JP2011104943A - Injection molding mold device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection molding mold device which can drop a molded product down from a projection pin while suppressing a thickness of the stationary mold side. <P>SOLUTION: The injection molding mold device 1 includes: a stationary mold 2 and a movable mold 4; projection pins 32 which are disposed on the stationary mold 2, retreat from a cavity C disposed in the stationary mold 2 in such a closed state that the stationary mold 2 and the movable mold 4 come into contact with each other and enter into cavities C and project the molded product D from the stationary mold 2 in such an opened state that the stationary mold 2 and the movable mold 4 are separated from each other; a driving member 90 which is disposed on the movable mold 4 side and is reciprocally moved; and an interlocking mechanism which interlocks the reciprocal movement of the driving member 90 with the reciprocal movement of the projection pins 32 in the opened state. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an injection mold apparatus.

  Conventionally, an injection mold apparatus for molding a molded product by injection molding is known (see Patent Document 1). Such a mold apparatus is provided with a protruding pin for protruding a molded product from a fixed mold or a movable mold. When the molded product is applied by the protruding pin, the molded product falls from the fixed mold or the movable mold and is removed.

JP-A-8-207104

  When the molded product is protruded by the protruding pin, the molded product may adhere to the protruding pin or the cavity, and the molded product may protrude and may not fall depending on the protrusion of the pin.

  In addition, when the protruding pin is provided on the fixed mold, if the driving member for driving the protruding pin is provided on the fixed mold side, the fixed mold is enlarged. Since the runner is provided in the fixed mold, the length of the runner increases when the fixed mold is enlarged, which may cause the resin to be easily cured during passage through the runner.

  Then, an object of this invention is to provide the injection mold apparatus which can drop a molded article from a protrusion pin, suppressing the thickness by the side of a fixed mold.

  The object is to retreat from a cavity provided in the fixed mold in a closed state in which the fixed mold and the movable mold are in contact with the fixed mold and the movable mold in a closed state. A projecting pin that enters the cavity and projects a molded product from the fixed mold in an open state in which the fixed mold and the movable mold are separated from each other; a drive member that is provided on the movable mold side and reciprocates; This can be achieved by an injection mold apparatus having an interlocking mechanism that interlocks the reciprocating motion of the drive member and the reciprocating motion of the protruding pin in the open state.

  Even when the molded product adheres to the protruding pin, the molded product can be dropped from the protruding pin by reciprocating the protruding pin. In addition, since the drive member is provided on the movable mold side, an increase in the size of the fixed mold can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the injection mold apparatus which can drop a molded article from a protrusion pin can be provided, suppressing the thickness by the side of a fixed mold.

Explanatory drawing of the injection molding die apparatus of the present Example in a closed state. Explanatory drawing of the injection molding die apparatus of the present Example in an open state.

  1 and 2 are explanatory views of an injection mold apparatus according to the present embodiment. FIG. 1 shows a closed state in which the fixed mold and the movable mold are closed, and FIG. 2 shows an open state in which the fixed mold and the movable mold are opened. 2 shows a state in which the position of the protruding pin is different between the upper side and the lower side of the center line along the opening / closing direction of the injection mold apparatus 1.

  Specifically, the upper side of the center line along the opening and closing direction of the injection mold apparatus 1 in FIG. 2 shows a state in which the product is protruded by the protruding pin, and the lower side shows a state before the product is protruded. Yes.

  As shown in FIGS. 1 and 2, the injection mold apparatus 1 includes a fixed mold 2 and a movable mold 4. The fixed mold 2 includes a fixed side mounting plate 10, a runner protruding plate 20, and a fixed side mold plate 30. The movable mold 4 includes a movable side mold plate 40, a receiving plate 50, a spacer block 60, and a movable side mounting plate 70. The direction on the movable mold 4 side is defined as the first direction FD and the direction on the fixed mold 2 side is defined as the second direction SD via the mating surface where the fixed mold plate 30 and the movable mold plate 40 contact. . The first direction FD and the second direction SD are opposite directions.

  Support pins 12 are fixed to the fixed side mounting plate 10 so as to penetrate therethrough. As shown in FIGS. 1 and 2, the fixed mold 2 and the movable mold 4 are provided with holes through which the support pins 12 can be inserted. In the closed state, the support pin 12 is inserted into a hole provided on the movable mold 4 side. The fixed-side mounting plate 10 is fixed to a fixed-side platen 160 provided in one injection mold apparatus with mounting bolts (not shown). The fixed-side mounting plate 10 is provided with a resin flow passage (not shown) for allowing the resin to flow into a cavity C described later.

  A limiting bolt 23 is provided between the runner protruding plate 20 and the fixed side template 30. As shown in FIG. 2, the limiting bolt 23 defines the distance between the runner protruding plate 20 and the fixed-side template 30 in the open state. A hole for allowing the limiting bolt 23 to escape is formed on the movable mold 4 side.

  As shown in FIG. 1, the fixed mold 30 is formed with a concave portion on the surface of the movable mold 4, and the concave portion is formed into a cavity by contacting the fixed mold 30 and the movable mold 40. Defined as C. The resin flows into the cavity C through a resin flow passage (not shown). As shown in FIG. 2, the molded product D is protruded from the cavity C by the protruding pin 32. Two protruding pins 32 are provided, but the number is not limited.

  A recess 31 is formed on the fixed-side template 30 on the runner protruding plate 20 side. A movable member 33 is provided in the recess 31. The movable member 33 corresponds to a second movable member. The movable member 33 is held by the fixed-side template 30 so as to be movable in the first direction FD and the second direction SD. Specifically, the movable member 33 moves between the bottom surface of the recess 31 and a stopper 37 provided in the recess 31. The proximal end side of the protruding pin 32 is fixed to the movable member 33, and moves in the first direction FD and the second direction SD as the movable member 33 moves.

  The movable member 33 is configured by overlapping a plate-like member of the movable member 33 on the fixed-side template 30 side, a plate-like member on the stopper 37 side, and two plate-like members. The protruding pin 32 penetrates the plate-like member of the movable member 33 on the fixed side mold plate 30 side, but does not penetrate the plate-like member of the movable member 33 on the stopper 37 side. The protruding pin 32 has a flange on the second direction SD side, and is fixed to the movable member 33 by sandwiching the flange portion between the two plate-like members of the movable member 33.

A fixed-side return pin 35 is disposed on the fixed-side template 30. The end in the second direction SD of the fixed-side return pin 35 has a flange shape, and the flange portion is sandwiched and fixed between the two plate-shaped members of the movable member 33, and the tip side of the fixed-side return pin 35 is fixed to the fixed-side mold plate 30. It penetrates and moves in the first direction FD and the second direction SD as the movable member 33 moves. A coiled spring 36 is inserted through the fixed return pin 35. The spring 36 is interposed between the fixed-side template 30 and the movable member 33 and biases the movable member 33 in the second direction SD. As a result of the urging force of the spring 36 urging the movable member 33 in the second direction SD, the movable member 33 comes into contact with the stopper 37 and maintains its position. The urging force of the spring 36 is weaker than the urging force of the spring 66 described later.

The movable side mold plate 40, the receiving plate 50, the spacer block 60, and the movable side mounting plate 70 are in an overlapped state in both the open state and the closed state. A tension bolt 34 is provided between the fixed side template 30 and the movable side template 40. As shown in FIG. 2, the movable side mold plate 40 moves to the FD side and is pulled by the tension bolt 34, so that the fixed side mold plate 30 moves in the first direction FD. The receiving plate 50, the spacer block 60, and the movable mounting plate 70 are formed with holes for allowing the tension bolts 34 to escape.
The movable side mounting plate 70 is fixed to the movable side platen 170 of the injection mold apparatus 1 by mounting bolts (not shown), and the movable side platen 170 is moved in the first direction FD as the movable side platen 170 moves in the first direction FD. The plate 40, the receiving plate 50, the spacer block 60, and the movable side mounting plate 70 are moved together with the movable side platen 170.

  The spacer block 60 defines a space S between the receiving plate 50 and the movable side mounting plate 70. The movable members 63a and 63b are arranged so as to be movable within a predetermined range in the first direction FD and the second direction SD within S. The movable members 63a and 63b have substantially the same shape and a plate shape. The movable members 63a and 63b correspond to first movable members. The movable return pin 65 passes through the movable member 63a, but does not penetrate the movable member 63b. A flange is formed at the end of the movable-side return pin 65 in the first direction FD, although not indicated by a reference numeral, and this flange is sandwiched between the movable members 63a and 63b. The movable return pin 65 passes through the receiving plate 50 and the movable mold plate 40. A spring 66 is inserted through the movable return pin 65. The spring 66 is interposed between the movable member 63 a and the movable side template 40. The spring 66 urges the movable members 63 a and 63 b in the first direction FD, and the movable member 63 b is in contact with the movable side mounting plate 70. In the hole formed in the receiving plate 50, the movable return pin 65 penetrates and the spring 66 is accommodated. By making the hole of the receiving plate 50 large enough to accommodate the spring 66, the length of the spring 66 can be secured. Thereby, the spring 66 with large urging | biasing force is employable.

    The biasing force of the spring 66 is set to be larger than the biasing force of the spring 36 in the state shown on the upper side of the center line along the opening / closing direction of the injection mold apparatus 1 in FIG. In other words, the spring 36 is in the most compressed state in this state, and the urging force in the second direction SD applied to the movable member 33 is maximized, but the spring 66 is more than the urging force by the spring 36 at this time. The biasing force in the first direction FD applied to the movable members 63a and 63b is set to be larger.

  An interlocking pin 80 is provided between the fixed mold 2 and the movable mold 4. The interlocking pin 80 passes through the movable members 63 a and 63 b, the receiving plate 50, the movable side template 40, the fixed side template 30, and the movable member 33. The interlocking pin 80 has a flange 82 at the end on the movable mold 4 side and a flange 84 at the end on the fixed mold 2 side. Further, the runner protruding plate 20 and the fixed-side mounting plate 10 are formed with holes for releasing the interlocking pins 80 in the closed state, and the holes are larger than the diameter of the flange 84. A hole for allowing the interlocking pin 80 to escape is formed in the movable mounting plate 70, and this hole is larger than the diameter of the flange 82. As shown in FIG. 2, in the open state, the flange 82 contacts the movable member 63 b and the flange 84 contacts the movable member 33.

  When the flange 82 and the movable member 63b come into contact with each other, the relative movement of the movable members 63a and 63b with respect to the interlock pin 80 in the first direction FD is restricted. When the flange 84 and the movable member 33 come into contact with each other, the relative movement of the movable member 33 in the second direction SD with respect to the interlocking pin 80 is restricted.

  A drive member 90 that presses the movable members 63a and 63b is provided on the movable mold 4 side. A hole for allowing the drive member 90 to escape is formed in the movable side mounting plate 70. The drive member 90 is connected to a hydraulic cylinder or an air cylinder (not shown) and reciprocates in a first range FD and a second direction SD within a predetermined range.

Next, the operation of the injection mold apparatus 1 from the closed state to the open state will be described.
When the resin is filled in the cavity C in the closed state of FIG. 1 and the resin is cured, first, the movable mold 4 moves in the first direction FD. A spring 150 is inserted into the limiting bolt 23, and the movable die 4 and the fixed-side template 30 are moved in the first direction FD by the biasing force of the spring, and the runner protruding plate 20 and the fixed-side die are moved. A space 100 shown in FIG. 2 is formed by being separated from the plate 30.

  As the movable mold 4 moves in the first direction FD, the biasing force of the spring 150 is weakened, and the fixed-side mold plate 30 eventually stops moving in the first direction FD, but the movable mold 4 moves in the first direction FD. Therefore, the movable side template 40 and the fixed side template 30 are separated from each other, and the space 200 shown in FIG. 2 is formed.

  When the movable mold 4 is further moved in the first direction FD, the flange portion provided at the end of the tension bolt 34 on the first direction FD side and the movable mold plate 40 come into contact with each other, and the tension bolt 34 is moved to the movable mold 4. At the same time, it moves to the first direction FD side. Eventually, the flange portion provided at the end in the second direction SD of the tension bolt 34 comes into contact with the fixed side mold plate 30, and the fixed side mold plate 30 moves again together with the working mold 4 in the first direction FD.

  When the stationary side template 30 continues to move in the first direction FD, the flange portion provided on the first direction FD end side of the limiting bolt 23 and the stationary side template 30 come into contact with each other. Starts to move toward the first direction FD.

  Although the movable mold 4 continues to move in the first direction FD, the flange portion provided on the end side in the second direction SD of the limiting bolt 23 and the runner protruding plate 20 come into contact with each other.

  When the movable mold 4 further moves in the first direction FD in this state, the entire fixed side mold plate 30 protrudes from the runner 20 and moves away from the plate 20 and moves in the first direction FD. Since the movable side template 40 and the fixed side template 30 are connected via the tension bolts 34, the movable side template 40 is interlocked with the movable side template 40 when the movable side template 40 moves in the first direction FD over a predetermined range. Thus, the fixed-side template 30 also moves in the first direction FD. Thereby, the fixed side template 30 is separated from the runner protruding plate 20 with a predetermined interval. In this way, the injection mold apparatus 1 is opened.

  The operation of the interlock pin 80 in the process in which the injection mold apparatus 1 operates from the closed state to the open state will be described. When the movable mold 4 moves in the first direction FD, the flange 82 comes into contact with the movable member 63b, and the interlocking pin 80 moves in the first direction FD together with the movable mold 4 while maintaining the contact state.

  The distance that the movable mold 4 moves with respect to the runner protruding plate 20 is the distance D1 between the movable mold plate 40 and the fixed mold plate 30 in the open state, the fixed mold plate 30 and the runner protruding as shown in FIG. The total distance D2 with the plate 20 is the distance. In the closed state, a play amount is set for the interlocking pin 80. As shown in FIG. 1, the play amount of the interlocking pin corresponds to the total distance of the distance d1 between the flange 82 and the movable member 63b and the distance d2 between the flange 84 and the movable member 33. Here, if the total amount of play d1 and d2 of the interlocking pin 80 shown in FIG. 1 is larger than the total distance of D1 and D2, the interlocking pin 80 moves to the first direction FD side together with the movable mold 4. However, the second direction SD end side flange 84 of the interlocking pin 80 does not contact the movable member 33.

  However, in this embodiment, the total distance of the play amounts d1 and d2 is set shorter than the total distance of D1 and D2. Therefore, as the movable mold 4 moves in the first direction FD, the second direction SD end side flange 84 of the interlocking pin 80 eventually comes into contact with the movable member 33. The total distance of the play amounts d1 and d2 is the movable metal from the closed state shown in FIG. 1 to the state when the flanges 82 and 84 of the interlocking pin 80 are in contact with the movable members 63b and 33, respectively. This corresponds to the moving distance of the mold 4. Also, the total distance of the distances D1 and D2 is that the flanges 82 and 84 are in contact with the movable members 63b and 33, respectively, and the movable member 33 is pushed in the first direction FD by the flange 84 from the closed state shown in FIG. This corresponds to the moving distance of the movable mold 4 until the protruding pin 32 enters the cavity C and reaches the open state.

  Before the flange 84 comes into contact with the movable member 33, as shown in FIG. 1, the movable member 33 is in contact with the stopper 37 by the urging force in the second direction SD given by the spring 36, and the protruding pin 32. Is retracted from the cavity C.

  If the flange 84 further moves in the first direction FD while maintaining the state where the flange 84 is in contact with the movable member 33, in the present embodiment, the biasing force in the second direction SD by the spring 36 applied to the movable member 33 is larger. Since the biasing force in the first direction FD by the spring 66 applied to the movable member 63b is set to be larger, the movable member 33 moves in the first direction FD while antagonizing the biasing force of the spring 36. As shown in the upper side of FIG. 2, the movable member 33 moves in the first direction FD.

  Since the protruding pin 32 is fixed to the movable member 33, the protruding pin 32 moves together with the movable member 33 in the first direction FD and enters the cavity C. Thereby, the molded product D protrudes and protrudes to the pin 32.

Next, the reciprocating operation of the protruding pin 32 will be described.
2, when the driving member 90 presses the movable member 63b in the second direction SD in the open state, the movable members 63a and 63b antagonize the urging force of the spring 66 and move in the second direction SD. Moving. As the movable member 63b moves in the second direction SD, the urging force in the first direction FD by the spring 66 via the interlocking pin 80 does not act on the movable member 33. Therefore, the movable member 33 moves in the second direction SD together with the interlocking pin 80 according to the urging force of the spring 36. In this way, the interlocking pin 80, the movable member 33, and the movable members 63a and 63b move so as to follow the movement in the second direction SD by the drive member 90. Thereby, as shown in the lower side of FIG. 2, the movable member 33 abuts against the stopper 37, for example, and the protruding pin 32 moves in the second direction SD together with the movable member 33.

  Further, when the driving member 90 is moved in the first direction FD from the state shown in the lower side of FIG. 2 and retracted from the movable member 63b, the interlocking pin 80 is moved by the urging force of the spring 66 so that the movable member 63a, It moves in the first direction FD together with 63b and 33. Thus, the interlocking pin 80, the movable members 63a and 63b, and the movable member 33 follow the movement of the drive member 90 in the first direction FD. Thereby, as shown in the upper side of FIG. 2, the projecting pin 32 projects the molded product D again. As described above, the biasing force of the spring 66 is larger than the biasing force of the spring 36. Therefore, when the drive member 90 is retracted from the movable member 63b, the biasing force of the spring 66 is antagonized with the biasing force of the spring 36. Accordingly, the movable members 63a and 63b move in the first direction FD. Thus, the interlocking pin 80, the movable members 63a and 63b, the spring 66, the movable member 33, and the spring 36 correspond to an interlocking mechanism that interlocks the reciprocating motion of the drive member 90 and the reciprocating motion of the pin 32 in the open state. .

  As described above, when the movable members 63a and 63b are reciprocated by the driving member 90, the flange 82 reciprocates, and the protrusion 32 protrudes and reciprocates accordingly. Therefore, even when the molded product D adheres to the tip of the protruding pin 32 or the cavity C, the molded product D can be dropped from the protruding pin 32 by reciprocating the protruding pin 32.

  The drive member 90 is provided on the movable mold 4 side. This prevents the fixed mold 2 side from becoming large. Therefore, the runner provided on the fixed mold side can be prevented from becoming long. Thereby, it can prevent the disadvantage which originates in the runner passage period of resin becoming long resulting from a runner becoming long. In addition, an increase in cost due to an increase in size of the fixed mold side can be suppressed.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and modifications and changes can be made within the scope of the gist of the present invention described in the claims. Is possible.

DESCRIPTION OF SYMBOLS 1 Injection mold apparatus 2 Fixed mold 4 Movable mold 10 Fixed side mounting plate 11 Runner 12 Support pin 20 Runner protrusion plate 23 Limit bolt 30 Fixed side mold plate 31 Recess 32 Extrusion pin 33, 63a, 63b Movable member 34 Tension Bolt 35 Fixed return pin 36, 66 Spring 37 Stopper 40 Movable side plate 50 Receiving plate 60 Spacer block 65 Movable side return pin 70 Movable side mounting plate 80 Interlocking pin 82, 84 Flange 90 Drive member 160 Fixed side platen 170 Movable side Platen C Cavity D Molded product FD First direction SD Second direction

Claims (5)

A fixed mold and a movable mold;
In the closed state, which is provided in the fixed mold and the fixed mold and the movable mold are in contact and closed, the fixed mold and the movable mold are separated from each other by retreating from the cavity provided in the fixed mold. In an open state, a protruding pin that enters the cavity and protrudes the molded product from the fixed mold,
A drive member provided on the movable mold side and reciprocating;
An injection mold apparatus comprising: an interlocking mechanism that interlocks the reciprocating motion of the drive member and the reciprocating motion of the protruding pin in the open state. The interlocking mechanism is
A first flange provided on the fixed mold side, a second flange provided on the movable mold side, and an interlocking pin provided between the fixed mold and the movable mold;
The movable member is held by the movable mold so as to be movable by the reciprocating motion of the driving member, the interlocking pin penetrates, and in the open state, the contact with the first flange causes relative movement in the first direction with respect to the interlocking pin. A first movable member to be regulated;
A first biasing member that biases the first movable member in the first direction;
The fixed mold is movably held, holds the protruding pin, the interlocking pin penetrates, and contacts the second flange in the open state, which is opposite to the first direction with respect to the interlocking pin. A second movable member whose relative movement in the second direction is restricted;
The injection mold apparatus according to claim 1, further comprising: a second urging member that urges the second movable member in the second direction and has a urging force weaker than that of the first urging member.   When the first movable member is pushed in the second direction by the driving member in antagonism with the urging force of the first urging member, the interlocking pin is moved in accordance with the urging force of the second urging member. The injection mold apparatus of Claim 2 which moves to a said 2nd direction with 2 movable members.   When the drive member is retracted from the first movable member from a state in which the first movable member is pushed in the second direction by the drive member, the interlocking pin follows the biasing force of the first biasing member. The injection mold apparatus of Claim 3 which moves to the said 1st direction with a said 2nd movable member. In the closed state, the first and second flanges are separated from the first and second movable members, respectively.
The moving distance of the movable mold from the closed state to the state when the first and second flanges contact the first and second movable members, respectively,
From the closed state, the first and second flanges come into contact with the first and second movable members, respectively, and the second movable member is pushed in the first direction by the second flange, so that the protruding pin is in the cavity. The injection mold apparatus according to any one of claims 2 to 4, which is shorter than a moving distance of the movable mold until the open state is entered.

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