GB1601419A - Mould closing and locking arrangement for injection moulding machines - Google Patents
Mould closing and locking arrangement for injection moulding machines Download PDFInfo
- Publication number
- GB1601419A GB1601419A GB18654/78A GB1865478A GB1601419A GB 1601419 A GB1601419 A GB 1601419A GB 18654/78 A GB18654/78 A GB 18654/78A GB 1865478 A GB1865478 A GB 1865478A GB 1601419 A GB1601419 A GB 1601419A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- platen
- closing
- clamping
- locking
- 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
Links
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
- B29C45/64—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/26—Mechanisms or devices for locking or opening dies
-
- 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
-
- 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
-
- 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
- B29C2045/6735—Rotatable means coaxial with the coupling rod for locking the coupling rod to the mould platen
-
- 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
- B29C2045/675—Rotatable means coaxial with the tie rod for locking the movable platen to the tie rod, e.g. bayonet couplings using teeth or splines interrupted by longitudinal grooves
Description
(54) A MOULD CLOSING AND LOCKING ARRANGEMENT
FOR INJECTION MOULDING MACHINES
(71) We, VEB KOMBINAT UNIFORM
TECHNIK "HERBERT WARNKE" ERFURT, 50
Erfurt, Schwerborner Strasse 1, German
Democratic Republic, a Corporation organised under the laws of the German Democratic Republic, 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:- This invention relates to a mould closing and locking arrangement for an injection moulding machine for processing of plastics and elastomers, and the term injection moulding machines is intended to include machines for pressure casting of metals.
The invention relates specifically to a mould closing and locking arrangement in an injection moulding machine having two mould mounting platens, one of which is guided on the machine bed movably with respect to the other in the closing and opening direction of the mould, with a working mechanism comprising working cylinder/piston units by means of which the bringing together and separation of the two mould mounting platens is effected with a locking device which causes the two mould mounting platens to be clamped together in the closed position and with an apparatus to generate the closing and clamping force.
It is known that in injection moulding machines a phase separation is made between bringing the mould mounting platens together into the closed position, subsequent locking, and the generation of the closing and clamping force. The bringing of the mould mounting platens together into the closed position is effected by relatively longstroke cylinder piston units which are actuated by low pressure. The locking of the two mould mounting platens in the closed position is effected by separate working mechanisms. The closing and clamping force is then realised by short-stroke high-pressure cylinder/piston units. In every case the locking system effects a limitation of the flow of force when the closing and clamping force is exerted and a connection with the forcetransmitting elements and with the shortstroke cylinder/piston units to generate the closing and clamping force.
Mould closing and mould clamping devices in an injection moulding machine are known from German Federal Patent 1 245 105 and from German Democratic Republic
Patent 122 667, where columns are arranged self-supportingly on a machine bearing acting as a stationary mould support platen. In the closed position the mould support platens are locked mutually by separate locking mechanisms. This occurs in the Patent 1 245 105 by means of bushes which have annular segment-shaped inner dogs. The mould support platens are locked in that the bushes are controlled by piston rods, each of which belongs to a hydraulic cylinder. The head of the hydraulic cylinder is arranged pivotably about a pin so that the piston rod can follow the arc along which the strap of the bush moves. In the Patent 122 667, locking slides driven by means of a piston-cylinder system are arranged on the movable mould mounting platen in order to realise the closing and clamping force and the previous locking associated therewith. The columns arranged on the stationary mould mounting platen are brought into conjunction with the movable mould mounting platen on the machine bed via a sliding path in such a way that they become positively but releasably locked by locking elements engaging into the annular groove of the respective columns. The locking slides are actuated in the vertical direction by four separately arranged pistoncylinder systems for the purpose of locking with the column ends provided with a counterprofile.
