JP5978538B2 - Cleaning pin - Google Patents

Description

  The present invention relates to a cleaning pin.

Conventionally, a molding die having a built-in chill vent is known (see, for example, Patent Document 1).
).
FIG. 23 is a longitudinal sectional view of a conventional molding die 1010.
FIG. 24 is a longitudinal sectional view of a built-in chill vent 1200 in a conventional molding die 1010.

As shown in FIG. 23, a conventional molding die 1010 has an annular cavity 1130 at the time of molding.
And a built-in mold chill vent 1200 disposed at a position surrounded by a cavity 1130. The molding mold body 1100 includes a fixed mold 1110 and a movable mold 1120. As shown in FIG. 24, the built-in chill vent 1200 includes a fixed side block 1220 attached to the fixed side mold 1110 and a movable side block 1 attached to the movable side mold 1120.
270, gas passages 1212 for allowing the gas from the cavity 1130 to pass through and cooling and solidifying the molten molding material and the gas and the molten molding material into the cavity are opposed to the opposed surfaces of the fixed block 1220 and the movable block 1270. 1130 to gas passage 1212
A gas introduction path 1210 for introducing the gas into the gas is formed. A gas discharge path 121 for discharging gas from the gas passage 1212 is provided in the fixed mold 1110 and the fixed block 1220.
4 is formed.

Although not shown, an ejector pin mold through hole is formed in the fixed mold 1110 or the movable mold 1120 so as to be exposed to the cavity 1130, and an ejector for extruding a molded product after molding. The pin is configured to reciprocate according to a predetermined procedure in the ejector pin die through hole. In FIG. 23, reference numeral 1140 indicates a melt molding material extrusion apparatus, reference numeral 1142 indicates a melt molding material, reference numeral 1150 indicates a built-in chill vent cooling apparatus, and reference numeral 1300 indicates an external chill vent.

According to the conventional molding die 1010, the built-in chill vent 12 is located at a position surrounded by the cavity.
00 is provided, so that even when an annular molded product is manufactured, the gas contained in the melt-molded material can be discharged from the inside of the cavity, and as a result, the gas mixing amount is small. It becomes possible to produce high-quality molded products.

JP 2008-080391 A

By the way, in the conventional molding die 1010, if a part of the melt molding material flows into a place (gas exhaust path 1214) beyond the outlet of the gas passage path 1212, the gas passage path The molding material will solidify at a location beyond the outlet. In this case, it is difficult to remove the molding material that has solidified in a place beyond the outlet of the gas passage, so that there is a problem that the gas discharge function after dripping is lowered.

Therefore, the present invention has been made to solve the above-described problem, and even if a part of the melt molding material is solidified in a place beyond the outlet of the gas passage, It is an object of the present invention to provide a molding die that makes it possible to remove a molding material that has solidified in a place beyond the exit of a passage. It is another object of the present invention to provide a cleaning pin for use in such a molding die.

[1] The molding die of the present invention includes a molding die body having a stationary mold and a movable mold that form an annular cavity during molding, a stationary block attached to the stationary mold, and the movable A gas passage for passing a gas from the cavity and cooling and solidifying a molten molding material on a facing surface of the fixed side block and the movable side block; A molding die including a gas introduction path for introducing the gas and the molten molding material from the cavity into the gas passage, and a built-in chill vent disposed at a position surrounded by the cavity. The movable-side mold and the movable-side block include a gas discharge movable-side mold through hole and a gas continuity with each other at a position beyond the outlet of the gas passage. The discharge movable side block through hole is formed, and the molding die is a cleaning pin having a gas vent hole formed therein, and the gas discharge movable side mold through hole and the gas discharge movable By reciprocating in the side block through-hole, the gas is discharged from the gas passage through the gas vent hole at the time of molding, and after molding, the gas discharge movable side is operated by the function of the tip of the pin. It further comprises a cleaning pin having a function of removing a molding material that may adhere to the inner peripheral surface of the block through-hole.

For this reason, according to the molding die of the present invention, since the built-in chill vent is disposed at a position surrounded by the cavity, even when an annular molded product is manufactured, it is included in the melt molding material. Gas can be discharged from the inside of the cavity, and as a result, a high quality molded product can be manufactured with a small amount of gas mixing.

Further, according to the molding die of the present invention, as a cleaning pin, among the gas discharge movable side mold through hole and the gas discharge movable side block through hole formed at a position beyond the outlet of the gas passage. Even if a part of the melt molding material has solidified in a place beyond the outlet of the gas passage (ie, the inlet of the movable block through hole for gas discharge) because the cleaning pin that reciprocates is provided. Thus, it is possible to remove the molding material that has solidified in a place beyond the outlet of the gas passage.

The molding die according to the present invention includes a cleaning pin having a gas vent hole formed therein as a cleaning pin, so that the gas flowing outward from the gas passage due to the introduction of the cleaning pin is provided. There is no hindrance to the flow.

Preferred examples of the mold of the present invention include injection molds such as metal injection molds (for example, die casting molds, gravity casting molds and low pressure casting molds), and resin injection molds. it can. Further, as materials for the molding die main body and the built-in chill vent, various metal materials for molds (for example, SKD61 (particularly in the case of a metal injection molding die), SKD11, DC53, and SUS420J2 (particularly resin injection molding die). In the case of (2), it is preferable to illustrate.

In the molding die of the present invention, the annular cavity refers to a cavity having a structure capable of disposing a built-in chill vent at a position surrounded by the cavity, and the annular cavity is angular. Also included are cavities having an outer shape and cavities having a shape in which a part of the ring is missing, such as a C-shape.

[2] In the molding die of the present invention, the gas discharge movable side mold through hole and the gas discharge movable side block through hole are parallel to a direction in which an ejector pin in the molding die reciprocates. Preferably, the cleaning pins are reciprocated in conjunction with the ejector pins.

With such a configuration, the cleaning pin reciprocates in conjunction with the ejector pin. Therefore, it is not necessary to prepare a dedicated drive mechanism for reciprocating the cleaning pin, and the cleaning pin is introduced. Therefore, the structure is not complicated.

In the molding die of the present invention, it is preferable that the tip of the cleaning pin is arranged with a gap from the outlet of the gas passage at the time of molding. By adopting such a configuration, even if a part of the melt molding material has been introduced to a place beyond the outlet of the gas passage, the melt molding material is disposed in the gap up to the cleaning pin. Since it becomes possible to cool and solidify, it can suppress that the situation where a cleaning pin solidifies with a molding material generate | occur | produces.

[3] In the molding die of the present invention, the cleaning pin is composed of a pin main body portion in which a gas vent hole is formed along the longitudinal direction, and only the gas among the gas and the melt molding material at the time of molding. It is preferable to have a cap part that has a plurality of gas introduction holes for introducing the gas into the gas vent hole and is attached to the tip part of the pin body part so as to be separable and connectable.

By adopting such a configuration, even if a part of the melt molding material reaches the tip of the cleaning pin, only the gas can be introduced into the vent hole.

In addition, even if the molding material adheres to multiple gas introduction holes, instead of replacing the entire cleaning pin, it is only necessary to replace the cap part, thus simplifying the replacement procedure. It becomes possible to do.

The size and shape of each gas introduction hole in the plurality of gas introduction holes is preferably such a size and shape that all the gas introduction holes disappear when a two-dimensional mathematical expansion treatment of 0.1 mm is applied. . By adopting such a configuration, it becomes possible to introduce only the gas into the vent hole more reliably. The two-dimensional mathematical expansion process will be described later.

[4] In the molding die of the present invention, at the distal end portion of the pin main body portion, a main body side screw portion for attaching the cap portion, and an axis alignment member positioned on the base end side of the main body side screw portion. A cylindrical portion is formed, and the base end portion of the cap portion is positioned on the distal end side of the axial alignment recess, the axial alignment recess having a shape that fits with the axial alignment column portion, and the main body A cap-side screw portion having a structure corresponding to the side screw portion, and the cap portion is aligned with the axial alignment column portion and the axial alignment recess portion, and the body-side screw portion and the It is preferable to attach to the front-end | tip part of the said pin main-body part with the cap side screw part.

By adopting such a configuration, the cap portion can be easily separated and coupled using the main body side screw portion formed in the pin main body portion and the cap side screw portion formed in the cap portion. .

When the cap part is attached to the pin body part, the cap part is axially aligned by the alignment column part and the alignment recess part, so that the cap part is securely attached to the pin body part. Is possible.

[5] In the molding die of the present invention, when the cleaning pin protrudes from the gas discharge movable block through hole, the cap portion is exposed to the outside from the gas discharge movable block through hole. It is preferable that it is comprised.

With such a configuration, when it is necessary to replace the cap portion, it is possible to replace the cap portion quickly without disassembling the molding die.

[6] In the molding die of the present invention, the outer shape of the pin main body portion and the outer shape of the cap portion are both cylindrical, the diameter of the cap portion is D1, and the diameter of the pin main body portion is D2.
It is preferable that the relationship “0 mm ≦ D2−D1 ≦ 0.05 mm” is satisfied.

Thus, since the value of D2-D1 is 0 mm or more, the diameter of the cap portion does not become larger than the diameter of the pin body portion, and the cleaning pin can be smoothly moved inside the gas discharge movable side block through hole. It can be reciprocated.
From this point of view, the value of D2-D1 is more preferably 0.01 mm or more.
By adopting such a configuration, the cleaning pin can be smoothly reciprocated inside the gas discharge movable side block through hole even when the axes of the pin main body portion and the cap portion do not completely coincide. It is possible to give a margin to the dimensional error required for the cap part,
Manufacturing can be facilitated.

On the other hand, since the value of D2-D1 is 0.05 mm or less, the adhesion of the molding material between the cap portion and the gas discharge movable side block through hole is suppressed as much as possible, and the cleaning pin removes the molding material. The function of is not impaired.

[7] In the molding die of the present invention, the movable block is formed with a horizontal hole extending from the gas discharge movable block through-hole to the outer periphery and a vertical hole extending from the horizontal hole toward the proximal end. In addition, a closing member that closes the lateral hole on the outer periphery is removably attached,
Preferably, the cleaning pin is further formed with a connecting hole for connecting the lateral hole and the gas vent hole during molding and introducing the gas from the gas vent hole into the lateral hole.

By adopting such a configuration, even if the molding material is introduced up to the horizontal hole, it becomes possible to remove the molding material by removing the closing member, thereby extending the life of the built-in chill vent. It becomes possible. In addition, gas can be discharged through the horizontal hole and the vertical hole formed in the built-in chill vent.

[8] The molding die of the present invention preferably further includes a cleaning gas introduction device for introducing a high-pressure cleaning gas from the proximal end side of the cleaning pin into the gas vent hole.

