阅读说明：本技术 复合型穿孔pu灌注鞋模具及其生产方法 (Composite perforated PU (polyurethane) shoe pouring mold and production method thereof ) 是由 李玉才 王操 陈实 骆娜 于 2021-07-27 设计创作，主要内容包括：复合型穿孔PU灌注鞋模具及其生产方法,由底模、边框、铝楦和填芯组成,铝楦固定在边框内部,边框包括内边框和外边框,橡胶底片置于底模顶部的卡槽中,外边框通过外侧的轴套与底模侧面相连,内边框和外边框之间通过轴套相连,内边框和外边框的相对的内壁上设置若干用来固定填芯的定位柱,填芯顶设置聚四氟乙烯盖板。本发明通过模内一体灌注成型结构,不使用TPU气囊,大大降低了复合型穿孔PU鞋的制作成本,同时内置填芯采用的是低密度的发泡聚氨酯材料在重量上也会比普通的穿孔结构轻,鞋底一体灌注各部件吻合度高,产品外观更加整洁漂亮。(The compound perforated PU injection shoe mold comprises a bottom mold, a frame, an aluminum last and a filling core, wherein the aluminum last is fixed inside the frame, the frame comprises an inner frame and an outer frame, a rubber bottom sheet is arranged in a clamping groove at the top of the bottom mold, the outer frame is connected with the side surface of the bottom mold through a shaft sleeve at the outer side, the inner frame and the outer frame are connected through the shaft sleeve, a plurality of positioning columns for fixing the filling core are arranged on the opposite inner walls of the inner frame and the outer frame, and a polytetrafluoroethylene cover plate is arranged at the top of the filling core. According to the invention, the in-mold integrated injection molding structure is adopted, a TPU air bag is not used, the manufacturing cost of the composite perforated PU shoe is greatly reduced, meanwhile, the built-in filling core is made of a low-density foamed polyurethane material, the weight of the composite perforated PU shoe is lighter than that of a common perforated structure, the matching degree of integrally injected parts of the sole is high, and the appearance of the product is cleaner and more beautiful.)

1. The utility model provides a compound perforation PU fills shoe mold, characterized by comprises die block, frame, aluminum last and the core of filling, and the aluminum last is fixed inside the frame, and the frame includes interior frame and outline, and the rubber film is arranged in the draw-in groove at die block top, and the outline passes through the axle sleeve in the outside and links to each other with the die block side, links to each other through the axle sleeve between interior frame and the outline, sets up a plurality of reference columns that are used for fixed core of filling on the relative inner wall of interior frame and outline, and the core top of filling sets up the polytetrafluoroethylene apron.

2. The compound perforated PU injection shoe mold according to claim 1, wherein a handle is disposed on the side surface of the bottom mold.

3. The compound perforated PU injection shoe mold of claim 1, wherein a handle is provided at the end of the inner frame.

4. A composite perforated PU slip shoe mold according to claim 1, wherein the core is made of a low density foamed polyurethane material.

5. A production process of a composite perforated PU (polyurethane) injection shoe is characterized in that a rubber bottom sheet at the bottom is manufactured, the manufactured rubber bottom sheet is placed into a bottom die, the rubber bottom sheet is fixed on the bottom die through clamping grooves on a periphery, meanwhile, the problem of material overflow is solved, then a core filling die is manufactured through the built-in core filling die, the manufactured core filling die is clamped through positioning columns of an inner frame and an outer frame, a manufactured TPU supporting sheet is fixed on the core filling die arranged in the frame, a polytetrafluoroethylene cover plate is placed to fix the supporting sheet TPU so as to prevent PU material from flowing into a through hole, the other end of the polytetrafluoroethylene cover plate is tightly matched with the bottom die, the PU material is prevented from flowing into the rubber bottom sheet in the die assembly process, and finally, the PU material is poured and die assembly is started to finish the product manufacturing.

Technical Field

The invention relates to the technical field of shoemaking equipment, in particular to a compound perforated PU (polyurethane) shoe pouring mold and a production method thereof.

Background

The existing sole can be made of different materials such as EVA (ethylene vinyl acetate), PVC (polyvinyl chloride), PU (polyurethane), CPU (Central processing Unit), TPU (thermoplastic polyurethane), the air permeability, the cushioning, the stability and the protection performance are all factors for measuring whether the sole is outstanding or not and can not be ignored, the cushioning performance of the sole can be obviously improved by a perforated structure of the sole, but the common perforated structure of PU shoes on the market at present adopts an air bag type TPU (thermoplastic polyurethane) accessory structure, and the sole is manufactured by adopting an adhesive process. The manufacturing process comprises the following steps: the cost of the sole is very high due to the particular structure of the bladder; the production process is complicated, such as glue brushing, bottom combining and finishing; the artificial combined shoe sole has the advantages of differentiation, deformation, non-uniform size, glue failure and other quality problems, in addition, the production flow is complex, the environment is not protected, and the glue brushing process is polluted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a composite perforated PU (polyurethane) shoe pouring mold and a production method thereof.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a compound perforation PU fills shoe mold, comprises die block, frame, aluminum last and the core of packing, and the aluminum last is fixed inside the frame, and the frame includes interior frame and outline, and the rubber film is arranged in the draw-in groove at die block top, and the outline passes through the axle sleeve in the outside and links to each other with the die block side, links to each other through the axle sleeve between interior frame and the outline, sets up a plurality of reference columns that are used for fixed core of packing on the relative inner wall of interior frame and outline, and the core of packing top sets up the polytetrafluoroethylene apron.

And a handle is arranged on the side surface of the bottom die.

The end part of the inner frame is provided with a handle.

The filling core is made of low-density foaming polyurethane material.

A production process of a composite perforated PU (polyurethane) injection shoe comprises the steps of preparing a rubber bottom sheet at the bottom, putting the prepared rubber bottom sheet into a bottom die, fixing the rubber bottom sheet on the bottom die through a clamping groove on a periphery, solving the problem of material overflow, preparing a filling core through a built-in core filling die, clamping the prepared filling core through positioning columns of an inner frame and an outer frame, fixing the prepared TPU support sheet on the filling core arranged in the frame, putting a polytetrafluoroethylene cover plate to fix the TPU support sheet to prevent PU from flowing into a through hole, tightly matching the other end of the polytetrafluoroethylene cover plate with the bottom die, avoiding PU from flowing into the rubber bottom sheet in the process of die assembly, and finally starting to fill PU material to complete product preparation.

The invention firstly fixes the prepared TPU accessory on the built-in filling core, then puts the polytetrafluoroethylene accessory to fix the TPU accessory to prevent PU from flowing into the through hole, the other end of the polytetrafluoroethylene accessory is tightly matched with the bottom die, and the PU is prevented from flowing into the rubber bottom in the die assembly process, so that the problem of punching and material overflowing is solved without increasing the cost.

According to the invention, the in-mold integrated injection molding structure is adopted, a TPU air bag is not used, the manufacturing cost of the composite perforated PU shoe is greatly reduced, meanwhile, the built-in filling core is made of a low-density foamed polyurethane material, the weight of the composite perforated PU shoe is lighter than that of a common perforated structure, the matching degree of integrally injected parts of the sole is high, and the appearance of the product is cleaner and more beautiful.

Description of the drawings:

the invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the mold of the present invention;

FIG. 2 is a sectional view showing the mold of the present invention in a clamped state.

In the figure, a bottom die 1, an inner frame 2, an outer frame 3, an aluminum shoe last 4, a shaft sleeve 5, a rubber bottom plate 6, a core 7, a polytetrafluoroethylene cover plate 8, a positioning column 9, a TPU supporting sheet 10, a handle 11 and a clamping groove 12 are shown.

The specific implementation mode is as follows:

as shown in fig. 1 and 2, a compound perforated PU injection shoe mold comprises a bottom mold 1, a frame, an aluminum last 4 and a filler 7, wherein the aluminum last 4 is fixed inside the frame, the frame comprises an inner frame 2 and an outer frame 3, a rubber bottom sheet 6 is arranged in a clamping groove 12 at the top of the bottom mold 1, the outer frame 3 is connected with the side surface of the bottom mold 1 through a shaft sleeve 5 at the outer side, the inner frame 2 and the outer frame 3 are connected through the shaft sleeve, a plurality of positioning columns 9 for fixing the filler 7 are arranged on the inner walls of the inner frame and the outer frame, and a polytetrafluoroethylene cover plate 8 is arranged at the top of the filler 7.

The side surface of the bottom die is provided with a handle 11. The end part of the inner frame is provided with a handle. The filling core is made of low-density foaming polyurethane material.

A production process of a composite perforated PU (polyurethane) injection shoe comprises the steps of preparing a rubber bottom sheet at the bottom, putting the prepared rubber bottom sheet into a bottom die, fixing the rubber bottom sheet on the bottom die through a clamping groove on a periphery, solving the problem of material overflow, preparing a filling core through a built-in core filling die, clamping the prepared filling core through positioning columns of an inner frame and an outer frame, fixing a prepared TPU (thermoplastic polyurethane) supporting sheet 10 on the filling core arranged in the frame, putting a polytetrafluoroethylene cover plate to fix the TPU supporting sheet 10 to prevent PU material from flowing into a through hole, enabling the other end of the polytetrafluoroethylene cover plate to be tightly matched with the bottom die, preventing the PU material from flowing into the rubber bottom sheet in the die assembly process, and finally starting to inject PU material to perform die assembly to complete product manufacturing.

The invention firstly fixes the prepared TPU accessory on the built-in filling core, then puts the polytetrafluoroethylene accessory to fix the TPU accessory to prevent PU from flowing into the through hole, the other end of the polytetrafluoroethylene accessory is tightly matched with the bottom die, and the PU is prevented from flowing into the rubber bottom in the die assembly process, so that the problem of punching and material overflowing is solved without increasing the cost.