Quick mold change device for molding machine

Abstract

The present invention discloses a quick mold-changing device for a molding machine, which comprises: a mold, a pair of bolt grooves are longitudinally arranged on the side walls at both ends of the mold; a pair of fixing members, each of which is connected to a locking member on the outer side, each of which extends a locking bolt toward the corresponding bolt groove, and the top surface of each of the locking members is further provided with an unlocking groove; and an unlocking mechanism, which is installed on the top surface of the lifting seat and comprises at least a first telescopic driving device, and a pair of unlocking blades that are synchronously driven by the first telescopic driving device and whose positions correspond to the pair of unlocking grooves; when the pair of unlocking blades are inserted into the pair of unlocking grooves, the pair of locking members form a lateral displacement on the outer side of the pair of fixing members under the elastic action of the elastic displacement mechanism, so that each of the locking bolts is separated from the corresponding bolt groove to form unlocking of the mold.

Description

Technical Field

[0001] The invention relates to a rapid mold changing device, in particular to a rapid mold changing device for a molding machine, such as an injection molding machine or an injection bottle blowing machine. Background Art

[0002] Molding machines, such as injection molding machines or injection blow molding machines, are essential equipment for making plastic products. The above molding machines use molds to produce plastic products, so if you want to produce different styles of plastic products, you have to change different molds.

[0003] For example, the bottle mouth mold of an existing injection blow molding machine includes a workbench and a turntable disposed on the bottom of a lifting seat. The workbench and the lifting seat are provided with at least three workstations, such as an injection workstation, a bottle blowing workstation, and an ejection workstation. A mold clamping mechanism is provided at the bottom of the turntable corresponding to each of the workstations.

[0004] Each of the clamping mold mechanisms includes a pair of positioning pins connected to the bottom surface of the turntable at intervals; a bottle mouth mold composed of a first half mold and a second half mold, with a pair of pin holes formed by the first half mold and the second half mold being provided on both sides of the bottle mouth mold for the pair of positioning pins to penetrate and position; and a pair of fixing members locked to the bottom surface of the turntable, with the bottom of the pair of fixing members extending inwards in opposite directions to form a pair of supporting sheets for the two sides of the bottle mouth mold to span and fix, and the bottom surfaces of the pair of positioning pins abut against the corresponding supporting sheets. Therefore, at least three sets of clamping mold mechanisms are installed on the bottom surface of the turntable.

[0005] When replacing a bottle mouth film with a different caliber, first, at least one person supports a bottle mouth mold with a first caliber, while another person disassembles the pair of fixing parts so as to remove the bottle mouth mold with the first caliber; then, a bottle mouth mold with a second caliber is sleeved and positioned on the pair of positioning pins, and then the pair of fixing parts are locked with the turntable so as to straddle and fix the bottle mouth mold with the second caliber on the pair of fixing parts.

[0006] It can be seen from the above mold changing operation that the pair of fixing parts at each station need to go through the disassembly and locking process before replacing the new bottle mouth mold, and the mold changing operation requires at least two operators, which increases the waste of manpower and time consumption, which is a flaw in the ointment. Summary of the invention

[0007] The main purpose of the present invention is to provide a quick mold changing device for a molding machine, which is arranged at an operating station, such as an ejection station, so that the mold carried, such as a bottle mouth mold, can be quickly locked or unlocked to avoid the inconvenience of disassembling and assembling connecting parts, such as screws, thereby achieving the purpose of saving manpower and working time.

