TWI476091B - Production method of injection molded article - Google Patents
Production method of injection molded article Download PDFInfo
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- TWI476091B TWI476091B TW098117030A TW98117030A TWI476091B TW I476091 B TWI476091 B TW I476091B TW 098117030 A TW098117030 A TW 098117030A TW 98117030 A TW98117030 A TW 98117030A TW I476091 B TWI476091 B TW I476091B
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- Taiwan
- Prior art keywords
- resin
- molded article
- injection
- retention
- welded portion
- Prior art date
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- 238000002347 injection Methods 0.000 title claims description 54
- 239000007924 injection Substances 0.000 title claims description 54
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- 229920005989 resin Polymers 0.000 claims description 141
- 239000011347 resin Substances 0.000 claims description 141
- 230000014759 maintenance of location Effects 0.000 claims description 92
- 238000003466 welding Methods 0.000 claims description 17
- 230000004927 fusion Effects 0.000 claims description 11
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 6
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims 2
- 238000005452 bending Methods 0.000 description 25
- 238000000034 method Methods 0.000 description 25
- 230000000694 effects Effects 0.000 description 11
- 238000001746 injection moulding Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229920006038 crystalline resin Polymers 0.000 description 2
- 239000012765 fibrous filler Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 239000004974 Thermotropic liquid crystal Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0044—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks expelling moulding material outside the mould cavity at the weld line location
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
本發明係關於可以改善熔接部強度的射出成形品之製造方法。The present invention relates to a method of producing an injection-molded article which can improve the strength of a welded portion.
就一般的射出成形加工而言，在採用多點澆口之場合，必然會產生熔接現象。熔接會產生在成形體之表面上，對應於從澆***出至模具之模穴中的熔融樹脂於產生分岐後，又再次合流而形成的合流部位置，即使便是採用單點澆口，就例如在進行具有較大偏肉比之射出成形品或是設置有埋入銷之射出成形品的射出成形時之場合亦然。亦即所謂熔接是指熔融樹脂流在合流時所形成的合流界面，出現於成形體的表面而顯示其接合部位。In the case of a general injection molding process, when a multi-point gate is used, a fusion phenomenon is inevitably caused. The welding is produced on the surface of the formed body, corresponding to the position of the junction formed by the molten resin which is ejected from the gate to the cavity of the mold after the splitting is generated, and even if a single point gate is used, For example, it is also possible to perform injection molding of an injection molded article having a large partial meat ratio or an injection molded article having a buried pin. That is, the term "welding" refers to a joining interface formed by a flow of a molten resin at the time of joining, and appears on the surface of the molded body to show a joint portion thereof.
這種成形品上的熔接，大多是由於上述各種要因重合後而發生，以現實上具有複雜形狀之成形品而言，要作出不發生熔接的成形品是極為困難。在此類之熔接部上，不僅因為產生線狀模樣的所謂熔接痕(Weld mark)而損及外觀，就以熔融樹脂僅是單純的合流而融著形成一體化來說，亦可能無法讓樹脂形成均勻的混合，而產生只能得到遠低於樹脂原本所應具有強度的重大問題。The welding on such a molded article is often caused by the above-mentioned various factors being superposed, and it is extremely difficult to form a molded article which does not have a welded shape in a molded article having a complicated shape. In such a welded portion, not only the so-called weld line (Weld mark) which causes a linear pattern is used, but the appearance is impaired, and the molten resin is simply integrated and melted to form an integration, and the resin may not be allowed. The formation of a uniform mixture produces only a significant problem that is far below the strength that the resin should have.
針對熔接部強度低下問題的改善方法，就以經由流道(Runner)再從複數個澆口而將熔融樹脂射出至模具之模穴中，並於該模具之模穴內對應至由複數處熔融樹脂流合流後之合流部的位置，而在成形體的表面形成熔接部的熱向性(Thermo tropic)液晶聚合物之射出成形方法而言，為了讓上述合流熔融樹脂流中之一處在上述合流部形成實質上的合流之後，能保有可以繼續流動的容積而作出與上述模具中模穴不同之另外的模穴，並將該模穴設置於上述複數個澆口其中一個澆口近旁的流道部上的方法係已公開周知(請參照專利文獻1)。For the improvement of the problem of low strength of the welded portion, the molten resin is injected from a plurality of gates into the cavity of the mold through a runner, and is melted in the cavity of the mold to a plurality of places. In the injection molding method of the thermotropic liquid crystal polymer in which the position of the merging portion after the flow of the resin is merged and the surface of the molded body is formed, in order to allow one of the above-mentioned merged molten resin streams to be in the above-mentioned manner After the merging portion forms a substantial confluence, a volume which can continue to flow can be maintained to make another cavity different from the cavity in the mold, and the cavity is disposed in the flow near one of the plurality of gates The method on the road is well known (please refer to Patent Document 1).
此外在使用的模具中，從射出之熔融充填樹脂的分流點開始，至該分流樹脂於合流後形成熔接部為止的各分流樹脂流路中至少一處，設置由成形品模穴中突出的樹脂滯留部，並內藏有可以進退活動的活塞(Piston)，而利用在形成熔接之後但內部的樹脂仍維持有流動性之時，讓熔接部中的樹脂產生移動，來打亂熔接部內樹脂或是充填劑的配向等，而有效的改善熔接部強度等方法及所使用的模具亦已公開周知(請參照專利文獻2)。Further, in the mold to be used, at least one of each of the shunt resin flow paths until the shunt resin forms a welded portion after joining is formed from the branching point of the molten molten resin to be injected, and the resin protruding from the cavity of the molded product is provided. a retaining portion, in which a piston (Piston) capable of advancing and retreating is contained, and when the resin is maintained to have fluidity after the fusion is formed, the resin in the welded portion is moved to disturb the resin in the welded portion or It is also known that the method of effectively improving the strength of the welded portion and the mold to be used are the alignment of the filler (see Patent Document 2).
改善熔接部強度低下之另一種方法，就以經由流道再從複數個澆口而將熔融樹脂射出至模具之模穴中，並於該模具之模穴內對應至由複數處熔融樹脂流合流後之合流部的位置，而在成形體上形成熔接部的熱可塑性樹脂組成物之射出成形方法而言，為了讓上述合流熔融樹脂流中之一處在上述合流部形成實質上的合流之後，能保有可以繼續流動的容積而作出樹脂滯留部，並將該樹脂滯留部突出而設置於上述模具之模穴或是至少一處流道上的方法亦已公開周知。Another method for improving the strength of the welded portion is to eject the molten resin from the plurality of gates through the flow path to the cavity of the mold, and corresponding to the flow of the molten resin in the cavity of the mold. In the injection molding method of the thermoplastic resin composition in which the welded portion is formed on the molded body, the position of the merged portion is formed so that one of the merged molten resin streams is substantially merged at the merged portion. A method of providing a resin retention portion capable of maintaining a volume that can continue to flow and protruding the resin retention portion to be provided in a cavity or at least one flow path of the mold is also known.
專利文獻1：特開平05-318517號公報Patent Document 1: Japanese Patent Publication No. 05-318517
專利文獻2：特開平06-008293號公報Patent Document 2: Japanese Patent Publication No. 06-008293
專利文獻3：特開平05-285990號公報Patent Document 3: Japanese Patent Publication No. 05-285990
就專利文獻1之方法而言並無適用於厚度3mm以下，而就專利文獻3之方法而言並無適用於厚度4mm以下之薄型成形品的先例。而專利文獻2中所記載方法在應用於薄型成形品之場合，亦無法充分的改善熔接部強度。然而在使用薄肉連接器(Connecter)等之薄型精密成形品進行嵌合時就產生了破裂等的問題。再加上近年來各種元件都在進行薄肉化，故改善薄型成形品在成形作業時熔接強度是一被追求改善之技術。The method of Patent Document 1 is not applicable to a thickness of 3 mm or less, and the method of Patent Document 3 does not have a precedent for a thin molded article having a thickness of 4 mm or less. On the other hand, when the method described in Patent Document 2 is applied to a thin molded article, the strength of the welded portion cannot be sufficiently improved. However, when a thin precision molded article such as a thin connector is used for fitting, a problem such as cracking occurs. Further, in recent years, various components have been thinned, so that the improvement of the fusion strength of the thin molded article during the forming operation is a technique that is sought to be improved.
此外專利文獻2、3之方法係關於在樹脂合流後使其再繼續流動的技術，就模具而言，樹脂滯留部的位置及體積是與樹脂之固化速度、成形品體積、另外亦和樹脂溫度、模具溫度、射出壓力等成形條件相互關連，故難以確切的來加以規定。因此能針對所期望的改善程度，能幾乎確切的來設定最佳之樹脂滯留部位置，而簡單的作出高品質的射出成形品來亦是一被追求之技術。Further, the methods of Patent Documents 2 and 3 relate to a technique of continuing the flow after the resin is joined. In the mold, the position and volume of the resin retention portion are the curing speed of the resin, the volume of the molded article, and the temperature of the resin. Forming conditions such as mold temperature and injection pressure are related to each other, so it is difficult to specify them precisely. Therefore, it is possible to set the optimum position of the resin retention portion almost exactly for the desired degree of improvement, and it is also a technique to be pursued simply to produce a high-quality injection molded article.
尤其是在採用專利文獻2之方法之場合，如將樹脂滯留部之體積加大時，雖然可以讓較多的樹脂在熔接部中移動，亦可以改善熔接強度，但因大型的樹脂滯留部會讓樹脂消耗量增多，並不符合實際需要，故盡可能的利用小型的樹脂滯留部來改善熔接強度亦是一被追求之技術。In particular, when the method of Patent Document 2 is employed, if the volume of the resin retention portion is increased, although a large amount of resin can be moved in the welded portion, the welding strength can be improved, but the large resin retention portion will be Reducing the amount of resin consumption does not meet the actual needs, so it is also a sought-after technique to use a small resin retention portion as much as possible to improve the welding strength.
本發明之目的是要提供一種射出成形品的製造方法，來解決以上所述之課題，並針對所期望的改善程度，能近乎確切的設定最佳之樹脂滯留部位置、樹脂滯留部體積，即使是對於薄型射出成形品亦可以充分的改善其熔接強度。An object of the present invention is to provide a method for producing an injection-molded article, which solves the above-mentioned problems, and which can accurately set the position of the resin retention portion and the volume of the resin retention portion in an almost exact manner. It is also possible to sufficiently improve the welding strength of the thin injection molded article.
本發明者為了解決上述等之課題而不斷的進行銳意研究。其結果、即是一種射出成形品之製造方法，在其所使用模具之模穴內，位於由複數處熔融樹脂流合流而形成熔接部之前的至少一處分流路上，於該熔接部之外而靠近熔接部之位置設置突出的樹脂滯留部，並且在將澆口中央部起至熔接部為止的成形品體積設為V，將前述V之中自熔接部至前述樹脂滯留部之注入口中央部為止的成形品體積設為Vo ，將前述樹脂滯留部的體積設為Vd 之場合，如果前述樹脂滯留部是被配置成能符合下述公式(1)之時，以此種射出成形品之製造方法即可找出以上的問題解決之道，並得以進一步達成本發明的成效。在本發明中並提供更具體的說明如下。The inventors of the present invention have continually conducted intensive studies in order to solve the above problems. As a result, it is a method for producing an injection molded article in which at least one of the branching paths before the molten resin is flowed to form a welded portion in a cavity of the mold to be used, and outside the welded portion The protruding resin retaining portion is provided at a position close to the welded portion, and the volume of the molded product from the center portion of the gate to the welded portion is V, and the center portion of the injection port from the self-welding portion to the resin retaining portion is formed. When the volume of the molded article is V o and the volume of the resin retention portion is V d , when the resin retention portion is disposed so as to conform to the following formula (1), the injection molded article is used. The manufacturing method can find out the above problem solving and further achieve the effect of the present invention. A more specific description is provided in the present invention and as follows.
(Vd /V)＞-71.4(Vo /V)3 +47.8(Vo /V)2 -10.0(Vo /V)+0.78 …(Ⅰ)(V d /V)>-71.4(V o /V) 3 +47.8(V o /V) 2 -10.0(V o /V)+0.78 (I)
(1)一種射出成形品之製造方法，在其所使用模具之模穴內，位於由複數處熔融樹脂流合流而形成熔接部之前的至少一處分流路上，於前述熔接部之外而靠近熔接部之處設置突出的樹脂滯留部，並且在將澆口中央部起至熔接部為止的成形品體積設為V，將前述V之中自熔接部至前述樹脂滯留部之注入口中央部為止的成形品體積設為Vo ，將前述樹脂滯留部的體積設為Vd 之場合，讓前述樹脂滯留部配置成能符合下述公式(Ⅰ)的射出成形品之製造方法。(1) A method for producing an injection-molded article, in which at least one of the branching paths before the molten resin is flowed to form a welded portion in a cavity of a mold to be used, and is welded to the outside of the welded portion The portion of the molded article from the center portion of the gate to the welded portion is set to V, and the portion of the V from the self-welding portion to the center of the injection port of the resin retention portion is provided. molded article to a volume V o, the volume of the resin case retention portion to V d, the resin so that the retention portion is configured to satisfy the following equation can manufacturing method (ⅰ) of the injection molded product.
(Vd /V)>-71.4(Vo /V)3 ＋47.8(Vo /V)2 -10.0(Vo /V)＋0.78 …(Ⅰ)(V d /V)>-71.4(V o /V) 3 +47.8(V o /V) 2 -10.0(V o /V)+0.78 (I)
(2)一種射出成形品之製造方法，在其所使用模具之模穴內，位於由複數處熔融樹脂流合流而形成熔接部之前的至少一處分流路上，於前述熔接部之外而靠近熔接部之處設置突出的樹脂滯留部，並且在將澆口中央部起至熔接部為止的成形品體積設為V，將前述V之中自熔接部至前述樹脂滯留部之注入口中央部為止的成形品體積設為Vo ，將前述樹脂滯留部的體積設為Vd 之場合，讓前述樹脂滯留部配置成能符合下述公式(Ⅱ)的射出成形品之製造方法。(2) A method for producing an injection-molded article, wherein at least one of the branching passages before the molten resin is flowed to form a welded portion in a cavity of the mold to be used, and is welded to the outside of the welded portion The portion of the molded article from the center portion of the gate to the welded portion is set to V, and the portion of the V from the self-welding portion to the center of the injection port of the resin retention portion is provided. molded article to a volume V o, the volume of the resin case retention portion to V d, the resin so that the retention portion is configured to satisfy the following equation can manufacturing method (ⅱ) of the injection molded product.
(Vd /V)>-35.6(Vo /V)3 ＋27.0(Vo /V)2 -6.56(Vo /V)＋0.66 …(Ⅱ)(V d /V)>-35.6(V o /V) 3 +27.0(V o /V) 2 -6.56(V o /V)+0.66 (II)
(3)當前述(Vo /V)之值為0.10以上0.17以下時，在(1)或是(2)中所記載的射出成形品之製造方法。(3) When the value of (V o /V) is 0.10 or more and 0.17 or less, the method for producing an injection molded article described in (1) or (2).
(4)當前述(Vd /V)之值為0.10以上0.25以下時，在(1)至(3)中任何一項所記載的射出成形品之製造方法。A method of manufacturing a molded article (4) of said current (V d / V) value of 0.25 or less than 0.10, in (1) to (3) in any one of claims emitted.
(5)以液晶聚合物作為射出樹脂，當前述射出成形品的厚度未達1mm時，在(1)至(4)中任何一項所記載的射出成形品之製造方法。(5) A method of producing an injection molded article according to any one of (1) to (4), wherein the liquid crystal polymer is used as the injection resin, and the thickness of the injection molded article is less than 1 mm.
利用本發明的射出成形品之製造方法，在所使用模具之模穴內，位於由複數處熔融樹脂流合流而形成熔接部之前的至少一處分流路上，於前述熔接部之外而靠近熔接部之位置設置突出的樹脂滯留部之方式，就可以針對所期望的熔接強度之改善程度、而近乎確切的在所使用模具上設定出最佳的樹脂滯留部位置、樹脂滯留部體積。According to the method for producing an injection-molded article of the present invention, at least one of the branching passages before the molten resin is flowed to form a welded portion in the cavity of the mold to be used, and the welded portion is outside the welded portion. By providing a protruding resin retention portion at a position, it is possible to set an optimum resin retention portion position and a resin retention portion volume on the mold to be used, with respect to the degree of improvement of the desired weld strength.
利用本發明，即使是對於未達1mm之極薄型射出成形品亦可以充分的改善其熔接強度。According to the present invention, the weld strength can be sufficiently improved even for an extremely thin injection molded article of less than 1 mm.
以下係針對本發明之一種實施例來加以詳細的說明，但本發明不應受以下實施例的限制，只要是在本發明之目的的範圍內，可以適當的追加相關的變更而實施本發明。The present invention is not limited by the following examples, but the present invention is not limited by the following examples, and the present invention can be carried out by appropriately adding the relevant modifications within the scope of the object of the present invention.
本發明係關於一種射出成形品之製造方法，其特徵為在其所使用模具之模穴內，位於由複數處熔融樹脂流合流而形成熔接部之前的至少一處分流路上，於該熔接部之外而靠近熔接部之處設置突出的特定樹脂滯留部。The present invention relates to a method for producing an injection-molded article, characterized in that in a cavity of a mold to be used, at least one branching path before a flow of molten resin is formed by a plurality of molten resin to form a welded portion, and the welded portion is Outside, the protruding specific resin retention portion is provided near the welded portion.
在本發明相關射出成形品之製造方法所使用的模具中，是如上所述的保有樹脂滯留部。如果未作出樹脂滯留部時，在熔接部中樹脂係被配向成與流動方向形成呈垂直的角度，故會因樹脂間交互糾纏等之相互作用較少，而造成該部分強度低下之現象。在本發明中可經由樹脂流入樹脂滯留部之方式，即使在熔接部亦會讓樹脂產生樹脂流動方向的配向，而得以改善熔接部之強度。此外在樹脂滯留部之附近會呈現與樹脂流動方向呈垂直的角度的配向，亦即產生朝向樹脂滯留部之注入口方向的配向，由於樹脂滯留部係設置於熔接部之外而靠近熔接部之處，故可擾亂熔接部中樹脂之配向，而得以增強樹脂間之相互作用、防止熔接部之強度低下。In the mold used in the method for producing an injection molded article according to the present invention, the resin retaining portion is as described above. If the resin retention portion is not provided, the resin is oriented at a perpendicular angle to the flow direction in the welded portion, so that the interaction between the resin is less entangled, and the strength of the portion is lowered. In the present invention, the resin can flow into the resin retaining portion via the resin, and even in the welded portion, the resin can be aligned in the flow direction of the resin, and the strength of the welded portion can be improved. Further, in the vicinity of the resin retention portion, an alignment perpendicular to the resin flow direction is exhibited, that is, an alignment direction toward the injection port of the resin retention portion is generated, and the resin retention portion is provided outside the fusion portion and close to the fusion portion. Therefore, the alignment of the resin in the welded portion can be disturbed, and the interaction between the resins can be enhanced to prevent the strength of the welded portion from being lowered.
製造本發明相關射出成形品所使用的模具其特徵為，在將自澆口中央部起至熔接部為止的成形品體積設為V，將V之中自熔接部至上述樹脂滯留部之注入口中央部為止的成形品體積設為Vo ，及上述樹脂滯留部的體積設為Vd 之場合，樹脂滯留部係被配置成能符合下述公式(Ⅰ)。公式(Ⅰ)可以表示成，熔接部之彎曲強度達到其它部分之彎曲強度的40%以上的領域。還有在產生熔接部而造成彎曲強度之低下後，將殘餘彎曲強度的程度以保持率來表示，即採用以(熔接部之彎曲強度/其它部分之彎曲強度)×100%所得之值。例如：在下述公式(Ⅰ)之場合是表示保持率為40%以上的領域。The mold used for producing the injection-molded article according to the present invention is characterized in that the volume of the molded article from the center portion of the gate to the welded portion is V, and the injection port from the self-welding portion to the resin retention portion is V. When the volume of the molded article at the center portion is V o and the volume of the resin retaining portion is V d , the resin retaining portion is disposed so as to conform to the following formula (I). Formula (I) can be expressed as a field in which the bending strength of the welded portion reaches 40% or more of the bending strength of the other portion. Further, after the weld portion is produced to cause the bending strength to be lowered, the degree of the residual bending strength is expressed by the retention ratio, that is, the value obtained by (the bending strength of the welded portion/the bending strength of the other portion) × 100%. For example, in the case of the following formula (I), it is a field indicating that the retention ratio is 40% or more.
(Vd /V)＞-71.4(Vo /V)3 ＋47.8(Vo /V)2 -10.0(Vo /V)＋0.78 …(Ⅰ)(V d /V)>-71.4(V o /V) 3 +47.8(V o /V) 2 -10.0(V o /V)+0.78 (I)
利用在模具中設置符合上述公式之樹脂滯留部的方式，可確保熔接部之彎曲強度達到其它部分之彎曲強度的40%以上。本發明除了能如此大幅的改善熔接部之強度外，同時亦可以針對所期望的改善程度，而近乎確切的來設定使用模具中之最佳樹脂滯留部位置及樹脂滯留部體積。By providing a resin retaining portion conforming to the above formula in the mold, it is possible to ensure that the bending strength of the welded portion reaches 40% or more of the bending strength of the other portion. In addition to being able to greatly improve the strength of the welded portion, the present invention can also set the optimum resin retention portion position and the resin retention portion volume in the used mold in a nearly exact manner for the desired degree of improvement.
熔接部彎曲強度之測定方法是如後所述，並且採用以該方法測定所得之彎曲強度值。The method of measuring the bending strength of the welded portion is as described later, and the obtained bending strength value measured by this method is employed.
此外當所使用之模具中樹脂滯留部位置被配置成符合下述公式(Ⅱ)時，則所製造出之射出成形品其熔接部之彎曲強度能達到其它部分之彎曲強度的50%以上。由於能進一步改善熔接部之強度，故為一理想的方法。與上述公式(Ⅰ)之場合同樣的，公式(Ⅱ)可以表示熔接部之彎曲強度達到其它部分之彎曲強度的50%以上的領域。Further, when the position of the resin retention portion in the mold to be used is arranged to conform to the following formula (II), the bending strength of the welded portion of the injection molded article produced can reach 50% or more of the bending strength of the other portion. Since the strength of the welded portion can be further improved, it is an ideal method. Similarly to the case of the above formula (I), the formula (II) can indicate a field in which the bending strength of the welded portion reaches 50% or more of the bending strength of the other portion.
(Vd /V)＞-35.6(Vo /V)3 +27.0(Vo /V)2 -6.56(Vo /V)+0.66 …(H)(V d /V)>-35.6(V o /V) 3 +27.0(V o /V) 2 -6.56(V o /V)+0.66 ...(H)
經由上述公式，就可以針對所期望達到的熔接部彎曲強度，而輕易的來設定樹脂滯留部之位置、樹脂滯留部之體積。且又可以如後所述的，經由將樹脂滯留部之位置、體積予以最佳化之方式，而抑制額外不需要的樹脂消耗量，並獲得所期望的熔接部強度改善之效果。According to the above formula, the position of the resin retention portion and the volume of the resin retention portion can be easily set for the desired bending strength of the welded portion. Further, as will be described later, by optimizing the position and volume of the resin retention portion, it is possible to suppress an excessive amount of unnecessary resin consumption and obtain an effect of improving the strength of the welded portion.
在本發明相關射出成形品之製造方法中，Vo /V之範圍通常可視其所期望的射出成形品之熔接強度改善程度，而適當的予以變更。例如、在成形品之熔接部強度的保持率必須達到40%以上之場合，只要符合上述公式(Ⅰ)，則製造者可以自由的設定樹脂滯留部之位置、樹脂滯留部之體積。就以此而言，Vo /V之範圍是以0.10以上0.17以下為佳。雖然是如眾所周知的，相較於射出成形品之體積如果樹脂滯留部之體積愈大之時，則樹脂的移動量愈多愈容易擾亂樹脂配向，而熔接部之強度亦愈容易改善，但如參照第4、5圖則可明白的看出，當Vo /V是位於上述範圍時，可以在抑制樹脂滯留部體積的同時，又達成高熔接部強度改善之效果。此外由第5圖而明白的看出，如欲達成40%以上的保持率時，Vo /V之範圍應是在0.065以上。同樣的、由第5圖可得知，能達成50%以上的保持率之Vo /V範圍應是在0.085以上。此外還可由第4、5圖可明白的看出，當Vo /V之範圍是在上述之0.10以上0.17以下時，因保持率達到40%以上、50%以上的領域寬廣，能達成40%以上、50%以上保持率的可能性高而甚為理想。In the method for producing an injection-molded article according to the present invention, the range of V o /V can be appropriately changed depending on the degree of improvement of the fusion strength of the injection molded article desired. For example, when the retention ratio of the strength of the welded portion of the molded article must be 40% or more, the manufacturer can freely set the position of the resin retention portion and the volume of the resin retention portion as long as the formula (I) is satisfied. In this regard, the range of V o /V is preferably 0.10 or more and 0.17 or less. Although it is well known that the larger the volume of the resin retention portion is compared to the volume of the injection molded article, the more the amount of movement of the resin is, the more likely the resin orientation is disturbed, and the strength of the welded portion is more easily improved, but As can be clearly seen from Figs. 4 and 5, when V o /V is in the above range, the effect of improving the strength of the high-welded portion can be achieved while suppressing the volume of the resin retention portion. Further, as apparent from Fig. 5, if a retention ratio of 40% or more is desired, the range of V o /V should be 0.065 or more. Similarly, as can be seen from Fig. 5, the V o /V range in which the retention ratio of 50% or more can be achieved is 0.085 or more. In addition, as can be clearly seen from the fourth and fifth graphs, when the range of V o /V is 0.10 or more and 0.17 or less, the maintenance rate is 40% or more and 50% or more, and 40% can be achieved. The above, more than 50% retention rate is highly likely and ideal.
在本發明相關射出成形品之製造方法中，Vd /V之範圍通常雖可視其所期望之熔接強度的改善程度，而適當的予以變更，但以0.10以上0.25以下為佳。又雖然相較於射出成形品之體積，當樹脂滯留部之體積愈大之時，則會如上所述的愈容易改善熔接部之強度，但如樹脂滯留部之體積較大時，會額外消耗較多的樹脂，而產生不利的費用增加。In the method for producing an injection-molded article according to the present invention, the range of V d /V is usually appropriately changed depending on the degree of improvement of the desired weld strength, but it is preferably 0.10 or more and 0.25 or less. Further, although the volume of the resin retaining portion is larger as compared with the volume of the injection molded article, the strength of the welded portion is more easily improved as described above, but if the volume of the resin retaining portion is large, additional consumption is caused. More resin, resulting in an unfavorable cost increase.
當Vo /V之範圍是在0.10以上0.15以下，而Vd /V之範圍是在0.10以上0.25以下時，因能得到非常高的熔接部強度改善之效果，而且可抑制額外不需要的樹脂消耗量，故甚為理想。When the range of V o /V is 0.10 or more and 0.15 or less, and the range of V d /V is 0.10 or more and 0.25 or less, the effect of improving the strength of the welded portion can be obtained, and the additional unnecessary resin can be suppressed. The consumption is very ideal.
雖然樹脂滯留部之設置位置是根據與樹脂滯留部間之體積的關係而決定，但當自熔接部起算至樹脂滯留部之距離太長時，藉由樹脂滯留部來擾亂樹脂配向的效果就會因距離關係而難以影響至熔接部，就會產生必須將樹脂滯留部體積作成非常大的不利現象。又當自熔接部起算至樹脂滯留部之距離太短時，亦即Vo /V是小於0.065之時，則沿著熔接部之樹脂流動會受到擾亂，而難以產生與熔接部呈垂直方向之配向故亦為不佳。又所謂「樹脂滯留部之距離」是指自樹脂滯留部之注入口中央部至熔接部為止的距離。Although the position of the resin retention portion is determined according to the relationship with the volume between the resin retention portions, when the distance from the fusion portion to the resin retention portion is too long, the effect of the resin alignment is disturbed by the resin retention portion. It is difficult to influence the welded portion due to the distance relationship, and it is disadvantageous that the volume of the resin retaining portion must be made very large. Further, when the distance from the fusion joint to the resin retention portion is too short, that is, when V o /V is less than 0.065, the flow of the resin along the welded portion is disturbed, and it is difficult to form a direction perpendicular to the welded portion. The alignment is also not good. The term "distance of the resin retention portion" means the distance from the center portion of the injection port of the resin retention portion to the welded portion.
在本發明所使用之模具中，亦可以設置複數個樹脂滯留部。在設置複數個樹脂滯留部之時，雖然能夠設置於兩處的分流樹脂路而進行複雜的樹脂之壓入，但儘可能的仍是以在一處的分流回路上並沿著熔接部來設置為佳。In the mold used in the present invention, a plurality of resin retention portions may be provided. When a plurality of resin retention portions are provided, it is possible to provide a complicated resin press-in at a split resin path provided at two places, but it is still provided as a separate flow circuit and along the welded portion. It is better.
對於連結模具及樹脂滯留部之注入口的厚度雖然無特別的限制，但注入口的厚度是在能讓樹脂保持流動的範圍內，以較薄者為佳。緊縮注入口的厚度時，會在樹脂滯留部內部之壓力與模穴內之壓力間產生較大的壓力差，讓樹脂更容易流入，而較易在熔接部產生樹脂流動方向的配向，然後又會在樹脂滯留部之附近擾亂樹脂的配向，加強樹脂間的相互作用，來達成提高熔接強度改善的效果。The thickness of the injection port for connecting the mold and the resin retention portion is not particularly limited, but the thickness of the injection port is preferably within a range in which the resin can be kept flowing, and is preferably thinner. When the thickness of the injection port is tightened, a large pressure difference is generated between the pressure inside the resin retention portion and the pressure in the cavity, so that the resin can flow more easily, and the alignment of the resin flow direction is more likely to occur in the welded portion, and then The alignment of the resin is disturbed in the vicinity of the resin retention portion, and the interaction between the resins is enhanced to achieve an effect of improving the weld strength.
如上所述本發明所使用之模具，可以適用於眾所周知的各種熱可塑性樹脂之射出成形，尤其是對於利用習知之成形方法會造成在熔接部的強度急劇低下之物品具有特別的效果。例如：結晶性樹脂、特別是在如利用習知方法進行液晶性聚合物之成形時，在包挾著熔接部之兩側分子是沿著熔接部而配向，故會在熔接部產生較其它部位明顯較低的強度，但如採用本發明之成形方法及模具時，會因為在熔接部之配向能有效率的受到擾亂，而可以充分的改善強度。此外在使用無機充填劑、特別是使用纖維狀充填劑之熱可塑性樹脂之時，無機充填劑、特別是纖維狀充填劑會沿著熔接部而配向故容易產生同樣的問題，而本發明之成形方法及模具，對於該等樹脂組成物之成形亦極為有效。The mold used in the present invention as described above can be applied to the injection molding of various known thermoplastic resins, and in particular, it has a particular effect on articles having a sharply lowered strength in the welded portion by the conventional molding method. For example, a crystalline resin, in particular, when a liquid crystalline polymer is formed by a conventional method, molecules on both sides of the welded portion are aligned along the welded portion, so that other portions are formed in the welded portion. Significantly lower strength, but when the forming method and the mold of the present invention are used, the strength can be sufficiently improved because the alignment of the welded portion can be efficiently disturbed. Further, when an inorganic filler, particularly a thermoplastic resin using a fibrous filler, is used, the inorganic filler, particularly the fibrous filler, tends to align along the welded portion, so that the same problem is easily caused, and the present invention is formed. The method and the mold are also extremely effective for forming such resin compositions.
利用本發明之製造方法所能製造出之射出成形品的形狀等並未特別受到限制，本發明之製造方法可以適用於各種形狀之射出成形品的成形。The shape and the like of the injection molded article which can be produced by the production method of the present invention are not particularly limited, and the production method of the present invention can be applied to the formation of injection molded articles of various shapes.
以上述專利文獻1中所記載之方法等，在射出成形品之厚度是極薄之場合就無法得到改善熔接強度的效果，但如利用本發明的射出成形品之製造方法時，即使是不到1mm厚度之薄型射出成形品，亦可以改善其熔接強度。並更進一步可以改善不到0.5mm厚度之射出成形品的熔接強度。而本發明之特徵之一，就是此種即便是薄型射出成形品亦可以達成熔接強度之改善。In the method described in the above Patent Document 1, when the thickness of the injection molded article is extremely thin, the effect of improving the welding strength cannot be obtained. However, even when the method for producing the injection molded article of the present invention is used, A thin injection molded article having a thickness of 1 mm can also improve the weld strength. Further, it is possible to improve the welding strength of the injection molded article having a thickness of less than 0.5 mm. One of the features of the present invention is that such a weld strength can be improved even in the case of a thin injection molded article.
利用本發明之製造方法所獲得的射出成形品，可以讓熔接部的強度大幅改善。相較於未設置樹脂滯留部之場合，使用本發明之時可以達成3倍以上的熔接強度之改善。又可能進一步再經由樹脂滯留部的位置、體積等的設定，而達成4倍以上的熔接強度之改善。According to the injection molded article obtained by the production method of the present invention, the strength of the welded portion can be greatly improved. When the resin retention portion is not provided, the improvement of the fusion strength of three times or more can be achieved by using the present invention. Further, it is possible to further improve the welding strength by four times or more by setting the position, the volume, and the like of the resin retention portion.
本發明之製造方法，雖然是如上所述的可以適用於使用各種樹脂之射出成形品的製造，但特別是適用於強度較弱，在嵌合時易產生破裂等問題之薄肉連接器(Connecter)等的精密成形品上為佳。此外在如上所述之使用液晶性聚合物的薄肉連接器上，亦可以達成熔接強度之改善，故可以良好的適用本發明之製造方法。The production method of the present invention is applicable to the production of an injection molded article using various resins as described above, but is particularly suitable for a thin meat connector (Connecter) which is weak in strength and which is liable to cause cracking during fitting. Such as precision molded products are preferred. Further, in the thin meat connector using the liquid crystalline polymer as described above, the improvement in the welding strength can be achieved, so that the production method of the present invention can be suitably applied.
本發明的射出成形品之製造方法中，如果是採用如上所述之配備著樹脂滯留部的模具時，並不會對樹脂之固化速度、成形品容量，及樹脂溫度、模具溫度、射出壓力等之成形條件等產生特別的限制。In the method for producing an injection molded article of the present invention, when the mold having the resin retention portion as described above is used, the curing speed of the resin, the molded product capacity, and the resin temperature, the mold temperature, the injection pressure, and the like are not obtained. The molding conditions and the like are particularly limited.
以下就透過具體的實施例來針對本發明再予以詳細的說明，但本發明並不受限於該等實施例之限制。The present invention will be further described in detail by way of specific examples, but the invention is not limited by the examples.
〈材料〉<material>
液晶性樹脂(Polyplastic公司產品「Vectra E 130i」)Liquid crystalline resin (Polyplastic product "Vectra E 130i")
〈成形方法〉<Forming method>
下述評鑑例中之射出成形品，是利用第1圖中所示之模具、成形機(Sodick Plustech公司製造之「TR100EH」)，並按照以下的條件進行成形。所獲致之成形品的尺寸為50mm×5mm×(下述表中顯示之厚度)。又在變更成形品之厚度時，是以更換第1圖中所示之「產品‧流道」的方式，在變更樹脂滯留部之位置時，是以更換第1圖中所示之「樹脂滯留部」的方式，在變更樹脂滯留部之體積時，是以更換該當部之頂出銷(Eject Pin)的長度，而變更樹脂滯留部深度的方式來進行。此外關於熔接部之位置，則是經由未作出樹脂滯留部之模具而取得射出成形品後，來加以確認。The injection-molded article in the following evaluation example was molded by the mold and the molding machine ("TR100EH" manufactured by Sodick Plustech Co., Ltd.) shown in Fig. 1 under the following conditions. The size of the obtained molded article was 50 mm × 5 mm × (thickness shown in the following table). When the thickness of the molded article is changed, the "product ‧ flow path" shown in Fig. 1 is replaced, and when the position of the resin retention portion is changed, the resin retention shown in Fig. 1 is replaced. In the method of changing the volume of the resin retention portion, the length of the ejection pin (Eject Pin) of the portion is changed, and the depth of the resin retention portion is changed. In addition, the position of the welded portion is confirmed after the injection molded article is obtained through the mold in which the resin retaining portion is not formed.
〈成形條件〉<forming conditions>
成形溫度：350℃Forming temperature: 350 ° C
射出速度：100mm/secInjection speed: 100mm/sec
模具溫度：70℃Mold temperature: 70 ° C
週期時間：14秒Cycle time: 14 seconds
樹脂滯留部之位置與Vo /V間的關係，及樹脂滯留部之深度與Vd /V間的關係，分別顯示於表1、表2中。The relationship between the position of the resin retention portion and V o /V, and the relationship between the depth of the resin retention portion and V d /V are shown in Tables 1 and 2, respectively.
〈實施例1〉<Example 1>
利用表3中所示的模具，製造出實施例及比較例之射出成形品。並利用以下所示的方法測定出彎曲強度。測定結果顯示於表3中。The injection molded articles of the examples and the comparative examples were produced using the molds shown in Table 3. The bending strength was measured by the method shown below. The measurement results are shown in Table 3.
[彎曲強度之測定][Measurement of bending strength]
利用第2圖中所示之彎曲試驗機(ORIENTEC公司製造「TENSILON RTA-250」)：試驗速度為1mm/min、跨距(Span)為20mm、支點R為2.0mm，並採用第3圖中所示之荷重治具(第3圖中所記載之尺寸是使用分釐卡尺(Micrometer)測定所得，單位為mm)，來針對實施例及比較例試驗片中的熔接部彎曲強度，及熔接部以外部分之彎曲強度加以測定。然後再經由上述之記算方法算出保持率。彎曲強度、保持率則是顯示於表3中。Using the bending tester shown in Fig. 2 ("TENSILON RTA-250" manufactured by ORIENTEC): the test speed was 1 mm/min, the span (Span) was 20 mm, and the fulcrum R was 2.0 mm, and the figure 3 was used. The load fixture shown in the figure (the size shown in Fig. 3 is measured by using a caliper (micrometer), and the unit is mm), and the bending strength of the welded portion in the test piece of the example and the comparative example, and the welded portion The bending strength of the outer portion was measured. Then, the retention ratio is calculated by the above-described calculation method. The bending strength and retention ratio are shown in Table 3.
於表3中為了能清楚明瞭，是在特定位置設置具有特定體積之樹脂滯留部，並確認已獲得提高熔接部強度之改善效果。此外並也確認了改善前(比較例)之保持率及改善後(實施例)之保持率，幾乎不受成形品厚度的影響。In Table 3, in order to make it clear, a resin retention portion having a specific volume is provided at a specific position, and it has been confirmed that an improvement effect of improving the strength of the welded portion is obtained. Further, it was confirmed that the retention ratio before the improvement (Comparative Example) and the retention ratio after the improvement (Example) were hardly affected by the thickness of the molded article.
〈實施例2〉<Example 2>
利用表4中所示之各種不同Vo /V、Vd /V的模具，經由測定熔接部之彎曲強度，而計算出彎曲強度之保持率。保持率則是顯示於表4中。又第4圖是以橫軸為Vo /V、縱軸為Vd /V之方式而以圖形表示。記載於點繪(Plot)部分之數字為保持率。然後再將其連結後以圖形顯示保持率為40%以上，及保持率為50%以上的回歸曲線。Using the molds of various V o /V and V d /V shown in Table 4, the bending strength of the welded portion was measured to calculate the retention of the bending strength. The retention rate is shown in Table 4. Further, Fig. 4 is a graph in which the horizontal axis is V o /V and the vertical axis is V d /V. The number recorded in the Plot section is the retention rate. Then, after connecting them, the graph shows that the retention ratio is 40% or more and the retention ratio is 50% or more.
經由將表4予以圖形化而轉換成第4圖後，就清楚的顯示了保持率為40%以上領域的近似曲線，及顯示了保持率為50%以上的的近似曲線。還有圖形中之數字為保持率。By converting Table 4 into a fourth figure, an approximate curve in the field of retention of 40% or more and an approximate curve showing a retention ratio of 50% or more were clearly shown. Also the number in the graph is the retention rate.
第5圖是以表4中所示之數據為基礎，並顯示了利用UMETRICS公司生產之解析軟體「MODDE6」所計算求得保持率在10%以上、20%以上、30%以上、40%以上、50%以上、60%以上、70%以上、80%以上、90%以上的領域。圖形中顯示之數字為保持率，而位在各實線上方之領域，是表示在該領域中之保持率較實線所顯示之保持率還高。Figure 5 is based on the data shown in Table 4, and shows that the retention rate calculated by UMETRICS's analytical software "MODDE6" is 10% or more, 20% or more, 30% or more, 40% or more. , 50% or more, 60% or more, 70% or more, 80% or more, 90% or more. The number shown in the graph is the retention rate, and the field above the solid line indicates that the retention rate in the field is higher than that shown by the solid line.
本發明是以第4圖所顯示之回歸曲線來界定。在該第4圖中所顯示的，代表保持率為40%以上之回歸曲線及代表保持率為50%以上之回歸曲線，與第5圖中所顯示的，代表保持率為40%以上之回歸曲線及代表保持率為50%以上之回歸曲線，嚴密的說並不相同，但如以第4、5圖中所顯示的範圍而言，是對等的。The invention is defined by the regression curve shown in Figure 4. In the fourth graph, a regression curve representing a retention ratio of 40% or more and a regression curve representing a retention ratio of 50% or more are shown, and the regression shown in Fig. 5 represents a retention ratio of 40% or more. The curve and the regression curve representing a retention rate of 50% or more are not strictly the same, but are equivalent if they are in the range shown in Figures 4 and 5.
