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KR900001940B1 - 연식야구공의 제조방법 - Google Patents

연식야구공의 제조방법 Download PDF

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Publication number
KR900001940B1
KR900001940B1 KR1019860009646A KR860009646A KR900001940B1 KR 900001940 B1 KR900001940 B1 KR 900001940B1 KR 1019860009646 A KR1019860009646 A KR 1019860009646A KR 860009646 A KR860009646 A KR 860009646A KR 900001940 B1 KR900001940 B1 KR 900001940B1
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Prior art keywords
ball
tube
rubber
air
forming method
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Expired
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KR1019860009646A
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KR880006039A (ko
Inventor
송철호
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서울 낫소 주식회사
송철호
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19253394&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR900001940(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 서울 낫소 주식회사, 송철호 filed Critical 서울 낫소 주식회사
Priority to KR1019860009646A priority Critical patent/KR900001940B1/ko
Publication of KR880006039A publication Critical patent/KR880006039A/ko
Priority to US07/253,081 priority patent/US4880233A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00Producing hollow articles
    • B29D22/04Spherical articles, e.g. balls
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B39/00Hollow non-inflatable balls, i.e. having no valves
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B39/00Hollow non-inflatable balls, i.e. having no valves
    • A63B39/06Special coverings
    • A63B39/08Special coverings made of two halves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/004Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore making articles by joining parts moulded in separate cavities, said parts being in said separate cavities during said joining
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/18Baseball, rounders or similar games
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/18Baseball, rounders or similar games
    • A63B2102/182Softball
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00Amusement devices: games
    • Y10S273/20Weighted balls
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Laminated Bodies (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

내용 없음.

Description

연식야구공의 제조방법
제1도는 본 발명의 제조공정을 나타내는 과정도.
제2도는 본 발명에 의해 제조된 연식야구공의 일부를 젤개한 외관사시도.
제3도는 본 발명에 의해 얻어진 연식야구공의 단층 구조도.
* 도면의 주요부분에 대한 부호의 설명
1 : 튜브금형 2 : 배합물질
3 : 압축금형 4 : 튜브부재
5 : 접착층 6 : 공기캡슐
7 : 접착제층 8 : 외피
본 발명은 연식야구공의 제조방법에 관한 것이다.
통상적인 야구공은 내부에 실타래를 넣고 그 외부를 가죽등의 외피로 봉재 부착한 것으로 사용중, 건물의 유리창이나, 기타 충격에 약한 기물을 파손할 우려가 많고, 경기중 부상을 입는 사례가 왕왕 있었다.
한편, 외관은 통상적인 야구공과 동일하고, 단지 내부에 중공상 볼을 넣어 유연성과 탄성력을 배가시킨 연식야구공이 사용되고 있는바, 이것은 주로 어린이들의 연습용이나, 소위 소프트 보올이라는 경기에 주로 사용되고 있는 것이다.
연식 야구공을 제조하는 종래의 방법은 고무튜브에 공기를 불어넣어 진원상의 공을 제조한 다음, 그 외면을 가죽 또는 의혁지와 같은 외피로 피복봉재하여 완성된다.
이러한 방법에 의하면, 고무튜브를 제조하고, 여기에 공기를 적정 압력으로 불어 넣어야 하는 등의 공정이 번거롭고 게다가 공기를 불어넣기 위한 밸브가 요구되어 공의 진원도가 떨어지고, 제조원가가 비싸다는 결점이 있다.
본 발명은 상기한 종래의 방법과는 달리, 고무제 튜브를 형성할 때, 밸브가 없이도 내부에 공기가 충만되도록 함으로서 간편하고 수월한 공정으로 행해지는 연식야구공의 제조방법을 제공함에 그 목적이 있다.
이에 따라 본 발명은 고무제 튜브를 성형함에 있어서 반구형의 튜브부재를 구형으로 합체할 때, 내부에 소정의 압력으로 공기를 보존한 공기캡슐을 투여하고, 접착프레스와 동시에 가열시켜 내부에 공기캡슐이 파괴되는 것에 의해 내부에 공기가 충만된 고무재 튜브를 제조하고, 그 튜브의 외피에 접착층을 도포한 후 통상적인 방식으로 외피를 부착봉재하여 행해짐을 특징으로 한다.
이하 본 발명을 실시예로서 상세히 설명한다.
[실시예]
(제1공정)
제1도의 도시와 같이 반구상의 튜브금형(1)에 배합물질(2)을 투입하고, 압축금형(3)으로 가압하여 반구형의 튜브부재(4)를 성형한다.
배합물질은 SBR 1778, NR#3, CaCo3, ZnO, Ze-O-Sil, S, CZ, D, SA, 기타 집진재를 O.T유에 적의 혼합하여 되는 물질이다.
(제2공정)
상기 공정에서 얻어진 튜브부재(4)를 한쌍으로 포개어 구형의 튜브를 구성하고, 이때, 상호 접합면에 소정의 접착층(5)를 도포하며, 튜브부재(4)의 내측에는 공기캡슐(6)을 투입해 놓는다.
공기캡슐(6)은 D.P.T와 살진산의 혼합물로 캡슐체 내에 상온에서 중량 400mg이 되도록 산소를 주입시켜 놓은 것이며, 이것은 사전에 별도의 공정을 통해 준비해 놓는다.
(제3공정)
튜브부재(4)가 튜브금형(1)내에 보전된 채로 합치시켜 100Kg/㎠의 압력으로 가압함과 동시에 145℃로 가열시켜 준다.
튜브부재(4)가 가열됨에 따라 공기 캡슐(6)의 내부에 보전된 압축산소는 팽창하여 공기캡슐(6)을 파괴하게 되고, 그 결과, 튜브내에는 소정의 공기압이 채워진 튜브가 제조된다.
(제4공정)
상술한 공정에서 얻어진 튜브의 표면에 제2도의 도시와 같이 접착제층(7)을 도포하고 통상적인 방식대로 가죽 또는 의혁지로 된 외피(8)을 접착하여 봉재한다.
접착제층(7)은 생고무 혹은 합성고무에 가황제를 첨가한 것을 사용한다.
이렇게 얻어진 본 발명의 연식야구공은 제3도의 도시와 같은 단층구조를 갖는다.
이러한 구조에 의하여 튜브부재(4)의 표면과 외피(8)사이가 접착제층(7)을 매개로 하여 일체로 접착되어서 사용중, 튜브부재(4)가 외피(8)의 내측에서 슬립하는 일이 없게 되고, 그 결과 종래와 같이 튜브부재의 외표면에 실을 감아 붙여서 슬립되지 않도록 할 필요가 없게 되어, 실감이 공정이 생략되고, 밸브가 없어도 내부에 공기를 충전할 수 있으므로 공정이 간략하고, 전원도가 충실한 연식야구공을 얻을 수 있는 것이다.

Claims (1)

  1. 통상적인 반구상의 튜브금형으로 반구형의 튜브부재를 압축 성형하는 제1공정과, 이 공정에서 얻어진 튜브부재를 튜브 금형과 함께 1쌍을 포개어 접착함과 동시에 공기캡슐을 내부에 투입하는 제2공정과, 포개진 튜브금형을 가열 가압하여 내부의 공기캡슐을 팽창 파열시켜 밸브없이 튜브를 형성하는 제3공정과, 이 튜브의 외부에 통상적인 방식으로 외피를 접착 봉재하는 제4공정으로 행해짐을 특징으로 하는 연식야구공의 제조방법.
KR1019860009646A 1986-11-15 1986-11-15 연식야구공의 제조방법 Expired KR900001940B1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019860009646A KR900001940B1 (ko) 1986-11-15 1986-11-15 연식야구공의 제조방법
US07/253,081 US4880233A (en) 1986-11-15 1988-10-03 Game ball

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019860009646A KR900001940B1 (ko) 1986-11-15 1986-11-15 연식야구공의 제조방법

Publications (2)

Publication Number Publication Date
KR880006039A KR880006039A (ko) 1988-07-21
KR900001940B1 true KR900001940B1 (ko) 1990-03-26

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KR1019860009646A Expired KR900001940B1 (ko) 1986-11-15 1986-11-15 연식야구공의 제조방법

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US (1) US4880233A (ko)
KR (1) KR900001940B1 (ko)

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Also Published As

Publication number Publication date
US4880233A (en) 1989-11-14
KR880006039A (ko) 1988-07-21

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