CN214773516U - Correlation injection molding machine - Google Patents

Abstract

The application discloses correlation injection molding machine: comprises a frame, a mold locking device and an injection device; the injection device comprises a first injection unit and a second injection unit, the injection device and the mold locking device are installed on the rack, the mold locking device is arranged between the first injection unit and the second injection unit, the mold locking device comprises a first template, a second template and a third template, a first mold is installed between the first template and the third template, a second mold is installed between the second template and the third template, one of the three templates is fixedly installed on the rack, and the template which is not fixedly installed on the rack is connected with the rack in a sliding manner. The injection molding machine of the application keeps the same with two conventional injection molding machines in productivity, but saves 1/3 in space occupation compared with two injection molding machines, and simultaneously can reduce the manufacturing cost of the injection molding machine and ensure the mold closing precision.

Description

Correlation injection molding machine

Technical Field

The utility model relates to a field of moulding plastics especially relates to a correlation injection molding machine.

Background

An injection molding machine is also known as an injection molding machine or injection unit. The main molding equipment for making various shapes of plastic products from thermoplastic plastics or thermosetting plastics by using plastic molding dies is divided into vertical, horizontal and full-electric types, the injection molding machine can heat the plastics and apply high pressure to the molten plastics to inject the molten plastics to fill the die cavity, and most of the injection molding machines on the market are single-color injection molding machines and double-color opposite injection molding machines.

As is known, in the existing single-color injection molding technology, one injection molding machine is provided with a set of molds, and one injection molding machine is not only inefficient, but also needs to be provided with a plurality of injection molding machines for production when mass production is performed. The injection molding machine has a large occupancy rate of site space, the site space for arranging the injection molding machines is limited, when large batches of plastic products are produced, a plurality of injection molding machines are required to work simultaneously, and the requirements for site size and energy consumption cost are greatly increased.

Disclosure of Invention

For solving above-mentioned technical problem, this application provides a correlation injection molding machine solves big injection molding machine in batches and accounts for the big problem in place space, the utility model discloses be different from traditional injection molding machine, adopt three templates to carry out the production of moulding plastics, under the condition the same with the productivity of two traditional injection molding machines, a mode locking device and frame of two injection unit sharings, 1/3 will be saved in the occupation of land space, precision when can guaranteeing the compound die simultaneously.

In order to achieve the purpose, the application is realized by the following scheme: an injection molding machine comprises a frame, a mold locking device and an injection device; the injection device comprises a first injection unit and a second injection unit, the first injection unit, the second injection unit and the mold locking device are installed on the frame, the mold locking device is arranged between the first injection unit and the second injection unit, the mold locking device comprises a first mold plate, a second mold plate and a third mold plate, the first mold plate is close to the first injection unit, the second mold plate is close to the second injection unit, the third mold plate is arranged between the first mold plate and the second mold plate, an external first mold is installed between the first mold plate and the third mold plate, an external second mold is installed between the second mold plate and the third mold plate, one of the first mold plate, the second mold plate and the third mold plate is fixedly installed on the frame, the first mold plate, the second mold plate and the third mold plate are installed on the frame, and the first mold plate, the second mold plate and the mold locking device are installed on the frame, And one of the second template and the third template, which is not fixedly installed on the rack, is in sliding connection with the rack, and during operation, the first injection unit and the first template move in the same direction on the rack, or the second injection unit and the second template move in the same direction on the rack, so that the action of closing or opening the mold is completed.

Preferably, the mold locking device further comprises a pressurizing oil cylinder, a pull rod, a mold moving mechanism, a sliding foot mechanism and a brake mechanism, the first template is fixedly installed on the frame, the pressurizing oil cylinder is fixedly installed on the first template, one end of the pull rod penetrates through the first template and is connected with the pressurizing oil cylinder, the other end of the pull rod penetrates through the third template and the second template and is installed in the brake mechanism on the back of the second template, the sliding foot mechanism is further arranged at the bottom ends of the third template and the second template, and the mold moving mechanism is arranged between the first template and the third template and between the second template and the first template and is used for closing and opening the first mold and the second mold; the third template can move on the frame or the pull rod under the driving of the sliding foot mechanism, and the band-type brake mechanism is used for locking the pull rod and fixing the position of the second template after moving.

