JPS6176369A - Hot stamping device - Google Patents

Abstract

PURPOSE:To enhance design property and productivity, by a construction wherein a support means is liftably supported by a lower fixed frame, and a pressing body for a film is suspended from an upper fixed frame. CONSTITUTION:The support means 4 for a work 2' is liftably supported by the lower fixed frame 3, and the pressing bodies 19 are suspended from the upper fixed frame 5 by energizing them through elastic members 20 so that they are located below the bottom dead center of a die 11. When the heated die 11 is lowered to the bottom dead center to make contact with an aluminum foil 12, and is pressed against the work 2' for a predetermined period of time, whereby an adhesive at parts of the foil 12 corresponding to characters, figures or the like carved in relief on the die 11 is melted, and only the foil parts in the shape of the predetermined characters, figures or the like are adhered to the work 2'. Then, the die 11 is moved upward away from the foil 12 to be returned to the top dead center, cooling air is simultaneously blown to the foil 12 to rapidly cool the adhesive, thereby solidifying the adhesive, thereafter the work 2' with only the aluminum foil parts fixed thereto is lowered so as to separate the foil parts from the other parts of the foil 12, and is returned to the bottom dead center. Accordingly, since the aluminum foil 12 is rapidly solidified by cooling, the foil is not damaged at the time of separating the work 2' from the unadhered parts of the aluminum foil, and accurate stamping is performed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is a hot stamping device used when attaching letters, figures, etc., such as aluminum foil to acrylic resin workpieces whose surfaces have been hard coated. belongs to the technical field of

In the invention of this application, a receiver for a resin workpiece such as acrylic whose surface has been hard-coated in a predetermined manner is fixed to a lower fixed frame, and a winding device such as a roller is attached to the receiver. A mold made of rubber or the like embossed with characters, figures, etc. is attached to a support body equipped with a heating device such as an electric heater, facing each other with a stretched roll-shaped film made of aluminum or the like interposed therebetween. This invention relates to a hot stamping device in which the support body is supported movably up and down by a hydraulic cylinder or the like fixed to an upper fixed frame, and in particular, the support is supported by a hydraulic cylinder or the like fixed to a lower fixed frame. It is supported to be able to move up and down, and is suspended on the upper fixed frame by being biased downward via an elastic body such as a spring so that the pressing body such as a roller against the film is located below the bottom dead center of the mold. This invention relates to a hot stamping device in which a cooling air outlet is disposed on an upper fixed frame or the like so as to face the workpiece at the top dead center of the holder.

<Prior Art> As is well known, various resin materials have advantages such as lightness, corrosion resistance, and ease of processing, and are therefore widely used in various industries.For example, acrylic resin materials have advantages such as strength, hardness,
It has excellent lightness and is often used as a variety of exterior materials.

For the resin products used as exterior materials mentioned above,
In order to improve its design, characters or
In recent years, instead of pasting a sticker with adhesive on the back side, a film with thermoplastic adhesive on the back side has been recently used. The so-called hot stamping method, in which a mold with characters, figures, etc. embossed on the resin product is pressed and attached while heating, is often used because of its solidity of attachment, good appearance, and high productivity. It has been adopted.

As shown in FIG. 2, the hot stamping apparatus 1 based on the prior art is configured such that, for example, a workpiece 2 coated with acrylic resin is placed in a predetermined position on a holder 4 fixed to a lower fixed frame 3.
The upper base 6 is attached to an upper fixed frame 5 disposed opposite to the lower fixed frame 3 via an air cylinder 7 and an upper guide rod 8.8, and is vertically and vertically suspended. Further, a rubber mold 11 embossed with characters, figures, etc. is fixed opposite to the work 2 on the lower surface of the support 10 which is fixed to the upper base 6 and has a heating device 9 installed therein. has been done.

Then, a roll-shaped aluminum foil 12 as a strip-shaped film with thermoplastic adhesive attached to the workpiece 2 side was wound around a feed-out roller 13 supported by a lower fixed frame 3, and was connected to a motor 14. The mold 11 is wound around a take-up roller 15 and placed slackly between the mold 11 and the workpiece 2 as shown in FIG. 2, and the mold 11 heated by the heating device 9 descends. After contacting the aluminum foil 12, the aluminum foil 12 is further processed and pressed against the workpiece 2 while being heated for a predetermined time, and thermoplastic adhesive is attached to the aluminum foil 12 corresponding to the part embossed on the mold 11. Only the agent is melted and aluminum foil 12 with predetermined characters, figures, etc. is attached to the workpiece 2.

