US3093863A - Die-casting or injection-moulding machines - Google Patents

Die-casting or injection-moulding machines Download PDF

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US3093863A
US3093863A US102152A US10215261A US3093863A US 3093863 A US3093863 A US 3093863A US 102152 A US102152 A US 102152A US 10215261 A US10215261 A US 10215261A US 3093863 A US3093863 A US 3093863A
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carrier plate
mold
anchoring rods
mould
stationary
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US102152A
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Ehlert Helmut
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Schloemann AG
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Schloemann AG
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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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic
    • B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
    • B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
    • B29C45/6728—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould the separate element consisting of coupling rods
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/223—Injection mold closing means utilizing variable closing pressure

Definitions

  • This invention relates to a die'cas-ting or injection moulding machine, suitable for the production of moulded bodies, particularly from thermoplastic synthetic substances, comprising a stationary mould-carrier plate for the accommodation of one mould member, and, for the accommodation of the other mould member, a movable mould-carrier plate guided on guiding bars, this movable mould-carrying plate being displaceable by means of a hydraulic feeding and returning device, and being pro vided with anchoring rods, which, in the closed position of the movable mould-carrier plate, extend into the stationary mould-carrier plate, and can be locked against the latter, one or more axially extensible pressure pads, for the production of the mould-closing pressure, being arranged in the power linkage between the mould parts, the mould-carrier plates and the anchoring rods.
  • Such die-casting machines as are described for instance in the United States patent specification No. 2,526,918 and in the Dutch patent specification No. 83,969 mostly comprise a complicated and bulky structure, which is conditioned by varoius rod-and-lever mechanisms, bearing devices for the feeding and returning cylinder, and holding means for the anchoring rods, and also by auxiliary devices, and by space obstructing pipes, located outside the machine, for the various hydraulic pressure appliances.
  • This always results in a comparatively great overall length of the machine which leads to excessive lengths in the case of relatively large machines, for the production of rather heavy die castings; and such large machines, considered spatially, are no longer economically defensible.
  • the object of the present invention is to improve dieoasting machines in this respect.
  • the die-casting machine according to the invention is distinguished 'by the fact that the anchoring rods are bored hollow, and are axially slidable upon the guiding bars, of the movable mouldcarrier plate, and that the guiding bars are provided with piston-like thickenings, the guiding bars and anchoring rods being constructed as a double-acting hydraulically powered piston-and-cylinder system for the displacement of the movable mould-carrier plate.
  • the anchoring rods should be secured in the movable mould-carrier plate in an axially adjustable manner.
  • the anchoring rods are secured by providing them with external screw threads, while in the movable mould-carrier plate, corresponding adjusting nuts are rotatably mounted, and are secured against axial displacement. This provides the possibility of continuously adjusting the height of the mould assembly to any desired dimension, so that moulds of any thickness can be used without distance pieces or the like hav- 3,093,863 Patented June 18, 1963 ing to he slipped in between the mould and the mouldcarrier plate.
  • the anchoring rods may advantageously be each provided with a longitudinal groove, in which there engages a slide-block embedded in the movable mould-carrier plate.
  • the pressure pads associated with the anchoring rods are arranged between the stationary mould-carrier plate and the locking means that arrest the anchoring rods, the clamping jaws of the locking means, which are to engage in the anchoring rods, being displaceable in the axial direction of the anchoring rods through a distance corresponding to the stroke of the pressure pads.
  • the pressure pads are accordingly supported upon a stationary part of the machine, so that the feed pipes of all the pressure appliances can likewise be stationarily passed through the interior of the machine.
  • FIGURE 1 shows, partly in section, a die-casting machine according to the invention, with the movable mouldcarrier plate in the closed position;
  • FIGURE 2 is a side view of the closing frame or the fixed mould-carrier plate, likewise partly in section, and discloses the method of working of the locking means;
  • FIGURE 3 represents a plan of the stationary mouldcarrier plate, and shows the suspension of the guiding bars.
  • FIGURE 1 by 1 is denoted plastifying and casting apparatus constructed in any convenient manner, the injection cylinder 2 of which engages through a front mouldcarrier plate 4, to open into the pouring-in bore of a mould, not shown.
  • the mould-carrier plate 4 is fixedly mounted upon a base-plate 3, and constitutes the front cross-piece of a mould-closing frame, which furthermore comprises a rear cross-piece 5, likewise stationary on the base-plate 3, and guiding bars 6 connecting these two cross-pieces.
  • the movable mould-carrier plate 7 is slidably mounted upon the base-plate 3. For the ac curate parallel guidance thereof the guiding bars 6 are employed, of which four are provided altogether.
