KR0133339Y1 - Apparatus for preventing flash of boss in injection moulding - Google Patents
Apparatus for preventing flash of boss in injection moulding Download PDFInfo
- Publication number
- KR0133339Y1 KR0133339Y1 KR2019930001288U KR930001288U KR0133339Y1 KR 0133339 Y1 KR0133339 Y1 KR 0133339Y1 KR 2019930001288 U KR2019930001288 U KR 2019930001288U KR 930001288 U KR930001288 U KR 930001288U KR 0133339 Y1 KR0133339 Y1 KR 0133339Y1
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- South Korea
- Prior art keywords
- boss
- sleeve
- injection molding
- core
- plate
- Prior art date
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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
- B29C45/0025—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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
본 고안은 사출성형 보스의 플래쉬 방지장치에 관한 것으로, 나사의 체결시 사용되는 보스(31)를 사출성형하며, 사출성형된 보스사출물을 상향 이탈시키는 슬리브(22)를 갖는 보스성형사출기에 있어서, 상기 슬리브(22)의 상단면에 구비되며 액상 수지재의 경화시 액상 수지재가 스며들어 경화되는 것을 방지하며 상향할수록 내향 경사진 환형돌기(22a)를 일체로 구성하므로서 각종 전자제품에서 나사의 체결시 사용되는 보스의 사출성형시 플래쉬가 성형됨을 방지하는 것이다.The present invention relates to a flash prevention device of the injection molding boss, in the injection molding boss 31 used when tightening the screw, boss injection molding machine having a sleeve 22 for releasing the injection molded boss injection upward, It is provided on the upper surface of the sleeve 22 and prevents the liquid resin material from infiltrating and hardening when the liquid resin material is cured. It is to prevent the molding of the flash when the injection molding of the boss.
Description
제1도는 종래 사출성형 보스의 성형상태를 보인 일부단면구성도.1 is a partial cross-sectional view showing a molding state of a conventional injection molding boss.
제2도는 사출성형후 완성된 보스를 보인 단면구성도.2 is a cross-sectional view showing the boss completed after injection molding.
제3도(a)는 본고안에 따른 성형상태를 보인 요부단면구성도.Figure 3 (a) is a sectional view showing the main portion showing the molding state according to the present proposal.
제3도(b)는 제3도a의 가부분 확대도.FIG. 3B is an enlarged partial view of FIG. 3A.
제3도(c)는 제3도a의 나부분 확대도.FIG. 3 (c) is an enlarged view of a portion of FIG. 3a.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 고정측코아 20 : 가동측코아10: fixed side core 20: movable side core
21 : 하부판 22 : 슬리브21: lower plate 22: sleeve
22a : 환형돌기 23 : 밑판22a: annular protrusion 23: base plate
24 : 지지판 30 : 사출물24: support plate 30: injection molding
31 : 보스31: boss
본 고안은 사출성형보스의 플래쉬 방지장치에 관한 것으로, 특히 각종 전자제품에서 나사의체결시 사용되는 보스의 사출성형시 플래쉬가 성형됨을 방지하는 사출성형보스의 플래쉬 방지장치에 관한 것이다.The present invention relates to a flash prevention device of the injection molding boss, and more particularly, to a flash prevention device of the injection molding boss to prevent the molding of the flash when the injection molding of the boss used when screwing in various electronic products.
제1도는 종래 사출성형 보스의 성형상태를 보인 일부단면구성도이며, 제2도는 사출성형후 완성된 보스를 보인 단면구성도이다.1 is a partial cross-sectional view showing a molding state of a conventional injection molding boss, and FIG. 2 is a cross-sectional view showing a completed boss after injection molding.