Furthermore, after adhering the aluminum foil 12 to the workpiece 2 as described above, the mold 11 is raised and cooled for a predetermined time to solidify the adhesive interposed between the workpiece 2 and the aluminum foil 12, and the motor 14 is driven. Then, the aluminum foil 12 is wound around the take-up roller 15 to a predetermined length, the workpiece 2 is removed, another workpiece 2 is placed on the receiver 4, and the above-described steps are sequentially repeated.

<Problems to be Solved by the Invention> Therefore, in the above-mentioned conventional hot stamping apparatus, when the workpiece 2 is a normal resin product, the aluminum foil 1 can be pressed without any problem.
However, if the workpiece 2' has been subjected to a predetermined treatment to further harden the surface of the resin material, a so-called hard coat treatment, for example, there is a drawback that the finishing accuracy of the product is reduced.

That is, since the surface of the resin workpiece 2' subjected to the hard coat treatment is hard and extremely smooth, the adhesion between the workpiece 2' and the aluminum foil 12 is extremely poor, making it difficult to stick them together. This has the disadvantage that some of the letters, figures, etc. on the aluminum foil 12 are chipped, resulting in poor appearance and poor design.

Furthermore, although the aluminum foil 12 is stretched over the feed roller 13 and the take-up roller 15, it is not fixed, and the aluminum foil 12 and the workpiece 2' are not in contact with each other. In this case, the aluminum foil 12 first comes into contact with the adjacent mold 11, and then comes into contact with the workpiece 2', but during this time, the aluminum foil 12 shifts, causing the appearance of the letters, figures, etc. to be pasted to be affected. It also has the disadvantage of making things worse.

Furthermore, since the thickness of the aluminum foil 12 and the adhesive attached thereto are both on the order of microns, if the contact time with the heated mold 11 is long as described above, the letters, figures, etc. to be pasted will be damaged. It also has the disadvantage that it causes disturbance in the image, resulting in poor appearance as described above.

Then, the above-mentioned aluminum foil 12 is prevented from shifting, and the mold 11 is
As a measure to shorten the contact time with the aluminum foil 12, a technique has been devised to reduce the clearance between the aluminum foil 12 and the workpiece 2'. A new problem has arisen: contact and damage.

Also, make the aluminum foil 12 into a sheet and place it on the workpiece 2'.
It is also possible to place the sheets one by one, but in that case there is a problem that workability is extremely poor and productivity is reduced.

The purpose of the invention of this application is to solve the problems of hot stamping devices based on the above-mentioned prior art, and to solve the problems of hot stamping devices based on the above-mentioned prior art. It is an object of the present invention to provide an excellent pot stamp device that improves the design of figures and the like, improves productivity, and is useful in the field of design technology application in various manufacturing industries.

<Means/effects for solving the problem> In accordance with the above-mentioned object, the invention of this application, which is summarized in the claims mentioned above, is such that the surface is hard-coated in order to solve the above-mentioned problem. A support for a resin work such as 4 is supported on a lower fixed frame so that it can be freely lowered, and a support that faces the support and is equipped with a heating device is supported on an upper fixed frame so that it can be raised and lowered. , a mold with embossed figures etc. is attached to the lower surface of the support, and a pressing body for the strip film stretched on the winding device and interposed between the support and the mold is attached to the bottom of the support. The film is biased downward via an elastic body so as to be located below the bottom dead center, and is suspended from the upper fixed frame so that the film is set without slack, and the film is placed on the workpiece. When stamping, the above-mentioned holder rises to position the work by bringing it into contact with the film, and then the above-mentioned holder is further raised to the top dead center against the elastic force of the elastic body to securely hold the film. After holding the film firmly, the mold heated by the heating device is lowered to press the film, melting the thermoplastic adhesive attached to the workpiece side of the film, and pasting predetermined characters, figures, etc. on the workpiece. Then, only the mold is raised and separated from the film, and in this case, cooling air is blown onto the film from a cooling air outlet provided facing the workpiece at the top dead center of the holder. This allows the adhesive to rapidly cool and solidify.
After the film with predetermined characters, figures, etc. is firmly attached to the workpiece without chipping, the receiver is lowered together with the workpiece and separated from the film, thereby improving design, finishing viscosity, and productivity. It takes technical measures to improve the performance.

