JP2015044600A - Spacer for loading metal product and method of manufacturing spacer for loading metal product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer capable of being especially used for loading of a metal product with greater weight, having small variation of strength, and to meet environmental protection.SOLUTION: A spacer for a metal product used so as to be held between the metal products comprises: core material extending to a prescribed direction; and covering material extending to a prescribed direction so as to cover at least a part of the core material.

Description

  The present invention relates to a metal product stacking spacer disposed between metal products when a heavy metal product such as a steel material is stacked, and a manufacturing method thereof.

  Heavy metal products such as steel manufactured at steelworks are sometimes placed on ground facilities such as warehouses and loaded into ships, vehicles, and aircraft as needed. In that case, a some metal product may be piled up and down.

  If metal products are brought into direct contact with each other, they can be rubbed and damaged. Therefore, a vertical gap is required between the metal products. Furthermore, in order to put a wire on a metal product or insert a transport device between metal products, a vertical gap is required between the metal products. In particular, a steel product having a large weight has a high necessity for a transfer device, and therefore it is important to provide a gap. In addition, if metal products are brought into direct contact with each other, cargo collapse occurs due to shaking during transportation, and there is a high risk of serious accidents. Therefore, a cushioning material that is difficult to slip between metal products is required.

  As a spacer for providing a gap between metal products and for providing a buffering effect, a long square member having a substantially square cross section cut from natural wood has been conventionally used. Wooden spacers called rootstocks have the advantage that they can be easily manufactured simply by cutting wood, and that metals are not easily damaged. In order to support heavy objects such as steel, wood with high compressive strength is required. For example, timber from tropical rainforests, especially hardwoods from southern ocean, are preferred.

  However, such wood resources are gradually being depleted, and from the viewpoint of resource protection, reduction of the amount used and longer life are required. In addition, spacers made only of wood vary in strength. For this reason, the mixture of weak spacers may cause unexpected load collapse, which is not preferable for safety. In addition, weak items are discarded when they are damaged, which is not preferable from the viewpoint of environmental protection. Therefore, there is a need for a spacer that can be used for loading particularly heavy metal products, has little variation in strength, and can protect the environment.

  A first metal product spacer of the present invention used by being sandwiched between metal products extends in a predetermined direction so as to cover at least a part of the core material including a long portion extending in a predetermined direction and the core material. And a covering material. The long portion is, for example, a hollow tubular member or a non-hollow rod-like member.

  In the first metal product spacer, the second metal product spacer has a substantially constant cross section perpendicular to the predetermined direction over at least a part of the predetermined direction, and the long portion has an outer shape in the cross section. It is substantially square, has first to fourth outer surfaces extending in a predetermined direction to define an outer shape in the cross section, and the covering material includes first to fourth outer shapes each having a substantially rectangular shape in the cross section. Including a coating, wherein one surface of the first coating is substantially parallel to the first outer surface, one surface of the second coating is approximately parallel to the second outer surface, and one of the third coating is One surface is substantially parallel to the third outer surface, one surface of the fourth coating is substantially parallel to the fourth outer surface, and the first outer surface and the second outer surface are first in the cross section. In the first direction, the widths of the first coating and the second coating are substantially the same as the width of the long portion, and the third width in the cross section is third. The outer surface and the fourth outer surface are substantially parallel to the second direction, and in the second direction, the widths of the third coating and the fourth coating are the lengths of the elongated portion, the first coating, and the second coating. It is approximately the same as the sum of the width.

  The third metal product spacer includes a long portion in which the core material extends in a predetermined direction in the first or second metal product spacer, and a protrusion integrally formed with the long portion, The covering material has a through hole in a direction inclined with respect to a predetermined direction, the protruding portion is formed so as to fill at least a part of the through hole, and the through hole extends toward the long portion of the protruding portion. It has a shape that prevents it from coming off.

  A first manufacturing method of a spacer for a metal product used by being sandwiched between metal products, comprising: a core material extending in a predetermined direction; and a covering material extending in a predetermined direction so as to cover at least a part of the core material. Is a step of disposing a covering material in a mold to form a covering inner hole extending at least in a predetermined direction and surrounded by the covering material, and a core material made fluid in the covering inner hole. Forming a core material by curing the material after pouring.

  In the first manufacturing method, the second manufacturing method further includes a step of forming a through hole in a direction inclined with respect to a predetermined direction in the covering material before pouring the material into the covering inner hole. When the material is poured, a part of the material flows into the through hole, and when the material is hardened, the protrusion is formed using the through hole as a mold, and the through hole prevents the protrusion from coming off in the direction of the coating inner hole. Has a shape.

  According to the spacer for metal products of the present invention, a strong material can be selected as the core material separately from the easily damaged coating material, so that the strength can be stabilized. Furthermore, since the damaged covering material can be separated from the strong core material, the core material can be easily reused, and the waste portion can be reduced, contributing to environmental protection.

It is a perspective view of the spacer of a 1st embodiment. It is a front view of the spacer of FIG. It is a perspective view of the spacer of 2nd Embodiment. It is a front view of the spacer of FIG. It is a perspective view of the spacer of 3rd Embodiment. It is sectional drawing of the spacer of FIG.

“First Embodiment”
FIG. 1 shows a spacer 100 of the first embodiment, and FIG. 2 shows a front view of the spacer 100 of FIG. 1 as viewed from the front. In addition, the front-rear direction, the left-right direction, and the up-down direction orthogonal to each other shown in all the drawings are defined for convenience in order to describe the structure of the spacer 100, and the absolute position when the spacer 100 is used is limited. Not what you want.

  As shown in FIG. 1, the spacer 100 includes a square pipe 110 and a covering material 120. The spacer 100 may have components other than the square pipe 110 and the covering material 120.

(Square pipe)
The square pipe 110 as a core material mainly responsible for the strength of the spacer 100 is long in the front-rear direction as shown in FIG. 1, and as shown in FIG. 2, the upper wall 111a, the lower wall 111b, the left wall 111c, and the right A wall 111d is provided, and the whole is integrally formed. When viewed from above and below, the upper wall 111a and the lower wall 111b have a flat plate shape that looks like a substantially rectangular shape surrounded by four sides along the front-rear direction and the left-right direction, and the thickness in the vertical direction is substantially constant. And are arranged substantially parallel to each other. When viewed from the left and right, the left wall 111c and the right wall 111d have a flat plate shape that appears to be substantially the same rectangle surrounded by four sides along the front-rear direction and the vertical direction, and the thickness in the left-right direction is substantially constant. And are arranged substantially parallel to each other.

  The left end of the upper wall 111a is connected to the upper end of the left wall 111c. The right end of the upper wall 111a is connected to the upper end of the right wall 111d. The left end of the lower wall 111b is connected to the lower end of the left wall 111c. The right end of the lower wall 111b is connected to the lower end of the right wall 111d. The upper wall 111a, the lower wall 111b, the left wall 111c, and the right wall 111d have the same length in the front-rear direction, and the end portions in the front-rear direction are at the same position in the front-rear direction.

  The square pipe 110 has a pipe inner hole 112 surrounded by an upper wall 111a, a lower wall 111b, a left wall 111c, and a right wall 111d in the vertical and horizontal directions. The pipe inner hole 112 is open at both ends in the front-rear direction. The cross section of the inner surface and the outer surface of the square pipe 110 along a plane orthogonal to the front-rear direction is a substantially constant square shape at any position in the front-rear direction.

  The square pipe 110 of the present embodiment is made of iron, but may be made of other metals, or may be formed of a resin or other strong material. Since the thickness of the square pipe 110 is constant, the vertical and horizontal strength is preferably constant, but the thickness of the square pipe 110 may vary depending on the position. Compared to the case where the entire spacer 100 is made of wood, when the spacer 100 receives a force in the vertical and horizontal directions, the spacer 100 exhibits at least one of a property that is difficult to bend, a property that is not easily compressed, and a property that is difficult to break. Thus, it is preferable to select the material of the square pipe 110.

(Coating material)
As shown in FIG. 1, the covering material 120 is long in the front-rear direction, and as shown in FIG. 2, the covering material 120 includes an upper covering 121, a lower covering 122, a left covering 123, and a right covering 124. The upper coating 121, the lower coating 122, the left coating 123, and the right coating 124 all have a substantially rectangular parallelepiped shape, and each surface has two surfaces orthogonal to the vertical direction, two surfaces orthogonal to the front-rear direction, and left and right It is composed of two surfaces orthogonal to the direction. The upper coating 121 and the lower coating 122 have substantially the same shape, and the left coating 123 and the right coating 124 have substantially the same shape. The upper covering 121, the lower covering 122, the left covering 123, and the right covering 124 have the same length in the front-rear direction, and the end portions in the front-rear direction are at the same position in the front-rear direction.