도시와 같이 종래의 보스성형 사출기는, 상측에 고정측코아(10)가 구비되며, 상기 고정측코아(10)하측에는 소정간격 이격되게 설치되며 하측에 하부판(21)이 구비된 가동측코아(20)와, 상기 가동측코아(20)의 중앙부까지 연통되며 내부중앙이 연통된 슬리브(22)가 고정되는 한편, 이의 이탈을 방지하며 작동구간(ℓ)만큼 상향 이동시키는 밑판(23)이 하측에 구비된 지지판(24)과, 상기 밑판(23)하측에 설치되며 내부에 상기 가동측코아(20)의 상측까지 연통되며 사측에 테이퍼면을 갖는 슬리브코아핀(25)이 슬리브(22)의 내부중앙에 고정설치된 가동측고정판(26)으로 구성된다.As shown in the drawing, the conventional boss molding injection machine has a fixed side core 10 provided on an upper side thereof, a movable side core provided below the fixed side core 10 at a predetermined interval, and provided with a lower plate 21 at a lower side thereof. 20) and the sleeve 22 communicating with the center of the movable side core 20 and communicating with the inner center thereof are fixed, while the base plate 23 which prevents its detachment and moves upward by the operating section l is lowered. The sleeve core pin 25 is installed on the support plate 24 and the bottom plate 23 and provided in communication with the upper side of the movable side core 20 and having a tapered surface on the four sides of the sleeve 22. It consists of a movable side fixing plate 26 fixed to the inner center.
이와같이 구성된 종래 사출성형 보스에서 보스성형과정을 살펴보면, 최초 도시되지 않은 통로를 통하여 액상의 수지재가 점차 유입되며 상기 고정측코아(10)와 가동측코아(20)사이를 경유, 슬리브(22)와 상기 슬리브(22)의 상단까지 돌출된 슬리브코아핀(25)사이까지 점차 충진 경화된다.Looking at the boss molding process in the conventional injection molding boss configured as described above, the liquid resin material is gradually introduced through the passage (not shown) first, and between the fixed side core (10) and the movable side core (20), the sleeve (22) and It gradually fills and hardens between the sleeve core pins 25 protruding to the upper end of the sleeve 22.
상기 액상의 수지재가 충진 경화되면 상기 슬리브코아핀(25)에 끼워진 상태의 슬리브(22)를 고정하는 지지판(24)하측의 밑판(23)이 일정구간만큼 상향 이동되며 충진경화된 사출물(30)을 상향 이탈시켜 완성된 보스(31)를 얻는 것이다.When the liquid resin material is filled and cured, the bottom plate 23 under the support plate 24 fixing the sleeve 22 in the state of being inserted into the sleeve core pin 25 is moved upward by a predetermined period, and the filling-hardened injection molding 30 is To escape the upwards to obtain a completed boss (31).
도면중 미설명 부호 31a은 보스에 구비되는 나사공이다.In the figure, reference numeral 31a denotes a screw hole provided in the boss.
그러나 이와같이 구성된 종래의 성형보스에는 다음과 같은 문제점이 지적된다.However, the following problems are pointed out in the conventional molding boss configured as described above.
즉, 슬리브코아핀(25)의 테이퍼면 하단까지 위치되는 슬리브(22)의 상단면이 평탄하므로 최초 액상의 수지재가 충진시 슬리브코아핀(25)의 테이퍼면을 따라 내측으로 스며들며 경화되므로 경화된 보스(31)의 나사공에 박판의 플래쉬가 성형되었다. 따라서 보스의 제품불량 요인이 되었으며 나사결합시에는 이 플래쉬에 의한 클랙이 유발되었다.That is, the top surface of the sleeve 22 positioned to the bottom of the tapered surface of the sleeve core pin 25 is flat, so that when the initial liquid resin is filled, it hardens by penetrating inward along the tapered surface of the sleeve core pin 25. A thin flash was formed in the screw hole of the boss 31. Therefore, it became a bad product of the boss, and the crack caused by this flash when screwing.
본 고안은 상기와같은 종래의 제반 기술결점에 감안한 것으로, 보스의 사출성형시 플래쉬가 성형됨을 방지하여 제품의 신뢰성을 향상 시킬수 있는 사출성형보스의 플래쉬 방지장치를 제공함에 그 목적이 있다.The present invention has been made in view of the above-mentioned general technical shortcomings, and an object thereof is to provide a flash prevention device of an injection molding boss, which can improve the reliability of the product by preventing the flash from being molded during the injection molding of the boss.
상기 목적을 달성하는 본 고안은, 슬리브의 상단면에 상측으로 갈수록 내향경사진 환형돌기를 일체로 형성하므로서 달성되는데, 이하에서 상기 목적을 달성하는 본 고안의 바람직한 실시예를 첨부도면에 의해 상세히 설명한다.The present invention to achieve the above object is achieved by integrally forming an inwardly inclined annular projection toward the upper side of the sleeve, the following detailed description of a preferred embodiment of the present invention to achieve the above object by the accompanying drawings. do.
제3도a는 본 고안에 따른 동작상태를 보인 요부단면 구성도이고, 제3도b는 제3도a의 가부분확대도, 제3도c는 제3도a의 나부분확대도이다.Figure 3a is a main cross-sectional configuration showing the operating state according to the present invention, Figure 3b is a partial enlarged view of Figure 3a, Figure 3c is a partial enlarged view of Figure 3a.
도시와같이, 가동측코아(20)의 상측까지 연통되는 슬리브코아핀(25)을 내부중앙에 갖는 슬리브(22)의 상단면에는 상측으로 갈수록 내향경사진 환형돌기(22a)가 일체로 형성된다.As shown in the figure, an inwardly inclined annular projection 22a is formed integrally on the upper end surface of the sleeve 22 having the sleeve core pin 25 communicating with the upper side of the movable side core 20 at the inner side thereof. .
설명의 편의를 위해 종래와 동일한 부분, 부재에 대해서는 동일부재 번호를 사용하였다.For convenience of description, the same member numbers are used for the same parts and members as in the prior art.
이와같은 본 고안의 전체적인 구성은 상측에 고정측코아(10)가 구비되며, 상기 고정측코아(10)하측에는 소정간격 이격되게 설치되며 하측에 하부판(21)이 구비된 가동측코아(20)와, 상기 가동측코아(20)의 중앙부까지 연통되며 내부중앙이 연통된 슬리브(22)가 고정되는 한편, 이의 이탈을 방지하며 작동구간(ℓ)만큼 상향이동시키는 밑판(23)이 하측에 구비된 지지판(24)과, 상기 밑판(23)하측에 설치되며 내부에 상기 가동측코아(20)의 상측까지 연통되며 상측에 테이퍼면을 갖는 슬리브코아핀(25)이 슬리브(22)의 내부중앙에 고정설치된 가동측고정판(26)으로 구성된 종래의 사출성형 보스를 성형하는 사출기의 기본적인 구성과 대동소이하다. 또한, 종래의 사출성형 보스를 성형하는 사출기에서 보스성형 과정시와 마찬가지로 최초 도시되지 않은 통로를 통하여 액상의 수지재가 점차 유입되며 상기 고정측코아(10)와 가동측코아(20)사이를 경유, 슬리브(22)와 상기 슬리브(22)의 상단까지 돌출된 슬리브코아핀(25)사이까지 점차 충진 경화되며, 상기 충진경화된 사출물은 상기 슬리브코아핀(25)에 끼워진 상태의 슬리브(22)를 고정하는 지지판(24)하측의 밑판(23)이 일정구간만큼 상향 이동되며 경화된 사출물(30)을 상향 이탈시켜 완성된 보스(31)를 얻는 기본동작 역시 종래와 동일하다.The overall configuration of the present invention is provided with a fixed side core 10 on the upper side, the fixed side core 10 is installed below the predetermined interval spaced apart and the lower side 21 is provided with a movable side core (20) And a sleeve 22 communicating with the center of the movable side core 20 and communicating with the inner center thereof is fixed, while a bottom plate 23 is provided on the lower side to prevent the separation thereof and move upward by an operating period (L). The inner support plate 24 and the sleeve core pin 25 which is installed under the bottom plate 23 and communicates with the upper side of the movable side core 20 and has a tapered surface on the upper side thereof. It is similar to the basic configuration of an injection molding machine for molding a conventional injection molding boss composed of a movable side fixing plate 26 fixedly mounted on the same. In addition, in the injection molding machine for molding a conventional injection molding boss, a liquid resin material is gradually introduced through a passage not shown in the first stage as in the case of a boss molding process, and passes between the fixed side core 10 and the movable side core 20, The filling 22 is gradually filled and cured between the sleeve 22 and the sleeve core pin 25 protruding to the upper end of the sleeve 22, and the filling-hardened injection molding inserts the sleeve 22 in the state in which the sleeve core pin 25 is fitted. The base plate 23 below the supporting plate 24 to be fixed is moved upward by a predetermined period, and the basic operation of obtaining the finished boss 31 by leaving the cured injection molding 30 upward is also the same as in the related art.
