JP5436291B2 - Injection mold equipment - Google Patents

Description

  In the present invention, a fixed mold, a movable mold that moves in a horizontal direction so that the mold can be clamped and separated from the fixed mold, and a transfer sheet provided with a transfer foil are wound and disposed at an upper portion of the movable mold. A supply roller, a drive roller disposed in a lower part of the movable mold, and a transfer sheet after transfer so as to feed the transfer sheet from the supply roller between the fixed mold and the movable mold The present invention relates to an injection mold apparatus including a winding roller.

As a method for applying a pattern to an injection molded product, so-called in-mold transfer is well known. In this method, a transfer sheet provided with a transferable pattern print layer is fed between a fixed mold and a movable mold, and the pattern is transferred to a molded product simultaneously with injection molding.
In a general injection mold apparatus that performs in-mold transfer, a winding roller is disposed in a lower space of a fixed mold or a movable mold, and a predetermined amount of the transfer sheet is wound around the winding roller. Then, the operator replaces the winding roller with another unrolled winding roller (see Patent Document 1).

Japanese Patent Laying-Open No. 2005-53154 (see 13 in FIG. 3)

Since the installation height of the fixed mold and the movable mold in the injection mold apparatus is set to a predetermined height at which an operator can easily work, there is a limit to the width of the lower space that can be secured.
In particular, in a large injection mold apparatus or the like, it is difficult to secure a wide lower space, and thus it is not possible to wind up so much transfer sheet on the winding roller.
Therefore, the operator has to frequently replace the winding roller and is forced to replace the winding roller in such a narrow space, so there is room for improvement in terms of improving workability. .
Accordingly, an object of the present invention is to reduce the frequency of replacing the take-up roller in an injection mold apparatus that performs in-mold transfer, and to facilitate the replacement operation.

  A first characteristic configuration according to the present invention includes: a fixed mold; a movable mold that moves in a horizontal direction so that the mold can be clamped and separated from the fixed mold; and a transfer sheet that includes a transfer foil is wound around the movable mold. A supply roller disposed in an upper portion of the movable die, a drive roller disposed in a lower portion of the movable die so as to feed a transfer sheet from the supply roller between the fixed die and the movable die, and the drive A winding direction changing mechanism for changing the feeding direction of the transfer sheet after the transfer is provided on the downstream side of the roller, and after the transfer to the winding roller provided outside the movable mold and the fixed mold in a plan view. The transfer sheet can be wound up.

[Action and effect]
According to this configuration, since the winding roller is provided outside the fixed type and the movable type, the space surrounding the winding roller is not limited, unlike the case where the winding roller is provided in the lower space of the fixed type and the movable type. As a result, a large number of transfer sheets can be taken up by the take-up roller, so that the replacement frequency is reduced, and the operator can perform the work of replacing the take-up roller in a wider space.

  According to a second characteristic configuration of the present invention, the winding direction changing mechanism draws the transfer sheet that has passed through the driving roller to the lower side of the fixed mold, and turns again to the movable mold side; and And a second direction roller having a rotation axis center direction inclined in a horizontal plane with respect to the moving direction of the movable mold so as to send the transfer sheet that has passed through the first direction roller to the take-up roller. It is in.

[Action and effect]
According to this configuration, since the winding direction changing mechanism has a simple configuration including the first turning roller and the second turning roller, for example, the first turning roller and the second turning roller are fixed and It can also be arranged in a movable lower space. Therefore, the entire apparatus can be made compact.

  A third characteristic configuration according to the present invention is that the tilt angle of the rotation axis of the second turning roller can be adjusted with respect to the moving direction of the movable type.

[Action and effect]
According to this configuration, the transfer sheet S is finely adjusted when the transfer sheet S is sent from the second turning roller to the take-up roller to eliminate the lateral deviation of the transfer sheet with respect to the second turning roller. Can do.

  According to a fourth characteristic configuration of the present invention, the winding roller has two flange portions at both end portions and at least three struts spanned in parallel between the flange portions. At least one of the two ends is configured to be detachable from the flange portion.

[Action and effect]
According to this structure, the removal operation | movement of the transfer sheet wound up by roll shape becomes easy by removing one support | pillar.

It is a perspective view of the metal mold apparatus for injection molding. It is a top view of the mold apparatus for injection molding. It is a top view which shows the positional relationship of a 1st turning roller, a 2nd turning roller, and a winding roller. It is a vertical side view of the mold apparatus for injection molding when a metal mold | die is in the open state before injection molding. It is a vertical side view of the mold apparatus for injection molding when a metal mold | die is in a clamping state. It is a vertical side view of the mold apparatus for injection molding when a metal mold | die is in the open state after injection molding. It is a perspective view of a winding roller. It is a principal part enlarged view of a winding roller. It is a perspective view which concerns on another embodiment of a winding roller.

Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Injection mold equipment)
As shown in FIG. 1, an injection mold apparatus 1 according to the present invention includes a fixed mold 2 and a movable mold 5 that constitute a mold, and a transfer sheet S provided with a transfer foil. A supply roller 7 disposed at an upper part, a drive roller 8 disposed at a lower part of the movable mold 5 so as to feed the transfer sheet S between the fixed mold 2 and the movable mold 5 from the supply roller 7, after transfer A winding direction changing mechanism 10 that changes the feeding direction of the transfer sheet S, and a winding roller 11 that winds up the transferred transfer sheet S.

  The movable mold 5 has a concave portion 6 for forming a cavity space, and moves in a horizontal direction so that the mold can be clamped and separated from the fixed mold 2. The fixed die 2 has a convex portion 3 for forming a cavity space, and the convex portion 3 of the fixed die 2 and the concave portion 6 of the movable die 5 are arranged so as to face each other.

  The drive roller 8 is horizontally arranged such that its axis X1 is along the front-rear direction of the apparatus 1 (the vertical direction in FIG. 2), and is movable so as to be rotatable around the axis X1 by a drive mechanism (not shown). 5 is installed in the lower part. A first presser roller 16 is provided immediately above the drive roller 8, and is configured to sandwich the transferred transfer sheet S together with the drive roller 8.

  The injection mold apparatus 1 is provided with a first safety door and a second safety door (not shown) on the front side and the back side of the fixed mold 2 and the movable mold 5, respectively. When the first safety door or the second safety door is opened, the operation of the injection mold apparatus 1 is automatically stopped.

  As shown in FIGS. 1 and 2, the take-up roller 11 is supported by the support device 14 so as to be rotatable around its axis X2 by a drive mechanism (not shown). It is arranged laterally outward.

(Winding direction change mechanism)
As shown in FIG. 1, the winding direction changing mechanism 10 includes a first turning roller 20 disposed in a lower space on the fixed mold 2 side and a second turning disposed on a lower space on the movable mold 5 side. And a roller 21.
As shown in FIGS. 1 and 2, the first turning roller 20 is horizontally arranged such that its axis X3 is along the front-rear direction of the apparatus 1 (up and down direction in FIG. 2). The first turning roller 20 is configured to pull out the transfer sheet S that has passed through the driving roller 8 to below the fixed die 2 and send it again to the second turning roller 21 on the movable die 5 side. A second pressing roller 17 is provided immediately above the first turning roller 20, and is configured to sandwich the transferred transfer sheet S together with the first turning roller 20.

  As shown in FIG. 2, the second turning roller 21 is supported by the support frame base 22 so as to be rotatable around the rotation axis X 4, and winds the transfer sheet S that has passed through the first turning roller 20. In order to send it to the roller 11, the rotational axis direction (X 4) is inclined in the horizontal plane with respect to the moving direction of the movable mold 5.

  Specifically, as shown in FIG. 3, the line passing through the longitudinal center of each of the first turning roller 20 and the second turning roller 21 is a straight line L1, and the rotation of the second turning roller 21 with respect to the straight line L1. When the inclination angle α is in the axial direction (X4), the inclination angle α is set to about 45 degrees. As a result, the transfer sheet S that has passed through the second turning roller 21 is sent in a direction perpendicular to the straight line L1 (in the straight line L2 direction). The straight line L1 coincides with the moving direction of the movable mold 5 in plan view.

  However, the lateral deviation of the transfer sheet S with respect to the second turning roller 21 may occur due to the change in the tension of the transfer sheet S, the rotational resistance of the second turning roller 21, and the like. It is more preferable that α can be adjusted in an angle range of 45 ° ± 5 °. This finely adjusts the tension applied to the transfer sheet S when the transfer sheet S is sent from the second direction roller 21 in a right angle direction, thereby eliminating the lateral displacement of the transfer sheet S with respect to the second direction roller 21. Can do.

  The winding roller 11 and the relay device 23 are arranged on a straight line L2 in which the longitudinal centers of the winding roller 11 and the relay device 23 are orthogonal to the straight line L1 in plan view at the longitudinal center of the second turning roller 21. It arrange | positions so that it may be located in.

(Preparation of transfer sheet)
As shown in FIGS. 1 and 4, in the open state in which the movable die 5 is separated from the fixed die 2, the transfer sheet S of the supply roller 7 is arranged between the fixed die 2 and the movable die 5, and the drive roller 8 and the first presser roller 16. Next, after pulling out from the bottom of the driving roller 8 toward the fixed die 2 and passing between the first turning roller 20 and the second pressing roller 17, the movable die 5 is moved from under the first turning roller 20. Pull out to the second turning roller 21 arranged on the side. Finally, the transfer sheet S hung on the second turning roller 21 is pulled out from under the second turning roller 21, passed through the two columns 23a, 23a of the relay device 23, and then wound up. Wind around the roller 11.

(Operation during injection molding)
After the transfer sheet S is set as described above, the drive roller 8 and the take-up roller 11 are driven to rotate, and the transfer sheet S provided with the transfer foil is moved between the supply roller 7 and the fixed die 2 and the movable die 5. To send.

  Next, as shown in FIG. 5, after the rotational driving of the driving roller 8 and the winding roller 11 (not shown) is stopped, the movable die 5 is brought close to the fixed die 2 and clamped. In the state where the mold is clamped, the transfer sheet S is slackened between the driving roller 8 and the first turning roller 20.

  When the fixed mold 2 and the movable mold 5 are clamped, a cavity space 15 is formed by the convex portion 3 of the fixed mold 2 and the concave portion 6 of the movable mold 5. Molten resin C is injected into the cavity space 15 from the gate 4 of the fixed mold 2. The molten resin C is solidified inside the cavity space 15 to form a predetermined molded product, and the transfer foil of the transfer sheet S is transferred to the surface of the molded product.

  As shown in FIG. 6, after the resin is cured, the movable mold 5 is separated from the fixed mold 2, and the molded product P is taken out by an unillustrated push bar provided on the fixed mold 2 or the movable mold 5. At this time, the looseness of the transfer sheet S from the driving roller 8 to the first direction roller 20 is eliminated.

  The drive roller 8 and the take-up roller 11 are driven to rotate again, and the transfer sheet S provided with the transfer foil is fed between the fixed mold 2 and the movable mold 5 and injection molding is performed in the same manner as described above.

Next, the transfer operation of the transfer sheet S during injection molding will be described.
In the present embodiment, winding of the transfer sheet S by the winding roller 11 is performed only when the movable mold 5 and the fixed mold 2 are in the open state. Thereby, the position shift of the transfer foil at the time of shaping | molding can be prevented.

  As shown in FIG. 1, when the transfer sheet S after the transfer passes between the drive roller 8 and the first pressing roller 16, it is folded back by the first pressing roller 16 and fixed toward the fixed mold 2 side. 2 is sent between the first diverting roller 20 and the second presser roller 17 that are installed below 2.

  Next, the transfer sheet S is folded back by the first turning roller 20 and sent to the second turning roller 21 installed on the movable mold 5 side.

  As shown in FIGS. 2 and 3, for example, when the tilt angle α of the rotation axis of the second turning roller 21 is set to 45 degrees, the transfer sheet S sent to the second turning roller 21 is The two turning rollers 21 change the direction by 90 degrees and are sent to the winding roller 11 via the relay device 23.

  After the winding roller 11 has wound a predetermined amount of the transfer sheet S, the operator may replace the winding roller 11 with another winding roller 11 that has not been wound, or the winding roller 11 has been wound. The roll of the transfer sheet S may be removed and the same winding roller 11 may be attached again.

  In the present embodiment, the height of the transfer sheet S from the second turning roller 21 to the relay device 23 is kept constant by the relay device 23. Therefore, as the operation time of the apparatus becomes longer, even if the diameter of the roll of the transfer sheet S taken up by the take-up roller 11 is increased, the transfer sheet S that has passed through the second turning roller 21 is located above the roll. There is no risk of contact with the transfer sheet S positioned (the transfer sheet S before passing through the second turning roller 21), and the sheet is smoothly conveyed.

  For example, a known torque motor or a clutch mechanism is used as a drive mechanism (not shown) for driving the take-up roller 11 to rotate, so that it is more preferable to control the tension of the transfer sheet S.

As shown in FIG. 7, the winding roller 11 in the present embodiment includes, for example, two flange portions 12 at both end portions and three support columns 13 spanned in parallel between the flange portions 12. In addition, it is convenient that at least one of the both end portions of at least one of the support columns 13 is configured to be attachable / detachable or changeable in position with respect to the flange portion 12.
As shown in FIG. 8A, the bolt can be inserted through the long hole 13b of the fixing piece 13a erected on both ends of the support column 13 and the flange portion 12, and the nut can be fixed by fastening from the outside. At the same time, as shown in FIG. 8B, the radial position of the column 13 on the take-up roller 11 can be freely changed by loosening the nut.
Furthermore, as shown in FIG. 9, if the take-up roller 11 is cantilever-supported, as shown in FIG. 9, the take-up transfer sheet S can be easily taken out by simply loosening a single support column 13. Convenient.

  In addition, in this embodiment, although the winding roller 11 employ | adopts the structure provided with the three support | pillars 13, if it is set as the structure provided with at least three support | pillars 13 without being limited to this structure. good.

[Another embodiment]
You may make it comprise the axis | shaft part of the winding roller 11 in the above-mentioned embodiment with the material which expands diameter by supplying air. According to this configuration, when the transfer sheet S wound up in a roll shape is taken out from the take-up roller 11, the diameter of the shaft portion is reduced by extracting air from the shaft portion of the take-up roller 11, and the transfer sheet S roll. Since there is a gap between the winding roller 11 and the take-up roller 11, the take-out operation is facilitated.

  The present invention relates to an injection molding metal for decorating the surface of an injection molded product that is used in various fields such as automobiles, household electrical appliances, mobile phones, personal computers, etc., regardless of whether it is an interior product or an exterior product. Widely available for mold equipment.

DESCRIPTION OF SYMBOLS 1 Injection mold apparatus 2 Fixed mold | type 5 Movable type | mold 7 Supply roller 8 Drive roller 10 Winding direction change mechanism 11 Winding roller 12 Flange part 13 Support | pillar 20,21 1st and 2nd turning roller S Transfer sheet P Molding Product X1-4 Rotation axis

Claims (4)

A fixed mold, a movable mold that moves in a horizontal direction so that the mold can be clamped and separated from the fixed mold, and a supply roller on which a transfer sheet including a transfer foil is wound and disposed at an upper portion of the movable mold; A transfer roller disposed at a lower portion of the movable mold so that a transfer sheet is fed from the supply roller between the fixed mold and the movable mold; and on the downstream side of the drive roller, after the transfer Equipped with a winding direction changing mechanism for changing the transfer sheet feeding direction,
An injection mold apparatus configured to be capable of winding the transfer sheet after transfer onto a winding roller provided outside the movable mold and the fixed mold in a plan view.   The winding direction changing mechanism pulls the transfer sheet that has passed through the driving roller to the lower side of the fixed mold, and again redirects to the movable mold side, and the transfer that has passed through the first deflecting roller. The injection mold according to claim 1, further comprising: a second turning roller having a rotational axis center direction inclined in a horizontal plane with respect to a moving direction of the movable mold so as to send the sheet to the winding roller. apparatus.   The mold apparatus for injection molding according to claim 2, wherein an angle of inclination of a rotation axis of the second turning roller is adjustable with respect to a moving direction of the movable mold. The winding roller has two flange portions at both ends, and at least three struts spanned in parallel between the flange portions,
The injection mold according to any one of claims 1 to 3, wherein at least one of the support columns is configured such that at least one of both end portions thereof is detachable from the flange portion. apparatus.

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