GB1570918A - Shaped part made of plastics material manufacturing method - Google Patents

Shaped part made of plastics material manufacturing method Download PDF

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Publication number
GB1570918A
GB1570918A GB498277A GB498277A GB1570918A GB 1570918 A GB1570918 A GB 1570918A GB 498277 A GB498277 A GB 498277A GB 498277 A GB498277 A GB 498277A GB 1570918 A GB1570918 A GB 1570918A
Authority
GB
United Kingdom
Prior art keywords
core
shaped part
plastics material
mould
manufacture
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.)
Expired
Application number
GB498277A
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.)
Cousin Freres SA
Original Assignee
Cousin Freres SA
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 Cousin Freres SA filed Critical Cousin Freres SA
Publication of GB1570918A publication Critical patent/GB1570918A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/008—Using vibrations during 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/123—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels for centering the inserts
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/20—Inserts
    • 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
    • B29L2023/00—Tubular articles
    • 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
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/463—Grips, handles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Description

(54) SHAPED PART MADE OF PLASTICS MATERIAL REINFORCED BY A COMPOSITE CORE AND ITS MANUFACTURING METHOD (71) We, COUSIN FRERES S.A., a company organised under the laws of France, of 59117 Wervicq-Sud, Nord, France, do hereby declare the invention for which we pray that a Patent may be granted to us and the method by which it is to be performed, to be particularly described in and by the following statement: There is already known a method for the manufacture in synthetic plastics material of shaped parts reinforced by a porous care generally made of glass fibers (see French Patent 75 07 964 filed 10th March 1975).
This core is placed in a mould before the mould is filled with the synthetic plastics material.
The present invention particularly relates to a method for the manufacture in natural or synthetic material of a shaped part reinforced with a composite core. The invention relates also to the shaped part obtained with this method.
The present invention provides a method for the manufacture of a shaped part made of plastics material, characterized in that there is placed in the central area of a mould and held by suitable components fixed in the mould, at least one core made of resin impregnated fibers and that there is then injected in said mould a plastics material compatible with both the material of the fibers and with the resin of the core.
The present invention further provides a shaped part of plastics material, characterized in that it comprises at least one core constituted by various fibers impregnated with a resin, said core being placed in the central zone of the shaped part and enclosed through moulding in a natural or synthetic plastics material compatible with both the material of the fibers and with the resin constituting the core.
Various other features of the invention are shown in the following detailed description.
Embodiments of the present invention are shown by way of example in the accompanying drawings, wherein: Figure 1 is a partly exploded perspective view of a mould for the realization of a shaped part according to the invention.
Figure 2 is a partly cross-sectional perspective view of a second embodiment of the mould.
In Figure 1 there is shown a mould with two portions 1, 2 each of the portions forming a half-mould 3, 4 having, in the present example, a shape required to obtain a tool handle, for example the handle of a garden rake. In each half-mould 3, 4 of the portions 1, 2 are firstly placed cores 5, 6 which are fixed in correct position in these moulds, by pins 7, 8, 9 placed in the present example at 1200 to permit the main core 5 and the reinforcement core 6 to be correctly positioned.
These cores are, most of the time, made of plastics fibers such as glass fibers of natural or synthetic plastics material; these fibers being braided, woven, non-woven or moulded under pressure, then coated with a resin compatible with the material thereof in order to obtain a sufficient strength. Generally a heat-hardenable resin is used as a resin.
When the mould 1, 2 contains the main core 5 and its reinforcement core 6, said mould is closed and there is injected, by any suitable means, the plastics material through the opening 15 to form the shaped part proper, which is, in the present example, a handle of an agricultural tool. To obtain a good distribution of the plastics material 10 and a correct clamping thereof on the main core 5 and the reinforcement core 6 which is normally placed in the area of the shaped part having to stand the most important stresses, it is possible to give to the mould a slow rotation or to submit the mould to vibrations.
To complete the reinforcement of the working area of the shaped part, as shown in Figure 1, it is possible to make a certain quantity of plastics material to penetrate at 10a, thus giving to the shaped part an extremely strong structure.
As shown in Figure 1, the end portion of the handle is slightly cone-shaped in the area 10b.
In Figure 2, the mould is constituted by two elements 20, 21 perfectly joined together and each comprising half-moulds 22, 23 with a widened end portion so as to obtain, in the present case, a greater diameter towards the end 24 in order to make, for example, the handle of a pickaxe.
As in the previous case, a main core 25 is reinforced by an additional core 26 in the portion of the handle having to stand the more important stresses and these cores which are similar to the cores previously described, but with a different diameter, are also held in place in the mould by means of pins 27, 28, 29 placed 1200 from each other, then plastics material 30 is injected as previously described through the channel 40.
Generally the plastics materials which are the more often used for the manufacture of these shaped parts 10 or 30 are polyurethane foam materials.
This method permits to obtain, with the above described moulds, shaped parts such as handles or agricultural tools which are, after polymerization of the plastics material 10 or 30, of a sufficient hardness; but the shaped part remains flexible and, when used as a tool handle, it permits to attenuate the percussions, which is extremely pleasant for the person using the tool since his hands are not submitted to repeated and painful vibrations or shocks.
WHAT WE CLAIM IS: 1. Method for the manufacture of a shaped part made of plastics material, characterized in that there is placed in the central area of a mould and held by suitable components fixed in the mould, at least one core made of resin impregnated fibers and that there is then injected in said mould a plastics material compatible with both the material of the fibers and with the resin of the core.
2. Method for the manufacture of a shaped part as set forth in claim 1, wherein the mould is submitted to a slow rotation upon moulding.
3. Method for the manufacture of a shaped part as set forth in either claim 1 or 2, wherein the mould is submitted to vibrations during moulding.
4. A method according to claim 1,2 or 3, wherein said core is hollow.
5. A method according to any one of the preceding claims, wherein said core is spongy.
6. Shaped part of plastics material, characterized in that it comprises at least one core constituted by various fibers impregnated with a resin, said core being placed in the central zone of the shaped part and enclosed through moulding in a natural or synthetic plastics material compatible with both the material of the fibers and with the resin constituting the core.
7. A shaped part according to claim 6, wherein said core is hollow.
8. A shaped part according to claim 6 or 7, wherein said core is spongy.
9. A shaped part as set forth in claim 6,7 or 8 characterized in that it comprises a reinforcing core placed concentrically to the first core in the area where the shaped part is submitted to the most important stresses.
10. A shaped part as set forth in any one of claims 6 to 9, characterized in that the main core is hollow, some plastics material constituting the part being enclosed in the whole or a portion of the main hollow core.
11. Shaped part as set forth in any of claims 6 to 10, wherein the plastics material is a polyurethane foam material.
12. A Method for the manufacture of a shaped part as set forth in any one of claims 1 to 5, characterized in that the mould comprises portions with locations for placing pins holding the core.
13. A Method for the manufacture of a shaped part made of plastics material, substantially as hereinbefore described in the attached description.
14. A Shaped part of plastics material, substantially as hereinbefore described in the attached description, and in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. giving to the shaped part an extremely strong structure. As shown in Figure 1, the end portion of the handle is slightly cone-shaped in the area 10b. In Figure 2, the mould is constituted by two elements 20, 21 perfectly joined together and each comprising half-moulds 22, 23 with a widened end portion so as to obtain, in the present case, a greater diameter towards the end 24 in order to make, for example, the handle of a pickaxe. As in the previous case, a main core 25 is reinforced by an additional core 26 in the portion of the handle having to stand the more important stresses and these cores which are similar to the cores previously described, but with a different diameter, are also held in place in the mould by means of pins 27, 28, 29 placed 1200 from each other, then plastics material 30 is injected as previously described through the channel 40. Generally the plastics materials which are the more often used for the manufacture of these shaped parts 10 or 30 are polyurethane foam materials. This method permits to obtain, with the above described moulds, shaped parts such as handles or agricultural tools which are, after polymerization of the plastics material 10 or 30, of a sufficient hardness; but the shaped part remains flexible and, when used as a tool handle, it permits to attenuate the percussions, which is extremely pleasant for the person using the tool since his hands are not submitted to repeated and painful vibrations or shocks. WHAT WE CLAIM IS:
1. Method for the manufacture of a shaped part made of plastics material, characterized in that there is placed in the central area of a mould and held by suitable components fixed in the mould, at least one core made of resin impregnated fibers and that there is then injected in said mould a plastics material compatible with both the material of the fibers and with the resin of the core.
2. Method for the manufacture of a shaped part as set forth in claim 1, wherein the mould is submitted to a slow rotation upon moulding.
3. Method for the manufacture of a shaped part as set forth in either claim 1 or 2, wherein the mould is submitted to vibrations during moulding.
4. A method according to claim 1,2 or 3, wherein said core is hollow.
5. A method according to any one of the preceding claims, wherein said core is spongy.
6. Shaped part of plastics material, characterized in that it comprises at least one core constituted by various fibers impregnated with a resin, said core being placed in the central zone of the shaped part and enclosed through moulding in a natural or synthetic plastics material compatible with both the material of the fibers and with the resin constituting the core.
7. A shaped part according to claim 6, wherein said core is hollow.
8. A shaped part according to claim 6 or 7, wherein said core is spongy.
9. A shaped part as set forth in claim 6,7 or 8 characterized in that it comprises a reinforcing core placed concentrically to the first core in the area where the shaped part is submitted to the most important stresses.
10. A shaped part as set forth in any one of claims 6 to 9, characterized in that the main core is hollow, some plastics material constituting the part being enclosed in the whole or a portion of the main hollow core.
11. Shaped part as set forth in any of claims 6 to 10, wherein the plastics material is a polyurethane foam material.
12. A Method for the manufacture of a shaped part as set forth in any one of claims 1 to 5, characterized in that the mould comprises portions with locations for placing pins holding the core.
13. A Method for the manufacture of a shaped part made of plastics material, substantially as hereinbefore described in the attached description.
14. A Shaped part of plastics material, substantially as hereinbefore described in the attached description, and in the accompanying drawings.
GB498277A 1976-02-06 1977-02-07 Shaped part made of plastics material manufacturing method Expired GB1570918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7603366A FR2340190A2 (en) 1976-02-06 1976-02-06 PLASTIC PROFILE REINFORCED BY A COMPOSITE REINFORCEMENT AND ITS MANUFACTURING PROCESS

