CN212653755U

CN212653755U - Double-station plastic injection molding machine

Info

Publication number: CN212653755U
Application number: CN202020530521.9U
Authority: CN
Inventors: 陈勇成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-12
Filing date: 2020-04-12
Publication date: 2021-03-05
Anticipated expiration: 2030-04-12

Abstract

The invention discloses a plastic double-station injection molding machine, which comprises an injection molding device and a forming device, wherein the injection molding device comprises a plastic injection molding machine body and a plastic injection molding machine body; the forming device comprises a rack, two sliding rails are arranged on the rack, a sliding plate is arranged on the sliding rails, and the sliding plate can intermittently reciprocate left and right relative to the sliding rails; the sliding plate is provided with two through holes, and a forming die is arranged on each through hole; a cross beam is arranged on the front side of the injection molding device and extends to the upper part of the middle part of the rack, and an injection molding sprue is arranged below the middle part of the cross beam; after the sliding plate slides each time, one set of forming mold is positioned under the injection molding sprue to perform injection molding operation, and the other set of blowing mold deviating from the injection molding sprue performs mold opening and blanking operation simultaneously. The whole equipment designed by the invention comprises two sets of forming dies, and the two forming dies respectively correspond to injection molding and die sinking blanking at the same time point, so that the continuous processing of plastic products can be realized, the utilization rate of the equipment can be effectively improved, the processing efficiency of the products is improved, and the equipment has good economic benefit.

Description

Double-station plastic injection molding machine

Technical Field

The invention relates to a plastic injection molding machine, in particular to a double-station plastic injection molding machine.

Background

Plastics (including TPR, TPE, PVC, etc.) are widely used for producing various articles of daily use due to their material characteristics of light weight, chemical stability, no corrosion, etc.

Here, the plastic products are all formed by molding with an injection molding machine. The existing injection molding machine is generally of a single-station processing structure, and the processing mode and the structure setting have certain defects, namely a certain empty process can be formed in the blanking process, so that equipment cannot be effectively utilized, the processing efficiency of a product is seriously influenced, and the requirement of mass production of plastic products is difficult to meet.

Disclosure of Invention

Aiming at the problems, the invention designs the plastic double-station injection molding machine, the whole equipment comprises two sets of forming dies capable of reciprocating left and right, the two forming dies respectively correspond to injection molding and die sinking blanking at the same time point, the continuous processing of plastic products can be realized, the utilization rate of the equipment can be effectively improved, the processing efficiency of the products is improved, and the plastic double-station injection molding machine has good economic benefit.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a duplex position injection molding machine of plastics, includes injection molding device and forming device, its characterized in that: the molding device comprises a frame, two slide rails which are arranged on the front side of the injection molding device are arranged on the frame, a slide plate is arranged on the slide rails, and the slide plate can intermittently reciprocate left and right relative to the slide rails under the drive of a driving device; two through holes are distributed on the sliding plate at intervals, and a forming die which can be separated up and down relative to the sliding plate is arranged on each through hole; a cross beam is arranged on the front side of the injection molding device and extends to the upper part of the middle part of the rack, and an injection molding sprue is arranged below the middle part of the cross beam; the left sliding or right sliding movement of the sliding plate enables one set of forming mold to be positioned under the injection gate for injection molding operation, and the other set of blowing mold deviating from the injection gate simultaneously performs mold opening and blanking operation; the machine frame is provided with a lifting platform under the injection molding sprue, and the lifting platform rises to penetrate through a through hole in the sliding plate and drive a forming mold on the sliding plate to rise and be combined with the injection molding sprue to perform injection molding operation.

More specifically, the sliding plate sliding driving device comprises a gear and a rack, wherein the rack is arranged at the bottom of the sliding plate and is meshed with the gear positioned on the rack, and the gear is connected with the driving motor through a transmission.

More specifically, the sliding plate sliding driving device comprises a screw rod and a servo motor, the screw rod is in threaded connection with the bottom of the sliding plate, and the other end of the screw rod is connected with the servo motor.

More specifically, the slide plate is provided with a proximity control switch on a rear side corresponding to each molding die, and the proximity control switch triggers a signal to stop the movement of the slide plate when the proximity control switch is close to a trigger switch on the injection molding device.

More specifically, a guide mechanism is arranged between the forming die and the sliding plate, the guide mechanism comprises a plurality of groups of guide rods and guide holes, the guide rods and the guide holes of each group are respectively and correspondingly arranged on the surface of the sliding plate and the bottom surface of the forming die, and the top ends of the guide rods are arranged to be conical.

