JP4965181B2 - Molding device for spherical mold - Google Patents

Description

  The present invention relates to a molding apparatus for manufacturing a mold for molding a sphere, and more particularly to a molding mold suitable for manufacturing a molding mold for a sphere having an undercut.

As prior art document information related to the present invention, for example, there is the following Patent Document 1.
JP 2002-346003 A (see 0030, 0032, FIG. 10)

The invention described in Patent Document 1 as an example includes a central core that forms the center region, a pair of outer cores that form the outer region outside the joint (undercut portion), and a gap between the joints and It consists of a pair of side cores that mold both side regions of the central core, and each of these cores is clamped in conformity to form a convex hemispherical molding die.
Further, when removing the mold, after the central core is retracted, the pair of outer cores and the pair of side cores are inclined inward and close to each other in the radial direction. By moving in the direction, each core can be demolded without interfering with the undercut formed on the molding surface of the molded mold.

By the way, the structure of moving the pair of outer cores and the pair of side cores in Patent Document 1 illustrated in the illustrated example in a demolding direction allows the core moving tool including the cylinder and the piston rod to be moved into the pair of outer cores. Each core has a total of four cores, a core and a pair of side cores. Each core is moved by operating the core moving tool, and each core and the core moving tool are supported. The first moving mold and the second moving mold that supports the molded mold are moved in opposite directions to remove the mold.
As a result of earnest research, the present inventors have arrived at the present invention from the viewpoint of demolding each core without interfering with the undercut formed on the molding surface of a mold molded with a simpler structure. Is.

An object of the present invention is to quickly demold each core without interfering with an undercut formed on a molding surface of a mold molded with a simple structure, and to solve this problem, a spherical mold An object is to provide a mold forming apparatus.

In order to achieve the above object, the technical means adopted by the present invention is such that a pair of facing mold parts are clamped by contact with each other and opened by separating, and one mold is used. The center part molding the center part in the molding die for a sphere having an undercut in the part, and the mold is clamped so as to surround the center part core, and the part moves toward the center part core and is undercut. In a molding die for a sphere in which at least two or more side cores are removed from the mold,
The one mold part includes a first mold part that supports the central core and a second mold part that supports the side core, and the first mold part and the second mold part include: The second mold part is provided with a movement restricting pin that fits into the first mold part and restricts the movement of the first mold part in the demolding direction. When the first mold part is moved in the direction to remove the mold, the first mold part and the second mold part are separated from each other, but the movement restricting pin causes the first mold part to be separated. When the first mold part is further moved in the demolding direction at the time of being restricted, the second mold part is moved in the demolding direction along with the movement, and the first mold part and the second mold part are moved. mold portion is the central portion core and the side core and the clamping by approaching, with mold is opened by separating, under the side core is formed It is to have the molding device of the sphere for forming mold, characterized in that from Tsu bets are to be demolded.

  The form of the at least two side cores is, for example, a form in which the side cores face each other in one direction, a pair of side cores facing in one direction, and the side cores And two pairs of side cores facing each other in the crossing direction, further three or more side cores, etc., corresponding to the form of the undercut in the spherical mold May be selected as appropriate.

For example, in the case of a molding apparatus for molding a spherical mold for molding a soft baseball, an undercut is formed in a portion corresponding to the seam of the baseball, and therefore the side core is A pair of first side cores formed with fitting recesses that fit in a direction so as to surround the central core, and face the first side core in the crossing direction and A pair of second side cores formed with mating surfaces matching the mating surfaces of the first side cores, and undercut along the edges of the mating surfaces of these side cores It is preferable to form the part.
In the case of this form of the spherical mold, as a preferred form of the mold clamping form of the central core and the side core, the side of the central core is tapered from the clamping position to the tip. And forming a fitting projection in a tapered shape at a portion facing the fitting recess of the first side core, while fitting the fitting recess with the fitting projection. It is preferable to form.

The center core and the side core are clamped when the two mold parts approach each other, and the mold clamping is released when they are separated from each other, and the side core is removed from the molded undercut. As a specific form, the first mold part is provided with the same number of side hooks as the side cores so as to incline in the center part core direction with fitting hooks that fit into the side cores in a clamped state. A fitting hole for fitting the fitting rod into the side core is provided so as to be inclined in the same direction as the inclination direction of the fitting rod, and the fitting is performed during the operation from the mold clamping state to the mold clamping release state. A form in which the joint is pulled out from the fitting hole while applying a force in a direction to move the side core toward the central core with respect to the fitting hole.
As another specific form, the first mold part is provided with a connecting rod provided in the same number as the side cores so as to be swingable in a direction in contact with and away from the central core. A mode in which the connecting rod swings in a direction of moving the side core toward the central core during the operation from the mold clamping state to the mold clamping release state is described.

  According to the present invention, each core can be quickly removed with a simple structure without interfering with the undercut formed on the molding surface of the molded sphere molding die.

The best mode for carrying out a molding apparatus for a spherical mold according to the present invention will be described below with reference to the drawings.
In this embodiment, a molding apparatus of a form for forming a spherical mold for molding a mold for molding a soft baseball is illustrated, and the drawings are schematically shown.

The molding apparatus A according to this embodiment includes a convex movable mold 1 and a concave fixed mold 2. The movable mold 1 is clamped when the movable mold 1 comes into contact with the fixed mold 2, and the mold is opened when separated. It is what is done.
The movable mold 1 is clamped so as to surround the central core 3 that molds the central portion of the molding die for a sphere having an undercut, and the central core 3. A convex mold 1A comprising at least four side cores 4A, 4B, 5A, 5B that move in the direction and demold from the undercut is housed.
The movable mold 1 includes a first mold part 10 that supports the central core 3 and a second mold part 20 that supports the side cores 4A, 4B, 5A, and 5B. When the two mold parts approach, the central core 3 and the side cores 4A, 4B, 5A, 5B are clamped, and when separated, the side cores 4A, 4B, 5A, 5B become The mold is removed from the molded undercut.

The first mold part 10 and the second mold part 20 are always urged in a direction away from each other by a spring S disposed between the two mold parts, and move the first mold part 10 in the mold clamping direction. And the spring S contracts against the urging force, and the first mold part 10 contacts the second mold part 20 so that the mold parts move together in the mold clamping direction and are fixed. 2 is contacted.
Further, the second mold part 20 is fitted with a movement restricting pin 30 that fits the first mold part 10 and restricts the movement of the first mold part 10 in the demolding direction. When the first mold part 10 and the second mold part 20 are separated from each other by the spring S when moved in the demolding direction, the separation operation of the first mold part 10 is regulated by the movement regulating pin 30. Further, when the first mold part 10 moves in the mold release direction, the second mold part 20 moves in the mold release direction along with the movement.
Further, the fixed mold 2 is fixed so that a fixed position is maintained, and a concave mold 2A corresponding to the convex mold 1A is formed on a surface facing the convex mold 1A.

Hereinafter, the configuration of the convex mold 1A of this embodiment will be specifically described.
In the following description, the side cores 4A and 4B will be referred to as first side cores 4A and 4B, and the side cores 5A and 5B will be described as second side cores 5A and 5B.

The central core 3 constitutes the central part of the convex mold 1A, and the side part is tapered from the clamping position to the tip part, and the first side cores 4A and 4B described later are formed. A tapered fitting protrusion 31 having a shape that matches the fitting recess 41 is formed at a portion facing the fitting recess 41.
The first side cores 4A and 4B constitute the inside of the convex mold 1A, and are formed in a shape in which the above-described fitting recess 41 fits and fits with the fitting protrusion 31 ( 1 and 3).
The second side cores 5A and 5B constitute the outside of the convex mold 1A, and are formed in a shape that fits and contacts the outside of the first side cores 4A and 4B (see FIG. 4 to 6).
An undercut portion B1 is formed along the edge of the mating surface B in the central core 3, the first side cores 4A and 4B, and the second side cores 5A and 5B. In the clamped state, a shape corresponding to the seam of the baseball is formed (see FIG. 7).
The inner side of the convex mold 1A and the outer side of the convex mold 1A in FIG. 7 are the central part with the mating surface B between the first side cores 4A and 4B and the second side cores 5A and 5B as a boundary. The first side cores 4A and 4B located on the left and right of the core 3 are inside, and the second side cores 5A and 5B located on the top and bottom of the inside are outside.

