DE102006045369A1 - Production of hollow moldings with thin film on inner surface comprises injection molding pair of half-shells and vapor coating in mold, by covering with vaporization chamber containing target electrode, substrate electrode and vacuum line - Google Patents

Abstract

Production of hollow moldings with a thin film on an inner surface comprises: (A) injection molding a pair of half-shells using a stationary and a movable mold with cavities which butt together; (B) opening the mold so that one half-shell remains on the stationary mold and one on the movable mold and forming a thin film on at least one of them; closing the mold so that the half-shells butt together; and (C) injecting molten resin into the joint between them. The film is produced by vapor coating in the mold, by covering it with a vaporization chamber containing a target electrode, a substrate electrode and a vacuum line. Independent claims are included for: (A) hollow moldings produced using the method; and (B) molding machines for use in the method comprising a stationary mold (1) with a stationary core (13) and cavity (15); a movable mold (17) with a cavity (18) and core (19) which cooperate with those on the stationary mold; and (C) a vaporization system comprising a target electrode, substrate electrode and vacuum line. The vaporization system comprises a cup which can be fitted over the stationary or movable mold cavity when the mold is open and has a sealing ring around its rim.

Description

The present application is based on Japanese Patent Application No. 2005-168984 which is incorporated herein by reference.

The The present invention relates to a method for forming a hollow casting with a thin film on its inner surface, the method comprising: a primary casting step for injection molding a Pair of half-hollow bodies using a stationary one Shape and a movable shape, in relation to the stationary shape can be moved so that their openings have a butt part; a sputtering step of forming a thin film on the inner surface of at least one of the half-hollow bodies, by the primary to water were trained; and a secondary casting step for joining the paired half-hollow body, around the hollow body to get by the openings the paired half-hollow body in an upper state are held abutting, wherein the half-hollow bodies stay in their respective forms, and adding a molten synthetic resin to the abutting ones Parts is injected. The present invention further relates a hollow casting obtained by performing the casting process and a casting apparatus used to carry out the casting process becomes.

One hollow casting with a thin film in a thickness of a few microns, on a part of the inner surface of a hollow body is designed, for example, for a headlight or a Taillight used, which is mounted on a vehicle. The lamp consists of a recessed body part with an electric Pear and one in one piece with the opening of the body part connected lens unit together. The body part becomes, for example poured by an injection molding process and in a vacuum evaporation tank on a hanging device suspended wherein an uncoated part such as the outer surface is masked becomes. On the body part is then made using the sputtering method described below formed a thin film. The bodypart with the thin film and the separately molded lens part are in the respective ones Shapes used that the opening of the body part and the edge of the lens part are aligned with each other and collide against each other. Of the body part and the lens part are melted by injecting a Synthetic resin to the connecting part connected to one another hollow casting to form a thin film on its inner surface.

The A vapor deposition method for forming a thin film on the inner surface of the Body part or on the surface a substrate such as the body part is known from the prior art. Such is the atomization process, for example known in which the thin film is formed by the substrate and the target opposite each other can be arranged and a negative voltage of several kV in an argon gas atmosphere from several Pa to several tens Pa is applied to the target. Furthermore the vacuum evaporation method is known in which the film is formed is placed by placing the substrate and a vapor source in a vacuum container become. Furthermore, the ion plating method is known in the vacuum evaporation in an argon gas under a pressure of performed several Pa by applying a negative voltage of several kV to the substrate is created. After all the chemical deposition method is known.

JP-B-2-38377 discloses a method of forming a hollow casting by injection molding. More specifically, the method of forming a hollow casting includes: a primary casting in which a pair of primary half-hollow castings are formed by a pair of cavities defined by the stationary mold and the slip mold so as to provide a joint around the opening thereof; and a secondary casting in which the molds are opened so that a primary half-hollow casting remains on the stationary mold while the other primary half-hollow casting remains on the slip mold, the slip mold being pushed to a position where the joints of the paired primary half-hollow castings are aligned are, wherein the castings are then clamped against each other and the connecting parts are joined together by the injection of the molten synthetic resin. Furthermore, there is Japanese Patent No. 3,326,752 a casting method according to JP-B-2-38377 in which a guide member is formed integrally during the primary molding on the inside of the connecting part or the abutment part of a primary semi-hollow casting, wherein the abutting part of the other primary semi-hollow casting for secondary casting is guided by the guide part of the abutting part of the one semi-hollow primary casting when he is fitted on the abutting portion of the primary semi-hollow casting. On the other hand that gives Japanese Patent No. 3,047,21 a casting method in which the hollow casting is formed as described above by injecting the resin so that the angle formed between the piercing part and the injection point in the secondary casting can be 90 degrees or less.

