CN104262979A - Pressing equipment adopted in method for making molded part and raw material mixture thereof - Google Patents
Pressing equipment adopted in method for making molded part and raw material mixture thereof Download PDFInfo
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- CN104262979A CN104262979A CN201410397503.7A CN201410397503A CN104262979A CN 104262979 A CN104262979 A CN 104262979A CN 201410397503 A CN201410397503 A CN 201410397503A CN 104262979 A CN104262979 A CN 104262979A
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Abstract
The invention relates to pressing equipment adopted in a method for making a molded part and a raw material mixture thereof. A moldable mixture does not contain formaldehyde, a hardening agent, an impact-resistant modifier or a co-solvent, and has the characteristics of low water content and the like; the molded part produced through the method for making the molded part has high stretching viscosity and uniform density, and thermal treatment and fumigation are not required; through adoption of the molded part pressing equipment, automatic implementation of the method is realized, and labor force is reduced; and the pressing equipment has the characteristics of high speed and the like.
Description
Technical field
The present invention relates to a kind of moulded product raw mixture, making the method for moulded product and the pressing device for making this moulded product, belong to Wastes of Crops and reclaim field.
Background technology
Supporting plate is the smooth traffic structure be made up of timber, plastics, paper, metal and matrix material, in order to support various article, supporting plate can facilitate the lifting of article and put simultaneously, in addition, in transportation, supporting plate can reduce the amplitude of article vibration, improves the serviceability rate of article.
Now, the whole world manufactures more than 1,000,000,000 supporting plates every year according to statistics, and wherein the supporting plate of 93% is directly made up of timber, and owing to adopting timber as its raw material, a large amount of forests is cut down in every annual meeting, and it is acknowledged as one of principal element causing Global warming.Test according to international cancer research institution, use melamine urea formaldehyde (Melamine Urea Formaldehyde, MUF) or urea formaldehyde (Urea Formaldehyde, UF) may health risk as the compression plank of tackiness agent.Except above-mentioned environmental problem, bunk also can propagate quarantine pest insect in the process of transport, therefore all bunks all need to heat-treat or suffocating treatment to prevent insect from being propagated by the transport of bunk.Regrettably, not all types of timber all can be heat-treated or suffocating treatment, and its major cause is, carrying out using a certain amount of chemical substance in this treating processes, this writes chemical substance and can affect to the health of human body.
Due to the shortcoming of above-mentioned use wood package materials, the alternative material as plastics, metal, matrix material now can be adopted.But both not environmentally, its cost is also relatively high for these wrapping material.For example, plastic support plate needs the ability degraded more than 100 years.Plastics and its cost of metal supporting plate relatively high, its weight is also very heavy.Because oil price reaches new peak, so use plastics and metal supporting plate no longer will save cost, particularly by air transportation article, because expense more may concentrate in the weight of packaged goods.
Known open type method of moulding is mainly used to manufacture flat thin plate or sheet material.Because along periphery without assembled wall, solid model goods need rest and reorganize and have relatively low density usually.Matrix material used in the method only needs to add low levels tackiness agent and without the need to using packing material and flow improver.But the main drawback of open type moulded product is that the profile of moulded product is limited to flat thin plate and usually has standard size.Because the loss of resting and reorganizing caused by 4 edges is also relatively high.With regard to material use efficiency, its loss is larger.
Compared with open type method of moulding, by the product of typical closed mold method manufacture, there is relatively high density and the more complex outline of moulded product can be produced.Because without the need to edge of resting and reorganizing, Gu there is not the problem of spillage of material yet.But most of known closed mold product still depend on use cost higher and metal not environmentally and plastics.As patent publication No. for the alternative method described in (WO2005/120787 and WO/2005/120967) can molded mixture to use xylon to be formed as basic material.Need in this method to use melamine urea formaldehyde as tackiness agent.Containing relatively large formaldehyde in its finished product made, and formaldehyde can affect to environmental and human health impacts.
Used can also needing to use soy extract as releasing agent by molded mixture in WO2005/120787 and WO/2005/120967, so that moulded product shifts out from mould, also needs to use monkey grass as shock resistance transformation of the way agent to provide shock absorption to moulded product.Because use liquid adhesive, thus according to these methods can the moisture content of molded mixture also relatively high.Because the product that xylon is molded has lower impact and flexural strength usually.In order to manufacture the product with required character (such as HI high impact and flexural strength, high-density), using other additives to be formed by these methods can molded mixture, also need a large amount of liquid to promote can molded mixture flowing in a mold to form required profile and intensity.
Use a large amount of liquid adhesive to promote and can the shortcoming that flows in molding processes of molded mixture comprise: high-content moisture a) gasified during molding processes increases the pressure in molded mixture, simultaneously when opening mould, increase the risk of moulded product layering due to the pressure discharged suddenly; B) liquid adhesive has high-moisture, dilutes the concentration of tackiness agent to a certain extent, and then causes the pressing mold time longer, also needs stiffening agent to carry out acceleration sclerosis to guarantee that moulded product fully hardened in a mold before it is discharged simultaneously; If c) discharge not in time and can produce high pressure via moisture/liquid gasification process, this pressure and likely cause the blast of mould, therefore, must be incorporated in die design by pressure vent, make the structure of mould more complicated; D) usually cause mouldy very soon with the moulded product of the method manufacture, thus make moulded product generation warpage; E) need to overflow in molding process to make excessive moisture/steam by repeatedly opening and closing mould.
