CN108789993B - Sole mould with heating function - Google Patents

Sole mould with heating function Download PDF

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Publication number
CN108789993B
CN108789993B CN201710305288.7A CN201710305288A CN108789993B CN 108789993 B CN108789993 B CN 108789993B CN 201710305288 A CN201710305288 A CN 201710305288A CN 108789993 B CN108789993 B CN 108789993B
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China
Prior art keywords
mold
die
core
heating
lower die
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CN108789993A (en
Inventor
黄相宇
林士家
谢宏武
陈汝城
郭宗伟
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Pou Chen Corp
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Pou Chen Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3423—Heating or cooling by using a heated or cooled preformed part, e.g. in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/50—Footwear, e.g. shoes or parts thereof
    • B29L2031/504—Soles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A sole mold with a heating function comprises a lower mold unit and a lower heating unit which are arranged on a lower mold base, and an upper mold unit and an upper heating unit which are arranged on an upper mold base. The lower heating unit comprises a lower high-frequency coil which is used for heating a lower die core group or the lower die base in an electromagnetic induction range by generating eddy current. The upper heating unit comprises an upper high-frequency coil which is used for heating an upper die core or the upper die base in an electromagnetic induction range by generating eddy current. Borrow this, utilize the high frequency to reach the heating purpose, not only rate of heating is fast, and heating temperature can be by accurate control, and then promotes off-the-shelf quality.

Description

Sole mould with heating function
Technical Field
The invention relates to a mold, in particular to a sole mold with a heating function.
Background
The EVA foaming material or the TPU foaming material has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance and the like, is non-toxic and non-absorbent, and meets the requirement of environmental protection, so the EVA foaming material or the TPU foaming material is widely applied to the middle sole or the large sole of a shoe product.
Referring to fig. 1, a conventional molding apparatus 1 disclosed in taiwan patent No. 576329 mainly includes a heating mold 11 and a cooling mold 12. The heating mold 11 has a lower mold 111, an upper mold 113 matching with the lower mold 111 and defining a mold cavity 112, and a plurality of electric heating tubes 114 disposed in the lower mold 111 and the upper mold 113. Therefore, when the electric heating tube 114 conducts electricity to generate heat, the heat can be conducted to the lower die 111 and the upper die 113, so as to achieve the purpose of heating the blank.
Generally, the Heating and Heating efficiency of the lower mold 111 and the upper mold 113 will affect the Heating uniformity and the molding cycle, although the Heating speed by the electric Heating tube 114(Heater Heating) is the fastest, which is about 1-3 ℃/sec, the electric Heating tube 114 is not easy to control the generated temperature, the temperature control effect is poor, and due to the heat conduction effect, the heat will be diffused to other components contacting with the lower mold 111 or the upper mold 113, which will affect the service life of other components.
Disclosure of Invention
The invention aims to provide a sole mold with a heating function, which has high heating rate and can accurately control the heating temperature so as to improve the quality of a finished product.
The present invention provides a sole mold with a heating function for heating a blank material, the sole mold comprising: the heating device comprises a lower die base, a lower die unit, an upper die base, an upper die unit, a lower heating unit and an upper heating unit.
The lower die holder includes a lower mounting portion.
The lower die unit is arranged on a lower mounting part of the lower die base and comprises a lower die core group which is provided with a die cavity.
The upper die base includes an upper mounting portion.
The upper die unit is arranged on the upper mounting part of the upper die base and comprises an upper die core which is opposite to the die cavity and is used for matching with the die cavity.
The lower heating unit comprises a lower high-frequency coil which is arranged on a lower mounting part of the lower die holder and is used for heating at least one of the lower die core group and the lower die holder within the electromagnetic induction range by generating eddy current.
The upper heating unit comprises an upper high-frequency coil arranged on an upper mounting part of the upper die holder and is used for heating at least one of the upper die core and the upper die holder within an electromagnetic induction range by generating eddy current.
The lower die base is made of steel, the lower heating unit further comprises at least one shielding layer which is arranged on the lower installation part of the lower die base and located in the electromagnetic induction range, the upper die base is made of steel, and the upper heating unit further comprises at least one shielding layer which is arranged on the upper installation part of the upper die base and located in the electromagnetic induction range.
According to the sole mold with the heating function, the lower mold base and the upper mold base are made of steel respectively, the lower mold core group and the upper mold core are made of copper respectively, when eddy current is generated between the upper mold base and the lower mold base in an electromagnetic induction range to heat, the lower mold core group and the upper mold core are also heated due to the heat conduction effect.
The lower die base also comprises a lower matching surface facing the upper die base and a lower insulating layer formed on the lower matching surface, and the upper die base also comprises an upper matching surface facing the lower die base and an upper insulating layer formed on the upper matching surface.
The lower heating unit also comprises a lower magnetic conduction layer which is contacted with the lower mold core group and is positioned in an electromagnetic induction range, the upper heating unit also comprises an upper magnetic conduction layer which is contacted with the upper mold core and is positioned in the electromagnetic induction range, eddy current is generated between the upper magnetic conduction layer and the lower magnetic conduction layer in the electromagnetic induction range to heat, and the lower mold core group and the upper mold core are also heated due to the heat conduction effect.
The invention relates to a sole mould with a heating function, wherein a lower mould core group and an upper mould core are made of steel respectively, the lower mould core group is provided with a lower insulating layer formed on the outer surface, and the upper mould core is provided with an upper insulating layer formed on the outer surface.
The invention relates to a sole mould with a heating function, wherein the lower mould core group is made of a porous material and is provided with at least one loop, and the loop is used for guiding hot air flow to enter and exit the lower mould core group and enabling the hot air flow in the loop to overflow and disperse from pores of the porous material.
The invention relates to a sole mould with heating function, wherein the lower mould unit also comprises four fixed blocks, each fixed block is provided with a flow channel for hot air to flow in and out, the lower mould core group is provided with a template which is arranged in a lower mounting part of the lower mould base and is provided with fixed blocks at intervals, and four lower mould cores forming the mould cavity, the template is provided with a pore channel for hot air to flow in and out and form a first loop, the lower mould core is arranged on the template in a manner of being capable of moving around a central line, each lower mould core is provided with a flow channel for hot air to flow in and out, and moves between an involution position and a cracking position relative to two adjacent fixed blocks, when in the involution position, the flow channel of each lower mould core is connected with the flow channels of two adjacent fixed blocks to form a second loop and reduce the caliber of the mould cavity, when in the cracking position, the flow passage of each lower die core is separated from the flow passages of the two adjacent fixed blocks, and the aperture of the die cavity is enlarged.
The lower die unit also comprises a plurality of airtight pieces, each airtight piece is arranged between the fixed block and the lower die core at a relative position corresponding to the inlet and the outlet of the corresponding runner, and is provided with a joint hole, and when the lower die core is positioned at the joint position, each joint hole is communicated with two adjacent runners.
The invention relates to a sole mould with a heating function, wherein an upper mould core is made of a porous material and is provided with a flow passage, and the flow passage is used for guiding hot air to flow into and out of the upper mould core and enabling the hot air to overflow and disperse from pores of the porous material.
The invention has the beneficial effects that: the lower module group can expand and contract the aperture of the mold cavity, improve the convenience when the foaming blank is put in or the finished product is taken out, and can stably compress the foaming blank, thereby improving the quality and the yield of the finished product.
Drawings
Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:
fig. 1 is a partial cross-sectional view schematically illustrating a conventional foam pressure-controlling molding apparatus disclosed in taiwan patent No. 576329;
FIG. 2 is a sectional view illustrating a first embodiment of the mold for soles with heating function according to the present invention;
FIG. 3 is a fragmentary top schematic view illustrating a lower core set in an apposition position in the first embodiment;
FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2; (ii) a
FIG. 5 is a cross-sectional view taken along line V-V in FIG. 2;
FIG. 6 is a cross-sectional view illustrating each lower core set in a cracking position in the first embodiment;
FIG. 7 is a fragmentary top schematic view illustrating the first embodiment of the lower die set expanded in the mouth of a cavity for insertion or removal of a foam blank into or from the cavity; and
fig. 8 is a sectional view illustrating a second embodiment of the mold for footwear sole having a heating function according to the present invention.
Detailed Description
Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.
Referring to fig. 2 and 3, an embodiment of the sole mold with heating function of the present invention is used for heating and compressing a foamed material 3 to form a finished product (foamed material). The sole mold comprises a lower mold base 4, a lower mold unit 5, an upper mold base 6, an upper mold unit 7, a lower heating unit 8 and an upper heating unit 9.
The lower die holder 4 is made of steel and includes a lower mating surface 41, a lower insulating layer 42 formed on the lower mating surface 41, and a lower mounting portion 43 recessed from the lower mating surface 41 along a center line L.
The lower mold unit 5 is mounted on the lower mounting portion 43 of the lower mold base 4, and includes a lower mold core set 51, four fixing blocks 52, and a plurality of air-tight members 53 (see fig. 4). The lower mold core set 51 is made of porous copper material, and is manufactured by powder metallurgy or 3D printing, and has a mold plate 511 fixedly disposed in the lower mounting portion 43 of the lower mold base 4, and four lower mold cores 513 disposed around the center line L and displaceably disposed on the mold plate 511 and defining a mold cavity 512 with the mold plate 511. The die plate 511 has a hole 5111 for the hot gas flow to enter and exit and form a first loop. Each lower mold core 513 has a flow passage 5131 for hot gas to flow in and out. The fixing blocks 52 are fixedly provided at the template 511 and spaced apart from each other. Each of the fixed blocks 52 has a flow path 521 (see fig. 4) for the inflow and outflow of the hot gas. In this embodiment, each airtight member 53 is disposed in the corresponding lower mold core 513 at the inlet and outlet of the corresponding flow passage 5131, and has a connection hole 531 between the fixed block 52 and the lower mold core 513.
Referring to fig. 4, it should be noted that each lower mold core 513 is shifted between an involution position (see fig. 3 and 4) and a cracking position (see fig. 6 and 7) relative to the two adjacent fixing blocks 52, in the involution position, the flow passage 5131 of each lower mold core 513 is connected to the flow passage 521 of the two adjacent fixing blocks 52 through the connection hole 531 of the airtight member 53 to form a second loop, so that the hot air flows through the pores of the porous copper material and the aperture of the mold cavity 512 is reduced, and in the cracking position, the flow passage 5131 of each lower mold core 513 is separated from the flow passages 521 of the two adjacent fixing blocks 52 and the aperture of the mold cavity 512 is enlarged.
The upper die base 6 is made of steel and includes an upper mating surface 61, an upper insulating layer 62 formed on the upper mating surface 61, and an upper mounting portion 63 recessed from the upper mating surface 61 along the direction of the center line L.
The upper mold unit 7 is mounted on the upper mounting portion 63 of the upper mold base 6, and includes an upper mold core 71 opposite to the mold cavity 512 and adapted to be aligned with the mold cavity 512.
The upper core 71 is a porous copper material, is manufactured by powder metallurgy or 3D printing, and has a flow channel 711. The runner 711 is used to guide the hot air flow into and out of the upper mold core 71, and to diffuse the hot air flow out of the pores of the porous copper material.
