CN110014535B

CN110014535B - Quick die changing device for forming machine

Info

Publication number: CN110014535B
Application number: CN201710566053.3A
Authority: CN
Inventors: 张再顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-07-12
Filing date: 2017-07-12
Publication date: 2021-06-29
Anticipated expiration: 2037-07-12
Also published as: CN110014535A

Abstract

A quick die change device for a forming machine comprises the forming machine with a machine station, wherein the machine station is provided with an operation station, at least one pair of locking mechanisms are arranged on the operation station at intervals and oppositely, and a carrying platform is arranged on the machine station; each locking mechanism comprises a valve chamber which is arranged on the machine table and provided with a fixed cover at the top, a valve rod longitudinally passes through the fixed cover in the valve chamber and is tightly connected with the inner peripheral surface of the valve chamber through a rod seat of the valve rod, an elastic body is arranged at the bottom of the rod seat and the valve chamber, the valve rod is provided with a through hole communicated with the valve chamber between the rod seat and the fixed cover, and the through hole is connected with a locking fluid pressure cylinder for injecting or returning a fluid; and a pressing rod positioned above the die is transversely arranged at the top of the valve rod; the fluid is injected into the valve chamber or returns from the valve chamber to cause the valve rod and the pressing rod to move downwards or upwards together, so that a locking end of the pressing rod forms locking or unlocking action on a mold on the carrier.

Description

Quick die changing device for forming machine

Technical Field

The present invention relates to a mold changing device, and more particularly to a mold changing device for a molding machine, such as an injection molding machine or an injection blow molding machine.

Background

A molding machine, such as an injection molding machine or an injection bottle blowing machine, is an indispensable apparatus for manufacturing plastic products. The former produces plastic products through molds, so that different molds are replaced to produce different types of plastic products.

When the forming machine is used for replacing a mould, firstly, the mould is manually removed from a station on a machine table of the forming machine, and then the mould is pushed to an open space; then, hoisting the mould away from the machine table by using a crown block; then, hanging a new mould to the open space, and manually moving the new mould to the station and positioning; finally, the new mold is installed, for example, locked to the station of the machine.

The molds often have different weights depending on the size and production quantity of plastic products, and are light in tens of kilograms and heavy in hundreds of kilograms, which is not a load that can be applied by manpower. Furthermore, the space of the stations, such as the injection station, is limited, so that it is more difficult to carry the molds to the open space, which increases labor waste and time consumption, in addition to difficult mounting and dismounting.

Based on the defects of the molding machine during mold changing, related manufacturers have developed a mold changing assisting mechanism that can change the mold with less effort and easily control the moving distance of the mold, for example, taiwan patent publication No. TW 201404572 a, the mold changing assisting mechanism is mounted on a molding device, the molding device is disposed on a plane and includes a molding mold for forming a bottle blank into a hollow product, the mold changing assisting mechanism further includes a rail mounted on the plane and a base disposed on the molding device and moving on the rail, and the base can drive the molding mold to move relative to the plane. Therefore, the base can move the forming mold and an opening and closing driving device for controlling the opening and closing of the forming mold, such as a hydraulic cylinder, between the bottle blowing station and the open space, so as to perform mold changing operation in the open space and perform bottle blowing operation in the bottle blowing station.

Only the left half mold and the right half mold in the forming mold of the proposal are respectively locked on a left movable plate and a right movable plate of the opening and closing driving device, therefore, connecting pieces such as screws are still needed to be detached and locked during mold changing, which consumes labor and time and labor and is a defect of being insufficient in beauty.

Disclosure of Invention

The main purpose of the present disclosure is to provide a quick mold changing device for a molding machine, which has a carrier for positioning a mold, and at least a pair of locking mechanisms capable of locking the mold on the carrier, and through the operation of a transmission mechanism, the mold on the carrier can move between an operation station and an open space, so as to facilitate the replacement of the mold, thereby saving labor and time, and having no cumbersome process of detaching or locking a connecting member, thereby obtaining the effect of quick mold changing.

In order to achieve the above object, the technical means adopted in the present disclosure is to provide a rapid mold changing device for a molding machine, which includes a molding machine having a machine station, the machine station having an operation station and an open space adjacent to each other, the operation station having at least one pair of locking mechanisms disposed at an interval and opposite to each other, and the machine station further having a transmission mechanism; the carrying platform is arranged on the machine table, a positioning mechanism for positioning a mould is arranged on the top surface of the carrying platform, and the carrying platform is driven by the transmission mechanism to move and position the carrying platform between the operation station and the open space; wherein each locking mechanism comprises a valve chamber arranged on the machine platform and provided with a fixed cover at the top, a valve rod longitudinally passes through the fixed cover in the valve chamber and is tightly connected with the inner circumferential surface of the valve chamber by a rod seat of the valve rod, an elastic body is arranged at the bottom of the rod seat and the valve chamber, the valve rod is provided with a through hole communicated with the valve chamber between the rod seat and the fixed cover, and the through hole is connected with a locking fluid pressure cylinder for injecting or returning a fluid; and a pressing rod positioned above the die is transversely arranged at the top of the valve rod; by injecting the fluid into the valve chamber or returning from the valve chamber, the valve rod and the pressing rod move downwards or upwards together, so that a locking end of the pressing rod forms locking or unlocking action on the mold.

Drawings

To further disclose the detailed technical content of the present disclosure, please refer to the drawings, wherein:

FIG. 1 is a front view of the present invention showing a rapid mold changing device installed on a molding machine;

FIG. 2 is a partially enlarged schematic view of the rapid die change device of the present application at an operation station;

FIG. 3 is a top view of the present rapid tooling exchange device at an operating station and showing a first embodiment of a positioning mechanism;

FIG. 4 is a cross-sectional view of the positioning mechanism of FIG. 3 in a connected state;

FIG. 5 is a top view of the present rapid tooling exchange device at an operating station and showing a second embodiment of a positioning mechanism;

FIG. 6 is a cross-sectional view of the positioning mechanism of FIG. 5 in a connected state;

FIG. 7 is a side sectional view of the rapid mold changing device of the present disclosure positioned at an operation station, and showing a transmission relationship between a driving mechanism and a carrier;

FIG. 8 is an enlarged partial cross-sectional view of the quick-change mold device shown in FIG. 7, showing the mold in a locked condition;

FIG. 9 is another enlarged partial cross-sectional view of the quick change mold device shown in FIG. 7, showing the mold in an unlocked position;

fig. 10 is a partially enlarged schematic view of the rapid mold changing device of the present disclosure moving to an open space; and

fig. 11 is a top view of the rapid tooling change device of fig. 10 moved to an open space.

Detailed Description

Please refer to fig. 1, which shows that the present fast mold changing apparatus includes a carrier 2 installed on a machine table 11 of a molding machine 1, such as a vertical injection molding machine or a vertical injection bottle blowing machine, the carrier 2 is disposed in a rail groove 111 formed on the machine table 11, and the top surface of the machine table 11 is disposed at an operation station 12, such as an injection station, at least a pair of locking mechanisms 13 is disposed at intervals and oppositely, so that the carrier 2 is locked or unlocked by the at least a pair of locking mechanisms 13, thereby avoiding the inconvenience of disassembling and assembling a connecting member, such as a screw.

As shown in fig. 2 to 4, the carrier 2 can move linearly between the operating station 12 and an open space 14 adjacent to the operating station 12, the top surface of the carrier 2 is provided with a positioning mechanism 21, the positioning mechanism 21 of the first embodiment includes a positioning frame 211, the positioning frame 211 is shaped like a U so as to accommodate one end of a bottom plate 311 at the bottom of a lower mold 31 in a mold 3, and the other end of the bottom plate 311 penetrates through the bottom plate 311 and the carrier 2 by at least one positioning pin 212, so that the lower mold 31 can be positioned on the top surface of the carrier 2 without being deviated due to the movement of the carrier 2.

As shown in fig. 5 and fig. 6, the second embodiment of the positioning mechanism 21 includes at least a pair of guiding posts 213 disposed diagonally on the top surface of the carrier 2, and the bottom surface of the mold base 311 is provided with a guiding hole 312 at a position corresponding to the pair of guiding posts 213, respectively, and the guiding holes 312 are moved down along the guiding posts 213 to form a plugging pattern, so as to position the lower mold 31 on the top surface of the carrier 2 without being shifted by the movement of the carrier 2. Preferably, each of the guiding posts 213 and each of the guiding holes 312 are formed with a complementary tapered shape to facilitate alignment and insertion of the two.

Referring to fig. 2 to 4, a transmission mechanism 15 is disposed at the bottom of the rail groove 111 of the machine 11, and the transmission mechanism includes a power source 151, such as a hydraulic motor capable of rotating in forward and reverse directions, and a transmission member 152, such as a transmission gear, connected to the power source 151 and outputting power; the bottom of the carrier 2 is further provided with a driven member 22, such as a rack, driven by the transmission member 152. Therefore, when the hydraulic motor is started, it drives the transmission gear to rotate and drives the carrier 2 with the rack to generate linear movement, so that the carrier 2 can move and be positioned between the operation station 12 and the open space 14, thereby facilitating the injection operation at the operation station 12 or the mold changing operation at the open space 14.

The implementation of the transmission mechanism 15 is not limited to the above-mentioned embodiment, but in an implementation, the transmission member 152 can be a screw, and the driven member 22 can be a screw sleeve for screwing the screw, so that the same linear movement effect can be obtained. Alternatively, in another practical embodiment, the power source 151 is a driving fluid cylinder, such as a hydraulic cylinder or a pneumatic cylinder, the driving member 152 is a telescopic rod, and the driven member 22 is a connecting sleeve pivotally connected to the free end of the telescopic rod, so as to achieve the same linear movement effect.

Referring to fig. 1, a lifting seat 16 for installing an upper mold 32 in the mold 3 is provided above the operating station 12, a rotating disc 17 is pivoted in the lifting seat 16, and the rotating disc 17 is provided with a first bottle neck mold 33 and a second bottle neck mold 33' which are arranged in 180 degrees opposite directions in the mold 3. The lifting base 16 is driven by a lifting driving device, such as a hydraulic cylinder or a pneumatic cylinder (not shown), so that the lifting base 16 can be lifted vertically on a plurality of supports 161 fixed on the machine 11, and the turntable 17 is driven to move vertically. Therefore, the rapid mold changing device is suitable for a vertical molding machine, when the molding operation is performed, the upper mold 32 passes through the turntable 17 and the bottle neck molds 33 and 33' below the turntable 17, which are driven to descend by the lifting seat 16, and then the upper mold 32 and the lower mold 31 are in a mold clamping state. At this time, an injection pipe 4 (shown in fig. 4) of an injection machine injects molten plastic into a mold 3, such as a bottle blank mold, to inject at least one bottle blank 34, and after the mold is opened, the upper mold 32 and the turntable 17 of the lifting seat 16 are lifted to make the at least one bottle blank 34 leave the lower mold 31 and be clamped by the first bottle neck mold 33, so that the at least one bottle blank 34 is located at the operation station 12. Then, the turntable 12 is rotated 180 degrees to exchange the positions of the first bottle neck mold 33 and the second bottle neck mold 33' (shown in fig. 1), which are the prior art, for example, taiwan patent publication No. M344969 (corresponding to chinese patent No. 200820115856.3 and U.S. patent No. 8,002,539) owned by the applicant, and no further description is provided herein.

Referring to fig. 7 and 8, each locking mechanism 13 includes a valve chamber 131 disposed on the machine 11, the valve chamber 131 is of a multi-step type, a fixing cap 132 is disposed on the top of the valve chamber 131, a valve rod 133 longitudinally passes through the fixing cap 132 in the valve chamber 131, the bottom of the valve rod 133 is tightly connected to the inner peripheral surface of the valve chamber 131 by a rod seat 133a, and an elastic body 134, such as an extension spring, is disposed between the rod seat 133a and the bottom of the valve chamber 133. To facilitate the elevation of the valve stem 133 in the valve chamber 131, the valve stem 133 is opened with a through hole 133b communicating with the valve chamber 131 between the stem seat 133a and the fixed cap 132, and the through hole 133b may be further connected with a connection pipe 135 for connecting to a delivery pipe (not shown) of a locking fluid cylinder, such as a hydraulic cylinder or a pneumatic cylinder, into or from which a fluid F is injected or returned.

And a pressing rod 136 is transversely arranged on the top of the valve rod 133 and positioned above the die base plate 311. When the locking fluid cylinder is actuated, the fluid F, such as liquid, is injected into the valve chamber 131 between the stem seat 133a and the fixed cover 132 through the delivery pipe, the connecting pipe 135, and the through hole 133b, and the fluid pressure generated by the fluid F is utilized to make the stem 133 and the pressing rod 136 move downward together, and at the same time, the elastic body 134 is compressed (energy is stored), so that the locking end 136a of the pressing rod 136 presses the die base plate 311 with a pressing force to form a locking pattern. The lower mold 31 can thus be positioned firmly on the operating station 12 without the use of a detachable connection, for example a screw, by means of the implementation of the locking mechanism 13.

In addition, the locking mechanism 13 further includes a rotation-preventing mechanism 137, which includes a fixing sleeve 137a longitudinally fixed on the fixing cover 132, and the pressing rod 136 is longitudinally provided with a fixing bolt 137b inserted into the fixing sleeve 137a, so that the fixing bolt 137b is restrained by the fixing sleeve 137a, thereby preventing the pressing rod 136 from rotating and deviating. As shown in fig. 8, the fixing sleeve 137a is screwed to a stud 137c of the fixing cover 132 to form a fixed relationship therebetween.

Furthermore, the locking mechanism 13 further includes a height adjusting mechanism 138, which includes a fixing member 138a, such as a screw, disposed opposite to the locking end 136a of the pressing rod 136, and an adjusting member 138b, such as a nut, attached to the fixing member 138a, such as a screw; the height of the fixing member 138a is equal to or less than the height from the locking end 136a to the carrier 2, so that the height from the adjusting member 138b to the pressing rod 136 is slightly greater than the height from the locking end 136a to the carrier 2 by the longitudinal displacement of the adjusting member 138b in the fixing member 138a, and the locking end 136a can increase the pressing force on the die base plate 311 by the moment effect of the lever.

Referring to fig. 9, when the mold is to be replaced, the operator closes the locking fluid cylinder to make the fluid F flow back into the locking fluid cylinder from the valve chamber 131 between the rod seat 133a and the fixing cover 132, the through hole 133b, the connecting pipe 135 and the conveying pipe, so that the fluid pressure is lost to the valve rod 133, the elastic body 134 is released, the valve rod 133 and the pressing rod 136 are moved upward together, and the locking end 136a releases the pressing force on the mold base plate 311 to form an unlocking pattern.

Referring to fig. 10 and 11, after the locking mechanisms 13 unlock the mold base 311, the power source 151 of the transmission mechanism 15 is activated, so that the transmission member 152 drives the driven member 22 of the carrier 2 to move outward to the open space 14 at the operation station 12, thereby facilitating the replacement of the mold 3, such as the lower mold 31. Wherein the machine 11 is further provided with a support 18 at a side of the open space 14 for supporting the carrier 2 and the mold 3. After the mold 3 is replaced, the transmission mechanism 15 returns the carrier 2 and the mold 3 to the operation station 12, and the mold 3 after replacement is locked by the locking mechanisms, so that the molding operation can be performed.

Therefore, the present invention has the added beneficial effect that at least one pair of locking mechanisms is arranged at the operating station at intervals and oppositely, so that the at least one pair of locking mechanisms can lock or unlock the die carried by the carrier, thereby avoiding the inconvenience of disassembling and assembling connecting pieces, such as screws. Moreover, the carrying platform can move between the operation station and the open space through the operation of the transmission mechanism, so that the replacement of the mold is convenient, and the effects of saving labor and working hours are achieved. In addition, the locking mechanism is additionally provided with a rotation prevention mechanism, so that the pressing rod can be prevented from rotating and deviating. Furthermore, the height adjusting mechanism additionally arranged on the locking mechanism can increase the pressing force of the locking end of the pressing rod on the mold through the moment of the lever, which is similar to an unprecedented good structure of the same kind of articles.

The disclosure is one of the preferred embodiments, and any local modification or modification derived from the technical idea of the present disclosure can be easily deduced by those skilled in the art without departing from the scope of the patent right of the present disclosure.

Claims

1. A quick-change mold apparatus for a molding machine, comprising:

a forming machine, which has a machine station, the machine station is provided with an operation station and an open space which are adjacent, the operation station is provided with at least a pair of locking mechanisms at intervals and oppositely, and the machine station is further provided with a transmission mechanism; and

a carrying platform, which is arranged on the machine platform, and the top surface of the carrying platform is provided with a positioning mechanism for positioning a mould, and the carrying platform is driven by the transmission mechanism to move and position the carrying platform between the operation station and the open space;

wherein each locking mechanism comprises a valve chamber arranged on the machine platform and provided with a fixed cover at the top, a valve rod longitudinally passes through the fixed cover in the valve chamber and is tightly connected with the inner circumferential surface of the valve chamber by a rod seat of the valve rod, an elastic body is arranged at the bottom of the rod seat and the valve chamber, the valve rod is provided with a through hole communicated with the valve chamber between the rod seat and the fixed cover, and the through hole is connected with a locking fluid pressure cylinder for injecting or returning a fluid; and a pressing rod positioned above the die is transversely arranged at the top of the valve rod; by injecting the fluid into the valve chamber or returning from the valve chamber, the valve rod and the pressing rod move downwards or upwards together, so that a locking end of the pressing rod forms locking or unlocking action on the mold.

2. The apparatus of claim 1, wherein the positioning mechanism comprises a positioning frame for engaging with an end of a bottom plate of the mold bottom, and the other end of the bottom plate is inserted through the bottom plate and the carrier by at least one positioning pin, so as to position the mold on the top surface of the carrier.

3. The mold quick-change apparatus according to claim 1, wherein the positioning mechanism comprises at least one pair of guide posts diagonally disposed on the top surface of the carrier, and a bottom surface of a mold bottom plate of the mold bottom is provided with a guide hole at a position corresponding to the at least one pair of guide posts, respectively, and the guide holes are moved down along the guide posts to form a plug-in configuration so as to position the mold on the top surface of the carrier.

4. The quick die change apparatus for a molding machine as claimed in claim 3, wherein each of the guide posts and each of the guide holes are of complementary tapered configuration.

5. The quick die change apparatus for a molding machine as claimed in claim 1, wherein the transmission mechanism includes a power source, and a transmission member connected to the power source and serving as a power output; the carrying platform is provided with a driven part driven by the transmission part.

6. The quick die change apparatus for a molding machine as claimed in claim 5, wherein the power source is a reversible hydraulic motor, the transmission member is a transmission gear, and the driven member is a rack.

7. The quick die change apparatus for a molding machine as claimed in claim 5, wherein the power source is a reversible hydraulic motor, the driving member is a screw, and the driven member is a screw housing.

8. The rapid tooling exchange apparatus for a molding machine as claimed in claim 5, wherein the power source is a driving fluid cylinder, the driving member is a telescopic rod, and the driven member is a connecting sleeve.

9. The quick die change apparatus for a molding machine as claimed in claim 1, wherein the through hole is further connected with a connection pipe connected to the locking fluid cylinder.

10. The apparatus of claim 1, wherein each locking mechanism further comprises a rotation preventing mechanism, the rotation preventing mechanism comprises a fixing sleeve longitudinally fixed on the fixing cover, and the pressing rod is longitudinally provided with a fixing bolt inserted into the fixing sleeve.

11. The quick die change apparatus for a molding machine as claimed in claim 10, wherein the retaining sleeve is threaded to a stud of the retaining cap to form a fixed relationship therebetween.

12. The quick die change apparatus for a molding machine as claimed in claim 1, wherein each locking mechanism further comprises a height adjustment mechanism including a fixing member disposed opposite to the locking end of the pressing rod, and an adjustment member cap attached to a bottom of the fixing member; the height of the fixing piece is equal to or less than the height from the locking end to the carrier, the height from the adjusting piece to the pressing rod is larger than the height from the locking end to the carrier through the longitudinal displacement adjustment of the adjusting piece on the fixing piece, and the pressing force of the die can be increased by the locking end through the moment action of the lever.

13. The quick die change apparatus for a molding machine as claimed in claim 12, wherein the fixing member is a screw and the adjusting member is a nut.

14. The apparatus of claim 1, wherein the machine platform further comprises a support frame for supporting the carrier and the mold in a lateral direction of the open space.

15. The apparatus of claim 1, wherein the molding machine is a vertical injection molding machine or a vertical injection blow molding machine.