WO2019230870A1 - Pin, sleeve, or bushing - Google Patents
Pin, sleeve, or bushing Download PDFInfo
- Publication number
- WO2019230870A1 WO2019230870A1 PCT/JP2019/021470 JP2019021470W WO2019230870A1 WO 2019230870 A1 WO2019230870 A1 WO 2019230870A1 JP 2019021470 W JP2019021470 W JP 2019021470W WO 2019230870 A1 WO2019230870 A1 WO 2019230870A1
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- WIPO (PCT)
- Prior art keywords
- pin
- groove
- sleeve
- outer peripheral
- peripheral surface
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/42—Removing or ejecting moulded articles using means movable from outside the mould between mould parts, e.g. robots
Definitions
- the present invention relates to a pin, a sleeve, or a nest that is inserted into a molding die and in which a groove for gas venting is formed.
- Non-Patent Document 1 Patent Documents 1 to 4
- Patent Documents 1 to 4 Patent Documents 1 to 4
- JP 2002-1776 A Japanese Patent No. 3587845 Japanese Patent No. 4678616 JP 2011-235622 A
- Non-Patent Document 1 and Patent Document 1 or 2 have a problem that the pressure at the time of gas ejection is hardly transmitted effectively and the gas venting effect is small.
- the present invention has been made to solve the above-described problems, and even with a small-diameter pin or the like, it is possible to surely vent the gas and ensure the required strength.
- the object is to provide a pin, sleeve or nest that can be made.
- the invention of claim 1 is a pin, a sleeve, or a nest inserted in a molding die that forms a cavity filled with a molten material, and the pin, the sleeve, or the nest is only the main body or the main body And a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body, and the grooves have a shallow depth with respect to the outer peripheral surface. A shallow groove portion and a deep groove portion having a deep depth with respect to the outer peripheral surface are alternately and continuously formed.
- the pin, sleeve or nest of claim 1 has a plurality of grooves formed in the longitudinal direction of the outer peripheral surface of the main body, so that even if one groove is clogged with a gas pool such as spear, other grooves It is possible to vent the gas reliably from In addition, since the shallow groove portion and the deep groove portion are alternately and continuously formed, the required strength can be ensured even with a small-diameter pin and the like, and by narrowing the flow of fluid, It is possible to prevent clogging of the groove because it becomes difficult to collect gas due to the venturi effect that can increase the flow velocity with a decrease in pressure.
- the longitudinal direction of the outer peripheral surface in which a plurality of grooves are formed means a direction away from the cavity from a tip portion adjacent to or close to the cavity.
- the invention of claim 2 is a pin, a sleeve or a nest inserted in a molding die forming a cavity filled with a molten material, and the pin, the sleeve or the nest is only a main body part or the main body part. And a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body portion, and the groove has a narrow width in the outer peripheral surface direction. The narrow portions and the wide portions having a wide width in the outer peripheral surface direction are alternately and continuously formed.
- the pin, sleeve or nest of claim 2 has a plurality of grooves formed in the longitudinal direction of the outer peripheral surface of the main body portion, so that even if one groove is clogged with a gas pool such as spear, other grooves It is possible to vent the gas reliably from In addition, since the narrow portion and the wide portion are formed alternately and continuously, the required strength can be ensured even with a small-diameter pin and the like, and by narrowing the fluid flow, It is possible to prevent clogging of the groove because it becomes difficult to collect gas due to the venturi effect that can increase the flow velocity with a decrease in pressure.
- the longitudinal direction of the outer peripheral surface in which a plurality of grooves are formed means a direction away from the cavity from a tip portion adjacent to or close to the cavity.
- the invention of claim 3 is characterized in that, in the pin, sleeve or nest of claim 1 or 2, the groove is formed by a curved surface. Therefore, when the groove formed on the curved surface is formed so that the groove shallow portion and the groove deep portion or the narrow portion and the wide portion are alternately repeated, compared with the groove not formed on the curved surface. In addition, the resistance of the fluid is reduced, the venturi effect can be enhanced, and the gas can hardly be retained, so that the clogging of the groove can be prevented.
- the plurality of grooves are formed so that all the groove deep portions or the wide portions do not overlap in the longitudinal direction. It is characterized by that. Therefore, even if it is a small diameter pin etc., since the required pin thickness is ensured, the required intensity
- the invention of claim 5 is characterized in that, in the pin, sleeve or nest of any one of claims 1 to 4, the plurality of grooves have adjacent grooves communicating with each other at a predetermined location. Therefore, even when a plurality of clogged portions of the groove are generated, a gas escape path can be ensured, so that the gas can be vented more reliably.
- the invention of claim 6 is characterized in that in the pin, sleeve or nest of any one of claims 1 to 5, a groove is formed in the collar portion. Therefore, it is possible to vent the gas from the groove formed in the collar portion.
- the groove formed in the collar portion is a plurality of grooves, and is formed on both the upper surface and the outer peripheral surface of the collar portion. It is characterized by. Therefore, the gas that has reached the vicinity of the upper surface of the collar can be discharged to the rear of the collar via the groove formed on the upper surface of the collar and the groove formed on the outer peripheral surface of the collar. .
- the invention of claim 5 can secure a gas escape path even when a plurality of clogged portions of the groove are generated, so that the gas can be vented more reliably.
- the invention of claim 6 can also perform gas venting from the groove formed in the collar portion.
- the invention according to claim 7 is that the gas that has reached the vicinity of the upper surface of the buttock is passed through the groove formed on the upper surface of the buttock and the groove formed on the outer peripheral surface of the buttock, Can be discharged.
- FIG. 1 is a cross-sectional view of a resin molding die for injection molding in which pins, sleeves or inserts according to the present invention are inserted.
- the relationship between the pin, sleeve or insert and mold according to the present invention will be described with reference to this figure.
- the mold has a mechanism in which the movable mold 14 moves with respect to the fixed mold 13 to be opened and closed. When the molten resin as a molding material is filled, the mold is closed, and when the molded product is taken out, the mold is closed. The mold is opened.
- the ejector pin 1, the product pin 3, and the sprue lock pin 6 are inserted into the respective pin holes formed in the movable mold 14 so as to be slidable.
- the ejector sleeve 2, the core pin 4, and the insert 5 are not slidable and are fixed to the respective pin holes.
- the melted resin is filled from the resin injection port 10 through the sprue 11 into the product portion 9 (sometimes referred to as a cavity) and injection molding is performed.
- the pins according to the present invention are not shown in FIG. 1 in addition to the ejector pin 1, the product pin 3, the sprue lock pin 6, and the core pin 4, but are a punch pin, a valve gate pin, etc. This corresponds to all the pins fitted in the mold while adjacent to the track through which the molten molding material including the product portion 9 and the sprue 11 passes.
