阅读说明：本技术 可自动换模的挤压机 (Extruder capable of automatically changing die ) 是由 何超 刘峰 于 2021-04-26 设计创作，主要内容包括：本发明公开了一种可自动换模的挤压机,包括用于装夹工件的工件夹紧机构、用于对工件进行挤压成型的挤压成型机构、用于自动更换模具的自动换模机构；所述自动换模机构包括背板,以及设置在背板上并可沿背板相对运动的模具安装板；所述模具安装板上设置有若干模具安装位,所述模具安装板与背板之间的相对运动可将模具安装位运转至挤压工位上。具有上述结构的挤压机,通过一台挤压设备实现多种模具的挤压成型,避免了工件在多台挤压设备之间流转、重新装夹等问题,提高了工件成型的质量,节约生产时间,提高了生产效率,降低了工人的劳动强度。(The invention discloses an extruder capable of automatically changing dies, which comprises a workpiece clamping mechanism for clamping a workpiece, an extrusion forming mechanism for carrying out extrusion forming on the workpiece, and an automatic die changing mechanism for automatically changing dies; the automatic die changing mechanism comprises a back plate and a die mounting plate which is arranged on the back plate and can move along the back plate relatively; the die mounting plate is provided with a plurality of die mounting positions, and the die mounting positions can be operated to the extrusion station through relative movement between the die mounting plate and the back plate. The extrusion machine with the structure realizes extrusion molding of various dies through one extrusion device, avoids the problems of circulation, re-clamping and the like of workpieces among multiple extrusion devices, improves the quality of workpiece molding, saves production time, improves production efficiency and reduces the labor intensity of workers.)

1. The utility model provides a but extruder of automatic die change which characterized in that: the automatic die changing mechanism comprises a workpiece clamping mechanism for clamping a workpiece, an extrusion forming mechanism for carrying out extrusion forming on the workpiece, and an automatic die changing mechanism for automatically changing a die;

the automatic die changing mechanism comprises a back plate and a die mounting plate which is arranged on the back plate and can move along the back plate relatively; the die mounting plate is provided with a plurality of die mounting positions, and the die mounting positions can be operated to the extrusion station through relative movement between the die mounting plate and the back plate.

2. The extruder of claim 1, wherein: the die mounting plate and the back plate can slide linearly relatively.

3. The extruder of claim 2, wherein: the die mounting plate is strip-shaped and also comprises a rack arranged along the sliding direction of the die mounting plate; the back plate is provided with a driving gear meshed with the rack, and the driving gear is driven to rotate by a driving device.

4. The extruder of claim 2, wherein: the driving device is a servo motor.

5. The extruder of claim 2, wherein: a plurality of sliding blocks for bearing the die mounting plate are arranged on the back plate along the sliding direction of the die mounting plate, and sliding grooves are formed in the sliding blocks; a rolling bearing is arranged in the sliding groove.

6. The extruder of claim 1, wherein: the workpiece clamping mechanism comprises a workbench, and a slide rail and a left clamping chuck and a right clamping chuck are arranged on the workbench; at least one of the left clamping chuck and the right clamping chuck can slide along the slide rail; the left clamping chuck and the right clamping chuck can be mutually closed and spliced to form the shape of the workpiece under the driving of the driving device; the clamping chuck is used for clamping a workpiece, and the clamping chuck is used for clamping the workpiece; the proximity switch and the pressure sensor are connected with the controller; the driving device is a clamping oil cylinder and further comprises a hydraulic station for controlling the clamping oil cylinder to stretch.

7. The extruder of claim 6, wherein: and the two ends of a piston rod of the clamping oil cylinder extend out of a clamping oil cylinder body, one end of the clamping oil cylinder body is fixed with the clamping chuck, and the other end of the clamping oil cylinder body is provided with an adjusting nut in threaded fit with the clamping chuck.

8. The extruder of claim 1, wherein: the extrusion forming device comprises a fixed die holder which is arranged on the back of the workbench and communicated with a central hole on the workbench; the die sleeve structure is characterized by also comprising a die sleeve moving plate and a plurality of openable die cylinders arranged on the die sleeve moving plate, wherein the die cylinders are driven to open and close by a driving device; the die sleeve moving plate is movably arranged and can convey the die cylinder into the fixed die holder so that the die cylinder is spliced with the fixed die holder; the mould fixing device also comprises a movably arranged mould mounting plate, wherein a mould is fixed on the mould mounting plate; the die mounting plate is driven by the extrusion driving device, and can convey a die into the die cylinder to extrude and form a workpiece.