The lower heating unit 8 includes a lower high frequency coil 81 installed on the installation portion 43 of the lower die holder 4, a shielding layer 82 disposed on the lower installation portion 43 of the lower die holder 4 and located within the electromagnetic induction range of the lower high frequency coil 81, and a lower magnetic conductive layer 83 contacting the lower die core set 51 and located within the electromagnetic induction range of the lower high frequency coil 81.
The upper heating unit 9 includes an upper high-frequency coil 91 installed in the upper installation portion 63 of the upper die holder 6, a shielding layer 92 disposed on the upper installation portion 63 of the upper die holder 6 and located in the electromagnetic induction range of the upper high-frequency coil 91, and an upper magnetic conductive layer 93 contacting the upper die core 71 and located in the electromagnetic induction range of the upper high-frequency coil 91.
Referring to fig. 2 and 3, when the upper die base 6 and the upper die unit 7 are aligned with the lower die base 3 and the lower die unit 4, each lower die core 513 is displaced to the aligned position relative to the two adjacent fixing blocks 52, at this time, the flow passage 5131 of each lower die core 513 is connected with the flow passage 521 of the two adjacent fixing blocks 52 through the connecting hole 531 of the airtight member 53, and the aperture of the die cavity 512 is reduced, so as to compress the foamed blank 3 in the die cavity 512.
Referring to fig. 2, 4 and 5, when the lower high-frequency coil 81 and the upper high-frequency coil 91 conduct current, eddy current is generated in the lower magnetic-conductive layer 83 and the upper magnetic-conductive layer 93 within the electromagnetic induction range to rapidly heat, and the lower mold core set 51 and the upper mold core 71 are also heated by heat conduction. Meanwhile, the hot air flow enters and exits the upper mold core 71 through the flow passage 711 of the upper mold core 71, enters and exits the mold plate 511 through the pore 5111 of the mold plate 511, enters and exits the lower mold core 513 and the fixed block 52 through the flow passage 5131 of the lower mold core 513 and the flow passage 521 of the fixed block 52, and the porous material has multiple pores, so that the hot air flow is further dispersed through the pores of the upper mold core 71, the mold plate 511 and the lower mold core 513, so that the upper mold core 71, the mold plate 511 and the lower mold core 513 contacting the foamed blank 3 are rapidly and uniformly heated, and the heating purpose is achieved.
It should be noted that the outlets of the flow passages 5131, 5111, 711 are provided with valves (not shown) capable of controlling the size of the outlets, so that the flow rate of the hot air flowing through the lower mold core 513, the mold plate 511 and the upper mold core 71 can be controlled by controlling the size of the outlets of the valves, thereby controlling the temperature rising speed.
Although the lower die base 4 and the upper die base 6 are made of a magnetic conductive steel material, the shielding effect of the shielding layer 82 and the shielding layer 92 prevents eddy current from being generated in the lower die base 4 and the upper die base 6, and reduces and controls the area in which eddy current is generated.
And the lower insulating layer 42 of the lower mating surface 41 of the lower die holder 4 and the upper insulating layer 62 of the upper mating surface 61 of the upper die holder 6 can not generate an arc effect due to incomplete contact when the lower mating surface 41 is mated with the upper mating surface 61, thereby avoiding damage to the lower die holder 4 and the upper die holder 6.
Referring to fig. 6 and 7, when the upper die base 6 and the upper die unit 7 are far away from the lower die base 4 and the lower die unit 5, each lower die core 513 is displaced to the splitting position relative to the two adjacent fixing blocks 52, at this time, the flow passage 5131 of each lower die core 513 is separated from the flow passages 521 of the two adjacent fixing blocks 52, and the aperture of the die cavity 512 is enlarged, so that the foamed blank 3 can be easily taken out of the die cavity 512 or placed into the die cavity 512 by an automated device (not shown).
Referring to fig. 8, a second embodiment of the present invention is substantially the same as the first embodiment, except that:
the lower magnetic conductive layer 83 and the upper magnetic conductive layer 93 as shown in fig. 2 are omitted.
The lower mold core 51 is a porous steel material, also made by powder metallurgy or 3D printing. And each lower mold core 513 further has a lower insulating layer 5132 formed on the top surface.
The upper core 71 is a porous steel material, also made by powder metallurgy or 3D printing, and has an upper insulating layer 712 formed on the top surface.
Therefore, since the steel material is also permeable to magnetic flux, when the lower high-frequency coil 81 and the upper high-frequency coil 91 conduct current, eddy current is generated in the lower mold core set 51 and the upper mold core 71 within the electromagnetic induction range, respectively, to rapidly heat the lower mold core set and the upper mold core 71, thereby achieving the heating purpose.
Similarly, the lower insulating layer 5132 of the lower mold core 513 and the upper insulating layer 712 of the upper mold core 71 can be matched without generating an arc effect due to incomplete contact, thereby preventing the lower mold base 4 and the upper mold base 6 from being damaged.
From the above description, the advantages of the foregoing embodiments can be summarized as follows:
1. the invention achieves the heating purpose by utilizing high frequency, not only has high heating rate, but also can accurately control the heating temperature or the heating area, thereby improving the quality of finished products.
2. Furthermore, the present invention utilizes the porous property of the porous material, which can make the hot air flow overflow and disperse between the pores of the lower mold core set 51 and the upper mold core 71, further accelerate the temperature rise rate and the uniformity during temperature rise, not only can greatly shorten the process time, promote the economic benefit, but also can further promote the quality of the finished product, and has practicability.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims (9)