  • Anchoring rods, 8, which are each secured by one end in the movable mould-carrier plate 7, are bored hollow, and are axially slidable upon the guiding bars 6.
  • annular grooves 9 are provided, in which the clamping jaws 10 and 11 of a looking means, which are located opposite to one another in pairs, can engage.
  • the clamping jaws 10 and 11, which are carried, together with the locking means, by the stationary mouldcarrier plate 4, are semi-saucer-shaped, and can be reciprocated by means of two double-acting pistons 12 and 13, oppositely working, arranged in a common cylinder 14.
  • the clamping jaws 10, and also the clamping jaws 11, of the two locking devices located horizontally side by side, which execute movements in the same direction for the engagement and disengagement are connected with one another by connecting bars :17, so that the clamping jaws connected with one another always execute their closing and opening movements jointly, although at times only one clamping jaw may be connected by a piston rod 15 or 16 with the corresponding piston 12 or 13.
  • a turnbuckle 18 is provided in each bar.
  • the anchoring rods 8, secured in the movable mouldcarrier plate 7 and slipped over the guiding bars 6, are sealed in an oiltight manner to the bars 6 by means of stutfing-boxes 20 let into them at their ends; and by piston-like thickenings provided at 21 on the guiding bars 6, two hydraulic working spaces 22 and 23 are provided in the interior of the anchoring rods 8.
  • the supplying of oil under pressure to the working spaces 22 and 23 is preferably eiiected through ducts in the guiding bars 6.
  • the anchoring rods 8 are provided, in their adjustment region, with an external sscrew thread 24, on to which an adjusting nut 25 is screwed, which is rotatably supported in the movable mould-carrier plate 7.
  • the adjusting nuts 25 are protected against axial movements by collars turned thereon, which bear towards one side against the bearing bore, and, towards the other side, against rings 26, flanged on to the mould-carrier plate 7.
  • toothed chain Wheels 27 are mounted fast, and around these runs an endless chain 28, which is common to all four of the adjusting nuts 25.
  • the chain 28 also runs over the pinion of a drive 29, of an electric motor for example, which is mounted within the mould-carrier plate 7.
  • the adjusting nuts may of course alternatively be driven through the medium of jointed spindles or the like.
  • a longitudinal groove 30 is formed in each anchoring rod, in which a slide-block 31, let into the mouldcarrier plate 7, engages.
  • pressure pads 32 are provided, one of which is associated, in a manner known in itself, with each of the anchoring rods 8.
  • the pressure pads 32 are made very flat, and are accordingly of small thickness. They are of annular construction, and are secured to the stationary mould-carrier plate 4, and are arranged between the latter and the The arrangement is such that the anchoring rods 8, which, in the closed position of the movable part of the mould, pene trate into the stationary mould-carrier plate 4, extend through the annular apertures of the pressure pads, to pass into the locking region of the clamping jaws 10 and :11.
  • a high-pressure pump may be interposed in the admission path for pressure liquid to the working spaces 23, to be transiently actuated.
  • bearing yoke 34 Upon the stationary mould-carrier plate 4 are provided an upper and a lower bearing yoke 34, which are secured to the carrier plate itself with strong screw connections 35.
  • These bearing yokes 34 may in practice be regarded as fixed parts of the mould-carrier plate 4, since in their heads are lodged the bearing bores for the guiding bars 6, and in their interior are provided slideways 36 for guiding the clamping jaws 10 and 11, as well as compression springs 37 or the like which co-operate with the clamping jaws.
  • the compression springs 37 which are inserted, in the axial direction of the guiding bars 6 and of the anchoring rods 8, each between a pair of clamping jaws 10, 11 and one of the bearing yokes, act against the pressure pads 32, and are of such strength that when the pressure pads are unloaded they push the clamping jaws 10 and 1-1, and also the pressure pads themselves, into the zero or initial position.
  • the machine here described and illustrated is one possible constructional example, to which the invention is not directly restricted. Modifications may on the contrary be made according to requirements.
  • the invention may be used not only for injection die-casting machines for the treatment of thermoplastic synthetic materials, but also tor pressing or casting machines for the treatment of metals or of wood-fibre pulp.
  • a die-casting machine for the production of molded bodies, particularly from thermo-plastic synthetic substances comprising: a stationary mold-carrier plate, adapted to carry one mold member, a movable mold-carrier plate, also adapted to carry one mold member, cylindrically bored anchoring rods each secured by one end to the movable mold-carrier plate and each extending into the stationary mold-carrier plate, means for locking the anchoring rods to the stationary mold-carrier plate, so as to hold the mold members in the closed position, pressure pads provided between the said locking means and the stationary mold-carrier plate and adapted to press the two mold members against one another when the anchoring rods are locked to the stationary mold-carrier plate, guiding bars for guiding the movable mold-carrier plate, each extending through the cylindrical bore of one of the anchoring rods, and each supported at one end by the stationary mold-carrier plate, a stationary crosspiece supporting the other end of each of the guiding bars, pistons secured to the guiding bars within the cylindrical bores of the anchoring rods
  • each E5 of the anchoring rods being formed with a longitudinal gnocve, and the machine further comprising for each anchoring rod a slide block, fixed in the movable moldcarrier plate, and engaging in the said longitudinal groove, to prevent rotary motion of the anchoring rod.
  • the means for locking the anchoring rods comprising: clamping jaws positively engaging the anchoring rods, the pressure pads being provided between the said clamping jaws and the stationary mold carrier plate, and means for axially extending the pressure pads and thereby increasing the thrust of the mold members against one another, after the mold has been closed by admitting fluid under pressure to the appropriate side of the pistons.
  • a die casting machine as claimed in claim 6, further comprising bearing yokes secured to the stationary mold-carrier plate, and compression springs interposed between the pressure pads and the bearing yokes.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

June 18, 1963 H. EHLERT 3,
DIE-CASTING 0R INJECTION-.MOULDING MACHINES Filed April 11, 1961 2 Sheets-Sheet 1 June 18, 1963 H. EHLERT 3,093,863
DIE-CASTING OR INJECTION-MOULDING MACHINES Filed April 11, 1961 2 Sheets-Sheet 2 United States Patent 3,093,863 DIE-CASTING 0R INJECTION-MOULDING MACHINES Helmut Ehlert, Monclien-Gladbach,Germany, assignor to Schloemann Aktiengesellschaft, Dusseldorf, Germany Filed Apr. 11, 1961, Ser. No. 102,152 Claims priority, application Germany Apr. 28, 1960 7 Claims. (Cl. 18-30) This invention relates to a die'cas-ting or injection moulding machine, suitable for the production of moulded bodies, particularly from thermoplastic synthetic substances, comprising a stationary mould-carrier plate for the accommodation of one mould member, and, for the accommodation of the other mould member, a movable mould-carrier plate guided on guiding bars, this movable mould-carrying plate being displaceable by means of a hydraulic feeding and returning device, and being pro vided with anchoring rods, which, in the closed position of the movable mould-carrier plate, extend into the stationary mould-carrier plate, and can be locked against the latter, one or more axially extensible pressure pads, for the production of the mould-closing pressure, being arranged in the power linkage between the mould parts, the mould-carrier plates and the anchoring rods.
Such die-casting machines as are described for instance in the United States patent specification No. 2,526,918 and in the Dutch patent specification No. 83,969 mostly comprise a complicated and bulky structure, which is conditioned by varoius rod-and-lever mechanisms, bearing devices for the feeding and returning cylinder, and holding means for the anchoring rods, and also by auxiliary devices, and by space obstructing pipes, located outside the machine, for the various hydraulic pressure appliances. This always results in a comparatively great overall length of the machine, which leads to excessive lengths in the case of relatively large machines, for the production of rather heavy die castings; and such large machines, considered spatially, are no longer economically defensible.
The object of the present invention is to improve dieoasting machines in this respect. The die-casting machine according to the invention is distinguished 'by the fact that the anchoring rods are bored hollow, and are axially slidable upon the guiding bars, of the movable mouldcarrier plate, and that the guiding bars are provided with piston-like thickenings, the guiding bars and anchoring rods being constructed as a double-acting hydraulically powered piston-and-cylinder system for the displacement of the movable mould-carrier plate.
By such a construction and arrangement of the anchoring rods and the displacing means for the movable mouldcarrier plate, the result is obtained in a simple manner that for the accommodation of these machine elements no further space is needed than that which must in any case be available for the opening of the mould when the height of the mould assembly is greatest. Further-more, convenient accessibility to the space between the mould parts is ensured, so that a casting can be easily taken out of the mould, and the mould itself can also "be easily changed.
For the accurate adjusting of the height of the mould assembly it has been found advantageous that the anchoring rods should be secured in the movable mould-carrier plate in an axially adjustable manner. According to a further feature of the invention the anchoring rods are secured by providing them with external screw threads, while in the movable mould-carrier plate, corresponding adjusting nuts are rotatably mounted, and are secured against axial displacement. This provides the possibility of continuously adjusting the height of the mould assembly to any desired dimension, so that moulds of any thickness can be used without distance pieces or the like hav- 3,093,863 Patented June 18, 1963 ing to he slipped in between the mould and the mouldcarrier plate. Moreover the use of quite narrow pressure pads, with only quite a small stroke, is hereby rendered possible, so that no special space is required for the accommodation of the pressure pads. Moreover by this arrangement, the transmission linkage, operative in closing the mould, for the mould members, the mould-carrier plates and the anchoring rods, is restricted to the shortest possible dimension.
Furthermore a drive, common to all the adjusting nuts, and carried by the movable mould-carrier plate, is advantageously provided, whereby a convenient adjusting of the height of the mould assembly is ensured.
In order to prevent any turning of the anchoring rods themselves when they are being adjusted within the movable mouldcarrier plate, the anchoring rods may advantageously be each provided with a longitudinal groove, in which there engages a slide-block embedded in the movable mould-carrier plate.
Further features are to be seen in the fact that in a manner known in itself the pressure pads associated with the anchoring rods are arranged between the stationary mould-carrier plate and the locking means that arrest the anchoring rods, the clamping jaws of the locking means, which are to engage in the anchoring rods, being displaceable in the axial direction of the anchoring rods through a distance corresponding to the stroke of the pressure pads. The pressure pads are accordingly supported upon a stationary part of the machine, so that the feed pipes of all the pressure appliances can likewise be stationarily passed through the interior of the machine.
- There are therefore no obstructive flexible pipes to disturb the working of the machine, whereby also the risks occasioned by flexible pipes, for instance bursts or like interferences with working, are eliminated.
It is furthermore an advantage, for the quick working of the machine, that compression springs or like resilient elements are provided, which act against the pressure pads, and which, when the pressure pads are relieved of load, return not only the pressure pads themselves but also the clamping jaws of the locking means into the initial position, or retain them in their initial position. The advantage of this arrangement resides in the fact that after the relieving of the pressure pads nospecial manipulations or automatic controlling operations are neces sary in order to bring the pressure pads and the clamping jaws back into the initial position. The assurance is therefore also given that for each working cycle of the machine the clamping jaws will be located in the correct initial position that is necessary for a smooth and positive or form-closed engagement, and that the full stroke of the pressure pads will be available each time for closing the mould.
One form of construction of a die-casting machine according to the invention is illustrated by way of example in the accompanying drawings, so far as is necessary for the comprehension of the invention.
FIGURE 1 shows, partly in section, a die-casting machine according to the invention, with the movable mouldcarrier plate in the closed position;
FIGURE 2 is a side view of the closing frame or the fixed mould-carrier plate, likewise partly in section, and discloses the method of working of the locking means; and
FIGURE 3 represents a plan of the stationary mouldcarrier plate, and shows the suspension of the guiding bars.
In FIGURE 1, by 1 is denoted plastifying and casting apparatus constructed in any convenient manner, the injection cylinder 2 of which engages through a front mouldcarrier plate 4, to open into the pouring-in bore of a mould, not shown. The mould-carrier plate 4 is fixedly mounted upon a base-plate 3, and constitutes the front cross-piece of a mould-closing frame, which furthermore comprises a rear cross-piece 5, likewise stationary on the base-plate 3, and guiding bars 6 connecting these two cross-pieces. The movable mould-carrier plate 7 is slidably mounted upon the base-plate 3. For the ac curate parallel guidance thereof the guiding bars 6 are employed, of which four are provided altogether. Anchoring rods, 8, which are each secured by one end in the movable mould-carrier plate 7, are bored hollow, and are axially slidable upon the guiding bars 6. At the tree ends of the anchoring rods 8, annular grooves 9 are provided, in which the clamping jaws 10 and 11 of a looking means, which are located opposite to one another in pairs, can engage.
The clamping jaws 10 and 11, which are carried, together with the locking means, by the stationary mouldcarrier plate 4, are semi-saucer-shaped, and can be reciprocated by means of two double- acting pistons 12 and 13, oppositely working, arranged in a common cylinder 14. In this connection it is to be noted that the clamping jaws 10, and also the clamping jaws 11, of the two locking devices located horizontally side by side, which execute movements in the same direction for the engagement and disengagement, are connected with one another by connecting bars :17, so that the clamping jaws connected with one another always execute their closing and opening movements jointly, although at times only one clamping jaw may be connected by a piston rod 15 or 16 with the corresponding piston 12 or 13. To enable the length of the connecting bars 17 to be accurately adjusted, a turnbuckle 18 is provided in each bar.
The anchoring rods 8, secured in the movable mouldcarrier plate 7 and slipped over the guiding bars 6, are sealed in an oiltight manner to the bars 6 by means of stutfing-boxes 20 let into them at their ends; and by piston-like thickenings provided at 21 on the guiding bars 6, two hydraulic working spaces 22 and 23 are provided in the interior of the anchoring rods 8. When pressure oil or the like is introduced into the space 22, the movable mould-carrier plate 7 is moved towards the stationary mould-carrier plate 4, that is to say; the mould is closed, whereas when pressure oil is forced into the space 23, the movable mould-carrier plate is pushed away from the stationary plate, that is, the mould is opened. The supplying of oil under pressure to the working spaces 22 and 23 is preferably eiiected through ducts in the guiding bars 6.
To enable the anchoring rods 8 to be adjusted within the movable mould-carrier plate 7 when an alteration occurs in the height of the mould assembly, the anchoring rods are provided, in their adjustment region, with an external sscrew thread 24, on to which an adjusting nut 25 is screwed, which is rotatably suported in the movable mould-carrier plate 7. The adjusting nuts 25 are protected against axial movements by collars turned thereon, which bear towards one side against the bearing bore, and, towards the other side, against rings 26, flanged on to the mould-carrier plate 7. Upon the rims of the adjusting nuts 25, projecting from the bearing bores, toothed chain Wheels 27 are mounted fast, and around these runs an endless chain 28, which is common to all four of the adjusting nuts 25. The chain 28 also runs over the pinion of a drive 29, of an electric motor for example, which is mounted within the mould-carrier plate 7. By this drive the four adjusting nuts can all be rotated simultaneously and uniformly. The adjusting nuts may of course alternatively be driven through the medium of jointed spindles or the like. In order to prevent the anchoring rods 8 turning when the adjusting nuts 25' are being actuated, a longitudinal groove 30 is formed in each anchoring rod, in which a slide-block 31, let into the mouldcarrier plate 7, engages.
' clamping jaws 10 and 11 of the locking device.
For the production of the mould-closing pressure that is necessary for holding thermould parts together, four pressure pads 32 are provided, one of which is associated, in a manner known in itself, with each of the anchoring rods 8. The pressure pads 32 are made very flat, and are accordingly of small thickness. They are of annular construction, and are secured to the stationary mould-carrier plate 4, and are arranged between the latter and the The arrangement is such that the anchoring rods 8, which, in the closed position of the movable part of the mould, pene trate into the stationary mould-carrier plate 4, extend through the annular apertures of the pressure pads, to pass into the locking region of the clamping jaws 10 and :11.
' to the movable mould-carrying plate 7, so that the movable mould part secured thereto is pressed with great force against the fixed mould part. To open the mould, the pressure pads are relieved, and pressure liquid is admitted into the hydraulic working spaces 23 located in the anchoring rods 8. If the mould parts tend to stick together when the mould is being opened, a high-pressure pump may be interposed in the admission path for pressure liquid to the working spaces 23, to be transiently actuated.
Upon the stationary mould-carrier plate 4 are provided an upper and a lower bearing yoke 34, which are secured to the carrier plate itself with strong screw connections 35. These bearing yokes 34 may in practice be regarded as fixed parts of the mould-carrier plate 4, since in their heads are lodged the bearing bores for the guiding bars 6, and in their interior are provided slideways 36 for guiding the clamping jaws 10 and 11, as well as compression springs 37 or the like which co-operate with the clamping jaws. The compression springs 37, which are inserted, in the axial direction of the guiding bars 6 and of the anchoring rods 8, each between a pair of clamping jaws 10, 11 and one of the bearing yokes, act against the pressure pads 32, and are of such strength that when the pressure pads are unloaded they push the clamping jaws 10 and 1-1, and also the pressure pads themselves, into the zero or initial position.
The machine here described and illustrated is one possible constructional example, to which the invention is not directly restricted. Modifications may on the contrary be made according to requirements. Thus the invention may be used not only for injection die-casting machines for the treatment of thermoplastic synthetic materials, but also tor pressing or casting machines for the treatment of metals or of wood-fibre pulp.
I claim:
1. A die-casting machine for the production of molded bodies, particularly from thermo-plastic synthetic substances, comprising: a stationary mold-carrier plate, adapted to carry one mold member, a movable mold-carrier plate, also adapted to carry one mold member, cylindrically bored anchoring rods each secured by one end to the movable mold-carrier plate and each extending into the stationary mold-carrier plate, means for locking the anchoring rods to the stationary mold-carrier plate, so as to hold the mold members in the closed position, pressure pads provided between the said locking means and the stationary mold-carrier plate and adapted to press the two mold members against one another when the anchoring rods are locked to the stationary mold-carrier plate, guiding bars for guiding the movable mold-carrier plate, each extending through the cylindrical bore of one of the anchoring rods, and each supported at one end by the stationary mold-carrier plate, a stationary crosspiece supporting the other end of each of the guiding bars, pistons secured to the guiding bars within the cylindrical bores of the anchoring rods, stufling boxes closing the ends of the hollow anchoring rods, and means for admitting fluid under pressure to the cylindrical bores of the anchoring rods on either side of the pistons so as to displace the anchoring rods, together with the movable mold-carrier plate and the mold member carried thereby relatively to the guide bars, for the purpose of opening and closing the mold.
2. A die-casting machine as claimed in claim 1, the anchoring rods being secured to the movable mold-carrier plate in an axially adjustable manner, to allow for difierences in height of the mold assembly.
3. A die-casting machine as claimed in claim 1, further comprising: external screw threads on the anchoring rods, adjusting nuts engaging these external screw threads, rotatably mounted in the movable mold-carrier plate, and means for securing the adjusting nuts against axial displacement.
4. A die-casting machine as claimed in claim 3, further comprising a common drive, carried by the movable mold-carrier palte, for simultaneously turning all the adjusting nuts.
5. A die-casting machine as claimed in claim 3, each E5 of the anchoring rods being formed with a longitudinal gnocve, and the machine further comprising for each anchoring rod a slide block, fixed in the movable moldcarrier plate, and engaging in the said longitudinal groove, to prevent rotary motion of the anchoring rod.
6. A die-casting machine as claimed in claim 1, the means for locking the anchoring rods comprising: clamping jaws positively engaging the anchoring rods, the pressure pads being provided between the said clamping jaws and the stationary mold carrier plate, and means for axially extending the pressure pads and thereby increasing the thrust of the mold members against one another, after the mold has been closed by admitting fluid under pressure to the appropriate side of the pistons.
7. A die casting machine as claimed in claim 6, further comprising bearing yokes secured to the stationary mold-carrier plate, and compression springs interposed between the pressure pads and the bearing yokes.
References (Cited in the file of this patent UNITED STATES PATENTS 2,526,803 Carlson et al Oct. 24, 1950 2,862,238 Cuzzi Dec. 2, 1958 2,916,768 Quere et al. Dec. 15, 1959

Claims (1)

1. A DIE-CASTING MACHINE FOR THE PRODUCTION OF MOLDED BODIES, PARTICULARLY FROM THERMO-PLASTIC SYNTHETIC SUBSTANCES, COMPRISING: A STATIONARY MOLD-CARRIER PLATE, ADAPTED TO CARRY ONE MOLD MEMBER, A MOVABLE MOLD-CARRIER PLATE, ALSO ADAPTED TO CARRY ONE MOLD MEMBER, CYLINDRICALLY BORED ANCHORING RODS EACH SECURED BY ONE END TO THE MOVABLE MOLD-CARRIER PLATE AND EACH EXTENDING INTO THE STATIONARY MOLD-CARRIER PLATE, MEANS FOR LOCKING THE ANCHORING RODS TO THE STATIONARY MOLD-CARRIER PLATE, SO AS TO HOLD THE MOLD MEMBERS IN THE CLOSED POSITION, PRESSURE PADS PROVIDED BETWEEN THE SAID LOCKING MEANS AND THE STATIONARY MOLD-CARRIER PLATE AND ADAPTED TO PRESS THE TWO MOLD MEMBERS AGAINST ONE ANOTHER WHEN THE ANCHORING RODS ARE LOCKED TO THE STATIONARY MOLD-CARRIER PLATE, GUIDING BARS FOR GUIDING THE MOVABLE MOLD-CARRIER PLATE, EACH EXTENDING THROUGH THE CYLINDRICAL BORE OF ONE OF THE ANCHORING RODS, AND EACH SUPPORTED AT ONE END BY THE STATIONARY MOLD-CARRIER PLATE, A STATIONARY CROSSPIECE SUPPORTING THE OTHER END OF EACH OF THE GUIDING BARS, PISTONS SECURED TO THE GUIDING BARS WITHIN THE CYLINDRICAL BORES OF THE ANCHORING RODS, STUFFING BOXES CLOSING THE ENDS OF THE HOLLOW ANCHORING RODS, AND MEANS FOR ADMITTING FLUID UNDER PRESSURE TO THE CYLINDRICAL BORES OF THE ANCHORING RODS ON EITHER SIDE OF THE PISTONS SO AS TO DISPLACE THE ANCHORING RODS, TOGETHER WITH THE MOVABLE MOLD-CARRIER PLATE AND THE MOLD MEMBER CARRIED THEREBY RELATIVELY TO THE GUIDE BARS, FOR THE PURPOSE OF OPENING AND CLOSING THE MOLD.
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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346925A (en) * 1964-12-15 1967-10-17 Maier Anton Locking devices for mould closing mechanism
US3353215A (en) * 1965-11-10 1967-11-21 Haller John Powdered material briquetting press
US3433290A (en) * 1965-01-29 1969-03-18 Buehler Ag Geb Pressure-type diecasting machine with screw threaded adjustment of mold halves
US3492696A (en) * 1967-08-14 1970-02-03 John Haller Precision power-moved die table for presses
US3508300A (en) * 1967-06-12 1970-04-28 Improved Machinery Inc Enclosed adjustable clamping mechanism with lubricating system
US3540081A (en) * 1967-08-21 1970-11-17 Us Industries Inc Vertical injection molding machine
US3543346A (en) * 1967-07-14 1970-12-01 Elastomer Ag Mould support units for injection-moulding machines
DE1529902B1 (en) * 1966-02-02 1971-01-07 Elastomer Ag Hydraulic locking and locking device for injection molds
US3642405A (en) * 1968-05-09 1972-02-15 Buehler Ag Geb Apparatus for controlling operation of a press
US3716323A (en) * 1971-12-14 1973-02-13 Mannesmann Meer Ag Injection molding machine
US3734673A (en) * 1970-04-04 1973-05-22 Metal Castings Doehler Ltd Die casting and like apparatus
US3756757A (en) * 1971-04-05 1973-09-04 Litton Industrial Products Tie bar sprocket mounting for injection-molding machine
US3966388A (en) * 1974-09-04 1976-06-29 Karl Hehl Tie rod connection for die closing unit of injection molding machine
US3975133A (en) * 1974-01-04 1976-08-17 Patent & Inventions Ltd. Closure mechanism for an injection molding machine or extrusion press
US4021181A (en) * 1974-04-23 1977-05-03 Karl Hehl Tie rod connection for die closing unit of injection molding machine
US4105390A (en) * 1976-05-25 1978-08-08 Karl Hehl Die closing unit with plate adjustment mechanism for injection molding machine
US4106885A (en) * 1976-03-31 1978-08-15 Pierre Poncet Hydraulic moulding presses
US4240781A (en) * 1978-12-18 1980-12-23 Hpm Corporation Injection molding machine having dual tonnage traversing cylinder
US4255113A (en) * 1980-02-05 1981-03-10 Hitachi, Ltd. Fluid-operated press
US4304540A (en) * 1980-09-15 1981-12-08 Hammon Carl K Hydraulic press
US4312828A (en) * 1978-12-18 1982-01-26 Hpm Corporation Method for opening die sections
USRE32048E (en) * 1979-01-11 1985-12-17 Prince Corporation Tie bar adjustment system
US5338171A (en) * 1991-04-17 1994-08-16 Kabushiki Kaisha Komatsu Seisakusho Die-clamping apparatus with aligning device
US6241509B1 (en) * 1998-04-30 2001-06-05 Husky Injection Molding Systems Ltd. Tiebar structure for injection molding machine
US20080187771A1 (en) * 2007-02-05 2008-08-07 Husky Injection Molding Systems Ltd. Molding-System Clamp
US20090136607A1 (en) * 2006-06-05 2009-05-28 Zhengzhou Synthetic Diamond And Related Products E Outer frame for cubic hinge press and the cubic hinge press with this outer frame
US8739697B1 (en) 2009-10-29 2014-06-03 Us Synthetic Corporation High pressure press with tensioning assembly and related methods
US10608501B2 (en) 2017-05-24 2020-03-31 Black & Decker Inc. Variable-speed input unit having segmented pads for a power tool
US11534999B1 (en) 2009-10-29 2022-12-27 Us Synthetic Corporation Reinforced press base, strengthening ring, and method of reinforcing a press base

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US2526803A (en) * 1947-01-25 1950-10-24 Wickes Brothers Die closing mechanism
US2862238A (en) * 1955-05-12 1958-12-02 Cuzzi Alberto Injection molding machines
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526803A (en) * 1947-01-25 1950-10-24 Wickes Brothers Die closing mechanism
US2916768A (en) * 1955-03-19 1959-12-15 Ind V H V Lohuizen & Co Nv Locking device for injection molding machines
US2862238A (en) * 1955-05-12 1958-12-02 Cuzzi Alberto Injection molding machines

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346925A (en) * 1964-12-15 1967-10-17 Maier Anton Locking devices for mould closing mechanism
US3433290A (en) * 1965-01-29 1969-03-18 Buehler Ag Geb Pressure-type diecasting machine with screw threaded adjustment of mold halves
US3353215A (en) * 1965-11-10 1967-11-21 Haller John Powdered material briquetting press
DE1529902B1 (en) * 1966-02-02 1971-01-07 Elastomer Ag Hydraulic locking and locking device for injection molds
US3508300A (en) * 1967-06-12 1970-04-28 Improved Machinery Inc Enclosed adjustable clamping mechanism with lubricating system
US3543346A (en) * 1967-07-14 1970-12-01 Elastomer Ag Mould support units for injection-moulding machines
US3492696A (en) * 1967-08-14 1970-02-03 John Haller Precision power-moved die table for presses
US3540081A (en) * 1967-08-21 1970-11-17 Us Industries Inc Vertical injection molding machine
US3642405A (en) * 1968-05-09 1972-02-15 Buehler Ag Geb Apparatus for controlling operation of a press
US3734673A (en) * 1970-04-04 1973-05-22 Metal Castings Doehler Ltd Die casting and like apparatus
US3756757A (en) * 1971-04-05 1973-09-04 Litton Industrial Products Tie bar sprocket mounting for injection-molding machine
US3716323A (en) * 1971-12-14 1973-02-13 Mannesmann Meer Ag Injection molding machine
US3975133A (en) * 1974-01-04 1976-08-17 Patent & Inventions Ltd. Closure mechanism for an injection molding machine or extrusion press
US4021181A (en) * 1974-04-23 1977-05-03 Karl Hehl Tie rod connection for die closing unit of injection molding machine
US3966388A (en) * 1974-09-04 1976-06-29 Karl Hehl Tie rod connection for die closing unit of injection molding machine
US4106885A (en) * 1976-03-31 1978-08-15 Pierre Poncet Hydraulic moulding presses
US4105390A (en) * 1976-05-25 1978-08-08 Karl Hehl Die closing unit with plate adjustment mechanism for injection molding machine
US4312828A (en) * 1978-12-18 1982-01-26 Hpm Corporation Method for opening die sections
US4240781A (en) * 1978-12-18 1980-12-23 Hpm Corporation Injection molding machine having dual tonnage traversing cylinder
USRE32048E (en) * 1979-01-11 1985-12-17 Prince Corporation Tie bar adjustment system
US4255113A (en) * 1980-02-05 1981-03-10 Hitachi, Ltd. Fluid-operated press
US4304540A (en) * 1980-09-15 1981-12-08 Hammon Carl K Hydraulic press
US5338171A (en) * 1991-04-17 1994-08-16 Kabushiki Kaisha Komatsu Seisakusho Die-clamping apparatus with aligning device
US6241509B1 (en) * 1998-04-30 2001-06-05 Husky Injection Molding Systems Ltd. Tiebar structure for injection molding machine
US20090136607A1 (en) * 2006-06-05 2009-05-28 Zhengzhou Synthetic Diamond And Related Products E Outer frame for cubic hinge press and the cubic hinge press with this outer frame
US7819648B2 (en) * 2006-06-05 2010-10-26 Zhengzhou Synthetic Diamond And Related Products Engineering Technology Research Center Outer frame for cubic hinge press and the cubic hinge press with this outer frame
US20080187771A1 (en) * 2007-02-05 2008-08-07 Husky Injection Molding Systems Ltd. Molding-System Clamp
US7611346B2 (en) * 2007-02-05 2009-11-03 Husky Injection Molding Systems Ltd. Molding-system clamp
US8739697B1 (en) 2009-10-29 2014-06-03 Us Synthetic Corporation High pressure press with tensioning assembly and related methods
US8850971B1 (en) 2009-10-29 2014-10-07 Us Synthetic Corporation Reinforced press base, strengthening ring, and method of reinforcing a press base
US8857328B1 (en) 2009-10-29 2014-10-14 Us Synthetic Corporation High pressure press and method of making the same
US8910568B1 (en) 2009-10-29 2014-12-16 Us Synthetic Corporation Reinforced press base, piston cavity sleeve, and method of reinforcing a press base
US10150270B1 (en) 2009-10-29 2018-12-11 Us Synthetic Corporation High pressure press and method of making the same
US10195700B1 (en) * 2009-10-29 2019-02-05 Us Synthetic Corporation High pressure press with tensioning assembly and related methods
US10220586B1 (en) 2009-10-29 2019-03-05 Us Synthetic Corporation Reinforced press base, strengthening ring, and method of reinforcing a press base
US10414113B1 (en) 2009-10-29 2019-09-17 Us Synthetic Corporation Reinforced press base, piston cavity sleeve, and method of reinforcing a press base
US11524473B1 (en) 2009-10-29 2022-12-13 Us Synthetic Corporation Reinforced press base, piston cavity sleeve, and method of reinforcing a press base
US11534999B1 (en) 2009-10-29 2022-12-27 Us Synthetic Corporation Reinforced press base, strengthening ring, and method of reinforcing a press base
US11858230B1 (en) 2009-10-29 2024-01-02 Us Synthetic Corporation High pressure press and method of making the same
US11878485B1 (en) 2009-10-29 2024-01-23 Us Synthetic Corporation Reinforced press base, strengthening ring, and method of reinforcing a press base
US10608501B2 (en) 2017-05-24 2020-03-31 Black & Decker Inc. Variable-speed input unit having segmented pads for a power tool

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