When the hollow casting having the thin film is formed on the inner surface by the above-described method of the prior art will cause many problems because the body part is previously formed by injection molding and then has to be transported to the vacuum tank for the vapor deposition. For example, the substrate is previously formed and then stored. In this case, the substrate may be contaminated on its surface by touch or dust, so that a Bedampfungsfehler is caused. To avoid this, the handling of the substrate must be done extremely carefully, which increases the cost. In addition, when the prefabricated substrate is stored, there is an administrative burden. In addition, the body part must be removed from the mold before it is steamed, and then re-inserted into the mold to connect it, thereby lowering productivity.

On the other hand, the injection molding of JP-B-2-38377 not only advantageous because the individual steps can be automated to produce the hollow castings in bulk, but also because hollow castings can be made with complex shapes. According to the invention of Japanese Patent No. 3,326,752 For example, with some deformation, the butt parts can also be brought into good butted relationship so that the secondary casting resin can not leak. Furthermore, the invention of Japanese Patent No. 3,047,213 characterized in that the bonding force is so high that the molten resin for secondary casting can also be cast with fewer injection parts. Because of these advantages and properties, the inventions are still used effectively today. However, the prior art casting methods can not form a thin film having a thickness of only a few micrometers on the inner surface of the hollow casting.

From intended from the injection molding of the prior art the present invention to provide a casting method, the above solves the problems of the prior art, wherein It is an object of the invention to provide a method of forming a hollow casting with a thin film on the inner surface, whereby impurities on the surface to be vaporized prevented so the quality is not affected by sputtering errors, and being an automatic to water just done and a casting apparatus for executing the Casting specify.

Around will solve the above task according to the invention the inner surface of at least one of the paired half-hollow bodies passing through the stationary mold and the movable mold are formed, steamed in the mold, wherein the half-hollow body in the stationary Form or in the movable mold remains and through a vapor deposition chamber covering a vapor deposition element such as a target electrode, a substrate electrode or a vacuum suction tube. The openings of the steamed a half-hollow body and the other half-hollow body become contiguous held, then the molten resin is injected, around the abutting ones Parts to connect with each other.

Around to solve the above problem is according to one First aspect of the invention, a method for forming a hollow Casting with a thin film on the inner surface , the method comprising: a primary casting, comprising: injection molding a Pair of half-hollow bodies using a stationary one Shape and a movable in relation to the stationary shape, so their openings have a shock part; a steaming, which includes: opening the forms, so that the one half-hollow body on the side of the stationary mold stays while the other half-hollow body remains on the moving mold; and forming a thin film on the inner surface at least one of the half-hollow bodies formed by the primary casting become; and a secondary one To water, this includes: clashing the openings the paired and steamed half-hollow body, which in their remain relevant forms; and injecting a molten synthetic resin to the buttocks, around the paired half-hollow bodies to connect with each other and thereby the hollow body wherein forming a thin film during sputtering in the molds carried out is, by the semi-hollow body remaining in the forms by a vapor deposition chamber are covered, which is a sputtering element contains a target electrode, a substrate electrode, and a vacuum suction tube includes.

According to one second aspect of the invention, the movable mold to a first Casting position and a second casting position in relation to the stationary Shape to be moved.

According to one third aspect of the invention is a hollow casting with a thin film on its inner surface indicated by the method according to the first aspect of the invention is trained.

