CN101417489B - Helmet manufacture method and products thereof - Google Patents
Helmet manufacture method and products thereof Download PDFInfo
- Publication number
- CN101417489B CN101417489B CN200810162452.4A CN200810162452A CN101417489B CN 101417489 B CN101417489 B CN 101417489B CN 200810162452 A CN200810162452 A CN 200810162452A CN 101417489 B CN101417489 B CN 101417489B
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- machine barrel
- plastics
- helmet
- plastic
- liquation
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 130
- 229920003023 plastic Polymers 0.000 claims abstract description 130
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000000047 product Substances 0.000 claims description 25
- 238000000465 moulding Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000006052 feed supplement Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 41
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 34
- 230000007246 mechanism Effects 0.000 description 20
- 239000004604 Blowing Agent Substances 0.000 description 16
- 238000005187 foaming Methods 0.000 description 14
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 10
- 239000011261 inert gas Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 5
- 235000019399 azodicarbonamide Nutrition 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 3
- 239000004156 Azodicarbonamide Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004500 asepsis Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 208000020442 loss of weight Diseases 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 208000016261 weight loss Diseases 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- UJTTUOLQLCQZEA-UHFFFAOYSA-N 9h-fluoren-9-ylmethyl n-(4-hydroxybutyl)carbamate Chemical compound C1=CC=C2C(COC(=O)NCCCCO)C3=CC=CC=C3C2=C1 UJTTUOLQLCQZEA-UHFFFAOYSA-N 0.000 description 1
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009183 running Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- DUIOPKIIICUYRZ-UHFFFAOYSA-N semicarbazide Chemical compound NNC(N)=O DUIOPKIIICUYRZ-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000035922 thirst Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
- A42C2/00—Manufacturing helmets by processes not otherwise provided for
- A42C2/002—In-mould forming
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
The invention relates to a manufacturing method of a helmet, comprising the following steps: manufacturing an injection mold of a plastic helmet; manufacturing mixed foamed plastic liquid, leading the liquid into a first storage machine barrel, extruding the liquid out of the first storage machine barrel, then leading the liquid into an injection machine barrel by a first check valve, simultaneously feeding materials into the first storage machine barrel by a feeding machine barrel, pressurizing the injection machine barrel, carrying injection until the mold is molded, firstly cooling the surface of the plastic liquid, measuring the current amount of injection of the injection machine barrel and the current output speed of the feeding machine barrel, adjusting the output speed of the feeding machine barrel, adjusting the rotating speed of a screw of the feeding machine barrel so as to control the feeding speed of the plastics and simultaneously adjusting the admission speed so as to match the feeding speed of the plastics. The product obtained according to the method comprises a lining which is coated by an outer layer; the helmet product obtained according to the method comprises the outer layer which does not contain bubbles or contains few bubbles and an inner core containing bubbles; and the inner core is coated by the outer layer.
Description
Technical field
The present invention relates to manufacture method of a kind of plastic helmet and products thereof.
Background technology
The known helmet, as safety cap, Work cap, miners' cap ... make in injection moulding mode in large multiplex pure plastics, the plastics that this mode consumes are more, and along with oil spike, people thirst for saving raw material.In addition, the impact resistance of pure plastic products is poor, shock absorption is not good, and the outer liner that can be hit easy cracking, the helmet by object of the helmet can not be alleviated again impact, cannot play well the effect of protection personal safety.
And the shell of the helmet and liner need to be manufactured respectively, recombinant assembling, complex process.
Adopting foamed plastic to manufacture the helmet neither affects the use of the helmet, can obviously save again raw material, and foamed plastic shock resistance is good, can make helmet firm and durable, weight reduction.But known foamed plastic technology is not suitable for the manufacture helmet.
