CN1307154A - Pulp-molding product mold process - Google Patents
Pulp-molding product mold process Download PDFInfo
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- CN1307154A CN1307154A CN 00111638 CN00111638A CN1307154A CN 1307154 A CN1307154 A CN 1307154A CN 00111638 CN00111638 CN 00111638 CN 00111638 A CN00111638 A CN 00111638A CN 1307154 A CN1307154 A CN 1307154A
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Abstract
The pulp-molding process includes the steps of: hydraulic crushing pulp board in beater into paper pulp while adding assistant in certain proportion; vacuum adsorbing pulp in vacuum adsorbing and molding workplace to wet stock and cold extrusion in vacuum adsorbing machine into deeply dewatered molded stock. hot pressing to set and crosslinking solidifying in hot press settinig machine into semi-finished product; and mold cutting and UV disinfection. The present invention has simplified molding process and structure.
Description
The present invention relates to a kind of moulding process of moulded paper pulp product, specifically is the technological process of making disposable food packing goods or other non-food stuff class packing material with paper pulp moulded section.
Along with the social demand of social development moulded paper pulp product in continuous expansion because its manufacturing technique is similar to paper-making industry, thereby also belong to the high energy consumption industry, but must produce in a large number again for adapting to social demand,, how to cut down the consumption of energy for this reason, become the extremely urgent problem of the sector.Because the unit consumption of the reduction energy is that economic benefit or social benefit all will be huge concerning enterprise.
In present paper pulp moulding technology flow process, the paper pulp for preparing is after vacuum is inhaled mold forming, and general moisture is more than 75%.At this moment, no matter be that direct heat is molded, still, moisture content is reduced to below 60% earlier by the drying tunnel baking, hot-forming then, wherein each gram water changes into steam, will absorb 3000 joule's heat energies in theory, and it is big to this shows that energy consumes.
The object of the present invention is to provide a kind of can cutting down the consumption of energy, particularly reduce the moulding process of moulded paper pulp product of the unit consumption of the energy.
The objective of the invention is to adopt following technical proposals to realize: a kind of moulding process of moulded paper pulp product, be characterized in, may further comprise the steps:
(1). pulpboard after beater waterpower is pulverized, is added auxiliary agent with certain proportion, stir and form paper pulp;
(2). above-mentioned paper pulp is delivered to vacuum through pipeline inhales the mold forming station, inhale mould machine vacuum suction preliminary hydro-extraction moulding via vacuum and make wet base, and when carrying out the vacuum draw dehydration, wet base carries out cold extrusion in the upper and lower mould of vacuum suction mould machine, makes wet base further be dehydrated into parison;
(3). above-mentioned parison through deep dehydration is transferred to the thermocompression forming machine with conveyer belt, makes thermocompression forming, crosslinking curing is made semi-products;
(4). through the semi-products of HEAT SETTING and curing die-cutting machine shape by die-cutting,, obtain the disposable food packing goods of tool certain volume shape again through ultraviolet radiation for sterilizing and disinfecting.
The moulding process of above-mentioned moulded paper pulp product, wherein, the moisture of described paper pulp is 98%～99.5%.
The moulding process of above-mentioned moulded paper pulp product, wherein, described pulpboard raw material comprises: xylophyta fiber such as draft such as reed, bagasse, straw, rice bar or bamboo and wood.
The moulding process of above-mentioned moulded paper pulp product, wherein, described auxiliary agent comprises: waterproofing agent, oil-proofing agent or wet strength agent can be selected from wherein a kind of or several.Described auxiliary agent (in the dry pulp percentage by weight) ratio is: waterproofing agent 5～8%, oil-proofing agent 0.8～1.2%, wet strength agent 1～3%.
The moulding process of above-mentioned moulded paper pulp product, wherein, the suction negative pressure that described vacuum is inhaled mold forming is 0.04～0.07Mpa.
The moulding process of above-mentioned moulded paper pulp product, wherein, the upper and lower mould cold extrusion pressure that described vacuum is inhaled the mould machine is 0.5～1Mpa.
The moulding process of above-mentioned moulded paper pulp product, wherein, described heat pressing forming machines hot pressing is by force 1～1.5Mpa, temperature is 130～150 ℃, and the counterdie temperature is higher than the patrix temperature more than 10 ℃.Wherein, described thermocompression forming machine hot pressing time is 20～30 seconds.
Compared with prior art, advantage of the present invention is conspicuous:
1. cut down the consumption of energy
In existing paper pulp moulding technology flow process, the paper pulp for preparing is after vacuum is inhaled mold forming, moisture is more than 75%, and the present invention adopts the further cold extrusion of the parison of moisture more than 75%, and dehydration is to about 60%, disposable lunch-box with 600ml mess tin 25g dry weight is an example, only need to consume a spot of mechanical energy, can reach more than the 50g, promptly afterwards in the operation through the clean dehydration of cold extrusion, can consume 150000 joule's heat energies less, every cutlery box reduces cost 0.03 yuan.
2. reduce auxiliary agent and run off, conserve water, reduce production costs significantly
The present invention is at disposable food packing goods such as cutlery box, owing to significantly reduced the loss of auxiliary agent, and the cost of this based article is minimized significantly in the manufacturing process of instant noodle bowl, pallet etc.Because different instructions for uses according to goods, when joining slurry, different auxiliary agents will be added, no matter parison after inhaling mold forming is direct hot-pressing drying crosslinking curing, still earlier by hot repressing drying after the drying tunnel baking, solidifying and setting, the capital has part of auxiliary to go out hot-die with high pressure high temperature vapor, to the air discharging, causes the lost waste power of some auxiliary agent.Adopt vacuum to inhale mold technique, the direct cold extrusion of chance that can utilize upper and lower mould to shift, the plain boiled water of extruding returns white water chest with vacuum draw, water source when making this plain boiled water that gives off when partly plain boiled water is inhaled mould with vacuum join slurry as next circulation, so, the slurries of next circulation, the auxiliary agent of its interpolation can reduce ratio; Not only but the conserve water resource also can be saved the very big auxiliary agent of value, and economic benefit is tangible.By this measuring and calculating, the production line of 50000 mess tins of a daily output, the 2500kg that can economize on water every day saves 500 yuan of auxiliary agent expenses.
3. simplify working process, enhance productivity greatly
The present invention is owing to inhale the die worker position in vacuum, suction mould and top transfer mold are finished cold extrusion under directly utilizing, thereby can simplify moulding process and structure, make equipment with the shortest time, minimum energy resource consumption obtains the very low base of moisture, very is suitable for large quantities of a large amount of productions of automation, semi-automation.
The invention will be further described below in conjunction with flow chart:
Fig. 1 is a process chart of the present invention;
Fig. 2 is the structural scheme of mechanism that vacuum used in the present invention is inhaled the mould machine.
Referring to Fig. 1, the present invention is a kind of moulding process of moulded paper pulp product, may further comprise the steps:
(1) at first will pulverize through beater waterpower, make the moisture of paper pulp reach 98%～99.5% by the annual herb plant as the pulpboard that xylophyta fibers such as draft such as reed, bagasse, straw, rice bar or bamboo and wood are made; Product requirement adds auxiliary agent by a certain percentage again, and auxiliary agent generally comprises: waterproofing agent, oil-proofing agent or wet strength agent, can select wherein a kind of or several for use according to the needs of different product; Wherein the ratio of auxiliary agent (by the dry pulp percentage by weight) is generally: waterproofing agent 5～8%, oil-proofing agent 0.8～1.2%, wet strength agent 1～3%.
(2). above-mentioned paper pulp is delivered to vacuum through pipeline inhales the mold forming station, inhale mould machine vacuum suction preliminary hydro-extraction moulding via vacuum and make wet base, and when carrying out the vacuum draw dehydration, wet base carries out cold extrusion in the upper and lower mould of vacuum suction mould machine, makes wet base further be dehydrated into parison;
In the cold extrusion operation, it is to inhale mould with 0.04～0.07Mpa suction vacuum that vacuum is inhaled the mould machine, and paper pulp absorption is shaped, utilize former suction mould to be counterdie again, shift mould above utilizing and be patrix, extrusion dehydration is 2～5 seconds about the warp, the extruding force that applies is by the goods projected area, and pressure is generally 0.5～1Mpa; Continue suction moisture content simultaneously, make goods reach 50～60% moisture, deliver to the typing of thermocompression forming station hot-pressing drying then.
The structure of suction mould machine used in the present invention as shown in Figure 2; it comprises: inhale mould platform 3 on a frame (not shown), the little stock tank 8,, inhale mould platform 6 once and be located at the upper and lower mould 4,5 of upper and lower suction mould platform respectively, wherein; patrix 4 is last suction die, and counterdie 5 is following suction punch.Should go up suction mould platform 3 and be connected on the traversing guide pillar 2, and be supported on the frame by a guide pillar stand-off 1; Under inhale mould platform 6 and be connected on the lifter drawing bar 7, be supported in (not shown) on the frame by a pull bar stand-off, the even pore air flue that is furnished with on patrix and the counterdie.
This forming method when vacuum is inhaled mould, is that punch is inhaled mould as counterdie, and vacuum is 0.7～0.4kg/cm
2, imitate fruit in order to guarantee to inhale, under inhale to apply on the punch 5 and cover two layers of silk screen (not shown), wherein, the upper strata is the 30-40 order, lower floor is the 10-20 order, with upper strata 40 orders, lower floor's 12 orders are for well; For guaranteeing effect on moisture extraction and help the demoulding, on inhale also to apply on the die 4 and cover 30～40 purpose silk screens.
During work, after inhaling mold forming, following suction punch 5 rises, inhale in the die 4 in the insertion, in type parison is squeezed in the centre, simultaneously vacuum draw, the water that slurry squeezes out is in time drained, afterwards, and lower punch 5 declines (this moment, parison was transferred in the lower cavity die 4), enter little stock tank 8, the suction moulding, and upper cavity die laterally moves, and goods are migrated out machine, put on the belt, be transferred to next station.
(3). above-mentioned parison through the extruding deep dehydration is transferred to the hot-working machine with conveyer belt, and through the hot press typing, crosslinking curing is made semi-products;
(4). through the semi-products of HEAT SETTING and curing die-cutting machine shape by die-cutting,, finish the whole production flow process, can make disposable food packing goods such as mess tin, pallet, instant noodle bowl again through ultraviolet radiation for sterilizing and disinfecting.
Above-mentioned through the parison of cold extrusion dehydration to 50～60% moisture, (hot pressing is finished dry and the crosslinking curing typing after being 1～1.5Mpa) 20 second by force, and end article thickness is about 0.6～0.8mm through 130～150 ℃ of the hot press mould table temperature mould heat pressure up and down of (the counterdie temperature is higher than the patrix temperature more than 10 ℃).Around here, the pressure ratio cold extrusion of hot press is twice.
Like this, the present invention inhales the die worker position in vacuum, suction mould and top transfer mold are finished cold extrusion under directly utilizing, simplify moulding process and structure, make equipment with the shortest time, minimum energy resource consumption obtains the very low base of moisture, very is suitable for large quantities of a large amount of productions of automation, semi-automation.
The heating of the hot pressing die of this forming method can be used electrical heating, also can use hot oil furnace, heats the conduction oil as heating agent with coal, diesel oil, natural gas, liquefied gas, again by heat-conducting oil heating hot press mould.
When producing the disposable packaging of household electrical appliances, electromechanics or other non-food stuff classes, at goods after cold extrusion dehydration, just directly enter continuous tunnel type drying tunnel, through hyperthermia drying, typing, this based article need not add the auxiliary agent waterproofing agent substantially by instructions for use, auxiliary agent such as oil-proofing agent and wet strength agent is also removed the sterilizing program simultaneously from.
Claims (11)
1. the moulding process of a moulded paper pulp product is characterized in that, may further comprise the steps:
(1). pulpboard after beater waterpower is pulverized, is added auxiliary agent with certain proportion, stir and form paper pulp;
(2). above-mentioned paper pulp is delivered to vacuum through pipeline inhales the mold forming station, inhale mould machine vacuum suction preliminary hydro-extraction moulding via vacuum and make wet base, and when carrying out the vacuum draw dehydration, wet base carries out cold extrusion in the upper and lower mould of vacuum suction mould machine, makes wet base further be dehydrated into parison;
(3). above-mentioned parison through deep dehydration is transferred to the thermocompression forming machine with conveyer belt, makes thermocompression forming, crosslinking curing is made semi-products;
(4). through the semi-products of HEAT SETTING and curing die-cutting machine shape by die-cutting,, obtain the disposable food packing goods of tool certain volume shape again through ultraviolet radiation for sterilizing and disinfecting.
2. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: the moisture of described paper pulp is 98%～99.5%.
3. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: described pulpboard raw material comprises: xylophyta fiber such as draft such as reed, bagasse, straw, rice bar or bamboo and wood.
4. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: described auxiliary agent comprises: waterproofing agent, oil-proofing agent or wet strength agent can be selected from wherein a kind of or several.
5. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: described auxiliary agent (by the dry pulp percentage by weight) is: waterproofing agent 5～8%, oil-proofing agent 0.8～1.2%, wet strength agent 1～3%.
6. the moulding process of moulded paper pulp product according to claim 1 is characterized in that: the suction negative pressure that described vacuum is inhaled mold forming is 0.04～0.07Mpa.
7. the moulding process of moulded paper pulp product according to claim 1 is characterized in that: the upper and lower mould cold extrusion pressure that described vacuum is inhaled the mould machine is 0.5～1Mpa.
8. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: described heat pressing forming machines hot pressing is by force 1～1.5Mpa, and temperature is 130～150 ℃, and the counterdie temperature is higher than the patrix temperature more than 10 ℃.
9. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: the pressure of described heat pressing forming machines is twice than cold extrusion.
10. the moulding process of moulded paper pulp product according to claim 1, it is characterized in that: described thermocompression forming machine hot pressing time is 20～30 seconds.
11. the moulding process of moulded paper pulp product according to claim 1 is characterized in that: described mould is that the time of upper and lower mould extrusion dehydration is 2～5 seconds, continues suction moisture content simultaneously, makes goods reach 50～60% moisture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111638 CN1124381C (en) | 2000-01-31 | 2000-01-31 | Pulp-molding product mold process |
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|---|---|---|---|
| CN 00111638 CN1124381C (en) | 2000-01-31 | 2000-01-31 | Pulp-molding product mold process |
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| CN1307154A true CN1307154A (en) | 2001-08-08 |
| CN1124381C CN1124381C (en) | 2003-10-15 |
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| CN 00111638 Expired - Fee Related CN1124381C (en) | 2000-01-31 | 2000-01-31 | Pulp-molding product mold process |
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