9. The die-automatically exchangeable extruder as set forth in claim 8, wherein: the fixed die holder is vertically arranged, and the die sleeve moving plate is parallel to the fixed die holder; the die cylinder is a die cylinder I and a die cylinder II which are arranged in the vertical direction; a horizontal guide rod which is horizontally arranged is fixed on the workbench, and the die sleeve moving plate can slide left and right along the horizontal guide rod; the die sleeve moving plate is driven to move by a horizontally arranged quick die cylinder; the die cylinder I and the die cylinder II are respectively fixed on the upper moving die sleeve and the lower moving die sleeve and also comprise vertical guide rods which are vertically arranged, and the moving die sleeves can slide along the vertical guide rods; the driving device is a clamping die cylinder which is fixedly connected with the upper movable die sleeve and the lower movable die sleeve respectively.

10. The die-automatically exchangeable extruder as set forth in claim 8, wherein: the die mounting plate can slide along the extrusion guide rod; the extrusion driving device is an extrusion oil cylinder arranged behind the die mounting plate.

Technical Field

The invention relates to an extruding machine, in particular to an extruding machine capable of automatically replacing a die.

Background

An extruder is a device for forming a workpiece by extrusion. The extrusion molding of a common workpiece needs multiple times of extrusion by multiple dies to finally complete the molding work. The existing extruders therefore suffer from the following problems:

1. and a plurality of sets of equipment have large investment, high energy consumption and huge occupied space.

2. The personnel allocation is more, and one procedure needs to be matched with one or two persons.

3. The production rhythm is very slow, for example, a product needs four working procedures, and raw materials need to be transferred and clamped four times.

4. The positioning precision is poor, and products need to be clamped again in the transferring process of each procedure, so that accumulated errors are caused.

5. The automation degree is too low, the operation is complex, the manual labor time of workers is long, and the productivity efficiency is influenced.

Disclosure of Invention

In view of the above, the present invention provides an extruding machine capable of automatically changing dies, which can realize extrusion molding by automatically changing dies.

In order to solve the technical problems, the technical scheme of the invention is as follows: an extruder capable of automatically changing dies comprises a workpiece clamping mechanism for clamping workpieces, an extrusion forming mechanism for carrying out extrusion forming on the workpieces, and an automatic die changing mechanism for automatically changing dies; the automatic die changing mechanism comprises a back plate and a die mounting plate which is arranged on the back plate and can move along the back plate relatively; the die mounting plate is provided with a plurality of die mounting positions, and the die mounting positions can be operated to the extrusion station through relative movement between the die mounting plate and the back plate.

As an improvement, the die mounting plate and the back plate can slide linearly relative to each other.

As an improvement, the die mounting plate is strip-shaped, and the die mounting plate further comprises a rack arranged along the sliding direction of the die mounting plate; the back plate is provided with a driving gear meshed with the rack, and the driving gear is driven to rotate by a driving device. The gear and the rack are matched to drive the die mounting plate to move, so that the movement precision is higher.

Preferably, the driving device is a servo motor. The servo motor can be programmed to realize accurate control, so that each die on the die mounting plate can accurately stop on the extrusion station.

Preferably, a plurality of sliding blocks for bearing the die mounting plate are arranged on the back plate along the sliding direction of the die mounting plate, and sliding grooves are formed in the sliding blocks; a rolling bearing is arranged in the sliding groove.

As an improvement, the workpiece clamping mechanism comprises a workbench, and a slide rail and a left clamping chuck and a right clamping chuck are arranged on the workbench; at least one of the left clamping chuck and the right clamping chuck can slide along the slide rail; the left clamping chuck and the right clamping chuck can be mutually closed and spliced to form the shape of the workpiece under the driving of the driving device; the clamping chuck is used for clamping a workpiece, and the clamping chuck is used for clamping the workpiece; the proximity switch and the pressure sensor are connected with the controller; the driving device is a clamping oil cylinder and further comprises a hydraulic station for controlling the clamping oil cylinder to stretch. The automatic clamping of the workpiece in place is realized by utilizing the proximity switch and the pressure sensor, a preset clamping force is provided, manual operation is not needed, and the automatic clamping device is convenient and fast.

