JPH0664824U - Mold release equipment - Google Patents

Abstract

(57) [Summary] [Structure] The first molded article 16 that is in close contact with the core mold 2
To the third ejector pins 7a ... 7b ... 7c ... and when peeled from the core mold 2, one side of the outer peripheral portion of the molded product 16 precedes the other side and the first ejector pin 7a And push it up to peel it off,
Air is supplied to the separated portion by the block 17 and the air supply pipe 18 immediately above. [Effect] The air supplied to the peeled portion on one side of the outer peripheral portion of the molded product 16 resists the sealing force acting on the bonded surface between the molded product 16 and the core die 2 and the inner peripheral portion of the bonded surface. Since it reaches the other side of the outer peripheral portion, the molded product 16 and the core mold 2 are completely separated. Therefore, the molded product 16 can be easily separated from the core mold 2. Further, since the entire molded product 16 is pushed up after completely peeled off, the molded product 16
It is possible to suppress the bending of the blade to a minimum and prevent the deformation and damage due to the bending.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molded product releasing apparatus used when a molded product produced by a molding device such as a plastic molding device is taken out of the device.

[0002]

[Prior art]

 A molding device such as a plastic molding device is adapted to be used suitably when mass-producing a part having a predetermined shape, and normally, as shown in FIG. 5, a cavity for forming a molded product 54 to be a part. A mold 51 and a core mold 52, and a molded product releasing device used when taking out the formed molded product 54 are provided.

The cavity mold 51 and the core mold 52 described above are designed to form a cavity portion 53, which is a space corresponding to the shape of a component, when the mold is closed. The cavity formed by the mold closure. By supplying the resin to the portion 53, the molded product 54 is produced.

In addition, conventionally, the molded product releasing apparatus is provided with a plurality of ejector pins 55 that are movably provided in the core mold 52 and ejectors that are fixedly provided at the lower end portions of these ejector pins 55. The ejector plate 56 includes a plate 56 and a plate moving mechanism (not shown) that reciprocates the ejector plate 56 in the vertical direction. The plate moving mechanism simultaneously raises all the ejector pins 55 ... The molded product 54 that is in contact with the upper ends of the pins 55 is peeled off from the core mold 52.

[0005]

[Problems to be solved by the device]

 However, in the above-described conventional molded product releasing apparatus, since the joint surface between the molded product 54 and the core mold 52 is hermetically sealed, the ejector pins 55 are arranged at the outer peripheral portion of the molded product 54. For example, when used in a glazing-type molding device, it is difficult to separate the molded product 54 from the core mold 52.

That is, in the molded product releasing apparatus in which the disposing position of the ejector pins 55 is limited to the outer peripheral portion of the molded product 54, the ejector pins 55 are lifted in order to separate the molded product 54 from the core mold 52. In such a case, the entire upward biasing force of the ejector pins 55 is applied to the outer peripheral portion of the molded product 54, and the outer peripheral portion of the molded product 54 is separated from the core mold 52. Become. However, even if the outer peripheral portion of the molded product 54 is separated from the core mold 52, the joint surface between the molded product 54 and the core mold 52 is in a sealed state, so the sealing force acting on the joint surface of the inner peripheral portion is Will bend the molded product 54, and maintain the sealed state of the inner peripheral portion of the molded product 54.

As a result, in the conventional molded product releasing apparatus, when the position where the ejector pins 55 are arranged is limited to the outer peripheral portion of the molded product 54, the molded product 54 can be separated from the core mold 52. This becomes difficult, and in particular, this difficulty in peeling becomes more remarkable as the size of the molded product 54 increases and the joint surface between the molded product 54 and the core mold 52 increases. Further, depending on the material used for the molded product 54, the flexure of the molded product 54 at the time of peeling may cause deformation or damage.

Therefore, in the present invention, even if the position of the ejector pins 55 ... Is limited to the outer peripheral portion of the molded product 54, the molded product 54 can be easily separated from the core mold 52. It is intended to provide a mold release device.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the molded product releasing apparatus according to the invention of claims 1 to 4 pushes up a molded product, which is in close contact with the molding die, through a push-up member and separates it from the molding die. And has the following features.

That is, in the molded product releasing apparatus according to the first aspect, the pushing-up timing of the pushing-up member arranged on the other side is delayed from the pushing-up timing of the pushing-up member arranged on one side of the outer peripheral portion of the molded product. It is characterized by having a push-up delay means and an air supply means for supplying air to the separated portion.

According to a second aspect of the present invention, there is provided a molded product releasing apparatus, wherein the air supply means according to the first aspect is provided on a push-up member arranged on one side, and the molded product abuts on the upper surface of the device. It has a block directly above which air is supplied to the side surface on the circumferential side, and is characterized in that the side surface is set to an obtuse angle with respect to the joint surface between the molding die and the molded product.

Further, the molded product release apparatus according to claim 3 is characterized in that the block immediately above the claim 2 has a runner gate that causes a step on the upper surface.

According to a fourth aspect of the present invention, in the molded product releasing apparatus, the push-up delay means according to the first aspect fixes and supports the push-up member disposed on one side, and the push-up member disposed on the other side. The material is movably supported in the push-up direction, and is moved along with the push-up plate, and is moved together with the push-up plate, and after the push-up plate has moved a predetermined distance in the push-up direction, it is placed on one side of the above. And a contact support member that contacts the push-up member and moves in the push-up direction.

[0014]

[Action]

 According to the configurations of claims 1 and 4, the air supplied to the peeled part on one side of the outer peripheral portion of the molded product resists the sealing force acting on the joint surface between the molded product and the molding die. Since it reaches the other side of the inner peripheral portion and the outer peripheral portion of the joint surface, the molded product and the molding die are completely separated. Therefore, even when the arrangement position of the push-up member is limited to the outer peripheral portion of the molded product, the molded product can be easily separated from the molding die. Furthermore, since the entire molded product is pushed up after being completely peeled off, the bending of the molded product can be suppressed to a minimum, and as a result, it is possible to prevent the deformation and damage due to the bending.

Further, according to the configuration of claim 2, since air flows along the side surface having an obtuse angle with respect to the joint surface between the molding die and the molded product, the outer peripheral portion of the molded product is The air supplied to the separated portion on one side has a flowing direction from one side to the other side. Therefore, since the air is forced to flow from one side of the outer peripheral portion of the molded product to the other side, the molded product can be peeled off more easily and the time required for peeling can be shortened. Become.

Further, according to the structure of claim 3, by shaping the end portion of the molded product into the shape of a runner gate, the molded product can be removed when the molded product is pushed up by the block and air to separate the molded product. It becomes possible to prevent falling off from the molding die.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

The molded product release apparatus according to this embodiment is mounted on a molding apparatus including a cavity mold 1 and a core mold 2 (molding mold) as shown in FIG. 1, for example. ing . The cavity mold 1 is configured to reciprocate in the vertical direction, which is the arrow direction, by a cavity mold moving means (not shown). On the other hand, the core mold 2 is fixed to the mounting plate 3 via a plurality of support members 4. Thus, the mold closing in the state where the cavity mold 1 and the core mold 2 are in contact with each other is performed by moving the cavity mold 1 in the direction of the core mold 2 (downward). On the other hand, the mold opening in a state where the cavity mold 1 and the core mold 2 are separated from each other is performed by moving the cavity mold 1 in the direction opposite to the direction of the core mold 2 (upward). Has become.

Between the cavity mold 1 and the core mold 2 whose molds are closed, a cavity portion 15 which is a space portion matching the outer shape of the component is formed. A hard resin such as an acrylic resin or a soft resin is supplied to the cavity portion 15. These resins are subjected to a molding process such as pressurization or heating so as to match the shape of the cavity portion 15. The molded product 16 is formed by being applied.

Further, around the cavity portion 15 between the cavity mold 1 and the core mold 2, there are arranged the first plate 5 ... And the second plate 6 ... Used for adjusting the alignment when the mold is closed. Has been done. The first plates 5 ... Are provided in the cavity mold 1 and are used for adjusting the lateral alignment. On the other hand, the second plates 6 ... Are provided on the core mold 2 and are used for adjusting the vertical alignment. The adjustment of alignment is performed by changing the thickness of the first plate 5 ... And the second plate 6 ...

As shown in FIG. 2, the core die 2 is provided with first to third ejector pins 7a ... 7b ... 7c. Has been done. The first ejector pins 7a ... Are arranged on the left side (the other side) in the figure, and the second ejector pins 7b ... Are arranged from the position closest to the center of the molded product 16 on the right side (the one side) in the figure, for example. Four are arranged. Further, the third ejector pins 7c ... Are arranged between the first ejector pins 7a ... And the second ejector pins 7b. The first to third ejector pins 7a ... 7b ... 7c ... Are used as constituent members of the molded product releasing apparatus, and the configuration of the molded product releasing apparatus will be described below.

As shown in FIG. 1, the molded product releasing apparatus includes an ejector plate, which will be described later, and the first to third ejector pins 7a ... 7b ... 7c. 8 (push-up plate), a support pin 9 for preventing displacement of the ejector plate 8 during movement, and a plate moving mechanism (not shown) for moving the ejector plate 8 in the vertical direction.

The response time of the first ejector pins 7a ... Is delayed when the ejector plate 8 is raised in the upward pushing direction, as compared with the second and third ejector pins 7b ... 7c. This delay in the response time is caused through the second and third ejector pins 7b ... 7c ... rather than the time when one side of the outer peripheral portion of the molded product 16 is pushed up through the first ejector pins 7a. The timing of pushing up the other side of the outer peripheral portion of the item 16 is delayed.

The above-mentioned delay of the response time is due to the ejector plate 8 that fixedly supports the second and third ejector pins 7b ... 7c ... And the first ejector pin 7a. 1 Ejector pin 7a Abutment plate 12 fixed to the lower end, Ejector support member 11 (abutment support member) having a recess 11a capable of accommodating this abutment plate 12, and lower surface of ejector support member 11 The push-up delay mechanism (push-up delay means) provided with the balance adjusting screw 13 (abutment support member) penetrating in the direction of the concave portion 11a and the backup pin 14 fixed to the mounting plate 3. Has become.

The backup pin 14 is movably provided in the balance adjusting screw 13 so that the upper end thereof is located in the recess 11 a, and when the upper end contacts the contact plate 12, The upper end of the ejector pin 7 is aligned with the upper surface of the core mold 2. The recess 11a formed in the ejector support member 11 accommodates the contact plate 12 when the ejector plate 8 is lifted by the plate moving mechanism, so that the first ejector pin 7a of the driving force of the plate moving mechanism is accommodated. It is designed to delay the transmission to. In this embodiment, the depth of the concave portion 11a is set to 10 mm, and the concave portion 11a is configured so that the transmission of the driving force is delayed until the ejector plate 8 moves up by 10 mm.

Further, the balance adjusting screw 13 penetrating the ejector supporting member 11 can have its upper end set at an arbitrary position in the vertical direction in the recess 11a. As a result, the balance adjusting screw 13 contacts with the contact plate 12 before the contact plate 12 housed in the recess 11a contacts the bottom surface of the recess 11a, thereby delaying the time for delaying the transmission of the driving force. It is adjustable.

On the other hand, the second and third ejector pins 7b ... 7c ... provided on the right side of the core mold 2 in the figure have their lower ends fixed to the ejector plate 8 to drive the plate moving mechanism. The force is immediately transmitted through the ejector plate 8. Direct upper blocks 17 are provided on the upper ends of the second ejector pins 7b, respectively, and the upper faces of the direct upper blocks 17 are on the upper surface of the core mold 2 when the ejector plate 8 is located at the lowermost end. It is supposed to match. It is desirable that the upper surface of the block 17 directly above has a large area in order to prevent the damage of the molded product 16 by dispersing the urging force when pushing up the molded product 16 and separating it from the core mold 2. Further, the block 17 directly above may be formed integrally with the second ejector pin 7b.

As shown in FIG. 2, the block 17 directly above has a substantially rectangular shape when viewed from the cavity mold 1 in the direction of the core mold 2. As shown in FIG. . 17a, 17b, ... Stand up tilted outward from the bottom surface to which the second ejector pin 7b is connected. The inclination angle of each side surface 17a, 17b, ... With respect to the bottom surface is such that the side surface 17a on the inner peripheral side of the core mold 2 is set to, for example, 10 degrees, while the other side surfaces 17b ,. ing. Since this inclination angle sets the air flow direction to the inner peripheral side of the molded product 16, the side surface 17a is the upper surface of the core mold 2 and the molded product 16 and the core mold 2 are joined together. Any angle that is an obtuse angle with respect to the surface may be used.

An air guide groove 17c is formed from a bottom surface to an upper surface of a side surface 17a of the above block 17 which is located inward of the core mold 2. Below the air guiding groove 17c, an outlet of an air supply pipe 18 penetrating the inside of the core mold 2 is arranged. The air supply pipe 18 is supplied with air from the side wall of the core mold 2. It is supposed to be. The air supply timing is started when the molded product 16 is created and the mold is opened, and the first and second ejector pins 7a ... It is designed to be stopped after a lapse of a predetermined time for complete peeling.

A runner gate 17d is formed on the upper surface of the block 17 immediately above. The runner gate 17d is formed so as to cut out a portion located in the outer direction of the core mold 2 to form a step with respect to the upper surface, and the end of the molded product 16 is molded into the shape of the runner gate 17d. By doing so, the molded product 16 is prevented from falling off the core mold 2 when the molded product 16 is pushed up by the block 17 and air to be peeled off. The runner gate 17d may be formed in a convex shape that causes a step higher than the upper surface as long as it causes a step on the upper surface.

The operation of the molded product release apparatus having the above configuration will be described.

First, prior to producing the molded product 16, the ejector plate 8 is positioned at the lowermost end, as shown in FIG. As a result, the contact plate 12 provided on the first ejector pin 7a contacts the backup pin 14, so that the upper end of the first ejector pin 7a coincides with the upper surface of the core mold 2. In addition, the upper surface of the block 17 directly above the second ejector pin 7b coincides with the upper surface of the core mold 2, and the upper end of the third ejector pin 7c coincides with the upper surface of the core mold 2. become.

Next, the cavity mold 1 is lowered and the mold is closed to form the cavity portion 15. Then, the resin is supplied to the cavity portion 15 and subjected to a molding process such as pressurization or heating, whereby the molded product 16 is produced. After that, as shown in FIG. 4, the molded product 16 is taken out from the molding apparatus, so that the cavity mold 1 is lifted and the mold is opened.

When the mold opening is started, air is supplied to the air supply pipe 18. At this time, the air supplied to the air supply pipe 18 is in a state in which the block 17 directly above is in contact with the core mold 2 and the air guide groove 17c is closed. Never reach during.

When the mold opening is completed, the ejector plate 8 is raised by a plate moving mechanism (not shown). At this time, since the second ejector pin 7b and the third ejector pin 7c are fixed to the ejector plate 8, the ejector plate 8 and the ejector plate 8 ascend at the same time. On the other hand, when the ejector plate 8 rises, the first ejector pin 7a receives the contact plate 12 provided at the lower end of the first ejector pin 7a in the recess 11a of the ejector support member 11, so that the contact plate 12 is It does not rise until it comes into contact with the bottom of the recess 11a or the balance adjusting screw 13. As a result, the first ejector pin 7a is delayed in the start timing of rising as compared with the second ejector pin 7b and the third ejector pin 7c, and only the outer peripheral portion of the molded product 16 on the right side in the drawing is the second ejector pin 7a. It is pushed up by the block 17 directly above and the third ejector pin 7c on the connector 7b to be peeled off from the core mold 2. Further, when the block 17 immediately above is raised as the second ejector pin 7b is moved up, Since the block 17 separates from the core mold 2, the air supplied to the air guide groove 17c via the air supply pipe 18 is supplied while the molded product 16 and the core mold 2 are separated. It will be. The air supplied from the right side (one side) in the figure of the outer peripheral portion of the joint surface resists the sealing force acting on the joint surface between the molded product 16 and the core mold 2, and the inner periphery of the joint surface. The left side (the other side) in the figure of the portion and the outer peripheral portion is reached, and the molded product 16 and the core mold 2 are completely separated.

Further, in the air guide groove 17c into which air is press-fitted between the molded product 16 and the core mold 2, the side surface 17a on which the air guide groove 17c is formed has a predetermined angle of 10 ° or the like with respect to the bottom surface. The inclination angle (obtuse angle with respect to the upper surface of the core mold 2) is set. Therefore, the air flowing between the molded product 16 and the core mold 2 along the air guide groove 17c flows in the inner peripheral direction of the molded product 16. As a result, air is forced to flow from the block 17 side, which is one side of the molded product 16, to the first ejector pin 7a side, which is the other side, so that the molded product 16 is more easily peeled and peeled. This will reduce the time required for.

After that, the first ejector pin 7a that abuts the bottom of the recess 11a or the balance adjusting screw 13 due to the rise of the ejector plate 8 rises after being delayed to the second ejector pin 7b and the third ejector pin 7c. This means that the molded product 16 is pushed up above the core mold 2 by all the ejector pins 7a ... 7b ... 7c. At this time, since the molded product 16 is completely separated from the core mold 2 by the air, the molded product 16 hardly bends. Then, the molded product 16 is taken out from the molding device by a conveying means (not shown).

As described above, in the molded product releasing apparatus of this embodiment, the molded product 16 that is in close contact with the core mold 2 is pushed through the first to third ejector pins 7a ... 7b ... 7c. When it is lifted and peeled off from the core mold 2, one side of the outer peripheral portion of the molded product 16 is pushed up by the first ejector pin 7a prior to the other side to be peeled off, and a block immediately above this peeled portion. Air is supplied through 17 and an air supply pipe 18.

As a result, the air supplied to the peeled portion on one side of the outer peripheral portion of the molded product 16 resists the sealing force acting on the bonded surface between the molded product 16 and the core mold 2, and the inside of the bonded surface is prevented. Since it reaches the other side of the peripheral portion and the outer peripheral portion, the molded product 16 and the core mold 2 are completely separated. Therefore, according to the molded product releasing apparatus of the present embodiment, even if the arrangement positions of the first to third ejector pins 7a ... 7b ... 7c ... Are limited to the outer peripheral portion of the molded product 16, The product 16 can be easily separated from the core mold 2. Further, since the entire molded product 16 is pushed up after being completely peeled off, the flexure of the molded product 16 can be suppressed to a minimum, and as a result, it is possible to prevent the deformation and damage due to the flexure.

[0040]

[Effect of device]

 As described above, the device for releasing a molded product according to the first aspect of the present invention pushes up a molded product, which is in close contact with the molding die, through the push-up member and separates it from the molding die. A push-up delay means for delaying the push-up timing of the push-up member arranged on the other side of the push-up member arranged on one side of the outer peripheral portion, and an air supply means for supplying air to the separated portion. It is a structure having.

As a result, the air supplied to the peeled portion on one side of the outer peripheral portion of the molded product resists the sealing force acting on the joint surface between the molded product and the molding die, and Since it reaches the other side of the outer periphery and completely separates the molded product from the mold, the molded product can be easily removed from the mold even when the placement position of the push-up member is limited to the outer periphery of the molded product. Can be peeled off. Further, since the entire molded product is pushed up after being completely peeled off, the bending of the molded product can be suppressed to a minimum, and as a result, it is possible to prevent the deformation and damage due to the bending.

As described above, in the molded product releasing apparatus according to the invention of claim 2, the air supply means according to claim 1 is provided on the push-up member arranged on one side, and the molded product contacts the upper surface. In addition to being in contact with each other, it has a block directly above which air is supplied to the side surface on the inner peripheral side, and the side surface is set to an obtuse angle with respect to the joint surface between the molding die and the molded product. is there.

As a result, in addition to the effect of claim 1, air flows along the side surface having an obtuse angle with respect to the joint surface between the molding die and the molded product, so that the outer peripheral portion of the molded product is The flow direction of the air supplied to the separated portion on one side has a flow direction from one side to the other side. Therefore, the air is forced to flow from one side of the outer peripheral portion of the molded product to the other side, so that the molded product can be peeled off more easily and the time required for peeling can be shortened. Has the effect of becoming.

Further, as described above, the molded product release apparatus according to the third aspect of the present invention is configured such that the block directly above the second aspect has the runner gate that causes a step on the upper surface. .

Thus, in addition to the effect of claim 2, when the end of the molded product is molded into the shape of a runner gate, the molded product is molded when the molded product is pushed up by the block and the air and peeled off. It is possible to prevent the mold from falling off.

Further, in the molded product releasing apparatus of the invention of claim 4, as described above, the push-up delay means of claim 1 fixes and supports the push-up member arranged on one side, and The push-up member arranged on the other side is movably supported in the push-up direction, and the push-up plate that moves in the push-up direction moves together with the push-up plate, and after the push-up plate moves a predetermined distance in the push-up direction, And a contact support member that contacts the push-up member arranged on one side and moves in the push-up direction.

As a result, the air supplied to the peeled portion on one side of the outer peripheral portion of the molded product resists the sealing force acting on the joint surface between the molded product and the molding die, and Since it reaches the other side of the outer periphery and completely separates the molded product from the mold, the molded product can be easily removed from the mold even when the placement position of the push-up member is limited to the outer periphery of the molded product. Can be peeled off. Further, since the entire molded product is pushed up after being completely peeled off, the bending of the molded product can be suppressed to a minimum, and as a result, it is possible to prevent the deformation and damage due to the bending.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vertical cross section of a molding apparatus provided with a molded product release apparatus of the present invention.

FIG. 2 is a plan view showing a part of the above-mentioned molding apparatus with a part thereof omitted.

FIG. 3 is an explanatory diagram showing the operation of the molded product release apparatus when a molded product is created.

FIG. 4 is an explanatory diagram showing the operation of the molded product release apparatus after the molded product is created.

FIG. 5 shows a conventional example and is an explanatory diagram showing an operation of a molded product release apparatus at the time of creating a molded product.

[Explanation of symbols]

 1 Cavity Mold 2 Core Mold 3 Mounting Plate 4 Supporting Member 5 First Plate 6 Second Plate 7a First Ejector Pin (Pushup Member) 7b Second Ejector Pin (Pushup Member) 7c Third Ejector Pin (Pushup Member) 8 Ejector plate 9 Support pin 11 Ejector support member (contact support member) 11a Recess 12 Contact plate 13 Balance adjustment screw (contact support member) 14 Backup pin 15 Cavity part 16 Molded product 17 Direct block (air supply means) 17d Runner Gate 18 Air supply piping

Claims (4)

[Scope of utility model registration request] 1. A molded product releasing apparatus for pushing up a molded product, which is in close contact with a molding die, through a push-up member to separate it from the molding die, wherein a push-up device is arranged on one side of an outer peripheral portion of the molding product. A molded article characterized by having push-up delay means for delaying the push-up timing of the push-up member arranged on the other side of the push-up timing of the member, and air supply means for supplying air to the peeled portion. Mold release device. 2. The above-mentioned air supply means is provided on a push-up member arranged on one side, and has a block directly above which a molded product abuts on the upper surface and air is supplied to the inner peripheral side surface. 2. The molded product releasing apparatus according to claim 1, wherein the side surface is set to an obtuse angle with respect to the joint surface between the molding die and the molded product. 3. The molded product releasing apparatus according to claim 2, wherein the block immediately above has a runner gate that causes a step on the upper surface. 4. The push-up delay means fixes and supports a push-up member arranged on one side, and movably supports a push-up member arranged on the other side in the push-up direction and moves in the push-up direction. The push-up plate and the push-up plate move together, and after the push-up plate has moved a predetermined distance in the push-up direction,
The molded product release apparatus according to claim 1, further comprising a contact support member that contacts the push-up member disposed on the one side and moves in the push-up direction.