CN214773808U - Two-plate injection molding machine capable of electrically opening and closing mold - Google Patents

Abstract

The utility model relates to an electronic two board-like injection molding machines that open and shut the compound die, it includes frame, fixed die plate, movable mould board and opens and shuts the mould device, wherein opens and shuts the mould device and include clamping mechanism, shifting die mechanism and locking mechanism. On one hand, the utility model applies acting force to the mould through the middle mould locking high-pressure oil cylinder and the plurality of mould locking pull rods, so that the mould is closed under relatively uniform stress, and the mould closing precision is further improved; on the other hand, the mold moving and the mold locking can be carried out synchronously without pause, the process is simple and rapid, the positioning precision and the mold opening and closing repeated precision of the mold can be effectively improved, in addition, the mold locking pull rod can implement the mold opening and closing of the mold without reset action, so the action is coherent, and the idle cycle period (dry cycle) of the injection molding machine is also shortened.

Description

Two-plate injection molding machine capable of electrically opening and closing mold

Technical Field

The utility model belongs to the mould equipment field that opens and shuts of mould, concretely relates to two board-like injection molding machines of electronic open and shut mould.

Background

At present, a hydraulic transmission mode is generally adopted in the mold closing process of a two-plate injection molding machine, wherein the mold closing process comprises a mold moving process and a mold locking process (also called a band-type brake), specifically, a mold moving oil cylinder is adopted to push a template to move, the mold moving oil cylinder stops after reaching the position of the band-type brake through position control, a band-type brake oil cylinder drives a flashboard to be locked and fixed on a pull rod thread of a high-pressure oil cylinder, and then the mold is locked through the high-pressure oil cylinder.

Obviously, the above-mentioned mold clamping process has the following disadvantages:

1) the precision of the mold moving oil cylinder is limited, so that the positioning precision of the mold and the repeated precision of opening and closing the mold are reduced;

2) the opening and closing of the mold moving oil cylinder and the flashboard are separately and independently implemented in the mold closing process, so that the idle cycle period (dry cycle) of the injection molding machine is increased;

3) the mold locking pull rods are oil cylinder mandrels and four mold locking pull rods are arranged on the market, wherein the cylinder body is locked on the mold locking head plate, so that the mold locking pull rods need to reset from the view of manufacturing process, the mold opening and closing are inconvenient to implement, and meanwhile, the stress of the mold is four-point type pull rod tensile force, and the uniform stress cannot be ensured, so the mold closing precision is influenced to a certain extent;

4) in the mould moving process, two quick oil cylinders are mostly used, so that the mould moving speed and the mould moving precision are difficult to control.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a two board-like injection molding machines of electronic open-close mould of modified.

In order to solve the technical problem, the utility model discloses the technical scheme who takes as follows:

a two-plate injection molding machine with electric mold opening and closing function comprises:

a machine base;

the fixed template is fixed at one end part of the machine base;

the movable template is arranged on the base and can slide oppositely relative to the fixed template;

the mold opening and closing device comprises a mold locking mechanism, a mold moving mechanism and a mold closing mechanism,

particularly, the mold locking mechanism comprises a plurality of mold locking pull rods which are fixed on the fixed mold plate and extend along the moving direction of the movable mold plate, mold locking nuts which are arranged on the movable mold plate and can be correspondingly matched with the mold locking pull rods one by one, and a mold locking power device which is used for driving the mold locking nuts to synchronously move and is relatively locked with or separated from the corresponding mold locking pull rods;

the mold moving mechanism is in transmission connection with the mold locking power device through a clutch, when the mold is moved, the clutch is in a separation state, and the mold locking pull rod can be movably inserted into the mold locking nut; when the mold is locked, the clutch is in a joint state, the mold locking power device and the mold moving mechanism move synchronously, and the mold locking pull rod rotates and is locked relative to the mold locking nut;

the mold closing mechanism is positioned on the movable mold plate and between the movable mold plate and the fixed mold plate, and comprises a power output part and a mold closing power device, wherein the direction of a mold closing force provided by the mold closing power device is the same as the direction of a pulling force provided by the mold locking pull rod corresponding to the movable mold plate, and the mold closing force and the pulling force are arranged in a region surrounded by the plurality of mold locking pull rods in parallel.

Preferably, the mold locking power device comprises a driving wheel coaxially connected with each mold locking nut, a synchronizing wheel connected with the clutch, and a synchronous transmission part for driving and connecting the driving wheels and the synchronizing wheel, wherein when the synchronizing wheel idles relative to the mold moving mechanism, the clutch is in a separation state; when the synchronizing wheel and the mold moving mechanism move synchronously, the clutch is in an engaged state. In this way, through the setting of clutch for the shifting die can go on with the mode locking in step, need not pause, and share a power supply. Meanwhile, the mold moving and mold locking are quickly connected, so that the process is simple and quick, the positioning precision and the mold opening and closing repetition precision of the mold can be effectively improved, and in addition, the idle cycle period (dry cycle) of the injection molding machine is also shortened.

Specifically, each driving wheel is connected with a corresponding mold locking nut and is positioned on the movable mold plate through a connecting sleeve; the synchronous transmission part is a synchronous belt, a connecting rod transmission part or a gear transmission part.

In this embodiment, the driving wheel and the synchronizing wheel are both gears, and the rack belt of the synchronizing belt is implemented to keep the displacement of the movable die plate consistent.

Of course, in consideration of the tightness of the synchronous belt, the movable die plate can be provided with the tensioning guide wheel, so that the synchronous transmission of a plurality of transmission wheels is realized more stably.

In this example, the number of teeth and the diameter of the transmission wheel and the synchronizing wheel are the same. The assembly is convenient, and the control of the consistent displacement is convenient.

According to a specific embodiment and preferred aspects of the present invention, a partitioned female thread engagement section is formed on an inner wall of each mold locking nut, and a partitioned male thread engagement section is formed on a corresponding mold locking tie rod, wherein the female thread engagement section and the male thread engagement section are engaged with each other relatively when the mold locking nut is locked with the mold locking tie rod; when the mode locking nut and the mode locking pull rod are unlocked, the internal thread meshing section and the external thread meshing section are staggered relatively. The engagement and the staggered implementation can ensure the stability of mold locking and mold opening and closing.

Preferably, the internal thread meshing section is provided with two sections which are correspondingly arranged on two opposite sides of the inner wall of the mold locking nut; the external thread meshing section is correspondingly arranged on two opposite sides of the mold locking pull rod, and after the mold locking nut rotates forwards or reversely for 90 degrees, the internal thread meshing section and the external thread meshing section are switched between a relative staggered state and a relative meshing state. The operation is convenient.

According to the utility model discloses a concrete implementation and preferred aspect, power take off spare is for setting up the mould mounting panel on the movable mould board, and the mode locking power ware is the mode locking high pressure cylinder that both ends are connected respectively between mould mounting panel and movable mould board, and wherein the center of mode locking high pressure cylinder and the center coincidence setting that a plurality of mode locking pull rods enclose into the region.

In the embodiment, four mold locking pull rods are distributed in a rectangular shape, and the center of the mold locking high-pressure oil cylinder is superposed with the center of the rectangle; the mould mounting plate is correspondingly provided with a notch or an avoiding hole which avoids the mould locking pull rod. The die locking high-pressure oil cylinder is arranged to match with the stress of the die locking pull rod, so that the stress uniformity of the die is ensured after die locking, and the die locking precision is ensured.

Or, be formed with the mould mounting panel on the movable mould board, the mould adapter sleeve between mould mounting panel and movable mould board is connected respectively at both ends, wherein the inside cavity of mould adapter sleeve is cyclic annular, and be formed with a plurality of spouts that extend along mode locking pull rod length direction on the mould adapter sleeve, the compound die power ware includes respectively with every spout cooperation and along the spout length direction slip set up the slide on the mould adapter sleeve, the thimble bar that sets up on the slide and can wear out the mould mounting panel, and be used for driving the power cylinder of slide motion between mould mounting panel and movable mould board, the thimble bar is along with the motion of power cylinder, support tightly or loosen the mould from the tip of wearing out the mould mounting panel.

According to the utility model discloses a concrete implementation and preferred aspect, the mould moving mechanism including set up the fixing base on fixed die plate or frame, cooperate with the fixing base and with mode locking pull rod parallel arrangement's lead screw and be used for driving the lead screw around self axial rotation and fix a position the mould moving power ware on the movable mould board. The transmission mode of the screw rod is adopted to further improve the stability and the accuracy of the mold moving and the mold locking, and it should be noted that, in this example, the forward displacement of the mold locking nut is as large as the forward displacement of the movable mold plate, that is to say: 1. the thread pitch of the mode locking nut is the same as the lead of the screw rod; 2. the driving wheel and the synchronous wheel have the same tooth number, but the two points can be different as long as the displacement is consistent.

Preferably, the screw is a ball screw, the mold moving power device comprises a driving motor and a coupler, the shaft axis of the driving motor is overlapped with the shaft axis of the ball screw, the coupler is used for connecting an output shaft of the driving motor with the end part, far away from the fixed seat, of the ball screw, and the clutch is arranged on the coupler or the output shaft.

Or the two ball screws are correspondingly arranged on two opposite sides of the fixed template and are distributed diagonally up and down; the mold moving power device comprises a driving motor, a transmission part and a clutch, wherein the driving motor is arranged with an axis line parallel to the ball screw, the transmission part is used for connecting an output shaft of the driving motor with the end part of the ball screw far away from the fixed seat, the clutch is arranged on the output shaft, the transmission part comprises an output wheel arranged on the output shaft, a transmission wheel arranged on the end part of the screw far away from the fixed seat, and a synchronous connecting piece is used for connecting the output wheel and the transmission wheel in the same step, and the synchronous connecting piece is a conveying belt, a connecting rod transmission piece or a gear transmission piece.

Furthermore, the transmission part also comprises a tension wheel, and the transmission wheel, the output wheel and the tension wheel are in transmission connection through the transmission belt.

Specifically, output wheel, transfer gear, take-up pulley also are the gear, and the conveyer belt also is the rack and pinion, and wherein output wheel and synchronizing wheel coaxial setting, and the output wheel is located the outside of synchronizing wheel, and so, the hold-in range just is located between conveyer belt and the movable mould board.

In addition, a slide rail is formed on the base, and the movable module is arranged on the slide rail in a sliding mode from the bottom.

In this example, there are two slide rails, and two are arranged in parallel, wherein the cross-section of each slide rail is i-shaped, and the bottom of the movable module is formed with a chute matched with the i-shaped.

Meanwhile, in the embodiment, the clutch is a jaw clutch, which is directly purchased from the market, and the principle of the clutch is not described and can be clearly implemented.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

on one hand, the utility model applies acting force to the mould through the mould closing force and the mould locking pulling force provided by the plurality of mould locking pull rods, so that the mould is closed under relatively uniform stress, and the mould closing precision is further improved; on the other hand, the mold moving and the mold locking can be carried out synchronously without pause, the process is simple and rapid, the positioning precision and the mold opening and closing repeated precision of the mold can be effectively improved, in addition, the mold locking pull rod can implement the mold opening and closing of the mold without reset action, so the action is coherent, and the idle cycle period (dry cycle) of the injection molding machine is also shortened.

Drawings

FIG. 1 is a schematic view of a structure of a two-plate injection molding machine in example 1;

FIG. 2 is a schematic front view of FIG. 1;

FIG. 3 is a schematic right-side view of FIG. 1;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 3;

FIG. 5 is a schematic top view of FIG. 1;

FIG. 6 is a schematic structural view of a two-plate injection molding machine according to embodiment 2;

FIG. 7 is a schematic front view of FIG. 6;

FIG. 8 is a left side schematic view of FIG. 6;

FIG. 9 is a schematic sectional view taken along line B-B in FIG. 8;

FIG. 10 is a top view of FIG. 6;

FIG. 11 is a schematic structural view of a two-plate injection molding machine according to embodiment 3;

FIG. 12 is a schematic right-side view of FIG. 11;

FIG. 13 is a schematic cross-sectional view (in part) taken along line C-C of FIG. 12;

wherein: 1. a machine base; 1a, an I-shaped sliding rail; 2. fixing a template; 2a, punching; 3. moving the template; 4. a mold opening and closing device; 40. a mold locking mechanism; 400. a mode locking pull rod; b. an external thread meshing section; 401. locking the mold nut; a. an internal thread engaging section; 402. a mold locking power device; a1, a driving wheel; a2, synchronizing wheel; a3, synchronous belt; t, connecting sleeves; a4, tensioning guide wheel; 41. a mold moving mechanism; 410. a fixed seat; 411. a screw rod; 412. a mould moving power device; b1, a drive motor; b2, a coupler; b3, a transmission component; b30, output wheel; b31, a conveying wheel; b32, a tension wheel; b33, a conveyor belt; 42. a mold clamping mechanism; 420. a power take-off; q, slot missing; c1, die mounting plate; c2, connecting sleeves of the molds; c20, a chute; c21, an arc; 421. a mold closing power unit; d1, a slider; d2, thimble rod; d3, a power cylinder; d4, connecting lugs; 43. a clutch; 5. a slide carriage.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Example 1

As shown in fig. 1, the two-plate injection molding machine with electric mold opening and closing of the present embodiment includes a machine base 1, a fixed mold plate 2, a movable mold plate 3, and a mold opening and closing device 4.

Specifically, frame 1 is the rectangle platform form, and fixed die plate 2 is fixed at the left end portion of frame 1, and the setting of moving die plate 3 along the translation of rectangle length direction is on frame 1, and mould device 4 that opens and shuts is used for driving the motion of moving die plate 3 in order to realize the mould that opens and shuts of mould.

Referring to fig. 2, i-shaped slide rails 1a are formed on two opposite sides of the base 1, and the bottom of the movable mold plate 3 is slidably disposed on the i-shaped slide rails 1a through a slide base 5.

In this example, the mold opening and closing device 4 includes a mold locking mechanism 40, a mold transfer mechanism 41, and a mold clamping mechanism 42, in which the mold transfer, mold clamping, and mold clamping are performed first.

Referring to fig. 3, the mold locking mechanism 40 includes four mold locking tie bars 400 fixed to the fixed mold plate 2 and extending along the moving direction of the movable mold plate 3, mold locking nuts 401 disposed on the movable mold plate 3 and capable of being fitted to each of the mold locking tie bars 400 in a one-to-one correspondence manner, and a mold locking power unit 402 for driving a plurality of mold locking nuts 401 to move synchronously and to be locked to or separated from the corresponding mold locking tie bars 400 relatively.

The mold moving mechanism 41 is in transmission connection with the mold locking power device 402 through the clutch 43, when the mold is moved, the clutch 43 is in a separation state, and the mold locking nut 401 can be used for the corresponding mold locking pull rod 400 to penetrate out; when the mold is locked, the clutch 43 is in an engaged state, the mold locking power unit 402 and the mold moving mechanism 41 move synchronously, and the mold locking tie rod 400 is locked with the corresponding mold locking nut 401.

The mold clamping mechanism 42 is located on the movable mold plate 3 and between the movable mold plate 3 and the fixed mold plate 2, and includes a power output member 420 and a mold clamping power unit 421, wherein the direction of the mold clamping force provided by the mold clamping power unit 421 is the same as the direction of the pulling force provided by the mold clamping pull rod 400 corresponding to the movable mold plate 3, and the mold clamping force and the mold clamping pull rod are arranged in parallel in the area surrounded by the mold clamping pull rods 400.

In this example, the power output member 420 is a mold mounting plate disposed on the movable mold plate 3, and the mold clamping power device 421 is a mold clamping high-pressure cylinder having two end portions connected between the mold mounting plate and the movable mold plate 3, wherein the mold clamping high-pressure cylinder is disposed parallel to the mold clamping tie rods 400 and is correspondingly disposed in the middle of an area surrounded by the four mold clamping tie rods 400.

Specifically, four mold locking pull rods 400 are distributed in a rectangular shape, each mold locking pull rod 400 extends along the length direction of the rectangle, and the center of the mold locking high-pressure oil cylinder 421 is overlapped with the center of the rectangle; the mold mounting plate 420 is correspondingly formed with a groove q avoiding the mold clamping bar 400. The die locking high-pressure oil cylinder is arranged to match with the stress of the die locking pull rod, so that the stress uniformity of the die is ensured after die locking, and the die locking precision is ensured.

In this embodiment, the mold locking high-pressure cylinder 421 has a large diameter and a small size, and mainly avoids the phenomenon that the mold locking is not in place, and the stroke is generally between 5 and 20 mm, which can be selected according to actual needs.

Therefore, one end of the mold clamping high-pressure cylinder 421 is fixed to the movable platen 3, and the other end is fixed to the middle of the mold mounting plate 420.

Meanwhile, the mold mounting plate 420 is convenient to move horizontally and mold, guide shoes are correspondingly formed at the bottom of the mold mounting plate 420, and guide rails are correspondingly arranged on the movable mold plate 3.

As shown in fig. 4, in this example, spaced female thread engagement sections a are formed on an inner wall of each mold locking nut 401, and male thread engagement sections b are formed on the corresponding mold locking tie rods 400, wherein the female thread engagement sections a and the male thread engagement sections b are engaged with each other when the mold locking nuts 401 are locked to the mold locking tie rods 400; when the mode locking nut 401 is unlocked from the mode locking tie rod 400, the internal thread meshing section a and the external thread meshing section b are relatively staggered. The engagement and the staggered implementation can ensure the stability of mold locking and mold opening and closing.

The internal thread meshing section a has two sections and is correspondingly arranged on two opposite sides of the inner wall of the mold locking nut 401; the external thread meshing sections b are correspondingly arranged on two opposite sides of the mode locking pull rod 400, wherein after the mode locking nut 401 rotates forwards or reversely for 90 degrees, the internal thread meshing section a and the external thread meshing section b are switched between a relative staggered state and a relative meshing state. The operation is convenient.

As shown in fig. 5, the clamping power unit 402 includes a driving wheel a1 coaxially connected to each clamping nut 401, a synchronizing wheel a2 connected to the clutch 43, and a synchronizing belt a3 drivingly connecting a plurality of driving wheels a1 to the synchronizing wheel a2, wherein the clutch 43 is in a disengaged state when the synchronizing wheel a2 idles against the mold moving mechanism 41; when the synchronizing wheel a2 moves synchronously with the mold transfer mechanism 41, the clutch 43 is in an engaged state. In this way, through the setting of clutch for the shifting die can go on with the mode locking in step, need not pause, and share a power supply. Meanwhile, the mold moving and mold locking are quickly connected, so that the process is simple and quick, the positioning precision and the mold opening and closing repetition precision of the mold can be effectively improved, and in addition, the idle cycle period (dry cycle) of the injection molding machine is also shortened.

Specifically, each driving wheel a1 is connected to a corresponding clamping nut 401 and is positioned on the movable platen 3 through a connecting sleeve t, so that the driving wheel a1 and the clamping nut 401 are equivalent to the rotation of the connecting sleeve t, and the screwing and the separation can be performed.

In this example, the driving wheel a1 and the synchronizing wheel a2 are both gears, and the displacement amount of the movable die plate can be kept uniform by a rack belt (of course, other mechanical links may be used as the driving mechanism) of the timing belt a 3.

Of course, in consideration of the tightness of the timing belt a3, the movable die plate 3 may be provided with the tension guide wheel a4, so that the synchronous transmission of the plurality of transmission wheels is more stably realized.

Meanwhile, the tooth numbers and the diameters of the transmission wheel a1 and the synchronizing wheel a2 are the same. The assembly is convenient, and the control of the consistent displacement is convenient.

In this example, the mold moving mechanism 41 includes a fixed seat 410 disposed on the machine base 1, a screw 411 matched with the fixed seat 410 and disposed parallel to the mold locking tie rod 400, and a mold moving power device 412 for driving the screw 411 to rotate around its own axis and positioned on the movable mold plate 3. The transmission mode of the screw rod is adopted to further improve the stability and the accuracy of the mold moving and the mold locking, and it should be noted that, in this example, the forward displacement of the mold locking nut is as large as the forward displacement of the movable mold plate, that is to say: 1. the thread pitch of the mode locking nut is the same as the lead of the screw rod; 2. the driving wheel and the synchronous wheel have the same tooth number, but the two points can be different as long as the displacement is consistent.

The mold moving power device 412 comprises a driving motor b1 with the axis line parallel to the lead screw 411, a coupler b2 used for connecting the output shaft of the driving motor b1 with the end part of the lead screw 411 far away from the fixed seat 410, and a clutch 43 arranged on the coupler b 2.

In this embodiment, the screw 411 is a ball screw and is correspondingly disposed right below the mold locking high-pressure cylinder 421, a through hole 2a for the ball screw to pass through is correspondingly disposed on the fixed mold plate 2, and a relief hole for the ball screw to pass through is correspondingly formed on the mold mounting plate 420.

Meanwhile, the four driving wheels a1 are correspondingly arranged at four opposite corners of the movable die plate 3, the synchronizing wheel a2 is positioned below the position between the two driving wheels a1 at the bottom, and the tensioning guide wheels a4 are positioned at two opposite sides of the synchronizing wheel a 2.

The clutch 43 is a dog clutch, which is commercially available directly and the principle of which is not described here, but which is clearly practicable.

Therefore, the above implementation process is divided into a mold closing process and a mold opening process.

Specifically, the mold closing process is as follows:

the method comprises the following steps: the servo motor (i.e. the driving motor b 1) drives the ball screw to rotate through the coupling b2, so as to drive the whole movable module 3 to move towards the fixed module 2 along the linear rail (i.e. the i-shaped slide rail 1 a) (at this time, the jaw clutch 43 is in a power-off state, i.e. a separation state);

step two: until the mold is closed, the mold locking pull rod 400 and the mold locking nut 401 can be screwed, the jaw clutch 43 is engaged, the servo motor drives the moving module 3 to move forward, and meanwhile, the four mold locking nuts rotate 90 degrees through the transmission of the synchronous belt a3, and the mold locking nut 401 is screwed to wrap the mold locking pull rod 400 to complete mold locking;

step three: the mold locking high-pressure cylinder 421 works to push the mold mounting plate 420 to establish a mold locking force, thereby completing a mold closing action.

The specific mold opening process is as follows:

the method comprises the following steps: after the glue injection action is finished, the mold locking high-pressure oil cylinder 421 drives the mold mounting plate 420 to retreat, and high pressure is discharged;

step two: the jaw clutch 43 is engaged, the servo motor rotates reversely, the four mode locking nuts 401 rotate 90 degrees reversely through the transmission of the synchronous belt a3, the mode locking nuts 401 and the mode locking pull rods 400 are unscrewed, and the clutch 43 is separated after the completion;

step three: the servo motor rotates reversely to drive the ball screw to rotate reversely, so that the whole movable template 3 is driven to move reversely to the fixed template 2 along the linear rail, and the die opening action is completed after the movable template reaches the position.

Example 2

As shown in fig. 6 to 8, the two-plate injection molding machine with electric mold opening and closing according to the present embodiment includes a machine base 1, a fixed mold plate 2, a movable mold plate 3, and a mold opening and closing device 4.

Specifically, the base 1, the fixed die plate 2, the movable die plate 3, and the die opening and closing device 4 are similar to those of embodiment 1, except for the die moving mechanism 41.

Referring to fig. 9 to 10, the mold moving mechanism 41 includes fixing bases 410 disposed on two opposite sides of the fixed mold plate 2 and distributed in an up-down diagonal manner, a screw rod 411 engaged with the fixing bases 410 and disposed parallel to the mold locking tie rod 400, and a mold moving power device 412 for driving the screw rod 411 to rotate around its own axis and positioned on the movable mold plate 3.

The mold moving power device 412 comprises a driving motor b1 with the axis line parallel to the lead screw 411, a transmission component b3 used for connecting the output shaft of the driving motor b1 with the end part of the lead screw 411 far away from the fixed seat, and a clutch 43 arranged on the output shaft.

The transmission member b3 includes an output wheel b30 provided on the output shaft; a transmission wheel b31 arranged at the end of the screw rod 411 far away from the fixed seat 410; tension pulleys b 32; and a conveyor belt b33 (of course, other mechanical linkages may be used as the transmission mechanism) for driving and connecting the output wheel b30, the conveyor wheel b31 and the tension wheel b 32.

Specifically, the output wheel b30, the transmission wheel b31 and the tension wheel b32 are also gears, the transmission belt b33 is also a rack belt, wherein the output wheel b30 and the synchronizing wheel a2 are coaxially arranged, and the output wheel b30 is positioned outside the synchronizing wheel a2, so that the synchronizing wheel a3 is positioned between the transmission belt b33 and the movable die plate 3.

In this example, the belt b33 has a trapezoidal shape.

Meanwhile, since the driving motor b1 is located below the left side of the movable die plate 3, the running direction of the timing belt a3 is also different, but the synchronism of the movement is not affected.

As for the embodiment, as in the embodiment, there is a slight difference that in the mold transfer process, two ball screws are driven by the conveyor belt b33, and the moving of the movable mold plate 3 is driven by the movement of the ball screws.

Example 3

As shown in fig. 11, the two-plate injection molding machine with electric mold opening and closing according to the present embodiment includes a machine base 1, a fixed mold plate 2, a movable mold plate 3, and a mold opening and closing device 4.

Specifically, the base 1, the fixed platen 2, the movable platen 3, and the mold opening and closing device 4 are similar to those of embodiment 1, except for the mold clamping mechanism 42.

Referring to fig. 12, the movable mold plate 3 is in an X shape, and four mold locking tie rods 400 are correspondingly disposed at the ends of the X shape.

As shown in fig. 13, in this embodiment, the power take-off member 420 includes a mold mounting plate c1 provided on the movable platen 3, and a mold connecting sleeve c2 having both ends connected between the mold mounting plate c1 and the movable platen 3, respectively, wherein the mold connecting sleeve c2 is hollow and annular, and a plurality of slide grooves c20 extending in the longitudinal direction of the mold clamping tie bar 400 are formed in the mold connecting sleeve c 2.

The mold closing power device 421 includes a slide d1 which is respectively matched with each slide groove c20 and is arranged on the mold connecting sleeve c2 in a sliding way along the length direction of the slide groove c20, an ejector pin rod d2 which is arranged on the slide d1 and can penetrate through the mold mounting plate c1, and a power cylinder d3 which is used for driving the slide d1 to move between the mold mounting plate c1 and the movable mold plate 3, wherein the ejector pin rod d2 abuts against or releases the mold from the end penetrating through the mold mounting plate c1 along with the movement of the power cylinder d 3.

Further, the mold connecting sleeve c2 is circular, and there are four sliding grooves c20, which extend along the length direction of the mold connecting sleeve c2 and are uniformly distributed around the circumference of the circular shape, so that an arc-shaped portion c21 is formed between every two adjacent sliding grooves c20, and four arc-shaped portions c21 are formed at the end of the mold connecting sleeve c2 connected to the mold mounting plate c 1.

In this example, in order to implement the implementation of the ejector pin opening and closing mold, a through hole matched with the arc-shaped part c21 is correspondingly arranged on the sliding seat d1, and 5 ejector pin rods d2 are correspondingly arranged at the middle part of the sliding seat d1, and the central line of the ejector pin rod d2 is superposed with the central line of the circular ring; the remaining four are distributed in an annular array around the center of slide d 1.

Meanwhile, in order to facilitate the arrangement of the power cylinder d3, connecting lugs d4 are formed on two opposite sides of the sliding seat d1, the power cylinder d3 is a hydraulic cylinder, wherein the telescopic end of each hydraulic cylinder penetrates through the connecting lug d4 and is fixedly connected with the corresponding side mold mounting plate c1, when the two hydraulic cylinders are synchronously telescopic, the sliding seat d1 is driven to slide back and forth along the length direction of the sliding groove c20, and then 5 ejector pins are abutted against or separated from the mold.

Then, just should be the setting of "X" type movable mould board 3, so, two pneumatic cylinders just correspond the distribution in the breach of the left and right sides of "X" type movable mould board 3 for the structure distributes compactly, and is relatively pleasing to the eye.

The mold closing principle is completely the same as that of the embodiment, but the difference is that the final mold closing action mainly depends on the collision or separation of the ejector pins, so that the corresponding mold opening and closing process is completed.

Therefore, the two-plate injection molding machine adopting the embodiment has the following advantages:

1. acting force is applied to the mold through mold closing force and mold locking pulling force provided by the plurality of mold locking pull rods, so that the mold is closed under relatively uniform stress, and the mold closing precision is improved;

2. the servo motor, the ball screw and the jaw clutch are used, so that the production period of the traditional mold opening and closing is optimized, the mold moving speed is ensured, and the mold closing precision can be improved;

3. the screwing precision of the mold locking nut and the mold locking pull rod can be ensured;

4. the mold moving and the mold locking can be carried out synchronously without pause, the process is simple and rapid, the positioning precision and the mold opening and closing repeated precision of the mold can be effectively improved, in addition, the mold locking pull rod does not need to have resetting action, the mold opening and closing of the mold can be implemented, the action is coherent, and the idle cycle period (dry cycle) of the injection molding machine is also shortened.

The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A two-plate injection molding machine with electric mold opening and closing function comprises:

a machine base;

the fixed template is fixed at one end part of the machine base;

a movable die plate which is provided on the base so as to be capable of sliding in the opposite direction with respect to the fixed die plate;

the mold opening and closing device comprises a mold locking mechanism, a mold moving mechanism and a mold closing mechanism,

the method is characterized in that:

the mold locking mechanism comprises a plurality of mold locking pull rods which are fixed on the fixed mold plate and extend along the moving direction of the movable mold plate, mold locking nuts which are arranged on the movable mold plate and can be matched with the mold locking pull rods in a one-to-one correspondence manner, and a mold locking power device which is used for driving the mold locking nuts to move synchronously and is relatively locked with or separated from the corresponding mold locking pull rods;

the mold moving mechanism is in transmission connection with the mold locking power device through a clutch, when a mold is moved, the clutch is in a separation state, and the mold locking pull rod can be movably inserted into the mold locking nut; when the mold is locked, the clutch is in a joint state, the mold locking power device and the mold moving mechanism move synchronously, and the mold locking pull rod rotates and is locked relative to the mold locking nut;

the mould closing mechanism is positioned on the movable mould plate and between the movable mould plate and the fixed mould plate, and comprises a power output part and a mould closing power device, wherein the direction of a mould closing force provided by the mould closing power device is the same as the direction of a pulling force provided by the movable mould plate and is arranged in a plurality of areas surrounded by the mould closing pull rods in parallel.

2. The electric die opening and closing two-plate injection molding machine according to claim 1, characterized in that: the mold locking power device comprises a driving wheel coaxially connected with each mold locking nut, a synchronizing wheel connected with the clutch and a synchronous transmission part for driving and connecting the driving wheels and the synchronizing wheel, wherein when the synchronizing wheel idles relative to the mold moving mechanism, the clutch is in a separation state; when the synchronizing wheel and the mold moving mechanism move synchronously, the clutch is in an engaged state.

3. The electric die opening and closing two-plate injection molding machine according to claim 2, characterized in that: each driving wheel is connected with the corresponding mold locking nut and is positioned on the movable mold plate through a connecting sleeve; the synchronous transmission part is a synchronous belt, a connecting rod transmission part or a gear transmission part.

4. The electric die opening and closing two-plate injection molding machine according to claim 1, characterized in that: a partition type internal thread meshing section is formed on the inner wall of each mode locking nut, and a partition type external thread meshing section is formed on the corresponding mode locking pull rod, wherein when the mode locking nut is locked with the mode locking pull rod, the internal thread meshing section and the external thread meshing section are meshed relatively; and when the mode locking nut and the mode locking pull rod are unlocked, the internal thread meshing section and the external thread meshing section are staggered relatively.

5. The electric die opening and closing two-plate injection molding machine according to claim 4, characterized in that: the internal thread occlusion section is provided with two sections which are correspondingly arranged on two opposite sides of the inner wall of the mold locking nut; the external thread meshing section is correspondingly arranged on two opposite sides of the mode locking pull rod, and after the mode locking nut rotates forwards or reversely for 90 degrees, the internal thread meshing section and the external thread meshing section are switched between a relative staggered state and a relative meshing state.

6. The electric die opening and closing two-plate injection molding machine according to claim 1, characterized in that: the power output part is a mould mounting plate arranged on the movable mould plate, the mould closing power device is a mould locking high-pressure oil cylinder with two end parts respectively connected between the mould mounting plate and the movable mould plate, wherein the center of the mould locking high-pressure oil cylinder is coincided with the center of an area surrounded by a plurality of mould locking pull rods.

7. The electric die opening and closing two-plate injection molding machine according to claim 1, characterized in that: be formed with mould mounting panel, both ends on the movable mould board and connect respectively mould mounting panel with mould adapter sleeve between the movable mould board, wherein the inside cavity of mould adapter sleeve is cyclic annular, just be formed with a plurality of edges on the adapter sleeve the spout that mode locking pull rod length direction extends, compound die power ware includes respectively with every the spout cooperation and along spout length direction slides and sets up slide, setting on the mould adapter sleeve are in just can wear out on the slide the thimble bar of mould mounting panel and be used for the drive the slide is in the mould mounting panel with the power cylinder of motion between the movable mould board, the thimble bar is along with the motion of power cylinder is worn out certainly the tip of mould mounting panel supports tightly or loosens the mould.

8. An electric die opening and closing two-plate injection molding machine according to any one of claims 1 to 7, characterized in that: the mould moving mechanism comprises a fixed seat arranged on the fixed mould plate or the base, a screw rod matched with the fixed seat and arranged in parallel with the mould locking pull rod, and a mould moving power device used for driving the screw rod to rotate around the self axial direction and be positioned on the movable mould plate.

9. The electric die opening and closing two-plate injection molding machine according to claim 8, characterized in that: the lead screw is a ball screw, the mold moving power device comprises a driving motor and a coupler, the shaft axis of the driving motor is overlapped with that of the ball screw, the coupler is used for connecting an output shaft of the driving motor with the end part, far away from the fixed seat, of the ball screw, and the clutch is arranged on the coupler or the output shaft.

10. The electric die opening and closing two-plate injection molding machine according to claim 8, characterized in that: the two ball screws are correspondingly arranged on two opposite sides of the fixed template and are distributed diagonally up and down; the mould moving power device comprises a driving motor, a transmission part and a synchronous connecting piece, wherein the driving motor is arranged with the axis line parallel to the ball screw, the transmission part is used for connecting the output shaft of the driving motor with the end part of the ball screw, which is far away from the fixed seat, the clutch is arranged on the output shaft, the transmission part comprises an output wheel arranged on the output shaft, a transmission wheel arranged on the end part of the screw, which is far away from the fixed seat, and the synchronous connecting piece is used for connecting the output wheel and the transmission wheel in the same step, and the synchronous connecting piece is a transmission belt, a connecting rod transmission piece or a gear transmission piece.

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