[0008] In order to achieve the above-mentioned purpose, the technical means adopted by the present invention is to provide a rapid mold-changing device for a molding machine, which is installed in a molding machine, and the molding machine includes a workbench, a lifting seat, and a turntable arranged at the bottom of the lifting seat and rising and falling synchronously, and the workbench and the lifting seat are provided with at least two operating stations in total; wherein the rapid mold-changing device includes: a mold corresponding to each of the operating stations, and a pair of bolt grooves are longitudinally arranged on the side walls at both ends of the mold; a pair of fixing members, which are installed on the bottom surface of the turntable, and the pair of fixing members extend a pair of supporting plates for the mold to be straddled and positioned; a locking member is connected to the outer side of each of the fixing members, and each of the locking members extends a locking bolt passing through the adjacent fixing member toward the corresponding bolt groove, and the top surface of each of the locking members is further provided with an unlocking groove; and each of the locking members is provided with a locking member toward the corresponding fixing member There is an elastic displacement mechanism; and an unlocking mechanism, which is installed on the top surface of the lifting seat and corresponds to one of the operating stations, the unlocking mechanism includes at least one first telescopic driving device, and a pair of unlocking blades that are synchronously driven by the first telescopic driving device and pass through the lifting seat and the turntable and whose positions correspond to the pair of unlocking grooves; when the pair of unlocking blades are inserted into the pair of unlocking grooves, the pair of locking members form a lateral displacement on the outer side of the pair of fixing members under the elastic action of the elastic displacement mechanism, so that each of the locking bolts is separated from the corresponding bolt groove to form unlocking of the mold; in addition, when the pair of unlocking blades are separated from the pair of unlocking grooves, the pair of locking members form another lateral displacement on the outer side of the pair of fixing members under the elastic action of the elastic displacement mechanism, so that each of the locking bolts is inserted into the corresponding bolt groove to form locking of the mold.

[0009] In one embodiment, the molding machine is a vertical injection blow molding machine, and the operating stations include an injection station for installing an injection mold on the workbench, a blowing station for installing a blowing mold, and an ejection station for installing an ejection mechanism on the lifting seat.

[0010] In one embodiment, the molding machine is a vertical injection molding machine, and the operating stations include an injection station disposed on the workbench for installing an injection mold, and an ejection station disposed on the lifting seat for installing an ejection mechanism.

[0011] In one embodiment, the unlocking mechanism is installed at the ejection station of the top surface of the lifting base.

[0012] In one embodiment, the mold is a bottle mouth mold.

[0013] In one embodiment, the bottle mouth mold includes a first half mold and a second half mold; at least one connecting rod is transversely arranged through the first half mold and the second half mold, and each of the connecting rods has a stepped through hole corresponding to each other, and a telescopic spring is further sleeved in each of the through holes on both sides of the connecting rod, and each of the two ends has an end seal; and a pair of top connecting grooves formed by the first half mold and the second half mold and inclined inwardly are longitudinally arranged at intervals on both sides of the bottle mouth mold; wherein the pair of bolt grooves are located on the side walls of the bottle mouth mold at both ends, and are formed by the first half mold and the second half mold.

[0014] In one embodiment, a through slot is transversely formed at a position of each fixing member for the locking bolt to pass through.

[0015] In one embodiment, the elastic displacement mechanism includes a stepped seat hole transversely opened on at least one side of the locking member adjacent to each of the fixing members; and a locking member sleeved with an elastic member in each of the seat holes and locked to the fixing members. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of a quick mold changing device provided by an embodiment of the present invention installed on a molding machine;

[0017] Figure 2 A three-dimensional exploded view of a quick mold changing device provided in an embodiment of the present invention;

[0018] Figure 3 A three-dimensional exploded view of the bottle mouth mold provided by an embodiment of the present invention after docking with the fixing part and the telescopic part;

[0019] Figure 4 for Figure 3 A three-dimensional view of the quick mold change device after being assembled and in a locked state;

[0020] Figure 5 for Figure 3 A cross-sectional view of the quick mold change device is shown to illustrate the locking configuration;

[0021] Figure 6 A partially enlarged cross-sectional view of a quick mold changing device provided by an embodiment of the present invention, showing that the bottle mouth mold is in a locked state; and

[0022] Figure 7 A partially enlarged cross-sectional view of the quick mold changing device provided in an embodiment of the present invention shows that the bottle mouth mold is in an unlocked state. DETAILED DESCRIPTION

[0023] See also Figure 1, which shows that the quick mold changing device 2 provided in the embodiment of the present invention is installed on a molding machine 1, such as a lifting seat 12 above a workbench 11 of a vertical injection blow molding machine, and the bottom of the lifting seat 12 has a turntable 13 that rises and falls synchronously with the lifting seat 12. Therefore, the workbench 11 and the lifting seat 12 are provided with at least three operating stations 14, and the operating stations 14 include an injection station 141 provided on the workbench 11 for installing an injection mold 15, a blowing station 142 for installing a blowing mold 16, and an ejection station 143 provided on the lifting seat 12 for installing an ejection mechanism 17.

[0024] If the molding machine 1 is a vertical injection molding machine, the workbench 11 and the lifting base 12 are provided with two operating stations 14 in total. The operating stations 14 include an injection station 141 provided on the workbench 11 for installing an injection mold 15, and an ejection station 143 provided on the lifting base 12 for installing an ejection mechanism 17.

[0025] like Figures 2 to 5 As shown, the quick mold changing device 2 includes a mold corresponding to each of the operating stations 14, such as a bottle mouth mold 21, a pair of fixing members 22 for the bottle mouth mold 21 to be straddled and fixed and installed on the bottom surface of the turntable 13, and an unlocking mechanism 23 corresponding to one of the operating stations 14, such as the ejection station 143 and installed on the top surface of the lifting seat 12.

[0026] The bottle mouth mold 21 comprises a first half mold 211 and a second half mold 212, at least one connecting rod 213 which is transversely arranged through the first half mold 211 and the second half mold 212 and has a stepped through hole 211a, 212a corresponding to each other, a telescopic spring 214 is further sleeved in each through hole 211a, 212a on both sides of the connecting rod 213, and an end seal 215, such as a nut, is provided at both ends, and a pair of top connecting grooves 216 which are formed by the first half mold 211 and the second half mold 212 butting against each other and are inwardly beveled are longitudinally arranged at intervals on both sides of the bottle mouth mold 21. The ejection mechanism 17 is provided with a second telescopic driving device 171, and the second telescopic driving device 171, such as a pneumatic cylinder, can synchronously drive two ejection blades 172 which pass through the lifting seat 12 and the rotating disk 13 and whose positions correspond to the pair of top connecting grooves 216 to perform lifting and lowering actions.

[0027] Therefore, when the pair of ejector blades 172 respectively penetrate into the corresponding top-connecting grooves 216, the first half mold 211 and the second half mold 212 can be respectively compressed into the corresponding telescopic springs 214 to form an expanded and outwardly stretched state, so as to drop the blown bottles at the ejection station 143. Then, the pair of ejector blades 511 retracts to the original position as the second telescopic driving device 171 is actuated again. The overall structure and the lateral opening and closing actions of the bottle mouth mold 21 are all prior art and will not be further described here.

[0028] The feature of the bottle mouth mold 21 that is different from the prior art is that a pair of bolt grooves 217 formed by connecting the first half mold 211 and the second half mold 212 are longitudinally arranged on the side walls at both ends of the bottle mouth mold 21.

[0029] The bottom of the pair of fixing members 22 locked to the bottom surface of the turntable 13 extends inwardly in opposite directions to a pair of supporting plates 221 for bridging and positioning the two sides of the bottle mouth mold 21, and each of the fixing members 22 is horizontally provided with a through groove 222 facing the corresponding bolt groove 217; a locking member 223 is connected to the outer side of each of the fixing members 22, and each of the locking members 223 extends toward the corresponding through groove 222 through the through groove 222 and is locked in the bolt groove 217. A locking bolt 224 is also provided on the top surface of each of the locking members 223, which is beveled inward.

[0030] Furthermore, each locking member 223 is provided with an elastic displacement mechanism 226 facing the corresponding fixing member 22, and the elastic displacement mechanism 226 includes a stepped seat hole 226a which is transversely opened on at least one side of the locking member 223 adjacent to each fixing member 22; and a locking accessory 226c, such as a bolt, which is sleeved with an elastic member 226b in each seat hole 226a and locked to the fixing member 22, so that each locking member 223 can form a transverse displacement on the outer side of the corresponding fixing member 22 under the elastic action of the elastic displacement mechanism 226, so that the locking bolt 224 can be inserted into or separated from the corresponding bolt groove 217 of the bottle mouth mold 21, thereby forming a locking and fixing or unlocking and separating effect on the bottle mouth mold 21.

[0031] The unlocking mechanism 23 is installed on the top surface of the lifting seat 12 and is preferably located at the ejection station 143. The unlocking mechanism 23 includes at least one first telescopic driving device 231, such as Figure 2 As shown, the first telescopic driving device 231, such as a pair of pneumatic cylinders, can synchronously drive a pair of unlocking blades 232 that pass through the lifting seat 12 and the turntable 13 and whose positions correspond to the pair of unlocking grooves 225, so that the pair of unlocking blades 232 have a lifting function.

[0032] In another embodiment, there is only one first telescopic driving device 231, and the first telescopic driving device 231 and the pair of unlocking blades 232 are connected by a known T-shaped connecting rod (not shown in the figure).

[0033] See also Figure 5 and Figure 6 , which shows a partial enlarged cross-sectional view of the quick mold changing device. It can be clearly observed from the figure that the pair of fixing members 22 locked to the turntable 13 are the pair of supporting plates 221 extending oppositely to each other for bridging and positioning the two sides of the bottle mouth mold 21, and the locking bolt 224 of the locking member 223 arranged on the outer side of each of the fixing members 22 passes through the through groove 222 and is respectively inserted into the corresponding bolt grooves 217 at both ends of the bottle mouth mold 21, so that the bottle mouth mold 21 is in a locked state.

[0034] See also Figure 7 If a bottle mouth mold with a different caliber is to be replaced, an operator only needs to activate the unlocking mechanism 23, so that the at least one first telescopic driving device 231 installed on the top surface of the lifting seat 12 drives the pair of unlocking blades 232 to move downward longitudinally synchronously, and pass through the lifting seat 12 and the turntable 13 to insert into the pair of unlocking grooves 225, so as to compress each of the elastic members 226b in the elastic displacement mechanism 226, and promote the pair of locking members 223 together with the corresponding locking bolts 224 to move outward to disengage from the pair of bolt grooves 217 at both ends of the bottle mouth mold 21, so that the bottle mouth mold 21 is in the unlocking mode.

[0035] At this time, the operator can remove the old bottle mouth mold 21 from the pair of fixing members 22, and then place a new bottle mouth mold 21 between the pair of supporting plates 221 and the rotating disk 13, and finally start the unlocking mechanism 23, so that the at least one first telescopic driving device 231 drives the pair of unlocking blades 232 to move upward longitudinally synchronously to disengage from the pair of unlocking grooves 225. At this time, each of the elastic members 226b in the elastic displacement mechanism 226 stretches, and pushes the locking member 223 and the locking bolt 224 to move inward, so that each of the locking bolts 224 is inserted into the corresponding bolt groove 217 of the bottle mouth mold 21, so as to form a Figure 5 and Figure 6 The bottle mouth mold 21 is shown in a locked state.

[0036] Therefore, the embodiment of the present invention achieves the following effect: by setting the quick mold change device at an operating station, such as an ejection station, the pair of fixing parts can elastically displace the pair of locking parts connected to the pair of fixing parts to form a locking or unlocking action on the mold, such as a bottle mouth mold, and there is no complicated disassembly and assembly process of removing or locking connecting parts, such as screws, so as to achieve the effect of quick mold change. Furthermore, the quick mold change device can be performed by a single person, which saves manpower and working hours, and can be regarded as a great and better structure unprecedented in similar products.

[0037] The embodiment provided by the present invention is one of the preferred embodiments. Any local improvements or modifications that are derived from the spirit and principle of the present invention and are easily conceived by those skilled in the art are within the protection scope of the present invention.

Claims

1. A rapid mold change device for a molding machine, which is installed in a molding machine, the molding machine comprises a workbench, a lifting seat, and a turntable arranged at the bottom of the lifting seat and rising and falling synchronously, the workbench and the lifting seat are provided with at least two operating stations; wherein the rapid mold change device comprises: A mold corresponding to each of the operating stations, with a pair of bolt grooves longitudinally provided on the side walls at both ends; A pair of fixing members, which are installed on the bottom surface of the turntable, and the pair of fixing members extend a pair of supporting plates for the mold to be straddled and positioned; a locking member is connected to the outer side of each fixing member, and each locking member extends a locking bolt passing through the adjacent fixing member toward the corresponding bolt groove, and an unlocking groove is further provided on the top surface of each locking member; and each locking member is provided with an elastic displacement mechanism toward the corresponding fixing member; and an unlocking mechanism, which is installed on the top surface of the lifting seat and corresponds to one of the operating stations, and the unlocking mechanism includes at least one first telescopic driving device, and a pair of unlocking blades which are synchronously driven by the first telescopic driving device and pass through the lifting seat and the turntable and whose positions correspond to the pair of unlocking grooves; When the pair of unlocking blades are inserted into the pair of unlocking grooves, the pair of locking members form a lateral displacement on the outer side of the pair of fixing members under the elastic action of the elastic displacement mechanism, so that each of the locking bolts is disengaged from the corresponding bolt groove to form the unlocking of the mold; in addition, when the pair of unlocking blades are disengaged from the pair of unlocking grooves, the pair of locking members form another lateral displacement on the outer side of the pair of fixing members under the elastic action of the elastic displacement mechanism, so that each of the locking bolts is inserted into the corresponding bolt groove to form the locking of the mold.

2. The rapid mold changing device for a molding machine according to claim 1, characterized in that: The molding machine is a vertical injection blow molding machine, and the operating stations include an injection station for installing an injection mold on the workbench, a blowing station for installing a blowing mold, and an ejection station for installing an ejection mechanism on the lifting seat.

3. The rapid mold changing device for a molding machine according to claim 1, characterized in that: The molding machine is a vertical injection molding machine. The operating stations include an injection station arranged on the workbench for installing an injection mold, and an ejection station arranged on the lifting seat for installing an ejection mechanism.

4. The rapid mold changing device for a molding machine according to claim 2 or 3, characterized in that: The unlocking mechanism is installed on the ejection station of the top surface of the lifting seat.

5. The rapid mold changing device for a molding machine according to claim 1, wherein the mold is a bottle mouth mold.

6. The rapid mold changing device for a molding machine according to claim 5, characterized in that: The bottle mouth mold comprises a first half mold and a second half mold; at least one connecting rod is transversely arranged through the first half mold and the second half mold, and has a stepped through hole corresponding to each other, and a telescopic spring is further sleeved in each through hole on both sides of the connecting rod, and an end seal is provided at each end; and a pair of top connecting grooves formed by the first half mold and the second half mold and inclined inwardly are longitudinally arranged at intervals on both sides of the bottle mouth mold; wherein the pair of bolt grooves are located at the side walls of the bottle mouth mold at both ends, and are formed by the first half mold and the second half mold being connected.

7. The rapid mold changing device for a molding machine according to claim 1, characterized in that: A through slot is transversely formed at a position of each fixing piece for the locking bolt to pass through.

8. The rapid mold changing device for a molding machine according to claim 1, characterized in that: The elastic displacement mechanism comprises a stepped seat hole which is transversely opened on at least one side of the locking member adjacent to each of the fixing members; and a locking member which sleeves an elastic member in each of the seat holes and is locked to the fixing member.

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