Preferably, the mold moving mechanism comprises a mold moving oil cylinder, a joint bearing, a positioning pin and a mold moving hinged support, one end of a piston rod of the mold moving oil cylinder is fixedly connected with one end of the joint bearing, the other end of the joint bearing is connected with the mold moving hinged support through the positioning pin, and the mold moving hinged support is fixedly connected to the third template.

Preferably, a first circular hole and a second circular hole are formed in the die-moving hinged support, the positioning pin comprises a first positioning pin and a second positioning pin, the knuckle bearing comprises a first knuckle bearing and a second knuckle bearing, the die-moving oil cylinder comprises a first die-moving oil cylinder and a second die-moving oil cylinder, the first die-moving oil cylinder is fixedly mounted on the first template, the second die-moving oil cylinder is fixedly mounted on the second template, a piston rod of the first die-moving oil cylinder is connected with one end of the first knuckle bearing, and the other end of the first knuckle bearing is mounted in the first circular hole through the first positioning pin; a piston rod of the second mold moving oil cylinder is connected with one end of the second knuckle bearing, and the other end of the second knuckle bearing is installed in the second round hole through the second positioning pin; the first mold moving oil cylinder drives the third template to translate, the second mold moving oil cylinder drives the second template to translate, and in the processes of mold closing and mold opening of the first mold and the second mold, mold closing and mold opening actions of the first mold and the second mold are synchronous.

Preferably, the runner mechanism includes runner, tapered iron, backing plate, baffle and adjusting screw, the bottom of runner sets up certain inclination, the tapered iron also have certain inclination and with the runner adaptation, the backing plate fixed mounting be in the bottom of tapered iron, the baffle is installed the runner front side, adjusting screw erection joint the baffle with the tapered iron.

Preferably, the sliding foot mechanism further comprises a transmission gear, a gear shaft, a driving motor and a rack, wherein the driving motor is fixedly installed on the inner side of the sliding foot, the gear shaft is fixedly connected to the driving motor, the gear shaft is meshed with the transmission gear, the rack is meshed with the transmission gear and the gear shaft, and the rack is fixedly connected with the inclined iron.

Preferably, a position signal generator is fixedly installed at each of the side center positions of the second template and the first template, two position signal receivers are fixedly installed at the side center position of the third template, and the position signal receivers receive signals sent by the position signal generators and judge whether the first template and the second template are at the same height as the center position of the third template.

Alternatively, the mode locking device comprises a pressurizing oil cylinder, a pull rod and a band-type brake mechanism, the pressurizing oil cylinder and the band-type brake mechanism are arranged on the same side of the second template, one end of the pull rod is fixedly connected to the first template, and the other end of the pull rod penetrates through the third template, the second template and the band-type brake mechanism in sequence and is connected to the pressurizing oil cylinder.

And simultaneously, the utility model also provides a control method of correlation injection molding machine, including the step:

s1, arranging a first template, a third template and a second template on a rack, wherein if the first template is fixedly arranged on the rack, the third template and the second template are connected with the rack in a sliding manner, a first injection unit is arranged at a position close to the first template, a second injection unit is arranged at a position close to the second template, and a first mold and a second mold which are arranged outside are respectively arranged at two sides of the third template;

s2, a position signal receiver on the third template receives a signal sent by a signal generator on the first template, judges whether the central positions of the third template and the first template are on the same horizontal height, and drives the sliding foot mechanism to adjust the height of the central position of the third template to be the same as the height of the central position of the first template; the position signal receiver on the third template receives the signal sent by the signal generator on the second template, judges whether the central positions of the second template and the third template are on the same horizontal height, and adjusts the height of the central position of the second template to be the same as the height of the central position of the third template;

s3, after the injection device finishes plasticizing, enabling the third template to translate towards the first template, enabling the second template to translate towards the third template, enabling the second injection unit on the side of the second template and the second template to synchronously move and keeping the relative positions of the second injection unit and the second template still at the same time, closing the first mold and the second mold on the two sides of the third template until the first mold and the second mold on the two sides of the third template are closed, enabling the mold closing actions of the first mold and the second mold to be synchronous, and locking a pull rod and fixing the positions of the second template and the third template by a brake mechanism;