The first side cores 4 </ b> A and 4 </ b> B are integrally provided with a slide plate 42 that is slidably inserted into a moving space 21 formed in the second mold part 20.
The slide plate 42 is directed in the direction of the moving space 21, that is, in the direction approaching the first mold part 10 from the outer side of the second mold part 20 toward the central core 3 as shown in FIGS. The first side cores 4A and 4B are removed from the formed undercut by sliding in the direction of the central core 3 along the moving space 21 formed so as to be inclined toward the center. .
Further, the slide plate 42 has a structure in which two fitting rods 43 supported by the first mold portion 10 so as to be located on both sides of the central core 3 as a boundary, and the slide plate 42, and the fitting rod 43 is fitted into the fitting hole 44 in the mold-clamping state, so that the mold-clamping state of the convex mold 1A is maintained, and the first mold part The fitting rod 43 comes out of the fitting hole 44 when 10 is separated from the second mold part.
Further, when the fitting rod 43 comes out of the fitting hole 44, a force for moving the fitting rod 43 in the direction of the center core 3 with respect to the fitting hole 44 acts. The slide plate 42 is configured to slide in the direction of the central core 3.

  A specific form of the fitting rod 43 and the fitting hole 44 that operate as described above will be described with reference to FIGS. 1 to 3. The fitting rod 43 is inclined toward the central core 3. The fitting hole 44 is opened so as to incline in the same direction as the inclination direction of the fitting rod 43.

According to this configuration, when the fitting rod 43 is fitted into the fitting hole 44 in the mold-clamping state, by applying a force that slides the slide plate 42 in the direction of the central core 3, The fitting state of the first side cores 4A and 4B with respect to the child 3 is maintained.
Also, when only the first mold part 10 moves in the mold releasing direction, the fitting rod 43 comes out of the fitting hole 44, and the inner side (the center core 3 side) near the tip of the fitting rod 43 is fitted. The slide plate 42 is slid in the direction of the central core 3 so as to push the peripheral surface of the inner hole 44 (on the central core 3 side) toward the central core 3.
At this time, since the central core 3 also moves in the mold release direction, a gap 22 is formed between the fitting protrusion 31 in the central core 3 and the fitting recess 41 in the first side cores 4A and 4B. As a result, the first side cores 4A and 4B move as the slide plate 42 slides, and are removed from the formed undercut.
That is, since the fitting rod 43 and the fitting hole 44 are inclined, the inner side of the fitting rod 43 near the tip is positioned closer to the central core 3 side than the inner edge of the fitting hole 44. When this occurs, the fitting rod 43 pushes the fitting hole 44 when the fitting rod 43 is fitted to and detached from the fitting hole 4, and this operation results in a mold-clamping state. While being held, the mold can be removed from the molded undercut (see FIG. 2).

Reference numeral 61 denotes an extrusion member that supports the second side cores 5A and 5B (see FIGS. 4 to 6).
The extruding member 61 includes an extruding plate 62 facing the first mold part 10 and a pulling member 63 that is stretched over the extruding plate 62 and the fixed mold 2 and moves the extruding plate 62 in the mold clamping direction. Then, by applying the pulling force of the pulling member 63, the second side cores 5A and 5B are moved in the mold clamping direction by approaching the first mold part 10.
Examples of the structure of the pulling member 61 include a cylinder structure and a chain structure.

Further, as shown in FIGS. 4 to 6, the second side cores 5A and 5B can swing in a direction in which the pusher plate 62 comes into contact with the central core 3 and in a direction in which the second side cores 5A and 5B leave. The two connecting rods 51 provided are connected.
The connecting rods 51 are located on both sides of the central core 3 as a boundary, and a swinging space 52 opened in the first mold part 10 and a second communicating so as to communicate with the swinging space 52. It is inserted into the oscillating space 53 opened in the mold part 20, and is slidably inserted into the slide space 54 opened in the second mold part 20 so as to communicate with the oscillating space. The second side cores 5A and 5B are connected to each other.
The slide space 54 is opened in a direction along the tapered shape of the central core 3.

The operation up to the mold clamping in the second side cores 5A and 5B is guided by the slide space 54, and the connecting rod 51 swings in the direction of the central core 3. The side cores 5A and 5B are moved in the direction of the central core 3 and the mating surface B of the second side cores 5A and 5B is pressed against the mating surface B of the first side cores 4A and 4B. The pressing force maintains the mold clamping state.
When the first mold part 10 is moved in the demolding direction from the mold clamping state, the central core 3 is moved in the demolding direction.
If the 1st type | mold part 10 is moved from this state, the 2nd type | mold part 20 will move to a demolding direction with the movement of the field 1 type | mold part 10 by the movement control means 30, and 2nd side core 5A, 5B will be shown. Is guided to the slide space 54 and removed from the undercut formed by swinging in the direction of the central core 3.
In the mold release operation from the undercut of the second side cores 5A and 5B, the entire movable mold 1 is moved away from the fixed mold 2, so that the product can be taken out by the mold release operation. .

As described above, according to the molding apparatus A of the present embodiment, the first side cores 4A and 4B and the second side cores 5A and 5B are removed by the normal mold release operation for separating the movable mold 1 from the fixed mold 2. Can be removed from the molded undercut.
Therefore, it is possible to provide a molding apparatus that can quickly demold each core without interfering with the undercut formed on the molding surface of the molded sphere molding die with a simple structure.

For the movement of the first mold part 10 and the second mold part 20 and the pushing plate 62 in the mold clamping direction and the mold opening direction, a normal guide rod or the like is usually used, and these first mold part 10 and second mold part are used. 20 and the pushing plate 62 are passed through the guide rod and guided by the guide rod, and the guide rod is not shown or described in the above embodiment.
The present invention is not limited to the illustrated embodiments, and can be implemented in other configurations without departing from the content described in the claims.

The sectional view which shows typically one form of the forming device concerning the present invention, and shows the mold clamping state of the 1st side part core side. Same as above, an enlarged sectional view of the main part shows the middle of the demolded state. The mold release state is shown in the enlarged sectional view. The sectional view which shows typically one form of the forming device concerning the present invention, and shows the mold clamping state of the 2nd side part core side. Similarly, the sectional view shows the middle of the demolded state. The demolding state is shown in the sectional view. It is a top view which shows a convex mold typically, (a) shows a mold clamping state, and (b) shows a decomposition state.

Explanation of symbols

A: molding device B: mating surface B1: undercut part S: spring 1: movable mold 2: fixed mold 3: central core 10: first mold part 20: second mold part 21: movement space 30: movement restriction Pin 31: fitting protrusions 4A, 4B: first side core 5A, 5B: second side core 41: fitting recess 42: slide plate 43: fitting rod 44: fitting hole 6: pushing member 62 : Extruding plate 63: Pulling member 51: Connecting rod 52: Oscillating space 53: Oscillating space 54: Slide space

Claims (3)

The pair of facing mold parts are clamped by contacting each other, and the mold is opened by separating them, and the center part of the molding die for a sphere having an undercut is molded on one mold part And a central core that is clamped so as to surround the central core, and at least two or more side cores that move toward the central core and demold from the undercut are disposed. In the molded sphere mold,
The one mold part includes a first mold part that supports the central core and a second mold part that supports the side core,
The first mold part and the second mold part are biased in a direction away from each other,
Further, the second mold part is provided with a movement restricting pin that fits into the first mold part and restricts the movement of the first mold part in the demolding direction, and demolds the first mold part. When moved in the direction, the first mold part and the second mold part are separated from each other, but when the separation operation of the first mold part is regulated by the movement regulating pin, the first mold part is further separated. When the mold part moves in the demolding direction, the second mold part moves in the demolding direction along with the movement,
When the first mold part and the second mold part approach each other, the center core and the side core are clamped, and the mold is opened by separating from the under mold and the side core is molded. A molding apparatus for a molding die for a sphere, wherein the molding die is removed from a cut. The second mold part is provided with the same number of side-cores as the fitting cores that are fitted to the side cores in the mold-clamping state, while being provided on the side cores. A fitting hole for fitting the fitting rod is provided so as to incline in the same direction as the inclination direction of the fitting rod, and the fitting rod is fitted into the fitting hole during the operation from the mold clamping state to the mold clamping release state. On the other hand, the spherical mold according to claim 1, wherein a force in a direction in which the side core is moved toward the central core is applied so as to come out of the fitting hole. Molding equipment. The second mold part is connected to a side core and connected to the side core so as to be swingable in a direction in contact with and away from the central core. 2. The spherical body according to claim 1, wherein the connecting rod swings in a direction of moving the side core toward the central core during the operation from the state to the mold clamping release state. Molding mold molding equipment.

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