JP5788563B1 - Vacuum valve for molding equipment - Google Patents

Abstract

There is provided a vacuum valve for a molding apparatus in which the number of constituent elements is small, assembly work is simple, and air can be discharged and an exhaust passage can be closed well. A first holding unit (2) is provided with a first accommodation hole (20) that is substantially three-dimensional. The movable unit 4 includes a first insertion portion 41 having a substantially cubic shape so that the movable unit 4 can be mounted in the first accommodation hole 20. The first facing surface 200 facing the second holding unit 2 of the first holding unit 2 is a surface that is extended flat. Several lateral grooves 46 are provided on the side surface of the second insertion portion 42 near the first communication groove 31. [Selection] Figure 4

Description

  The present invention relates to a vacuum valve, and more particularly to a vacuum valve for a molding apparatus that can quickly and reliably discharge air in a molding cavity of a molding apparatus that fills a molding material to produce a molded product.

  2. Description of the Related Art Conventionally, for example, a configuration shown in FIG. 9 to FIG. 10 is known as a configuration example that facilitates filling of a molding material by discharging air from a molding cavity of a molding apparatus (see, for example, Patent Document 1). The vacuum valve 8 according to the conventional example includes a first mold and a second mold so that a molding cavity formed by combining a first mold and a second mold in a molding apparatus (not shown) communicates with the outside. It is attached to an exhaust passage formed by extending from the molding cavity to the outside between the mold. The vacuum valve 8 is assembled between the first holding unit 81, the second holding unit 82, and the combined holding units 81, 82. The first holding unit 81 has a flow path capable of communicating with the exhaust passage therebetween. And a movable unit 83 that is slidably movable.

  The first holding unit 81 includes a first main body portion 811 formed in a block shape and an elastic member 812 such as a spring provided in the first main body portion 811. The first body portion 811 includes a sliding surface 813 that is recessed in a bowl shape from the surface facing the second holding unit 82, a sliding groove 816 that has a L-shaped cross section that is further recessed from the sliding surface 813, A mounting hole 817 extending in the shape of a letter along the longitudinal direction of the exhaust passage, that is, the exhaust direction, is formed so that the elastic member 812 is mounted, and the sliding groove 816 and the mounting hole 817 communicate spatially. It is provided to be.

  The second holding unit 82 has a second main body portion 821 that faces the first main body portion 811, and a part of the second holding unit 82 faces the first main body portion 811 of the second main body portion 821. Has a first curved surface portion 822 that is concave and convex so that a plurality of convex portions 823a and a plurality of concave portions 823b are arranged in an intersecting manner. A housing space I to which the movable unit 83 is attached is defined between the sliding surface 813 and the first curved surface portion 822.

  The movable unit 83 slides between the first main body portion 811 and the second main body portion 821 so as to be convertible between a closed state where the flow path is closed from the outside and a communication state where the flow path is communicated with the outside. The sliding body 831 is provided so that the surface 813 can reciprocate along the exhaust direction, and the sliding surface 813 slides along the exhaust direction toward the first main body portion 811 of the sliding body 831. A locking block 837 protruding from the surface and having a L-shaped cross section is movably inserted into the L-shaped sliding groove 816, and the second is directed to the second main body 821 of the sliding body 831. A part of the surface of the surface is uneven so that the plurality of convex portions 835b and the plurality of concave portions 835a are arranged so as to be in contact with each other in correspondence with the first curved surface portion 822, and the first curved surface portion 822 is a conversion space that can be converted into a closed state and a connected state of the flow path. Second curved portion 835 which faces spaced II is provided. The locking block 837 has an insertion portion that is inserted into the sliding groove 816, and a locking portion that is configured to have a larger diameter than the insertion portion so that it can be temporarily retained in the sliding groove 816. An inflow side channel 801 on the exhaust passage side and an outflow side channel 802 exhausted to the outside so as to be connected with a space II. Slots 836 and 836 extending perpendicularly to the exhaust direction are provided on both sides of the locking block 837 on the first surface of the sliding body 831, and one or more balls 832 are slidably rollable in each slot 836. It is mounted in contact with the surface 813.