- the sleeve according to the present invention is adjacent to the track through which the molten molding material including the product part 9 and the sprue 11 of the mold passes, All sleeves inserted are applicable.
- FIG. 1 an exaggerated gap is drawn between the pin and the mold for easy understanding, but it is actually a minute gap that can slide.
- the insert according to the present invention is adjacent to the track through which the molten molding material including the product portion 9 and the sprue 11 of the mold passes in addition to the insert 5 shown in FIG. All nestings inserted in are applicable.
- FIG. 2 is a perspective view of the pin according to the first embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing a state in which the pin according to the first embodiment of the present invention is inserted into a mold.
- 4A to 4D are cross-sectional views of the pin according to the first embodiment of the present invention.
- FIG. 5A is an enlarged front view of the pin of the first embodiment
- FIG. 5B is a cross-sectional view taken along the line AA in FIG.
- FIG. 6 is a front view of the pin of the first embodiment
- FIG. 7 is a front view of the pin of FIG. 6 rotated by 45 degrees. Details of the pins of the first embodiment will be described with reference to these drawings.
- the pin (ejector pin) 1 of the first embodiment has a cylindrical main body 15a and a flange 15b provided at the rear end of the main body 15a.
- four grooves 1a, 1b, 1c, and 1d are formed at positions that divide the outer periphery into four equal parts.
- the number of grooves formed in the pin, sleeve, or nest of the present invention may be two or more, and is not limited to four grooves as shown in the pin 1 of the first embodiment. .
- gas can be surely vented from other grooves even when one groove is clogged with a gas reservoir such as spear.
- the four grooves 1a, 1b, 1c, and 1d formed in the pin 1 are terminated in the middle of the main body 15a. This is because not all of the outer periphery of the body portion 15a of the pin 1 is in sliding contact with the mold as shown in FIG. 1, but the outer periphery of the body portion is different from the core pin 4 shown in FIG. When all are in sliding contact with the mold, the ends of the plurality of grooves can be extended to a position reaching the collar, which is also included in the present invention.
- the four grooves 1 a, 1 b, 1 c, and 1 d are the shallowest grooves in the first embodiment. 20 and groove deep portions 21 having the deepest depth with respect to the outer peripheral surface are alternately and continuously formed. That is, the groove depth gradually decreases from the groove deep portion 21 to the groove shallow portion 20, and the groove depth gradually increases from the groove shallow portion 20 to the groove deep portion 21. Shaped to go. As a result, the gas flow drawn from the tip of the pin to the deep groove portion 21 can be throttled by the shallow groove portion 20, and by reducing the fluid flow, the Venturi effect can be achieved while increasing the flow velocity with a decrease in pressure.
- the groove deep portions 21 of the four grooves 1a, 1b, 1c, and 1d are formed so as not to overlap in the longitudinal direction.
- strength can be ensured reliably.
- the required strength means the strength required for the function of sliding and extruding a product when the mold is opened and closed.
- other pins, sleeves or nesting means the strength necessary for the function that they should fulfill.
- the arrows indicate the flow of gas, and an exaggerated gap is drawn between the pin and the mold for easy understanding, but is actually a minute gap that can slide.
- the shallow groove portion 20 having a shallow depth with respect to the outer peripheral surface and the deep groove portion 21 having a deep depth with respect to the outer peripheral surface are alternately and continuously formed.
- a position corresponding to the groove deep portion 21 is formed with a wide portion 21a having the widest width in the outer peripheral surface direction, and a position corresponding to the shallow groove portion 20 is provided with a width in the outer peripheral surface direction.
- the narrowest narrow portion 20a is formed. Therefore, in the pin 1 of the first embodiment, the narrow portions 20a and the wide portions 21a are alternately and continuously formed.
- the width in the outer circumferential direction gradually decreases from the wide portion 21a to the narrow portion 20a, and the width in the outer circumferential direction gradually increases from the narrow portion 20a to the wide portion 21a. Shaped to go. Thereby, the flow of gas drawn into the wide part 21a from the tip of the pin can be throttled by the narrow part 20a, and the Venturi effect that can increase the flow velocity while reducing the pressure by narrowing the flow of fluid. Using this, it is possible to prevent clogging of the grooves because it is difficult to collect gas.
- the vicinity of the wide end portion 22a may be formed so that the width in the outer peripheral surface direction gradually increases from the narrow portion 20a on the near side to the wide end portion 22a. Not.
- the shallow groove portion 20 and the deep groove portion 21 are dots, and the narrow portion 20a and the wide portion 21a corresponding thereto are shown by straight lines, but the shallow groove portion 20 (narrow portion 20a). And the groove deep part 21 (wide part 21a) does not become a pin angle, but is preferably positioned at the top of the rounded R surface. Further, the shallow groove portion 20 (narrow portion 20a) and the deep groove portion 21 (wide portion 21a) may have a width in the longitudinal direction of the groove.
- the venturi effect can be increased by forming the positions corresponding to the deep groove portions 21 and 22 into the wide portions 21a and 22a and the positions corresponding to the shallow groove portions 20 into the narrow portions 20a.
- the groove deep portions 21 and the shallow groove portions 20 are alternately continuous, and the groove width is constant, or the wide portions 21a and the narrow portions 20a are alternately continuous. Since the venturi effect can be obtained even when the length is constant, this is also included in the present invention.
- the wide grooves 21a (groove deep portions) of the four grooves 1a, 1b, 1c, and 1d are formed so as not to overlap in the longitudinal direction. Thereby, even if it is a small diameter pin etc., since the required pin thickness is ensured, the required intensity
- the present invention can be applied to a pin having a minimum diameter of 0.2 mm from the current processing technology.
- the minimum pin diameter is 0.2 mm
- the width of the narrow portion is 0.087178 mm
- the width of the wide portion is 0.173205 mm
- the depth of the shallow groove portion is 0.01 mm
- the depth of the deep portion is The depth is 0.05 mm.
- the groove width and depth can be measured with a three-dimensional measuring machine, and one example is a multi-sensor measuring machine (CALL ZEISS, O-INSPECT 543). .
- grooves 1e and 1f are formed on both the upper surface and the outer peripheral surface of the flange portion 15b.
- the gas that has reached the vicinity of the upper surface of the flange portion 15b by the grooves 1e and 1f passes through the groove 1e formed on the upper surface of the flange portion 15b and the groove 1f formed on the outer peripheral surface of the flange portion 15b. It can discharge
- the groove 1f has the shallowest depth with respect to the outer peripheral surface similar to the main body portion 15a and the deepest depth with respect to the outer peripheral surface.
- the pin 1 of the first embodiment has a circular cross section, but the present invention is not limited to this.
- the present invention can be applied even if the cross-section is a triangle, quadrangle, pentagon, hexagon or more polygonal shape, elliptical shape, star shape, heart-shaped pin, sleeve, or nesting.
- the resin molding die for injection molding is described, but the present invention is not limited to this.
- molds used in molding machines molding machines such as injection molding, compression molding, press-fitting molding, extrusion molding, etc.
- metal such as resin, rubber, aluminum, magnesium, etc.
- casting machines such as die casting
- the present invention can be applied even to a pin, a sleeve, or a nest installed in a mold to be used.
- FIG. 8 is a front view of the pin of the second embodiment
- FIG. 9 is a front view of the pin of FIG. 8 rotated by 45 degrees.
- the pin of 2nd Embodiment is demonstrated using these figures.
- adjacent grooves 30a and 30b communicate with each other at a predetermined location 32 in a plurality of grooves.
- the wide portion 31 (groove deep portion) is formed so as not to overlap in the longitudinal direction. Thereby, even if it is a small diameter pin etc., the required thickness of the pin is ensured. Since other configurations are the same as those of the pin 1 of the first embodiment, description thereof is omitted.
- the pin, sleeve or insert of the present invention is used by being inserted into a molding die.
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Abstract
[Problem] To provide a pin, a sleeve, or a bushing with which it is possible to perform degassing reliably even when the pin or the like has a small diameter, thus ensuring required strength. [Solution] A pin 1, a sleeve, or a bushing comprises a body portion and a flange portion disposed on a rear end of the body portion. A plurality of grooves 1a are formed in a longitudinal direction on an outer peripheral surface of the body portion. The grooves 1a include a narrow portion 20a having a small width in an outer peripheral surface direction, and a wide portion 21a having a large width in the outer peripheral surface direction which are alternately continuously formed.
Description
本発明は、成形金型に嵌挿されるピン、スリーブ又は入れ子であって、ガスベント用の溝が形成されているものに関するものである。
The present invention relates to a pin, a sleeve, or a nest that is inserted into a molding die and in which a groove for gas venting is formed.
従来から、成形金型のキャビティに成形材料を注入する際に、キャビティ内のガスを外部に排出するために、先端や外周面にガス抜き溝を形成したエジェクタピンや、複数のガスベントピースを組み合わせた円柱の内側に複数のガス逃げ溝構造を形成しているエジェクタピン等が知られている(非特許文献1、特許文献1~4)。
Conventionally, when injecting molding material into the mold cavity, the ejector pin with a gas vent groove on the tip and outer peripheral surface and multiple gas vent pieces are combined to discharge the gas in the cavity to the outside. In addition, an ejector pin or the like in which a plurality of gas escape groove structures are formed inside a cylinder is known (Non-Patent Document 1, Patent Documents 1 to 4).
しかしながら、上記非特許文献1や特許文献1又は2に記載のエジェクタピン等は、ガス噴出時の圧力が有効に伝わりにくく、ガス抜き効果が小さいという課題を有するものであった。
However, the ejector pins and the like described in Non-Patent Document 1 and Patent Document 1 or 2 have a problem that the pressure at the time of gas ejection is hardly transmitted effectively and the gas venting effect is small.
また、上記特許文献3又は4に記載のエジェクタピン等は、円柱の内側に形成された複数のガス逃げ溝の詰まりを確認し難く、詰まった際も専用の樹脂詰り除去装置が必要になると共に、小径のエジェクタピン等にガス逃げ溝を形成するのは困難であった。
In addition, the ejector pins and the like described in Patent Document 3 or 4 are difficult to check for clogging of a plurality of gas escape grooves formed inside the cylinder, and even when clogged, a dedicated resin clogging removal device is required. It is difficult to form a gas escape groove in a small diameter ejector pin or the like.
本発明は、上述した問題点を解決するためになされたものであり、小径のピン等であっても確実にガス抜きを行うことが可能であると共に、必要とされる強度を確保することができるピン、スリーブ又は入れ子を提供することを目的とする。
The present invention has been made to solve the above-described problems, and even with a small-diameter pin or the like, it is possible to surely vent the gas and ensure the required strength. The object is to provide a pin, sleeve or nest that can be made.
請求項1の発明は、溶融材料が充填されるキャビティを形成する成形金型に嵌挿されるピン、スリーブ又は入れ子であって、前記ピン、スリーブ又は入れ子は、本体部のみ、又は前記本体部と該本体部の後端に設けられた鍔部と、を有すると共に、前記本体部の外周面の長手方向に複数条の溝が形成されており、前記溝は、前記外周面に対する深さが浅い溝浅部と、前記外周面に対する深さが深い溝深部が交互に連続して形成されていることを特徴としている。
The invention of claim 1 is a pin, a sleeve, or a nest inserted in a molding die that forms a cavity filled with a molten material, and the pin, the sleeve, or the nest is only the main body or the main body And a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body, and the grooves have a shallow depth with respect to the outer peripheral surface. A shallow groove portion and a deep groove portion having a deep depth with respect to the outer peripheral surface are alternately and continuously formed.
請求項1のピン、スリーブ又は入れ子は、本体部の外周面の長手方向に複数条の溝が形成されていることから、1条の溝がヤニ等のガス溜まりにより詰まった場合でも他の溝から確実にガス抜きを行うことが可能である。また、溝浅部と溝深部が交互に連続して形成されていることから、小径のピン等であっても必要とされる強度を確保することができると共に、流体の流れを絞ることによって、圧力の低下を伴いながら流速を増加させることができるベンチュリー効果によってガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。尚、複数条の溝が形成されている外周面の長手方向とは、キャビティに隣接又は近接する先端部分からキャビティに対して遠ざかる方向を意味している。
The pin, sleeve or nest of claim 1 has a plurality of grooves formed in the longitudinal direction of the outer peripheral surface of the main body, so that even if one groove is clogged with a gas pool such as spear, other grooves It is possible to vent the gas reliably from In addition, since the shallow groove portion and the deep groove portion are alternately and continuously formed, the required strength can be ensured even with a small-diameter pin and the like, and by narrowing the flow of fluid, It is possible to prevent clogging of the groove because it becomes difficult to collect gas due to the venturi effect that can increase the flow velocity with a decrease in pressure. In addition, the longitudinal direction of the outer peripheral surface in which a plurality of grooves are formed means a direction away from the cavity from a tip portion adjacent to or close to the cavity.
請求項2の発明は、溶融材料が充填されるキャビティを形成する成形金型に嵌挿されるピン、スリーブ又は入れ子であって、前記ピン、スリーブ又は入れ子は、本体部のみ、又は前記本体部と該本体部の後端に設けられた鍔部と、を有すると共に、前記本体部の外周面の長手方向に複数条の溝が形成されており、前記溝は、前記外周面方向の幅が狭い幅狭部と、前記外周面方向の幅が広い幅広部が交互に連続して形成されていることを特徴としている。
The invention of claim 2 is a pin, a sleeve or a nest inserted in a molding die forming a cavity filled with a molten material, and the pin, the sleeve or the nest is only a main body part or the main body part. And a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body portion, and the groove has a narrow width in the outer peripheral surface direction. The narrow portions and the wide portions having a wide width in the outer peripheral surface direction are alternately and continuously formed.
請求項2のピン、スリーブ又は入れ子は、本体部の外周面の長手方向に複数条の溝が形成されていることから、1条の溝がヤニ等のガス溜まりにより詰まった場合でも他の溝から確実にガス抜きを行うことが可能である。また、幅狭部と幅広部が交互に連続して形成されていることから、小径のピン等であっても必要とされる強度を確保することができると共に、流体の流れを絞ることによって、圧力の低下を伴いながら流速を増加させることができるベンチュリー効果によってガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。尚、複数条の溝が形成されている外周面の長手方向とは、キャビティに隣接又は近接する先端部分からキャビティに対して遠ざかる方向を意味している。
The pin, sleeve or nest of claim 2 has a plurality of grooves formed in the longitudinal direction of the outer peripheral surface of the main body portion, so that even if one groove is clogged with a gas pool such as spear, other grooves It is possible to vent the gas reliably from In addition, since the narrow portion and the wide portion are formed alternately and continuously, the required strength can be ensured even with a small-diameter pin and the like, and by narrowing the fluid flow, It is possible to prevent clogging of the groove because it becomes difficult to collect gas due to the venturi effect that can increase the flow velocity with a decrease in pressure. In addition, the longitudinal direction of the outer peripheral surface in which a plurality of grooves are formed means a direction away from the cavity from a tip portion adjacent to or close to the cavity.
請求項3の発明は、請求項1又は2のピン、スリーブ又は入れ子において、溝は、曲面にて形成されていることを特徴としている。したがって、曲面にて形成された溝が、溝浅部と溝深部又は、幅狭部と幅広部が交互に繰り返すように形成されていることから、曲面にて形成されていない溝と比較した場合に、流体の抵抗が軽減されベンチュリー効果を高めることができ、ガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。
The invention of claim 3 is characterized in that, in the pin, sleeve or nest of claim 1 or 2, the groove is formed by a curved surface. Therefore, when the groove formed on the curved surface is formed so that the groove shallow portion and the groove deep portion or the narrow portion and the wide portion are alternately repeated, compared with the groove not formed on the curved surface. In addition, the resistance of the fluid is reduced, the venturi effect can be enhanced, and the gas can hardly be retained, so that the clogging of the groove can be prevented.
請求項4の発明は、請求項1~3のいずれかのピン、スリーブ又は入れ子において、複数条の溝は、全ての溝深部又は幅広部の位置が長手方向において重ならないように形成されていることを特徴としている。したがって、小径のピン等であっても必要とされるピンの太さが確保されることから、必要とされる強度を確実に確保することができる。
According to a fourth aspect of the present invention, in the pin, sleeve or nest according to any one of the first to third aspects, the plurality of grooves are formed so that all the groove deep portions or the wide portions do not overlap in the longitudinal direction. It is characterized by that. Therefore, even if it is a small diameter pin etc., since the required pin thickness is ensured, the required intensity | strength can be ensured reliably.
請求項5の発明は、請求項1~4のいずれかのピン、スリーブ又は入れ子において、複数条の溝は、隣り合う溝が所定箇所にて連通していることを特徴としている。したがって、溝の詰り箇所が複数発生した場合であってもガスの逃げ道を確保することができるので、一層確実にガス抜きを行うことが可能である。
The invention of claim 5 is characterized in that, in the pin, sleeve or nest of any one of claims 1 to 4, the plurality of grooves have adjacent grooves communicating with each other at a predetermined location. Therefore, even when a plurality of clogged portions of the groove are generated, a gas escape path can be ensured, so that the gas can be vented more reliably.
請求項6の発明は、請求項1~5のいずれかのピン、スリーブ又は入れ子において、鍔部には、溝が形成されていることを特徴としている。したがって、鍔部に形成された溝からもガス抜きを行うことが可能である。
The invention of claim 6 is characterized in that in the pin, sleeve or nest of any one of claims 1 to 5, a groove is formed in the collar portion. Therefore, it is possible to vent the gas from the groove formed in the collar portion.
請求項7の発明は、請求項6のピン、スリーブ又は入れ子において、鍔部に形成された溝は、複数条の溝であって、鍔部の上面と外周面の両方に形成されていることを特徴としている。したがって、鍔部の上面付近に到達したガスを、鍔部の上面に形成されている溝と鍔部の外周面に形成されている溝を経由させて鍔部の後方へと排出すことができる。
According to a seventh aspect of the present invention, in the pin, sleeve or nest of the sixth aspect, the groove formed in the collar portion is a plurality of grooves, and is formed on both the upper surface and the outer peripheral surface of the collar portion. It is characterized by. Therefore, the gas that has reached the vicinity of the upper surface of the collar can be discharged to the rear of the collar via the groove formed on the upper surface of the collar and the groove formed on the outer peripheral surface of the collar. .
請求項1又は2の発明は、1条の溝がヤニ等のガス溜まりにより詰まった場合でも他の溝から確実にガス抜きを行うことが可能であると共に、小径のピン等であっても必要とされる強度を確保することができる。また、ベンチュリー効果によってガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。また、請求項3の発明は、ベンチュリー効果を高めることによって溝が詰まるのを一層防ぐことができる。また、請求項4の発明は、小径のピン等であっても必要とされるピンの太さが確保されることから、必要とされる強度を確実に確保することができる。
In the invention of claim 1 or 2, even if one groove is clogged with a gas reservoir such as spear, it is possible to surely vent the gas from other grooves, and even a small-diameter pin or the like is necessary. It is possible to ensure the strength. Moreover, since it becomes difficult to make a gas reservoir due to the venturi effect, it is possible to prevent clogging of the groove. Further, the invention of claim 3 can further prevent clogging of the groove by enhancing the venturi effect. In the invention of claim 4, even if it is a small-diameter pin or the like, the required pin thickness is ensured, so that the required strength can be reliably ensured.
請求項5の発明は、溝の詰り箇所が複数発生した場合であってもガスの逃げ道を確保することができるので、一層確実にガス抜きを行うことが可能である。また、請求項6の発明は、鍔部に形成された溝からもガス抜きを行うことが可能である。また、請求項7の発明は、鍔部の上面付近に到達したガスを、鍔部の上面に形成されている溝と鍔部の外周面に形成されている溝を経由させて鍔部の後方へと排出すことができる。
The invention of claim 5 can secure a gas escape path even when a plurality of clogged portions of the groove are generated, so that the gas can be vented more reliably. Moreover, the invention of claim 6 can also perform gas venting from the groove formed in the collar portion. Further, the invention according to claim 7 is that the gas that has reached the vicinity of the upper surface of the buttock is passed through the groove formed on the upper surface of the buttock and the groove formed on the outer peripheral surface of the buttock, Can be discharged.
以下、本発明の実施形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
図1は、本発明に係るピン、スリーブ又は入れ子が嵌挿された射出成型用の樹脂成形金型の断面図である。この図を用いて本発明に係るピン、スリーブ又は入れ子と金型の関係について説明する。金型は、固定型13に対して可動型14が動いて開閉する仕組みとなっており、成形材料である溶融された樹脂の充填時には、金型は閉じられ、成形された製品の取り出し時には金型は開かれる。
FIG. 1 is a cross-sectional view of a resin molding die for injection molding in which pins, sleeves or inserts according to the present invention are inserted. The relationship between the pin, sleeve or insert and mold according to the present invention will be described with reference to this figure. The mold has a mechanism in which the movable mold 14 moves with respect to the fixed mold 13 to be opened and closed. When the molten resin as a molding material is filled, the mold is closed, and when the molded product is taken out, the mold is closed. The mold is opened.
金型の開閉時には、エジェクタピン1と、製品ピン3と、スプルーロックピン6は摺動自在となるように、可動型14に形成されている各ピン孔に挿通されている。一方、エジェクタスリーブ2と、コアピン4と、入れ子5(コアと呼ぶ場合もある。)は、摺動自在ではなく、各ピン孔に固定されている。そして、溶融された樹脂は、樹脂注入口10からスプルー11を経由して製品部9(キャビティと呼ぶ場合もある。)に充填されて射出成型が行われる。
When the mold is opened and closed, the ejector pin 1, the product pin 3, and the sprue lock pin 6 are inserted into the respective pin holes formed in the movable mold 14 so as to be slidable. On the other hand, the ejector sleeve 2, the core pin 4, and the insert 5 (sometimes referred to as a core) are not slidable and are fixed to the respective pin holes. The melted resin is filled from the resin injection port 10 through the sprue 11 into the product portion 9 (sometimes referred to as a cavity) and injection molding is performed.
ここで、本発明に係るピンとは、エジェクタピン1、製品ピン3、スプルーロックピン6、コアピン4の他に、図1には示されていないが、射抜きピン、バルブゲートピン等、金型の製品部9やスプルー11を含む溶融された成形材料が通過する軌道に隣接しつつ、金型に嵌挿されている全てのピンが該当する。
Here, the pins according to the present invention are not shown in FIG. 1 in addition to the ejector pin 1, the product pin 3, the sprue lock pin 6, and the core pin 4, but are a punch pin, a valve gate pin, etc. This corresponds to all the pins fitted in the mold while adjacent to the track through which the molten molding material including the product portion 9 and the sprue 11 passes.
また、本発明に係るスリーブとは、図1に示したエジェクタスリーブ2の他に、金型の製品部9やスプルー11を含む溶融された成形材料が通過する軌道に隣接しつつ、金型に嵌挿されている全てのスリーブが該当する。尚、図1においてピンと金型との間にわかり易いように誇張した隙間が描かれているが実際には摺動できる程度の微小な隙間である。
In addition to the ejector sleeve 2 shown in FIG. 1, the sleeve according to the present invention is adjacent to the track through which the molten molding material including the product part 9 and the sprue 11 of the mold passes, All sleeves inserted are applicable. In FIG. 1, an exaggerated gap is drawn between the pin and the mold for easy understanding, but it is actually a minute gap that can slide.
同様にして、本発明に係る入れ子とは、図1に示した入れ子5の他に、金型の製品部9やスプルー11を含む溶融された成形材料が通過する軌道に隣接しつつ、金型に嵌挿されている全ての入れ子が該当する。
Similarly, the insert according to the present invention is adjacent to the track through which the molten molding material including the product portion 9 and the sprue 11 of the mold passes in addition to the insert 5 shown in FIG. All nestings inserted in are applicable.
図2は、本発明に係る第1実施形態のピンの斜視図である。また、図3は、本発明に係る第1実施形態のピンが金型に嵌挿された状態の断面図である。また、図4(a)~(d)は、本発明に係る第1実施形態のピンの断面図である。また、図5(a)は、第1実施形態のピンの拡大正面図であり、図5(b)は、図5(a)のA-A断面図である。また、図6は、第1実施形態のピンの正面図であり、図7は、図6のピンを45度回転させた状態の正面図である。これらの図を用いて第1実施形態のピンの詳細について説明する。
FIG. 2 is a perspective view of the pin according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state in which the pin according to the first embodiment of the present invention is inserted into a mold. 4A to 4D are cross-sectional views of the pin according to the first embodiment of the present invention. FIG. 5A is an enlarged front view of the pin of the first embodiment, and FIG. 5B is a cross-sectional view taken along the line AA in FIG. FIG. 6 is a front view of the pin of the first embodiment, and FIG. 7 is a front view of the pin of FIG. 6 rotated by 45 degrees. Details of the pins of the first embodiment will be described with reference to these drawings.
第1実施形態のピン(エジェクタピン)1は、円筒状の本体部15aと、本体部15aの後端に設けられた鍔部15bとを有している。本体部15aの外周の長手方向には、4条の溝1a、1b、1c、1dが、外周を4等分する位置に形成されている。尚、本発明のピン、スリーブ又は入れ子に形成される溝の数は2条以上の複数条であればよく、第1実施形態のピン1に示すように4条の溝に限定するものではない。複数条の溝を形成することによって、1条の溝がヤニ等のガス溜まりにより詰まった場合でも他の溝から確実にガス抜きを行うことができる。尚、ピン1に形成された4条の溝1a、1b、1c、1dは、本体部15aの中途部に終端が位置している。これは図1に示すように、ピン1の本体部15aの外周の全てが金型に摺接しているわけではないからであるが、図1に示すコアピン4のように、本体部の外周の全てが金型に摺接している場合には、複数条の溝の終端を鍔部に到達する位置まで延長することもでき、これも本発明に含まれる。
The pin (ejector pin) 1 of the first embodiment has a cylindrical main body 15a and a flange 15b provided at the rear end of the main body 15a. In the longitudinal direction of the outer periphery of the main body 15a, four grooves 1a, 1b, 1c, and 1d are formed at positions that divide the outer periphery into four equal parts. The number of grooves formed in the pin, sleeve, or nest of the present invention may be two or more, and is not limited to four grooves as shown in the pin 1 of the first embodiment. . By forming a plurality of grooves, gas can be surely vented from other grooves even when one groove is clogged with a gas reservoir such as spear. The four grooves 1a, 1b, 1c, and 1d formed in the pin 1 are terminated in the middle of the main body 15a. This is because not all of the outer periphery of the body portion 15a of the pin 1 is in sliding contact with the mold as shown in FIG. 1, but the outer periphery of the body portion is different from the core pin 4 shown in FIG. When all are in sliding contact with the mold, the ends of the plurality of grooves can be extended to a position reaching the collar, which is also included in the present invention.
第1実施形態のピンは図4の断面図及び図5のピンの拡大正面図に示すように、4条の溝1a、1b、1c、1dは、外周面に対する深さが最も浅い溝浅部20と、外周面に対する深さが最も深い溝深部21が交互に連続して形成されている。即ち、溝深部21から溝浅部20に至るまでの間は溝の深さが漸次減少して行き、溝浅部20から溝深部21に至るまでの間は溝の深さが漸次増加して行くように形成されている。これにより、ピン先から溝深部21に引き込まれたガスの流れを溝浅部20で絞ることができ、流体の流れを絞ることによって、圧力の低下を伴いながら流速を増加させることができるベンチュリー効果を利用して、ガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。尚、終端溝深部22の近傍については、手前の溝浅部20から終端溝深部22に至るまでの間は溝の深さが漸次増加して行くように形成してもよいがこれに限定されない。何故ならば、終端溝深部22の近傍においてピン1は本体部の金型と摺接していないので、前述したベンチュリー効果が期待できないからである。
As shown in the cross-sectional view of FIG. 4 and the enlarged front view of the pin of FIG. 5, the four grooves 1 a, 1 b, 1 c, and 1 d are the shallowest grooves in the first embodiment. 20 and groove deep portions 21 having the deepest depth with respect to the outer peripheral surface are alternately and continuously formed. That is, the groove depth gradually decreases from the groove deep portion 21 to the groove shallow portion 20, and the groove depth gradually increases from the groove shallow portion 20 to the groove deep portion 21. Shaped to go. As a result, the gas flow drawn from the tip of the pin to the deep groove portion 21 can be throttled by the shallow groove portion 20, and by reducing the fluid flow, the Venturi effect can be achieved while increasing the flow velocity with a decrease in pressure. Using this, it is possible to prevent clogging of the grooves because it is difficult to collect gas. In addition, about the vicinity of the termination groove deep part 22, you may form so that the depth of a groove | channel may increase gradually from the near groove shallow part 20 to the termination groove deep part 22, but it is not limited to this. . This is because the pin 1 is not in sliding contact with the die of the main body portion in the vicinity of the end groove deep portion 22, and thus the above-described Venturi effect cannot be expected.
また、4条の溝1a、1b、1c、1dの溝深部21の位置が長手方向において重ならないように形成されている。これにより、小径のピン等であっても必要とされるピンの太さが確保されることから、必要とされる強度を確実に確保することができる。ここで、必要とされる強度とは、エジェクタピンの場合には、金型の開閉時に摺動して製品を押し出す機能に必要な強度を意味している。また、その他のピン、スリーブ又は入れ子についても、それらが本来果たすべき機能に必要な強度を意味している。尚、図3において矢印はガスの流れを示しており、ピンと金型との間にわかり易いように誇張した隙間が描かれているが実際には摺動できる程度の微小な隙間である。
Further, the groove deep portions 21 of the four grooves 1a, 1b, 1c, and 1d are formed so as not to overlap in the longitudinal direction. Thereby, even if it is a small diameter pin etc., since the required pin thickness is ensured, the required intensity | strength can be ensured reliably. Here, in the case of an ejector pin, the required strength means the strength required for the function of sliding and extruding a product when the mold is opened and closed. In addition, other pins, sleeves or nesting means the strength necessary for the function that they should fulfill. In FIG. 3, the arrows indicate the flow of gas, and an exaggerated gap is drawn between the pin and the mold for easy understanding, but is actually a minute gap that can slide.
第1実施形態のピン1は、前述したとおり、外周面に対する深さが浅い溝浅部20と、外周面に対する深さが深い溝深部21が交互に連続して形成されているが、図5(a)に示すように、溝深部21に対応する位置は、外周面方向の幅が最も広い幅広部21aが形成されており、溝浅部20に対応する位置は、外周面方向の幅が最も狭い幅狭部20aが形成されている。したがって、第1実施形態のピン1は、幅狭部20aと幅広部21aが交互に連続して形成されている。即ち、幅広部21aから幅狭部20aに至るまでの間は外周面方向の幅が漸次減少して行き、幅狭部20aから幅広部21aに至るまでの間は外周面方向の幅が漸次増加して行くように形成されている。これにより、ピン先から幅広部21aに引き込まれたガスの流れを幅狭部20aで絞ることができ、流体の流れを絞ることによって、圧力の低下を伴いながら流速を増加させることができるベンチュリー効果を利用して、ガス溜まりが出来難くなることから溝が詰まるのを防ぐことができる。尚、終端幅広部22aの近傍については、手前の幅狭部20aから終端幅広部22aに至るまでの間は外周面方向の幅が漸次増加して行くように形成してもよいがこれに限定されない。何故ならば、終端幅広部22aの近傍においてピン1は本体部の金型と摺接していないので、前述したベンチュリー効果が期待できないからである。ここで、図5において、溝浅部20及び溝深部21は点で、これに対応する幅狭部20a及び幅広部21aは直線で図示しているが、溝浅部20(幅狭部20a)及び溝深部21(幅広部21a)はピン角とはならず、丸みを有するR面の頂部に位置させるのが好ましい。また、溝浅部20(幅狭部20a)及び溝深部21(幅広部21a)を溝の長手方向に幅を持たせるようにしてもよい。
As described above, in the pin 1 of the first embodiment, the shallow groove portion 20 having a shallow depth with respect to the outer peripheral surface and the deep groove portion 21 having a deep depth with respect to the outer peripheral surface are alternately and continuously formed. As shown in (a), a position corresponding to the groove deep portion 21 is formed with a wide portion 21a having the widest width in the outer peripheral surface direction, and a position corresponding to the shallow groove portion 20 is provided with a width in the outer peripheral surface direction. The narrowest narrow portion 20a is formed. Therefore, in the pin 1 of the first embodiment, the narrow portions 20a and the wide portions 21a are alternately and continuously formed. That is, the width in the outer circumferential direction gradually decreases from the wide portion 21a to the narrow portion 20a, and the width in the outer circumferential direction gradually increases from the narrow portion 20a to the wide portion 21a. Shaped to go. Thereby, the flow of gas drawn into the wide part 21a from the tip of the pin can be throttled by the narrow part 20a, and the Venturi effect that can increase the flow velocity while reducing the pressure by narrowing the flow of fluid. Using this, it is possible to prevent clogging of the grooves because it is difficult to collect gas. The vicinity of the wide end portion 22a may be formed so that the width in the outer peripheral surface direction gradually increases from the narrow portion 20a on the near side to the wide end portion 22a. Not. This is because the pin 1 is not in sliding contact with the die of the main body in the vicinity of the wide end portion 22a, so that the above-described Venturi effect cannot be expected. Here, in FIG. 5, the shallow groove portion 20 and the deep groove portion 21 are dots, and the narrow portion 20a and the wide portion 21a corresponding thereto are shown by straight lines, but the shallow groove portion 20 (narrow portion 20a). And the groove deep part 21 (wide part 21a) does not become a pin angle, but is preferably positioned at the top of the rounded R surface. Further, the shallow groove portion 20 (narrow portion 20a) and the deep groove portion 21 (wide portion 21a) may have a width in the longitudinal direction of the groove.
また、4条の溝1a、1b、1c、1dは曲面にて形成されていることから、曲面にて形成されていない溝と比較した場合に、流体の抵抗が軽減されベンチュリー効果を高めることができる。さらに、溝深部21、22に対応する位置が幅広部21a、22aとなり、溝浅部20に対応する位置が幅狭部20aとなる形状とすることによって、ベンチュリー効果を増大させることができる。尚、溝深部21と溝浅部20が交互に連続する形態であって、溝の幅が一定の場合や、幅広部21aと幅狭部20aが交互に連続する形態であって、溝の深さが一定の場合であってもベンチュリー効果を奏することができるので、これも本発明に含まれる。
Further, since the four grooves 1a, 1b, 1c, and 1d are formed with curved surfaces, the resistance of the fluid is reduced and the venturi effect is enhanced when compared with grooves that are not formed with curved surfaces. it can. Further, the venturi effect can be increased by forming the positions corresponding to the deep groove portions 21 and 22 into the wide portions 21a and 22a and the positions corresponding to the shallow groove portions 20 into the narrow portions 20a. The groove deep portions 21 and the shallow groove portions 20 are alternately continuous, and the groove width is constant, or the wide portions 21a and the narrow portions 20a are alternately continuous. Since the venturi effect can be obtained even when the length is constant, this is also included in the present invention.
また、図7に示すように、4条の溝1a、1b、1c、1dの幅広部21a(溝深部)の位置が長手方向において重ならないように形成されている。これにより、小径のピン等であっても必要とされるピンの太さが確保されることから、必要とされる強度を確実に確保することができる。ここで、本発明は、現在の加工技術より、最小直径0.2mmまでのピンに適用することができる。ピンの最小直径を0.2mmとした場合には、幅狭部の幅は、0.087178mm、幅広部の幅は、0.173205mm、溝浅部の深さは、0.01mm、溝深部の深さは、0.05mmとなる。尚、溝の幅や深さの計測は、3次元測定機を使用すれば精密な測定が可能であり、その一例として、マルチセンサ測定機(CARL ZEISS製 O-INSPECT 543)を挙げることができる。
Further, as shown in FIG. 7, the wide grooves 21a (groove deep portions) of the four grooves 1a, 1b, 1c, and 1d are formed so as not to overlap in the longitudinal direction. Thereby, even if it is a small diameter pin etc., since the required pin thickness is ensured, the required intensity | strength can be ensured reliably. Here, the present invention can be applied to a pin having a minimum diameter of 0.2 mm from the current processing technology. When the minimum pin diameter is 0.2 mm, the width of the narrow portion is 0.087178 mm, the width of the wide portion is 0.173205 mm, the depth of the shallow groove portion is 0.01 mm, and the depth of the deep portion is The depth is 0.05 mm. The groove width and depth can be measured with a three-dimensional measuring machine, and one example is a multi-sensor measuring machine (CALL ZEISS, O-INSPECT 543). .
第1実施形態のピン1の鍔部15bは、鍔部15bの上面と外周面の両方に溝1e、1fが形成されている。この溝1e、1fによって、鍔部15bの上面付近に到達したガスを、鍔部15bの上面に形成されている溝1eと鍔部15bの外周面に形成されている溝1fを経由させて鍔部15bの後方へと排出すことができる。尚、鍔部15bの外周面が金型と摺接している場合には、溝1fに本体部15aと同様の外周面に対する深さが最も浅い溝浅部と、外周面に対する深さが最も深い溝深部が交互に連続して形成されている構成、又は外周面方向の幅が最も狭い幅狭部と外周面方向の幅が最も広い幅広部が交互に連続して形成されている構成を付加することができる。これにより、圧力の低下を伴いながら流速を増加させることができるベンチュリー効果を利用して、ガス溜まりが出来難くなることから溝1fが詰まるのを防ぐことができる。
In the flange portion 15b of the pin 1 of the first embodiment, grooves 1e and 1f are formed on both the upper surface and the outer peripheral surface of the flange portion 15b. The gas that has reached the vicinity of the upper surface of the flange portion 15b by the grooves 1e and 1f passes through the groove 1e formed on the upper surface of the flange portion 15b and the groove 1f formed on the outer peripheral surface of the flange portion 15b. It can discharge | emit to the back of the part 15b. When the outer peripheral surface of the flange portion 15b is in sliding contact with the mold, the groove 1f has the shallowest depth with respect to the outer peripheral surface similar to the main body portion 15a and the deepest depth with respect to the outer peripheral surface. Added a configuration in which the deep part of the groove is formed alternately and continuously, or a narrow part with the narrowest width in the outer peripheral surface direction and a wide part with the widest width in the outer peripheral surface direction are alternately formed. can do. This makes it possible to prevent clogging of the groove 1f because it becomes difficult to make a gas reservoir by using the venturi effect that can increase the flow velocity while the pressure is lowered.
尚、第1実施形態のピン1は断面が円形状であるが、本発明はこれに限定するものではない。例えば、断面が三角形、四角形、五角形、六角形以上の多角形や、楕円形、星型、ハート型等異形のピン、スリーブ又は入れ子であっても本発明を適用することができる。
The pin 1 of the first embodiment has a circular cross section, but the present invention is not limited to this. For example, the present invention can be applied even if the cross-section is a triangle, quadrangle, pentagon, hexagon or more polygonal shape, elliptical shape, star shape, heart-shaped pin, sleeve, or nesting.
また、第1実施形態では射出成型用の樹脂成形金型で説明しているが、本発明はこれに限定するものではない。例えば、樹脂、ゴムや、アルミニウム、マグネシウム等の金属を充填し製造する成形機(射出成形、圧縮成形、圧入成形、押出成形等の成形機)に使用する金型や、ダイカスト等の鋳造機に使用する金型に設置するピン、スリーブ又は入れ子であっても本発明を適用することができる。
In the first embodiment, the resin molding die for injection molding is described, but the present invention is not limited to this. For example, in molds used in molding machines (molding machines such as injection molding, compression molding, press-fitting molding, extrusion molding, etc.) that are filled with metal such as resin, rubber, aluminum, magnesium, etc., and casting machines such as die casting The present invention can be applied even to a pin, a sleeve, or a nest installed in a mold to be used.
図8は、第2実施形態のピンの正面図であり、図9は、図8のピンを45度回転させた状態の正面図である。これらの図を用いて第2実施形態のピンについて説明する。
FIG. 8 is a front view of the pin of the second embodiment, and FIG. 9 is a front view of the pin of FIG. 8 rotated by 45 degrees. The pin of 2nd Embodiment is demonstrated using these figures.
第2実施形態のピン30は、複数条の溝は、隣り合う溝30a、30bが所定箇所32にて連通している。これにより、溝の詰り箇所が複数発生した場合であってもガスの逃げ道を確保することができるので、一層確実にガス抜きを行うことができる。尚、幅広部31(溝深部)の位置が長手方向において重ならないように形成されている。これにより、小径のピン等であっても必要とされるピンの太さが確保される。その他の構成は第1実施形態のピン1と同様の構成であるから説明は省略する。
In the pin 30 of the second embodiment, adjacent grooves 30a and 30b communicate with each other at a predetermined location 32 in a plurality of grooves. As a result, even if a plurality of clogged portions of the groove are generated, a gas escape path can be secured, so that the gas can be vented more reliably. The wide portion 31 (groove deep portion) is formed so as not to overlap in the longitudinal direction. Thereby, even if it is a small diameter pin etc., the required thickness of the pin is ensured. Since other configurations are the same as those of the pin 1 of the first embodiment, description thereof is omitted.
本発明のピン、スリーブ又は入れ子は、成形金型に嵌挿されて使用される。
The pin, sleeve or insert of the present invention is used by being inserted into a molding die.
1、30 ピン
1a、1b、1c、1d、1e、1f、30a、30b 溝
15a 本体部
15b 鍔部
20 溝浅部
20a 幅狭部
21 溝深部
21a、31 幅広部
22 終端溝深部
22a 終端幅広部
32 所定箇所
1, 30 pins 1a, 1b, 1c, 1d, 1e, 1f, 30a, 30b groove 15a main body 15b flange 20 groove shallow part 20a narrow part 21 groove deep part 21a, 31 wide part 22 termination groove deep part 22a terminal wide part 32 Predetermined locations
1a、1b、1c、1d、1e、1f、30a、30b 溝
15a 本体部
15b 鍔部
20 溝浅部
20a 幅狭部
21 溝深部
21a、31 幅広部
22 終端溝深部
22a 終端幅広部
32 所定箇所
1, 30
Claims (7)
- 溶融材料が充填されるキャビティを形成する成形金型に嵌挿されるピン、スリーブ又は入れ子であって、
前記ピン、スリーブ又は入れ子は、本体部のみ、又は前記本体部と該本体部の後端に設けられた鍔部と、を有すると共に、前記本体部の外周面の長手方向に複数条の溝が形成されており、
前記溝は、前記外周面に対する深さが浅い溝浅部と、前記外周面に対する深さが深い溝深部が交互に連続して形成されていることを特徴とするピン、スリーブ又は入れ子。 A pin, sleeve or nest inserted into a mold that forms a cavity filled with molten material,
The pin, sleeve, or nest has a main body part only, or the main body part and a flange provided at the rear end of the main body part, and a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body part. Formed,
The groove, the groove shallow portion having a shallow depth with respect to the outer peripheral surface and the groove deep portion having a deep depth with respect to the outer peripheral surface are alternately and continuously formed. - 溶融材料が充填されるキャビティを形成する成形金型に嵌挿されるピン、スリーブ又は入れ子であって、
前記ピン、スリーブ又は入れ子は、本体部のみ、又は前記本体部と該本体部の後端に設けられた鍔部と、を有すると共に、前記本体部の外周面の長手方向に複数条の溝が形成されており、
前記溝は、前記外周面方向の幅が狭い幅狭部と、前記外周面方向の幅が広い幅広部が交互に連続して形成されていることを特徴とするピン、スリーブ又は入れ子。 A pin, sleeve or nest inserted into a mold that forms a cavity filled with molten material,
The pin, sleeve, or nest has a main body part only, or the main body part and a flange provided at the rear end of the main body part, and a plurality of grooves are formed in the longitudinal direction of the outer peripheral surface of the main body part. Formed,
The groove, the pin, the sleeve, or the nesting is characterized in that a narrow portion having a narrow width in the outer peripheral surface direction and a wide portion having a wide width in the outer peripheral surface direction are alternately formed. - 溝は、曲面にて形成されていることを特徴とする請求項1又は2に記載のピン、スリーブ又は入れ子。 3. The pin, sleeve or nest according to claim 1 or 2, wherein the groove is formed by a curved surface.
- 複数条の溝は、全ての溝深部又は幅広部の位置が長手方向において重ならないように形成されていることを特徴とする請求項1~3のいずれか1項に記載のピン、スリーブ又は入れ子。 The pin, sleeve, or nest according to any one of claims 1 to 3, wherein the plurality of grooves are formed so that all the groove deep portions or wide portions do not overlap in the longitudinal direction. .
- 複数条の溝は、隣り合う溝が所定箇所にて連通していることを特徴とする請求項1~4のいずれか1項に記載のピン、スリーブ又は入れ子。 5. The pin, sleeve or nest according to any one of claims 1 to 4, wherein the plurality of grooves are such that adjacent grooves communicate with each other at a predetermined location.
- 鍔部には、溝が形成されていることを特徴とする請求項1~5のいずれか1項に記載のピン、スリーブ又は入れ子。 The pin, sleeve or nest according to any one of claims 1 to 5, wherein a groove is formed in the collar portion.
- 鍔部に形成された溝は、複数条の溝であって、鍔部の上面と外周面の両方に形成されていることを特徴とする請求項6に記載のピン、スリーブ又は入れ子。
7. The pin, sleeve or nest according to claim 6, wherein the groove formed in the collar part is a plurality of grooves, and is formed on both the upper surface and the outer peripheral surface of the collar part.
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