By adopting such a configuration, it becomes possible to remove the mold release agent and the molding material that may adhere to the tip of the cleaning pin by introducing a high-pressure cleaning gas into the gas vent hole.

The timing for introducing the high-pressure cleaning gas using the cleaning gas introducing device is preferably after spraying the release agent onto the cavity by the release agent spraying device before molding. By introducing a high-pressure cleaning gas at such timing, it is possible to remove the mold release agent that may adhere to the tip of the cleaning pin before molding, and to prevent the gas discharge function of the cleaning pin from deteriorating. It becomes possible.

[9] In the molding die of the present invention, the built-in chill vent has a female block as the fixed block, a male block as the movable block, and the female block is The female block main body and the female block main body have a substantially conical recess formed on the surface of the female block main body facing the male block.
The gas passage is formed between the male block main body and the male block main body in a surface facing the female block, and when the female block and the male block are combined. The gas discharge movable side block through hole is formed so as to penetrate the male block from the distal end side to the proximal end side of the convex portion, and the female A coolant channel is preferably formed inside the mold block so as to surround the recess.

By adopting such a configuration, a gas passage is three-dimensionally formed between the concave portion of the female block and the convex portion of the male block. Even if the plane area of the facing surface is not increased so much, the surface area of the gas passage can be increased. Further, since the coolant channel is formed inside the female block so as to surround the recess, the melt-molded material can be sufficiently cooled and solidified. As a result, it is possible to sufficiently cool and solidify the melt molding material without reducing the plane area of the opposing surface of the female block and the male block so much, and the built-in chill vent can be downsized. Become.

Further, by adopting such a configuration, the melt molding material shrinks and adheres to the male block side in the process of being cooled and solidified, so that the female block and the male block are easily separated. It becomes possible. As the substantially cone shape, a shape in which the upper portion of the cone shape is processed flat can be preferably exemplified. As the substantially cone shape, a substantially cone shape, a substantially elliptical cone shape, or a substantially polygonal cone shape can be preferably used. The taper angle in the cone-shaped portion is preferably in the range of 2 ° to 30 °. Within this range, it is possible to sufficiently increase the surface area of the gas passage without increasing the plane area of the opposed surfaces of the female block and the male block.

In the molding die of the present invention, the female block has a structure in which a plurality of female block components are joined or adhered, and on the surface where the plurality of female block components are joined or adhered, A refrigerant flow path is preferably formed.

With such a configuration, it is possible to relatively easily form the refrigerant flow path as described above in the female block. Further, since the refrigerant flow path can be formed in the vicinity of the gas passage, the cooling effect can be further increased, and the built-in chill vent can be further downsized.

As a method for joining a plurality of female block constituent parts, for example, (a) a joining method for joining parts to be joined formed with a groove for forming a coolant channel on a plane joining surface (JP 2007-
See 61867. ), (B) A joining method for performing a predetermined joining force strengthening process after joining the parts to be joined (International Publication No. WO2007 / 108058 and International Publication No. W)
See O2008 / 004311 pamphlet. ), (C) a joining method for joining the parts to be joined in a state where a carbon felt is arranged between each electrode and each part to be joined in the electric heating device (see International Publication No. WO2008 / 044776 pamphlet), ( d) Use of a joining method (see International Publication No. WO2008 / 129622) for joining the parts to be joined with a thin plate-like sintered steel member or other steel member interposed between the parts to be joined. Can do.

In addition, as a method of bonding a plurality of female block components, for example, a molding die body and a coolant channel forming block in which a coolant channel forming groove is formed are bonded using a heat-resistant adhesive. An adhesion method (see International Publication No. WO2006 / 030503 pamphlet) or the like can be used.

In the molding die of this invention, it is preferable that the refrigerant | coolant flow path is also formed inside the said convex part in the said male type | mold block.

By adopting such a configuration, it is possible to cool the gas passage from the male block side, so it is possible to further increase the cooling capacity and further reduce the size of the built-in chill vent. It becomes.

In the molding die of the present invention, the male block has a structure in which a plurality of male block components are joined or adhered, and on the surface where the plurality of male block components are joined or adhered, A refrigerant flow path is preferably formed.

By adopting such a configuration, it is possible to relatively easily form the refrigerant flow path as described above in the male block. Further, since the refrigerant flow path can be formed in the vicinity of the gas passage, the cooling capacity can be further increased, and the built-in chill vent can be further downsized.

[10] In the molding die of the present invention, at least one of a surface facing the male block in the female block main body and a surface facing the female block in the male block main body, It is preferable that an annular hot water storage groove is formed so as to surround the concave portion or the convex portion.

By adopting such a configuration, even when a large amount of melt molding material is introduced into the built-in chill vent, the hot water storage groove functions as a buffer zone, so that a large amount of melt molding is formed in the gas passage in the subsequent stage. It is possible to suppress the material from being vigorously introduced.

[11] In the molding die of the present invention, an ejector pin in the molding die reciprocates so that the movable side die and the movable side block are exposed to the hot water reservoir formed by the hot water reservoir groove. The second ejector pin movable side mold through hole and the second ejector pin movable side block through hole are respectively formed along the first direction parallel to the moving direction and continuous with each other. , Movable side mold through hole for the second ejector pin and the second
It is preferable to further include a second ejector pin that pushes out the molding material solidified inside the built-in chill vent after molding by reciprocating in conjunction with the ejector pin in the movable side block through hole for ejector pins. .

By having such a configuration, after the molding by the function of the second ejector pin,
It becomes possible to extrude the molding material solidified inside the built-in chill vent.

[12] In the molding die of the present invention, it is preferable that the gas passage has a continuous mountain-valley shape.

With such a configuration, since the effective length of the gas passage can be further increased, the cooling capacity can be further increased, and the built-in chill vent can be further reduced in size. In addition, since the passage speed of the melt molding material passing through the gas passage can be reduced, this also makes it possible to further increase the cooling capacity and further reduce the size of the built-in chill vent. It becomes possible.

[13] The molding die of the present invention includes a molding die body having a fixed side mold and a movable side mold that form a cavity at the time of molding, and the fixed side mold and the movable side mold at the time of molding. A mating area to be mated is a molding die formed inside the cavity, and in the butting area, the gas and the melt are formed on the opposing surfaces of the fixed side mold and the movable side mold during molding. A gas passage that allows only the gas to pass through the molding material is formed, and the movable mold has a gas discharge movable mold through hole at a position beyond the outlet of the gas passage,
The molding die is a cleaning pin having a gas vent hole formed therein, and reciprocates in the gas discharge movable side die through hole, so that the molding die can be passed through the gas vent hole during molding. The gas is discharged to the outside from the gas passage, and has a function of removing a molding material that may adhere to the inner peripheral surface of the gas discharge movable die through-hole by the function of the pin tip after molding. A cleaning pin is further provided.

For this reason, according to the molding die of the present invention, the cleaning pin is provided with a cleaning pin that reciprocates in the gas discharge movable side die through hole formed at a position beyond the outlet of the gas passage. Even if a part of the melt molding material has solidified in a place beyond the outlet of the gas passage (that is, the inlet of the gas discharge movable side mold through hole), the outlet of the gas passage It becomes possible to remove the molding material which has solidified in a place beyond the range.

The molding die according to the present invention includes a cleaning pin having a gas vent hole formed therein as a cleaning pin, so that the gas flowing outward from the gas passage due to the introduction of the cleaning pin is provided. There is no hindrance to the flow.

[14] In the molding die of the present invention, the gas discharge movable side die through-hole is formed along a first direction parallel to a direction in which the ejector pin in the molding die reciprocates, It is preferable that the cleaning pin reciprocates in conjunction with the ejector pin.

By adopting such a configuration, an effect similar to the effect described in the above [2] can be obtained.

[15] In the molding die of the present invention, the cleaning pin includes only a pin main body portion in which a gas vent hole is formed along the longitudinal direction, and the gas and the melt molding material at the time of molding. It is preferable to have a cap part that has a plurality of gas introduction holes for introducing the gas into the gas vent hole and is attached to the tip part of the pin body part so as to be separable and connectable.

By setting it as such a structure, the effect similar to the effect described in said [3] is acquired. The size and shape of each gas introduction hole in the plurality of gas introduction holes and the effect thereof are the same as those described in [3] above.

[16] In the molding die of the present invention, a main body side screw portion for attaching the cap portion to the distal end portion of the pin main body portion and an axis alignment member positioned on the base end side of the main body side screw portion. A cylindrical portion is formed, and the base end portion of the cap portion is positioned on the distal end side of the axial alignment recess, the axial alignment recess having a shape that fits with the axial alignment column portion, and the main body A cap-side screw portion having a structure corresponding to the side screw portion, and the cap portion is aligned with the axial alignment column portion and the axial alignment recess portion, and the body-side screw portion and the It is preferable to attach to the front-end | tip part of the said pin main-body part with the cap side screw part.

By adopting such a configuration, an effect similar to the effect described in the above [4] can be obtained.

[17] In the molding die of the present invention, when the cleaning pin protrudes from the gas discharge movable die through hole, the cap portion is exposed to the outside from the gas discharge movable die through hole. It is preferable that it is comprised.

By setting it as such a structure, the effect similar to the effect described in said [5] is acquired.

[18] In the molding die of the present invention, the outer shape of the pin main body and the outer shape of the cap are both cylindrical, the diameter of the cap is D1, and the diameter of the pin main is D.
2, it is preferable to satisfy the relationship of “0 mm ≦ D2−D1 ≦ 0.05 mm”.

By adopting such a configuration, an effect similar to the effect described in [6] above can be obtained.

[19] The molding die of the present invention preferably further includes a cleaning gas introduction device for introducing a high-pressure cleaning gas into the gas vent hole from the base end side of the cleaning pin.

By adopting such a configuration, the same effect as described in [8] above can be obtained. The timing and effect of introducing the high-pressure cleaning gas using the cleaning gas introduction device are the same as those described in [8] above.

[20] The cleaning pin of the present invention is a cleaning pin for use in the molding die of the present invention, and has a gas vent hole formed therein, and passes the gas through the gas vent hole during molding. It is characterized by having a function of removing the molding material that is discharged from the path to the outside and, after molding, may adhere to the inner peripheral surface of the gas discharge movable side block through hole by the action of the pin tip.

For this reason, according to the cleaning pin of the present invention, the cleaning pin described above [1]
] To the molding die according to [12] or the molding die according to [13] to [19],
Even if a part of the molten molding material has solidified at a location beyond the outlet of the gas passage, the molding material that has solidified at a location beyond the outlet of the gas passage is removed. It becomes possible. In this case, according to the cleaning pin of the present invention, since the gas vent hole is formed inside, the flow of gas from the gas passage to the outside is not hindered.

