. After the film material A is adhered to the second joint portion 211, the second suction groove 23 is again actuated to evacuate the film material A and the second configuration section 212 of the second mold 2. When the second suction groove 23 is actuated to perform the pumping, the pumping operation of the first suction groove 22 can be selected or stopped. In detail, referring to FIG. 5 , the second air venting hole 231 formed by the second air venting groove 23 in the second configurable section 212 may be directed to the second configurable section 212 of the second mold 2 . The bent position enhances the adsorption so that the film material A can be more closely and evenly attached to the second configuration section 212 of the second mold 2. In other words, the helium unit 3 is braked by the timing control unit 4 to control the pumping time of the first pumping tank 22 and the second pumping tank 23 and the pumping strength of each of the two pumping slots 22 and 23, respectively. The user can select a specific area for enhanced adsorption, thereby achieving a complete and uniform bonding effect of the film material A and the second surface 21.

According to the above, in the material space S formed by the first mold 1 and the second mold 2, the side of the thin mold material A having the ink is facing away from the second mold 2 toward the capacity. Material space S. At this time, a molten plastic is injected into the area of the material space S between the film material A and the first configuration section 112 by injection molding, since the film material A has been uniformly applied to the first The second shaped section 212 of the second mold 2, so the plastic is injected into the empty space After S, it will be avoided that the bending position of the second configuration section 212 causes plastic pushing to cause the film micro-material A to rupture. After the plastic is cured into a finished product having the ink of the film material A on the surface, the first mold 1 and the second mold 2 are separated to take out the finished product.

In the above embodiment, the second mold is taken as a master mold of the in-film transfer mold. However, as shown in FIG. 6, a second embodiment of the in-mold transfer mold of the present invention is shown, and the first suction groove 22 and the second suction groove 23 are disposed in the in-mold transfer mold. The male model. In detail, the second embodiment is different from the foregoing first embodiment in that the second suction groove 2 connecting the second configuration section 212 is preferably attached to the second engagement section 211 and the The second extraction hole 231 is formed at the boundary of the second configuration section 212. When the in-mold transfer mold of the second embodiment is used, the timing control unit 4 controls the xenon unit 3 so that the side of the film material A not provided with ink is closely attached to the second mold 2 The second joining section 211 is ventilated through the second suction hole 231 so that the film material A adjacent to the boundary between the second joining section 211 and the second forming section 212 can also closely fit the boundary. The location of the bend.

In summary, the in-mold transfer device of the present invention is configured such that the second suction hole 231 is disposed at a bent position of the second configuration section 212 or in the second engagement section 211. The interface with the second configuration section 212 can achieve the effect of making the film material A more closely conform to the entire second surface 21 of the second mold 2; in addition, the timing control unit 4 is used to brake the The helium unit 3 can set the timing control unit 4 to perform sub-regional or segmental adsorption on the two suction slots 22, 23 according to the shape of the mold and the molding requirement, or set a strong pumping or performing for a specific region. The long pumping time can prevent cracks or surface defects of the finished product after the subsequent injection molding, so that the product yield can be improved and the efficiency of the in-mold transfer can be improved.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope protected by the invention, and thus the present invention The scope of protection is subject to the definition of the scope of the patent application attached.

1‧‧‧First mould

11‧‧‧ first surface

111‧‧‧First joint section

112‧‧‧First configuration section

2‧‧‧Second mold

21‧‧‧ second surface

211‧‧‧Second joint section

212‧‧‧Second configuration section

22‧‧‧First pumping trough

221‧‧‧First vent

23‧‧‧Second pumping trough

231‧‧‧Second air vent

A‧‧‧film material

S‧‧‧Content space

Claims (10)

An in-mold transfer mold comprising: a first mold having a first surface, the first surface being provided with a first joint section and a first contour section, the first joint section surrounding the first a configuration section; a second mold having a second surface, the second surface being provided with a second engagement section and a second configuration section, the second engagement section surrounding the second configuration a second engagement section for splicing with the first engagement section of the first mold, the second configuration section being opposite to the first configuration section of the first mold, The first configuration section and the second configuration section together form a receiving space; wherein the second mold further has a first suction groove and a second suction groove, and the first suction groove is connected The second engaging section forms a first air venting hole in the second jointing section, and the second air venting groove is connected to the second forming section to form a second shape in the second forming section Venting holes. The in-mold transfer mold of claim 1, wherein the second suction hole is adjacent to a bending position of the second configuration section. The in-mold transfer mold of claim 1, wherein the second suction hole is adjacent to a boundary between the second engagement section and the second configuration section. The in-mold transfer mold of claim 1, wherein the second suction hole has a circular cross-sectional shape, and the circular aperture has a diameter of 0.01 to 0.05 mm. The in-mold transfer mold according to the first aspect of the invention, wherein the second suction hole has a cross-sectional shape of an elongated shape, and the elongated shape has a width of 0.01 to 0.05 mm. A mold device comprising: an in-mold transfer mold, which is an in-mold transfer mold according to claim 1; a helium unit connected to the first pumping tank and The second pumping tank; a timing control unit, the timing control unit is electrically connected and controlled for the helium unit. An in-mold transfer method is performed using the mold device described in claim 6 of the patent application scope, The in-mold transfer method includes: disposing a film having ink on one side on a second surface of the second mold, and the film has a side of the ink facing away from the second film; Moving the first suction groove to perform suctioning, and bonding the film to the second joint section of the second mold; and the timing control unit actuating the second suction groove to perform pumping, so that the film and the film are a second contoured section of the second mold is fitted; the first mold is pressed against the second mold, and the first joint section of the first mold and the second joint section of the second mold are clamped Forming a material space between the first configuration section of the first mold and the second configuration section of the second mold, the portion of the film located in the material space is attached to the first a two-shaped section; injecting a molten plastic into the area of the material space between the film and the first configuration section; and after the plastic is cured to have a finished product of the film on the surface, separating the The first mold and the second mold are used to take out the finished product. The in-mold transfer method of claim 7, wherein the first pumping tank is actuated to perform pumping before the timing control unit actuates the second pumping tank for pumping. The in-mold transfer method of claim 8, wherein the first pumping tank continues to pump air when the timing control unit starts to actuate the second pumping tank for pumping. The in-mold transfer mold system of claim 8, wherein the first suction groove stops pumping when the timing control unit starts to actuate the second suction groove for pumping.