WO2021144947A1 - Dispositif et méthode de moulage par injection - Google Patents

Dispositif et méthode de moulage par injection Download PDF

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Publication number
WO2021144947A1
WO2021144947A1 PCT/JP2020/001447 JP2020001447W WO2021144947A1 WO 2021144947 A1 WO2021144947 A1 WO 2021144947A1 JP 2020001447 W JP2020001447 W JP 2020001447W WO 2021144947 A1 WO2021144947 A1 WO 2021144947A1
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WO
WIPO (PCT)
Prior art keywords
wax
injection
rubber mold
injection molding
cavity
Prior art date
Application number
PCT/JP2020/001447
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English (en)
Japanese (ja)
Inventor
幾營 久保
Original Assignee
株式会社エイシン技研
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社エイシン技研 filed Critical 株式会社エイシン技研
Priority to JP2020530395A priority Critical patent/JP6756958B1/ja
Priority to PCT/JP2020/001447 priority patent/WO2021144947A1/fr
Publication of WO2021144947A1 publication Critical patent/WO2021144947A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/63—Venting or degassing means

Definitions

  • the present application relates to an injection molding apparatus and an injection molding method for wax used for lost wax casting.
  • the first process is the process of manufacturing the prototype.
  • the second process is the process of manufacturing a rubber mold that has a cavity with the same shape as the prototype.
  • the third process is the process of injecting wax dissolved in a rubber mold and taking it out to manufacture a wax mold with the same shape as the prototype.
  • a large number of wax molds are manufactured by repeating the third step.
  • a large number of wax molds manufactured in the third step are attached in a tree shape while melting the end of the wax mold around the wax rod, and this is mounted in a tubular heat-resistant container and plaster is poured.
  • the process of making a plaster mold is the process of manufacturing the prototype.
  • an electric furnace, a gas furnace, or the like is used to dissolve and wash away the wax inside the gypsum mold at low temperature, completely burn the wax adhering to the inside of the cavity at medium temperature, and raise the temperature further to make the gypsum mold.
  • a firing process in which gypsum is strong enough to withstand the impact of pouring noble metal, and then the temperature is lowered to a level suitable for pouring noble metal.
  • the sixth process is a casting process in which precious metal is poured into a plaster mold that has many cavities similar to the prototype.
  • the plaster mold is rapidly cooled with water to break the plaster into pieces, take out the dendritic precious metal, cut off the excess part, and polish the precious metal with the same shape as the prototype. Process.
  • a mold (not shown) having a size corresponding to the size of the rubber mold 50 to be created, the prototype 1, and the parts 2 (runner 2a and sprue 2b) are used. Close the bottom of the mold with a plate, put the material before vulcanization of silicone rubber in the lower half, place the part 2 bonded to the prototype 1 on it, and then put the material before vulcanization in the upper half. Put it in, cover the upper part of the frame with a plate, raise the temperature while pressing, and vulcanize.
  • a two-component solidified silicone rubber may be used instead of the vulcanizable rubber.
  • the rubber mold 50 is taken out from the frame to form a notch 56, and the prototype 1 and the part 2 adhered to the prototype 1 are taken out, and the upper rubber mold 50a is taken out. And the lower rubber mold 50b.
  • a rubber mold 50 having a cavity 51 and an injection port 52 having the same shape as the prototype 1 and the component 2 inside can be obtained.
  • Such a notch 56 also has an effect of facilitating evacuation and sealing of the pressurized wax when injecting wax into the rubber mold 50 to create a wax mold.
  • the wax mold is taken out from the rubber mold 50, if the upper rubber mold 50a is separated from the mating surface (cut) 3c and then taken out while deforming the lower rubber mold 50b, even if the wax mold has a complicated shape, it is taken out. , Can be easily taken out without breaking.
  • the inside of the rubber mold may be divided into several parts or a core may be inserted.
  • the size and thickness of the rubber mold will change accordingly.
  • the hardness of the rubber is often changed according to the durability of the rubber mold and the difficulty of removing the wax mold from the inside of the rubber mold.
  • FIG. 2 shows a conceptual diagram of the injection molding apparatus 10 used in the third step.
  • the injection molding device 10 has a main body device 20, a clamp unit 30, and a rubber mold 50.
  • the main body device 20 has a wax tank 21 for storing wax in a pressurized state, a vacuum tank 22 connected to a vacuum pump, and an injection unit 24.
  • the clamp unit 30 is for clamping the rubber mold 50, and some have a function of pressing the injection port 52 of the rubber mold 50 against the injection portion 24.
  • the injection unit 24 can be selectively connected to the wax tank 21 and the vacuum tank 22 by the switch 25, and has an air suction function for sucking (evacuating) the air in the cavity 51 and a wax for injecting wax into the cavity 51. It has two functions, an injection function.
  • the injection molding device 10 clamps the rubber mold 50 with the clamp unit 30, presses the rubber mold 50 against the injection portion 24, sucks the air in the cavity 51 from the injection portion 24, and injects wax from the injection portion 24 into the cavity 51. ..
  • the ultimate vacuum of a vacuum pump that performs suction is about -100 kpa to -95 kpa.
  • the perfect vacuum is theoretically -101.325 kpa. Therefore, even if the air in the cavity 51 is sucked, a few percent of the air always remains in the cavity as residual air.
  • an injection molding device that injects wax into a rubber mold such as in jewelry manufacturing, has a much lower injection pressure, so this residual air is completely removed. Can't be crushed.
  • injection molding using a mold since a certain amount of resin can be injected with a screw or a plunger, it is possible to provide an air bleeding mechanism in the mold.
  • injection molding using a rubber mold since wax is injected under constant pressure conditions, an air bleeding mechanism cannot be provided. (If an air bleeding mechanism is provided, wax will enter the air bleeding mechanism and clog it.)
  • the rubber mold shown in FIG. 1 has the simplest design, but if the wax is immediately injected after vacuuming the inside of the cavity, the wax will flow from the sprue through the sprue to both ends of the ring, and the hot water will flow. At the farthest point from the road, the waxes rejoin. Then, the above-mentioned several percent of the air is collected at this confluence and condensed to a pressure that is in equilibrium with the injection pressure.
  • the condensed air causes bubbles or wrinkles, and the wax mold becomes defective.
  • a ring-shaped object as shown in FIG. 1 for example, a ring
  • the problem of residual air cannot be sufficiently solved only by the method using powder. Especially as the design becomes more complex, the problem of residual air becomes even greater. Therefore, I managed to make a wax mold while shifting the position of action of the clamping force, changing the injection pressure, changing the temperature of the wax, etc., and the person in charge every time a new design is made. The current situation is that the hardships are constant.
  • One object of the present invention is to reduce the residual air in the cavity as much as possible. Another object of the present invention is to enable more faithful wax mold production due to the shape of the cavity. Another object of the present invention is to enable the production of wax molds having a more precise or fine shape.
  • a wax tank for storing wax and The injection part connected to the wax tank and A suction part that can suck air and It has an injection port capable of contacting the injection portion, a suction port capable of contacting the suction portion, and a rubber mold having a cavity connected to the injection port and the suction port.
  • An injection molding device that injects wax from the wax tank from the injection portion into the rubber mold cavity by the pressure in the wax tank.
  • An injection molding device is disclosed in which the cavity and the suction port are connected via a wax blocking portion that allows the passage of air and blocks the passage of wax.
  • the cavity and the wax blocking portion are connected by a plurality of connecting passages.
  • the rubber mold has a notch passing through the wax blocking portion and / or the connecting passage.
  • the vertical or horizontal dimension of the cross section of the wax blocking portion is three times or less the thickness of the wax film formed on the wax blocking portion when the wax is injected.
  • the wax blocking portion has a plurality of passages whose cross-sectional vertical or horizontal dimensions are three times or less the thickness of the wax film formed on the wax blocking portion when wax is injected.
  • the present application is an injection molding method using any of the above injection molding devices.
  • the first step of sucking the air inside the rubber mold from the suction part It has a second step of injecting wax from the injection portion into the rubber mold.
  • An injection molding method is disclosed in which the second step is performed during the execution of the first step.
  • the manufacturing method of the conventional rubber mold 50 is shown.
  • the conventional injection molding apparatus 10 is shown.
  • An injection molding apparatus 10 according to an embodiment of the present invention is shown.
  • An exemplary suction device 40 is shown.
  • An exemplary rubber mold 50 is shown.
  • An exemplary rubber mold 50 is shown.
  • An exemplary method for manufacturing the rubber mold 50 is shown.
  • An exemplary shape of the member 65b corresponding to the wax blocking portion 54 is shown.
  • An exemplary wax injection method using the injection molding apparatus 10 is shown.
  • FIG. 3 shows an injection molding apparatus 10 according to an embodiment of the present invention.
  • the injection molding device 10 includes a main body device 20, a clamp unit 30, a suction device 40, and a rubber mold 50.
  • the main body device 20 has a tank 23 having a wax tank 21 and a vacuum tank 22, an injection unit (injection nozzle) 24, a first switch 25a, and a second switch 25b.
  • the molten wax is stored in the wax tank 21 in a pressurized state.
  • the main body device 20 may have a pressurizing source P such as a compressor connected to the wax tank 21 and a vacuum source V such as a vacuum pump connected to the vacuum tank 22.
  • the pressurizing source P is preferably a constant pressure pressurizing source, and particularly preferably a constant pressure air pressure source.
  • the wax tank 21 and the vacuum tank 22 may be arranged concentrically, and a band heater 23b for warming the entire tank 23 to an appropriate temperature and constantly dissolving the wax may be arranged around the tank 23.
  • the wax tank 21 and the vacuum tank 22 are connected to the injection unit 24 via the in-device pipes 21L and 22L and the first switch 25a.
  • the first switch 25a is -A state in which the injection unit 24 is separated from both the wax tank 21 and the vacuum tank 22 (state 1). -A state in which the injection unit 24 is connected only to the vacuum chamber 22 (state 2), or -A state in which the injection unit 24 is connected only to the wax tank 21 (state 3). It is possible to switch between the three states of.
  • the vacuum tank 22 is further connected to the external pipe 44 via the in-device pipe 22L and the second switch 25b.
  • the second switch 25b may be an open / closed (on / off) switch.
  • the clamp unit 30 has a table 31, a clamp force generator 32 such as a pneumatic cylinder, and a clamp plate 33, and the rubber mold 50 (and) between the table 31 and the clamp plate 33 by the force of the clamp force generator 32. Clamp the suction device 40).
  • the clamp unit 30 may further have a pressing mechanism 34 for aligning the rubber mold 50 with the axis of the injection portion 24 and / or pressing the rubber mold 50 against the injection portion 24.
  • the suction device 40 is a device for sucking air from the rubber mold 50.
  • FIG. 4 shows an exemplary suction device 40.
  • the suction device 40 of this example has a plate-like shape having an upper surface 41 on which the rubber mold 50 can be placed and a suction portion (suction port) 42 capable of contacting the suction port 53 of the rubber mold 50 mounted on the upper surface 41. It is a member.
  • the suction unit 42 can be connected to the vacuum tank 22 via the internal pipe 43, the external pipe 44, and the device internal pipe 22L.
  • the suction device 40 can be formed of acrylic resin or the like, and the suction portion 42, the internal piping 43, or the like can be formed by drilling or the like.
  • the internal pipe 43, the external pipe 44, and the device internal pipe 22L can be connected by a joint (not shown) or the like.
  • Figures 5 and 6 show an exemplary rubber mold 50.
  • the rubber mold 50 has a cavity 51, an injection port 52, a suction port 53, and a wax blocking portion 54.
  • the cavity 51 may have a shape corresponding to the prototype 1.
  • the cavity 51 is connected to the injection port 52 and the wax blocking portion 54, and the wax blocking portion 54 is connected to the suction port 53.
  • the injection port 52 can come into contact with the injection portion 24, and the suction port 53 can come into contact with the suction portion 42.
  • the wax blocking unit 54 has a function of blocking the passage of wax while allowing the passage of air.
  • An exemplary mechanism and structure by which the wax blocking section 54 achieves this function is as follows.
  • the temperature of wax used for manufacturing ornaments such as jewelry is usually around 75 ° C and is injected into the rubber mold 50, but the temperature of the rubber mold 50 is close to room temperature (20-40 ° C).
  • the wax gradually hardens from about 65 ° C and solidifies at about 60 ° C. At some temperature, the liquid does not suddenly turn into a solid. Wax has the property of poor heat conduction.
  • the part near the inner wall is immediately cooled to form a thin film. Since the film has poor thermal conductivity, the temperature of the wax flowing inside the film does not drop so much, and the wax fills every part inside the rubber mold 50 while forming the film one after another. Even so, the temperature of the wax flowing inside the rubber mold 50 gradually decreases, so it is necessary to increase the injection pressure in order to quickly fill the rubber mold 50 to a long distance.
  • this film is formed around the entire circumference perpendicular to the direction in which the wax flows, if the width of the passage is less than twice the thickness of this film (film thickness T), the wax cannot pass continuously.
  • film thickness T is about 0.1 mm and the width of the passage is about 0.2 mm, the wax cannot pass continuously and hardens immediately after passing a short distance.
  • the wax blocking unit 54 of the present invention can achieve the above function by using this principle.
  • this film is considered to be very thin because high-temperature wax passes one after another near the sprue, but the farther from the sprue, the lower the temperature of the passing wax and the smaller the flow rate, so the film tends to become thicker. It is in.
  • the wax blocking portion 54 is a rectangle with a cross section A ⁇ B and a length L
  • the above function is achieved by setting the dimension of A or B (vertical or horizontal dimension) to about twice the film thickness T. can.
  • the length L may be set to a sufficient length so as to prevent the passage of wax in consideration of the cross section A ⁇ B.
  • the cross-sectional shape of the wax blocking portion 54 is arbitrary, such as a circular shape, an elliptical shape, or an annular shape. That is, if the passage width is about twice that of the coating film, the wax cannot continuously pass through even if the cross section is not rectangular. Any shape may be used as long as it is easy to manufacture, the solidified wax can be easily taken out, and the rubber mold can be used continuously.
  • connection passage 55 is preferably connected to the cavity 51 at a portion where residual air tends to collect when the wax is injected (for example, a portion where the wax finally reaches, a portion where the wax merges). There is not always one place where residual air tends to collect. Therefore, it is preferable to provide a plurality of connection passages 55 and / or to connect to the cavity 51 at a plurality of locations.
  • connection passage 55 In the connection portion between the connection passage 55 and the cavity 51, since it is necessary to cut the unevenness after casting the precious metal to finish the cut surface, it is often impossible to connect the connection passage 55 to an important part of the design. For example, in the case of a ring such as a ring, since decorations and characters are designed on the outer circumference, the connection passage 55 cannot be connected to this portion. In such a case, as shown in FIG. 6, it is possible to connect to the inner circumference of the ring through a three-dimensional connection passage 55.
  • the rubber mold 50 has a notch 56.
  • the notch 56 facilitates removal of the solidified wax mold from the cavity 51.
  • the wax can also penetrate into the connecting passage 55, the wax blocking portion 54, the suction port 53, and the like and solidify. Therefore, it is desirable to further form a notch 56 that passes through the connecting passage 55, the wax blocking portion 54 and / or the suction port 53 (or reaches the connecting passage 55, the wax blocking portion 54 and / or the suction port 53).
  • the wax solidified in the connecting passage 55, the wax blocking portion 54 and / or the suction port 53 can be easily removed.
  • a single notch 56 (mainly for the purpose of taking out the wax mold) for separating the rubber mold 50 into the upper rubber mold 50a and the lower rubber mold 50b is shown.
  • One or more notches 56 may be additionally formed to achieve the objective. All or part of the notch 56 is a notch that completely separates the rubber mold 50, and all or part of the notch 56 is a notch that partially cuts the rubber mold 50 but does not completely separate it. obtain.
  • FIG. 7 shows an exemplary method for manufacturing the rubber mold 50.
  • Members 64a to 64c corresponding to the prototype 1, the runner 2a, and the sprue 2b are arranged inside the mold 63 guided by the guide pin 62 provided on the lower frame 61, and further, the suction port 53 and the wax blocking portion 54.
  • the members 65a to 65c corresponding to the connection passage 55 are arranged as shown in FIG.
  • Reference numeral 65d is a screw for fixing the members 65a and 65b. At this time, the member 65a corresponding to the suction port 53 is guided by the guide hole provided in the lower frame 61 so that the position can be specified.
  • the rubber mold 50 can be manufactured by taking out the rubber mold 50 from the mold and taking out various constituent materials 64a to 64c and 65a to 65d put inside while making an appropriate notch 56. can.
  • FIG. 8 shows an exemplary shape of the member 65b corresponding to the wax blocking portion 54.
  • the member 65b of FIG. 8A has a plate thickness of B, and a plurality of rectangular openings (indicated by hatched portions / width C ⁇ length L) are formed at intervals A.
  • the opening can be formed by hollowing out with a laser processing machine or the like.
  • the dimension A should be about twice or less than the film thickness T.
  • the length L is a length for ensuring that the wax hardens. The smaller the dimension A, the shorter the L may be. However, in order to secure the required air flow, it is necessary to increase the dimension B and / or increase the number of passages.
  • the member 65b of FIG. 8B has a plate shape of thickness A ⁇ width B
  • the member 65b of FIG. 8C has a ring shape of thickness A ⁇ circumference B
  • the wax blocking portion 54 is a passage having a cross section A ⁇ B and a length L.
  • the dimension A needs to be sufficiently small (for example, about 0.2 to 0.3 mm) to effectively block the passage of wax, and the width B or the circumference B is required to secure a sufficient air flow. Needs to be large.
  • the vertical or horizontal dimension (dimension A) of the cross section is preferably 3 times or less, more preferably 2.5 times or less, and 2.1 times or less the film thickness T. Is particularly preferable.
  • FIG. 9 shows an exemplary wax injection method using the injection molding apparatus 10.
  • the first switch 25a is in state 1, and the injection unit 24 is separated from both the wax tank 21 and the vacuum tank 22. Further, the second switch 25b is turned off.
  • the suction port 53 and the suction portion 42 are aligned and the rubber mold 50 is laminated on the upper surface 41 of the suction device 40.
  • the laminated body is placed on the table 31. It will be placed.
  • the clamping force generator 32 clamps the laminate between the table 31 and the clamp plate 33, aligns the injection port 52 of the rubber mold 50 with the injection portion 24, and the pressing mechanism 34 ejects the rubber mold 50. Press against the part 24.
  • step S5 the second switch 25b is turned on, air suction in the rubber mold 50 from the suction section 42 is started, and in step S6, the first switch 25a is switched to the state 2 and is switched from the injection section 24. Air suction in the rubber mold 50 of the above is started.
  • the first switch 25a is switched to the state 3 in step S7, and wax is injected from the injection unit 24 into the rubber mold 50.
  • step S7 After step S7 is executed for a sufficient time to sufficiently fill the cavity 51 with wax, the first switch 25a is switched to the state 1 in step S8, and the second switch 25b is turned off in step S9. Become. That is, the suction from the suction unit 42 continues from step S5 to step S9. In the following step S10, the clamp unit 30 presses the rubber mold 50 and releases the clamp.
  • step S11 the rubber mold 50 is removed from the clamp unit 30, and the wax mold is taken out from the rubber mold 50 after the wax has solidified.
  • steps S1 to S11 are executed using the same or different rubber molds 50.
  • Steps S1 to S11 may be carried out at the same time as appropriate, and / or the order may be changed. For example, steps S5 and S6 and / or steps S8 and S9 may be performed simultaneously or in reverse order.
  • wax injection (step S7) into the rubber mold 50 is executed during the continuation of air suction (steps S5 to S9) from the suction unit 42, so that the residual air in the cavity 51 is effective. Can be removed and / or the wax reaches every corner of the cavity 51 and / or the shape of the cavity 51 makes it possible to produce a more faithful wax mold.
  • connection passage 55 and the cavity 51 may be connected at the portion where the wax finally reaches or the portion where the wax merges.
  • the wax blocking portion 54 is arranged between the cavity 51 and the suction port 53, it is possible to prevent the wax intrusion / blockage of the suction portion 42 and the internal piping 43.
  • the injection part 24 shows an injection molding apparatus having two functions of an air suction function and a wax injection function, but the injection part has only a wax injection function and air suction is performed only from the suction part 42. May be configured to do.
  • the first switch 25a may be an on / off switch for opening and closing the in-device piping 21L
  • state 1 may be an off state
  • state 3 may be an off state
  • step S6 may be omitted.
  • the wax blocking portion 54 having a uniform cross section (A ⁇ B) in the length L direction is shown, but the cross section does not necessarily have to be uniform.
  • the dimensions, shape, arrangement, number, materials, injection molding method procedure, etc. of the injection molding apparatus or its elements can be changed in various ways.
  • the injection molding apparatus and injection molding method of the present invention can be used in lost wax casting for manufacturing small items such as jewelry and accessories and industrial products.
  • the production yield of the wax mold is improved and / or it becomes possible to manufacture the wax mold that is faithful to the cavity shape, and / or it is difficult with the prior art. It enables the production of wax molds having fine and / or complex shapes.
  • Suction port 54 Wax blocking part 55 ... Connection passage 56 ... Notch 61 ... Lower frame 62 ... Guide pin 63 ... Mold frame 64a ⁇ 64c, 65a ⁇ 65d ... Structure forming member 66 ... Rubber before vulcanization 67 ... Top lid

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un dispositif de moulage par injection 10 qui comprend : un réservoir de cire 21 qui stocke de la cire ; une partie d'injection 24 connectée au réservoir de cire ; une partie d'aspiration 42 apte à aspirer de l'air ; et un moule en caoutchouc 50 comprenant un orifice d'injection 52 apte à venir en contact avec la partie d'injection 24, un orifice d'aspiration 53 apte à venir en contact avec la partie d'aspiration 42, et une cavité 51 connectée à l'orifice d'injection 52 et à l'orifice d'aspiration 53. La cire dans le réservoir de cire 21 est injectée dans le moule en caoutchouc 50 depuis la partie d'injection 24 par la pression dans le réservoir de cire 21. La cavité 51 et l'orifice d'aspiration 53 permettent le passage d'air, et sont reliés par l'intermédiaire d'une partie de blocage de cire 54 qui bloque le passage de la cire.　
PCT/JP2020/001447 2020-01-17 2020-01-17 Dispositif et méthode de moulage par injection WO2021144947A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020530395A JP6756958B1 (ja) 2020-01-17 2020-01-17 射出成型装置及び方法
PCT/JP2020/001447 WO2021144947A1 (fr) 2020-01-17 2020-01-17 Dispositif et méthode de moulage par injection

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Application Number Priority Date Filing Date Title
PCT/JP2020/001447 WO2021144947A1 (fr) 2020-01-17 2020-01-17 Dispositif et méthode de moulage par injection

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WO2021144947A1 true WO2021144947A1 (fr) 2021-07-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004090308A (ja) * 2002-08-30 2004-03-25 Toshiba Corp 薄肉成形用金型および薄肉成形方法
JP2011178021A (ja) * 2010-03-01 2011-09-15 Sony Corp 射出成形用金型、射出成形用金型によって成形された成形品及び射出成形用金型を用いた成形品の成形方法
WO2017068670A1 (fr) * 2015-10-21 2017-04-27 株式会社エイシン技研 Machine à mouler la cire par injection et buse d'injection utilisée en moulage à cire perdue
CN106984769A (zh) * 2017-06-12 2017-07-28 浙江坤博机械制造有限公司 一种精密铸造用压蜡装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004090308A (ja) * 2002-08-30 2004-03-25 Toshiba Corp 薄肉成形用金型および薄肉成形方法
JP2011178021A (ja) * 2010-03-01 2011-09-15 Sony Corp 射出成形用金型、射出成形用金型によって成形された成形品及び射出成形用金型を用いた成形品の成形方法
WO2017068670A1 (fr) * 2015-10-21 2017-04-27 株式会社エイシン技研 Machine à mouler la cire par injection et buse d'injection utilisée en moulage à cire perdue
CN106984769A (zh) * 2017-06-12 2017-07-28 浙江坤博机械制造有限公司 一种精密铸造用压蜡装置

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JPWO2021144947A1 (fr) 2021-07-22

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