CN1389337A - Small resin-formed product and its injection moulding method and metal mould - Google Patents
Small resin-formed product and its injection moulding method and metal mould Download PDFInfo
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- CN1389337A CN1389337A CN 02121772 CN02121772A CN1389337A CN 1389337 A CN1389337 A CN 1389337A CN 02121772 CN02121772 CN 02121772 CN 02121772 A CN02121772 A CN 02121772A CN 1389337 A CN1389337 A CN 1389337A
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Abstract
A molded product is obtained by injection-molding a resin material composed mainly of a polyethylene terephthalate and has a long structural part with a sectional shape, formed of a web and a flange, which is continuous in the longer direction and a tab part jutting out of a part of the web or the flange, in the longer direction, of the long structural part. In addition, a gate mark remaining after cutting a gate during injection molding is admitted in the plane part of the tab part. Thus, a molded product of polyethylene terephthalate, which shortens time for an operating cycle of an injection molding machine by realizing the automatic cutting of a gate and withstands a practical strength, is provided.
Description
Technical field
The present invention relates to a kind of resin material be carried out the technology that injection molding forming is made formed products, this resin material is so that (ペ Star ト/pet) the typical resin material of the material of bottle is that PETG is a principal component as little.
Background technology
PETG is the crystalline resin material, but has tough, creep and tired little, good electric performance organic solvent-resistant and oil, good character such as nontoxic.PETG is used as the material of so-called bottle more.
Recently, be conceived to its advantageous property, attempt through pulverizing, clean, dehydration, dry operation be the bottle materialization of finishing using, from the crushed material shaping regenerate of the PETG of regeneration.Yet, mainly only be to be regenerated as thin-film material or fibrous material.
The applicant etc. successfully carry out injection molding forming to PETG and have made formed products through all effort.The injection molding forming of PETG is difficult to one of the reason of carrying out and is the orientation phenomenon of polymer.Promptly, will be after the PETG that has melted under the high temperature (for example 300 ℃) be expelled to the metal pattern that is made of formpiston and former and forms, as cooling off lentamente, then the crystallization direction of the polymer of PETG becomes consistent.In addition, PETG being applied rapid physical impact (for example rapid pressure descends) also can make the crystallization direction of polymer become consistent.This phenomenon is called the orientation phenomenon, take place as this phenomenon, then formed products albefaction, albefaction the position be highly brittle.For example, result from suspension hook as sundry goods as this orientation phenomenon, when then under daily type of service, using, may be from albefaction the position break.
The applicant is by forming formed products the structure of the longitudinal member with section that web portion and flange part by thin-walled (for example about 1.5mm) constitute, and the cooling when making injection molding forming is easy, has prevented the orientation phenomenon.The PETG that is expelled to the molten state in the space, interval of metal pattern is by the metal surface cooling and solidify.Because the thinner thickness in space so the cooling in metal pattern is carried out rapidly, suppresses the orientation phenomenon of PETG at interval.
In the injection moulding process, molten resin material is flow into be formed at the space suitable at the junction surface (being called die parting line) when engaging formpiston and former to form with formed products.This injection molding forming is provided with down gate, runner gate, ingate with metal pattern as the passage that is used for the moulding material inflow.Down gate is the inflow path from the part that links to each other with the forming machine nozzle to runner gate.Runner gate is the flow channel from the down gate to the formed products.The occasion of clamping the die parting line setting is more.The section of runner gate is generally circle, but die parting line one-sided can work trapezoidal practical.In obtaining a plurality of metal patterns, the configuration of formed products and runner gate is very important.Down gate and runner gate take out more common after shaping.Ingate is for flowing into the inlet of formed products from runner gate.Ingate is a principle to be arranged at thick wall part near the central authorities of formed products.
After the shaping, runner gate cuts off in ingate portion from formed products.As typical ingate, have direct-type ingate, side formula ingate, tunnel type ingate, and fan-shaped ingate etc., but be that the resin material formed products of main component mainly uses the direct-type ingate with the PETG.
The direct-type ingate is down gate becomes ingate according to former state a form.Though be shaped easily, must after shaping, excise.When the intermediate of shaping ampoule, use.