In addition, the method disclosed in WO2005/120787 and WO/2005/120967 uses ammonium chloride to harden in a mold, because can have high moisture content by molded mixture before it is discharged to make moulded product as stiffening agent.Stiffening agent is easy to sclerosis and therefore must avoids high temperature in known method of moulding under high temperature.In addition, soy extract is also used as releasing agent to promote discharge process.Soy extract may can not promote the bonding between the wooden cell of xylon to use the main drawback of soy extract to be.Therefore more liquid adhesives are needed to provide required cementing property.But, use more tackiness agents, more formaldehyde will be released during molding process.
Another alternative method reaching required moulded product be to use there is low moisture content can molded mixture.But, if the material being difficult to flow in molding cavity under low moisture content can be contained by molded mixture, be then difficult to the molded product had compared with complex outline.In addition, water-content is lower, and its stretch ratio is lower.Stretch ratio is can the molded mixture index of degree that can flow in sealed mold.
Summary of the invention
In order to solve prior art Problems existing, the invention provides pressing device and raw mixture thereof that a kind of method making moulded product adopts, wherein can not contain formaldehyde, stiffening agent, shock resistance modification agent, cosolvent, the features such as its water content is low by molded mixture; The moulded product produced by the method for this making moulded product has that stretch-bonded degree is high, even density, and without the need to heat-treating and fumigating; Moulded product pressing device, the automatization achieving present method is implemented, and reduces artificial, has the features such as speed is fast.
The technical solution adopted in the present invention:
About moulded product mixture:
One can molded mixture, comprise tackiness agent, short stream packing material and agricultural fibre, the weight of described tackiness agent account for described can the 3%-7% of molded mixture gross weight, described tackiness agent comprises vulcabond-ditane, and described agricultural fibre comprises bamboo fibers.
Preferably, described agricultural fibre also comprises non-bamboo fibers, and described non-bamboo fibers adopts any one or a few composition material following to form, and described material comprises rice straw, rape stalk, cotton stalk and wheat stalk.
Usually, the weight ratio of described bamboo fibers and described non-bamboo fibers can be 0.6-4.
Preferably, described short stream packing material is wheat-flour, the weight of described short stream packing material account for described can the 8%-10% of gross weight of molded mixture.
Further, the major ingredient of described tackiness agent can be Examples of soy adhesives.
About making the method for moulded product by molded mixture:
The method of moulded product can be made by molded mixture, comprise the following steps:
A. agricultural fibre, tackiness agent and short stream packing material is prepared;
B. described agricultural fibre, described tackiness agent and described short stream packing material being mixed to form can molded mixture, and described tackiness agent and described short stream packing material spray in agricultural fibre by wherein said being mixed under the pressure of 0.5Mpa-0.8Mpa;
C. concussion is described can molded mixture;
D. compression is described can form moulded product by molded mixture.
Preferably, in step c, this concussion for can be disposed in weighing hopper by molded mixture by discharge screw rod by described, and can be disposed to load weighted in feedback charging tray by molded mixture by this weighing hopper.
Described feedback charging tray forms by the compartment of some settings in column in a row.
Preferably, the quantity of described feedback charging tray is 2, be followed successively by transfer feedback charging tray and transfer feedback charging tray, weighing hopper first can be disposed in transfer feedback charging tray by molded mixture, and now, described transfer feedback charging tray is positioned at immediately below described transfer feedback charging tray, transfer feedback charging tray by its inside can molded mixture be transferred to transfer feedback charging tray in, transfer feedback charging tray moves in mould, and can be transferred in mould by molded mixture by its inside, prepares for compression forms moulded product.
Further, transfer feedback charging tray can after molded mixture be transferred to mould by its inside, and described transfer feedback charging tray can return to described transfer and present immediately below charging tray.
Preferably, transfer in mold process at described transfer feedback charging tray, its inside can be transferred in mold process and transfer feedback charging tray is back to immediately below transfer feedback charging tray in process by molded mixture by transfer feedback charging tray, described weighing hopper can be disposed in transfer feedback charging tray by molded mixture.
Preferably, that can hold one-period in described mould can molded mixture, described one-period can molded mixture be double can be disposed to its inside in described mould by molded mixture of described transfer feedback charging tray.
Preferably, described one-period can first time transfer feedback charging tray in molded mixture by its inside can molded mixture be transferred to mould after to present charging tray to second time transfer its inside before molded mixture is transferred to mould, can be put into net formula bamboo weaving in described mould.
Usually, the laying method of described net formula bamboo weaving can be artificial manual placement, or automatically can be placed by mechanical manipulator.
Usually, described net formula bamboo weaving can erect bamboo cane by many horizontal bamboo canes and Duo Gen and works out.
Further, can be parallel to each other between many described horizontal bamboo canes, spacing between two described horizontal bamboo canes of arbitrary neighborhood can be equal, can be parallel to each other between many described perpendicular bamboo canes, spacing between two described perpendicular bamboo canes of arbitrary neighborhood can be equal, and the angle between described horizontal bamboo cane and described perpendicular bamboo cane is 90 °.
Further, the spacing between adjacent two described horizontal bamboo canes can be equal with the spacing between adjacent two described perpendicular bamboo canes.
Preferably, compression is described can molded mixture be that this press time is 60s-240s with the compacting of single compressed stroke.
