JP5044232B2 - Film forming equipment - Google Patents

Description

  The present invention relates to a film forming apparatus.

Conventionally, when a film is formed on the surface of a molded body using a film forming means such as vacuum deposition, the molded body is once removed from the mold and set in a film forming chamber, and then a vacuum pump is used. The film formation chamber is brought into a vacuum state by suction, and the film is formed in this atmosphere. In such a film formation method, not only is it necessary to carry in and out of the molded body, but also dust adheres to the film formation surface, and good film formation does not occur due to hand contact, resulting in a defective product. There is a problem of end.
Therefore, an in-mold forming film forming apparatus is known that forms a film in a state where the molded body is held in a mold (see, for example, Patent Document 1). With this in-mold molding film forming device, it is possible to perform film formation in the course of a series of mold movements without taking out the molded body from the mold every time, thereby dramatically increasing the production efficiency of the film forming molded body. And the generation of defective products can be reduced as much as possible.
Japanese Patent No. 3688289

  By the way, in the in-mold forming film forming apparatus of Patent Document 1 described above, in the film forming process in the process of manufacturing the film forming molded body, the first mold (for example, movable mold) that holds the molded body, After the mold is evacuated using a vacuum pump with the second mold (for example, fixed mold) provided with the film means being clamped, the film is formed in a vacuum atmosphere. . As described above, when the inside of the mold is brought into a vacuum state, conventionally, the first and second molds are clamped to form a vacuum in a substantially complete contact state. Since it is necessary to suck air from a slight gap (mold matching portion), it takes time until the pressure in the mold reaches the degree of vacuum necessary for film formation, and there is a problem that workability is lowered.

  The present invention has been made in view of the above circumstances, and provides a film forming apparatus capable of forming a film without reducing workability.

In order to solve the above-described problems, the invention described in claim 1 is characterized in that an injection molding clamping position for injection molding a pair of molded bodies on a pair of molded molds and the molded body. A film-forming mold clamping position for film formation is set, and a mold-clamping device for moving the pair of molding dies to the injection molding mold clamping position and the film-forming mold clamping position is mounted. In the film forming apparatus in which the pair of molded bodies are configured to be integrally molded, the injection mold clamping position of the pair of molding dies is more predetermined than the film forming mold clamping position. The mold clamping device includes an arm portion that is configured by a link and connected to the one molding die, and the arm portion is linear or bent. The pair of molding dies is clamped by the injection molding. Location and moved to the film forming mold clamping position, characterized in that the direction of clamping force in the film mold clamping position than the clamping force of the injection molding mold clamping position is set smaller.
Further, the invention described in claim 2, wherein A over arm portion has one end is connected to be the first pin and the pivot connected to the body portion, the other end is connected to be the second pin and the pivot The first link, one end of which is pivotably connected to the second pin, the other end of which is pivotally connected to the third pin, and two rod-shaped members, One end is connected to the third pin, and each other end has a third link connected to the one mold.

The invention described in claim 3 is characterized in that a gap is formed on the clamping surface of the pair of molded body molds at the film forming mold clamping position.

The invention described in claim 4 is characterized in that an O-ring is interposed in the gap.

  According to the first aspect of the present invention, since the clamping force does not become maximum at the film forming mold clamping position, the first mold and the second mold are brought into a complete contact state at the time of mold clamping. There is an effect that can be prevented.

According to the third aspect of the present invention, when the inside of the mold is brought into a vacuum state, the air existing in the gap can be easily sucked, so that the inside of the mold can be brought into a vacuum state in a short time. There is an effect that can be done.

According to the invention described in claim 4 , since the gap formed between the pair of molded body molds is ensured, and at the same time, the outer space can be surely blocked by the O-ring. When the pressure is set to a vacuum state, it is possible to shorten the time until the degree of vacuum is reached, and there is an effect that film formation can be performed without reducing the working space.

Next, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a case where a vehicle side turn lamp is manufactured using a film forming apparatus will be described.
As shown in FIG. 1, the side turn lamp 1 includes a lens unit 2 and a housing 4 in which a light bulb 3 is incorporated. The lens unit 2 and the housing 4 are formed as a primary product, which is a half product, with a fixed mold and a movable mold, respectively, and after the movable mold is slid and the inner surface of the housing 4 is formed, the movable mold is slid. The two primary products are brought into contact with each other, and a resin material 5 to be described later is secondarily injected into the abutting surface portion to be integrally molded. In addition, the material which comprises the lens part 2 is a polycarbonate resin, and the material which comprises the housing 4 is an acrylic resin. The light bulb 3 may be an LED.

Next, the manufacturing apparatus 50 for forming the side turn lamp 1 into a film will be described.
As shown in FIG. 2, the manufacturing apparatus 50 includes a movable mold 51 and a fixed mold 52. Molding surfaces 53 and 54 for forming the lens portion 2 and the housing 4 are formed on the movable die 51, and molding for forming the lens portion 2 and the housing 4 is formed on the fixed die 52. A film forming mold surface 57 for accommodating the film forming apparatus 40 is formed together with the mold surfaces 55 and 56. These mold surfaces are removably attached to the mold base.

  Here, in the fixed mold 52, a mold clamping surface (molding position for injection molding) when the lens unit 2 and the housing 4 are molded by primary injection, and a mold clamping surface when a film is formed on the inner surface of the housing 4. A step is formed between the film forming mold clamping position and the injection molding mold clamping position a is offset to a position higher by the height h than the film forming mold clamping position b.

  Further, a recessed portion 58 is formed on the lower surface of the film forming mold surface 57 of the fixed mold 52 and on the periphery thereof, and a rubber O-ring 59 is attached to the recessed portion 58. The O-ring 59 has such a thickness that at least a part protrudes from the recessed portion 58.

  The film forming apparatus 40 is a known vacuum vapor deposition apparatus, and includes a vacuum flow path 43 connected to a vacuum pump 41 via a valve 42, a boat (target) 44 into which a metal to be deposited (for example, aluminum or chromium) is placed, a boat A heater 45 for heating 44, a power source 46 for the heater 45, and the like are provided.

  The movable mold 51 is configured such that movement between adjacent molds and movement along the mold surface can be performed by an actuator (servo motor or cylinder) (not shown).

Next, a film forming apparatus 10 for forming the side turn lamp 1 will be described.
As shown in FIG. 3, in the film forming apparatus 10, a manufacturing apparatus 50 is disposed in the housing 11. The manufacturing apparatus 50 includes a movable mold 51 and a fixed mold 52. A mold clamping device 70 having a toggle mechanism for clamping the movable mold 51 and the fixed mold 52 is connected to the movable mold 51 of the manufacturing apparatus 50.

  An air conditioner 77 for air conditioning / ventilating the inside of the housing 11 is attached to the upper surface of the housing 11, and an air outlet provided at a lower portion of the air conditioner 77 in an opening 76 formed in the housing 11. 78 is inserted through the casing 11 so that conditioned air can be blown out. An inspection port 12 is appropriately provided on the side surface of the housing 11. For example, the inspection port 12 is provided at a position corresponding to the side surface of the manufacturing apparatus 50 and can be easily opened and closed. Here, the inspection port 12 is preferably of a type that can ensure airtightness.

Further, on the side surface of the housing 11, the vicinity of the position corresponding to the manufacturing apparatus 50 is preferably made of transparent glass or the like so that the inside of the housing 11 can be visually recognized.
In addition, an injection material supply device 81 in which a resin material for injection molding is accommodated, a vacuum pump 41 for film formation, and a power source 46 are disposed in the vicinity of the side portion of the housing 11.

  The mold clamping device 70 includes a main body 71 and an arm 72. A control unit or the like is accommodated in the main body unit 71, and the arm unit 72 is configured to move by a signal from the control unit. The arm portion 72 includes a first link 63, a second link 64, a third link 65, a first pin 66, a second pin 67 and a third pin 68. One end of the first link 63 is pivotally connected to the first pin, and the other end is pivotally connected to the second pin 67. One end of the second link 64 is pivotally connected to the second pin 67 and the other end is pivotally connected to the third pin 68. The third link 65 is composed of two rod-like members, each one end being connected to the third pin 68 and each other end being connected to the movable mold 51. When the arm portion 72 is movable, the movable mold 51 is moved together, and the movable mold 51 and the fixed mold 52 can be clamped.

Here, the mold clamping device 70 has a toggle mechanism, and is configured such that the toggle mechanism functions effectively at the mold clamping position a for injection molding. That is, the first link 63 and the second link 64 of the arm portion 72 are configured to be driven by a motor (not shown) or the like so as to extend linearly (stroke end) at the mold clamping position a for injection molding. Yes.
Therefore, at the position of the film forming mold clamping position b in FIG. 2, the first link 63 and the second link 64 of the arm portion 72 are configured to be clamped at a position before the stroke end.

  The molding material supply device 81 is disposed outside the casing 11 and is provided in the middle of the tank 89 that contains the material, the supply pipe 90 that supplies the material to the cavity formed in the mold, and the supply pipe 90. And a valve 91 configured to open and close the path. The supply pipe 90 penetrates the casing 11 in the middle thereof, is guided into the casing 11, and is configured to be able to supply material into each mold. The material accommodated in the tank 89 is supplied into the mold cavity through the supply pipe 90 after the valve 91 is opened in accordance with an instruction from a control unit (not shown), and the primary injection and the secondary injection. It is configured to be possible. When injection molding is performed using a plurality of materials, the molding material supply device 81 is provided with a device for each type of material.

  A vacuum pump 41 and a power supply 46 provided in the film forming apparatus 40 are disposed outside the housing 11, and the vacuum pump 41 penetrates the housing 11 in the middle of the vacuum flow path 43 connected thereto, and the housing 11 and is connected to a space for film formation. In addition, a wiring is connected to the power source 46, and the wiring passes through the housing 11 and is connected to the heater 45. Note that the vacuum pump 41 and the power source 46 may be disposed in the housing.

  Next, the process of forming the side turn lamp 1 into a film will be described with reference to FIGS. Note that while the film forming apparatus 10 is in operation, the air conditioner 77 is also operating in conjunction with the inside of the housing 11 as a clean room.

  As shown in FIG. 4A, the mold surfaces 53 and 54 of the movable mold 51 are arranged so as to face the mold surfaces 55 and 56 of the fixed mold 52, respectively.

  As shown in FIG. 4B, after the movable mold 51 is moved in the direction of the fixed mold 52 and the molds 51 and 52 are clamped so that the toggle mechanism functions by the mold clamping device 70, In this state, the material constituting the lens unit 2 and the housing 4 is molded by primary injection. In the primary injection, the injection material is supplied from the injection material supply device 81 to the cavities for molding the lens unit 2 and the housing 4.

  As shown in FIG. 4C, after the primary injection is completed, the movable mold 51 is moved in the mold opening direction. At this time, the lens unit 2 is designed so as to remain on the fixed mold 52 side, and the housing 4 is positioned on the movable mold 51 side.

  As shown in FIG. 5D, the movable mold 51 is moved in a direction (horizontal direction) along the mold surface so that the housing 4 faces the film forming apparatus 40.

  As shown in FIG. 5 (E), a movable mold 51 is moved in the mold clamping direction to form a molding mold surface 54 on which the housing 4 is molded, and a film forming mold surface 57 in which the film forming apparatus 40 is built. After the mold is clamped and the sealed film formation space is formed, the valve 42 is opened and the air in the film formation space is evacuated from the vacuum flow path 43 by the vacuum pump 41 to bring the film formation space into a vacuum state. .

  Here, the film forming mold clamping position b is offset from the injection molding mold clamping position a by a height h so as to be close to the mold clamping device 70, so the film forming mold clamping position b In this case, the toggle mechanism of the mold clamping device 70 does not constitute the maximum force, and is smaller than the mold clamping force at the mold clamping position a for injection molding.

  Further, an O-ring 59 is attached to the end face of the film forming mold surface 57. When the molding mold surface 54 and the film forming mold surface 57 are clamped, the inside and outside of the film forming mold are connected to each other. And a gap d (for example, 0.3 mm or more) is positively formed between the mold surfaces 54 and 57. Therefore, a minute gap that makes it difficult to evacuate between the mold surfaces 54 and 57 is not formed, and the time required for the film formation space to be in a vacuum state can be shortened. In other words, it does not take time to evacuate like the gap between the mold matching surfaces when the maximum force is applied by the toggle mechanism.

  In this state, the film forming material disposed on the boat 44 is melted and vaporized by the heater 45 heated by the power source 46. Then, the surface exposed from the film forming mold surface 57 in the housing 4 is formed by the film forming material made of the vaporized metal material, and the film forming surface 61 is formed. Here, in the film forming step, the member incorporating portion 62 is masked with a masking material (not shown) so that the film forming surface 61 is not formed.

  As shown in FIG. 5F, after the film formation is completed, the movable mold 51 moves in the mold opening direction, and the housing 4 is separated from the film forming mold surface 57.

  As shown in FIG. 6 (G), the light bulb 3 and the terminal 7 are assembled into the member incorporating portion 62 of the housing 4 from a member incorporating device (not shown), and then the movable mold 51 is along the die surface (horizontal direction). The lens unit 2 and the housing 4 are arranged so as to face each other. In addition, you may perform the timing which incorporates a member, after arrange | positioning so that the lens part 2 and the housing 4 may oppose.

  As shown in FIG. 6 (H), the movable mold 51 is moved in the direction of the fixed mold 52 and clamped, and in this clamped state, the resin material 5 is secondarily placed between the lens portion 2 and the housing 4. It is integrally formed by injection. Here, the resin material 5 is supplied from an injection material supply device 81.

  As shown in FIG. 6I, the movable mold 51 is moved in the mold opening direction, and the side turn lamp 1 is taken out by an unillustrated pushing member. And the side turn lamp 1 can be continuously manufactured by moving the movable metal mold | die 51 to the state of FIG. 4 (A) again, and repeating the above-mentioned series of processes.

  According to the present embodiment, a mold clamping position a for injection molding for injection molding the lens portion 2 and the housing 4 to the pair of movable mold 51 and fixed mold 52 for manufacturing the side turn lamp 1, A film forming mold clamping position b for forming a film on the housing 4 is set, and in the film forming apparatus 10 configured so that the lens portion 2 and the housing 4 can be integrally formed with the resin material 5, for injection molding. Since the height c is offset by the height h so that the mold clamping force at the film forming mold clamping position b is set smaller than the mold clamping force at the mold clamping position a, the mold clamping force is at the film forming mold clamping position b. Without being maximized, it is possible to prevent the movable mold 51 and the fixed mold 52 from being brought into a complete contact state during mold clamping.

  In other words, the mold clamping device 70 is used so that the first link 63 and the second link 64 of the arm portion 72 are linear (stroke end) at the mold clamping position a for injection molding. Since the toggle mechanism functions to the maximum at the clamping position a and the clamping force is maximized, injection molding can be reliably performed.

  On the other hand, since the first link 63 and the second link 64 of the arm portion 72 are configured to be bent at the film forming mold clamping position b (before the stroke end), at the film forming mold clamping position b. The mold clamping force is not maximized, and the movable mold 51 and the fixed mold 52 can be clamped with an appropriate mold clamping force.

  Further, at the film forming mold clamping position b, a positive gap d in consideration of vacuuming is formed on the mold clamping surface of the movable mold 51 and the fixed mold 52. When the inside of the mold (film formation space) formed when the film mold surface 57 is clamped is evacuated using the vacuum pump 41, the molding mold surface 54 and the film formation mold surface 57 The air existing in the gap d formed between the two can be easily sucked, and the inside of the mold can be evacuated in a short time.

  Further, since the O-ring 59 is interposed in the gap d described above, the gap d formed between the molding die surface 54 and the film-forming die surface 57 is reliably secured, and at the same time, the O-ring 59 ensures the clearance. It can be blocked from the external space. Therefore, when the pressure in the mold is set to a vacuum state, the time required to reach the degree of vacuum can be shortened, and film formation can be performed without reducing workability. In addition, by using the rubber O-ring 59, it can be easily replaced even if the O-ring 59 deteriorates, so that the gap d can always be ensured.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the specific configuration such as the shape of each member constituting the mold clamping device is not limited to the above embodiment, and can be changed as appropriate.

  In the present embodiment, the case where the O-ring is attached to the film forming mold surface side has been described. However, the O-ring may be attached to the forming mold surface side. In this case, when the molding is performed by primary injection, the molding die surface is clamped by the clamping device, so that a concave portion matching the shape of the O-ring is formed on the opposing molding die surface so that the O-ring does not collapse. That's fine.

It is a side view of the side turn lamp in the embodiment of the present invention. It is a schematic block diagram of the manufacturing apparatus in embodiment of this invention. It is a schematic block diagram of the film-forming apparatus in embodiment of this invention. It is explanatory drawing which shows the manufacturing process of the side turn lamp in embodiment of this invention. It is explanatory drawing which shows the continuation of FIG. It is explanatory drawing which shows the continuation of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Lens part (molded body) 4 ... Housing (molded body) 10 ... Film forming apparatus 51 ... Movable mold (molded mold) 52 ... Fixed mold (molded mold) 59 ... O-ring a ... Clamping position for injection molding b ... Clamping position for film formation d ... Gap

Claims (4)

An injection molding clamping position for injection molding the pair of molded bodies and a film forming clamping position for forming a film on the molded body are set on the pair of molded body molds . A film forming device in which a mold clamping device for moving a molding die to the mold clamping position for injection molding and the film forming mold clamping position is mounted so that the pair of molded bodies can be integrally molded. In the molding equipment,
The injection mold clamping position of the pair of molding dies is offset to a position higher than the film forming mold clamping position by a predetermined height,
The mold clamping device includes an arm portion that is configured by a link and is connected to the one molding die, and the arm portion is linearly or bent, so that the pair of molding dies are formed. Move to the injection molding clamping position and the film forming clamping position,
Deposition molding apparatus wherein said that the direction of the clamping force in the film mold clamping position is set smaller than the clamping force of the injection molding mold clamping position. The A over arm portion,
A first link having one end rotatably connected to the first pin connected to the main body, and the other end rotatably connected to the second pin;
A second link having one end rotatably connected to the second pin and the other end rotatably connected to the third pin;
It is composed of two rod-shaped members, each having one end connected to the third pin, and each other end having a third link connected to the one mold. The film forming apparatus according to claim 1. 3. The film forming apparatus according to claim 1, wherein a gap is formed on a mold clamping surface between the pair of mold dies at the film forming mold clamping position. The film forming apparatus according to claim 3, wherein an O-ring is interposed in the gap.

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