JP3042182U - Urethane sole mold - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a mold capable of releasing a urethane sole after foam molding even if the heel is high. SOLUTION: The demolding rod supporting portion 8 is used when molding a urethane sole for footwear, can be divided into an upper mold 2 and a lower mold 3, and has a notch 9 at the upper end at the longitudinal end of the lower mold 3. Is provided so that the upper end of the mold protrudes from the upper surface of the lower mold 3.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is a mold used for manufacturing a raw material such as a liquid polyisocyanate or polyether, or a raw material such as polyisocyanate or polyester, stirring and foaming and solidifying the molded article, particularly a urethane sole for footwear. Regarding

[0002]

[Prior art]

 In general, urethane soles for footwear are mainly composed of a mixture containing polyisocyanate and polyether as a main component or a polyisocyanate and polyester in a cavity recessed in a lower mold of a mold that can be separated into a lower mold and an upper mold. The upper mold was closed by pouring the mixture as a component, and the liquid mixture was changed to polyurethane and foamed, and at the same time solidified and kept warm until it was cast into the shape of the cavity having the outer surface shape of the urethane sole, and then the mold was changed. It is manufactured by opening and demolding.

Since the urethane sole in the molding die is in close contact with the molding die, when releasing the urethane sole, a nozzle connected to a compressed air source is inserted between the molding die and the urethane sole to inject air, As shown in FIG. 5 and FIG. 6 for explaining the method of lifting up or the state of releasing the urethane sole from the mold, one of the ends of the metal rod is a pointed end and the other end of the release rod 12 with a grip is provided. A method in which the pointed end is pierced into the urethane sole S, and the grip 13 is pushed down like a lever with the upper end of the side wall surface 6 behind the heel portion 5 of the cavity 4 of the lower mold 3 as a fulcrum to lift the urethane sole S up It was done.

The above method of injecting air between the molding die and the urethane sole to raise the urethane sole requires a compressed air generating device, which requires extra equipment costs, and is also difficult to remove from the mold. Move the nozzle from the prescribed position between the molding die and the urethane sole, insert it, open the valve, raise the urethane sole, close the valve, remove the product from the mold, and return the nozzle to the prescribed position. There are many steps in a series of operations, and productivity is poor. The method in which the tip of the demolding rod 12 is pierced into the urethane sole S and lifted up has a lower equipment cost than the above method, and the series of steps for demolding is small and human productivity is high. Because it is widely used. However, when manufacturing a urethane sole with a high heel, in other words, using a mold in which the heel portion 5 of the cavity 4 is deep, the urethane sole is pierced with a demolding rod and moved like a lever to lift the urethane. The sole is rotated around the fulcrum of the leverage, in other words, the upper end of the side wall of the cavity, and is pressed against the side wall surface 7 on the front side of the heel portion 5, so that it is hard to lift. If you push down the grip of the demolding rod forcibly, the urethane roller may break at the part where the demolding rod is stabbed, so this method is difficult because of the height of the heel.

[0005]

[Problems to be solved by the device]

 The present invention has been made for the purpose of providing a molding die that allows the urethane sole to be removed from the mold even after the heel is raised without using an expensive special device.

[0006]

[Means for Solving the Problems]

 Stick one end of the release rod into the urethane sole and push down the other end to rotate it around the fulcrum like a lever to lift up the urethane sole. The rising height is the sine of the inclination angle α of the demolding rod with respect to the upper surface of the molding die at the time of piercing, at the distance l from the fulcrum to the intersection of the imaginary line extending along the demolding rod and the front side wall surface of the heel. ) And the sine difference of the tilt angle β when rotating around the fulcrum. Therefore, if the fulcrum of the demolding rod is separated from the cavity and the distance l from the fulcrum to the intersection of the imaginary line of extension of the demolding rod and the front side wall surface of the heel portion is increased, a small rotation angle of the demolding rod can be used for the urethane sole. Can be greatly lifted, and the position where the demolding stick pierces the urethane sole is away from the rear end, so it is hard to break even when piercing at a deep angle.

The present invention was made in consideration of the movement of the above-mentioned demolding rod as a lever. That is, the present invention can be divided into an upper mold and a lower mold, and in a urethane sole molding mold used for molding a urethane sole for footwear by mixing and stirring liquid raw materials, foaming and solidifying, This is a urethane sole molding die in which a demolding rod supporting portion is provided at an end in the longitudinal direction, and the upper end of the demolding rod supporting portion projects from the upper surface of the lower die.

[0008]

[Embodiment of the invention]

 The demolding rod support is installed at the rear end of the mold, in other words, along the outer surface of the mold on the side where the heel part is located, at a position away from the rear end of the mold, and behind the cavity. It may be at any intermediate position between the side wall surface and the rear end of the mold. The upper end of the demolding rod support is projected from the upper surface of the cavity of the molding die, which is located outside the rear, so that the cavity can be seen through from the upper end. It is preferable that a notch for receiving the demolding rod is provided at the upper end of the demolding rod support portion, and that it is provided at two locations so that the two demolding rods can be simultaneously operated by both hands.

[0009]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of the mold of the present invention, and FIG. 2 is a side view of the mold of the present invention. According to FIG. 1, the molding die 1 is composed of an upper die 2 and a lower die 3 connected by a hinge 10. A cavity 4 having substantially the same shape as the urethane sole is recessed in the lower die 3, and a demolding rod support portion 8 and a clamp device 11 are provided at a position apart from the right end of the die via a support portion. The clamp device 11 is provided to place the upper mold 2 on the lower mold 3 in which the raw material mixture is injected into the cavity as shown by the chain double-dashed line and to clamp both molds. As shown in FIG. 2, two notches 9 and 9'are provided on the upper end of the demolding rod supporting portion 8 to serve as a receiving of the demolding rod when demolding.

A method of removing the urethane sole foam-molded by the usual method using the above-mentioned mold will be described. As shown in FIG. 3 which is a perspective view for explaining the state of demolding and FIG. 4 which is the same cross section, the tips of two demolding rods 12 are obliquely stabbed into the heel portion of the urethane sole S in the molding die. , The middle portion is fitted into the notch 9 of the demolding rod support portion 8 to form a lever, and the grip 13 is pushed downward to move the tip upward so that the urethane sole is lifted, and the lifted portion is grasped by hand and released. Mold.

[0011]

[Effect of the invention]

 By providing a demolding rod support at the heel side end of the mold cavity, the demolding rod pierced in the urethane sole inside the mold moves like a lever and lifts the urethane sole during demolding. The fulcrum position of the lever moves from the upper end of the rear side wall surface of the cavity to the demolding rod support, and the distance l from the fulcrum to the intersection of the imaginary line extending along the demolding rod and the side wall on the front side of the heel of the cavity is long. Become. The height at which the urethane sole is lifted is determined by the above distance 1 and the difference between the sine of the tilt angle before rotating around the fulcrum of the demolding rod with respect to the upper surface of the mold and the sine of the tilt angle after rotating. Therefore, by moving the fulcrum to the demolding rod support and increasing the distance l, the rotation angle of the demolding rod required to lift the urethane sole to a position where it can be gripped becomes smaller and the urethane sole is The direction of pushing up is upward, and it floats up so as to come out of the cavity. Since the urethane sole floats up so that it will come out of the cavity, it will not easily break even if the heel of the cavity is deep. In addition, the piercing position of the demolding rod can be made deeper in the center of the heel, which increases resistance to tearing, and in combination with the above-mentioned effect of reducing rupture by moving the fulcrum position, tearing during demolding occurs. Hard to do.

[Brief description of the drawings]

1 is a cross-sectional view of a mold of the present invention.

FIG. 2 is a side view of the mold of the present invention.

FIG. 3 is a perspective view illustrating a state where the urethane sole is released from the mold of the present invention.

FIG. 4 is a cross-sectional view illustrating a state where the urethane sole is released from the mold of the present invention.

FIG. 5 is a perspective view illustrating a state where a urethane sole is released from a conventional molding die.

FIG. 6 is a cross-sectional view illustrating a state where a urethane sole is released from a conventional molding die.

[Explanation of symbols]

 1 Mold 2 Upper mold 3 Lower mold 8 Demolding rod support 9 Notch 9'Notch 12 Demolding rod

Claims (2)

[Utility model registration claims] 1. A urethane sole molding die which can be divided into an upper mold and a lower mold, and which is used when a liquid material is mixed, stirred, foamed and solidified to mold a urethane sole for footwear,
A urethane sole molding die characterized in that a demolding rod support portion is provided at an end in the longitudinal direction of the lower die, and an upper end of the demolding rod support portion projects from an upper surface of the lower die. 2. The urethane sole molding die according to claim 1, wherein two notches for supporting the demolding rod are provided at an upper end of the demolding rod supporting portion.