A mould closing arrangement is known from German Democratic Patent 79 378 having columns extending continuously along the total length of the mould closing arrangement, which are mounted in a supporting platen and in the fixed mould mounting platen. The locking mechanism is constituted by an adjusting nut provided with a collar and connected to the columns, which is a stroke limiting and guiding means for the locking elements during the generation of the closing force, by a pair of locking elements, a guide housing and a sleeve connecting each of the locking device and mould vertical adjustment device to the movable ejectionside mould mounting platen and contactlessly surrounding the column. The locking of the columns to the movable ejection-side mould mounting platen occurs by means of an adjusting nut provided with a collar and driven by the mould vertical adjustment drive and by locking elements engaging therein.
An injection moulding machine of the same effective principle is known from Federal German Patent 1 230 554, where separate actuation means are likewise necessary for the locking process. In this case the locking of the columns is effected by the movable ejection-side mould mounting platen through pairs of clamping jaws actuated by piston-cylinder systems. The pairs of clamping jaws engage into turned grooves of the columns and lock the latter to the movable mould mounting platen.
All the above-mentioned locking system suffer from the following common disadvantages. The use of additional actuating means for the locking operation, such as pistoncylinder systems, or mechanical drives by means of an electric motor, is necessary. This results in an increased outlay for the drive and control systems of the locking slides and hence an increased proneness to faults on the part of the locking mechanisms. Furthermore, the work phases of bringing the mould mounting platens together into the closed position and the subsequent locking, and the reverse process, occur non-synchronously.
This is due to the fact that the abovementioned work phases occur in different work planes (horizontal, vertical). This results in a chornological separation of phases and hence an additional increase in the control and actuation time and hence a longer overall stroke time of the machine.
It is an object of the invention, by reducing the technical outlay, to provide a mould closing arrangement in an injection moulding machine with locking elements constructed in such a way that a reduction of the control and actuation time and consequently a reduction in the overall stroke time of the injection moulding machine is achieved.
Thus the invention aims, in an injection moulding machine, to conform the mould closing arrangement in such a way that the elements which generate and transmit the closing force constitute a functional unit, the closing and locking operation and the unlocking and opening operation occurs in one work phase synchronously for both the mould mounting plates by one actuating element, and a continuous transition to the build-up of the closing and clamping force can occur after the locking.
Accordingly, the present invention consists in a mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each cooperating with one end of a respective force transmitting column passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted rotatably in a supporting platen and anchored therein against relative axial displacement by securing means, rings are arranged fixed in the movable mould mounting platen, each ring has inner dogs which co-operate with a bush arranged fixed on the respective column, each said bush is provided with a double collar on the mould side, the collar has recesses through which the inner dogs pass during the mould closing operation, and that follower pins are arranged in the fixed mould mounting platen which slide in cam tracks of a respective column and which facilitate axial movement of the column by the length of the closing stroke and rotary movement through an angle of rotation to lock outer dogs on said collar with the inner dogs on the respective ring.
The present invention also consists in a mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each adapted to co-operate via a clamping bush with one end of a respective force transmitting column, passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted axially adjustably and rotationally fast in the movable platen, has at its end which enters the stationary platen outer dogs which engage during the closing process the respective clamping bush, each clamping bush has internally axially extending grooves which are interrupted by annular channels whereby inner dogs are formed, cam tracks in which follower pins slide are arranged at the outer periphery of the clamping bush so that the clamping bush is movable axially by the length of the closing stroke and rotates through an angle of rotation to lock the outer dogs on the column with the inner dogs in the clamping bush.
The cam tracks machined on the surface of the columns or on the periphery of the clamping bushes advantageously comprise an axially extending portion and an immediately adjoining obliquely extending portion.
In order that the invention may be more readily understood, reference is made to the accompanying drawings which illustrate diagrammatically and by way of example embodiments thereof, and in which: Fig. 1 shows a mould closing arrangement with columns mounted in an additional supporting platen;
Fig. 2 shows a sectional view of the functional elements on the line B-B of Fig.
