JP2008012843A - Mold assembly for injection molding shoe outsole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold assembly suitable for use in injection-molding shoe outsoles which is designed to have ground contact blocks having anti-skid effect, and the interfaces of whose flat ground contact surfaces and sides makes an angle. <P>SOLUTION: The mold assembly is for injection-molding outsoles designed to provide the bottoms of the outsoles with ground contact blocks in rows. A base mold 3A is fitted in the recess 1 formed on a mold main body 2. A design mold 4A is placed on the base mold 3A and fitted in the recess 1 together with the base mold 3A, and is fastened directly or indirectly with the base mold 3A with bolts 9 screwed in from the side of the mold main body 2. The design mold 4A has areas for forming ground contact blocks such as through-holes and notches 12. The inside wall of the areas is nearly perpendicular to the top surface of the base mold 3A upon which the design mold 4A rests. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention generally relates to an injection mold apparatus for use in injection molding a shoe sole of work shoes such as boots.

  For work shoes such as boots, the design (concave / convex pattern) of the shoe sole grounding part (stepping part and heel part) is made up of a number of grounding blocks arranged side by side, and the grounding block has its grounding (tip) surface. The anti-slip effect is expected by making the side (standing) surface substantially perpendicular to the grounding surface and providing an angle at the intersection of the side surface and the grounding surface. ing.

  In order to obtain the shoe sole grounding portion having the above-mentioned angle, a mold base is fitted to the mold body, and a step is formed between the first fitting member and the second fitting member on the mold base. There is used a mold apparatus having a structure in which the angles are formed adjacent to each other so that the angle is generated at the boundary between the steps (for example, Patent Document 1).

Japanese Patent No. 3689886

  In the conventional example, since the first and second fitting members must be combined for each grounding block, the combination operation is complicated, and in particular, there is a gap for degassing between the fitting members. Since the combination work must be performed while forming, it requires skill, and the fitting member itself is complicated to manufacture.

  The present invention has been devised for the purpose of avoiding the disadvantages of such conventional examples.

  In a shoe sole injection molding mold device designed by arranging a grounding block in parallel on the bottom surface of a shoe sole body, the mold body and a base mold incorporated in a recessed portion provided in the mold body, and the base mold The design molds that are stacked on the mold and incorporated in the recessed portion are fixed to each other directly or indirectly with a screw rod threaded from the mold body side, and the design molds A through-hole or notch-shaped grounding block forming portion having an inner wall surface substantially orthogonal to the upper surface of the base mold, which is the mounting surface of the design mold, is provided side by side.

  According to the present invention, a mold for an anti-slip shoe sole in which the intersection of the grounding surface and the side surface has an angle simply by incorporating the base mold and the design mold in a vertically stacked manner in the mold body. The device can be obtained easily.

  FIG. 1 shows an embodiment of a shoe sole injection molding mold apparatus according to the present invention, FIG. 1 is an exploded view partially showing a cross section, and FIG. 2 shows a first unique mold and a first base mold. FIG. 3 is a plan view of the first unique mold, FIG. 4 is a plan view of the first base mold with the insertion hole omitted, and FIG. 5 is a side view of FIG. 6 is a plan view of a mold body on the buttock side, FIG. 7 is a cross-sectional view taken along the line aa of FIG. 6, FIG. 8 is a cross-sectional view showing a use state on the heel part side, and FIG. FIG. 10 is a plan view of the first base mold of the second embodiment, and FIG. 10 is a front view of FIG.

  In the embodiment apparatus, the first base mold 3A is provided in the stepping portion 1a of the mold body 2 having the first recessed portion 1 in which the stepping portion 1a and the heel portion 1b are communicated with each other via the arch portion 1c. And the first unique mold 4A are stacked in a stacked manner on the top and bottom, and the second base metal is mounted on the second recess 1b 'provided in communication with the flange 1b below the flange 1b. The first mold 3B is formed by superposing the second design mold 4B on top and bottom and polymerizing the mold, and closing the upper surface side of the first recessed portion 1 with the upper mold 5 placed on the mold body 2. A material such as a thermoplastic resin is injected into the recessed portion 1 through an injection path 16 provided in the second base mold 3B and the second design mold 4B, and cured and demolded to obtain a shoe sole. Is.

  The first base mold 3A is composed of a flat plate with both upper and lower surfaces flat, and is positioned so as to coincide with the insertion hole 7 for inserting the first joining screw 6 provided vertically in the mold body 2. An insertion hole 10 is provided through which a screw hole 8 provided on the lower surface and a first connection screw 9 connected to the first unique mold 4A superimposed on the upper surface side are inserted, and vent holes 18,. It is configured.

  Like the first base mold 3A, the first unique mold 4A is composed of a perforated plate body having a contour shape substantially the same as the contour shape in plan view of the stepping portion 1a of the first recessed portion 1, A screw hole 11 into which the tip of the first connection screw 9 is screwed is provided at a position coinciding with the insertion hole 10 provided in the first base mold 3A, and a plurality of notches 12,. A grounding block forming material for a shoe sole is provided.

  , And the inner side surfaces 12a of the window holes 13, which constitute the grounding block forming part of the shoe sole, are substantially the same as the flat upper surface 3A 'of the first base mold 3A. They are arranged in an orthogonal direction, and the intersection of the upper surface 3 'constitutes a corner formed by the side surface of the shoe ground contact block and the contact surface.

  The first unique mold 4A and the first base mold 3A are threaded holes 11 at the tips through the insertion holes 10 so that the former is on the upper side and the first unique mold 4A is present on the air holes 18,. The first connecting screws 9 are connected to each other by the first connection screws 9 screwed into the first recessed portion 1, assembled into the stepping portion 1 a of the first recessed portion 1, and screwed into the screw holes 8 through the insertion holes 7 provided in the mold body 2. 6 is fixed to the mold body 1 and fixed thereto.

  Like the first unique design die 4A, the second design die 4B is composed of a perforated plate body having notches and window holes 15 (in the embodiment, only the window holes 15), and an inner side surface 15a of the window hole 15 is The second base mold 3B is arranged in a direction orthogonal to the flat upper surface 3B ', and is fixed to the second base mold 3B with a fixing screw 9' and placed on the second base mold 3B. In this state, it is incorporated into the second recess 1b ', tightened to the lower surface of the mold body 2 with a screw 20, and held in the second recess 1b'.

  Thus, when a material is injected from the injection port 21 through the injection path 16, the material is filled into an empty space formed by the upper mold 5, the first and second design molds 4A and 4B, and the mold body 2. The gas in the mold that flows into the notches 12 and the window holes 13 and 15 of the respective design molds 4A and 4B and is pressed by the material is a gap formed between the first unique design mold 4A and the first base mold 3A. It is discharged to the outside through the spiral groove and the vent hole 19 of the first joining screw 6 through the gap formed by the one base mold 3A and the mold main body 2, and the second design mold 4B and the second base mold are disposed on the flange side. 3B and the mold block 2 are discharged to the outside through a gap formed between the mold body 2 and the design blocks 4A and 4B and the base molds 3A and 3B. The grounding block has its tip surface (grounding surface) and side surface (rising surface). ) And the anti-slip effect It is to obtain a certain shoe soles.

  The first base mold 3A ′ of the second embodiment shown in FIG. 9 and FIG. 10 has a ventilation groove 17 provided on the surface facing the first unique mold 4A, that is, the upper surface, and is filled in the empty chamber. The material flows into the notches 12 and the window holes 13 and 15 of the design molds 4A and 4B, and the gas in the mold pressed by the material passes through the ventilation groove 17 and the first base mold 3A and the mold. It is discharged to the outside through a vent hole 19 provided in the bottom surface of the main body 2 from the gap with the main body 2.

  The first embodiment uses the vent hole 18 and the second embodiment uses the vent groove 17 to release the gas together with the use of the spiral groove of the screw rod (first joining screw 6, first connecting screw 9 or screw 20). However, although depending on the shape of the design molds 4A and 4B, the air holes 18 and the air grooves 17 may be omitted, and the gas venting using the spiral groove is not assumed. It is not inconvenient to use only the vent hole 18 or the vent groove 17 as the gas venting means.

The exploded view which showed a part in the section. The side view of the state which assembled | attached the 1st unique master mold and the 1st base mold. The top view of a 1st unique master mold. The top view of the 1st base metal mold | die which abbreviate | omitted and showed the insertion hole. The side view of FIG. The top view of the metal mold | die body of a buttocks side. FIG. 7 is a sectional view taken along line aa in FIG. 6. Sectional drawing which shows the use condition of the buttocks side. The top view of the 1st base metal mold | die of the 2nd Example which abbreviate | omitted and showed the insertion hole. The front view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st recessed part 2 Mold body 3A Base mold 4A Design mold 9 Screw rod 12 Notch 13 Through-hole

Claims (3)

  In a shoe sole injection molding mold device designed by arranging a grounding block in parallel on the bottom surface of a shoe sole body, the mold body and a base mold incorporated in a recessed portion provided in the mold body, and the base mold The design molds that are stacked on the mold and incorporated in the recessed portion are fixed to each other directly or indirectly with a screw rod threaded from the mold body side, and the design molds A mold device for injection molding of a shoe sole provided with an inner wall surface substantially orthogonal to the upper surface of the base mold, which is a mounting surface for the design mold, and provided with a through-hole or notch-shaped grounding block forming portion in parallel. .   2. The mold apparatus for injection molding of a shoe sole according to claim 1, wherein a vent hole is provided vertically at an appropriate position of the base mold so as to overlap with the design mold. The shoe mold for injection molding of a shoe sole according to claim 1, wherein said mold is overlapped with a design mold at an appropriate position on an upper surface of the base mold, and further, a ventilation groove is provided laterally to communicate with a gap between said base mold and the mold body. apparatus.

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