Known foaming technique is to use physical blowing agent or CBA and molten plastic to obtain the method for foaming.Wherein, chemical blowing is for adopting decomposability CBA to mix manufacture with molten plastic, and this type of blowing agent is generally pressed powder, and in the time heating the decomposing body of giving vent to anger, and make plastic foamed, and weight reduction.This type of CBA mostly is organic azo-compound, as azobisformamide (ABFA) (Azodicarbonamide), the two isobutyls fine (Azobisisobutyro-nitrile is called for short AIBN) of azo.For example: Azodicarbonamide blowing agent is subject in thermal process in manufacture, can produce possibility carcinogen " semicarbazide hydrochloride semicarbazide (SEM) "; Therefore have many countries to forbid selling or import using Azodicarbonamide blowing agent as with material and the product of Food Contact.Thereby the foamed plastic that this type of CBA and molten plastic are mixed, have toxic residue and exist in foamed plastic, and cause human body to contact dangerous situation, and this residual poisonous substance has not environmental protection and pollutes secret worry in the time that this CBA of class decomposes.
Aforementioned physical blowing agent can be lower boiling organic compound, as butane, pentane, benzinum, dichlorodifluoromethane etc.; But this blowing agent has inflammability and poisonous substance danger, and has potential air pollution problems inherent, thereby this kind of blowing agent utilization is restricted.
In addition for improving aforementioned disappearance, and have the proposition using avirulent gaseous state inert gas as physical blowing agent, and the inert gas of this gaseous state is only by adding molten plastic mode to be difficult for mixing with molten plastic is stable, and the generation inhomogeneous product that foams.Thereby the mode using aforementioned gaseous state inert gas as physical blowing agent is not feasible, known expanded material cannot obtain with the foaming technique of this kind of gaseous state inert gas the expanded plastic material of uniform in foaming.
For the inert gas that improves gaseous state is difficult for obtaining the uniform foamed products of quality as physical blowing agent, there is the foaming method of many propositions using the inert gas of Supercritical Conditions as physical blowing agent, to cause manufacturing cost to increase situation but produce overcritical inert gas by setting pressure, temperature, and for this foamed products has uniform pore and good appearance and without collapse, often need extra use additive, or CBA.
So, while using to shot foamed moulding because of aforesaid simple physical blowing agent, still exist many technical problems unresolved, so using to shot foamed moulding, CBA still has to be continued adopt.
In addition, because known expanded material has uniform pore and good appearance without collapse for this foamed products, often need the extra additive that uses, make more or less to be permitted in plastic product extra additive, and make effectively recycling of plastic product.
Outside the helmet, shell, liner etc. are normal adopts plastic material moulding to manufacture to reduce production costs, but manyly adopts plastics completely or add a little additive moulding, causes the heavier situation of the higher finished product of materials cost.
The good characteristic having in order to obtain expanded material, with the flat appearance of product, and in order to make foamed products there is good appearance without collapse, the foaming method of aforementioned physical blowing agent, often needs additionally to use additive, or CBA.This kind of situation, when human body is contacted with foamed products, still has safe secret worry.
In addition, if only using simple physical blowing agent, expanded material without additionally using additive to obtain foaming, also contributes to the needs of environmental protection.
Edge is to have a kind of demand, only uses simple physical blowing agent and without additional additive, makes the expanded plastic material that obtains, containing extra additive, to avoid producing residual safe secret worry because of additive, with the problem of avoiding causing environmental pollution; Thereby, can make full use of the advantage of foamed plastic, promote helmet product practical effect.
Summary of the invention
The present invention will solve the above-mentioned shortcoming of prior art, and a kind of asepsis environment-protecting, uniform in foaming, apparent good, the good impact resistance of shell, plastic helmet manufacture method that buffering damping capaicty is strong, moulding process convenient, cost is low of liner and products thereof are provided.