1;
Fig. 3 is a sectional view on the line C-C of Fig. 2;
Fig. 4 shows a mould closing arrangement with two mould mounting platens and selfsupporting mounted columns;
Fig. 5 shows a sectional view of the functional elements on the line A-A of Fig.
4;
Fig. 6 is an end view in the direction of arrow Y of Fig. 5; and
Fig. 7 is an end view in the direction of arrow Z of Fig. 5.
Figures 1, 2 and 3 show an embodiment of the invention constructed with columns 5 supported in an additional supporting platen 22. A movable mould part mounting platen 2 is arranged for sliding movement on a base frame I by means of traverse cylinders 4. The columns 5 are mounted rotatably in the platen 22 and are secured against axial displacement by securing rings. The columns 5 project into a stationary mould part mounting platen 3 adjacent the injection nozzle (not shown), where they are mounted with positive guidance to form a functional unit with closing pistons 12. On each of the columns 5 there is arranged a bush 23, the axial position of which can be adjusted in conformity with the required mould part installation spacing by means of nuts 25. The bushes 23 are rotationally fast with the columns 5 by means of studs 32 slidable axially in column grooves 26. The ends of the bushes 23 which face the stationary mounting platen 3 have two spaced apart collars 24, 29. The collars 24 have outer dogs 11 constructed in the shape of an annular segment and the collars 29 have a plane parallel annular surface provided with an impact plate 28.
To the surface of the movable mould part mounting platen 2 facing away from the mould, are fixed, adjacent the passage orifices for the columns 5, rings 27 having annular segment-shaped inner dogs 6.
The annular segment-shaped inner dogs 6 are so constructed that they can pass without obstruction through correspondingly shaped recesses 30 in the collars 24, between which the annular segment-shaped outer dogs 11 are arranged. The columns 5 which produce the mould locking operation are mounted with positive guidance in the stationary mould part mounting platen 3. Cam tracks 16 machined on the columns 5, and follower pins 17 in engagement therewith and mounted in the platen 3, determine the angle of rotation of the positively guided locking elements with simultaneous axial movement in the mould closing direction (arrow D) and vice versa.
The cam tracks 16 include a portion 8 arranged obliquely with reference to the closing direction in order to effect the rotary movement during the locking and unlocking operation. The oblique portion 8 is adjoined by a portion 7 parallel to the closing direction necessary for the closing and release stroke.
Sealing elements 21 between the columns 5 and the fixed mould part mounting platen 3 for sealing with reference to a pressure medium 15 in a closing cylinder 31 are arranged in the platen 3 facing the mould in front of the portion 7 of the cam tracks 16 terminating axially on the columns 5.
The mode of operation of the embodiment of the invention according to Figs. 1, 2 and 3 is explained briefly hereinbelow. In the open position of the mould (Fig. 1) for the purpose of removing the mouldings, the movable part mounting platen 2 and the stationary mould part mounting platen 3 have a maximum possible mutual spacing. If it is now required to close the mould 33 again for a further injection moulding operation, then pressure is applied to the traverse cylinders 4, such that the platen 2 moves in the closing direction D, i.e. towards the platen 3. The inner dogs 6 on the ring 27 attached firmly to the platen 2 then penetrate recesses 30 of the collar 24 until they come into contact with the impact plate 28 of the collar 29 with their end face. The translatory movement generated by the traverse cylinders 4 and by the movable platen 2 connected thereto is then transmitted to the bushes 23 and hence to the columns 5.
