CN117984474A - Sole mould with conformal waterway, use method and manufacturing method thereof - Google Patents

Abstract

The invention relates to the technical field of shoemaking moulds, and provides a sole mould with a conformal waterway, which comprises a pressing plate, an upper mould, a lower mould and a bottom plate; the pressing plate is connected with the upper die, and the bottom plate is connected with the lower die; the upper die and the lower die are mutually matched and form a die cavity, and the upper die is provided with a first circulation system for circulating a heating medium and a cooling medium; the lower die is provided with a second circulation system for circulating a heating medium and a cooling medium; the mold can uniformly and circularly heat/cool the product according to the trend of the waterway arranged on the shoe type, so that the circulation speed is increased, the circulation time of the mold is shortened, and the defect that the plastic is generated due to uneven temperature circulation is reduced. The use method uses the sole mould, and the production efficiency is improved by reasonably adjusting the temperature of the mould; according to the manufacturing method, the waterway and the die are integrally formed by 3D printing, so that the cooperative performance of the waterway and the die is further improved, and the heating and cooling efficiency is further improved.

Description

Sole mould with conformal waterway, use method and manufacturing method thereof

Technical Field

The invention relates to the technical field of shoemaking moulds, in particular to a sole mould with a conformal waterway, a use method and a manufacturing method thereof.

Background

The use of dies in modern manufacturing is very widespread, and the use of dies is required for the forming process of almost all product components. Therefore, the mould industry is an important component of the national high and new technology industry and is also a precious technical resource.

In the shoe making industry, the soles are produced by using a hot-press forming die, and the functions of rapid transmission, cooling, heating and the like in the production process can be realized by reasonably designing a waterway system of the die, so that the production rhythm is accelerated, the production period is shortened, and the production efficiency is improved.

CN201711410760.X discloses a sole mold for integrally forming a large and medium sole, which comprises a rubber upper mold, a rubber middle plate, two common bottom molds, a shaping mold middle frame and a shaping mold upper mold; the middle frame of the sizing die is hinged with the upper die of the sizing die; the common bottom die, the middle frame of the sizing die and the upper die of the sizing die are respectively provided with a circulating water channel, and a water inlet and a water outlet of the circulating water channel of the middle frame of the sizing die are arranged at two sides of the middle frame of the sizing die; the upper die of the shaping die and the common bottom die circulating waterway are communicated with the middle frame circulating waterway of the shaping die; the circulating waterways in the common bottom die and the middle frame of the shaping die flow through the edge of the finished product area of the sole, and the circulating waterways in the upper die of the shaping die flow through the middle part of the inner core of the sole and the template.

The sole mould with the patent application number of CN201711410760.X is designed with a circulating waterway around the edge of a mould cavity, and can achieve a certain cooling effect, so that the production rhythm is accelerated, the production period is shortened, and the production efficiency is improved.

CN201710305430.8 discloses a sole mold comprising a lower mold unit and an upper mold unit, a heating unit for heating, and a control unit. The lower die unit comprises a lower die core group which is provided with a die cavity and is made of porous materials. The lower die core group is provided with at least one loop for guiding a heating medium or a cold air flow. The upper die unit comprises an upper die core which is matched with the die cavity and is displaced by a compression distance relative to the die cavity. The upper mold core is made of porous material and has one runner for guiding heating medium or cold air flow. The control unit is used for controlling the compression distance of the upper die core to be in direct proportion to the temperature of the upper die core and the lower die core of the die core group, and controlling the heating medium or the cold air flow to be discharged from the outlet of the loop and the outlet of the runner respectively in the first stage, and to be overflowed from the pores of the porous material in the second stage. Therefore, the temperature rising rate and the temperature reducing rate are controlled, and the quality of the finished product is improved.

The sole mould with the patent application number of CN201710305430.8 is provided with a loop or a runner for introducing heating medium and cold air flow in the upper mould unit and the lower mould unit, and the purpose of heating the mould or cooling the mould can be realized by controlling the heater. In addition, the porous material can enable the heating medium or the cold air flow to be rapidly discharged from the outlet or overflowed from the pores, so that the heating rate or the cooling rate is controlled, and the heating or cooling uniformity and the quality of a finished product are improved. However, as can be seen by combining the drawings, the waterway is still arranged around the die cavity, and is far away from the die cavity, the temperature of the die is mainly controlled by the heater, and the cooling of the die still has regionality, so that the formed sole is difficult to uniformly cool, and the cooling efficiency is low.

