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WO2004110723A1 - Moule metallique de moulage d'une douille faite d'une structure a double couche - Google Patents

Moule metallique de moulage d'une douille faite d'une structure a double couche Download PDF

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Publication number
WO2004110723A1
WO2004110723A1 PCT/JP2003/007518 JP0307518W WO2004110723A1 WO 2004110723 A1 WO2004110723 A1 WO 2004110723A1 JP 0307518 W JP0307518 W JP 0307518W WO 2004110723 A1 WO2004110723 A1 WO 2004110723A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
rubber
molding
die
stage
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2003/007518
Other languages
English (en)
Japanese (ja)
Inventor
Yoshikazu Tsujimoto
Yoshiharu Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
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 Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to PCT/JP2003/007518 priority Critical patent/WO2004110723A1/fr
Priority to AU2003242359A priority patent/AU2003242359A1/en
Priority to JP2004564065A priority patent/JP4187168B2/ja
Publication of WO2004110723A1 publication Critical patent/WO2004110723A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0408—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement
    • B29C45/0416—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement co-operating with fixed mould halves
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
    • 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
    • B29C45/261—Moulds having tubular mould cavities

Definitions

  • the present invention relates to a molding die for manufacturing a two-layer bush used for a stabilizer bush or the like of a vehicle.
  • a stabilizer bush of a vehicle is generally made of a rubber elastic body having a thick cylindrical shape, and a through hole of the stabilizer bar of the vehicle is held in its inner hole.
  • the bush A has an inner hole a 1 through which the stabilizer bar Sb penetrates, and a flat outer surface a 2 having a body outer surface serving as an abutting surface with respect to the vehicle body mounting surface.
  • a substantially U-shaped peripheral surface a3 that is continuous with the flat surface a2, and the flat surface a is brought into contact with a mounting surface of the vehicle body with the flat surface a as a top, and the portion of the substantially U-shaped peripheral surface a3 is substantially U-shaped. Hold with bracket B in the shape of a letter.
  • the bracket B is fixed to the mounting surface of the vehicle body by fixing bolts (not shown) passing through the mounting holes b 1, b 1 at both ends.
  • Flanges a4, a4 are provided at both ends of the bush A, and the bracket B holds the bush A between the flanges a4, a4.
  • the inner rubber A2 and the outer rubber A1 are different rubbers
  • an outer rubber material is injected into a mold hole of a molding die by an injection machine. Vulcanized or semi-vulcanized and then the core (core) is changed, and the inner rubber material is injected into the mold hole by another injection machine, vulcanized and the inner and outer rubber is vulcanized and bonded. I do.
  • the exchange of the core for the outer layer forming and the inner layer for the inner layer forming is performed by using the mold closing of the both upper dies.
  • the double-layered bushing can be manufactured efficiently.
  • the present invention provides a structure for increasing the adhesive strength between the outer layer rubber and the inner layer rubber of different types of rubber.
  • the present invention relates to a mold for forming a two-layer bush in which different types of inner and outer rubber layers are laminated, and is used for forming an outer layer to which a nozzle of an injection machine for an outer rubber material is connected.
  • a first upper mold, a second upper mold for inner layer molding to which the nozzle of the inner rubber material injection machine is connected, and a plurality of mold holes corresponding to the outer peripheral shape of the bush to be molded are provided on the upper surface side.
  • a first core pin which is inserted into the mold hole at the time of mold closing and joining to the lower mold to form a cavity for the outer layer rubber between the inner surface of the mold hole and the first core pin
  • the lower surface of the second upper mold has a diameter smaller than that of the first core pin, and is inserted into the mold hole when the mold is closed and joined to the lower mold, so that the outer layer rubber in the mold hole is formed.
  • a second core pin which forms a cavity for the inner layer rubber is provided so as to protrude there between.
  • the first core pin provided on the lower surface of the first upper die is formed by joining the first upper die to the upper surface of the lower die.
  • the cavity for the outer layer rubber can be formed in the mold cavity by being inserted into the mold cavity. Further, by closing and joining the second upper die to the upper surface of the lower die, the second core pin provided on the lower surface of the second upper die can be inserted into the die hole, A cavity for the inner rubber can be formed inside the outer rubber in the mold cavity.
  • the first upper mold is closed and joined to the lower mold having a mold hole to vulcanize or semi-vulcanize the outer layer rubber, and then the first upper mold is replaced with the first upper mold.
  • the upper mold is closed to the lower mold and joined, and the inner rubber can be vulcanized and molded so as to be laminated inside the outer rubber, and a two-layer structure formed by laminating different kinds of inner and outer rubbers
  • the push can be easily manufactured.
  • by using two upper dies for the outer layer molding and the inner layer molding it becomes easier to set the injection machine, sprue runner and injection gate which need to be separately provided for the outer layer rubber and the inner layer rubber, respectively.
  • the mold structure can be simplified.
  • an outer peripheral surface of the first core bin is roughened on a lower surface of the first upper die.
  • the inner peripheral surface of the outer rubber layer formed first becomes a rough surface having many minute irregularities corresponding to the outer peripheral surface of the core pin. For this reason, the adhesive strength with the inner rubber layer which is vulcanized and laminated on the inner side of the outer rubber layer is increased, and a two-layer structure bush having excellent integration of the inner and outer rubber layers can be obtained.
  • the present invention also provides the molding die, wherein the first upper mold is vertically movably supported in a first molding stage for molding the outer layer rubber, and the second upper mold molds the inner layer rubber.
  • the lower mold is supported in a second molding stage so as to be vertically movable, and the lower mold is movable from a lower corresponding position of the first upper mold to a lower corresponding position of the second upper mold, and at each position.
  • the first and second upper dies can be provided so that they can be closed and joined to the upper dies by descending.
  • the lower mold in which the mold holes are formed is transferred to the first molding stage for molding the outer rubber and the second molding stage for molding the inner rubber, and the outer rubber and the inner layer are molded.
  • Each of the rubbers can be molded.
  • the transfer structure can be simplified, and can be moved accurately and quickly using, for example, a cylinder device. Further, it is not necessary to take out the outer layer rubber previously vulcanized or semi-vulcanized at the first molding stage from the mold hole. Therefore, the two-layer bush is easily and efficiently manufactured. Can be built.
  • the present invention also provides the molding die, wherein the upper surface of the lower die is continuous with a sprue that vertically penetrates the upper die at the time of joining the first upper die.
  • Grooves for runners are formed to communicate with the injection gate from the side of the cavity for the outer rubber in the hole, and the second upper die is composed of two upper and lower plates that can be separated from each other. Between the upper plate and the upper plate, there is formed a runner groove continuous with the sprue penetrating the upper plate and the lower plate.
  • a second spool is provided which leads to the injection gate from above the cavity for the inner rubber.
  • the outer rubber material and the inner rubber material can be injected into each cavity through separate sprues, runners, and injection gates, and the sprue part and the runner part of the previously formed outer rubber remain on the upper surface of the lower mold. Even if it does, the inner layer rubber material can be injected.
  • the sprue portion and the runner portion of the outer rubber are formed between the lower mold and the first upper mold, and the sprue portion and the runner portion of the inner rubber are formed by the upper and lower presses of the second upper mold. —Because it occurs between the gates, these removal and removal operations can be performed individually.
  • FIG. 1 is a schematic front view showing an outline of an apparatus for manufacturing a two-layer structure bush provided with a molding die of the present invention.
  • FIG. 2 is a schematic plan view showing an arrangement state of each stage in the above apparatus.
  • FIG. 3 is a schematic explanatory view of the steps in the case where the manufacturing method of the present invention is carried out using the above apparatus.
  • FIG. 4 is a schematic front view of a first upper mold and a lower mold separated in a first molding stage for molding the outer layer rubber.
  • FIG. 5 is a schematic front view of the second upper mold and the lower mold separated in a second molding stage for molding the inner layer rubber.
  • FIG. 6 is a plan view of the lower die.
  • FIG. 7 is a sectional view taken along line VII-VII of FIG.
  • FIG. 8 is a cross-sectional view of the first upper mold and the lower mold in VIII-VIII of FIG. 6 before the mold is closed.
  • FIG. 9A is a cross-sectional view of the first upper mold and the lower mold in a closed state along the same line.
  • FIG. 9B is an enlarged cross-sectional view of the same mold hole portion.
  • 'FIG. 10 is a cross-sectional view of the outer layer formed by X-X line in FIG.
  • FIG. 11 is a cross-sectional view of the second upper mold and the lower mold before closing the mold along the same cross-sectional line as FIG.
  • FIG. 12A is a cross-sectional view of the second upper mold and the lower mold in a closed state along the same line.
  • FIG. 12B is an enlarged cross-sectional view of the same mold hole portion.
  • FIG. 13 is a cross-sectional view of the inner layer forming state along the same cross-sectional line as FIG.
  • FIG. 14 is a plan view schematically showing a lower die moving stage and a demolding stage.
  • FIG. 15 is a cross-sectional view taken along line XV-XV in the preceding figure.
  • FIG. 16 is a front view in which a part of the detachable stage including the transfer trolley is omitted.
  • FIG. 17 is a schematic plan view of a part showing an engagement structure between the pushing and pulling means for moving the lower die and the lower die.
  • FIG. 18 is a front view of a part of the above.
  • Fig. 19 is an enlarged front view showing the outline of the demolding device at the demolding stage. You.
  • FIG. 20 is a partial cross-sectional view showing a detached state by the above device.
  • FIG. 21 is a front view schematically showing a demolding stage and a product recovery section.
  • FIG. 22 is a schematic plan view of the above.
  • FIG. 23 is an explanatory diagram of a state in which a molded product is extracted at the product collection section.
  • FIG. 24 is a perspective view illustrating a two-layer structure bush to be manufactured.
  • FIG. 25 is a cross-sectional view taken along the line XXV—XXV in the above.
  • FIG. 26 is a perspective view of only the outer layer rubber of the two-layer structure bush.
  • FIG. 27 is a perspective view illustrating a bush used as a stabilizer bush.
  • the two-layered structure bush A to be molded is, for example, a cylindrical bush shown in FIGS. 24 and 25, and has an inner hole a1 through which a stabilizer bar passes, and a body outer shape. It comprises a flat surface a2 which is a contact surface to the vehicle body mounting surface, and a substantially U-shaped peripheral surface a3 which is continuous with the flat surface a2.
  • This push A was formed of an inner rubber layer A2 made of a rubber material having high slidability and an outer rubber layer A1 made of a rubber material having higher rigidity and hardness and a higher strength than the inner rubber layer A2.