The columns 5 are guided positively in the stationary mounting platen 3, the fixed anchored pins 17 in conjunction with cam tracks 16 machined on the columns 5 causing a rotation of the columns 5 about their axes, through an angle predetermined by the conformation of the cam tracks 16, with simultaneous axial movement. The inner dogs 6 and the outer dogs 11 then come into mutual abutment, whereby the mounting platen 2 becomes positively locked to the fixed mounting platen 3 in a single work phase occurring in one direction. This means that no additional working mechanisms are necessary for the locking operation because the work phase of locking is produced simultaneously by the working mechanism of the traverse cylinders 4 moving in translation in bringing together the movable mounting platen 2 into the closed position. The realisation of the bringing together of the movable mounting platen 2 into the closed position and the simultaneous locking permit, in this case, the columns 5 guided positively and functioning as locking elements in the case of a superimposition of rotary and translatory movement.
After this positive locking the two mould mounting platens are closed except for a short spacing corresponding to the release stroke. Now, after the locking, without interruption, a slight build-up of pressure occurs on one side of the piston 12 in the closing cylinders 31 and the two mould parts 33 are closed completely in a dampened manner by the closing pistons 12 forming a functional unit with the columns 5, in order to be held together subsequently with the necessary clamping force by a high build-up of pressure in the closing cylinder 31.
After the injection moulding operation and the cooling of the moulding, pressure is applied in known manner to the other side of the pistons 12 in the closing cylinders 31 until the two mould parts 33 have been mutually separated correspondingly to the release stroke. During this closing stroke and the release stroke the pins 17 slide in the axially extending portion 7 of the cam tracks 16. The complete opening of the mould closing unit now occurs, after previous unlocking, likewise without interruption by the traverse cylinders 4 for the purpose of removing the moulding.
Figures 4, 5, 6, 7 illustrate an embodiment of the invention with a 2-platen closing unit having columns mounted at one end.
The movable mould part mounting platen 2' is slid on the base frame 1' by means of the traverse cylinders 4'. In the movable mounting platen 2', the columns 5' constructed as clamping bolts are arranged adjustably in the longitudinal direction by means of nuts 25' for the purpose of adaptation to the mould parts installation spacing. The columns 5' constructed as clamping bolts have annular segment-shaped outer dogs 6' suitable for rotary coupling at their ends facing the mounting platen 3'. The columns 5' are secured against rotation by a key 24 which is slidable axially in a groove 35 of a bush 34.
The bush 34 is firmly attached to the movable mounting platen 2'. Clamping bushes 9 which facilitate the locking operation are mounted for positive guidance in the stationary mounting platen 3'. The bushes 9 have grooves 10 extending axially inwards which are interrupted by annular channels 18. Inner dogs 11' are thereby formed in the bushes 9. Cam tracks 16' which are associated with the follower pins 17' anchored in the stationary mounting platen 3' are machined on the outer periphery of the clamping bushes 9.
The cam tracks 16' include an axially extending portion 7' and an adjoining obliquely extending portion 8'. In order to ensure a transmission of movement from the movable mounting platen 2' to the clamping bushes 9, the bushes 9 have externally end faces 14 which are associated with the annular surfaces 13 of the columns 5' or have internally end faces 20 which are associated with the end faces 19 of the columns 5'.
Sealing elements 21' between the bushes 9 and the fixed mounting platen 3' for sealing with respect to pressure medium 15' of a clamping cylinder 31' are arranged in front of the axially terminating portion 7' of the guide tracks 16' on the mould side. This has the advantage that the guide tracks 16' for the pins 17' are lubricated by all the incident leakage oil. The clamping bushes 9 and the clamping pistons 12' jointly constitute an operational unit.
The mode of operation of this embodiment is explained briefly hereinbelow.
In the open position for the purpose of removing the mouldings, the movable mounting platen 2' and the stationary mounting platen 3' have a maximum possible mutual spacing. If it is now required to close the mould 33' again for a further injection moulding operation, then the traverse cylinder 4' are pressurised, so that the mounting platen 2' with the columns 5' secured thereto moves towards the stationary mounting platen 3'. The annular segmentshaped outer dogs 6' arranged on the ends of the columns 5' which engage into the stationary mounting platen 3' then penetrate into the clamping bushes 9.
The outer dogs 6' then move along the grooves 10 extending axially in the bushes 9.
Each bush 9 is mounted with positive guidance in the fixed mounting platen 3' by means of the cam track 16' arranged on the outer periphery and of the pin 17' engaging therein and is rotationally slidable through an angle of rotation predetermined by the conformation of the cam tracks 16' with simultaneous axial movement. The outer dogs 6' penetrate into the bushes 9 during the traverse stroke into the closed position until the annular surfaces 13 of the columns 5' strike against the outer end faces 14 of the bushes 9 or the end faces 19 of the columns 5' strike against the inner end faces 20 of the bushes 9. The translatory movement generated by the traverse cylinders 4' and by the movable mounting platen 2' connected thereto is now transmitted to the bushes 9 mounted with positive guidance. The bushes 9 now move about their axes through the angle of rotation for locking the outer dogs 6' with the inner dogs 11', whilst the pins 17' slide in the obliquely extending portion 8 of the cam tracks 16'. The mounting platen 2' is thus positively locked to the fixed mounting platen 3' in one work phase synchronously with the traverse stroke into the closed position. This means that no additional working mechanism are required for the locking operation because the work phase of locking is produced by the working mechanism of the traverse cylinders 4' moving in translation during the bringing together of the movable mounting platen 2' into the closed position. The bringing of the movable mounting platen 2' into the closed position and the simultaneous locking of the mould are made possible in this case by the positively guided clamping bushes 9 functioning as locking elements with a superimposition of rotary and translatory movement. After this positive locking of the two mould mounting platens 2', 3', the two mould halves 33' are closed except for a short spacing corresponding to the release stroke. Now after the locking in a continuous operation, a slight build-up of pressure occurs immediately in the clamping cylinder 31' on one side of the pistons 12' and the two mould halves 33' are completely closed in a dampened manner by the pistons 12' forming an operational unit with the bushes 9, in order subsequently to be held together with the necessary clamping force by the high pressure build-up in the clamping cylinders 31'.
After the injection operation and the cooling of the moulding, pressure is applied in known manner on the opposite side of the pistons 12' in the cylinders 31' until the two mould halves 33' have separated correspondingly to the release stroke.
During the clamping stroke and the release stroke the pins 17' slide in the axially extending portions 7' of the cam tracks 16' arranged on the bushes 9. The complete opening of the mould now occurs after previous unlocking, likewise in a continuous operation, counter to the closed position by the traverse cylinders 4' for the purpose of removing the mouldings.
WHAT WE CLAIM IS:
1. A mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each co-operating with one end of a respective force transmitting column passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted rotatably in a supporting platen and anchored therein against relative axial displacement by securing means, rings are arranged fixed in the movable mould mounting platen, each ring has inner dogs which co-operate with a bush arranged fixed on the respective column, each said bush is provided with a double collar on the mould side, the collar has recesses through which the inner dogs pass during the mould closing operation, and that follower pins are arranged in the fixed mould mounting platen which slide in cam tracks of a respective column and which facilitate axial movement of the column by the length of the closing stroke and rotary movement through an angle of rotation to lock outer dogs on said collar with the inner dogs on the respective ring.
2. A mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each adapted to co-operate via a clamping bush with one end of a respective force transmitting column, passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted axially adjustably and rotationally fast in the movable platen, has at its end which enters the stationary platen outer dogs which engage during the closing process the respective clamping bush, each clamping bush has internally axially extending grooves which are interrupted by annular channels whereby inner dogs are formed, cam tracks in which follower pins slide are arranged at the outer periphery of the clamping bush so that the clamping bush is movable axially by the length of the closing stroke and rotates through an angle of rotation to lock the outer dogs on the column with the inner dogs in the clamping bush.
