Novel shoe tree for injection molding of shoe with upper

Abstract

The novel shoe tree comprises a bottom die and a shoe tree body, a shoe sole die is arranged in the middle of the bottom die, the shoe tree body is correspondingly arranged above the shoe sole die, a feeding port is formed in the upper portion of the rear side of the shoe tree body, and a first feeding port and a second feeding port are arranged in the feeding port. A first discharging port and a second discharging port are formed in the front side and the rear side of the bottom of the shoe tree body respectively, a first straight-through type communicating pipe body is arranged between the first feeding port and the first discharging port, and a second straight-through type communicating pipe body is arranged between the second feeding port and the second discharging port. The first discharge port and the second discharge port are formed in the front side and the rear side of the shoe tree body and are communicated with the first feed port and the second feed port through the first straight-through communication pipe body and the second straight-through communication pipe body, so that the high-temperature characteristic of an injection molding material can be ensured during injection molding, the flowing speed is increased, the adhesion degree is increased, and the service life of the injection molding material is prolonged. The effects of improving the injection molding efficiency and quality are achieved; the device is novel in structure, ingenious in design and suitable for popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of shoe sole injection molding, in particular to a novel shoe last for injection molding of upper shoes. Background Art

[0002] There are many kinds of materials for soles. The soles of many sports shoes are made of PVC plastic TPR elastomer. The PVC plastic TPR elastomer soles need to go through the injection molding process during production. The existing injection molding method usually uses a disc-structured continuous sole injection molding machine for batch sole injection molding. The main injection molding components include the bottom mold, the shoe last, and the middle frame mold. The current shoe last is equipped with a material channel from the top to the bottom. However, the conventional horizontal injection molding shoe machine is to inject the material horizontally from the end face of the bottom mold frame, which is not suitable for the existing In order to solve the problem of internal injection shoe mold, a method of injecting materials through a shoe last has appeared on the market. Injection molding is performed by setting interconnected injection inlets and outlets on the rear side and bottom of the shoe last. Such a structure is prone to a problem in actual use. Since the injection molding material is high-temperature, it takes a certain amount of time to injection-mold from the injection molding outlet in the middle of the shoe last to the front and rear sides of the sole. In this process, the temperature of the injection molding material will decrease, thereby affecting the injection molding quality. In addition, a single injection molding outlet also makes the injection molding efficiency low, affecting production efficiency. In view of this, the inventor proposes a new type of shoe last for injection molding of connected upper shoes to solve the above problems. By setting injection molding channels on the front and rear sides of the shoe last, dual-channel injection molding is achieved to avoid loss of temperature of the injection molding material and improve production efficiency.

[0003] In order to better connect the injection molded shoe last with the external injection mechanism and to facilitate feeding, thereby achieving faster and better injection molding, a Chinese patent (authorization announcement number: CN217597677U) discloses a horizontal injection molded shoe last. The utility model includes a shoe last body arranged on a bottom mold, and a material channel is arranged in the shoe last body. The upper end of the material channel is connected to the upper part of the rear end of the shoe last, and the lower end is connected to the bottom surface of the shoe last body. A feeding table connected to the external injection mechanism is fixedly arranged on the upper part of the rear end of the shoe last body, and a feeding hole connected to the material channel is opened on the feeding table, which has the advantage of easy operation.

[0004] This solution still has some shortcomings in application. Since the injection molding material is injected under high temperature and the temperature has a great influence on the quality of injection molding, if a single channel is used for injection molding, the injection molding material will lose a certain temperature during the period when it flows from the middle of the shoe last to the front and back sides of the shoe mold, which will affect the injection molding quality. At the same time, the use of a single channel structure will also reduce the injection molding efficiency, which is not conducive to enterprise production. Therefore, it is necessary to improve the structure of the injection molding shoe last so that it can maintain the temperature of the injection molding material to the maximum extent and improve the injection molding efficiency. Utility Model Content

[0005] The utility model discloses a novel shoe last for injection molding of upper shoes, the main purpose of which is to overcome the above-mentioned deficiencies and shortcomings of the prior art.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A new type of shoe last for injection molding of upper shoes, comprising a bottom mold and a last body, a sole mold with an opening facing upward is provided in the middle of the bottom mold, the last body is correspondingly arranged above the sole mold and can move up and down, a feed port is provided at the upper rear part of the last body, a first feed port and a second feed port are built in the feed port, a first discharge port and a second discharge port are respectively provided at the front and rear sides of the bottom of the last body, a first straight-through connecting pipe body is provided between the first feed port and the first discharge port, and a second straight-through connecting pipe body is provided between the second feed port and the second discharge port.

[0008] Furthermore, a positioning sliding plate and a top rod are respectively provided on the top of the shoe last body, and the top rod is provided with a fixing bolt.

[0009] Furthermore, the front and rear sides of the bottom of the shoe last are respectively provided with grooves, the grooves are detachably provided with a discharge block, the discharge block is provided with a discharge pipe, and the discharge pipe is connected with the first discharge port and the second discharge port.

[0010] Furthermore, the front side and the rear side of the bottom mold are respectively provided with injection channels, and the injection channels are arranged correspondingly to the discharge pipe.

[0011] Furthermore, the feed port is provided with a cylindrical injection block, and the shoe last body can be fastened and connected with an external injection mechanism through the injection block.

[0012] Furthermore, a cooling exhaust hole is provided on one side of the feed inlet.

[0013] It can be seen from the above description of the utility model that, compared with the prior art, the advantages of the utility model are:

[0014] The utility model firstly sets the first discharge port and the second discharge port respectively through the front side and the rear side of the shoe last body, and the first discharge port and the second discharge port are connected with the first feed port and the second feed port through the first straight-through connecting tube body and the second straight-through connecting tube body. Compared with the existing single-channel structure, the flow time of the injection molding material is shortened by this setting, and the temperature of the injection molding material can be guaranteed to the maximum extent, the molding speed is increased, the bonding degree is improved, and the injection molding quality is improved; then, the first feed port and the second feed port are arranged up and down and are both arranged at the same feed port, and the injection molding material is injected from the first feed port and the second feed port at the same time, so that the front and rear sides of the sole are simultaneously injected, and the injection molding efficiency is effectively improved; finally, for some soles with a longer length, a discharge port can be added at the bottom of the shoe last body, and the setting of multi-point discharge can make the injection molding material flow faster, and its bonding degree will be improved when the temperature is kept relatively good. The utility model has a novel structure and a clever design, can improve the injection molding quality and efficiency, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side structural schematic diagram of the utility model.

[0016] Figure 2 It is a rear structural schematic diagram of a shoe last body of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the shoe last of the utility model when viewed from above. Figure 1 (dual channel).

[0018] Figure 4 This is a schematic diagram of the structure of the shoe last of the utility model when viewed from above. Figure 2 (three channels). DETAILED DESCRIPTION

[0019] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0020] like Figures 1 to 4 As shown, a new type of shoe last for injection molding of connected upper shoes includes a bottom mold 1 and a last body 2, wherein a sole mold 3 with an opening facing upward is provided in the middle of the bottom mold 1, and the last body 2 is correspondingly arranged above the sole mold 3 and can move up and down, and a feed port 4 is provided at the upper rear part of the last body 2, and the feed port 4 has a first feed port 41 and a second feed port 42 arranged up and down therein, and a first discharge port 21 and a second discharge port 22 are respectively provided at the front and rear sides of the bottom of the last body 2, a first straight connecting pipe body 5 is provided between the first feed port 41 and the first discharge port 42, and a second straight connecting pipe body 6 is provided between the second feed port 42 and the second discharge port 22.

[0021] Furthermore, a positioning sliding plate 23 and a top rod 24 are respectively provided on the top of the shoe last body 2 , and the top rod 24 is provided with a fixing bolt 25 .

[0022] Furthermore, the front and rear sides of the bottom of the shoe last body 2 are respectively provided with grooves, and the grooves are detachably provided with a discharge block 7, and the discharge block 7 is provided with a discharge pipe 8, and the discharge pipe 8 is connected to the first discharge port 21 and the second discharge port 22.

[0023] Furthermore, the front and rear sides of the bottom mold 1 are correspondingly provided with injection channels 9 , and the injection channels 9 are correspondingly provided with the discharge pipe 8 .

[0024] Furthermore, the feed port 4 is provided with a cylindrical injection block 10 , and the shoe last body 2 can be fastened and connected with an external injection mechanism through the injection block 10 .

[0025] Furthermore, a cooling exhaust hole 11 is provided on one side of the feed port 4 .

[0026] [Example 1]

[0027] First, the shoe last body 2 is fixed on the turntable of the upper and sole injection molding machine (existing machinery) through the positioning sliding plate 23 and the push rod 24 on the top of the shoe last body 2, and at the same time, the shoe last body 2 is fastened and connected with the external injection mechanism through the injection block 10, the shoe last body 2 is embedded in the bottom mold 1 and the discharge pipe 8 is connected with the injection channel 9 of the bottom mold 1, then, the injection material enters through the feed port 4 and flows through the first feed port 41 and the second feed port 42 along the first straight connecting pipe body 5 and the second connecting pipe body 6 to the first discharge port 21 and the second discharge port 22 and finally to the discharge pipe 8, and the injection material then flows to the front and rear sides of the bottom mold 1 through the discharge pipe 8 for injection molding, and finally, after the injection molding is completed, the cooling exhaust hole 11 is connected to the external cooling equipment for cooling.

[0028] [Example 2]

[0029] Since foreigners have longer feet, some of them need to wear size 48 shoes, so the soles are also required to be longer. A third discharge port 12 is added in the middle of the bottom of the shoe last 2, so that the injection molding material can reach the bottom of the shoe last 2 from the feed port 4 faster and has better fluidity.

[0030] It can be seen from the above description of the utility model that, compared with the prior art, the advantages of the utility model are:

[0031] The utility model firstly sets the first discharge port and the second discharge port respectively through the front side and the rear side of the shoe last body, and the first discharge port and the second discharge port are connected with the first feed port and the second feed port through the first straight-through connecting tube body and the second straight-through connecting tube body. Compared with the existing single-channel structure, the flow time of the injection molding material is shortened by this setting, and the temperature of the injection molding material can be guaranteed to the maximum extent, the molding speed is increased, the bonding degree is improved, and the injection molding quality is improved; then, the first feed port and the second feed port are arranged up and down and are both arranged at the same feed port, and the injection molding material is injected from the first feed port and the second feed port at the same time, so that the front and rear sides of the sole are simultaneously injected, and the injection molding efficiency is effectively improved; finally, for some soles with a longer length, a discharge port can be added at the bottom of the shoe last body, and the setting of multi-point discharge can make the injection molding material flow faster, and its bonding degree will be improved when the temperature is kept relatively good. The utility model has a novel structure and a clever design, can improve the injection molding quality and efficiency, and is suitable for promotion.

[0032] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial improvement of the utility model using this concept should be regarded as an infringement of the protection scope of the utility model.

Claims

1. A new type of shoe last for injection molding of upper shoes, characterized in that: It includes a bottom mold and a shoe last body, wherein a sole mold with an opening facing upward is provided in the middle of the bottom mold, the shoe last body is correspondingly arranged above the sole mold and can move up and down, a feed port is provided at the upper rear side of the shoe last body, and a first feed port and a second feed port arranged up and down are built in the feed port, a first discharge port and a second discharge port are respectively provided at the front and rear sides of the bottom of the shoe last body, a first straight-through connecting pipe body is provided between the first feed port and the first discharge port, and a second straight-through connecting pipe body is provided between the second feed port and the second discharge port.

2. A new type of shoe last for injection molding of upper shoes according to claim 1, characterized in that: The top of the shoe last body is respectively provided with a positioning sliding edge plate and a push rod, and the push rod is provided with a fixing bolt.

3. The novel shoe last for injection molding of upper shoes according to claim 1, characterized in that: The front side and the rear side of the bottom of the shoe last are respectively provided with grooves, and the grooves are detachably provided with a discharge block, and the discharge block is provided with a discharge pipe, and the discharge pipe is connected with the first discharge port and the second discharge port.

4. A new type of shoe last for injection molding of upper shoes according to claim 3, characterized in that: The front side and the rear side of the bottom mold are correspondingly provided with injection channels, and the injection channels are correspondingly arranged with the discharge pipe.

5. The novel shoe last for injection molding of upper shoes according to claim 1, characterized in that: The feed port is provided with a cylindrical injection block, and the shoe last body can be fastened and connected with an external injection mechanism through the injection block.

6. The novel shoe last for injection molding of upper shoes according to claim 1, characterized in that: A cooling exhaust hole is provided on one side of the feed inlet.

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