Fan formula ingate is with the fan-shaped form that flows into formed products of expanding from runner gate.Be suitable for wide flat board, be suitable for the material of mobile difference.Ingate need excise after shaping.
As be above-mentioned ingate, then do not produce the orientation phenomenon at formed products, can obtain good formed products.Yet, after shaping, need to excise ingate.In addition, in the injection molding forming operation, in order to excise ingate, the ingate cutter is installed to the ingate portion of metal pattern, carries out injection molding forming, when the temperature of ingate portion reaches set point of temperature by ingate cutter excision ingate.
On the other hand, have such mode, that is, after carrying out injection molding forming and making the formed products cooling, when opening formpiston and former, automatically excise ingate.When this mode of employing, for example adopt the tunnel type ingate.The tunnel type ingate is the ingate that is arranged on the inconspicuous position of the inboard of formed products and side, does not need the ingate portion that cuts off is processed.Yet, because ingate portion is easy to become elongated, so pressure descends big.As use the tunnel type ingate that PETG is carried out injection molding forming, then near the ingate of formed products, produce the orientation phenomenon.
For cooling forming product rapidly, even reduce the wall thickness of product, also produce the orientation phenomenon, the pressure big reason that descends in the time of can thinking to inject in ingate portion.
Therefore, in the injection molding forming of PETG, it is generally acknowledged,, do not use the direct-type ingate, then can not carry out injection molding forming for the simple shape that can fully cool off (for example little doleiform).
In the metal pattern that adopts above-mentioned direct-type ingate, carry out the occasion of injection molding forming, behind the injection molding forming, need the excision ingate, the problem that existence can not be produced in enormous quantities.
In addition, in metal pattern, carry out the occasion of injection molding forming by combination ingate and ingate cutter, carry out the injection molding forming operation after, as without the ingate cutting action, then can not open metal pattern, existence can not be shortened the problem in the cycle of injection molding machine.
On the other hand, ingate cutting action after the injection molding forming by the metal pattern of the tunnel type ingate that adopts the automatic cutting can carry out ingate does not need injection molding forming, can improve the cycle of injection molding machine, but produce the orientation phenomenon at formed products as described above, formed products becomes fragile, so, the problem that existence can not be adopted.
Though can add the additive (for example isophthalic acid) that suppresses the orientation phenomenon in the resin that with the PETG is principal component, it is expensive that material becomes.
Particularly in the utilization of attempting in recent years again, to cycle of shortening injection molding machine, high with the cry of the formed products of low-cost production's high-quality for the material of finishing using.At the raw material with this bottle is that PETG is not add the additive (for example isophthalic acid) that suppresses above-mentioned orientation phenomenon in the resin of main material.In the manufacturing of bottle, because the simple shape of bottle, cooling are easily and use the hot runner gate of band direct-type ingate and band valve-type ingate, so, no matter whether use the resin material that does not add above-mentioned additive, do not produce the orientation phenomenon.As complex-shaped formed products being carried out injection molding forming, then be easy to produce the orientation phenomenon at this formed products by this bottle material.
Summary of the invention
The present invention is exactly in view of the above problems and proposes, and its purpose is to provide a kind of automatic cutting that realizes ingate, shorten the cycle of injection molding machine, can bear formed products and manufacturing process and its metal pattern of the PETG of practical intensity.
In order to achieve the above object, the formed products of being made by the injection molding forming that with PETG of the present invention is the resin material of principal component has the section configuration that formed by web and flange towards vertically continuous longitudinal structure portion (long hand structure portion) with from the web of the part longitudinally of above-mentioned longitudinal structure portion or the lug boss of flange protrusion, the ingate vestige that forms after the planar section of above-mentioned lug boss has ingate when excising injection molding forming.
According to the invention described above, the formed products of being made by the injection molding forming that with the PETG is the resin material of principal component has longitudinal structure portion and lug boss, the section configuration of longitudinal structure portion is formed by web and flange, lug boss protrudes from its web or flange, planar section at lug boss has the ingate vestige, so, resin material around the ingate vestige of lug boss produces the orientation phenomenon, but the resin material in longitudinal structure portion is difficult for producing the orientation phenomenon, can keep all intensity of formed products.
In addition, also the metal pattern that can cut ingate automatically can be easily formed, like this, the cycle of injection molding forming can be shortened.