s4, after the first mold and the second mold are closed, the first injection unit and the second injection unit simultaneously inject molten materials into the first mold and the second mold at a certain speed and pressure, and pressure maintaining and cooling are carried out on the inner portions of the mold cavities of the first mold and the second mold according to preset values;

and S5, after pressure maintaining and cooling are finished, unlocking the position of the second template, opening the mold, enabling the second injection unit, the second template and the third template on the side of the second template to move in the reverse direction of the first template, keeping synchronization in the moving process, ejecting a product when the third template and the second template reach preset positions, and enabling the injection device to start preplasticizing to finish injection molding in one period.

Compared with the prior art, the mode that two injection units share one rack is adopted, one set of mould is installed between every two templates, and the two injection units simultaneously inject two sets of moulds. Two sets of moulds are moulded plastics in same frame, break through the mode that the one shot mould plastics and produce a set of mould goods of tradition, because share a frame and a set of mode locking device, in space utilization and economic cost, are less than the consumption of two injection molding machines far away.

Compared with the existing double-color correlation injection molding machine, the bottom of the third template is not provided with the rotary table, and the sliding foot mechanism with adjustable height is adopted, so that the complexity of the machine is reduced, and the rotating time and the manufacturing cost of the rotary table are saved.

The position signal generators arranged on the first template and the second template and the position signal receiver arranged on the third template can judge whether the centers of the three templates are on the same horizontal height before injection molding and die assembly, so that the die assembly precision during injection molding can be improved; the sliding foot mechanism is adjusted by the motor, the gear and rack transmission mode is adopted, the precision of fine adjustment of the sliding foot can be improved, the operation complexity of workers is reduced, when one sliding foot mechanism is adjusted by one motor, the inclined irons on two sides of the sliding foot can keep synchronous displacement with the same precision, and the problem that the template is inclined due to inconsistent movement of the left inclined iron and the right inclined iron is avoided.

The mold-moving oil cylinder does not provide mold-locking force, so the diameter of the mold-moving oil cylinder is far smaller than that of the pressurizing oil cylinder, and the movement speed of the third template and the second template is favorably improved; through the oil feed speed of adjusting the mould moving oil cylinder, the moving speed of the first template relative to the second template and the moving speed of the third template relative to the second template enable the closing and opening of the two clamped moulds to be synchronous, and the mould opening can be stopped only by reaching a preset position in the mould opening process, so that the injection molding cycle can be accurately controlled, and the injection molding efficiency can be improved.

Drawings

FIG. 1 is a view of an apparatus of a correlation injection molding machine;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a cross-sectional view of the runner mechanism;

FIG. 4 is a schematic flow chart of the control method of the injection molding machine of the present application;

in the figure, 1, a frame; 2. a first injection unit; 2', a second injection unit; 3. a second template; 4. a third template; 5. a first template; 6. a band-type brake mechanism; 7. a runner mechanism; 8. a pull rod; 9. a booster cylinder; 10. a position signal generator; 11. a position signal receiver; 12. a mold moving mechanism; 13. a mould moving oil cylinder; 131. a first mold moving oil cylinder; 132. a second mold moving oil cylinder; 14. a mold moving piston rod; 141. a first mold moving piston rod; 142. a second mold moving piston rod; 41. a knuckle bearing; 411. a first joint bearing; 412. a second joint bearing; 42. moving a die and hinging seat; 43. positioning pins; 431. a first positioning pin; 432. a second positioning pin; 71. a sliding foot; 72. a wedge; 73. a base plate; 74. adjusting screws; 75. a baffle plate; 76. a rack; 77. a transmission gear; 78. a gear shaft;

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

As shown in fig. 1-3, the utility model discloses a correlation injection molding machine, which comprises a frame 1, a mold locking device and an injection device; the injection device comprises a first injection unit 2 and a second injection unit 2 ', the first injection unit 2, the second injection unit 2' and a mold locking device are arranged on a rack 1, the mold locking device is arranged between the first injection unit 2 and the second injection unit 2 ', the mold locking device comprises a first mold plate 5, a second mold plate 3 and a third mold plate 4, the first mold plate 5 is close to the first injection unit 2, the second mold plate 3 is close to the second injection unit 2', the third mold plate 4 is arranged between the first mold plate 5 and the second mold plate 3, an external first mold is arranged between the first mold plate 5 and the third mold plate 4, an external second mold is arranged between the second mold plate 3 and the third mold plate 4, one of the first mold plate 5, the second mold plate 3 and the third mold plate 4 is fixedly arranged on the rack 1, and the mold plate which is not fixedly arranged with the rack 1 in the first mold plate 5, the second mold plate 3 and the third mold plate 4 is connected with the rack 1 in a sliding way, during operation, the first injection unit 2 and the first mold plate 5 move in the same direction on the frame 1, or the second injection unit 2' and the second mold plate 3 move in the same direction on the frame 1, so as to complete the mold closing or opening.

According to a preferable scheme, as shown in fig. 1, the mold locking device further comprises a pressurizing oil cylinder 9, a pull rod 8, a mold moving mechanism 12, a sliding foot mechanism 7 and a brake mechanism 6, the first template 5 is fixedly installed on the frame 1, the pressurizing oil cylinder 9 is fixedly installed on the first template 5, one end of the pull rod 8 penetrates through the first template 5 and is connected with the pressurizing oil cylinder 9, the other end of the pull rod 8 penetrates through the third template 4 and the second template 3 and is installed in the brake mechanism 6 on the back of the second template 3, the sliding foot mechanisms 7 are further arranged at the bottom ends of the third template 4 and the second template 3, and the mold moving mechanism 12 is arranged between the first template 5 and the third template 4 and between the second template 3 and the first template 5 and is used for carrying out mold closing and mold opening on the first mold and the second mold; under the drive of the sliding foot mechanism 7, the third template 4 can move on the frame 1 or the pull rod 8, and the band-type brake mechanism 6 is used for locking the pull rod 8 and fixing the position of the second template 3 after moving.

In a preferred embodiment, as shown in fig. 1 and 2, the mold-moving mechanism 12 includes a mold-moving cylinder, a joint bearing 41, a positioning pin 43 and a mold-moving hinge seat 42, one end of a piston rod 14 of the mold-moving cylinder is fixedly connected to one end of the joint bearing 41, the other end of the joint bearing 41 is connected to the mold-moving hinge seat 42 through the positioning pin 43, and the mold-moving hinge seat 42 is fixedly connected to the third mold plate 4.

The die moving hinged support 42 is provided with a first circular hole and a second circular hole, the positioning pin 43 comprises a first positioning pin 43143 and a second positioning pin 43243, the knuckle bearing 41 comprises a first knuckle bearing 41141 and a second knuckle bearing 41241, the die moving oil cylinder comprises a first die moving oil cylinder 131 and a second die moving oil cylinder 132, the first die moving oil cylinder 131 is fixedly arranged on the first template 5, the second die moving oil cylinder 132 is fixedly arranged on the second template 3, a piston rod 14 of the first die moving oil cylinder 131 is connected with one end of the first knuckle bearing 41141, and the other end of the first knuckle bearing 41141 is arranged in the first circular hole through the first positioning pin 43143; the piston rod 14 of the second mold moving oil cylinder 132 is connected with one end of a second joint bearing 41241, and the other end of the second joint bearing 41241 is installed in the second circular hole through a second positioning pin 43243; the first mold moving oil cylinder 131 drives the third template 4 to translate, the second mold moving oil cylinder 132 drives the second template 3 to translate, and in the processes of closing and opening the first mold and the second mold, the actions of closing and opening the first mold and the second mold are synchronous.

Preferably, as shown in fig. 3, the shoe mechanism 7 includes a shoe 71, a wedge 72, a backing plate 73, a baffle 75 and an adjusting screw 74, wherein the bottom of the shoe 71 is provided with a certain slope, the wedge 72 is also provided with a certain slope and is adapted to the shoe 71, the backing plate 73 is fixedly installed at the bottom of the wedge 72, the baffle 75 is installed at the front side of the shoe 71, and the adjusting screw 74 is installed to connect the baffle 75 and the wedge 72.

The sliding foot mechanism 7 further comprises a transmission gear 77, a gear shaft 78, a driving motor and a rack 76, wherein the driving motor is fixedly arranged on the inner side of the sliding foot 71, the gear shaft 78 is fixedly connected to the driving motor, the gear shaft 78 is meshed with the transmission gear 77, the rack 76 is meshed with the transmission gear 77 and the gear shaft 78, and the rack 76 is fixedly connected with the oblique iron 72.

Preferably, as shown in fig. 1, a position signal generator 10 is fixedly installed at each of the side center positions of the second template 3 and the first template 5, two position signal receivers 11 are fixedly installed at the side center position of the third template 4, and the position signal receivers 11 receive signals sent by the position signal generators 10 and judge whether the first template 5 and the second template 3 are at the same height as the center position of the third template 4.

In a specific embodiment, before injection molding, the height position of the third mold plate 4 and the second mold plate 3 is adjusted, as shown in fig. 1, when the mold is installed at the left and right sides of the third mold plate 4, the position signal generator 10 on the first mold plate 5 sends out a signal, the signal is received by the position signal receiver 11 on the third mold plate 4 and judges whether the center positions of the third mold plate 4 and the first mold plate 5 are at the same height, at the moment, the driving motor drives the gear shaft 78 to rotate, the gear shaft 78 drives the transmission gear 77 to rotate, the left and right racks 76 respectively move to the left and right under the meshing of the gear shaft 78 and the transmission gear 77, the rack 76 drives the inclined iron 72 to move, and when the center positions of the third mold plate 4 and the first mold plate 5 are adjusted to the same height, screwing the adjusting screw 74 to fix the positions of the inclined iron 72 and the sliding foot 71 to complete the height adjustment of the position of the third template 4; then, a position signal generator 10 on the second template 3 sends out a signal, the signal is received by a position signal receiver 11 on the third template 4, whether the central positions of the third template 4 and the second template 3 are at the same height is judged, at the moment, the driving motor is started to drive a gear shaft 78 to rotate, the gear shaft 78 drives a transmission gear 77 to rotate, a left rack 76 and a right rack 76 respectively move leftwards and rightwards under the meshing of the gear shaft 78 and the transmission gear 77, the rack 76 drives an inclined iron 72 to move, when the central positions of the third template 4 and the first template 5 are adjusted to be at the same height, an adjusting screw 74 is screwed, the positions of the inclined iron 72 and a sliding foot 71 are fixed, and the height adjustment of the position of the second template 3 is completed;

the mold closing is started, as shown in fig. 1, the first mold moving cylinder 131 is driven to drive the first mold moving piston rod 141 to move, the first mold moving piston rod 141 and the third mold plate 4 are fixed, the third mold plate 4 also moves along with the first mold moving piston rod 141, meanwhile, the second mold moving cylinder 132 is driven, the second mold moving cylinder 132 is fixed on the second mold plate 3, the second mold plate 3 can slide on the frame 1, the second mold plate 3 moves towards the third mold plate 4 under the pulling of the second mold moving piston rod 142, and at the moment, the moving speeds of the third mold plate 4 and the second mold plate 3 are adjusted to enable the mold closing of the two clamped molds to be synchronous, namely, the mold closing of the third mold plate 4 and the first mold plate 5 and the mold closing of the third mold plate 4 and the second mold plate 3 are completed simultaneously;

after the mold closing is completed, as shown in fig. 1, the position of the second template 3 and the position of the third template 4 are fixed by the contracting brake mechanism 6; and then, the first injection unit 2 and the second injection unit 2' respectively perform injection molding in the two pairs of molds, mold opening is performed after pressure maintaining and cooling, mold opening action and unlocking action of the band-type brake mechanism 6 are just opposite to the former action, and the moving speeds of the third template 3 and the second template 3 are adjusted to enable the mold closing of the two clamped molds to be synchronous until the third template 4 and the second template 3 reach preset positions, so that a product is ejected out, and one period of injection molding is completed.

According to a supplementary scheme, the mold locking device comprises a pressurizing oil cylinder 9, a pull rod 8 and a band-type brake mechanism 6, the pressurizing oil cylinder 9 and the band-type brake mechanism 6 are arranged on the same side of the second template 4, one end of the pull rod 8 is fixedly connected to the first template 5, and the other end of the pull rod penetrates through the third template 4, the second template 3 and the band-type brake mechanism 6 in sequence and is connected to the pressurizing oil cylinder 9.

