JP7202918B2 - Mold equipment and test method - Google Patents

Description

The present invention relates to a mold apparatus and test method. More specifically, a mold apparatus that fills a cavity formed between a fixed mold and a movable mold with a fluid material to mold a molded product according to the shape of the cavity, and fluidity in the cavity It relates to a test method for verifying the fluidity of materials.

In the injection molding method, the cavity formed in the mold is filled with a fluid material such as molten resin injected from an injection molding machine, and the fluid material is cooled and solidified to fit the cavity. Mold the molded product of the shape. When molding a molded product by such an injection molding method, its quality is greatly influenced by the fluidity of the fluid material in the cavity.

Therefore, when a product is mass-produced by injection molding, a test is conducted to verify the fluidity of the fluid material that is the material of the product. In this test, the cavity formed in the test mold is filled with the fluid material on a trial basis, and the fluidity of the fluid material is verified by measuring the pressure at each part in this cavity ( For example, see Patent Document 1).

In addition, in order to verify the fluidity, it is necessary to use a test mold that has a cavity that ensures a sufficient flow length. For this reason, test molds tend to be large. Therefore, in the test mold disclosed in Patent Document 1, a sufficient flow length is ensured with a small mold by making the shape of the cavity portion helical in plan view.

JP 2004-361348 A

By the way, in the test for verifying the fluidity, it may be required to change the flow length, shape, etc. of the cavity portion of the test mold according to the contents of the test. However, in the test mold of Patent Document 1, since the flow length, shape, etc. of the cavity portion cannot be changed, it is necessary to prepare a new test mold with a different flow length.

An object of the present invention is to provide a mold apparatus that can adjust the flow length as needed while securing a sufficient flow length with a small mold, and a test method using this mold apparatus. do.

(1) A mold apparatus (for example, a mold apparatus 1 to be described later) according to the present invention includes a fixed mold (for example, a cavity mold 2 to be described later) and a movable mold (for example, a A core mold 3) is provided, and a fluid material is injected into a cavity portion (for example, a cavity portion 5 described later) formed between the fixed mold and the movable mold, and is adjusted according to the shape of the cavity portion. Molded articles (for example, molded articles 90 and 91 described later) are molded, and the fixed mold includes a nozzle (for example, an injection molding machine 42 described later) for injecting a fluid material. , an injection nozzle 45 to be described later) is formed, and the cavity portion has a disc shape in plan view along the axis of the first flow path. The fixed mold includes a second flow path (for example, runner flow paths 615, 625, 635a, 635b, which will be described later) that extends radially with respect to the axis and communicates the first flow path and the cavity portion. , 635c) (for example, a first gate insert 61, a second gate insert 62, and a third gate insert 63, which will be described later), and a cavity extending along the radial direction. At least one split insert (for example, cavity inserts 70 to 79 to be described later) that is divided along the circumferential direction with respect to the axis is detachably provided.

(2) In this case, the split insert is constructed by stacking a plurality of plate materials (for example, the insert main body 701 and the plate thickness adjusting shim plate 702 described later) having the same contour in plan view. Preferably, the thickness of the split insert can be changed by changing the number of laminated plate members.

(3) In this case, the cash -type device extends along the diameter direction and communicates between the first -class path and the cavity portion (for example, the runner flow path 615, 625, 635A, the following). 635b, 635c), and includes a plurality of central insert members (for example, a first gate insert 61, a second gate insert 62, and a third gate insert 63, which will be described later) that are disk-shaped in plan view, Preferably, each of the plurality of central insert members has a different number of radial flow passages or a different cross-sectional shape of the flow passages, and any one of them can be detachably attached to the fixed mold as the gate insert.

(4) In this case, part of the mold surface (for example, mold surface 34a to be described later) forming the cavity surface of the cavity portion of the movable mold is a movable mold insert that is detachably provided with respect to the movable mold. (for example, a large core insert 300 and small core inserts 301 to 309, which will be described later), and at least one concave portion (for example, concave portions 300c, 300d and a concave portion 301c, which will be described later) on the surface of the movable mold insert. ) is preferably formed.

(5) The test method according to the present invention is formed between a fixed mold (for example, a cavity mold 2 to be described later) and a movable mold (for example, a core mold 3 to be described later) that can move forward and backward with respect to the fixed mold. A method for verifying the fluidity of a fluid material in a cavity portion (for example, a cavity portion 5 described later), wherein an injection molding machine for injecting the fluid material (for example, an injection molding machine described later 42) (for example, an injection nozzle 45 described later) is connected to a first flow path (for example, a sprue flow path 23 described later), and the cavity portion extends along the axis of the first flow path. A plurality of sensors are provided on a mold surface (for example, a mold surface 34a to be described later) of the movable mold that forms a cavity surface of the cavity portion. In the test method, a second flow path (for example, runner flow paths 615, 625, 635a, 635b, and 635c, which will be described later) that extends radially with respect to the axis and communicates the first flow path and the cavity portion is used. are formed (for example, a first gate insert 61, a second gate insert 62, and a third gate insert 63, which will be described later), and the cavity extends along the radial direction to the axis. A step of installing at least one split insert (for example, cavity inserts 70 to 79 described later) divided along the circumferential direction in the fixed mold (for example, step S2 in FIG. 14 described later); to the fixed mold to connect the first flow path and the second flow path (for example, the step of S4 in FIG. 14 described later), and flow from the injection molding machine to the first flow path and a step of injecting a fluid material and measuring the state inside the cavity portion with the plurality of sensors while filling the cavity portion with the fluid material (for example, the step of S5 in FIG. 14 described later). and

(1) In the mold apparatus of the present invention, the shape of the cavity portion is disc-shaped in plan view along the axis of the first flow path. As a result, the shape of the flow path through which the fluid material flows can be made arcuate in the cavity, so that a sufficiently long flow length can be ensured with a small mold. Further, in the mold apparatus of the present invention, the gate insert in which the second flow path for guiding the fluid material to the cavity portion is formed, and the At least one split insert for splitting is detachably provided with respect to the fixed mold. Therefore, according to the mold apparatus of the present invention, by changing the installation position of the split insert with respect to the fixed mold or by removing the split insert from the fixed mold, the flow length of the cavity can be freely adjusted according to the contents of the test. can be changed.

(2) In the mold apparatus of the present invention, the split insert is constructed by stacking a plurality of plate materials, and the thickness of the split insert can be changed by changing the number of laminated plate materials. . Therefore, according to the mold apparatus of the present invention, it is possible to freely change not only the flow length of the cavity but also the plate thickness of the cavity according to the contents of the test as described above.

