JP3769578B2 - Manufacturing method of simultaneous injection molding decorative mold and mold for simultaneous injection molding decoration - Google Patents

Description

  The present invention relates to a method for producing an injection-molded simultaneous decorating product and a mold for simultaneous injection-molding decorating.

  In recent years, demands for reducing the thickness of electronic parts and various parts have increased as a result of requests for lightness, thinness, and miniaturization. In order to meet this demand, as a method for manufacturing a resin molded product using an injection mold composed of a molding space adapted to the outer shape of each product and an auxiliary space surrounding the entire circumference of the molding space, For example, there is a method for producing a resin molded product as described in Japanese Patent No. 3044027.

  In this conventional method for manufacturing a molded article, molten molding resin is injected from a gate portion into an auxiliary space portion surrounding the entire circumference of the molding space portion, which is a space formed by two molds arranged opposite to each other. After that, the molding resin is injected into the molding space part through the auxiliary space part to obtain a resin molded product, and the resin can flow into the molding space part from any direction of the auxiliary space part. It is said that even if the portion is thin, it is possible to easily allow the resin to flow uniformly.

  Here, FIG. 40A shows a schematic cross-sectional view of each mold in a state in which each space is formed by the two molds, and further, injection of molten molding resin into each space in FIG. 40A FIG. 40B shows a schematic plan view showing the flow of the molding resin at the time of the above, and the conventional manufacturing method will be specifically described with reference to these drawings. As shown in FIG. 40A, the two molds, that is, the first mold 501 and the second mold 502 are arranged to face each other and further clamped, whereby each mold 501 Between the inner surfaces of the molding space 503, a molding space 503 and an auxiliary space 504 arranged so as to communicate with the entire outer periphery of the molding space 503 are formed. The auxiliary space portion 504 is provided with a gate portion 514 through which molten molding resin can be injected from the outside of the mold 501. In such a state, when the molding resin melted into the auxiliary space portion 504 is injected from the gate portion 514, the molding resin injected into the auxiliary space portion 504 is transferred to the molding space as shown in FIG. 40B. After flowing around the entire outer periphery of the portion 503, it flows from the auxiliary space portion 504 to the molding space so that it flows toward the substantially central portion of the molding space portion 503 (the arrow d in the figure indicates the flow direction of the molding resin). The molding resin is introduced into the portion 503.

  That is, the molding resin injected into the auxiliary space portion 504 through the gate portion 514 is introduced into the molding space portion 503 from all directions from the auxiliary space portion 504 toward the molding space portion 503. Thus, by introducing the molding resin into the molding space 503 from all directions, the molding resin can be supplied into the thin molding space 503 in a substantially uniform state. Then, after the introduced molding resin is solidified, the first mold 501 and the second mold 502 are separated from each other, and the thin resin molded product 505 is taken out. Further, after that, decoration on the surface of the resin molded product 505 is performed by, for example, printing or painting, whereby an injection molded decorative product is manufactured.

Japanese Patent No. 3044027

  However, in such a conventional method for producing a resin molded product, the decoration is post-processed such that the resin molded product is decorated after the resin molded product is formed. However, there are problems in that the production efficiency is poor when the number of layers becomes multi-layered, and when the molded product has a three-dimensional shape, printing cannot be easily performed, or a pattern requiring accuracy may not be applied.

  Further, the molten molding resin injected from the gate portion 514 into the auxiliary space portion 504 is injected into the molding space portion 503 via the auxiliary space portion 504, that is, so as to surround the entire circumference of the molding space portion 503. Since the molten molding resin flows from the arranged auxiliary space portion 504 toward the molding space portion 503, there is the following problem.

  That is, the tip portion of the molten molded resin containing a large amount of gas gathers at the center of the molding space 503, and gas tends to remain in the center of the molded resin molded product 505. Further, in such a state where gas tends to remain, the molten molding resin collides with each other in the vicinity of the central portion of the molding space portion 503, so that the molding space as shown in the schematic diagram of the resin molded product 505 in FIG. In the vicinity of the center portion of the resin molded portion 505a (illustrated 505b is a resin molded portion formed by the auxiliary space portion 504) formed by the portion 503, there is a possibility that resin burn 552 due to gas may occur. . In addition, as shown in FIG. 41, the molten molding resin collides with each other in the vicinity of the center portion of the molding space portion 503, so that a weld is formed in the vicinity of the substantially central portion of the resin molding portion 505a formed by the molding space portion 503. There is a problem that 551 is likely to occur.

  Further, the molding resin melted through the auxiliary space portion 504 that surrounds the entire circumference of the molding space portion 503 is injected into the molding space portion 503, and substantially uniform molding resin is injected into the molding space portion 503 from all directions. In order to achieve this, the filling of the molding resin before the filling of the molding space 503 into the auxiliary space 504 located on the opposite side of the gate 514 across the molding space 503 is started. There is a restriction that it is necessary to perform. The presence of such a restriction has a problem in that the shape and arrangement of the molding space portion 503 and the auxiliary space portion 504 are limited to substantially limited ones.

  Accordingly, an object of the present invention is to solve the above-described problems, and a decorative film is disposed between the first mold and the second mold that are arranged to face each other, and the decorative film is A molten molding resin is injected into a molding space formed by the first mold, and the molding resin filled in the molding space is solidified by the injection, and the decoration is applied to the surface of the molding resin. In simultaneous injection molding with film decoration, it is possible to decorate molded products of various shapes with high accuracy and efficiency, and welds etc. at the center of the molded resin molded product It is in providing the manufacturing method of the injection-molding simultaneous decorating product which can prevent generating, and the metal mold | die for injection-molding simultaneous decorating used in the said manufacture.

  In order to achieve the above object, the present invention is configured as follows.

The method for producing an injection-molded simultaneous decorative article according to the present invention includes a decorative film disposed between a first mold and a second mold that are arranged to face each other, and the decorative film and the first mold, In the method of manufacturing an injection-molded simultaneous decorating product, the molten molding resin is injected into a molding space formed by solidifying the molding resin filled in the molding space to obtain an injection-molded simultaneous decorating product. The mold is provided with a gate portion for injecting the molding resin, and the molding space portion is formed in communication with the gate portion into which the molding resin injected from the gate portion flows, and a molding space portion for resin injection Molding resin flowing into the resin injection molding space is formed adjacent to the resin injection molding space flowing from the resin injection molding space and molding filled with the product molding space Part of the resin molding resin A resin discharge molding space formed adjacent to the product molding space that is discharged from the product molding space and flows in, and the resin injection molding space, the product molding space, and the resin discharge Each boundary portion with the molding space communicates without being partitioned from each other, and the injected molding resin flows substantially radially from the gate portion around the gate portion and spreads to fill the resin injection molding space portion. In such a state that the substantially radial spread from the gate portion is maintained, the resin flows into the product molding space portion from the resin injection molding space portion, is filled in the product molding space portion, and is discharged from the product molding space portion. It flows into the molding space for discharge and fills the entire molding space. After that, the molding resin is solidified and the surface of the molding resin is decorated with the decorative film to simultaneously apply injection molding. It is intended to get the goods.

  Moreover, this invention WHEREIN: In the manufacturing method of the said injection molding simultaneous decorating goods, a 1st metal mold | die and a 2nd metal mold | die are set | molded in the state which has arrange | positioned the decoration film between the 1st metal mold | die and the 2nd metal mold | die. The molding resin is injected in a state where the molding space is sealed and the molding space is filled. After the molding resin is filled into the molding space, the volume of the molding space is reduced to compress the filled molding resin. It is.

Moreover, this invention is a manufacturing method of the said injection molding simultaneous decorating goods, and adjoins a 1st metal mold | die and a 2nd metal mold | die in the state which has arrange | positioned the decoration film between the 1st metal mold | die and a 2nd metal mold | die. The molding resin is injected in a state where the molding space portion is arranged and opened, and thereafter the molding die filled with the first mold and the second die being clamped to reduce the volume of the molding space portion. Compression.

Moreover, the injection mold simultaneous decoration metal mold | die which concerns on this invention arrange | positions a decoration film between the 1st metal mold | die and 2nd metal mold | die which mutually opposingly arranged, the said decoration film, and the said 1st metal mold | die. The molten molding resin is injected into the molding space formed by the mold to solidify the molding resin filled in the molding space, and the surface of the molding resin is decorated with the decorative film to perform injection molding simultaneously. In the mold for simultaneous injection molding for obtaining a decorative product, the first mold is provided with a gate portion for injecting the molding resin, and the molding space portion is molded resin injected from the gate portion. Adjacent to the resin injection molding space where the resin injection molding space and the resin injection molding space formed in communication with the inflowing gate portion flow into the resin injection molding space. Product forming space And a resin discharge molding space formed adjacent to the product molding space where a part of the molding resin filled in the product molding space is discharged from the product molding space and flows in. The resin injection molding space, the product molding space, and the resin discharge molding space communicate with each other without being partitioned from each other, and the injected molding resin is centered on the gate portion. From the gate portion, it flows and spreads substantially radially and fills the resin injection molding space portion, and flows into the product molding space portion from the resin injection molding space portion while maintaining the substantially radial spread from the gate portion. It fills the product molding space, flows into the resin discharge molding space so as to be discharged from the product molding space, and fills the entire molding space.

  Further, the present invention provides an injection molding simultaneous decorating mold in which the looseness of the decorating film adhered to the surface of the second mold forming the resin discharge molding space is removed and held. A film holding part protruding in a convex shape is provided.

Furthermore, the present invention provides the injection molding simultaneous decorating mold according to any one of the above, wherein the molding space is square, the average cross-sectional area S1 (mm ² ) of the product molding space and the average thickness of the product molding space. T1 (mm), the average cross-sectional area S2 (mm ² ) of the outer frame molding space, and the average thickness T2 (mm) of the outer frame molding space are in a relationship of S1 ≧ 4 × S2 and T1 ≧ T2. .

  According to the present invention, in the method of manufacturing an injection-molded simultaneous decorative article, the molding space portion includes a product molding space portion, and a resin discharge molding space portion into which the molding resin injected into the product molding space portion flows. The product molding space portion while injecting the molding resin into the product molding space portion and discharging a part of the injected molding resin from the product molding space portion to the resin discharge molding space portion. By filling the molding resin into the product molding space, the molding resin flows from the injection position of the molding resin toward the resin ejection molding space in the product molding space. can do. Therefore, in the product molding space where a molded product as a product part is formed, the molding resin does not flow from all directions, but the molding resin flows in a direction so as not to collide with each other. Can be regulated. Therefore, it is possible to reliably prevent welds from occurring in the product molding space.

