KR20090091110A - Sprue bush and its production 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. ® KIPO & WIPO 2009

Description

Sprue bush and its manufacturing method {SPRUE BUSH AND ITS PRODUCTION METHOD}

The present invention relates to a sprue bush and a manufacturing method thereof.

Conventionally, injection molding for molding a product by injecting a molten material (hereinafter, referred to as a molten material) by heating into a mold is generally known.

Specifically, the metal mold | die used for injection molding has the sprue bush which press-contacts the injection port part of the injection molding machine which injects a molten material, and the shape part for forming a molded article. The mold has a sprue bush having a sprue which is a space into which the molten material is injected, a cavity which is a space where the molten material is filled, and a runner which is a flow path of the molten material. Through the runner, the sprue and cavity are connected.

In such an injection molding die, after the molten material filled in the cavity is sufficiently cooled and hardened, the molded article is taken out of the cavity. At this time, the operation of taking out the molded article is performed after the molten material filled in the sprue and the runner is sufficiently cooled and solidified in order to prevent the material from remaining in the sprue and the runner.

In general, the volume per unit area is larger in the sprue and runner than in the cavity. Therefore, the time required for the molten material filled in the sprue or runner to harden is longer than the time required for the molten material filled in the cavity to harden. For this reason, the shortening of the time required for the molten material packed in the sprue or runner to harden contributes to the improvement of production efficiency.

On the other hand, the injection molding metal mold | die which aims at shortening the time required until the molten material filled in the runner etc. hardens by forming the flow path of a cooling water in the member which forms a runner etc. (for example, patent document 1) is proposed. ).

Here, when cooling the member and sprue bush (henceforth sprue bush etc.) which form a runner with a cooling water, in order to improve the cooling efficiency of a sprue bush etc., the flow path of a cooling water is carried out inside sprue bushes. It is preferable to form.

On the other hand, in order to circulate the cooling water in the flow path of the cooling water, a water supply for supplying the cooling water or a drain for draining the cooling water is required. In addition, the water supply or the drain port needs to connect the flow path of the cooling water formed inside the sprue bush and the like to the outside of the sprue bush.

However, since the water supply or the drain port communicates with the outside of the sprue bush, the cooling water supplied from the water supply port or the cooling water drained from the drain port may leak along the outer surface of the sprue bush. As described above, when the coolant leaked along the outer surface of the sprue bush enters the runner or the cavity, deterioration of the quality of the molded article occurs.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2002-18909 (claim 1, FIG. 2, etc.)

This invention is made | formed in order to solve the above-mentioned subject, and an object of this invention is to provide the sprue bush which can cool the molten material filled in sprue efficiently, and can suppress the quality deterioration of a molded article, and its manufacturing method. .

A first feature of the present invention is provided with a sprue having an injection hole formed at one end thereof so as to be connectable to an injection hole of an injection molding machine, and having a sprue having an outlet formed at the other end thereof so as to be connectable to a mold cavity. The cylindrical sprue bush body in which the main body channel is embedded in a part of the region excluding the sprue, and protrudes from the injection port side end of the sprue bush body, is connected to the sprue bush body, and is continuous to the main body channel. The sputter bush which has the flange part in which the flange part channel which communicates with the exterior is embedded is made into the summary.

According to a second aspect of the present invention, there is provided a process of applying a metal powder, and a hollow substantially conical sprue having a larger diameter from one end in the flow direction of the molten material toward the other end is provided in the main body, and the small diameter of the sprue. An injection hole is formed at one end of the injection molding machine so as to be connected to the injection port part, and a discharge hole is formed at the other end of the large diameter side of the sprue to be connected to the mold cavity when attached to the mold. A cylindrical sprue bush main body in which a main body channel is embedded on the outlet side of the sprue so as to surround the sprue, and protrudes from the inlet side end of the sprue bush main body and is connected to the sprue bush main body. The flange channel is buried so as to pass through to the outside. Based on the pattern of the cross-sectional shape obtained orthogonally to the flow direction of the molten material of the sprue bush which has the flange part provided with the drain port, the part corresponding to a sprue, a main body channel, a flange part channel, a water supply port, and a drain port is excluded. The manufacturing method of the sprue bush which includes the process of carrying out the heat processing by laser beam irradiation to a metal powder, and further sintering and pile up to form a three-dimensional shape, and the process of performing a cutting process to a three-dimensional shape.