According to a fourth aspect of the invention, there is provided a casting apparatus for forming a hollow casting having a thin film on its inner surface, the casting apparatus comprising: a casting device comprising: a stationary mold having a stationary core and a stationary depression on a parting line side for forming of paired half-hollow bodies; and a movable mold leading to a first molding position and a second molding position with respect to the sta tionary form can be moved and comprises a movable recess and a movable core on a parting line side, which cooperate with the stationary core and the stationary recess; and an evaporator; wherein a pair of half-hollow bodies are formed primarily at the first casting position of the movable mold by the stationary core and the movable core, and by the stationary recess and the movable recess, the paired half-hollow bodies remaining in the stationary recess and the movable recess and secondarily at the second casting position of the movable mold, wherein the vapor deposition means comprises a vapor deposition chamber inserted between the parting lines of the opened molds, and wherein the vapor deposition chamber comprises: a sealing means disposed at the opening and in a gas-tight state against the parting line surface of the mold stationary mold or the movable mold, and a vapor deposition element comprising a target electrode, a substrate electrode, and a vacuum suction tube. According to a fifth aspect of the invention, the movable mold may be rotated to the first molding position and the second molding position with respect to the stationary mold.

According to the invention becomes the inner surface of at least one of the paired half-hollow bodies passing through the stationary mold and the movable mold are formed, steamed in the mold, wherein the half-hollow body in the stationary Form or in the movable mold remains and through a vapor deposition chamber with a sputtering element such as a target electrode, a Substrate electrode or a vacuum suction tube is covered. Especially become the half-hollow bodies not removed from the mold, but using the evaporation chamber steamed in the mold, so that the vaporized surface is not affected by contact or Dust is contaminated. According to the invention can therefore a hollow casting with a thin film in a superb Bedampfungsqualität on the inner surface be provided. Furthermore, the evaporation is carried out in the mold, wherein the half-hollow bodies stay in shape, so that no warehouse management is required for the half-hollow body. The steamer has the further advantage that a automatic casting economical carried out can be without for that a special form must be used.

1 is a sectional view of a mold according to a first embodiment of the invention.

2 Fig. 10 is a perspective view schematically showing the embodiment of a steamer according to the invention.

3A to 3D are sectional views showing the individual molding steps using the mold according to the first embodiment of the invention: 3A shows the state in which the primary casting is completed; 3B shows the state after steaming; 3C shows the state before the secondary casting; and 3D shows the condition after secondary casting.

4A to 4C are sectional views showing a mold according to a second embodiment of the invention: 4A Fig. 11 is a sectional view enlarging the opened movable mold; 4B shows the state after steaming; and 4C shows the state after the secondary casting in each case reduced views.

5A to 5F are views showing a shape according to a third embodiment of the invention: 5A and 5B Figs. 15 are perspective views each showing a stationary shape and an opened rotational shape from the perspective of the parting line side; and 5C to 5F are plan views showing single casting steps from the perspective of the parting line side with the stationary mold and the rotary mold opened.

Hereinafter, an exemplary hollow cast article having a thin film on the inside, which is formed by injection molding a cup-shaped body part with a thin film such as a reflection film on the inner surface and a thin lenticular cover member for sealing the opening of the body part, wherein the thin film on the Inner surface of the body part is formed in the mold and wherein the opening of the body part is sealed by the cover member. First, an embodiment of the casting apparatus of the invention will be described. 1 FIG. 10 is a sectional view schematically showing the casting apparatus according to an embodiment of the invention with a closed mold. FIG. According to a first embodiment, the casting device comprises as in 1 shown a stationary form 1 , a sliding mold 10 and a movable form 17 , Furthermore, the slip mold 10 so on the stationary form 1 attached that as in 1 is shown sliding vertically.

The stationary form 1 is fixed to the base in a manner known in the art. In the embodiment of 1 is a main funnel 2 over the stationary form 1 educated. From the upper side of the stationary form 1 extends a holding member 3 to the top, where a piston-cylinder unit 4 is attached to the slip mold 10 drive. By supplying / discharging the working liquid to / from the piston-cylinder unit, the sliding mold becomes 10 to a first position of 1 or moved to an upper second position, which will be described below.