  As shown in FIG. 2, the upper cover 121 is in contact with the upper surface of the upper wall 111a of the square pipe 110, and the left and right widths of the upper cover 121 are larger than the left and right widths of the upper wall 111a. The lower covering 122 is in contact with the lower surface of the lower wall 111b of the square pipe 110, and the left and right widths of the lower covering 122 are larger than the left and right widths of the lower wall 111b.

  The left covering 123 is in contact with the left surface of the left wall 111c of the square pipe 110, and the vertical width of the left covering 123 is substantially the same as the vertical width of the left wall 111c. The left coating 123 is sandwiched between the upper coating 121 and the lower coating 122. The right coating 124 is in contact with the right surface of the right wall 111d of the square pipe 110, and the vertical width of the right coating 124 is substantially the same as the vertical width of the right wall 111d. The right coating 124 is sandwiched between the upper coating 121 and the lower coating 122.

  The left outer surface of the covering material 120 composed of the upper covering 121, the lower covering 122, and the left covering 123 is formed to be flush with each other so that there is almost no step. The right outer surface of the covering material 120, which is composed of the upper covering 121, the lower covering 122, and the right covering 124, is formed so that there is almost no step. The covering material 120 defines a covering material inner hole 125 surrounded by an upper covering 121, a lower covering 122, a left covering 123, and a right covering 124 in the upper, lower, left and right directions. The covering material inner holes 125 are opened at both ends in the front-rear direction. The cross section of the inner surface and the outer surface of the covering material 120 along a plane orthogonal to the front-rear direction is a substantially constant square shape at any position in the front-rear direction.

  Although the covering material 120 of this embodiment is wooden, rubber | gum, resin, felt material, etc. may be sufficient. However, the covering material 120 preferably has a large friction coefficient. Moreover, it is preferable that the coating | covering material 120 is a material which is hard to damage metal products, such as a steel plate used. In addition, although the coating | covering material 120 of this embodiment is comprised so that the upper and lower sides and right and left of the square pipe 110 may be coat | covered, you may coat | cover only the side which contacts a metal product at the time of use. The covering material 120 of this embodiment does not cover the front and rear of the square pipe 110, but may cover the front and rear.

(Assembly)
The square pipe 110 is closely fitted in the covering material inner hole 125. The upper cover 121, the lower cover 122, the left cover 123, and the right cover 124 of the square pipe 110 and the covering material 120 are fixed by a binding member so as not to be easily disassembled. Examples of the binding member include, but are not limited to, an adhesive, a metal or resin binding band, a bolt, a screw, and a metal fitting. However, it is preferable that the square pipe 110 and the covering material 120 can be decomposed by some kind of action when necessary by appropriately using predetermined heat, force, chemicals, and the like.

(how to use)
In actual use, the spacer 100 of the present embodiment preferably has the upper coating 121 disposed on the upper side and the lower coating 122 disposed on the lower side, as shown in FIG. Although the upper surface of the upper coating 121 and the lower surface of the lower coating 122 are in direct contact with the stacked metal products, there is no possibility of the stacked metal products being caught because there is no joint between members, and the surface load is made uniform. Can be dispersed. At the same time, the left covering 123 and the right covering 124 can support the left and right ends of the upper covering 121 and the lower covering 122 while protecting the left and right. However, since the outer shape of the cross section orthogonal to the front-rear direction is square, the spacer 100 of the present embodiment can be used at the same height even if the left covering 123 and the right covering 124 are arranged vertically. The spacer 100 may have different vertical and horizontal widths in a cross section perpendicular to the front-rear direction.

(effect)
Since the spacer 100 of the present embodiment uses the square pipe 110 as a core material, it is possible to reduce variation in strength between individuals as compared with a case where the whole is made of wood, and it is easy to achieve a target strength. Therefore, a heavy metal product such as a steel plate can be safely loaded. In order to make the strength uniform, it is preferable that the core material is not a natural product such as wood, but an artificial product such as metal, resin, or concrete. Since the square pipe 110 is provided with a pipe inner hole 112, a conveying device can be inserted into the pipe inner hole 112, and the strength and weight are changed by adjusting the size of the pipe inner hole 112. be able to. It should be noted that the pipe inner hole 112 may be filled with resin to further increase the strength or prevent the square pipe 110 from rusting.

  In addition, since the covering material 120 is formed by combining four small flat plates, it is easier to obtain materials than a case where one large member is prepared, and a small-diameter tree and a small one that are less in demand in the construction industry. Effective use of mill ends can contribute to environmental protection. Further, by combining the covering material 120 that is hard to damage the metal product but is easily damaged by the metal product, and the square pipe 110 formed of a relatively strong material, the metal product can be protected while increasing the overall strength. . When the covering material 120 is damaged, the square pipe 110 and the covering material 120 can be separated, and only the covering material 120 can be discarded to reuse the square pipe 110. Therefore, it can reduce garbage and is environmentally friendly.

  In this embodiment, when viewed in a cross section orthogonal to the front-rear direction, the length of one side of the outer shape of the square pipe 110 is about 6 cm, and the length of one side of the outer shape of the spacer 100 is about 10 cm. It may be a length. The length of the spacer 100 in the front-rear direction is about 95 cm, but other lengths may be used.

“Second Embodiment”
FIG. 3 shows a spacer 200 of the second embodiment, and FIG. 4 shows a front view of the spacer 200 of FIG. 3 as viewed from the front. As shown in FIG. 3, the spacer 200 includes a prismatic member 210 and a covering material 220. The spacer 200 may have components other than the prismatic member 210 and the covering material 220.

(Coating material)
The covering material 220 of the present embodiment shown in FIG. 3 is the same as the covering material 120 of the first embodiment shown in FIG. The upper coating 221 corresponds to the upper coating 121, the lower coating 222 corresponds to the lower coating 122, the left coating 223 corresponds to the left coating 123, the right coating 224 corresponds to the right coating 124, and the coating material inner hole 225 corresponds to the covering material inner hole 125.

(Square column member)
As shown in FIG. 3, the prismatic member 210 as a core material mainly responsible for the strength of the spacer 200 is long in the front-rear direction and continues from the front end to the rear end of the covering material 220. As shown in the front view of FIG. 4, the prismatic member 210 fills the covering material inner hole 225. The cross sections of the inner surface and the outer surface of the prismatic member 210 along the plane orthogonal to the front-rear direction are substantially constant square shapes at any position in the front-rear direction.

  The prismatic member 210 of the present embodiment is made of resin, but may be formed of concrete, metal or other strong material. Compared with the case where the entire spacer 200 is made of wood, when the spacer 200 receives a force in the vertical and horizontal directions, the spacer 200 exhibits at least one of a property that is difficult to bend, a property that is difficult to be compressed, and a property that is difficult to break. As described above, it is preferable to select a material for the prismatic member 210.

(Production method)
First, an inner mold close to the outer shape of the spacer 200 is prepared. Next, the covering material 220 is disposed in the mold according to the final form. Next, from one end in the longitudinal direction of the mold, the resin which is the material of the prism member 210 is melted and injected into the covering material inner hole 225 as a fluid. If the resin pressure exceeds a predetermined value, it is determined that the injection is complete. Next, the covering material 220 and the resin are put in the cooling tank together with the mold and passed therethrough. When the resin is cured to some extent, the completed spacer 200 is removed from the mold. By doing in this way, the prismatic member 210 can be shape | molded by using the coating | covering material 220 as a type | mold. Therefore, the errors in the shapes of the covering material inner hole 225 and the prismatic member 210 are smaller than when the prismatic member 210 is molded alone. When using the manufacturing method of the present embodiment, as a material of the prismatic member 210, a material that can temporarily have fluidity when injected into the coating material inner hole 225 and can fix its shape after injection, for example, thermoplastic Resin and concrete can be used.

(The entire)
In addition, since the prismatic member 210 and the covering material 220 can be fixed by a bundling member similar to that of the first embodiment, description thereof is omitted. Since the usage method and effect of the spacer 200 are the same as those in the first embodiment except that the pipe inner hole 112 cannot be used, the description thereof is omitted.

“Third Embodiment”
FIG. 5 shows a spacer 300 of the third embodiment, and FIG. 6 shows a cross-sectional view of the spacer 300 of FIG. FIG. 6 is a view of a cross section taken along the plane orthogonal to the front-rear direction of FIG. As shown in FIG. 5, the spacer 300 includes a core material 305 and a covering material 320. The spacer 300 may have components other than the core material 305 and the covering material 320.

(Coating material)
The covering material 320 of the present embodiment shown in FIG. 5 is the same as the covering material 120 of the first embodiment shown in FIG. 1 except that a plurality of through holes 331 are provided. Will not be described. The upper coating 321 corresponds to the upper coating 121, the lower coating 322 corresponds to the lower coating 122, the left coating 323 corresponds to the left coating 123, the right coating 324 corresponds to the right coating 124, and the coating material inner hole 325 corresponds to the covering material inner hole 125.

  As shown in FIG. 5, three through holes 331 are provided in the top coating 321 of this embodiment. The three through-holes 331 are arranged at a constant interval in the front-rear direction at the center in the left-right direction. As shown in FIG. 6, the through-hole 331 of the top coating 321 penetrates in the vertical direction. The through-hole 331 includes an upper large-diameter hole 332 and a lower small-diameter hole 333 communicating with the upper-diameter hole 332. The large-diameter hole 332 and the small-diameter hole 333 are cylindrical holes having a common central axis in the vertical direction. The radius of the large diameter hole 332 is larger than the radius of the small diameter hole 333.

  The through hole 331 of the right coating 324 is disposed at a position obtained by rotating the through hole 331 of the upper coating 321 by 90 degrees clockwise. The through hole 331 of the left cover 323 is disposed at a position obtained by rotating the through hole 331 of the upper cover 321 by 90 degrees counterclockwise. The through hole 331 of the lower coating 322 is disposed at a position obtained by rotating the through hole 331 of the upper coating 321 by 180 degrees. The centers of these rotations are the top, bottom, left and right centers of the spacer 300 shown in FIG. In this embodiment, three through holes 331 are provided at equal intervals in each of the upper coating 321, the lower coating 322, the left coating 323, and the right coating 324, but the upper coating 321, the lower coating 322, The number, size, shape, or position of the through-holes 331 may be different between the left cover 323 and the right cover 324, and may be more or less than this, and the cover does not include the through-hole 331. There may be.

(Heartwood)
A core material 305 according to this embodiment shown in FIG. 5 includes a prism member 310 that bears the strength of the spacer 300 and a protrusion 330. The prism member 310 is the same as the prism member 210 of the second embodiment shown in FIG. The core material 305 of the present embodiment is different from the second embodiment in that a plurality of protrusions 330 are provided. The protrusion 330 has a shape that completely fills the through hole 331 of the covering material 320 and is integrally formed with the prism member 310 that fills the covering material inner hole 325. Since the material of the core material 305 of the present embodiment is the same as the material of the prismatic member 210 of the second embodiment, description thereof is omitted.

(Production method)
First, an inner mold close to the outer shape of the spacer 300 is prepared. Next, the covering material 320 is arranged in the mold according to the final form. Next, the resin that is the material of the core material 305 is melted and injected into the covering material inner hole 325 from one end in the longitudinal direction of the mold as a fluid. When the resin is injected into the covering material inner hole 325, the resin also flows into the through hole 331. At this time, since the outside of the through hole 331 is covered with the mold, the resin does not flow out of the through hole 331. If the resin pressure exceeds a predetermined value, it is determined that the injection is complete. Next, the covering material 320 and the resin are put in a cooling tank together with the mold and passed therethrough. Next, when the resin is cured to some extent, the completed spacer 300 is taken out from the mold. According to this manufacturing method, the prismatic member 310 and the protruding portion 330 can be molded using the covering material 320 as a mold. Therefore, as compared with the case where the core material 305 is molded alone, the error in the shape of the core material 305 and the covering material inner hole 325 and the through-hole 331 is reduced. That is, it is possible to prevent a decrease in strength due to a gap.

(The entire)
The through hole 331 includes an outer large-diameter hole 332 far from the covering material inner hole 325 and a small-diameter hole 333 close to the covering material inner hole 325. For this reason, in the protruding portion 330 formed using the through-hole 331 as a mold, a portion using the large-diameter hole 332 as a mold cannot pass through the small-diameter hole 333. Accordingly, none of the upper coating 321, the lower coating 322, the left coating 323, and the right coating 324 is easily removed even when receiving a force to separate from the prism member 310. However, the protrusion 330 or the through-hole 331 may be deformed or broken when some action such as extremely large force, heat, chemicals, or the like is applied so as to be disassembled.

  Since the protrusion 330 can be molded using the through-hole 331 as a mold, the shape error between the protrusion 330 and the through-hole 331 is smaller than when the protrusion 330 is formed independently. That is, it is possible to prevent a decrease in strength due to a gap. Further, since the prismatic member 310 and the protruding portion 330 of the core material 305 can be formed at the same time, the processing is simple. Since the exposed material is resin from the through hole 331 to the outside, the metal product is less likely to be damaged than when metal is used for binding. Since the core material 305 and the covering material 320 are firmly fixed in the process of forming the core material 305, a binding member as in the first embodiment is not necessary. However, you may further use the bundling member similar to 1st Embodiment.

  In addition, since the usage method and effect of the spacer 300 are the same as that of 2nd Embodiment except the point regarding the protrusion part 330 and the through-hole 331, description is abbreviate | omitted.

(Shape of the through hole)
Any direction in which the prismatic member 310 and one of the coverings of the covering member 320 are separated from each other is defined as a separating direction. In the through-hole 331, a first position close to the covering material inner hole 325 arranged along at least one separating direction and a second position far from the covering material inner hole 325 are assumed. And it is preferable that the first position and the second position exist such that the width of the first position is smaller than the width of the second position when the widths in the direction perpendicular to the separating direction are compared. . However, if the protrusion 330 does not easily come out of the through-hole 331 when a force that separates the upper coating 321, the lower coating 322, the left coating 323, and the right coating 324 from the prism member 310 is applied, the through-hole 331 may have other shapes. For example, it may be a cone whose diameter gradually increases from the side closer to the covering material inner hole 325 to the side farther from the side.

100 spacer 110 square pipe 111a upper wall 111b lower wall 111c left wall 111d right wall 112 pipe inner hole 120 covering material 121 upper covering 122 lower covering 123 left covering 124 right covering 125 covering material inner hole 200 spacer 210 rectangular column member 220 covering material 221 Upper coating 222 Lower coating 223 Left coating 224 Right coating 225 Coating material inner hole 300 Spacer 305 Core material 310 Square column member 320 Coating material 321 Upper coating 322 Lower coating 323 Left coating 324 Right coating 325 Coating material inner hole 330 Protruding portion 331 Through hole 332 Large diameter hole 333 Small diameter hole

Claims (5)

A core material including a long portion extending in a predetermined direction;
A covering material extending in the predetermined direction so as to cover at least a part of the core material;
A spacer for metal products to be used by being sandwiched between metal products. The cross section perpendicular to the predetermined direction is substantially constant over at least a part of the predetermined direction,
The elongate portion has first to fourth outer surfaces that have a substantially square outer shape in the cross section and extend in the predetermined direction to define the outer shape in the cross section,
The covering material includes first to fourth coverings each having a substantially rectangular outer shape in the cross section,
One surface of the first coating is in close proximity to the first outer surface, one surface of the second coating is in close proximity to the second outer surface, and One surface is substantially parallel to the third outer surface, and one surface of the fourth coating is substantially parallel to the fourth outer surface;
In the cross section, the first outer surface and the second outer surface are substantially parallel to the first direction, and in the first direction, the width of the first coating and the second coating is the long Is approximately the same as the width of the shank,
In the cross section, the third outer surface and the fourth outer surface are substantially parallel to the second direction, and in the second direction, the widths of the third coating and the fourth coating are the long Substantially the same as the sum of the scale, the width of the first coating and the width of the second coating,
The spacer for metal products of Claim 1. The core material includes a long portion extending in the predetermined direction, and a protrusion formed integrally with the long portion,
The covering material has a through hole in a direction inclined with respect to the predetermined direction;
The protrusion is formed to fill at least a part of the through hole;
The through-hole has a shape that prevents the protruding portion from coming out in the direction of the elongated portion,
The spacer for metal products of Claim 1 or Claim 2. A metal product spacer comprising a core material extending in a predetermined direction and a covering material extending in the predetermined direction so as to cover at least a part of the core material. There,
Disposing the covering material in a mold, and forming a covering inner hole extending in the predetermined direction, at least partially surrounded by the covering material;
Forming the core material by curing the material after pouring the material of the core material in a fluidized state into the coated inner hole;
The manufacturing method of the spacer for metal products containing this. Before pouring the material into the coating inner hole, further comprising the step of forming a through hole in the direction inclined with respect to the predetermined direction in the coating material,
When the material is poured into the covering inner hole, a part of the material flows into the through hole, and when the material is cured, a protrusion is formed using the through hole as a mold,
The through hole has a shape that prevents the protruding portion from coming off in the direction of the covering inner hole.
The manufacturing method of the spacer for metal products of Claim 4.

Images