More specifically, the forming die comprises a bottom die plate, a forming lower die plate and a forming upper die plate, wherein the three die plates are sequentially overlapped from bottom to top; a sprue is arranged on the upper molding plate, and a product cavity is arranged between the upper molding plate and the lower molding plate; and water cooling pipelines are arranged in the upper molding plate and the lower molding plate and are communicated with an external cooling water source in a closed loop mode.

More specifically, two support rods are respectively arranged on two sides of the forming upper template, and a strip hole is respectively arranged on two sides of each forming die by the sliding plate; the machine frame is provided with a die opening mechanism on each of two sides of the machine frame, the die opening mechanism comprises a bottom lifting mechanism positioned below the sliding plate, and the bottom lifting mechanism mainly comprises a lifting oil cylinder, a lifting plate, a plurality of connecting rods and two lifting strips; a piston rod of the lifting oil cylinder is connected with the lifting plate, and two sides of the lifting plate are connected with two lifting strips through the connecting rod; the top of the lifting bar is provided with a matching groove corresponding to the position of the supporting rod; after the blowing mold moves in place, the lifting bar is lifted up through the long hole on the corresponding side under the action of the lifting oil cylinder to synchronously jack up the support bar on the corresponding side and the upper molding template.

More specifically, the two lifting oil cylinders of the bottom lifting mechanism are symmetrically distributed on two sides of the lifting plate; meanwhile, an upper guide plate fixedly connected with the rack is arranged above the lifting plate, a lower fixed plate fixedly connected with the rack is arranged below the lifting plate, a guide pillar movably sleeved with the lifting plate is arranged between the upper guide plate and the lower fixed plate, and a connecting rod on the lifting plate penetrates through a guide hole in the guide plate and then is connected with the lifting strip.

More specifically, the mold opening mechanism further comprises a stop mechanism positioned above the sliding plate; the stop mechanism comprises a positioning frame, the rear end of the positioning frame is fixed on the rack, the front end of the positioning frame is a free end, two sides of the top end of the free end are respectively provided with a roller, and the axes corresponding to the two rollers are deviated from the inner supporting rod on the upper forming template by a certain distance towards the back.

More specifically, the gate is formed in a shape of a Chinese character mi, an I, or a cross.

According to the plastic double-station injection molding machine, the sliding plate is provided with the two sets of forming dies which are distributed at intervals, the two forming dies respectively correspond to two stations of injection molding and mold opening and blanking at each processing time point, and the two sets of forming dies sequentially alternate the corresponding stations after the sliding plate moves leftwards or rightwards each time, so that synchronous operation of injection molding and mold opening and blanking is realized, invalid idle stroke time in the processing process is avoided, the utilization rate of equipment can be effectively improved, and the processing efficiency of products is improved.

Drawings

FIG. 1 is a top plan view of a planar structure of the present invention;

FIG. 2 is a plan view of a planar structure of two sets of forming molds of the present invention after displacement along with a slide plate;

FIG. 3, a front view of the present invention;

FIG. 4 is a schematic view of the structure of the open die blanking of the present invention;

FIG. 5 is a schematic view of a bottom lifting mechanism of the dual cylinder structure of the present invention.

Detailed Description

As shown in fig. 1-4, a plastic double-station injection molding machine comprises an injection molding device 1 and a molding device.

The molding device is a double-station processing mechanism and comprises a frame 2, two slide rails 21 which are arranged on the front side of the injection molding device 1 are arranged on the frame 2, a slide plate 3 is arranged on the slide rails 21, and the slide plate 3 can move left and right in a reciprocating manner at intervals relative to the slide rails 21 under the driving of a driving device.

The driving device is a gear-rack transmission mechanism which comprises a gear and a rack, wherein the rack is arranged at the bottom of the sliding plate 3 and is meshed with the gear positioned on the rack 2, and the gear is connected with the driving motor 4 through a transmission. In operation, the driving motor 4 drives the gear to rotate forward and backward through the transmission, and further drives the sliding plate 3 to reciprocate left and right on the sliding rail 21.

Or the driving device is a screw rod mechanism and comprises a screw rod and a driving motor, the screw rod is in threaded connection with the bottom of the sliding plate 3, and the other end of the screw rod is connected with a servo motor. In operation, the positive and negative rotation of the servo motor drives the screw rod to synchronously rotate positively and negatively, so as to drive the sliding plate 3 to reciprocate leftwards and rightwards on the sliding rail 21.

