CN114525704A - Independent flat electromagnetic heating paper pulp molding forming equipment - Google Patents
Independent flat electromagnetic heating paper pulp molding forming equipment Download PDFInfo
- Publication number
- CN114525704A CN114525704A CN202210258717.0A CN202210258717A CN114525704A CN 114525704 A CN114525704 A CN 114525704A CN 202210258717 A CN202210258717 A CN 202210258717A CN 114525704 A CN114525704 A CN 114525704A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- 238000000465 moulding Methods 0.000 title claims abstract description 15
- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 230000006378 damage Effects 0.000 abstract description 7
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
Abstract
The invention relates to independent flat electromagnetic heating paper pulp molding equipment, which comprises a rack and a mold, wherein the mold is connected to the rack in a sliding manner along the length direction of the rack, a support frame is fixed on the rack, a pulp supply tank is fixed on the support frame, the pulp supply tank is communicated with a discharging pipe, a mounting frame is fixed on the rack, a power cylinder is arranged on the mounting frame, an upper fixing plate is fixed on the power cylinder, a lower fixing plate corresponding to the upper fixing plate is fixed on the rack, the upper fixing plate and the lower fixing plate are both connected with a heating plate, a wire inlet groove and a wire outlet groove are formed in the heating plate, the wire inlet groove is communicated with the side wall of the heating plate, a plurality of first U-shaped grooves are formed in the heating plate, the two ends of the wire placing groove are respectively communicated with the first U-shaped groove and the second U-shaped groove, the wire inlet groove is communicated with the first U-shaped groove, one end of the wire outlet groove is communicated with the second U-shaped groove, and the other end of the wire outlet groove is communicated with the wire inlet groove. The invention has the following advantages: this scheme utilization new construction reaches the purpose that is difficult for causing the injury to the workman.
Description
Technical Field
The invention relates to lunch box production equipment, in particular to independent flat electromagnetic heating pulp molding equipment.
Background
Because the environment plasticization is increasingly serious, paper is used for replacing plasticization, but the heating mode of the paper pulp model forming machine in the market at present generally adopts electric heating tubes for heating and heat conducting oil for heating.
The electric heating tube has huge heating energy consumption, is easy to damage and inconvenient to maintain when heated for a long time. Although the energy consumption of the heat conducting pipe for heating is lower than that of the electric heating pipe, the defect that workers are scalded due to oil leakage easily exists.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the independent flat electromagnetic heating paper pulp molding forming equipment, which achieves the purposes of low failure rate and difficult damage to workers.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a dull and stereotyped electromagnetic heating paper pulp molding equipment of stand alone type, includes frame and mould, the mould is along the length direction sliding connection of frame in the frame, the frame on be fixed with the support frame, the support frame on be fixed with and supply the thick liquid case, supply thick liquid case intercommunication have the unloading pipe, the frame on be fixed with the mounting bracket, the mounting bracket on be provided with the power cylinder, the power cylinder is fixed with the upper fixed plate, the frame on be fixed with the bottom plate that corresponds with the upper fixed plate, upper fixed plate and bottom plate all be connected with the hot plate, the upper fixed plate be connected with mould complex cope match-plate pattern, the hot plate be located the cope match-plate pattern, the hot plate on seted up inlet wire groove, outlet wire groove, inlet wire groove and the lateral wall intercommunication of hot plate, the hot plate on seted up a plurality of first U-shaped grooves, second U-shaped groove and put the wire casing, the two ends of the wire placing groove are respectively communicated with the first U-shaped groove and the second U-shaped groove, the wire inlet groove is communicated with the first U-shaped groove, one end of the wire outlet groove is communicated with the second U-shaped groove, and the other end of the wire outlet groove is communicated with the wire inlet groove.
By adopting the technical scheme, the mould is arranged below the blanking pipe, the slurry in the slurry box is injected into the mould along the blanking pipe, the mould moves to a position between the upper fixing plate and the lower fixing plate, the power cylinder is started to enable the upper fixing plate to be matched with the lower fixing plate, and the upper template is matched with the mould; the electric wire enters into the hot plate from the inlet wire groove, again along putting the wire casing, first U-shaped groove, the second U-shaped groove passes, wear out from the wire outlet groove at last, the electric wire is putting the wire casing, form the S-shaped on first U-shaped groove and the second U-shaped groove jointly and walk the line, form a plurality of electromagnetic heating district on the hot plate, because electric wire self does not generate heat, place the mould between two hot plates, the electric wire circular telegram back, can make the mould generate heat, thick liquids shaping in the mould, this kind of heating methods is not fragile and be convenient for maintenance, can not cause the injury to the workman for the heat pipe heating, and because heat direct action is in mould and cope match-plate, heat loss has been reduced, greatly reduce power consumption.
The invention is further configured to: the side wall of the wire outlet groove is provided with a multiple wire groove which is communicated with the wire inlet groove.
Through adopting above-mentioned technical scheme, the electric wire enters into the hot plate from the inlet wire groove, again along putting the wire casing, first U-shaped groove, the compound wire casing is passed to the second U-shaped groove, again along the compound wire casing reeve the inlet wire groove, again along putting wire casing, first U-shaped groove, the second U-shaped groove passes the outlet wire groove, make the electric wire wear out the hot plate from the outlet wire groove at last, make the electric wire form twice S-shaped on putting wire casing, first U-shaped groove and second U-shaped groove jointly and walk the line to further promote heating efficiency.
The invention is further configured to: the heating plate is provided with a plurality of exhaust holes, and the frame is provided with a steam removal mechanism.
Through adopting above-mentioned technical scheme, have more water in the paper pulp, when heating the mould, produce more steam, steam passes through the exhaust hole, and steam is detached through removing vapour mechanism at last, makes the workshop keep dry and comfortable, is difficult for making steam scald the workman simultaneously.
The invention is further configured to: the exhaust hole is positioned between the wire inlet grooves and the wire placing grooves and/or between the wire placing grooves and the wire outlet grooves.
Through adopting above-mentioned technical scheme, make the exhaust hole be located the region that electromagnetic heating formed, greatly promote the efficiency of getting rid of steam.
The invention is further configured to: the steam removal mechanism include separator box, lower separator box and air exhauster, last separator box sliding connection on the mounting bracket, an upper fixed plate is located the separator box, lower separator box be fixed in the frame, the bottom plate be located lower separator box, last separator box and lower separator box cooperation, the lateral wall intercommunication of first exhaust column and lower separator box of air exhauster.
Through adopting above-mentioned technical scheme, at the in-process that the hot plate heated mould and cope match-plate pattern, steam was full of in the space that isolation box and lower isolation box formed, starts the air exhauster, takes steam out from this space through first exhaust column.
The invention is further configured to: the frame on be fixed with the guide board that is located the bottom plate below, it is a plurality of enclose between the guide board and become to hold the chamber, the bottom plate be located and hold the chamber, the guide board on be fixed with and hold the second exhaust column of chamber intercommunication, second exhaust column and first exhaust column intercommunication.
Through adopting above-mentioned technical scheme, because the density of steam is greater than the air, therefore, most steam enters into and holds the chamber, can take out steam from holding the intracavity through the second exhaust column.
The invention is further configured to: the mounting bracket be provided with two and arrange the both sides of confession thick liquid case in respectively.
Through adopting above-mentioned technical scheme, make two moulds can alternate heating and bear thick liquids, greatly promote production efficiency.
The invention is further configured to: the mould is provided with a filter screen for bearing paper pulp.
Through adopting above-mentioned technical scheme, supply the thick liquids case to pour into thick liquids into the mould, stay paper pulp on the mould through the filter screen, unnecessary moisture passes the filter screen, further promotes production efficiency, reduces the energy consumption.
The invention is further configured to: the machine frame is provided with a recovery tank which is positioned below the slurry supply tank.
Through adopting above-mentioned technical scheme, supply the thick liquids case to pour into thick liquids into the mould, stay most paper pulp on the mould through the filter screen, unnecessary moisture and little paper pulp pass the filter screen and pour into the recovery tank in to paper pulp recycle, further reduction in production cost.
In conclusion, the invention has the following beneficial effects:
1. the mould is arranged below the blanking pipe, the slurry in the slurry box is injected into the mould along the blanking pipe, the mould moves to a position between the upper fixing plate and the lower fixing plate, the power cylinder is started, the upper fixing plate is matched with the lower fixing plate, and the upper template is matched with the mould; the electric wire enters the heating plates from the wire inlet groove, passes through the wire placing groove, the first U-shaped groove and the second U-shaped groove and finally passes out of the wire outlet groove, the electric wire forms S-shaped wires on the wire placing groove, the first U-shaped groove and the second U-shaped groove together, a plurality of electromagnetic heating areas are formed on the heating plates, the mold is placed between the two heating plates because the electric wire does not generate heat, the mold can generate heat after the electric wire is electrified, and slurry is formed in the mold, the heating mode is not easy to damage and convenient to maintain, does not damage workers when being heated relative to a heat conduction pipe, and reduces heat loss and greatly reduces electric energy consumption because heat energy directly acts on the mold and the upper mold;
2. the exhaust fan is used for exhausting the water vapor, so that a production workshop can be kept dry and comfortable, and the environmental pollution caused by the overflow of the water vapor is avoided; and simultaneously, the service life of the electric element and the pneumatic element is prolonged.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic view showing a connection structure of the heating plate and the mounting frame;
FIG. 3 is a schematic plan view showing the heating plate;
fig. 4 is a schematic perspective view showing a heating plate.
Reference numerals: 1. a frame; 2. a support frame; 21. a slurry supply tank; 22. feeding the material tank; 23. a discharging pipe; 3. a recovery tank; 31. a collection box; 4. a mounting frame; 41. a power cylinder; 42. an upper fixing plate; 43. a lower fixing plate; 5. heating plates; 51. a wire inlet groove; 52. an outlet groove; 53. a first U-shaped slot; 54. a second U-shaped slot; 55. arranging a wire groove; 56. a compound wire slot; 57. an exhaust hole; 6. a steam removal mechanism; 61. an upper isolation box; 62. a lower isolation box; 63. an exhaust fan; 64. a first exhaust pipe; 65. and a second exhaust pipe.
Detailed Description
The invention is further described with reference to the accompanying drawings.
As shown in the figure, the independent flat electromagnetic heating pulp molding equipment comprises a frame 1, a mold and an upper template. The mold and the upper mold plate are prior art, and the description is omitted in this embodiment.
The mould is along the length direction sliding connection of frame 1 in frame 1, and the middle part of frame 1 is fixed with support frame 2, is fixed with in the top of support frame 2 and supplies thick liquid case 21, has a plurality of unloading jar 22 in the supply case. The slurry supply tank 21 is provided with a feed pipe 23 so that the feed tank 22 communicates with the feed pipe 23, and the feed pipe 23 is provided with a valve.
A filter screen (not shown) for carrying pulp is fixed to the mould. A recovery tank 3 is fixed on the frame 1, and the recovery tank 3 is positioned below the blanking pipe 23. A collection tank 31 is fixed to the frame 1 such that the collection tank 31 is positioned above the recovery tank 3. The mould is arranged in the collecting box 31, the pulp is injected into the mould along the discharging pipe 23, the pulp is remained on the mould, and the water and the small-particle pulp pass through the filter screen and enter the recovery tank 3 along the collecting box 31, so that the pulp can be recycled, and the production cost is reduced.
The rack 1 is fixed with mounting brackets 4, and the two mounting brackets 4 are respectively positioned at the left side and the right side of the support frame 2. The power cylinder 41 is fixedly connected to the mounting frame 4, and the power cylinder 41 is an oil cylinder. An upper fixing plate 42 is fixed below the power cylinder 41, and a lower fixing plate 43 corresponding to the upper fixing plate 42 is fixed to the frame 1.
The heating plate 5 is fixedly connected to both the upper fixing plate 42 and the lower fixing plate 43. The upper fixing plate 42 is fixedly connected with an upper mold plate matched with the mold. A heating plate 5 is located within the upper platen and the mold.
The heating plate 5 is provided with a wire inlet groove 51 and a wire outlet groove 52. The wire inlet groove 51 communicates with the side wall of the heating plate 5. The heating plate 5 is provided with a plurality of first U-shaped grooves 53, second U-shaped grooves 54 and wire placing grooves 55, and the first U-shaped grooves 53 and the second U-shaped grooves 54 are arranged at intervals. Both ends of the wire-placing groove 55 are respectively communicated with the first U-shaped groove 53 and the second U-shaped groove 54. The wire inlet groove 51 communicates with the first U-shaped groove 53 through a wire placing groove 55. The wire outlet groove 52 has one end communicating with the second U-shaped groove 54 and the other end communicating with the wire inlet groove 51.
This is the first coil of wire around the heating plate 5, which is arranged along the outer inner wall of the wire inlet groove 51, the inner wall of the first U-shaped groove 53, and the outer inner wall of the second U-shaped groove 54.
A multiple-line groove 56 is formed in the side wall of the line outlet groove 52, and the multiple-line groove 56 is communicated with the line inlet groove 51. The electric wire enters the heating plate 5 from the wire inlet groove 51, passes through the wire returning groove 56 along the wire placing groove 55, the first U-shaped groove 53 and the second U-shaped groove 54, passes through the wire inlet groove 51 again along the wire returning groove 56, passes through the wire outlet groove 52 along the wire placing groove 55, the first U-shaped groove 53 and the second U-shaped groove 54, and finally passes out of the heating plate 5 from the wire outlet groove 52. The wires are led to form S-shaped wiring on the wire placing groove 55, the first U-shaped groove 53 and the second U-shaped groove 54 for two times, and when the wires are electrified, an electromagnetic heating area is formed on the heating plate 5.
This is a second turn of wire around the heater plate 5, which is routed along the inside inner wall of the wire inlet slot 51, the outside inner wall of the first U-shaped slot 53, and the inside inner wall of the second U-shaped slot 54.
The heating plate 5 is provided with a plurality of air vents 57, and the air vents 57 are positioned between the wire inlet grooves 51 and the wire placing grooves 55 and/or between the wire placing grooves 55 and the wire outlet grooves 52. The frame 1 is provided with a steam removal mechanism 6.
The steam removing mechanism 6 includes an upper isolation box 61, a lower isolation box 62 and a suction fan 63. The upper isolation box 61 is driven by a hydraulic cylinder and is slidably connected to the mounting frame 4, and the upper fixing plate 42 is positioned in the upper isolation box 61.
The lower isolation box 62 is fixed on the frame 1, and the lower fixing plate 43 is positioned in the lower isolation box 62. The upper isolation box 61 is fitted with the lower isolation box 62. A first exhaust duct 64 of the exhaust fan 63 communicates with the side wall of the lower isolation box 62.
In order to further improve the steam removal efficiency. A guide plate positioned below the lower fixing plate 43 is fixed on the frame 1, and an accommodating cavity is enclosed among the plurality of guide plates. The lower fixing plate 43 is located in the accommodating chamber. A second exhaust duct 65 communicated with the accommodating cavity is fixed on the guide plate, and the second exhaust duct 65 is communicated with the first exhaust duct 64.
The mould is arranged below the blanking pipe 23, the slurry in the slurry supply tank 21 is injected into the mould along the blanking pipe 23, then the mould is moved to a position between the upper fixing plate 42 and the lower fixing plate 43, the power cylinder 41 is started, the upper fixing plate 42 is matched with the lower fixing plate 43, and the upper template is matched with the mould. The electric wire circular telegram forms a plurality of electromagnetic heating district on hot plate 5, can make mould and cope match-plate pattern generate heat, and thick liquids are shaping in the mould, and this kind of heating methods is not fragile and the maintenance of being convenient for, can not cause the injury to the workman for the heat pipe heating, and because heat direct action has reduced heat loss in mould and cope match-plate pattern, greatly reduces power consumption.
In the process that the heating plate 5 heats the die and the upper die plate, water vapor is filled in a space formed by the upper isolation box 61 and the lower isolation box 62, the exhaust fan 63 is started, and the water vapor is extracted from the space through the first exhaust pipe 64; simultaneously, take out the steam that holds the intracavity through second exhaust column 65, reduce the workshop temperature, prolong electrical components, pneumatic element's life simultaneously, avoid steam excessive to cause environmental pollution.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a dull and stereotyped electromagnetic heating paper pulp of stand alone type molding equipment, includes frame and mould, the length direction sliding connection of mould along the frame is in the frame, the frame on be fixed with the support frame, the support frame on be fixed with and supply the thick liquid case, supply thick liquid case intercommunication have unloading pipe, characterized by: the frame on be fixed with the mounting bracket, the mounting bracket on be provided with the power cylinder, the power cylinder is fixed with the upper fixed plate, the frame on be fixed with the bottom plate that corresponds with the upper fixed plate, upper fixed plate and bottom plate all be connected with the hot plate, the upper fixed plate be connected with mould complex cope match-plate pattern, the hot plate be located the cope match-plate pattern, the hot plate on seted up wire inlet groove, wire outlet groove, the lateral wall intercommunication of wire inlet groove and hot plate, the hot plate on seted up a plurality of first U-shaped grooves, second U-shaped groove and wire holding groove, the both ends of wire holding groove respectively with first U-shaped groove and second U-shaped groove intercommunication, wire inlet groove and first U-shaped groove intercommunication, wire outlet groove one end and second U-shaped groove intercommunication, the other end and wire inlet groove intercommunication.
2. A freestanding plate electromagnetic heating pulp molding apparatus as defined in claim 1, wherein: the side wall of the wire outlet groove is provided with a multiple wire groove which is communicated with the wire inlet groove.
3. A freestanding plate electromagnetic heating pulp molding apparatus as claimed in claim 1, wherein: the heating plate is provided with a plurality of exhaust holes, and the frame is provided with a steam removal mechanism.
4. A freestanding plate electromagnetic heating pulp molding apparatus as claimed in claim 3, wherein: the exhaust hole is positioned between the wire inlet grooves and the wire placing grooves and/or between the wire placing grooves and the wire outlet grooves.
5. A freestanding plate electromagnetic heating pulp molding apparatus as claimed in claim 3, wherein: the steam removal mechanism include separator box, lower separator box and air exhauster, last separator box sliding connection on the mounting bracket, an upper fixed plate is located the separator box, lower separator box be fixed in the frame, the bottom plate be located lower separator box, last separator box and lower separator box cooperation, the lateral wall intercommunication of first exhaust column and lower separator box of air exhauster.
6. The apparatus of claim 5, wherein the apparatus further comprises: the frame on be fixed with the guide board that is located the bottom plate below, it is a plurality of enclose between the guide board and become to hold the chamber, the bottom plate be located and hold the chamber, the guide board on be fixed with and hold the second exhaust column of chamber intercommunication, second exhaust column and first exhaust column intercommunication.
7. A freestanding plate electromagnetic heating pulp molding apparatus as claimed in claim 1, wherein: the mounting bracket be provided with two and arrange the both sides that supply the thick liquid case respectively in.
8. A freestanding plate electromagnetic heating pulp molding apparatus as defined in claim 1, wherein: the mould is provided with a filter screen for bearing paper pulp.
9. A freestanding plate electromagnetic heating pulp molding apparatus as claimed in claim 8, wherein: the machine frame is provided with a recovery tank which is positioned below the slurry supply tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210258717.0A CN114525704A (en) | 2022-03-16 | 2022-03-16 | Independent flat electromagnetic heating paper pulp molding forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210258717.0A CN114525704A (en) | 2022-03-16 | 2022-03-16 | Independent flat electromagnetic heating paper pulp molding forming equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114525704A true CN114525704A (en) | 2022-05-24 |
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ID=81625951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210258717.0A Pending CN114525704A (en) | 2022-03-16 | 2022-03-16 | Independent flat electromagnetic heating paper pulp molding forming equipment |
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| Country | Link |
|---|---|
| CN (1) | CN114525704A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995502A (en) * | 2012-12-19 | 2013-03-27 | 杭州欧亚环保工程有限公司 | Turnover size absorbing and forming method of plant fiber and turnover size absorbing and molding-forming machine |
| CN104822189A (en) * | 2015-05-13 | 2015-08-05 | 袁石振 | Conduit-type high-frequency electric heater unit, heating device, and heating method |
| CN211285069U (en) * | 2019-08-19 | 2020-08-18 | 李真健 | Inside two-way transfer structure of wet embryo of paper pulp molding |
| CN112127214A (en) * | 2020-10-22 | 2020-12-25 | 和煦(上海)环保科技有限公司 | Hot-press forming heating plate for pulp molding production equipment, manufacturing method of hot-press forming heating plate and pulp molding production equipment |
-
2022
- 2022-03-16 CN CN202210258717.0A patent/CN114525704A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995502A (en) * | 2012-12-19 | 2013-03-27 | 杭州欧亚环保工程有限公司 | Turnover size absorbing and forming method of plant fiber and turnover size absorbing and molding-forming machine |
| CN104822189A (en) * | 2015-05-13 | 2015-08-05 | 袁石振 | Conduit-type high-frequency electric heater unit, heating device, and heating method |
| CN211285069U (en) * | 2019-08-19 | 2020-08-18 | 李真健 | Inside two-way transfer structure of wet embryo of paper pulp molding |
| CN112127214A (en) * | 2020-10-22 | 2020-12-25 | 和煦(上海)环保科技有限公司 | Hot-press forming heating plate for pulp molding production equipment, manufacturing method of hot-press forming heating plate and pulp molding production equipment |
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