  In addition, since a part of the molding resin filled in the product molding space is to be flowed into the molding space for resin discharge, even if such a weld occurs, Since the weld is not used as a product part and occurs in the resin discharge molding space, which is a part to be removed, no particular problem occurs.

  Further, since the gas contained in the molding resin also flows and accumulates in the resin discharge molding space along with the molding resin along the regulated flow direction, the product molding space It is possible to prevent resin burning due to gas without generating a gas reservoir.

  Therefore, the quality of the surface of the molded product formed by the product molding space as the final product part can be improved without causing weld or resin burn.

  Further, since the weld and resin burn can be prevented, the surface of the molded product formed in the product molding space can be decorated with a decorative film together with the molding, and efficient decoration Can be realized.

Furthermore, by being able to realize simultaneous injection molding using such a decorative film, even if the decoration becomes multicolored, the productivity is hardly affected. In addition, since the decorative film is formed following the shape of the mold, it is possible to decorate a three-dimensional surface, which is difficult with normal printing, and to perform highly accurate decoration efficiently. Can do.

  Further, according to the present invention, the molding space portion further includes a resin injection molding space portion into which the molding resin is injected from the outside of the molding space portion. Injecting the molding resin into the resin injection molding space and flowing the injected molding resin into the product molding space from the resin injection molding space, Molding resin can be injected. Thus, the injection hole portion where the molding resin is injected is not directly provided in the product molding space portion, but is provided in the molding space portion for resin injection which is another space portion. The decorative film can be prevented from being damaged by the injection pressure of the molding resin injected from the injection hole and the injection of the molding resin into the product molding space is made more uniform. Can do.

  Moreover, according to this invention, even if it is a case where the said shaping | molding space part is provided with two product shaping | molding space parts, the manufacturing method which has the above-mentioned effect can be provided. Further, in the molding space portion, for each product molding space portion, even if the resin injection molding space portion and the resin discharge molding space portion are not individually provided, for example, By providing the resin injection molding space and the common resin discharge molding space, it is possible to efficiently arrange the respective spaces in the molding space. Therefore, it is possible to provide an efficient method for producing an injection-molded and simultaneously decorated product such as downsizing of a mold and effective use of a molding resin to be used.

  Moreover, according to this invention, the various shaping | molding methods used by injection molding are applicable to the manufacturing method of the injection molding simultaneous decorating product of this invention. For example, the molding resin exposed to the mold periphery can be eliminated by injecting the molding resin into the molding space in a sealed state, and the volume of the molding space after the molding resin is injected. By reducing the size, the molding resin can be injected well and the density of the injected molding resin can be increased even when the molding space is a thin space or the like. It is possible to manufacture a high-density molded product.

  Further, according to the present invention, in the mold for simultaneous decoration for injection molding, the molding space part is a product molding space part, and the resin discharge molding space part into which the molding resin injected into the product molding space part flows. The molding resin is injected into the product molding space, and a part of the injected molding resin is discharged from the product molding space to the resin discharge molding space. The molding resin is filled into the product molding space, and the molding resin flows in the product molding space from the injection position of the molding resin toward the resin discharging molding space. It is possible to realize the production of a molded product called forming. Therefore, it is possible to reliably prevent welds from occurring in the product molding space. Even in the case where the above-described weld occurs, the weld is not used as a product part, but is generated in the product molding space, which is a part to be removed. Absent.

  Further, since the gas contained in the molding resin also flows and accumulates in the resin discharge molding space along with the molding resin along the regulated flow direction, the product molding space It is possible to prevent resin burning due to gas without generating a gas reservoir.

Therefore, on the surface of the molded product formed by the product molding space as the final product part, the quality of the injection-molding decorative decoration can be improved without causing welds or resin burns. A mold can be provided.

  Further, according to the present invention, the molding space portion further includes a resin injection molding space portion into which the molding resin is injected from the outside of the molding space portion. Injecting the molding resin into the resin injection molding space and flowing the injected molding resin into the product molding space from the resin injection molding space, It is possible to realize a method for manufacturing a molded product in which a molding resin is injected. Thus, the injection hole portion where the molding resin is injected is not directly provided in the product molding space portion, but is provided in the molding space portion for resin injection which is another space portion. Injection molding that can prevent the decorative film from being damaged by the injection pressure or the like of the molding resin injected from the injection hole, and can more uniformly inject the molding resin into the product molding space. A mold for simultaneous decoration can be provided.

  Moreover, according to this invention, since the said film holding | maintenance part is made to contact | adhere, the arrangement | positioning of the said decoration film can be hold | maintained, performing the removal of the slack of the said decoration film. In addition, the surface of the molded product can be reliably decorated at a predetermined position on the surface of the molded product without forming a wrinkle or a slack trace of the decorative film, and high-precision injection. A molded simultaneous decorative article can be manufactured.

  In addition, in this invention, when the some suction part which attracts | sucks and holds a decorative film is provided in the said film holding part or its vicinity, the holding | maintenance of the said decorative film can be made more reliable.

Further, when the first mold or the second mold is provided with a groove portion and an engagement portion that can be engaged with the groove portion, the groove portion and the engagement portion are engaged via the decorative film. Thus, tension can be applied to the decorative film. Thereby, tension can be automatically applied to the decorative film when the first mold and the second mold are clamped via the decorative film, and the molding space Generation | occurrence | production of the wrinkle and slack of the said decorative film in a part can be suppressed.

  Furthermore, when an air vent is provided in the resin discharge molding space, the gas focused in the resin discharge molding space can be reliably removed through the air vent. In addition, since the air vent part is positioned in the vicinity of the peripheral part of the product molding space part in the resin discharge molding space part, gas remaining slightly in the product molding space part is also removed. Can do.

  Prior to the description of embodiments of the present invention, the claims of the present invention and definitions of terms used in the present specification will be described.

  The term “molding space” refers to a space formed by the decorative film and the first mold, in which a decorative film is disposed between the first mold and the second mold that are arranged to face each other. The resin is injected into the space, and the resin is further solidified, so that the resin molded product corresponding to the shape of the space (that is, the product portion and the removal portion for forming the product are included). It is a space in which the entire molded product) can be formed.

  The term “product molding space” refers to a space in which a resin molded product that can be the product portion of the molding space is formed. That is, it is a space in which a product portion is formed by removing the removed portion from the resin molded product.

  The term “resin discharging molding space” is a part of the molding space, formed adjacent to and in communication with at least a part of the periphery of the product molding space, and injected into the product molding space. A part of the molded resin thus formed is a space filled via the product molding space, and is a space that is always provided in the molding space of the present invention. In other words, it is a discharge destination space in which a part of the molding resin injected into the product molding space is discharged from the product molding space and flows in. The part of the resin molded product formed in the resin discharge space is mainly removed from the resin molded product as the removed portion in many cases, and the product is removed from the resin molded product by such removal. Will be formed. However, the part formed in the resin discharge space may be used as a part of the product part without being removed. The resin discharge molding space may be referred to as an additional molding space.

  The term “molding space for resin injection” is a part of the molding space and is formed adjacent to and in communication with at least a part of the periphery of the product molding space. It is a space injected from the outside of the molding space. Furthermore, the molding resin injected from the outside flows into the product molding space through the resin injection molding space, thereby injecting the molding resin into the product molding space. But there is. The part of the resin molded product formed in the resin injection molding space is mainly removed from the resin molded product as the removed portion in many cases. Will be formed. However, the part formed in the resin injection molding space may be used as a part of the product part without being removed. The resin injection molding space may be referred to as an auxiliary molding space.

  In describing embodiments of the present invention, first, a conceptual configuration of the present invention will be described in detail. In the present invention, an injection molding simultaneous decorating method is adopted as a method for decorating an injection molded product. In the simultaneous injection molding decoration method, a decorative film is placed between the first mold and the second mold of the injection mold, and each mold is clamped, and the decorative film and the first mold are arranged. A method of obtaining a simultaneous injection molded decorative product in which a decorative film is integrated with a molding resin by injecting a molten molding resin into a molding space formed by one mold from a gate portion and solidifying the injected molding resin It is. In the subsequent process, the base sheet constituting the decorative film may be peeled off. In the injection-molding simultaneous decorating method, since a decorating film that has been subjected to printing in advance is used, the productivity is hardly affected even if the decorating is multicolored. Further, since the decorative film is formed following the shape of the second mold, it is possible to decorate a three-dimensional shape surface that cannot be obtained by normal printing. Moreover, patterning is possible on a decorative film.

  Further, in the present invention, the molding space portion is composed of a plurality of product molding space portions and outer frame molding space portions surrounding each product molding space portion, which are in communication with each other, for example, the outer frame molding space portion, It consists of a resin injection molding space near the gate and a resin discharge molding space located away from the gate via the product molding space, and the molten molding resin passes through the resin injection molding space. A part of the molding resin filled in the product molding space part flows into the resin discharge molding space part and is filled after the product molding space part is filled or at the same time with the filling.

  In addition, since the respective space portions are formed, the first mold has a product molded product forming portion capable of forming the product molding space portion with the decorative film, and the additive A discharge space capable of forming the resin discharge molding space portion between the decorative film and an injection space molded product forming portion capable of forming the resin injection molding space portion with the decorative film. It can be said that the molded product forming portion is provided in a concave portion formed on the surface thereof. Further, the injection space molded product forming portion is disposed adjacent to the product molding space forming portion, and the discharge space molded product forming portion is disposed with respect to the product molding space forming portion. Adjacent to each other.

In the present invention, in order to cause the molding resin to flow in this way, the molding space portion has a square shape such as a plate shape, the average cross-sectional area of the product molding space portion is S1 (mm ² ), and the product molding space portion When the average thickness is T1 (mm), the average cross-sectional area of the outer frame molding space is S2 (mm ² ), and the average thickness of the outer frame molding space is T2 (mm), S1 ≧ 4 × S2 and T1 ≧ T2 It is preferable to use a mold for simultaneous decoration with injection molding.

That is, by setting the average thickness and average cross-sectional area of the product molding space part to be equal to or greater than the average thickness and average cross-sectional area of the outer frame molding space part, the molten molding resin can be used, for example, as a resin injection molding space part. A mold that can be filled into the molding space for resin discharge after being filled into the product molding space can be configured. These numerical values can be set from the test results shown in Table 1.

  In the test results of Table 1, whether or not the flow of the desired molding resin can be determined is that the molten molding resin is filled in the product molding space via the resin injection molding space or with the filling. The case where a part of the molding resin filled in the product molding space flows into the molding space for resin discharge and is filled is indicated by ◯, and the case where it is not is indicated by ×. In the case of “otherwise: ×”, although the flow of the molding resin itself could be confirmed in the molding space for resin discharge, it was not considered to be completely filled. When it is done: ○ ”.

  By configuring the mold having such a shape, the tip portion of the molding resin injected into the molding space is sent to the molding space for resin discharge, so that the gas generated in the molding resin is molded. The resin can be fed into the resin discharge molding space together with the resin, and the residual amount of gas in the product molding space can be reduced. Moreover, since it is possible to avoid the molten molding resins from colliding with each other in the vicinity of the center of the product molding space, resin burning due to gas does not occur. Furthermore, since it is possible to avoid the molten molding resin from colliding with each other in the vicinity of the center of the product molding space, even if a weld is generated, the location where the weld is generated is determined as a resin discharging molding space. Can be moved to. In addition, when adopting the injection molding simultaneous decorating method, a large flaw occurs at a position corresponding to the weld occurrence location of the decorative film, and the appearance of the simultaneous injection molded decorative product is liable to be damaged. Thus, the weld occurrence location can be moved to the resin discharge molding space, and this problem can be solved at the same time.

  Furthermore, in this invention, the injection mold simultaneous decoration metal mold | die which can prevent generation | occurrence | production of the wrinkles of the decoration film which may newly arise in a product molded product part by adoption of the injection molding simultaneous decoration method is 1st metal mold | die. It is good also as a structure which has a type | mold and a 2nd metal mold | die, and a partition convex part is provided in the outer frame molding space part surrounding each product molding space part of the recessed part surface of a 2nd metal mold | die. In the simultaneous injection molding decorating method, a drag load accompanying the flow of molten molding resin is usually applied to the decorating film, which causes slack in the decorating film. However, when the partition convex part is provided in the concave surface of the second mold, it is possible to make it difficult for the decorative film to loosen for the following reason. This is because the molten molding resin is filled in the molding space for resin injection and then enters the product molding space through the partition projection provided between the molding molding and the product molding space. At this time, the molten molding resin is filled in the product molding space portion while holding the decorative film with the partition convex portion and stretching it. Therefore, a small wrinkle is hardly generated in the decorative film surrounded by the partition convex portions.

In addition, the formation position of a partition convex part may be provided in the position which touches a product shaping | molding space part, and may be provided in the distant position. That is, the molding space part surrounded by the partition convex part may be only the product molding space part or may include the product molding space part and the outer frame molding space part. Moreover, a partition convex part may be provided continuously like a ring | wheel, and may be provided discontinuously. Moreover, in this invention, it is good also as a structure by which a suction pin is provided in a partition convex part in the said metal mold | die for simultaneous injection molding. The suction pin has a function of sucking and fixing the decorative film to the second mold, air and dust remaining between the decorative film and the second mold, and gas generated from the base sheet of the decorative film, etc. There is a function to remove. The shape of the suction pin may be a square shape such as a block in addition to a cylindrical shape. Moreover, you may provide a suction pin also in the shaping | molding space part enclosed by the partition convex part.

  Moreover, in this invention, it is good also as a structure by which the tension groove is provided in the reference surface of the outer periphery of the outer frame shaping | molding space part in the said metal mold | die for simultaneous injection molding. Even if the molding space surrounded by the partitioning convex part is formed without any wrinkles, the outside of the partitioning convex part, especially the resin discharge molding space part, is still in a state where wrinkles are likely to occur. The position of the decoration of the simultaneous decoration may be slightly shifted. However, if the mold for decorating simultaneously with injection molding is provided with a tension groove, the slack of the decoration film generated in the resin discharge molding space is relieved by the tension groove and the decoration film in the molding space The overall tension is also kept moderate. Therefore, the position of the decoration of the injection-molded simultaneous decoration product does not shift. The tension groove may be provided continuously like a ring or discontinuously. However, the case where the tension groove is provided on the entire outer periphery of the molding space portion like a ring is preferable because the effect becomes uniform in any direction.

  Moreover, in this invention, you may provide an air vent pin in the position which touches the product shaping | molding space part in the resin discharge shaping | molding space part in the said injection molding simultaneous decorating metal mold | die. In the injection molding simultaneous decorating method, the decorative film is sandwiched between the second mold side and molded. Therefore, the molding resin gas from the second mold side is hard to escape, and the molding resin is more difficult to escape than a general injection molding mold. Difficult to escape gas. For this reason, the device for letting gas escape to the 1st metal mold side is needed. Further, a large amount of molding resin gas is contained in the tip portion of the molding resin which is relatively melted. Therefore, by providing an air vent pin at a location where the end of the molten mold resin on the first mold side finally gathers (that is, the resin discharge molding space), the gap between the air vent pin and the first mold body is removed. Molded resin gas collected in the resin discharge molding space can be released.

  In particular, by providing the air vent pin at the position closest to the product molding space (that is, the position in contact with the product molding space), not only the molding resin gas focused on the resin discharge molding space but also the product molding space In addition, the molding resin gas that can remain slightly can be efficiently released. The contact width between the air vent pin and the product molding space is preferably 0.1 to 1.0 mm. If the contact width is larger than 1.0 mm, even after the injection molded simultaneous decorative product is cut into the product molded product part and the resin discharge molded product part, this contacted part remains as a trace in the product molded product part, and the appearance is poor. It is to become. On the other hand, if the contacting portion is smaller than 0.1 mm, the molding resin gas slightly remaining in the product molding space is difficult to escape. The shape of the air vent pin may be a square shape such as a block in addition to a cylindrical shape.

  As described above, by simultaneous injection molding using this injection molding simultaneous decorating mold, simultaneous injection molding having a plurality of product molded product parts and an outer frame molded product part communicating with the product molded product parts. It is a decorative product, and an injection molded simultaneous decorative product in which an air vent mark is formed on the resin discharge molded product portion in the outer frame molded product portion in contact with the product molded product portion is obtained. The air vent mark may or may not penetrate.

First embodiment

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. In the accompanying drawings used in the description of the respective embodiments of the present invention, the same parts are denoted by the same reference numerals.

  First, as a schematic explanatory view schematically showing a method for manufacturing an injection-molded simultaneous decorative article according to the first embodiment, schematic sectional views of a first mold and a second mold are shown in FIG. 1, FIG. 2, FIG. As shown in FIG. 5 is a plan view of the first mold, FIG. 6A is a sectional view taken along the line BB of the first mold of FIG. 5, FIG. 6B is a sectional view taken along the line DD, and FIG. A sectional view is shown in FIG. 6C, and a sectional view taken along the line EE is shown in FIG. 6D. Further, FIG. 7 shows a plan view of the second mold, FIG. 8A shows a cross-sectional view taken along line FF in FIG. 8B, and FIG. 8B shows a cross-sectional view taken along line GG. The cross section of the first mold shown in FIGS. 1 to 4 is a cross-sectional view taken along the line AA in the first mold of FIG. 5, and the cross section of the second mold is the same as that of FIG. It is the sectional view on the AA line in 2 molds.

  First, as shown in FIG. 1, in the manufacturing method of the injection-molding simultaneous decorating product of the first embodiment, 2 of the first mold 1 and the second mold 2 constituting the mold for simultaneous injection-molding decorating. Two molds are used, and the surfaces of the molds 1 and 2 where the concave portions are formed are arranged opposite to each other, and a pattern is added to the surface of the resin molded product between the molds 1 and 2. By disposing the decorative film 5 to be injected and injecting a molten molding resin into a molding space formed by the concave portion of the first mold 1 and the surface of the decorative film 5. Along with cooling and solidification, the surface of the molded resin that is in contact with the decorative film 5 is decorated to obtain an injection-molded simultaneous decorated product.

  As shown in FIG. 5 and FIGS. 6A to 6D, the first mold 1 has a substantially rectangular flat plate shape, and is directly connected to the second mold 2 at the four peripheral ends on one surface thereof. A reference surface 11 which is an upper surface of the convex portion to be contacted is formed continuously along the four-circumferential end portion of the substantially square shape. A concave portion 12 having a shape adapted to the outer shape of the resin molded product is formed in the inner portion surrounded by the reference surface 11, and a decorative film described later is further formed between the concave portion 12 and the reference surface 11. A tension groove 15, which is a portion for applying tension to 5, is formed along the inner periphery of the reference surface 11.

Further, as shown in FIGS. 5 and 6D, an injection port for injecting molten molding resin is provided in the vicinity of the center of the first mold 1 in the vertical and horizontal directions, that is, in the vicinity of the center of the inner bottom portion of the recess 12. A gate portion 14 is formed. As shown in FIGS. 5 and 6B, an air vent pin 19 is provided on the inner bottom portion of the recess 12 of the first mold 1 in the first embodiment as needed. Will be described later.

  On the other hand, as shown in FIG. 7, FIG. 8A and FIG. 8B, the second mold 2 has an outer shape of substantially the same size so as to correspond to the first mold 1, and is formed in a substantially rectangular flat plate shape. The reference surface 21 that is formed with substantially the same arrangement and width as the reference surface 11 of the first mold 1 and that is the upper surface of the convex portion that is in direct contact with the reference surface 11 of the first mold 1, It is continuously formed on the outer periphery of the four sides. Furthermore, in the inner portion surrounded by the reference surface 21, a concave portion 22 having a shape adapted to the outer shape of the resin molded product and a tension groove 15 which is a portion for applying tension to the decorative film 5 described later are formed. Has been.

  The reference surface 11 and the reference surface 21 provided with the first mold 1 and the second mold 2 having such a configuration face each other (that is, the reference surface 11 and the reference surface 21 can match each other). As shown in FIG. 1, the first mold 1 and the second mold 2 are arranged so that the decorative film 5 is disposed between the first mold 1 and the second mold 2. The inner space of the concave portion 12 of the mold 1 and the inner space of the concave portion 22 of the second mold 2 can be arranged so as to be in contact with each other through the decorative film 5. From such a state, the first mold 1 and the reference surface 11 of the first mold 1 and the reference surface 21 of the second mold 2 are brought into contact with each other via the decorative film 5. By performing mold clamping with the second mold 2, the molding space 3 is formed between the decorative film 5 and the first mold 1. The space shape of the molding space 3, that is, the height, width, and thickness of the space correspond to a predetermined height, width, and thickness of the formed resin molded product. By forming the molding space 3 in this way, a resin (molding resin) 4 in a molten state is injected into the molding space 3 and then solidified, so that an injection molding simultaneous decorating product having a predetermined size is obtained. 10 can be obtained.

  Here, the shaping | molding space part 3 formed when the 1st metal mold | die 1 and the 2nd metal mold | die 2 are made into a mold-clamping state on both sides of the decorating film 5 is comprised by the several space part. For example, the molding space 3 is constituted by a product molding space, a resin discharge space, and a resin injection space. FIG. 9 shows a plan layout view of the respective space portions in the molding space portion 3, and FIG. 10 shows a cross-sectional view taken along line AA in FIG. 9. With reference to these drawings, each space portion is shown. Will be described in detail. In addition, the plan view in FIG. 9 is obtained by arranging the respective space portions on the plan view of the first mold in a state where the first mold 1 is viewed from the surface of the decorative film 5. Further, FIG. 9 is a drawing for the purpose of clearly showing the arrangement of the respective space portions, and only the main configuration of the first mold 1 is shown in order to facilitate understanding thereof. The detailed configuration is partially omitted. Moreover, in FIG.9 and FIG.10, the hatching pattern is attached | subjected so that it may be easy to recognize each space part visually.

  As shown in FIGS. 9 and 10, in the molding space portion 3 formed by being surrounded by the concave portion 12 of the first mold 1 and the decorative film 5, four pieces arranged substantially evenly without contacting each other. A product molding space 31 (which is an example of a first product molding space and a second product molding space) is disposed. The product molding space 31 is a space where a final product portion of the resin molded product formed by the molding space is formed. In this way, the four product molding spaces 31 are arranged. Therefore, the injection molding simultaneous decorating mold composed of the first mold 1 and the second mold 2 is a multi-chamfer mold capable of molding a plurality of products at a time.

  Further, the molding space portion 3 includes a resin injection molding space portion 32 (a common resin injection molding space portion) which is a space individually communicating with and adjacent to a part of the outer periphery of each product molding space portion 31. And a resin discharge molding space 33 (which is an example of a common resin discharge molding space). The resin injection molding space 32 is disposed in communication with the resin injection gate 14 disposed in the vicinity of the approximate center of the first mold 1. Specifically, as shown in FIG. The four product molding space portions 31 are arranged in a substantially cross shape in plan view. On the other hand, the resin discharge molding space 33 is arranged in a substantially O-shape in plan view between the inner peripheral portion of the recess 12 of the first mold 1 and the four product molding spaces 31. Further, the respective boundary portions of the product molding space portion 31, the resin injection molding space portion 32, and the resin discharge molding space portion 33 are communicated with each other without being partitioned from each other, and the gate portion 14 is provided. Further, the resin injected into the resin injection molding space 32 fills the resin injection molding space 32 itself, and a part of the resin flows into each product molding space 31, and each product molding space 31. In addition, a part of the resin that has flowed into each product molding space 31 can flow into the resin discharge molding space 33 so as to be discharged. In addition, in FIG. 10, the space enclosed by the recessed part 12 of the 1st metal mold | die 1 and the decorating film 5 is the shaping | molding space part 3, and with the recessed part 22 of the 2nd metal mold | die 2, and the decorating film 5 There is a separate enclosed space. The space disappears when the decorative film 5 is pressed downward in the figure by injection of resin into the molding space 3, that is, when the space is pressed against the inner bottom surface of the recess 22 of the second mold 2. It is. Further, the resin injection molding space 32 and the resin discharge molding space 33 are arranged so as to surround the outer periphery of each product molding space 31, and therefore the resin injection molding space 32 and the resin discharge It can also be said that an outer frame forming space portion that is a space of an outer frame portion surrounding each product forming space portion 31 is constituted by the forming space portion 33 for use.

  In relation to each of these spatial arrangements, the configuration of the second mold 2 will be further described. As shown in FIGS. 7 and 8A, the inner bottom surface of the concave portion 22 of the second mold 2 is disposed so as to surround the outer periphery of the portion corresponding to each product molding space portion 31 and is opposed to the inner surface. The partition convex part 23 protruded toward the 1st metal mold | die 1 side is formed. That is, each partition convex portion 23 formed so as to surround the entire outer periphery of the portion corresponding to each product molding space portion 31 includes a resin injection molding space portion 32 and a resin discharge molding space portion 33. It is arranged and formed in the vicinity of the boundary with each product molding space 31. Further, as shown in FIG. 7 and FIG. 8A, the convex upper surface of each partition projection 23 and the vicinity of each partition projection 23 in the molding space portion 3 surrounded by each partition projection 23 are A plurality of suction pins 25 are provided. Each suction pin 25 is connected to a suction device via a suction passage (not shown).

  When the molten resin is injected into each product molding space 31, the decorative film 5 is stretched and is in close contact with the inner bottom of the recess 22 of the second mold 2. . At this time, these partitioning projections 23 increase the surface area that the decorative film 5 adheres to by sticking the decorative film 5 to the surface of the convex raised portion, so that the decorative film 5 is loosened or the like. Is generated in advance, and the decorative film 5 is kept in close contact with the inner bottom surface of the recess 22. Furthermore, by providing each suction pin 25 on or in the vicinity of each partitioning convex portion 23, the decorative film 5 can be closely attached to the respective convex raised portions and maintained in this close contact state. This can be done more reliably. In addition, in this embodiment, each partition convex part 23 is an example of the film holding part which hold | maintains the arrangement | positioning, removing the slack of the decorating film 5, and also each suction pin 25. Is an example of a suction part.

  Next, when the first mold 1 and the second mold 2 are clamped, there are concave grooves provided in the reference surface 11 and the reference surface 12 that are in contact with each other via the decorative film 5. The tension groove 15 will be described. The tension groove 15 is provided to alleviate the slackness of the decorative film 5 generated in the molding space 3 when the decorative film 5 is disposed between the first mold 1 and the second mold 2. is there.

  Here, FIG. 11A shows a partially enlarged schematic cross-sectional view in the vicinity of each tension groove 15 in a state before mold clamping in which the decorative film 5 is disposed between the first mold 1 and the second mold 2. Furthermore, FIG. 11B shows a partially enlarged schematic cross-sectional view of the clamped state, and the function of the tension groove 15 will be specifically described with reference to these drawings.

  As shown in FIG. 11A, an engagement member 16 that is an example of an engagement portion that is engaged with a concave groove portion in the tension groove 15 is engaged with the tension groove 15 of the first mold 1. In the engaged state, the engaging member 16 protrudes from the reference surface 11 so as to be engageable with the tension groove 15 of the second mold 2. Moreover, on the 2nd metal mold | die 2 arrange | positioned below illustration, although the decorating film 5 is arrange | positioned, the decorating film 5 is made into the state which has slack.

  In such a state, as shown in FIG. 11B, when the first mold 1 and the second mold 2 are clamped, the lower portion of the engaging member 16 shown in the figure is connected to the tension groove 15 of the second mold 2. At this time, a part of the decorative film 5 is pushed into the tension groove 15 of the second mold 2 because the engagement is performed via the decorative film 5. Thus, the slack can be absorbed so that no wrinkles are generated on the decorative film 5.

  In the present embodiment, the tension groove 15 is formed in the first mold 1 and the engagement member 16 is engaged with the tension groove 15. However, the present invention is limited to this case. Is not to be done. For example, it may replace with such a case and the case where the convex-shaped protrusion part is previously formed in the 1st metal mold | die 1 may be sufficient. Even in such a case, by engaging the raised portion with the tension groove 15 of the second mold 2, it is possible to obtain the same effect as when the engagement member 16 is used.

  Moreover, it is preferable to provide the tension groove 15 in the outer periphery of the shaping | molding space part 3, and it is preferable to provide in the range of depth 0.5-5mm and width 0.5-7mm. This is because if the depth or width is too small, the effect of alleviating the slack of the decorative film 5 is weak, and if the depth or width is too large, the strength of the mold is reduced.

  Further, the tension groove 15 may be provided in both the A mold 1 and the B mold 2 or may be provided in only one of them. Moreover, when providing in both, you may vary depth and width, respectively.

  Next, each air vent pin 19 (an example of an air vent part) provided in the resin discharge molding space 33 in the first mold 1 will be described. The air vent pin 19 is provided to efficiently release the gas contained in the molten molding resin from the molding space 3 to the outside.

  For that purpose, as shown in FIG. 6B, the position where each air vent pin 19 is provided is located at the position where the end of the molten molding resin 4 is finally filled, that is, the position farthest from the gate portion 14. It becomes the resin discharge molding space 33.

  However, in practice, there is a greater possibility that the gas that can remain slightly in each product molding space 31 is more problematic than the gas that collects in the resin discharge molding space 33. In order to remove efficiently, it is preferable to provide the resin discharge molding space 33 at a position close to the product molding space 31.

  Therefore, by providing the air vent pin 19 in the resin discharge molding space 33 farthest from the gate portion 14 and in the vicinity of the position in contact with the product molding space 31, the gas converged on the resin discharge molding space 33. In addition, the gas slightly remaining in each product molding space 31 can be released.

  The shape, size, and position of each air vent pin 19 and the width of contact with the product molding space 31 are the size and shape of each product molding space 31, the distance from the gate 14, and for simultaneous injection molding It is determined appropriately based on the magnitude of flow resistance of the molding resin 4 due to the unevenness of the mold (that is, the first mold 1 and the second mold 2).

  Further, the number of the air vent pins 19 to be installed is appropriately determined so that the gas is smoothly discharged based on the volume of the molding space 3 and the respective product molding space 31 and the speed at which the gas should be discharged. .

  In particular, in the simultaneous injection molding method, the gas of the molding resin 4 is difficult to escape from the second mold 2 that is in contact with the decorative film 5 and the inner bottom surface of the concave portion 22. It is useful to install 19, and since the problem can be solved in this way, it is possible to use a molding resin 4 that generates a large amount of gas.

  Moreover, as shown in FIG. 4, the injection molding simultaneous decoration product 10 formed of the resin filled in the molding space 3 is a product molding which is a part formed of the resin filled in the product molding space 31. Product portion 30, injection space molded product portion 42 which is a portion formed in resin injection molding space portion 32, and discharge space molded product portion 43 which is a portion formed in resin discharge molding space portion 33. Can be divided into The injection space molded product portion 42 and the discharge space molded product portion 43 are formed around the respective product molded product portions 30. Therefore, these molded product portions are combined to form an outer frame molded product portion. 40. In such molding of the simultaneous injection-molded decorative product 10, by providing each air vent pin 19, a plurality of air vent holes 20 are formed in the simultaneous injection-molded decorative product 10, as shown in FIG. Each of these air vent holes 20 may be used for positioning when cutting the simultaneous injection-molded decorative product 10 into the product molded product 30 and the outer frame molded product portion 40 in post-processing after injection molding. it can.

  Further, since the air vent hole 20 is formed in the discharge space molded part 43, the air vent hole 20 can be separated from the product molded part 30 as a part of the outer frame molded part 40, and the product molded part 30 has the advantage of not adversely affecting 30.

  The molding resin 4 may be a thermoplastic resin such as an acrylic resin, polycarbonate resin, styrene resin, polyamide resin, noryl resin, polyester resin, olefin resin, urethane resin, or acrylonitrile butadiene styrene resin. Can be used.

  Further, as shown in FIG. 4, in the vicinity of the peripheral portion of the inner bottom portion of the concave portion 12 of the first mold 1, the injection molded simultaneous decorating article 10 formed in the molding space portion 3 is extruded, and the first mold A plurality of ejector pins 24 to be released from the concave portion 12 of the mold 1 are provided. Instead of the case where the release is performed by the respective ejector pins 24 as described above, the air vent pin 19 may be provided with a function of the release operation.

  Next, a method for manufacturing the injection-molded simultaneous decorated article 10 using the first mold 1, the second mold 2, and the decorative film 5 having the above-described configuration will be described in detail.

  First, as shown in FIG. 1, the first mold 1 and the second mold 2 are arranged to face each other so that the respective concave portions 12 and 22 face each other (that is, in FIG. 1, the concave portions of the second mold 2 are arranged). 22 is facing upward in the drawing and the concave portion 12 of the first mold 1 is facing downward in the drawing), and the surface on which the decorative layer 50 is disposed between the first mold 1 and the second mold 2 The decorative film 5 is arranged so that is arranged on the first mold 1 side. At this time, the respective molds 1 and 2 are positioned so that the reference surface 11 of the first mold 1 and the reference surface 21 of the second mold 2 coincide with each other via the decorative film 5. The positioning of the decorative film 5 with respect to the molds 1 and 2 is also performed.

  After this positioning, as shown in FIG. 2, the first mold 1 and the second mold 2 are clamped via the decorative film 5. 9 and 10, the mold space 3 is formed by the concave portion 12 of the first mold 1 and the decorative film 5, that is, each product molding space portion 31, resin injection molding space, as shown in FIGS. 9 and 10. A portion 32 and a resin discharge molding space portion 33 are formed. At the time of clamping, as shown in FIGS. 11A and 11B, an engaging member 16 (not shown in FIGS. 1 and 2) engaged with the tension groove 15 of the first mold 1 is provided. By being engaged with the tension groove 15 of the second mold 2 via the decorative film 5, tension is applied to the decorative film 5, and wrinkles, slack, and the like are removed.

  Thereafter, as shown in FIG. 2, injection of the molten molding resin 4 from the gate portion 14 into the molding space portion 3 is started. The injected molding resin 4 is first injected into the resin injection molding space 32 to press the decorative film 5 toward the second mold 2 and the pressed decorative film 5 contacts the partition projection 23. It is in contact with and fixed by the suction pin 25. Thereafter, the molten molding resin 4 fills the resin injection molding space 32 in the vicinity of the gate portion 14 and enters the respective product molding space portions 31 beyond the partition convex portions 23 on the vicinity side.

  At that time, the molten molding resin 4 fills the molding space 3 while holding the decorative film 5 with the partitioning convex portions 23 and gradually stretching the decorative film 5, so that the decorative film 5 is hardly loosened. Therefore, a small wrinkle is not easily generated in the decorative film 5 surrounded by the respective partition projections 23.

  Thereafter, after the molten molding resin 4 fills the respective product molding space portions 31, or together with this filling, a part of the molding resin 4 injected into each product molding space portion 31 is molded into the resin discharge molding space portion 33. Then, the resin discharge molding space 33 is filled with the molding resin 4. As a result, the molding space 3 is filled with the molding resin 4 (see FIG. 3). Further, in the process of filling in this way, most of the gas generated by the molding resin 4 is focused on the molding space 33 for resin discharge, and the gas focused by the respective air vent pins 19 is stored in the molding space 3. It is discharged outside. Further, since each air vent pin 19 is provided in the resin discharge molding space 33 in the vicinity of each product molding space 31, the gas slightly remaining in each product molding space 31 can also be reduced. It is discharged to the outside by the air vent pin 19 and removed.

  Here, the flow of the molding resin 4 injected into the molding space 3 is visually shown in FIG. 12 using a space layout diagram (schematic plan view) of the molding space 3. As shown in FIG. 12, the molding resin 4 in a molten state injected from the gate portion 14 disposed in the vicinity of the approximate center of the molding space portion 3 is first in direct communication with the gate portion 14 for resin injection. The injected molding resin 4 is injected into the molding space portion 32 and flows into the resin injection molding space portion 32 in the flow direction F1 (arrow in the figure) so as to spread radially from the gate portion. Filled. As the injection progresses, the molding resin 4 spreads in a substantially radial flow direction F1, flows from the resin injection molding space portion 32 into the respective product molding space portions 31, and passes through the respective product molding space portions 31. Fill. Further, the molding resin 4 spreads in a substantially radial manner, and a part of the molding resin 4 injected into each product molding space portion 31 flows into the resin discharge molding space portion 33 so as to be discharged. The whole is filled with the molding resin 4.

  When the molding resin 4 is injected so as to expand in the molding space 3 in a substantially radial flow direction F1 as shown in FIG. 12, the generated gas is a space portion at the end portion of the molding resin 4 injection. It is possible to collect in the resin discharge molding space 33, and in each product molding space 31, there is no portion where the injected molding resins 4 collide with each other, and each product molding space It is possible to prevent welds from occurring at 31.

  After the molding space 4 is filled with the molding resin 4 in this way, the molding resin 4 in a molten state is cooled and solidified. Thereafter, as shown in FIG. 4, the mold clamping between the first mold 1 and the second mold 2 is released, and the respective ejector pins 24 are projected to release the simultaneous injection-molded decorative product 10. The Each decorating layer 50 in the decorating film 5 is peeled off from the base sheet 51 and fixed to the surface that has been in contact with the decorating film 5 in the simultaneous injection molding decorating product 10. Thereby, the decoration with respect to the injection-molding simultaneous decorating article 10 was performed.

  FIG. 13 shows a schematic plan view of the injection molded simultaneous decorative article 10 formed as described above. As shown in FIG. 13, in the simultaneous injection-molded decorative product 10, the respective parts of the product molded product part 30, the injection space molded product part 42, and the discharge molded product part 43 are formed in an integrated state. Has been. Further, an N-shaped pattern is attached to the surface of each product molded product portion 30 by the decorative layer 50. Further, the outer frame molded product portion 40 is formed with the respective partition groove portions 16 that are marks of the respective partition convex portions 23 in the second mold 2 so as to surround the respective product molded product portions 30. Yes. A plurality of suction holes or suction convex portions 26 that are marks of the respective suction pins 25 in the second mold 2 are formed on the partition groove portions 16 or in the vicinity thereof. This is because both the case where it is formed and the case where it is formed in a convex shape are conceivable.). Further, in the outer frame molded product portion 40, a plurality of air vent holes 20 which are marks of the respective air vent pins 19 are formed. Therefore, the partition groove portion 16, the suction hole, the suction convex portion 26, and the air vent hole 20 are not formed in each product molded product portion 30.

  As shown in FIGS. 14 and 15, the injection-molded simultaneous decorative article 10 thus obtained includes an injection space molding part 42, a discharge space molding part 43, and each product molding part 30. And is divided into four product molded product parts 30 (see FIG. 15) and outer frame molded product parts 40 (see FIG. 14), for example, each product molded part 30. Is obtained as a product part. The cutting method includes cutting, laser processing, Thomson processing, die press processing, engraving blade processing (including thermal processing), and high-frequency processing. In FIG. 13 and FIG. 15, hatching patterns are added so that the sections of the respective molded product parts can be easily recognized.

  Next, the structure of the decorative film 5 used in this embodiment will be described. As shown in FIG. 16, the decorative film 5 is formed of a base sheet 51 and a decorative layer 50 provided on the base sheet 51, and the decorative layer 50 includes a pattern layer 52 (the N-shaped pattern). And a bonding layer 53 and the like.

  As the base sheet 51, a single layer film selected from polycarbonate resin, polyamide resin, polyimide resin, polyester resin, acrylic resin, olefin resin, urethane resin, acrylonitrile butadiene styrene resin, etc., or two types selected from the above There are laminated films and copolymer films made of the above resins.

  The thickness of the base sheet 51 is preferably 5 to 500 μm. With a sheet of less than 5 μm, it is considered that the handling property at the time of setting to the mold such as the arrangement between the molds 1 and 2 and clamping is deteriorated, and the subsequent molding process becomes unstable. When the base sheet 51 exceeding 500 μm is too rigid, the adhesion to the respective partition projections 23 is reduced, and a trace of the decorative film 5 is generated on the surface of the simultaneous injection molded decorative article 10 There is.

  An easy-adhesion layer may be formed on the base sheet 51 so that the decorative layer 50 is firmly attached. Examples of the material for the easy adhesion layer include polyester resins, acrylic resins, olefin resins, and urethane resins. As a method of providing the easy-adhesion layer, any of various coating methods may be used in addition to general-purpose printing methods such as gravure printing, screen printing, and offset printing.

  On the base sheet 51, a pattern layer 52 such as a character, a geometric pattern, or a solid is formed. Examples of the material of the pattern layer 52 include acrylic resin, nitrified cotton resin, polyurethane resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, and epoxy resin. Although it can mention, it does not specifically limit.

  The pattern layer 52 may be provided with a metal film layer such as aluminum, chromium, copper, nickel, indium, tin, or silicon oxide by a method such as vacuum deposition or plating. In this case, the metal film layer may be entirely or patterned.

  The film thickness of the pattern layer 52 is preferably 0.5 μm to 50 μm. When the film thickness is less than 0.5 μm, there is a problem that sufficient designability cannot be obtained, and when it is more than 50 μm, there is a problem that it is difficult to dry after printing. However, in the case of a metal film layer, 50 to 1200 mm is preferable. This is because if the thickness of the metal film layer is less than 50 mm, there is a problem that sufficient metallic luster cannot be obtained, and if it is more than 1200 mm, there is a problem that cracks are likely to occur.

  As a method of providing the pattern layer 52 in the whole surface or in a pattern, metal film formation such as gravure printing, screen printing, offset printing method, etc., tampo printing, painting, various coating methods, vapor deposition, ion plating, sputtering method, etc. There are laws.

  The adhesive layer 53 has an action of joining the decorative film 5 and the molding resin 4. The material of the adhesive layer 53 is acrylic resin, nitrified cotton resin, polyurethane resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, epoxy resin, polycarbonate resin. It is preferable to use a resin, an olefin resin, an acrylonitrile butadiene styrene resin, or the like.

  The thickness of the adhesive layer 53 is preferably 0.5 to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing. The method for forming the adhesive layer 53 may be a general-purpose printing method such as gravure printing, offset printing, or screen printing, or any method such as painting, dipping, or reverse coater.

  When only the decorative layer 50 in the decorative film 5 is bonded to the molding resin 4, a release layer 54 may be provided between the base sheet 51 and the pattern layer 52 as shown in FIG. 17. Alternatively, the base sheet 51 may be provided with a release layer 55 to provide a base sheet having releasability.

  The release layer 54 is made of acrylic resin, nitrified cotton resin, polyurethane resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, epoxy resin, polycarbonate resin. It is preferable to use a resin, an olefin resin, an acrylonitrile butadiene styrene resin, or the like.

  The thickness of the release layer 54 is preferably 0.5 to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing. The release layer 55 may be formed by a general-purpose printing method such as gravure printing, offset printing, or screen printing, or any method such as painting, dipping, or reverse coater.

  The release layer 55 is made of acrylic resin, nitrified cotton resin, polyurethane resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, epoxy resin, polycarbonate. It is preferable to use a resin, an olefin resin, an acrylonitrile butadiene styrene resin, or the like.

  The thickness of the release layer 55 is preferably 0.5 to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing. The release layer 55 may be formed by a general-purpose printing method such as gravure printing, offset printing, or screen printing, or any method such as painting, dipping, or reverse coater.

  In the decorative film 5 having the structure as shown in FIG. 16, it is desirable that the base sheet 51 or the adhesive layer 53 be transparent or translucent in order to form a predetermined pattern by the respective picture layers 52. Moreover, in the decorative film 5 having a structure as shown in FIG. 17, the release layer 54 and the adhesive layer 53 are preferably transparent or translucent.

Second embodiment

  The present invention is not limited to the first embodiment, and can be implemented in various other modes. For example, the method for manufacturing an injection-molded simultaneous decorative article according to the second embodiment of the present invention uses a first mold and a second mold, and a decorative film having substantially the same configuration as that of the first embodiment. Although it can be said that the method is the same, the first mold and the second mold are placed opposite to each other with the decorative film placed therebetween, and the respective molds are opened without clamping. The method is different from the method of the first embodiment in that the molding resin is injected in the state. That is, in the second embodiment, the molding resin formed between the first mold and the decorative film is injected in the open state (that is, the open space), and then the molding resin is injected. Each mold is clamped to reduce the volume of the molding space and compress the molding resin filled in the molding space, so-called compression molding (injection compression molding). Is different from the first embodiment in which the molding resin is injected into the molding space portion in a sealed state, and then injection molding is performed without a change in the volume of the molding space. Hereinafter, description will be made mainly on the different parts, and the description of the first embodiment will be referred to for the same parts as the first embodiment. In addition, in the structure of each metal mold | die and decorating film in this 2nd Embodiment, in order to make an understanding of the structure easy about the structure part similar to 1st Embodiment, 1st implementation The same reference numerals as those of the forms are attached.

  First, as a schematic explanatory view schematically showing a method of manufacturing an injection-molded simultaneous decorative article according to the second embodiment, schematic sectional views of a first mold and a second mold are shown in FIGS. And shown in FIG. Further, a schematic plan view of the first mold is shown in FIG.

  As shown in FIG. 22, the first mold 71 has a substantially rectangular flat plate shape like the first mold 1 of the first embodiment, and a second mold 72 is provided at the four circumferential ends. A reference surface 11 in direct contact with the reference surface 11. A concave portion 12, a mold touch sensor 77, and a tension groove 15 are formed in an inner portion surrounded by the reference surface 11 and conform to the outer shape of the resin molded product. The mold touch sensor 77 is brought into contact with the reference surface 21 of the second mold 72 before the first mold 71 and the second mold 72 arranged opposite to each other are completely clamped. This is a sensor for injecting the molding resin 4 while keeping the distance between the first mold 71 and the second mold 72 to a predetermined dimension in a mold touch state. In the second embodiment, the case where the mold touch sensor 77 is provided in the first mold 71 will be described. However, instead of such a case, the mold touch sensor 77 is provided on the second mold 72. It may be provided on the side. In addition, the structure of the 1st metal mold | die 71 in the other part and the structure of the 2nd metal mold | die 72 are the structures similar to the 1st metal mold | die 1 and the 2nd metal mold | die 2 of 1st Embodiment.

  Moreover, as shown in FIG. 19, the first mold 71 and the second mold 72 having such a configuration are arranged opposite to each other while the decorative film 5 is positioned therebetween, as shown in FIG. Similarly, the molding space 83 can be formed. The molding space 83 is constituted by the product molding space 91, the resin injection molding space 92, and the resin discharge molding space 93, and the planar arrangement of the molding spaces. This is the same as in the first embodiment.

  A method for manufacturing the injection-molded simultaneous decorating article 80 using the first mold 71, the second mold 72, and the decorating film 5 having such a configuration will be described in detail.

  First, as shown in FIG. 18, the first mold 71 and the second mold 72 are arranged to face each other so that the respective concave portions 12 and 22 face each other, and between the first mold 71 and the second mold 72, In the middle, the decorative film 5 is arranged such that the surface on which the decorative layer 50 is arranged is arranged on the first mold 71 side. At this time, positioning of the respective reference surfaces 11 and 21 and positioning of the decorative film 5 are also performed.

  After this positioning, as shown in FIG. 19, the tip of the mold touch sensor 77 provided on the reference surface 11 of the first mold 71 is brought close to the first mold 71 and the second mold 72. However, it is brought into contact with the reference surface 21 of the second mold 72 directly or through the decorative film 5. When this contact is detected by a control device (not shown), the approach is stopped and a predetermined distance dimension is maintained between the first mold 71 and the second mold.

  In this holding state, as shown in FIG. 19, injection of the molten molding resin 4 into the molding space 83 in which the opened state is maintained is started. The molding resin 4 injected from the gate portion 14 is first injected into the resin injection molding space 92 to press the decorative film 5 toward the second mold 72, and the pressed decorative film 5 is a partition convex portion. 23 and fixed by the suction pin 25. Thereafter, the molten molding resin 4 fills the resin injection molding space 92 in the vicinity of the gate portion 14 by clamping and enters the product molding space portion 91 beyond the partition convex portion 23 on the vicinity side.

  At that time, the molten molding resin 4 fills the molding space 83 while holding the decorative film 5 with the partition convex portions 23 and stretching it, so that the decorative film 5 is not easily loosened. Therefore, a small wrinkle is unlikely to occur in the decorative film 5 surrounded by the partition convex portions 23.

  After that, as shown in FIG. 20, after the molten molding resin 4 fills the product molding space 81, or together with this filling, a part of the molding resin 4 filled in the product molding space 81 is molded for resin discharge. The space 93 is entered, and the entire molding space 83 is filled with the molding resin 4. In this filling, the first mold 71 and the second mold 72 that are in a state where the predetermined interval dimension is maintained are brought closer to each other, and the reference of the first mold 71 is passed through the decorative film 5. The surface 11 and the reference surface 21 of the second mold 72 are brought into contact with each other. As a result, the volume of the molding space 83 filled with the molding resin 4 is reduced, and the molding space 83 is changed from the open state to the sealed state. Thereby, the molding resin 4 filled in the molding space 83 is compressed and filled so as to reach every corner of the molding space 83, and the molding resin 4 is densified. Further, in the process of filling in this way, most of the gas generated by the molding resin 4 is focused on the molding space 93 for resin discharge. Even in the case where welds occur, the weld generation location moves into the resin discharge molding space 93. The flow direction of the molding resin 4 filled in the molding space 83 at the time of filling the molding resin 4 described above is the same as the flow direction F1 described in the first embodiment (see FIG. 12).

  After filling the molding space 83 with the molding resin in this way, the molding resin 4 in a molten state is cooled and solidified. Thereafter, as shown in FIG. 21, the clamping of the first mold 71 and the second mold 72 is released, and the respective ejector pins 24 are projected to release the simultaneous injection-molded decorative product 80. The Each decorative layer 50 in the decorative film 5 is peeled off from the base sheet 51 and fixed to the surface of the simultaneous injection-molded decorative product 80 that has been in contact with the decorative film 5. Thereby, the decoration with respect to the injection-molding simultaneous decoration 80 is performed.

  Thereafter, the injection-molded simultaneous decorative article 80 is cut into a respective product molded part and an outer frame molded part as in the first embodiment, and each product molded part is obtained as a product. .

  According to the second embodiment, when the molding resin 4 is injected into the molding space 83, the molding space 83 is in an opened state, and after being filled with the molding resin 4, it is in an opened state. The first mold 71 and the second mold 72 are clamped so that the molding space 83 is sealed and the volume of the molding space 83 is reduced. It can be compressed and spread to every corner of the molding space 83. Such an effect is particularly effective when the molding space 83 is a thin space and has difficulty in injecting the molding resin 4 in a uniform state. Moreover, since the molding resin 4 can be compressed, a high-density molded product can be formed. For example, the manufacturing method in the case where the injection-molded simultaneous decorating product 80 is an optical system component such as an optical lens. Suitable as

  In the second embodiment, the molding resin 4 is injected with the first mold 71 and the second mold 72 maintaining a predetermined distance and the molding space 83 opened, and then the first mold 71 is injected. The injection compression molding has been described in which the mold 71 and the second mold 72 are clamped to reduce the volume of the molding space 83 and sealed, but the injection compression molding is limited to such a case. It is not a thing. Instead of such a case, for example, as a configuration in which a part of the first mold can be moved, a hermetically sealed molding space is formed with the first mold and the second mold being clamped. After that, the molding resin is injected, and then the filled mold resin is compressed by reducing the volume of the molding space by moving a part of the first mold. May be.

(Example of molding space)
Next, various examples of the arrangement of the molding space portion formed by the first mold and the decorative film described in the respective embodiments of the present invention will be described with reference to a space arrangement diagram.

Example 1: A space layout diagram (schematic plan view) of the molding space 120 according to Example 1 is shown in FIG. As shown in FIG. 23, the molding space 120 is formed by one product molding space 121, a resin injection molding space 122, and a resin discharge molding space 123. Specifically, a resin injection molding having a substantially triangular space shape in plan so as to be adjacent to and communicated with the lower end portion of the product molding space 121 that is a substantially rectangular space in plan view. While the space part 122 is arrange | positioned, the molding space part 123 for resin discharge is arrange | positioned so that the remaining three edge part of the product molding space part 121 may adjoin and communicate. Further, a gate portion 124 is disposed in the vicinity of the lower portion of the resin injection molding space 122 in the figure.

  Since the molding space 120 has such a configuration, the molding resin injected from the gate portion 124 into the resin injection molding space 122 is shown in FIG. 23 in the molding resin flow direction F3. The resin filling molding space 122 is filled while spreading radially from the gate portion 124 toward the adjacent product molding space 121. Further, the molding resin filled in the resin injection molding space 122 flows into the product molding space 121 and fills the product molding space 121. Thereafter, a part of the filled molding resin flows from the product molding space 121 to the resin discharging molding space 123, and the entire molding space 120 is filled with the molding resin.

  According to the first embodiment, in the molding space portion 120, the generated resin can be collected in the resin discharge molding space portion 123 while spreading the molding resin in a radial manner. Does not occur. Further, since the gate portion 124 is arranged in the resin injection molding space portion 122, the product molding space portion 121 to be decorated can be arranged away from the gate portion 124, and the high pressure from the gate portion 124. Therefore, it is possible to prevent the decorative layer from being broken (for example, ink flow) due to the injection of the molding resin, and to perform reliable decoration. Moreover, since the trace of the gate part 124 does not remain on the surface of the molded product formed in the product molding space 121, for example, it occupies substantially the entire molded product formed by the product molding space 121. The transparent window portion 121a for visual recognition can be formed.

Example 2 Next, FIG. 24 shows a space layout of the molding space 140 according to Example 2. FIG. As shown in FIG. 24, the molding space portion 140 is disposed between two product molding space portions 141 arranged side by side and each product molding space portion 141, adjacent to each product molding space portion 141, and Except for the resin injection molding space 142 and the portion where the resin injection molding space 142 is arranged, the resin injection molding space 142 is adjacent and connected so as to surround each product molding space 141. The two resin discharge molding spaces 143 are formed. In addition, a gate portion 144 is disposed in the vicinity of the substantially center of the resin injection molding space 142.

  With the molding space 140 having such a configuration, the molding resin injected into the resin injection molding space 142 from the gate portion 144 spreads substantially radially from the gate portion 144 while being molded into the resin injection molding. The space 142 is filled. Further, the molding resin filled in the resin injection molding space 142 flows into each product molding space 141 and is filled in each product molding space 141. Thereafter, a part of the filled molding resin flows from each product molding space 141 to each resin discharging molding space 143, and the entire molding space 140 is filled with the molding resin (FIG. 24 (see the flow direction F5 of the molding resin shown in FIG. 24).

  According to the second embodiment, the same effect as that of the first embodiment can be obtained, and only one gate portion 144 is provided although two product molding space portions 141 are arranged. The sprue runner which is the injection path | route of the molding resin to the gate part 144 can be simplified. Thereby, the amount of molding resin remaining on the sprue runner can be reduced. Moreover, since the trace of the gate part 144 does not remain on the surface of the molded product formed in each product molding space 141, for example, substantially the entire molded product formed by each product molding space 141. The transparent window portion 141a for visual recognition can be formed so as to occupy.

Example 3: In addition, the arrangement configuration of the molding space portions according to the respective examples as described above is not limited to the number of product molding space portions, and a case where a larger number of product molding space portions are provided. It can also be applied to. For example, a space layout diagram of the molding space 210 according to the third embodiment is shown in FIG.

  As shown in FIG. 25, even when six product forming space portions 211 are provided, forming space portions having the effects of the respective embodiments can be formed.

(Form of molded product)
Next, regarding various examples of the injection-molded simultaneous decorative article formed by the manufacturing method of each embodiment as described above, the injection-molded simultaneous decorative article shown in FIGS. 26A, 26B, 26C, and 26D. This will be described with reference to a schematic diagram.

  First, the simultaneous injection molded decorative article 301 shown in FIG. 26A is a molded article that does not include a transparent window portion. For example, there are molded parts such as automobile parts, home appliances, building materials, and household goods that do not want to leave marks such as welds and resin burns on the surface, and other general molded articles.

  Next, the injection-molded simultaneous decorating product 302 shown in FIG. 26B is a molded product in which the transparent window portion 302a is formed over substantially the entire molded product. Such a transparent portion 302a is generally formed for visual recognition, and is a portion that does not want to leave marks such as welds or resin burns on the surface and inside thereof, and is also characterized as a thin portion. have. Examples of such an injection-molded simultaneous decorating item 302 include an information display window portion of a portable information terminal such as a mobile phone and a display portion such as a personal computer and a small television.

  Next, the simultaneous injection-molded decorative product 303 shown in FIG. 26C is a molded product in which the transparent window portion 303a is formed on a very small part of the molded product. Such a transparent portion 303a is generally formed for visual recognition, and is a portion that does not want to leave marks such as welds or resin burns on the surface and inside thereof, and is also characterized as a thin portion. have. As such an injection-molded simultaneous decorating product 303, for example, there is an input panel portion such as an electric appliance (rice cooker, washing machine, etc.).

  Next, the simultaneous injection-molded decorative article 304 shown in FIG. 26D is a molded article that is formed entirely as a transparent window portion. Such an injection-molded simultaneous decoration 304 includes an optical product such as a lens.

(Form of partition convex part)
Next, various embodiments of the partition convex portion 23 formed in the second molds 2 and 72 used in the respective embodiments will be described.

  In the second mold 2 of the first embodiment shown in FIG. 7, the case has been described in which the respective partition convex portions 23 are arranged so as to surround the entire periphery of each product molding space portion 31. The arrangement of the protrusions 23 is not limited to such a case, and various other arrangements can be employed.

  For example, as shown in FIG. 27, each partition convex portion 351 is arranged so as to surround the periphery of each product molding space portion 31 but is not arranged only at the corner portion of each product molding space portion 31. It may be formed.

  Moreover, as shown in FIG. 28, although it arrange | positions so that the circumference | surroundings of each product shaping | molding space part 31 may be substantially enclosed, the convex-shaped protruding part formed continuously, the protruding part formed intermittently, May be combined to form the respective partition projections 352.

  Moreover, as shown in FIG. 29, the case where each partition convex part 353 is formed so that the circumference | surroundings of each product molding space part 31 may be enclosed by the substantially circular discontinuous protruding part may be sufficient. .

  Moreover, as shown in FIG. 30, each partition convex part 354 is formed so that each product formation space part 31 may be enclosed twice, and the arrangement pattern of each said 2nd protruding part may differ. Such a case may be used.

  Furthermore, as shown in FIG. 31, the case where each partition convex part 355 is formed so that the width | variety of a protruding part changes with places may be sufficient.

  In particular, since the ease of loosening of the decorative film 5 may vary slightly depending on the shape and location of the molded product, the decorative film can be obtained by changing the shape of the partition projections according to the shape of the molded product. The occurrence of slack in 5 can be prevented. Further, when wrinkles and slack are likely to occur, they can be dealt with by continuously arranging them in two rows and increasing the width of the raised portions. In addition, when such wrinkles and slack are unlikely to occur, they can be formed in a single row, or the partition convex portions themselves can be omitted.

(Suction pin arrangement)
Next, variations of various arrangement forms of the respective suction pins 25 formed in the second molds 2 and 72 in the respective embodiments will be described.

  For example, as shown in FIG. 32, the suction pins 25 can be arranged in the four corner portions and near the center of each side inside the partition convex portion 23.

  Further, as shown in FIG. 33, a large number of suction pins 25 can be arranged so as to be arranged substantially uniformly in the area between the product molding space 31 inside the partition convex part 23.

  Further, as shown in FIG. 34, when the partition convex portion 23 does not exist, the respective suction pins 25 can be evenly arranged in the vicinity of the outer periphery of the product molding space portion 31.

  In addition, as shown in FIG. 35, when the area between the inner periphery of the partition convex portion 23 and the outer periphery of the product molding space portion 31 is large, the vicinity of the partition convex portion 23 and the product molding space By arranging the suction pin 25 in the vicinity of the portion 31, the decorative film 5 can be reliably held.

  In such a case, as shown in FIG. 36, the suction pins 25 may be provided on the inner peripheral side and the outer peripheral side of the four corner portions of the partition convex portion 23, respectively.

  In particular, the followability of the decorative film 5 to the second mold 2 may vary depending on the location, but it is necessary to prevent wrinkles and slack in the product molding space 31. Since the followability of the decorative film 5 to the mold becomes worse in the vicinity of the partition convex portion 23 and in the corner portion, it is desirable to provide the suction pin 25 in such a portion. Moreover, it is preferable to install each suction pin 25 in the vicinity of the product molding space 31 which is a target portion for which generation of wrinkles or the like is to be prevented.

(Arrangement mode of tension groove)
Next, various arrangement forms of the tension grooves 15 formed in the peripheral portions of the respective molds 1, 2, 71, 72 in the respective embodiments will be described.

  For example, instead of being formed on the entire circumference of the mold, as shown in FIG. 37, the tension grooves 15 arranged along the vertical direction in the figure, which is the feeding direction of the decorative film 5, are continuously formed. It may be a case where the tension grooves 15 formed and disposed along the width direction of the decorative film 5 which is a direction perpendicular to the feeding direction are formed discontinuously.

  Moreover, as shown in FIG. 38, the width | variety of the tension | tensile_strength groove 15 can also be changed with the feed direction and width direction of the decorating film 5. FIG. For example, the tension groove 15 arranged along the feeding direction is formed with a width larger than the width of the tension groove 15 arranged along the width direction, and is formed in the vicinity of the molding space portion 3, and the width direction The tension grooves 15 arranged along the side can be formed slightly apart from the molding space 3. Further, as shown in FIG. 39, the four corner portions of the tension groove 15 shown in FIG. 38 can be deformed into a circular shape.

  The slack of the decorative film 5 differs depending on the feeding direction and the width direction in which the decorative film 5 is tensioned, and also depending on the shape of the molded product, the thickness and shape of the tension groove 15, and the distance to the molding space 3 Different. Therefore, by adopting such an arrangement mode of the tension grooves 15, it is possible to select the optimum mode of the tension grooves 15 according to the respective slack situations and to prevent the slack as much as possible. Moreover, the arrangement | positioning aspect of the tension | tensile_strength groove | channel 15 is not restricted only to the above cases, The case where only 2 rows are provided, or the case where it does not form may be sufficient.