The manufacture method of the helmet of the present invention, comprises the steps:
(1) injection mold of making plastic helmet;
(2) injected plastic, gas, to reinforced machine barrel, stir by heating and screw rod, make aforementioned plastics melting and are mixed to form with aforementioned gas the foamed plastic liquation mixing;
(3) the foamed plastic liquation of aforementioned mixing is imported to the first storing machine barrel;
(4) the plastic melting hydraulic pressure that is applicable to the capacity once penetrating is gone out to the first described storing machine barrel, simultaneously to carrying out pressure control and compensation in the first described storing machine barrel cavity volume, the first storing machine barrel cavity volume internal pressure described in keeping is stable;
(5) by the first check valve, the plastics liquation that is forced out the first described storing machine barrel is imported and penetrates machine barrel;
(6) to penetrating machine barrel pressurization, penetrate to described mould molding, make the surface of plastics liquation first cooling;
(7) measure the current output speed when time ejaculation amount, reinforced machine barrel that penetrates machine barrel;
(8) according to time ejaculation amount of working as that penetrates machine barrel, adjust the output speed of reinforced machine barrel, make it to equate with time ejaculation amount of working as that penetrates machine barrel: adjust the rotating speed of screw rod on reinforced machine barrel to control the speed that adds of plastics, adjust intake velocity to coordinate plastics to add speed, to ensure the uniformity of gas in plastics simultaneously.
Further, described step (5) is divided into 2 steps and carries out:
(5.1) by the first check valve, the plastics liquation that is forced out the first described storing machine barrel is imported to the second storing machine barrel;
(5.2) by the second check valve, the plastics liquation that is forced out the second described storing machine barrel is imported and penetrates machine barrel, to being forced out the plastics liquation gas injection for the second time of the second described storing machine barrel, and stir, then be pressed into described ejaculation machine barrel; Meanwhile, the screw rod in described reinforced machine barrel continues to rotate, and described reinforced machine barrel is to the first described storing machine barrel feed supplement.
Further again, in step (6), control the cooling of plastics liquations, make the cooling velocity of shell one side of the helmet faster than liner one side.
The helmet product obtaining according to the manufacture method of the helmet described in the inventive method, is characterized in that: comprise bubbles not or containing the skin of a small amount of bubble, the inner core of bubbles, described inner core coated by described skin.
Further, in described skin, the thickness of the shell one side of the helmet is greater than liner one side.
The present invention is in ejection formation operation, utilize the feature of the solubility temperature influence of bubble in plastics liquation, carry out cooling to the liquation treating the exterior first and then interior in mould, outer field bubble is driven into liner, not bubbles or containing a small amount of bubble of skin, apparent well-pressed, firm wear-resisting, good waterproof performance, the liner of bubbles provides the advantage such as shock-absorbing, loss of weight.
The present invention can make shell and the liner one-shot forming of the helmet, and convenient and swift, quality is good.
The uniformity of the bubble in foamed plastic is relevant with gas content, and air content is lower, is more not easy to reach bubble and is uniformly distributed.But too fast to gas injection in plastics liquation, can not make bubble incorporate plastics liquation, cause gas to separate with plastics.The present invention adopts 2 insufflations to gas injection in plastics liquation, can be in the situation that ensureing that bubble evenly incorporates plastics liquation, improve gas content in plastics liquation, thereby produce bubble exquisiteness, uniform plastic helmet, thin intensity, the impact resistance that evenly contributes to improve the helmet of bubble.
The helmet of tool physical blowing plastic material of the present invention, tool plastics, gaseous state gas, its gaseous state gas can be gaseous air or pure gaseous state inert gas, and this inert gas can be nitrogen, carbon dioxide, ... etc., and this gaseous state gas and plastics are mixed to form expanded plastic material, and this expanded plastic material tool skin, internal layer, and this internal layer is coated by skin, and skin is plastics, internal layer is plastic overmold bubble, make this expanded plastic material can reduce quantity of plastics, and can promote thermal insulation by the bubble of internal layer, and can have light weight effect, this expanded plastic material does not need additionally to use additive or CBA again, can guarantee noresidue noxious material, harmful to human can avoid human body contact time, and recyclable recycling, can have environmental protection effect.
