CN114347374A - Electromagnetic heating filter plate casting and injection molding packaging process - Google Patents
Electromagnetic heating filter plate casting and injection molding packaging process Download PDFInfo
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- CN114347374A CN114347374A CN202210090649.1A CN202210090649A CN114347374A CN 114347374 A CN114347374 A CN 114347374A CN 202210090649 A CN202210090649 A CN 202210090649A CN 114347374 A CN114347374 A CN 114347374A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 58
- 238000005266 casting Methods 0.000 title claims abstract description 23
- 238000001746 injection moulding Methods 0.000 title claims abstract description 22
- 238000012858 packaging process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007493 shaping process Methods 0.000 claims description 62
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 238000005538 encapsulation Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
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- 238000005498 polishing Methods 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 101100493710 Caenorhabditis elegans bath-40 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Abstract
The invention relates to the field of production of filter pressing equipment, in particular to a casting and injection molding packaging process for an electromagnetic heating filter plate. The electromagnetic heating filter plate produced by the process has isotropy, the retractility of the material is consistent in all directions under the condition of large temperature change, the material is prevented from cracking due to inconsistent internal stress, a ferrous metal plate such as a stainless steel plate is fixed on one side or two sides of the electromagnetic heating filter plate, and the cable coil is formed into the electromagnetic heating plate after being electrified. The electromagnetic heating filter plate produced in this way has good anti-cracking, anti-seepage and anti-extrusion effects, simple structure, electric energy saving and long service life.
Description
Technical Field
The invention relates to the field of production of filter pressing equipment, in particular to a casting and injection molding packaging process for an electromagnetic heating filter plate.
Background
The heating plate in the filter pressing equipment is used as the heating plate for heating and drying the filter cake formed in the production of the filter press, and the effect of the filter press is directly influenced. The heating core plate of the core of the existing heating plate is formed by fastening a plurality of components, and the structure has the defects of poor compression resistance effect, complex structure, more production processes, increased energy consumption, short service life and the like. In addition, although the existing electromagnetic heating plate produced by secondary fusion can improve the defects, the finished plate has the defects of easy cracking and leakage. The application numbers of the applicant are as follows: 2021100016531, the heating core plate produced by the method for manufacturing heat-resistant electromagnetic coil core plate is easy to generate some local cracking phenomena.
Disclosure of Invention
In view of the above, there is a need for an electromagnetic heating filter plate casting and injection molding encapsulation process for producing an electromagnetic heating filter plate. The electromagnetic heating filter plate is molded into an integral plate-shaped structure by a mold, the shaping coil is arranged in the middle of the plate body, and the shaping coil is wrapped in the integral plate structure, so that the produced electromagnetic heating filter plate has good anti-cracking, anti-seepage and anti-extrusion effects, simple structure, electric energy saving and long service life.
The electromagnetic heating filter plate casting and injection molding packaging process comprises the following steps:
firstly, manufacturing a shaping mold; secondly, manufacturing a shaping coil; thirdly, fixing the shaping coil in a shaping mould; fourthly, placing the shaping mould in the previous step into a constant temperature device; fifthly, injecting high-temperature liquefied resin into the shaping mold in the previous step; sixthly, after the liquefied resin is injected in the last step until the shaping mold finishes the curing reaction, taking out the shaping mold from the constant temperature device, reducing the temperature to the room temperature, and disassembling the shaping mold to obtain a formed body; seventh step of boiling the formed body obtained in the previous step in hot water; and step eight, finishing the surface of the formed body to obtain a finished product of the electromagnetic heating filter plate.
Furthermore, the shaping mold in the first step is divided into a casting mold and an injection mold, wherein the casting mold is a closed cavity body with a detachable peripheral wall and an injection opening at the top end; the injection mold is a closed cavity body with detachable peripheral walls and injection ports on two sides; the shape of the cavity in the two is consistent with the shape of the finished product electromagnetic heating filter plate. The walls around the mould can be bolted to facilitate disassembly.
