WO2013140580A1 - 金型内の気体放出構造及び当該構造を備えた金型 - Google Patents

金型内の気体放出構造及び当該構造を備えた金型 Download PDF

Info

Publication number
WO2013140580A1
WO2013140580A1 PCT/JP2012/057370 JP2012057370W WO2013140580A1 WO 2013140580 A1 WO2013140580 A1 WO 2013140580A1 JP 2012057370 W JP2012057370 W JP 2012057370W WO 2013140580 A1 WO2013140580 A1 WO 2013140580A1
Authority
WO
WIPO (PCT)
Prior art keywords
sliding member
molten material
gas discharge
mold
flow
Prior art date
Application number
PCT/JP2012/057370
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
輝彦 齋藤
Original Assignee
株式会社斎藤金型製作所
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 株式会社斎藤金型製作所 filed Critical 株式会社斎藤金型製作所
Priority to JP2013539832A priority Critical patent/JP5509477B2/ja
Priority to KR1020127011170A priority patent/KR20140138376A/ko
Priority to PCT/JP2012/057370 priority patent/WO2013140580A1/ja
Publication of WO2013140580A1 publication Critical patent/WO2013140580A1/ja

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/067—Venting means for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating
    • 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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/65—Means for releasing gas trapped between glass and press die
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present invention relates to a molten material filling space (hereinafter referred to as “cavity”) of a mold used for injection molding various plastics, ceramics, rubber-based materials, glass-based materials, etc., or die-casting metals or alloys.
  • the internal appearance of the molded product is improved by reducing the adverse effects of the gas generated from the molten material and the residual air in the space (hereinafter also referred to as “gas”) on the molded product.
  • the present invention relates to a gas discharge structure in a mold for greatly reducing generation and a mold having the structure, and in particular, gas gas is surely discharged to the outside and outflow of molten material to the outside is surely prevented.
  • the present invention relates to a gas discharge structure in a mold and a mold including the structure.
  • the mold cavity is precision finished to improve the properties and appearance of the product surface, and the joint surface of the fixed / movable mold is processed so as to be intimately sealed. Furthermore, in order to improve the airtightness of the joint surface of the fixed / movable mold, an elastic packing or the like may be interposed.
  • the molten material enters, and burrs and cast holes (unevenness) are generated on the surface of the molded product, thereby lowering the product quality.
  • Patent Document 1 In order to eliminate the adverse effects of the gases confined in the cavity as described above, the inventor disclosed in Patent Document 1 that the tip of the melt-molding material that flows in the mold without using an external control means. A gas discharge structure inside a filling space of a mold that automatically operates by a pressing force and a mold having the gas discharge structure are proposed.
  • the gas discharge structure proposed here is a sliding member that receives a pressing force by the elastic body 14 from the opposite surface side, and has a bottomed hole 12 formed in the flow direction R of the molten material. And a sliding member 10 having at least one side opening 13 communicating with the bottomed hole and opening in a direction crossing the flow direction of the molten material, and the sliding member parallel to the flow direction of the molten material. Slidably received in the direction and communicated with the side opening 13 of the sliding member in an initial state where the molten material is not subjected to the flow pressure, and then the sliding member is elasticized by the flow front end of the molten material.
  • a gas discharge structure in a mold comprising a sliding member receiver 20 having a gas discharge port 21 that is closed when it is slid in a direction against the body, and includes a fixed mold and a movable mold.
  • the filling space formed It is configured to be mounted near the middle or end of the molten material flow passage connected to the filling space.
  • Patent Document 1 in order to prevent a low-viscosity molten material having a high flow rate from flowing out together with gases discharged to the outside through communication between the side opening and the gas discharge port, A configuration is adopted in which the shape of the gas flow path of at least one of the discharge port and the side surface opening is formed in a non-linear shape.
  • the gas discharge structure proposed here is based on the premise that the sliding member moves (actuates) by the pressing force of the tip of the molten material flow, and slides with the sliding member receptor on the bottom surface of the sliding member. No gradient is formed on the surface, and no gap is formed at the upper end portion where the flow front end portion of the molten material enters.
  • the inventor conducted further experiments and research and development on the gas discharge structure and the mold having the gas discharge structure, and as a result, a low-viscosity molten material having a high flow rate (for example, nylon used for connector products).
  • the tip of the molten material flow abuts. It has led to the development of a structure that increases the intrusion part and a gas discharge structure that expands the volume of the space (filling space) into which the molten material flows. Furthermore, as a countermeasure to take out the molten material that has flowed into the filling space such as the bottomed hole and side opening of the sliding member, and as a countermeasure in the event that the molten material gets into the gas discharge port, accept the sliding member.
  • a gas discharge structure has been developed in which a hole for inserting an ejector pin, also called an extrusion pin, is opened on the bottom of the body, and the filled molten material is pushed out by the ejector pin.
  • An object of the present invention is a gas discharge structure inside a filling space of a mold that is automatically operated by a pressing force of a front end portion of a molten molding material that flows in the mold without using an external control means.
  • a gas discharge structure configured to reliably operate a sliding member by a pressing force of a front end portion of a material flow, and to reliably prevent outflow of a molten material to the outside, and a mold including the gas discharge structure. That is.
  • die used as the object of this invention is not limited to the metal mold
  • the invention according to claim 1 is a sliding member that receives a pressing force by the elastic body 14 from the opposite surface side, and communicates with the bottomed hole 12 formed in the flow direction of the molten material and the bottomed hole, and A sliding member 10 having at least one side opening 13 that opens in a direction crossing the flow direction R of the molten material, and the sliding member is slidably received in a direction parallel to the flow direction R of the molten material.