The plastics of the shell of the helmet of the present invention can be PC polycarbonate, PP polypropylene, ABS, and the foaming ratio gaseous state gas of this expanded plastic material is plastics 20%～40%, the plastics of the liner of the helmet can be TPU, and the foaming ratio gaseous state gas of this expanded plastic material is plastics 300%～700%; The impact resistance of shell that make the helmet can have light weight concurrently, to reduce quantity of plastics, the helmet is strong and the liner of the helmet has stronger buffering damping capaicty.
Advantage of the present invention is: asepsis environment-protecting, uniform in foaming, technique be convenient, apparent good, cost is low.
Brief description of the drawings
Fig. 1 is the profile of the helmet of manufacturing of the present invention
Fig. 2 is the schematic diagram of the equipment that uses of the inventive method
Fig. 3 is the schematic diagram that penetrates the employing electric pushing device of machine barrel
Fig. 4 is the schematic diagram of the employing electric pushing device of storing machine barrel
Fig. 5 is the hydraulic motor of rotary actuation power source that can screw rod
Fig. 6 is the force diagram of screw rod and plastic grain
Fig. 7 is the cross-sectional view of material pipe body of the present invention
Fig. 8 is that the present invention adopts spiral fluted body schematic diagram
Detailed description of the invention
With reference to accompanying drawing 1-8:
The manufacture method of plastic helmet of the present invention, comprises the steps:
1. the injection mold of making plastic helmet, described mould has the monnolithic case of the described helmet;
2. injected plastic, gas, to reinforced machine barrel 1, stir by heating and screw rod 12, make aforementioned plastics melting and are mixed to form with aforementioned gas the foamed plastic liquation mixing;
3. the foamed plastic liquation of aforementioned mixing is imported to the first storing machine barrel 2;
4. the plastic melting hydraulic pressure that is applicable to the capacity once penetrating is gone out to the first described storing machine barrel 2, simultaneously to carrying out pressure control and compensation in the first described storing machine barrel 2 cavity volumes, the first storing machine barrel 2 cavity volume internal pressures described in keeping are stable;
5. by the first check valve 5, the plastics liquation that is forced out the first described storing machine barrel 2 is imported to the second storing machine barrel 31;
6. by the second check valve 32, the plastics liquation that is forced out the second described storing machine barrel 31 is imported and penetrates machine barrel 4, to being forced out the plastics liquation gas injection for the second time of the second described storing machine barrel 31, and stir, then be pressed into described ejaculation machine barrel 4; Meanwhile, the screw rod 12 in described reinforced machine barrel 1 continues to rotate, and described reinforced machine barrel 1 is to the first described storing machine barrel 2 feed supplements;
7. pair penetrate machine barrel 4 and pressurize, penetrate to described mould molding, make the surface of plastics liquation first cooling, make the cooling velocity of shell one side of the helmet faster than liner one side;
8. measure the current output speed when time ejaculation amount, reinforced machine barrel 1 that penetrates machine barrel 4;
9. according to time ejaculation amount of working as that penetrates machine barrel 4, adjust the output speed of reinforced machine barrel 1, make it to equate with time ejaculation amount of working as that penetrates machine barrel 4: adjust the rotating speed of screw rod 12 on reinforced machine barrel 1 to control the speed that adds of plastics, adjust intake velocity to coordinate plastics to add speed, to ensure the uniformity of gas in plastics simultaneously.
The product obtaining according to the manufacture method of plastic helmet of the present invention, comprises bubbles not or containing the skin 101 of a small amount of bubble, the liner 102 of bubbles, the two sides of described liner 102 is coated by described skin 101.
Be greater than the skin 1012 of the one side of liner as the thickness of shell 1011 of the face of use.
The plastics of the shell of the helmet of the present invention can be PC polycarbonate, PP polypropylene, ABS, and the foaming ratio gaseous state gas of this expanded plastic material is plastics 20%～40%, the plastics of the liner of the helmet can be TPU, and the foaming ratio gaseous state gas of this expanded plastic material is plastics 300%～700%; The impact resistance of shell that make the helmet can have light weight concurrently, to reduce quantity of plastics, the helmet is strong and the liner of the helmet has stronger buffering damping capaicty; And make product surface smooth because gas itself expands, surface irregularity situation can avoid penetrating pressurize time, and reduce internal stress, can reduce again product in transporting or using because variations in temperature produces deformation.
The helmet of pure physical blowing plastic material of the present invention, this expanded plastic material must not adopt CBA completely, can guarantee non-residual toxicity material, can avoid human body when contact harmful to human, and recyclable recycling, can have environmental protection effect.
Finished product of the present invention is because of the gaseous state gas of tool preset proportion, thereby can lower helmet weight, aforementioned example is as an illustration, not this creation restriction, this creation can adopt other plastics or other foaming ratio on demand, and this creation can change and revise in this creates similar scope.
Implement the special equipment plastic foam injection forming device of the inventive method, comprise one for injected plastic, gas to form the reinforced machine barrel 1 of bubbles plastics liquation, on reinforced machine barrel 1, be connected with the first air delivery device 11, hopper, heater, the inner chamber of reinforced machine barrel 1 is equipped with screw rod 12, and screw rod 12 connects rotary drive mechanism;
The front end of described reinforced machine barrel 1 inner chamber is communicated with the inner chamber of the first storing machine barrel 2, and the first described storing machine barrel 2 also has first to extrude mechanism, the first cubic content measurement mechanism 21;
The front end of the cavity volume of the first described storing machine barrel 1 is communicated with and is penetrated machine barrel 4 by the first check-valves 5, making-up air device 3;
Described making-up air device 3 comprises: the second storing machine barrel 31, has the material inlet 312, the second extrusion mechanism, the second cubic content measurement mechanism 311 that are communicated with parent body in the second described storing machine barrel 31; The front end of the cavity volume of the second described storing machine barrel 31 is communicated with Lower Establishment by the second check-valves 32, after the second described check-valves 32, is connected with the second air delivery device 33;
Described ejaculation machine barrel 4 is also equipped with and the 3rd cubic content measurement mechanism 41, penetrates machine barrel front end nozzle is housed;
The ejecting mechanism of described ejaculation machine barrel 4 and the 3rd cubic content measurement mechanism 41, first of the first storing machine barrel 2 extrudes mechanism and the first cubic content measurement mechanism 21, the rotary drive mechanism of the screw rod 12 of reinforced machine barrel 1 is all connected in a central controller, said central controller relatively penetrates the corresponding output quantity of rotating speed when time ejaculation amount and screw rod 12 of machine barrel 4, in both unequal situations, send and adjust the rotary drive mechanism of command signal to screw rod 12 on reinforced machine barrel 1, to control the speed that adds of plastics, the output speed that makes reinforced machine barrel 1 with penetrate machine barrel 4 when time ejaculation amount suitable.
Or the stroke of the piston rod 23 of adjusting storing machine barrel 2 is to regulate the next inlet amount of storing machine barrel 2.
The control end of the admission gear of the first described air delivery device 11 is connected in described central controller, and described central controller is adjusted the intake velocity of described admission gear according to plastics addition.
After the second described check-valves, after the second air delivery device 33 of 32, be provided with agitating device 34.
The second described air delivery device 33 can adopt liquid nitrogen high-pressure vaporization gas injection device as shown in Figure 8.Use liquid nitrogen high-pressure vaporization gas filling device to foamed plastic solution kind steam injection, can accurate measurement gas flow, the accurately gas flow of control injection.
In the first described storing machine barrel 2, the pressure-detecting device for detection of cavity volume internal pressure is also housed, described pressure-detecting device connects described central controller, and described central controller receives the signal of pressure-detecting device and adjusts the pressure of the first extrusion mechanism according to signal.
The front end of described charger tube inner chamber is communicated with the inner chamber of the first storing machine barrel by the 3rd check-valves.
First of described storing machine barrel 2 extrudes mechanism and has following structure: one first annular supporting base 22 is housed in the cavity volume of the first storing machine barrel 2, first piston bar 23 is slidably mounted in the first supporting base 22, first piston bar 23 and the first supporting base 22 are sealed and matched, gapped between first piston bar 23 and chamber wall; First piston bar 23 rear portions coordinate with the first thrust part.
The ejecting mechanism of described ejaculation machine barrel has following structure: in the ejaculation cavity volume of ejaculation machine barrel, the second ring-shaped bearing seat 42 is housed, the second piston rod 43 is slidably mounted in the second supporting base 42, the second piston rod 43 and the second supporting base 42 are sealed and matched, gapped between the second piston rod 43 and ejaculation chamber wall; The second piston rod 43 rear portions coordinate with the second thrust part.
The material inlet of the cavity volume of described storing machine barrel 2 is near the first described supporting base 22; The material inlet of the cavity volume of described ejaculation machine barrel is near the second described supporting base 42.
Described the first thrust part, the second thrust part can be the oil cylinder 44 shown in Fig. 1, can be also the form of the electric pushing device 7 of the driven by servomotor screw mandrel shown in Fig. 3,4.Electric pushing device in Fig. 3,4 comprises pedestal 71, screw mandrel 72 is located on pedestal 71, also comprise intermeshing screw mandrel 72 and nut 73, screw mandrel 72 front ends are pushing end, on pedestal 71, connect an external rotor permanent magnet formula servomotor 74, described nut 73 is fixed on the rotor 741 of external rotor permanent magnet formula servomotor 74; Screw mandrel 72 front portions are provided with restriction screw mandrel 72 and rotate but allow the locating part of screw mandrel translation.Adopt the way of propelling of the driven by servomotor screw mandrel shown in Fig. 3,4 can improve the precision of thrust control, thereby improve the pressure controlled precision in machine barrel.
The power source of described rotary drive mechanism is servomotor.
The present invention, by setting up storing machine barrel 2 as middle transition station, has taken into account the contradiction that the batch (-type) charging of jet forming method and the continous way of foamed plastic generate, and has realized the method for radiation of foamed plastic and has produced.Expand the range of application of foamed plastic, can save plastics, promoted environmental protection, reduced the cost of plastic products.
Meanwhile, the present invention penetrates the plastics liquation of machine barrel 4 and carries out secondary gas injection transferring to, and in the situation that guaranteeing gas uniform and dissolving in plastics liquation, has promoted the ratio of gas and plastics, can manufacture the frothing injection part of high loss of weight ratio.
The machine barrel of quantitative ejaculation (extrusion) mechanism on existing injection machine is all in the form of piston.The front end of injection material pipe has nozzle, and piston rear portion connects a hydraulic cylinder.Plunger shaft, in the time of charging, relies on the pressure of liquid material that piston is retreated, to increase the volume of plunger shaft.The mobile easily wearing and tearing cavity volume inwall repeatedly of piston, plunger shaft relies on piston and chamber wall to seal on the other hand, must there is accurate dimensional fits between the two, processing request is very high, thus, machine barrel and piston use the not long time just to need overhaul, correct the fit dimension of piston and machine tube inner wall, and use cost increases.Finally, piston need to seal with machine tube inner wall, also causes injection speed slow, and piston can only advance by low speed in machine barrel, otherwise can scratch machine tube inner wall.
There is not friction, do not need sealing in piston rod and the chamber wall of quantitative ejaculation of the present invention (extrusion) mechanism, reduce on the one hand the requirement of chamber wall machining accuracy, the wearing and tearing of chamber wall are eliminated on the other hand, extend the service life of machine barrel, can also exempt overhaul frequently, reduce maintenance cost, enhance productivity.Finally, the present invention can also ensure that chamber wall is not worn in the time improving injection speed.
When quantitative ejaculation (extrusion) mechanism on injection machine adopts piston type machine barrel, in the time of injection, feed liquid is not penetrated completely, federation's residual material on piston end surface, and that the charging of plunger shaft is front end is pouring-in, therefore, near piston end surface, form material dead angle, material herein is always stayed on piston end surface, causes thus the material carbonization of material end face.
The enter material way of the cavity volume of quantitative ejaculation (extrusion) mechanism of the present embodiment is doggy style, has ensured not exist material dead angle, can effectively prevent material carbonization
Pressure during due to secondary gas injection is very high, if left, its reverse conduction is to screw rod 12, easily cause screw rod 12 to turn motionless, therefore the present invention is provided with making-up air device, the second air delivery device 33 is arranged on after the second non-return valve 32 of 3 belows, tonifying Qi unit, and is provided with the first non-return valve 5 between making-up air device and the first storing machine barrel 2.When tonifying Qi unit 3 is when penetrating machine barrel 4 convey materials, the high pressure of the second air delivery device 33 is introduced into runner, although now the second non-return valve 32 has been opened, the high pressure of secondary gas transmission is transmitted to making-up air device, but because the first non-return valve 5 is now closed, high pressure can not be transmitted to screw rod 12, and the interference of the pressure that can effectively avoid secondary gas injection to screw rod 12, guarantees screw rod 12 continuous runnings.
Described material pipe internal chamber wall on have before and after extend wire casing 13.
Described wire casing 13 is opened in the paragraph before described material tube cavity wall melts corresponding to plastic grain.
Described wire casing 13 is straight-line grooves, or helicla flute, or oblique trunking.
The wire casing 13 of the present embodiment has good effect for promoting usefulness of the present invention: in the time that screw rod 12 rotates, the plastic grain in tube cavity wall is blocked by wire casing 13, can not rotate with screw rod 12, has increased the frictional resistance of plastics and tube wall.Be conducive to increase the active force between threaded portion and the plastic grain of screw rod 12, thereby promptly plastics material promoted forward, increase work efficiency.Meanwhile, the jacking force being subject to while moving back bar due to screw rod 12 increases, and is able to the packing pressure larger in screw rod tail setting, can improve the force value of the plastics liquation of material pipe front end, the quality of improving product.
And the present invention also can manufacture by gaseous state gas the physical blowing plastic helmet as blowing agent by other facility certainly.
Content described in this description embodiment is only enumerating of way of realization to inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention is also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (4)
1. the manufacture method of the helmet, comprises the steps:
(1) injection mold of making plastic helmet;
(2) injected plastic, gas, to reinforced machine barrel, stir by heating and screw rod, make aforementioned plastics melting and are mixed to form with aforementioned gas the foamed plastic liquation mixing;
(3) the foamed plastic liquation of aforementioned mixing is imported to the first storing machine barrel;
(4) the plastic melting hydraulic pressure that is applicable to the capacity once penetrating is gone out to the first described storing machine barrel, simultaneously to carrying out pressure control and compensation in the first described storing machine barrel cavity volume, the first storing machine barrel cavity volume internal pressure described in keeping is stable;
(5) by the first check valve, the plastics liquation that is forced out the first described storing machine barrel is imported and penetrates machine barrel;
(5.1) by the first check valve, the plastics liquation that is forced out the first described storing machine barrel is imported to the second storing machine barrel;
(5.2) by the second check valve, the plastics liquation that is forced out the second described storing machine barrel is imported and penetrates machine barrel, to being forced out the plastics liquation gas injection for the second time of the second described storing machine barrel, and stir, then be pressed into described ejaculation machine barrel; Meanwhile, the screw rod in described reinforced machine barrel continues to rotate, and described reinforced machine barrel is to the first described storing machine barrel feed supplement;
(6) to penetrating machine barrel pressurization, penetrate to described mould molding, make the surface of plastics liquation first cooling;
(7) measure the current output speed when time ejaculation amount, reinforced machine barrel that penetrates machine barrel;
(8) according to time ejaculation amount of working as that penetrates machine barrel, adjust the output speed of reinforced machine barrel, make it to equate with time ejaculation amount of working as that penetrates machine barrel: adjust the rotating speed of screw rod on reinforced machine barrel to control the speed that adds of plastics, adjust intake velocity to coordinate plastics to add speed, to ensure the uniformity of gas in plastics simultaneously.
2. the manufacture method of the helmet as claimed in claim 1, is characterized in that: in step (6), control the cooling of plastics liquations, make the cooling velocity of shell one side of the helmet faster than liner one side.
3. the helmet product obtaining according to the manufacture method of the helmet one of claim 1-2 Suo Shu, is characterized in that: comprise bubbles not or containing the skin of a small amount of bubble, the inner core of bubbles, described inner core coated by described skin.
4. helmet product as claimed in claim 3, is characterized in that: in described skin, the thickness of the shell one side of the helmet is greater than liner one side.
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| CN200810162452.4A CN101417489B (en) | 2008-11-14 | 2008-11-14 | Helmet manufacture method and products thereof |
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| CN200810162452.4A CN101417489B (en) | 2008-11-14 | 2008-11-14 | Helmet manufacture method and products thereof |
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| CN101417489B true CN101417489B (en) | 2014-07-30 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012159126A1 (en) * | 2011-05-13 | 2012-11-22 | Dorasamy Ramchander | Moulding method |
| CN103121257B (en) * | 2011-11-18 | 2015-12-09 | 张金萍 | A kind of manufacture method of ear washing bulb |
| ES2415739B1 (en) * | 2012-01-24 | 2014-11-25 | Mat Global Solutions, S.L. | PROCEDURE AND APPLIANCE FOR THE MANUFACTURE OF A COMPOSITE MATERIAL BODY PROVIDED WITH AN INTERIOR CAVITY WITH AN OPENING TO THE OUTSIDE |
| CN104784918B (en) * | 2015-03-18 | 2017-03-01 | 桐乡波力科技复材用品有限公司 | Hockey player's helmet and preparation method thereof |
| CN106084621A (en) * | 2016-06-04 | 2016-11-09 | 江阴市达菲玛汽配科技有限公司 | Graphene helmet preparation technology |
| CN111248575A (en) * | 2020-04-15 | 2020-06-09 | 湖南翰坤实业有限公司 | Anti-collision safety helmet and forming method thereof |
| CN111580481B (en) * | 2020-05-21 | 2021-08-31 | 四川中烟工业有限责任公司 | Method for improving accumulated precision of cut stem blending |
| CN114451622A (en) * | 2020-12-31 | 2022-05-10 | 湖南博隆矿业开发有限公司 | Miner's cap |
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|---|---|---|---|---|
| CN1131524A (en) * | 1995-09-19 | 1996-09-25 | 林拯宏 | Safety helmet and its manufacture method |
| CN201124559Y (en) * | 2007-11-02 | 2008-10-01 | 联塑(杭州)机械有限公司 | Foaming plastic emission forming device |
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2008
- 2008-11-14 CN CN200810162452.4A patent/CN101417489B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131524A (en) * | 1995-09-19 | 1996-09-25 | 林拯宏 | Safety helmet and its manufacture method |
| CN201124559Y (en) * | 2007-11-02 | 2008-10-01 | 联塑(杭州)机械有限公司 | Foaming plastic emission forming device |
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