Furthermore, the second step of manufacturing the shaped coil is that the first method is that the coil is fixed on a hollow plate with a preset coil shape, a hollow groove can be arranged in the hollow plate, the shape of the hollow groove is consistent with the shape of a preset cable coil, and the cable coil can be fixedly arranged in the hollow groove by a clamping method; fixing the cable coil on a grid made of a high-temperature-resistant insulating material according to a required shape, wherein the cable coil can be fixed by adopting a binding tape which can resist the temperature of more than 200 ℃, the grid can be made by weaving or pressing, and the grid can be square, diamond, circular and the like; and the third method is to fix the cable coil on a spider-web-shaped fixing frame, and the cable coil can be fixed by adopting a binding belt resistant to more than 200 ℃. The shape of the cable coil is a spiral involute shape formed by laying cables in the same plane, two ends of each cable line extend outwards in parallel to the edge of the shaping mold to form a wiring terminal, and the shape of the spiral involute can allow a plurality of deformation structures according to actual needs.
Further, the third step fixes the shaped coil in a central layer of a shaping mold, wherein terminals of the shaped coil are exposed out of a frame of the shaping mold.
Further, in the fourth step, the shaping mold in the third step is vertically placed into a constant temperature device, and the temperature is kept at 155-160 ℃; the thermostatic device is divided into two types: one is a box body, two sides of the box body are composed of electromagnetic heating plates (the electromagnetic heating plates are not electromagnetic heating filter plates and are additionally provided with heating devices), an involute spiral coil is arranged in each electromagnetic heating plate, the inner side of each electromagnetic heating plate is composed of a ferrous metal plate, after the coil is electrified, the ferrous metal plates generate eddy current to generate heat, and the temperature of each electromagnetic heating plate is controlled to be 155-160 ℃ through a peripheral circuit; and the other is a liquid constant temperature pool, enough heat conduction oil or paraffin is put into the pool, and the liquid temperature is maintained at 155-160 ℃ as well. In addition, the electromagnetic heating plate can also be directly fixed on the periphery or two sides of the shaping mold to directly heat and maintain the temperature of the mold.
Further, injecting high-temperature liquefied resin in the fifth step, wherein the injection is divided into two modes, namely a pouring mode and an injection molding mode, each mode is divided into two steps, raw material treatment and injection treatment, firstly, the raw material is treated, firstly, the monomer raw material is poured into a melting furnace, the melting furnace is kept for more than 30 minutes at the temperature of 150-160 ℃ in a common environment, secondly, the monomer raw material is poured into a drying reaction kettle, alkali is added for dehydration in a vacuum environment, the ratio of the added alkali to the raw material is 0.004, the temperature is kept for more than 45 minutes at 140-145 ℃, thirdly, polymerization preparation is carried out, the temperature is adjusted to 150-160 ℃, a curing agent is added, the ratio of the added curing agent to the raw material is 0.003, and the polymerization preparation is completed within 10 seconds; and secondly, pouring the liquefied resin material added with the curing agent at 155-160 ℃ into the pouring mold through an injection port at the top end within 20 seconds, or injecting the material into the injection mold through injection ports at two sides in the same time in an injection molding mode, and keeping the materials in the constant temperature device for 3-5 minutes.
And further, in the sixth step, after the liquefied resin is injected in the last step until the solidification reaction of the shaping mold is completed, the shaping mold is taken out and naturally cooled to the room temperature, and the peripheral walls of the shaping mold are removed to obtain a formed body containing the cable coil.
And a seventh step of boiling the molded body obtained in the sixth step in hot water at 85 to 90 ℃ for 24 hours or more.
Further, in the eighth step, the surface, edges and corners of the forming body in the seventh step are cut or polished to remove redundant parts, so that a finished product of the electromagnetic heating plate is formed.
The invention has the beneficial effects that:
the electromagnetic heating filter plate casting and injection molding packaging process is provided, so that the cable coil is positioned in the middle of the produced electromagnetic heating filter plate and is in an integrally wrapped state, the electromagnetic heating filter plate produced by the process is isotropic, the flexibility of the material is consistent in all directions under the condition of great temperature change, the cracking of the material caused by inconsistent internal stress is avoided, and the service life of the material is prolonged. A ferrous metal plate, such as a stainless steel plate, is fixed on one side or two sides of the electromagnetic heating filter plate, and the electromagnetic heating plate is formed after the cable coil is electrified.
Drawings
Fig. 1 is a schematic view of the process flow of casting and injection molding packaging of the electromagnetic heating filter plate of the present invention.
Fig. 2 is an exploded view of the shaping mold.
Fig. 3 is a schematic view of a coil fixing plate.
Fig. 4 is a schematic view of a cable coil.
Fig. 5 is a schematic view of the shaped coil formed after the cable coil is fixed to the coil fixing plate.
FIG. 6 is a schematic front view of a moldboard.
FIG. 7 is a schematic view of the back of the moldboard.
FIG. 8 is a schematic view of the mold plate, the setting coil, and the mold plate being sequentially assembled and placed in the setting mold.
FIG. 9 is a schematic view of the mold plate, the setting coil, and the mold plate being sequentially assembled and then placed in the setting mold.
FIG. 10 is a schematic view showing a mold plate, a setting coil, and a mold plate being sequentially combined, placed in a setting mold, and placed in a constant temperature bath as a whole.
Fig. 11 is a schematic view of a finished electromagnetic heating filter plate produced by the casting and injection molding packaging process of the electromagnetic heating filter plate of the present invention.
The parts in the figure are marked as follows: the shaping mould 10, the support bracket 11, the shaping plate 12, the shaping coil 20, the coil fixing plate 21, the cable coil 22, the coil terminal 23, the moulding plate 30, the suspension hook 31, the liquid thermostatic bath 40 and the electromagnetic heating filter plate 50.
Detailed Description
As shown in fig. 1, a schematic flow chart of the electromagnetic heating filter plate casting and injection molding encapsulation process is shown. Firstly, manufacturing a shaping mold 10; second, the forming coil 20 is manufactured; the third step is to fix the shaping coil 20 in the shaping mould 10; fourthly, placing the shaping mould 10 in the previous step into a constant temperature device; fifthly, injecting high-temperature liquefied resin into the shaping mold 10 in the previous step; sixthly, injecting liquefied resin into the shaping mold 10 in the previous step, taking the shaping mold 10 out of the constant temperature device after the curing reaction is finished, reducing the temperature to the room temperature, and disassembling the shaping mold 10 to obtain a formed body; seventh step of boiling the formed body obtained in the previous step in hot water; and step eight, finishing the surface of the formed body to obtain a finished product of the electromagnetic heating filter plate 50.
In the example, as shown in fig. 2, the shaping mold 10 in the first step is formed by two shaping plates 12 with the same size, and a U-shaped support frame 11 is clamped between the two shaping plates, and the three are identical in outer contour, flush in edge and fixed through bolts.
In one example, as shown in fig. 6 to 7, a molding plate 30 is added as a metal plate having a smaller area than the shape of the shape plate 12, and has a smooth front surface and a desired shape on a rear surface.
In the example, the shaping coil 20 (see fig. 5) of the second step is consistent with the length and width dimensions of the molding plate 30 (see fig. 6 and 7), and is fabricated by prefabricating a hollowed-out coil fixing plate 21 (see fig. 3) by processing a wire groove, wherein the wire groove is adapted to the shape of the cable coil 22 (see fig. 4), and the cable coil 22 is enclosed into a spiral shape and fixed in the wire groove of the coil fixing plate 21.
In the third step, as shown in fig. 8, two of the modeling plates 30 are placed with their back surfaces facing each other and the shaped coil 20 sandwiched therebetween, and the three plates are aligned with their edges aligned, separated by a support at equal distances and stabilized, and then fixed in a combined body, wherein two or more hanging hooks 31 are fixed to the upper ends of the front surfaces of the two modeling back plates in corresponding positions, and the combined body is hung in the shaping mold 10 with its opening facing upward by the hanging hooks 31 (see fig. 9), wherein the coil terminals 23 are exposed from the top edge of the shaping mold 10.
In the example, in the fourth step, as shown in fig. 10, the shaping mold 10 in the third step is vertically placed into a liquid constant temperature tank 40 with the opening facing upward, and the temperature of the liquid is maintained at 155 to 160 ℃.
In the example, the fifth step is divided into two steps, raw material treatment and casting treatment, firstly, the raw material is treated, firstly, monomer raw material is poured into a melting furnace (not shown in the figure), the melting furnace is at the normal environment, the temperature is 150-160 ℃, the holding time is more than 30 minutes, secondly, the monomer raw material is poured into a drying reaction kettle (not shown in the figure), alkali is added for dehydration under the vacuum environment, the ratio of the added alkali to the raw material is about 0.004, the temperature is 140-145 ℃, the holding time is more than 45 minutes, thirdly, polymerization preparation is carried out, the temperature is adjusted to 150-160 ℃, curing agent is added, the ratio of the added curing agent to the raw material is 0.003, and the process is completed within 10 seconds; and secondly, injecting the liquefied resin material added with the curing agent at the temperature of 155-160 ℃ into the shaping mold 10 in the fifth step within 20 seconds, and keeping the liquefied resin material in the constant temperature pool for 3-5 minutes.
In the example, in the sixth step, as shown in fig. 10 to 11, the shaping mold 10 in the sixth step is taken out from the thermostatic bath, and the shaping plate 12 and the supporting frame 11 of the shaping mold 10, and the shaping plate 30 and the hanging hook 31 are removed to obtain a molded body including the cable coil 22.
And seventhly, putting the formed body in the seventh step into hot water for boiling, wherein the temperature is between 85 and 90 ℃, and the formed body is maintained for more than 24 hours.
And eighthly, cutting or grinding the surface, edges and corners of the formed body obtained in the eighth step to remove redundant parts (such as burrs) to form a finished product of the electromagnetic heating filter plate 50 (see fig. 11).
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, many alternatives and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A kind of electromagnetic heating filter plate casts and moulds plastics the packaging process, the first step makes the shaping mould; secondly, manufacturing a shaping coil; thirdly, fixing the shaping coil in a shaping mould; fourthly, placing the shaping mould in the previous step into a constant temperature device; fifthly, injecting high-temperature liquefied resin into the shaping mold in the previous step; sixthly, injecting liquefied resin into the shaping mold in the previous step, taking out the shaping mold from the constant temperature device after the solidification reaction is finished, reducing the temperature to room temperature, and disassembling the shaping mold to obtain a formed body; seventh step of boiling the formed body obtained in the previous step in hot water; and step eight, finishing the surface of the formed body to obtain a finished product of the electromagnetic heating filter plate.
2. The electromagnetic heating filter plate casting and injection molding encapsulation process according to claim 1, characterized in that: the shaping mold in the first step is divided into a casting mold and an injection mold, and the casting mold is a closed cavity body with a detachable peripheral wall and an injection opening at the top end; the injection mold is a closed cavity body with detachable peripheral walls and injection ports on two sides; the shape of the cavity in the two is consistent with the shape of the finished product electromagnetic heating filter plate.
3. The electromagnetic heating filter plate casting and injection molding encapsulation process according to claim 2, characterized in that: the second step of manufacturing the shaped coil, namely fixing the coil on a hollow plate with a preset coil shape; fixing the cable coil on a grid made of high-temperature-resistant insulating material according to a required shape; and the third method is to fix the cable coil on a spider-web-shaped fixing frame.
4. The electromagnetic heating filter plate casting and injection molding encapsulation process according to claim 3, wherein: and the third step, fixing the shaping coil in a central layer of a shaping mould, wherein the terminal of the shaping coil is exposed out of the frame of the shaping mould.
5. The electromagnetic heating filter plate casting and injection molding encapsulation process according to claim 4, wherein: the fourth step, vertically placing the shaping mold in the third step into a constant temperature device, and keeping the temperature at 155-160 ℃; the thermostatic device is divided into two types: one is a box body, two sides of the box body are composed of electromagnetic heating plates, an involute spiral coil is arranged in each electromagnetic heating plate, the inner side of each electromagnetic heating plate is composed of a ferrous metal plate, after the coils are electrified, the ferrous metal plates generate eddy current to generate heat, and the temperature of the ferrous metal plates is controlled to be 155-160 ℃ through a peripheral circuit; and the other is a liquid constant temperature pool, enough heat conduction oil or paraffin is put into the pool, and the liquid temperature is maintained at 155-160 ℃ as well.