1. A mold for shoe soles having a heating function for heating a raw material, the mold for shoe soles comprising:
a lower die holder including a lower mounting portion;
the lower die unit is arranged at the lower mounting part of the lower die base and comprises a lower die core group with a die cavity;
an upper die holder including an upper mounting portion;
the upper die unit is arranged on the upper mounting part of the upper die base and comprises an upper die core which is opposite to the die cavity and is used for being matched with the die cavity;
the method is characterized in that:
the lower die unit also comprises four fixed blocks, each fixed block is provided with a runner for hot gas to flow in and out, the lower die core group is provided with a template which is arranged in the lower mounting part of the lower die base and is provided with the fixed blocks at intervals, and four lower die cores forming the die cavity, the template is provided with a pore passage for hot gas to flow in and out and forming a first loop, the lower die cores are arranged on the template in a manner of being capable of moving around a central line, each lower die core is provided with a runner for hot gas to flow in and out, and is displaced between an involution position and a cracking position relative to two adjacent fixed blocks, when in the involution position, the runner of each lower die core is connected with the runners of two adjacent fixed blocks to form a second loop and reduce the caliber of the die cavity, when in the cracking position, the runner of each lower die core is separated from the runners of two adjacent fixed blocks, and enlarging the aperture of the mold cavity;
and the sole mold further comprises:
the lower heating unit comprises a lower high-frequency coil arranged on a lower mounting part of the lower die holder and is used for heating at least one of the lower die core group and the lower die holder in an electromagnetic induction range by generating eddy current; and
and the upper heating unit comprises an upper high-frequency coil arranged on the upper mounting part of the upper die holder and is used for heating at least one of the upper die core and the upper die holder in an electromagnetic induction range by generating eddy current.
2. The mold for shoe soles with heating function according to claim 1, characterized in that: this die holder is steel, and this lower heating unit still includes the lower installation department that sets up at this die holder and is located at least one shielding layer of electromagnetic induction scope, and this upper die base is steel, and this upper heating unit still including setting up the last installation department at this upper die base and be located at least one shielding layer of electromagnetic induction scope.
3. The mold for shoe soles with heating function according to claim 1, characterized in that: the lower die base and the upper die base are made of steel respectively, the lower die core group and the upper die core are made of copper respectively, when the upper die base and the lower die base in an electromagnetic induction range generate eddy current to heat, the lower die core group and the upper die core are also heated due to the heat conduction effect.
4. The mold for shoe soles with heating function according to claim 2 or 3, characterized in that: the lower die holder also comprises a lower matching surface facing the upper die holder and a lower insulating layer formed on the lower matching surface, and the upper die holder also comprises an upper matching surface facing the lower die holder and an upper insulating layer formed on the upper matching surface.
5. The mold for shoe soles with heating function according to claim 3, characterized in that: the lower heating unit further comprises a lower magnetic conduction layer which is in contact with the lower mold core group and is located within the electromagnetic induction range, the upper heating unit further comprises an upper magnetic conduction layer which is in contact with the upper mold core and is located within the electromagnetic induction range, eddy current is generated between the upper magnetic conduction layer and the lower magnetic conduction layer within the electromagnetic induction range to heat the upper magnetic conduction layer and the lower mold core group, and the lower mold core group and the upper mold core are also heated due to the heat conduction effect.
6. The mold for shoe soles with heating function according to claim 1, characterized in that: the lower mold core set and the upper mold core are made of steel respectively, the lower mold core set is provided with a lower insulating layer formed on the outer surface, and the upper mold core is provided with an upper insulating layer formed on the outer surface.
7. The mold for shoe soles with heating function according to claim 1, characterized in that: the lower mold core set is a porous material, and is used for enabling hot air flow in the first loop and the second loop to overflow from pores of the porous material.
8. The mold for shoe soles with heating function according to claim 1, characterized in that: the lower die unit also comprises a plurality of airtight pieces, the inlet and the outlet of each airtight piece, which correspond to the runner of the lower die core, are arranged between the fixed block and the lower die core at opposite positions, and each airtight piece is provided with a joint hole, and when the lower die core is positioned at the opposite position, each joint hole is communicated with the runner of the adjacent lower die core and the runner of the fixed block.
9. The mold for shoe soles with heating function according to claim 1, characterized in that: the upper mold core is made of porous material and has one runner for leading hot air to flow into and out of the upper mold core and to diffuse through the pores of the porous material.
CN201710305288.7A 2017-05-03 2017-05-03 Sole mould with heating function Active CN108789993B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710305288.7A CN108789993B (en) 2017-05-03 2017-05-03 Sole mould with heating function

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Application Number Priority Date Filing Date Title
CN201710305288.7A CN108789993B (en) 2017-05-03 2017-05-03 Sole mould with heating function

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CN108789993A CN108789993A (en) 2018-11-13
CN108789993B true CN108789993B (en) 2020-08-25

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Publication number Priority date Publication date Assignee Title
TWI721733B (en) * 2019-12-26 2021-03-11 復盛應用科技股份有限公司 Formation method of a thermoplastic material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019632C2 (en) * 1990-06-20 1996-12-19 Tetra Pak Gmbh Device for heating plate-shaped parts made of thermoformed plastic
CN205835798U (en) * 2016-06-29 2016-12-28 常州松林橡塑有限公司 A kind of sponge secondary high density foaming and forming apparatus
CN106393549A (en) * 2016-09-20 2017-02-15 东莞市乔迪麦机械科技有限公司 Small-foam insole molding combination type die and insole molding machine applying the same
CN206106200U (en) * 2016-10-08 2017-04-19 黄遵建 Compression molding mould based on electromagnetic induction heating

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