  • the sliding member In the initial state where the molten material is not subjected to the flow pressure, the sliding member communicates with the side opening of the sliding member, and then the sliding member slides in a direction against the elastic body by the flow front end of the molten material.
  • a sliding member receiver 20 having a gas discharge port 21 that is closed when squeezed, and a gas discharge structure in a mold, the filling space formed by a fixed mold and a movable mold, or the Molten element connected to the filling space
  • the upper end portion of the sliding member on the front surface 16 of the sliding member between the left and right inner side surfaces 22 and 23 of the sliding member receiver A gap S1 into which the flow front end of the molten material enters is formed in a section extending from the upper end to the lower end, and the sliding surface with the sliding member receiver on the bottom surface 17 of the sliding member extends from the upper end to the lower end.
  • An inclined surface SF1 that forms an inward gradient is formed, and the gap S1 is opened in an initial state where the molten material does not receive a flow pressure. After that, the sliding member is moved to the elastic body 14 by a flow front end of the molten material.
  • the gas discharge structure in the mold is configured such that the gap S1 is sealed as it slides in the direction D to resist.
  • the invention according to claim 2 is a sliding member that receives a pressing force by the elastic body 14 from the opposite surface side, and communicates with the bottomed hole 12 formed in the flow direction of the molten material and the bottomed hole, and A sliding member 10 having at least one side opening 13 that opens in a direction crossing the flow direction R of the molten material, and the sliding member is slidably received in a direction parallel to the flow direction R of the molten material.
  • the sliding member In the initial state where the molten material is not subjected to the flow pressure, the sliding member communicates with the side opening of the sliding member, and then the sliding member slides in a direction against the elastic body by the flow front end of the molten material.
  • a sliding member receiver 20 having a gas discharge port 21 that is closed when squeezed, and a gas discharge structure in a mold, the filling space formed by a fixed mold and a movable mold, or the Molten element connected to the filling space
  • the vertical size of the bottomed hole 12 of the sliding member is the length extending from the front surface 16 to the bottom surface 17 of the sliding member.
  • L is a gas discharge structure in the mold configured to expand the volume of the bottomed hole in order to increase the pressing force of the molten material flow against the sliding member.
  • the left and right inner side surfaces 22 and 23 of the sliding member receiver Between each of the left and right outer surfaces 18 and 19 of the sliding member, gaps S2 and S3 into which the flow front end of the molten material enters in a section from the front surface 16 to the bottom surface 17 of the sliding member are formed.
  • a curved or linear inclined surface SF2 that forms a gradient toward the inside of each of the left and right inner surfaces 22 and 23 of the sliding member receiver in an arbitrary section between the portion and the formation position of the gas discharge port 21;
  • the left and right outer surfaces 18, 19 of the sliding member are inclined surfaces SF4, SF5 that engage with the inclined surfaces SF2, SF3, and both the inclined surfaces SF2, 3 and SF4, 5,
  • the gap S between The gaps S4 and S5 communicating with S3 are formed, and the gaps S2 and S3 are opened in the initial state where the molten material is not subjected to the flow pressure.
  • the two inclined surfaces SF2 and SF4 and SF3 and SF5 are closely engaged with each other as they are slid in the direction D against the elastic body 14, so that the gaps S4 and S5 are sealed. It is characterized in that it is a gas discharge structure in the formed mold.
  • the sliding member between the left and right inner side surfaces 22 and 23 of the sliding member receiver is further provided.
  • a gap S1 into which the flow front end of the molten material enters is formed in a section from the upper end portion to the lower end portion of the sliding member on the front surface 16, and a sliding surface with the sliding member receiver on the bottom surface 17 of the sliding member. Is an inclined surface SF1 that forms an inward gradient from the upper end to the lower end, and the gap S1 is opened in an initial state where the molten material is not subjected to the flow pressure, and then the sliding member is made of the molten material.
  • the gas discharge structure in the mold is configured such that the gap S1 is sealed as it is slid in the direction D against the elastic body 14 by the flow front end portion.
  • the ejector pin EP1 that is communicated with the bottomed hole 12 is inserted into the bottom 24 of the sliding member receiver.
  • An opening 26 is formed which communicates with the opening 25 and / or the gas discharge port 21 and through which the ejector pin EP2 is inserted.
  • the bottomed hole 12, the side opening 13 and / or the gas discharge port 21 are filled with the ejector pin inserted. It is a gas discharge structure in a mold configured to take out the molten material RF.
  • the elastic body 14 that presses the sliding member 10 against the opposing surface in the gas discharge structure in the mold according to any one of the first to fifth aspects is a coil spring or a leaf spring.
  • the present invention is characterized in that it is a gas discharge structure in a mold composed of one or a plurality of combinations selected from rubber-based elastic bodies and fluid compression actuators.
  • the side opening 13 formed in the sliding member 10 in the gas discharge structure in the mold according to any one of the first to sixth aspects and the sliding member receiver 20 are provided. It is a gas discharge structure in a mold in which a plurality of combinations with the formed gas discharge ports 21 are formed.
  • a mold in which the gas release structure in the mold according to any one of the first to seventh aspects can be fitted into a mounting recess formed at a required portion in the mold. It is a gas discharge structure in the mold.
  • the gas discharge port 21 in the gas discharge structure in the mold according to any one of the first to eighth aspects is formed as a non-linear or sloped linear gas flow passage. It is the gas discharge structure in the metal mold
  • the gas release structure in the mold according to the first to ninth aspects is a filling space formed by a fixed mold and a movable mold, or a molten material flow path connected to the filling space.
  • a mold that is integrally arranged in advance In the middle or near the end of the mold, it is a mold that is integrally arranged in advance.
  • the gas release structure in the mold according to the present invention is a mold essential for injection molding, die casting molding, etc., in the middle of the molten material flow path located on the side far from the gate or in the vicinity of the end of the molten material flow Is attached to a portion that receives a pressing force.
  • a flow analysis using a computer can be used.
  • Such a gas discharge structure has a sliding member 10 that is moved by the pressing force of the tip of the molten material flow, and shows the pressing force in a direction that opposes the sliding member from the opposing surface to the tip of the molten material flow.
  • a sliding member receiver 20 provided with an elastic member 14.
  • the sliding member is formed with a bottomed hole (vertical bottomed hole) 12 on the front surface in contact with the tip of the flowing molten material flow, and the bottomed hole communicates with at least one side opening 13. ing.
  • the side surface opening 13 communicates with the gas discharge port 21 formed in the sliding member receiver 20 until the sliding member 10 is pressed by the tip of the flowing molten material flow, The gas can be released freely without any resistance toward the outside. After that, when the molten material is filled into the cavity and the sliding member 10 is pressed by the molten material flow tip and retracted against the elastic member 14, the gas discharge port 21 is closed and the outflow of the molten material flow is blocked.
  • a low-viscosity molten material with a high flow rate such as nylon and LCP used in connector products
  • a weak pressing force required to move (activate) the sliding member In some cases, the molten material flows out of the communication hole together with the gases without being blocked. Therefore, it is necessary to press the sliding member 10 with the tip of the molten material flow and operate it reliably to prevent the molten material from flowing out.
  • metals such as aluminum and aluminum alloys with low viscosity are high speed, plastics, ceramics, rubbers, etc. are known to be relatively slow, and plastics, metals, rubbers, etc.
  • the operating pressing force of the sliding member having the gas discharge structure according to the present invention is executed by so-called self-force control that is directly determined by the flow front of the molten material.
  • the present invention forms a gap S1 in the front surface 16 of the sliding member in which the flow front end of the molten material enters from the upper end portion to the lower end portion of the sliding member. Further, the volume of the bottomed hole is enlarged by setting the vertical size L of the bottomed hole 12 of the sliding member to a length extending from the front surface 16 to the bottom surface 17 of the sliding member. Then, in the upper end portion of the gas discharge structure, gaps S2, S3 are provided in the section from the front surface to the bottom surface of the sliding member between the inner surfaces 22, 23 of the sliding member receiver and the outer surfaces 18, 19 of the sliding member. Further, gaps S4 and S5 communicating with these are formed. With such a configuration, in the present invention, the inflow portion of the molten material flow is expanded so that the sliding member can be operated reliably, and the outflow of the molten material can be reliably prevented.
  • the molten material may flow out to form the gap as described above. Therefore, by configuring the sliding surface with the sliding member receiver on the bottom surface 17 of the sliding member to be an inclined surface SF1 with an inward gradient from the upper end to the lower end, the sliding member is The gap S1 is sealed as it is operated by the flow front end of the molten material, and the molten material can be reliably prevented from flowing out.
  • both inner side surfaces 22 and 23 of the sliding member receiver with the gaps S4 and S5 interposed therebetween are curved or linear inclined surfaces SF2 and SF3 forming an inward gradient, and both outer side surfaces 18 of the sliding member.
  • an opening 25 that communicates with the bottomed hole 12 and through which the ejector pin EP1 is inserted and an opening 26 that communicates with the gas discharge port 21 and through which the ejector pin EP2 is inserted are formed in the bottom 24 of the sliding member receiver. Forming, or forming only the opening 25 or only the opening 26 and extruding and extracting the molten material RF filled in the bottomed hole, the side opening 13 or the gas discharge port 21 by the ejector pin to be inserted.
  • the present invention configured as described above the occurrence of product defects due to the occurrence of short shots, cast holes, burrs, and the like on the molded product is greatly reduced, which can contribute to productivity improvement.
  • Such a gas discharge structure in the mold can be prepared in advance as a standard product having typical outer dimensions.
  • a recess as a mounting portion that can receive this standard product is formed in a required portion at the time of mold production, and can be fitted and mounted by screwing or the like afterwards.
  • the manufacturing process of the mold body may be performed separately according to a conventional method except for the formation of the mounting recess.
  • the gas discharge structure according to the present invention configured in the standard form as described above can be configured to be detachable from the mounting recess formed in this way. Therefore, the gas discharge structure is prepared in advance as a single unit and can be mounted on a mold having a mounting recess, so that work efficiency can be improved and material costs and manufacturing man-hours can be reduced. If a gas discharge structure is unnecessary depending on the type and characteristics of the molten material to be molded, a dummy (blind member) formed with the same outer shape may be fitted and fixed.
  • the gas release structure according to the present invention can be removed from the old mold at the time of manufacturing a new mold by changing the model of the product, etc. It can be attached and reused, and it can save resources, labor, and costs, so it has a great economic effect.
  • a mold that incorporates a gas discharge structure with the same structure from the beginning is manufactured integrally. can do.
  • die which concerns on this invention
  • (A) is a top view in an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) is The front view which shows the state with which the molten raw material after an action
  • (D) is a center sectional view of (B)
  • (E) is a center sectional view of (C).
  • die which concerns on this invention
  • (A) is a top view which shows an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) Is a front view showing a state in which the molten material after operation is filled
  • (D) is a central sectional view of (B)
  • (E) is a central sectional view of (C).
  • die which concerns on this invention
  • (A) is a top view which shows an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) Is a front view showing a state in which the molten material after operation is filled
  • (D) is a central sectional view of (B)
  • (E) is a central sectional view of (C).
  • die which concerns on this invention
  • (A) is a top view which shows an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) Is a front view showing a state in which the molten material after operation is filled
  • (D) is a central sectional view of (B)
  • (E) is a central sectional view of (C).
  • die which concerns on this invention
  • (A) is a top view which shows an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) Is a front view showing a state in which the molten material after operation is filled
  • (D) is a central sectional view of (B)
  • (E) is a central sectional view of (C).
  • A) is a front view which shows the state with which the melted material after an action
  • (B) is a center sectional drawing of FIG.
  • the figure which shows the state which inserted the ejector pin in (C) is a figure which shows the state which extrudes the molten raw material with which the bottomed hole and side opening and the gas discharge port were filled with an ejector pin
  • (D) is the fusion
  • FIG. 1 It is a figure which shows the other structural example of the bottomed hole of the gas discharge
  • (A) is a top view which shows an initial state
  • (B) is the front which shows the gas discharge state in an initial state
  • (C) is a front view showing a state in which a molten material after operation is filled
  • (D) is a central sectional view of (B)
  • (E) is a central sectional view of (C).
  • FIG. 1 It is a figure which shows the structure of the gas discharge
  • (A) is a top view which shows an initial state
  • (B) is a front view which shows the gas discharge state in an initial state
  • (C) is an action
  • (D) is a center sectional view of (B)
  • (E) is a center sectional view of (C).
  • FIG. 1 is a diagram showing Example 1 of a gas discharge structure, a plan view in an initial state (A), a front view showing a gas discharge state in an initial state (B), a state in which a molten material after operation is filled ( It is the front view (C) which shows the state where the gas flow passage was obstructed), the central section (D) of Drawing B, and the central section (E) of Drawing C.
  • A plan view in an initial state
  • B a front view showing a gas discharge state in an initial state
  • It is the front view (C) which shows the state where the gas flow passage was obstructed
  • D central section
  • E central section
  • the gas discharge structure includes a sliding member 10 having a bottomed hole 12 and a side opening 13 and receiving a pressing force by an elastic body 14 and a gas discharge port 21.
  • a sliding member receiver 20 having, a slant surface formed on a clearance S1 (hereinafter also simply referred to as “gap S1”) and a sliding member bottom surface (sliding surface) 17 into which the flow front end of the molten material enters.
  • SF1 (hereinafter, also simply referred to as “inclined surface SF1”) is used.
  • the gas discharge structure according to the present invention is a vertical shape
  • the bottomed hole is expressed vertically and the sliding direction of the sliding member is expressed as a vertical direction as indicated by an arrow D.
  • the gas discharge structure according to the present invention is a horizontal type and a diagonal type
  • the horizontal and diagonal directions are respectively horizontal and diagonal directions. The same applies to the following description.
  • the upper end of the sliding member 10 is formed to receive the gas flowing from the upper side of the drawing as shown by arrows G and R and the flow front of the molten material.
  • the sliding member 10 Prior to the approach of the tip of the molten resin or the like, the sliding member 10 has a semicircular vertically-bottomed bottomed hole 12 for allowing a gas composed of mixed air and generated gas to flow therethrough.
  • at least one side opening 13 is formed that communicates with a lower end of the lower end.
  • expressions such as “vertical direction” and “upward” are merely representations of the state illustrated in the accompanying drawings, and are not related to the posture and arrangement in the actual use state.
  • one side opening 13 is formed on each of the left and right sides.
  • the bottom of the bottomed hole has a semicircular shape. The shape is not limited and can be triangular, quadrangular, or the like.
  • the sliding member 10 is positioned upward as shown in the drawings (B, D) by the elastic body 14 in the initial state where no external force is applied, and the side opening 13 and the gas discharge port 21 are in communication with each other. ing.
  • the sliding member 10 and the sliding member receiver 20 can be divided at arbitrary portions, one of which is a fixed mold. It is desirable to divide and attach the other side to the movable mold side.
  • the side opening 13 and the gas discharge port 21 can be formed as a groove-like body not by drilling but by opening.
  • the fixed mold side and the movable mold side are overlapped and integrated.
  • the sliding member receiver 20 is slidable by being supported by a guide groove, a drop-off prevention frame, etc. (not shown) in contact with the three sides of the left and right outer surfaces and the bottom surface 17 of the sliding member 10. Receiving voids are formed to accept them.
  • a sliding member receiving body 20 (see FIGS. B and D) below the lower end of the sliding member 10 is formed so as to extend a space for allowing sliding, and the inside of the sliding member receiver 20 (see FIGS. B and D) extends.
  • An elastic body 14 that presses the moving member 10 upward is interposed.
  • Examples of the elastic body 14 that presses the sliding member 10 according to the present invention against the opposing surface include a coil spring, a leaf spring, a rubber-based elastic body, a fluid compression actuator, and the like. Can be adopted. Further, the combination of the side opening 13 formed in the sliding member 10 and the gas discharge port 21 formed in the sliding member receiver 20 is not limited to one set, and a plurality of sets may be formed. Furthermore, the gas discharge structure according to the present invention can be configured so as to be fitted into a mounting recess formed at a required portion in the mold.
  • the sliding member receiver 20 is provided with one gas discharge port 21 at least partially engaged with the side opening 13 of the sliding member 10 on the left and right sides in accordance with the side opening 13 of the sliding member 10 in the drawing. .
  • One gas discharge port 21 on each of the left and right sides of the sliding member receiving body 20 has a side opening 13 on the sliding member 10 while the sliding member 10 is pushed upward by the pressing force of the elastic body 14 as described above. And communicate with each other. Therefore, various gases such as residual air and gas generated from the molten material when the molten material is press-fitted from a nozzle of an injection molding machine, a die-casting machine, etc. are shown in FIG.
  • the gas discharge port is formed on the same plane as the side opening in the figure, the gas discharge port may be configured to communicate with the side opening and formed three-dimensionally on the upper side or the lower side. it can.
  • the gap S1 into which the flow front end portion of the molten material enters is the entire surface of the front surface 16 of the sliding member, that is, the surface from the upper end portion to the lower end portion of the sliding member, and the left and right inner surfaces of the sliding member receiver. Between 22 and 23, it forms in the state dented from the front surface of the sliding member receiver.
  • the bottom surface 17 of the sliding member that contacts (slids) the sliding member receptor is an inclined surface SF1 that forms an inward gradient from the upper end to the lower end. As shown in FIG. 4D, the gap S1 is opened in an initial state where the molten material is not subjected to the flow pressure, and the gases are discharged from the gas discharge port.
  • the sliding member is elasticized by the flow tip of the molten material.
  • the sliding member moves in the front direction and the gap S1 is sealed and melted as shown in FIG. Outflow of material to the outside will be prevented.
  • the width of the gap S1 is preferably about 1/1000 to 7/100, more preferably about 2/1000 to 5/100, although it depends on the size of the gas release structure.
  • the inclination angle of the inclined surface SF1 is preferably about 0.5 to 2 degrees, more preferably about 0.1 to 1 degree.
  • the gap interval and the gradient amount of the inclined surface are determined in accordance with the type and properties of the molten material such as resin.
  • the figures (C, E) show the state where the flow front end of the molten material such as resin has reached from the upper side as indicated by the arrow R with respect to the gas release structure shown in the figures (A, B, D). is there.
  • the sliding member 10 starts to move (actuate) downward as indicated by an arrow D, and the elastic body 14 disposed on the lower surface of the sliding member 10 is compressed and pushed down to open the side surface of the sliding member. 13 and the gas discharge port 21 of the sliding member receptor shift from the communicating state to the closed state. Accordingly, subsequent flow of the molten material flow or leakage to the outside is prevented, and good molding results can be expected.
  • the gas release structure in the mold according to the present invention is divided into a fixed mold side and a movable mold side as shown by a two-dot chain line in FIG.
  • the number of the cut grooves between the side opening 13 and the gas discharge port 21, the width, the depth, etc. are changed by, for example, providing a difference between the fixed mold side and the movable mold side.
  • the flow resistance can be adjusted in various ways. In FIG. (A) (FIGS. 2, 3, and 4 are the same), the upper side is the fixed mold side and the lower side is the movable mold side, but the reverse is arbitrary.
  • FIG. 2 is a view showing Example 2 of the gas discharge structure according to the present invention.
  • FIGS. (A) to (E) are a plan view, a front view, and a cross-sectional view
  • FIG. E) shows the state where the flow front end of the molten material has reached the gas release structure shown in the drawings (A, B, D).
  • the same reference numerals as those in FIG. 1 are omitted.
  • the description of the same configuration, operation, etc. as in the first embodiment of FIG. 1 is omitted, and the configuration, operation, etc., different from the first embodiment will be described.
  • the gas discharge structure includes a sliding member 10 having a bottomed hole 12 and a side opening 13 and receiving a pressing force by an elastic body 14 and a gas discharge port 21.
  • the vertical size (vertical width) of the bottomed hole 12 of the sliding member is changed from the front surface 16 to the bottom surface of the sliding member, as particularly shown in FIGS.
  • the length of the bottomed hole into which the molten material flow enters is expanded as the length L over the section reaching 17. In this way, by expanding the portion into which the molten material flow enters, the pressing force of the molten material flow can be increased and the sliding member can be operated reliably.
  • FIG. 3 is a view showing Example 3 of the gas discharge structure according to the present invention.
  • FIGS. (A) to (E) are a plan view, a front view, and a cross-sectional view
  • FIG. E) shows the state where the flow front end of the molten material has reached the gas release structure shown in the drawings (A, B, D).
  • the same reference numerals as those in FIG. 1 are omitted.
  • the description of the same configuration, operation, etc. as in the first embodiment of FIG. 1 is omitted, and the configuration, operation, etc., different from the first embodiment will be described. As shown in FIG.
  • the gas discharge structure according to Example 3 of the present invention has the same structure as that of Example 2 in which the vertical width of the bottomed hole is expanded and the volume is expanded, The gaps S2 and S3 into which the flow front end portion enters and the gaps S4 and S5 communicating with the gaps are formed, and the inclined surfaces SF2, SF3, SF4, and SF5 are formed.
  • the gaps S2 and S3 are formed between the inner surface 22 of the sliding member receiver and the outer surface 18 of the sliding member at the upper end of the gas release structure, and between the sliding member receiver.
  • the inner side surface 23 of the sliding member and the outer side surface 19 of the sliding member are respectively formed over a section from the front surface 16 to the bottom surface 17 of the sliding member.
  • the gaps S4 and S5 communicate with the gaps S2 and S3, respectively, and are formed between the inclined surfaces SF2 and SF4 and between SF3 and SF5, respectively, as shown in FIG. In this way, the sliding member can be reliably operated by increasing the gap serving as a portion into which the molten material flow enters.
  • the inclined surface SF2 is curved or curved with an inward gradient in an arbitrary section from the upper end portion of one inner surface 22 of the sliding member receiver to the formation position of the gas discharge port 21.
  • the inclined surface SF3 is formed in a straight line, and is curved or straight with an inward gradient in an arbitrary section from the upper end of the other inner surface 23 of the sliding member receiver to the formation position of the gas discharge port 21. It is formed.
  • the inclined surfaces SF2 and SF3 are not limited to a curved shape or a straight shape, and may be a surface obtained by joining a vertical surface and a flat surface.
  • the inclined surface SF4 is formed on one outer surface 18 of the sliding member so as to engage with the inclined surface SF2 when the sliding member moves in the direction D
  • the inclined surface SF5 is one of the sliding members. Is formed in a shape that engages with the inclined surface SF3 when the sliding member moves in the direction D.
  • both the gaps S2, S3 are opened, and then the inclined surfaces SF2, SF4, SF4, SF4 and SF4, respectively, as the flow front end of the molten material flows from the gaps S2, S3 and the sliding member moves in the direction D.
  • SF3 and SF5 are intimately engaged and tightly closed, so that the gaps S4 and S5 are sealed, and the outflow of the molten material can be reliably prevented.
  • the sliding member can be reliably operated and the molten material can be reliably prevented from flowing out.
  • the gaps S2 and S3 at the upper end of the sliding member are not formed, but the gaps 4 and 5 can be formed.
  • FIGS. 4A to 4E are a plan view, a front view, and a cross-sectional view
  • the figures (C, E) show the state where the flow front end of the molten material has reached the gas release structure shown in the figures (A, B, D).
  • the same reference numerals as those in FIG. 1 are omitted.
  • the description of the same configuration, operation, etc. as in the first embodiment of FIG. 1 is omitted, and the configuration, operation, etc., different from the first embodiment will be described.
  • the gas discharge structure according to the fourth embodiment of the present invention is obtained by further adding a gap S ⁇ b> 1 and an inclined surface SF ⁇ b> 1 to the second embodiment in which the volume of the bottomed hole is expanded.
  • the gas release structure according to the fifth embodiment of the present invention further includes the gap S1 and the inclined surface SF1 in the third embodiment in which the gaps S2 to S5 and the inclined surfaces SF2 to 5 are formed. Is added. Since the configurations of the embodiments 2 and 3 have been described above, the description thereof will be omitted. With such a configuration, it is possible to further increase the portion into which the molten material flow enters to operate the sliding member reliably and to prevent the molten material from flowing out to the outside.
  • FIG. 6A and 6B are diagrams showing Embodiment 6 of the gas discharge structure according to the present invention, in which FIG. 6A is a front view showing a state in which a molten material after operation is filled, and FIG. 6B is a central cross section of FIG.
  • FIG. 4 is a diagram showing a state where ejector pins EP1 and EP2 are attached
  • (C) is a diagram showing a state in which molten material RF filled in a bottomed hole, a side surface opening, and a gas discharge port is pushed out by an ejector pin;
  • the gas discharge structure according to Embodiment 6 of the present invention is the gas discharge structure according to Embodiments 1 to 5 described above. As shown in FIG. 6, the bottom hole, the side opening, and the gas discharge port are melted. A configuration in which ejector pins EP1 and EP2 for taking out the material are further added.
  • the ejector pin EP1 is inserted through an opening 25 formed in the bottom portion 24 of the sliding member receiver and communicated with the bottomed hole 12, and the molten material RF filled in the bottomed hole 12 and the side surface opening 13 is extruded and taken out.
  • the ejector pin EP2 is inserted through an opening 26 formed in the bottom 24 of the sliding member receiver and communicating with the gas discharge port 21, and the molten material RF filled in the gas discharge port is extruded and taken out. .
  • the ejector pin EP2 is a means for taking out when the molten material temporarily enters the gas discharge port through the gap.
  • the ejector pin EP2 is only inserted through the opening 26 and is not taken out.
  • FIG. 7A and 7B are diagrams showing Embodiment 7 of the gas discharge structure according to the present invention
  • FIG. 7A is a plan view showing an initial state of another configuration example in which no gap is formed in the upper end portion in Embodiment 3
  • FIG. I s a front view showing a configuration example in which the gas discharge state in the initial state and the gas discharge port are made non-linear.
  • C is a configuration example in which the gas discharge state in the initial state and the gas discharge port are made linear with a gradient.
  • FIG. The reference numerals of the same parts as those in FIGS. 1 to 5 are omitted. Further, the description of the configuration, operation, etc. of Embodiments 1 to 5 is omitted.
  • the gas release structure according to Example 7 of the present invention is configured such that no gap is formed at the upper end portion in Example 3 as shown in FIG. Even with such a configuration, it is possible to reliably operate the sliding member and to prevent the molten material from flowing out to the outside.
  • the gas discharge port 21 formed in the sliding member receiver 20 in the gas discharge structure according to the seventh embodiment of the present invention is non-linear as shown in FIG. As shown, it is formed as a straight gas flow passage with an upward gradient. The linear gradient may be directed downward. It is necessary to determine the position of the screw hole for attaching the gas discharge structure to the mold each time depending on the size of the mold and the gas discharge structure, the mounting location of the gas discharge structure, and the like. Therefore, it is preferable that the shape of the gas discharge port can be changed to a flat linear shape, a linear shape with a gradient, a non-linear shape, or other shapes. Such a shape of the gas discharge port is also applied to the first to fifth embodiments.
  • the lengths of the side opening and the gas discharge port can be extended, and the following configuration can be adopted. it can.
  • the amount of gas released to the outside in this way, it is possible to prevent the low-viscosity molten material having a high flow rate from flowing out.
  • the gas discharge port 21 is closed, and the outflow of the molten material flow is blocked.
  • plastics, ceramics, rubbers, etc. plastics, ceramics, rubbers, etc.
  • the gas discharge effect from the gas discharge port 21 can be changed according to the viscosity of the molten material.
  • the amount of gas discharged to the outside is adjusted by making the shape of the gas flow passage of at least one of the gas discharge port 21 and the side opening 13 non-linear, for example, a key shape, a substantially triangular shape with a tapered tip.
  • a key shape for example, a key shape, a substantially triangular shape with a tapered tip.
  • the cross-sectional area of the opening formed by the gas discharge port 21 and the side opening 13 so as to change over time according to the amount of movement of the sliding member 10, the same effect as described above can be obtained. Obtainable.
  • the side opening 13 is slid as two or more openings of a large flow opening and a small flow opening having different inner diameters, or three openings such as a large flow opening, a medium flow opening, and a small flow opening.
  • a conduction state with the outside is formed.
  • release amount of gas changes with time, and finally reaches
  • the number of openings, their respective dimensions, the distance between adjacent openings, etc. may be determined in consideration of the viscosity of the molten material, the amount of gas generated, etc. in consideration of molding conditions such as heating temperature and residence time.
  • one of the gas discharge port 21 and the side surface opening 13 is formed as a plurality of openings having different dimensions, and the substantial opening area determined by the size and / or ratio of the opening that engages with the other opening at that time.
  • the size of the opening and the like may be determined in consideration of the viscosity of the molten material, the amount of gas generated, etc. under the molding conditions of each molten material.
  • the flow and blockage of the gas are controlled by the opening and closing of the opening on the sliding surface of the side opening 13 formed in the sliding member 10 and the gas discharge port 21.
  • the sliding member It is also possible to form a round hole with a step or a throttle on the inner diameter on the side and project the round bar from the lower side of the sliding member receiver 20 to realize release / blocking. In such a configuration, when the sliding member 10 is in the initial state, the tip of the round bar on the sliding member receiver 20 side is located at the large diameter portion of the round hole, so that the flow of the gas component is free. is there. However, when the flow front end R of the molten material presses the sliding member 10 as shown in FIG.
  • FIG. 8 is a view showing another configuration example of the bottomed hole of the gas discharge structure according to the present invention.
  • FIGS. (A) to (E) are a plan view, a front view, and a sectional view.
  • (C, E) shows the state where the flow front end of the molten material has reached the gas release structure shown in the diagrams (A, B, D).
  • the same reference numerals as those in FIG. 1 are omitted.
  • the bottomed hole according to this configuration example is partitioned from the sliding member receiver by narrowing the bottomed hole part where the gas and the molten material abut at the upper end part of the sliding member as shown in FIG.
  • the volume of the bottomed hole is expanded with the space ES into which the molten material flows in the lower part as the vertical width similar to that of the second embodiment.
  • the gap S1 and the inclined surface SF1 of the first embodiment may be added. Even with such a configuration, the smooth operation of the sliding member can be secured and the outflow of the molten material can be prevented.
  • FIG. 9 schematically illustrates an arrangement example of the gas discharge structure A in the mold according to the present invention inside the mold.
  • the solid line arrow indicates the flow direction of the molten material
  • the broken line arrow indicates It represents the direction of gas flow.
  • FIG. (A) is an example in which a molten material is press-fitted from a left end gate which is a single gate.
  • the flow direction of the molten material is also a single simplest configuration example, and shows an example in which the gas discharge structure A is disposed on the end side in the flow direction of the molten material.
  • FIG. 6C is an example in which a large molded article is mainly molded by a multi-point (2) gate.
  • One gas discharge structure A is provided near the junction of molten materials flowing from the left and right gates 1 and 2. An example in which is provided is shown.
  • FIG. (D) shows an embodiment in which the molten material flow path is divided into two halves from the single gate to the branch path, and the cavity is filled from two directions.
  • two gas discharge structures A are disposed at the flow direction tip of the molten material at the bent portion of the molten material flow path.
  • the molten material flow path and the gas components inside the cavity are flowed and discharged until the tip of the molten material flow portion branched to the left and right reaches the gas discharge structure A.
  • the gas discharge structure A according to the present invention is arranged at the flow end by determining the flow direction from the gate into which the molten material is press-fitted, and preferably using flow analysis using a computer.
  • the gas discharge structure in the mold according to the above-described embodiment and other configuration examples is provided in the middle of the molten material flow path connected to the filling space formed by the fixed mold and the movable mold or the vicinity of the end.
  • the gas release structure in the mold according to the present invention forms a gap into which the molten material enters and an inclined surface that engages and seals the gap. Since it is a structure, when the front-end
  • the gas release structure in the mold according to the present invention is high as long as the opening process for both the sliding member and the sliding member receiver and the sliding part processing for smooth sliding are performed with initial accuracy. Gas is released by self-actuation with accuracy and no time delay.
  • the exact location in the mold can be set accurately by defining the cavity shape, size, number of gates, molten material used, etc., and using a computer-aided molten material flow analysis. It is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
PCT/JP2012/057370 2012-03-22 2012-03-22 金型内の気体放出構造及び当該構造を備えた金型 WO2013140580A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2013539832A JP5509477B2 (ja) 2012-03-22 2012-03-22 金型内の気体放出構造及び当該構造を備えた金型
KR1020127011170A KR20140138376A (ko) 2012-03-22 2012-03-22 금형 내의 기체방출구조 및 당해 구조를 구비한 금형
PCT/JP2012/057370 WO2013140580A1 (ja) 2012-03-22 2012-03-22 金型内の気体放出構造及び当該構造を備えた金型