In addition, the above-mentioned lug boss of formed products of the present invention has bend between stiff end and free end, and above-mentioned ingate vestige is present in the planar portions of above-mentioned free end side.
Formation according to the invention described above, the ingate vestige is in the planar portions of above-mentioned free end side, lug boss has bend, so, can suppress by the bend of lug boss from the orientation phenomenon of the ingate generation of lug boss, be difficult for producing the orientation phenomenon, can further keep all intensity of formed products in longitudinal structure portion.
In addition, the above-mentioned resin material of formed products of the present invention is the flinders of the bottle after finishing using.
According to the invention described above, even resin material is the flinders of the bottle after finishing using, also can make the high formed products of intensity, realize the utilization again of resource.
In addition, injection moulding method of the present invention will be that the resin material of principal component is expelled to and makes formed products in the metal pattern that is made of formpiston and former with the PETG; Wherein, preparation has vertical (microscler) space, protruding space, reaches the metal pattern of flow channel, injects above-mentioned resin material by above-mentioned flow channel to above-mentioned metal pattern; This longitudinal space constitutes by the space that forms the section configuration that is formed by web portion and flange part along the border that cooperates formpiston and former continuously; This projection space is made of the space of the specific thickness that web portion or flange part from the part of above-mentioned longitudinal space protrude; This flow channel is communicated with the ingate of the wall portion that is located at protruding space.
Formation according to the invention described above, the formed products of being made by the injection molding forming that with the PETG is the resin material of principal component has longitudinal structure portion and lug boss, the section configuration of longitudinal structure portion is made of web and flange, lug boss protrudes from this web or flange, planar section at lug boss has the ingate vestige, so, resin material around the ingate vestige of lug boss produces the orientation phenomenon, but the resin material in longitudinal structure structure portion does not produce the orientation phenomenon, and all intensity of formed products is kept.
In addition, the above-mentioned lug boss space of injection moulding method of the present invention has bend between stiff end and free end, and above-mentioned ingate is in the wall portion in the space of above-mentioned free end side.
Formation according to the invention described above, the ingate vestige is in the planar portions of above-mentioned free end side, lug boss has bend, so, the orientation phenomenon that produces from the ingate of lug boss is suppressed by the bend of lug boss, be difficult for producing the orientation phenomenon in longitudinal structure portion, all intensity of formed products is further kept.
In addition, the above-mentioned resin material of injection moulding method of the present invention is the flinders of the bottle after finishing using.
According to the invention described above, even resin material is the flinders of the bottle after finishing using, also can make the high formed products of intensity, realize the utilization again of resource.
In addition, the metal pattern used of the injection molding forming of resin material of the present invention has longitudinal space, protruding space, and flow channel; This longitudinal space constitutes by the space that forms the section configuration that is formed by web portion and flange part along the border that cooperates formpiston and former continuously; This projection space is made of the space of the specific thickness that web portion or flange part from vertical part of above-mentioned longitudinal space protrude; This flow channel is communicated with the ingate of the wall portion that is located at protruding space.
Formation according to the invention described above, when making formed products by the injection molding forming that with the PETG is the resin material of principal component, its formed products has longitudinal structure portion and lug boss, the section configuration of longitudinal structure portion is made of web and flange, lug boss protrudes from its web or flange, planar section at lug boss has the ingate vestige, so, though the resin material around the ingate vestige of lug boss produces the orientation phenomenon, but the resin material in longitudinal structure portion does not produce the orientation phenomenon, and all intensity of formed products is kept.
In addition, the above-mentioned lug boss space of metal pattern of the present invention has bend between stiff end and free end, and above-mentioned ingate is in the wall portion in the space of above-mentioned free end side.
Formation according to the invention described above, the ingate vestige is in the planar portions of above-mentioned free end side, lug boss has bend, so, the orientation phenomenon that produces from the ingate of lug boss is suppressed by the bend of lug boss, be difficult for producing the orientation phenomenon in longitudinal structure portion, all intensity of formed products is further kept.
Description of drawings
Fig. 1 is front elevation, side view, and the partial detailed figure of the invention process form.
Fig. 2 is the structural map in the space of the structural map of the invention process form and metal pattern.
Fig. 3 is the structural map in the space of the structural map of the invention process form and metal pattern.
Fig. 4 is the precedence diagram of the injection molding forming of form of implementation of the present invention.
The sectional drawing of the metal pattern when Fig. 5 is the injection molding forming of the invention process form.
The specific embodiment
The preferred embodiment of the present invention is described with reference to the accompanying drawings.In each figure, identical part adopts identical symbol, omits repeat specification.
The following describes the structure of the formed products of form of implementation of the present invention.Fig. 1 is front elevation, side view, and the partial detailed figure of the invention process form.
Formed products 10 is for being the injection molding forming product of the resin material of principal component with the PETG.PETG can be the feed particles of dispatching from the factory from factory, also can be from the thin slice of the bottle regeneration of finishing using, but from economic considerations, is preferably from the thin slice of the bottle regeneration of finishing using.
Below, be that the occasion that necktie is linked up with is that example describes with formed products 10.Formed products 10 has hook portion X1 and the necktie hook X2 of portion.The end of hook portion X1 forms the shape that engages with the central authorities of the necktie hook X2 of portion.Hook portion X1 and the necktie hook X2 of portion are the longitudinal structure portion of regulation section configuration.The section configuration of longitudinal structure portion is by web 11 and 2 so-called H type shapes that flange 13 constitutes.At the central portion of the joint flange up and down 12 of web 11, form mainly by flange 12 up and down and be bearing in the formed tensile stress of main bending force that produces under the common using method of formed products 10 and the structure of compression stress.The thickness t 1 of flange part and the thickness t 2 of web portion are preferably 1.4mm-1.5mm.When forming the thickness of this degree, the cooling during injection molding forming is good, and PETG is transparent.Certainly, the technology of injection molding forming is determined according to the rule of thumb mostly, is not strictly can not surpass 1.5mm, and no matter temperature conditions and the favourable occasion of flox condition when injection are thick more all no problem.
At flange 12 lug boss 13 is set near the hook portion X1 at the junction surface of hook portion X1 and the necktie hook X2 of portion.This lug boss 13 has the thickness identical with the thickness t 1 of flange 12, protrudes as flange 12 with prolonging.The end of the one-sided and flange 12 of lug boss 13 is integrated, the button-type that cuts half of another distolateral formation band circle.In Fig. 2,2 lug bosses are located at the flange part up and down of regulation section, but a side lug boss is the so-called dummy load for setting attractive in appearance.Lug boss with function of the application is in 2 lug bosses one (below be referred to as lug boss 13).
The ingate vestige 14 that forms after folding falls is in the forward slightly end place of the planar portions of lug boss 13.When carrying out injection molding forming, at this ingate vestige 14 flow channel is set, the PETG that injects with fusing from this flow channel is the resin material of principal component.
Produce orientation phenomenon, the resin albefaction after the curing at the regional H of flange part from the ingate vestige 14 of lug boss to hook portion.
The section configuration of longitudinal structure portion and lug boss can adopt different shape.As its general shape, longitudinal structure portion makes the section configuration that is formed by the web of thin-walled and flange continuous towards length direction in the longitudinal direction.Lug boss is the structure that protrudes from the web of the part of the length direction of above-mentioned longitudinal structure portion or flange.Describe the section configuration of this longitudinal structure portion and the shape of lug boss below with reference to the accompanying drawings in detail.Fig. 2 is the structural map with space of the structural map of longitudinal structure portion of H type section configuration and metal pattern.Fig. 3 is the structural map with space of the structural map of longitudinal structure portion of grooved section configuration and metal pattern.
(A) length structure portion has the section configuration of H type structure.H type section is at the upper and lower joint flange 12 of the web 11 of lengthwise.Lug boss 13 protrudes as the part prolongation of flange part.The thickness of lug boss 13 is identical substantially with the thickness of flange 12.One side of lug boss 13 and the end of flange 12 are integrated, and the other end is the circular button shape that cuts half of band.
Junction surface (to call die parting line in the following text) with the former and the formpiston of metal pattern is that the center is the space that there is the section configuration of longitudinal structure portion symmetrically in line.The space of section configuration is made of web portion space 11c and flange part space 12c.In addition, there is lug boss space 13c in the side at flange part space 12c.There is ingate space 14c in a position in the wall portion in this lug boss space, is communicated with injection mould cold burden notch space (to call the spill space in the following text) 35c at this ingate space 14c.Be communicated with the 2nd down gate space 34c at injection mould cold burden notch space 35c.
(B) longitudinal structure portion has the section configuration of H type structure.H type section is at the upper and lower joint flange 12 of the web 11 of lengthwise.Lug boss 15 prolongs central portion protrusion from web 11 as the part of web 11.The thickness of lug boss 15 is identical substantially with the thickness of web 11.Lug boss 15 is the L font shape with bend, and the central portion of a side and flange 12 is integrated, and the free-ended other end is the circular button shape that cuts half of band.
Die parting line with metal pattern is that the center is the space that there is the section configuration of longitudinal structure portion symmetrically in line.The space of section configuration is made of web portion space 11c and flange part space 12c.In addition, there is lug boss space 15c in the central authorities at flange part space 12c.Lug boss space 15c is the L font with bend, has ingate space 16c at a position of the wall of this lug boss space 15c, is communicated with the leading section of injection mould cold burden notch space 35c at this ingate space 16c.In addition, be communicated with the 2nd down gate space 34c at injection mould cold burden notch space 35c.
(C) longitudinal structure portion has the section configuration of H type structure.H type section is at the upper and lower joint flange 12 of the web 11 of lengthwise.Lug boss 17 prolongs the central portion protrusion of ground from web 11 as the part of web 11.The thickness of lug boss 17 is identical substantially with the thickness of web 11.One end of lug boss 17 and the central portion of flange 12 are integrated, and the free-ended other end is the circular button shaped that cuts half of band.
Die parting line with metal pattern is that the center is the space that there is the section configuration of longitudinal structure portion in symmetry shape ground.The space of section configuration is made of web portion space 11c and flange part space 12c.Lug boss space 17c is in the central authorities of flange part space 12c.There is ingate space 18c in a part in the planar portions of lug boss space 17c, is communicated with the leading section of the 2nd down gate space 34c at this ingate space 18c.
(D) longitudinal structure portion 20 has the section configuration of grooved structure.The grooved section is in the upper and lower joint flange portion 22 of the web portion 21 of lengthwise.Lug boss 23 prolongs the ground protrusion as the part of flange part 22.The thickness of lug boss 23 is identical substantially with the thickness of flange part 22.One side of lug boss 23 and the end of flange part 22 are integrated, and the other end is the circular button shape that cuts half of band.
There are the space of the section configuration of longitudinal structure portion in the die parting line of metal pattern and the Central Line of web portion space 21c with overlapping.The space of section configuration is made of web portion space 21c and flange part space 22c.There is lug boss space 23c in a side at flange part space 22c.There is ingate space 24c in a position at the wall of this lug boss space 23c, is communicated with the leading section of injection mould cold burden notch space 35c at this ingate space 24c.In addition, be communicated with the 2nd down gate space 34c at injection mould cold burden notch space 35c.
(E) longitudinal structure portion (20) has the section configuration of grooved structure.The grooved section is in the upper and lower joint flange portion 22 of the web portion 21 of lengthwise.Lug boss 25 prolongs the end protrusion of ground from flange part 22 as the part of web portion 21.The thickness of lug boss 25 is identical substantially with the thickness of web portion 21.Lug boss 25 is the L font shape with bend, and the end of an end and flange part 22 is integrated, and the free-ended other end is the circular button shape that cuts half of band.
There is the space of the section configuration of longitudinal structure portion in the Central Line ground that the die parting line of metal pattern becomes web portion space 21c.The space of section configuration is made of web portion space 21c and flange part space 22c.There is lug boss space 25c in the end of flange part space 22c.Lug boss space 25c is the L font with bend, has ingate space 26c at a position of the wall of this lug boss space 25c, is communicated with the leading section of injection mould cold burden notch space 35c at this ingate space 26c.Be communicated with the 2nd down gate space 34c at injection mould cold burden notch space 35c.
(F) longitudinal structure portion (20) has the section configuration of grooved structure.The grooved section is in the upper and lower joint flange portion 22 of the web portion 21 of lengthwise.Lug boss 27 prolongs the end protrusion of ground from flange part 22 as the part of web portion 21.The thickness of lug boss 27 is identical substantially with the thickness of web portion 21.One end of lug boss 27 and the end of flange part 22 are integrated, and the free-ended other end is the circular button shape that cuts half of band.
There is the space of the section configuration of longitudinal structure portion in the Central Line ground that the die parting line of metal pattern becomes web portion space 21c.The space of section configuration is made of web portion space 21c and flange part space 22c.There is lug boss space 27c in the end of flange part space 22c.There is ingate space 28c in a position in the planar portions of lug boss space 27c, connects the leading section of the 2nd down gate space 34c at this ingate space 28c.
Below, the order of the injection molding forming of resin material is described.The regrown material of the bottle of finishing using is more favourable to economy, so, be that example describes with the occasion of making the moulding product from the bottle of finishing using.Fig. 4 is the precedence diagram of the injection molding forming of form of implementation of the present invention.
(AA) reclaim the bottle 50 of finishing using.Remove the label and the lid and it is clean of the bottle of finishing using.
(BB) broken bottle forms laminar and dry.
(CC) dry is the thin slice of principal component with the PETG, puts into injection molding machine 40, is expelled to metal pattern 30.Metal pattern is carried out water-cooled.
(DD) fully descend as the temperature of resin and solidify, then open the former and the formpiston of metal pattern 30.Automatically excision connects the ingate of formed products and runner gate, takes out formed products 10,20.
Below, according to the appearance of figure explanation by the metal pattern injection molding forming.The sectional drawing of the metal pattern when Fig. 5 is injection molding forming.Metal pattern 30 has former 32 and formpiston 31.Die parting line between formpiston 31 and former 32 offers and is used for space that formed products is formed.Form down gate and runner gate at former.In addition, knock-pin 36 is encased in the formpiston.In addition, metal pattern is by the cooling of water cooling plant (not shown), and the surface of metal pattern maintains 20 ℃ substantially.
By the pilot pin (not shown) to former 32 and formpiston 31 channeling conducts and make its cooperation.Feeding screw (not shown) by injection molding machine 40 is supplied with thin slice.The frictional heat of the thin slice of supplying with during by the heat of external heat and feed heats up.Thin slice melts about 300 ℃, and becoming with the PETG is the resin of principal component, is expelled to metal pattern.Molten resin material is expelled to the space of formed products from ingate via middle straight cast gate (the 1st down gate) 33, runner gate, the 2nd down gate 34, injection mould cold burden notch (accumulating the place) 35.Resin material is filled in the space of metal pattern, is solidified by the metal pattern cooling.
Longitudinal structure portion is owing to be thin-walled, so, cool off sharp from the surface of metal pattern and solidify, do not produce the orientation phenomenon, transparency is very good.On the other hand, at lug boss, from link near the ingate vestige longitudinal structure portion near resin material produce orientation phenomenon, albefaction.
By pilot pin to formpiston 31 and former 32 channeling conducts open, formed products is stayed formpiston 31, partly cut off formed products and clout at ingate.Knock-pin 36 is released formed products from formpiston 31.Automatically separate with ingate with clout all-in-one-piece down gate with formed products and be removed.
As use formed products, injection molding method, and the metal pattern of above-mentioned form of implementation, the resin material that then with the PETG is principal component is expelled to the metal pattern that has with the identical shaped space of formed products from the ingate on the plane of being located at lug boss, and resin material flows to longitudinal structure portion via lug boss.The orientation phenomenon produces at lug boss, so the hardness of lug boss improves and becomes fragile.Yet, owing to do not produce the orientation phenomenon in longitudinal structure portion, so, the deterioration of all intensity of formed products do not produced.
Be the occasion of the L font with bend at lug boss, the orientation phenomenon of resin material is suppressed by bend, and the resin material that produces the orientation phenomenon does not flow to longitudinal structure portion, so all intensity of formed products is further deterioration not.
In addition, as the flinders of the bottle of will the finish using raw material as resin material, even then for being easy to produce the composition of orientation phenomenon, the resin material that yet can be produced on longitudinal structure portion does not produce the formed products of orientation phenomenon, realizes the utilization again of resource.
In addition, owing to be difficult for producing the orientation phenomenon in longitudinal structure portion, so, even for example during plum rains, also can stably carry out injection molding forming to formed products in injection molding forming condition difference.
The invention is not restricted to above-mentioned form of implementation, can in the scope that does not break away from the invention main idea, carry out various changes.
The front has illustrated the section configuration of longitudinal structure portion with H type and grooved, but is not limited thereto, and for example also can be T type, E type, F type, mountain type, I type or ball flat pattern etc.
Though be illustrated at the thickness of the thickness of lug boss and the web portion of longitudinal structure portion and the identical substantially occasion of thickness of flange part, be not limited thereto, as long as for do not produce the thickness of orientation phenomenon in length structure portion.
Be illustrated though cut the occasion of the button shape of half being shaped as of lug boss, be not limited thereto, for example also can be square or triangle.
Though be illustrated from the edge of flange part and the example of central portion protrusion with lug boss, be not limited thereto, for example also can be from the optional position of flange part and the protrusions such as central portion of web portion.
Though the occasion that does not produce in longitudinal structure portion in the lug boss generation with the orientation phenomenon is illustrated, but because the physical boundary of lug boss and longitudinal structure portion is not obvious, so, even the resin material that produces the orientation phenomenon is in the border in shape of lug boss and longitudinal structure portion, but as long as formed products does not all become fragile.
As described above, formed products of the present invention, injection molding method, and metal Mould is made of it and has following effect.
Injection molding forming system by the resin material take PETG as principal component The formed products of doing has longitudinal structure section and lug boss, although in week of the ingate vestige of lug boss The resin material that encloses produces the orientation phenomenon, but does not produce orientation now at the resin material of longitudinal structure section Resemble, all intensity of formed products does not descend.
In addition, also can easily form can the surface trimming ingate metal pattern, like this, can contract The cycle of short injection molding forming.
In addition, the orientation phenomenon that produces from the ingate of lug boss is suppressed by the bend at lug boss, Be difficult for forming the orientation phenomenon in longitudinal structure section, can further keep all intensity of formed products.
In addition, even the flinders of the bottle after will finishing using also can be made as resin material The formed products that intensity is high, the recycling of realization resource.
Therefore, can provide the surface trimming that can realize ingate, shorten injection molding machine Cycle, formed products and the shaping side thereof that can bear the PETG of practical intensity Method and its metal pattern.
Claims (8)
1. a formed products is made by the injection molding forming that with the PETG is the resin material of principal component; It is characterized in that:
Have the section configuration that forms by web and flange towards vertically continuous longitudinal structure portion with from the web of vertical part of above-mentioned longitudinal structure portion or the lug boss that flange protrudes,
The ingate vestige that forms behind the ingate when the planar section of above-mentioned lug boss has the excision injection molding forming.
2. formed products according to claim 1 is characterized in that: above-mentioned lug boss has bend between stiff end and free end, and above-mentioned ingate vestige is present in the planar portions of above-mentioned free end side.
3. formed products according to claim 1 and 2 is characterized in that: above-mentioned resin material is the flinders of the bottle after finishing using.
4. injection moulding method will be that the resin material of principal component is expelled in the metal pattern that is made of formpiston and former and makes formed products with the PETG; It is characterized in that:
Preparation has longitudinal space, protruding space, reaches the metal pattern of flow channel, and this longitudinal space constitutes by the space that forms the section configuration that is formed by web portion and flange part along the border that cooperates formpiston and former continuously; This projection space is made of the space of the specific thickness that web portion or flange part from the part of above-mentioned longitudinal space protrude; This flow channel is communicated with the ingate of the wall portion that is located at protruding space,
Inject above-mentioned resin material by above-mentioned flow channel to above-mentioned metal pattern.
5. injection moulding method according to claim 4 is characterized in that: above-mentioned protruding space has bend between said fixing end and free end, and above-mentioned ingate is in the wall portion in the space of above-mentioned free end side.
6. according to claim 4 or 5 described injection moulding methods, it is characterized in that: above-mentioned resin material is the flinders of the bottle after finishing using.
7. metal pattern is used for the injection molding forming of resin material; It is characterized in that comprising: longitudinal space, protruding space, and flow channel;
This longitudinal space constitutes by the space that forms the section configuration that is formed by web portion and flange part along the border that cooperates formpiston and former continuously;
This projection space is made of the space of the specific thickness that web portion or flange part from vertical part of above-mentioned longitudinal space protrude;
This flow channel is communicated with the ingate of the wall portion that is located at protruding space.
8. metal pattern according to claim 7 is characterized in that: above-mentioned protruding space has bend between stiff end and free end, and above-mentioned ingate is in the wall portion in the space of above-mentioned free end side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP166023/2001 | 2001-06-01 | ||
| JP2001166023A JP3811021B2 (en) | 2001-06-01 | 2001-06-01 | PET resin moldings, injection molding methods and molds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389337A true CN1389337A (en) | 2003-01-08 |
| CN1321792C CN1321792C (en) | 2007-06-20 |
Family
ID=19008617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021217726A Expired - Fee Related CN1321792C (en) | 2001-06-01 | 2002-05-31 | Small resin-formed product and its injection moulding method and metal mould |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3811021B2 (en) |
| CN (1) | CN1321792C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152452A (en) * | 2009-12-04 | 2011-08-17 | 日本电产株式会社 | Method and apparatus for production of resin molded article, and manufacturing method of turntable |
| CN102267214A (en) * | 2010-06-07 | 2011-12-07 | 松下电器产业株式会社 | Resin molding method, die device, and resin molded article |
| CN103085228A (en) * | 2011-10-27 | 2013-05-08 | 丰田纺织株式会社 | Molded structure body and method of producing the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015066846A (en) * | 2013-09-30 | 2015-04-13 | Dic株式会社 | Method for producing structure and method for producing battery lid |
| CN103978635B (en) * | 2014-04-21 | 2016-04-20 | 上海翔洲电气科技有限公司 | A kind of Shooting Technique of mining hanging type cable hook |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1022748C (en) * | 1987-12-07 | 1993-11-17 | 索诺科产品有限公司 | Intermediate article of wide mouth container |
| US4993931A (en) * | 1988-07-21 | 1991-02-19 | Sabel Plastechs, Inc. | Apparatus for making a hollow polyethylene terephthalate blow molded article with an integral external projection such as a handle |
| CN2145154Y (en) * | 1992-12-24 | 1993-11-03 | 浙江大众聚酯瓶厂 | Plastic kettle inlaid with handle |
| CN2276411Y (en) * | 1996-07-08 | 1998-03-18 | 成都新星高技术应用研究所 | Shampoo bottle polyester pipe base |
| JP2000037144A (en) * | 1998-07-23 | 2000-02-08 | Haruo Fujimoto | Raft for water culture of edible plant, for purification of water quality, and forming live reef |
-
2001
- 2001-06-01 JP JP2001166023A patent/JP3811021B2/en not_active Expired - Fee Related
-
2002
- 2002-05-31 CN CNB021217726A patent/CN1321792C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152452A (en) * | 2009-12-04 | 2011-08-17 | 日本电产株式会社 | Method and apparatus for production of resin molded article, and manufacturing method of turntable |
| CN102152452B (en) * | 2009-12-04 | 2014-10-08 | 日本电产株式会社 | Method and apparatus for production of resin molded article, and manufacturing method of turntable |
| CN102267214A (en) * | 2010-06-07 | 2011-12-07 | 松下电器产业株式会社 | Resin molding method, die device, and resin molded article |
| CN102267214B (en) * | 2010-06-07 | 2013-12-25 | 松下电器产业株式会社 | Resin molding method and die device |
| CN103085228A (en) * | 2011-10-27 | 2013-05-08 | 丰田纺织株式会社 | Molded structure body and method of producing the same |
| CN103085228B (en) * | 2011-10-27 | 2015-09-09 | 丰田纺织株式会社 | The method of shaping structure body and production shaping tectosome |
| US9364979B2 (en) | 2011-10-27 | 2016-06-14 | Toyota Boshoku Kabushiki Kaisha | Molded structure body and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3811021B2 (en) | 2006-08-16 |
| JP2002355864A (en) | 2002-12-10 |
| CN1321792C (en) | 2007-06-20 |
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