Preferably, the two ends of the piston rod of the clamping cylinder extend out of the cylinder body of the clamping cylinder, one end of the clamping cylinder is fixed with the clamping chuck, and the other end of the clamping cylinder is provided with an adjusting nut in threaded fit with the clamping chuck. The extending length of the clamping chuck section can be adjusted by adjusting the position of the nut on the piston rod, so that the clamping chuck section can be adapted to workpieces of different specifications and sizes.

As an improvement, the extrusion forming device comprises a fixed die holder which is arranged on the back of the workbench and communicated with a central hole on the workbench; the die sleeve structure is characterized by also comprising a die sleeve moving plate and a plurality of openable die cylinders arranged on the die sleeve moving plate, wherein the die cylinders are driven to open and close by a driving device; the die sleeve moving plate is movably arranged and can convey the die cylinder into the fixed die holder so that the die cylinder is spliced with the fixed die holder; the mould fixing device also comprises a movably arranged mould mounting plate, wherein a mould is fixed on the mould mounting plate; the die mounting plate is driven by the extrusion driving device, and can convey a die into the die cylinder to extrude and form a workpiece. The whole extrusion forming process is automatically completed without manual intervention, the working efficiency is high, the production quality is stable, the labor intensity of workers is greatly reduced, the labor cost is saved, and the economic benefit is improved.

As an improvement, the fixed die holder is vertically arranged, and the die sleeve moving plate is parallel to the fixed die holder; the die cylinder is a die cylinder I and a die cylinder II which are arranged in the vertical direction; a horizontal guide rod which is horizontally arranged is fixed on the workbench, and the die sleeve moving plate can slide left and right along the horizontal guide rod; the die sleeve moving plate is driven to move by a horizontally arranged quick die cylinder; the die cylinder I and the die cylinder II are respectively fixed on the upper moving die sleeve and the lower moving die sleeve and also comprise vertical guide rods which are vertically arranged, and the moving die sleeves can slide along the vertical guide rods; the driving device is a clamping die cylinder which is fixedly connected with the upper movable die sleeve and the lower movable die sleeve respectively.

As an improvement, the die mounting plate further comprises an extrusion guide rod which is horizontally arranged, and the die mounting plate can slide along the extrusion guide rod; the extrusion driving device is an extrusion oil cylinder arranged behind the die mounting plate.

The invention has the advantages that: the extrusion machine with the structure realizes extrusion molding of various dies through one extrusion device, avoids the problems of circulation, re-clamping and the like of workpieces among multiple extrusion devices, improves the quality of workpiece molding, saves production time, improves production efficiency and reduces the labor intensity of workers.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the workpiece clamping mechanism.

Fig. 3 is a top view of the workpiece clamping mechanism.

Fig. 4 is a sectional view of the extrusion molding mechanism.

Fig. 5 is a schematic view of an extrusion molding mechanism.

Fig. 6 is a schematic view of an automatic mold changing mechanism.

Fig. 7 is a schematic view of an automatic mold changing mechanism.

The labels in the figure are: 101, 102, 103, 104, 105, 106, 107, 108, 109, 110 and 110.

202 fixed die holder, 203 die sleeve moving plate, 204 clamping die cylinder, 205 quick die cylinder, 206 horizontal guide rod, 207 vertical guide rod, 208 moving die sleeve, 209 extrusion guide rod, 211 die mounting plate, 212 extrusion oil cylinder, 213 die cylinder, 214 controller, 215 servo system, 216 hydraulic station

301 backplate, 302 mould mounting plate, 303 groove, 304 rack, 305 sliding block, 306 rolling bearing, 307 limiting block, 308 drive gear, 309 servo motor, 310 speed reducer.

400 base, 500 work pieces.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

As shown in fig. 1-7, the present invention includes a workpiece clamping mechanism for clamping a workpiece, an extrusion molding mechanism for extrusion molding the workpiece, and an automatic die changing mechanism for automatically changing a die. The above mechanisms are all fixed to the base 400.

Specifically, the workpiece clamping mechanism comprises a workbench 101, and a slide rail 102 and a left clamping chuck 104 and a right clamping chuck 104 are arranged on the workbench 101; specifically, the workbench 101 has a rectangular hollow, and the two slide rails 102 are arranged at the opposite sides of the hollow, which are parallel to each other. The clamping device further comprises a sliding block 103 which is matched with the sliding rail 102 to slide, and the clamping chuck 104 is arranged on the sliding block 103.

At least one of the left and right clamping chucks 104 can slide along the slide rail 2; the clamping device further comprises a driving device for driving the clamping chucks 104 to slide along the slide rails 102, and the left and right clamping chucks 104 can be mutually closed and spliced to form the shape of the workpiece 500 under the driving of the driving device; the shape of the workpiece 500 may be varied, and one skilled in the art may adapt the clamping chuck 104 for different workpieces 500, without limitation.

A proximity switch 110 for sensing the workpiece 500 and a pressure sensor for detecting the pressure applied by the clamping chuck 104 to the workpiece 500; the proximity switch 110 and pressure sensor are connected to a controller 214.

In this embodiment, the drive means is a clamping cylinder 105, and it is therefore foreseen to further comprise a hydraulic station 216 for controlling the extension and retraction of the clamping cylinder 105. Preferably, the left and right clamping chucks 104 can slide along the slide rail 102, and the left and right clamping cylinders 105 are provided. For convenience of fixing, mounting bases 109 for mounting the clamping cylinders 105 are provided on both sides of the table 101.

In addition, in this embodiment, the two ends of the piston rod of the clamping cylinder 105 extend out of the cylinder body of the clamping cylinder 105, one end of the piston rod is fixed with the clamping chuck 104, and the other end of the piston rod is provided with an adjusting nut 106 in threaded fit with the clamping chuck.

The pressure sensor may be disposed within the clamp cylinder 105. A mold mounting plate 302 is disposed behind the table 101, and the proximity switch 110 may be disposed on the mold mounting plate 302.

During work, the clamping chuck 104 is in an open state, the workpiece 500 enters the clamping chuck 104 at the moment, the proximity switch 110 detects the workpiece 500 and transmits a signal to the controller, the controller opens the control valve of the hydraulic station 216, the clamping oil cylinder 105 is pushed by power hydraulic oil, and the sliding block 103 and the sliding rail 102 are matched to automatically clamp the clamping chuck 104. After the clamping chuck 104 is clamped to the pressure set by the system, the operation is stopped, the workpiece 500 is kept in a clamped state, after the belt product is processed, the control valve of the hydraulic station 216 is opened, the clamping oil cylinder 105 is pushed to retract through power hydraulic oil, the clamping chuck 104 is automatically loosened to the pressure set by the system, the operation is stopped, the workpiece 500 is taken out, and a cycle is completed.

The extrusion forming mechanism comprises a fixed die holder 202 which is arranged on the back of the workbench 101 and communicated with a central hole of the workbench 101; the die sleeve structure further comprises a die sleeve moving plate 203 and a plurality of openable die cylinders 213 arranged on the die sleeve moving plate 203, wherein the die cylinders 213 are driven to open and close by a driving device; the die sleeve moving plate 203 is movably arranged, and can convey the die cylinder 213 into the fixed die holder 202 so that the die cylinder 213 is spliced with the fixed die holder 202; the device also comprises a movably arranged mould mounting plate 302, wherein a mould (not shown in the figure) is fixed on the mould mounting plate 302; the die mounting plate 302 is driven by an extrusion driving device, and can convey a die into the die cylinder 213 to extrude the workpiece 500. In this embodiment, the fixed die holder 202 is vertically arranged, and the die sleeve moving plate 203 is parallel to the fixed die holder 202; the cylinder 213 is a cylinder I and a cylinder II arranged in the up-down direction.

Specifically, a horizontal guide rod 206 is fixed on the table 101, and the sleeve moving plate 203 can slide left and right along the horizontal guide rod 206. The horizontal guide rods 206 are 4 ones arranged along four corners of the sleeve moving plate 203. The sleeve moving plate 203 is driven to move by a horizontally disposed quick cylinder 205. The number of the rapid cylinders 205 is 2 in the left-right direction.

The die cylinder I and the die cylinder II are respectively fixed on an upper movable die sleeve 208 and a lower movable die sleeve 208, the die cylinder I and the die cylinder II further comprise vertical guide rods 207 which are vertically arranged, and the movable die sleeves 208 can slide along the vertical guide rods 207. The driving device is a clamping die cylinder 204 fixedly connected with an upper moving die sleeve 208 and a lower moving die sleeve 208 respectively. The clamping cylinders 204 are arranged vertically.

The die mounting plate 302 can slide along the extrusion guide rods 209; the extrusion driving device is an extrusion cylinder 212 arranged behind the die mounting plate 302. And a heat insulation plate 217 is arranged between the extrusion oil cylinder and the die mounting plate 302. The extrusion guide bars 209 are 4 arranged along four corners of the die mounting plate 302.

In operation, the workpiece 500 is passed through the central hole and the rear end is clamped by the workpiece clamping mechanism. The clamping cylinder 204 drives the cylinder I and the cylinder II to close and clamp the dies. The fast mold cylinder 205 retracts to drive the mold sleeve moving plate 203 to move towards the fixed mold base 202 to be combined with the fixed mold base 202. Then the extrusion cylinder 212 drives the die mounting plate 302 to move towards the fixed die holder 202, and the die mounting plate is matched with the die cylinder 213 to extrude and form the workpiece 500. After the molding is finished, the extrusion oil cylinder 212 retracts, the quick die cylinder 205 extends to enable the die cylinder 213 to be separated from the fixed die holder 202, and then the upper clamping die cylinder 204 and the lower clamping die cylinder 204 retract to enable the die cylinder I and the die cylinder II to be separated to wait for the next extrusion.

The automatic die changing mechanism comprises a back plate 301 and a die mounting plate 302 which is arranged on the back plate 301 and can move along the back plate relatively; the die mounting plate 302 is provided with a plurality of die mounting positions, and the die mounting positions can be operated to the extrusion station through the relative movement between the die mounting plate 302 and the back plate 301. The die mounting position is a groove 303 arranged on the die mounting plate, and the groove 303 is matched with a lug on the back of the die; the bottom of the groove is provided with a central threaded hole. Backplate 301 is the I shape, and convenient change mould in breach department avoids the backplate to block the central screw hole behind the mould mounting panel.

In this embodiment, the mold mounting plate 302 and the back plate 301 can slide linearly, so that the mold mounting positions on the mold mounting plate 302 can be operated to the extrusion stations one by one. Of course, the die mounting plate 302 may be rotated like a turntable, or may be moved in other ways, as long as the die mounting positions are moved one by one to the extrusion station. To ensure that each die mounting station can be operated to the extrusion station, a plurality of die mounting stations should be arranged along the direction of movement of the die mounting plate 302. Therefore, in this embodiment, the mold mounting positions are arranged along a straight line. In addition, in the embodiment, the number of the die mounting positions is 4, and the number of the die mounting positions can be adjusted according to the actual situation of workpiece processing, which is not limited in the invention.

Specifically, the mold mounting plate 302 is a strip, and further includes a rack 304 disposed along the sliding direction of the mold mounting plate 302; the back plate 301 is provided with a driving gear 308 engaged with the rack 304, and the driving gear 308 is driven by a driving device to rotate. The drive means is preferably a programmable servo motor 309. It is contemplated that a speed reducer 310 may be installed between the servo motor 309 and the driving gear 308 to increase the torque. Of course, the servo motor 309 needs to be connected to the servo system 215.

In order to make the sliding of the mold mounting plate 302 smoother, a plurality of sliding blocks 305 for bearing the mold mounting plate 302 are disposed on the back plate 301 along the sliding direction of the mold mounting plate 302, a sliding groove is formed on the sliding blocks 305, and a rolling bearing (not shown in the figure) is disposed in the sliding groove. The chute is used for limiting and guiding the mold mounting plate 302. In order to make the die mounting plate 302 slide more easily, rolling bearings 306 may be additionally provided on both sides of the slide block 305.

To prevent the mold mounting plate 302 from falling off the back plate 301, a stopper 307 may be provided on the back plate 301.

When the die is in work, different dies are sequentially arranged on the die mounting positions according to the process requirements and are fastened through bolts. The servo motor 309 drives the driving gear 308 to rotate, and the driving gear 308 drives the mold mounting plate 302 to move. When the first die is operated to the extrusion station, the servo motor 308 stops rotating, and the rear extrusion cylinder 212 drives the whole back plate 301 to move forward (from inside to outside of the paper surface in fig. 1) to complete the first extrusion molding. And then the extrusion oil cylinder 212 retracts, the servo motor 308 continues to drive the die mounting plate 302 to move, when a second die runs to an extrusion station, the second die stops, and meanwhile, the extrusion oil cylinder 212 drives the back plate 301 to move to complete second extrusion forming, and so on.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.