3. A mould closing and locking arrange
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (7)
1. A mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each co-operating with one end of a respective force transmitting column passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted rotatably in a supporting platen and anchored therein against relative axial displacement by securing means, rings are arranged fixed in the movable mould mounting platen, each ring has inner dogs which co-operate with a bush arranged fixed on the respective column, each said bush is provided with a double collar on the mould side, the collar has recesses through which the inner dogs pass during the mould closing operation, and that follower pins are arranged in the fixed mould mounting platen which slide in cam tracks of a respective column and which facilitate axial movement of the column by the length of the closing stroke and rotary movement through an angle of rotation to lock outer dogs on said collar with the inner dogs on the respective ring.
2. A mould closing and locking arrangement for injection moulding machines, comprising two mould mounting platens of which one is fixed and the other is movable in relation to said one platen in the closing and opening direction of the mould, hydraulically actuated cylinder/piston units for moving said other platen towards and away from said one platen, and closing cylinder/piston units arranged in the fixed platen and each adapted to co-operate via a clamping bush with one end of a respective force transmitting column, passing through the movable platen, for producing mould closing and clamping force after traverse of the movable platen towards the fixed platen, characterised in that each said column is mounted axially adjustably and rotationally fast in the movable platen, has at its end which enters the stationary platen outer dogs which engage during the closing process the respective clamping bush, each clamping bush has internally axially extending grooves which are interrupted by annular channels whereby inner dogs are formed, cam tracks in which follower pins slide are arranged at the outer periphery of the clamping bush so that the clamping bush is movable axially by the length of the closing stroke and rotates through an angle of rotation to lock the outer dogs on the column with the inner dogs in the clamping bush.
3. A mould closing and locking arrange
ment as claimed in claim 1 or 2, wherein each cam track comprises an axially extending portion and an adjoining obliquely extending portion.
4. A mould closing and locking arrangement as claimed in claim 1. wherein the outer dogs are arranged on the collar between the recesses and are of annular segment-shaped construction and the adjacent collar part has a plane parallel annular surface on which an impact plate is fitted.
5. A mould closing and locking arrangement as claimed in claim 2. wherein the external end faces of the clamping bushes are associated with annular surfaces of the columns or the internal end faces of the clamping bushes are associated with the end faces of the columns.
6. A mould closing and locking arrangement as claimed in claim 3, wherein sealing elements are arranged on the columns or on the clamping bushes in front of the axially extending portions of the cam tracks adjacent the mould.
7. A mould closing and locking arrangement, substantially as herein described with reference to and as shown in Figs. I to 3 or
Figs. 4 to 7 of the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD19884877A DD132944A1 (en) | 1977-05-10 | 1977-05-10 | TOOL CLOSURE AND LOCKING UNIT IN PARTICULAR FOR INJECTION MOLDING MACHINES |