그러나 본 고안의 지배적인 특징부는, 슬리브(22)의 상단면에 상측으로 갈수록 내향 경사진 환형돌기(22a)가 일체로 형성된다는 점이다.However, the dominant feature of the present invention is that the inwardly inclined annular projection 22a is formed integrally on the upper end surface of the sleeve 22.
따라서 최초 액상인 수지재의 충진시 상기 슬리브(22)의 환형돌기(22a)에 차단되므로, 종래와 같이 슬리브(22)의 상단면이 평탄하므로 액상의 수지재가 슬리브코아핀(25)의 테이퍼면을 따라 내측으로 스며들며 경화되어 그에따른 보스(31)의 나사공에 박판의 플래쉬가 성형되어 제품불량의 요인을 가져왔던 종래의 문제점은 적극적으로 해결된다.(제3도b와 c참조).Therefore, since the upper surface of the sleeve 22 is flat as in the prior art, since the top surface of the sleeve 22 is flat, the liquid resin material is tapered to the tapered surface of the sleeve core pin 25. Accordingly, the conventional problem that the flash of thin plate is formed in the screw hole of the boss 31 soaked inward and hardened accordingly causes the defect of the product is actively solved (see FIGS. 3b and c).
이상과같이 본 고안은, 전자제품에서 나사가 결합되는 보스의 사출성형시 플래쉬가 성형됨을 방지하므로서 제품의 신뢰성이 향상되는 등의 특징이 있다.As described above, the present invention is characterized in that the reliability of the product is improved by preventing the flash from being molded during injection molding of the boss to which the screw is coupled in the electronic product.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930001288U KR0133339Y1 (en) | 1993-02-02 | 1993-02-02 | Apparatus for preventing flash of boss in injection moulding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930001288U KR0133339Y1 (en) | 1993-02-02 | 1993-02-02 | Apparatus for preventing flash of boss in injection moulding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940020392U KR940020392U (en) | 1994-09-15 |
| KR0133339Y1 true KR0133339Y1 (en) | 1999-05-15 |
Family
ID=19350228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019930001288U KR0133339Y1 (en) | 1993-02-02 | 1993-02-02 | Apparatus for preventing flash of boss in injection moulding |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0133339Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100909663B1 (en) * | 2008-03-07 | 2009-07-29 | 주식회사 청석 | Bldc pump equipped with division housing for improving quality at insert moulding |
-
1993
- 1993-02-02 KR KR2019930001288U patent/KR0133339Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100909663B1 (en) * | 2008-03-07 | 2009-07-29 | 주식회사 청석 | Bldc pump equipped with division housing for improving quality at insert moulding |
Also Published As
| Publication number | Publication date |
|---|---|
| KR940020392U (en) | 1994-09-15 |
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