<Embodiment - Configuration> Next, one embodiment of the invention of this application will be described as follows based on FIG. 1. Note that the same parts as those in FIG. 2 will be described with the same reference numerals.

Reference numeral 1' denotes a hot stamping device, and in this embodiment, it is used to attach aluminum foil 12 as a strip-shaped film to predetermined characters, figures, etc. on an acrylic resin workpiece 2' whose surface has been hard-coated. This is how it is done.

Thus, the support 4 for the work 2' is attached to the lower base 1.
6 interposed therebetween, it is supported by a hydraulic cylinder 17 fixed to the lower fixed frame 3 and lower guide rods 18 and 18 so as to be able to move up and down.

Further, a rubber mold 11 embossed with predetermined characters, figures, etc. is placed on the lower surface of a support 10, which is equipped with an electric heater 9 as a heating device, and faces the receiver 4, as in the conventional embodiment. The support body 10 is suspended vertically via the upper base 6 by means of a hydraulic cylinder 7' fixed to the upper fixed frame 5 and an upper guide rod 8.8 so as to be vertically movable.

Furthermore, supports with an abbreviated cross-section are vertically provided on both sides of the upper base 6, and the aluminum ? 51
Rollers 19.19 as pressing bodies for 2 are urged downward via springs 20.20 as elastic bodies and are rotatably suspended. It is disposed so as to be located slightly below the lower surface of the mold 11.

A cold 1.1 unit connected to a compressor (not shown)
1 air piping 21 is appropriately fixed along the inside of the support, and the cooling air outlet 22 at the tip is connected to each of the rollers 1.
It is arranged to be oriented between 9 spaces.

Further, a belt-shaped aluminum foil 12 to which a well-known thermoplastic adhesive is appropriately adhered to the workpiece 2' side is attached to a feed-out roller 1 rotatably supported by an upper fixed frame 5 via a support.
3, the winding roller 15 is rotatably supported by the upper fixed frame 5 via a support, and is connected to the motor 14, in contact with the lower side of each of the rollers 19.
It is wound around and stretched without sagging.

Note that the feed roller 13, the take-up roller 15, and
The motor 14 constitutes a winding device, and also the receiver 4 and the mold 11.
The operation timings and operating times of the lifting and lowering operations, the cooling air blowing operations, and the winding operations of the winding device are controlled by controls (not shown).
+ Automatically controlled via the device.

<Embodiment - Effect> In the above-described configuration, when stamping aluminum foil stamps with predetermined characters, figures, etc. on the workpiece 2', the mold 11 is heated by the electric heater 9, and the mold 11 is heated by the electric heater 9 so that the die 11 reaches its uppermost position as shown by the solid line in FIG. On the other hand, the workpiece 2' is at the bottom dead center as shown by the chain line A in FIG.

Then, the workpiece 2' is raised together with the receiver 4 by the hydraulic cylinder 17 and brought into close contact with the aluminum foil 12, and after positioning the aluminum foil 12 by sandwiching it with each roller 19,
It further rises and reaches top dead center, as shown by the solid line in FIG. 1, and stops.

At this time, the aluminum foil 12 is pressed against the workpiece 2' by each roller 19 through the elastic force of each spring 20, and is securely set without shifting.

Next, the heated mold 11 is lowered together with the support 10 by the hydraulic cylinder 7', and the g! As shown by line B, it reaches the bottom dead center and comes into contact with the aluminum foil 12, and the aluminum foil 12 is pressed against the workpiece 2' for a predetermined time.
The adhesive attached to the portions of the aluminum foil 12 corresponding to the letters, figures, etc. embossed on the workpiece 1 is melted, and only the aluminum foil 12 with the predetermined letters, figures, etc. embossed on the workpiece 2'.

Then, the mold 11 rises and separates from the aluminum foil 12, returns to the top dead center, and cooling air is blown out from the cooling air outlet toward the aluminum foil 12 to rapidly cool and solidify the adhesive. After fixing only the aluminum foil 12 with the predetermined characters, figures, etc. on the workpiece 2', the workpiece 2' is lowered and separated from the other aluminum foils 12, and returns to the bottom dead center.

Note that since the aluminum foil 12 is rapidly cooled and completely solidified as described above, when the workpiece 2' is separated, parts of the aluminum foil attached to the letters, figures, etc. may be chipped, holes may be formed, etc. Accurate stamping of aluminum foil is performed without causing damage.

Furthermore, after that, the motor 14 is driven and the strip-shaped aluminum foil 12 is automatically wound up to a predetermined length around the take-up roller 20, and becomes ready for the next work 2'.

During the above-mentioned winding process of the aluminum foil 12, the aluminum foil 12 is sufficiently separated from the mold 11 and the workpiece 2', so that the aluminum foil 12 is pulled 4! There is no damage caused by the TI shade.

Other Examples> Note that the embodiments of the invention of this application are, of course, not limited to the above-mentioned embodiments; for example, the winding device for the strip film may be supported by the lower fixed frame. The heating device may be a hot water heater or an oil temperature control heater.In addition, if the timing is such that the workpiece reaches the top dead center before the mold reaches the bottom dead center, the lowering of the mold and the top of the workpiece are Various aspects can be adopted, such as allowing the fields to operate simultaneously in parallel.

Furthermore, it is also possible to apply the present invention to hot stamping of resin workpieces that have not been hard coated.

<Effects of the Invention> As described above, according to the invention of this application, the design of hot stamping of characters, figures, etc. on a hard-coated resin workpiece and the finishing accuracy are improved, and the productivity is also improved.
The immersed effect of being economical is Qin.

A support for a workpiece made of surface-hard-coated resin is supported on a lower fixed frame so as to be able to rise and fall freely, and a winding device is installed on the lower surface of the support that faces the support and has a heating device inside. By attaching a mold for the stretched strip film and supporting the support body on the upper fixed frame so as to be able to rise and fall,
When winding up the film, the film does not come into contact with molds, workpieces, etc., and as a result, is not damaged, resulting in an extremely economical effect.

Further, the pressing body for the film is urged downward via an elastic body so that it is located below the bottom dead center of the mold,
By suspending the film from the upper fixed frame, when the workpiece is raised, the film first comes into close contact with the workpiece, and is also pressed and clamped by the workpiece and the support body through the elastic force of the elastic body. After that, until the workpiece is lowered,
It is reliably set without shifting during hot stamping, and as a result, an excellent effect is achieved in that the finishing accuracy of hot stamping is improved.

In addition, since the cooling air outlet is arranged facing the workpiece at the top dead center of the holder, the melted adhesive is rapidly solidified before the film is separated from the workpiece, and then Since the workpiece is separated from the film, defects such as missing parts of predetermined characters, figures, holes, etc. are firmly fixed on the workpiece, improving the design and finishing accuracy. Furthermore, speeding up by rapid cooling also has the advantage of improving productivity.

Therefore, it has been considered extremely difficult to fix the film in the past. l! It is now possible to fix films on tH resin workpieces by hot stamping.
Compared to the conventional method of pasting adhesive-backed stickers, this method has excellent effects in that workability is improved and losses from 1 to 10 are reduced.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of a hot stamping apparatus showing one embodiment of the invention of this application, and FIG. 2 is a front view corresponding to FIG. 1 of a hot stamping apparatus based on the prior art. 3... Lower fixed frame, 2'... Work, 1
3.14.15... Winding device, 12... Film, 11... Mold, 9... Heating device, 10...
Support body, 5... Upper fixed frame,

Claims (2)

[Claims] (1) A support in which a heating device is installed in a mold that faces a holder for a hard-coated resin work fixed on a lower fixed frame with a strip film stretched on a winding device interposed therebetween. In the hot stamping apparatus, the support body is supported by the upper fixed frame so as to be movable up and down, and the support is supported by the lower fixed frame so as to be movable up and down, and the pressing body against the film is at the bottom dead center of the mold. A hot stamping device characterized in that the hot stamping device is suspended from the upper fixed frame while being biased downward via an elastic body so as to be positioned further down. (2) A support in which a mold is equipped with a heating device and is opposed to a holder for a hard-coated resin work fixed to a lower fixed frame with a strip of film stretched over a winding device. In the hot stamping apparatus, the support body is supported by the upper fixed frame so as to be movable up and down, and the support is supported by the lower fixed frame so as to be movable up and down, and the pressing body for the film is moved from the bottom dead center of the mold. It is biased downwardly through an elastic body and suspended from the above-mentioned upper fixed frame so as to be located at a lower position, and the cooling air outlet is arranged so as to face the workpiece at the top dead center of the holder. A hot stamping device featuring: