WO2017004857A1

WO2017004857A1 - Shoe injection mold and shoe injection molding method using same

Info

Publication number: WO2017004857A1
Application number: PCT/CN2015/085405
Authority: WO
Inventors: 涂波
Original assignee: 涂波
Priority date: 2015-05-08
Filing date: 2015-07-29
Publication date: 2017-01-12
Also published as: CN104985755A; CN104985755B; JP6518776B2; JP2017535461A

Abstract

The present invention relates to a shoe injection mold and a shoe injection molding method using the same. The mold comprises a last mold, an outer mold, an injection nozzle and a corresponding mold opening and closing mechanism. The external mold comprises a mutually matching clamp mold and first bottom mold. The bottom of the last mold is provided with a concave injection recess. The first bottom mold is provided with an injection nozzle through-hole opposite to the position of the injection recess. After closing the mold, the injection nozzle passes through the injection nozzle hole, with an inner end thereof located in the injection recess and an outer end thereof located outside the outer mold. The method injects a molten plastic material into the injection recess via the injection nozzle, enabling a plastic forming material to press a stocking from a stocking inner side against an inner surface of the outer mold until the plastic material fills a shaping cavity. The invention can produce injection-formed shoes with various fabrics, and the shoes have a good feel, a simple production process and a low cost, favorably satisfying consumer needs.

Description

Injection molding die for shoes and injection molding method

Technical field

The present invention relates to an injection molding die for a shoe, and to an injection molding method for the mold.

Background technique

The injection molding method of the existing shoes is to injection-molded a thermoplastic material such as PVC or TPR into an injection molding die of an injection molding machine, and the molding die usually includes a core and an outer mold, wherein the core is usually called a die or a hoe, and the outer core is usually called a dies or a hoe. The mold adopts an openable and detachable component, which can be divided into two parts, a clamping die and a bottom die, wherein the bottom die corresponds to the outer surface of the sole, and the clamping die is the rest of the outer die, and generally includes two parts which can be opened and closed, which can be called For the left clamping mode and the right clamping die, the bottom die may be one or more according to the needs of the injection molding process, and is used for sequentially forming the layers of the sole (if the sole is multi-layered), and the outer mold is closed after molding. The core is enclosed therein, and the gap between the core and the core constitutes a cavity for forming the shoe. When used, the mold is inverted, the sole is facing upward, and the bottom mold is fastened to the top of the mold, and the heat is passed through the main inlet on the bottom mold. The plastic material is injected into the cavity. When the fabric needs to be set, the cloth is sleeved on the hoe, and the molten material injected from the injection port of the bottom mold is pressed onto the hoe and the sleeve is bonded, and the sock is formed. Forming the fabric lining of the shoe, In this way only the injection molding fabric formed inside the shoe, so that the fabric can be in the outer surface of the shoe.

Summary of the invention

In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides an injection molding die for a shoe and an injection molding method using the same, by which a cloth can be injection molded (referred to as various A flexible sheet material such as textile fabric, flannel or leather) is a shoe that is applied to the outer surface of the shoe.

The technical solution adopted by the invention is: an injection molding die for a shoe, comprising a die, an outer die, a injection nozzle and a corresponding opening and closing die mechanism, the outer die comprising a clamping die and a first bottom die, a bottom of the die is provided with a concave injection groove, and the first bottom mold is provided with a nozzle through hole corresponding to the position of the injection groove, and the injection nozzle passes through the mold after the mold is closed. The nozzle hole is described, the inner end is located in the injection groove, and the outer end is located outside the outer mold.

A method for injection molding a shoe, the mold used includes a die, an outer die and a injection nozzle, the outer die comprising a clamping die and a first bottom die, and the bottom of the die is provided with a concave injection a slot, the first bottom mold is provided with a nozzle opening corresponding to the injection slot, and a sock hole corresponding to the injection slot is opened on the sock, and the sock is sleeved on the sleeve Forming, after the mold clamping, the injection nozzle extends through the injection hole into the injection tank, and the molten plastic material is injected into the injection tank through the injection nozzle to shape the molding material A sock sleeve is pressed from the inner side of the sock over the inner surface of the outer mold until the plastic material fills the cavity.

The invention has the beneficial effects that since the injection tank is arranged on the ram and the material is directly injected into the injection tank through the injection nozzle, the material entering the injection tank is continuously injected by the injection molding machine, and the material is injected from the injection molding machine. The groove flows outward along the gap between the injection groove and the injection nozzle. Since the injection groove is located inside the sock, the material flowing out of the injection groove is pressed outwards until the sock is attached to the inner surface of the outer mold. At the same time, the material flows in the cavity between the sock and the die, and the air in the cavity is extruded from the air outlet of the mold until the cavity is filled, and the appearance of the formed shoe is a cloth surface formed by the sock. It has the texture and color of the corresponding fabric. Since the fabric can be made of various suitable materials and can be set into various colors and/or patterns, the texture of the shoe is good, the preparation process is simple, and the cost is low, which is beneficial to better meet people's needs. .

DRAWINGS

Figure 1 is a schematic view showing the construction of a mold of the present invention;

2 is a schematic structural view of a mold according to the present invention involving a nozzle, a feed slot, and a flow guiding groove;

Figure 3 is a schematic view showing the construction of the bottom surface of the mold of the present invention.

detailed description

1-3, the present invention relates to an injection molding die for a shoe, comprising a die 10, an outer die, a nozzle 30 and a corresponding opening and closing die mechanism, the outer die including a clamping die 40 and a first a bottom mold 20, the bottom of the mold is provided with a concave injection groove 11, and the first bottom mold is provided with a nozzle through hole opposite to the position of the injection groove, after the mold clamping The injection nozzle passes through the injection nozzle hole, the inner end 31 is located in the injection groove, and the outer end is located outside the outer mold. The opening and closing mechanism can adopt the prior art, according to the overall structure of the outer mold, to drive the outer mold to open and close, when the clamping mold is divided into two parts, a left clamping mold and a right clamping mold, the corresponding clamping opening and closing mechanism can Driving the left clamping mold and/or the right clamping mold to open and close the clamping mold, and the opening and closing mechanism corresponding to the first bottom mold driving the first bottom mold to open and close, when a plurality of bottom molds are provided, that is, the sole When multiple injections are required, in addition to the first bottom mold, one or more subsequent sole injection bottom molds may be provided, which may be sequentially processed according to the injection process of the multilayer material by a corresponding robot or other form of opening and closing mechanism. Different bottom molds are fastened to the clamping mold for injecting different layers of materials on the sole to form a multi-layer composite sole. The injection nozzle can also be inserted into the first bottom mold through a corresponding robot, or can be injected. The nozzle is pre-mounted on the first counter, or any other means that the injection nozzle can be inserted into the guide slot during the injection process involving the first counter, and subsequent injection of the sole can employ any suitable prior art.

Preferably, the injection trough is a cylindrical trough, and the injection nozzle adopts a circular tube shape, thereby matching with a cylindrical injection trough, leaving a circle between the injection trough and the injection nozzle The annular gap is not only simple in structure, but also the material flows outward from the annular gap between the injection nozzle and the injection groove, which can make The sock around the injection nozzle is subjected to an outward pressing force. Even if the sock is partially attached to the injection nozzle, the sock sleeve of the ring injection nozzle can be driven upward by the pressing force of other parts. The movement of the outer mold helps to reduce or avoid material spillage to the outside of the sock.

Preferably, the outer mold further comprises one or more subsequent sole injection bottom molds matched with the clamping mold, so as to integrally form the upper and the first layer sole in the first injection, and then inject the bottom mold with the subsequent sole The sole is infused multiple times to form a multi-layer composite sole. After injecting the first layer of the sole material, the sock sleeve at the bottom of the shoe is exposed on the outer surface of the first layer of the sole, and then the second bottom mold is injected into the second layer of the sole material, and the sole can be passed through the second layer of the sole material. The sock of the part is clamped inside the multi-layered sole, and the material of the subsequent layers (if any) of the sole can be injected using the prior art.

Preferably, the bottom surface of the die (corresponding to the face of the sole) is provided with a plurality of mutually communicating flow guiding grooves 12, and the guiding grooves have a discontinuous convex structure 13 between the guiding grooves. The flow groove is in communication with the injection groove, that is, the injection groove is opened on the flow guiding groove or a part of the flow guiding groove is opened on the injection groove, thereby the material flowing out from the flow guiding groove can be along The guiding groove moves smoothly and smoothly spreads in various areas at the bottom of the boring mold. Under continuous injection, the sock sleeve is pressed outward from each part, thereby more effectively preventing the material from overflowing to the outside of the sock, and at the same time, After the material in the guiding groove is solidified, the rib-like mesh structure of the sole is formed, and in the case of the same sole thickness, the gravity of the sole is reduced, and the material is saved.

Preferably, the flow guiding groove comprises longitudinal grooves and lateral grooves which intersect each other, and correspondingly, the protrusions of the bottom surface of the die are vertically and horizontally aligned for good support.

Preferably, the bottom of the clamping die is provided with an exhaust port, whereby the air in the cavity can be discharged from the exhaust port with the filling of the material in the cavity during the first injection.

The injection molding method for a shoe according to the present invention may employ any one of the above molds, and the mold used includes a die, an outer mold, and a injection nozzle, the outer mold including a matching mold and a first bottom mold, the mold a bottom of the bottom mold is provided with a concave injection groove, the first bottom mold is provided with a nozzle through hole corresponding to the injection groove, and a stocking corresponding to the injection groove is opened on the sock a hole, the sleeve is sleeved on the ram, after the mold is closed, the injection nozzle extends through the injection hole into the injection tank, and the molten plastic material is injected through the injection nozzle The injection trough is such that the shaping material presses the sock from the inner side of the sock over the inner surface of the outer mold until the plastic material fills the cavity.

Preferably, the injection trough is a cylindrical trough, the injection nozzle adopts a circular tube shape, and a circular annular gap is left between the injection trough and the injection nozzle, and the material is injected through the injection nozzle. The material flows out evenly from the injection groove from the annular gap between the injection tank and the injection nozzle.

Preferably, the outer mold further comprises one or more subsequent sole injection bottom molds matched with the clamping mold, and in the first injection using the first bottom mold, integrally forming the upper and the first layer sole, and then A subsequent sole is injected into the bottom mold to form a multi-layer composite sole structure in which a portion corresponding to the sole is sandwiched in the multi-layer composite sole structure.

Preferably, the bottom surface of the die is provided with a plurality of mutually communicating flow guiding grooves, wherein the flow guiding grooves have a discontinuous convex structure, and the guiding grooves and the injection groove Connected, the material in the flow guiding groove is solidified to form a rib-like mesh structure of the sole.

Preferably, the flow guiding groove comprises longitudinal grooves and lateral grooves which intersect each other, and correspondingly, the protrusions of the bottom surface of the die are vertically and horizontally aligned to optimize the rib mesh structure of the sole to improve the service life and Prevent deformation.

Preferably, the bottom of the clamping mold is provided with an exhaust port, and in the first injection, in the cavity Air is exhausted from the exhaust port.

The preferred and optional technical means disclosed in the present invention can be combined in any combination to form a plurality of different technical solutions, unless otherwise specified, and a preferred or optional technical means is further defined by another technical means.

Claims

An injection molding die for a shoe, comprising: a die, an outer die, a injection nozzle and a corresponding opening and closing die mechanism, the outer die comprising a clamping die and a first bottom die, the bottom of the die is provided a concave injection groove, the first bottom mold is provided with a nozzle through hole opposite to the position of the injection groove, and after the mold clamping, the injection nozzle passes through the injection nozzle hole, and the inner end Located in the injection tank, the outer end is located outside the outer mold.
The mold of claim 1 wherein said outer mold further comprises one or more subsequent sole injection bottom molds associated with said jaws.
The mold according to claim 2, wherein said injection groove is a cylindrical groove, said injection nozzle has a circular tube shape, and a circular gap is left between said injection groove and said injection nozzle.
The mold according to claim 1, 2 or 3, wherein the bottom surface of the die is provided with a plurality of mutually communicating flow guiding grooves, and the flow guiding grooves have a discontinuous convex structure. The flow guiding groove is in communication with the injection groove.
A mold according to claim 4, wherein said flow guiding groove comprises longitudinal grooves and lateral grooves which intersect each other, and projections of said bottom surface of said mold are vertically and horizontally aligned, and said bottom of said mold is provided with rows Air port.
A method for injection molding a shoe, the mold used comprising a die, an outer die and a injection nozzle, the outer die comprising a clamping die and a first bottom die, the bottom of the die being provided with a concave note a trough, the first bottom mold is provided with a nozzle through hole corresponding to the injection trough, and a soaking hole corresponding to the injection trough is opened on the sock, and the sock is sleeved in the a mold, after the mold is closed, the injection nozzle extends through the injection hole into the injection tank, and the molten plastic material is injected into the injection tank through the injection nozzle to shape The material is pressed from the inner side of the sock over the inner surface of the outer mold until the plastic material fills the cavity.
The method of claim 6 wherein said outer mold further comprises one or more subsequent sole injecting bottom molds associated with said jaws, integrally formed during the first injection using said first bottom mold The upper and the first layer of sole are then infused into the bottom mold with a subsequent sole to form a multi-layer composite sole structure in which a portion corresponding to the sole is sandwiched in the multi-layer composite sole structure.
The method according to claim 7, wherein said injection groove is a cylindrical groove, said injection nozzle adopts a circular tube shape, and a circular gap is left between said injection groove and said injection nozzle. During the injection of the material through the injection nozzle, the material flows out uniformly from the injection groove from the annular gap between the injection tank and the injection nozzle.
The method according to claim 6, 7 or 8, wherein the bottom surface of the die is provided with a plurality of mutually communicating flow guiding grooves, and the flow guiding grooves have a discontinuous convex structure. The flow guiding groove is in communication with the injection groove, and the material in the flow guiding groove is solidified to form a rib-like mesh structure of the sole.
The method according to claim 9, wherein said flow guiding groove comprises longitudinal grooves and lateral grooves which intersect each other, said protrusions of said bottom surface of said mold are vertically and horizontally aligned, and said bottom of said mold is provided with rows At the port, the air in the cavity is discharged from the exhaust port during the first injection.