(3) In the mold apparatus of the present invention, a plurality of central nested members each having a different number of radial flow passages or a different cross-sectional shape of the flow passages are prepared, and one of the plurality of central nested members is inserted into the gate. Set to fixed type as a child. As a result, various tests can be performed simply by changing the central insert member provided in the fixed mold as the gate insert. For example, when a central insert member having two or more radial flow paths is provided as a gate insert in a fixed mold, for a plurality of small cavity portions formed by dividing the cavity portion by split inserts, Since the flowable material can be filled through these radial flow paths, a plurality of tests can be performed in one injection molding, and the time required for the tests can be shortened. In addition, by preparing a plurality of central insert members having different channel cross-sectional shapes of the radial channels, it is possible to perform tests by changing the shape of the gate of the fluid material.

(4) By making part of the mold surface forming the cavity surface concave, it is possible to form convex ribs on the surface of the molded product. Concave sink marks may be unintentionally formed on the opposite side of the surface. On the other hand, in the mold apparatus of the present invention, a movable mold insert having at least one concave portion formed on its surface is detachably attached to the movable mold as a part of the mold surface forming the cavity surface. A test for verifying the presence or absence of sink marks can be easily performed.

(5) The test method of the present invention includes the steps of installing a gate insert and a split insert in a fixed mold, bringing a movable mold provided with a plurality of sensors close to the fixed mold, and connecting the channel with a second channel of the gate insert; and measuring conditions within the cavity with a plurality of sensors while filling the cavity with the flowable material. As a result, it is possible to conduct a test for verifying the fluidity of the fluid material while setting the flow length in the cavity to a length according to the contents of the test.

It is a figure which shows the structure of the test apparatus containing the metal mold|die apparatus which concerns on one Embodiment of this invention. 1 is a perspective view showing an external configuration of a mold device; FIG. Figure 3 is a cross-sectional view along line III-III of the mold assembly; It is the perspective view which looked at the molded article shape|molded by the metal mold|die apparatus from the surface side. It is a perspective view which shows the structure of a core type|mold. FIG. 4 is a diagram showing the configuration of a large core insert; FIG. 4 is a diagram showing the configuration of a small core insert; FIG. 6 is a cross-sectional view of the nesting recess and small core nesting along line VV in FIG. 5; It is an exploded perspective view showing the structure of a cavity mold. FIG. 4 is an exploded perspective view showing the configuration of a cavity insert; FIG. 4 is a perspective view showing the configuration of a first gate insert; FIG. 4 is a perspective view showing the configuration of a second gate insert; FIG. 11 is a perspective view showing the configuration of a third gate insert; FIG. 4 is a plan view of the cavity mold with the first gate insert attached; FIG. 10 is a plan view of a cavity mold with a third gate insert attached; It is a figure which shows an example of the molded product shape|molded by a metal mold|die apparatus. It is a flow chart which shows the procedure of the test method concerning this embodiment.

A configuration of a mold apparatus 1 according to an embodiment of the present invention and a test method using the mold apparatus 1 will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of a test apparatus T including a mold apparatus 1. As shown in FIG. The test apparatus T is for performing a test for verifying the fluidity of the molding material by measuring the state in the cavity while filling the molding material having fluidity into the cavity formed by the mold apparatus 1. It is a device.
FIG. 2 is a perspective view showing the external configuration of the mold device 1. As shown in FIG.
FIG. 3 is a partial cross-sectional view of the mold device 1. FIG. More specifically, FIG. 3 is a cross-sectional view of the mold device 1 along line III-III in FIG.

The test apparatus T includes a mold device 1 for testing, a mold support device 40 , a mold clamping unit 41 and an injection molding machine 42 .

A mold apparatus 1 includes a cavity mold 2 as a fixed mold and a core mold 3 as a movable mold that can move forward and backward with respect to the cavity mold 2 . As shown in FIG. 3, when the cavity mold 2 and the core mold 3 are clamped together, the space between the cavity mold 2 and the core mold 3 forms a cavity filled with the molding material injected from the injection molding machine 42. is formed. A through-hole 21 extending along the clamping direction is formed in the center of the cavity mold 2 . A cylindrical sprue bushing 22 is inserted into the through-hole 21 and has a sprue passage 23 extending in the clamping direction to guide the molding material injected from the injection molding machine 42 into the cavity portion 5 . there is The mold apparatus 1 molds a molded product according to the shape of the cavity portion 5 by filling a molding material into the cavity portion 5 formed between the cavity mold 2 and the core mold 3 .

The mold support device 40 includes a fixed platen 401 , a movable platen 402 provided facing the fixed platen 401 , and tie bars 403 supporting the fixed platen 401 and the movable platen 402 . A cavity mold 2 is fixed to the stationary platen 401 . A core die 3 is fixed to the movable platen 402 so as to face the cavity die 2 . The tie bars 403 extend along the mold clamping direction and support the movable platen 402 so as to be slidable along the mold clamping direction. The mold clamping unit 41 slides the core mold 3 supported by the tie bars 403 in accordance with a command from a control device (not shown) to bring the core mold 3 closer to the cavity mold 2, thereby clamping the core mold. The mold 3 is separated from the cavity mold 2 and the mold is opened.

The injection molding machine 42 includes a main body 43 and a base 44 that supports the main body 43 . The main body 43 includes a cylinder 46 having an injection nozzle 45 formed at its distal end, a screw 49 rotatably supported within the cylinder 46, and a screw 49 provided at the proximal end of the cylinder 46 within the cylinder 46. A motor 47 for rotation, a hopper 48 for supplying molding material into the cylinder 46, and a heater (not shown) for heating the molding material in the cylinder 46 are provided. The injection nozzle 45 of the injection molding machine 42 is connected to the sprue flow path 23 of the sprue bushing 22 as described above (see FIGS. 2 and 3, etc.).

The injection molding machine 42 heats the molding material in the cylinder 46 supplied from the hopper by the heater, and compresses the molding material in the cylinder 46 along the axial direction by rotating the screw 49 with the motor 47. . As a result, the injection molding machine 42 injects a fluid molding material from the injection nozzle 45 into the mold device 1 . Although a case where a thermoplastic resin is used as a molding material to be injected into the mold device 1 by the injection molding machine 42 will be described below, the present invention is not limited to this. The molding material can be any flowable material such as polypropylene, elastomers, ABS, and polystyrene.

Next, the configuration of the mold apparatus 1 will be described with reference to FIGS. 2 to 12. FIG.
FIG. 4 is a perspective view of a molded product 90 molded by filling the cavity 5 of the mold device 1 with a molding material, viewed from the surface side. A molded product 90 shown in FIG. 4 is an example of a plurality of types of molded products molded by the mold apparatus 1 . As will be described later, the mold apparatus 1 is capable of molding many types of molded products by combining multiple types of inserts installed in the cavity portion 5 .

As shown in FIG. 4, the molded product 90 includes a rod-shaped shaft portion 900, a disc-shaped product portion 902 when viewed along the axis of the shaft portion 900, a tip portion of the shaft portion 900, and an inner edge portion of the product portion 902. and a rod-shaped connecting portion 901 that connects the .

Axial portion 900 is a portion formed by sprue channel 23 formed in sprue bushing 22 . The connecting portion 901 is a portion formed by a runner flow path formed in a gate insert, which will be described later. This molded product 90 is molded by using the first gate insert 61 having one runner channel among a plurality of gate inserts 61 to 63 which will be described later. For this reason, the molded product 90 has one connecting portion 901 .

The product part 902 is a part molded by the cavity part 5 formed between the mold surface of the cavity mold 2 and the mold surface of the core mold 3 . Hereinafter, the surface formed by the mold surface of the cavity mold 2 in the product portion 902 is referred to as the front surface 903 and the surface formed by the mold surface of the core mold 3 is referred to as the back surface 904 . The product portion 902 has a disc shape when viewed along the axis of the shaft portion 900 . That is, the cavity portion 5 formed between the cavity mold 2 and the core mold 3 is a disk-shaped cavity in plan view along the axis of the sprue flow path 23 .

Next, detailed configurations of the cavity mold 2 and the core mold 3 will be described.
FIG. 5 is a perspective view showing the configuration of the core mold 3. As shown in FIG.

The core mold 3 is configured by combining a core mold main body 31, a plurality of guide pins 32, a plurality of core inserts 300-309, and a plurality of sensors (not shown).

The core-type main body 31 has a columnar shape with an axis O3 parallel to the clamping direction as a central axis. The core-type main body 31 has a substantially square shape in plan view along the axis O3. Rod-shaped guide pins 32 extending along the axis O3 are provided at the four corners of the core-type main body 31 on the surface 31a side. The core mold 3 and the cavity mold 2 insert the core mold 3 into the cavity while inserting the guide pins 32 provided in the core mold main body 31 along the guide holes 25 (see FIG. 8 described later) formed in the cavity mold 2. The mold is clamped by bringing it closer to the mold 2 .

In FIG. 5, of the surface 34 of the core mold body 31, the contour line of the mold surface 34a is illustrated by a dashed line. Here, the mold surface 34a refers to a surface that forms the cavity surface of the cavity portion 5 formed between the core mold 3 and the cavity mold 2 when the core mold 3 and the cavity mold 2 are clamped. . Therefore, of the surface 34 of the core mold body 31, the surface other than the mold surface 34a serves as a parting surface 34b that contacts the surface of the cavity mold 2 during mold clamping. As shown in FIG. 5, the mold surface 34a of the core mold body 31 is concentric with the axis O3 as the center.

FIG. 6A is a diagram showing the configuration of the large core insert 300 viewed from its surface 300a side. As shown in FIG. 6A, the large core insert 300 is a substantially fan-shaped plate material in plan view. Of the surface 300a of the large core insert 300, a plurality (6 in the example of FIG. 6A) of linear recesses 300c extending along the radial direction are formed at the left end in the circumferential direction. A plurality (6 in the example of FIG. 6A) of linear recesses 300d extending in the radial direction are formed in the end portion. As shown in FIG. 6A, the depth of each recess 300c, 300d increases radially outward. On the other hand, the rear surface 300b of the large core insert 300 is not formed with such a recess. In this embodiment, the number of recesses formed on the surface 300a of the large core insert 300 is 12, but the present invention is not limited to this. The number of recesses formed on the surface 300a of the large core insert 300 should be one or more.

A sensor mounting hole 300e as a through hole penetrating from the front surface 300a to the rear surface 300b is formed in the large core insert 300 slightly closer to the concave portion 300c than the center in the width direction. A bolt insertion hole 300f as a through hole penetrating from the surface 300a to the rear surface 300b is formed in the approximate center of the large core insert 300, that is, between the recess 300c and the recess 300d. The large core insert 300 is fixed to the core type body 31 by tightening a bolt 330 (see FIG. 5) that is inserted through the bolt insertion hole 300f.

The mold apparatus 1 has a large core insert 300 with a plurality of recesses 300c and 300d formed on its surface 300a as described above (see FIG. 6A), and a surface without a plurality of recesses. There are two types, one and (not shown). An operator can attach either one of these two types of large core insert 300 to the core type main body 31 . 5 shows an example in which a large core insert 300 having a plurality of recesses 300c and 300d is attached to the core type main body 31. As shown in FIG.

FIG. 6B is a diagram showing the configuration of the small core insert 301 viewed from its surface 301a side. As shown in FIG. 5, the core type main body 31 includes one large core insert 300 and nine small core inserts 301, 302, 303, 304, 305, 306, 307, 308, and 309. is detachably provided. Since the nine small core inserts 301 to 309 are all the same in shape and size, only the small core insert 301 is illustrated in FIG. 6B as a representative.

As shown in FIG. 6B, the small core insert 301 is a rectangular plate material in plan view. A surface 301a of the small core insert 301 is formed with a plurality (six in the example of FIG. 6B) of linear recesses 301c extending along its longitudinal direction. As shown in FIG. 6B, the depth of each concave portion 301c increases toward the distal end side along the longitudinal direction. On the other hand, the rear surface 301b of the small core insert 301 is not formed with such a concave portion and is substantially flat. In this embodiment, the case where the number of recesses formed on the surface 301a of the small core insert 301 is six will be described, but the present invention is not limited to this. The number of recesses formed on the surface 301a of the small core insert 301 should be one or more.

A bolt insertion hole 301d as a through hole penetrating from the surface 301a to the back surface 301b is formed in the small core insert 301 on the tip side of the concave portion 301c. The small core insert 301 is fixed to the core type main body 31 by fastening a bolt 331 (see FIG. 5) inserted through the bolt insertion hole 301d. A tapered surface 301e that intersects the surface 301a at an angle of 90° or less is formed on the tip side of the small core insert 301 . Further, on the base end side of the back surface 301b side of the small core insert 301, a convex insertion portion 301f is formed along the longitudinal direction.

In the mold device 1, the small core inserts 301 to 309 have a plurality of recesses 301c formed on the surface 301a as described above (see FIG. 6B), and a plurality of recesses are not formed on the surface. There are two types, one and (not shown). An operator can attach either one of these two types of small core inserts 301 to 309 to the core type main body 31 . In FIG. 5, the large core insert 300 and the small core inserts 302, 304, 306, 308 each having a plurality of recesses formed on their surfaces are shown as the small core inserts 301, 303, 305, 307. , 309 shows an example in which a plurality of recesses are not formed on each surface and attached to the core type body 31 .

Returning to FIG. 5, on the surface 34 of the core type body 31, there are ten core inserts 300, 301, 302, 303, 304, 305, 306, 307, 308, 309 as described above and a contour shape in plan view. are formed with nesting recesses 200, 201, 202, 203, 204, 205, 206, 207, 208 and 209 having the same . The core inserts 300-309 are detachable from the insert recesses 200-209, respectively. These nesting recesses 200 to 209 are formed at approximately equal intervals along the circumferential direction with respect to the axis O3 in this order clockwise. Further, each of the recesses 200 to 209 is formed radially around the axis O3 such that the longitudinal direction of each recess is parallel to the radial direction with respect to the axis O3.

The large core insert 300 is fixed to the insert recess 200 by tightening the bolt 330 while being fitted in the insert recess 200 .

FIG. 7 is a cross-sectional view of the insert recess 201 and the small core insert 301 along line VV in FIG. As shown in FIG. 7, a recess 201a is formed radially inwardly of the insert recess 201, into which the insertion portion 301f of the small core insert 301 is fitted. A tapered surface 201b with which the tapered surface 301e of the small core insert 301 contacts is formed on the radially outer side of the insert recess 201 . The small core insert 301 is inserted into the insert recess 201 by inserting the insertion portion 301f formed on the tip side into the recess 201a and further pushing it radially inward so that the tapered surfaces 301e and 201b are in sliding contact with each other. match up. The small core insert 301 is fixed to the insert recess 201 by tightening the bolt 331 while being fitted in the insert recess 201 as described above. Although detailed illustration and description are omitted, the other core inserts 302 to 309 are also fixed to the insert recesses 202 to 209 by the same procedure.

Returning to FIG. 5, the depth along the axis O3 of each nest recess 200-209 is equal to the thickness from the front surface to the rear surface of each core nest 300-309. Therefore, when each of the core inserts 300-309 is fitted into each of the insert recesses 200-209, the surface 34 of the core-type main body 31 is flush with the surface of each of the core inserts 300-309. Further, as shown in FIG. 5, each of the nesting recesses 200 to 209 is formed such that at least a portion thereof is contained within the mold surface 34a of the core mold body 31. As shown in FIG. Therefore, when each of the core inserts 300 to 309 is fitted into each of the insert recesses 200 to 209, a part of the mold surface 34a forming the cavity surface of the cavity portion 5 in the core mold 3 is .about.309 surfaces.

Further, as shown in FIG. 5, when the core inserts 300 to 309 are fitted into the respective insert recesses 200 to 209 with the surfaces of the core inserts 300 to 309 exposed on the front side, the surfaces of the core inserts 300 to 309 are formed. The plurality of recesses and the sensor mounting hole 300e of the large core insert 300 are included in the mold surface 34a, and the bolts 330 to 339 for fixing the respective core inserts 300 to 309 to the core mold main body 31 are provided on the mold surface. It is adapted to be contained within parting surface 34b outside 34a.

The core die 3 is arranged so that its surface 34 is perpendicular to the horizontal plane, and that the nesting recess 200 in which the large core nesting 300 is fitted is vertically higher than the other nesting recesses 201 to 209. , it is set in the mold support device 40 .

A plurality (10 in the example of FIG. 5) of sensor mounting holes 800 to 809 are formed in the portion of the core type body 31 where the mold surface 34a is formed. The sensor mounting hole 800 is formed between the large core insert 300 and the small core insert 301 in the mold surface 34a. The sensor mounting hole 801 is formed between the small core insert 301 and the small core insert 302 in the mold surface 34a. The sensor mounting hole 802 is formed between the small core insert 302 and the small core insert 303 in the mold surface 34a. The sensor mounting hole 803 is formed between the small core insert 303 and the small core insert 304 in the mold surface 34a. The sensor mounting hole 804 is formed between the small core insert 304 and the small core insert 305 in the mold surface 34a. The sensor mounting hole 805 is formed between the small core insert 305 and the small core insert 306 in the mold surface 34a. The sensor mounting hole 806 is formed between the small core insert 306 and the small core insert 307 in the mold surface 34a. The sensor mounting hole 807 is formed between the small core insert 307 and the small core insert 308 in the mold surface 34a. The sensor mounting hole 808 is formed between the small core insert 308 and the small core insert 309 in the mold surface 34a. The sensor mounting hole 809 is formed between the small core insert 309 and the large core insert 300 in the mold surface 34a. Further, as described above, the large core insert 300 is also formed with the sensor mounting hole 300e. For this reason, a total of eleven sensor mounting holes 800 to 809 and 300e are formed in the mold surface 34a of the core mold body 31. As shown in FIG.

Sensors (not shown) for detecting the state inside the cavity portion 5 are provided in the sensor mounting holes 800 to 809 and 300e. Accordingly, the state inside the cavity portion 5 while the cavity portion 5 is being filled with the molding material by injection molding is detected by the sensors installed in the sensor mounting holes 800 to 809 and 300e. Although a case where pressure sensors are provided in these sensor mounting holes 800 to 809 and 300e will be described below, the present invention is not limited to this. The sensors installed in the sensor mounting holes 800 to 809, 300e are not limited to pressure sensors, but may be temperature sensors, flow rate sensors, or the like. Further, in this embodiment, the case where the number of sensor mounting holes formed in the core type main body 31 is 11 will be described, but the present invention is not limited to this. The number of sensor mounting holes may be more than eleven or less than eleven.

FIG. 8 is an exploded perspective view showing the configuration of the mold surface side of the cavity mold 2. As shown in FIG.
The cavity mold 2 includes a cavity mold main body 20, a sprue bushing 22, a plurality of gate inserts 61, 62, 63 (only the first gate insert 61 is shown in FIG. 8), and a plurality of cavity inserts. 70 to 79 are combined.

The cavity mold body 20 has a columnar shape with an axis O2 parallel to the clamping direction as a central axis. The cavity-type main body 20 has a substantially square shape in plan view along the axis O2. At the four corners on the surface 24 side of the cavity mold main body 20, a plurality of guide pins 32 (Fig. 5) is formed.

A through hole 21 extending along the axis O2 is formed in the central portion of the cavity-type main body 20 . A sprue bushing 22 is inserted into the through hole 21 as described with reference to FIG.

A recessed recess 26 is formed in the central portion of the cavity mold body 20 . The insert recess 26 has a disk shape centered on the axis O2 when viewed from above along the axis O2. In the recess 26, one of a plurality of (three in this embodiment) gate inserts 61 to 63 and a plurality of (ten in this embodiment) cavity inserts 70 to 79 are provided. is detachably provided. Each of the cavity inserts 70, 71, 72, 73, 74, 75, 76, 77, 78, 79 is fan-shaped in plan view along the axis O2, and rotates clockwise along the circumferential direction with respect to the axis O2. They are provided in the nest recess 26 in order. The gate inserts 61 to 63 are disk-shaped in plan view along the axis O2, as shown in FIGS. 10A to 10C which will be described later.

In the cavity mold 2, the mold surface forming the cavity surface of the cavity portion 5 is formed by the gate insert provided in the insert recess 26 and a plurality of cavity inserts 70-79. Therefore, of the surface 24 of the cavity mold body 20, the part other than the bottom surface 24a of the recess 26 serves as a parting surface 24b that contacts the parting surface 34b of the core mold 3 during mold clamping. A plurality of (six in the example of FIG. 8) bolt holes 27 are formed in the bottom surface 24a of the insert recess 26 around the axis O2 along the circumferential direction at predetermined intervals.

The sprue bushing 22 is cylindrical, and a sprue flow path 23 extending along the axis O2 is formed therein. As shown in FIG. 3 , when the sprue bushing 22 is inserted into the through hole 21 of the cavity mold body 20 , the tip 22 a faces the cavity 5 formed between the cavity mold 2 and the core mold 3 . Further, as shown in FIG. 3, the sprue flow path 23 has a tapered shape that increases in diameter from the base end side toward the tip end side.

FIG. 9 is an exploded perspective view showing the configuration of the cavity insert 70. As shown in FIG. As shown in FIG. 8, since all the ten cavity inserts 70 to 79 have the same shape and size, only the cavity insert 70 is illustrated in FIG. 9 as a representative.

The cavity insert 70 is constructed by laminating three plate members, namely, an insert main body 701 , a thickness adjusting shim plate 702 and a gate shim plate 703 .

The insert main body 701 is a fan-shaped plate member extending along the radial direction in plan view, as shown in FIG. A through-hole 701b is formed in an inner diameter portion 701a of the insert main body 701 . The thickness adjusting shim plate 702 is a fan-shaped plate extending radially in plan view as shown in FIG. The thickness adjusting shim plate 702 has the same profile as the core body 701 in plan view. The thickness adjusting shim plate 702 is provided on the rear surface 701c side of the insert body 701 . A through hole 702b is formed in an inner diameter portion 702a of the thickness adjusting shim plate 702 . The plate thickness of the plate thickness adjusting shim plate 702 is thinner than the plate thickness of the insert main body 701 .

With the thickness adjusting shim plate 702 facing the bottom surface 24a of the insert recess 26, bolts (not shown) are inserted into the through holes 701b and 702b of the stacked insert main body 701 and the thickness adjusting shim plate 702. Then, it is fixed to the insert recess 26 by screwing it into a bolt hole (not shown) formed in the insert recess 26 (see FIG. 8).

As described above, the thickness of the cavity insert 70 is adjusted depending on whether or not the thickness adjusting shim plate 702 is inserted between the insert main body 701 and the bottom surface 24a of the insert recess 26. can do. More specifically, when the thickness adjusting shim plate 702 is inserted, the thickness of the cavity insert 70 becomes equal to the depth of the insert concave portion 26, and when the thickness adjusting shim plate 702 is not inserted. , the thickness of the cavity insert 70 is thinner than the depth of the insert recess 26 .

More specifically, when the thickness adjusting shim plate 702 is not inserted, the surface 701 d of the insert main body 701 is lower than the parting surface 24 b of the cavity-type main body 20 . Therefore, when the mold is clamped without inserting the shim plate 702 for thickness adjustment, the surface 701d of the nest body 701 functions as a mold surface for forming the cavity surface of the cavity portion 5, as shown in FIG.

Further, when the plate thickness adjusting shim plate 702 is inserted, the surface 701d of the insert body 701 is flush with the parting surface 24b of the cavity mold body 20 . Therefore, when the die is clamped with the thickness adjusting shim plate 702 inserted, the surface 701d of the insert body 701 comes into contact with the die surface 34a of the core die body 31 and functions as a parting surface.

In this embodiment, the case where the plate thickness of the cavity insert 70 is adjusted by one plate thickness adjusting shim plate 702 will be described, but the present invention is not limited to this. The number of thickness adjusting shim plates may be two or more, and the thickness of the cavity insert may be changed in three or more stages.

The gate shim plate 703 has the same profile as the inner diameter portion 701a of the insert main body 701 in plan view. A magnet (not shown) is provided on the gate shim plate 703, and the gate shim plate 703 is attached to the inner diameter portion 701a of the insert main body 701 by the magnetic force generated by the magnet. Gate inserts 61 to 63 to be described later are provided in the insert recesses 26 so that their bottom surfaces are in contact with the gate shim plate 703 . The gate shim plate 703 adjusts the thickness of the gate inserts 61 to 63 so that the surfaces of the gate inserts 61 to 63 and the surface 701d of the insert main body 701 are flush with each other.

Returning to FIG. 8, when the ten cavity inserts 70 to 79 are attached to the insert concave portion 26 of the cavity mold main body 20 as described above and the mold is clamped, the cavity insert 70 is provided in the core mold 3. The portion of the large core insert 300 where the concave portion 300c is formed and the small core insert 309 face each other, the cavity insert 71 faces the small core insert 308 provided in the core mold 3, and the cavity insert 72 faces The cavity insert 73 faces the small core insert 307 provided in the core mold 3 , the cavity insert 74 faces the small core insert 306 provided in the core mold 3 , and the cavity insert 74 faces the small core insert 307 provided in the core mold 3 . The core insert 305 is opposed, the cavity insert 75 is opposed to the small core insert 304 provided in the core mold 3, the cavity insert 76 is opposed to the small core insert 303 provided in the core mold 3, The cavity insert 77 faces the small core insert 302 provided in the core mold 3, the cavity insert 78 faces the small core insert 301 provided in the core mold 3, and the cavity insert 79 faces the core mold 3. of the large core nesting member 300 provided in the 1, the recess 300d is formed.

10A is a perspective view showing the configuration of the first gate insert 61. FIG.
The first gate insert 61 is a disk-shaped member in plan view along the axis O2. The first gate insert 61 is formed with a sprue through-hole 611 passing through its back surface 618 and front surface 619 and three mounting holes 612 , 613 , 614 .

A sprue through hole 611 is formed in the center of the first gate insert 61 . The sprue through hole 611 extends along the axis O2. As shown in FIG. 3 , the tip portion 22 a of the sprue bushing 22 is inserted through the sprue through hole 611 .

A surface 619 of the first gate insert 61 is formed with a concave runner channel 615 extending radially from the sprue through hole 611 with respect to the axis O2. The radially outer side of the runner channel 615 communicating with the cavity portion 5 serves as a gate channel 616 having a smaller diameter than the radially inner side.

The mounting holes 612 , 613 , 614 are formed radially outside the sprue through-hole 611 in the first gate insert 61 at predetermined intervals along the circumferential direction. In the first gate insert 61, one bolt is inserted into each of these three mounting holes 612 to 614, and these three bolts are screwed into the bolt holes 27 formed in the insert recess 26 of the cavity type body 20. It is attached to the telescoping recess 26 by doing so. Here, each of the mounting holes 612, 613, 614 has an arcuate shape extending in the circumferential direction in plan view along the axis O2. Therefore, the first gate insert 61 can be attached to the insert recess 26 with these bolts while adjusting the mounting angle with respect to the insert recess 26 so that the runner flow path 615 of the first gate insert 61 faces a desired direction. ing.

As shown in FIG. 3 , when the mold is clamped with the first gate insert 61 attached to the insert recess 26 , the surface 619 of the first gate insert 61 comes into contact with the mold surface 34 a of the core mold 3 . That is, the surface 619 of the first gate insert 61 functions as a parting surface. Further, when the mold is clamped with the first gate insert 61 attached to the insert recess 26, the runner flow path 615 and the gate flow path 616 formed in the first gate insert 61 are aligned with the cavity portion 5 and the sprue flow path 23. communicate with.

10B is a perspective view showing the configuration of the second gate insert 62. FIG. The structures of the sprue through-hole 621, the mounting holes 622, 623, 624, the rear surface 628, and the front surface 629 of the second gate insert 62 are the sprue through-hole 611 of the first gate insert 61, the mounting holes 612, 613, 614, Since it is the same as the structure of the back surface 618 and the front surface 619, detailed description is omitted. The second gate insert 62 differs from the above-described first gate insert 61 in the channel cross-sectional shape of the runner channel 625 .

A concave runner channel 625 extending radially from the sprue through-hole 621 with respect to the axis O2 is formed on the surface 629 of the second gate insert 62 . As shown in FIG. 10B, the width of the runner channel 625 increases along the circumferential direction from the radially inner side toward the outer side. That is, the runner channel 625 formed in the second gate insert 62 is a so-called direct gate that does not have a gate channel.

10C is a perspective view showing the configuration of the third gate insert 63. FIG. The structures of the sprue through-hole 631, the mounting holes 632, 633, 634, the rear surface 638, and the front surface 639 of the third gate insert 63 are the same as those of the sprue through-hole 611 of the first gate insert 61, the mounting holes 612, 613, 614, Since it is the same as the structure of the back surface 618 and the front surface 619, detailed description is omitted. The third gate insert 63 differs from the above-described first gate insert 61 in the number of runner channels 635a, 635b, 635c.

A first runner channel 635a, a second runner channel 625b, and a third runner channel 625c extending radially from the sprue through-hole 631 with respect to the axis O2 are formed on the surface 639 of the third gate insert 63. is formed. The first runner flow path 635a, the second runner flow path 625b, and the third runner flow path 625c are arranged at approximately equal intervals along the circumferential direction on the surface 639 of the third gate insert 63 in this order clockwise. is formed by A first runner channel 635a is formed between the mounting holes 634 and 632, a second runner channel 635b is formed between the mounting holes 632 and 633, and a third runner channel 635c is formed. is formed between the mounting holes 633 and 634 . Among these runner channels 635a, 635b, and 635c, the radially outer sides communicating with the cavity portion 5 are gate channels 636a, 636b, and 636c having diameters smaller than those of the radially inner sides.

According to the mold apparatus 1 configured as described above, by combining the cavity inserts 70 to 79 and the gate inserts 61 to 63, it is possible to mold molded products of various shapes.

FIG. 11 is a plan view of the cavity mold 2. FIG. 11 shows the case where the first gate insert 61 is attached to the insert recess 26 of the cavity mold 2 so that the runner channel 615 faces the cavity insert 70. FIG.

When the cavity inserts 70 to 79 are attached to the insert recesses 26 without inserting the plate thickness adjusting shim plate as described above, the surfaces of these cavity inserts 70 to 79 are the parting surfaces of the cavity mold main body 20. 24b. For this reason, when all the cavity inserts 70 to 79 are attached to the insert recesses 26 without inserting the shim plate for thickness adjustment, there is a gap between the cavity mold 2 and the core mold 3 in plan view. At 11, a large cavity is formed with contours as indicated by dashed line 10a. The surface of the product portion molded by this large cavity portion is composed of ten cavity inserts 70-79. Therefore, in the large cavity portion, a flow length corresponding to ten cavity inserts is formed along the circumferential direction around the axis of the cavity mold 2 .

Further, when the cavity inserts 70 to 79 are attached to the insert concave portion 26 by inserting the plate thickness adjusting shim plate as described above, the surfaces of these cavity inserts 70 to 79 are the parting surfaces of the cavity mold main body 20. 24b and functions as a parting surface. Therefore, the cavity insert into which the thickness adjusting shim plate is inserted functions as a split insert that divides the above-described large cavity portion along the circumferential direction with respect to the axis of the cavity mold 2 .

More specifically, for example, among the cavity inserts 70 to 79, for example, the fifth cavity insert 74 in clockwise order is attached to the insert concave portion 26 by inserting a thickness adjusting shim plate. , the large cavity can be divided at the cavity insert 75 to form a small cavity having a contour line as indicated by the dashed line 10b in FIG. 11 in plan view. The surface of the product portion molded by this small cavity portion is composed of four cavity inserts 70-73. Therefore, in the small cavity portion, a flow length corresponding to four cavity inserts is formed along the circumferential direction around the axis of the cavity mold 2 .

As described above, according to the mold apparatus 1 according to the present embodiment, any one of the ten cavity inserts 70 to 79 is used as a split insert to divide the large cavity portion, thereby dividing the cavity portion. Since the flow length can be freely set in the range of one to ten cavity inserts, it is possible to verify the fluidity of the molding material under various flow lengths.