The stretch ratio of described single compressed stroke can be 1-10.
Preferably, in steps d, simultaneously for this process heats, described Heating temperature is 200 DEG C-230 DEG C.
In steps d, its pressure can be 3Mpa-4Mpa.
About moulded product pressing device:
A kind of moulded product pressing device, comprise concussion blanking device and heat pressing forming machines, described concussion blanking device comprises can the hopper of molded mixture, weighing hopper and filling place for storing, described weighing hopper is arranged on the exit of described hopper, described filling place is arranged on immediately below described weighing hopper, described filling place is provided with moveable transfer feedback charging tray, described transfer feedback charging tray has two stations, wherein the first station is positioned on the filling place at place immediately below described weighing hopper, and the second station is positioned at the inlet place of described heat pressing forming machines.
Preferably, be also provided with transfer between described filling place and described weighing hopper and present charging tray, and described transfer feedback charging tray is positioned at directly over described first station.
Preferably, described transfer feedback charging tray and described transfer feedback charging tray all can be described as feedback charging tray, be equipped with some horizontal strokes in two described feedback charging trays, be longitudinally set with the vertical parting bead put, described feedback charging tray internal space is divided into several compartments by some described tabula bars and some described mediastinum bars.
Further, compartment described in several can setting in column in a row, is positioned at the upper and lower one_to_one corresponding of some compartments that charging tray is presented in some compartments of the transfer feedback charging tray of the first station and described transfer.
The bottom of described hopper can also be provided with discharge screw rod, the quantity of described discharge screw rod, the quantity of described weighing hopper are all equal with the row of described compartment, row are arranged to before and after some described discharge screw rods, be set in parallel in same plane between some described discharge screw rods, the discharge gate place of each described discharge screw rod arranges a corresponding weighing hopper, and each described weighing hopper and described transfer are presented one of charging tray to arrange described compartment corresponding.
Described transfer feedback charging tray can be installed in orbit by roller, and in the frame of described track fixed installation earthquake blanking device, described track arranged transversely, described roller drives by stepper-motor or servomotor.
Further, four angles of two described feedback charging trays all can be provided with vibrator, and described vibrator is vertical direction vibrator.
The bottom of two described feedback charging trays can all be provided with can the flashboard of molded mixture for discharging, and described flashboard is plugged on the bottom of described feedback charging tray.
Preferably, described transfer feedback charging tray moves preferably by crawler belt, and described crawler belt is arranged on the bottom of described transfer feedback charging tray.
Preferably, described heat pressing forming machines comprises the mold and bed die of working in coordination, and described bed die is heating mould.
Beneficial effect of the present invention:
Can molded mixture part:
Due to the tackiness agent that can use in molded mixture relative to existing tackiness agent not containing formaldehyde, can available protecting staff, transport, the health of user of service, people are made to avoid being subject to the invasion of formaldehyde, on the other hand only account for can the 3%-7% of molded mixture gross weight for the weight of tackiness agent, owing to containing a certain amount of moisture in tackiness agent, by ensure can the tackiness agent of low levels in molded mixture, can carry out in molding process by molded mixture utilizing this, relatively can reduce the pressure that moisture vaporization discharges, the risk that layering appears in suppressed moulded product can be reduced on the one hand, improve its good article rate, pressure on the other hand due to its gasification is less, the possibility that mould is blasted because pressure is excessive can be prevented.
Agricultural fibre comprises bamboo fibers, due to the characteristic of bamboo fibers self, can after molded mixture be pressed into moulded product, moulded product need be departed from from mould, and adding of bamboo fibers, the slipperiness of molded article surface can be increased, thus facilitate moulded product break away from moulds, on the other hand, can avoid to adding releasing agent in molded mixture.
Of the present inventionly without the need to adding stiffening agent, shock resistance modification agent, releasing agent and cosolvent in molded mixture, certain degree can reduce cost of the present invention.
Short stream packing material adopts wheat-flour, replaces original Tapioca Starch by wheat-flour, and because the cost of Tapioca Starch is relatively high, Tapioca Starch is not containing seitan, therefore Tapioca Starch is more crisp as the moulded product made by packing material.And by wheat-flour as short stream packing material, owing to containing gluten, its moulded product made in wheat-flour, utilize gluten molecules to be cross-linked to form the submicroscopic net giving product structure.This allows bubble residence in complete structure, produces the moulded product with the ground of ductility, thus the stability of enhancement mode goods and work-ing life.
About making the method for moulded product by molded mixture:
Present method by mixing step can short mix obtain can molded mixture, and can be sent in heat pressing forming machines and carry out suppressing and generating moulded product by molded mixture by the mode of concussion.After the moulding without the need to heat-treating or suffocating treatment moulded product, the compactness extent of the moulded product obtained is high and quality light, thus can be molded the moulded product compared with heavy thickness.
Can be sent in weighing hopper by molded mixture by discharge screw rod, the setting of discharge screw rod, by controlling the number of turns of discharge bolt rotary and speed thus realize controlling can the accurate conveying of molded mixture, prevents the specification disunity of pressing die goods.
The special construction of feedback charging tray, by weighing hopper in each compartment, inject equivalent can molded mixture, thus make relatively uniform being arranged in of molded mixture to present in charging tray, can after molded mixture transfers to mould by feedback charging tray, can be uniformly distributed by molded mixture in indirect guarantee mould, makes the final moulded product consistency of thickness everywhere extruded.
The setting of net formula bamboo weaving, make in the moulded product of final compacting containing this net formula bamboo weaving, make the stability of the moulded product entirety obtained stronger, by can cohesive force between molded mixture and net formula bamboo weaving, the resistance to compression of the moulded product finally obtained and tensile resistance are significantly improved, simultaneously can also the generation of phenomenon of mode moulded product cracking.
Injecting in mould twice can molded mixture, and between this twice, put into net formula bamboo weaving, can ensure that net formula bamboo weaving in the moulded product finally obtained is in the inside of moulded product, ensures the attractive in appearance of moulded product.
The setting of transfer feedback charging tray and transfer feedback charging tray, relatively can reduce and can insert cycle time of mould by molded mixture, can prevent can molded mixture in a mold due to overlong time, cause be pressed into moulded product quality to go wrong, improve the good article rate of moulded product.
Accompanying drawing explanation
Fig. 1 is the structural representation of moulded product pressing device;
Fig. 2 is the vertical view of feedback charging tray;
Fig. 3 is the upward view of feedback charging tray;
Fig. 4 is the structural representation of feedback charging tray;
Fig. 5 is the design sketch of feedback charging tray without concussion function;
Fig. 6 is the design sketch that feedback charging tray has concussion function;
Fig. 7 is compression molded front schematic diagram;
Fig. 8 be compression molded after schematic diagram.
Embodiment
About can molded mixture:
The present invention relates to one can molded mixture, comprises tackiness agent, short stream packing material and agricultural fibre.
Described tackiness agent is tackiness agent based on soybean or vulcabond-ditane (MDI); tackiness agent has high viscosity; the features such as moisture content is low; owing to not containing formaldehyde in tackiness agent; can available protecting staff, transport, user of service health, make people avoid being subject to the invasion of formaldehyde.
Here it should be noted that, described tackiness agent can be pure vulcabond-ditane (MDI), or described tackiness agent can be Examples of soy adhesives purely, or described tackiness agent is that vulcabond-ditane (MDI) mixes with Examples of soy adhesives and forms, the proportioning of the vulcabond-ditane (MDI) in the tackiness agent that this mixing is formed with Examples of soy adhesives is not construed as limiting.
Due to the full-bodied feature of tackiness agent, effectively can control the usage quantity of tackiness agent, can by the weight control of tackiness agent can in the 3%-7% (as: 3%, 5%, 6%, 7% etc.) of molded mixture gross weight, can reduce to a certain extent can the content of moisture in molded mixture, for later use can provide favourable condition by molded mixture pressing die goods.
Bamboo fibers and non-bamboo fibers is comprised in agricultural fibre, the wherein setting of bamboo fibers, utilize the characteristic of bamboo fibers self, after molded mixture is pressed into moulded product, moulded product need can departed from from mould, and the adding of bamboo fibers, the slipperiness of molded article surface can be increased, thus facilitate moulded product break away from moulds, on the other hand, can avoid to adding releasing agent in molded mixture.
About the concrete composition of non-bamboo fibers, the present invention does not do concrete restriction, and common agricultural straw all can become the starting material (as: rice straw, rape stalk, cotton stalk and wheat stalk etc.) of non-bamboo fibers.
It is emphasized that at this, non-bamboo fibers can adopt any one or a few the combination in rice straw, rape stalk, cotton stalk and wheat stalk, about the non-bamboo fibers that several combination of raw materials is formed, the proportioning between these several starting material, the present invention is not construed as limiting.
About the proportioning of bamboo fibers and non-bamboo fibers, the weight ratio of described bamboo fibers and described non-bamboo fibers is 0.6-4, ensures that bamboo fibers has higher content, indirectly ensures the slipperiness of the moulded product suppressed.
Here also it should be noted that, first pre-shaping step need be carried out for agricultural fibre, this pre-shaping step is, agricultural fibre is carried out cutting process, the cut to lengthen of the agricultural fibre after cutting is between 5-10mm, and then drying treatment is carried out to agricultural fibre, concrete cutting method and drying means are common method, do not describe at this.
Described short stream packing material is wheat-flour, the weight of described short stream packing material account for described can the 8%-10% of gross weight of molded mixture.
Short stream packing material adopts wheat-flour, replaces original Tapioca Starch by wheat-flour, and because the cost of Tapioca Starch is relatively high, Tapioca Starch is not containing seitan, therefore Tapioca Starch is more crisp as the moulded product made by packing material.And by wheat-flour as short stream packing material, owing to containing gluten, its moulded product made in wheat-flour, utilize gluten molecules to be cross-linked to form the submicroscopic net giving product structure.This allows bubble residence in complete structure, produces the moulded product with the ground of ductility, thus the stability of enhancement mode goods and work-ing life.
Finally be mixed to form can the overall and moisture of molded mixture should lower than 8%, wherein should account for can the 85%-95% of molded mixture gross weight for the weight of agricultural fibre.
Also it should be noted that can without the need to adding stiffening agent, shock resistance transformation of the way agent, cosolvent and releasing agent in molded mixture, and reduce the usage quantity of chemical substance, can relatively reduce cost of the present invention, improve the security of moulded product, protection personnel's is healthy.