[21] In the cleaning pin of the present invention, only the gas out of the gas and the melt molding material is formed in the gas vent hole in the pin main body portion in which the gas vent hole is formed along the longitudinal direction. It has a plurality of gas introduction holes for introduction and is separated at the tip of the pin body
It is preferable to have the cap part attached so that coupling | bonding is possible.

By setting it as such a structure, the effect similar to the effect described in said [3] is acquired. The size and shape of each gas introduction hole in the plurality of gas introduction holes and the effect thereof are the same as those described in [3] above.

[22] In the cleaning pin of the present invention, at the distal end portion of the pin main body portion, a main body side screw portion for attaching the cap portion, and an axis alignment cylinder located on the base end side of the main body side screw portion And the base end portion of the cap portion is positioned at the distal end side of the concave portion for axial alignment and the concave portion for axial alignment having a shape to be fitted to the cylindrical portion for axial alignment, and on the main body side A cap-side screw portion having a structure corresponding to the screw portion, and the cap portion is axially aligned by the axial alignment column portion and the axial alignment recess portion, and the main body side screw portion and the cap It is preferable to attach to the front-end | tip part of the said pin main-body part by the side screw part.

By adopting such a configuration, an effect similar to the effect described in the above [4] can be obtained.

[23] In the cleaning pin of the present invention, the outer shape of the pin main body and the outer shape of the cap are both cylindrical, the diameter of the cap is D1, and the diameter of the pin main is D2. In this case, it is preferable to satisfy the relationship of “0 mm ≦ D2−D1 ≦ 0.05 mm”.

By adopting such a configuration, an effect similar to the effect described in [6] above can be obtained.

[24] The cleaning pin of the present invention is a cleaning pin for use in the molding die according to the above [7] of the present invention, in which a gas vent hole is formed, and further, the lateral hole is formed at the time of molding. And the gas vent hole are connected, and a connecting hole for introducing the gas from the gas vent hole to the lateral hole is formed. During molding, the gas is passed through the gas vent hole and the connecting hole. It is characterized in that it has a function of removing the molding material which is discharged from the passageway to the outside and, after molding, may adhere to the inner peripheral surface of the gas discharge movable side block through hole by the action of the pin tip.

Therefore, according to the cleaning pin of the present invention, when the cleaning pin is used in the molding die described in [7] above, it is assumed that a part of the melt molding material is solidified at a location beyond the outlet of the gas passage. Even in such a case, it is possible to remove the molding material that has solidified in a place beyond the outlet of the gas passage. In this case, since the gas vent hole is formed inside, the gas flow from the gas passage to the outside is not hindered when used in the molding die of the present invention.

In addition, the cleaning pin of the present invention can be suitably used with a built-in chill vent in which a horizontal hole and a vertical hole are formed. In such a case, the cleaning pin is inserted through the horizontal hole and the vertical hole formed in the built-in chill vent. Gas can be discharged.

In addition, it is preferable that the said cleaning pin also has the characteristics described in said [21]-[23].

It is a figure shown in order to demonstrate the shaping die 10 concerning Embodiment 1. FIG. 3 is a longitudinal sectional view of a built-in chill vent 200 in the molding die 10 according to Embodiment 1. FIG. It is a figure shown in order to demonstrate the built-in type chill vent 200 in the shaping die 10 concerning Embodiment 1. FIG. It is a figure shown in order to demonstrate the female-type block 220 in the molding die 10 concerning Embodiment 1. FIG. It is a figure shown in order to demonstrate the male block 270 in the shaping die 10 concerning Embodiment 1. FIG. FIG. 5 is a view for explaining a cleaning pin 500 according to the first embodiment. FIG. 5 is a view for explaining the size and shape of a gas introduction hole 522 in the cleaning pin 500 according to the first embodiment. FIG. 6 is a view for explaining the operation of the built-in chill vent 200 and the cleaning pin 500 in the molding die 10 according to the first embodiment. FIG. 6 is a view for explaining the operation of the built-in chill vent 200 and the cleaning pin 500 in the molding die 10 according to the first embodiment. It is a figure shown in order to demonstrate the molded product 30 by the molding die 10 concerning Embodiment 1. FIG. It is a figure shown in order to demonstrate the introduction state of the melt molding material with respect to the built-in type chill vent 200 in the shaping die 10 concerning Embodiment 1. FIG. It is a figure shown in order to demonstrate the shaping die 12 concerning Embodiment 2. FIG. 6 is a longitudinal sectional view of a built-in chill vent 202 in a molding die 12 according to Embodiment 2. FIG. It is a figure shown in order to demonstrate the male type block 290 in the shaping die 12 concerning Embodiment 2. FIG. FIG. 6 is a view for explaining a cleaning pin 502 according to a second embodiment. FIG. 6 is a longitudinal sectional view of a built-in chill vent 204 in a molding die 14 (not shown) according to a third embodiment. It is a figure shown in order to demonstrate the shaping die 16 concerning Embodiment 4. FIG. It is a figure shown in order to demonstrate the shaping die 18 concerning Embodiment 5. FIG. It is a figure shown in order to demonstrate the shaping die 20 which concerns on the modification 2. As shown in FIG. FIG. 11 is a bottom view of a cap portion 540 in a cleaning pin 504 (not shown) according to Modification 3. It is a figure shown in order to demonstrate the cap part 550 in the cleaning pin 506 (not shown) which concerns on the modification 4. FIG. FIG. 10 is a bottom view of a cap portion 560 in a cleaning pin 508 (not shown) according to Modification Example 5. It is a longitudinal cross-sectional view of a conventional molding die 1010. FIG. 10 is a longitudinal sectional view of a built-in chill vent 1200 in a conventional molding die 1010.

Hereinafter, a molding die and a cleaning pin of the present invention will be described based on embodiments shown in the drawings.

[Embodiment 1]
FIG. 1 is a view for explaining a molding die 10 according to the first embodiment. FIG. 1A is a plan view of the fixed mold 110 in the molding die 10 as seen from the dividing surface of the molding die 10.
FIG. 1B is a cross-sectional view of the molding die 10 taken along the line A1-A1.
FIG. 2 is a longitudinal sectional view of the built-in chill vent 200 in the molding die 10 according to the first embodiment.
FIG. 3 is a view for explaining the built-in chill vent 200 in the molding die 10 according to the first embodiment. 3 (a) is a perspective view of the built-in chill vent 200, and FIG. 3 (b) is a perspective view of the built-in chill vent 200 in a state where the male block 270 is disassembled with the left side in the drawing, FIG. 3 (c). FIG. 4 is a perspective view of the built-in chill vent 200 in a state where the female block 220 is disassembled with the left side of the drawing.

FIG. 4 is a view for explaining the female block 220 in the molding die 10 according to the first embodiment. 4A is a longitudinal sectional view of the female block 220, FIG. 4B is a top view of the female block 220, and FIG. 4C is a female block component 250, 26.
It is a transverse cross section of female type block 220 when it cuts in the field where 0 was joined.
FIG. 5 is a view for explaining the male block 270 in the molding die 10 according to the first embodiment. 5A is a longitudinal sectional view of the male block 270, and FIG. 5B is a top view of the male block 270. FIG.
FIG. 6 is a view for explaining the cleaning pin 500 according to the first embodiment. 6A is a longitudinal sectional view of the cleaning pin 500, FIG. 6B is a longitudinal sectional view of the pin body 510, and FIG. 6C is a longitudinal sectional view of the cap 520. 6 (d) is an enlarged plan view of the cap portion 520 viewed from the gas introduction hole 522 side. 6 (a) and 6
In (b), a part of the cleaning pin 500 (the main body side screw part 514 and the centering center part 516) is shown in a plan view.

In addition, in this specification and drawing, what is provided with the same code | symbol shall have the same structure and function. Therefore, description of what has been described once will be omitted later.

As shown in FIG. 1, the molding die 10 according to the first embodiment includes a molding die body 100, a built-in die chill vent 200, three external die chill vents 300, an ejector pin 400, and a second ejector pin. 410, third ejector pin 420, and cleaning pin 500
A release agent spraying device 600 (not shown) and a cleaning gas introducing device 700.

The molding die body 100 includes a fixed side mold 110 and a movable side mold 120. At the time of molding, the fixed side mold 110 and the movable side mold 120 are formed with an annular cavity 130, a gate 140,
A first discharge path 150 to the built-in chill vent 200 and a second discharge path 160 to the external chill vent 300 are formed.
In the movable mold 120, the ejector pin movable side mold is arranged along the direction in which the ejector pin 400 reciprocates (vertical direction with respect to the paper surface in FIG. 1B, hereinafter referred to as the first direction). A through hole 170, a second ejector pin movable side mold through hole 172, a third ejector pin movable side mold through hole 174, and a gas discharge movable side mold through hole 176 are formed. The ejector pin movable side mold through-hole 170 is exposed to the cavity 130.

As shown in FIG. 1, the built-in chill vent 200 is disposed at a position surrounded by the cavity 130.
As shown in FIG. 2, the built-in chill vent 200 includes a female block 220 as a fixed block and a male block 270 as a movable block. The gas G from the cavity 130 passes through the opposing surface of the female block 220 and the male block 270, and the gas passage 212 for cooling and solidifying the molten molding material, and the gas G and the molten molding material are passed through the cavity 130. Gas introduction path 21 for introduction from the gas into the gas passage 212
0 is formed. As shown in FIG. 3, the built-in chill vent 200 has a substantially cylindrical shape. The diameter is 40 mm, for example, and the height is 80 mm, for example. The built-in chill vent 200 is made of SKD61, for example.

The female block 220 is attached to the fixed mold 110. Female block 2
As shown in FIGS. 2 and 4, 20 includes a female block main body 230 and a substantially conical recess 240 formed on a surface of the female block main body 230 facing the male block 270. The concave portion 240 has a substantially conical shape in which the upper portion of the conical shape is processed flat, and has a shape with a taper angle of 10 ° so as to become narrower toward the distal end side. The female block 220 has a female block component 2 in which a coolant flow path forming groove 252 is formed.
50, and a female block component 260 in which a refrigerant introduction hole 264, a refrigerant discharge hole 266, and a refrigerant flow path forming groove 262 are formed are joined at a joining surface. Therefore, as shown in FIG. 4C, the coolant channel 232 is formed in the female block 220 so as to surround the recess 240. As the refrigerant, for example, water can be used.

The male block 270 is attached to the movable mold 120. Male block 2
As shown in FIGS. 2 and 5, the second ejector pin movable side block through-hole 70 extends along a first direction parallel to the direction in which the ejector pin 400 reciprocates so as to be exposed to the gas introduction path 212. 278 is formed. The second ejector pin movable side block through-hole 278 is exposed to a hot water reservoir formed by a hot water reservoir groove 276 described later. Further, at the position beyond the outlet of the gas passage 212, the gas discharge movable side block through hole 2 along the first direction.
72 is formed. As shown in FIG. 1, the second ejector pin movable side mold through hole 172 and the second ejector pin movable side block through hole 278 are formed to be continuous with each other. Further, as shown in FIG. 1, the gas discharge movable-side mold through hole 176 and the gas discharge movable-side block through hole 272 are formed so as to be continuous with each other.

The male block 270 is formed on the male block main body 280 and a surface of the male block main body 280 facing the female block 220. When the female block 220 and the male block 270 are combined, A gas discharge movable side block through-hole 272 having a convex portion 282 having a shape such that a gas passage 212 is formed therebetween.
Is formed so as to penetrate the male block 270 from the distal end side to the proximal end side of the convex portion 282. The convex portion 282 has a shape corresponding to the concave portion 240, that is, a substantially conical shape with a taper angle of 10 ° so as to become narrower toward the distal end side. Male block body 2
80, a gas introduction channel groove 274 and an annular hot water reservoir groove 27 so as to surround the convex portion 282.
6 is formed.

As shown in FIG. 1, the external chill vent 300 includes a fixed side block 310 and a movable side block 320. Although the detailed explanation by illustration is omitted, the movable side block has a third ejector pin movable side block through hole so as to communicate with the third ejector pin movable side mold through hole 174.

The ejector pin 400 reciprocates according to a predetermined procedure in the ejector pin movable-side mold through hole 170 to extrude a molded product after molding.
The second ejector pin 410 is reciprocated in conjunction with the ejector pin 400 in the second ejector pin movable-side mold through hole 172 and the second ejector pin movable-side block through hole 278, thereby forming the second ejector pin 410 after molding. The molding material solidified inside the built-in chill vent 200 is extruded.
The third ejector pin 420 is reciprocated in conjunction with the ejector pin 400 in the third ejector pin movable side mold through hole 174 and the third ejector pin movable side block through hole, and after molding, The molding material solidified inside the external chill vent 300 is extruded.

Ejector pin 400, second ejector pin 410, third ejector pin 420
The cleaning pin 500 is connected to the ejector pin driving mechanism 430. As shown in FIG. 1, the ejector pin drive mechanism 430 includes an insertion plate 432 through which each pin is inserted, a fixing plate 434 that fixes each of the pins, an insertion plate 432, and a fixing plate 43.
And a driving device (not shown) for driving 4. An air supply hole 440 is formed in the insertion plate 432 in a direction along the first direction, and the air supply hole 440 is connected to a gas vent hole 512 (described later) in the cleaning pin 500. As the ejector pin drive mechanism 430 reciprocates, each pin connected to the ejector pin drive mechanism 430 also reciprocates.

As shown in FIG. 6, the cleaning pin 500 includes a pin body portion 510 and a pin body portion 51.
And a cap portion 520 attached to the leading end portion of the zero so as to be separable and connectable. The cleaning pin 500 reciprocates in conjunction with the ejector pin 400 in the gas discharge movable die through-hole 176 and the gas discharge movable block through-hole 272, thereby allowing the cleaning pin 500 to pass through the gas vent hole 512 during molding. Gas G is discharged from the gas passage 212 to the outside, and after molding, a molding material that may adhere to the inner peripheral surface of the gas discharge movable side block through hole 272 by the action of the pin tip (cap portion 520). Has the function of removing. The cleaning pin 500 is configured such that the tip of the cleaning pin 500 is disposed with a gap from the outlet of the gas passage 212 at the time of molding (see FIG. 2).

As shown in FIG. 6B, the pin main body 510 has a vent hole 512 along the longitudinal direction.
Is formed. At the distal end portion of the pin main body portion 510, a main body side screw portion 514 for attaching the cap portion 520 and an axial alignment column portion 51 located on the proximal end side of the main body side screw portion 514 are provided.
6 are formed. Reference sign D2 indicates the diameter of the pin main body 510. D2 is 8
. 00 mm.

As shown in FIGS. 6C and 6D, the cap part 520 has a plurality of gas introduction holes 522 for introducing only the gas G into the gas vent holes 512 during molding. Cap section 520
The base end portion of the shaft has a structure that corresponds to the main body side screw portion 514 and is located on the distal end side of the shaft alignment recess 526 and has a shape that fits the shaft alignment column 516. A cap-side screw portion 528 is formed. Reference symbol D1 indicates the diameter of the cap portion 520. D1 is 7.97 mm.
The cap portion 520 is attached to the distal end portion of the pin main body portion 510 by the main body side screw portion 514 and the cap side screw portion 528 in a state where the cap portion 520 is aligned by the axial alignment column portion 516 and the axial alignment concave portion 526. .

The cleaning pin 500 is configured such that when the cleaning pin 500 protrudes from the gas discharge movable side block through hole 272, the cap portion 520 is exposed to the outside from the gas discharge movable side block through hole 272 ( (Refer FIG.9 (b) mentioned later.).

The gas introduction hole 522 is a cylindrical hole having a diameter of 0.1 mm and a depth of 3 mm. The size and shape of the gas introduction hole 522 are such a size and shape that all the gas introduction holes disappear when a two-dimensional mathematical expansion treatment of 0.1 mm is applied. The two-dimensional mathematical expansion process in this case is a process of expanding the cap unit 520 by 0.1 mm from each contour portion of the cap unit 520 when the cap unit 520 is viewed from the distal end side of the cap unit 520. That is.

FIG. 7 is a view for explaining the size and shape of the gas introduction hole 522 in the cleaning pin 500 according to the first embodiment. FIG. 7A shows the gas introduction hole 5 in the first embodiment.
FIG. 7B is a plan view before applying the two-dimensional mathematical expansion process to No. 22, and FIG. 7B is a diagram after applying the 0.1 mm two-dimensional mathematical expansion process to the gas introduction hole 522 in the first embodiment. FIG. 7C is a plan view before applying a two-dimensional mathematical expansion process to the gas introduction hole 522a in the first modification, and FIG. 7D is a gas introduction hole in the first modification. FIG. 7E is a plan view after applying a two-dimensional mathematical expansion process of 0.1 mm to 522a, and FIG. 7E is a plane before applying the two-dimensional mathematical expansion process to the gas introduction hole 522b in the comparative example. FIG. 7 (f) shows 0.1 m for the gas introduction hole 522 b in the comparative example.
It is a top view after applying the two-dimensional mathematical expansion process of m.
In addition, the planar shape of the gas introduction hole 522a in the modification 1 is a rectangle, and the short side is 0.1.
mm, the long side is 0.3 mm, the planar shape of the gas introduction hole 522b in the comparative example is a circle, and the diameter is 0.3 mm.

In this case, in the case of the gas introduction hole 522b in the comparative example, the gas introduction hole 522a does not disappear even if the two-dimensional mathematical expansion process of 0.1 mm is applied (see FIG. 7F). On the other hand, in the case of the gas introduction hole 522 in the first embodiment, the gas introduction hole 522 disappears when a two-dimensional mathematical expansion process of 0.1 mm is applied (FIG. 7B). Incidentally, in the case of the gas passage hole 522a in the first modification, the long side is long but the short side is short, so
When the two-dimensional mathematical expansion process of m is applied, the gas introduction hole 522 disappears (see FIG. 7D).

The mold release agent spraying device 600 (not shown) includes a fixed mold 110 and a movable mold 12 before molding.
A release agent is sprayed on the surface facing 0 (particularly the surface forming the cavity 130). As the release agent, for example, a silicon release agent suspended in water can be used. In addition, a mold release agent is not restricted to the said thing, The optimal thing can be used according to a use or an environment.

The cleaning gas introduction device 700 includes a gas vent hole 512 from the base end side of the cleaning pin 500.
Is a device for introducing a high-pressure cleaning gas into the pipe. The cleaning gas introduction device 700 includes a three-way valve 710.
The cleaning pin 500 is connected via the air supply pipe 730 and the air supply hole 440. The three-way valve 710 connects the air supply pipe 730 and the exhaust pipe 720 at the time of molding, and connects the air supply pipe 730 and the cleaning gas introduction device 700 after the mold release agent spraying apparatus 600 sprays the release agent after molding. Is configured to do. Accordingly, at the time of molding, the exhaust pipe 7 is operated by the action of the three-way valve 710.
The gas can be discharged from 20 to the outside. On the other hand, after molding, after the release agent spraying device 600 sprays the release agent, the high-pressure cleaning gas can be introduced from the cleaning gas introduction device 700 into the gas vent hole 512 by the action of the three-way valve 710. it can.
For example, air can be used as the cleaning gas. Air supply tube 730 and air supply hole 44
0 is attached by an attachment tool (not shown).

Next, a method for using the built-in chill vent 200 and the cleaning pin 500 in the molding die 10 according to the first embodiment will be described.

FIGS. 8 and 9 are views for explaining the operation of the built-in chill vent 200 and the cleaning pin 500 in the molding die 10 according to the first embodiment. FIG. 8A is a longitudinal sectional view showing the built-in chill vent 200 and the cleaning pin 500 immediately before molding.
FIG. 8B is a longitudinal sectional view showing the built-in chill vent 200 and the cleaning pin 500 during the molding process, and FIG. 8C shows that the female block 220 and the male block 270 are slightly separated after the molding process. FIG. 9A is a longitudinal sectional view showing the built-in chill vent 200 and the cleaning pin 500 at the time, and FIG. 9A shows the built-in chill vent 200 and the cleaning when the female block 220 and the male block 270 are completely separated after molding. FIG. 9B is a longitudinal sectional view showing the built-in chill vent 200 and the cleaning pin 500 when the second ejector pin 410 and the cleaning pin 500 are projected, and FIG. c) The second ejector pin 410 and the cleaning pin 500 are moved to the first position. The return, gas pressure cleaned gas release openings 512 C (air)
It is a longitudinal cross-sectional view which shows the built-in type chill vent 200 and the cleaning pin 500 when introduce | transducing.

1. Mounting of built-in type chill vent 200 etc. The built-in type chill vent 200 is located at a position surrounded by the cavity 130 in the fixed side mold 110.
The female block 220 is attached, and the cavity 130 in the stationary mold 110 is attached.
The fixed side block 310 in the externally attached chill vent 300 is attached to the outside. Similarly,
A male block 270 in the built-in chill vent 200 is attached to a position surrounded by the cavity 130 in the movable mold 120, and a movable block 320 in the external mold chill vent 300 is attached outside the cavity 130 in the movable mold 120.

2. Spraying of mold release agent and introduction of cleaning gas The mold release agent spraying apparatus 600 sprays the mold release agent onto the opposing surface (particularly the surface forming the cavity 130) between the fixed mold 110 and the movable mold 120. To do. Thereafter, the three-way valve 710 connects the air supply pipe 730 and the cleaning gas introduction device 700, and the cleaning gas introduction device 700 introduces the high-pressure cleaning gas C from the proximal end side of the cleaning pin 500 to the gas vent hole 512. To do. As a result, the release agent that may adhere to the plurality of gas introduction holes 522 of the tip portion (cap portion 520) of the cleaning pin 500 is removed (see FIG. 9C).

3. Molding mold 10 set The movable mold 120 (and the male block 270 in the built-in chill vent 200 and the movable block 320 in the external chill vent 300) is lowered from above the fixed mold 110 and the ejector pin drive mechanism. 430 is lowered, and the molding die 10 is set in a state where it can be molded (see FIG. 1). At this time, the second ejector pin 410 is inserted into the movable side block through hole 278 for the second ejector pin. The tip of the ejector pin 420 is located at the bottom of the hot water reservoir groove 276 (see FIG. 8A). Before moving to the next molding process, the air supply pipe 730 and the exhaust pipe 720 are connected by the three-way valve 710.

4). Molding Process A molten molding material is injected into the cavity 130 through the gate 140 of the molding die 10. After filling the cavity 130, the melt molding material passes through the first discharge path 150 toward the built-in chill vent 200 and passes through the second discharge path 160 toward the external chill vent 300. At this time, the gas contained in the melt molding material is also discharged from the inside of the cavity 130. For this reason, it becomes possible to manufacture a high-quality molded product with a small gas mixing amount. The gas introduced into the built-in chill vent 200 includes a gas passage 212, an inlet of the gas discharge movable side block through-hole 272, a plurality of gas introduction holes 522, a gas vent hole 512, an air feed hole 440, an air feed pipe 730, three-way It passes through the valve 710 and the exhaust pipe 720 in order, and is discharged to the outside. The melt molding material introduced into the built-in chill vent 200 is cooled and solidified at the gas passage 212 as shown in FIG. FIG. 8B shows a case where the melt molding material is introduced to a position beyond the outlet of the gas passage 212 (that is, the inlet of the gas discharge movable side block through-hole 272).
8 and 9, reference numeral M <b> 1 indicates a molding material solidified in the built-in chill vent 200 from the gas introduction path 210 to the gas passage path 212. On the other hand, the symbol M2 indicates a molding material solidified at a location beyond the outlet of the gas passage.

5. Removal of Movable Side Mold 120 After the molding process is completed, as shown in FIGS. 8C and 9A, the movable side mold 120 (
In addition, the ejector pin driving mechanism 430 is raised together with the male block 270 and the movable block 320).
In this specification, raising the movable mold 120 or the like is used to mean raising the movable die 120 or the like with respect to the paper surface of FIGS. 8 to 9, and actually, in addition to the case of raising along the vertical direction. It also includes the case of moving along the direction orthogonal to the vertical direction. In short, the fixed mold 110
This means that the movable mold 120 is moved along the separating direction.

6). Thereafter, when the movable mold 120 (and the ejector pin drive mechanism 430) is further raised, the molded product 30 (described later) in the mold 10 is raised, as shown in FIG. 9 (a). The molding materials M1 and M2 in the built-in chill vent 200 also rise. Thereafter, the movable mold 120 (and the male block 270, the movable block 320, and the ejector pin drive mechanism 430).
) Is sufficiently raised, the movable mold 120 (and the male block 270, the movable block 320, and the ejector pin drive mechanism 430) are stopped from rising, and then only the ejector pin drive mechanism 430 is lowered. Then, the ejector pin 400 and the third ejector pin 420 push out the cooling and solidified molding material in the molded product 30 (described later) and the external chill vent 300, and as shown in FIG. 9B, the second ejector pin. 41
0 pushes out the molding material M1 adhering to the male block 270, and the cleaning pin 500 pushes out the molding material M2. At this time, the molding material M1 falls together with the molding product 30, but all or part of the molding material M2 remains attached to the cap portion 520 of the cleaning pin.

7). Next, only the ejector pin drive mechanism 430 is raised, and the positional relationship between the movable mold 120, the second ejector pin 410, and the cleaning pin 500 is the positional relationship during the molding process. Return to. Thereafter, the mold release agent spraying apparatus 600 sprays the mold release agent on the opposing surface (particularly, the surface forming the cavity 130) between the fixed mold 110 and the movable mold 120. After spraying the mold release agent, the three-way valve 710 connects the air supply pipe 730 and the cleaning gas introducing device 700, and the cleaning gas introducing device 700 performs high-pressure cleaning from the proximal end side of the cleaning pin 500 to the gas vent hole 512. Gas C is introduced. Accordingly, the mold release agent and the molding material M2 that may adhere to the plurality of gas introduction holes 522 in the tip portion of the cleaning pin 500 and the cap portion 520.
Is removed (see FIG. 9C). Thereby, the inner peripheral surface of the gas discharge movable side block through-hole 272 in the male block 270 and the plurality of gas introduction holes 522 in the cleaning pin 500 are always kept clean.
After the above, 3. ~ 7. This process can be stably repeated.

8). Finishing Processing of Molded Product FIG. 10 is a view for explaining the molded product 30 by the molding die 10 according to the first embodiment. 10A and 10B are perspective views of the molded product 30 with burrs 32, 34, and 36 as viewed from different directions, and FIG. 34,
It is a perspective view when the molded product 30 in the state where 36 is removed is viewed from the same direction as in the case of FIG.

As shown in FIGS. 10 (a) and 10 (b), the molded product 30 immediately after removal from the movable side mold 120 has a gate 140, a first discharge path 150, a second discharge path 160, The burrs 32, 34, and 36 made of a molding material cooled and solidified inside the built-in chill vent 200 and the external chill vent 300 are attached. Therefore, after removing these burrs 32, 34, and 36, the burrs 32, 3 are finished as shown in FIG.
4, 36 of the molded product 30 in a removed state can be obtained.

Thus, the molded product 30 is a molded product manufactured using the molding die 10 according to the first embodiment.

  Hereinafter, effects of the molding die 10 and the cleaning pin 500 according to the first embodiment will be described.

According to the molding die 10 according to the first embodiment, since the built-in chill vent 200 is disposed at a position surrounded by the cavity 130, even when the annular molded product 30 is manufactured,
The gas contained in the melt molding material can be discharged from the inside of the cavity 130. As a result, the amount of gas mixing is small, and a high-quality molded product 30 can be manufactured.

Further, according to the molding die 10 according to the first embodiment, the gas discharge movable side mold through-hole 176 and the gas discharge movable side formed as the cleaning pins 500 at positions beyond the outlet of the gas passage 212. Since the cleaning pin 500 that reciprocates in the block through-hole 272 is provided, it is assumed that a part of the melt-molded material exceeds the outlet of the gas passage 212 (that is, the inlet of the gas discharge movable side block through-hole 272). Even if it has solidified, it becomes possible to remove the molding material that has solidified in a place beyond the outlet of the gas passage 212.

Further, according to the molding die 10 according to the first embodiment, since the cleaning pin 500 includes the cleaning pin 500 in which the gas vent hole 512 is formed, the gas is generated due to the introduction of the cleaning pin 500. The flow of gas from the passage 212 to the outside is not obstructed.

Further, according to the molding die 10 according to the first embodiment, the cleaning pin 500 described above is
Since it reciprocates in conjunction with the ejector pin 400, the cleaning pin 500
There is no need to prepare a dedicated drive mechanism for reciprocating the lens, and the structure is not complicated due to the introduction of the cleaning pin 500.

Further, according to the molding die 10 according to the first embodiment, the cleaning pin 50 is used during molding.
Since the tip of 0 is arranged so as to be separated from the outlet of the gas passage 212 and the gap,
Even if a part of the melt molding material is introduced to a place beyond the outlet of the gas passage 212, the melt molding material can be cooled and solidified in the gap up to the cleaning pin 500. The occurrence of the situation where the cleaning pin 500 is hardened together with the molding material can be suppressed.

Further, according to the molding die 10 according to the first embodiment, since the cleaning pin 500 includes the cap portion 520 having the plurality of gas introduction holes 522, a part of the melt molding material is temporarily reached to the tip portion of the cleaning pin 500. Even in the case where it has reached, only the gas can be introduced into the vent hole 512.

In addition, according to the molding die 10 according to the first embodiment, the cap portion 520 has the pin main body portion 510.
Is attached to the front end of the cap so as to be separable and connectable. Even if the molding material adheres to the plurality of gas introduction holes 522, the entire cleaning pin 500 is not replaced. It is only necessary to replace 520, and the procedure for the replacement can be simplified.

Further, the size and shape of the gas introduction hole 522 are the size and shape in which all the gas introduction holes 522 disappear when a two-dimensional mathematical expansion treatment of 0.1 mm is applied. It becomes possible to introduce into the hole 512.

Further, according to the molding die 10 according to the first embodiment, the main body side screw portion 514 is formed at the distal end portion of the pin main body portion 510, and the base end portion of the cap portion 520 corresponds to the main body side screw portion 514. Since the cap-side screw portion 528 having the structure is formed, the cap portion 520 is formed using the body-side screw portion 514 formed on the pin body portion 510 and the cap-side screw portion 528 formed on the cap portion 520. It can be easily separated and combined.

In addition, according to the molding die 10 according to the first embodiment, the axis alignment column 516 is formed at the distal end of the pin main body 510, and the axis alignment column 516 is formed at the base end of the cap 520. Since the alignment recess 526 having a fitting shape is formed, when the cap portion 520 is attached to the pin main body portion 510, the cap portion 520 is aligned with the alignment column portion 51.
6 and the alignment recess 526, and the cap 520 can be attached to the pin body 510 in a state where the alignment is ensured.

Further, according to the molding die 10 according to the first embodiment, when the cleaning pin 500 protrudes from the gas discharge movable side block through-hole 272, the cap portion 520 is exposed from the gas discharge movable side block through-hole 272 to the outside. The cap portion 520 is configured to be exposed.
When it is necessary to replace the cap part 5 quickly without disassembling the molding die 10
20 can be exchanged.

Moreover, according to the molding die 10 which concerns on Embodiment 1, the value of D2-D1 is 0 mm or more (D2-
D1 = 0.03 mm), the diameter of the cap portion 520 does not become larger than the diameter of the pin body portion 510, and the cleaning pin 500 reciprocates smoothly inside the gas discharge movable side block through hole 272. It becomes possible to make it.

Moreover, since the value of D2-D1 is 0.01 mm or more (D2-D1 = 0.03 mm),
Even when the axes of the pin body 510 and the cap 520 do not completely coincide with each other, the cleaning pin 500 can be smoothly reciprocated inside the gas discharge movable side block through-hole 272, and the cap It is possible to provide a margin for the dimensional error required for 520 and facilitate manufacture.

Moreover, since the value of D2-D1 is 0.05 mm or less (D2-D1 = 0.03 mm),
Adhering of the molding material between the cap part 520 and the gas discharge movable side block through hole 272 is suppressed as much as possible, and the function of the cleaning pin 500 for removing the molding material is not impaired.

Further, according to the molding die 10 according to the first embodiment, since the mold release agent spray device 600 and the cleaning gas introduction device 700 are provided, by introducing a high-pressure cleaning gas into the gas vent hole 512, It becomes possible to remove the mold release agent and the molding material that may adhere to the tip of the cleaning pin 500.

Further, according to the molding die 10 according to the first embodiment, the timing when the high-pressure cleaning gas is introduced using the cleaning gas introduction device is the cavity 1 by the release agent spraying device 600 before the molding.
Since the mold release agent is sprayed on the mold 30, the mold release agent that may adhere to the tip of the cleaning pin 500 is removed before molding to prevent the gas discharge function of the cleaning pin 500 from deteriorating. It becomes possible.

In addition, according to the molding die 10 according to the first embodiment, the female block 220 has the recess 240.
The male block 270 has a convex portion 282 having a shape such that the gas passage 212 is formed between the female block 220 and the male block 270 when the female block 220 and the male block 270 are combined. The gas passage 212 is three-dimensionally formed between the concave portion 240 of the mold block 220 and the convex portion 282 of the male block 270, and the plane of the opposing surface between the female block 220 and the male block 270 is formed. Even if the area is not increased so much, the surface area of the gas passage 212 can be increased. Further, since the coolant channel 232 is formed inside the female block 220 so as to surround the recess 240, the melt-molded material can be sufficiently cooled and solidified. As a result, the melt molding material can be sufficiently cooled and solidified without increasing the plane area of the opposing surface of the female block 220 and the male block 270 so that the built-in chill vent 200 can be downsized. Is possible.

Further, according to the molding die 10 according to the first embodiment, since the recess 240 is substantially conical, the melt molding material shrinks in the process of being cooled and solidified and adheres to the male block side 270, The female block 220 and the male block 270 can be easily separated.

Further, according to the molding die 10 according to the first embodiment, the female block 220 has a structure in which a plurality of female block components 250 and 260 are joined or bonded, and the plurality of female block components 250. , 260 are formed on the surface where the two or more and 260 are bonded or adhered, the refrigerant channel 232 as described above can be formed in the female block 220 relatively easily. Further, the refrigerant flow path 232 can be formed in the vicinity of the gas passage path 212, and the cooling effect can be further increased.
Can be further reduced in size.

Further, according to the molding die 10 according to the first embodiment, the annular block groove 276 is formed on the surface of the male block main body 280 facing the female block 220 so as to surround the convex portion 282. Therefore, even when a large amount of melt-molding material is introduced into the built-in chill vent 200, the hot water storage groove 276 functions as a buffer zone, and the subsequent gas passage 212
It is possible to prevent a large amount of melt molding material from being vigorously introduced.

In addition, according to the molding die 10 according to the first embodiment, the second ejector pin movable side mold through hole 172 and the second ejector pin movable side block through hole are continuous with each other along the first direction. 278 is formed, and further includes a second ejector pin 410 that reciprocates in conjunction with the ejector pin 400. Therefore, a molding material solidified inside the built-in chill vent 200 is formed by the action of the second ejector pin 410 after molding. It can be extruded.

The cleaning pin 500 according to the first embodiment has the effect due to the cleaning pin 500 as it is among the effects of the molding die 10 according to the first embodiment.

In addition, the effect of the built-in chill vent 200 was confirmed by simulating the introduction state of the melt molding material in the built-in chill vent 200 in the molding die 10 according to the first embodiment. FIG. 11 is a view for explaining the state of introduction of the melt molding material into the built-in chill vent 200 in the molding die 10 according to the first embodiment. FIG. 11A to FIG.
i) It is a figure which shows sequentially a mode that the melt molding material in the period from the start of introduction to the end of introduction is introduced.

In the built-in chill vent 200, the gas passage 212 is three-dimensionally formed between the convex portion 282 of the male block 270 and the concave portion 240 of the female block 220. Of the refrigerant flow path 232 so as to surround the recess 240.
As shown in FIG. 11, it was confirmed that the molten molding material can be sufficiently cooled and solidified. Further, even when a large amount of melt molding material is introduced into the built-in chill vent 200, the hot water storage groove 276 functions as a buffer zone, and therefore, as shown in FIG. It was confirmed that it was possible to suppress the vigorous introduction of the melt molding material.

[Embodiment 2]
The second embodiment is an embodiment corresponding to the molding die according to claim 7.
FIG. 12 is a view for explaining the molding die 12 according to the second embodiment. FIG.
) Is a plan view of the fixed-side mold 110 in the molding die 12 as seen from the split surface of the molding die 12, and FIG. 12B is a cross-sectional view of the molding die 12 taken along line A2-A2.
FIG. 13 is a longitudinal sectional view of the built-in chill vent 202 in the molding die 12 according to the second embodiment.
FIG. 14 is a view for explaining the male block 290 in the molding die 12 according to the second embodiment. FIG. 14A is a longitudinal sectional view of the male block 290, and FIG.
) Is a longitudinal sectional view of the male block 290 with the closing member 296 removed.
FIG. 15 is a view for explaining the cleaning pin 502 according to the second embodiment.
15A is a longitudinal sectional view of the cleaning pin 502, and FIG.
FIG.

The molding die 12 according to the second embodiment basically has the same configuration as the molding die 10 according to the first embodiment, but the configuration of the built-in chill vent and the cleaning pin is the molding die 10 according to the first embodiment. It is different from the case of. That is, in the molding die 12 according to the second embodiment, FIG.
As shown in FIGS. 2 to 14, the male block 290 as the movable side block includes a horizontal hole 292 that extends from the movable side block through-hole 272 for gas discharge toward the outer periphery and a vertical hole 294 that extends from the horizontal hole 292 toward the base end side. And a closing member 2 that closes the lateral hole 292 on the outer periphery.
96 is removably attached. Further, the horizontal hole 292 and the gas vent hole 512 are connected to the cleaning pin 530 at the time of molding, and gas is passed from the gas vent hole 512 to the horizontal hole 2.
Further, a connecting hole 532 for introducing the gas into 92 is formed. Accordingly, the movable mold 122 has a movable mold gas discharge hole (not shown) that is continuous with the vertical hole 294 and discharges gas to the outside. In the molding die 12 according to the second embodiment, since the gas can be discharged through the built-in chill vent 202, the air supply pipe 730 and the cleaning gas introducing device 700 are directly connected.

Thus, the molding die 12 according to the second embodiment is different from the molding die 10 according to the first embodiment in the configuration of the built-in chill vent and the cleaning pin, but the cleaning pin 502.
As described above, the cleaning pin 5 that reciprocates in the gas discharge movable-side mold through hole 176 and the gas discharge movable-side block through hole 272 formed at a position beyond the outlet of the gas passage 212.
02, as in the case of the molding die 10 according to the first embodiment, it is assumed that a part of the melt molding material exceeds the outlet of the gas passage 212 (that is, the gas discharge movable side block through-hole 272). Even when solidified at the inlet), it is possible to remove the solidified molding material at a location beyond the outlet of the gas passage 212.

Further, the molding die 12 according to the second embodiment (and the cleaning pin 502 according to the second embodiment).
), Since the closing member 296 that closes the lateral hole 292 is detachably attached on the outer periphery, even if the molding material is introduced up to the lateral hole 292, the closing member 296 is removed. The molding material can be removed, and the life of the built-in chill vent 200 can be extended. In addition, the lateral hole 292 formed in the built-in chill vent 200
In addition, gas can be discharged through the vertical holes 294.

The molding die 12 according to the second embodiment has the same configuration as that of the molding die 10 according to the first embodiment except for the configuration of the built-in chill vent and the cleaning pin, and therefore the molding according to the first embodiment. Of the effects that the mold 10 has, the corresponding effects are provided as they are.
Further, the cleaning pin 502 according to the second embodiment has the effect due to the cleaning pin 502 as it is among the effects of the molding die 12 according to the second embodiment.

[Embodiment 3]
The third embodiment is an embodiment corresponding to the molding die according to claim 12.
FIG. 16 shows the built-in chill vent 2 in the molding die 14 (not shown) according to the third embodiment.
FIG.

The molding die 14 according to the third embodiment basically has the same configuration as the molding die 12 according to the second embodiment, but the configuration of the built-in chill vent is the molding die 12 according to the second embodiment. Is different. That is, in the molding die 14 according to the third embodiment, as shown in FIG. 14, the gas passage 213 in the built-in chill vent 204 has a continuous mountain-valley shape.

Thus, the molding die 14 according to the third embodiment has a built-in chill vent configuration according to the second embodiment.
Although it is different from the case of the molding die 12 according to FIG.
13 is provided with a cleaning pin 502 that reciprocates in the gas discharge movable-side mold through hole 176 and the gas discharge movable-side block through hole 272 formed at positions beyond the 13 outlets. As in the case of the mold 12, it is assumed that a part of the melt molding material is gas passage 21.
Even when solidified at a location beyond the outlet of 3 (that is, the inlet of the gas discharge movable block through-hole 272), it solidified at a location beyond the outlet of the gas passage 213. The molding material can be removed.

Further, according to the molding die 14 according to the third embodiment, since the gas passage 213 has a continuous mountain-valley shape, the effective length of the gas passage 213 can be further increased, and the cooling capacity can be further increased. Thus, the built-in chill vent 204 can be further reduced in size. In addition, since the passage speed of the melt molding material passing through the gas passage 213 can be reduced, this also makes it possible to further increase the cooling capacity and further reduce the size of the built-in chill vent 204. It becomes possible.

Since the molding die 14 according to the third embodiment has the same configuration as the molding die 12 according to the second embodiment except for the configuration of the built-in chill vent, the molding die 12 according to the second embodiment. Among the effects possessed, the corresponding effect is maintained as it is.

[Embodiment 4]
The fourth embodiment is an embodiment corresponding to the molding die according to claim 13.
FIG. 17 is a view for explaining the molding die 16 according to the fourth embodiment. FIG.
) Is a plan view of the fixed die 112 in the molding die 17 as seen from the split surface of the molding die 16, and FIG. 17B is a cross-sectional view of the molding die 16 taken along line A3-A3.

As shown in FIG. 17, the molding die 16 according to the fourth embodiment includes a molding die body 104, three external die chill vents 300, an ejector pin 400, and a third ejector pin 420.
A cleaning pin 500, a release agent spraying device 600 (not shown), and a cleaning gas introducing device 702.

The molding die body 104 has a fixed side die 112 and a movable side die 124. At the time of molding, the fixed side mold 112 and the movable side mold 124 include a cavity 132, a gate 142, a gas passage path 152, a second discharge path 162 to the external mold chill vent 300, and a fixed side mold 112. Seven abutting regions 180 that abut against the movable side mold 124 are formed.
The gas passage 152 is provided for each butt region 180, and allows only gas to pass between the gas and the melt molding material at the time of molding. Passing only the gas in this way can be achieved by making the thickness of the gas passage 152 sufficiently small. The thickness is, for example,
0.01 mm.
The gas discharge movable die through hole 176 is formed at a position beyond the outlet of the gas passage 152 in each of the seven butted regions 180.

The cleaning pin 500 reciprocates in conjunction with the ejector pin 400 in the gas discharge movable-side mold through-hole 176, so that the gas G can be discharged from the gas passageway 152 through the gas vent hole 512 during molding. After molding, it has a function of removing the molding material that may adhere to the inner peripheral surface of the gas discharge movable-side mold through-hole 176 by the function of the pin tip (cap portion 520). There is one cleaning pin 500 for each of the seven butted areas. For this reason, the molding die 16 is provided with a total of seven cleaning pins 500.

The cleaning gas introduction device 702 is basically the cleaning gas introduction device 70 in the first embodiment.
Similar to 0, but connected to seven three-way valves 710, exhaust pipe 720, and air supply pipe 730.

The molding die 16 according to the fourth embodiment has effects other than the effects due to the built-in chill vent among the effects of the molding die 10 according to the first embodiment, that is, the following effects.

According to the molding die 16 according to the fourth embodiment, as the cleaning pin 500, a cleaning pin that reciprocates in the gas discharge movable die through-hole 176 formed at a position beyond the outlet of the gas passage 152. 500, a part of the melt molding material is assumed to be a gas passage 152.
Even when solidified at a place beyond the outlet of the gas (that is, at the inlet of the gas discharge movable die through-hole 176), it solidified at a place beyond the outlet of the gas passage 152. The molding material can be removed.

Further, according to the molding die 16 according to the fourth embodiment, the cleaning pin 500 includes the cleaning pin 500 in which the gas vent hole 512 is formed, so that the gas is generated due to the introduction of the cleaning pin 500. The flow of gas from the passage 152 to the outside is not obstructed.

Further, according to the molding die 16 according to the fourth embodiment, the cleaning pin 500 described above is
Since it reciprocates in conjunction with the ejector pin 400, the cleaning pin 500
There is no need to prepare a dedicated drive mechanism for reciprocating the lens, and the structure is not complicated due to the introduction of the cleaning pin 500.

Further, according to the molding die 16 according to the fourth embodiment, the cleaning pin 50 is formed at the time of molding.
Since the tip of 0 is arranged so as to be spaced from the outlet of the gas passage 152 and the gap,
Even if a part of the melt molding material has been introduced to a location beyond the outlet of the gas passage 152, the melt molding material can be cooled and solidified in the gap up to the cleaning pin 500. The occurrence of the situation where the cleaning pin 500 is hardened together with the molding material can be suppressed.

Further, according to the molding die 16 according to the fourth embodiment, since the cleaning pin 500 includes the cap portion 520 having the plurality of gas introduction holes 522, a part of the melt molding material is temporarily reached to the tip portion of the cleaning pin 500. Even in the case where it has reached, only the gas can be introduced into the vent hole 512.

Further, according to the molding die 16 according to the fourth embodiment, the cap portion 520 is provided with the pin body portion 510.
Is attached to the front end of the cap so as to be separable and connectable. Even if the molding material adheres to the plurality of gas introduction holes 522, the entire cleaning pin 500 is not replaced. It is only necessary to replace 520, and the procedure for the replacement can be simplified.

Further, the size and shape of the gas introduction hole 522 are the size and shape in which all the gas introduction holes 522 disappear when a two-dimensional mathematical expansion treatment of 0.1 mm is applied. It becomes possible to introduce into the hole 512.

Further, according to the molding die 16 according to the fourth embodiment, the main body side screw portion 514 is formed at the distal end portion of the pin main body portion 510, and the base end portion of the cap portion 520 corresponds to the main body side screw portion 514. Since the cap-side screw portion 528 having the structure is formed, the cap portion 520 is formed using the body-side screw portion 514 formed on the pin body portion 510 and the cap-side screw portion 528 formed on the cap portion 520. It can be easily separated and combined.

In addition, according to the molding die 16 according to the fourth embodiment, the axial alignment column 516 is formed at the distal end of the pin main body 510, and the alignment cylinder 516 and the base end of the cap 520 are provided. Since the alignment recess 526 having a fitting shape is formed, when the cap portion 520 is attached to the pin main body portion 510, the cap portion 520 is aligned with the alignment column portion 51.
6 and the alignment recess 526, and the cap 520 can be attached to the pin body 510 in a state where the alignment is ensured.

Further, according to the molding die 16 according to the fourth embodiment, when the cleaning pin 500 protrudes from the gas discharge movable-side mold through hole 176, the cap portion 520 extends from the gas discharge movable-side mold through hole 176. Since it is configured to be exposed to the outside, when it is necessary to replace the cap portion 520, the cap portion 520 can be replaced quickly without disassembling the molding die 16.

Further, according to the molding die 16 according to the fourth embodiment, the value of D2-D1 is 0 mm or more (D2-
D1 = 0.03 mm), the diameter of the cap portion 520 does not become larger than the diameter of the pin body portion 510, and the cleaning pin 500 reciprocates smoothly inside the gas discharge movable die through hole 176. It can be moved.

Moreover, since the value of D2-D1 is 0.01 mm or more (D2-D1 = 0.03 mm),
Even when the axes of the pin main body 510 and the cap 520 do not completely coincide with each other, the cleaning pin 500 can be smoothly reciprocated inside the gas discharge movable die through-hole 176, and the cap It is possible to provide a margin for the dimensional error required for the portion 520 and facilitate manufacture.

Moreover, since the value of D2-D1 is 0.05 mm or less (D2-D1 = 0.03 mm),
The molding material is prevented from adhering between the cap portion 520 and the gas discharge movable mold through-hole 176 as much as possible, and the function of the cleaning pin 500 for removing the molding material is not impaired.

Further, according to the molding die 16 according to the fourth embodiment, since the release agent spray device 600 and the cleaning gas introduction device 702 are provided, by introducing a high-pressure cleaning gas into the gas vent hole 512, It becomes possible to remove the mold release agent and the molding material that may adhere to the tip of the cleaning pin 500.

Further, according to the molding die 16 according to the fourth embodiment, the timing of introducing the high-pressure cleaning gas using the cleaning gas introduction device is the cavity 1 by the release agent spraying device 600 before the molding.
Since the mold release agent is sprayed on 32, the mold release agent that may adhere to the tip of the cleaning pin 500 is removed before molding to prevent the gas discharge function of the cleaning pin 500 from deteriorating. It becomes possible.

Further, the molding die 16 according to the fourth embodiment has the cleaning pin 5 in the butt region 180.
Since 00 is disposed, even in the molding die 16 having many butt areas 180, the gas contained in the melt-molded material is discharged through the gas passage 152 formed in the butt area 180 and melt-molded. It becomes possible to make the material flow smooth, and as a result, it is possible to manufacture a high-quality molded product with a small amount of gas mixing.

Further, the cleaning pin 500 according to the fourth embodiment has the same effect as the cleaning pin 500 according to the first embodiment.

[Embodiment 5]
The fifth embodiment is an embodiment different from the fifth embodiment corresponding to the molding die according to the thirteenth aspect.
FIG. 18 is a view for explaining the molding die 18 according to the fifth embodiment. FIG.
) Is a plan view of the fixed-side mold 114 in the molding die 18 as seen from the dividing surface of the molding die 18, and FIG. 18B is a cross-sectional view of the molding die 18 taken along line A4-A4.

The molding die 18 according to the fifth embodiment basically has the same configuration as the molding die 16 according to the fourth embodiment, but the shape and number of butting regions, the shape of the gas passage, and the number of cleaning pins are the same. This is different from the case of the molding die 16 according to the fourth embodiment. That is, in the molding die 18 according to the fifth embodiment, as shown in FIG.
For this reason, the cavity 134 can be said to be an annular cavity. Further, the gas passage 154 has a spiral shape and has one cleaning pin 500. Along with this, the molding die 18 is
Instead of the cleaning gas introduction device 702 in the fourth embodiment, a cleaning gas introduction device 700 (similar to the cleaning gas introduction device 700 in the first embodiment) is provided.

As described above, the molding die 18 according to the fifth embodiment is different from the molding die 16 according to the fourth embodiment in the shape and number of butting regions, the shape of the gas passage, and the number of cleaning pins. Since the pin 500 includes the cleaning pin 500 that reciprocates in the gas discharge movable die through hole 176 formed at a position beyond the outlet of the gas passage 154, the molding die 16 according to the fourth embodiment is provided. Similarly, a part of the melt molding material is assumed to be a gas passage 154.
Even when solidified at a place beyond the outlet of the gas (that is, at the inlet of the gas discharge movable die through hole 176), it solidified at a place beyond the outlet of the gas passage 154. The molding material can be removed.

Further, according to the molding die 18 according to the fifth embodiment, since the cleaning pin 500 is disposed in the butt region 182, the molding die 18 in which the butt region 182 is formed.
In this case, the gas contained in the molten molding material can be discharged from the inside of the cavity 134. As a result, the amount of gas mixing is small, and a high-quality molded product can be manufactured.

The molding die 18 according to the fifth embodiment has the same configuration as the molding die 16 according to the fourth embodiment, except for the shape and number of butting regions, the shape of the gas passage, and the number of cleaning pins. And having the corresponding effect as it is among the effects of the molding die 16 according to the fourth embodiment.

The molding die and the cleaning pin of the present invention have been described based on the above embodiment, but the present invention is not limited to the above embodiment. The present invention can be carried out in various modes without departing from the gist thereof, and for example, the following modifications are possible.

(1) The dimensions, the number, the material, and the shape of each component described in the above embodiments are exemplifications, and can be changed within a range not impairing the effects of the present invention.