In addition, when the sole is formed by hot pressing, if the forming temperature is too high, the flowability of the material is affected, so that the material is difficult to fill in a mold and difficult to form. If the temperature is too low or the heat preservation time of the product is insufficient, the defect of incomplete curing can occur.

Based on the above, the technical problems to be solved in the scheme are as follows: how to solve the problems of slow production rhythm, long production period, low production efficiency and poor production quality of the existing sole mould.

Disclosure of Invention

In order to solve the technical problems, the invention provides the sole mould with the conformal waterway, which can uniformly and circularly heat/cool products according to the trend of the waterway arranged on the shoes, so that the circulation speed is increased, the circulation time of the mould is shortened, and the defect of uneven temperature circulation of plastic is reduced. The use method reasonably uses the sole mould, and the temperature of the mould is controlled within a set range by adjusting the temperature of the mould, so that the production efficiency is further improved; according to the manufacturing method, the waterway and the die are integrally formed by 3D printing, and compared with the conventional method for manufacturing a simple waterway only by milling holes, the cooperation performance of the waterway and the die can be further improved, and the heating and cooling efficiency is further improved.

The technical scheme of the invention is as follows:

A sole mould with a conformal waterway comprises a pressing plate, an upper mould, a lower mould and a bottom plate; the pressing plate is connected with the upper die, and the bottom plate is connected with the lower die; the upper die and the lower die are mutually matched and form a die cavity, and the upper die is provided with a first circulation system for circulating a heating medium and a cooling medium; the lower die is provided with a second circulation system for circulating a heating medium and a cooling medium;

The first circulating system comprises a first inlet channel, a first return channel and a first outlet channel which are communicated in sequence; the first inflow channel is used for inputting a heating medium and a cooling medium; the first return flow passage is arranged right above the die cavity and is close to the inner side of the formed sole; the first outflow channel is used for outputting heating medium and cooling medium;

the second circulation system comprises a second inlet channel, a second return channel, an outer Zhou Liudao and a second outlet channel which are communicated in sequence; the second inflow channel is used for inputting a heating medium and a cooling medium; the second return flow passage is arranged right below the die cavity and is close to the outer surface of the formed sole; the peripheral runner is arranged around the periphery of the die cavity and is close to the periphery of the formed sole; the second outflow channel is used for outputting heating medium and cooling medium;

the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is more than or equal to 0.6 and less than or equal to 0.8;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is more than or equal to 0.6 and less than or equal to 0.8.

The S1/S2 and S3/S4 include, but are not limited to, 0.6, 0.65, 0.7, 0.75 and 0.8.

In the sole mold with the conformal waterway,

The incision shape of the first return-type runner is a structure with a wide upper part and a narrow lower part, wherein the narrower part is close to the arc-shaped surface inside the formed sole;

And/or the number of the groups of groups,

The shape of the notch of the second return-type runner is a structure with a narrow upper part and a wide lower part, wherein the narrower part is close to the arc-shaped surface of the outer surface of the formed sole.

In the sole mold with the conformal waterway,

The path track of the first return-type flow channel is in an M shape, and the first inlet flow channel and the first outlet flow channel are respectively connected with the two ends of the first return-type flow channel in the M shape;

And/or the number of the groups of groups,

The path track of the second return flow channel is in an M shape, the second inlet flow channel is connected with one end of the second return flow channel in the M shape, one end of the outer Zhou Liudao is connected with the other end of the second return flow channel in the M shape, and the other end of the outer Zhou Liudao is connected with the second outlet flow channel; the path trajectories of the outer Zhou Liudao are equidistantly arranged along the peripheral contour of the mold cavity.

In the sole mold with the conformal waterway, the path tracks of the first and second loop-shaped runners are the same.

In the sole mold with the conformal waterway,

The first loop-shaped runner is arranged in the upper die; the first inlet runner is communicated with one end of the first return runner and extends to the side face of the pressing plate to form a first water inlet, and the first outlet runner is communicated with the other end of the first return runner and extends to the side face of the pressing plate to form a first water outlet;

And/or the number of the groups of groups,

The second return flow passage is arranged in the lower die; the second inlet runner is communicated with one end of the second return runner and extends to the side face of the bottom plate to form a second water inlet, and the second outlet runner is communicated with the other end of the second return runner and extends to the side face of the bottom plate to form a second water outlet.

In the sole mold with the conformal waterway,

The upper die is also provided with a plurality of first exhaust holes; the first exhaust holes are arranged along the first reverse flow channel;

And/or the number of the groups of groups,

A plurality of second exhaust holes are also formed in the lower die; the plurality of second exhaust holes are arranged along the second return flow passage.

A method for manufacturing a sole by adopting the sole mould according to any one of the above, which comprises the following steps in sequence:

Step 1, placing raw materials into a die cavity of a lower die, and then clamping an upper die and the lower die;

Step 2, respectively introducing heating media into the first circulation system and the second circulation system, wherein the pressure is P1, the P1 is more than or equal to 0.6Mpa and less than or equal to 1.5Mpa, the temperature of an upper die is increased to T1, the temperature of a lower die is increased to T2, and then the temperature is kept for 15-25 s, wherein the temperature of T1/T2 is more than or equal to 150 ℃ and less than or equal to 240 ℃;

Step 3, respectively introducing cooling media into the first circulation system and the second circulation system, wherein the pressure is P2, P2 is more than or equal to 0.6Mpa and less than or equal to 1.5Mpa, until the temperature of an upper die is reduced to T3, and the temperature of a lower die is reduced to T4, wherein the temperature of T3/T4 is more than or equal to 10 ℃ and less than or equal to 30 ℃;

step 4, opening the mould, separating the upper mould from the lower mould, and taking out the formed sole;

Wherein T1-T2 in the step 2 is less than or equal to +/-3 ℃, and T3-T4 in the step 3 is less than or equal to +/-3 ℃.

The above P1/P2 includes, but is not limited to, 0.6Mpa, 0.7Mpa, 0.8Mpa, 0.9Mpa, 1.0Mpa, 1.1Mpa, 1.2Mpa, 1.3Mpa, 1.4Mpa, 1.5Mpa; T1/T2 includes, but is not limited to, 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃; T3/T4 includes, but is not limited to, 10 ℃,12 ℃, 15 ℃, 18 ℃, 20 ℃, 22 ℃, 25 ℃, 28 ℃, 30 ℃; T1-T2/T3-T4 includes, but is not limited to, -3 ℃, -2 ℃, -1 ℃, 0 ℃,1 ℃,2 ℃,3 ℃.

In the method for manufacturing the sole, the heating rate of the upper die and the heating rate of the lower die in the step 2 are kept identical, and the cooling rate of the upper die and the cooling rate of the lower die in the step 3 are kept identical.

In the above-described method of making a shoe sole,

The temperature of the upper die in the step 2 is increased to T1, the temperature of the lower die is increased to T2, and then the temperature is kept for 10 to 22 seconds, wherein, the temperature of T1/T2 is more than or equal to 180 ℃ and less than or equal to 200 ℃, and P1 is more than or equal to 0.8Mpa and less than or equal to 1.2Mpa;

And 3, the upper die temperature is reduced to T3, and the lower die temperature is reduced to T4, wherein T3/T4 is more than or equal to 15 ℃ and less than or equal to 20 ℃, and P2 is more than or equal to 0.8Mpa and less than or equal to 1.2Mpa.

The T1/T2 includes but is not limited to 180 ℃, 185 ℃, 190 ℃, 195 ℃,200 ℃; P1/P2 includes, but is not limited to, 0.8MPa, 0.9MPa, 1.0MPa, 1.1MPa, 1.2MPa; T3/T4 includes, but is not limited to, 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃,20 ℃.

A method for manufacturing the sole mould according to any one of the above, wherein the method adopts a 3D printing technology to integrally form the upper mould or the lower mould; the method sequentially comprises the following steps:

step 1, performing three-dimensional design according to shoe shapes and shoe codes to generate a printing path;

Step 2, selecting a printing substrate with proper size, and sequentially printing layer by using 3D printing equipment to obtain an upper die or a lower die;

step 3, stress removal treatment is carried out on the upper die or the lower die;

and 4, respectively assembling an upper die, a pressing plate, a lower die and a bottom plate.

One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

The shoe type of the mold is provided with the trend of the waterway, so that products can be heated/cooled uniformly and circularly, the circulation speed is increased, the circulation time of the mold is shortened, the defects of plastic due to uneven temperature circulation are reduced, and the heat transfer efficiency is improved by reasonably designing the trend and the duty ratio of the runner; on the basis of the die, the use method improves the forming efficiency and the production benefit by optimizing parameters such as heating temperature, cooling temperature, pressure intensity, upper die temperature difference and lower die temperature difference, reduces energy consumption and enables the production process to be more environment-friendly; in addition, the invention integrally forms the water channel and the die by using 3D printing, thereby not only realizing the trend control of the flow channel, but also further improving the cooperative performance of the water channel and the die and further improving the heating and cooling efficiency.

Drawings

FIG. 1 is a schematic diagram of mold closing in accordance with example 1 of the present invention;

Fig. 2 is a schematic diagram of the upper die structure of embodiment 1 of the present invention;

FIG. 3 is a schematic view of the lower die structure of embodiment 1 of the present invention;

fig. 4 is a path diagram of the first and second return flow paths and the outer peripheral flow path in embodiment 1 of the present invention;

FIG. 5 is a path trace diagram of a first return flow channel, a second return flow channel and a peripheral flow channel according to comparative example 1 of the present invention;

fig. 6 is a path trace diagram of the first and second return flow paths and the outer peripheral flow path of comparative example 2 of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention, based on the embodiments herein.

Example 1

A sole mould with a conformal waterway comprises a pressing plate 1, an upper mould 2, a lower mould 3 and a bottom plate 4; the pressing plate 1 is connected with the upper die 2, and the bottom plate 4 is connected with the lower die 3; the upper die 2 and the lower die 3 are mutually matched to form a die cavity, and the upper die 2 is provided with a first circulation system 21 for circulating heating medium and cooling medium; the lower die 3 is provided with a second circulation system 31 for circulating heating water and cooling water;

The first circulation system 21 includes a first inlet channel 211, a first return channel 212, and a first outlet channel 213, which are sequentially connected; the first inlet channel 211 is used for inputting heating water and cooling water; the first return runner 212 is arranged right above the die cavity and is close to the inner side of the formed sole; the first outlet channel 213 is configured to output heating water and cooling water;

The second circulation system 31 includes a second inlet channel 311, a second return channel 312, an outer Zhou Liudao, 314, and a second outlet channel 313, which are sequentially connected; the second inlet channel 311 is used for inputting heating water and cooling water; the second return channel 312 is arranged right below the die cavity and is close to the outer surface of the formed sole; the outer Zhou Liudao 314 is disposed around the periphery of the mold cavity and proximate to the periphery of the molded sole; the second outlet channel 313 is used for outputting heating water and cooling water;

The projection area of the first loop-shaped runner 212 on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.6;

The projection area of the second loop-shaped runner 312 on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.6.

In this embodiment, the ratio of S1 to S2 or S3 to S4 reflects the ratio in the upper die 2 or the lower die 3, and of course, the ratio is fully reflected except the ratio of the projection area on the horizontal section, and the dimensions of the die are further described, and further description will be continued hereinafter; it should be noted that the sole of 36 yards is molded in this example, and the dimension of the sole mold after mold clamping is 470mm x 400mm x 170mm.

In addition, in this embodiment, the sole is made of EVA.

In this embodiment, the first loop-shaped flow channel 212 has a structure with a wider upper portion and a narrower lower portion, wherein the narrower portion is adjacent to the arc-shaped surface of the inner surface of the molded sole; the second return flow channel 312 has a slit shape with a narrow upper and a wide lower, wherein the narrower portion is adjacent to the arc surface of the outer surface of the molded sole.

Since the upper die 2 is a male die and the lower die 3 is a female die, the volume of the male die is obviously larger than that of the female die, so that the energy required for the upper die 2 is larger than that required for the lower die 3 when heating/cooling the die cavity, and in order to keep the heating rate and cooling rate of the upper die 2 and the lower die 3 uniform, and to avoid the problems of unstable quality and low quality caused by uneven heating of the product in the die cavity, in this embodiment, it is further required to explain that the cross-sectional area of the notch of the first loop runner 212 is S5, and the cross-sectional area of the notch of the second loop runner 312 is S6, and in general, in order to keep the heating rate and cooling rate of the upper die 2 and the lower die 3 uniform, the S5 > S6 correspondingly. In the present embodiment, specifically, S5 is about 360mm2 and S6 is about 120mm2, and of course, the size of S5/S6 is positively correlated with the size of the mold itself, and also with the precision of the processing mold.

It should be further noted that the upper portion of the slit shape of the first return-type flow channel 212 is rectangular, and the lower portion is a gradually narrowing triangle-like shape; the upper part of the notch shape of the second return-type flow channel 312 is a gradually narrowed triangle-like shape, and the lower part is a rectangle with round corners at two sides; the upper part of the notch shape of the outer Zhou Liudao is a gradually narrowing triangle-like shape, and the lower part is a circular arc shape.

The reason for the above design is that the inner and outer surfaces of the sole are curved, and the heating rate and cooling rate are increased in order to make the first and second return channels 212, 312 closer to the inner/outer surfaces.

In this embodiment, the paths of the first and second loop-shaped runners 212, 312 are the same;

The path track of the first back flow channel 212 is in an "M" shape, and the first inlet flow channel 211 and the first outlet flow channel 213 are respectively connected with two ends of the "M" shaped first back flow channel 212;

The path track of the second return flow channel 312 is in an "M" shape, the second inlet flow channel 311 is connected to one end of the "M" shaped second return flow channel 312, one end of the outer Zhou Liudao is connected to the other end of the "M" shaped second return flow channel 312, and the other end of the outer Zhou Liudao is connected to the second outlet flow channel 313; the path trajectories of the outer Zhou Liudao s 314 are equidistantly arranged along the peripheral contour of the mold cavity.

It should be noted that, the path track of the "M" shape changes along the shoe shape, in practical application, the path track should be close to the molding surface as much as possible, and the distances from each point on the path track to the corresponding point on the molding surface are equal. Under the above design, the "M" shaped path track can increase the side surface area of the first loop-shaped flow channel 212/the second loop-shaped flow channel 312, thereby accelerating the heat exchange efficiency and increasing the production efficiency.

Specifically, the first loop-shaped runner 212 is disposed inside the upper die 2; the first inlet channel 211 is communicated with one end of the first return channel 212 and extends to the side surface of the pressing plate 1 to form a first water inlet, and the first outlet channel 213 is communicated with the other end of the first return channel 212 and extends to the side surface of the pressing plate 1 to form a first water outlet; the second loop 312 is disposed inside the lower die 3; the second inlet channel 311 is connected to one end of the second return channel 312 and extends to the side of the bottom plate 4 to form a second water inlet, and the second outlet channel 313 is connected to the other end of the second return channel 312 and extends to the side of the bottom plate 4 to form a second water outlet.

In this embodiment, preferably, the upper die 2 is further provided with a plurality of first vent holes 22; the plurality of first exhaust holes 22 are arranged along the first return flow passage 212; a plurality of first exhaust holes 22 are also arranged in the lower die 3; the plurality of second exhaust holes 32 are arranged along the second return flow path 312.

Under the above-mentioned preference, the first exhaust hole 22 and the first exhaust hole 22 enable the air flow to be exhausted and dissipated rapidly, so as to control the heating rate or cooling rate, and improve the heating or cooling uniformity and the quality of the finished product.

Example 2

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.7;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.7.

Example 3

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.8;

The projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.8.

Example 4

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.6;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.7.

Example 5

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.7;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.6.

Example 6

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.6;

The projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.8.

Example 7

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.8;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.6.

Comparative example 1

Substantially the same as in example 1, except that: turning over the path track of the first loop-shaped runner to enable the path tracks to be different, wherein the first loop-shaped runner is not close to the periphery of the formed sole; reference is made to fig. 5.

Comparative example 2

Substantially the same as in example 1, except that: the path track of the first loop-shaped runner and the path track of the second loop-shaped runner are changed, the projection areas of the first loop-shaped runner and the second loop-shaped runner on the horizontal section are kept the same as those of the embodiment 1, and the side surface area of the first loop-shaped runner/the second loop-shaped runner is increased by reducing the pipe diameter and increasing the bending, and refer to fig. 6.

Comparative example 3

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.9;

The projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.9.

Comparative example 4

Substantially the same as in example 1, except that: the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is approximately equal to 0.5;

The projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is approximately equal to 0.5.

Example 8

A method of making a sole using the sole mold of embodiment 1, comprising the steps of, in order:

Step 1, placing raw materials into a die cavity of a lower die, and then clamping an upper die and the lower die;

Step 2, heating water is respectively introduced into the first circulation system and the second circulation system, the pressure is P1 until the temperature of an upper die rises to T1, the temperature of a lower die rises to T2, and then the temperature is kept for 20s, wherein t1=160 ℃, t2=160 ℃, and p1=1 Mpa;

step 3, cooling water is respectively introduced into the first circulation system and the second circulation system, the pressure is p2=2.2 Kg/cm < 2 >, until the temperature of the upper die is reduced to T3, and the temperature of the lower die is reduced to T4, wherein, t3=20 ℃, t4=20 ℃, and p2=1 Mpa;

step 4, opening the mould, separating the upper mould from the lower mould, and taking out the formed sole;

the heating rate of the upper die and the heating rate of the lower die in the step 2 are kept consistent, and the cooling rate of the upper die and the cooling rate of the lower die in the step 3 are kept consistent;

It should be further noted that the temperatures of T1, T2, T3, and T4 are temperatures obtained by detecting the first outflow channel or the second outflow channel; in this embodiment, the temperature of the upper die and the lower die is adjusted by using the temperature controller of the cold and hot integrated die, which has the advantages that the temperature controller of the cold and hot integrated die can automatically change the flow rate according to the temperature to detect and adjust the temperature of the upper die and the lower die in real time, and of course, the volume of the runner of the upper die and the lower die of the die is different, so that the volume flow rate is accurately obtained due to the requirement of combining the properties of the medium in practical application, and the temperature of the upper die and the lower die is kept consistent.