Referring to fig. 4, fig. 4 is a schematic flow chart of a control method of a three-plate injection molding machine according to the present application, and as shown in the figure, the method includes the steps of:

s1, arranging a first template 5, a third template 4 and a second template 3 on a rack 1, if the first template 5 is fixedly arranged on the rack 1, the third template 4 and the second template 3 are connected with the rack 1 in a sliding manner, a first injection unit 2 is arranged at a position close to the first template 5, a second injection unit 2' is arranged at a position close to the second template 3, and a first mold and a second mold which are arranged outside are respectively arranged at two sides of the third template 4;

s2, a position signal receiver 11 on the third template 4 receives a signal sent by a signal generator on the first template 5, judges whether the central positions of the third template 4 and the first template 5 are on the same horizontal height, and drives a sliding foot mechanism 7 to adjust the height of the central position of the third template 4 to be the same as the height of the central position of the first template 5; a position signal receiver 11 on the third template 4 receives a signal sent by a signal generator on the second template 3, judges whether the central positions of the second template 3 and the third template 4 are on the same horizontal height, and adjusts the height of the central position of the second template 3 to be the same as the height of the central position of the third template 4;

s3, after the injection device finishes plasticizing, enabling a third template 4 to translate towards a first template 5, enabling a second template 3 to translate towards the third template 4, enabling a second injection unit 2' on the side of the second template 3 and the second template 3 to synchronously move and keeping the relative positions static at the same time, until a first mold and a second mold on two sides of the third template 4 are closed, the mold closing actions of the first mold and the second mold are synchronous, and locking a pull rod 8 and fixing the positions of the second template 3 and the third template 4 by a band-type brake mechanism 6;

s4, after the first mold and the second mold are closed, the first injection unit 2 and the second injection unit 2' simultaneously inject the molten material into the first mold and the second mold at a certain speed and pressure, and pressure-maintaining cooling is carried out on the inner portions of the mold cavities of the first mold and the second mold according to a preset value;

and S5, after pressure maintaining and cooling are finished, unlocking the position of the second template 3, starting mold opening, enabling the second injection unit 2' on the side of the second template 3, the second template 3 and the third template 4 to move in the reverse direction of the first template 5, keeping synchronization in the moving process, ejecting a product when the third template 4 and the second template 3 reach preset positions, and simultaneously enabling the injection device to start preplasticizing to finish injection molding in one period.

In summary, the injection molding machine is different from the existing single-color injection molding machine and the existing double-color correlation machine, two injection units are arranged on the same frame, and the movable third template and the movable second template are arranged at the same time, so that the space cost is far lower than that of two injection molding machines with the same production force, and the injection molding efficiency is obviously improved; the inclined irons on the two sides of the sliding foot mechanism are driven by the motor and the gear, so that the problem of insufficient manual operation precision is avoided, the operation difficulty of adjusting the height of the sliding foot is reduced, and the precision of die assembly is increased; through the speed of controlling the mould moving oil cylinder, in the processes of mould closing and mould opening, the moving speed of the third template relative to the first template is equal to the moving speed of the second template relative to the third template, so that the mould closing and mould opening of the first mould and the second mould are synchronous, the injection molding cycle is controlled accurately, and the injection molding efficiency is improved.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (8)

1. An injection molding machine, its characterized in that: comprises a frame, a mold locking device and an injection device; the injection device comprises a first injection unit and a second injection unit, the first injection unit, the second injection unit and the mold locking device are installed on the frame, the mold locking device is arranged between the first injection unit and the second injection unit, the mold locking device comprises a first mold plate, a second mold plate and a third mold plate, the first mold plate is close to the first injection unit, the second mold plate is close to the second injection unit, the third mold plate is arranged between the first mold plate and the second mold plate, an external first mold is installed between the first mold plate and the third mold plate, an external second mold is installed between the second mold plate and the third mold plate, one of the first mold plate, the second mold plate and the third mold plate is fixedly installed on the frame, the first mold plate, the second mold plate and the third mold plate are installed on the frame, and the first mold plate, the second mold plate and the mold locking device are installed on the frame, And one of the second template and the third template, which is not fixedly installed on the rack, is in sliding connection with the rack, and during operation, the first injection unit and the first template move in the same direction on the rack, or the second injection unit and the second template move in the same direction on the rack, so that the action of closing or opening the mold is completed.

2. The inj ection injection molding machine of claim 1, wherein: the mold locking device further comprises a pressurizing oil cylinder, a pull rod, a mold moving mechanism, a sliding foot mechanism and a brake mechanism, the first template is fixedly installed on the frame, the pressurizing oil cylinder is fixedly installed on the first template, one end of the pull rod penetrates through the first template and is connected with the pressurizing oil cylinder, the other end of the pull rod penetrates through the third template and the second template and is installed in the brake mechanism on the back face of the second template, the sliding foot mechanism is further arranged at the bottom ends of the third template and the second template, and the mold moving mechanism is arranged between the first template and the third template and between the second template and the first template and is used for closing and opening the first mold and the second mold; under the drive of the sliding foot mechanism, the third template can move on the rack or the pull rod, and the band-type brake mechanism locks the pull rod and fixes the position of the second template after moving.

3. A butt injection molding machine according to claim 2, further characterized by: the mould moving mechanism comprises a mould moving oil cylinder, a joint bearing, a positioning pin and a mould moving hinged support, one end of a piston rod of the mould moving oil cylinder is fixedly connected with one end of the joint bearing, the other end of the joint bearing is connected with the mould moving hinged support through the positioning pin, and the mould moving hinged support is fixedly connected to the third template.

4. A butt injection molding machine according to claim 3, further characterized by: the die moving hinge seat is provided with a first circular hole and a second circular hole, the positioning pin comprises a first positioning pin and a second positioning pin, the joint bearing comprises a first joint bearing and a second joint bearing, the die moving oil cylinder comprises a first die moving oil cylinder and a second die moving oil cylinder, the first die moving oil cylinder is fixedly arranged on the first template, the second die moving oil cylinder is fixedly arranged on the second template, a piston rod of the first die moving oil cylinder is connected with one end of the first joint bearing, and the other end of the first joint bearing is arranged in the first circular hole through the first positioning pin; a piston rod of the second mold moving oil cylinder is connected with one end of the second knuckle bearing, and the other end of the second knuckle bearing is installed in the second round hole through the second positioning pin; the first mold moving oil cylinder drives the third template to translate, the second mold moving oil cylinder drives the second template to translate, and in the processes of mold closing and mold opening of the first mold and the second mold, mold closing and mold opening actions of the first mold and the second mold are synchronous.

5. A butt injection molding machine according to claim 2, further characterized by: the sliding foot mechanism comprises a sliding foot, an inclined iron, a base plate, a baffle and an adjusting screw, wherein the bottom of the sliding foot is provided with a certain inclination, the inclined iron also has a certain inclination and is matched with the sliding foot, the base plate is fixedly installed at the bottom of the inclined iron, the baffle is installed at the front side of the sliding foot, and the adjusting screw is connected with the baffle and the inclined iron.

6. A butt injection molding machine according to claim 5, further characterized by: the sliding foot mechanism further comprises a transmission gear, a gear shaft, a driving motor and a rack, wherein the driving motor is fixedly installed on the inner side of the sliding foot, the gear shaft is fixedly connected to the driving motor, the gear shaft is meshed with the transmission gear, the rack is meshed with the transmission gear and the gear shaft, and the rack is fixedly connected with the inclined iron.

7. A correlation injection molding machine as defined in claim 1, further characterized by: the mould locking device comprises a pressurizing oil cylinder, a pull rod and a band-type brake mechanism, wherein the pressurizing oil cylinder and the band-type brake mechanism are arranged on the same side of the second template, one end of the pull rod is fixedly connected to the first template, and the other end of the pull rod penetrates through the third template, the second template and the band-type brake mechanism and is connected to the pressurizing oil cylinder.

8. A correlation injection molding machine as defined in claim 1, further characterized by: the side center positions of the second template and the first template are respectively and fixedly provided with a position signal generator, the side center position of the third template is fixedly provided with two position signal receivers, and the position signal receivers receive signals sent by the position signal generators and judge whether the first template and the second template are at the same height with the center position of the third template.

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