(2) In each of the above embodiments, the air supply hole 440 is formed along the first direction.
The present invention is not limited to this. FIG. 19 is a view for explaining the molding die 20 according to the second modification. FIG. 19A is a longitudinal sectional view of the molding die 20, and FIG.
FIG. 20 is an enlarged view of a range R in FIG. In the molding die of the present invention, the air supply holes 442 may be formed perpendicular to the first direction as in the molding die 20 according to the second modification shown in FIG.

(3) In the above embodiments, the cap portion 520 in the cleaning pin has the columnar gas introduction hole 522, but the present invention is not limited to this. FIG.
These are bottom views of the cap part 540 in the cleaning pin 504 (not shown) which concerns on the modification 3. FIG. FIG. 21 is a view for explaining the cap portion 550 in the cleaning pin 506 (not shown) according to the fourth modification. 21A is a bottom view of the cap portion 550, and FIG. 21B is a longitudinal sectional view of the cap portion 550. FIG. 22 shows a fifth modification.
It is a bottom view of the cap part 560 in the cleaning pin 508 (not shown) which concerns on this.

The cap part 540 in the modification 3 has the slit-shaped gas introduction hole 542 as shown in FIG. The cap part 550 in the modification 4 has the slit-like gas introduction holes 552 and 554 having different depths as shown in FIG. The cap part 560 in the modification 5 has the gas introduction hole 562 arrange | positioned concentrically as shown in FIG. The cleaning pin of the present invention may have a plurality of gas introduction holes as described in the above modifications 2 to 4. In addition, even in such a plurality of gas introduction holes, the size and shape of each gas introduction hole is such that all the gas introduction holes disappear when a two-dimensional mathematical expansion treatment of 0.1 mm is applied. It is preferable that

(4) In each of the above embodiments, a cleaning pin having a pin body portion and a cap portion is used as a cleaning pin, but the present invention is not limited to this. For example,
You may use the cleaning pin which does not have a cap part but in which the vent hole was formed in the front-end | tip.

(5) In each of the above embodiments, the present invention has been described using a molding die provided with a cleaning gas introducing device, but the present invention is not limited to this. The molding die of the present invention may be a molding die that does not include a cleaning gas introduction device.

(6) In each of the above embodiments, the female block is configured using two female block components, but the present invention is not limited to this. For example, the female block may be configured using three or more female block components.

(7) In each of the above embodiments, a built-in chill vent having a cylindrical shape is used, but the present invention is not limited to this. For example, a built-in chill vent having an elliptical column shape or a polygonal column shape may be used.

(8) In each of the above embodiments, the present invention has been described by taking the case where the diameter of the built-in chill vent is 40 mm and the height is 80 mm as an example. However, the present invention is not limited to this. Absent. For example, the size of the built-in chill vent may be smaller (for example, 10 mm to 40 mm in diameter) or larger (for example, 40 mm to 400 mm in diameter).

(9) In each of the above embodiments, the concave and convex grains have a substantially conical shape, but the present invention is not limited to this. For example, the shape of the concave and convex portions may be a substantially elliptical cone shape, a substantially cylindrical shape, or a substantially elliptical columnar shape.

(10) In each of the above embodiments, the built-in chill vent has a female block having a concave portion and a male block having a convex portion, but the present invention is not limited to this. The built-in chill vent may have, for example, a fixed side block that does not have a concave portion and a movable side block that does not have a convex portion.

(11) In each of the above embodiments, the present invention has been described by taking as an example the case where the convex part of the male block has a substantially conical shape with a taper angle of 10 ° so as to become narrower toward the tip side. However, the present invention is not limited to this. For example, it may have a substantially conical shape with a taper angle of 2 ° to 30 ° so as to become thinner toward the tip side.

(12) In each of the above embodiments, a plurality of female block components (for example, SKD6)
Although the present invention has been described by taking a female block having a structure in which 1) is directly joined as an example, the present invention is not limited to this. For example, a female block having a structure in which a plurality of female block components are joined in a state where a thin plate-like sintered steel member (for example, ELMAX, manufactured by Woodeholm Corporation) or other steel member is interposed. Also good.

(13) In each of the above embodiments, the present invention has been described by taking a female block having a structure in which a plurality of female block components are joined. However, the present invention is not limited to this. For example, a female block having a structure in which a plurality of female block components are bonded with an adhesive may be used.

(14) In each of the above embodiments, the male block in which the coolant channel is not formed inside the convex portion is used, but the present invention is not limited to this. For example, a male block in which a coolant channel is formed inside the convex portion may be used.

(15) In each of the above embodiments, the built-in chill vent in which the hot water reservoir groove is formed in the male block is used, but the present invention is not limited to this. For example, a built-in chill vent in which a hot water sump groove is formed in a female block may be used.

10, 12, 16, 18, 20, 1010 ... molding mold, 30 ... molded product, 32, 34, 3
6 ... Burr, 100, 102, 104 ... Mold body, 110, 112, 114, 1110
... Fixed side mold, 120,122,124,126,1120 ... Moveable side mold, 130,13
2, 134, 1130 ... cavity, 140, 142 ... sprue, 150 ... first discharge path, 15
2,154,212,213,1212 ... gas passage, 160,162 ... second discharge passage, 1
70 ... movable side mold through hole for ejector pin, 172 ... movable side mold through hole for second ejector pin, 174 ... movable side mold through hole for third ejector pin, 176 ... movable side mold through hole for gas discharge Hole, 180, 182, butting area, 200, 202, 204, 1200 ...
Built-in chill vent, 210, 1210 ... gas introduction path, 220, 222 ... female block,
230, 231 ... female block main body, 240 ... recess, 250, 251, 260, 26
DESCRIPTION OF SYMBOLS 1 ... Female type | mold block component, 252,262 ... Refrigerant flow path formation groove, 264 ... Refrigerant introduction hole, 266 ... Refrigerant discharge hole, 270, 290, 291 ... Male block, 272 ... Gas discharge movable side block penetration Holes, 278... Second ejector pin movable side block through holes, 280
, 284, 285 ... male block main body, 282 ... convex, 292 ... horizontal hole, 294 ... vertical hole, 296 ... closing member, 300, 1300 ... external chill vent, 310, 1220 ... fixed side block, 320, 1270 ... movable side block, 400 ... ejector pin, 410 ... second ejector pin, 420 ... third ejector pin, 430, 450 ... ejector pin drive mechanism, 432 ... insertion plate, 434, 436 ... fixed plate, 440, 442 ... Air supply hole, 50
0, 502 ... Cleaning pins, 510, 530 ... Pin body, 512 ... Gas vent hole, 5
DESCRIPTION OF SYMBOLS 14 ... Body side screw part, 516 ... Cylinder part for axial alignment, 520, 540, 550, 560 ... Cap part, 522, 522a, 522b, 542, 552, 554, 562 ... Gas introduction hole, 526 ... Concave part for axial alignment 528... Cap side screw part, 532... Connection hole, 700 and 70
2 ... Cleaning gas introduction device, 710 ... Three-way valve, 720 ... Exhaust pipe, 730 ... Air supply pipe, 1140
... Mold molding material extruding device, 1422 ... Mold molding material, 1150 ... Built-in chill vent cooling device, 1214 ... Gas discharge passage, G ... Gas, M1, M2 ... Molding material

Claims (2)

A molding die body having a fixed mold and a movable mold for forming a cavity at the time of molding is provided , and a butting region where the fixed mold and the movable mold are abutted at the time of molding is inside the cavity. A molding die that is formed, and in the butt region, a gas that allows only the gas of gas and a melt molding material to pass through the opposing surfaces of the fixed-side die and the movable-side die during molding. A passage is formed, and the movable die has a gas discharge movable die through hole at a position beyond the outlet of the gas passage, and the molding die has a gas vent hole inside. A cleaning pin that is formed and reciprocates in the gas discharge movable side mold through-hole, thereby discharging the gas from the gas passageway to the outside through the gas vent hole during molding. , After molding The cleaning pin further includes a cleaning pin having a function of removing a molding material that may adhere to the inner peripheral surface of the gas discharge movable-side mold through-hole by the action of the tip, and the cleaning pin is a gas along the longitudinal direction. A pin main body portion in which a hole is formed, and a plurality of gas introduction holes for introducing only the gas into the gas vent hole among the gas and the melt molding material at the time of molding, A cap part that is separably attached to the tip part of the pin body, and a tip part of the pin body part includes a body side screw part for attaching the cap part and a base part of the body side screw part. An axial alignment cylindrical portion positioned on the end side is formed, and a proximal end portion of the cap portion includes an axial alignment concave portion having a shape that fits with the axial alignment cylindrical portion, and an axial alignment concave portion. Position on the tip side A cap-side thread portion having a structure corresponding to the body-side thread portion, and the cap portion is axially aligned by the shaft alignment column portion and the axis alignment recess portion, A cleaning pin for use in a molding die attached to a tip portion of the pin main body portion by a cap portion and the cap side screw portion,
Internally to the gas vent hole is formed, through said gas release openings to discharge the gas to the outside from the gas passage, the gas discharge movable mold by the action of the pin tip after molding during molding It has the function of removing the molding material that is adhered to the inner peripheral surface of the through hole,
Said pin body section, wherein the gas vent holes in the longitudinal direction are formed,
The gas only has a plurality of gas inlet for introduction into the gas vent hole, separably attached, coupled to the distal end of the pin body portion of the gas during molding and the molten molding material and which has a said cap portion,
Wherein the distal end portion of the pin main body, and the body-side threaded portion for mounting the cap portion, and the axial alignment for the cylindrical part located on the proximal side of the main body threaded portion is formed,
The proximal end portion of the cap portion, said axial alignment recess having a shape that mates with the alignment for the cylindrical portion, located on the distal end side of the recess for the axial alignment, corresponding to the main body screw portion It said cap side thread portion having a structure is formed,
The cap portion is attached to the distal end portion of the pin main body portion by the main body side screw portion and the cap side screw portion in a state where the cap portion is aligned by the axial alignment cylindrical portion and the axial alignment concave portion ,
When the cap part is viewed from the tip side of the cap part and the process of inflating the cap part from each contour part of the cap part is a two-dimensional mathematical expansion process,
The size and shape of each gas introduction hole in the plurality of gas introduction holes are such that all the gas introduction holes disappear when the two-dimensional mathematical expansion treatment of 0.1 mm is applied. Features a cleaning pin. The cleaning pin according to claim 1 ,
Both the outer shape of the pin body and the outer shape of the cap have a cylindrical shape,
A cleaning pin characterized by satisfying a relationship of “0 mm ≦ D2−D1 ≦ 0.05 mm” when the diameter of the cap portion is D1 and the diameter of the pin main body portion is D2.