  A roller 833 is rotatably attached to the locking portion of the locking block 837 so as to contact the inner wall of the sliding groove 816. The elastic member 812 has an attachment hole so that the sliding body 831 has an urging force that is elastically pressed against the locking portion of the locking block 837 so as to be able to contact the inner surface of the sliding groove 816 on the inflow side flow path 801 side. 817. In the locking portion of the locking block 837, a screw hole 835 is provided along the direction parallel to the insertion direction of the insertion portion into the sliding groove 816 from the bottom surface on the bottom side of the sliding groove 816, and the screw 838 is provided in the sliding groove 816. The conversion space II is adjustable and attached to the screw hole 835 while contacting the bottom.

Taiwan Patent Application No. 201231189

  In the conventional vacuum valve, when the molding material flows into the inflow side flow path 801 from the exhaust passage, the sliding body 831 is moved, air is discharged from the outflow side flow path 802 and the outflow side flow path 802 is closed. Therefore, the inside of the molding cavity can be reliably maintained in a vacuum state. However, there are still areas for improvement. For example, since the L-shaped sliding groove 816 and the L-shaped locking block 837 have a special shape, they must be assembled separately into a plurality of components, which is complicated and complicated. However, it takes time to assemble, and there is a problem that the manufacturing cost increases.

  Further, when the sliding body 831 is pressed by the pressing force by the molding material and moves on the sliding surface 813, the pressing force is decomposed into a component force parallel to the sliding surface 813 and a component force perpendicular to the sliding surface 813, and a frictional force. Acts in proportion to the parallel component force. The sliding body 831 cannot move favorably due to the action of this frictional force, and the frictional force is further increased by the molding material that has entered the inflow side flow path 801, so that air is discharged from the outflow side flow path 802. There is also a problem that the outflow side channel 802 cannot be satisfactorily closed.

  The present invention has been made by solving the above-described problems, and has a reduced number of components, requires less labor for assembly, and can be used for forming a vacuum for a molding apparatus that can satisfactorily discharge air and close an exhaust passage. The object is to provide a valve.

In order to achieve the above object, a vacuum valve for a molding apparatus according to the present invention is used by being attached to a molding apparatus in which an exhaust passage is formed in which a molding cavity communicates with the outside along a first direction. A vacuum valve that extends perpendicularly to the first direction and that is open at both ends, and is parallel to the first direction in a peripheral wall that defines the first accommodation hole; A first holding unit provided with a plurality of first rolling grooves that are respectively recessed from the opposing wall surfaces and that extend along the first direction, and face the first holding unit. It is provided so as to be combined, and is recessed perpendicularly to the first direction so as to define a receiving hole by the first receiving hole, and one end thereof is opened with a smaller diameter than the opening of the first receiving hole. A second receiving hole and the second receiving hole A first communication groove and a second communication groove are provided in which both side portions of the capacity hole along the first direction are recessed and the second accommodation hole communicates with the outside along the first direction. The bottom surface of the peripheral surface defining the second accommodation hole has a plurality of concave portions and a plurality of convex portions that extend long along a second direction perpendicular to the same plane as the first direction. A second holding unit provided with a first curved surface portion that is concave and convex so as to be lined up along the first direction, and a communication state in which the accommodation hole communicates with the outside, and is closed from the outside. The first holding unit and the second holding unit are mounted in the receiving hole so as to be reciprocally movable along the first direction so that the first holding unit and the second holding unit can be converted into a closed state. A first insertion portion formed to be received in the receiving hole and the second receiving hole. A second insertion portion having a diameter larger than that of the first insertion portion, and the first insertion portion corresponds to the first rolling groove in the first insertion portion. A plurality of second rolling grooves, which form rolling paths together with the moving grooves, are provided, and a part of the surface of the second insertion portion facing the second holding unit is the first. A plurality of convex portions and a plurality of concave portions are arranged so as to be in contact with each other so that they can come into contact with the concave and convex portions, and communicated from the first curved surface portion to the exhaust passage and the outside. A movable unit provided with a second curved surface portion facing each other with a flow path formed by the first communication groove and the second communication groove, and the first holding unit and the movable unit. And is accommodated in the rolling passage formed by the first rolling groove and the second rolling groove. And a plurality of set screws inserted into both ends of the rolling passage along the first direction and mounted to position the ball in the rolling passage. comprising a rolling unit, the first opposing surface said toward the second holding unit side of the first holding unit Ri flat name be stretched along said first direction, said first The holding unit is provided with a vent hole penetrating toward the first accommodation hole so as to extend along the first direction, and the opposite end of the vent hole is the first holding unit. An opening is formed in an outer side surface and an inner wall surface defining the first accommodation hole, and is communicated with the outside through an opening on the outer side surface side .