The two driving structures can be selected according to actual conditions.

Two through holes 31 are arranged on the sliding plate 3 at intervals, and a forming die which can be vertically separated relative to the sliding plate is arranged on the position of each through hole 31, in the figure, the forming die positioned on the left side is 5a, and the forming die positioned on the right side is 5 b.

The injection molding device 1 adopts general equipment on the market, a cross beam 11 is arranged on the front side of the injection molding device 1 and extends to the upper part of the middle part of the rack 2, and an injection molding sprue 111 is arranged below the middle part of the cross beam 11.

The slide plate 3 slides left or right to enable one set of forming

mold

5a or 5b to be positioned right below the injection gate 111 for injection molding operation, and the other set of blowing mold deviating from the injection gate 111 performs mold opening and blanking operation simultaneously.

Here, in order to ensure the accuracy of the slide 3 in place, the slide 3 is provided with a proximity control switch 32 on the rear side corresponding to each of the molding dies 5a and 5b, and when the slide is in operation, the proximity control switch 32 is triggered when approaching a trigger switch on the injection molding device 1, and sends a signal to start a brake device below the slide, and a brake pad of the brake device pushes up to stop the slide 3 to prepare for the next injection molding operation.

The frame 2 is provided with a lifting platform 6 at a position right below the injection gate 111, and the lifting platform 6 is lifted to pass through the through hole 31 on the sliding plate 3 and drive the forming

mold

5a or 5b thereon to lift to be combined with the injection gate 111 for injection molding operation.

In operation, when the slide plate 3 stops moving, the lifting platform 6 is driven by the working cylinder 61 to vertically lift up through the through hole 31 of the slide plate 3 and drive the forming

mold

5a or 5b thereon to lift up to be combined with the injection gate 111 for injection molding operation. After the injection molding is completed, the lift table 6 is lowered and returned to place the

mold

5a or 5b in the slide plate 3 again. Then, the slide plate 3 moves again to send the forming mold after the blanking for the injection molding operation, and move the forming mold after the injection molding out for the operations of mold opening and blanking.

In order to ensure the effective positioning of the forming

mold

5a or 5b during the up-and-down movement, a guide mechanism 7 is arranged between the forming

mold

5a or 5b and the sliding plate 3, the guide mechanism 7 comprises a plurality of groups of guide rods 71 and guide holes 72 arranged around the through hole 31, and the guide rods 71 and the guide holes 72 of each group are correspondingly arranged on the surface of the sliding plate 3 and the bottom surface of the forming

mold

5a or 5b, respectively. In the present illustration, the guide rod 71 is provided on the slide plate 3 and the guide hole 72 is provided on the bottom surface of the

molding die

5a or 5b, and the positions of the guide rod 71 and the guide hole 72 may be interchanged in practice. The top end of the guide rod 71 is tapered to realize automatic correction and guidance within a certain error range when the guide rod is inserted into the guide hole 72.

The forming

mold

5a or 5b has the same structure and comprises a bottom mold plate 51, a forming lower mold plate 52 and a forming upper mold plate 53, and the three mold plates are sequentially stacked from bottom to top. The upper molding plate 53 is provided with a gate 531, and a product cavity is arranged between the upper molding plate 53 and the lower molding plate 52. Meanwhile, in consideration of the heat dissipation and cooling requirements of the molded product, the molding upper template 53 and the molding lower template 52 are both provided with water cooling pipelines 54, and the water cooling pipelines 54 are communicated with an external cooling water source in a closed loop manner.

In order to meet the requirement of injection molding of a large-area product, effectively increase the injection molding speed and ensure the uniformity of materials of each part of the product, the shape of the gate 531 can be designed to be in a shape like a Chinese character ' mi ', an I ' shape, a cross shape and the like, only the gate 531 in the shape like the Chinese character ' mi ' is illustrated in the figure, and other gate shapes with equivalent effects can be adopted in practice.

In order to realize the fast die sinking and blanking of the forming dies 5, two support rods 532 are respectively arranged on two sides of the forming upper die plate 53 of each forming die 5, and the sliding plate 3 is provided with a strip hole 33 on two sides of each forming die 5.

The frame 1 is provided with a die sinking mechanism on each of two sides thereof, and the die sinking mechanism comprises a bottom lifting mechanism 81 located below the sliding plate 3.

The bottom lifting mechanism 81 mainly includes a lifting cylinder 811, a lifting plate 812, a plurality of connecting rods 813 and two lifting bars 814. The lift cylinder 811 may be configured to have a single cylinder structure or a double cylinder structure as needed, and only the single cylinder structure is illustrated in the drawings. A piston rod of the lifting cylinder 811 is connected with the lifting plate 812, and two sides of the lifting plate 812 are connected with two lifting bars 814 through the connecting rod 813; the top of the lifting bar 814 is provided with a matching groove 8141 corresponding to the support bar 532.

In practice, in order to obtain better synchronous lifting precision of the lifting strips 814 at two sides, as shown in fig. 5, the bottom lifting mechanism adopts a double-cylinder arrangement, which mainly comprises two lifting cylinders 811, a lifting plate 812, a plurality of connecting rods 813, two lifting strips 814, an upper guide plate 815, a lower fixing plate 816 and a plurality of guide posts 817. The two lifting cylinders 811 are symmetrically arranged on two sides of the lifting plate 812, and the upper parts of two sides of the lifting plate 812 are connected with two lifting bars 814 through the connecting rods 813. Meanwhile, an upper guide plate 815 fixed with the frame 2 is arranged above the lifting plate 812, a lower fixed plate 816 fixed with the frame 2 is arranged below the lifting plate 821, a guide post 817 movably sleeved with the lifting plate 812 is arranged between the upper guide plate 815 and the lower fixed plate 816, and the connecting rod 813 passes through a guide hole 8151 on the guide plate 815 and then is connected with the lifting bar 814. When the lifting device is in use, the lifting plate 812 is driven by the piston rods of the two lifting cylinders 811 to slide up and down along the guide posts 817, meanwhile, the guide rods slide up and down along the guide holes 8151 on the upper guide plate 815, and the guide posts 817 are combined with the limiting effect of the guide holes 8151, so that the synchronous lifting precision of the lifting strips 815 on two sides can be effectively improved, and the die opening stability and accuracy of the upper forming die 53 are improved.

In the mold opening operation, after the blowing mold 5 moves to the right position, the lifting bar 814 is lifted up through the elongated hole 33 on the corresponding side under the action of the lifting cylinder 811 so that the support bar 532 on the corresponding side enters the corresponding fitting groove 8141, and then the lifting bar 814 drives the support bar 532 and the upper molding plate 53 to be synchronously jacked up along with the continuous rising of the lifting bar 814, so that the upper molding plate 53 is separated from the lower molding plate 52.

Here, in order to facilitate manual blanking, the mold opening mechanism further includes a stop mechanism 82 located above the sliding plate 3. The stopping mechanism 82 includes a positioning frame 821, the rear end of the positioning frame 821 is fixed on the frame 2, the front end of the positioning frame 821 is a free end, two sides of the top end of the free end are respectively provided with a roller 8211, and the corresponding axes of the two rollers 8211 deviate from the inner side support bar 532 on the upper molding plate 53 by a certain distance towards the back.

In use, once the upper molding plate 53 is lifted to a certain distance, the inner side of the top surface of the upper molding plate 53 is abutted against the roller 8211, and due to the offset arrangement of the roller 8211 and the inner supporting rod 532, along with the continuous lifting of the upper molding plate 53, the whole upper molding plate 53 rotates and inclines for a certain angle relative to the inner supporting rod 532, so as to provide a larger operation space for manual blanking. After the feeding is completed, the lift cylinder 811 is reset to realize the reverse rotation and descending reset of the upper molding plate 53, and the process is continued until the upper molding plate 53 is superposed on the lower molding plate 52.

In summary, the double-station plastic injection molding machine provided by the invention is characterized in that the slide plate 3 is provided with two sets of forming

molds

5a and 5b which are distributed at intervals, the two forming

molds

5a and 5b respectively correspond to two stations of injection molding and mold opening and blanking at each processing time point, and the two sets of forming

molds

5a and 5b sequentially alternate the corresponding stations after the slide plate 3 moves left or right each time, so that synchronous operation of injection molding and mold opening and blanking is realized, invalid idle stroke time generated in the processing process is avoided, the utilization rate of equipment can be effectively improved, and the processing efficiency of products is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change or modification made to the above embodiments according to the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a duplex position injection molding machine of plastics, includes injection molding device and forming device, its characterized in that: the molding device comprises a frame, two slide rails which are arranged on the front side of the injection molding device are arranged on the frame, a slide plate is arranged on the slide rails, and the slide plate can intermittently reciprocate left and right relative to the slide rails under the drive of a driving device; two through holes are distributed on the sliding plate at intervals, and a forming die which can be separated up and down relative to the sliding plate is arranged on each through hole; a cross beam is arranged on the front side of the injection molding device and extends to the upper part of the middle part of the rack, and an injection molding sprue is arranged below the middle part of the cross beam; the left sliding or right sliding movement of the sliding plate enables one set of forming mold to be positioned under the injection gate for injection molding operation, and the other set of blowing mold deviating from the injection gate simultaneously performs mold opening and blanking operation; the machine frame is provided with a lifting platform under the injection molding sprue, and the lifting platform rises to penetrate through a through hole in the sliding plate and drive a forming mold on the sliding plate to rise and be combined with the injection molding sprue to perform injection molding operation.

2. The plastic double-station injection molding machine of claim 1, wherein: the sliding driving device of the sliding plate comprises a gear and a rack, wherein the rack is arranged at the bottom of the sliding plate and is meshed with the gear positioned on the rack, and the gear is connected with the driving motor through a speed changer.

3. The plastic double-station injection molding machine of claim 1, wherein: the sliding driving device of the sliding plate is a screw rod and a servo motor, the screw rod is in threaded connection with the bottom of the sliding plate, and the other end of the screw rod is connected with the servo motor.

4. A plastic double station injection molding machine as claimed in any one of claims 1 to 3, wherein: and the sliding plate is provided with an approach control switch on the rear side surface corresponding to each forming die, and the approach control switch triggers a signal to stop the movement of the sliding plate when approaching a trigger switch on the injection molding device.

5. A plastic double station injection molding machine as claimed in any one of claims 1 to 3, wherein: a guide mechanism is arranged between the forming die and the sliding plate, the guide mechanism comprises a plurality of groups of guide rods and guide holes, the guide rods and the guide holes of each group are correspondingly arranged on the surface of the sliding plate and the bottom surface of the forming die respectively, and the top ends of the guide rods are arranged to be conical.

6. A plastic double station injection molding machine as claimed in any one of claims 1 to 3, wherein: the forming die comprises a bottom die plate, a forming lower die plate and a forming upper die plate, and the three die plates are sequentially overlapped from bottom to top; a sprue is arranged on the upper molding plate, and a product cavity is arranged between the upper molding plate and the lower molding plate; and water cooling pipelines are arranged in the upper molding plate and the lower molding plate and are communicated with an external cooling water source in a closed loop mode.

7. The plastic double-station injection molding machine of claim 6, wherein: two sides of the forming upper template are respectively provided with two supporting rods, and the two sides of each forming die of the sliding plate are respectively provided with a strip hole; the machine frame is provided with a die opening mechanism on each of two sides of the machine frame, the die opening mechanism comprises a bottom lifting mechanism positioned below the sliding plate, and the bottom lifting mechanism mainly comprises a lifting oil cylinder, a lifting plate, a plurality of connecting rods and two lifting strips; a piston rod of the lifting oil cylinder is connected with the lifting plate, and two sides of the lifting plate are connected with two lifting strips through the connecting rod; the top of the lifting bar is provided with a matching groove corresponding to the position of the supporting rod; after the blowing mold moves in place, the lifting bar is lifted up through the long hole on the corresponding side under the action of the lifting oil cylinder to synchronously jack up the support bar on the corresponding side and the upper molding template.

8. The plastic double-station injection molding machine of claim 7, wherein: the two lifting oil cylinders of the bottom lifting mechanism are symmetrically distributed on two sides of the lifting plate; meanwhile, an upper guide plate fixedly connected with the rack is arranged above the lifting plate, a lower fixed plate fixedly connected with the rack is arranged below the lifting plate, a guide pillar movably sleeved with the lifting plate is arranged between the upper guide plate and the lower fixed plate, and a connecting rod on the lifting plate penetrates through a guide hole in the guide plate and then is connected with the lifting strip.

9. The plastic double-station injection molding machine of claim 7, wherein: the die sinking mechanism also comprises a stop mechanism positioned above the sliding plate; the stop mechanism comprises a positioning frame, the rear end of the positioning frame is fixed on the rack, the front end of the positioning frame is a free end, two sides of the top end of the free end are respectively provided with a roller, and the axes corresponding to the two rollers are deviated from the inner supporting rod on the upper forming template by a certain distance towards the back.

10. The plastic double-station injection molding machine of claim 6, wherein: the shape of the gate is arranged to be a shape like a Chinese character ' mi ', an I ' shape, or a cross shape.