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/057370 WO2013140580A1 (ja) 2012-03-22 2012-03-22 金型内の気体放出構造及び当該構造を備えた金型

Publications (1)

Publication Number Publication Date
WO2013140580A1 true WO2013140580A1 (ja) 2013-09-26

Family

ID=49222074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/057370 WO2013140580A1 (ja) 2012-03-22 2012-03-22 金型内の気体放出構造及び当該構造を備えた金型

Country Status (3)

Country Link
JP (1) JP5509477B2 (ko)
KR (1) KR20140138376A (ko)
WO (1) WO2013140580A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015145098A (ja) * 2014-02-03 2015-08-13 国立大学法人九州工業大学 金型内ガス排出方法及びその方法を適用した成形用金型
JP2015231737A (ja) * 2015-05-14 2015-12-24 ケンモールドサービス株式会社 金型内の気体放出構造及び当該構造を備えた金型

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230122440A (ko) * 2022-02-14 2023-08-22 효성중공업 주식회사 고속 금형장치
CN115091170B (zh) * 2022-06-23 2023-04-07 浙江万丰精密制造有限公司 一种复合式带导气的射销安装机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127112A (ja) * 1983-12-14 1985-07-06 Matsushita Electric Works Ltd 成形金型のエア抜き装置
JPS6390552U (ko) * 1986-12-04 1988-06-11
JPH03173621A (ja) * 1989-12-01 1991-07-26 Toyoda Gosei Co Ltd 射出成形用金型
JP2004299085A (ja) * 2003-03-28 2004-10-28 Mitsubishi Materials Corp 射出成形用金型およびその製造方法
WO2009096331A1 (ja) * 2008-01-28 2009-08-06 Kabushiki Kaisha Saito Kanagata Seisakusho 金型内の気体放出構造及び当該構造を備えた金型

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127112A (ja) * 1983-12-14 1985-07-06 Matsushita Electric Works Ltd 成形金型のエア抜き装置
JPS6390552U (ko) * 1986-12-04 1988-06-11
JPH03173621A (ja) * 1989-12-01 1991-07-26 Toyoda Gosei Co Ltd 射出成形用金型
JP2004299085A (ja) * 2003-03-28 2004-10-28 Mitsubishi Materials Corp 射出成形用金型およびその製造方法
WO2009096331A1 (ja) * 2008-01-28 2009-08-06 Kabushiki Kaisha Saito Kanagata Seisakusho 金型内の気体放出構造及び当該構造を備えた金型

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015145098A (ja) * 2014-02-03 2015-08-13 国立大学法人九州工業大学 金型内ガス排出方法及びその方法を適用した成形用金型
JP2015231737A (ja) * 2015-05-14 2015-12-24 ケンモールドサービス株式会社 金型内の気体放出構造及び当該構造を備えた金型

Also Published As

Publication number Publication date
JPWO2013140580A1 (ja) 2015-08-03
JP5509477B2 (ja) 2014-06-04
KR20140138376A (ko) 2014-12-04

Similar Documents

Publication Publication Date Title
JP4455676B2 (ja) 金型内の気体放出構造及び当該構造を備えた金型
CN101497117B (zh) 模具和制造铸造制品的方法
JP5509477B2 (ja) 金型内の気体放出構造及び当該構造を備えた金型
CN103313833A (zh) 注塑成型机用热流道阀门装置
CN102837401B (zh) 一种具有功能模块的塑胶成型模具
US8790102B2 (en) Injection molding apparatus
CN116748486B (zh) 一种铝合金结构件压铸模具
CN103042192A (zh) 可实时监测内部腔体内的真空压力的压铸模具
CN116352051B (zh) 一种压铸模具及压铸工艺
JP5808503B1 (ja) 金型内の気体放出構造
KR100940804B1 (ko) 스위치 레버 제조용 ２단 슬라이드 금형
JP6014949B2 (ja) 金型内の気体放出構造及び当該構造を備えた金型
JP2000225633A (ja) 中空成形用金型装置
CN212045772U (zh) 一种抗注塑熔体扰动的热流道阀针系统
JP2008279498A (ja) 成形金型及び射出成形方法
CN111086165A (zh) 一种抗注塑熔体扰动的热流道阀针系统
KR101691041B1 (ko) 중공을 갖는 플라스틱 볼트의 사출 금형장치
WO2017075754A1 (en) Mold, molding method and product produced through molding process
KR20230114344A (ko) 수지의 압력차이를 이용한 게이트 개폐형 핫런너 밸브장치
CN115742191A (zh) 基于汽车脚踏板生产可防止提前固化的成型模具
JPS6395924A (ja) 射出圧縮成形金型
JP2005271496A (ja) 金型
JP2012223987A (ja) 金型装置および成形方法
KR20150106600A (ko) 사출금형의 게이트장치

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 20127011170

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2013539832

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12871695

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12871695

Country of ref document: EP

Kind code of ref document: A1