| DD19896377A DD133635A1 (en) | 1977-05-17 | 1977-05-17 | TOOL CLOSURE AND LOCKING UNIT IN PARTICULAR FOR INJECTION MOLDING MACHINES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1601419A true GB1601419A (en) | 1981-10-28 |
Family
ID=25747587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18654/78A Expired GB1601419A (en) | 1977-05-10 | 1978-05-10 | Mould closing and locking arrangement for injection moulding machines |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2812301A1 (en) |
| FR (1) | FR2390271A1 (en) |
| GB (1) | GB1601419A (en) |
| SE (1) | SE424704B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989002357A1 (en) * | 1987-09-08 | 1989-03-23 | Ray Alexander Nattrass | Improved die press |
| GB2218035A (en) * | 1988-05-06 | 1989-11-08 | Adelio Grasselli | Injection moulding press |
| EP0942821A1 (en) * | 1996-11-06 | 1999-09-22 | Husky Injection Molding Systems Ltd. | High speed locking clamp |
| WO2001032387A1 (en) * | 1999-10-28 | 2001-05-10 | Polimate - S.R.L. | A molding machine por polystyrene elements with mechanical locking system of molds |
| EP1354689A1 (en) * | 2002-04-18 | 2003-10-22 | Sandretto Industrie S.P.A. | Hydraulic clamping device for moulding machines |
| WO2008095282A1 (en) | 2007-02-05 | 2008-08-14 | Husky Injection Molding Systems Ltd. | Molding-system clamp |
| US7670536B2 (en) | 2007-02-05 | 2010-03-02 | Husky Injection Moding Systems Ltd. | Molding-system clamp |
| WO2010037236A1 (en) | 2008-10-03 | 2010-04-08 | Athena Automation Ltd. | Locking device for an injection molding machine |
| CN109591054A (en) * | 2018-12-06 | 2019-04-09 | 西安法士特汽车传动有限公司 | A kind of gripping apparatus self-locking mechanism |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD146405A1 (en) * | 1979-11-13 | 1981-02-11 | Lothar Elsner | METHOD AND HYDRAULIC CIRCUIT ARRANGEMENT FOR INJECTION MOLDING |
| DE3448497C2 (en) * | 1984-05-08 | 1997-05-22 | Mauser Werke Gmbh | Blow molding machine |
| DE3440476A1 (en) * | 1984-11-06 | 1986-07-10 | Mauser-Werke GmbH, 5040 Brühl | MOLDING LOCKING DEVICE |
| CH669146A5 (en) * | 1986-03-14 | 1989-02-28 | Netstal Ag Maschf Giesserei | PLASTIC INJECTION MOLDING MACHINE. |
| CA2177950C (en) * | 1995-06-07 | 2000-01-25 | Pierre Glaesener | Injection molding machine with associated securing/clamping assembly and related control system and method |
| US5753153A (en) * | 1996-01-02 | 1998-05-19 | Husky Injection Molding Systems Ltd. | Method for mold clamping units |
| US5645875A (en) * | 1995-06-07 | 1997-07-08 | Husky Injection Molding Systems Ltd. | Securing/clamping assembly for injection molding machines |
| LU88622A1 (en) | 1995-06-12 | 1997-01-03 | Wurth Paul Sa | Closing unit for an injection molding machine |
| LU88623A1 (en) | 1995-06-12 | 1997-01-03 | Wurth Paul Sa | Closing unit for an injection molding machine |
| DE19719870A1 (en) * | 1997-05-12 | 1998-11-19 | Hemscheidt Maschinentechnik Gm | Closing unit for a plastic injection molding machine |
| US6334768B1 (en) | 1999-08-11 | 2002-01-01 | Husky Injection Molding Systems Ltd. | Blow molding clamp arrangement |
| DE10101138B4 (en) | 2001-01-12 | 2007-06-14 | Adcuram Maschinenbauholding Gmbh | Lock for a pillar |
| DE20114535U1 (en) * | 2001-09-03 | 2002-01-24 | Battenfeld Gmbh | Lock for one column |
| DE102016119840A1 (en) | 2016-10-18 | 2018-04-19 | Arburg Gmbh + Co Kg | Mold-closing unit with a mold height adjustment and method for their operation |
| DE102018124608A1 (en) | 2018-10-05 | 2020-04-09 | Arburg Gmbh + Co Kg | Mold clamping unit for an injection molding machine and method for locking a force transmission element |
| AT521266B1 (en) | 2018-10-09 | 2019-12-15 | Engel Austria Gmbh | Closing unit for a molding machine |
-
1978
- 1978-03-21 DE DE19782812301 patent/DE2812301A1/en not_active Ceased
