JP5334502B2 - Mold equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a time required to vacuum suction of a film forming chamber, when a workpiece is film formed using a first mold for supporting the workpiece to be film formed in a mold surface for injection molding, and a second mold provided with the film forming chamber to be vacuum suctioned. <P>SOLUTION: A communicating hole 11 for communicating clearances S1 and S2 from a mold surface 2a formed in a first mold 2 to an inside of a core 2b with an inside of a film forming chamber 3b of a second mold 3 from the inside of the core 2b, is formed in the first mold 2. The mold equipment is composed so that the clearances S1 and S2 are vacuum suctioned through the communicating hole 11 when the film forming chamber 3b is vacuum suctioned. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention belongs to the technical field of a mold apparatus for depositing an injection molded workpiece.

In general, a metal film serving as a reflective surface is formed on an injection-molded molded body like parts that make up vehicle lamps such as front lamps, blinkers, and tail lamps, thereby increasing the amount of light and ensuring a wide irradiation range. There is something that you can do. In the case of forming a film by injection molding in this way, conventionally, after removing the molded body from the mold and moving and setting a number of the extracted film bodies to the film forming chamber, a vacuum evaporation apparatus or the like is formed. Film formation was performed using a film means. However, this method has a problem that the injection molding and the film formation cannot be performed in a series of steps and the working efficiency is inferior.
Therefore, a film forming mold comprising a first mold in which a work to be formed is incorporated and a second mold in which film forming means for forming a film on the work is incorporated has been proposed. (For example, refer to Patent Document 1). In this case, injection molding is performed using the first mold and the second mold, and the second mold is supported while the work is supported on the mold surface of the first mold used for the injection molding. The concave portion formed in the step is used as a film forming chamber (film forming chamber) so that film formation can be performed, whereby injection molding and film formation can be performed in a series of steps.
Japanese Patent No. 3670733

By the way, in general, an injection mold is provided with an ejector for detaching the workpiece from the mold. For example, when ejecting the workpiece, the tip of the ejector is separated from the mold surface. It is movably inserted in an ejector insertion hole formed in the core so that it can protrude. In such a case, even during non-demolding, a minute gap allowing the movement of the ejector is formed between the ejector and the inner surface of the ejector insertion hole in a state extending from the mold surface to the inside of the core. ing.
Further, in some molds for injection molding, in order to form a workpiece having an elongated rib or a workpiece having a complicated shape, a nesting or a core forming a part of the mold surface may be incorporated in the core. In this case, a minute gap necessary for assembling the nest or core is formed between the nest or core and the core in a state extending from the mold surface to the inside of the core.
Thus, in the injection mold, a minute gap from the mold surface to the inside of the core is formed by the ejector, or the insert or the core. The gap is formed by the ejector, the insert or the middle. The larger the number of children, the more they are formed.
On the other hand, as in the above-mentioned Patent Document 1, a vacuum deposition apparatus or the like is used in which the recess formed in the second mold is used as a film forming chamber in a state where the workpiece molded on the mold surface of the first mold is supported. When film formation is performed by the film formation means, the film formation chamber is evacuated. At this time, the gap between the ejector and the inner surface of the ejector-like insertion hole, or between the insert or core and the core is used. Like this gap, the air in the gap from the mold surface formed in the first mold to the inside of the core also flows out from the mold surface side and is evacuated. However, since the mold surface of the first mold is covered with the work supported by the mold surface, the air in the gap is prevented from quickly flowing out from the mold surface side. Thus, the air in the gap portion gradually flows into the film forming chamber while being blocked by the workpiece, and there is a problem that it takes time to evacuate the film forming chamber. There is a problem.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 includes a mold surface for injection molding, and a film is formed on the mold surface. A film forming chamber for incorporating a first mold for supporting the workpiece to be formed and a film forming means for forming a film supported on the mold surface of the first mold, and evacuating the film during the film forming process; When the mold apparatus is configured using the second mold provided, the first mold is provided with a gap from the mold surface formed in the first mold to the core, and the core from the core inside. to form a communication hole which allowed to communicate with the outside, it is a feature and be Rukin type device that it has the gap portion through the communication hole during the film formation step to the structure evacuated.
In the invention according to claim 2, the first mold has a structure in which a nest and a core forming a part of the mold surface are incorporated in the core, and the mold surface formed in the first mold moves into the core. 2. The mold apparatus according to claim 1, wherein the reaching gap is a gap between the insert or the core and the core.
According to a third aspect of the present invention, the first mold includes an ejector for removing the film-formed workpiece from the mold surface of the first mold, and the core is formed from the mold surface formed on the first mold. gap portion leading to the inside is a mold apparatus according to claim 1, wherein the ejector is a gap between the insertion hole inner surface and ejector ejector is inserted movably.
According to the invention of claim 4, the first mold and the second mold are closed in the film forming step, and the outlet on the core outer side of the communication hole of the first mold is in the film forming chamber of the second mold. 4. The mold apparatus according to claim 1, wherein the gap portion is evacuated through the communication hole when the film forming chamber is evacuated. 5. is there.

According to the first aspect of the present invention, the gap from the mold surface formed in the first mold to the inside of the core is quickly evacuated through the communication hole that communicates the gap from the inside of the core to the outside of the core. As a result, the time required for evacuation can be greatly shortened, which can greatly contribute to the improvement of production efficiency.
According to the second aspect of the present invention, even if a gap from the mold surface to the inside of the core is formed between the insert or the core and the core, the first mold can be evacuated quickly.
According to the invention of claim 3, even if a gap from the die surface to the inside of the core is formed between the ejector insertion hole inner surface and the ejector in the first mold, it can be evacuated quickly. .
According to the invention of claim 4, as the film forming chamber is evacuated, the gap from the mold surface formed in the first mold to the inside of the core is also quickly evacuated through the communication hole. As a result, a pump and piping for evacuating the gap are not required separately, which can contribute to cost reduction.

Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, 1 is a mold apparatus for performing injection molding and film formation, 2 and 3 are first and second molds constituting the mold apparatus 1, and in this embodiment, the first mold 2 Is a movable mold, the second mold 3 is a fixed mold, and the first mold 2 which is a movable mold is opposed to the second mold 3 which is a fixed mold. While being able to move apart, it is configured to be slidable in the direction along the surface with respect to the second mold 3 while being separated from the second mold 3. The moving mechanism of the first mold 2 can adopt a technique used in conventional die slide injection, and the description thereof is omitted.
In the present embodiment, the first mold 2 is a movable mold and the second mold 3 is a fixed mold. However, the present invention is not limited to this, and the first mold is a fixed mold, The mold may be a movable mold, or both the first and second molds can be moved. Furthermore, the slide movement of the mold is not limited to the linear movement as long as it is a movement in the direction along the surface, but may be a rotational movement around the axis.

  On the other hand, 4 is a workpiece which is a component part of a vehicle lamp, and the workpiece 4 is injection-molded by a mold apparatus 1 configured using the first and second molds 2 and 3. A metal film to be the reflective surface 4a is formed.

  In other words, the first mold 2 is formed with a convex mold surface 2a that forms a cavity for injection molding on the side facing the second mold 3, while the second mold 3 On the side facing the first mold 2, there are a concave mold surface 3 a that forms a cavity for injection molding, and a film formation chamber 3 b in which a sputtering apparatus 5 for forming the injection-molded work 4 is formed. Is formed. Then, as will be described later, after the mold surface 2a of the first mold 2 and the mold surface 3a of the second mold 3 are matched with each other and the workpiece 4 is injection-molded, the mold surface 2a of the first mold 2 is formed. The first mold 2 is slid while the work 4 is supported, and then the work 4 supported on the mold surface 2a of the first mold 2 is moved into the film forming chamber 3b of the second mold 3. The workpiece 4 is deposited by the sputtering apparatus 5.

  Here, the injection-molded work 4 has a plurality of ribs 4b on the surface part which is the back side with respect to the reflecting surface 4a. These ribs 4b are formed on the mold surface 2a of the first mold 2. It is configured to be molded by a plurality of mold surface forming inserts 6 forming a part.

  The mold surface forming nest 6 is incorporated in a nest incorporation hole 2c formed in the core 2b of the first mold 2. The nest incorporation hole 2c extends from the mold surface 2a to the mold surface 2a. Is formed so as to reach the groove portion 7a of the seal insert 7 fitted in the recess 2d provided in the core surface portion on the opposite side. The mold surface forming nest 6 is incorporated into the nest assembling hole 2c from the recessed portion 2d side, and the tip portion projects from the nest assembling hole 2c to form a part of the mold surface 2a. The base end of the insert 6 is supported by the groove 7a of the seal insert 7. In this case, there is a mold between the mold surface forming insert 6 and the inner surface of the insert incorporating hole 2c. A minute gap S1 necessary for assembling the surface forming insert 6 is formed in a state extending from the mold surface 2a to the inside of the core 2b. Reference numeral 8 denotes a seal member that seals between the seal insert 7 and the inner surface of the recess 2d. By the seal member 8, the gap S1 is airtight with respect to the outside on the opposite side of the mold surface 2a. Blocked.

  The first mold 2 is provided with a plurality of ejector pins 9 for detaching the film-formed workpiece 4 from the mold surface 2a of the first mold 2, and the ejector pins 9 are movable. The ejector insertion hole 2e that is inserted into the die 2 is formed so as to penetrate the seal insert 7 from the mold surface 2a to the opposite side of the mold surface 2a. The ejector pin 9 has a non-demounting posture in which the tip of the pin is substantially flush with the mold surface 2a based on the operation of the ejector moving means (not shown), and the tip of the pin protrudes from the mold surface 2a. In this case, there is a small gap S2 that allows the movement of the ejector pin 9 between the ejector pin 9 and the inner surface of the ejector insertion hole 2e. The mold surface 2a is formed so as to reach the opposite side of the mold surface 2a through the core 2b. Reference numeral 10 denotes a seal member that seals between the ejector pin 9 and the opposite end portion of the ejector insertion hole 2e. The seal member 10 causes the gap S2 to be opposite to the mold surface 2a. Is sealed off from the outside in an airtight manner.

  Further, the first mold 2 includes a gap S1 between the mold surface forming insert 6 and the inner surface of the insert insertion hole 2c, and a gap S2 between the ejector pin 9 and the ejector insertion hole 2e. A communication hole 11 is formed to communicate from the inside of 2b to the outside of the core 2b. The core outer side outlet 11a of the communication hole 11 communicates with the film forming chamber 3b of the second mold 3 when the first mold 2 and the second mold 3 are closed in the film forming process described later. Thus, the communication holes 11 allow the gaps S1 and S2 to be communicated from the inside of the core 2b into the film forming chamber 3b of the second mold 3. ing.

  On the other hand, the film forming chamber 3b is formed in the second mold 3 as described above, and the film forming chamber 3b is a concavo-convex recess having an opening on the side facing the first mold 2. As described above, the sputtering apparatus 5 is incorporated in the film forming chamber 3b. The sputtering apparatus 5 corresponds to the film forming means of the present invention. In this embodiment, the magnetron type sputtering apparatus 5 is used. The magnetron type sputtering apparatus 5 is a general-purpose device and will not be described in detail. However, the magnet 11 and the target 12 disposed on the ceiling of the film forming chamber 3b and the outside of the film forming chamber 3b are installed. Various member devices such as a vacuum pump 13, an intake passage 14 formed so as to penetrate inside and outside of the film forming chamber 3b, an inert gas supply passage (not shown), and the like are provided. The film forming means is not limited to this, and film forming means such as various sputtering apparatuses and vacuum vapor deposition apparatuses can be appropriately employed.

  When the film of the workpiece 4 is formed, as shown in FIG. 5, the workpiece 4 and the target 12 are placed in a state where the injection molded workpiece 4 is supported on the mold surface 2a of the first mold 2. The first mold 2 and the second mold 3 are closed so as to face each other, but the mold surface of the first mold 2 is placed in the film forming chamber 3b of the second mold 3 in the closed state. The work 4 supported by 2a is arranged, and as described above, the core outside outlet 11a of the communication hole 11 formed in the first mold 2 is designed to communicate with the film forming chamber 3b. Thus, the gaps S1 and S2 can be communicated with the film forming chamber 3b from the inside of the core 2b.

Next, the steps of injection molding and film formation of the workpiece 4 by the mold apparatus 1 will be described with reference to FIGS.
First, in FIG. 2, the 1st metal mold | die 2 and the 2nd metal mold | die 3 are spaced apart in the state in which the mold surfaces 2a and 3a oppose each other (mold open state).

  As shown in FIG. 3, the mold surfaces 2a and 3a are matched with each other by moving the first mold 2 to the second mold 3 side and closing the mold as shown in FIG. A cavity into which the resin material is injected is formed between the mold surface 2 a of the mold 2 and the mold surface 3 a of the second mold 3. By injecting the resin material in this state, the workpiece 4 is injection molded (injection molding process). In this case, as described above, the rib 4 b is formed on the work 4 by the mold surface forming insert 6 incorporated in the first mold 2.

  Next, as shown in FIG. 4, the first mold 2 is separated from the second mold 3 with the injection-molded work 4 supported on the mold surface 2 a of the first mold 2 (die opening). Thereafter, the first mold 2 is slid so that the work 4 supported by the mold surface 2a faces the opening side of the film forming chamber 3b of the second mold 3.

  Further, as shown in FIG. 5, the work 4 supported on the mold surface 2 a of the first mold 2 is closed by moving the first mold 2 toward the second mold 3 and closing the mold. 3b. Then, with the mold closed, the vacuum pump 13 is operated to evacuate the film forming chamber 3b, and an inert gas is introduced into the film forming chamber 3b. As a result, the reflecting surface 4a is formed on the workpiece 4 (film formation step).

  Here, in the mold closed state in the film forming step, as described above, the gap S1 between the mold surface forming insert 6 of the first mold 2 and the inner surface of the insert mounting hole 2c, and the ejector pin 9 and the ejector The clearance S2 between the inner surfaces of the insertion holes 2e is communicated with the film formation chamber 3b from the inside of the core 2b through the communication holes 11. Thus, when the inside of the film forming chamber 3b is evacuated, the air in the gaps S1 and S2 is evacuated from the inside of the core 2b through the communication hole 11, and thereby the gaps S1 and S2 are evacuated. The air in S2 can be quickly evacuated.

  After completion of the film forming step, as shown in FIG. 6, the first die 2 is separated from the second die 3 (die opening), and the ejector moving means is operated to bring the ejector pin 9 into the demolding posture. Then, the workpiece 4 is detached from the mold surface 2a of the first mold 2. Thereafter, the work 4 is taken out from the mold apparatus 1, and the first mold 2 is slid again to the state shown in FIG. 2, and thereafter, the above-described steps are repeated, whereby the work 4 is injection-molded and formed. Can be performed sequentially.

  In the present embodiment configured as described, the first mold 2 is provided with a mold surface 2a for injection molding, and is very small from the mold surface 2a to the inside of the core 2b by the mold surface forming insert 6 and the ejector pin 9. Clear gaps S1 and S1 are formed. When the injection-molded work 4 is formed into a film, the work 4 is placed in the film forming chamber 3 b of the second mold 3 while being supported by the mold surface 2 a of the first mold 2. However, in this case, the first mold 2 is formed with a communication hole 11 for communicating the gaps S1 and S2 from the inside of the core 2b to the outside of the core 2b. The side outlet 11a communicates with the film forming chamber 3b. Therefore, when the film forming chamber 3b is evacuated, the air in the gaps S1 and S2 can be evacuated through the communication hole 11.

  As a result, gaps S1 and S2 from the mold surface 2a to the core interior 2b are formed by the mold surface forming insert 6 and the ejector pin 9 in the first mold 2 that supports the workpiece 4 formed on the mold surface 2a. However, when the film forming chamber 3b is evacuated, the air in the gaps S1 and S2 is quickly evacuated through the communication hole 11 without being obstructed by the work 4 supported by the mold surface 2a. Therefore, the time required for evacuation can be greatly reduced, which can greatly contribute to the improvement of production efficiency.

  Moreover, in the present embodiment, a configuration in which the core outside outlet 11a of the communication hole 11 communicates with the film forming chamber 3b with the first mold 2 and the second mold 3 being closed during the film forming process. Therefore, the gaps S1 and S2 are also evacuated through the communication hole 11 in accordance with the evacuation of the film forming chamber 3b. Thus, a pump and a pipe for evacuating the gaps S1 and S2 are evacuated. It is possible to contribute to cost reduction.

  Of course, the present invention is not limited to the above-described embodiment, and in the above-described embodiment, the mold surface forming insert 6 is used as a gap from the mold surface formed in the first mold to the inside of the core. The clearance S1 between the inner surface of the insertion hole 2c and the inner surface of the insertion hole 2c and the clearance S2 between the ejector pin 9 and the inner surface of the insertion hole 2e for the ejector are illustrated as an example. When the core forming the core is incorporated in the core, the present invention can of course be implemented even in the gap between the core and the core.

  Furthermore, in the above-described embodiment, as described above, the core outside outlet 11a of the communication hole 11 communicates with the film forming chamber 3b during the film forming process, whereby the film forming chamber 3b is evacuated. The gaps S1 and S2 are evacuated through the communication hole 11, but the present invention is not limited to this, and the communication hole 11 is formed in the first mold 2 as in the second embodiment shown in FIG. A vacuum pump 15 for evacuating the gaps S1 and S2 may be provided separately. Further, as in the third embodiment shown in FIG. 8, the communication hole 11 is connected to the vacuum pump 13 that evacuates the film forming chamber 3 b through the external pipe 16, and the vacuum pump 13 passes through the communication hole 11. The gaps S1 and S2 can be evacuated.

(A) is sectional drawing of the workpiece | work formed by a metal mold apparatus, (B) is a figure which shows a 1st metal mold | die. It is a figure which shows the die apparatus of the mold open state before an injection process. It is a figure which shows the metal mold apparatus in an injection molding process. It is a figure which shows the die apparatus of the mold open state after an injection molding process. It is a figure which shows the metal mold | die apparatus in a film-forming process. It is a figure which shows the die apparatus of the mold open state after a film-forming process. It is a figure which shows the metal mold apparatus of 2nd embodiment. It is a figure which shows the metal mold apparatus of 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold apparatus 2 First mold 2a Mold surface 2b Core 2e Ejector insertion hole 3 Second mold 3b Deposition chamber 4 Workpiece 5 Sputtering apparatus 6 Mold surface formation insert 9 Ejector pin 11 Communication hole 11a Core external side outlet S1, S2 gap

Claims (4)

A first mold that includes a mold surface for injection molding and supports a workpiece formed on the mold surface; and a film forming means for forming a workpiece supported on the mold surface of the first mold. In configuring a mold apparatus using a second mold having a film forming chamber that is incorporated and vacuumed during the film forming process, the mold formed on the first mold is formed on the first mold. the gap portion extending from the surface to the inner core, to form a communication hole which allowed to communicate from the core inner side core outside, you characterized in that the evacuating constituting the gap portion through the communication hole at the time of film formation process Mold equipment.   The first mold has a structure in which a nest and a core forming a part of the mold surface are incorporated in the core, and a gap from the mold surface formed in the first mold to the inside of the core The mold apparatus according to claim 1, wherein the mold apparatus is a gap between the core and the core. The first mold is provided with an ejector for demolding the film-formed workpiece from the mold surface of the first mold, and the gap from the mold surface formed in the first mold to the inside of the core is The mold apparatus according to claim 1, wherein the mold device is a gap between an ejector insertion hole inner surface through which the ejector is movably inserted and the ejector.   With the mold closed state of the first mold and the second mold during the film forming process, the core outside outlet of the communication hole of the first mold communicates with the film forming chamber of the second mold, The mold apparatus according to any one of claims 1 to 3, wherein the gap portion is evacuated through the communication hole in accordance with evacuation of the film forming chamber.

Images