JPS5634438A - Preparation of ping-pong ball - Google Patents

Preparation of ping-pong ball

Info

Publication number
JPS5634438A
JPS5634438A JP11152079A JP11152079A JPS5634438A JP S5634438 A JPS5634438 A JP S5634438A JP 11152079 A JP11152079 A JP 11152079A JP 11152079 A JP11152079 A JP 11152079A JP S5634438 A JPS5634438 A JP S5634438A
Authority
JP
Japan
Prior art keywords
opening
ping
pair
joined
metal mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11152079A
Other languages
Japanese (ja)
Other versions
JPS614341B2 (en
Inventor
Tatsumi Takahashi
Mitsuhiro Sumimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP11152079A priority Critical patent/JPS5634438A/en
Publication of JPS5634438A publication Critical patent/JPS5634438A/en
Publication of JPS614341B2 publication Critical patent/JPS614341B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00—Producing hollow articles
    • B29D22/04—Spherical articles, e.g. balls
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/02—Deburring or deflashing
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B29C2045/0058—Shaping removing material
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • 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
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/54—Balls

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prepare a homogeneous ping-pong ball by a method wherein the thermoplastic resin is molded through injection by a metal mold having a gate part of specific form, a pair of hollow semi-spherical bodies thus obtained are joined and convex parts formed on the outside surface are removed by gringing. CONSTITUTION:As a metal mold formed by combining a pair of male and female dies 3 and 4 is used the one wherein an opening part 5a widened toward a cavity 6 is provided in the female die 4 (it is preferable that the opening ratio a/b is about 0.24-0.75 and that the opening angle c/b is about 0.3-1). A pair of semi-spherical bodies obtained through injection molding of thermoplastic resin (e.g. nylon 6) by using the above metal mold are joined at their edges of opening by means of a bonding agent to form a hollow spherical body, and then, from the speh spherical body thus obtained are removed, by grinding, convex parts 7 formed in correspondence to the opening of the gate and convex parts 2aa and 2bb formed in correspondence to the joined part, thus a ping-pong ball being obtained.
JP11152079A 1979-08-31 1979-08-31 Preparation of ping-pong ball Granted JPS5634438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11152079A JPS5634438A (en) 1979-08-31 1979-08-31 Preparation of ping-pong ball

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11152079A JPS5634438A (en) 1979-08-31 1979-08-31 Preparation of ping-pong ball

Publications (2)

Publication Number Publication Date
JPS5634438A true JPS5634438A (en) 1981-04-06
JPS614341B2 JPS614341B2 (en) 1986-02-08

Family

ID=14563401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11152079A Granted JPS5634438A (en) 1979-08-31 1979-08-31 Preparation of ping-pong ball

Country Status (1)

Country Link
JP (1) JPS5634438A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60102042U (en) * 1983-12-17 1985-07-11 永井　栄吉 forward rotating ball
JPS60232939A (en) * 1984-05-04 1985-11-19 Oogaki Plast Kogyo Kk Manufacture of double walled lunch box made of theremoplastic resin
JPS6338550U (en) * 1986-08-28 1988-03-12
JP2000185116A (en) * 1998-12-21 2000-07-04 Sumitomo Rubber Ind Ltd Golf ball injection mold and golf ball manufacturing method
JP2001231887A (en) * 1989-03-10 2001-08-28 Spalding Sports Worldwide Inc Golf ball and its manufacturing method
JP2007223217A (en) * 2006-02-24 2007-09-06 Terumo Corp Mold for injection molding of outer cylinder for syringe, manufacturing process of outer cylinder for syringe, outer cylinder for syringe, and pre-field syringe
JP2013212369A (en) * 2012-03-30 2013-10-17 Nike Internatl Ltd Method of making golf ball
EP1972422A4 (en) * 2005-12-14 2014-01-15 Panasonic Corp METHOD FOR MANUFACTURING DOME COVER, DOME COVER AND DOME TYPE CAMERA
CN103819845A (en) * 2014-02-22 2014-05-28 江南大学 Environmental thermoplastic PVC table tennis material and its preparation method of table tennis
CN105619472A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge trimmer
CN105619674A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge trimmer for table tennis production
CN105619673A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge cutting machine
CN106317575A (en) * 2016-08-30 2017-01-11 盐城市艾斯特体育器材有限公司 Polymer composite material for making table tennis balls
WO2017013378A1 (en) * 2015-07-22 2017-01-26 Decathlon Table tennis ball and method for manufacturing same
CN106457027A (en) * 2014-03-21 2017-02-22 韦纳塑料股份有限公司 Celluloid-free, substantially spherical hollow body and fabrication thereof
CN107245216A (en) * 2017-06-21 2017-10-13 合肥博创机械制造有限公司 It is a kind of to be used to manufacture material of table tennis and preparation method thereof
IT202100014639A1 (en) * 2021-06-04 2022-12-04 Sviridi S R L BIODEGRADABLE BALL FOR TABLE TENNIS

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60102042U (en) * 1983-12-17 1985-07-11 永井　栄吉 forward rotating ball
JPS60232939A (en) * 1984-05-04 1985-11-19 Oogaki Plast Kogyo Kk Manufacture of double walled lunch box made of theremoplastic resin
JPS6338550U (en) * 1986-08-28 1988-03-12
JP2001231887A (en) * 1989-03-10 2001-08-28 Spalding Sports Worldwide Inc Golf ball and its manufacturing method
JP2000185116A (en) * 1998-12-21 2000-07-04 Sumitomo Rubber Ind Ltd Golf ball injection mold and golf ball manufacturing method
EP1972422A4 (en) * 2005-12-14 2014-01-15 Panasonic Corp METHOD FOR MANUFACTURING DOME COVER, DOME COVER AND DOME TYPE CAMERA
JP2007223217A (en) * 2006-02-24 2007-09-06 Terumo Corp Mold for injection molding of outer cylinder for syringe, manufacturing process of outer cylinder for syringe, outer cylinder for syringe, and pre-field syringe
JP2013212369A (en) * 2012-03-30 2013-10-17 Nike Internatl Ltd Method of making golf ball
CN103819845A (en) * 2014-02-22 2014-05-28 江南大学 Environmental thermoplastic PVC table tennis material and its preparation method of table tennis
CN103819845B (en) * 2014-02-22 2016-01-20 江南大学 Environment-friendly thermoplastic PVC table tennis materials and prepare the method for table tennis with it
CN106457027A (en) * 2014-03-21 2017-02-22 韦纳塑料股份有限公司 Celluloid-free, substantially spherical hollow body and fabrication thereof
JP2017517353A (en) * 2014-03-21 2017-06-29 ヴェーナー・プラスティック・ゲーエムベーハー A substantially spherical hollow body free from celluloid and its production
US10478678B2 (en) 2014-03-21 2019-11-19 Weener Plastik Gmbh Celluloid-free, substantially spherical hollow body and fabrication thereof
CN108025203B (en) * 2015-07-22 2020-01-31 戴卡特隆有限公司 Table tennis ball and manufacturing method thereof
WO2017013378A1 (en) * 2015-07-22 2017-01-26 Decathlon Table tennis ball and method for manufacturing same
FR3039076A1 (en) * 2015-07-22 2017-01-27 Decathlon Sa TABLE TENNIS BALL AND METHOD OF MANUFACTURING THE SAME
JP2018527971A (en) * 2015-07-22 2018-09-27 デカスロンＤｅｃａｔｈｌｏｎ Table tennis ball and manufacturing method thereof
CN108025203A (en) * 2015-07-22 2018-05-11 戴卡特隆有限公司 Table tennis and its manufacture method
CN105619673A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge cutting machine
CN105619674A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge trimmer for table tennis production
CN105619472A (en) * 2015-12-30 2016-06-01 浙江曙光体育用品有限公司 Edge trimmer
CN106317575A (en) * 2016-08-30 2017-01-11 盐城市艾斯特体育器材有限公司 Polymer composite material for making table tennis balls
CN107245216A (en) * 2017-06-21 2017-10-13 合肥博创机械制造有限公司 It is a kind of to be used to manufacture material of table tennis and preparation method thereof
IT202100014639A1 (en) * 2021-06-04 2022-12-04 Sviridi S R L BIODEGRADABLE BALL FOR TABLE TENNIS

Also Published As

Publication number Publication date
JPS614341B2 (en) 1986-02-08

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