About making the method for moulded product by molded mixture:
Comprise: step (preparing agricultural fibre, tackiness agent and short stream packing material) 1) is provided;
2) mixing step (described agricultural fibre, described tackiness agent and described short stream packing material are mixed to form can molded mixture);
3) step (concussion described can molded mixture) is shaken;
4) compression molded step (compression described can molded mixture form moulded product).
About providing step, get out tackiness agent, short stream packing material and agricultural fibre, and agricultural fibre to be cut and dry, its concrete steps in a specific embodiment " about can molded mixture " illustrate complete, do not repeat them here.
About mixing step, this mixing step comprises two steps, the first step: agricultural fibre and short stream packing material are put into mixing machine and mixes, be provided with the blade (4 are arranged on the blade in rotating shaft) horizontally rotated in mixing machine, its rotating speed is 20-30r/min; Second step: in the process of mixing, spray in agricultural fibre by the mode of spraying by tackiness agent, this process mixing machine is still carrying out mixing process, and spraying pressure is 0.5Mpa-0.8Mpa.
Mixing step is not limited to aforesaid way, and short stream packing material also can adopt the mode of injection to spray in agricultural fibre, and it adopts spray regime identical with the spray regime of tackiness agent.
It should be noted that at this, the duration needed for whole mixing step is at least 3min (usually can not more than 5min).
About concussion step:
Hopper can be put into by molded mixture, can send in weighing hopper by molded mixture by the discharge screw rod bottom hopper, weighing hopper by its inside can molded mixture be disposed to feedback charging tray in, feedback charging tray transfers in mould, and its inside can be transferred in mould by molded mixture, feedback charging tray is in concussion always.
Can send in weighing hopper by molded mixture by discharge screw rod, the setting of discharge screw rod is by controlling the number of turns of discharge bolt rotary and speed thus realize controlling can the accurate conveying of molded mixture, specifically, just started in weighing hopper conveying can molded mixture time, the rotating speed of screw rod is very fast, have in weighing hopper can the weight of molded mixture close to (being generally 80% of set(ting)value) during set(ting)value, the rotating speed of screw rod reduces, until the weight of molded mixture set(ting)value can be reached in weighing hopper, screw rod stops operating, realizing accurately controlling by such mode can the accurate injection of molded mixture, the specification disunity of pressing die goods can be prevented further.
See Fig. 5 and Fig. 6, weighing hopper be injected on feedback charging tray can molded mixture, what often swell in meeting formation one on feedback charging tray can pile 13 by molded mixture, and when suppressing, this protuberance can pile the moulded product be pressed into by molded mixture, due to discontinuity, centre is comparatively closely knit, and surrounding is comparatively loose, makes the moulded product suppressed not meet standard, cause great waste, and the mode by shaking, make can molded mixture can be evenly distributed in feedback charging tray in 14, can will protuberance eliminate, improve pressing die goods time good article rate.
The quantity of described feedback charging tray is 2, be followed successively by transfer feedback charging tray and transfer feedback charging tray, weighing hopper first can be disposed in transfer feedback charging tray by molded mixture, now, described transfer feedback charging tray is positioned at described transfer and presents immediately below charging tray, transfer feedback charging tray can be transferred to its inside in transfer feedback charging tray by molded mixture, and transfer is presented charging tray and moved in mould, and its inside can be transferred in mould by molded mixture, prepare for compression forms moulded product.
The setting of two feedback charging trays, the speed to the material feeding of transfer feedback charging tray can be accelerated, transfer in mold process at described transfer feedback charging tray, its inside can be transferred in mold process and transfer feedback charging tray is back to immediately below transfer feedback charging tray in process by molded mixture by transfer feedback charging tray, described weighing hopper can be disposed in transfer feedback charging tray by molded mixture.When shifting feedback charging tray and being again transferred to the below of transfer feedback charging tray, filled in transfer feedback charging tray complete can molded mixture, now only need open the flashboard of the bottom of transfer feedback charging tray, and can be embodied as that transfer feedback charging tray fills can the object of molded mixture, accelerating that transfer feedback charging tray fills can the speed of molded mixture, save time, raise the efficiency.
Being injected in mould continuously by transfer feedback charging tray twice can molded mixture (one-period), described one-period can first time transfer feedback charging tray in molded mixture by its inside can molded mixture be transferred to mould after to present charging tray to second time transfer its inside before molded mixture is transferred to mould, can be put into net formula bamboo weaving in described mould.
The setting of net formula bamboo weaving, make in the moulded product of final compacting containing this net formula bamboo weaving, make the stability of the moulded product entirety obtained stronger, by can cohesive force between molded mixture and net formula bamboo weaving, the resistance to compression of the moulded product finally obtained and tensile resistance are significantly improved, simultaneously can also the generation of phenomenon of mode moulded product cracking.
Injecting in mould twice can molded mixture, and between this twice, put into net formula bamboo weaving, can ensure that net formula bamboo weaving in the moulded product finally obtained is in the inside of moulded product, ensures the attractive in appearance of moulded product.
It should be noted that at this, the laying method of described net formula bamboo weaving is artificial manual placement, or automatically placed by mechanical manipulator, described net formula bamboo weaving erects bamboo cane by many horizontal bamboo canes and Duo Gen and works out, parallel to each other between many described horizontal bamboo canes, the spacing between two described horizontal bamboo canes of arbitrary neighborhood is equal, parallel to each other between many described perpendicular paper slips, spacing between two described perpendicular bamboo canes of arbitrary neighborhood is equal, and the angle between described horizontal bamboo cane and described perpendicular bamboo cane is 90 °.
Be equipped with some horizontal strokes in described feedback charging tray, be longitudinally set with the vertical parting bead put, described feedback charging tray internal space is divided into several compartments by some described tabula bars and some described mediastinum bars, the setting in column in a row of compartment described in several, its concrete quantity can be 35-49.The setting of compartment (shape of compartment and compartment can be the same or different, according to actual needs set) can meet load Different Weight can have product requirement that is differently contoured and thickness to be molded as in product different piece by molded mixture.What each compartment was arranged to load Different Weight can molded mixture, reaches optimization moulded product, improves the utilization ratio of material, in addition, also helps lend some impetus to the large stretch ratio of compression molded step and can ensure the specification requirement of moulded product.
At this also it is emphasized that when shifting feedback charging tray and being positioned at immediately below transfer feedback charging tray, upper and lower some compartment one_to_one corresponding, in guarantee transfer feedback charging tray, compartment can just in time drop in compartment corresponding to below transfer feedback charging tray by molded mixture.
About compression molded step:
See Fig. 7 and Fig. 8, can be injected into after in mould 16 by molded mixture, because mould has heating (facilitating pressing die goods) function, its typical temperature is at 200 DEG C-230 DEG C, admittedly can the overlong time that stores in a mold of molded mixture, very likely can cause its structural damage because of heating for a long time by molded mixture, reduce the quality of moulded product, admittedly need relative decrease can the duration of molded mixture in mould, and twice must be injected in mould can molded mixture, first time inject can the time of molded mixture in mould the longest, admittedly need reduce that second time injects can time of molded mixture, and the setting of charging tray is presented by transfer, can accelerate to shift feedback charging tray obtains can the speed of molded mixture, thus relatively reduce can time of retaining in a mold of molded mixture.
Compression is described can molded mixture be that this press time is 60s-240s with the compacting of single compressed stroke.
The stretch ratio of described single compressed stroke is 1-10.
Pressure is 3Mpa-4Mpa.
Under the pressure between 3Mpa-4Mpa, compacting can molded mixture, compacting duration is 30s-60s, this process is single compressed stroke, Gu without the need to repeatedly opening and closing mould, in addition due to can the low water content of molded mixture, also non-ironingly excessive moisture be discharged to prevent the blast of mould.Because moulded product is subject to the process of high temperature and high pressure in pressing process, the insect alive of moulded product inside is all killed in this process, therefore without the need to heating or suffocating treatment the moulded product after compacting.
The preferred embodiment of concussion step and compression molded step is:
Can be sent in weighing hopper by molded mixture by discharge screw rod, weighing hopper continues to weigh, when reaching set(ting)value, stop transmission can molded mixture, open the gate under weighing hopper, in weighing hopper can molded mixture be injected into transfer feedback charging tray a compartment in, because the quantity of weighing hopper is equal with the line number of compartment, then these weighing hoppers setting in column, Gu often open the gate under a weighing hopper, and the compartment that can be row inject can molded mixture, inject complete, weighing hopper re-starts can the weighing of molded mixture, and the distance of a transfer feedback charging tray transverse shifting compartment, gate is obtained under again opening weighing hopper, continuing as that next column compartment injects can molded mixture, reciprocal with this, can molded mixture until all inject in all compartments in transfer feedback charging tray, now open the gate bottom transfer feedback charging tray, transfer feedback charging tray in can molded mixture fall into transfer feedback charging tray in, transfer feedback charging tray to move in mould (simultaneously, weighing hopper again for transfer feedback charging tray injects can molded mixture), and the gate opened bottom transfer feedback charging tray, make shift feedback charging tray in can fall in mould by molded mixture, then transfer feedback charging tray returns to the position to transfer feedback charging tray, in mould, put into net formula bamboo weaving simultaneously, transfer feedback charging tray second time is injected in transfer feedback charging tray can molded mixture, transfer feedback charging tray second time moves in mould, and inject in mould can molded mixture, mobile feedback charging tray is back to immediately below transfer feedback charging tray, mould carries out matched moulds and suppresses moulded product, circulate with this.
About moulded product pressing device:
Preferred implementation:
See Fig. 1, a kind of moulded product pressing device, comprise concussion blanking device 1 and heat pressing forming machines 2, described concussion blanking device comprises can the hopper of molded mixture for storing, weighing hopper 3 and filling place, described weighing hopper is arranged on the exit of described hopper, described filling place is arranged on immediately below described weighing hopper, described filling place is provided with moveable transfer feedback charging tray 5, described transfer feedback charging tray has two stations, wherein the first station is positioned on the filling place at place immediately below described weighing hopper, second station is positioned at the inlet place 6 of described heat pressing forming machines.
Preferably, be also provided with transfer between described filling place and described weighing hopper and present charging tray 4, and described transfer feedback charging tray is positioned at directly over described first station.
See Fig. 2 and Fig. 3, preferably, described transfer feedback charging tray and described transfer feedback charging tray all can be described as feedback charging tray, be equipped with some horizontal strokes in two described feedback charging trays, be longitudinally set with the vertical parting bead put, described feedback charging tray internal space is divided into several compartments 11 by some described tabula bars and some described mediastinum bars.
Further, compartment described in several can setting in column in a row, is positioned at the upper and lower one_to_one corresponding of some compartments that charging tray is presented in some compartments of the transfer feedback charging tray of the first station and described transfer.
The bottom of described hopper can also be provided with discharge screw rod, the quantity of described discharge screw rod, the quantity of described weighing hopper are all equal with the row of described compartment, row are arranged to before and after some described discharge screw rods, be set in parallel in same plane between some described discharge screw rods, the discharge gate place of each described discharge screw rod arranges a corresponding weighing hopper, and each described weighing hopper and described transfer are presented one of charging tray to arrange described compartment corresponding.
Described transfer feedback charging tray can be installed in orbit by roller, and in the frame of described track fixed installation earthquake blanking device, described track arranged transversely, described roller drives by stepper-motor or servomotor.
Carry out accurate mobile transfer feedback charging tray by stepper-motor or servomotor, guarantee transfer feedback charging tray all moves the distance of a compartment at every turn, ensures that accurately injection can molded mixture in transfer feedback charging tray.
See Fig. 4, further, four angles of two described feedback charging trays all can be provided with vibrator 12, and described vibrator is vertical direction vibrator.
Vibrator can produce the vibrations in horizontal and vertical direction, being to be dispersed in uniformly in compartment by molded mixture.
The bottom of two described feedback charging trays can all be provided with can the flashboard of molded mixture for discharging, and described flashboard is plugged on the bottom of described feedback charging tray.
Preferably, described transfer feedback charging tray moves preferably by crawler belt, and described crawler belt is arranged on the bottom of described transfer feedback charging tray.
Preferably, described heat pressing forming machines comprises the mold and bed die of working in coordination, and described bed die is heating mould.
The concrete operation of this moulded product pressing device is described in detail in " can molded mixture make the method for moulded product ", does not repeat them here.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (31)
1. one kind can molded mixture, comprise tackiness agent, short stream packing material and agricultural fibre, it is characterized in that: the weight of described tackiness agent account for described can the 3%-7% of molded mixture gross weight, described tackiness agent comprises vulcabond-ditane, and described agricultural fibre comprises bamboo fibers.
2. according to claim 1 can molded mixture, it is characterized in that: described agricultural fibre also comprises non-bamboo fibers, described non-bamboo fibers adopts any one or a few composition material following to form, and described material comprises rice straw, rape stalk, cotton stalk and wheat stalk.
3. according to claim 2 can molded mixture, it is characterized in that: the weight ratio of described bamboo fibers and described non-bamboo fibers is 0.6-4.
4. according to any one of claim 1-3 can molded mixture, it is characterized in that: described short stream packing material is wheat-flour, the weight of described short stream packing material account for described can the 8%-10% of gross weight of molded mixture.
5. according to claim 4 can molded mixture, it is characterized in that: the major ingredient of described tackiness agent is Examples of soy adhesives.
6. adopt and can make the method for moulded product by molded mixture described in claim 1-5, it is characterized in that: comprise the following steps:
A. agricultural fibre, tackiness agent and short stream packing material is prepared;
B. described agricultural fibre, described tackiness agent and described short stream packing material being mixed to form can molded mixture, and described tackiness agent and described short stream packing material spray in agricultural fibre by wherein said being mixed under the pressure of 0.5Mpa-0.8Mpa;
C. concussion is described can molded mixture;
D. compression is described can form moulded product by molded mixture.
7. the method for making moulded product according to claim 6, it is characterized in that: in step c, this concussion for can be disposed in weighing hopper by molded mixture by discharge screw rod by described, and can be disposed to load weighted in feedback charging tray by molded mixture by this weighing hopper.
8. the method for making moulded product according to claim 7, is characterized in that: described feedback charging tray consists of the compartment of some settings in column in a row.
9. the method for making moulded product according to claim 8, it is characterized in that: described feedback charging tray comprises transfer feedback charging tray and transfer feedback charging tray, weighing hopper first can be disposed in transfer feedback charging tray by molded mixture, now, described transfer feedback charging tray is positioned at immediately below described transfer feedback charging tray, transfer feedback charging tray by its inside can molded mixture be transferred to transfer feedback charging tray in, transfer feedback charging tray moves in mould, and its inside can be transferred in mould by molded mixture, prepare for compression forms moulded product.
10. the method for making moulded product according to claim 9, is characterized in that: transfer feedback charging tray can after molded mixture be transferred to mould by its inside, and described transfer feedback charging tray returns to described transfer and presents immediately below charging tray.
The method of 11. making moulded products according to claim 10, it is characterized in that: transfer in mold process at described transfer feedback charging tray, its inside can be transferred in mold process and transfer feedback charging tray is back to immediately below transfer feedback charging tray in process by molded mixture by transfer feedback charging tray, described weighing hopper can be disposed in transfer feedback charging tray by molded mixture.
The method of 12. making moulded products according to claim 9,10 or 11, it is characterized in that: that can hold one-period in described mould can molded mixture, described one-period can molded mixture be double can be disposed to its inside in described mould by molded mixture of described transfer feedback charging tray.
The method of 13. making moulded products according to claim 12, it is characterized in that: described one-period can first time transfer feedback charging tray in molded mixture by its inside can molded mixture be transferred to mould after to present charging tray to second time transfer its inside before molded mixture is transferred to mould, can be put into net formula bamboo weaving in described mould.
14. the method for making moulded product according to claim 13, is characterized in that: the laying method of described net formula bamboo weaving is artificial manual placement, or is automatically placed by mechanical manipulator.
The method of 15. making moulded products according to claim 13, is characterized in that: described net formula bamboo weaving erects bamboo cane by many horizontal bamboo canes and Duo Gen and works out.
The method of 16. making moulded products according to claim 15, it is characterized in that: parallel to each other between many described horizontal bamboo canes, spacing between two described horizontal bamboo canes of arbitrary neighborhood is equal, parallel to each other between many described perpendicular paper slips, spacing between two described perpendicular bamboo canes of arbitrary neighborhood is equal, and the angle between described horizontal bamboo cane and described perpendicular bamboo cane is 90 °.
The method of 17. making moulded products according to claim 16, is characterized in that: the spacing between adjacent two described horizontal bamboo canes is equal with the spacing between adjacent two described perpendicular bamboo canes.
The method of 18. making moulded products according to claim 6, is characterized in that: compression is described can molded mixture be that this press time is 60s-240s with the compacting of single compressed stroke.
The method of 19. making moulded products according to claim 18, is characterized in that: the stretch ratio of described single compressed stroke is 1-10.
The method of 20. making moulded products according to claim 6, is characterized in that: in steps d, and simultaneously for this process heats, described Heating temperature is 200 DEG C-230 DEG C.
The method of 21. making moulded products according to claim 6, is characterized in that: in steps d, its pressure is 3Mpa-4Mpa.
22. 1 kinds of moulded product pressing devices realizing claim 6-21 method, comprise concussion blanking device and heat pressing forming machines, described concussion blanking device comprises can the hopper of molded mixture for storing, weighing hopper and filling place, it is characterized in that: described weighing hopper is arranged on the exit of described hopper, described filling place is arranged on immediately below described weighing hopper, described filling place is provided with moveable transfer feedback charging tray, described transfer feedback charging tray is provided with the first station and the second station, wherein the first station is positioned on the filling place at place immediately below described weighing hopper, second station is positioned at the inlet place of described heat pressing forming machines.
23. moulded product pressing device according to claim 22, is characterized in that: be also provided with transfer between described filling place and described weighing hopper and present charging tray, and described transfer feedback charging tray is positioned at directly over described first station.
24. moulded product pressing devices according to claim 23, it is characterized in that: described transfer feedback charging tray and described transfer feedback charging tray are all called feedback charging tray, be equipped with some horizontal strokes in two described feedback charging trays, be longitudinally set with the vertical parting bead put, described feedback charging tray internal space is divided into several compartments by some described tabula bars and some described mediastinum bars.
25. moulded product pressing devices according to claim 24, is characterized in that: the setting in column in a row of compartment described in several, are positioned at the upper and lower one_to_one corresponding of some compartments that charging tray is presented in transfer feedback some compartments of charging tray of the first station and described transfer.
26. moulded product pressing devices according to claim 25, it is characterized in that: the bottom of described hopper is also provided with discharge screw rod, the quantity of described discharge screw rod, the quantity of described weighing hopper are all equal with the row of described compartment, row are arranged to before and after some described discharge screw rods, be set in parallel in same plane between some described discharge screw rods, the discharge gate place of each described discharge screw rod arranges a corresponding weighing hopper, and each described weighing hopper and described transfer are presented one of charging tray to arrange described compartment corresponding.
27. moulded product pressing devices according to claim 26, it is characterized in that: described transfer feedback charging tray is installed in orbit by roller, in the frame of described track fixed installation earthquake blanking device, described track arranged transversely, described roller is driven by stepper-motor or servomotor.
28. moulded product pressing devices according to claim 24, is characterized in that: four angles of two described feedback charging trays are all provided with vibrator, and described vibrator is vertical direction vibrator.
29. moulded product pressing devices according to claim 24, is characterized in that: the bottom of two described feedback charging trays is all provided with can the flashboard of molded mixture for discharging, and described flashboard is plugged on the bottom of described feedback charging tray.
30. the moulded product pressing device according to any one of claim 22-29, is characterized in that: described transfer feedback charging tray is moved by crawler belt, described crawler belt is arranged on the bottom of described transfer feedback charging tray.
31. moulded product pressing devices according to claim 30, is characterized in that: described heat pressing forming machines comprises the mold and bed die of working in coordination, and described bed die is heating mould.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397503.7A CN104262979A (en) | 2014-08-14 | 2014-08-14 | Pressing equipment adopted in method for making molded part and raw material mixture thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410397503.7A CN104262979A (en) | 2014-08-14 | 2014-08-14 | Pressing equipment adopted in method for making molded part and raw material mixture thereof |
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| CN104262979A true CN104262979A (en) | 2015-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171889A (en) * | 2015-05-22 | 2015-12-23 | 中国装饰股份有限公司 | Pressing device for floors |
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| US20050258561A1 (en) * | 2001-05-04 | 2005-11-24 | Fibertech, Inc. | Fire-resistant material and method of manufacture |
| US20050250900A1 (en) * | 2002-05-29 | 2005-11-10 | Stofko John I | Adhesive compositions for bonding lignocellulosic materials, bonding methods and apparatus, and bonded articles |
| CN1486841A (en) * | 2003-08-18 | 2004-04-07 | 杜鸣川 | Molded composite board of regenerated polymer as basic material and bamboo strip as reinforcing material |
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Application publication date: 20150107 |