TWI410319B - Runner and its manufacturing method - Google Patents

Abstract

A sprue bush (10), incorporating in its body a sprue (12) having an injection port (11) formed, at one end hereof, to be coupled with the injection port of an injection molding machine and a discharge port (13) formed, at the other end hereof, to be coupled with the cavity of a die when it is fixed to the die, comprises a cylindrical sprue bush body (61) having body water channels (14a, 14b, 14c) buried in a part of the region excepting the sprue (12), and a flange portion (60) expanding from the injection port (11) side of the sprue bush body (61) to be connected with the sprue bush body (61) and having flange portion water channels (15a, 15b) buried therein that are continuous from the body water channels (14a, 14b, 14c) and communicate with the outside. With such a sprue bush (10), molten material filling the sprue (12) is cooled efficiently, and deterioration in quality of a molding can be suppressed.

Description

Sprue and its manufacturing method

The present invention relates to a runner and a method of manufacturing the same.

Previously, a material for injection molding of a shaped product was known by ejecting a material to be heated and melted (hereinafter referred to as a molten material) into a mold.

Specifically, the mold used for injection molding has a runner that is pressed against the exit port of the injection molding machine that emits the molten material, and a shape portion for forming a molded article. The mold has a runner having a gate as a molten material injection space, a cavity as a molten material filling space, and a flow path as a molten material flow path. The gate and the cavity are connected through the flow path.

In such an injection molding die, after the molten material filled in the cavity is sufficiently cooled and solidified, the molded article is taken out from the cavity. At this time, in order to prevent the material from remaining in the gate and the flow path, the molten material filled in the gate and the flow path is sufficiently cooled and solidified before being taken out.

Generally, the volume per unit area is larger than the cavity or runner. However, the time required to cure the molten material filled in the gate or runner is longer than the time required to cure the molten material filled in the cavity. Therefore, if the time required for the molten material filled in the gate or the flow path to be cured is shortened, the production efficiency can be improved.

On the other hand, an injection molding die which is formed by forming a cooling water flow path in a member forming a flow path or the like to shorten the time required for the molten material to be filled in the flow path until curing is proposed (for example, Patent Document 1).

Here, when the member or the runner (hereinafter referred to as a runner) forming the flow path is cooled by the cooling water, it is preferable to form a cooling water flow path inside the runner or the like in order to improve the cooling efficiency of the runner or the like.

Further, in order to circulate the cooling water in the cooling water flow path, a discharge port for supplying the cooling water or discharging the cooling water is required. Further, in the water supply port or the discharge port, it is necessary to connect the cooling water flow path formed inside the runner or the like to the outside of the runner.

However, since the water supply port or the drain port communicates with the outside of the runner, the cooling water supplied from the water supply port or the cooling water supplied from the drain port may leak along the outer surface of the runner. As a result, when the cooling water leaking along the outer surface of the runner enters the flow path or the cavity, the molded article is deteriorated in quality.

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2002-18909 (Application Nos. 1 and 2, etc.)

The present invention has been made in an effort to solve the above problems, and an object thereof is to provide a runner capable of efficiently cooling a molten material filled in a gate and suppressing deterioration of quality of a molded article, and a method for producing the same.

A first feature of the present invention is a runner having a runner body having a cylindrical shape and having a gate provided inside the body, wherein the gate has a tip at one end that can be coupled to the injection port of the injection molding machine. The other end has a discharge port connectable to the mold cavity when being mounted on the mold, and a body water path buried in a part of the gate area; and a flange portion from the inlet of the sprue body The side end is expanded and connected to the sprue body, and a flange water passage connected to the body water passage and communicating with the outside is embedded.

A second aspect of the present invention provides a method for producing a runner, comprising: a step of coating a metal powder; and a hollow cone having a diameter which gradually increases from one end to the other end in a flow direction from the molten material in a cylindrical shape. The gate is formed inside the main body, and one end of the small diameter side of the gate is formed with an injection port connectable to the injection port of the injection molding machine, and the other end of the large diameter side of the gate is formed to be attached to the mold. And being connected to the discharge port of the mold cavity, and in a portion other than the gate area, a sprue body surrounding the body water path around the gate is embedded in the discharge port side of the gate, and The inlet end side of the sprue body is expanded, and is connected to the sprue body, and a flange portion water passage that is connected to the main body water passage and communicates with the outside is embedded, and the flange is attached to the mold. On the supported surface, a cross-sectional shape pattern in which the molten material flowing in the direction of the molten material of the water supply port and the flange portion of the water outlet connected to the flange water channel is provided, and the cross-sectional shape pattern is removed. a portion of the gate, the main body water passage, the flange water passage, the water supply port, and the water discharge port, which are subjected to hot working by irradiating the metal powder with laser light, and sintered one by one to form a three-dimensional shape; The step of cutting the three-dimensional shape is performed.

Hereinafter, the runner according to the embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to this embodiment. In the following description, the same or similar parts are given the same or like numerals, and the description thereof will be omitted. Also, please pay attention to the schematic diagram of the drawing, the ratio of each size is different from the actual object. Therefore, the specific dimensions and the like must be judged by the following description. Further, the drawings naturally contain portions having different dimensional relationships or ratios from each other. Further, in Fig. 1, in order to clarify the arrangement relationship inside the runner 10, the gate 12, the main body water passages 14a, 14b, 14c, the flange portion water passages 15a, 15b, the water supply port 16a, and the drain port are indicated by solid lines. 16b, the sprue body 61 and the flange portion 60 are indicated by imaginary lines. The same applies to Fig. 20 and Fig. 24 as in Fig. 1.

[First Embodiment]

Fig. 1 is a perspective view of a runner 10 according to a first embodiment of the present invention.

As shown in Fig. 1, the runner 10 of the first embodiment includes a sprue body 61 having a cylindrical shape and having a hollow slightly conical gate 12 whose diameter gradually increases from one end to the other end in the flow direction of the molten material. It is disposed inside the main body, and one end of the small diameter side of the gate 12 is formed with an injection port 11 connectable to the injection port of the injection molding machine, and the other end of the large diameter side of the gate 12 is formed to be connected to the mold. To the discharge port 13 of the mold cavity, in a portion other than the gate 12, in the discharge port 13 side of the gate 12, the body water paths 14a, 14b, 14c surrounding the gate 12 are embedded; and the flange The portion 60 is expanded from the side of the injection port 11 of the runner body 61, and is connected to the sprue body 61, and flanged water passages 15a, 15b connected to the main body water passages 14a, 14b, 14c and communicating with the outside are embedded. The water supply port 16a and the water discharge port 16b which are connected to the flange portion water passages 15a and 15b are provided on the supported surface when being attached to the mold.

As shown in Fig. 2, the main body water path 14 has a first main body water path 14a, a second main body water path 14b, and a third main body water path 14c. The first body water passage 14a and the second body water passage 14b are parallel to the center axis of the gate material 12 in the flow direction of the molten material. As shown in Fig. 3(a), one of the first main body water passage 14a and the second main body water passage 14b is connected to the water supply port 16a or the drain port 16b via the flange portion water passages 15a and 15b, respectively. As shown in Fig. 3(b), the other ends of the first main body water path 14a and the second main body water path 14b are on the side of the discharge port 16b of the gate, and surround the third main body water path 14c around the gate 12 to each other. connection.

As shown in Fig. 3(a), at least a portion of the flange portion water passage 15a is formed in the flange portion 60 (flange portion 60a). Further, the water supply port 16a and the main body water path 14a provided on the supported surface 10b are connected by a flange portion water passage 15a. Further, at least a portion of the flange portion water passage 15b is formed in the flange portion 60 (flange portion 60b). Further, the drain port 16b and the main body water path 14b provided on the supported surface 10c are connected by the flange portion water passage 15b.

As shown in Fig. 3(b), the body water path 14c is formed in the body portion 61 (the body portion 61a and the body portion 61b). The main body water path 14a and the main body water path 14b are connected by the main body water path 14c. Further, the body water path 14c has a semicircular arc shape surrounding the half circumference of the gate 12.

(Assembling of the runner) Hereinafter, the assembly of the runner 10 showing the actual use state of the runner 10 of the first embodiment will be described in detail with reference to Fig. 4 .

As shown in Fig. 4, the runner 10 has a pressing surface 10a that is pressed against the injection port portion 20 from which the molten material is injected. The runner 10 is assembled to the upper mold 31 (the upper mold 31a and the upper mold 31b) via the support surface 10b and the supported surface 10c. A water supply port 16a for supplying cooling water is provided on the supported surface 10b. A drain port 16b for discharging the cooling water is provided on the supported surface 10c.

The runner 10 has a gate portion 12 formed along the emission direction P of the molten material emitted from the injection port 21. The hollow portion connected to the discharge port 13 from the injection port 11 is formed inside the runner 10 by the gate 12. Further, the gate 12 has a shape that gradually expands from the injection port 11 to the discharge port 13 in order to prevent material from remaining in the gate 12.

Further, the injection port 11 is formed in the pressing surface 10a, which is an opening into which the molten material is injected. Further, the discharge port 13 is opened to the flow path 40 which will be described later.

The runner 10 has a tubular body water passage 14 (a main body water passage 14a and a main body water passage 14b) as a cooling water flow path formed along the molten material emission direction P.

The runner 10 has a cylindrical flange portion water passage 15 (a flange portion water passage 15a and a flange portion water passage 15b) as a cooling water flow path formed along the supported surface 10b and the supported surface 10c. The water supply port 16a and the main body water path 14a provided on the supported surface 10b are connected by a flange portion water passage 15a. The water supply port 16b and the main body water path 14b provided on the supported surface 10c are connected by a flange portion water passage 15b.

The upper mold 31a has a water supply passage 33a for supplying cooling water to the water supply port 16a. The upper mold 31b has a drain passage 33b for discharging the cooling water from the drain port 16b.

A spacer member 17a (for example, an O-ring or the like) for preventing leakage of cooling water from the water supply port 16a is provided between the supported surface 10b and the upper mold 31a. The spacer member 17a surrounds the periphery of the water supply port 16a. Further, between the supported surface 10c and the upper mold 31b, a spacer member 17b (for example, an O-ring or the like) for preventing leakage of the cooling water discharged from the drain port 16b is provided. The spacer member 17b surrounds the periphery of the drain port 16b.

A flow path 40 is formed between the lower mold 32 and the upper mold 31a and between the lower mold 32 and the runner 10. The cavity 50 and the gate 12 formed between the lower die 32 and the upper die 31a are connected by a flow path 40.

In this manner, the molten material ejected from the ejection port portion 20 is filled with the gate 12 and the flow path 40 filled in the cavity 50, and the molten material filled in the cavity 50 is formed into a shape after cooling. Take out the product.

Further, when the ejection port portion 20 is pressed against the pressing surface 10a, the pressure applied to the runner 10 is large, so that it is preferable that the flange portion 60a, the flange portion 60b, the body portion 61a, and the body portion 61b have A good strength metal is formed in one piece.

In the runner 10 of the first embodiment, the body portion 61 and the flange portion 60 are connected to each other without seams. That is, the runner 10 is integrally formed with the body portion 61 and the flange portion 60. Further, the body water passages 14a, 14b, 14c are formed in the body portion 61, and the flange portion water passages 15a, 15b are formed in the flange portion 60. Therefore, the cooling water flowing through the body water passages 14a, 14b, 14c directly cools the molten material filled in the gate 12, and the cooling efficiency of the molten material filled in the gate 12 can be improved.

Further, the main body water passages 14a, 14b, 14c and the flange portion water passages 15a, 15b outside the flange portion 60 are formed along the supported surfaces 16a, 16b. Further, when the injection port portion of the injection molding machine is pressed against the pressing surface 10a, the supported surfaces 16a, 16b provided on the flange portions 60a, 60b are pressed against the supporting member, so that the supported surfaces 16a, 16b and The support members will be tight. Therefore, it is difficult for the cooling water flowing in the body water passages 14a, 14b, 14c and the flange portion water passages 15a, 15b to leak along the side of the runner 10, and it is possible to suppress the cooling water from entering the flow passage or the cavity.

In this way, the molten material filled in the gate can be efficiently cooled, and the deterioration of the quality of the molded article can be suppressed.

(Manufacturing Method of Sprue) Next, a method of manufacturing the runner 10 will be described with reference to the drawings. Fig. 5 is a flow chart showing a method of manufacturing the runner 10 according to the first embodiment of the present invention. Figure 14 is a top view of the runner 10 in Fig. 2 upside down. Figures 9(a)(b), 10(a)(b), 11(a)(b), 12(a)(b) and 13(a)(b) A manufacturing process diagram of the runner 10 is shown, which corresponds to the C sectional view (Fig. 15), the D sectional view (Fig. 16), the E sectional view (Fig. 17), and the F sectional view of the runner 10 of Fig. 14 ( Figure 18) and G profile (Fig. 19). Further, in the first embodiment, the runner 10 is made of metal. An example in which the sprue 10 is manufactured using a metal photo-forming composite processing method will be described. Here, the "metal light forming composite processing method" is a method in which a metal powder material is sintered and stacked one by one by a hot working such as a YAG laser or a CO ₂ laser to form a three-dimensional shape. In the metal light forming composite processing method, Adding machining during machining to increase dimensional accuracy or surface roughness.

(1) First, the metal light-shaping composite processing apparatus 80 shown in Fig. 6 is prepared. The metal light-shaping composite processing apparatus 80 has a workpiece stage 81 that can hold the workpiece up and down, a metal powder stage 82 that holds the wall body 84 with the workpiece stage 81, and holds the metal powder 90 up and down, and is disposed on the surface of the metal powder 90. The plate body 83. The metal light shaping composite processing apparatus 80, as shown in Fig. 7, has a light source 86 that irradiates laser light and a processing machine 85. Further, the metal photo-forming composite processing apparatus is not limited to the metal photo-forming composite processing apparatus 80, and various other apparatuses can be used.

(2) Next, as shown in Fig. 5, in step S10, the metal powder as the material of the runner 10 is applied to a predetermined thickness. For example, as shown in Fig. 6, at least one side of the workpiece stage 81 and the metal powder stage 82 is raised and lowered to change the relative position. When the height of the surface of the metal powder 90 is higher than the upper end of the wall 84, the plate body 83 is actuated to make the metal. The powder is coated on the workpiece stage 81.

(3) In step S20, in a predetermined portion where the metal powder is applied, the region defined by the imaginary line of Fig. 8(a) is irradiated with laser light from the light source 86 to sinter the metal powder 91. In this case, the laser light is not irradiated at a portion where the cavity is required (corresponding to the gate 12, the body water path 14, the flange portion water path 15, the injection port 11, the water supply port 16a, and the drain port 16b). That is, the laser light is irradiated only to the flange portion 60 and the body portion 61. Thereby, as shown in Fig. 9 (a) and (b), the metal powder 91 is irradiated with laser light and integrated with the sintered portion.

(4) The metal powder 91 is applied onto the sintered body 10c in the same manner as in the step S10, and the laser light is irradiated in accordance with the region corresponding to the 10th (a) and (b) in the step S20. In this case, the portion corresponding to the gate 12 and the flange portion water passage 15 (the flange portion water passage 15a and the flange portion water passage 15b) shown in Fig. 16 is irradiated with the laser light at the corresponding flange portion 60 and A portion of the body portion 61 illuminates the laser light. Further, the sintered body 10D shown in Fig. 10(a)(b) can be obtained. Steps S10 and S20 are repeated to form sintered bodies 10E, 10F, and 10G shown in Figs. 11(a)(b), 12(a)(b), and 13(a)(b), and finally obtain Sprue 10.

In the step shown in Fig. 11 (a) and (b), the gate 12, the main body water path 14 (the main body water path 14a and the main body water path 14b) and the flange portion water path 15 (flange) shown in Fig. 17 are attached. Portions of the partial water passage 15a and the flange portion water passage 15b) are not irradiated with the laser light, and only the portions corresponding to the flange portion 60 and the body portion 61 are irradiated with the laser light.

In the step shown in Fig. 12(a)(b), the portion corresponding to the gate 12 and the body water path 14 shown in Fig. 18 is not irradiated with the laser light, and only the portion corresponding to the body portion 61 is irradiated with the thunder. Shoot light.

In the step shown in Fig. 13 (a) and (b), the portion corresponding to the gate 12 and the main body water path 14 (the main body water path 14c) shown in Fig. 19 is not irradiated with the laser light, and only the body portion is equivalent. Part of 61 illuminates the laser light.

(5) In step S30, it is determined whether or not the number of times (the number of repetitions) of step S10 and step S20 is repeated has reached a predetermined number of times. Moreover, when the number of repetitions reaches a predetermined number of times, the process proceeds to step S40, and when the number of repetitions does not reach the predetermined number of times, the process returns to step S10.

(6) In step S40, the machining machine 85 of Fig. 7 is actuated by the machining of the portion that has been sintered to perform a cutting process or the like to process a desired shape.

(7) In step S50, it is determined whether or not the runner 10 has been completed. When the runner 10 has been completed, the series of processes is ended, and when the runner 10 has not been completed, the process returns to step S10.

In this way, the coating and sintering of the metal powder are repeated, and the runner 10 is produced by processing the sintered portion each time the number of repetitions of coating and sintering reaches a predetermined number.

As shown in Figs. 15 to 19, the runner 10 having a complicated shape can be easily manufactured by using a metal photoforming composite processing method.

(Operation and Effect) When the runner 10 according to the first embodiment of the present invention is used, the runner 10 is formed integrally with the flange portion 60 and the body portion 61. That is, the flange portion 60 is connected to the body portion 61 without seams. Further, the body water passage 14 is formed in the body portion 61, and the flange portion water passage 15 is formed in the flange portion 60. Therefore, the cooling ability of the cooling water flowing in the body portion 61 is directly transmitted to the molten material filled in the gate 12, and the cooling efficiency of the molten material filled in the gate 12 can be improved.

Further, the flange portion water passage 15 that connects the main body water passage 14 and the water supply port 16a (or the drain port 16b) is formed along the supported surface 10b (or the support surface 10c). Further, when the ejection port portion 20 is pressed against the pressing surface 10a, the supported surface 10b (or the supporting surface 10c) provided in the flange portion 60 is pressed against the upper mold 31, so that the supported surface 10b (or the support) The face 10c) is in close contact with the upper die 31. Therefore, the cooling water flowing in the body water passage 14 and the flange portion water passage 15 does not leak along the side surface of the runner 10, and the cooling water can be prevented from entering the flow passage 40 or the cavity 50.

In this way, the molten material filled in the gate can be efficiently cooled, and the deterioration of the quality of the molded article can be suppressed.

Further, when the runner 10 according to the first embodiment of the present invention is used, the main body water passage 14c having a semicircular arc shape surrounding the half circumference of the gate 12 is provided on the discharge port 13 side. That is, the volume of the body water passage 14 on the discharge port 13 side is larger than the volume of the body water passage 14 on the injection port 11 side.

Therefore, in the discharge port 13 side where the volume of the gate 12 is large, the flow rate of the cooling water flowing through the body water passage 14 is increased, so that the cooling effect of the molten material filled in the gate 12 can be improved.

[Second Embodiment]

The second embodiment of the present invention is mainly described as different from the first embodiment.

In the runner 101 of the second embodiment, the main body water path 14d and the main body water path 14e have a slope of the inner wall of the gate 12 which is enlarged along the end.

As shown in Fig. 20, the gate 12 has a shape which gradually expands from the injection port 11 to the discharge port 13. That is, as shown in Fig. 21, the extension line L _{1 of the} inner wall 12a of the gate 12 has a slope α with respect to a straight line L _{P which is} substantially parallel to the direction in which the molten material is emitted. Further, the extension line L _{2 of the} inner wall 12b of the gate 12 has a slope β with respect to a straight line L _{P which is} substantially parallel to the direction in which the molten material is emitted. Moreover, the slope α and the slope β may be the same or different.

The body water passage 14a has a slope along the inner wall 12a of the gate 12. Specifically, the center line C _{1 of the main} body water path 14a has a slope α with respect to the straight line L _{P which is} substantially parallel to the direction in which the molten material is emitted, similarly to the inner wall 12a. That is, the distance between the main body water path 14a and the inner wall 12a of the gate 12 is kept constant.

Similarly, the body water passage 14b has a slope along the inner wall 12b of the gate 12. Specifically, the center line C _{2 of the main} body water path 14b has a slope β with respect to the straight line L _{P which is} substantially parallel to the direction in which the molten material is emitted, similarly to the inner wall 12b. That is, the distance between the body water path 14b and the inner wall 12b of the gate 12 is kept constant.

(Operation and Effect) When the runner 10 according to the second embodiment of the present invention is used, the main body water passage 14a has a slope along the inner wall 12a of the gate 12, so the distance between the main body water passage 14a and the inner wall 12a of the gate 12 is It is kept constant to reduce the unevenness of cooling of the molten material filled in the gate 12. Similarly, the body water passage 14b has a slope along the inner wall 12b of the gate 12, so that the distance between the body water passage 14b and the inner wall 12b of the gate 12 is kept constant, and the molten material filled in the gate 12 can be reduced. The cooling is uneven.

[Third embodiment]

Hereinafter, the third embodiment of the present invention will be mainly described as being different from the first embodiment.

As shown in Fig. 22, in the runner 102 according to the third embodiment of the present invention, the main body water passage has a first main body water passage 14a, a fourth main body water passage 14d, and a fifth main body water passage 14e. The first body water passage 14a is parallel to the gate center axis. One end of the first main body water passage 14a is connected to the water supply port via a flange portion water passage, and the other end of the first main body water passage 14a is connected to the fourth main body water passage 14d, and the fourth main body water passage 14d flows through the gate molten material. The cross-sectional shape that can be straight in the direction surrounds the gate in the large-diameter side of the gate defined by a circle including a circle of the gate section and a circular arc of a concentric circle, which is defined by a C-shaped area. The other end of the fourth body water passage 14d is connected to the drain port 16b via the flange portion water passage 15b.

In the first embodiment, the third main body water passage 14c that connects the first main body water passage 14a and the second main body water passage 14b has a semicircular arc shape that surrounds the half circumference of the gate 12. On the other hand, in the third embodiment, the fourth main body water passage 14d that connects the first main body water passage 14a and the fifth main body water passage 14e has an approximately circular arc shape that substantially surrounds the entire circumference of the gate 12.

As shown in Figs. 23 and 24, the fifth body water path 14e has a spiral shape along the gate 12. Further, the fourth body water passage 14d has an approximately circular arc shape which approximately surrounds the entire circumference of the gate 12.

(Operation and Effect) When the runner 10 according to the third embodiment of the present invention is used, the fourth main body water passage 14d that connects the first main body water passage 14a and the fifth main body water passage 14e has an approximate circle approximately rounded around the entire circumference of the gate 12. Arc shape. Further, the fourth main body water passage 14d is provided on the discharge port 13 side. In other words, the volume of the fourth main body water passage 14d provided on the discharge port 13 side is larger than that of the first embodiment.

Therefore, in the discharge port 13 side where the volume of the gate 12 is large, the flow rate of the cooling water is larger than that of the first embodiment, so that the cooling effect of the molten material filled in the gate 12 can be improved.

[Other Embodiments]

The present invention has been described in terms of its embodiments, and the description and drawings which constitute a part of this disclosure are not intended to limit the invention. The applicant can implement various alternative embodiments, embodiments, and techniques of operation by this disclosure.

For example, in the first embodiment to the third embodiment, the water supply port 16a is formed on the supported surface 10b, and the water discharge port 16b is formed on the supported surface 10c. However, the present invention is not limited thereto. Specifically, the water supply port 16a and the water discharge port 16b may be provided at any portion other than the pressing surface 10a.

In the first embodiment to the third embodiment, the water passage main body 14 and the flange portion water passage 15 have a tubular shape. However, the present invention is not limited thereto. Specifically, the shape of the water passage body 14 can be appropriately changed in accordance with the cooling efficiency of the molten material filled in the gate 12. Further, the shape of the flange portion water passage 15 can be appropriately changed in accordance with the cooling water efficiency or the cooling water drainage efficiency.

In the first embodiment to the third embodiment, the main body water passage 14c that connects the main body water passage 14a and the main body water passage 14b is provided on the discharge port 13 side. However, the present invention is not limited thereto. Specifically, the number of the main body water passages 14c may be plural, and the position of the main body water passage 14c may be provided closer to the injection port 11 than the first embodiment to the third embodiment.

In the first to third embodiments, the support member supporting the runner 10 is the upper mold 31, but the present invention is not limited thereto. In particular, the support member supporting the runner 10 may also be provided as an individual from the upper mold 31.

In the first to third embodiments, the runners 10, 101, and 102 are manufactured by a metal photolithography composite processing method, but the present invention is not limited thereto. Specifically, the gate 12, the main body water path 14, the flange portion water path 15, the injection port 11, the water supply port 16a, and the water discharge port 16b may be formed by cutting the metal blocks constituting the runners 10, 101, and 102. Further, the wax corresponding to the gate 12, the main body water path 14, the flange portion water passage 15, the injection port 11, the water supply port 16a, and the drain port 16b may be disposed in the casting furnace, and the material used to constitute the runner 10 may be poured into the casting. The wax is melted in the furnace, whereby the gate 12, the main body water path 14, the flange portion water path 15, the injection port 11, the water supply port 16a, and the water discharge port 16b can be formed.

In the first to third embodiments, the water supply port 16a and the water discharge port 16b are formed. In this case, as long as the flow direction of the cooling water is maintained in one direction, not only the cooling water may be injected from the water supply port 16a but also discharged from the water discharge port 16b, and may be injected from the water discharge port 16b and discharged from the water supply port 16a.

This application is accompanied by an invention based on the priority claim of the Japanese Patent Application No. 2006-262536 (filed on Sep. 27, 2008, filed on Sep. 27, 2011). Extract some of its contents.

[Industrial Availability]

When the present invention is used, it is possible to provide a runner which can efficiently cool a molten material filled in a gate and which can suppress deterioration of quality of a molded article, and a method for producing the same.

10‧‧‧Runner

11‧‧‧Injection

12‧‧‧Gate

13‧‧‧Export

20‧‧‧Ejection Department

21‧‧‧ shots

31‧‧‧上模

32‧‧‧Down

40‧‧‧ flow path

50‧‧‧ cavity

61‧‧‧ body part

80‧‧‧Metal light modeling composite processing device

81‧‧‧Workpiece table

82‧‧‧Metal powder table

83‧‧‧ boards

85‧‧‧Processing machine

86‧‧‧Light source

90‧‧‧Metal powder

91‧‧‧Metal powder

101‧‧‧Runner

102‧‧‧Runner

10a‧‧‧Face

10b‧‧‧Supported surface

10c was. . . Support surface

10C, 10D, 10E, 10F, 10G. . . Sintered body

12a, 12b. . . Inner wall

14a, 14b, 14c. . . Body waterway

14d, 14e. . . Body waterway

15a, 15b. . . Flange waterway

16a. . . Water supply port

16b. . . Drainage port

17a. . . Gasket member

17b. . . Gasket member

31a. . . Upper mold

31b. . . Upper mold

33a. . . Water supply path

33b. . . Drainage path

60a, 60b. . . Flange part

Fig. 1 is a perspective view of a runner 10 according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view showing the configuration of a runner 10 according to the first embodiment of the present invention.

3(a) and 3(b) are cross-sectional views showing the configuration of the runner 10 according to the first embodiment of the present invention.

Fig. 4 is a cross-sectional view for explaining the assembly of the runner 10 according to the first embodiment of the present invention.

Fig. 5 is a flow chart showing a method of manufacturing the runner 10 according to the first embodiment of the present invention.

Fig. 6 is a manufacturing process diagram (schematic diagram of the manufacturing apparatus) of the runner 10 according to the first embodiment of the present invention.

Fig. 7 is a manufacturing process diagram (schematic diagram of the manufacturing apparatus) of the runner 10 according to the first embodiment of the present invention.

Figs. 8(a) and 8(b) are views showing a manufacturing process of the runner 10 according to the first embodiment of the present invention.

Fig. 9 is a manufacturing process diagram of the runner 10 according to the first embodiment of the present invention ((a) is a plan view, and (b) is a cross-sectional view).

Fig. 10 is a manufacturing process diagram of the runner 10 according to the first embodiment of the present invention ((a) is a plan view, and (b) is a cross-sectional view).

Fig. 11 is a manufacturing process diagram of the runner 10 according to the first embodiment of the present invention ((a) is a plan view, and (b) is a cross-sectional view).

Fig. 12 is a manufacturing process diagram of the runner 10 according to the first embodiment of the present invention ((a) is a plan view, and (b) is a cross-sectional view).

Fig. 13 is a manufacturing process diagram of the runner 10 according to the first embodiment of the present invention ((a) is a plan view, and (b) is a cross-sectional view).

Fig. 14 is a schematic view for explaining a method of manufacturing the runner 10 according to the first embodiment of the present invention.

Figure 15 is a cross-sectional view for explaining a runner 10 according to a first embodiment of the present invention.

Figure 16 is a cross-sectional view for explaining a runner 10 according to a first embodiment of the present invention.

Figure 17 is a cross-sectional view for explaining a runner 10 according to a first embodiment of the present invention.

Figure 18 is a cross-sectional view for explaining a runner 10 according to a first embodiment of the present invention.

Figure 19 is a cross-sectional view for explaining a runner 10 according to a first embodiment of the present invention.

Fig. 20 is a perspective view for explaining a runner 10 according to a first embodiment of the present invention.

Figure 21 is a cross-sectional view showing the configuration of a runner 10 according to a second embodiment of the present invention.

Figure 22 is a perspective view for explaining a runner 10 according to a third embodiment of the present invention.

Figure 23 is a cross-sectional view showing the structure of a runner 10 according to a third embodiment of the present invention.

Figs. 24(a) to (c) are cross-sectional views showing the configuration of a runner 10 according to a third embodiment of the present invention.

10‧‧‧Runner

11‧‧‧Injection

12‧‧‧Gate

13‧‧‧Export

14a, 14b, 14c‧‧‧ body waterway

15a, 15b‧‧‧Flange waterway

16a‧‧‧Water supply port

16b‧‧‧Drainage

60‧‧‧Flange section

61‧‧‧ body part

Claims (13)

