WO2018096692A1 - Mécanisme en saillie pour matrice de moulage, et matrice de moulage pourvu dudit mécanisme en saillie - Google Patents

Mécanisme en saillie pour matrice de moulage, et matrice de moulage pourvu dudit mécanisme en saillie Download PDF

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Publication number
WO2018096692A1
WO2018096692A1 PCT/JP2016/085254 JP2016085254W WO2018096692A1 WO 2018096692 A1 WO2018096692 A1 WO 2018096692A1 JP 2016085254 W JP2016085254 W JP 2016085254W WO 2018096692 A1 WO2018096692 A1 WO 2018096692A1
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WIPO (PCT)
Prior art keywords
spring
holder
protruding
pin
molding die
Prior art date
Application number
PCT/JP2016/085254
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English (en)
Japanese (ja)
Inventor
正典 反本
Original Assignee
株式会社テクノクラーツ
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Application filed by 株式会社テクノクラーツ filed Critical 株式会社テクノクラーツ
Priority to JP2018552384A priority Critical patent/JP6796336B2/ja
Priority to PCT/JP2016/085254 priority patent/WO2018096692A1/fr
Publication of WO2018096692A1 publication Critical patent/WO2018096692A1/fr

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    • 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
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/50—Removing moulded articles
    • 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
    • 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles

Definitions

  • the present invention relates to a protruding mechanism of a molding die and a molding die including the protruding mechanism.
  • a molding die having a two-stage protruding mechanism that performs a protruding process in two stages As a molding die for a molded product having an undercut, a molding die having a two-stage protruding mechanism that performs a protruding process in two stages is known.
  • Various types and structures of the two-stage protruding mechanism have been developed.
  • a magnet-type two-stage protruding mechanism including an upper and lower two-stage ejector plate and a magnet attached thereto, one ejector plate and a spring
  • Patent Documents 1, 2, and 3 There are two-stage protruding mechanisms using the above (for example, see Patent Documents 1, 2, and 3).
  • a spring is mounted between an ejector plate and a mounting plate, a first ejector pin protrudes upward via the spring, and a second ejector The pin is projected by the ejector plate.
  • the ejector pin protruded by the spring rises together with the ejector plate until the predetermined position is reached, and protrudes the molded product. After reaching the predetermined position, only the ejector plate rises and projects the molded product.
  • the molding die of Patent Document 2 adopts the same configuration as the molding die described in Patent Document 1, and an ejector pin protruding by a spring is used as an undercut pin for molding an undercut portion.
  • the spring is disposed above the ejector plate.
  • JP 2002-172641 A Japanese Patent Laid-Open No. 5-200806 Japanese Utility Model Publication No. 2-9520
  • the spring has enough force to push it, but in the case of a protruding mechanism in which the spring is disposed between the ejector plate and the mounting plate, the spring is attached.
  • the force (spring reaction force) is the largest when the ejector plate is in the lowest position, and the spring is extended as the ejector plate moves upward, and the urging force is reduced, so it is not easy.
  • the initial protruding force is weak because the spring is extended when the ejector plate is at the lowest position.
  • An object of the present invention is to provide a molding die protruding mechanism that can be surely punched and reduced in size, a movable side mold and / or a fixed side mold including the protruding mechanism, and a molding die. It is.
  • the present invention relates to a projecting mechanism of a molding die having an ejector plate, which molds a molded product by a fixed side mold and a movable side die, and includes a projecting pin that uses a spring reaction force of a spring as a driving source, and the projecting A spring that protrudes from the pin, and a holder that is attached to an ejector plate member and receives the spring, the spring being mounted to protrude the protruding pin into the holder, and the holder receives It is an extension restricting means for restricting the extension amount of the spring to a predetermined range, and the ejector plate member is an ejector plate, a member attached to the ejector plate, or a member that moves in synchronization with the ejector plate. This is a protruding mechanism of a molding die.
  • the holder includes an outer holder attached to the ejector plate member, and an inner holder slidably engaged with the outer holder, and the ceiling of the outer holder
  • the surface is provided with an insertion hole through which the protruding pin is inserted, and the protruding pin has a flange that cannot pass through the insertion hole at the bottom or lower portion, and the flange is housed in the outer holder in the state where the flange is accommodated in the outer holder.
  • the spring is mounted in the inner holder so as to protrude freely through the insertion hole, and the holder regulates the sliding amount of the inner holder with respect to the outer holder, and accommodates it. The amount of extension of the spring is regulated within a predetermined range.
  • the inner holder is a stopper that prevents the projection pin from moving by bringing the top portion into contact with the flange and the bottom portion to the mold mounting plate in a clamped state. It is characterized by functioning.
  • the projecting mechanism of the molding die of the present invention further has a guide pin for guiding the spring under the collar of the projecting pin, and the spring is accommodated in the holder while being inserted through the guide pin. It is characterized by that.
  • the guide pin is a stopper that prevents the movement of the protruding pin by bringing the tip portion into contact with the bottom of the inner holder or the mounting plate of the mold in a clamped state. It functions as.
  • the outer holder and the inner holder have an opening through which the spring accommodated therein can be visually recognized.
  • the protruding mechanism of the molding die according to the present invention includes an upper insertion hole through which the protruding pin can be inserted into the ejector plate member and a ridge at a lower portion of the protruding pin cannot pass, instead of the outer holder, and the upper A lower insertion hole communicating with the insertion hole and slidably locking the inner holder is provided, and the lower insertion hole regulates the sliding amount of the inner holder that is slidably locked, and the extension of the spring to be accommodated The amount is limited to a predetermined range.
  • the molding die is a molding die having an undercut processing mechanism
  • the protruding pin is a protruding pin for extruding the undercut processing mechanism
  • the projecting mechanism of the molding die according to the present invention includes the projecting pin, the spring, and the holder as one set, or the projecting pin, the spring, the holder, and the guide pin as one set. It is characterized by being installed in plural.
  • the present invention is a fixed side mold and / or a movable side mold provided with the protruding mechanism of the molding die.
  • the present invention is a molding die comprising the fixed side mold and / or the movable side mold.
  • the present invention is a molded product molded with the fixed mold and / or the movable mold, or the molding mold.
  • the protruding mechanism of the molding die of the present invention includes a protruding pin that can move independently of the ejector plate using a spring as a driving source, it protrudes in two steps with the ejector pin fixed to the ejector plate, and further protrudes with the spring.
  • a protruding pin that can move independently of the ejector plate using a spring as a driving source, it protrudes in two steps with the ejector pin fixed to the ejector plate, and further protrudes with the spring.
  • the holder for housing the spring for projecting the projecting pin regulates the extension amount of the spring to a predetermined range, the biasing force of the spring during the projecting operation is maintained high in the projecting mechanism of the molding die of the present invention. It can be surely cut out.
  • the protruding mechanism of the molding die of the present invention can be configured by a protruding pin, a spring, and a holder, a complicated structure part is not required. Further, since the urging force of the spring is maintained at a high level using the holder, it is not necessary to use a large spring. For this reason, it is possible to reduce the size of the molding die protruding mechanism, the fixed side die and / or the movable side die, and further the molding die.
  • the spring is attached to the fixed side mold or the movable side mold while being accommodated in the holder. It is easy to incorporate the protruding mechanism. Further, even in a molding die that opens in the horizontal direction, the spring can be prevented from falling or tilting, so that the die can be removed with certainty.
  • the inner holder for accommodating the spring and / or the guide pin attached to the bottom of the protruding pin functions as a stopper for preventing the protruding pin from moving. Even if a large resin load is applied to the protruding pin during injection molding, the protruding pin does not move, and molding defects can be reliably prevented.
  • FIG. 5 is an enlarged view around the holder 55 of the injection mold 1 of FIG. 1. It is principal part sectional drawing which shows the state at the time of mold opening of the injection mold 1 of FIG. It is principal part sectional drawing which shows the state at the time of the molded article protrusion of the injection mold 1 of FIG. It is principal part sectional drawing which shows the state at the time of the molded article protrusion of the injection mold 1 of FIG. It is principal part sectional drawing which shows the state at the time of the molded article protrusion of the injection mold 1 of FIG. It is principal part sectional drawing which shows the state at the time of the molded article protrusion of the injection mold 1 of FIG.
  • FIG. 1 is a cross-sectional view of an essential part of an injection mold 1 according to the first embodiment of the present invention
  • FIG. 2 is an enlarged view around a holder 55 of the injection mold 1 of FIG.
  • FIG. 3 is a cross-sectional view of the main part showing the state of the injection mold 1 when the mold is opened
  • FIGS. 4 to 6 are cross-sectional views of the main part showing the state of the injection mold 1 when the molded product is protruding.
  • FIG. 7 is a view for explaining the spring reaction force of the spring 51 used in the second protruding mechanism 41 of the injection mold 1 of FIG.
  • the upward and upward directions refer to the upward and upward directions in the drawing.
  • the direction of the fixed mold 12 is the upward and upward direction.
  • the injection mold 1 is a mold that includes two protruding mechanisms and performs the protruding of the molded product 10 having an undercut portion in two stages, and opens the mold in the vertical direction.
  • the injection mold 1 includes a fixed mold 12 having a cavity 14 serving as a molding surface and a movable mold 21 including a core 31 serving as a molding surface.
  • the movable side mold 21 includes a movable side receiving plate 32 on which a core 31 is formed, and a movable side mounting plate 33 for mounting the movable side mold 21 on a die clamping mechanism side die plate (not shown) of an injection molding machine.
  • the spacer block 34 is disposed between the movable side receiving plate 32 and the movable side mounting plate 33 and secures a movable range of the protruding mechanism.
  • the movable mold 21 further has an undercut processing mechanism 35.
  • the undercut is the inner undercut.
  • the undercut processing mechanism 35 includes a forming piece 36 for forming an undercut, an inclined pin 37, an undercut forming unit 38 that projects the forming piece 36 in a direction perpendicular to the protruding direction, and an undercut forming unit 38 on the movable side.
  • a fixing plate 39 that is fixed to the plate 32 is provided.
  • the molding piece 36 is pushed up by a second protruding mechanism 41 described later.
  • the movable mold 21 further includes a first protruding mechanism 70 for protruding the molded product 10.
  • the first protruding mechanism 70 includes an ejector plate 72 and an ejector pin 71 that is fixed to the ejector plate 72 and protrudes the molded product 10.
  • the ejector plate 72 is provided with a protruding device (not shown) of an injection molding machine.
  • the ejector rod 85 that transmits the protruding power applied to the ejector plate 72 is bolted.
  • a return pin 87 through which a compression coil spring 86 is inserted is fixed to the ejector plate 72 so as to project the ejector plate 72 and return it to the previous position.
  • the ejector plate 72 includes an upper ejector plate 72b and a lower ejector plate 72a, and is bolted to form one ejector plate.
  • the ejector plate 72 has a counterbore type plate structure, and sandwiches and fixes the ejector pins 71 protruding from the molded article 10 and the bottoms of the return pins 87.
  • the second protruding mechanism 41 is a protruding mechanism that protrudes (pushes up) the molding piece 36 of the undercut processing mechanism 35, and includes a protruding pin 43 that pushes up the forming piece 36, a spring 51 that biases the protruding pin 43 in the protruding direction, A holder 55 for accommodating the spring 51 and a guide pin 52 for guiding the spring 55 are provided.
  • the protruding pin 43 is a stepped pin provided with an enlarged portion 47 from the center to the lower portion, and has a disk-shaped ridge 50 larger than the enlarged portion 47 of the pin main body 46 at the bottom.
  • the flange 50 functions as a stopper for the ejector plate 72 of the protruding pin 43.
  • the enlarged portion 47 is a movement amount regulating means for regulating the movement amount of the protruding pin 43.
  • the position of the upper end 48 of the enlarged portion 47 is such that the movement amount (stroke amount) of the protruding pin 43 causes the molding piece 36 to move under.
  • the height L1 is set so as to be necessary for removing the cut.
  • ⁇ 50 may be fixed to the pin body 46 with a bolt or the like, or may be formed integrally with the pin body 46.
  • the enlarged portion 47 may also be formed integrally with the pin body 46, or may be formed by inserting into the pin body 46 with a sleeve structure.
  • the spring 51 is formed of a compression coil spring, is inserted into a guide pin 52 attached to the bottom of the protruding pin 43 so as to be extendable and retracted, is accommodated in the holder 55 in a state of being inserted through the guide pin 52, and the flange 50 of the protruding pin 43 is Push up.
  • the strength (spring reaction force), action, and biasing force of the spring 51 will be described in the operation of the injection mold 1 to be described later when the molded product protrudes and the action of the protrusion mechanism.
  • the guide pin 52 is a member that guides the spring 51, is made of a round bar, and protrudes toward the movable side mounting plate 33 and is fixed to the bottom of the pin 43.
  • the guide pin 52 functions as a guide that protrudes the spring 51 and holds it on the central axis of the pin 43.
  • the outer diameter of the guide pin 52 is preferably slightly smaller than the inner diameter of the spring 51 so that the spring 51 can be inserted and does not wobble. As a result, even in a mold that opens in the horizontal direction, the spring 51 can be protruded and held on the central axis of the pin 43.
  • the length of the guide pin 52 is preferably longer due to the function of the guide pin 52.
  • the guide pin 52 since the guide pin 52 is located in the inner holder 65, it needs to have a length accommodated in the inner holder 65 in the mold clamping state. In the injection mold 1, a resin pressure is applied so as to press down the molding core 36 at the time of injection. Therefore, if the length of the tip 54 of the guide pin 52 is in contact with the bottom 68 of the inner holder 65 in the mold clamping state, the guide pin 52 also functions as a stopper that prevents the pin 43 from being pushed down.
  • the holder 55 is a mounting tool for receiving the spring 51 and mounting the spring 51 so that the protruding pin 43 protrudes.
  • the holder 55 is also a spring extension regulating means that regulates the extension amount of the spring 51 within a predetermined range so that the spring reaction force of the spring 51 falls within a predetermined range.
  • the holder 55 includes an outer holder 56 that is attached to the ejector plate 72, and an inner holder 65 that is located in the outer holder 56 and that is slidably locked to the outer holder 56.
  • the holder 55 is attached to the ejector plate 72 such that the central axis protrudes and coincides with the central axis of the pin 43.
  • the outer holder 56 is a cylindrical member and has a fixing collar 58 on the outer wall surface.
  • the ejector plate 72 is provided with a through hole 75 into which the outer holder 56 is fitted.
  • the outer holder 56 is fitted into the through hole 75, and the flange 58 is sandwiched and fixed between the lower ejector plate 72a and the upper ejector plate 72b. Yes.
  • the outer holder 56 When the outer holder 56 is fixed to the ejector plate 72, the upper surface 57 is flush with the upper surface 74 of the ejector plate 72, and the bottom (lower end) 59 abuts against the movable side mounting plate 33 in the mold clamping state.
  • the outer holder 56 is provided with an opening (not shown), such as a slit, through which the spring 51 accommodated in the inner holder 65 can be seen.
  • the size, shape, and number of the openings are not particularly limited as long as the strength required for the outer holder 56 is ensured.
  • the inner diameter of the outer holder 56 differs in the height direction.
  • the upper part of the outer holder 56 is a hole 60a through which the enlarged portion 47 of the protruding pin 43 slides freely. For this reason, the flange 50 of the protruding pin 43 cannot pass through this portion.
  • a lower portion of the outer holder 56 is a hole 60c through which the inner holder 65 slides. The flange 50 of the protruding pin 43 cannot pass through the hole 60c.
  • the center portion of the outer holder 56 is a hole 60b that is slightly larger than the flange 50 of the protruding pin 43 and communicates with the upper hole 60a and the lower hole 60c. Therefore, the boundary between the upper hole 60a and the central hole 60b is a stepped portion 62, and the boundary between the lower hole 60c and the central hole 60b is a stepped portion 63.
  • the height of the central hole 60 b is determined from the amount of movement of the inner holder 65.
  • the inner holder 65 is a cylindrical member with a bottom and an open top, and has a flange 67 on the outer wall surface of the ceiling.
  • the diameter of the flange 67 is substantially the same as the flange 50 of the protruding pin 43. For this reason, the flange 67 can pass through the hole 60 b in the center of the outer holder 62, but cannot pass through the hole 60 a in the upper part and the hole 60 c in the lower part of the outer holder 56.
  • the inner holder 65 is also provided with an opening (not shown), for example, a slit, through which the spring 51 accommodated in the inner holder 65 can be seen.
  • the size, shape, and number of the openings are not particularly limited as long as the strength required for the inner holder 65 is ensured. As described above, by providing the outer holder 56 and the inner holder 65 with the opening portion through which the spring 51 can be visually recognized, even when the spring 51 is broken, this can be easily found.
  • the inner diameter of the inner holder 65 is substantially the same as the outer diameter of the spring 51, and the spring 51 can be expanded and contracted within the inner holder 65.
  • the length of the inner holder 65 is set so that the bottom (lower end) 68 abuts on the movable side mounting plate 33 in the mold clamping state, and the inner holder 65 protrudes in the mold clamping state and the pin 43 is pushed down. It also functions as a stopper to prevent this. If the inner diameter of the inner holder 65 is substantially the same as the outer diameter of the spring 51 as in this embodiment, the inner holder 65 also functions as a guide for the spring 51. In such a case, the guide pin 52 may be omitted.
  • a flange 67 is slidably fitted into a hole 60b in the center of the outer holder 56.
  • the maximum movable amount A of the inner holder 65 is obtained by subtracting the thicknesses of the flanges 50 and 67 from the height of the central hole 60b, and the maximum extension amount of the spring 51 is also the maximum movement amount A. .
  • the maximum movement amount A is L1> A when the maximum protrusion height of the protruding pin 43 is L1 (see FIG. 7).
  • the protruding pin 43 is inserted so that the flange 50 passes through the hole 60 b in the center portion of the outer holder 56 and the enlarged portion 47 of the protruding pin 43 passes through the hole 60 a in the upper portion of the outer holder 56.
  • the inner holder 65 is located below the flange 50 of the protruding pin 43 and accommodates the spring 51 inserted through the guide pin 52.
  • the injection mold 1 is subjected to an injection process and a cooling process, and then the mold is opened and the molded product 10 is projected.
  • the injection mold 1 is in the state shown in FIG. 1.
  • the tip of the protruding pin 43 contacts the undercut molding unit 38
  • the flange 50 contacts the upper step 62 of the outer holder
  • the ceiling 66 of the inner holder is in contact with the flange 50
  • the bottom (lower end) 68 of the inner holder is in contact with the movable side mounting plate 33. Therefore, the positions of the molding piece 36 and the protruding pin 43 and the like do not drop even when the resin pressure is applied to the molding piece 36 and the protruding pin 43 and the like as it is pushed down.
  • the movable side mold 21 is retracted through a mold clamping device (not shown) to open the mold, and the molded product 10 is taken out between the fixed side mold 12 and the movable side mold 21. The space for this is secured (see FIG. 3).
  • the spring 51 is in a compressed state, and the spring reaction force at this time is F 0 (see FIG. 7).
  • the ejector pin 43 acts a spring reaction force F 0 of the spring 51, ejector pin 43 can not rise because the flange 50 is caught on the step portion 62 of the outer holder.
  • the ejector rod 85 moves forward with the power of the projecting device (not shown) of the injection molding machine, and the ejector plate 72 connected to the ejector rod 85 rises.
  • the fixed ejector pin 71 also moves in the protruding direction and pushes up the molded product 10.
  • the outer holder 56 is fixed to the ejector plate 72.
  • the spring 51 in the inner holder 65 also extends. Until the ejector plate 72 reaches point A, the spring 51 continues to extend.
  • FIG. 4 shows a state where the ejector plate 72 has moved to the point A , and shows the spring reaction force FA of the spring 51 acting on the protruding pin 43 (see FIG. 7).
  • the protruding pin 43 is in a state in which the flange 50 is hooked on the upper step portion 62 of the outer holder, so that it cannot be raised further even if it is biased to protrude by the spring 51.
  • the projecting pin 43 rise together.
  • the ejector plate 72 continues to rise.
  • the hook 50 is in a state of being caught by the upper step portion 62 of the outer holder, so that the ejector plate 72 and the projecting pin 43 rise together.
  • the spring 51 cannot extend because the flange 67 of the inner holder 65 is in contact with the lower step portion 63 of the outer holder. Therefore, the spring reaction force of the spring 51 during this period is constant at F A (see FIG. 7).
  • the inner holder 65 also rises together while being caught by the outer holder 56.
  • FIG. 5 shows a state in which the upper end 48 of the enlarged portion of the protruding pin 43 has abutted against the fixed plate 39.
  • the molding piece 36 moves to the left and the undercut is removed.
  • the protruding pin 43 is protruded by the spring reaction force F A of the spring 51 until the L 1 point is reached after the ejector plate 72 reaches the A point.
  • the spring 51 continues to extend after reaching the point A, and when the ejector plate 72 reaches the point L1, the spring reaction force of the spring 51 is F 1 '. (See FIG. 7).
  • the protruding force of the protruding pin 43 can be increased by a maximum ⁇ F.
  • the urging force (spring reaction force) of the spring decreases as the ejector plate moves upward. It has been a problem that this cannot be canceled when it is caught on the member.
  • the holder 55 is provided and the spring reaction force of the spring 51 is kept high, so that the conventional problem can be solved.
  • the maximum push-up height of the ejector plate 72 is the height of L1 + L2 from the initial position, and the ejector pin 71 fixed to the ejector plate 72 also moves to the height of L1 + L2 from the initial position, thereby protruding the molded product 10 ( (See FIG. 6).
  • the process proceeds to the mold clamping process.
  • the protruding device (not shown) of the injection molding machine moves backward from the movable side receiving plate 32 side to the movable side mounting plate 33 side.
  • the ejector plate 72 that has lost the projecting power of the projecting device of the injection molding machine is retracted from the movable side receiving plate 32 side to the movable side mounting plate 33 side by the spring reaction force of the compression coil spring 86 and the spring 51.
  • the ejector plate 72 is retracted from the maximum projecting position by the height L2, the upper step portion 62 of the outer holder projects and hits the flange 50 of the pin 43.
  • the protruding pin 43 is lowered integrally with the ejector plate 72, and when it is lowered to the point A, the bottom (lower end) 68 of the inner holder contacts the movable side mounting plate 33 (see FIG. 4).
  • the bottom 68 of the inner holder is pushed by the movable side mounting plate 33, and the spring 51 is also compressed.
  • the tip of the return pin 87 comes into contact with the solid-side mold 12, and the ejector plate 72 is pushed back to the position before the original protrusion. Thereby the spring 51 is compressed to a state of the spring reaction force F 0.
  • the second protruding mechanism 41 which basically includes the protruding pin 43, the spring 51, and the holder 55, moves independently of the ejector plate 72 using the spring reaction force of the spring as a driving source. Therefore, a plurality of second protruding mechanisms 41 can be provided for one ejector plate 72, and multistage protrusion can be easily performed by varying the stroke amount of the protruding pin 43. Even with such an injection mold that performs multi-stage extrusion, only one ejector plate 72 is required, so that the mold can be made compact.
  • FIG. 8 is a modification of the protruding pin 43 of the injection mold 1 according to the first embodiment of the present invention.
  • the same components as those of the injection mold 1 of the first embodiment shown in FIGS. 1 to 7 are denoted by the same reference numerals, and description thereof is omitted.
  • the enlarged portion 47 is used as the movement amount regulating means for regulating the movement amount of the protruding pin 43.
  • a flange 49 is provided as shown in FIG. May be.
  • the shape of the flange 49 is not particularly limited, and the flange 49 may be fixed to the pin body 46 with a bolt or the like, or may be formed integrally with the pin body 46.
  • FIGS. 9 and 10 are modifications of the holder 55 of the injection mold 1 according to the first embodiment of the present invention, both of which are in a clamped state.
  • the inner holder 65 is used as a stopper for preventing the movement of the protruding pin 43 in the clamped state, but the guide pin 52 may be used as a stopper together with the inner holder 65.
  • An example in which the inner holder 65 and the guide pin 52 are used as stoppers is shown in FIG.
  • a through hole 69 through which the guide pin 52 can be inserted is formed in the bottom 68 of the inner holder.
  • the guide pin 52 used here is longer in length than the guide pin 52 of the first embodiment, and the distal end portion 54 enters the through hole 69.
  • the distal end portion 54 of the guide pin 52 is in the mold clamping state. It contacts the movable side mounting plate 33. Thereby, the inner holder 65 and the guide pin 52 can be used as a stopper for preventing the movement of the protruding pin 43 in the clamped state.
  • the through hole 76 into which the inner holder 65 is slidably fitted is provided in the same manner as the outer holder 56.
  • the upper part of the through hole 76 is a hole 76a in which the enlarged portion 47 of the protruding pin 43 slides freely. For this reason, the flange 50 of the protruding pin 43 cannot pass through this portion.
  • a lower portion of the through hole 76 is a hole 76c through which the inner holder 65 slides. The flange 50 of the protruding pin 43 cannot pass through the hole 76c.
  • the central portion of the through hole 76 is a hole 76b having a diameter slightly larger than the flange 50 of the protruding pin 43, which communicates with the upper hole 76a and the lower hole 76c. Therefore, the boundary between the upper hole 76a and the central hole 76b is a stepped portion 62, and the boundary between the lower hole 76c and the central hole 76b is a stepped portion 63.
  • the height of the central hole 76b is determined by the amount of movement of the inner holder 65.
  • the holder shown in FIG. 10 does not have a portion corresponding to the outer holder 56 protruding from the ejector plate 72 of the first embodiment.
  • the holder 55 of the first embodiment is formed so that the bottom portion 59 of the outer holder 56 also contacts the movable side mounting plate 33 when the mold is clamped, but this is not an essential requirement.
  • the holder 55 can be formed by the through hole 76 provided in the ejector plate 72 and the inner holder 65.
  • the protruding mechanism of the molding die according to the present invention has the first protruding mechanism using the ejector plate as a driving source and the second protruding mechanism using the spring as the driving source, and the protruding mechanism. Can be moved independently of each other, so that even a molded product having a complicated undercut portion can be reliably punched.
  • both the first protruding mechanism and the second protruding mechanism do not require complicated parts, the number of parts is small, the structure is simple and the assembly is easy, the molding mold protruding mechanism, the fixed side mold and / or the movable side mold, Furthermore, the mold can be made compact and inexpensive.
  • the holder for accommodating the spring that protrudes the protruding pin restricts the extension amount of the spring to a predetermined range, so that the urging force of the spring is maintained at a high state during the protruding operation, and the die is reliably removed. be able to.
  • the holder it is not necessary to use a large spring, and the protruding mechanism of the molding die, the fixed side die and / or the movable side die, and further the molding die can be miniaturized.
  • the protruding mechanism of the molding die according to the present invention is attached to the fixed side mold or the movable side mold while the spring is accommodated in the holder, the main protrusion to the fixed side mold or the movable side mold is performed. It becomes easy to incorporate the mechanism. Further, even in a molding die that opens in the horizontal direction, the spring can be prevented from falling or tilting, so that the die can be removed with certainty.
  • the inner holder for accommodating the spring and / or the guide pin attached to the bottom of the protruding pin functions as a stopper for preventing the protruding pin from moving. Even when a large resin load is applied to the protruding pin during injection molding, the protruding pin does not move, and molding defects can be reliably prevented.
  • the projecting mechanism of the molding die of the present invention, the fixed side mold and / or the movable side mold and the molding die provided with the projecting mechanism are not limited to the above-described embodiments, and may be appropriately selected within the scope not changing the gist. Can be changed and used.
  • the holder 55 that accommodates the spring 51 is attached to the ejector plate 72, but the holder 55 is attached to the ejector plate 72 and moves integrally with the ejector plate 72, or the ejector plate 72. You may attach to the member which moves synchronously.
  • the flange 50 is provided at the bottom of the protruding pin 43, but the flange 50 may be a lower portion of the protruding pin 43.
  • the core 31 is directly formed on the movable side receiving plate 32.
  • a core may be formed there by providing a movable side mold plate, and the core may be nested.
  • the undercut is an inner undercut.
  • the undercut may be an outer undercut, and the undercut processing mechanism is not limited to this configuration.
  • the number of ejector pins 71 that are fixed to and protrude from the ejector plate 72 is not particularly limited.
  • the second protruding mechanism 41 including the protruding pin 43, the spring 51, and the holder 55 moves independently of the ejector plate 72 using the spring reaction force of the spring as a driving source. Therefore, a plurality of second protruding mechanisms 41 can be provided for one ejector plate 72, and multistage protrusion can be easily performed by varying the stroke amount of the protruding pin 43. Even with such an injection mold that performs multi-stage extrusion, only one ejector plate 72 is required, so that the mold can be made compact. The same applies to the second protruding mechanism 41 including the protruding pin 43, the spring 51, the holder 55, and the guide pin 52.
  • the material of each component used for the projection mechanism of the molding die of the present invention, the fixed side die having the projection mechanism, the movable side die, and the molding die is not limited to a specific material. What is necessary is just to use suitably the same thing as the material of the member used for a well-known molding die. However, it is preferable to use a material having a good slidability or a material subjected to a surface treatment having a good slidability for the sliding surface of each constituent member. Each sliding surface is not limited to surface contact, and may be line contact or point contact.
  • corners and side ridges of each component member may be subjected to R chamfering or C chamfering.
  • the molding die of the present invention is not limited to a molding die that opens and closes up and down, and may be a molding die that opens and closes in the left and right or another direction.
  • the molding mechanism of the molding die of the present invention a fixed side mold, a movable side mold, and a molding die provided with the projection mechanism are mold molds such as die casting molds, mold press molding in addition to injection molds. It can be suitably used for a mold or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne : un mécanisme en saillie pour une matrice de moulage, qui permet un retrait de matrice fiable et qui est compact ; une matrice mobile et/ou une matrice fixe qui sont pourvue du mécanisme en saillie ; et une matrice de moulage. L'invention concerne un mécanisme en saillie pour une matrice de moulage destinée à mouler un produit moulé 10 à l'aide d'une matrice fixe 12 et d'une matrice mobile 21. Le mécanisme en saillie est pourvu : d'une broche en saillie 43 utilisant la force de réaction de ressort d'un ressort 51 comme source d'entraînement ; du ressort 51, qui amène la broche en saillie 43 à faire saillie ; et d'un support 55 monté sur une plaque d'éjecteur 72 et recevant le ressort 43. Le ressort 51 est monté dans le support 55 de façon à amener la broche en saillie 43 à faire saillie, et le support 55 limite la quantité d'extension du ressort reçu 43 dans une plage prédéfinie.
PCT/JP2016/085254 2016-11-28 2016-11-28 Mécanisme en saillie pour matrice de moulage, et matrice de moulage pourvu dudit mécanisme en saillie WO2018096692A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018552384A JP6796336B2 (ja) 2016-11-28 2016-11-28 成形金型の突出し機構、該突出し機構を備える成形金型
PCT/JP2016/085254 WO2018096692A1 (fr) 2016-11-28 2016-11-28 Mécanisme en saillie pour matrice de moulage, et matrice de moulage pourvu dudit mécanisme en saillie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/085254 WO2018096692A1 (fr) 2016-11-28 2016-11-28 Mécanisme en saillie pour matrice de moulage, et matrice de moulage pourvu dudit mécanisme en saillie

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WO2018096692A1 true WO2018096692A1 (fr) 2018-05-31

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109130021A (zh) * 2018-11-22 2019-01-04 常州大学 定模脱模机构
CN111571943A (zh) * 2020-05-19 2020-08-25 中山市利群精密实业有限公司 一种具有司筒顶出结构的模具
CN112542393A (zh) * 2020-12-10 2021-03-23 温州大学 一种用于集成电路封装模具的排出装置
CN115157542A (zh) * 2022-09-02 2022-10-11 广东美特家家居用品有限公司 可消除注塑件银纹缺陷日用塑料制品注塑成型装置及工艺

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JP2002172641A (ja) * 2000-12-04 2002-06-18 Kasai Kogyo Co Ltd 樹脂成形体の成形用金型
JP2014097628A (ja) * 2012-11-15 2014-05-29 Technocrats Corp 成形金型の突出し機構、該突出し機構を備える可動側金型及び成形金型

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JP2006027229A (ja) * 2004-07-21 2006-02-02 Techno Hama Kk 成形装置

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2002172641A (ja) * 2000-12-04 2002-06-18 Kasai Kogyo Co Ltd 樹脂成形体の成形用金型
JP2014097628A (ja) * 2012-11-15 2014-05-29 Technocrats Corp 成形金型の突出し機構、該突出し機構を備える可動側金型及び成形金型

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109130021A (zh) * 2018-11-22 2019-01-04 常州大学 定模脱模机构
CN109130021B (zh) * 2018-11-22 2021-10-08 常州大学 定模脱模机构
CN111571943A (zh) * 2020-05-19 2020-08-25 中山市利群精密实业有限公司 一种具有司筒顶出结构的模具
CN112542393A (zh) * 2020-12-10 2021-03-23 温州大学 一种用于集成电路封装模具的排出装置
CN112542393B (zh) * 2020-12-10 2023-06-02 温州大学 一种用于集成电路封装模具的排出装置
CN115157542A (zh) * 2022-09-02 2022-10-11 广东美特家家居用品有限公司 可消除注塑件银纹缺陷日用塑料制品注塑成型装置及工艺
CN115157542B (zh) * 2022-09-02 2022-12-13 广东美特家家居用品有限公司 可消除注塑件银纹缺陷日用塑料制品注塑成型装置及工艺

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JP6796336B2 (ja) 2020-12-09

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