Injection molding machine and injection molding machine auxiliary mold opening method

Abstract

The application discloses an injection molding machine, which comprises a fixed mold assembly, a movable mold assembly oppositely arranged at the back side of the fixed mold assembly, a back seat plate oppositely arranged at the back side of the movable mold assembly, a driving mechanism mounted on the back seat plate, a mold opening and closing mechanism with one end connected to the power output end of the driving mechanism and the other end connected to the movable mold assembly, wherein the driving mechanism is capable of driving the mold opening and closing mechanism to move, and further driving the movable mold assembly to move to an open mold position or a closed mold position, and an auxiliary mold opening mechanism with a power output part, wherein when the movable mold assembly is located at the closed mold position, the auxiliary mold opening mechanism is capable of driving the mold opening and closing mechanism to move, and further driving the movable mold assembly to move to the open mold position, and the auxiliary mold opening mechanism is capable of driving the mold opening and closing mechanism to move backward, and further driving the movable mold assembly to move backward to the open mold position, so as to prevent the situation that the driving mechanism cannot drive the mold opening and closing mechanism to move backward, and the mold cannot be opened.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, in particular to an injection molding machine and an auxiliary mold opening method for the injection molding machine. Background Art

[0002] When using an injection molding machine for injection molding, the mold often becomes locked and cannot be opened. The injection molding machine cannot be repaired in a short time, and due to the urgent production task, the mold must be removed to change the machine to continue production. In this way, the mold can only be opened by disassembling the machine twist and pin of the injection molding machine. This will not only damage the injection molding machine, but also the workload of disassembling and assembling the machine twist and pin is large, and the disassembly and assembly efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide an injection molding machine with multiple mold opening modes and a mold opening method using the same, so as to realize opening the mold by using an auxiliary mold opening mechanism when a driving mechanism cannot open the mold.

[0004] In order to achieve the above-mentioned objectives, the present invention provides, in a first aspect, an injection molding machine, comprising: a fixed mold assembly; a movable mold assembly, which is relatively arranged on the rear side of the fixed mold assembly; a rear seat plate, which is relatively arranged on the rear side of the movable mold assembly; a driving mechanism, which is installed on the rear seat plate; a mold opening and closing mechanism, one end of which is connected to the power output end of the driving mechanism, and the other end of the mold opening and closing mechanism is connected to the movable mold assembly, and the operation of the driving mechanism can drive the mold opening and closing mechanism to move, and then drive the movable mold assembly to move to the mold opening position or the mold closing position; an auxiliary mold opening mechanism, which has a power output part, and when the movable mold assembly is located in the mold closing position, the auxiliary mold opening mechanism can drive the mold opening and closing mechanism to move, and drive the movable mold assembly to move to the mold opening position.

[0005] Preferably, the auxiliary mold opening mechanism includes a jack, and the jack includes a main body and a telescopic rod. The front end of the telescopic rod is against the movable mold assembly, and the rear end of the telescopic rod is defined as the power output part and is connected to the mold opening and closing mechanism.

[0006] Preferably, the auxiliary mold opening mechanism further comprises a support seat, the support seat is fixedly connected to the rear seat plate, a guide groove is provided on the support seat, and the telescopic rod is movably arranged in the guide groove.

[0007] Preferably, the support seat can adjust the height of the guide groove along its height direction.

[0008] Preferably, the auxiliary mold opening mechanism further includes a rear push rod, and the front end of the telescopic rod is abutted against the movable mold assembly through the rear push rod.

[0009] Preferably, the driving mechanism is a pneumatic cylinder or an oil cylinder, the driving mechanism has a piston rod capable of reciprocating in the front-back direction; the mold opening and closing mechanism comprises a locking cross and a connecting rod mechanism, the locking cross is connected with the piston rod, the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is rotatably connected with the locking cross, the other end is rotatably connected with the middle part of the second connecting rod, the rear end of the second connecting rod is rotatably connected with the rear seat plate, and the front end is rotatably connected with the rear end of the third connecting rod, and the front end of the third connecting rod is rotatably connected with the movable mold assembly.

[0010] Preferably, the mold opening and closing mechanism comprises two connecting rod mechanisms, and the two connecting rod mechanisms are symmetrical about the locking cross.

[0011] Preferably, a limiting block is arranged on the rear seat plate, and the limiting block is used to limit the moving stroke of the locking cross moving forward.

[0012] Preferably, a controller is further included, the controller is electrically connected with the driving mechanism and the auxiliary mold opening mechanism, and the controller is used to control the auxiliary mold opening mechanism to operate when the driving mechanism is sent an opening instruction and the movable mold assembly does not change position.

[0013] The application further provides an injection molding machine auxiliary mold opening method based on the injection molding machine.

[0014] When the controller sends an opening instruction to the driving mechanism and detects that the movable mold assembly does not change position, the controller controls the auxiliary mold opening mechanism to operate, the auxiliary mold opening mechanism drives the mold opening and closing mechanism to move backward, and then drives the movable mold assembly to move backward to the opening position.

[0015] Compared with the prior art, the injection molding machine and the injection molding machine auxiliary mold opening method have the following beneficial effects:

[0016] In the injection molding machine, the driving mechanism can drive the mold opening and closing mechanism to move forward and backward, drive the movable mold assembly to move backward to the opening position, and make the movable mold assembly and the fixed mold assembly far away from each other, so that the mold is opened, or drive the movable mold assembly to move forward to the closing position, and make the movable mold assembly and the fixed mold assembly abut each other, so that the mold is closed, and the injection work is carried out; when the movable mold assembly is located at the closing position, the auxiliary mold opening mechanism can drive the mold opening and closing mechanism to move backward, drive the movable mold assembly to move backward to the opening position, so as to prevent the situation that the driving mechanism cannot drive the mold opening and closing mechanism to move backward, and the mold cannot be opened, thereby further ensuring the smooth progress of the injection work.

[0017] This injection molding machine auxiliary mold opening method provides a variety of mold opening methods. The driving mechanism and the auxiliary mold opening mechanism can both drive the movable mold assembly to move to the mold opening position. When the driving mechanism cannot drive the movable mold assembly to open the mold, the auxiliary mold opening mechanism will operate to open the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a schematic structural diagram of an injection molding machine according to an embodiment of the present invention;

[0019] Figure 2 is an exploded view of an injection molding machine according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of area A in the middle;

[0021] Figure 4 This is a simplified structural diagram of a connecting rod mechanism of an injection molding machine according to an embodiment of the present invention;

[0022] In the figure, 1. fixed mold assembly; 2. movable mold assembly; 3. rear seat plate; 4. driving mechanism; 41. piston rod; 5. mold opening and closing mechanism; 51. clamping cross; 52. connecting rod mechanism; 521. first connecting rod; 522. second connecting rod; 523. third connecting rod; 6. auxiliary mold opening mechanism; 61. power output part; 62. jack; 621. main body; 622. telescopic rod; 63. support seat; 631. guide groove; 64. rear push rod; 7. limit block. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0024] In describing the present invention, it should be understood that the terms "first," "second," etc., are used to describe various types of information, but such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, "first" information could also be referred to as "second" information, and similarly, "second" information could also be referred to as "first" information without departing from the scope of the present invention.

[0025] like Figures 1-4As shown, an injection molding machine according to a preferred embodiment of the present invention includes: a fixed mold assembly 1; a movable mold assembly 2, which is relatively arranged on the rear side of the fixed mold assembly 1; a rear seat plate 3, which is relatively arranged on the rear side of the movable mold assembly 2; a driving mechanism 4, which is installed on the rear seat plate 3; a mold opening and closing mechanism 5, one end of which is connected to the power output end of the driving mechanism 4, and the other end of the mold opening and closing mechanism 5 is connected to the movable mold assembly 2, and the operation of the driving mechanism 4 can drive the mold opening and closing mechanism 5 to move, and then drive the movable mold assembly 4 to move to the mold opening position or the mold closing position; an auxiliary mold opening mechanism 6, which has a power output part 61, and when the movable mold assembly 2 is in the mold closing position, the auxiliary mold opening mechanism 6 can drive the mold opening and closing mechanism 5 to move, and drive the movable mold assembly 2 to move to the mold opening position.

[0026] Based on the above technical solution, the driving mechanism 4 can drive the mold opening and closing mechanism 5 to move forward and backward, driving the movable mold assembly 2 to move backward to the mold opening position, so that the movable mold assembly 2 and the fixed mold assembly 1 are separated, thereby realizing mold opening, or driving the movable mold assembly 2 to move forward to the mold closing position, so that the movable mold assembly 2 and the fixed mold assembly 1 are abutted, thereby realizing mold closing to carry out injection molding; and when the movable mold assembly 2 is in the mold closing position, the auxiliary mold opening mechanism 6 can drive the mold opening and closing mechanism 5 to move backward, driving the movable mold assembly 2 to move backward to the mold opening position, so as to prevent the driving mechanism 4 from being unable to drive the mold opening and closing mechanism 5 to move backward and the mold from being unable to open, thereby further ensuring the smooth progress of the injection molding work.

[0027] In this embodiment, the load of the driving mechanism 4 driving the movable mold assembly 2 to move backward is less than or equal to 160kg. However, when the clamping force between the fixed mold assembly 1 and the movable mold assembly 2 is greater than 1600N (theoretically, 1kg is about 10N), the driving mechanism 4 cannot drive the movable mold assembly 2 to move backward, that is, the mold cannot be opened. At this time, the auxiliary mold opening mechanism 6 is required; preferably, in this embodiment, the auxiliary mold opening mechanism 6 includes a jack 62, and the jack 62 includes a main body 621 and a telescopic rod 622. The front end of the telescopic rod 622 is against the movable mold assembly 2, and the rear end of the telescopic rod 622 is It is defined as a power output part 61 and is connected to the mold opening and closing mechanism 5. The main body 621 can be controlled manually or electrically to drive the telescopic rod 622 to extend. The two ends of the telescopic rod 622 will press the movable mold assembly 2 and the mold opening and closing mechanism 5 in the forward and backward directions respectively. However, since the movable mold assembly 2 is locked with the fixed mold assembly 1, the movable mold assembly 2 cannot move forward, so that the telescopic rod 622 can only push the mold opening and closing mechanism 5 to move backward, so that the mold opening and closing mechanism 5 drives the movable mold assembly 2 to move backward and away from the fixed mold assembly 1, thereby realizing mold opening.

[0028] Specifically, the auxiliary mold opening mechanism 6 also includes a support seat 63, which is fixedly connected to the rear seat plate 3. A guide groove 631 is provided on the support seat 63, and the telescopic rod 622 is movably arranged in the guide groove 631. The guide groove 631 is used to provide support for the telescopic rod 622, and the support seat 63 can adjust the height of the guide groove 631 along its height direction, thereby adjusting the height of the telescopic rod 622, so as to find a better thrust point and achieve better pushing and opening of the mold closing mechanism 5.

[0029] Furthermore, the auxiliary mold opening mechanism 6 further includes a rear push rod 64 , and the front end of the telescopic rod 622 abuts against the movable mold assembly 2 through the rear push rod 64 .

[0030] Specifically, the driving mechanism 4 is an air cylinder or an oil cylinder, and the driving mechanism 4 has a piston rod 41 that can reciprocate in the front and rear directions; the mold opening and closing mechanism 5 includes a locking cross 51 and a connecting rod mechanism 52, and the locking cross 51 is connected to the piston rod 41, and the piston rod 41 can drive the locking cross 51 to move in the front and rear directions. The connecting rod mechanism 52 includes a first connecting rod 521, a second connecting rod 522 and a third connecting rod 523. One end of the first connecting rod 521 is connected to the mold locking cross 51 for rotation, and the other end is connected to the middle part of the second connecting rod 522 for rotation. The rear end of the second connecting rod 522 is connected to the rear seat plate 3 for rotation, and the front end is connected to the rear end of the third connecting rod 523 for rotation. The front end of the third connecting rod 523 is connected to the movable mold assembly 2 for rotation. The mold locking cross 51 is pushed to drive the movable mold assembly 2 to move, so as to realize the process of opening or closing the mold: when the mold locking cross 51 is pushed to move forward, the mold locking cross 51 will push the first connecting rod 521 and push the second connecting rod 522. The second connecting rod 522 will rotate relative to the rear seat plate 3 and push the third connecting rod 523. Similarly, the third connecting rod 523 will rotate relative to the movable mold assembly 2. The mold assembly 2 is rotated and pushed to move forward, and the angle between the second link 522 and the third link 523 will gradually increase to 180°, thereby pushing the movable mold assembly 2 to the mold closing position and abutting against the fixed mold assembly 1 to achieve mold closing; when the locking cross 51 is pulled to move backward, the locking cross 51 will pull the first link 521 and cause it to pull the second link 522, the second link 522 will rotate relative to the rear seat plate 3 and pull the third link 523, the third link 523 will rotate relative to the movable mold assembly 2 and pull the movable mold assembly 2 to move backward, at this time, the angle between the second link 522 and the third link 523 will gradually decrease from the original 180° until the movable mold assembly 2 moves to the mold opening position and moves away from the fixed mold assembly 1, thereby achieving mold opening.

[0031] Specifically, the mold opening and closing mechanism 5 includes two linkage mechanisms 52, which are symmetrical about the mold clamping crosshead 51. When the mold clamping crosshead 51 moves forward and backward, it pulls the two linkage mechanisms 52 to move synchronously, so that the two linkage mechanisms 52 synchronously push the movable mold assembly 2 to move forward, to ensure that the movable mold assembly 2 can translate relative to the fixed mold assembly 1 to approach, to ensure that the movable mold assembly 2 and the fixed mold assembly 1 can be smoothly clamped, or synchronously pull the movable mold assembly 2 to move backward, to ensure that the movable mold assembly 2 can translate relative to the fixed mold assembly 1 to retreat, to prepare for the next clamping.

[0032] In this embodiment, the rear seat plate 3 is provided with a limiting block 7, which is used to limit the movement stroke of the mold clamping crosshead 51 moving forward, to prevent the mold clamping crosshead 51 from moving beyond the stroke, which may cause damage to the linkage mechanism 52.

[0033] The embodiment also includes a controller (not shown in the figure), which is electrically connected with the driving mechanism 4 and the auxiliary mold opening mechanism 6. The controller is used to control the auxiliary mold opening mechanism 6 to operate when the driving mechanism 4 cannot control the mold opening because the movable mold assembly 2 does not change its position when the controller sends a mold opening instruction to the driving mechanism 4, to pull the movable mold assembly 2 to move backward to achieve mold opening.

[0034] The embodiment also proposes an auxiliary mold opening method of the injection molding machine in the second aspect, which includes the following steps:

[0035] When the controller sends a mold opening instruction to the driving mechanism 4 and detects that the movable mold assembly 2 does not change its position, the controller controls the auxiliary mold opening mechanism 6 to operate, which drives the mold opening and closing mechanism 5 to move backward, and then drives the movable mold assembly 2 to move backward to the mold opening position. The auxiliary mold opening method of the injection molding machine provides a way for the auxiliary mold opening mechanism 6 to assist in mold opening, which can pull the movable mold assembly 2 to open the mold when the driving mechanism 4 cannot control the mold opening.

[0036] The working process of the injection molding machine is as follows:

[0037] The controller controls the driving mechanism 4 to operate, so that the driving mechanism 4 drives the piston rod 41 to move forward and backward, drives the mold clamping crosshead 51 to move forward and backward, and then drives the linkage mechanism 52 to move forward and backward, to push the movable mold assembly 2 and move it forward to the clamping position, to achieve clamping, or pull the movable mold assembly 2 to move backward to the mold opening position, to achieve mold opening. When the movable mold assembly 2 is at the clamping position, the controller sends a mold opening instruction to the driving mechanism 4, and the movable mold assembly 2 does not change its position. At this time, the controller controls the auxiliary mold opening mechanism 6 to operate. The process is as follows: the main body part 621 of the jack 62 drives the telescopic rod 622 to elongate, pushes the mold clamping crosshead 51 to move backward, pulls the linkage mechanism 52 to move, and then pulls the movable mold assembly 2 to move backward until it reaches the mold opening position, to achieve mold opening.

[0038] The above merely describes the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. An injection molding machine, characterized in that: include: Fixed mold assembly; A movable mold assembly, which is arranged at the rear side of the fixed mold assembly; a rear seat plate, which is relatively arranged on the rear side of the movable mold assembly; A driving mechanism, which is mounted on the rear seat plate, wherein the driving mechanism is an air cylinder or an oil cylinder, and has a piston rod capable of reciprocating in a front-to-rear direction; A mold opening and closing mechanism, one end of which is connected to the power output end of the driving mechanism, and the other end of which is connected to the movable mold assembly. The operation of the driving mechanism can drive the mold opening and closing mechanism to move, and further drive the movable mold assembly to move to the mold opening position or the mold closing position; An auxiliary mold opening mechanism, the auxiliary mold opening mechanism including a jack, the jack including a main body and a telescopic rod, the front end of the telescopic rod abuts against the movable mold assembly, the rear end of the telescopic rod is defined as a power output portion and is connected to the mold opening and closing mechanism; The mold opening and closing mechanism includes a mold locking cross and a connecting rod mechanism, the mold locking cross is connected to the piston rod, and the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is rotatably connected to the mold locking cross, and the other end is rotatably connected to the middle part of the second connecting rod, the rear end of the second connecting rod is rotatably connected to the rear seat plate, and the front end is rotatably connected to the rear end of the third connecting rod, and the front end of the third connecting rod is rotatably connected to the movable mold assembly; When the movable mold assembly is located at the mold closing position and the clamping force between the fixed mold assembly and the movable mold assembly is greater than 1600N, causing the driving mechanism to be unable to drive the movable mold assembly to move backward, the telescopic rod of the jack can drive the mold opening and closing mechanism to move, and the main body of the jack drives the telescopic rod to extend, pushing the clamping cross to move backward, and driving the movable mold assembly to move to the mold opening position.

2. The injection molding machine according to claim 1, characterized in that The auxiliary mold opening mechanism also includes a support seat, which is fixedly connected to the rear seat plate. A guide groove is provided on the support seat, and the telescopic rod is movably arranged in the guide groove.

3. The injection molding machine according to claim 2, characterized in that The support base can adjust the height of the guide groove along its height direction.

4. The injection molding machine according to claim 1, characterized in that The auxiliary mold opening mechanism further includes a rear ejector rod, and the front end of the telescopic rod is abutted against the movable mold assembly through the rear ejector rod.

5. The injection molding machine according to claim 1, wherein The mold opening and closing mechanism includes two connecting rod mechanisms, and the two connecting rod mechanisms are symmetrical about the mold locking cross.

6. The injection molding machine according to claim 1, characterized in that A limit block is provided on the rear seat plate, and the limit block is used to limit the moving stroke of the clamping cross toward the front.

7. The injection molding machine according to any one of claims 1 to 6, characterized in that The invention also includes a controller, which is electrically connected to the driving mechanism and the auxiliary mold opening mechanism, and is used to: When a mold opening instruction is sent to the driving mechanism and the position of the movable mold assembly does not change, the auxiliary mold opening mechanism is controlled to operate.

8. An injection molding machine assisted mold opening method, based on the injection molding machine according to claim 7, characterized in that: The following steps are involved: When the controller sends a mold opening instruction to the driving mechanism and detects that the movable mold assembly does not change position, the controller controls the auxiliary mold opening mechanism to operate, and the auxiliary mold opening mechanism drives the mold opening and closing mechanism to move backward, thereby driving the movable mold assembly to move backward to the mold opening position.

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