Example 9

Substantially the same as in example 8, except that: in the step 2, t1=150 ℃, t2=150 ℃, and P1/p2=0.9 Mpa.

Example 10

Substantially the same as in example 8, except that: t1=180 ℃, t2=180 ℃, p1=1.2 Mpa in step 2, and p2=1.2 Mpa in step 3.

Example 11

Substantially the same as in example 8, except that: t1=240 ℃, t2=240 ℃, p1=1.2 Mpa in step 2, and p2=1.2 Mpa in step 3.

Example 12

Substantially the same as in example 8, except that: t1=180 ℃ and t2=183 ℃ in the step 3.

Example 13

Substantially the same as in example 8, except that: t1=183 ℃ and t2=180 ℃ in the step 3.

Example 14

Substantially the same as in example 10, except that: t3=30 ℃ and t4=30 ℃ in the step 3.

Example 15

Substantially the same as in example 10, except that: t3=15 ℃ and t4=15 ℃ in the step 2.

Example 16

Substantially the same as in example 10, except that: t3=10 ℃ and t4=10 ℃ in the step 2.

Example 17

Substantially the same as in example 10, except that: t3=15 ℃, t4=18 ℃ in step 2.

Example 18

Substantially the same as in example 10, except that: t3=18 ℃, t4=15 ℃ in step 2.

Comparative example 5

Substantially the same as in example 8, except that: t1=130 ℃ in the step 2, t2=130 ℃.

Comparative example 6

Substantially the same as in example 8, except that: t1=280 ℃ in the step 2, t2=280 ℃.

Comparative example 7

Substantially the same as in example 8, except that: t3=8 ℃ and t4=8 ℃ in the step 2.

Comparative example 8

Substantially the same as in example 8, except that: t3=35 ℃, t4=35 ℃ in the step 2.

Comparative example 9

Substantially the same as in example 8, except that: t1=180 ℃ and t2=185 ℃ in the step 2.

Comparative example 10

Substantially the same as in example 8, except that: t1=185 ℃ and t2=180 ℃ in the step 2.

Comparative example 11

Substantially the same as in example 8, except that: t3=15 ℃, t4=20 ℃ in the step 2.

Comparative example 12

Substantially the same as in example 8, except that: t3=20 ℃, t4=15 ℃ in the step 2.

Example 19

A method of making a sole mold according to any one of embodiments 1-7, the method integrally molding the upper or lower mold using 3D printing techniques; the method sequentially comprises the following steps:

step 1, performing three-dimensional design according to shoe shapes and shoe codes to generate a printing path;

Step 2, selecting a printing substrate with proper size, and sequentially printing layer by using 3D printing equipment to obtain an upper die or a lower die;

step 3, stress removal treatment is carried out on the upper die or the lower die;

and 4, respectively assembling an upper die, a pressing plate, a lower die and a bottom plate.

Performance test: 10 double soles were manufactured according to the parameters of each example, wherein the parameters of example 10 were used for each of examples 1 to 7 and comparative examples 1 to 5.

Table 1: sole case manufactured by each example

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Analysis of results:

In comparative examples 1 to 3, as the ratio of S1/S2, S3/S4 increases, the molding duration gradually shortens, obviously because the side surface area and the volume ratio of the first return flow channel/the second return flow channel are increased, thereby improving the heat transfer efficiency, but in combination with comparative example 3, when the ratio of S1/S2, S3/S4 reaches 0.9, a large amount of burrs appear in the molded sole, and the reason is presumed to be that the material strain is severe because the temperature change is too severe; in contrast, the ratio of S1/S2 to S3/S4 in comparative example 4 was only 0.5, and the edge warpage occurred in some cases during the mold test, because the volume ratio of the first mold runner/the second mold runner was too small, and the heat radiation range could not cover the entire mold, resulting in unstable heating/cooling.

In comparative example 3 and example 10, the molding duration of example 3 was shortened under the same process parameters, and in addition, in practical application, the energy consumption of example 3 was lower because of the larger ratio of S1/S2, S3/S4, the efficiency of heat transfer was improved, and the required temperature could be reached with less energy consumption.

In the process of mold test, the shoe soles of the embodiment 4 to the embodiment 7 can still be molded to be qualified, and the defect of the molded shoe soles caused by overlarge upper and lower temperature difference due to different upper and lower heat transfer efficiencies is avoided, but the efficiency is different.

The above results are combined with a large number of molds of examples 11 to 18, and it is considered that the molding efficiency of example 3 is the best and the most beneficial, and it is worth to be explained that, although the molding time period of example 11 is shorter, the energy consumption is higher, and the first return type runner/second return type runner is found to deform to different degrees after the molds are tested, because the introducing pressure is higher, and the strength requirement on the first return type runner/second return type runner is higher.

In comparative example 1, the path trace of the first loop-shaped flow channel was inverted to be different from the path trace of the second loop-shaped flow channel, and bubbles were generated in the molded sole of the test mold, which were caused by incomplete discharge of the gas inside the sole material and uneven temperature during the hot pressing process.

Comparative example 2 further increases the side surface area of the first/second loop-type flow channels in order to further improve heat transfer efficiency, but cannot be normally produced in an actual test mold because the conformal waterway manufactured by using the 3D printing technique has a limited strength, and is difficult to meet production requirements.

The heating temperature of comparative example 5 was too low to form a sole of acceptable quality, whereas the heating temperature of comparative example 6 was too high to cause material denaturation to break.

The cooling temperature of comparative example 7 was too low, and the molded sole of a part of cases was slightly cracked during the mold test, presumably due to the severe temperature change, whereas the cooling temperature of comparative example 8 was too high, and the molded sole of a part of cases was slightly bubbled during the mold test, presumably due to incomplete molding of the sole, and the gas inside the sole was not completely discharged, resulting in the generation of bubbles.

Comparative example 9 and comparative example 10, in which a small amount of micro bubbles appeared in the molded soles of some cases during the mold test, but it was found after observation that the bubbles of comparative example 9 were more located on the inner side of the soles, and the bubbles of comparative example 10 were more located on the outer side of the soles, presumably the cause was the directionality of heat radiation.

Comparative examples 11 and 12, in which edge warpage or curling occurred during the test, respectively, presumably caused causes similar to those of comparative examples 9 and 10 described above, except for the differences.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A sole mould with a conformal waterway comprises a pressing plate, an upper mould, a lower mould and a bottom plate; the pressing plate is connected with the upper die, and the bottom plate is connected with the lower die; the upper die and the lower die are mutually matched and form a die cavity, and the die is characterized in that the upper die is provided with a first circulation system for circulating a heating medium and a cooling medium; the lower die is provided with a second circulation system for circulating a heating medium and a cooling medium;

The first circulating system comprises a first inlet channel, a first return channel and a first outlet channel which are communicated in sequence; the first inflow channel is used for inputting a heating medium and a cooling medium; the first return flow passage is arranged right above the die cavity and is close to the inner side of the formed sole; the first outflow channel is used for outputting heating medium and cooling medium;

the second circulation system comprises a second inlet channel, a second return channel, an outer Zhou Liudao and a second outlet channel which are communicated in sequence; the second inflow channel is used for inputting a heating medium and a cooling medium; the second return flow passage is arranged right below the die cavity and is close to the outer surface of the formed sole; the peripheral runner is arranged around the periphery of the die cavity and is close to the periphery of the formed sole; the second outflow channel is used for outputting heating medium and cooling medium;

the projection area of the first loop-shaped runner on the horizontal section is S1, and the projection area of the formed sole on the horizontal section is S2; wherein S1/S2 is more than or equal to 0.6 and less than or equal to 0.8;

the projection area of the second loop-shaped runner on the horizontal section is S3, and the projection area of the formed sole on the horizontal section is S4; wherein S3/S4 is more than or equal to 0.6 and less than or equal to 0.8.

2. The shoe sole mold with conformal waterway according to claim 1, wherein,

The incision shape of the first return-type runner is a structure with a wide upper part and a narrow lower part, wherein the narrower part is close to the arc-shaped surface inside the formed sole;

And/or the number of the groups of groups,

The shape of the notch of the second return-type runner is a structure with a narrow upper part and a wide lower part, wherein the narrower part is close to the arc-shaped surface of the outer surface of the formed sole.

3. The shoe sole mold with conformal waterway according to claim 1, wherein,

The path track of the first return-type flow channel is in an M shape, and the first inlet flow channel and the first outlet flow channel are respectively connected with the two ends of the first return-type flow channel in the M shape;

And/or the number of the groups of groups,

The path track of the second return flow channel is in an M shape, the second inlet flow channel is connected with one end of the second return flow channel in the M shape, one end of the outer Zhou Liudao is connected with the other end of the second return flow channel in the M shape, and the other end of the outer Zhou Liudao is connected with the second outlet flow channel; the path trajectories of the outer Zhou Liudao are equidistantly arranged along the peripheral contour of the mold cavity.

4. The mold for soles with conformal waterways according to claim 3, wherein the first and second return channels have the same path track.

5. The shoe sole mold with conformal waterway according to claim 1, wherein,

The first loop-shaped runner is arranged in the upper die; the first inlet runner is communicated with one end of the first return runner and extends to the side face of the pressing plate to form a first water inlet, and the first outlet runner is communicated with the other end of the first return runner and extends to the side face of the pressing plate to form a first water outlet;

And/or the number of the groups of groups,

The second return flow passage is arranged in the lower die; the second inlet runner is communicated with one end of the second return runner and extends to the side face of the bottom plate to form a second water inlet, and the second outlet runner is communicated with the other end of the second return runner and extends to the side face of the bottom plate to form a second water outlet.

6. The shoe sole mold with conformal waterway according to claim 1, wherein,

The upper die is also provided with a plurality of first exhaust holes; the first exhaust holes are arranged along the first reverse flow channel;

And/or the number of the groups of groups,

A plurality of second exhaust holes are also formed in the lower die; the plurality of second exhaust holes are arranged along the second return flow passage.

7. A method of making a sole using the sole mould of any one of claims 1 to 6, comprising the steps of, in order:

Step 1, placing raw materials into a die cavity of a lower die, and then clamping an upper die and the lower die;

Step 2, respectively introducing heating media into the first circulation system and the second circulation system, wherein the pressure is P1, the P1 is more than or equal to 0.6Mpa and less than or equal to 1.5Mpa, the temperature of an upper die is increased to T1, the temperature of a lower die is increased to T2, and then the temperature is kept for 15-25 s, wherein the temperature of T1/T2 is more than or equal to 150 ℃ and less than or equal to 240 ℃;

Step 3, respectively introducing cooling media into the first circulation system and the second circulation system, wherein the pressure is P2, P2 is more than or equal to 0.6Mpa and less than or equal to 1.5Mpa, until the temperature of an upper die is reduced to T3, and the temperature of a lower die is reduced to T4, wherein the temperature of T3/T4 is more than or equal to 10 ℃ and less than or equal to 30 ℃;

step 4, opening the mould, separating the upper mould from the lower mould, and taking out the formed sole;

Wherein T1-T2 in the step 2 is less than or equal to +/-3 ℃, and T3-T4 in the step 3 is less than or equal to +/-3 ℃.

8. The method of manufacturing a shoe sole according to claim 7, wherein the heating rate of the upper mold and the heating rate of the lower mold in the step 2 are maintained to be identical, and the cooling rate of the upper mold and the cooling rate of the lower mold in the step 3 are maintained to be identical.

9. The method for manufacturing a shoe sole according to claim 7, wherein,

The temperature of the upper die in the step 2 is increased to T1, the temperature of the lower die is increased to T2, and then the temperature is kept for 10 to 22 seconds, wherein, the temperature of T1/T2 is more than or equal to 180 ℃ and less than or equal to 200 ℃, and P1 is more than or equal to 0.8Mpa and less than or equal to 1.2Mpa;

And 3, the upper die temperature is reduced to T3, and the lower die temperature is reduced to T4, wherein T3/T4 is more than or equal to 15 ℃ and less than or equal to 20 ℃, and P2 is more than or equal to 0.8Mpa and less than or equal to 1.2Mpa.

10. A method for manufacturing the sole mould according to any one of claims 1 to 6, wherein the method adopts a 3D printing technology to integrally form the upper mould or the lower mould; the method sequentially comprises the following steps:

step 1, performing three-dimensional design according to shoe shapes and shoe codes to generate a printing path;

Step 2, selecting a printing substrate with proper size, and sequentially printing layer by using 3D printing equipment to obtain an upper die or a lower die;

step 3, stress removal treatment is carried out on the upper die or the lower die;

and 4, respectively assembling an upper die, a pressing plate, a lower die and a bottom plate.