  • flanges a4 and a4 are provided at both ends in the axial direction.
  • Reference symbol a5 denotes a mounting portion for mounting on the stabilizer bar.
  • the manufacturing apparatus of this embodiment includes a first molding stage 1 for molding an outer rubber A1 of a two-layer structure bush A to be molded, and an inner rubber A2.
  • a second molding stage 2 to be formed and a lower mold moving stage 4 connected to a demolding stage 3 of a molded product (a bush A) are arranged in parallel.
  • the lower die moving stage 4 and the demolding stage 3 are arranged between the first and second molding stages 1 and 2 in the parallel direction of the two molding stages 1 and 2 as shown in FIG.
  • the removal stage 3 is provided with a removal device 6.
  • a retracting stage 41 for a transfer carriage which will be described later, is continuously provided on the rear side in the parallel direction of the detachable stage 3 and the lower movable stage 4.
  • Reference numeral 8 in the figure denotes a lower mold having a mold hole 81 corresponding to the outer peripheral shape of the bush A on the upper surface side, and 10 denotes an outer layer rubber A 1 of the bush A to be molded in the first molding stage 1.
  • Reference numeral 20 denotes a first upper mold to be molded, and 20 denotes a second upper mold for molding the inner layer rubber A2 of the bush A in the second molding stage 2.
  • the lower mold 8 is appropriately transferred from the first molding stage 1 to the second molding stage 2 via the lower mold moving stage 4 as shown by a white arrow in FIG.
  • the second molding stage 2 is provided so as to be sequentially transferred to the demolding stage 3 and further from the demolding stage 3 to the first molding stage 1.
  • the outer rubber A1 and the inner rubber A2 are formed by using the two lower dies 8 having the same configuration so that the lower dies 8 are sequentially transferred as described above.
  • the first and second upper dies 10 and 20 are respectively connected to a press device (not shown) such as a hydraulic cylinder and supported so as to be vertically movable, as shown in FIG. A state in which the lower die 8 is located at a position corresponding to a lower position of the first upper die 10 in the first molding stage 1, or as shown in FIG. In the state where the lower die 8 is located at a position corresponding to the lower position of the second upper die on the molding stage 2, the first upper die 10 or the second upper die 20 is lowered respectively.
  • the lower die 8 is provided so as to be able to close and join the upper surface of the lower die 8.
  • the lower die 8 is removably fitted from above into a concave portion 80 a on the upper surface side of the lower die body 80 having a concave cross section.
  • a middle mold 82 in which the plurality of mold holes 81 are formed in two rows.
  • the middle mold 82 has a core mold portion 82a at the center in the two rows of mold hole parallel portions, and a slide core portion 82 provided detachably attached to both sides of the core mold portion 82a.
  • the side surfaces thereof are closed by the slide core portions 82b, 82b so that a mold hole 82 corresponding to the bush A is formed.
  • a rubber material for vertically penetrating the upper die 10 is provided on the upper surface of the lower die 8, particularly on the upper surface of the core die portion 8 2 a, at the time of closing and joining the first upper die 10, a rubber material for vertically penetrating the upper die 10 is provided.
  • a runner groove 84 is formed to be continuous with the sprue and to communicate with each injection gate 83 into each of the mold holes 81.
  • the middle mold 82 is withdrawn from the lower mold body 80 upward in the removal stage 3, and the slide core portions 82b, 82b are both removed from the core mold portion 82a. By being separated outward, the bush molded product is provided so as to be detachable from the core mold portion 82a.
  • the two slide cores 8 2b and 8 2b constituting the middle die 82 are connected to the slide pins 85 and 85 protruding from both sides of the core die 82 a by screwing means. On the other hand, it is supported by being loosely fitted so that it can slide. You.
  • the slide bins 85, 85 have concave grooves 80 b, which are provided on both sides of the lower mold body 80 when the middle mold 82 is fitted into the recess 80 a of the lower mold body 80.
  • the slide cores 8 2b, 8 2b can be slid on both sides by being pulled out upward when the middle mold 82 is pulled out upward. It is like that.
  • engaging projections 8a, 8 with which a lifting means such as a cylinder device to be described later can be engaged are provided.
  • a is provided.
  • Reference numeral 87 denotes an alignment hole provided on the upper surface side at each of the four corners of the lower mold body 80, and the first upper mold 10 at the first and second molding stages 1 and 2.
  • the positioning pins 17 or 27 vertically provided at the four corners of the lower surface of each of the upper molds 10 and 20 are provided with the positioning holes 8.
  • the first upper die 10 or the second upper die 20 is provided so as to be able to be closed and joined to the lower die 8 without slipping by being fitted into the lower die 8.
  • Reference numeral 80c denotes a core mold that forms a bottom surface in the recess 80a in the lower mold body 80.
  • Reference numeral 8 denotes a pin for aligning the lower die body 80 with the middle die 82. An upper end portion is fixed to the middle die 82, and a lower part is the core die 80.
  • the lower die main body 80 including c is fitted in a through hole 80 d that penetrates the lower die main body 80 in the up and down direction so as to be able to slide, and when the middle die 82 is pulled out from the lower die main body 80 upward.
  • the pin 88 is provided so as to be fitted in the through hole 80 d so that the middle mold 82 maintains a fixed positional relationship with the lower mold body 80. .
  • Reference numeral 89 denotes a through hole into which a suspension support pin, which will be described later, is fitted when the second upper mold 20 is closed.
  • the slide core portions 8 2b and 8 2b of the through hole 89 are described later. It also serves as an engagement hole for the slide core portions 82b, 82b. 8b, 8b are lower parts provided on both left and right ends of the lower die body 80.
  • Reference numeral 8c denotes a guide groove for movement provided in the width direction below the front and rear ends of the lower die body 80.
  • the first upper mold 10 includes a main body 10 a and an upper plate 10 b, and a lower surface of the main body 10 a in the upper mold 10.
  • a cavity C1 for an outer layer rubber is formed between the lower die 8 and the inner peripheral surface of the die hole 81 by being inserted into the die hole 81 when the die is closed.
  • Core pins 11 are protrudingly provided at positions corresponding to the mold holes 81 of the lower die 8 in parallel, for example, in two rows as shown in the figure.
  • the injection gate 83 is provided in the lower mold 8 so that a rubber material can be injected and injected into the cavity C1 from the side.
  • the core pin 11 is fitted inside a holding member 12 fixed to the main body 10a and held so as not to be able to be pulled out downward, and is disposed inside the holding member 12 It is pressed in the projecting direction by the elastic force of the panel member 13, and elastically presses against the lower surface of the mold hole 81 of the lower mold 8.
  • the outer peripheral surface of the core pin 11 is roughened by means such as sand blasting so as to have minute irregularities on the surface.
  • the inner peripheral surface of the outer rubber A1 becomes a rough surface having minute irregularities, thereby increasing the adhesive strength with the inner rubber A2 laminated on the inner peripheral surface.
  • a two-layer bushing excellent in the integration of the inner and outer rubber layers can be obtained, which is particularly preferable.
  • connection port 14 to which a nozzle (not shown) of an injection machine made of an outer layer rubber material is joined.
  • a sprue 15 is provided on the lower surface of the sprue 15 which is in contact with the lower die 8. The sprue 15 communicates with the runner groove 84 on the upper surface of the lower die 8 when the lower die 8 is closed and joined.
  • the second upper mold 20 can be separated as shown in FIGS. 11 to 13.
  • Upper and lower plates 20a, 20b which are joined to the upper and lower plates 20a, 20b.
  • the outer layer rubber which is slightly smaller in diameter than the pin 11 and is inserted into the mold hole 81 when the mold is closed and joined to the lower mold 8, is first molded into the mold hole 81.
  • a second core pin 21 that forms a cavity C 2 for the inner rubber A 2 with A 1 protrudes from a position corresponding to the mold hole 81 of the lower die 8. For example, as shown in the figure, they are protruded in two rows in parallel.
  • connection port 24 to which a nozzle (not shown) of an inner rubber material injection machine is joined.
  • a sprue 22 extending through the lower surface of the upper plate 20a.
  • a runner groove 23 is formed to a position above the mold hole 81 1.
  • the second upper mold 20 is connected to the lower mold 8 and the second upper mold 20 is connected to the lower mold 8 at the time of mold-close joining.
  • Each of the injection gates 26 from above the cavity C2 for the inner layer rubber is provided with a sprue 25 communicating therewith.
  • the cavity C 2 inside the outer rubber A 1 in the mold hole 81 is placed from above, that is, through the injection gate 26 different from the injection gate 83 of the outer rubber material,
  • the inner rubber material can be injected from above regardless of the runner part A1-1-1 sprue part A1-2 of the outer rubber A1.
  • the lower plate 20b is slidably fitted to a hanging support bin 28 fixed to the upper plate 20a and hanging down and having an engaging portion 28a at the lower end.
  • the lower plate 20b When the upper mold 20 is closed with respect to the lower mold 8, the lower plate 20b is in contact with the upper plate 20a, and is closed. 5 and 11, the lower plate 20b separates from the upper plate 20a and engages with the engaging portion 28a at the lower end of the support pin 28. They are provided so as to be kept at a constant interval by combining them.
  • the runner portion A2-1-1 sprue portion A2-2 of the inner layer rubber A2 is moved from one side to the upper and lower plates 2 in a state where the upper and lower plates 20a and 20b are kept at an interval.
  • the take-out means 100 may be a hand with a robot chuck, etc., or may be moved forward or backward in response to the mold opening action after vulcanization molding to chuck the runner portion A2-1-1 and the sprue portion A2-2. Any structure can be used as long as it can be taken out.
  • the hanging support pins 28 are fitted into the through holes 89 when the upper die 20 is closed with respect to the lower die 8.
  • a recess 29 capable of accommodating at least a portion A 11 of the remaining outer layer rubber A 1.
  • the runner part A1-1 and the spool part A1-2 of the outer layer rubber A1 formed in the first molding stage 1 remain on the upper surface of the lower die 8, and the spool part A1— Even if 2 is in the protruding state, the second upper mold 20 can be closed and joined to the lower mold 8 so that the inner rubber material can be injected and molded without any problem.
  • the stage 2 is provided with mounting tables 1a and 2a on each of which the lower die 8 can be set at a fixed height position, and on the underframe 4a of the lower die moving stage 4, the lower die 8
  • the die 8 can be transferred to the demolding stage 3 while being mounted on the mounting table 1a, 2a at substantially the same height as that of the mounting tables 1a and 2a, and can be transferred from the first molding stage 1 to the second molding stage 2.
  • the moving means and device will be described.
  • a cylinder device 91 as a pushing and pulling means for pushing and pulling the lower die 8 from the mounting table 1 a to the lower die moving stage 4 is provided.
  • This cylinder device 91 has an engagement means 91 b at the tip of the output shaft 91 a, and the engagement means 91 b is provided on the left and right sides of the lower die body 80 of the lower die 8. It is provided so as to be freely engageable with and disengageable from an engaging projection 8b protruding from one side end.
  • a support plate 91c is attached to the tip of the output shaft 91a of the cylinder-device 91,
  • a slide block 91e is provided on the support plate 91c so as to be able to slide in the front-rear direction via linear guide means 91d, and the lower die 8 is engaged with the slide block 91e.
  • a hook-shaped engaging portion 91 f that can be engaged with the convex portion 8 b is additionally provided, and the slide block 91 e is slid in the front-rear direction by the operation of the cylinder device.
  • the engaging piece 91f is engaged with and disengaged from the engaging projection 8b.
  • the lower die 8 is moved to the first position by the advancing and retreating action of the output shaft 91 a of the cylinder device 91 in a state in which the engagement piece 91 f is engaged with the engagement projection 8 b. It is configured to be pushed from the molding stage 1 to the lower mold moving stage 4 or to be drawn from the lower mold moving stage 4 to the first molding stage 1.
  • the lower die 8 is moved from the mounting table 2 a to the mounting table 2 a of the second molding stage 2, facing the cylinder device 91 of the first molding stage 1.
  • a cylinder unit 92 as a pushing / pulling unit for pushing and pulling the stage 4 out and in is provided to face the cylinder unit 91.
  • the cylinder device 92 will not be described in detail, It has substantially the same configuration as that of the cylinder device 91, and the engagement means 9 2b which can be disengaged from the engagement projection 8b at the other side end of the lower die 8 outputs
  • the output shaft 92a is provided at an end portion of the shaft 92a (FIG. 1), and is configured so that the lower die 8 can be pushed and pulled by the reciprocating action of the output shaft 92a.
  • the transfer carriage 40 in the lower die moving stage 4 is separated from the lower die moving stage 4 by the linear guide means 42 on the underframe 4a. It is provided so as to be able to reciprocate in the direction in which the mold stages 3 are connected (the front-back direction orthogonal to the parallel direction of the two molding stages 1 and 2).
  • the transfer carriage 40 holds the lower die 8 sent out from the second molding stage 2 at a position between the first and second molding stages 1 and 2 and moves the carriage 40 by moving the carriage 40.
  • It has an upper holding section 43 for transferring to the removal stage 3, and is located between the first and second molding stages 1, 2 when the upper holding section 43 is located on the removal stage 3. Further, it has a slide moving section 4 that allows the lower mold 8 to be transferred from the first molding stage 1 to the second molding stage 2.
  • the front and rear portions of the slide moving portion 44 include hook-shaped engagement with the widthwise grooves 8 c, 8 c at the lower portion of the front and rear end portions of the lower die 8.
  • the guide members 45, 45 are provided so that the lower die 8 can be transferred while maintaining a constant posture without displacement.
  • guide members 46, 46 engaging with the concave grooves 8c, 8c of the lower die 8 fed on the upper holding portion 43 at the front and rear portions of the upper holding portion 43.
  • Various driving mechanisms can be used as driving means for reciprocating the transfer carriage 40 in the front-rear direction.
  • a cylinder unit 47 is provided on the lower surface of the transfer carriage 40.
  • the output shaft is connected, and is provided so as to reciprocate by the operation of the cylinder unit 47.
  • 48 a is a stopper for moving the transfer carriage 40 forward (toward the demolding stage 3 side).
  • 48 b denotes a stopper portion at the time of moving to the rear side, whereby the transfer carriage 40, which reciprocates by the operation of the cylinder device 47, is moved to a predetermined position. You can stop it.
  • moving guides 40 that allow the passage of engagement convex portions 8b, 8b provided on both left and right end portions of the lower die body 80 of the lower die 8 are provided.
  • a, 40a are provided to face each other, so that the lower die 8 to be transferred can be transferred while restricting the lateral displacement.
  • Pushing means 50, 50 are provided for engaging with the engaging projections 8 a, 8 aJ provided at both ends to push up and withdraw the lower mold body 80.
  • supporting proxies 49 and 49 are respectively provided at front and rear portions of the upper holding portion 43, and the supporting blocks 49 and 49 are provided.
  • a hanging rod 51, 51 extending downward from 9 is provided, and a supporting substrate 52 is fixedly attached to lower ends of both rods, and a cylinder device 5 for lifting up the supporting substrate 52 is provided.
  • 3 is fixed with the output shaft facing upward.
  • the output shaft of the cylinder device 53 is connected to an elevating support plate 54 disposed above the support substrate 52.
  • Push-up ports 55, 55 that penetrate the support blocks 49, 49 so as to be able to move up and down are connected to both front and rear ends of the lifting support plate 54, and the cylinder device 53 operates when the cylinder device 53 operates. It moves up and down together with the lifting support plate 54.
  • the upper ends of the push-up rods 55, 55 have cross sections that are fitted to engaging projections 8 a, 8 a at the front and rear ends of the middle die 82 of the lower die 8 so as to be able to slide in the left-right direction.
  • a substantially C-shaped engagement guide 56, 56 is attached.
  • the engagement guides 56, 56 are configured such that the upper holding section 43 is configured to allow the first and second molding When the lifting rods 55 and 55 are located between the first and second stages and the lifting rods 55 and 55 are at the lowering position, the engagement of the lower mold 8 sent from the second stage 2 onto the upper holding portion 43 is performed.
  • the projections 8a, 8a are provided so as to be fitted and locked.
  • the push-up ports 55, 55 move up together with the elevating support plate 54 by the operation of the cylinder unit 53, whereby the engagement is achieved.
  • the middle mold 82 engaged with the guides 56, 56 is configured to be pushed up to a predetermined height above the lower mold body 80 and to be removed.
  • the removal height of the middle mold 82 is set so that the pin 8 8 for positioning the lower mold 8 does not come off the lower mold body 80, and the push-up height is the removal mold described later. This is the position where the molded product is released from the mold by the device 6.
  • a slide core portion of the middle mold 82 is provided above the removal stage 3 as a mold removal device 6 for the molded product from the pushed middle mold 82.
  • Separation means for separating 8 2 b, 8 2 b to the left and right sides from the core mold part 8 2 a, and molded products etc. In addition to molded bush A, runner portion A 1-1— sprue of outer layer rubber) And a receiving means for removing the part A 1 -2 etc.) from the core mold part 82a.
  • the removal receiving means for the molded product or the like has the following configuration.
  • a movable table movable between an upper position of the demolding stage 3 and an upper position of a product recovery unit 7 described below, on a gantry 62 arranged above a lifting height position of the middle die 82.
  • the moving base 63 is provided with a lifting base 65 that is supported by the downwardly oriented cylinder device 64 to be able to move up and down.
  • the elevation base is activated by the operation of the cylinder device 64.
  • the support pins 66, 66 in the two rows on the left and right are respectively connected to a cylinder unit 67, 67 attached to the lower surface of the elevating base 65 and movable back and forth in the left and right directions. 68, and are supported so as to be displaceable left and right outward by the operation of the cylinder device 67, 67, and after the slide core portions 82b, 82b are separated from each other,
  • the cylinder devices 6 7, 67 By operating the cylinder devices 6 7, 67, the molded product in the left and right directions is inserted into the molded product and left and right outwards while being fitted into the molded product. It is peeled outward, removed from the mold, and then lifted upward by the operation of the cylinder device 64.
  • Reference numeral 69 denotes a guide rail for moving the movable table 63 provided on the base 62
  • reference numeral 70 denotes a cylinder unit for moving the movable table 63.
  • the elevating base 65 provided on the moving table 63 can be lowered by the operation of the cylinder unit 64 when the moving table 63 is located above the product collection section 7. 6, 66 can be lowered to a product extraction position provided in the product collection section 7.
  • the product of the product collection section 7 At the extraction position, as shown in FIGS. 22 and 23, product extraction plates 7 1, 7 1 having notches 7 2, 7 2 which can be fitted to the support pins 66, 66 facing left and right. Is provided.
  • the support pins 66, 66 holding the molded product are lowered, the product extracting plates 66, 66 are moved to the support pins 66, 66 by the operation of the cylinder devices 73, 73.
  • the support pins 66 and 66 rise in this state, the molded product comes out of the support pins 66 and falls.
  • 74 is a conveying means for collecting the falling molded article.
  • the outer rubber A1 and the inner rubber A2 are laminated and formed.
  • the manufacturing process will be described. First, in a state where one lower die 8 is positioned on the first molding stage 1, the first upper die 10 is lowered by operating the press device, and the first core pin 11 is moved to the lower die.
  • the lower die 8 is inserted into the die hole 81 of the lower die 8 and is closed and joined to the upper surface of the lower die 8 (FIG. 9A).
  • a cavity C1 for the outer rubber layer is formed between the hole 81 and the inner peripheral surface (FIGS. 9A and 9B).
  • the outer layer rubber material injected from the injection machine connected to the first upper mold 10 is fed through the sprue 15 and the runner groove 84, and the side of the mold hole 11 is formed.
  • the cavity C1 is injected from the injection gate 83 into the cavity C1, and the outer rubber A1 is vulcanized or semi-vulcanized (FIG. 10).
  • the first upper mold 10 is raised by the operation of the press device and separated from the lower mold 8. At this time, the molded outer layer rubber A1 remains in the mold hole 81, and a part of the runner A11 and a part of the sprue A1-2, which are continuous with the part, remain. (Fig. 3, (2)).
  • the lower die 8 is moved to the second molding stage 2 via the lower die moving stage 4 by the operation of the cylinder devices 91 and 92 as push-pull means ((3) in FIG. 3). . That is, at this time, in the lower die moving stage 4, the upper holding part 43 of the transfer carriage 40 is moving to the demolding stage 3 side, and the slide moving part 44 is moved by both the first and the second. It is located between the molding stages 1 and 2.
  • the lower die 8 is sent out from the mounting table 1 a onto the slide moving part 44 by the cylinder device 91 on the first molding stage 1 side, and the cylinder device on the second molding stage 2 side
  • the lower mold 8 is put on the second molding stage 2 by engaging the engagement means 9 2 b of the second 2 with the engagement convex portion 8 b and pulling it onto the mounting table 2 a of the second molding stage 2. Can be transported.
  • the second upper mold 20 for inner layer molding is lowered by the operation of the press device, and the support pins 28 for suspension are fitted into the through holes 89.
  • the upper and lower plates 20a and 20b are joined together, and the mold is closed and joined to the upper surface of the lower mold 8, and at the same time, the second core pin 21 of the upper mold 20 is inserted into the mold hole 8 1 Insert the inside of the outer layer rubber A 1 inside Then, a cavity C2 for the inner layer rubber is formed inside the outer layer rubber A1 in the mold cavity 81 (FIGS. 12A and 12B).
  • a recess 29 is provided on the lower surface of the lower plate 20b, and at least a part of the remaining outer layer rubber A1 sprue a5 is accommodated in the recess 29. Therefore, the mold can be closed and joined without any problem as described above.
  • the inner rubber material injected from the injection machine connected to the second upper mold 20 is supplied to the outer layer via the sprue 22, the runner groove 23 and the sprue 25.
  • a rubber material is injected into the cavity C2 from an injection gate 26 from above different from the injection gate 83, and vulcanization molding is performed so that the inner rubber A2 is laminated and adhered to the inside of the outer rubber A1.
  • the vulcanization time at this time is appropriately set according to the rubber material and the molded product. Even if the outer rubber A1 is in a semi-vulcanized state, it is completely vulcanized together with the inner rubber A2 by the vulcanization molding in the second molding stage 2.
  • the second upper mold 20 is lifted and separated from the lower mold 8.
  • the upper plate 20a of the second upper die 20 is engaged with the lower plate 20b by the engaging portion 28a at the lower end of the suspension support bin 28 included therein. And separate the upper and lower plates 20a and 20b, and then separate the lower plate 20b from the lower die 8.
  • a part A 2-1 ⁇ sprue part A 2-2 of the inner rubber layer A 2 generated between the upper and lower plates 20 a and 20 b is removed by the removing means 100 and discarded. Is done.
  • the molded product (the bush A) composed of the molded inner and outer layer rubbers A 2 and A 1 is retained while remaining in the mold hole 81 of the lower mold 8 (3 in FIG. 3).
  • the lower die 8 is sent out to the lower die moving stage 4 by the operation of the cylinder device 92.
  • the transfer carriage 40 of the lower die moving stage 4 has already moved backward, and the upper holding section 43 provided at the front of the transfer carriage 40 Is located between the first and second molding stages 1 and 2, so that the lower die 8 is mounted on and held by the upper mounting holder 43.
  • Pushing means 50, 50 having engagement guides 56, 56 at the upper ends of the push-up rods 55, 55 are provided at the front and rear portions of the upper holding portion, respectively.
  • Engagement projections 8a, 8a at the front and rear ends of the middle mold 82 of the lower mold 8 are fitted to the dos 56, 56, respectively, and held in the engaged state.
  • the lifting ports 55, 55 are raised via the lifting support plate 54, and engaged with the engagement guides 56, 56.
  • the middle mold 82 is withdrawn from the recess 80a of the lower mold body 80 upward, and is pushed up to the removal position at a predetermined height.
  • the fitting pins 61, 61 as pulling-out means provided above both sides are provided with through-holes 89, which are provided in the slide core portions 82b, 82b on both sides of the middle size 82. 9 and the through-holes 8 9, 8 9 in both slide cores 8 2 b, 8 2 b are fitted by pushing up the middle size 8 2 as described above.
  • the pins 61 and 61 are fitted.
  • the support pins 66, 66 rise while holding the molded product, and the slide cores 82b, 82b return to a state in which they are in contact with the core mold 82a. .
  • the push-up ports 55, 55 are lowered, so that the middle mold 82 is fitted into the recess 80a of the lower mold body 80.
  • the transfer carriage 40 moves rearward, and the upper holding section 43, that is, the lower die 8 placed on the upper holding section 43 is moved to a position between the first and second forming stages 1 and 2.
  • the cylinder unit 91 as a pushing and pulling means of the first molding stage 1 advances, and the engaging means 91b at the tip thereof is provided at the side end of the lower die body 80.
  • the lower die 8 is engaged with the engaging projection 8 b and is retracted by the operation of the cylinder device 91 in the retreating direction, and is pulled into the first molding stage 1.
  • the outer layer rubber A1 is molded on the lower mold 8 in the same manner as described above.
  • the support pins 66 and 66 of the removal receiving means return to the original state at the ascending position, and move up and down with the movement of the moving base 63 by the operation of the cylinder unit 70.
  • the product is moved to the upper position of the product collection section 7 together with the table 65, and thereafter, the molded product held by the support pins 66, 66 is extracted and collected by the above-described means.
  • the lower die 8 is moved from the first molding stage 1 to the lower die moving stage 4, the second molding stage 2, the lower die moving stage 4, the demolding stage 3, the lower die moving stage 4,
  • the two-layer structure bush can be repeatedly and efficiently molded while being transferred in the order of the molding stage 1. Since the lower die 8 is moved in this way, the transfer structure is simplified, and the lower die 8 can be accurately and quickly moved by using, for example, a cylinder device.
  • one lower die 8 is mounted on the upper holding part 43 of the transfer carriage 40 and transferred to the demolding stage 3 while being transferred to the demolding stage 3.
  • the lower mold 8 passes from the first molding stage 1 through the slide moving section 44 of the transfer carriage 40 on the lower mold moving stage 4.
  • the time required for vulcanization molding of the outer rubber A 1 and the inner rubber A 2 is the same as before, while the outer rubber A 1 is being molded with one lower mold 8 while the other rubber is being molded.
  • the inner rubber A2 can be molded or the molded product can be removed with the lower die 8, so that the operation efficiency in each stage can be increased, and the production efficiency and productivity of the two-layer push can be increased.
  • the molding die of the present invention is made of a rubber elastic material for the purpose of suppressing friction noise and improving riding comfort for a two-layer bush used for a stabilizer bush of a vehicle and the like, in particular, a slider bar.
  • the present invention can be suitably used for manufacturing a bush having a two-layer structure of an inner layer rubber made of a rubber material having high mobility and an outer layer rubber made of a rubber material having higher rigidity and hardness than the inner layer rubber. Implementation can be facilitated and the production efficiency can be increased.

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

Abstract

L'invention se rapporte à un moule métallique permettant de mouler une douille faite d'une structure à double couche et capable de fabriquer efficacement la douille. Ce moule comprend un premier châssis (10) pour la formation de la couche externe, un second châssis (20) pour la formation de la couche interne, et un élément de résistance (8) doté d'une pluralité d'orifices de moule (81) qui sont communs aux deux châssis combinés l'un à l'autre, un premier noyau (11) formant une cavité (C1) pour la couche en caoutchouc externe étant installé par projection sur la surface inférieure du premier châssis (10) dans l'espace mort de celui-ci depuis les surfaces périphériques internes des orifices du moule, et une seconde broche de noyau (21) formant une cavité (C2) pour la couche en caoutchouc interne étant installée par projection sur la surface inférieure du second châssis (20) dans l'espace mort de celui-ci depuis une couche en caoutchouc externe (A1) de manière que les cavités (C1) et (C2) puissent être formées par serrage de ces deux châssis (10) et (20).
PCT/JP2003/007518 2003-06-12 2003-06-12 Moule metallique de moulage d'une douille faite d'une structure a double couche Ceased WO2004110723A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2003/007518 WO2004110723A1 (fr) 2003-06-12 2003-06-12 Moule metallique de moulage d'une douille faite d'une structure a double couche
AU2003242359A AU2003242359A1 (en) 2003-06-12 2003-06-12 Metal mold for molding bush of double-layer structure
JP2004564065A JP4187168B2 (ja) 2003-06-12 2003-06-12 二層構造ブッシュの成形金型

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/007518 WO2004110723A1 (fr) 2003-06-12 2003-06-12 Moule metallique de moulage d'une douille faite d'une structure a double couche

Publications (1)

Publication Number Publication Date
WO2004110723A1 true WO2004110723A1 (fr) 2004-12-23

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JP (1) JP4187168B2 (fr)
AU (1) AU2003242359A1 (fr)
WO (1) WO2004110723A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386763A (en) * 1977-01-11 1978-07-31 Kanto Seiki Co Production of foamed molded article
JPS62176818A (ja) * 1986-01-31 1987-08-03 Matsuda Seisakusho:Kk 射出成形品の樹脂バリ自動除去装置
JPS6478810A (en) * 1987-09-21 1989-03-24 Nanshin Kk Manufacture of wheel employing tow-color injection molding machine
JPH02273216A (ja) * 1989-04-14 1990-11-07 Daikyo Inc 二重成形方法および型構造
WO1991002640A1 (fr) * 1989-08-14 1991-03-07 Jens Ole Sorensen Moulage par injection a plusieurs composants et a injection sequentielle
JPH10169711A (ja) * 1996-12-05 1998-06-26 Toyoda Gosei Co Ltd ブッシュ
JP2002031179A (ja) * 2000-07-14 2002-01-31 Toyoda Gosei Co Ltd 車両用スタビライザブッシュ
JP2002036289A (ja) * 2000-07-31 2002-02-05 Oshima Denki Seisakusho:Kk 中空状成形体およびその製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386763A (en) * 1977-01-11 1978-07-31 Kanto Seiki Co Production of foamed molded article
JPS62176818A (ja) * 1986-01-31 1987-08-03 Matsuda Seisakusho:Kk 射出成形品の樹脂バリ自動除去装置
JPS6478810A (en) * 1987-09-21 1989-03-24 Nanshin Kk Manufacture of wheel employing tow-color injection molding machine
JPH02273216A (ja) * 1989-04-14 1990-11-07 Daikyo Inc 二重成形方法および型構造
WO1991002640A1 (fr) * 1989-08-14 1991-03-07 Jens Ole Sorensen Moulage par injection a plusieurs composants et a injection sequentielle
JPH10169711A (ja) * 1996-12-05 1998-06-26 Toyoda Gosei Co Ltd ブッシュ
JP2002031179A (ja) * 2000-07-14 2002-01-31 Toyoda Gosei Co Ltd 車両用スタビライザブッシュ
JP2002036289A (ja) * 2000-07-31 2002-02-05 Oshima Denki Seisakusho:Kk 中空状成形体およびその製造方法

Also Published As

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JPWO2004110723A1 (ja) 2006-07-20
JP4187168B2 (ja) 2008-11-26
AU2003242359A1 (en) 2005-01-04

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