6. The casting and injection molding encapsulation process of the electromagnetic heating filter plate according to claim 5, wherein: injecting high-temperature liquefied resin in the fifth step, wherein the injection is divided into two modes, namely a pouring mode and an injection molding mode, each mode is divided into two steps, raw material treatment and injection treatment are carried out, firstly, the raw material is treated, the monomer raw material is poured into a melting furnace, the melting furnace is kept at the temperature of 150-160 ℃ for more than 30 minutes in a common environment, secondly, the monomer raw material is poured into a drying reaction kettle, alkali is added for dehydration in a vacuum environment, the ratio of the added alkali to the raw material is 0.004, the temperature is kept at 140-145 ℃ for more than 45 minutes, thirdly, polymerization preparation is carried out, the temperature is adjusted to 150-160 ℃, the curing agent is added, the ratio of the added curing agent to the raw material is 0.003, and the polymerization preparation is completed within 10 seconds; and secondly, pouring the liquefied resin material added with the curing agent at 155-160 ℃ into the pouring mold through an injection port at the top end within 20 seconds, or injecting the material into the injection mold through injection ports at two sides in the same time in an injection molding mode, and keeping the materials in the constant temperature device for 3-5 minutes.
7. The casting and injection molding encapsulation process of the electromagnetic heating filter plate according to claim 7, wherein: and in the sixth step, after the liquefied resin is injected to the shaping mold in the previous step to finish the curing reaction, taking out the shaping mold, naturally cooling to room temperature, and removing the peripheral walls of the shaping mold to obtain a formed body containing the cable coil.
8. The casting and injection molding encapsulation process of the electromagnetic heating filter plate according to claim 7, wherein: and step seven, putting the formed body obtained in the step six into hot water for boiling, wherein the temperature is between 85 and 90 ℃, and the formed body is maintained for more than 24 hours.
9. The electromagnetic heating filter plate casting and injection molding encapsulation process according to claim 8, wherein: and step eight, cutting or polishing the surface, edges and corners of the forming body obtained in the step seven to remove redundant parts to form a finished product of the electromagnetic heating plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210090649.1A CN114347374A (en) | 2022-01-26 | 2022-01-26 | Electromagnetic heating filter plate casting and injection molding packaging process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210090649.1A CN114347374A (en) | 2022-01-26 | 2022-01-26 | Electromagnetic heating filter plate casting and injection molding packaging process |
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| CN114347374A true CN114347374A (en) | 2022-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090012A (en) * | 2022-07-18 | 2022-09-23 | 海得诺环保科技(厦门)有限公司 | Heating filter plate made of sludge dewatering metal material and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606453A (en) * | 2013-12-06 | 2014-02-26 | 浙江江山源光电气有限公司 | Dry-type transformer coil pouring die and method |
| CN110480928A (en) * | 2019-08-06 | 2019-11-22 | 金华职业技术学院 | A kind of aluminium alloy-PP injection molding adhering device and technique |
| CN111957083A (en) * | 2020-09-17 | 2020-11-20 | 第一环保（深圳）股份有限公司 | Omnibearing high-frequency eddy heating drying filter plate |
| CN213357297U (en) * | 2020-09-18 | 2021-06-04 | 第一环保（深圳）股份有限公司 | Heating plate structure of sludge filter pressing equipment |
-
2022
- 2022-01-26 CN CN202210090649.1A patent/CN114347374A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606453A (en) * | 2013-12-06 | 2014-02-26 | 浙江江山源光电气有限公司 | Dry-type transformer coil pouring die and method |
| CN110480928A (en) * | 2019-08-06 | 2019-11-22 | 金华职业技术学院 | A kind of aluminium alloy-PP injection molding adhering device and technique |
| CN111957083A (en) * | 2020-09-17 | 2020-11-20 | 第一环保（深圳）股份有限公司 | Omnibearing high-frequency eddy heating drying filter plate |
| CN213357297U (en) * | 2020-09-18 | 2021-06-04 | 第一环保（深圳）股份有限公司 | Heating plate structure of sludge filter pressing equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115090012A (en) * | 2022-07-18 | 2022-09-23 | 海得诺环保科技(厦门)有限公司 | Heating filter plate made of sludge dewatering metal material and preparation process thereof |
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