  According to the present invention, since the first facing surface is flat, the movable unit can reciprocate favorably with respect to the first holding unit between the first holding unit and the second holding unit. Therefore, air can be discharged and the exhaust passage can be closed well.

It is a figure which shows an example of use of the vacuum valve for shaping | molding apparatuses which concerns on this invention. It is an assembly perspective view of the vacuum valve for molding devices concerning the present invention. It is a disassembled perspective view which shows the structure of the vacuum valve for shaping | molding apparatuses which concerns on this invention. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is sectional drawing in CC line of FIG. It is sectional drawing in the DD line | wire of FIG. It is operation | movement explanatory drawing of the vacuum valve for shaping | molding apparatuses which concerns on this invention. It is a disassembled perspective view which shows an example of the conventional vacuum valve. FIG. 10 is an assembled cross-sectional view of FIG. 9.

Hereinafter, preferred embodiments of a vacuum valve for a molding apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
(Embodiment)
A vacuum valve 100 according to the present invention is used by being attached to a molding apparatus 1 in which a first mold 11 and a second mold 12 are vertically assembled as shown in FIGS. is there. The first mold 11 has a cavity hole 111, the second mold 12 has a cavity hole 121, and is molded by the cavity holes 111 and 121 when the first mold 11 and the second mold 12 are combined. A cavity (not shown) is defined. The molding apparatus 1 is formed in a casing shape so as to have a first side surface 101 on the opposite side of the molding cavity and a second side surface 102 on the outer side, and the first mold 11 and the second mold 12 are formed. There is an exhaust passage (not shown) formed extending from the molding cavity to the outside.

  As shown in FIGS. 2 and 3, the vacuum valve 100 is installed in the exhaust passage of the molding apparatus 1 so that the molding cavity communicates with the outside in order to exhaust the molding cavity. 1 holding unit 2, second holding unit 3, movable unit 4, elastic unit 5, and rolling unit 6. The first holding unit 2 has an outer peripheral wall formed by two first outer surfaces 202 and 203 on the molding cavity side and the outer side, and the second holding unit 3 has two second walls on the molding cavity side and the outer side. And the first outer side surface 202 and the second outer side surface 302 become the first side surface 101 and the other first outer side surface 203. The other second outer surface 303 forms the second side surface 102.

  As shown in FIGS. 4, 5, and 7, the first holding unit 2 is combined with the second holding unit 3 so as to be vertically opposed to each other in the first direction X parallel to the exhaust passage. For example, it is formed in a substantially rectangular shape, extends in a direction perpendicular to the first direction X, for example, has a substantially cubic shape, penetrates in a direction perpendicular to the first direction X, and both ends are open. A first accommodation hole 20 is provided, and an opening opened to the first mold 11 side is closed by the first mold 11. The first facing surface 200 on the second holding unit 3 side of the first holding unit 2 is extended along the first direction X and flattened. The first accommodation hole 20 is a peripheral wall composed of two inner wall surfaces 20a, 20b facing each other in parallel with each other in the first direction X and two connection side surfaces 20c facing each other, connecting the inner wall surfaces 20a, 20b. It is defined by.

  For example, as shown in FIGS. 2 and 4, the first holding unit 2 is a screw hole provided so as to penetrate from the first outer surface 203 toward the first accommodation hole 20 along the first direction X. 21 and the screw hole 21 from the first outer surface 203 to the first receiving hole 20 so as to extend along the first direction X at a predetermined interval in a direction perpendicular to the first direction X. The air hole 22 provided so as to penetrate through, the first cooling passage 23 provided so as to penetrate the inside of the first holding unit 2, and the screw hole 21 facing the first accommodation hole 20. And an adjustment hole 24 provided so as to penetrate from the first outer surface 202 toward the first accommodation hole 20 along the first direction X. A thrust screw 25 is attached to the adjustment hole 24. It is done.

  For example, as shown in FIG. 2, the opposite ends of the screw hole 21 are formed on the first outer surface 203 of the first holding unit 2 and the inner wall surface 20 b that defines the first receiving hole 20. A thread is provided on the inner surface of the opening 211 on the first outer surface 203 side. A plurality of first rolling grooves 201 are formed in the two connection side surfaces 20 c of the first accommodation hole 20 so as to be more recessed and to be extended along the first direction X. In this embodiment, four first rolling grooves 201 are provided on each connection side surface 20c, two at a time so as to be arranged perpendicularly to the first direction X.

  The air holes 22 are formed such that opposite ends thereof are opened to the first outer surface 203 of the first holding unit 2 and the inner wall surface 20b that defines the first housing hole 20, and the first outer surface is formed. It communicates with an external air pump (not shown) through an opening 221 on the 203 side. The air pump is an air supply unit that press-fits air into the first accommodation hole 20.

As shown in FIG. 5, the first cooling passage 23 surrounds the first accommodation hole 20 and opposite ends thereof are opened in the first outer surface 203 and formed in the first outer surface 203. One opening is formed as a first introduction hole 231 so as to communicate with a coolant circulation device (not shown), and the other opening formed in the first outer surface 203 is a first lead-out hole 232. Is formed.
The adjusting hole 24 is formed such that opposite ends thereof are opened to the first outer surface 202 of the first holding unit 2 and the inner wall surface 20a that defines the first receiving hole 20, and the first outer surface is formed. A screw thread is provided on the inner surface of the opening 241 on the 202 side, and the thrust screw 25 is screwed into the adjustment hole 24 through the opening 241.

The second holding unit 3 is formed with a flat second opposing surface 300 that contacts the flat first opposing surface 200 of the first holding unit 2 and a recess from the second opposing surface 300. The second accommodation hole 30 whose one end is open to the first holding unit 2 side, and both side portions along the first direction X of the second facing surface 300 are recessed, and the second accommodation hole 30 is the first accommodation hole 30. The first communication groove 31 and the second communication groove 32 communicated with the outside along the direction X. When the first holding unit 2 and the second holding unit 3 are combined vertically, the first receiving hole 20 and the second receiving hole 30 define the receiving hole 7 for receiving the movable unit 4. . In this embodiment, the opening on the first facing surface 200 side of the first housing hole 20 is formed to have a smaller diameter than the opening on the second facing surface 300 side of the second housing hole 30.
The bottom surface of the peripheral surface defining the second accommodation hole 30 has a plurality of recesses and a plurality of protrusions that extend long along a second direction Y that is a direction perpendicular to the same plane as the first direction X. A first curved surface portion 301 is provided that is concave and convex so that the portions are arranged in an intersecting manner along the first direction X.

  The second holding unit 3 is further provided with a second cooling passage 33. As shown in FIGS. 4 and 6, the second cooling passage 33 is separated from the second accommodation hole 30 and opposite ends. Is formed as a second introduction hole 331 so that one opening formed in the second outer surface 303 communicates with a coolant circulation device (not shown). Another opening formed in the second outer surface 303 is formed as a second outlet hole 332. When the movable unit 4 is put in the accommodation hole 7 and the first holding unit 2 and the second holding unit 3 are combined, the first holding unit 2, the second holding unit 3, and the movable unit 4 are A flow path 70 that can communicate with an exhaust passage (not shown) is formed.

  The movable unit 4 can be converted into a communication state (FIG. 7) in which the accommodation hole 7 communicates with the outside and a closed state (FIG. 8) in which the accommodation hole 7 is closed from the outside. Between the holding unit 3 and the holding hole 3 so as to be reciprocally movable along the first direction X. In this embodiment, the movable unit 4 has a first insertion portion 41 formed so as to be accommodated in the first accommodation hole 20 and a first insertion portion 41 so as to be accommodated in the second accommodation hole 30. This is a block body whose cross section is formed in a slightly T shape from the second insertion portion 42 formed to have a larger diameter.

  The first insertion portion 41 has a communication hole 43 extending along the first direction X so as to communicate with the screw hole 21 and a first direction so as to communicate with the ventilation hole 22. A rolling hole that accommodates the ball 61 together with the first rolling groove 201 corresponding to the first rolling groove 201 and the first rolling groove 201 so as to extend along the first direction X. Several second rolling grooves 45 having a substantially circular cross section are provided so that a dynamic passage is formed.

  The second insertion portion 42 has a plurality of convex portions and a plurality of concave portions intersecting so that a part of the surface facing the second holding unit 3 can come into contact with the first curved surface portion 301. A second curved surface portion 421 is provided so as to be lined up and down and facing the first curved surface portion 301 with a flow path 70 therebetween. Several lateral grooves 46 are provided on the side surface near the first communication groove 31 so as to be arranged at intervals and to extend along the second direction Y. The flow path 70 has a gap between the first curved surface portion 301 and the second curved surface portion 421 so that the concave and convex portions can be fitted to each other. The first communication groove 31 and the second communication groove 32 allow the flow path 70 to be connected to the exhaust passage. An exhaust device that is provided so as to be able to communicate and is installed to be exhausted to the outside formed by the inflow channel 701 on the exhaust passage side formed by the first communication groove 31 and the second communication groove 32. And an outflow side flow path 702 communicated with the flow path 702.

  In this embodiment, when the movable unit 4 is combined with the first holding unit 2 and the second holding unit 3 so as to be accommodated between the first holding unit 2 and the second holding unit 3, FIG. 7, when the movable unit 4 is moved to the molding cavity side so that the first curved surface portion 301 and the second curved surface portion 421 do not come into contact with each other, the flow path 70 is communicated with the outside, and is brought into a communication state. Become. As shown in FIG. 8, when the molding material flows into the inflow channel 701 and the movable unit 4 is moved to the outside, the second curved surface portion 421 contacts the first curved surface portion 301 and flows out. The flow path 702 is closed and configured to be in a closed state.

  The elastic unit 5 uses a coil spring 51 and an adjusting screw 52. The coil spring 51 has one end portion that abuts against the first insertion portion 41 and is fixed to the communication hole 43, and the other end portion that extends from the one end portion to the screw hole 21. The adjustment screw 52 is in contact with the other end of the coil spring 51 so that the coil spring 51 has an accumulating force that moves the movable unit 4 from the closed state to the communication state in order to always move the movable unit 4 to the communication state. The connecting hole 43 has a rod-like insertion portion that is inserted into the screw hole 21 so as to be installed in the screw hole 21, and a screw portion that is screwed into the opening 211 of the screw hole 21 from the insertion portion.

The rolling unit 6 is provided between the first holding unit 2 and the movable unit 4 so as to be accommodated in a rolling passage formed by the first rolling groove 201 and the second rolling groove 45. The balls 61 are inserted into both ends of a rolling passage formed by the plurality of balls 61, the first rolling groove 201 and the second rolling groove 45 to position the ball 61 in the rolling passage. And several set screws 62 attached in this manner.
When the vacuum valve 100 is assembled, the thrust screw 25 is pushed toward the first insertion portion 41 along the first direction X so as to abut against the outer peripheral surface of the first insertion portion 41 and the movable unit of the coil spring 51 The radial width of the flow path 70 when the movable unit 4 is positioned in the communication state can be finely adjusted by the accumulating force that moves the 4 in the communication state along the first direction X.

Next, the operation and action of the vacuum valve according to the present invention assembled according to the above configuration will be described.
When a molding operation is performed using the molding apparatus 1, when an air pump (not shown) is activated as shown in FIGS. 3 and 4, the molding apparatus 1 is passed through the vent hole 22 of the first holding unit 2. Exhaust. First, air is press-fitted into the first accommodation hole 20 (first stage). Thus, the inside of the first accommodation hole 20 becomes higher in pressure than other parts, and the internal pressure of the high-pressure air in the first accommodation hole 20 is lower than that of the first accommodation hole 20 as shown by the arrow in FIG. If it flows into the flow path 70 side, it flows separately into the inflow side flow path 701 side and the outflow side flow path 702 side. Due to these airflows, the opposing surface of the movable unit 4 on the first insertion portion 41 side, the second insertion surface 42 of the second insertion portion 42 on the first insertion portion 41 side, and the first holding unit 2 first. Since the opposing surfaces 200 of the movable unit 4 can be separated without contacting each other, the frictional force due to the reciprocating movement of the movable unit 4 along the first direction X can be reduced.

  As shown in FIGS. 5 and 6, when the coolant circulation device (not shown) is also activated simultaneously with the activation of the air pump, the coolant passes through the first cooling passage 23 and the second cooling passage 33. It circulates and flows. Thus, the apparatus temperature of the vacuum valve 100 can be maintained at a predetermined working temperature. If it does in this way, when each component of the vacuum valve 100 will become high temperature by the high temperature molding material inject | poured into the shaping | molding apparatus 1, and a volume will expand, the assembly precision between each combined component will fall, It is possible to prevent the vacuum valve 100 from operating properly.

  Then, as shown in FIG. 7, when the exhaust device disposed on the outflow side flow path 702 side is activated, the molding material in the molding apparatus 1 flows from the molding cavity to the flow path 70 side through the exhaust passage. Next, as shown in FIG. 8, when the molding material enters from the inflow side channel 701 and enters the second accommodation hole 30 along the second curved surface portion 421, the second insertion portion 42. Is pressed, and the movable unit 4 is moved in the first direction X. Finally, a part of the second curved surface portion 421 on the outflow side flow channel 702 side is the outflow side flow channel 702 of the first curved surface portion 301. Touch part of the side. As the molding material enters the flow path 70, a part of the second curved surface portion 421 and the first curved surface portion 301 on the outflow side flow channel 702 side comes into close contact with each other. In this way, the molding material is sandwiched between the second curved surface portion 421 and the first curved surface portion 301, and the flow rate of the molding material is determined by the uneven surface between the second curved surface portion 421 and the first curved surface portion 301. Is relaxed and fixed. As a result, the inflow side channel 701 is closed, and the outflow side channel 702 is exhausted. When the molding material enters between the second curved surface portion 421 and the first curved surface portion 301 from the inflow side flow path 701, the pressing force to the movable unit 4 is effectively achieved by passing through the several lateral grooves 46. The movable unit 4 can be moved quickly.

  When the molding operation is completed, the supply pressure of the air pump is increased, and the molding material remaining between the second curved surface portion 421 and the first curved surface portion 301 can be discharged from the outflow side flow channel 702. Can be cleaned without residual molding material. Finally, stop the air pump supply.

Advantages of the vacuum pump for forming apparatus according to the present invention configured as described above will be described below.
First, since the first insertion portion 41 having a substantially cubic shape of the movable unit 4 can be inserted and mounted in the first accommodation hole 20 of the first holding unit 2 as it is, a conventional hook-like slip It is not necessary to divide the conventional first holding unit 81 into a plurality of components according to the body 831. Therefore, the number of components can be effectively reduced, the assembly is simplified, and the manufacturing cost can be reduced.

  In addition, since the first facing surface 200 and the second facing surface 300 are flat surfaces, when the molding material enters the inflow side channel 701, the movable unit 4 is held in the first state by the entry of the molding material. The unit 2 can be reciprocated along the first direction X. Further, when air is supplied through the vent hole 22 by the air pump, there is a gap between the movable unit 4 and the second insertion portion 42 and the first insertion portion 41, so that the movable unit 4 and the second insertion are inserted. The part 42 can be separated without contacting the first insertion part 41. Therefore, the reciprocating movement of the movable unit 4 along the first direction X can be favorably performed. Further, it is possible to prevent the molding material from remaining in the flow path 70.

  Moreover, since the apparatus temperature of the vacuum valve 100 can be maintained at a predetermined working temperature by circulating cooling using the first cooling passage 23 and the second cooling passage 33, a high-temperature molding material injected into the molding apparatus 1 When the components of the vacuum valve 100 become high temperature and the volume expands, the assembly accuracy between the combined components is lowered, and the vacuum valve 100 cannot be prevented from operating well. be able to.

  In addition, since several lateral grooves 46 are provided on the side surface near the first communication groove 31 of the second insertion portion 42, a part of the side surface is made uneven, so that the first molding material 1 Since the movement between the curved surface portion 301 and the second curved surface portion 421 can be prevented, the advance input to the flow path 70 of the molding material can be effectively changed to the pressing force to the movable unit 4, The movement of the movable unit 4 along the first direction X becomes better. Further, the amount of the molding material entering the flow path 70 can be reduced.

DESCRIPTION OF SYMBOLS 1 Molding apparatus: 101 1st side surface: 102 2nd side surface: 11 1st type | mold: 12 2nd type | mold: 111,121 Cavity hole: 100 Vacuum valve for molding apparatuses: 2 1st holding | maintenance unit: 20 1st 1 accommodation hole: 200 1st opposing surface: 201 1st rolling groove: 202, 203 1st outer surface: 20a, 20b Inner wall surface: 20c Connection side surface: 21 Screw hole: 211 Opening: 22 Vent hole: 221 Opening: 23 First cooling passage: 231 First introducing hole: 232 First outlet hole: 24 Adjustment hole: 241 Opening: 25 Thrust screw: 3 Second holding unit: 30 Second receiving hole: 300 Second facing surface: 301 First curved surface portion: 302, 303 Second outer surface: 31 First communication groove: 32 Second communication groove: 33 Second cooling passage: 331 Second introduction hole: 33 Second outlet hole: 4 Movable unit: 41 First insertion portion: 42 Second insertion portion: 421 Second curved surface portion: 43 Communication hole: 44 Through hole: 45 Second rolling groove: 46 Lateral groove: 5 Elastic unit: 51 Coil spring: 52 Adjustment screw: 6 Rolling unit: 61 Ball: 62 Positioning screw: 7 Housing hole: 70 Flow path: 701 Inflow side flow path: 702 Outflow side flow path: X First direction: Y second direction

Claims (7)

A vacuum valve used by being attached to a molding device in which an exhaust passage is formed in which a molding cavity communicates with the outside along a first direction,
From the first accommodation hole opened through both ends extending perpendicularly to the first direction and the opposing wall surface parallel to the first direction in the peripheral wall defining the first accommodation hole, respectively. A first holding unit provided with a plurality of first rolling grooves that are recessed and extended along the first direction;
The first holding unit is provided so as to face the first holding unit and is recessed perpendicularly to the first direction so as to define a receiving hole by the first receiving hole, and one end of the first holding unit is formed in the first receiving unit. A second accommodation hole having a smaller diameter than the opening of the hole, and both side portions along the first direction of the second accommodation hole are recessed, and the second accommodation hole is along the first direction. A first communication groove and a second communication groove communicated to the outside, and a bottom surface of the peripheral surface defining the second accommodation hole has a second angle perpendicular to the same plane as the first direction. A second curved surface portion is provided that has a concavo-convex shape so that a plurality of concave portions and a plurality of convex portions that are elongated along the direction of 2 are arranged in an intersecting manner along the first direction. A holding unit;
The first direction between the first holding unit and the second holding unit so that the accommodation hole can be converted into a communication state in which the accommodation hole communicates with the outside and a closed state in which the accommodation hole is closed from the outside. And a first insertion portion formed to be received in the first receiving hole and to be received in the second receiving hole. A second insertion portion formed larger in diameter than the first insertion portion, and the first insertion portion is aligned with the first rolling groove corresponding to the first rolling groove. A plurality of second rolling grooves are formed in which a rolling passage is formed, and a part of a surface of the second insertion portion facing the second holding unit is formed on the first curved surface portion. Correspondingly, a plurality of convex portions and a plurality of concave portions are arranged so as to be in contact with each other so that they can come into contact with each other. And a movable unit provided with a second curved surface portion facing each other with a flow path formed by the first communication groove and the second communication groove so as to communicate with the exhaust passage and the outside. ,
A plurality provided between the first holding unit and the movable unit, so as to be accommodated in the rolling passage formed by the first rolling groove and the second rolling groove. A rolling unit having a plurality of set screws inserted into both ends of the rolling passage along the first direction and mounted to position the ball in the rolling passage; With
The first opposing surface said toward the second holding unit side of the first holding unit Ri flat name be stretched along said first direction,
The first holding unit is provided with a vent hole penetrating toward the first accommodation hole so as to extend along the first direction;
The opposite ends of the ventilation hole are formed in the outer surface of the first holding unit and the inner wall surface defining the first accommodation hole, and communicates with the outside through the opening on the outer surface side. A vacuum valve for a molding apparatus.   In order to always move the movable unit to the communication state between the first holding unit and the first insertion portion, an accumulating force for moving the movable unit from the closed state to the communication state is provided. 2. The vacuum valve for a molding apparatus according to claim 1, wherein an elastic unit having the same is attached. The first holding unit is provided with a screw hole penetrating toward the first accommodation hole along the first direction,
The opposite ends of the screw hole are opened in the outer surface of the first holding unit and the inner wall surface defining the first accommodation hole, and a screw thread is provided on the inner surface of the opening on the outer surface side. ,
The first insertion portion is provided with a communication hole extending along the first direction so as to communicate with the screw hole,
The elastic unit includes a coil spring having one end that abuts against the first insertion portion and is fixed to the communication hole, and another end that extends from the one end to the screw hole, and the coil A spring contacts the other end of the coil spring and is inserted into the screw hole so as to have an accumulating force that moves the movable unit from the closed state to the communicating state, and is screwed into the opening of the screw hole. 3. The vacuum valve for a molding apparatus according to claim 2, further comprising an adjusting screw to be formed. The first holding unit extends from the outer wall surface of the first holding unit so as to extend along the first direction so as to face the screw hole with the first accommodation hole. An adjustment hole penetrating toward the one accommodation hole is further provided, and a thread is provided on the inner surface of the opening on the outer surface side of the first holding unit;
The vacuum valve for a molding apparatus according to claim 3, wherein a thrust screw is attached to the adjustment hole. The first insertion portion is provided with a through hole extending through the first insertion portion along the first direction so as to communicate with the vent hole. The vacuum valve for a molding apparatus according to claim 1 . The first holding unit is provided with a first cooling passage that penetrates the inside of the first holding unit, and opposite ends of the first cooling passage are first on the outer surface of the first holding unit, respectively. As an introduction hole and a first outlet hole,
The second holding unit is provided with a second cooling passage that penetrates the inside of the second holding unit, and opposite ends of the second cooling passage are second on the outer surface of the second holding unit, respectively. The vacuum valve for a molding apparatus according to claim 1, wherein the vacuum valve is opened as an inlet hole and a second outlet hole.   The side surface of the second insertion portion near the first communication groove is provided with a plurality of lateral grooves that are arranged at intervals and are extended along the second direction. Item 2. A vacuum valve for a molding apparatus according to Item 1.

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