The sliding mold 10 is with a primary funnel 11 and a secondary funnel 12 equipped with a predetermined distance vertically spaced from each other. The primary funnel 11 is at the first position of 1 with the main funnel 2 the stationary form 1 aligned. At a second position described below is the second funnel 12 with the main funnel 2 aligned. The sliding mold 10 is at a position above a parting line P with a slide side core 13 provided for forming the cup-shaped body part. At a predetermined distance around the slide side core 13 around is a small core 14 designed to form a connecting part. At a position below the parting line P is a sliding side groove 15 formed to form the cover member. An enema 16 opens on the sliding side recess 15 ,

In the side of the parting line P of the movable mold 17 is a motion side well 18 for forming the body part in correspondence with the slide side core 13 educated. The enema 16 opens in this motion page indentation 18 , At the position of the movable mold 17 on the side of the parting line P is a moving side core 19 formed, the Gleitseitenvertiefung 15 equivalent. With a predetermined distance around the motion side core 19 around is a small core 19 ' formed to form the connecting part. On the side of the parting line P of the movable mold 17 is a sprue 5 trained, with the main funnel 2 the stationary form 1 is aligned.

2 schematically shows an embodiment of a steamer 20 , According to the embodiment of 2 includes the sputtering device 20 a vaporization chamber 25 working on a multi-joint robot 21 is attached. In this embodiment, the sputtering method is used wherein the sputtering apparatus 20 a vacuum source 30 with a suction pump for the Vakuumbedampfung, a noble gas tank or a noble gas feeder 31 for supplying a noble gas such as a carbon dioxide gas and a power supply device 32 includes. In particular, the multi-joint arm extends 24 from the top of a stand 23 who is based on 22 of the multiple multi-joint robot 21 stands. The vaporization chamber 25 is at the front end portion of the multi-joint arm 24 attached. The vaporization chamber 25 has a evaporation well 26 with a predetermined opening area or a predetermined volume. In the opening of the evaporation well 26 is still an O-ring 27 disposed in contact with the parting line P of the slip mold 10 is pressed. If the evaporation well 26 through the O-ring 27 with a predetermined force into contact with the parting line surface P of the movable mold 17 is pressed, it encloses the body part and forms the evaporation chamber 25 with a vacuum required for the evaporation.

In the evaporation well thus formed 26 Evaporating elements are arranged. These sputtering elements are not in 2 because, in this embodiment, the sputtering method is used, however, for example, a target electrode is provided near the opening of the sputtering well 26 and a substrate electrode arranged in the depth can be provided. These electrodes are connected to a DC or high frequency power source, and the substrate electrode is electrically connected to the substrate in the mold. In the evaporation well 26 Further, not only a gas introduction tube for introducing a noble gas such as an argon gas, but also an evacuation tube opens. The gas introduction tube, the evacuation tube and the power lines connected to the electrodes extend through the interior of the multi-jointed arm 24 and the stand 23 of the robot and are via connecting pipes 28 . 28 , ... each with the inert gas supply device 31 , the vacuum source 30 and the power supply device 32 connected.

Hereinafter, an exemplary casting operation using the casting apparatus according to the first embodiment will be described with reference to FIG 3 described. The sliding mold 10 is clamped when at the lower first position of 1 located. Then define the sliding side core 13 and the motion side recess 18 the movable form 17 a body casting cavity Ch. Furthermore, the sliding side recess define 15 the sliding mold 10 and the motion side core 19 a cover member molding cavity Cf. A molten resin is passed over the main hopper in a manner known in the art 2 injected. The molten resin flows through the main hopper 2 , the funnel 12 , the sprue 5 and the enemas 16 and 16 and fills the body casting cavity Ch and the cover member casting cavity Cf. By this primary casting, a body part H and a cover member F are poured to provide a connection half-pit M 'around the opening. The condition after primary casting is in 3A shown.

After a cooling cure, the movable mold becomes 17 opened, with the body part H in the movable mold 17 remains and the cover member F in the Gleitform 10 remains. When the mold is opened, the inner surface of the body part H becomes the dividing line area P released. Then the vaporization chamber 25 using the multi-joint robot 21 over the O-ring 27 against the parting line P of the movable mold 17 pressed and encloses the body part H. This state is in 3B shown. The vacuum source 30 and the noble gas feeder 31 the steamer 20 are driven to produce an argon gas atmosphere of several Pa to several tens Pa in the vapor deposition chamber 25 manufacture. Then, a discharge is provided by applying a negative voltage to the target and a positive voltage of several hundred volts to the body part H. Thereby, a thin film U is formed on the inner surface of the body part H in a manner known in the art, so that a body HU1 having a thin film is obtained.