Publications (1)

Publication Number Publication Date
GB1570918A true GB1570918A (en) 1980-07-09

Family

ID=9168855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB498277A Expired GB1570918A (en) 1976-02-06 1977-02-07 Shaped part made of plastics material manufacturing method

Country Status (5)

Country Link
BE (1) BE851062A (en)
DE (2) DE7702988U1 (en)
FR (1) FR2340190A2 (en)
GB (1) GB1570918A (en)
NL (1) NL7701229A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004145A1 (en) * 1989-09-18 1991-04-04 Herbert Clarence Spiller Moulding of articles in plastics
EP1215025A2 (en) * 2000-11-18 2002-06-19 Bayerische Motoren Werke Aktiengesellschaft Method of making fiber reinforced plastic sandwich constructions
CN112519269A (en) * 2019-09-19 2021-03-19 山东非金属材料研究所 Method for forming fiber reinforced resin matrix composite material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058555A1 (en) * 1981-02-17 1982-08-25 National Plastics Limited Reinforced hollow or tubular articles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1404394B2 (en) * 1958-05-16 1970-08-13 Möller, Hans Günter, 2870 Delmenhorst Hanover 1958, 3000 Hanover procedure for. Manufacture of a plastic tub
US3123403A (en) * 1958-08-20 1964-03-03 shrinkages oversize
GB1073932A (en) * 1965-07-20 1967-06-28 Piero Modigliani S R L Lab Methods of producing fiber glass reinforced polyurethane panels or sheets and panels or sheets so made
FR1465502A (en) * 1965-11-09 1967-01-13 Piero Modigliani S R L Lab Manufacturing process of building materials, using cocoons of silk-glass impregnated with plastics
FR1536243A (en) * 1966-05-11 1968-08-16 Bayer Ag Process for manufacturing molded bodies optionally provided with covering layers
DE2109934C3 (en) * 1971-03-02 1978-10-12 Klepper-Werke, 8200 Rosenheim Fin, method and device for their manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004145A1 (en) * 1989-09-18 1991-04-04 Herbert Clarence Spiller Moulding of articles in plastics
EP1215025A2 (en) * 2000-11-18 2002-06-19 Bayerische Motoren Werke Aktiengesellschaft Method of making fiber reinforced plastic sandwich constructions
EP1215025A3 (en) * 2000-11-18 2003-03-12 Bayerische Motoren Werke Aktiengesellschaft Method of making fiber reinforced plastic sandwich constructions
CN112519269A (en) * 2019-09-19 2021-03-19 山东非金属材料研究所 Method for forming fiber reinforced resin matrix composite material

Also Published As

Publication number Publication date
NL7701229A (en) 1977-08-09
DE2704304A1 (en) 1977-08-18
BE851062A (en) 1977-05-31
FR2340190B2 (en) 1980-04-04
FR2340190A2 (en) 1977-09-02
DE7702988U1 (en) 1978-12-14

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee