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
  • 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
  • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
  • B29C45/2675—Mounting of exchangeable mould 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
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/30—Mounting, exchanging or centering
  • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
• • 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
  • B29C33/30—Mounting, exchanging or centering
  • B29C33/306—Exchangeable mould parts, e.g. cassette moulds, mould inserts

Definitions

• the object of the invention is a mould, a mould particularly to be used in casting of plastic, to which belong the mould frames to be fastened on top of each other and the moulding plates to be placed between them, between which an object is manufactured.
• the mould plates are fastened to the mould frames by means of bolts, which are fastened in holes made in the moulding plates.
• the moulding plates and the mould frames are centered in regard of the other moulding plates and mould frames with the help of guide pins.
• the fastening of the moulding plates and the centering of them and the mould frames is an accurate work and it takes time.
• the moulding plates form nowadays an integral part of the mould, because the detaching and fastening of them requires the taking apart of the mould. For this reason for manufacturing of different objects separate moulds are required.
• the moulds are expensive to produce and the storage and handling of them takes time and means costs.
• the purpose of the invention is ' to bring forth a mould, in which the moulding plates are easy to change and the mould frame can be used for manufactur ⁇ ing of different objects without having to take the mould apart entirely.
• the aim of the invention is to bring about a mould, in which the mould frames and the moulding plates can be centered accurately, dependably and easily.
• mould which is characterized by that, what is presented in the claims.
• the moulding plate is of the same form as the space and can be placed into the space. Additionally, in the mould frame on the sides of the space holes have been formed and the moulding plate can be fastened from the side on the mould frame with the help of the of the fastening devices placed in the holes.
• the space formed in . the mould frames is at the end of the mould frame and the moulding plate can be easily mounted in its place.
• the moulding plate is manufactured accurately to measure into the size of the space formed in the mould frame and it is fastened simply but tightly in the sideway direction on the mould frame.
• the moulding plates can be easily detached and fastened to the mould frames, so that the same mould frames can be used for manufacturing of several different objects by changing the necessary moulding plates and outpushing devices.
• the advantages of the mould in accordance with the invention are, that the making of the mould is easy and relatively light, because it is not necessary to handle the whole mould, and the making of the mould does not require a such a diversified machinery as does the making of the traditional moulds.
• figure 1 presents the upper part of one of the two mould frames of a mould in accordance with the inven ⁇ tion seen from the above
• figure 2 presents the cross-section of a whole mould cut as shown in figure 1 with the dash lines A-A
• figure 3 presents the cross-section of a whole mould cut as shown in figure 1 with the dash lines B-B .
• mould frames 1, 2 and the between them mountable moulding plates.
• the moulding plates are placed in the in the mould frame formed to its form mainly rectangle shaped space 4, which space in this case to its form is a square with rounded corners.
• the moulding plates are made with accuracy of shape to the form of the space 4.
• the moulding plates are fastened to the mould frames with the fastening devices 6 placed in the holes made from the side on the mould frames.
• fastening devices function conoidic fastening screws and on the moulding plates are on the spots of the holes formed fastening sockets 7 for the fastening screws.
• the conoidic fastening screws fasten the moulding plates tightly on their spots, but they are easy to remove without otherwise demounting the mould frame.
• the fastening screws are positioned in the middle of the side, but the number and the positioning of them can vary in different applications.
• the mould frames are fastened the guiding devices 8 and the guiding devices corresponding counterpart elements 9 for centering of the mould frames in regard of each other at closing of the mould.
• the guiding devices are equipped with wedgeshapedly narrowing surfaces and the counterpart elements are equipped with corre ⁇ sponding " wedgeshapedly downwards narrowing grooves.
• the guiding devices and the counterpart elements are positioned opposite to each other on the mould frames and in accordance with figure 1 in the middle part of the side, but in other applications they can be placed on other spots as well.
• On one of the two mould frames are generally fastened two guiding devices and two counterpart elements, but this also can vary in different applications.
• the mould in accordance with the invention can be used for manufacturing of different kinds of objects by changing of the moulding plates and the outpushing device.
• the desired outpushing device 10 and the desired moulding plates 3 are fastened to the mould frames.
• the outpushing device is fastened to the lower mould frame 2.
• the moulding plates are fastened by placing them first in the space 4 of the mould frames and by fastening them with the fastening screws 6. After this the mould frames are placed supported by the supporting pegs 11 (figure 3) on top of each other.
• the final alignment of the mould is obtained very accurately with the help of the guiding devices 8 and the counterpart elements 9 fastened on the mould frames as they guide themselves in accordance wi"th each other and are guiding the mould frames and the moulding plates accurately in their respective positions.
• the object is manufactured ready the upper mould frame is elevated, the manufactured object is removed with the help of the outpushing device, the upper mould frame is pressed again on its spot and the function is repeated.
• the series needed is manufactured with the moulding plates they are removed from the mould frames for instance by using two outpulling tools, which are mounted in the place of two opposite to each other positioned guiding device or counterpart element and the moulding plates are pulled out.
• new moulding plates and an outpushing device are changed, which fit into all mould frames of the same size.
• the mould frames can be kept in the production continuously and they do not cause any storage or capital costs.

Applications Claiming Priority (2)

Publications (1)

Family

ID=8527759

Family Applications (1)

Country Status (5)

Cited By (5)

Citations (8)

• 1989
  • 1989-01-20 FI FI890299A patent/FI82899C/fi not_active IP Right Cessation
• 1990
  • 1990-01-18 WO PCT/FI1990/000021 patent/WO1990008022A1/en not_active Application Discontinuation
  • 1990-01-18 AU AU48438/90A patent/AU4843890A/en not_active Abandoned
  • 1990-01-18 JP JP50217790A patent/JPH04506482A/ja active Pending
  • 1990-01-18 EP EP19900901603 patent/EP0456648A1/en not_active Withdrawn

Patent Citations (8)

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