JP2006281704A - Ejection method of molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always eject a molded product in a stable state so as not to take much equipment cost when the molded product molded using a mold is ejected. <P>SOLUTION: A grasping member 3 is provided on the side opposite to a vacuum drawing direction in the vicinity of a first mold 1 so as to eject the molded product W in a stable state when the molded product W is molded by vacuum forming using the first mold 1 and a plurality of projections 2 are provided to the non-product shape part 1b of the first mold 1. When the molded product W is molded, a protruded ejection part Wt is formed to the molded product W by the projections 2 and, when the molded product W is ejected, the ejection part Wt is grasped by the grasping member 3 to eject the molded product W. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for taking out a thin-walled resin molded product such as an instrument panel from a mold after it is molded by a vacuum mold.

Conventionally, as a technique for taking out a thin resin molded product molded by, for example, vacuum molding, a gripping means for clamping the periphery of the molded product is provided on a frame ram that can be raised and lowered between first and second molding dies. 2 After the mold is clamped and the molded product is molded, when the second mold is raised and the mold is opened, the frame ram is raised at a speed slower than the rising speed of the second mold so that the molded product is 2. A technique (see Patent Document 1) that allows the mold to be detached from the mold, and a take-out technique that uses a suction cup or the like as shown in FIG. 4 are known.
Japanese Patent No. 2664762

Here, the take-out technique shown in FIG. 4 will be described. A resin sheet material W whose periphery is held by a gripping frame between the first mold 51 and the second mold 52 as shown in FIG. As shown in (b), the first mold 51 is raised to bring the resin sheet material W into contact with the mold surface, and at the same time, the second mold 52 is pressed from above, The resin sheet material W is molded into a desired shape by evacuating the mold 1 side.
Next, when lowering the first mold 51 and releasing the mold, the intermediate part of the molded product W bends downward and the mold release is unstable just by gripping with the grip frame 53 that holds the periphery of the molded product W. Therefore, when the first molding die 51 is detached by adsorbing and holding the abutting portion t and the like of the intermediate portion of the second molding die 52 with a suction cup or the like, as shown in FIG. The product take-out device 54 is inserted into the product take-out device, the suction holding of the contact portion t is released, and the molded product W is placed on the product take-out device 54 and taken out.

  However, in the case of the technique of Patent Document 1, there is a problem that the structure of the molding apparatus, the mold raising control, etc. are complicated and the equipment cost is high, and in the case of the technique shown in FIG. Since W is thin, the suction holding is unstable, the intermediate portion is easily bent, and the molded product W cannot be taken out in a stable state.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it possible to take out a molded product in a stable state with a simple configuration without incurring equipment costs.

  In order to achieve the above object, the present invention provides a method for removing a molded product from a molding die after molding the molded product with a molding die. Molding was performed at the same time as the molding, and then the take-out part was gripped by a gripping member and taken out from the mold.

Then, after the molded product is molded, when the mold is released, by gripping the take-out part with the gripping member, the molded product is surely released from the mold, but here, as the take-out part, For example, a protrusion etc. are suitable. If the takeout portions are provided at a plurality of locations depending on the product shape or the like, the product can be taken out in a more stable state.
In addition, as a gripping member for gripping the take-out part, it is provided on the side opposite to the vacuuming direction of the mold to be vacuumed, and when there is another mold on the side opposite to the vacuuming direction, It may be provided on the molding die, and if there is a member that holds the peripheral edge of the molded product, it may be provided on this member, or may be provided separately from these members. Also good.
And if a non-product part is removed by trimming etc. after taking out a molded article, the external appearance of a product part will not be deteriorated.

  When molding a molded product with a molding die, if a molding part take-out part for molding is simultaneously formed in a non-product part of the molded product, and then this take-out part is gripped by a gripping member and taken out from the molding die, The molded product can be taken out in a stable state, and can be constructed at low cost without incurring equipment costs.

Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is a plan view of a first forming die of a vacuum forming die according to the present invention, FIG. 2 shows a protrusion of the forming die for forming a take-out portion on a molded product, and FIG. A-A line sectional view, (b) is a BB line sectional view of FIG. 1, and FIG. 3 is an explanatory view showing a procedure for taking out a molded product.

  The method for taking out a molded product according to the present invention is applied to taking out a molded product of a two-cavity vacuum molding die that simultaneously molds two instrument panels for a vehicle. This vacuum molding die is basically shown in FIG. The lower first molding die 1 on the side to be evacuated as shown in FIG. 2, the upper second molding die (not shown), and the first and second molding dies are not gripped by the peripheral edge of the thermoplastic resin sheet. The gripping frame shown in the figure is provided.

  As shown in FIG. 1, the first mold 1 is provided with a pair of product shape portions 1 a for forming a product portion of the molded product, and other portions are formed on the non-product portion of the molded product. The corresponding non-product shape portion 1b is used. And in this non-product shape part 1b, the center part pinched by a pair of product shape part 1a is provided with the several protrusion 2 in two rows at predetermined intervals.

As shown in FIG. 2, the protrusion 2 is a flat plate-like member having a certain width. In this embodiment, the protrusion 2 has a tapered shape in which the tip side is tapered in both the width direction and the length direction. The relationship between the average length x in the horizontal direction and the interval y between the adjacent protrusions 2 is such that the horizontal length x of the protrusions ≧ the interval y between the protrusions.
This is because if the average length x in the lateral direction of the protrusion 2 is smaller than the protrusion interval y, stable extraction becomes difficult, and thus more stable extraction is possible.
Incidentally, if the interval y between the projections 2 is zero, that is, if there is no interval y and the projection 2 is in a single linear long state, when the molded product is molded, the product part of the molded product has an adverse effect such as wrinkles. Is more likely to occur.

On the other hand, in the embodiment, a gripping member 3 as shown in FIG. 3 is provided in a second mold (not shown) corresponding to the position of the protrusion 2 of the first mold 1. The gripping member 3 is provided with a claw 5 that can be opened and closed by the operation of the air chuck 4 so that the take-out portion Wt of the molded product W formed by the projection 2 of the first mold 1 can be gripped. ing.
The gripping member 3 may be provided on a gripping frame (not shown) that grips the periphery of the thermoplastic resin sheet, or may be provided on an independent dedicated member or the like separately from these.

A method for molding and taking out a molded product using the first mold 1 will be described.
A thermoplastic sheet such as a TPO or PP sheet can be molded into a sheet of about 180 ° C from a decorative sheet decorated with a concavo-convex pattern, a leather pattern, a texture pattern such as a geometric pattern, or a satin finish. It is heated to a temperature, brought into contact with the molding surface of the first mold 1 and then evacuated. The mold temperature of the first mold 1 at this time is a temperature at which a sheet of about 70 ° C. can be solidified.

  Then, in the product shape portion 1a of the first mold 1, the product portion of the molded product W is formed, and at the same time, the extraction portion Wt as shown in FIG. 3 is formed in a convex shape by the protrusion 2 of the non-product shape portion 1b. Is done.

When the molded product W is solidified, the molded product W is taken out. That is, from the state shown in FIG. 3A, as shown in FIG. 3B, when the air chuck 4 of the gripping member 3 is actuated to close the claw 5 and grip the take-out portion Wt, as shown in FIG. The gripping member 3 moves in the direction away from the first mold 1 and the take-out part Wt is detached from the protrusion 2.
Here, in order to move the gripping member 3 in the direction away from the first mold 1, when the gripping member 3 is provided in a second mold (not shown), the mold is opened. The second mold is raised, and when the gripping frame (not shown) is provided, the gripping frame is raised, and when it is provided on the independent dedicated member, the independent dedicated member is raised.

Then, if necessary, a product take-out machine is inserted below the gripping member 3, and when the air chuck 4 of the gripping member 3 is operated to the open side and the claw 5 is opened, the molded product W is dropped and taken out. The
By such a procedure, a situation in which the intermediate portion of the molded product W is bent is suppressed, and the molded product W can be taken out in a stable state.
After that, if the non-product part of the molded product W is removed by trimming, there is no problem that the appearance looks worse.

In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, in the above-described embodiment, an example of a vacuum forming die that takes two molded articles is shown, but the forming die is not necessarily limited to a two-cavity type. Further, the second mold is not an essential requirement.

  After molding a molded product with a molding die, when taking out the molded product, a non-product part of the molded product is formed with a take-out part, and this take-out part is held by a gripping member so that it is always in a stable state. The molded product can be taken out.

The top view of the 1st shaping | molding die of the vacuum forming die which concerns on this invention The protrusion of the shaping | molding die for shape | molding the extraction part to a molded article is shown, (a) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of FIG. Explanatory drawing showing how to take out the molded product Explanatory drawing of molded product removal by conventional vacuum forming die (single piece)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st shaping | molding die, 1b ... Non-product part, 2 ... Protrusion, 3 ... Holding member, W ... Molded article, Wt ... Extraction part.

Claims (1)

A method of removing a molded product from the mold after molding the molded product with a molding die, and forming a molded product take-out portion on the non-product portion of the molded product simultaneously with the molding of the molded product, And a step of gripping the take-out portion with a gripping member and taking out the part from the mold.