JP2006095749A - Molded product, molded product molding machine and molded product molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded product molding machine simple in constitution, capable of molding a molded product having an undercut part without forming a parting line on a design surface and capable of easily and certainly ejecting the molded product. <P>SOLUTION: The molded product molding machine is constituted so as to mold 1, which has the undercut part 1a and also has the design surface F1 and a non-design surface F2 formed thereto, in the cavity formed in an on-off mold 2 and equipped with a mold 2, wherein a slide core 22 for forming the undercut part 1a of the molded product 1 is arranged corresponding to the non-design surface F2 and a molding part 23 for respectively forming means 5 to be locked at a plurality of predetermined positions 1a and 1b of the non-design surface F2 of the molded product 1 is formed, and an ejector 7 for locking a locking means 6 with the means 5 to be locked formed to the non-design surface F2 of the molded product 1 to release and eject the molded product 1 from the mold 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a molded article, a molded article molding apparatus, and a molded article molding method, and in particular, has an undercut portion due to a cavity formed in a mold that can be opened and closed, and has a design surface and a non-design surface. Molded molded article, apparatus for molding a molded article having an undercut portion and having a design surface and a non-design surface formed by a cavity formed in a mold that can be opened and closed, and a method thereof It is.

A mold is closed with a predetermined pressure, a cavity is formed in the mold, and a molding material such as resin that has been fluidized by heating and melting is injected into the cavity to form a molded product of a predetermined shape. In general, the molded product is taken out by ejecting an ejector pin after the mold is opened or by adsorbing the molded product with a suction pad. And in a molded product, there are cases where a design surface that touches human eyes as a product and a non-design surface that does not touch human eyes are molded. In addition, when the shape of the molded product has an undercut portion having a negative angle with respect to the mold opening / closing direction, a movable core such as a slide core that moves in a direction different from the mold opening / closing direction so that the mold can be opened / closed is provided. It is conventionally known to provide a mold with a split structure (for example, Patent Document 1).
In Patent Document 1, in a mold for injection molding in which a product-shaped cavity is formed between molds when the fixed side mold and the movable side mold are closed, either the fixed side mold or the movable side mold, A concave concave undercut molding part is formed and an ejector pin for releasing a resin molded product is provided, and a convex convex undercut molding part is formed on the other movable side mold or fixed side mold to form a concave undercut. Fixed-side mold with extrusion means for extruding the resin molded product in a direction in which the undercut portion of the resin molded product molded by the cut molded portion moves away from the concave undercut molded portion and the slide core for forming the convex undercut molded portion Alternatively, an injection molding die characterized in that the movable side die is provided so as to be able to advance and retreat is disclosed.

JP 2003-245955 A

However, when a mold having a movable core such as a slide core is used, a parting line is formed between the movable core and the mold on the side where the movable core is provided. There is a problem in that the movable core cannot be provided on the mold on the side for molding the design surface of the product, and the degree of freedom of configuration of the mold is limited.
Also, if the ejector pin is ejected to take out the molded product, the ejector pin will be marked on the molded product, so the ejector pin cannot be provided on the side where the design surface of the mold is molded, and the degree of freedom in configuring the mold. There was a problem that was limited. On the other hand, when the molded product is sucked and taken out by the suction pad, it is necessary to bring the suction pad into close contact with the flat surface of the molded product. There are restrictions on the posture and orientation, and furthermore, it is difficult to stably adsorb and take out the molded product.
Therefore, when molding a molded product having an undercut portion, the movable core and the ejector are provided on the molding die on the side for molding the non-design surface of the molded product, and the mold is left on the molding die on the other side. There is a problem in that it is necessary to open and elastically deform the molded product so as to remove the undercut portion of the molded product and take it out of the mold. And due to this problem, the molding cycle time cannot be shortened because the molded product cannot be taken out until the molded product is cooled depending on the manual work, and when the molded product is particularly large. There were problems such as having difficulty in removing the molded product.

The present invention has been made in view of the above-described problems, has an undercut portion with a simple configuration, and can be easily and reliably taken out after the design surface and the non-design surface are formed. The object is to provide a molded product.
In addition, the present invention has been made in view of the above-described problems, and has a simple configuration, a molding die that has an undercut portion and has a design surface and a non-design surface that can be opened and closed. It is an object of the present invention to provide a molded product molding apparatus that can be easily and reliably taken out after being molded by a cavity formed therein.
Furthermore, the present invention has been made in view of the above-described problems, and has a simple configuration, a molding die that has an undercut portion and has a design surface and a non-design surface that can be opened and closed. An object of the present invention is to provide a method for molding a molded product that can be easily and reliably taken out after being molded by a cavity formed therein.

In order to achieve the above object, the invention according to claim 1 has an undercut portion and a design surface and a non-design surface formed by a cavity formed in a mold that can be opened and closed. It is a molded product, the non-design surface of the undercut part is formed by the movable core, and the engaged means to be engaged with the engaging means of the take-out device are formed at a plurality of predetermined positions on the non-design surface. It is characterized by.
In order to achieve the above object, the invention relating to the molded product molding apparatus according to claim 2 has a molded product having an undercut portion and having a design surface and a non-design surface formed in a mold that can be opened and closed. A molding apparatus for molding by a formed cavity, wherein a movable core for forming an undercut portion of a molded product is disposed corresponding to the non-design surface, and is disposed at a plurality of predetermined positions on the non-design surface of the molded product. Engagement means molding portions that respectively form engaged means are formed in the mold, and the engagement means is engaged with each engaged means formed on the non-design surface of the molded product. It is characterized by having a take-out device for taking out the molded product by releasing it.
In order to achieve the above-mentioned object, the invention according to the third aspect of the present invention provides a molded product having an undercut portion and having a design surface and a non-design surface formed in a mold that can be opened and closed. A molding method for molding by a formed cavity, wherein a movable core for forming an undercut portion of a molded product is disposed corresponding to a non-design surface, and a plurality of non-design surfaces are formed when molding the molded product. Engagement means of the take-out device is engaged with each engaged means formed on the non-design surface of the molded product after each engaged means is formed at a predetermined position and the mold is opened. It is characterized in that it is taken out from the mold.

In the first aspect of the invention, the mold is closed to form a cavity therein, and the molded product is molded by injection-filling the melt-fluidized molding material into the cavity. At this time, since the mold is closed, the movable core is moved so as to form a non-design surface in the undercut portion of the molded product, thereby partially configuring the cavity. And the shaping | molding die is comprised so that several to-be-engaged means may be formed in the predetermined position of the non-design surface of a molded article. Therefore, when the molding material is solidified and the molding is completed, and the movable core is moved so as to be retracted from the undercut portion, and the mold is opened at the same time, the non-design surface on which the engaged means is formed. Remains on the mold on the side where the design surface is molded by releasing from the mold, and the engaged means is exposed. Accordingly, it is possible to take out the molded product by releasing the molded product from the mold on the side for molding the design surface by engaging the engaging means of the take-out device with the engaged means.
In the invention of claim 2, the molded product is molded by closing the mold, forming a cavity therein, and injecting and filling the melt-fluidized molding material into the cavity. At this time, by closing the mold, the movable core moves so as to form a non-design surface in the undercut portion of the molded product, thereby partially configuring the cavity. And the shaping | molding die is comprised so that several to-be-engaged means may be formed in the predetermined position of the non-design surface of a molded article. When the molding material of the molded product is solidified and molding is completed, the movable core moves so as to retract from the undercut part, and at the same time, the mold is opened, and the non-design surface on which the engaged means is formed is released from the mold. The molded product remains in the mold on the side where the design surface is molded, and the engaged means is exposed. Therefore, the engaging means of the take-out device is engaged with the engaged means, and the molded product is released from the mold on the side for molding the design surface.
In the invention of claim 3, the mold is closed and a cavity is formed therein. At this time, the movable core for forming the undercut portion of the molded product can be formed corresponding to the non-design surface so that the non-design surface in the undercut portion of the molded product can be formed. Partially construct the cavity. And the formed cavity is comprised so that several to-be-engaged means may be formed in the predetermined position of the non-design surface of a molded article. Therefore, when the melted and fluidized molding material is injected and filled into the cavity, and the molding material is solidified and molding of the molded product is completed, an undercut portion of the non-design surface is formed by the movable core, and a plurality of non-design surfaces are formed. A molded product in which the engaged means is formed at a predetermined position is molded. When the molding material of the molded product is solidified and molding is completed, the movable core is moved away from the undercut portion, and at the same time, the mold is opened and the non-design surface on which the engaged means is formed is molded. The molded product is left in the mold on the side where the design surface is molded by releasing from the mold, and the engaged means is exposed. Next, the engaging means of the take-out device is engaged with the engaged means, and the molded product is released from the mold on the side on which the design surface is molded, and is taken out.

According to invention of Claim 1, the non-design surface of the undercut part of a molded product is formed by a movable core, and the to-be-engaged means engaged with the engagement means of a taking-out apparatus are several predetermined positions of a non-design surface. To provide a molded product that can be formed easily and reliably, with an undercut portion formed without a parting line on the design surface, with a simple configuration of Can do.
According to invention of Claim 2, the movable core for forming the undercut part of a molded product is arrange | positioned corresponding to a non-design surface, and it engages with each of several predetermined positions of the non-design surface of a molded product, respectively. Engagement means forming portions for forming means are formed in the mold, and the engagement means is engaged with each engaged means formed on the non-design surface of the molded product to separate the molded product from the mold. With a simple configuration that includes a take-out device that can be molded and taken out, a molded product having an undercut portion can be formed without forming a parting line on the design surface, and can be taken out easily and reliably. It is possible to provide a molded product molding apparatus that can perform the above-described process.
According to invention of Claim 3, the movable core for forming the undercut part of a molded article is arrange | positioned corresponding to a non-design surface, and when shape | molding a molded product, each in the some predetermined position of a non-design surface After forming the engaged means and opening the mold, the engaging means of the take-out device is engaged with each engaged means formed on the non-design surface of the molded product to release the molded product from the mold. A molded product molding method that can form a molded product having an undercut portion without forming a parting line on the design surface with a simple configuration of removing the molded product, and that can be easily and reliably removed. Can be provided.

First, an embodiment of the molded product molding apparatus of the present invention will be described in detail based on FIG. 1 and FIG. Note that, in different embodiments, the same or corresponding parts are denoted by the same reference numerals and description thereof is omitted.
The molded product molding apparatus of the present invention is roughly a cavity formed in a mold 2 that can be opened and closed with a molded product 1 having an undercut portion 1a and having a design surface F1 and a non-design surface F2. 3, the movable core 22 for forming the undercut portion 1a of the molded product 1 is disposed corresponding to the non-design surface F2, and a plurality of non-design surfaces F2 of the molded product 1 are provided. Engagement means molding portions 23 for forming the engaged means 5 at the predetermined positions 1a and 1b are formed in the mold 2 and the respective engaged means 5 formed on the non-design surface F2 of the molded product 1. A take-out device 7 is provided that engages the engaging means 6 to release the molded product 1 from the mold 2.
In this embodiment, the molded product 1 has a panel shape with a bent cross section, the design surface F1 is a surface located downward from the left side of the figure, and the non-design surface F2 is the figure. A case where the surface is located from the right to the upper side will be described.

The mold 2 includes a fixed mold 20 positioned below, a movable mold 21 positioned above, and a slide core 22 as a movable core provided only on the movable mold 21. The mold opening / closing direction of the movable mold 21 with respect to the fixed mold 20 is a vertical direction as shown by an arrow in FIG. The cavity surface of the fixed mold 20 molds the design surface F1 of the molded product 1, and the cavity surfaces of the movable mold 21 and the slide core 22 mold the non-design surface F2 of the molded product 1. Then, when the mold 2 is opened after the molding is completed, the draft of the engaged means forming portion 23 or the like is set so that the molded product 1 remains on the fixed mold 20 with the design surface F1 formed. The shape is set and configured. When the movable mold 21 is opened / closed relative to the fixed mold 20, the movable mold 21 interferes with the non-design surface F2 of the molded product 1 remaining on the fixed mold 20, that is, corresponds to the negative angle portion 20a. Thus, the slide core 22 is divided from the movable mold 21 so as to be movable forward and backward. That is, the slide core 22 for forming the undercut portion 1a is provided only on the movable die 21 for molding the non-design surface F2, without being provided on the fixed die 20 for molding the design surface F1 of the molded product 1. . It should be noted that the slide core 22 employs known drive means configured to move forward and backward as the movable mold 21 moves toward and away from the fixed mold 20 such as a cam mechanism including a hydraulic cylinder and an inclined pin. Can do. Further, the present invention is not limited to the slide core 22 that is moved in a direction substantially orthogonal to the mold opening / closing direction, and is different from the mold opening / closing direction, such as an inclined core that is moved at a predetermined angle with respect to the mold opening / closing direction. What is moved in the direction is included in the movable core.
On the cavity surface of the movable mold 21 and the slide core 22, an engaged means forming portion 23 for forming a plurality of engaged means 5 on the non-design surface F <b> 2 of the molded product 1 is formed. In this embodiment, the engaged means 5 is disposed at a position 1b that is substantially symmetrical to the slide core 22 and the undercut portion 1a that are arranged corresponding to the undercut portion 1a of the non-design surface F2 of the molded product 1. Established. Further, the engaged means forming portion 23 is provided with punch pins 8 for making holes 5a for engaging the formed engaging means 5 with engaging means 6 (described later) of the take-out device. ing. The punch pin 8 is connected to a driving means such as a hydraulic cylinder and is driven so as to move in a direction perpendicular to the drawing sheet.

The take-out device 7 separates the molded product 1 from the fixed mold 20 and the engaging means 6 to be engaged with the respective engaged means 5 formed on the non-design surface F2 of the molded product 1. Drive means 70 for driving each engagement means 6 so that it can be taken out. The driving means 70 in this embodiment includes an actuator 71 composed of a fluid pressure cylinder or the like to which the engaging means 6 to be engaged with the engaged means 5 formed in the undercut portion 1a is joined, and the actuator 71. A supporting member 72 to be supported, and an engaging means 6 which is supported by the supporting member 72 so as to be slidable within a predetermined range and engaged with an engaged means 5 which is formed at a position 1b symmetrical to the undercut portion 1a. And an actuator 74 such as a robot arm that supports and supports the support member 72 and moves it.
The engaging means 6 is configured to pass through and hold the hole 5a of the engaged means 5 formed by the punch pin 8, and can be configured as a claw or finger that can be opened and closed. The engagement / release of the engagement means 6 with respect to the engaged means 5 may be configured to be automatically performed by a manipulator or the like, or may be configured to be performed manually. The actuator 71 is fixed to one end side of the support member 72, and a guide member 75 is pivotally attached to the other end side of the support member 72. An intermediate portion of the slide rod 73 is attached to the guide member 75. It is inserted. A stopper 73 a that restricts sliding with respect to the guide member 75 is provided at the tip of the sliding rod 73.

  In addition, when a rib, a flange, a component attachment part, etc. are formed in the non-design surface F2 for the purpose of reinforcement of the molded product 1, these can also be utilized as the engaged means 5. Further, the punch pin 8 is not provided in the engaged means forming portion 23 of the movable die 21 and the slide core 22 but is provided at the tip of the actuator 71 and the sliding rod 73 of the engaging means 6 and functions as the engaging means 6. It is also possible to configure it. Furthermore, the engaging means 6 can be configured to sandwich the engaged means 5 without engaging with the hole 5a of the engaged means 5 of the molded article 1. Further, the take-out device 7 is not limited to the combination of the actuator 71 and the sliding rod 73, and is constituted by an actuator similar to the actuator 71 (see reference numeral 76 in FIGS. 5 to 7) instead of the sliding rod 73. May be. Further, the engaged means 5 and the engaging means 6 are limited to those configured to be engaged by passing a claw or finger-like engaging means 6 through a hole 5 a formed in the engaged means 5. The engagement means 5 is provided with a projection instead of the hole 5a, and the engagement means 6 is formed in a hook shape or the like that can be engaged with the projection of the engagement means 5. Other configurations such as a configuration in which a hook-like engaging means is engaged with the protrusion, or the engaging means 6 is configured by a hook that can be engaged with the hole 5 a of the engaged means 5 can be adopted. In addition, the mold can be provided with an ejector mechanism in the movable mold 21 that forms the non-design surface F2 so that the molded product remains in the fixed mold when the mold is opened. In the present invention, the design surface F1 is formed on the movable die 21 and the non-design surface F2 is formed on the stationary die 20 by providing the slide core 22 so that the molded product 1 becomes the movable die 21 when the mold is opened. It can also be configured to remain.

Next, one embodiment of the molded article 1 and the molding method of the present invention will be described in detail with reference to FIGS. 1 to 4 by using the molding apparatus configured as described above.
The molded product 1 of the present invention has an undercut portion 1a by a cavity 3 formed in the mold 2 that can be opened and closed, and a design surface F1 and a non-design surface F2 are molded. The non-design surface F2 of the undercut portion 1a is formed by the slide core 22, and the engaged means 5 to be engaged with the engagement means 6 of the take-out device 7 are at a plurality of predetermined positions 1a and 1b of the non-design surface F2. Is formed.
The molded product molding method of the present invention is generally formed in a mold 2 that can be opened and closed, with the molded product 1 having the undercut portion 1a and having the design surface F1 and the non-design surface F2 formed therein. The slide core 22 for forming the undercut portion 1a of the molded product 1 is disposed corresponding to the non-design surface F2, and the non-design surface F2 is formed when the molded product 1 is molded. The engaged means 5 is formed at each of the plurality of predetermined positions 1a and 1b, the mold is opened, and then the engaged means of the take-out device 7 is attached to each engaged means 5 formed on the non-design surface F2 of the molded product 1. 6 is engaged, and the molded product 1 is released from the mold 2 and taken out.

When molding the molded product 1, as shown in FIG. 1, first, the movable mold 21 is driven close to the fixed mold 20 to close the mold, and is held with a predetermined clamping force. Then, the cavity 3 corresponding to the shape of the molded product 1 is formed. At this time, the slide core 22 moves forward as the mold closes, and configures the cavity 3 so that the non-design surface F2 of the molded product 1 can be molded together with the movable mold 21. When a molding material such as a melted and fluidized resin material is injected and filled in the cavity 3 in this state, the design surface F1 is formed by the fixed mold 20, and the non-design surface F2 is formed by the movable mold 21 and the slide core 22. In particular, the non-design surface F2 in the undercut portion 1a is formed by the slide core 22. And, the engaged means 5, 5 such as a rib shape or a bracket shape are formed by the engaged means forming portions 23, 23 at the position of the undercut portion 1a of the non-design surface F2 and the position 1b symmetrical to this position. Is formed. Thereafter, when the punch pins 8 provided in the engaged means forming portions 23 and 23 of the movable die 21 and the slide core 22 are respectively driven forward at an appropriate timing, the engaging means 6 of the take-out device 7 can be engaged. A hole 5 a is formed in the engaged means 5.
When the molding material is solidified and the molding of the molded product 1 is completed, each punch pin 8 is driven backward to drive the movable die 21 away from the fixed die 20, and the slide core 22 is moved along with the undercut portion 1a. Retract to evacuate and open the mold. In the molded product 1, the non-design surface F <b> 2 is released from the movable mold 21 and the slide core 22 and remains in the fixed mold 20.

Subsequently, as shown in FIG. 2, the engaging means 6, 6 joined to the actuator 71 and the sliding rod 73 of the take-out device 7 are formed on the non-design surface F <b> 2 of the molded product 1. 5 and 5 respectively. At this time, the actuator 71 is in an extended state, and the actuator 74 such as a robot arm has the engaging means 6 and 6 joined to the actuator 71 and the sliding rod 73 as the engaged means 5 of the molded product 1. 5 so that the undercut portion 1a of the molded product can be released from the fixed mold 20 and retracted from the portion 20a by the retracting drive of the actuator 71 later. 72 postures are controlled. The engaging means 6 of the take-out device 7 is engaged with the hole 5a of the engaged means 5 of the molded article 1 automatically by an actuator or the like depending on the configuration, or manually.
When the actuator 71 of the take-out device 7 is driven to retract from this state, as shown in FIG. 3, the molded product 1 is elastically deformed, and the design surface F1 around the undercut portion 1a is released from the fixed mold 20 to form the mold. It will come off so that it may retract from the negative angle part 20a with respect to the opening direction. On the other hand, the design surface F1 around the engaged means 5 formed at the position 1b symmetrical to the undercut portion 1a remains in a state where it is not released from the fixed mold 20. Next, as shown in FIG. 4, when an actuator 74 such as a robot arm is driven to change the posture of the support member 72, the stopper 73 a of the slide rod 73 comes into contact with the guide member 75 and its sliding is restricted. The design surface F1 around the engaged means 5 formed at a position 1b symmetrical to the undercut portion 1a is also released from the fixed mold 20, and the molded product 1 is moved in a direction including the mold opening / closing direction, so that any It can be carried out to the position. In addition, when it comprises with the actuator 76 instead of the sliding rod 73 (refer FIGS. 5-7), the design surface F1 around the to-be-engaged means 5 formed in the symmetrical position 1b with the undercut part 1a. If necessary, the design surface F1 around the engaged means 5 formed at the position 1b symmetrical to the undercut portion 1a by the actuator 76 is fixed to the fixed die 20. It can also be actuated to push.

Next, another embodiment of the molded product molding method of the present invention will be described in detail with reference to FIGS. Note that a description of the same or corresponding configuration as that of the above-described embodiment will be omitted, and only a different configuration will be described.
The take-out device 7 in this embodiment includes an actuator 76 instead of the sliding rod 73 in the above-described embodiment. When the molding of the molded product 1 is completed and the mold is opened and the molded product 1 is taken out, as shown in FIG. 5, both actuators 71 are connected to the engaged means 5 and 5 of the molded product 1 remaining on the fixed mold 20. , 76 are engaged with each other. At this time, the actuator 71 on the side engaged with the engaged means 5 formed in the undercut portion 1a retracts and engages with the engaged means 5 formed at a position 1b symmetrical to the undercut portion 1a. The actuator 76 on the connected side is in an extended state, and the actuator 74 such as a robot arm has an engaging means 6, 6 joined to both actuators 71, 76. The posture of the support member 72 is controlled so that the molded product 1 can be properly released from the fixed mold 20 by appropriately engaging with each other.

From this state, as shown in FIG. 6, the actuator 71 on the side engaged with the engaged means 5 formed in the undercut portion 1a is driven to extend and simultaneously formed at a position 1b symmetrical to the undercut portion 1a. When the actuator 76 on the side engaged with the engaged means 5 is driven to retract, the molded product 1 is moved so as to rotate while being elastically deformed, and the periphery of the undercut portion 1a is released from the fixed die 20. At the same time, the design surface F1 around the engaged means 5 formed at a position 1b symmetrical to the undercut portion 1a is also released from the fixed mold 20, and as a result, the undercut portion 1a of the molded product 1 is fixed to the fixed mold 20. As shown in FIG. 7, the molded product 1 is moved in a direction including the mold opening / closing direction and is carried out to an arbitrary position.
That is, in the molded product molding method of the present invention, when the molded product 1 having the undercut portion 1a molded by the molding die 2 is taken out, the take-out device 7 is connected to the engaged means 5 formed on the non-design surface F2. It is sufficient that the engaging means 6 is engaged so that it can be removed from the negative angle portion 20a with respect to the mold opening direction, released from the mold, and taken out.
Further, the molded product 1 of the present invention has the non-design surface F2 of the undercut portion 1a formed by the slide core 22, so that the parting line by the slide core is not formed on the design surface F1, and the Engaged means 5 to be engaged with the engaging means 6 of the take-out device is formed at predetermined positions 1a and 1b of the non-design surface F2, and the take-out device 7 is retracted from the negative angle portion 20a with respect to the mold opening direction. It is only necessary to be configured so that it can be removed from the mold and released and removed.

It is sectional drawing which shows one Embodiment of the shaping | molding die for shape | molding the molded article of this invention. It is sectional drawing which shows the state which opened the type | mold and engaged the engaging means of the taking-out apparatus with the to-be-engaged means of the molded article. FIG. 3 is a cross-sectional view showing a state in which the design surface around the undercut portion is released from the state of FIG. 2 and retracted from a negative angle with respect to the mold opening direction. The posture of the support member is changed from the state of FIG. 3, and the design surface around the engaged means formed at the position symmetrical to the undercut portion by the sliding rod is released from the fixed mold, and the molded product is molded. It is sectional drawing which shows the state which can be moved to directions including an opening-and-closing direction and can be carried out to arbitrary positions. It is sectional drawing which shows another embodiment of a taking-out apparatus. FIG. 6 is a cross-sectional view showing a state in which the design surface of the molded product is released from the state of FIG. 5 by rotating the molded product so as to retract from a negative angle with respect to the mold opening direction. It is sectional drawing which shows the state which can change the attitude | position of a supporting member from the state of FIG. 6, can move a molded article to the direction including a mold | die opening / closing direction, and can be carried out to arbitrary positions.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Molded article, 1a: Undercut part, F1: Design surface, F2: Non-design surface, 2: Mold, 3: Cavity, 5: Engagement means, 6: Engagement means, 7: Extraction device, 20 , Fixed type, 20a: negative angle part, 21: movable type, 22: slide core (movable core), 23: engaged means forming part

Claims (3)

A molded product having an undercut portion and a design surface and a non-design surface formed by a cavity formed in a mold that can be opened and closed,
The non-design surface of the undercut part is formed by the movable core,
A molded product characterized in that engaged means engaged with engaging means of a take-out device are formed at a plurality of predetermined positions on a non-design surface. A molding apparatus for molding a molded product having an undercut portion and having a design surface and a non-design surface formed by a cavity formed in a mold that can be opened and closed,
The movable core for forming the undercut portion of the molded product is disposed corresponding to the non-design surface,
Engaged means molding portions for forming engaged means respectively at a plurality of predetermined positions on the non-design surface of the molded product are formed on the mold.
An apparatus for molding a molded product, comprising: a take-out device for engaging the engaging means with each engaged means formed on the non-design surface of the molded product to release the molded product from the mold. A molding method in which a molded product having an undercut portion and formed with a design surface and a non-design surface is molded by a cavity formed in a mold that can be opened and closed,
A movable core for forming the undercut part of the molded product is arranged corresponding to the non-design surface,
When forming a molded product, each engaged means is formed at a plurality of predetermined positions on the non-design surface,
Molding characterized in that after opening the mold, the engaging means of the take-out device is engaged with each engaged means formed on the non-design surface of the molded product, and the molded product is released from the molding die. Product molding method.

Images