  It is to be noted that, by appropriately combining any of the various embodiments, the effects possessed by them can be produced.

  Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

It is a schematic cross section which shows the manufacturing method of the injection molding simultaneous decorating product concerning 1st Embodiment of this invention, and shows the state before injection | pouring of molding resin. It is a schematic cross section which shows the injection | pouring state of molding resin in the manufacturing method of the injection-molding simultaneous decorations of 1st Embodiment. It is a schematic cross section which shows the state with which the molding resin was filled in the manufacturing method of the injection-molding simultaneous decorations of 1st Embodiment. It is a schematic cross section which shows the state by which a molded article is released in the manufacturing method of the injection-molding simultaneous decorating article of 1st Embodiment. It is a schematic plan view of the 1st metal mold | die of 1st Embodiment. 6A, FIG. 6B, FIG. 6C and FIG. 6D are schematic cross-sectional views in the first mold of FIG. 5, FIG. 6A is a cross-sectional view along the line BB, and FIG. 6B is a cross-sectional view along the line DD. 6C is a cross-sectional view taken along the line CC, and FIG. 6D is a cross-sectional view taken along the line EE. It is a schematic plan view of the 2nd metal mold | die of 1st Embodiment. 8A and 8B are schematic cross-sectional views of the second mold of FIG. 7, FIG. 8A is a cross-sectional view taken along line FF, and FIG. 8B is a cross-sectional view taken along line GG. It is a space plane arrangement | positioning figure of the shaping | molding space part in 1st Embodiment. FIG. 10 is a space layout diagram taken along line AA in FIG. 9. 11A and 11B are partially enlarged cross-sectional views showing the tension groove in the first embodiment, FIG. 11A shows a state before the engaging member is engaged, and FIG. 11B shows that the engaging member is engaged. Indicates the state. It is a space arrangement | positioning figure which shows the flow direction of the molding resin in the shaping | molding space part of 1st Embodiment. It is a schematic plan view of the injection-molding simultaneous decorating product of 1st Embodiment. It is a schematic plan view of the outer frame molded product part of the first embodiment. It is a model top view of each product molded product part of 1st Embodiment. It is a schematic cross section which shows the structure of the decorating film of 1st Embodiment. It is a schematic cross section of the decorating film concerning another example of 1st Embodiment. It is a schematic cross section which shows the manufacturing method of the injection molding simultaneous decorating product (injection compression molding simultaneous decorating product) concerning 2nd Embodiment of this invention, and shows the state before injection | pouring of molding resin. It is a schematic cross section which shows the injection | pouring state of molding resin in the manufacturing method of the injection-molding simultaneous decorating product of 2nd Embodiment. It is a schematic cross section which shows the state compressed and filled with the molding resin in the manufacturing method of the injection-molding simultaneous decorating product of 2nd Embodiment. It is a schematic cross section which shows the state by which a molded article is released in the manufacturing method of the injection-molding simultaneous decorating product of 2nd Embodiment. It is a schematic plan view of the 1st metal mold | die of 2nd Embodiment. FIG. 3 is a space layout diagram of a molding space according to the first embodiment. FIG. 6 is a space layout diagram of a molding space portion according to Example 2. FIG. 6 is a space layout diagram of molding space portions according to Example 3; FIG. 26A, FIG. 26B, FIG. 26C, and FIG. 26D are schematic plan views of the injection-molded simultaneous decorative article in each embodiment, FIG. 26A is a molded article that does not have a transparent window portion, and FIG. 26C is a molded product having a transparent window portion in a part thereof, and FIG. 26D is a molded product formed entirely transparent. It is a schematic plan view which shows an example of the form of the partition convex part concerning each embodiment. It is a schematic plan view which shows another example of the form of a partition convex part. It is a schematic plan view which shows another example of the form of a partition convex part. It is a schematic plan view which shows another example of the form of a partition convex part. It is a schematic plan view which shows another example of the form of a partition convex part. It is a schematic plan view which shows an example of the arrangement | positioning aspect of the suction pin concerning each embodiment. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a suction pin. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a suction pin. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a suction pin. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a suction pin. It is a schematic plan view which shows an example of the arrangement | positioning aspect of the tension groove concerning each embodiment. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a tension groove. It is a schematic plan view which shows another example of the arrangement | positioning aspect of a tension groove. 40A and 40B are diagrams showing a conventional method of manufacturing an injection molded product, FIG. 40A is a sectional view of a mold, and FIG. 40B is a diagram showing a flow direction of a molding resin in the mold. It is a figure which shows the state which the weld produced in the conventional injection molded product. It is a figure which shows the state which the resin burn produced in the conventional injection molded product.

Explanation of symbols

1 1st mold (A mold)
DESCRIPTION OF SYMBOLS 10 Injection molding simultaneous decoration 11 Reference surface 12 Recess 14 Gate part 15 Stretch groove 16 Engaging member 19 Air vent pin 120 Molding space part 121 Product molding space part 122 Resin injection molding space part 123 Resin discharge molding space part 140 Molding space Part 141 Product molding space part 141a Transparent window part 142 Resin injection molding space part 143 Resin discharge molding space part 144 Gate part 2 Second mold (B mold)
20 Air vent hole 21 Reference surface 22 Recess 23 Protrusion 24 Ejector pin 25 Suction pin 26 Suction convex 210 Molding space 211 Product molding space 3 Molding space 30 Product molded product 31 Product molding space 32 Molding space for resin injection Portion 33 Resin discharging molding space 301 Injection molding simultaneous decoration 302 Injection molding simultaneous decoration 302a Transparent window portion 303 Injection molding simultaneous decoration 303a Transparent window portion 304 Injection molding simultaneous decoration 351 Partition convex portion 352 Partition convex portion 353 Partition Convex part 354 Partition convex part 355 Partition convex part 4 Resin (molding resin)
40 Outer frame molded part 42 Injection space molded part 43 Discharged space molded part 5 Decorating film 50 Decorating layer 51 Base sheet 52 Picture layer 53 Adhesive layer 54 Peeling layer 55 Release layer 501 First mold 502 Second mold 503 Molding space section 504 Auxiliary space section 505 Resin molded product 505a Resin molding section 505b Illustrated 514 Gate section 551 Weld 552 Resin burn 71 First mold 72 Second mold 77 Mold touch sensor 80 Simultaneous injection molding Decoration 81 Product molding space 83 Molding space 91 Product molding space 92 Molding space for resin injection 93 Molding space for resin discharge F1 Flow direction F3 Flow direction F5 Flow direction F12 Flow direction

Claims (6)

A decorative film (5) is arranged between the first mold (1, 71) and the second mold (2, 72) arranged to face each other, and the decorative film and the first mold Injection molding simultaneous decorating product for injecting molten molding resin (4) into the molding space portion (3) to be formed and solidifying the molding resin filled in the molding space portion to obtain an injection molding simultaneous decorating product (10) In the manufacturing method of
The first mold is provided with a gate portion (14) for injecting the molding resin (4), and the molding space portion is formed in communication with the gate portion into which the molding resin injected from the gate portion flows. Molding of the resin injection molding space (32) and the molding resin flowing into the resin injection molding space formed adjacent to the resin injection molding space flowing from the resin injection molding space Molding space for resin discharge formed adjacent to the product molding space where a part of the molding resin filled in the space (31) and the product molding space is discharged from the product molding space and flows in. Part (33),
The boundary portions of the resin injection molding space, the product molding space, and the resin discharge molding space communicate with each other without being partitioned from each other, and the injected molding resin is centered on the gate portion. The product flows into the product molding space from the resin injection molding space while filling the resin injection molding space and filling the resin injection molding space while maintaining the substantially radial expansion from the gate. The molding space is filled, and flows into the resin discharge molding space so as to be discharged from the product molding space to fill the entire molding space. Thereafter, the molding resin is solidified and the surface of the molding resin is added to the molding space. A method for producing an injection-molded and simultaneously decorated product, characterized by decorating with a decorative film to obtain a simultaneously decorated product by injection molding.   A state in which the molding space is sealed by clamping the first mold and the second mold in a state where the decorative film is disposed between the first mold (1) and the second mold (2). 3. The injection-molded decorative product according to claim 1, wherein after the molding resin is injected and the molding space is filled with the molding resin, the molding resin is compressed by reducing the volume of the molding space. Method.   A state in which the molding space is opened by placing the first mold and the second mold close to each other with the decorative film disposed between the first mold (71) and the second mold (72). 3. The injection molding according to claim 1, wherein injection of molding resin is performed, and thereafter the first mold and the second mold are clamped to reduce the volume of the molding space to compress the filled molding resin. Manufacturing method of simultaneous decorations. A decorative film (5) is arranged between the first mold (1, 71) and the second mold (2, 72) arranged to face each other, and the decorative film and the first mold The molten molding resin (4) is injected into the molding space (3) to be formed, the molding resin filled in the molding space is solidified, and the surface of the molding resin is decorated with the decorative film. In the mold for simultaneous injection molding decoration to obtain the injection molding simultaneous decoration product (10),
The first mold is provided with a gate portion (14) for injecting the molding resin (4), and the molding space portion is formed in communication with the gate portion into which the molding resin injected from the gate portion flows. Molding of the resin injection molding space (32) and the molding resin flowing into the resin injection molding space formed adjacent to the resin injection molding space flowing from the resin injection molding space Molding for resin discharge formed adjacent to the product molding space where a part of the molding resin filled in the space (31) and the product molding space is discharged from the product molding space. A space (33),
The boundary portions of the resin injection molding space, the product molding space, and the resin discharge molding space communicate with each other without being partitioned from each other, and the injected molding resin is centered on the gate portion. The product flows into the product molding space from the resin injection molding space while filling the resin injection molding space and filling the resin injection molding space while maintaining the substantially radial expansion from the gate. A mold for simultaneous injection molding, which is filled into a molding space and flows into the resin discharge molding space so as to be discharged from the product molding space and is filled into the entire molding space.   A substantially convex raised film holding part (23) is provided on the surface of the second mold forming the resin discharge molding space part to remove and hold the slack of the decorative film adhered to the surface. Item 5. A mold for simultaneous injection molding of item 4. The molding space has a square shape, the average cross-sectional area S1 (mm ² ) of the product molding space, the average thickness T1 (mm) of the product molding space, and the average cross-sectional area S2 (mm ² ) of the outer frame molding space. The mold for simultaneous injection-molding decoration according to claim 4 or 5, wherein the average thickness T2 (mm) of the outer frame molding space is in a relationship of S1≥4xS2 and T1≥T2.

Images