Further, as described with reference to FIG. 10B, the second gate insert 62 has a runner channel 625 called a direct gate. Therefore, by attaching the second gate insert 62 to the insert recess 26, it is possible to verify the fluidity of the molding material under various flow lengths while using the direct gate.

FIG. 12 is a plan view of the cavity mold 2. FIG. In FIG. 12, the third gate insert 63 is placed in the insert recess 26 of the cavity mold 2, the runner channel 635a thereof faces the cavity insert 79, the runner channel 635b faces the cavity insert 73, and the runner flow It is shown mounted so that the channel 635c faces the cavity insert 76. FIG.

As shown in FIG. 12, the third gate insert 63 is formed with three runner channels 635a to 635c. Therefore, when the third gate insert 63 is attached to the insert recess 26, it is possible to mold a plurality of product parts. More specifically, for example, of the ten cavity inserts 70 to 79, only two of the cavity insert 74 and the cavity insert 77 are used as split inserts, so that the outline shown by the dashed line 11a is provided. The large cavity section is divided into three smaller cavity sections with contour lines indicated by dashed lines 11b, 11c and 11d.

The surface of the product portion of the small cavity portion having the outline indicated by the dashed line 11b is formed by the surfaces of the four cavity inserts 70-73. Therefore, in the small cavity portion having the outline indicated by the broken line 11b, a flow length corresponding to four cavity inserts is formed along the circumferential direction around the axis of the cavity mold 2. As shown in FIG. The small cavity portion is filled with the molding material through the runner channel 635b of the third gate insert 63. As shown in FIG.

The surface of the product portion of the small cavity portion having the outline indicated by the dashed line 11c is formed by the surfaces of the two cavity inserts 75-76. Therefore, in the small cavity portion having the outline indicated by the broken line 11c, a flow length corresponding to two cavity inserts is formed along the circumferential direction around the axis of the cavity mold 2. As shown in FIG. Also, this small cavity portion is filled with molding material through the runner channel 635 c of the third gate insert 63 .

The surface of the product portion of the small cavity portion having the outline indicated by the dashed line 11d is formed by the surfaces of the two cavity inserts 78-79. Therefore, a flow length corresponding to two cavity inserts is formed along the circumferential direction around the axis of the cavity mold 2 in the small cavity portion having the outline indicated by the dashed line 11d. Also, this small cavity portion is filled with the molding material through the runner channel 635 a of the third gate insert 63 .

As described above, by using the third gate insert 63, the molding material can be simultaneously supplied to the three divided small cavities, so the fluidity of the molding material can be verified under various flow lengths. It is possible to

According to the mold device 1 according to the present embodiment as described above, the following effects can be obtained.
(1) In the mold device 1, the shape of the cavity portion 5 is disc-shaped in plan view along the axis O2 of the sprue flow path 23. As shown in FIG. As a result, the shape of the flow passage through which the molding material having fluidity flows can be made arcuate in the cavity portion 5, so that a sufficiently long flow length can be ensured with a small cavity mold 2-core mold 3. Further, in the mold apparatus 1, any one of the gate inserts 61 to 63 formed with a runner flow path for guiding the molding material to the cavity portion 5 and a A plurality of cavity inserts 70 to 79 having a function of dividing O2 along the circumferential direction are detachably attached to the cavity mold 2 . Therefore, according to the mold apparatus 1, the flow length of the cavity portion 5 can be freely changed according to the contents of the test by changing the positions of the split inserts among the cavity inserts 70-79.

(2) In the mold apparatus 1, each of the cavity inserts 70 to 79 is configured by stacking two plate materials, namely, the insert main body and the plate thickness adjusting shim plate, and these cavity inserts 70 The thickness of ∼79 can be changed by changing the number of lamination of the core body and the thickness adjusting shim plate. Therefore, according to the mold apparatus 1, the flow length of the cavity portion 5 and the plate thickness of the cavity portion 5 can be freely changed according to the contents of the test as described above.

(3) In the mold apparatus 1, a plurality of gate inserts 61 to 63 each having a different number of runner channels or different channel cross-sectional shapes are prepared, and any one of the plurality of gate inserts 61 to 63 is used as a cavity. It is provided in the nesting recess 26 of the mold 2 . As a result, various tests can be performed simply by changing the type of gate insert provided in the insert recess 26 . For example, when the third gate insert 63 having three runner channels 635a, 635b, and 635c is provided in the insert recess 26, it is formed by dividing the cavity portion 5 by the cavity inserts 70 to 79. A plurality of small cavities can be filled with the molding material through these runner flow paths 635a, 635b, 635c, so that a plurality of tests can be performed in one injection molding, thereby shortening the time required for testing. . Further, by providing the second gate insert 62 having a runner channel 625 called a so-called direct gate in the insert recess 26, it is possible to conduct a test for verifying fluidity under this direct gate.

(4) By making part of the mold surface 34a of the core mold 3 forming the cavity surface concave, convex ribs can be formed on the surface of the molded product. , concave sink marks may be unintentionally formed on the surface opposite to the surface on which the ribs are formed. On the other hand, in the mold apparatus 1, the large core insert 300 and the small core inserts 301 to 309 each having at least one recess formed on its surface are used as part of the mold surface 34a forming the cavity surface. By detachably providing the slab, the above-described test for verifying the presence or absence of sink marks can be easily performed.

Next, a specific procedure of a test method for verifying the fluidity of the molding material injected from the injection molding machine 42 using the test apparatus S configured as described above will be described.

In the following, an example of verifying the fluidity of the molding material by experimentally molding a molded product 91 as shown in FIG. 13 using the mold apparatus 1 will be described. The molded product 91 includes a rod-shaped shaft portion 910, a disk-shaped product portion 912 when viewed along the axis of the shaft portion 910, and a rod-shaped portion connecting the tip portion of the shaft portion 910 and the inner edge portion of the product portion 912. and a connecting portion 911 . As shown in FIG. 13, a product portion 912 of a molded product 91 is molded by filling a molding material into a cavity portion having a flow length corresponding to four cavity inserts. On the back side of the product portion 912 of the molded product 91, three filamentary ribs 915, 916, 917 are formed by recesses formed on the surfaces of the large core insert and the small core insert. there is

FIG. 14 is a flow chart showing the procedure of the test method according to this embodiment.

In S1, the cavity mold 2 and the core mold 3 are opened, and the surface 24 of the cavity mold 2 is exposed.

In S 2 , ten cavity inserts 70 to 79 and one of three gate inserts 61 to 63 are attached to the insert recess 26 of the cavity mold 2 . As described above, the product portion 912 of the molded product 91 is formed by a small cavity portion having a flow length corresponding to four cavity inserts. Therefore, in this case, as described with reference to FIG. 11, the continuous four of the ten cavity inserts 70 to 79 (for example, the cavity inserts 70, 71, 72, and 73) are subjected to plate thickness adjustment. For the cavity insert (e.g., cavity insert 74) that is attached to the insert concave portion 26 without inserting a mounting plate and that is adjacent to the cavity insert that constitutes the end of the four continuous cavity inserts , the thickness adjusting plate is inserted and attached to the insert recess 26 . That is, by using the fifth clockwise cavity insert 74 as a split insert, the large cavity portion having the outline indicated by the dashed line 10a in FIG. To divide. Also, the first gate insert 61 is attached to the insert recess 26 so that the runner channel 615 faces the cavity insert 73 .

Next, in S3, the large core insert 300 and the small core inserts 301-309 are attached to the insert recesses 200-209 of the core mold 3. As shown in FIG. As described above, three filamentary ribs 915 , 916 , 917 are formed on the back side of the product portion 912 of the molded product 91 . For this reason, at least three of the large core insert 300 and the small core inserts 306, 307, 308, 309 facing the four cavity inserts 70 to 73 forming the cavity surface of the small cavity portion are provided. As for the child, it is attached in a state in which the surface in which the concave portion is formed is exposed to the cavity mold 2 side. More specifically, the large core insert 300 and the small core inserts 308 and 306 are attached with their surfaces exposed to the cavity mold 2 side.

In S4, the core mold 3 is brought closer to the cavity mold 2, and the core mold 3 and the cavity mold 2 are clamped to form a contour line shown by a dashed line 10b in FIG. The sprue channel 23 of the sprue bushing 22, the runner channel 615 of the first gate insert 61, and this small cavity are connected.

In S5, the molding material is injected from the injection molding machine 42 into the sprue passage 23, and is injected into the small cavity of the mold surface 34a of the core mold 3 while filling the runner passage 615 and the small cavity portion with the molding material. A plurality of sensors provided in a plurality of sensor mounting holes 806, 807, 808, 809 and 300e formed at facing positions measure the state inside the small cavity.

S... Test device 1... Mold device 2... Cavity mold (fixed mold)
DESCRIPTION OF SYMBOLS 20... Cavity type|mold main body 22... Sprue bush 23... Sprue flow path (1st flow path)
26... Insert recess 3... Core type (movable type)
31... Core type main body 34a... Mold surface 34b... Parting surface 300... Large core insert (movable type insert)
300c, 300d... recess 300e... sensor mounting hole 301 to 309... small core insert (movable insert)
301c... Concave portion 200 to 209... Insert concave portion 800 to 809... Sensor mounting hole 42... Injection molding machine 45... Injection nozzle (nozzle)
5... Cavity part 61... First gate insert (gate insert, central insert member)
615... runner channel (second channel)
616... Gate channel (second channel)
62... Second gate insert (gate insert, central insert member)
625... runner channel (second channel)
63... Third gate insert (gate insert, central insert member)
635a, 635b, 635c... runner channel (second channel)
70 to 79 Cavity insert (split insert)
701 ... Insert body (plate material)
702 ... Shim plate for plate thickness adjustment (plate material)
703... Shim plate for gate

Claims (5)

A fixed mold and a movable mold that can move forward and backward with respect to the fixed mold are provided. A mold device for molding a molded product,
The fixed mold is formed with a first flow path connected to a nozzle of an injection molding machine that injects a fluid material,
The cavity portion has a disk shape in plan view along the axis of the first flow path,
A disk-shaped gate insert in plan view and at least one split insert extending along the radial direction and dividing the cavity portion along the circumferential direction with respect to the axis are attached to and detached from the fixed mold. set at will,
The gate insert includes a hole extending along the axis and communicating with the first flow path, and a second flow path extending radially with respect to the axis and communicating the hole and the cavity, is formed and
A mold apparatus according to claim 1, wherein said gate insert is adjustable in mounting angle about said axis with respect to said fixed mold . A fixed mold and a movable mold that can move forward and backward with respect to the fixed mold are provided. A mold device for molding a molded product,
The fixed mold is formed with a first flow path connected to a nozzle of an injection molding machine that injects a fluid material,
The cavity portion has a disk shape in plan view along the axis of the first flow path,
The fixed mold includes a gate insert formed with a second flow path extending radially with respect to the axis and communicating between the first flow path and the cavity portion; at least one split insert that splits the cavity portion along the circumferential direction with respect to the axis is detachably provided,
The split insert is constructed by stacking a plurality of plate materials having the same contour in plan view,
A mold apparatus, wherein the thickness of the split insert can be changed by changing the number of laminated plate members. A plurality of central insert members each having a disk shape in a plan view, each having a radial flow path extending along the radial direction and communicating between the first flow path and the cavity,
2. The plurality of central insert members are different in the number of radial flow passages or in cross-sectional shape of the flow passages, and any one of them can be detachably attached to the fixed mold as the gate insert. 2. The mold device according to 2. A fixed mold and a movable mold that can move forward and backward with respect to the fixed mold are provided. A mold device for molding a molded product,
The fixed mold is formed with a first flow path connected to a nozzle of an injection molding machine that injects a fluid material,
The cavity portion has a disk shape in plan view along the axis of the first flow path,
The fixed mold includes a gate insert formed with a second flow path extending radially with respect to the axis and communicating between the first flow path and the cavity portion; at least one split insert that splits the cavity portion along the circumferential direction with respect to the axis is detachably provided,
A part of the mold surface of the movable mold that forms the cavity surface of the cavity portion is constituted by a movable mold insert that is detachably attached to the movable mold,
A mold apparatus, wherein at least one concave portion is formed on the surface of the movable mold insert. A test method for verifying the fluidity of a fluid material in a cavity formed between a fixed mold and a movable mold that can move back and forth with respect to the fixed mold,
The fixed mold is formed with a first flow path connected to a nozzle of an injection molding machine that injects a fluid material,
The cavity portion has a disk shape in plan view along the axis of the first flow path,
A plurality of sensors are provided on a mold surface forming a cavity surface of the cavity portion of the movable mold,
A gate insert in which a second flow path extending radially with respect to the axis and communicating between the first flow path and the cavity is formed; A step of installing at least one split insert that is split along the circumferential direction on the fixed mold;
bringing the movable mold closer to the fixed mold to connect the first channel and the second channel;
and a step of injecting a fluid material from the injection molding machine into the first flow path, and measuring the state inside the cavity by the plurality of sensors while filling the cavity with the fluid material. test method.

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