從回歸曲線就可以清楚的加以確認，當Vo /V位於0.1到0.17之範圍內時，可以一方面抑制樹脂滯留部的體積同時又改善了熔接強度。並又可確認當樹脂滯留部的體積愈大時，就具有愈高的熔接強度改善效果。It can be clearly confirmed from the regression curve that when V o /V is in the range of 0.1 to 0.17, the volume of the resin retention portion can be suppressed while the welding strength is improved. Further, it was confirmed that the higher the volume of the resin retention portion, the higher the weld strength improvement effect.
使用表5所顯示的具有不同厚度之注入口的模具，並製造出射出成形品。然後將各成形品之彎曲強度的保持率顯示於表5中。A mold having injection ports having different thicknesses as shown in Table 5 was used, and an injection molded article was produced. Then, the retention ratio of the bending strength of each molded article is shown in Table 5.
由表5之結果就可以清楚的加以確認，當注入口的厚度愈薄時，就具有愈大的熔接強度改善效果。From the results of Table 5, it can be clearly confirmed that the thinner the thickness of the injection port, the greater the weld strength improvement effect.
101‧‧‧可動側101‧‧‧ movable side
102‧‧‧固定側102‧‧‧ fixed side
103‧‧‧流道103‧‧‧ flow path
104‧‧‧澆口104‧‧‧gate
105‧‧‧注入口105‧‧‧Injection
106‧‧‧製品106‧‧‧Products
107‧‧‧樹脂滯留部107‧‧‧Resin retention department
108‧‧‧頂出銷108‧‧‧Top sales
109‧‧‧樹脂滯留部深度109‧‧‧Resin retention depth
201‧‧‧試驗片201‧‧‧ test piece
202‧‧‧荷重點202‧‧‧
203‧‧‧支點203‧‧‧ fulcrum
204‧‧‧跨距204‧‧‧Span
301‧‧‧荷重治具301‧‧‧Loading fixture
第1圖係實施本發明時所使用模具之圖式，(a)為正面圖、(b)為A-A線剖面示意圖。Fig. 1 is a view showing a mold used in the practice of the present invention, wherein (a) is a front view and (b) is a cross-sectional view taken along line A-A.
第2圖係評鑑成形品強度時使用的彎曲試驗機。Figure 2 is a bending tester used to evaluate the strength of a molded article.
第3圖係評鑑成形品強度時使用的荷重治具。Figure 3 is a load fixture used to evaluate the strength of a molded article.
第4圖係顯示(Vo /V)及(Vd /V)及保持率間相互關係的圖表。Figure 4 is a graph showing the relationship between (V o /V) and (V d /V) and retention.
第5圖係經由計算所得之(Vo /V)及(Vd /V)及保持率間相互關係的圖表。Figure 5 is a graph showing the relationship between (V o /V) and (V d /V) and retention rates.
Claims (5)
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| JP2008156892A JP5442220B2 (en) | 2008-06-16 | 2008-06-16 | Manufacturing method of injection molded products |
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| TWI476091B true TWI476091B (en) | 2015-03-11 |
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| JP (1) | JP5442220B2 (en) |
| KR (1) | KR101536338B1 (en) |
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| JP6846289B2 (en) * | 2017-06-02 | 2021-03-24 | 株式会社ブリヂストン | Manufacturing method for injection molding dies, resin members, and resin products |
| CN112060495A (en) * | 2019-06-11 | 2020-12-11 | 大赛璐塑料株式会社 | Injection molded article and method for producing same |
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|---|---|---|---|---|
| JPH04310715A (en) * | 1991-04-09 | 1992-11-02 | Polyplastics Co | Injection molding method, injection molding die and injection molded product |
| JP2005321101A (en) * | 2005-07-14 | 2005-11-17 | Nsk Ltd | Plastic seal for bearing |
| TWI253978B (en) * | 2002-02-13 | 2006-05-01 | Yazaki Kk | Method of forming fusion insert part in blow molding body |
| JP2007062333A (en) * | 2005-09-02 | 2007-03-15 | Shin Etsu Polymer Co Ltd | Molding die and dicing frame for semiconductor wafer |
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| JP2945147B2 (en) * | 1990-12-28 | 1999-09-06 | 日本石油化学株式会社 | Injection molding method |
| JP2955798B2 (en) * | 1992-04-09 | 1999-10-04 | ポリプラスチックス株式会社 | Injection molding method |
| KR960007275B1 (en) * | 1992-06-05 | 1996-05-30 | 폴리플라스틱스 가부시끼가이샤 | Injection molding process, mold for injection molding, and injection molded article |
| JP2960256B2 (en) * | 1992-06-25 | 1999-10-06 | ポリプラスチックス株式会社 | Injection molding method and injection mold |
| JP2807619B2 (en) * | 1993-10-08 | 1998-10-08 | 株式会社新潟鉄工所 | Resin molding machine |
| AU677903B2 (en) * | 1994-06-01 | 1997-05-08 | Toyota Jidosha Kabushiki Kaisha | Casting method with improved resin core removing step and apparatus for performing the method |
| US5773042A (en) * | 1994-10-14 | 1998-06-30 | Kabushiki Kaisha Kobe Seiko Sho | Injection molding unit for long fiber-reinforced thermoplastic resin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04310715A (en) * | 1991-04-09 | 1992-11-02 | Polyplastics Co | Injection molding method, injection molding die and injection molded product |
| TWI253978B (en) * | 2002-02-13 | 2006-05-01 | Yazaki Kk | Method of forming fusion insert part in blow molding body |
| JP2005321101A (en) * | 2005-07-14 | 2005-11-17 | Nsk Ltd | Plastic seal for bearing |
| JP2007062333A (en) * | 2005-09-02 | 2007-03-15 | Shin Etsu Polymer Co Ltd | Molding die and dicing frame for semiconductor wafer |
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| KR101536338B1 (en) | 2015-07-13 |
| TW201008752A (en) | 2010-03-01 |
| CN102066079A (en) | 2011-05-18 |
| JP5442220B2 (en) | 2014-03-12 |
| CN102066079B (en) | 2014-06-11 |
| WO2009154078A1 (en) | 2009-12-23 |
| KR20110038649A (en) | 2011-04-14 |
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