1 is a perspective view of a sprue bush 10 according to the first embodiment of the present invention.

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

3 is a cross-sectional view showing the configuration of a sprue bush 10 according to the first embodiment of the present invention.

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

5 is a flowchart showing a manufacturing method of the sprue bush 10 according to the first embodiment of the present invention.

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

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

8 is a manufacturing process diagram of the sprue bush 10 according to the first embodiment of the present invention.

9 is a manufacturing process diagram ((a) top view and (b) cross-sectional view) of the sprue bush 10 according to the first embodiment of the present invention.

10 is a manufacturing process diagram ((a) top view, (b) cross-sectional view) of the sprue bush 10 according to the first embodiment of the present invention.

11 is a manufacturing process diagram ((a) top view and (b) cross-sectional view) of the sprue bush 10 according to the first embodiment of the present invention.

12 is a manufacturing process drawing ((a) top view, (b) cross-sectional view) of the sprue bush 10 according to the first embodiment of the present invention.

13 is a manufacturing process diagram ((a) top view and (b) cross-sectional view) of the sprue bush 10 according to the first embodiment of the present invention.

14 is a view for explaining a method for manufacturing the sprue bush 10 according to the first embodiment of the present invention.

15 is a cross-sectional view of the sprue bush 10 according to the first embodiment of the present invention.

16 is a cross-sectional view of the sprue bush 10 according to the first embodiment of the present invention.

17 is a cross-sectional view of the sprue bush 10 according to the first embodiment of the present invention.

18 is a cross-sectional view of the sprue bush 10 according to the first embodiment of the present invention.

19 is a cross-sectional view of the sprue bush 10 according to the first embodiment of the present invention.

20 is a perspective view of a sprue bush 10 according to the second embodiment of the present invention.

FIG. 21: is sectional drawing which shows the structure of the sprue bush 10 which concerns on 2nd Embodiment of this invention.

22 is a perspective view of a sprue bush 10 according to the third embodiment of the present invention.

FIG. 23: is sectional drawing which shows the structure of the sprue bush 10 which concerns on 3rd Embodiment of this invention.

24 is a cross-sectional view showing a configuration of a sprue bush 10 according to the third embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, although the sprue bush which concerns on embodiment of this invention is demonstrated referring drawings, this invention is not limited to embodiment. In addition, in description of the following drawings, the same or similar code | symbol is attached | subjected to the same or similar part, and description is abbreviate | omitted. In addition, it is to be noted that the drawings are schematic, and ratios of the respective dimensions are different from those in reality. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, of course, the part from which the relationship and the ratio of a mutual dimension differ also in between drawings is contained. In addition, in FIG. 1, the sprue 12, the main body channel 14a, 14b, 14c, the flange part channel 15a, 15b, the water supply port from a viewpoint of clarifying the arrangement relationship inside the sprue bush 10. In FIG. 16a and the drain port 16b are shown by the solid line, and the sprue bush main body 61 and the flange part 60 are shown by the dashed-dotted line. Also in FIG. 20, FIG. 24, it is the same as FIG.

[First Embodiment]

1 shows a perspective view of a sprue bush 10 according to the first embodiment of the present invention.

As shown in FIG. 1, the sprue bush 10 according to the first embodiment includes a hollow spherical cone 12 having a larger diameter from one end in the flow direction of the molten material toward the other end. It is provided inside the main body, the injection hole 11 is formed in the small diameter side end of the sprue 12 so as to be connected to the injection port of the injection molding machine, and when attached to the mold at the other end of the large diameter side of the sprue 12 A discharge port 13 is formed so as to be connectable to the cavity of the mold, and the main body channel so as to surround the sprue 12 around the spout 12 side of the sprue 12 in a part of the region except the sprue 12. A sprue bush body 61 having a cylindrical shape in which 14a, 14b, and 14c are embedded,

The flange part channel 15a, which protrudes from the injection port 11 side end of the sprue bush main body 61, is connected to the sprue bush main body 61, and passes through the main body channels 14a, 14b, 14c to the outside. 15b) is embedded and the flange part 60 provided with the water supply port 16a and the drain port 16b continuous to the flange part channel 15a, 15b is provided in the sebum surface at the time of being attached to the metal mold | die.

As shown in FIG. 2, the main body channel 14 includes a first main body channel 14a, a second main body channel 14b, and a third main body channel 14c. The 1st main body channel 14a and the 2nd main body channel 14b are formed in parallel with the central axis of the flow direction of the molten material of the sprue 12. As shown in Fig. 3A, one end of the first main body channel 14a and the second main body channel 14b is connected to the water supply port 16a or the drain port through the flange channel channels 15a and 15b, respectively. 16b). As shown in FIG. 3B, the other ends of the first main body channel 14a and the second main body channel 14b surround the sprue 12 at the spout outlet 13 side. It is connected to each other by the formed 3rd main body channel 14c.

As shown in Fig. 3A, at least a part of the flange channel 15a is formed in the flange portion 60 (flange portion 60a). Moreover, the water supply port 16a provided in the sebum surface 10b and the main body channel 14a are connected through the flange part channel 15a. On the other hand, at least a part of the flange portion channel 15b is formed in the flange portion 60 (flange portion 60b). Moreover, the drain port 16b formed in the sebum surface 10c and the main body channel 14b are connected through the flange part channel 15b.

As shown in Fig. 3B, the main body channel 14c is formed in the main body portion 61 (main body portion 61a and main body portion 61b). The main body channel 14a and the main body channel 14b are connected through the main body channel 14c. Moreover, the main body channel 14c has the shape of the semi-circular arc which surrounds the sprue 12 over the circumferential half.

(Assembling of Sprue Bush)

The sprue bush 10 will be described in more detail with reference to FIG. 4, which is an assembled view of the sprue bush 10 showing the actual use state of the sprue bush 10 according to the first embodiment.

As shown in FIG. 4, the sprue bush 10 has a pressure contact surface 10a to which the injection port part 20 for injecting molten material is pressed in contact. The sprue bush 10 is assembled to the upper mold 31 (upper mold 31a and upper mold 31b) through the sebum surface 10b and the sebum surface 10c. A water supply port 16a for supplying cooling water is formed in the sebum surface 10b. A drain port 16b for draining the cooling water is formed in the sebum surface 10c.

The sprue bush 10 has the sprue 12 formed along the injection direction P of the molten material which the injection port part 20 injects from the injection port 21 with. The sprue 12 forms a hollow portion from the injection port 11 to the discharge port 13 inside the sprue bush 10. In addition, the sprue 12 has a curved fan shape gradually widening from the injection port 11 toward the discharge port 13 in order to prevent the material from remaining in the sprue 12.

In addition, the injection port 11 is formed in the pressure contact surface 10a and is an opening into which molten material is injected. Moreover, the discharge port 13 is opened toward the runner 40 mentioned later.

The sprue bush 10 has a cylindrical main body channel 14 (main body channel 14a and main body channel 14b) that is a flow path of cooling water formed along the injection direction P of the molten material.

The sprue bush 10 is a cylindrical flange part channel 15 (flange part channel 15a and flange part channel 15b) which is a flow path of cooling water formed along the sebum surface 10b and the sebum surface 10c. Has The water supply port 16a formed in the sebum surface 10b and the main body channel 14a are connected through the flange part channel 15a. Through the flange part channel 15b, the drain port 16b formed in the sebum surface 10c and the main body channel 14b are connected.

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 draining the cooling water from the drain port 16b.

Between the sebum surface 10b and the upper die 31a, a packing member 17a (for example, an O-ring or the like) is provided to prevent leakage of the cooling water supplied from the water supply port 16a. The packing member 17a is provided to surround the water supply port 16a. On the other hand, a packing member 17b (for example, an O-ring or the like) is provided between the supported surface 10c and the upper mold 31b to prevent leakage of cooling water drained from the drain port 16b. The packing member 17b is provided so as to surround the drain opening 16b.

The runner 40 is formed between the lower mold 32 and the upper mold 31a and between the lower mold 32 and the sprue bush 10. Through the runner 40, the cavity 50 and the sprue 12 formed between the lower mold 32 and the upper mold 31a are connected.

In this way, the molten material injected by the injection port part 20 is filled in the cavity 50 through the sprue 12 and the runner 40, and the molten material filled in the cavity 50 is cooled after being cooled. It is taken out as a molded article.

In addition, since the pressure exerted on the sprue bush 10 when the injection port portion 20 is in pressure contact with the pressure contact surface 10a is large, the flange portion 60a, the flange portion 60b, the main body portion 61a, and The main body portion 61b is preferably configured as an integral member by a metal having good strength.

As for the sprue bush 10 which concerns on 1st Embodiment, the main-body part 61 and the flange part 60 are connected seamlessly. That is, the sprue bush 10 is equipped with the main body part 61 and the flange part 60 as an integral member. In addition, the main body channels 14a, 14b, 14c are formed in the main body portion 61, and the flange part channels 15a, 15b are formed in the flange portion 60. As shown in FIG. Therefore, the cooling water flowing through the main body channels 14a, 14b, 14c directly cools the molten material filled in the sprue 12, thereby improving the cooling efficiency of the molten material filled in the sprue 12.

Moreover, the main body channel 14a, 14b, 14c and the flange part channel 15a, 15b connected with the exterior of the flange part 60 are formed along sebum surface 10b, 10c. Further, when the injection port portion of the injection molding machine is in pressure contact with the pressure contact surface 10a, the sebum surface 10b, 10c provided on the flange portions 60a, 60b is press-attached to the support member, so that the sebum surface 10b, 10c And the support member are in close contact. Therefore, the coolant flowing in the main body channels 14a, 14b and 14c and the flange channel channels 15a and 15b is less likely to leak along the side surface of the sprue bush 10, and the coolant can be prevented from entering the runner or the cavity. have.

Thus, the molten material filled in the sprue can be cooled efficiently and the quality deterioration of a molded article can be suppressed.

(Manufacturing method of sprue bush)

Next, the manufacturing method of the sprue bush 10 is further demonstrated, referring drawings. 5 is a flowchart illustrating a method of manufacturing the sprue bush 10 according to the first embodiment of the present invention. 14 reverses the top and bottom of the sprue bush 10 of FIG. (A) and (b) of FIG. 9, (a) and (b) of FIG. 10, (a) and (b) of FIG. 11, (a) and (b) of FIG. 12, and (a) of FIG. And (b) shows a manufacturing process diagram of the sprue bush 10, respectively, C sectional view (FIG. 15), D sectional view (FIG. 16), E sectional view (FIG. 17), F of the sprue bush 10 of FIG. It corresponds to sectional drawing (FIG. 18), G sectional drawing (FIG. 19). In addition, in 1st Embodiment, the sprue bush 10 is comprised by the metal. An example in which the sprue bush 10 is manufactured using the metal light shaping composite processing method will be described. Here, the "metal light shaping composite processing method" refers to a metal light shaping processing method in which a metal powder material is further sintered and piled up by thermal processing such as a YAG laser or a CO ₂ laser, and forms a three-dimensional shape. In addition to the processing, the processing method which improved the dimensional accuracy and the surface roughness.

(A) First, a metal light shaping composite processing apparatus 80 as shown in FIG. 6 is prepared. The metal light-like composite processing apparatus 80 is capable of lifting and lowering the movable work stage 81 for holding the work and the metal powder 90 arranged with the wall 84 interposed between the work stage 81. The metal powder stage 82 and the blade 83 arrange | positioned at the surface of the metal powder 90 are provided. The metal light shaping composite processing apparatus 80 further includes a light source 86 for irradiating laser light and a processing machine 85 as shown in FIG. 7. In addition, as a metal light shaping composite processing apparatus, it does not specifically limit to the metal light shaping composite processing apparatus 80, Various apparatuses can be used.

(B) Next, as shown in FIG. 5, in step S10, a metal powder, which is a material of the sprue bush 10, is applied over a predetermined thickness. For example, as shown in FIG. 6, at least one of the work stage 81 and the metal powder stage 82 is elevated to change the relative position, and the surface of the metal powder 90 is higher than the top of the wall 84. The blade 83 is then operated to apply metal powder onto the work stage 81.

(C) In step S20, the metal powder 91 is sintered by irradiating a laser beam from the light source 86 to a region (pattern) defined by the virtual line of FIG. do. In this case, the part to be a cavity (corresponding to the sprue 12, the main body channel 14, the flange channel 15, the injection port 11, the water supply port 16a, and the drain port 16b described above) Is not irradiated with a laser beam. That is, the laser beam is irradiated only to the portions corresponding to the flange portion 60 and the main body portion 61. As a result, as shown in FIGS. 9A and 9B, the metal powder 91 is integrated with the portion already sintered by the irradiation of the laser light.

(D) In the same manner as in step S10, the metal powder 91 is applied onto the sintered body 10C, and the laser beam is irradiated in step S20 according to the pattern corresponding to Figs. 10A and 10B. In this case, the portion corresponding to the sprue 12 and the flange portion channel 15 (the flange portion channel 15a and the flange portion channel 15b) shown in FIG. 16 is not irradiated with a laser beam, and the flange portion ( 60) and only the part corresponding to the main body part 61 is irradiated with a laser beam. And the sintered compact 10D as shown to FIG. 10 (a) and (b) is obtained. These steps S10 and S20 are repeated to sintered bodies 10E and 10F as shown in FIGS. 11A and 11B, 12A and 12B, and 13A and 13B. , 10G), and finally the sprue bush 10 is obtained.

In the steps shown in FIGS. 11A and 11B, the sprue 12, the main body channel 14 (the main body channel 14a and the main body channel 14b), and the flange portion channel ( 15) The laser beam is irradiated only to the portions corresponding to the flange portion 60 and the main body portion 61 without irradiating the laser beam to the portions corresponding to [the flange portion channel 15a and the flange portion channel 15b]. .

In the steps shown in FIGS. 12A and 12B, portions corresponding to the sprue 12 and the main body channel 14 shown in FIG. 18 are not irradiated with laser light, and are applied to the main body part 61. The laser beam is irradiated only to the corresponding part.

In the steps shown in FIGS. 13A and 13B, a laser beam is applied to a portion corresponding to the sprue 12 and the main body channel 14 (main body channel 14c) shown in FIG. 19. The laser beam is irradiated only to the part corresponding to the main-body part 61, without irradiating.

(E) In step S30, it is determined whether or not the number of times (the number of repetitions) of repeating the processes of step S10 and step S20 has been repeated over a predetermined number of times. If the number of repetitions is a predetermined number, the process proceeds to step S40, and if the number of repetitions is less than the predetermined number, the process returns to step S10.

(F) In step S40, the shape is adjusted by operating the processing machine 85 of FIG.

(G) In step S50, it is determined whether the sprue bush 10 is completed. When the sprue bush 10 is completed, a series of processes are complete | finished, and when the sprue bush 10 is not completed, it returns to the process of step S10.

In this way, the application and sintering of the metal powder are repeated, and whenever the number of times of application and sintering reaches a predetermined number of times, the shape of the already sintered portion is adjusted to manufacture the sprue bush 10.

As shown in Figs. 15 to 19, by using the metal light shaping complex processing method, it is possible to easily manufacture the sprue bush 10 having a complicated shape.

(Actions and effects)

According to the sprue bush 10 which concerns on 1st Embodiment of this invention, the sprue bush 10 is equipped with the flange part 60 and the main body part 61 as an integral member. That is, the flange part 60 and the main body part 61 are connected seamlessly. Moreover, the main body channel 14 is formed in the main body part 61, and the flange part channel 15 is formed in the flange part 60. As shown in FIG. Therefore, the cooling power of the cooling water flowing through the body portion 61 is directly transmitted to the molten material filled in the sprue 12, so that the cooling efficiency of the molten material filled in the sprue 12 is improved.

Moreover, the flange part channel 15 connected to the main body channel 14 and the water supply port 16a (or the drain port 16b) is formed along the sebum surface 10b (or sebum surface 10c). In addition, when the injection port part 20 makes pressure contact with the pressure contact surface 10a, since the sebum surface 10b (or sebum surface 10c) provided in the flange part 60 is press-attached to the upper mold 31, The sebum surface 10b (or sebum surface 10c) and the upper die 31 are in close contact with each other. Therefore, the coolant flowing in the main body channel 14 and the flange channel 15 is less likely to leak along the side surface of the sprue bush 10, and the coolant can be prevented from entering the runner 40 or the cavity 50. have.

Thus, the molten material filled in the sprue can be cooled efficiently and the quality deterioration of a molded article can be suppressed.

Moreover, according to the sprue bush 10 which concerns on 1st Embodiment of this invention, the main body channel 14c which has the shape of the semi-circular arc which surrounds the sprue 12 over the circumferential half is the discharge port 13 side. Is provided. That is, the volume of the main body channel 14 on the discharge port 13 side is larger than the volume of the main body channel 14 on the injection port 11 side.

Therefore, the flow rate of the cooling water which flows through the main body channel 14 increases in the discharge port 13 side where the volume of the sprue 12 is large, so that the cooling effect of the molten material filled in the sprue 12 can be enhanced. have.

Second Embodiment

The difference from 1st Embodiment is mainly demonstrated about 2nd Embodiment of this invention.

In the sprue bush 101 according to the second embodiment, the main body channel 14d and the main body channel 14e have an inclination along the inner wall of the sprue 12 having a fan shape.

As shown in FIG. 20, the sprue 12 has a fin fan shape that gradually widens from the inlet 11 toward the outlet 13. That is, as shown in FIG. 21, the extension line L ₁ of the inner wall 12a of the sprue 12 has an inclination α with respect to the straight line L _{p which} is substantially parallel to the injection direction of the molten material. . In addition, the extension line L ₂ of the inner wall 12b of the sprue 12 has an inclination β with respect to the straight line L _{p which} is substantially parallel to the injection direction of the molten material. Incidentally, the tilt α and the tilt β may be the same or different.

The main body channel 14a has an inclination along the inner wall 12a of the sprue 12. Specifically, the center line C ₁ of the main body channel 14a has an inclination α with respect to the straight line L _{p that} is substantially parallel to the injection direction of the molten material, similar to the inner wall 12a. That is, the distance between the main body channel 14a and the inner wall 12a of the sprue 12 is kept constant.

Similarly, the main body channel 14b has an inclination along the inner wall 12b of the sprue 12. Specifically, the center line C ₂ of the main body channel 14b has an inclination β with respect to the straight line L _{p which} is substantially parallel to the injection direction of the molten material, similar to the inner wall 12b. That is, the distance between the main body channel 14b and the inner wall 12b of the sprue 12 is kept constant.

(Actions and effects)

According to the sprue bush 10 which concerns on 2nd Embodiment of this invention, since the main body channel 14a has the inclination along the inner wall 12a of the sprue 12, main body channel 14a and sprue | The distance from the inner wall 12a of 12 is kept constant, and the cooling nonuniformity of the molten material filled in the sprue 12 can be reduced. Similarly, since the main body channel 14b has a slope along the inner wall 12b of the sprue 12, the distance between the main body channel 14b and the inner wall 12b of the sprue 12 is kept constant, Cooling nonuniformity of the molten material filled in the sprue 12 can be reduced.

[Third Embodiment]

Hereinafter, the 3rd embodiment of this invention is mainly demonstrated about the difference with 1st embodiment.

As shown in Fig. 22, in the sprue bush 102 according to the third embodiment of the present invention, the main body channel includes the first main body channel 14a, the fourth main body channel 14d, and the fifth main body. The channel 14e is provided. The first main body channel 14a is formed parallel to the central axis of the sprue. One end of the first main body channel 14a is connected to the water supply port via a flange part channel, and the other end of the first main body channel 14a has a cross-sectional shape obtained by orthogonal to the flow direction of the molten material of the sprue. It is connected to the 4th main body channel 14d formed so that the sprue | circle periphery may be formed in the large diameter side of the sprue defined by the area | region of a substantially C-shaped cross section containing the circle | round | yen of a cross section and the arc of a concentric circle. One end of the fifth body channel 14e is formed to be connected to the drain port 16b via the flange portion channel 15b.

In 1st Embodiment mentioned above, the 3rd main body channel 14c which connects the 1st main body channel 14a and the 2nd main body channel 14b is the semi-circular arc type which surrounds the sprue 12 over the circumferential half. It has a shape. On the other hand, in 3rd Embodiment, the 4th main body channel 14d which connects the 1st main body channel 14a and the 5th main body channel 14e is the substantially surrounding the sprue 12 over the whole perimeter. It has an arc-shaped shape.

As shown in FIGS. 23 and 24, the fifth body channel 14e has a spiral shape along the sprue 12. In addition, the 4th main body channel 14d has a substantially arc-shaped shape which encloses the sprue 12 over substantially the entire perimeter.

(Actions and effects)

According to the sprue bush 10 which concerns on 3rd Embodiment of this invention, the 4th main body channel 14d which connects the 1st main body channel 14a and the 5th main body channel 14e is the sprue 12. It has an approximately arc-shaped shape that encloses over approximately its entire circumference. In addition, 14 d of 4th main body water paths are provided in the discharge port 13 side. That is, the volume of the 4th main body channel 14d provided in the discharge port 13 side is large compared with 1st Embodiment mentioned above.

Therefore, the flow rate of the cooling water increases on the discharge port 13 side with a larger volume of the sprue 12 than in the above-described first embodiment, thereby further enhancing the cooling effect of the molten material filled in the sprue 12. Can be.

[Other Embodiments]

Although this invention was demonstrated with reference to embodiment, the description and drawing which form a part of this indication are not to be understood as limiting this invention. Various alternative embodiments, examples and operational techniques will become apparent to those skilled in the art from the disclosure herein.

For example, in the first to third embodiments, the water supply port 16a is formed in the sebum surface 10b, and the drain port 16b is formed in the sebum surface 10c, but is not limited thereto. . Specifically, as long as the water supply port 16a and the drain port 16b are parts other than the pressurized contact surface 10a, you may be provided in any part.

In the first to third embodiments, the main body channel 14 and the flange part channel 15 have a cylindrical shape, but are not limited thereto. Specifically, the shape of the main body channel 14 may be appropriately changed in accordance with the cooling efficiency of the molten material filled in the sprue 12. In addition, the shape of the flange part channel 15 may be changed suitably according to the water supply efficiency of cooling water, and the drainage efficiency of cooling water.

In 1st Embodiment-3rd Embodiment, although only one main body channel 14c which connects the main body channel 14a and the main body channel 14b is formed in the discharge port 13 side, it is not limited to this. Specifically, the number of the main body channel 14c may be plural, and the position of the main body channel 14c may be set to the injection port 11 side than the first embodiment to the third embodiment.

In the first to third embodiments, the support member for supporting the sprue bush 10 is the upper die 31, but is not limited thereto. Specifically, the support member which supports the sprue bush 10 may be provided separately from the upper mold 31.

In the first to third embodiments, the sprue bushes 10, 101, and 102 are manufactured using a metal light shaping composite processing method, but are not limited thereto. Specifically, the sprue 12, the main body channel 14, the flange channel 15, the injection port 11, the water supply port by cutting the metal mass for constituting the sprue bushes 10, 101, and 102 You may form 16a and the drain port 16b by cutting. Further, after placing the wax corresponding to the sprue 12, the main body channel 14, the flange channel 15, the inlet 11, the water supply port 16a and the drain port 16b in the casting furnace, The melted beeswax after the material for constituting the sprue bush 10 is introduced into the casting furnace, whereby the sprue 12, the main body channel 14, the flange channel 15, the inlet 11, and the water inlet You may form 16a and the drain port 16b.

 In the first to third embodiments, the water supply port 16a and the drain port 16b were formed. In this case, as long as the flow direction of the cooling water is maintained to one side, the cooling water is not only injected from the water supply port 16a and discharged from the drain port 16b but also injected from the drain port 16b and discharged from the water supply port 16a. none.

This application is accompanied by a priority claim based on Japanese Patent Application, which is previously filed by the same applicant, that is, Japanese Patent Application No. 2006-262536 (filed September 27, 2006), the contents of which are herein incorporated by reference. It shall be included in.

According to the present invention, there is provided a sprue bush and a method for producing the sputter bush which can efficiently cool the molten material filled in the sprue and suppress the deterioration of the quality of the molded article.

Claims (14)

A sprue having an injection hole formed at one end thereof so as to be connectable to an injection hole of an injection molding machine, and having a sprue having an outlet hole formed at the other end so as to be connectable to a cavity of the mold when attached to the mold at the other end, and an area excluding the sprue Sprue bush body of cylindrical shape in which body channel was embedded in part of A flange portion which protrudes from the injection port side end of the sprue bush main body, is connected to the sprue bush main body, and has a flange part channel connected to the outside of the main body channel to the outside; Sprue bushes comprising a. The sprue bush according to claim 1, wherein the flange portion is provided with a water supply port and a drain port continuous to the flange portion channel in the sebum surface when the flange portion is attached to the mold. The sprue bush according to claim 1, wherein the sprue has a hollow, substantially conical shape that increases in diameter from one end in the flow direction of the molten material toward the other end. The sprue bush according to claim 1, wherein the main body channel is formed to surround the sprue at the outlet port side of the sprue. The cross-sectional shape obtained at right angles to the flow direction of the molten material of the sprue is defined as an area of approximately C-shaped cross section including an arc of circles and concentric circles of the sprue cross section. And a sprue bush formed on the outlet side of the sprue bush body so as to surround the sprue circumference. The sprue bush according to claim 1, wherein a volume of the main body channel on the mold side is larger than a volume of the main body channel on the injection port side. A hollow, substantially conical sprue, the diameter of which is increased from one end in the flow direction of the molten material toward the other end, is provided inside the main body, and an injection hole is formed in the small diameter side end of the sprue so as to be connected to the injection port of the injection molding machine. And a discharge port is formed at the other end of the large diameter side of the sprue so as to be connectable to the cavity of the mold when attached to the mold. A cylindrical sprue bush body in which the body channel is embedded so as to surround the surroundings, Protruding from the injection port side end of the sprue bush main body and connected to the sprue bush main body, and a flange channel is embedded so as to pass outwardly in succession to the main body channel, and is mounted on the sebum surface when attached to the mold. Flange section provided with water supply and drain holes continuous to the flange channel Sprue bushes comprising a. The said main body channel is provided with the 1st main body channel, the 2nd main body channel, and the 3rd main body channel, The said 1st main body channel and the said 2nd main channel have flows of the molten material of the sprue. It is formed parallel to the central axis of the direction, one end of the first body channel and the second body channel, respectively, is connected to the water supply port or the drain through the flange portion channel, the first body channel and the first The other ends of the two main body channels are connected to each other by a third main body channel formed to surround the sprue at the outlet side of the sprue. The sprue bush according to claim 8, wherein the first main body channel and the second main body channel have a slope along an inner wall of the sprue. The said main body channel is provided with a 1st main body channel, a 4th main body channel, and a 5th main body channel, The 1st main body channel is formed parallel to the central axis of the said sprue, The said 1st main body One end of the water channel is connected to the water supply port via the flange portion channel, and the other end of the first main body channel has a cross-sectional shape obtained at right angles to the flow direction of the molten material of the sprue. A large diameter side of the sprue, which is defined as an area of approximately C-shaped cross section including an arc of concentric circles, connected to a fourth body channel formed to surround the sprue, and one end of the fifth body channel is A sprue bush, characterized in that it is formed to be connected to the drain through a flange channel.  Applying a metal powder; A hollow, substantially conical sprue, the diameter of which is increased from one end in the flow direction of the molten material toward the other end, is provided inside the main body, and an injection hole is formed in the small diameter side end of the sprue so as to be connected to the injection port of the injection molding machine. And a discharge port is formed at the other end of the large diameter side of the sprue so as to be connectable to the cavity of the mold when attached to the mold, and the sprue at the discharge port side of the sprue in a part of the area excluding the sprue. A cylindrical sprue bush body in which the body channel is embedded so as to surround the surroundings, and Protruding from the injection port side end of the sprue bush main body and connected to the sprue bush main body, and a flange channel is embedded so as to pass outwardly in succession to the main body channel, and is mounted on the sebum surface when attached to the mold. Flange section provided with water supply and drain holes continuous to the flange channel Based on the pattern of the cross-sectional shape obtained orthogonally to the flow direction of the molten material of the sprue bush including a, except for the parts corresponding to the sprue, the main body channel, the flange channel, the water supply port, the drain Heat treating the metal powder by laser light irradiation to further sinter and stack to form a three-dimensional shape; and Process of performing cutting process on the three-dimensional shape Method for producing a sprue bush comprising a. The said main body channel is provided with the 1st main body channel, the 2nd main body channel, and the 3rd main body channel, The said 1st main body channel and the said 2nd main channel have flows of the molten material of the sprue. It is formed parallel to the central axis of the direction, one end of the first body channel and the second body channel, respectively, is connected to the water supply port or the drain through the flange portion channel, the first body channel and the first 2 The other end of the main body channel is connected to each other by a third main body channel formed to surround the sprue at the outlet side of the sprue. The method of manufacturing a sprue bush according to claim 11, wherein the first main body channel and the second main body channel have a slope along an inner wall of the sprue. The said main body channel is provided with a 1st main body channel, a 4th main body channel, and a 5th main body channel, A 1st main body channel is formed parallel to the central axis of the said sprue, The said 1st main body One end of the water channel is connected to the water supply port via the flange portion channel, and the other end of the first main body channel has a cross-sectional shape obtained by orthogonal to the flow direction of the molten material of the sprue. Connected to a fourth body channel formed so as to surround the sprue at a large diameter side of the sprue, which is defined as an area of approximately C-shaped cross section including an arc of concentric circles, and one end of the fifth body channel is The sprue bush manufacturing method characterized in that it is formed to be connected to the drain through the flange channel.

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