Viscous body supply nozzle and resin molding manufacturing method

Abstract

To prevent a viscous body from being leaked to an unintended place.SOLUTION: A viscous body supply nozzle 12 is inserted to a through hole 52 formed in a resin molding 50 as a target, and supplies a viscous body to the through hole 52. The viscous body supply nozzle 12 includes a first supply surface 18 which is composed of an outer peripheral surface of a first region R1 partitioned vertical to an axial direction and has a first viscous body discharge port 20, and a second supply surface 22 which is adjacent to the first region R1, is composed of an outer peripheral surface of a second region R2 partitioned vertical to the axial direction, has the same area as the first supply surface 18, and has a second viscous body discharge port 24. The total area of the first viscous body discharge port 20 is smaller than the total area of the second viscous body discharge port 24.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a viscous material supply nozzle and a method for manufacturing a resin molded article. [Background technology]

[0002] BACKGROUND ART There is a device that applies a viscous material such as grease to the inner hole of a cylindrical object by inserting a nozzle into the inner hole and discharging the viscous material from the nozzle (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 52-96357 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned device, the viscous material supplied to the bore may leak out of the bore.

[0005] The present invention has been proposed in consideration of the above-mentioned problems associated with conventional technology in order to optimally solve these problems, and aims to provide a viscous material supply nozzle and a method for manufacturing a resin molded body that can prevent the viscous material from leaking to unintended locations such as outside the through hole. [Means for solving the problem]

[0006] A first aspect of the viscous material supply nozzle according to the present invention is as follows: A viscous material supply nozzle that is inserted into a through hole formed in an object and supplies a viscous material to the through hole, a first supply surface including an outer peripheral surface of a first region defined perpendicular to the axial direction and having a first viscous material discharge port; a second supply surface, which is adjacent to the first region and is made up of an outer peripheral surface of a second region defined perpendicular to the axial direction, has the same area as the first supply surface, and has a second viscous material discharge port; The total area of ​​the first viscous material discharge port is smaller than the total area of ​​the second viscous material discharge port.

[0007] A second aspect of the viscous material supply nozzle according to the present invention is the viscous material supply nozzle according to the first aspect of the present invention, The center of the first viscous material discharge port and the center of the second viscous material discharge port may not be on the same line extending in the axial direction.

[0008] A third aspect of the viscous material supply nozzle according to the present invention is the viscous material supply nozzle according to the first or second aspect, a supply passage connected to the first viscous material discharge port and the second viscous material discharge port is provided inside the viscous material supply nozzle; The volume of the supply channel in the first region may be smaller than the volume of the supply channel in the second region.

[0009] A first aspect of the method for producing a resin molded product according to the present invention is A method for manufacturing a resin molded article having a through hole formed therein, comprising: The method further includes a coating step of inserting the viscous material supply nozzle according to any one of the first, second and third aspects to coat the viscous material into the through-hole.

[0010] A second aspect of the method for producing a resin molded body according to the present invention is the same as the first aspect of the method for producing a resin molded body, The through hole is a coating portion having an inner diameter smaller than the outer diameter of the outer peripheral surfaces of the first region and the second region of the viscous material supply nozzle; The nozzle may further include a non-application portion having an inner diameter larger than the outer diameter of the outer peripheral surfaces of the first region and the second region of the viscous material supply nozzle. [Effects of the Invention]

[0011] The viscous material supply nozzle according to the present invention can prevent the viscous material from leaking to unintended locations such as outside the through-hole. According to the method for manufacturing a resin molded body of the present invention, it is possible to prevent the viscous material from leaking to unintended locations such as outside the through-hole. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing a viscous material supplying device including a viscous material supplying nozzle according to an embodiment of the present invention, showing a state before a resin molded body is attached to the viscous material supplying nozzle. [Figure 2] 1 is a schematic diagram showing a viscous material supplying device including a viscous material supplying nozzle according to an embodiment, showing a state in which a resin molded body is attached to the viscous material supplying nozzle. [Figure 3] FIG. 2 is a side view showing a main part of the viscous material supply nozzle of the embodiment, showing a state before a resin molded body is attached to the viscous material supply nozzle. [Figure 4] 1 is a side view showing a main part of a viscous material supply nozzle according to an embodiment, showing a state in which a resin molded body is attached to the viscous material supply nozzle. FIG. [Figure 5] FIG. 2 is a longitudinal sectional view showing a main part of a viscous material supply nozzle according to an embodiment. [Figure 6] FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. [Figure 7] FIG. 5 is a cross-sectional view taken along line BB in FIG. 4. [Figure 8] FIG. 5 is a cross-sectional view taken along line CC in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, the viscous material supply nozzle and the method for manufacturing a resin molded product according to the present invention will be described below by way of preferred examples with reference to the accompanying drawings. Note that the embodiments and drawings described below are intended to exemplify some of the embodiments of the present invention, and are not intended to limit the scope of the present invention to these configurations, and can be modified as appropriate within the scope of the gist of the present invention. [Example]

[0014] 1 and 2, a viscous material supplying device 10 according to the embodiment includes a viscous material supply nozzle 12 for supplying viscous material to a through-hole 52 formed in a resin molded body 50 as an object, a tank 14 in which the viscous material is stored, and a pump 16 for sending the viscous material from the tank 14 to the viscous material supply nozzle 12. The viscous material may be a semi-solid or paste-like material having fluidity, such as a lubricant such as grease or lubricating oil, or an adhesive such as a synthetic resin, glue, or rubber. The viscous material in the embodiment is grease.

[0015] The resin molded body 50 is cylindrical with a through hole 52 and may be made of a foamed or non-foamed resin. The resin molded body 50 of the embodiment is an example of a resilient shock absorbing material also called a bump stopper that is attached to the suspension of a vehicle. The resin molded body 50 as a bump stopper is placed on the suspension with the shaft of a shock absorber passing through the through hole 52, and it is required that grease as a viscous material be applied in advance to a predetermined area of ​​the through hole 52.

[0016] As shown in FIG. 3 , the through hole 52 is divided into a coating portion 54 to which the viscous material is applied and a non-coating portion 56 to which the viscous material is not applied, in a direction perpendicular to the penetration direction of the through hole 52. In the orientation of the resin molded body 50 in which the penetration direction of the through hole 52 is vertical, the coating portion 54 is located closer to the upper opening of the through hole 52, and the non-coating portion 56 is located below the coating portion 54. In the resin molded body 50, the inner diameter D1 of the coating portion 54 in the through hole 52 is smaller than the inner diameter D2 of the non-coating portion 56 in the through hole 52. In addition, a groove portion 58 recessed in an arc shape is formed around the entire circumference of the coating portion 54. In the coating portion 54, multiple groove portions 58 (three in this embodiment) are arranged spaced apart in the penetration direction of the through hole 52. Note that in this embodiment, the multiple groove portions 58 are the same size and are arranged at regular intervals. The application target portion 54 is disposed from one opening of the through-hole 52 or the vicinity of one opening over a partial area in the penetration direction, and the viscous material is applied to the application target portion 54 including the groove portion 58.

[0017] As shown in Fig. 2, the viscous material supply nozzle 12 is inserted into a through-hole 52 in a resin molded body 50 to supply viscous material to the through-hole 52. The outer shape of the viscous material supply nozzle 12 is formed to match the shape of the through-hole 52 in the resin molded body 50, and the viscous material supply nozzle 12 in the embodiment is cylindrical to match the circular opening shape of the through-hole 52. The axial direction of the viscous material supply nozzle 12 is the longitudinal direction of the elongated cylindrical viscous material supply nozzle 12 in the embodiment, and corresponds to the insertion / removal direction in which the viscous material supply nozzle 12 is inserted into or removed from the through-hole 52 in the resin molded body 50. Furthermore, the viscous material supply nozzle 12 in the embodiment is positioned with its tip facing upward and its axial direction extending vertically, and the direction perpendicular to the axial direction corresponds to the horizontal direction.

[0018] 3 and 4, the viscous material supply nozzle 12 has a plurality of supply surfaces 18, 22, and 26, each of which is formed by the outer peripheral surface of imaginary regions R1, R2, and R3 defined perpendicular to the axial direction of the viscous material supply nozzle 12. The supply surfaces 18, 22, and 26 are provided with viscous material outlets 20, 24, and 28, respectively. More specifically, the viscous material supply nozzle 12 has a first supply surface 18, which is formed by the outer peripheral surface of a first region R1 defined perpendicular to the axial direction of the viscous material supply nozzle 12 and has a first viscous material outlet 20. The viscous material supply nozzle 12 also has a second supply surface 22, which is formed by the outer peripheral surface of a second region R2 defined perpendicular to the axial direction and adjacent to the first region R1 and has a second viscous material outlet 24. The viscous material supply nozzle 12 also has a third supply surface 26, which is formed by the outer peripheral surface of a third region R3 defined perpendicular to the axial direction and adjacent to the second region R2 and has a third viscous material outlet 28. Here, the first supply surface 18, the second supply surface 22, and the third supply surface 26 have the same area.

[0019] 3 , in the example, the outer diameter W of the outer peripheral surface of the first region R1 (first supply surface 18), the outer diameter W of the outer peripheral surface of the second region R2 (second supply surface 22), and the outer diameter W of the outer peripheral surface of the third region R3 (third supply surface 26) are the same. Furthermore, in the viscous material supply nozzle 12 of the example, the outer diameter W of the outer peripheral surface is the same over the range that faces the inner surface of the through hole 52 when inserted into the through hole 52. The outer diameter W of the outer peripheral surface of the first region R1 (first supply surface 18), the outer diameter W of the outer peripheral surface of the second region R2 (second supply surface 22), and the outer diameter W of the outer peripheral surface of the third region R3 (third supply surface 26) are larger than the inner diameter D1 of the application target portion 54 in the through hole 52 and smaller than the inner diameter D2 of the non-application portion 56 in the through hole 52. That is, the inner diameter D1 of the application target portion 54 is smaller than the outer diameter W of the outer peripheral surface of the first region R1 (first supply surface 18), the outer diameter W of the outer peripheral surface of the second region R2 (second supply surface 22), and the outer diameter W of the outer peripheral surface of the third region R3 (third supply surface 26). Also, the inner diameter D2 of the non-application portion 56 is larger than the outer diameter W of the outer peripheral surface of the first region R1 (first supply surface 18), the outer diameter W of the outer peripheral surface of the second region R2 (second supply surface 22), and the outer diameter W of the outer peripheral surface of the third region R3 (third supply surface 26).

[0020] As shown in FIG. 3 , the outer peripheral surfaces of the first region R1, the second region R2, and the third region R3 of the viscous material supply nozzle 12 (the first supply surface 18, the second supply surface 22, and the third supply surface 26) are portions that face the application target portion 54 when the viscous material supply nozzle 12 is inserted into the through-hole 52 of the resin molded body 50. In the embodiment, the first supply surface 18, the second supply surface 22, and the third supply surface 26 are disposed at the axial tip side of the viscous material supply nozzle 12. In the viscous material supply nozzle 12, the first supply surface 18 (the outer peripheral surface of the first region R1) is disposed at the axial tip side of the viscous material supply nozzle 12 among the multiple supply surfaces 18, 22, and 26 (the multiple regions R1, R2, and R3). Therefore, the first viscous material discharge port 20 of the first supply surface 18 is disposed closest to the upper opening of the through-hole 52 of the resin molded body 50. The second supply surface 22 (the outer peripheral surface of the second region R2) is adjacent to the first supply surface 18 (the outer peripheral surface of the first region R1) on the axial root side of the viscous material supply nozzle 12. The third supply surface 26 (the outer peripheral surface of the third region R3) is adjacent to the second supply surface 22 (the outer peripheral surface of the second region R2) on the axial root side of the viscous material supply nozzle 12.

[0021] The viscous material discharge ports 20, 24, and 28 are through holes for discharging the viscous material from the inside of the viscous material supply nozzle 12 to the outside, and are open on the outer circumferential surface of the viscous material supply nozzle 12. In the embodiment, the viscous material discharge ports 20, 24, and 28 are all circular, and the first viscous material discharge port 20, the second viscous material discharge port 24, and the third viscous material discharge port 28 are the same size. Here, the axial size of the viscous material discharge ports 20, 24, and 28 is preferably equal to or less than the axial width of the groove portion 58 in the resin molded body 50. As shown in FIG. 6, the first supply surface 18 has a plurality of first viscous material discharge ports 20 (six in the embodiment). The plurality of first viscous material discharge ports 20 are arranged so that the axial centers of the first viscous material discharge ports 20 are aligned on the same circumference. As shown in FIG. 7, the second supply surface 22 has a plurality of second viscous material discharge ports 24 (twelve in the embodiment). The plurality of second viscous material discharge ports 24 are arranged so that the axial centers of the second viscous material discharge ports 24 are aligned on the same circumference. As shown in Fig. 8, the third supply surface 26 has a plurality (12 in this embodiment) of third viscous material discharge ports 28. The plurality of third viscous material discharge ports 28 are arranged so that the axial centers of the third viscous material discharge ports 28 are aligned on the same circumference. When the viscous material supply nozzle 12 is inserted into the through-hole 52 of the resin molded body 50, the first viscous material discharge port 20, the second viscous material discharge port 24, and the third viscous material discharge port 28 each face a different groove portion 58.

[0022] The total area of ​​the first viscous body outlets 20 opening on the first supply surface 18 is smaller than the total area of ​​the second viscous body outlets 24 opening on the second supply surface 22 adjacent to the first supply surface 18. In addition, the total area of ​​the first viscous body outlets 20 opening on the first supply surface 18 is smaller than the total area of ​​the third viscous body outlets 28 opening on the third supply surface 26 adjacent to the second supply surface 22. Furthermore, the total area of ​​the second viscous body outlets 24 opening on the second supply surface 22 is the same as the total area of ​​the third viscous body outlets 28 opening on the third supply surface 26 adjacent to the second supply surface 22. In the embodiment, the total area of ​​the first viscous body outlets 20 is the sum of all the opening areas of the multiple first viscous body outlets 20 provided on the first supply surface 18, and the total area of ​​the second viscous body outlets 24 is the sum of all the opening areas of the multiple second viscous body outlets 24 provided on the second supply surface 22. Similarly, the total area of ​​the third viscous material discharge ports 28 is the sum of the opening areas of the plurality of third viscous material discharge ports 28 provided in the third supply surface 26 .

[0023] In the embodiment, since the opening sizes of the first viscous body outlet 20 and the second viscous body outlet 24 are the same, by making the number of first viscous body outlets 20 smaller than the number of second viscous body outlets 24, the total area of ​​the first viscous body outlet 20 is smaller than the total area of ​​the second viscous body outlet 24. Also, since the opening sizes of the first viscous body outlet 20 and the third viscous body outlet 28 are the same, by making the number of first viscous body outlets 20 smaller than the number of third viscous body outlets 28, the total area of ​​the first viscous body outlet 20 is smaller than the total area of ​​the third viscous body outlet 28. Furthermore, since the opening sizes of the second viscous body outlet 24 and the third viscous body outlet 28 are the same, by making the number of second viscous body outlets 24 and the number of third viscous body outlets 28 the same, the total area of ​​the second viscous body outlet 24 and the total area of ​​the third viscous body outlet 28 are the same.

[0024] 3 and 4, the first viscous material outlet 20 and the second viscous material outlet 24 are arranged in a positional relationship such that the center of the first viscous material outlet 20 and the center of the second viscous material outlet 24 are not on the same line extending in the axial direction. Furthermore, the first viscous material outlet 20 and the third viscous material outlet 28 are arranged in a positional relationship such that the center of the first viscous material outlet 20 and the center of the third viscous material outlet 28 are not on the same line extending in the axial direction. Furthermore, the second viscous material outlet 24 and the third viscous material outlet 28 are arranged in a positional relationship such that the center of the second viscous material outlet 24 and the center of the third viscous material outlet 28 are not on the same line extending in the axial direction. In this way, the centers of the first viscous material outlet 20, the second viscous material outlet 24, and the third viscous material outlet 28 are shifted from each other in the circumferential direction so as not to be on the same imaginary line extending in the axial direction of the viscous material supply nozzle 12. In other words, the viscous material discharge ports 20, 24, 28 provided on the supply surfaces 18, 22, 26 adjacent to each other in the axial direction are arranged with a phase shift from each other in the circumferential direction.

[0025] As shown in FIG. 5, the viscous material supply nozzle 12 includes a supply path 30 therein through which the viscous material sent from the tank 14 by the pump 16 passes. The supply path 30 is formed to extend axially inside the viscous material supply nozzle 12 and is connected to a first viscous material outlet 20, a second viscous material outlet 24, and a third viscous material outlet 28 provided on the outer circumferential surface of the viscous material supply nozzle 12. The volume of the supply path 30 in the first region R1 is smaller than the volume of the supply path 30 in the second region R2. The volume of the supply path 30 in the second region R2 is also smaller than the volume of the supply path 30 in the third region R3. Thus, in the first region R1, second region R2, and third region R3 in which the viscous material outlets 20, 24, and 28 are provided, the volume of the supply path 30 decreases from the base side to the tip side of the viscous material supply nozzle 12.

[0026] 5, the viscous material supply nozzle 12 includes guide portions 32 arranged in the supply path 30 of the first region R1, the second region R2, and the third region R3. The guide portions 32 are conical in shape, with an outer diameter increasing from the base to the tip of the viscous material supply nozzle 12. The distance S1 between the first viscous material discharge port 20 and the guide portion 32 in the supply path 30 of the first region R1 is narrower than the distance S2 between the second viscous material discharge port 24 and the guide portion 32 in the supply path 30 of the second region R2, thereby making the volume of the supply path 30 in the first region R1 smaller than the volume of the supply path 30 in the second region R2. Similarly, by making the distance S2 between the second viscous discharge outlet 24 and the guide portion 32 in the supply path 30 in the second region R2 narrower than the distance S3 between the third viscous discharge outlet 28 and the guide portion 32 in the supply path 30 in the third region R3, the volume of the supply path 30 in the second region R2 is made smaller than the volume of the supply path 30 in the third region R3.

[0027] Next, an example of a method for manufacturing a resin molded body 50 using the aforementioned viscous material supply device 10 will be described. First, a molding process is performed to form a resin molded body 50 having a through hole 52 by a known molding process such as molding. Next, a coating process is performed in which the through hole 52 is fitted into a viscous material supply nozzle 12, the resin molded body 50 is attached to the viscous material supply nozzle 12, and the viscous material is applied to the application portion 54 of the through hole 52. Specifically, the resin molded body 50 is moved by a transfer means (not shown), and the viscous material supply nozzle 12 is inserted from the non-application portion 56 side of the through hole 52 in the resin molded body 50. Then, the resin molded body 50 is moved from the axial tip side to the base side of the viscous material supply nozzle 12, so that the outer peripheral surfaces of the first region R1, second region R2, and third region R3 of the viscous material supply nozzle 12 are fitted into the application portion 54 of the through hole 52 (see FIG. 3).

[0028] 4, when the resin molded body 50 is attached to the viscous material supply nozzle 12, the first supply surface 18 faces the groove portion 58 closest to the upper opening of the through-hole 52, and the first viscous material discharge port 20 faces this groove portion 58. Furthermore, the second supply surface 22 faces the groove portion 58 facing the first supply surface 18 and the groove portion 58 adjacent to the axial root side, and the second viscous material discharge port 24 faces this groove portion 58. Furthermore, the third supply surface 26 faces the groove portion 58 facing the second supply surface 22 and the groove portion 58 adjacent to the axial root side, and the third viscous material discharge port 28 faces this groove portion 58.

[0029] In the application process, the pump 16 is driven to pump the viscous material from the tank 14 to the viscous material supply nozzle 12, causing the viscous material to flow through the supply path 30 of the viscous material supply nozzle 12 from the base to the tip, and the viscous material is discharged from each of the viscous material discharge ports 20, 24, and 28 of the supply surfaces 18, 22, and 26 into the opposing grooves 58 (see FIGS. 6 to 8). The viscous material supplied to each groove 58 spreads along the grooves 58 and is applied to the application target portions 54 of the through holes 52. The resin molded body 50 is moved from the axial base to the tip of the viscous material supply nozzle 12 by a transfer means (not shown), and the resin molded body 50 is removed from the viscous material supply nozzle 12, thereby obtaining a resin molded body 50 having the viscous material applied to the application target portions 54 of the through holes 52.

[0030] Assuming that the viscous material supply nozzle 12 is divided perpendicularly to the axial direction into adjacent first and second regions R1 and R2 with the same area, viscous material outlets 20 and 24 are present on supply surfaces 18 and 22, which are formed by the outer peripheral surfaces of the respective regions R1 and R2. In the viscous material supply nozzle 12, the total area of ​​the first viscous material outlets 20 on the first supply surface 18 is smaller than the total area of ​​the second viscous material outlets 24 on the second supply surface 22, which is adjacent to the first supply surface 18 in the axial direction. Therefore, the amount of viscous material supplied to a position facing the first supply surface 18 on the application target portion 54 of the through-hole 52 can be made smaller than the amount of viscous material supplied to a position facing the second supply surface 22 on the application target portion 54 of the through-hole 52. In this way, by supplying a relatively small amount of viscous material from the first supply surface 18, leakage of viscous material from the first supply surface 18 to the axially opposite side of the second supply surface 22 can be prevented. In particular, the first supply surface 18 supplies the viscous material to a position among the multiple supply surfaces 18, 22, and 26 that is closest to the opening of the through-hole 52, and therefore, by supplying a relatively small amount of viscous material from the first supply surface 18, it is possible to prevent the viscous material from leaking from the opening of the through-hole 52. Therefore, according to the viscous material supply nozzle 12 and the method for manufacturing the resin molded body 50 using the viscous material supply nozzle 12, it is possible to prevent the viscous material from leaking to unintended locations, such as outside the through-hole 52.

[0031] The viscous material supply nozzle 12 is provided with a third supply surface 26 adjacent to the second supply surface 22 in the axial direction, so even if the amount of viscous material supplied from the first supply surface 18 is small, a sufficient amount of viscous material can be supplied from the third supply surface 26 to apply to the coated portion 54. Furthermore, by supplying the viscous material separately from each of the multiple supply surfaces 18, 22, and 26 perpendicular to the axial direction, it is easy to control the viscous material for each supply surface 18, 22, and 26, and unevenness of the viscous material on the coated portion 54 can be reduced.

[0032] In the viscous material supply nozzle 12, the first viscous material outlet 20 and the second viscous material outlet 24 are arranged to be offset from each other in the circumferential direction so that the centers of the first viscous material outlet 20 and the second viscous material outlet 24 are not on the same line extending in the axial direction. This makes it possible to prevent the viscous material discharged from the first viscous material outlet 20 and the viscous material discharged from the second viscous material outlet 24 from overlapping excessively on the same line extending in the axial direction, thereby preventing the viscous material from leaking to unintended locations such as outside the through-hole 52. In particular, because the centers of the first viscous material outlet 20, the second viscous material outlet 24, and the third viscous material outlet 28 are not on the same line extending in the axial direction, the viscous material is discharged in a dispersed manner in the circumferential direction of the application target portion 54, making it less likely for the viscous material to leak to unintended locations such as outside the through-hole 52.

[0033] In the viscous material supply nozzle 12, the volume of the supply path 30 in the first region R1 is made smaller than the volume of the supply path 30 in the second region R2 axially adjacent to the first region R1, thereby increasing the pressure of the viscous material flowing through the supply path 30 in the first region R1. Even when the viscous material flows from the second region R2 side to the first region R1 in the supply path 30, the pressure of the viscous material can be maintained in the first region R1, allowing the viscous material to be smoothly discharged from the first viscous material discharge port 20 in the first supply surface 18 formed by the outer peripheral surface of the first region R1. Similarly, in the viscous material supply nozzle 12, the volume of the supply path 30 in the second region R2 is made smaller than the volume of the supply path 30 in the third region R3 axially adjacent to the second region R2, thereby increasing the pressure of the viscous material flowing through the supply path 30 in the second region R2. Even when the viscous material flows from the third region R3 to the second region R2 in the supply path 30, the pressure of the viscous material can be maintained in the second region R2, and the viscous material can be smoothly discharged from the second viscous material discharge port 24 of the second supply surface 22, which is formed on the outer peripheral surface of the second region R2.

[0034] The through-hole 52 has a coated portion 54 with an inner diameter D1 smaller than the outer diameter W of the outer peripheral surfaces of the first region R1 and the second region R2 of the viscous material supply nozzle 12, and a non-coated portion 56 with an inner diameter D2 larger than the outer diameter W of the outer peripheral surfaces of the first region R1 and the second region R2 of the viscous material supply nozzle 12. Because the inner diameter D1 of the coated portion 54 is smaller than the outer diameter W of the supply surfaces 18, 22 of the viscous material supply nozzle 12, the supply surfaces 18, 22 of the viscous material supply nozzle 12 fit into the coated portion 54, thereby stabilizing the supply of the viscous material to the coated portion 54. Furthermore, since the inner diameter D1 of the application target portion 54 is smaller than the outer diameter W of the outer peripheral surfaces of the first region R1 and the second region R2 of the viscous material supply nozzle 12, even if viscous material remains on the supply surfaces 18, 22, when the viscous material supply nozzle 12 is inserted into the through hole 52 of the resin molded body 50, the application target portion 54 can push the viscous material into the non-application portion 56 of the through hole 52. Therefore, the viscous material does not overflow from the upper opening of the through hole 52. Furthermore, when the resin molded body 50 is removed from the viscous material supply nozzle 12, the supply surfaces 18, 22 move relatively to the side opposite the upper opening of the through hole 52, so the viscous material can be spread by the supply surfaces 18, 22 to the side opposite the upper opening.

[0035] (Example of change) The present invention is not limited to the above-mentioned matters, but may be, for example, as follows: Note that the present invention is not limited to the specific descriptions of the embodiment and the following modified examples. (1) In the embodiment, the total area of ​​the first viscous material outlets is made smaller than the total area of ​​the second viscous material outlets by making the number of first viscous material outlets smaller than the number of second viscous material outlets, but this is not limiting. For example, the opening size of the first viscous material outlets is made smaller than the opening size of the second viscous material outlets to make the total area of ​​the first viscous material outlets smaller than the total area of ​​the second viscous material outlets, or both the opening size of the viscous material outlets and the number of viscous material outlets are changed, or the supply path of the first region is made more difficult for the viscous material to flow through than the supply path of the second region, or other configurations may be used to make the amount of viscous material supplied from the first supply surface smaller than the amount of viscous material supplied from the second supply surface. (2) In the viscous material supply nozzle, the total area of ​​the second viscous material outlets in the second supply surface and the total area of ​​the third viscous material outlets in the third supply surface axially adjacent to the second supply surface may be the same or different. (3) In the examples, an arrangement of the viscous discharge port divided into three regions is given, but an arrangement of the viscous discharge port divided into two regions or an arrangement of the viscous discharge port divided into four or more regions is also possible. (4) In the embodiment, the centers of the viscous material outlets in each region are arranged on the same circumference, but this is not limited to this, and the centers of the viscous material outlets within a region defined perpendicular to the axial direction do not have to be aligned on the same circumference. [Explanation of symbols]

[0036] 12 viscous material supply nozzle, 18 first supply surface, 20 first viscous material discharge port, 22 second supply surface, 24 second viscous material discharge port, 50 resin molded body (target object), 52 Through hole, R1 1st region, R2 2nd region

Claims

1. A viscous material supply nozzle that is inserted into a through hole formed in an object and supplies a viscous material to the through hole, a first supply surface including an outer peripheral surface of a first region defined perpendicular to the axial direction and having a first viscous material discharge port; a second supply surface, which is adjacent to the first region and is made up of an outer peripheral surface of a second region defined perpendicular to the axial direction, has the same area as the first supply surface, and has a second viscous material discharge port; A viscous material supply nozzle, wherein the total area of ​​the first viscous material outlet is smaller than the total area of ​​the second viscous material outlet.

2. The viscous material supply nozzle according to claim 1 , wherein the center of the first viscous material discharge port and the center of the second viscous material discharge port are not on the same line extending in the axial direction.

3. a supply passage connected to the first viscous material discharge port and the second viscous material discharge port is provided inside the viscous material supply nozzle; 2. The viscous material supply nozzle according to claim 1, wherein the volume of the supply passage in the first region is smaller than the volume of the supply passage in the second region.

4. A method for manufacturing a resin molded article having a through hole formed therein, comprising: A method for manufacturing a resin molded body, comprising a coating step of inserting the viscous material supply nozzle according to claim 1 into the through-hole to apply the viscous material to the through-hole.

5. The through hole is a coating portion having an inner diameter smaller than the outer diameter of the outer peripheral surfaces of the first region and the second region of the viscous material supply nozzle; The method for manufacturing a resin molded body according to claim 4 , further comprising: a non-coating portion having an inner diameter larger than the outer diameter of the outer peripheral surfaces of the first region and the second region of the viscous material supply nozzle.

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