JP7398088B2 - Molding equipment, mold, and ejection method - Google Patents

Description

The present invention relates to a molding device, a mold, and a method for taking out the mold.

For example, Patent Document 1 discloses a foam molding device for molding a foam molded product with an undercut inside using a foam mold having an undercut mold, the undercut mold being perpendicular to the drawing direction. Foaming is characterized in that the undercut mold is swingable around an axis in the direction of foaming as a fulcrum, and the undercut mold is oscillated so that the front side in the punching direction serves as a fulcrum and the back side in the punching direction points toward the center of the foam molded product. A molded article forming apparatus is disclosed.

Japanese Patent Application Publication No. 2005-231055

An object of the present invention is to provide a molding device, a mold, and a removal method that can improve the efficiency of molding operations.

The molding apparatus according to the present invention includes a first mold member that molds the inner shape of the molded product, and a region adjacent to a molding region of the first mold member that molds the inner shape of the molded product. a second mold member and a connection that is thinner than the first mold member in a direction orthogonal to the take-out direction of the first mold member, and connects the first mold member and the second mold member; The distance between the first mold member and the second mold member changes in the direction in which the first mold member is taken out.

Preferably, the method further includes a distance changing part that changes the distance between the first mold member and the second mold member in the direction of taking out the first mold member, and the distance changing part changes the distance between the first mold member and the second mold member. The latter first mold member is located outside the molded product, and the connecting member is exposed from the first mold member moved by the distance changing section, and the first mold member and The second mold member is connected.

Preferably, the molded product is a pipe material with different diameters, the first mold member molds the inner shape of the small diameter side of the molded product, and the second mold member molds the inner shape of the molded product. The inner shape including the enlarged diameter part that expands from the small diameter side to the large diameter side is molded.

Moreover, the molding die according to the present invention includes a first mold member that molds the inner shape of the molded product, and a region adjacent to a region to be molded by the first mold member that molds the inner shape of the molded product. A second mold member to be molded and a member that is thinner than the first mold member in a direction perpendicular to the direction of taking out the first mold member, and connects the first mold member and the second mold member. The distance between the first mold member and the second mold member changes in the direction in which the first mold member is taken out.

In addition, the taking-out method according to the present invention includes a first mold member that molds the inner shape of the molded product, and a region adjacent to the region to be molded by the first mold member, which molds the inner shape of the molded product. A second mold member to be molded and a member that is thinner than the first mold member in a direction perpendicular to the direction of taking out the first mold member, and connects the first mold member and the second mold member. A method for taking out a mold having a connecting member from the molded product, the first mold member being taken out from the inside of the molded product after the inner shape of the molded product is molded, and the first mold member being removed from the inside of the molded product. and a step of taking out the second mold member from inside the molded product while tilting the molded product.

According to the present invention, it is possible to improve the efficiency of the molding operation.

5 is a diagram illustrating a molded product 5. FIG. FIG. 2 is a diagram illustrating the molding device 1 during mold opening in this embodiment. It is a figure which illustrates the molding apparatus 1 at the time of mold closing in this embodiment. FIG. 2 is a diagram illustrating the molding apparatus 1 in detail when the mold is closed. FIG. 2 is a diagram illustrating in detail the molding device 1 when the mold is opened. FIG. 2 is a perspective view illustrating the mold 2 when the mold is closed. 7 is a perspective view illustrating in detail a first mold member 202 in the internal shape mold 20 illustrated in FIG. 6. FIG. 8 is a perspective view illustrating the operation of the first mold member 202 illustrated in FIG. 7. FIG. It is a flowchart explaining the extraction method (S10) in this embodiment. 5 is a diagram illustrating a process of taking out a first mold member 202 from inside the molded product 5. FIG. 5 is a diagram illustrating a process of taking out a second mold member 204 from inside the molded product 5. FIG. It is a figure explaining the conventional internal shape mold in the mold of a molding apparatus, and the removal method.

First, with reference to FIG. 1, a molded product 5 molded by the molding apparatus 1 of this embodiment will be described.
FIG. 1 is a diagram illustrating a molded product 5. As shown in FIG. FIG. 1(A) is a front view and a sectional view illustrating a stepped molded product 5, and FIG. 1(B) is a front view and a sectional view illustrating a straight pipe molded product 5.
As illustrated in FIG. 1, the molded product 5 includes a molded product with one end closed, and a cylindrical or tubular molded product. Examples of molded products with one end closed include bottles, jars, and jars. Furthermore, examples of the molded product having a cylindrical or tubular shape include a tube material. Note that the molded product 5 of this example is a tube material. The molded product 5 is a pipe material molded from a synthetic resin, and specifically, a model (styrene foam model) of a pipe material molded from a foamable synthetic resin material. The molded product 5 is a vanishing mold used for vanishing model casting. Further, the shape of the molded product 5 is, for example, a straight pipe shape or a shape with different diameters. The molded product 5 of this example has a shape with different diameters, specifically a concentric reducer type shape with different diameters. The molded product 5 includes an upper tube portion 52 having a cylindrical shape, and a tapered tube portion 53 formed to gradually expand from the upper tube portion 52 toward the lower tube portion 54 in a direction orthogonal to the axial direction of the molded product 5. , a cylindrical lower tube portion 54 provided continuously below the tapered tube portion 53 , and a rectifying blade 57 erected on the inner wall surface of the tapered tube portion 53 and inclined with respect to the axial direction of the molded product 5 and has. In addition, the molded product 5 may be of a stepped type in which stepped portions 55 are provided at the openings of the upper tube portion 52 and the lower tube portion 54, as illustrated in FIG. This includes the straight pipe type illustrated in .

Next, with reference to FIG. 12, a conventional internal shape mold 20 for molding the inside of the molded product 5 and a method for taking it out will be described.
FIG. 12 is a diagram illustrating a conventional internal shape mold in a mold of a molding apparatus and a method for taking it out.
As illustrated in FIG. 12, the molds of the conventional molding apparatus include an external shape mold (not shown) that molds the outside shape of the molded product 5, and an internal shape mold that molds the inside shape of the molded product 5. It has a mold 20. The conventional internal shape mold 20 includes an upper intermediate mold 200 and a lower intermediate mold 210 including a first mold member 202 and a second mold member 204.
The first mold member 202 molds the internal shape of the upper tube part 52 of the molded product 5, and the second mold member 204 molds the internal shape of a part of the tapered pipe part 53 of the molded product 5 and the rectifying blades 57. do. The first mold member 202 and the second mold member 204 are detachably connected. Further, the lower intermediate mold 210 molds the internal shapes of the tapered tube portion 53 and the lower tube portion 54 of the molded product 5.
Now, to explain the conventional method for taking out the internal shape mold 20, as illustrated in FIG. is connected to. Next, as illustrated in FIG. 12(B), the first mold member 202 and the lower intermediate mold 210 move from the inside of the molded product 5 to the outside after molding the molded product 5. At this time, when the second mold member 204 is moved while connected to the first mold member 202, it comes into contact with the inner wall surface of the molded product 5, so the second mold member 204 is separated from the first mold member 202 and molded. It is necessary to leave it inside the product 5. Next, as illustrated in FIG. 12(C), the operator manually moves the second mold member 204 from inside the molded product 5 while changing the direction of the second mold member 204 so as not to hit the inner wall surface of the molded product 5. The mold member 204 is taken out.
As described above, in the conventional method for taking out the internal shape mold 20, it was necessary to separate the second mold member 204 and leave it inside the molded product 5, and to take out the remaining second mold member 204 separately by hand. . This allows the operator to take out the second mold member 204 that has remained inside the molded product 5 and reattach the second mold member 204 to the first mold member 202 in order to perform the next molding operation. It was necessary to do this. Moreover, by performing these operations, there was a risk of damaging the molding surface of the second mold member 204.

Therefore, according to the embodiment of the present invention, the first mold member 202 can be moved from the inside of the molded product 5 to the outside with the second mold member 20 fixed inside the molded product 5, and the first mold member 202 can be moved from the inside of the molded product 5 to the outside. The member 202 and the second mold member 20 are integrally constructed so as not to be separated.
As a result, the work of manually taking out the second mold member 204 from the molded product 5 and the work of attaching the taken out second mold member 204 to the first mold member 202 are omitted, and the molded product 5 can be molded efficiently. Can be done. The configuration of the molding apparatus according to the embodiment of the present invention will be specifically described below with reference to the drawings.

Next, with reference to FIGS. 2 and 3, the outline of the molding apparatus 1 in this embodiment will be explained.
FIG. 2 is a diagram illustrating the molding apparatus 1 during mold opening in this embodiment.
FIG. 3 is a diagram illustrating the molding apparatus 1 when the mold is closed in this embodiment.
As illustrated in FIGS. 2 and 3, the molding device 1 of the present embodiment is a molding device that molds a molded product 5, and specifically, a molding device that molds a fugitive mold used for vanishing model casting. be. The molding device 1 includes a mold 2 for molding a molded product 5, and a frame 3 for supporting the mold 2 and moving it in a predetermined direction.

The mold 2 includes an external shape mold 10 that molds the outside shape of the molded product 5 and an internal shape mold 20 that molds the inside shape of the molded product 5.
The external shape mold 10 includes a first external shape mold 100 and a second external shape mold 110. The first external shape mold 100 and the second external shape mold 110 have molding surfaces 100A and 110A for molding the outer shape of the molded product 5, respectively. The molding surfaces 100A and 110A are molding surfaces for molding the outer shapes of the upper tube portion 52, the tapered tube portion 53, and the lower tube portion 54 of the molded product 5.

Further, the internal shape mold 20 has an upper intermediate mold 200 and a lower intermediate mold 210, and the upper intermediate mold 200 includes a first mold member 202, a second mold member 204, a connecting member 206, and a distance changing part. 207. Details of the upper intermediate mold 200 will be described later, but the first mold member 202 has a molding surface 202A that molds the inner shape of the upper tube part 52 of the molded product 5, and the second mold member 204 has a molding surface 202A that molds the inner shape of the upper tube portion 52 of the molded product 5. It has a molding surface 204A that molds the inner shape of the tapered tube portion 53. Moreover, the connecting member 206 is inserted into the inside of the first mold member 202 and connects the second mold member 204.
Further, the lower intermediate mold 210 has a lower mold main body 212. The lower mold main body 212 has a molding surface 212A that molds the inner shape of the tapered tube portion 53 and the lower tube portion 54 of the molded product 5.

The frame 3 includes a fixed frame 300, a movable frame 310, and an intermediate frame 320. Bearings 342A and 342B are provided in the fixed frame 300 and the movable frame 310, and the guide shaft 340 is inserted through the provided bearings 342A and 342B. Further, the guide shaft 340 is also inserted through the mold holding part 230 that is located between the fixed frame 300 and the movable frame 310 and holds the upper intermediate mold 200. Thereby, as illustrated in FIG. 3, the upper intermediate mold 200 and the movable side frame 310 can reciprocate in the left-right direction in FIG. 2 using the guide shaft 340 as a guide.
The fixed side frame 300 fixes and holds the first external shape mold 100 via a steam chamber (not shown) for heating the first external shape mold 100 with steam heat.
The moving frame 310 fixes and holds the second external shape mold 110 via a steam chamber (not shown) for heating the second external shape mold 110 with steam heat. The movable frame 310 is configured to be able to reciprocate in the axial direction of the guide shaft 340 with respect to the fixed frame 300.
The intermediate mold frame 320 is provided in a direction perpendicular to the fixed side frame 300, and fixes and holds the lower intermediate mold 210 at a predetermined position via the fixing base 216 of the lower intermediate mold 210. A hydraulic cylinder 218 that expands and contracts in the vertical direction in FIG. 1 is connected to the fixed base 216, and the intermediate die frame 320 is provided with a through hole through which the piston rod 218A of the hydraulic cylinder 218 is inserted.

Next, with reference to FIGS. 4 to 6, the mold 2 in the molding apparatus 1 of this embodiment will be described in detail.
FIG. 4 is a diagram illustrating the molding apparatus 1 in detail when the mold is closed.
FIG. 5 is a diagram illustrating the molding apparatus 1 in detail when the mold is opened.
As illustrated in FIGS. 4 and 5, the internal shape mold 20 includes an upper intermediate mold 200 and a lower intermediate mold 210. The upper intermediate mold 200 includes a first mold member 202 , a second mold member 204 , a connecting member 206 , and a distance changing portion 207 .

The first mold member 202 is a mold member that molds the inner shape of the upper tube portion 52, which is the small diameter side of the molded product 5. The first type member 202 has a cylindrical shape and includes a through hole 2020 bored in the axial direction. The through hole 2020 is large enough to allow the connection member 206 to be inserted therein. Note that the first mold member 202 illustrated in FIGS. 4 and 5 is shown so that the connecting member 206 is visible for convenience of explaining the inside of the first mold member 202.

The second mold member 204 is a member thinner than the first mold member 202, and is a mold member for molding the inner shape of the tapered pipe portion 53 of the molded product 5 and the rectifying blades 57. The second mold member 204 molds the inner shape of the molded product 5 at a position adjacent to the first mold member 202 . That is, the second mold member 204 molds the inner shape of the molded product 5 at a position adjacent to the first mold member 202 . In other words, the second mold member 204 molds a region adjacent to the region molded by the first mold member 202. That is, the second mold member 204 molds the inner shape of the molded product 5 in a region adjacent to the region molded by the first mold member 202 .

The connecting member 206 is a member that is thinner than the first mold member 202 in the direction perpendicular to the direction in which the first mold member 202 is taken out, and is a rod that connects the second mold member 204 below the first mold member 202. . The connecting member 206 has a cylindrical cross-sectional shape and is formed in a thickness that allows it to be inserted into the through hole 2020 of the first mold member 202. The connecting member 206 has one end connected to the second mold member 204 and the other end connected to the mold holder 230.

The distance changing unit 207 is a moving function module that moves the first mold member 202 from the inside of the molded product 5 to the outside. The distance changing unit 207 of this example has a hydraulic cylinder 208, and a piston rod 208A of the hydraulic cylinder 208 is connected to the first mold member 202. By expanding and contracting the piston rod 208A of the hydraulic cylinder 208 in the vertical direction in FIGS. 4 and 5, the first mold member 202 is moved in the vertical direction. Specifically, the distance changing unit 207 moves the first mold member 202 upward by contracting the piston rod 208A, and moves the first mold member 202 downward by extending the piston rod 208A. . That is, the distance changing unit 207 changes the distance between the first mold member 202 and the second mold member 204 in the direction in which the first mold member 202 is taken out. The distance changing unit 207 of this example changes the inner shape of the molded product 5 from the inside to the outside by contracting the piston rod 208A and moving the first mold member 202 upward after molding the inner shape of the molded product 5. The type 1 member 202 is moved. That is, the distance changing unit 207 separates the adjacent first mold member 202 and second mold member 204 from the contact state.

Further, the lower intermediate mold 210 includes a lower mold main body 212, a fitting portion 214, and a groove portion 215.
The lower mold main body 212 is a mold member that molds the inner shapes of the tapered tube portion 53 and the lower tube portion 54 of the molded product 5. Further, the lower die main body 212 is provided with a fitting portion 214 at a position where the inner shape of the tapered tube portion 53 of the molded product 5 is formed.
The fitting portion 214 is a recessed portion that fits into the second mold member 204 when the mold for molding the molded product 5 is closed.
The groove portion 215 is a groove formed between the second mold member 204 and the lower mold body 212 when the second mold member 204 is fitted into the fitting portion 214. In the groove portion 215 , a rectifying blade 57 that is inclined with respect to the axial direction of the molded product 5 is formed on the inner wall surface of the tapered tube portion 53 of the molded product 5 .

Next, the operation of the mold 2 in the molding apparatus 1 of this embodiment will be described with reference to FIGS. 6 to 8.
FIG. 6 is a perspective view illustrating the mold 2 when the mold is closed. Note that, for convenience of explanation, the fixed side frame 300, intermediate die frame 320, and guide shaft 340 illustrated in FIG. 2 are excluded.
FIG. 7 is a perspective view illustrating in detail the first mold member 202 in the internal shape molding die 20 illustrated in FIG.
FIG. 8 is a perspective view illustrating the operation of the first mold member 202 illustrated in FIG. 7.
As illustrated in FIG. 6, the mold 2 can have, for example, three internal shape molds 20 arranged therein. For convenience of explanation, the three internal shape molds 20 will be referred to as internal shape molds 20L, 20M, and 20N, respectively, but will be referred to as the internal shape mold 20 when there is no particular need to distinguish them. The mold 2 can obtain a plurality of molded products 5 in one molding process by arranging a plurality of internally shaped molds 20.
In addition, as illustrated in FIG. 7, the first mold member 202L of the internal shape mold 20L is the first mold member 202M of the internal shape mold 20M and the first mold member 202M of the internal shape mold 20N, although not shown. The molding surface 202A is different from the mold member 202N. Specifically, the molding surface 202AM of the first mold member 202M has a stepped portion, and can mold a stepped molded product 5. Further, the molding surface 202AN of the first mold member 202N has a cylindrical shape, and can mold a straight pipe molded product 5. Thereby, molded products 5 of different shapes can be obtained by one molding.
Further, as illustrated in FIG. 8, after molding the molded product 5, these first mold members 202 are moved upward and stored in the mold holder 230. As a result, the connecting member 206 is exposed from the first mold member 202 like the connecting member 206L of the internal shape mold 20L.
In this way, the internal shape mold 20 has the first mold member 202 and the second mold member 204 integrally configured, and even if the first mold member 202 is moved from the inside to the outside of the molded product 5, A second mold member 204 can be secured inside the molded product 5.

Next, a method for taking out the internal shape mold 20 will be explained.
FIG. 9 is a flowchart illustrating the extraction method (S10) in this embodiment.
FIG. 10 is a diagram illustrating a process of taking out the first mold member 202 from inside the molded product 5. As shown in FIG.
FIG. 11 is a diagram illustrating a process of taking out the second mold member 204 from inside the molded product 5.
This extraction method is performed after molding the molded product 5, and the internal shape mold 20 is taken out from inside the molded product 5. First, to explain the outline of the present extraction method, in step 100, the operator moves the lower intermediate mold 210 downward and takes out the lower intermediate mold 210 from inside the molded product 5 . After taking out the lower intermediate mold 210, the moving side frame 310 and the intermediate mold frame 320 are moved to the right along the guide shaft 340 (see FIGS. 2 and 3). In step 102, the operator moves the first mold member 202 upward and takes out the first mold member 202 from inside the molded product 5 (see FIG. 5). In step 104, the operator holds the molded product 5 in his hand and removes the rectifying blade 57 from the second mold member 204 while tilting and rotating the molded product 5 held in his hand. In step 106, the operator moves the molded product 5 held in his hand downward and takes out the second mold member 204 and the connecting member 206 from inside the molded product 5.

Hereinafter, the steps S100 to S106 illustrated in FIG. 9 will be described in detail with reference to FIGS. 10 and 11.
In step 100, the operator retracts the piston rod 218A of the hydraulic cylinder 218, moves the lower intermediate mold 210 illustrated in FIG. 10(A) downward, and moves it from the inside of the molded product 5 to the outside. That is, the lower intermediate mold 210 is taken out from inside the molded product 5. Thereby, the state shifts from FIG. 10(A) to the state shown in FIG. 10(B). Next, after taking out the lower intermediate mold 210, the operator moves the moving side frame 310 and the intermediate mold frame 320 to the right along the guide shaft 340, as illustrated in FIG. Thereby, the first external shape mold 100 and the second external shape mold 110 are separated from the molded product 5.

In step 102, the operator retracts the piston rod 208A of the hydraulic cylinder 208 included in the distance changing section 207, moves the first mold member 202 illustrated in FIG. move it outward. That is, the first mold member 202 is taken out from inside the molded product 5. As a result, the first mold member 202 and the second mold member 204 go from being in contact to being separated from each other, and transition from the state shown in FIG. 10(B) to the state shown in FIG. 10(C). In the state shown in FIG. 10C, the connecting member 206 is exposed from the first mold member 202 that has been moved by the distance changing unit 207. A gap 800 can be provided between the connecting member 206 and the inner wall surface of the opening of the upper tube portion 52 in the molded product 5. At this time, the second mold member 204 and the connecting member 206 are located inside the molded product 5 and are located below the first mold member 202 in the direction in which the first mold member 202 is taken out.

In step 104, as illustrated in FIG. 11(D), the operator tilts and rotates the molded product 5 held in the hand while utilizing the gap 800, and removes the rectifying blade from the second mold member 204. Remove 57. At this time, if an undercut exists in the rectifying blade 57, the operator removes the second mold member 204 so as not to damage the inner wall surface of the molded product 5 or the rectifying blade 57. Thereby, the state shifts from FIG. 11(D) to the state shown in FIG. 11(E).

In step 106, the operator moves the molded product 5 held in his hand downward while tilting it, and takes out the second mold member 204 and the connecting member 206 from inside the molded product 5.
As described above, according to the extraction method of the present embodiment, a gap 800 large enough to tilt and rotate the molded product 5 can be provided between the connecting member 206 and the inner wall surface of the molded product 5. The internal shape mold 20 can be taken out without damaging the inner wall surface of the molded product 5 or the rectifying blades 57.

As explained above, according to the molding apparatus 1 in this embodiment, the first mold member 202 and the second mold member 20 are integrally configured so as not to be separated, and the first mold member The second mold member 20 is configured to remain inside the molded product 5 even if the mold member 202 is moved. Thereby, the work of taking out the second mold member 204 from the molded product 5 and the work of attaching the taken out second mold member 204 to the first mold member 202 can be omitted, and the molded product 5 can be molded efficiently. .
In addition, by making the connecting member 206 thinner than the first mold member 202 that molds the inner wall surface near the opening of the molded product 5, a gap 800 that allows the molded product 5 to tilt and rotate is created between the connecting member 206 and the connecting member 206. It can be provided between the molded product 5 and the inner wall surface thereof. Thereby, the second mold member 204 and the connecting member 206 can be taken out while tilting and rotating the molded product 5.

1... Molding device 2... Molding mold 5... Molded product 10... External shape mold 100... First external shape mold 110... Second external shape mold 20... Internal shape mold 200... Upper intermediate mold 202... First mold Member 204...Second mold member 206...Connecting member 207...Distance changing part 210...Lower intermediate mold 212...Lower mold main body 214...Fitting part 215...Groove part

Claims (5)

a first mold member that molds the inner shape of the molded product;
a second mold member that molds the inner shape of the molded product in a region adjacent to the molding region of the first mold member;
a member that is thinner than the first mold member in a direction perpendicular to the direction in which the first mold member is taken out, and a connecting member that connects the first mold member and the second mold member;
In the removal direction of the first mold member, the distance between the first mold member and the second mold member changes ,
The connecting member is exposed between the first mold member and the second mold member when the first mold member moves in the removal direction,
In the step of taking out the second mold member from inside the molded product, the first mold member is located outside the molded product, and the second mold member and the connecting member are located inside the molded product.
Molding equipment. further comprising a distance changing unit that changes the distance between the first mold member and the second mold member in the direction of taking out the first mold member;
The first mold member after being changed by the distance changing unit is located outside the molded product,
The molding device according to claim 1, wherein the connecting member connects the first mold member and the second mold member while being exposed from the first mold member moved by the distance changing section. The molded product is a pipe material with different diameters,
The first mold member molds the inner shape of the small diameter side of the molded product,
The molding apparatus according to claim 2, wherein the second mold member molds the inner shape of the molded product including an enlarged diameter portion that expands from a small diameter side to a large diameter side. a first mold member that molds the inner shape of the molded product;
a second mold member that molds the inner shape of the molded product in a region adjacent to the molding region of the first mold member;
a member that is thinner than the first mold member in a direction perpendicular to the direction in which the first mold member is taken out, and a connecting member that connects the first mold member and the second mold member;
In the removal direction of the first mold member, the distance between the first mold member and the second mold member changes ,
The connecting member is exposed between the first mold member and the second mold member when the first mold member moves in the removal direction,
In the step of taking out the second mold member from inside the molded product, the first mold member is located outside the molded product, and the second mold member and the connecting member are located inside the molded product.
Molding mold. a first mold member that molds the inner shape of the molded product;
a second mold member that molds the inner shape of the molded product in a region adjacent to the molding region of the first mold member;
a connecting member that is thinner than the first mold member in a direction perpendicular to a direction in which the first mold member is taken out, and connects the first mold member and the second mold member; A method for taking out the molded product, the method comprising:
After molding the inner shape of the molded product, take out the first mold member from the inside of the molded product, and remove the connecting member exposed between the first mold member and the second mold member. , a step of creating a gap between the inner wall surface of the molded product;
A method for taking out the second mold member from inside the molded product while tilting the molded product using a gap between the connecting member and the molded product .

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