JP2010131926A - Molding die and method of immobilizing molding die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of retaining an exclusive member in a general-purpose member using a comparatively smaller force, when a cavity side part and a movable half of mold are divided into the exclusive member and the general-purpose member. <P>SOLUTION: The cavity side part 10 and the movable half of mold 20 are divided into exclusive members 11 and 21 with cavity forming surfaces 11a and 21a, and general-purpose members 12 and 22 having no cavity forming surface. Next, the exclusive members 11 and 21 are detachably fitted into a recessed part formed in the general-purpose members 12 and 22 in a direction A where the cavity side part 10 and the movable half 20 of mold come into contact with or separate from each other. In addition, a hole is opened in transverse walls 11b and 21b of the exclusive members 11 and 21, and a bar member plunging into the hole opened in the exclusive members 11 and 21, is arranged in the sidewall of the recessed part in the way that the bar member can freely shift to a state in which the bar member finds its way into the recessed part from the side wall or a state in which the bar member retracts into the side wall. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a molding die and a fixing method thereof, and belongs to the technical field of improvement of changeover accompanying die replacement.

  In recent years, with the generalization of high-mix low-volume production in a production line, for example, in a casting factory such as a cylinder block of an automobile engine, there is a tendency that the frequency of changeover accompanied with die change increases. In order to reduce cycle time, achieve complex product shapes, and achieve high dimensional accuracy for thin-walled parts, for example, in high pressure die casting, high temperature molten aluminum alloy is filled into the cavity at high speed and pressure. Is done. Therefore, there is a case where the frequency of changeover accompanied with mold replacement increases due to the severe wear of the mold and shortening of the mold life.

  Therefore, conventionally, the fixed mold and the movable mold are divided into a dedicated member having a cavity forming surface and a general-purpose member not having a cavity forming surface. It is known to reduce the cost and mold cost.

  Specifically, the general-purpose member is provided with a recess that opens to the opposing surface side (matching surface side) of the fixed type and the movable type, and the dedicated member is attached to and detached from the recess in the direction of contact and separation between the fixed type and the movable type. Fits freely. In that case, in Patent Document 1, a general-purpose member is provided with a T-shaped clamp extending in a contact and separation direction of a fixed type and a movable type from the bottom surface of the recess toward the back surface of the dedicated member, and the axial direction of the T-shaped clamp is It is disclosed that the exclusive member is engaged with the T-shaped head of the T-shaped clamp and retracted into the recess by moving and rotating about the axis, and the exclusive member is detachably held by the general-purpose member.

Japanese Patent No. 3794323 (paragraphs 0012 and 0049)

  However, in the above prior art, the direction in which the T-shaped clamp pulls the dedicated member into the recess coincides with the contact and separation directions of the fixed mold and the movable mold. The separation force generated between them acts directly in the movement direction of the T-shaped clamp, and as a result, a relatively large clamping force is required to stably hold the dedicated member on the general-purpose member against the separation force. The actuator for generating the clamping force, such as a hydraulic cylinder, is increased in size.

  Therefore, the present invention allows the dedicated member to be attached to and detached from the general-purpose member so that it can sufficiently counter the separation force when the mold is opened with a relatively small force when the fixed mold and the movable mold are divided into the dedicated member and the general-purpose member. It is an issue to hold.

  In order to solve the above problems, the present invention uses the following means. In the following disclosure of the present invention, reference numerals used in the embodiments of the invention described later are added for reference.

  First, the invention according to claim 1 of the present application is that the fixed mold 10 and the movable mold 20 include dedicated members 11 and 21 having cavity forming surfaces 11a and 21a and general-purpose members 12 and 22 having no cavity forming surfaces. And the dedicated members 11 and 21 are detachably fitted in the contact and separation direction A of the fixed mold 10 and the movable mold 20 with respect to the recesses 13 and 23 provided in the general-purpose members 12 and 22. In the mold, when the dedicated members 11 and 21 are fitted into the recesses 13 and 23, the side walls 11b and 21b of the dedicated members 11 and 21 come into contact with the side walls 13a and 23a of the recesses 13 and 23, respectively. Holes 14 and 24 are provided, and the side walls 13a and 23a of the recesses 13 and 23 are advanced from the side walls 13a and 23a into the recesses 13 and 23 and retreated into the side walls 13a and 23a. Rod members 15 and 25 are provided which enter into the holes 14 and 24 by advancing when the dedicated members 11 and 21 are fitted into the recesses 13 and 23, respectively. , 24 and the bottom walls 13b, 23b of the recesses 13, 23 in the bar members 15, 25; the surfaces 14a, 24a; 15a, 25a, when the bar members 15, 25 enter the holes 14, 24 The taper surfaces are in contact with each other.

  Next, the invention according to claim 2 of the present application is the molding die according to claim 1, wherein the tapered surfaces 14a and 24a of the holes 14 and 24 are formed on the main bodies 11e and 11e of the dedicated members 11 and 21, respectively. 21e and separate members 11f and 21f.

  Next, in the invention according to claim 3 of the present application, in the molding die according to claim 1, when the rod members 15 and 25 enter the holes 14 and 24, the holes 14 and A gap S is formed between the surfaces 14b, 24b opposite to the taper surfaces 14a, 24a of 24 and the surfaces 15b, 25b opposite to the taper surfaces 15a, 25a of the rod members 15, 25. It is configured.

  Next, in the invention described in claim 4 of the present application, the fixed mold 10 and the movable mold 20 include dedicated members 11 and 21 having cavity forming surfaces 11a and 21a, and general-purpose members 12 and 22 having no cavity forming surfaces. Molding in which the dedicated members 11 and 21 are detachably fitted in the contact / separation direction A of the fixed mold 10 and the movable mold 20 with respect to the recesses 13 and 23 provided in the general-purpose members 12 and 22. A method for fixing a metal mold, wherein when the dedicated members 11 and 21 are fitted in the recesses 13 and 23, the side walls of the dedicated members 11 and 21 that come into contact with the side walls 13a and 23a of the recesses 13 and 23, respectively. Holes 14 and 24 are provided in 11b and 21b, and the side walls 13a and 23a of the recesses 13 and 23 are advanced from the side walls 13a and 23a into the recesses 13 and 23 and retracted into the side walls 13a and 23a. Shi The rod members 15 and 25 are provided to enter the holes 14 and 24 by advancing when the dedicated members 11 and 21 are fitted into the recesses 13 and 23, respectively. Surfaces 14a, 24a; 15a, 25a on the bottom walls 13b, 23b side of the recesses 13, 23 in the hole portions 14, 24 and the rod members 15, 25 are connected to the hole portions 14, 24 in the rod members 15, 25. Using the molding dies that have tapered surfaces that come into contact with each other when they enter, the rod members 15 and 25 are retracted into the side walls 13a and 23a, and the dedicated members 11 and 21 are moved into the recesses 13 and 23, respectively. The dedicated members 11 and 21 are moved to a predetermined position before contacting the bottom walls 13b and 23b of the recesses 13 and 23, and the rod members 15 and 25 are advanced into the recesses 13 and 23. Let me before The dedicated members 11 and 21 are inserted into the recesses 13 and 24 through the mutual contact of the rod members 15 and 25 and the tapered surfaces 14a and 24a of the holes 14 and 24; 15a and 25a. 23 is moved to the bottom walls 13b, 23b side and is brought into contact with the bottom walls 13b, 23b.

  First, according to the first aspect of the present invention, the fixed mold 10 and the movable mold 20 include the dedicated members 11 and 21 having the cavity forming surfaces 11a and 21a, and the general-purpose members 12 and 22 having no cavity forming surface. And the side walls 13a and 23a of the recesses 13 and 23 provided in the general-purpose members 12 and 22, the state where the side walls 13a and 23a have advanced into the recesses 13 and 23 and the side walls 13a and 23a. The bar members 15 and 25 that are movable in the retracted state are provided, and the bar members 15 and 25 enter the holes 14 and 24 provided in the lateral walls 11b and 21b of the dedicated members 11 and 21, respectively. As a result, the dedicated members 11 and 21 cannot be removed from the recesses 13 and 23, and the dedicated members 11 and 21 are detachably held by the general-purpose members 12 and 22.

  In that case, surfaces 14a and 24a on the bottom walls 13b and 23b side of the recesses 13 and 23 in the holes 14 and 24, and surfaces 15a and 25a on the bottom walls 13b and 23b side of the recesses 13 and 23 in the rod members 15 and 25, respectively. Are tapered surfaces, and when the bar members 15 and 25 enter the holes 14 and 24, the taper surfaces 14a and 24a; 15a and 25a are in contact with each other, so that the bar members 15 and 25 advance. The dedicated members 11, 21 are moved to the bottom walls 13b, 23b of the recesses 13, 23 via the tapered surfaces 14a, 24a; 15a, 25a, and the dedicated members 11, 21 are firmly held by the general-purpose members 12, 22. Will be.