A runner having a sprue body having a cylindrical shape and having a gate provided inside the body, wherein the gate has an injection port at one end that can be coupled to the injection port of the injection molding machine, and the other end has a mounting hole in the mold. And connecting to the discharge port of the mold cavity, and the main body water path is embedded in a part of the gate area; and the flange portion is expanded from the injection port side end of the sprue body, and the sprue a body connecting and embedding a flange portion water passage connected to the body water passage and communicating with the outside; wherein the flange portion is connected to the flange portion water passage when being attached to the mold surface Water supply and drain. The sprue according to the first aspect of the invention, wherein the gate is a hollow slightly conical shape whose diameter gradually increases from one end to the other end in the flow direction of the molten material. The sprue according to claim 1, wherein the main body water passage surrounds the gate portion in the gate discharge port side. The runner according to claim 3, wherein the body water passage surrounds the gate in the discharge port side of the runner body so as to be straight in the flow direction of the gate molten material. The cross-sectional shape is defined by a slightly C-shaped cross section including a circle of the gate section and a circular arc of a concentric circle. The runner according to claim 1, wherein the volume of the body water passage on the mold side is larger than the volume of the body water on the injection port side The volume of the road is even larger. A runner having a sprue body and having a cylindrical shape, and a hollow slightly conical gate which gradually increases in diameter from one end to the other end in the flow direction of the molten material is disposed inside the body, and the small diameter side of the gate An injection port connectable to the injection port of the injection molding machine is formed at one end, and the other end of the large diameter side of the gate is formed with a discharge port connectable to the mold cavity when attached to the mold, except for the gate area In one part, a body water path surrounding the gate is embedded in the discharge port side of the gate; and a flange portion is expanded from the injection port side end of the runner body, and the runner The main body is connected to each other, and a flange portion water passage that is connected to the main body water passage and communicates with the outside is embedded, and the flange portion is connected to the flange portion water passage when being attached to the mold surface. Water supply and drain. The sprue according to claim 6, wherein the main body water passage has a first main body water passage, a second main body water passage, and a third main body water passage, and the first main body water passage and the second main body water passage system and the pouring The center axis of the flow direction of the molten material in the mouth is parallel, and the first body water path and the one end of the second body water path are respectively connected to the water supply port or the water discharge port via the flange portion water passage, and the first body water path and the second body are respectively The other end of the water passage is connected to each other in the discharge port side of the gate so as to surround the third body water passage around the gate. The runner according to claim 7, wherein the first body water passage and the second body water passage are provided along the gate The slope of the wall. The sprue according to claim 6, wherein the main body water path includes a first main body water path, a fourth main body water path, and a fifth main body water path, and the first main body water path parallel to the gate center axis is formed. One end of the first main body water passage is connected to the water supply port via the flange portion water passage, and the other end of the first main body water passage is connected to the fourth main body water passage, and the fourth main body water passage is connected to the gate molten material. a cross-sectional shape that can be straight in the flow direction, surrounded by the gates, including the circle of the gate section and the arc of the concentric circle, which is defined by a C-shaped area, surrounding the gate, the fourth The other end of the main body water passage is connected to the water outlet through the flange portion water passage. A method for manufacturing a runner, comprising: a step of coating a metal powder; and is provided in the body according to a hollow conical gate having a cylindrical shape and gradually increasing in diameter from one end to the other end in the flow direction of the molten material The injection port is connected to the injection port of the injection molding machine at one end of the small diameter side of the gate, and the other end of the large diameter side of the gate is formed with a row that can be coupled to the mold cavity when attached to the mold. a sprue body enclosing a body water path surrounding the gate, and a side of the inlet port of the sprue body, in a portion of the outlet port of the gate, except for one of the gate regions The end portion is expanded and connected to the sprue body, and a flange portion water passage that is connected to the main body water passage and communicates with the outside is embedded, and the flange portion is provided on a supported surface when the mold is attached to the mold. Water supply port and drainage connected to the aforementioned flange water channel a cross-sectional shape pattern in which the molten material flowing in the direction of the molten material of the sprue portion of the mouth can be removed, and the portion corresponding to the gate, the main body water passage, the flange water passage, the water supply port, and the drain port is removed a step of illuminating the metal powder by the irradiation of the metal powder, sintering one by one to form a three-dimensional shape, and performing a cutting process on the three-dimensional shape. The method for manufacturing a sprue according to claim 10, wherein the main body water path has a first main body water path, a second main body water path, and a third main body water path, and the first main body water path and the second main body water path system Parallel to the central axis of the flow direction of the gate molten material, the first main body water path and one of the second main body water paths are respectively connected to the water supply port or the drain port via the flange portion water passage, the first main body water path and The other end of the second body water passage is connected to each other on the discharge port side of the gate so as to surround the third body water passage around the gate. The method for manufacturing a sprue according to claim 10, wherein the first main body water passage and the second main body water passage have inclination along an inner wall of the gate. The method for manufacturing a sprue according to claim 10, wherein the main body water passage includes a first main body water passage, a fourth main body water passage, and a fifth main water passage, and is formed to be parallel to the center axis of the gate. a main body water passage, one end of the first main body water passage is connected to the water supply port via the flange portion water passage, and the other end of the first main body water passage is connected to the fourth main body water passage, and the fourth main body water passage is connected to the water supply a cross-sectional shape that can be straight in the direction of flow of the molten material of the mouth to include the circle of the aforementioned gate profile And the large-diameter side of the gate defined by the C-shaped area of the concentric circle is defined by a C-shaped area, surrounding the gate, and the other end of the fourth main body water passage is connected to the flange portion water passage to the aforementioned Drainage port.