JP2007038621A - Method of preventing formation of sink mark in sealing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein, when a sheet of a photo-curable resin is inserted between synthetic resin plates and cured, sink marks are produced in the level-difference part between the sheet and the synthetic resin plates and that the gradual compression method, a common method for eliminating sink marks, is difficult to carry out because of little margin of compression due to the thinness of the sheet. <P>SOLUTION: The method comprises curing the perimeter and vicinity of the inserted sheet first, instead of curing the photo-curable resin entirely, and then curing the remainder to prevent formation of sink marks in the level-difference part between the sheet and the synthetic resin plates. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to encapsulation with a photo-curing resin.

  Conventionally, when a thin sheet is encapsulated with a light-curing resin between synthetic resin plates, the object is limited. For example, when envy characters with an adhesive on one side are encapsulated, the line width is about 5 mm However, it can only be sealed neatly, and a wide item will sink.

  When a sheet having a large area is inserted between the synthetic resin plates and the photo-curing resin is poured and cured, if it is cured at one time, sink marks are generated around and in the vicinity of the sheet.

  The present invention is directed to a method of curing to prevent this sink.

Means to solve the problem

  Hereinafter, regarding the encapsulation with the photo-curing resin, the synthetic resin plate and the configuration between them will be described. A single sheet of the synthetic resin is bonded, adhered, or closely fixed to the synthetic resin plate. An uncured photocured resin is poured over the sheet surface from above, and another synthetic resin plate is covered thereover. The two synthetic resin plates are synthetic resin plates that do not inhibit curing when irradiated with light for curing the photo-curing resin (hereinafter referred to as acceleration light). (Hereinafter, this form is called a composite plate.)

The composite plate is irradiated with accelerating light from the fixed surface side of the sheet, and the photo-curing resin is cured or cured on the opposite surface during curing. In this way, at least the periphery and the vicinity of the inserted sheet are cured by the first irradiation, or are in the middle of curing, leaving an uncured part at that time, and curing the sheet later to cure the outer periphery of the sheet. A curing method that does not cause sink marks formed in the stepped portion and its vicinity.

  A mask (hereinafter referred to as a mask) is made of a material that can block the accelerating light or a filter that prevents curing. By using this mask, a sheet that can cover only the surface of the sheet inserted between the composite plates is formed. At this time, the size is adjusted so that the accelerating light can be irradiated around and around the sheet. This is arrange | positioned to the surface to which the sheet | seat is fixed, or the surface on the opposite side, and accelerating light is irradiated from the arrange | positioned surface. The photo-curing resin is cured, or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later Curing method that does not cause sink marks that can be formed in the vicinity of the step portion of the outer periphery of the material.

  The sheet surface inserted in the composite plate is covered with the mask. At this time, the size is adjusted so that the periphery and vicinity of the sheet can be irradiated. Both sides are covered with this adjusted mask, and accelerating light is irradiated from both sides or from either side, and the photo-curing resin is cured or cured, and the mask is removed, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later Curing method that does not cause sink marks that can be formed in the vicinity of the step portion of the outer periphery of the material.

  A mask that covers the entire composite plate is formed with the mask. At this time, openings are provided on the surface, the periphery and the vicinity of the sheet loaded in the composite plate so that the accelerating light can be irradiated. This is arrange | positioned to the surface to which the sheet | seat is fixed, or the surface on the opposite side, and a promotion light is irradiated from the surface of the arrange | positioned side. The photo-curing resin is cured or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later Curing method that does not cause sink marks that can be formed in the vicinity of the step portion of the outer periphery of the material.

  A mask that covers the entire composite plate is formed with the mask. At this time, the surface, the periphery, and the vicinity of the sheet loaded in the composite plate are opened so that the accelerating light can be irradiated, and these are arranged on both sides. Accelerating light is radiated from either side or both sides, the photo-curing resin is cured, or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the inserted sheet are cured by the first irradiation of the accelerating light, or in the middle of curing, leaving the uncured part at that time, and by curing later, A curing method that does not cause a step formed on the outer periphery of the sheet and sink marks formed in the vicinity thereof.

  A mask is formed that covers the entire composite plate with the mask. At that time, a slit opened so that the accelerating light can be irradiated only around and in the vicinity of the sheet loaded in the plate is arranged on the surface on which the sheet is fixed or on the opposite side. Irradiate facilitating light from the surface. The photo-curing resin is cured or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later Curing method that does not cause sink marks that can be formed in the vicinity of the step portion of the outer periphery of the material.

  A mask is formed that covers the entire composite plate with the mask. At that time, slits that are opened so that the accelerating light can be irradiated only around and around the sheet loaded in the plate are provided and disposed on both sides. Accelerating light is irradiated from both sides or an arbitrary surface, the photo-curing resin is removed from the mask during curing or curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later Curing method that does not cause sink marks that can be formed in the vicinity of the step portion of the outer periphery of the material.

  In order to irradiate the accelerating light intensively around and around the sheet inserted in the composite plate, an irradiation tool having a shape corresponding to this is prepared, and one side or both sides are irradiated with this. The photo-curing resin is cured, or the irradiation distance is separated during curing, or irradiation is continued at the same distance to cure. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and curing later. A curing method that does not cause a step formed on the outer periphery of the sheet and sink marks formed in the vicinity thereof.

The invention's effect

As described above, by implementing the curing means of the present invention, it is possible to prevent sink marks occurring in and near the stepped portion of the sheet.

The contents of the embodiment and configuration shown in FIGS.

Reference numeral 1 denotes a synthetic resin plate that is adhered, adhered, or closely fixed to the inserted sheet 2. Further, an uncured photo-curing resin 3 is poured over the sheet surface, and another synthetic resin plate 4 is covered thereon.
Reference numeral 7 denotes a composite plate having the above configuration.

  FIG. 1 is a cross-sectional view of an embodiment of 0006, and the first irradiation from the light source B is performed without a light shielding mask. In this case, the inserted sheet does not transmit the accelerating light so much or is effective for non-transparent sheets such as cash cards and photo shop prints. Irradiated and uncured photo-curing resin remains on the sheet surface on the light source A side. For this reason, the condition that does not cause sink marks is satisfied, “at least the periphery and vicinity of the sheet are cured by the first irradiation, or are in the middle of curing, leaving an uncured part at that time and cured later” Yes.

FIG. 2 is an embodiment of 0007, and 5 is a light shielding mask, which covers the sheet portion in such a form that the accelerating light can be irradiated around the loaded sheet 2.
In this case, although it covers from the light source B side, even if it covers from the light source A side, if it is irradiated for the first time from the covered side, the uncured photocurable resin remains on the sheet surface on the light source A side, Satisfy the above-mentioned conditions that do not cause sink marks.

  FIG. 3 shows an embodiment of 0008, in which the sheet 2 is covered from both surfaces by the same light shielding form as 0018 by 5 light shielding masks, and the first promotion light irradiation is performed from both surfaces or any surface. Even in this case, the uncured photo-curing resin remains on the sheet surface on the light source A side, and therefore satisfies the condition that does not cause the above-mentioned sink.

  FIG. 4 shows an embodiment of 0009. The light-shielding mask 5a is opened so that accelerating light can be irradiated on the surface, the periphery, and the vicinity of the sheet 2 loaded. The mask covers the light source A or the light source B side, and the first acceleration light is irradiated from the covered side. Since the uncured photo-curing resin remains in the portion covering the composite plate, the above-mentioned condition that does not cause sink marks is satisfied.

  FIG. 5 shows an embodiment of 0010, in which the sheet 2 is covered from both sides with the same light shielding form as 0020 by the light shielding mask 5a, and the first promotion light irradiation is performed from both sides or either side. In this case, since the uncured photo-curing resin remains at least in the portion covering the composite plate, the condition that does not cause the above-described sink is satisfied, regardless of where the accelerating light is irradiated.

  FIG. 6 shows an embodiment of 0011. The light-shielding mask 5b is opened in a slit shape so that the accelerating light can be irradiated only around and around the inserted sheet 2. When the mask is covered from the light source B side, the first acceleration light is emitted from the light source B. When the mask is covered from the light source A side, the first light is emitted from the light source A. When covering from the light source B side and irradiating from the light source B, the remaining uncured photo-curing resin has a large area and volume, so that a relatively thick sheet can be enclosed by the mask method described above.

  FIG. 7 shows an embodiment of 0012, in which the sheet 2 is covered from both sides with the same light-shielding form as 0022 by a 5b light-shielding mask, and the first promotion light irradiation is performed from both sides or from either side. Even in this case, since the uncured photo-curing resin remains in the covered portion, the above-described condition that does not cause the sink is satisfied.

  FIG. 8 shows an embodiment of 0013. For example, when the two inserted sheets are rectangular, a rectangular instrument is formed in accordance with the outer periphery thereof, and the outer peripheral portion is focused on the light source c side or the light source d with this instrument. After irradiating from the side or both sides, irradiate at a distance or continue irradiation without moving the distance. Even in this case, since the periphery and the vicinity of the sheet are hardened first, the above-described condition for preventing the sink is satisfied.

  Cross section of composite plate and light source   Cross-sectional view of composite plate, figure with mask placed on one side of sheet, and light source   Cross-sectional view of composite plate, figure with mask placed on both sides of sheet part, and light source   Cross-sectional view of the composite plate, and a drawing in which the sheet portion and its surroundings are opened and the other portions are masked and arranged on one side, and a light source   Cross-sectional view of the composite plate, and a diagram in which the sheet portion and its periphery are opened and the other portions are masked, and the light source is disposed on both sides.   Cross-sectional view of the composite plate, and a diagram in which only the periphery and vicinity of the sheet are opened and the other portions are masked, and the light source is arranged on one side   Cross-sectional view of the composite plate, and a drawing in which only the periphery and vicinity of the sheet are opened and the other portions are masked are arranged on both sides, and the light source   The figure which arranged the instrument which can irradiate intensively around the sheet on both sides, and the light source

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin 2 Sheet | seat of inclusion thing 3 Photocuring resin 4 Synthetic resin 5 Mask 5a Mask 5b Mask 6 Opening part (slit)
7 Composite plate

Claims (8)

A sheet to be encapsulated smaller than that is bonded, adhered, or closely fixed to one synthetic resin plate, and uncured photo-curing resin is poured more widely than the sheet surface onto it. Another synthetic resin plate covers it. These two synthetic resin plates are synthetic resin plates that do not inhibit curing when irradiated with light for curing the photo-curing resin (hereinafter referred to as acceleration light). (Hereafter, this form is called a composite plate.)
In this method of irradiating the composite plate with the accelerating light and curing the photo-curing resin, the accelerating light is irradiated from the fixing surface side of the sheet, and the photo-curing resin is cured or in the course of curing, on the side opposite to the fixing surface of the sheet The uncured portion of the surface is irradiated with accelerating light and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the first irradiation, or are in the middle of curing, leaving an uncured part at that time, and curing the sheet later to cure the outer periphery of the sheet A curing method that does not produce sink marks that can be formed in the vicinity of the stepped portion.   A mask (hereinafter referred to as a mask) is made of a material that can block the acceleration light. This mask is used to form a sheet that is covered between the composite plates according to claim 1 so that only the surface can be covered. At this time, the size is adjusted so that the accelerating light can be irradiated around and around the sheet. This is arrange | positioned to the surface to which the sheet | seat is fixed, or the surface on the opposite side, and accelerating light is irradiated from the arrange | positioned surface. The photo-curing resin is cured, or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claim 1 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery, and its vicinity.   Similarly, the mask according to claim 2 covers only the sheet portion loaded in the composite plate according to claim 1 from both sides in a form in which the size is adjusted so that the periphery and vicinity of claim 2 can be irradiated. Then, the irradiating light is irradiated from both sides or from either side, and the photo-curing resin is cured or is cured, and the mask is removed and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claims 1-2 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery, and its vicinity. A mask according to claim 2 is made to cover the entire composite plate according to claim 1. This mask is opened so that the accelerating light can be irradiated on the surface, the periphery, and the vicinity of the sheet loaded in the composite plate. This is arrange | positioned to the surface to which the sheet | seat is fixed, or the surface on the opposite side, and a promotion light is irradiated from the surface of the arrange | positioned side. The photo-curing resin is cured or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claims 1-3 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery, and its vicinity. A mask that covers the entire composite plate of claim 1 is made with the mask of claim 2. At this time, the surface, the periphery, and the vicinity of the sheet loaded in the composite plate are opened so that the accelerating light can be irradiated, and these are arranged on both sides. Accelerating light is radiated from either side or both sides, the photo-curing resin is cured, or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the inserted sheet are cured by the first irradiation of the accelerating light, or in the middle of curing, leaving the uncured part at that time, and by curing later, The hardening method of Claims 1-4 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery of a sheet | seat, and its vicinity.   A mask that covers the entire composite plate of claim 1 is made with the mask of claim 2. At this time, an opening slit is provided so that the accelerating light can be irradiated only around and around the sheet loaded in the plate, and the slit is disposed on the surface on which the sheet is fixed or on the opposite surface. Accelerating light is irradiated from the arranged surface, the photo-curing resin is cured, or the mask is removed during curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claims 1-5 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery, and its vicinity.   A mask that covers the entire composite plate of claim 1 is made with the mask of claim 2. At this time, slits that are opened so that the accelerating light can be irradiated only around and around the sheet loaded in the plate are provided and arranged on both sides. Accelerating light is irradiated from both sides or an arbitrary surface, the photo-curing resin is removed from the mask during curing or curing, and the uncured portion is irradiated and cured. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claims 1-6 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery of this, and its vicinity.   An irradiating device having a shape corresponding to the accelerating light is formed so that the accelerating light can be intensively irradiated around and around the sheet inserted in the composite plate of claim 1. This will irradiate one or both sides. The photo-curing resin is cured, or the irradiation distance is separated during the curing, or irradiation is continued at the position as it is to cure the uncured portion. In this way, at least the periphery and the vicinity of the loaded sheet are cured by the initial irradiation of the accelerating light, or are in the middle of curing, leaving an uncured part at that time, and then curing the sheet later The hardening method of Claims 1-7 which does not produce the sink mark which can be made in the level | step-difference part of the outer periphery, and its vicinity.

Images