  And since the advancing direction of the rod members 15 and 25 and the contact / separation direction A of the fixed mold 10 and the movable mold 20 do not coincide with each other, the separation force generated between the fixed mold 10 and the movable mold 20 when the mold is opened. Does not act directly on the moving direction of the bar members 15, 25, but only a part of the separating force acts on the retreating side of the bar members 15, 25 via the tapered surfaces 14a, 24a; 15a, 25a. It is. Therefore, by simply pressing the bar members 15 and 25 toward the advancing side with a relatively small force, they can sufficiently resist the separation force when the mold is opened, and the dedicated members 11 and 21 are stably held by the general-purpose members 12 and 22. It becomes possible to do.

  Next, according to the invention described in claim 2 of the present application, the tapered surfaces 14a, 24a of the hole portions 14, 24 are constituted by the main bodies 11e, 21e of the dedicated members 11, 21 and separate members 11f, 21f. When repairing the tapered surfaces 14a, 24a of the hole portions 14, 24 worn by friction between the tapered surfaces 14a, 24a; 15a, 25a, there is no need to replace the entire dedicated members 11, 21; Simplification and cost reduction can be achieved.

  Next, according to the third aspect of the present invention, the surfaces 14b and 24b opposite to the tapered surfaces 14a and 24a of the holes 14 and 24 and the tapered surfaces 15a and 25a of the rod members 15 and 25 are opposite to each other. Since the gap S is formed between the side surfaces 15b and 25b, the friction when the rod members 15 and 25 enter the hole portions 14 and 24 is reduced, and the rod members 15 and 25 are relatively small in force. Can be inserted into the holes 14 and 24, and the wear when the rod members 15 and 25 enter the holes 14 and 24 is reduced, so that the repair frequency of the rod members 15 and 25 and the holes 14 and 24 can be increased. Will be reduced.

  In addition, the holes 14 and 24 and the rod member 15 are moved while the dedicated members 11 and 21 are moved to the bottom walls 13b and 23b of the recesses 13 and 23 via the tapered surfaces 14a and 24a; , 25 on opposite sides 14b, 24b; 15b, 25b are in contact with each other, and the dedicated members 11, 21 are not yet in contact with the bottom walls 13b, 23b of the recesses 13, 23, but the rod members 15, 25 The problem that the advancement of is prevented is avoided.

  Next, according to the invention described in claim 4 of the present application, when the dedicated members 11 and 21 are moved to a predetermined position before contacting the bottom walls 13b and 23b of the recesses 13 and 23, the rod member 15 is moved. , 25 are inserted into the holes 14, 24, and the dedicated members 11, 21 are moved to the bottom walls 13b, 23b side of the recesses 13, 23 through mutual contact of the tapered surfaces 14a, 24a; 15a, 25a. Since the dedicated members 11 and 21 do not strike the bottom walls 13b and 23b of the recesses 13 and 23 vigorously, the dedicated members 11 and 21 and the general-purpose members at the time of the changeover are brought into contact with the bottom walls 13b and 23b. Thus, the deformation and damage of 12 and 22 are avoided. In particular, an advantageous effect can be obtained when the weights of the dedicated members 11 and 21 and the weights of the fixed mold 10 and the movable mold 20 are relatively large.

  FIG. 1 is a cross-sectional view schematically showing the arrangement of main components of a die casting machine 1 according to the best mode of the present invention from the side, wherein (a) shows a mold open state, (b) Indicates a clamping state.

  This die casting machine 1 is a high pressure die casting machine for casting a cylinder block of an automobile engine, and is made of an aluminum alloy in order to shorten the cycle time, realize a complicated product shape, realize a high dimensional accuracy of a thin part, etc. The high-temperature molten metal is filled into the cavity C at high speed and high pressure. Therefore, there is a tendency that the frequency of changeover accompanied with mold replacement tends to increase due to severe wear of the mold and shortening of the mold life.

  Therefore, in this die casting machine 1, the fixed mold 10 is divided into a core 11 as a dedicated member having a cavity forming surface 11a and a holder 12 as a general-purpose member having no cavity forming surface. Similarly, the movable die 20 is also divided into a core 21 as a dedicated member having a cavity forming surface 21a and a holder 22 as a general-purpose member having no cavity forming surface. Further, by changing only the cores 11 and 21 at the time of changing the settings, the changing work is facilitated, the die cost is reduced, and the like.

  Here, generally, when it is referred to as a mold or a mold for molding, the fixed mold 10 and the movable mold 20 including the cores 11 and 21 and the holders 12 and 22 are collectively referred to.

  That is, in this embodiment, the die casting machine 1 has a machine base 2 on which a square wall-like fixed platen 3 and a square wall-like fixed block 4 are spaced apart from each other at a predetermined interval. It is standing and facing up. Between the fixed platen 3 and the fixed block 4, four tie bars 5 ... 5 (only two are shown in FIG. 1) are installed horizontally. Each tie bar 5 is arranged in the vicinity of each corner of the square wall-shaped fixed platen 3 and fixed block 4 and spaced from each other (see FIG. 5).

  Further, a square wall-shaped movable platen 6 is erected on these tie bars 5... 5 so as to be opposed to the fixed platen 3 and the fixed block 4. A drive rod 7 is connected to the back surface of the movable platen 6, and the movable platen 6 is moved in the horizontal direction along the tie bars 5... 5 by an appropriate actuator, for example, a hydraulic cylinder 8. It is moved in the contact / separation direction A.

  The fixed mold 10 and the movable mold 20 are assembled to the mutually facing surfaces of the fixed platen 3 and the movable platen 6, respectively. More specifically, the holders 12 and 22 of the fixed mold 10 and the movable mold 20 are coupled to the fixed platen 3 and the movable platen 6, and the cores 11 and 21 are detachably attached to the opposing surfaces of the holders 12 and 22, respectively. Is held in.

  When the molds are in contact, that is, when the molds are clamped, the opposing surfaces of the cores 11 and 21 are in contact with each other as shown in FIG. A cavity C is formed.

  Next, FIG. 2 shows the replacement operation of the cores 11 and 21 when the die casting machine 1 is changed, more specifically, the mounting operation to the holders 12 and 22 in the order of (a), (b) and (c). It is sectional drawing schematically illustrated from a side surface.

  The holders 12 and 22 of the fixed mold 10 and the movable mold 20 are provided with recesses 13 and 23 that open on the opposite surfaces, and the cores 11 and 21 are in contact with the recesses 13 and 23 in the mold. It is detachably fitted in the separation direction A.

  Although individual details will be described later, the operation of fitting the cores 11 and 21 into the recesses 13 and 23 will be outlined. First, as shown in FIG. 2A, the holders 12 and 22 from which the cores 11 and 21 are removed are separated from each other. The changeover device 30 is carried between the separated holders 12 and 22. The change-over device 30 is a carry-in conveyor 31 that extends horizontally in a direction perpendicular to the contact / separation direction A, and a fitting conveyor that is placed on the carry-in conveyor 31 and extends horizontally in the contact / separation direction A (see FIG. Examples include a roller conveyor 32.

  The core 11 of the fixed mold 10 and the core 21 of the movable mold 20 are joined together in advance so as to form a cavity C, and unitized (joined unit U). In a state where the coupling unit U is placed on the fitting conveyor 32, the whole of the coupling unit U and the fitting conveyor 32 is carried between the holders 12 and 22 from the outside of the die casting machine 1 by the loading conveyor 31. Is done.

  As shown in FIG. 2B, the pusher 33 belonging to the changeover device 30 presses the coupling unit U toward the holder 12 of the fixed mold 10, and the core 11 of the fixed mold 10 in the coupling unit U is fixed to the fixed mold 10. It fits into the recess 13 of the holder 12.

  As shown in FIG. 2C, when the back wall of the core 11 of the fixed mold 10 abuts against the bottom wall of the recess 13, the fitting of the core 11 to the recess 13 is completed on the fixed mold 10 side. The change-over device 30 is carried out of the die casting machine 1.

  Next, the holder 22 of the movable mold 20 is moved to the mold clamping side, and the core 21 of the movable mold 20 in the coupling unit U is fitted into the recess 23 of the holder 22 of the movable mold 20. When the back wall of the core 21 of the movable mold 20 comes into contact with the bottom wall of the recess 23, the fitting of the core 21 into the recess 23 is completed on the movable mold 20 side. The situation at this time is similar to that shown in FIG.

  Then, when the coupling of the coupling unit U is released, the cores 11 and 21 are held by the holders 12 and 22 in each of the fixed mold 10 and the movable mold 20. The situation at this time is similar to that shown in FIG.

  In this way, the cores 11 and 21 are not separately held by the holders 12 and 22 in the fixed mold 10 and the movable mold 20, but the cores 11 and 21 are integrated with the coupling unit U in advance. Since the unit U is released after the holders 12 and 22 are fitted together, the cavity C is formed with high accuracy when the fixed mold 10 and the movable mold 20 are clamped.

  Next, FIG. 3 is a side view showing a stage in which the coupling unit U is moved toward the holder 12 of the fixed mold 10, and FIG. FIG. 5 is a schematic view seen from the direction of the arrow v in FIG. 4, and FIG. 6 is a diagram illustrating a state in which the core 11 on the fixed mold 10 side has been fitted into the recess 13. FIG. 7 is a side view showing the stage, FIG. 7 is a side view showing the stage where the coupling unit U is fitted to the recess 23 of the holder 22 of the movable mold 20 to a predetermined position, and FIG. It is a side view which shows the step which the fitting to the recessed part 23 of was completed.

  When the cores 11 and 21 are fitted in the recesses 13 and 23, the lateral walls 11b and 21b of the cores 11 and 21 and the side walls 13a and 23a of the recesses 13 and 23 face each other. The horizontal walls 11b and 21b are provided with holes 14 and 24 extending vertically in a direction perpendicular to the contact / separation direction A.

  Further, through holes 13c and 23c extending vertically in the direction orthogonal to the contact / separation direction A are provided in the side walls 13a and 23a of the recesses 13 and 23, respectively. The through holes 13c and 23c are fitted with rod members 15 and 25 that extend in the vertical direction in the same direction perpendicular to the contact / separation direction A. The rod members 15 and 25 are not shown in the drawings, for example, hydraulic cylinders. Is moved in the vertical direction along the through holes 13c and 23c, that is, in the direction B perpendicular to the contact / separation direction A.

  As a result, the rod members 15 and 25 are advanced from the side walls 13a and 23a into the recesses 13 and 23 (see FIGS. 6, 7 and 8), and are retracted into the side walls 13a and 23a (FIGS. 5)). Then, when the cores 11 and 21 are engaged with the recesses 13 and 23, the rod members 15 and 25 enter the holes 14 and 24, respectively.

  The coupling unit U is integrated by a coupling mechanism 40. That is, the coupling mechanism 40 includes a plate 41 assembled to the left and right lateral walls 11b, 11b of the core 11 on the fixed mold 10 side by bolts 42, and the core 21 on the movable mold 20 side with the plate 41 interposed therebetween. And a connecting pin 43 to be inserted into the side surface.

  On the fixed mold 10 side, a positioning mechanism is provided when the coupling unit U starts to be fitted into the recess 13. That is, a plurality of roller followers 52... 52 are arranged in a row in the fitting direction on the upper side of the core 11 on the fixed mold 10 side and the left and right lateral walls 11 b. The roller followers 52... 52 are provided in recesses 52 a formed in the lateral walls 11 b. Correspondingly, a pair of guide rails 51, 51 are arranged extending in the fitting direction on the upper side of the recess 13 on the fixed mold 10 side and on the left and right side walls 13a. As apparent from FIG. 5, the roller followers 52... 52 enter between the guide rails 51, 51, so that the position of the coupling unit U with respect to the recess 13 when the coupling unit U is fitted into the recess 13. Is now decided.

  Further, on the fixed mold 10 side, plate members 99... 99 having inclined surfaces are provided at the opening edge portions of the concave portion 13 in the vertical and horizontal directions. Correspondingly, plate members 98... 98 having inclined surfaces are provided on the upper and lower horizontal walls 11 b. Then, as apparent from FIG. 5, these two plate members 98... 98, 99... 99 come into contact with each other, so that the coupling unit U is guided to the central portion of the recess 13.

  Further, as apparent from FIG. 4, these plate members 98... 98, 99... 99 are brought into contact with each other, so that the coupling unit U is fitted into the concave portion 13 of the holder 12 of the fixed mold 10 to a predetermined position. At the stage, the fitting operation by the pusher 33 of the changeover device 30 is stopped. In this predetermined position, the back wall 11 c of the core 11 of the fixed mold 10 has not yet come into contact with the bottom wall 13 b of the recess 13. Further, at this time, the rod member 15 that is retracted into the side wall 13 a of the recess 13 faces the hole 14 of the core 11.

  Here, the surfaces 14a, 24a on the bottom walls 13b, 23b side of the recesses 13, 23 in the holes 14, 24 are tapered surfaces. Further, the surfaces 15a and 25a on the bottom walls 13b and 23b side of the recesses 13 and 23 in the bar members 15 and 25 are also tapered surfaces.

  In this state, the bar members 15 and 25 are moved in the vertical direction B, and as shown in FIG. 6, advance into the recess 13 and enter the hole 14 of the core 11. Thereby, the taper surfaces 14a and 24a; 15a and 25a of the said hole parts 14 and 24 and the rod members 15 and 25 mutually contact | abut. As a result, the coupling unit U moves to the bottom wall 13b side of the recess 13 at a relatively slow speed, and finally the back wall 11c of the core 11 on the fixed mold 10 side abuts against the bottom wall 13b of the recess 13. Further, the core 11 is firmly pulled into the recess 13 by being pressed against the bottom wall 13 b, and the core 11 is stably held by the holder 12. Thereby, the fitting by the side of fixed mold 10 will be completed.

  At this time, as shown in FIG. 6, the coupling unit U has the plate member 98 as a result of the contact between the inner corner inclined surface 13d on the recess 13 side and the outer corner inclined surface 11d on the core 11 side. 98, 99... 99 are firmly in contact with each other. In this state, the back wall 11 c of the core 11 on the fixed mold 10 side is firmly pressed against the bottom wall 13 b of the recess 13. In this case, as is apparent from FIG. 5, the roller followers 52 ... 52 of the core 11 do not contact the side wall 13a of the recess 13, and the guide rails 51, 51 of the recess 13 contact the side wall 11b of the core. In this case, it is ensured that the back wall 11 c of the core 11 is reliably pressed against the bottom wall 13 b of the recess 13.

  Similarly, when the fitting on the movable mold 20 side is completed, the coupling pin 43 of the coupling mechanism 40 is removed and the coupling of the coupling unit U is released as is apparent in FIG.

  In the present embodiment, even when the movable mold 20 is fitted, as shown in FIG. 7, when the coupling unit U is fitted to the concave portion 23 of the holder 22 of the movable mold 20 to a predetermined position, Movement of the movable mold 20 to the mold clamping side of the holder 22 (by the hydraulic cylinder 8 shown in FIG. 1) is stopped. Then, the driving force transmission path for the movement of the holder 22 of the movable mold 20 is cut, and in this state, the holder 22 of the movable mold 20 is connected to the coupling unit U by entering the hole 24 of the rod member 25. The back wall 21c of the core 21 on the movable mold 20 side and the bottom wall 23b of the recess 23 are brought into contact with each other at a relatively gentle speed. This is to prevent the bottom wall 23b of the recess 23 of the holder 22 of the movable mold 20 from accidentally striking the coupling unit U (in the case of movement by the hydraulic cylinder 8 shown in FIG. 1).

  However, when the movement of the holder 22 of the movable mold 20 to the mold clamping side (by the hydraulic cylinder 8 shown in FIG. 1) can be executed at a relatively slow speed, etc., instead of this, The holder 22 of the movable mold 20 is moved to the mold clamping side until the bottom wall 23b of the recess 23 comes into contact with the coupling unit U (by the hydraulic cylinder 8 shown in FIG. 1), and then the rod member 25 is inserted into the hole 24. You may rush.

  Thus, in this embodiment, the fixed mold 10 and the movable mold 20 are divided into the cores 11 and 21 having the cavity forming surfaces 11a and 21a and the holders 12 and 22 having no cavity forming surfaces. The cores 11 and 21 are detachably fitted in the contact and separation direction A of the fixed mold 10 and the movable mold 20 with respect to the recesses 13 and 23 provided in the holders 12 and 22.

  Holes 14 and 24 are provided in the lateral walls 11b and 21b of the cores 11 and 21 that come into contact with the side walls 13a and 23a of the recesses 13 and 23 when fitted into the recesses 13 and 23, respectively. On the other hand, the side walls 13a and 23a of the recesses 13 and 23 are movable between a state where the side walls 13a and 23a are advanced into the recesses 13 and 23 and a state where the side walls 13a and 23a are retracted into the side walls 13a and 23a. Bar members 15 and 25 are provided to enter the holes 14 and 24 by advancing when 21 is fitted in the recesses 13 and 23.

  And the surface 14a, 24a; 15a, 25a by the side of the bottom walls 13b and 23b of the said recessed parts 13 and 23 in the said hole parts 14 and 24 and the said bar members 15 and 25, and the said bar members 15 and 25 are said hole parts 14 , 24 are tapered surfaces that contact each other.

  In that case, the tapered surfaces 14a, 24a of the holes 14, 24 are constituted by the main bodies 11e, 21e of the dedicated members 11, 21 and separate members 11f, 21f.

  Further, when the rod members 15 and 25 enter the holes 14 and 24, the surfaces 14b and 24b opposite to the tapered surfaces 14a and 24a of the holes 14 and 24, and the rod members 15 and 25 A gap S is formed between the tapered surfaces 15a and 25a and the opposite surfaces 15b and 25b.

  As a procedure for attaching the cores 11 and 21 to the holders 12 and 22, the rod members 15 and 25 are retracted into the side walls 13 a and 23 a, and the cores 11 and 21 are fitted into the recesses 13 and 23. The cores 11 and 21 are moved to a predetermined position before contacting the bottom walls 13b and 23b of the recesses 13 and 23, and the rod members 15 and 25 are advanced into the recesses 13 and 23, respectively. The cores 11, 21 are inserted into the holes 14, 24, and the cores 11, 21 are connected to the recesses 13, 25 through the mutual contact of the taper surfaces 14 a, 24 a; 23 is moved to the bottom walls 13b, 23b side and brought into contact with the bottom walls 13b, 23b.

  In this way, when the fixed mold 10 and the movable mold 20 are divided into the cores 11 and 21 having the cavity forming surfaces 11a and 21a and the holders 12 and 22 having no cavity forming surfaces, The bar member 15 is movable to the side walls 13a, 23a of the recesses 13, 23 provided in the position 22 so as to be advanced into the recesses 13, 23 from the side walls 13a, 23a and retracted into the side walls 13a, 23a. , 25 are provided, and the rod members 15, 25 enter the holes 14, 24 provided in the lateral walls 11b, 21b of the cores 11, 21, so that the cores 11, 21 are removed from the recesses 13, 23. As a result, the cores 11 and 21 are detachably held by the holders 12 and 22.

  In that case, surfaces 14a and 24a on the bottom walls 13b and 23b side of the recesses 13 and 23 in the holes 14 and 24, and surfaces 15a and 25a on the bottom walls 13b and 23b side of the recesses 13 and 23 in the rod members 15 and 25, respectively. Are tapered surfaces, and when the bar members 15 and 25 enter the holes 14 and 24, the taper surfaces 14a and 24a; 15a and 25a are in contact with each other, so that the bar members 15 and 25 advance. The cores 11 and 21 are moved toward the bottom walls 13b and 23b of the recesses 13 and 23 through the tapered surfaces 14a and 24a; 15a and 25a, and the cores 11 and 21 are firmly held by the holders 12 and 22. The Rukoto.

  Since the moving direction B of the bar members 15 and 25 and the contact / separation direction A of the fixed mold 10 and the movable mold 20 do not coincide with each other, the separation generated between the fixed mold 10 and the movable mold 20 when the mold is opened. The force does not directly act in the moving direction B of the bar members 15 and 25, but only a part of the separation force acts on the retreating side of the bar members 15 and 25 through the tapered surfaces 14a and 24a; 15a and 25a. Just do it. Therefore, by simply pressing the bar members 15 and 25 toward the advancing side with a relatively small force, the separation force at the time of mold opening can be sufficiently counteracted, and the cores 11 and 21 can be stably held by the holders 12 and 22. It becomes possible.

  In that case, since the taper surfaces 14a and 24a of the holes 14 and 24 are constituted by the main bodies 11e and 21e of the cores 11 and 21 and the separate members 11f and 21f, the taper surfaces 14a and 24a; When repairing the tapered surfaces 14a and 24a of the hole portions 14 and 24 worn by friction, it becomes unnecessary to replace the entire cores 11 and 21, thereby facilitating work and reducing costs.

  Further, a gap S is formed between the surfaces 14b, 24b opposite to the tapered surfaces 14a, 24a of the holes 14, 24 and the surfaces 15b, 25b opposite to the tapered surfaces 15a, 25a of the rod members 15, 25. Therefore, the friction when the rod members 15 and 25 enter the holes 14 and 24 is reduced, and the rod members 15 and 25 can be inserted into the holes 14 and 24 with a relatively small force. Wear at the time of entry of the rod members 15 and 25 into the holes 14 and 24 is reduced, and the repair frequency of the rod members 15 and 25 and the holes 14 and 24 is reduced.

  Further, while the cores 11 and 21 are being moved toward the bottom walls 13b and 23b of the recesses 13 and 23 via the tapered surfaces 14a and 24a; 15a and 25a, the holes 14 and 24 and the rod member 15 are moved. , 25 on opposite sides 14b, 24b; 15b, 25b are in contact with each other, and the core members 11, 21 are not yet in contact with the bottom walls 13b, 23b of the recesses 13, 23, but the rod members 15, 25 The problem that the advancement of is prevented is avoided.

  Then, at the stage where the cores 11 and 21 are moved to a predetermined position before contacting the bottom walls 13b and 23b of the recesses 13 and 23, the rod members 15 and 25 are inserted into the holes 14 and 24, Since the cores 11 and 21 are moved toward the bottom walls 13b and 23b of the recesses 13 and 23 through the mutual contact of the tapered surfaces 14a and 24a; 15a and 25a, they are brought into contact with the bottom walls 13b and 23b. The cores 11 and 21 do not strike the bottom walls 13b and 23b of the recesses 13 and 23 vigorously, so that deformation or damage of the cores 11 and 21 and the holders 12 and 22 at the time of changeover can be avoided. . In particular, an advantageous effect can be obtained when the weights of the cores 11 and 21 and the weights of the fixed mold 10 and the movable mold 20 are relatively large.

  In addition, the moving direction B of the rod members 15 and 25 is not limited to the vertical direction, and may be a horizontal direction. The coupling mechanism 40 of the coupling unit U may have another configuration.

  As described above in detail with specific examples, the present invention can sufficiently counter the separation force when the mold is opened with a relatively small force when the fixed mold and the movable mold are divided into the dedicated member and the general-purpose member. As described above, since the dedicated member can be detachably held on the general-purpose member, a wide range of industrial applicability is expected in the technical field of improvement of changeover accompanied with mold replacement.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which illustrates schematically arrangement | positioning of the main component of the die-casting machine which concerns on the best embodiment of this invention from a side surface, Comprising: (a) shows a mold open state, (b) shows a mold clamping state. It is shown. FIG. 6 is a cross-sectional view schematically illustrating the core replacement operation when changing the die casting machine, more specifically, the mounting operation to the holder in the order of (a), (b), and (c). It is a side view which shows the step which a coupling unit is moved toward a fixed type holder at the time of the change of the die-casting machine. It is a side view which shows the step by which the said coupling unit was fitted to the recessed part of the fixed-type holder to the predetermined position. It is the schematic seen from the arrow v direction of FIG. It is a side view which shows the step which the fitting to the recessed part of the core on the stationary mold side was completed. It is a side view which shows the step by which the said coupling unit was fitted to the recessed part of the movable holder to the predetermined position. It is a side view which shows the step which the fitting to the recessed part of the core on the movable type | mold side was completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Die-casting machine 10 Fixed type | mold 20 Movable type | molds 11 and 21 Dedicated member 11a, 21a Cavity formation surface 11b, 21b Dedicated member lateral wall 12, 22 General-purpose member 13, 23 Recessed part 13a, 23a Recessed side wall 13b, 23b Recessed bottom wall 14,24 Hole Portion 14a, 24a Hole tapered surface 15, 25 Bar member 15a, 25a Bar member taper surface A Contact / separation direction B Bar member moving direction

Claims (4)

The fixed mold and the movable mold include a dedicated member having a cavity forming surface and a general-purpose member having no cavity forming surface, and the dedicated member is a fixed mold and a movable mold with respect to a recess provided in the general-purpose member. A mold for removably fitting in the direction of contact and separation,
When the dedicated member is fitted into the recess, a hole is provided in the side wall of the dedicated member that contacts the side wall of the recess,
The hole can be moved to the side wall of the concave portion from the side wall into a state in which it has advanced into the concave portion and in a state in which it has been retracted into the side wall. A bar member that rushes into the part is provided,
The molding die, wherein the hole and the surface of the bar member on the bottom wall side of the recess are tapered surfaces that come into contact with each other when the bar member enters the hole. In the molding die according to claim 1,
The mold for molding, wherein the tapered surface of the hole is formed of a member separate from the main body of the dedicated member. In the molding die according to claim 1,
When the rod member enters the hole, a gap is formed between the surface opposite to the tapered surface of the hole and the surface opposite to the tapered surface of the rod member. Mold for molding characterized by being made. The fixed mold and the movable mold include a dedicated member having a cavity forming surface and a general-purpose member having no cavity forming surface, and the dedicated member is a fixed mold and a movable mold with respect to a recess provided in the general-purpose member. A method of fixing a molding die that is detachably fitted in the direction of contact and separation,
When the dedicated member is fitted into the recess, a hole is provided in the side wall of the dedicated member that contacts the side wall of the recess,
The hole can be moved to the side wall of the concave portion from the side wall into a state of being advanced into the concave portion and a state of being retracted into the side wall, and the special member is advanced into the concave portion when the hole is advanced. A bar member that rushes into the part is provided,
Using a molding die in which the hole and the surface on the bottom wall side of the recess in the bar member are tapered surfaces that come into contact with each other when the bar member enters the hole,
Retracting the bar member into the side wall;
Fitting the dedicated member into the recess,
Moving the dedicated member to a predetermined position before contacting the bottom wall of the recess;
The rod member is advanced into the recess to enter the hole,
A method for fixing a molding die, wherein the dedicated member is moved to the bottom wall side of the recess and brought into contact with the bottom wall through mutual contact between the bar member and the tapered surface of the hole portion. .

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