After steaming, the evaporation chamber 25 withdrawn from the space between the parting lines P of the mold. Then the slip mold becomes 10 pushed to the upper secondary molding position, where the openings of the body HU1 and the cover member F are aligned with each other. The aligned position is in 3C shown. Then it will be like in 3D the connection part or a connection cavity M is shown formed by the half recesses M 'in the outer periphery of the abutting parts of the body HU1 and the cover member F. The molten resin is poured over the main funnel 2 injected. The molten resin flows over the secondary shaping funnel 12 by the influence in the connection cavity M. By this secondary molding, the body HU1 and the cover member F are connected to each other. The mobile form 17 is opened to extract the hollow casting with the thin film on the inner surface. These casting operations are repeated accordingly.

According to the first embodiment described above, the sliding mold 10 and the movable form 17 provided with depressions or cores for forming the paired body part and cover member, so that in a cycle only a hollow casting is produced with a thin film. However, when the recesses or cores are provided in a plurality of pairs, a plurality of hollow castings can be formed in one cycle. Furthermore, the structure of the connection cavity is not limited to that of the embodiment, but may be as in the Japanese Patent No. 3,326,752 and the Japanese Patent No. 3,047,213 be modified described.

The sliding mold 10 is in the first embodiment on the stationary mold 1 while in the second embodiment of FIG 4 a sliding mold 55 on a moving board 56 is arranged and a stationary form 41 on a stationary board 40 is arranged. This stationary board 40 is with a main funnel 42 provided with a sprue 43 between the stationary board 40 and the stationary form 41 communicated. The sprue 43 communicates with a first and a second funnel 44 and 45 for the primary casting and a third funnel 46 for secondary casting. At the confluence between the main funnel 42 and the sprue 43 Furthermore, a hopper switching device RK is provided as proposed by the applicant and in the Japanese Patent No. 3,047,213 is specified. By the operation of this funnel switching device RK is the main funnel 42 to the first and second funnels 44 and 45 for the primary casting or to the third funnel 46 switched for secondary casting.

In the parting line P of the stationary mold 41 with this construction is a stationary side core 50 designed to form the body part. With a predetermined distance around this stationary side core 50 around is a small core 51 formed to form the connecting part. The first funnel 44 for the primary pouring opens to the top of the stationary side core 50 , In the lower part of the dividing line surface P is further a stationary side recess 52 provided for forming the cover member. The funnel 45 for the primary pouring opens into this well 52 ,

The sliding mold 55 is so in the moving panel 56 mounted that as in 4A can slide vertically shown. This slip mold 55 is operated by an actuator such as a piston-cylinder unit, wherein the drive means is not shown. In the parting line P of the slip mold 55 is a sliding side recess 57 in correspondence with the stationary side core 50 educated. At a predetermined position under the Gleitseitenvertiefung 57 is a sliding side core 58 trained, that of the stationary side well 52 equivalent. Around the sliding side core 58 around is a small core 59 formed to form the connecting part.

In the following, an exemplary casting process will be described. The mold is clamped. Then form the stationary side core 50 and the sliding side recess 57 a cavity for forming the body part. At the same time, the stationary side well shape well 52 and the sliding side core 58 the cover member F. The funnel switching device RK is switched so that the molten resin in the sprue 43 for primary casting can flow. In this case, the molten resin is in a known manner from the main hopper 42 injected. The molten resin flows over the main funnel 42 , the funnel switching device RK, the sprue 43 and the first and the second funnel 44 and 45 for the primary casting so that it fills the body part cavity and the cover member cavity. As a result, the body part H and the cover member F are poured substantially simultaneously. Then the moving board becomes 56 open. Due to the shape or other property of the mold, the body part H remains in the sliding side recess 57 the sliding mold 55 and the cover member F remains in the stationary side recess 52 the stationary form 41 , The opened state is in 4B shown.

Using the multi-joint robot 21 becomes the vaporization chamber 25 as described above, via the O-ring to the parting line P of the slip mold 55 pressed to the body part H or Gleitseitenvertiefung 57 to surround. Then, the thin film U is formed as described above. The vaporization chamber 25 is withdrawn. Then the slip mold becomes 55 moves to the secondary molding position where the openings of the body part H and the cover member F are aligned with each other. The aligned state is in 4C shown. The mold is closed in this aligned state. Then, the funnel switch RK is switched to supply the molten resin for secondary casting via the main funnel 42 inject. The molten resin flows out of the third funnel 46 for secondary casting through a sprue 43 ' and fills the connection cavity M. In this way, a hollow casting is obtained in which the body part H and the cover member F are connected to each other and which has the thin film on its inner surface.

5 shows a third embodiment, which is a disc-shaped or columnar stationary form 60 and a disk-shaped or columnar rotary mold 70 used. 5A is a perspective view showing the stationary shape 60 shows, and 5B is a perspective view from the side of the parting line surface P with open rotary shape 70 , In the parting line P of the stationary mold 60 is a stationary side well as shown 61 formed to form the body part at a position which is radially offset by a predetermined distance to the center position. Furthermore, a stationary side core 62 for forming the cover member at a position along the circumference of 120 degrees to that of the stationary side recess 61 is offset. Furthermore, a stationary side recess 63 formed at a position along the circumference of 120 degrees from the stationary side recess 61 or the stationary side core 62 is spaced. This stationary side recess 63 is formed with a predetermined depth to receive the core for forming the body part during the secondary molding, which will be described below. In the center part of the stationary form 60 with this construction is a funnel 64 formed, which communicates with the nozzle of the injection machine. The funnel 64 opens in the stationary side well 61 over a sprue 65 , which is formed in the parting line P, and the inlet, not shown.

In the parting line P of the rotary mold 70 are a turning page core 71 and a rotary side recess 72 formed at a distance of 120 degrees along the circumference. The rotary side core 71 is with the stationary side well 61 paired and forms a cavity for forming the body part after closing at a predetermined position. Furthermore, the rotary side recess acts 72 with the stationary side core 62 together to form a cavity for forming a cover member. Also in the rotary form 70 is a turn side recess 73 formed at a position 120 degrees from the rotary side core 61 or the rotary side recess 72 is spaced. In this rotation page recess 73 becomes the stationary side core 62 for forming the cover member during secondary molding. In the parting line P is in the center part of the rotary mold 70 with the construction described a sprue 75 formed over the inlet with the rotary side recess 72 communicated.

On the outer circumference of the stationary side core 62 or the rotary page core 71 the small core is formed to form a recess for connection with the opening of the body part or the cover member as in 1 and 4 (but not in 5 ) or in the Japanese Patent No. 3,326,752 and no. 3,047,213 specified form. In this case, neither the drive device nor the closing device for driving the rotary mold 60 shown at a predetermined angle or in a reciprocating motion. The device of 2 is on the steamer 20 applied.

5A and 5B are perspective views of the stationary mold 60 and the rotary form 70 , which are respectively opened and shown from the side of the parting line P. 5C to 5F are top views of the shapes 60 and 70 , which are respectively opened and shown from the parting line P. The exemplary castings using the molds 60 and 70 will be explained with reference to these figures. The forms are in the state of 5A and 5B or 5C and 5D clamped. Then, the cavity for forming the body part by the stationary side recess 61 the stationary form 60 and the rotary side core 71 the rotary mold 70 educated. Furthermore, the cavity for forming the cover member by the stationary side core 62 the stationary form 60 and the rotary side recess 72 of the rotary mold 70 educated. Continue to open the sprues 65 and 75 through the sprue into the cavity. That over the funnel 64 injected / supplied molten synthetic resin flows through the respective sprues 65 and 75 and fills the respective cavities. By this primary casting, the body part and the cover member are melted substantially simultaneously. After a cooling cure, the rotary mold becomes 70 open, with the body part in the stationary side recess 61 the stationary form 60 remains and the cover member in the rotary side recess 72 the rotary mold 70 remains. Then the stationary side recess becomes 61 with the remaining body part pressed against the parting line P and through the evaporation chamber 25 closed. The thin film is formed on the inner circumference of the body part as described above.

When the formation of the thin film is completed, the vapor deposition chamber becomes 25 withdrawn from the space between the parting lines P. The rotary mold 70 becomes like the arrows of 5B indicated clockwise and counterclockwise rotated 120 degrees. Then that in the stationary side recess 61 the stationary form 60 Remaining body part after steaming and that on the rotary side recess 72 remaining cover member aligned with each other at their openings. In this aligned state, as in 5E and 5F shown the stationary side core 62 the stationary form 60 in the turn side recess 73 the rotary mold 70 and the rotary side core 71 the rotary mold 70 in the stationary side recess 63 the stationary form 60 added. Then the molds can be clamped. After clamping the molds, the secondary molding resin (not shown) fills the connecting space of the abutting part between the body part and the cover member. By the secondary casting, the hollow casting with the thin film on the surface is completed, with the body part having the thin film on its inner circumference.

In the above-described third embodiment, the stationary side recesses 61 , the stationary side core 62 and the stationary side recess 63 in the stationary form 60 formed at a distance of 120 degrees along the circumference. In this case, only a hollow casting with a thin film on the inner surface can be produced in a cycle. However, if two similar depressions or cores are provided with an interval of 60 degrees, two hollow castings can be produced in one cycle. It should be understood, however, that the thin film may also be formed on the inner surface of the cover member.

Claims (5)

Method for forming a hollow casting with a thin film on the inner surface, the method comprising: a primary casting that involves the injection molding of a pair of semi-hollow bodies using a stationary one Form and a movable with respect to the stationary form form comprises so that their openings a bumper exhibit, a vaporization, which includes: opening the Shapes so that the semi-hollow body on the side of the stationary mold stays while the other half-hollow body remains on the moving mold, and Forming a thin film on the inner surface at least one of the half-hollow bodies formed by the primary casting be, and a secondary one To water, this includes: abutting the openings the paired and steamed half-hollow body, which in their respective forms remain, and Injecting a molten one Synthetic resin to the buttocks, around the paired half-hollow bodies with each other to connect and thereby form the hollow body, in which forming a thin film while the steaming in the molds is performed by the in the Forms permanent half-hollow body be covered by a vapor deposition chamber, which is a sputtering element contains comprising a target electrode, a substrate electrode and a vacuum suction tube. Method for forming a hollow casting after Claim 1, characterized in that the movable mold to a first casting position and a second casting position in relation on the stationary Shape can be moved. Hollow casting with a thin film on the inner surface, the is formed by the method according to claim 1. A casting apparatus for forming a hollow casting having a thin film on the inner surface, comprising: a casting device comprising: a stationary mold (10); 1 ), which has a stationary core ( 13 ) and a stationary depression ( 15 ) on a parting line side for forming paired half-hollow bodies, and a movable form (FIG. 17 ) leading to a first casting position and a second casting position with respect to the stationary shape ( 1 ) and a movable depression ( 18 ) and a movable core ( 19 ) on a dividing line side (P), which is connected to the stationary core ( 13 ) and the stationary depression ( 15 ), and an evaporator, wherein a pair of half-hollow bodies primarily at the first casting position of the movable mold by the stationary core ( 13 ) and the movable core ( 19 ) as well as through the stationary depression ( 15 ) and the movable recess ( 18 ), wherein the paired half-hollow bodies in the stationary recess ( 15 ) and the movable recess ( 18 ) and secondarily at the second casting position of the movable mold ( 17 ), wherein the vapor deposition device is a vapor deposition chamber ( 25 ) inserted between the dividing lines (P) of the opened molds, and wherein the vapor deposition chamber ( 25 ) comprises: a sealing device ( 27 ), which is arranged at the opening and in a gas-tight state against the parting line surface (P) of the stationary mold ( 1 ) or the movable mold ( 17 ), and a sputtering element comprising a target electrode, a substrate electrode, and a vacuum suction tube. Casting device for forming a hollow casting according to claim 4, characterized in that the movable mold ( 17 ) to the first casting position and the second casting position with respect to the stationary mold ( 1 ) can be rotated.