- 1978-04-26 FR FR7812423A patent/FR2390271A1/en active Granted
- 1978-05-09 SE SE7805293A patent/SE424704B/en unknown
- 1978-05-10 GB GB18654/78A patent/GB1601419A/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989002357A1 (en) * | 1987-09-08 | 1989-03-23 | Ray Alexander Nattrass | Improved die press |
| GB2218035A (en) * | 1988-05-06 | 1989-11-08 | Adelio Grasselli | Injection moulding press |
| GB2218035B (en) * | 1988-05-06 | 1992-08-05 | Adelio Grasselli | Injection moulding press |
| EP0942821A1 (en) * | 1996-11-06 | 1999-09-22 | Husky Injection Molding Systems Ltd. | High speed locking clamp |
| EP0942821A4 (en) * | 1996-11-06 | 2001-07-11 | Husky Injection Molding | High speed locking clamp |
| WO2001032387A1 (en) * | 1999-10-28 | 2001-05-10 | Polimate - S.R.L. | A molding machine por polystyrene elements with mechanical locking system of molds |
| EP1354689A1 (en) * | 2002-04-18 | 2003-10-22 | Sandretto Industrie S.P.A. | Hydraulic clamping device for moulding machines |
| US6945765B2 (en) | 2002-04-18 | 2005-09-20 | Sandretto Industrie S.P.A. | Hydraulic clamping device for molding machines |
| WO2008095282A1 (en) | 2007-02-05 | 2008-08-14 | Husky Injection Molding Systems Ltd. | Molding-system clamp |
| US7611346B2 (en) | 2007-02-05 | 2009-11-03 | Husky Injection Molding Systems Ltd. | Molding-system clamp |
| US7670536B2 (en) | 2007-02-05 | 2010-03-02 | Husky Injection Moding Systems Ltd. | Molding-system clamp |
| WO2010037236A1 (en) | 2008-10-03 | 2010-04-08 | Athena Automation Ltd. | Locking device for an injection molding machine |
| US8337196B2 (en) | 2008-10-03 | 2012-12-25 | Athena Automation Ltd. | Locking device for an injection molding machine |
| CN109591054A (en) * | 2018-12-06 | 2019-04-09 | 西安法士特汽车传动有限公司 | A kind of gripping apparatus self-locking mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2390271B3 (en) | 1980-12-19 |
| DE2812301A1 (en) | 1978-11-23 |
| SE424704B (en) | 1982-08-09 |
| FR2390271A1 (en) | 1978-12-08 |
| SE7805293L (en) | 1978-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1601419A (en) | Mould closing and locking arrangement for injection moulding machines | |
| US4473346A (en) | Mechanism for the attachment of interchangeable molds in an injection molding machine | |
| US3093863A (en) | Die-casting or injection-moulding machines | |
| EP2117803B1 (en) | Molding-system clamp | |
| GB1340556A (en) | Devices for closing locking and pretensioning moulds | |
| US9333691B2 (en) | High speed clamp system for an injection molding machine | |
| GB2064415A (en) | Mould Closing and Locking Arrangement | |
| EP0976521B1 (en) | Clamp system and method | |
| GB1166081A (en) | Improvements in or relating to Injection Moulding Machines | |
| EP2117802B1 (en) | Molding-system lock | |
| US20170252955A1 (en) | Compact clamp apparatus with integrated mold break | |
| US3810728A (en) | Injection molding machine | |
| EP0942821B1 (en) | High speed locking clamp | |
| EP2150389B1 (en) | Molding system having clamp actuator having actuator mount | |
| US5922372A (en) | High speed locking clamp | |
| CA2325456A1 (en) | Mold closing unit for an injection molding machine | |
| KR100304237B1 (en) | Tire Structure of Injection Molding Machine | |
| JP3917480B2 (en) | Mold clamping device and method of operating the same | |
| US20210046684A1 (en) | Compact clamp apparatus with integral high force mold break actuator | |
| US5018961A (en) | Hydraulic closing unit | |
| JPH0796250B2 (en) | Clamp mechanism and injection molding machine | |
| US5582059A (en) | Forging machine | |
| GB1489667A (en) | Mould clamping apparatus for moulding machinery | |
| DE3933348C2 (en) | ||
| EP1030768B1 (en) | Mold closure unit for an injection molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |