Locking device of rubber plastic extruder and extruder

Abstract

The utility model provides a rubber plastic extruder locking device and an extruder. The rubber plastic extruder locking device comprises: a frame assembly; an upper die; the upper die and the lower die are movably arranged on the rack assembly, and locking grooves are formed in the two sides of the upper die and the two sides of the lower die correspondingly; the number of the locking pull rod assemblies is at least two, the two sides of the upper die and the two sides of the lower die are each provided with at least one locking pull rod assembly, and at least one part of each locking pull rod assembly can enter or retreat from the corresponding locking groove. A first driving assembly; the first driving assembly and the second driving assembly are respectively in driving connection with the locking pull rod assembly; at least one part of the first driving assembly can drive the locking pull rod assembly to enter or exit from the locking groove; the second driving assembly drives the locking pull rod assembly to move between the locking position and the unlocking position relative to the upper die and the lower die. The extruder locking mechanism solves the problem that an extruder locking mechanism in the prior art is poor in use performance.

Description

Technical Field

[0001] The utility model relates to the field of rubber and plastic extrusion equipment, and particularly to a locking device and an extruder for rubber and plastic extruders. Background Art

[0002] At present, the locking of the extrusion heads of rubber components such as rubber sheets, tire treads, tire sides, and triangular rubbers is mostly a C-type lock door structure. Its disadvantages are that the force-applying parts of the C-type door lock are the upper and lower hooks on the side. When applying force to the upper and lower dies, the upper and lower hooks of the C-type door are subjected to shear stress, and the door body is subjected to bending stress. In order to improve the stress strength, the volume of the C-type door needs to be enlarged, so the cost is relatively high. At the same time, it also has the disadvantages of large occupied space and inconvenient operation and maintenance.

[0003] Therefore, there is a problem of poor performance of the locking mechanism of the extruder in the prior art. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a locking device and an extruder for rubber and plastic extruders to solve the problem of poor performance of the locking mechanism of the extruder in the prior art.

[0005] To achieve the above purpose, according to one aspect of the utility model, a locking device for a rubber and plastic extruder is provided, including: a frame assembly; an upper die; a lower die, both the upper die and the lower die are movably arranged on the frame assembly, and locking grooves are respectively arranged on both sides of the upper die and both sides of the lower die; a locking tie rod assembly, the locking tie rod assembly is at least two, at least one locking tie rod assembly is respectively arranged on both sides of the upper die and the lower die, and at least a part of the locking tie rod assembly can enter or exit the locking groove; a first driving assembly; a second driving assembly, the first driving assembly and the second driving assembly are respectively drivingly connected with the locking tie rod assembly; at least a part of the first driving assembly can drive the locking tie rod assembly to enter or exit the locking groove; when the first driving assembly drives the locking tie rod assembly to enter the locking groove, the second driving assembly drives the locking tie rod assembly to move between a locking position and an unlocking position relative to the upper die and the lower die.

[0006] Further, there are an open state and a closed state between the upper die and the lower die. When the upper die and the lower die move from the closed state to the open state, the upper die and the lower die move in a direction away from each other. When the locking tie rod assembly is in the locking position, the upper die and the lower die are in the closed state.

[0007] Further, the locking tie rod assembly includes: a connecting rod, the first driving assembly and the second driving assembly are arranged close to the same end of the connecting rod and are respectively drivingly connected with the connecting rod; a locking rod, the locking rod is arranged at the end of the connecting rod away from the first driving assembly and the second driving assembly; when the locking tie rod assembly is in the locking position, the locking rod abuts against the outer surface of the upper die or the outer surface of the lower die.

[0008] Further, the axial directions of the connecting rod and the locking rod are perpendicular to each other.

[0009] Further, the locking device of the rubber and plastic extruder further includes at least two eccentric shafts. The second driving assembly drives different locking pull rod assemblies to move between the locking position and the unlocking position through different eccentric shafts. The second driving assembly drives the eccentric shafts to rotate. The eccentric shafts have an eccentric structure, and the locking pull rod assemblies are sleeved on the eccentric structures.

[0010] Further, both the locking pull rod assemblies and the first driving assemblies are two. Different first driving assemblies are drivingly connected to different locking pull rod assemblies. The two locking pull rod assemblies are symmetrically arranged on both sides of the upper die and the lower die. The second driving assembly is one and is drivingly connected to the two locking pull rod assemblies.

[0011] Further, the second driving assembly includes: a driving cylinder. Both the first driving assembly and the driving cylinder are arranged on the side of the upper die away from the lower die or both the first driving assembly and the driving cylinder are arranged on the side of the lower die away from the upper die; two rocker arms. The driving cylinder is connected to different eccentric shafts through different rocker arms. The driving cylinder drives the two rocker arms to swing in a direction away from or close to each other, and the rocker arms swing with the end connected to the eccentric shaft as the center.

[0012] Further, both the locking pull rod assemblies, the first driving assemblies and the second driving assemblies are four and correspond one by one. Two locking pull rod assemblies are symmetrically arranged on both sides of the upper die, and two locking pull rod assemblies are symmetrically arranged on both sides of the lower die.

[0013] Further, the first driving assembly and the second driving assembly are respectively arranged on the frame assembly. The second driving assembly includes: a driving cylinder. The driving cylinder is arranged on the frame assembly; a rocker arm. The driving cylinder is connected to the eccentric shaft through the rocker arm, and the rocker arm swings with the end connected to the eccentric shaft as the center.

[0014] According to another aspect of the present invention, an extruder is provided, including the above-mentioned locking device of the rubber and plastic extruder.

[0015] Applying the technical solution of the present utility model, the locking device of the rubber and plastic extruder in this application includes a frame assembly, an upper die, a lower die, a locking tie rod assembly, a first driving assembly, and a second driving assembly. The upper die and the lower die are both movably arranged on the frame assembly, and locking grooves are respectively arranged on both sides of the upper die and both sides of the lower die; there are at least two locking tie rod assemblies, at least one locking tie rod assembly is respectively arranged on both sides of the upper die and both sides of the lower die, and at least a part of the locking tie rod assembly can enter or exit the locking groove; the first driving assembly and the second driving assembly are respectively drivingly connected to the locking tie rod assembly; at least a part of the first driving assembly can drive the locking tie rod assembly to enter or exit the locking groove; when the first driving assembly drives the locking tie rod assembly to enter the locking groove, the second driving assembly drives the locking tie rod assembly to move between a locking position and an unlocking position relative to the upper die and the lower die.

[0016] When using the locking device of the rubber and plastic extruder in this application, when it is necessary to lock the upper die and the lower die of the extruder to achieve the locking of the extrusion head, the locking tie rod assembly can be driven by the first driving assembly first, and after the locking tie rod assembly enters the locking groove, the locking tie rod assembly can continue to be driven by the second driving assembly, so that the locking frame plate can move from the unlocking position to the locking position, thereby realizing the locking of the upper die and the lower die. Since the locking tie rod assembly is used to replace the C-type door lock in the prior art in the locking device of the rubber and plastic extruder in this application, the locking device of the rubber and plastic extruder in this application occupies less space compared with the prior art. Therefore, the locking device of the rubber and plastic extruder in this application effectively solves the problem of poor performance of the locking mechanism of the extruder in the prior art. Description of the Drawings

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 The structural schematic diagram of the extruder showing a specific embodiment of this application is shown;

[0019] Figure 2 The structural schematic diagram of the locking device of the rubber and plastic extruder showing a specific embodiment of this application is shown;

[0020] Figure 3 Shows Figure 2 The structural schematic diagram when the locking tie rod assembly of the locking device of the rubber and plastic extruder in is in the unlocking position;

[0021] Figure 4 Shows Figure 2Schematic structural diagram of the locking pull rod assembly of the rubber and plastic extruder in the locked position;

[0022] Figure 5 Side view of the upper die of the locking device of the rubber and plastic extruder showing a specific embodiment of the present application;

[0023] Figure 6 Top view of the upper die of the locking device of the rubber and plastic extruder showing a specific embodiment of the present application;

[0024] Figure 7 Schematic structural diagram of the locking pull rod assembly of the locking device of the rubber and plastic extruder showing a specific embodiment of the present application;

[0025] Figure 8 Schematic diagram showing the positional relationship between the connecting rod and the locking rod of the locking pull rod assembly of the locking device of the rubber and plastic extruder showing a specific embodiment of the present application;

[0026] Figure 9 Schematic structural diagram of the eccentric shaft of the locking device of the rubber and plastic extruder showing a specific embodiment of the present application;

[0027] Figure 10 Schematic structural diagram of an extruder showing another specific embodiment of the present application;

[0028] Figure 11 Schematic diagram showing other transmission forms between the second drive assembly and the eccentric shaft in the present application.

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 10. Frame assembly; 11. Frame body; 12. Head main board seat; 20. Upper die; 30. Lower die; 40. Locking groove; 50. Locking pull rod assembly; 51. Connecting rod; 52. Locking rod; 60. First drive assembly; 70. Second drive assembly; 71. Drive cylinder; 72. Rocker arm; 80. Eccentric shaft; 81. Eccentric structure; 82. Rotary cylindrical part; 83. Drive cylindrical part; 90. Eccentric shaft seat; 100. Locking sleeve. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0032] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0033] In the present utility model, unless otherwise specified, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings, or to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present utility model.

[0034] In order to solve the problem of poor performance of the locking mechanism of the extruder in the prior art, the present application provides a locking device for a rubber and plastic extruder and an extruder.

[0035] And, as Figure 1 and Figure 10 shown, the extruder in the present application has the following locking device for a rubber and plastic extruder. This device is suitable for locking two-layer molds of a single extruder and is also suitable for locking multi-layer molds of multiple extruders, such as two-composite extrusion heads, three-composite extrusion heads, four-composite extrusion heads, five-composite extrusion heads and other multi-extruder composite extrusion heads.

[0036] As Figures 1 to 10 shown, the locking device for a rubber and plastic extruder in the present application includes a frame assembly 10, an upper die 20, a lower die 30, a locking tie rod assembly 50, a first driving assembly 60 and a second driving assembly 70. The upper die 20 and the lower die 30 are both movably arranged on the frame assembly 10, and locking grooves 40 are respectively arranged on both sides of the upper die 20 and both sides of the lower die 30; there are at least two locking tie rod assemblies 50, at least one locking tie rod assembly 50 is respectively arranged on both sides of the upper die 20 and both sides of the lower die 30, and at least a part of the locking tie rod assembly 50 can enter or exit the locking groove 40; the first driving assembly 60 and the second driving assembly 70 are respectively drivingly connected to the locking tie rod assembly 50; at least a part of the first driving assembly 60 can drive the locking tie rod assembly 50 to enter or exit the locking groove 40; after the first driving assembly 60 drives the locking tie rod assembly 50 into the locking groove 40, the second driving assembly 70 drives the locking tie rod assembly 50 to move between a locking position and an unlocking position relative to the upper die 20 and the lower die 30.

[0037] When using the locking device of the rubber and plastic extruder in this application, when it is necessary to lock the upper die 20 and the lower die 30 of the extruder to achieve the locking of the extrusion head, the locking rod assembly 50 can be driven by the first driving component 60 first. And after the locking rod assembly 50 enters the locking groove 40, the locking rod assembly 50 can continue to be driven by the second driving component 70, so that the locking frame plate can move from the unlocking position to the locking position, thereby realizing the locking of the upper die 20 and the lower die 30. Since the locking device of the rubber and plastic extruder in this application uses the locking rod assembly 50 to replace the C-shaped door lock in the prior art, the locking device of the rubber and plastic extruder in this application occupies less space compared with the prior art. Therefore, the locking device of the rubber and plastic extruder in this application effectively solves the problem of poor performance of the locking mechanism of the extruder in the prior art.

[0038] It should be noted that the upper die 20 and the lower die 30 in the locking device of the rubber and plastic extruder in this application can be the upper die 20 and the lower die 30 provided on the extrusion head of the extruder. And the frame assembly 10 can also be the body of the extruder.

[0039] Specifically, there are an open state and a closed state between the upper die 20 and the lower die 30. When the upper die 20 and the lower die 30 move from the closed state to the open state, the upper die 20 and the lower die 30 move in a direction away from each other. When the locking rod assembly 50 is in the locking position, the upper die 20 and the lower die 30 are in the closed state. That is to say, before the first driving component 60 and the second driving component 70 drive the locking rod assembly 50 respectively, the upper die 20 and the lower die 30 need to move from the open state to the closed state first. And after the locking rod assembly 50 moves to the locking position, the locking rod assembly 50 can restrict the movement of the upper die 20 and the lower die 30, so that the upper die 20 and the lower die 30 are kept in the closed state to realize the locking of the upper die 20 and the lower die 30.

[0040] In a specific embodiment of the present application, the locking tie rod assembly 50 includes a connecting rod 51 and a locking rod 52. The first driving assembly 60 and the second driving assembly 70 are arranged close to the same end of the connecting rod 51 and are respectively drivingly connected to the connecting rod 51. The locking rod 52 is arranged at the end of the connecting rod 51 away from the first driving assembly 60 and the second driving assembly 70. When the locking tie rod assembly 50 is in the locking position, the locking rod 52 abuts against the outer surface of the upper die 20 or the outer surface of the lower die 30. That is to say, when the first driving assembly 60 drives the locking tie rod assembly 50, it actually drives the connecting rod 51 to enter or exit the locking groove 40. When the second driving assembly 70 drives the locking tie rod assembly 50 to move between the locking position and the unlocking position, it is actually the connecting rod 51 that drives the locking rod 52 to move. After moving to the locking position, the locking rod 52 abuts against the outer surface of the upper die 20 or the outer surface of the lower die 30, so as to be able to restrict the movement of the upper die 20 and the lower die 30 from the closed state to the open state.

[0041] Moreover, it should be noted that in the present application, for the locking grooves 40 on the upper die 20 and the lower die 30, locking grooves 40 are provided on both sides of the upper die 20 and the lower die 30 corresponding to the locking tie rod assembly 50, and the openings of the locking grooves 40 face the corresponding locking tie rod assemblies 50. At the same time, the upper and lower ends of the upper die 20 and the upper and lower ends of the lower die 30 are penetrated by the locking grooves 40. At this time, it can be ensured that the locking rod 52 can abut against the upper surface of the upper die 20, that is, the surface of the upper die 20 away from the lower die 30, or abut against the lower surface of the lower die 30, that is, the surface of the lower die 30 away from the upper die 20.

[0042] Preferably, the axes of the connecting rod 51 and the locking rod 52 are perpendicular to each other. By setting like this, not only can the locking rod 52 be prevented from entering the locking groove 40, but also the contact area between the locking rod 52 and the upper die 20 or the lower die 30 can be effectively increased, thus ensuring the locking effect of the locking tie rod assembly 50 on the upper die 20 and the lower die 30. Moreover, in order to further improve the locking effect of the locking rod, a locking sleeve 100 can be sleeved outside the locking rod, so as to further increase the contact area between the locking rod 52 and the upper die 20 or the lower die 30.

[0043] Specifically, the locking device of the rubber and plastic extruder further includes at least two eccentric shafts 80. The second driving assembly 70 drives different locking rod assemblies 50 to move between a locking position and an unlocking position through different eccentric shafts 80. The second driving assembly 70 drives the eccentric shaft 80 to rotate. The circumferential side wall of the eccentric shaft 80 has an eccentric structure 81, and the locking rod assembly 50 is sleeved on the eccentric structure 81. In this application, one end of the connecting rod 51 is connected to the locking rod 52, and the other end of the connecting rod 51 is sleeved on the eccentric structure 81. As the second driving assembly 70 drives the eccentric shaft 80 to rotate, the eccentric shaft 80 can drive the connecting rod 51 to move along the axial direction of the connecting rod 51, so as to realize the switching of the locking rod assembly 50 between the locking position and the unlocking position. At the same time, it should be noted that in this application, the skew structure is arranged around the axial side wall of the eccentric shaft 80, and there is an eccentricity between the center of the eccentric structure 81 and the center of the eccentric shaft 80. At this time, the maximum distance for the locking rod assembly 50 to move between the locking position and the unlocking position is 2 times the eccentricity.

[0044] In a specific embodiment of this application, the eccentric shaft 80 includes a rotary cylindrical portion 82, an eccentric cylindrical portion, and a driving cylindrical portion 83. The rotary cylindrical portion and the driving cylindrical portion are connected to each other and their axes are on the same straight line. The second driving assembly is connected to the driving cylindrical portion, and the connecting rod 51 is connected to the eccentric cylindrical portion. The eccentric cylindrical portion is the above-mentioned eccentric structure 81. Moreover, the eccentric cylinder is located at the middle position in the axial direction of the rotary cylindrical portion, that is, the rotary cylindrical portion can be regarded as two parts and these two parts are located at both ends of the eccentric cylindrical portion, and the distance between the axis of the eccentric cylindrical portion and the axis of the rotary cylinder is the above-mentioned eccentricity. Preferably, two eccentric shaft seats 90 are also correspondingly arranged on the lower die. The two ends of the rotary cylindrical portion 82 respectively pass through different eccentric shaft seats and rotate relative to the eccentric shaft seats 90.

[0045] In a specific embodiment of the present application, both the locking tie rod assembly 50 and the first driving assembly 60 are two. Different first driving assemblies 60 are drivingly connected to different locking tie rod assemblies 50. The two locking tie rod assemblies 50 are symmetrically arranged on both sides of the upper die 20 and the lower die 30. The second driving assembly 70 is one and is drivingly connected to the two locking tie rod assemblies 50. Preferably, the second driving assembly 70 includes: a driving cylinder 71. Both the first driving assembly 60 and the driving cylinder 71 are arranged on the side of the upper die 20 away from the lower die 30 or both the first driving assembly 60 and the driving cylinder 71 are arranged on the side of the lower die 30 away from the upper die 20; two rocker arms 72. The driving cylinder 71 is connected to different eccentric shafts 80 through different rocker arms 72. The driving cylinder 71 drives the two rocker arms 72 to swing in a direction away from or close to each other, and the rocker arm 72 swings with the end connected to the eccentric shaft 80 as the center. For the rubber and plastic extruder locking device in this embodiment, it is mainly adapted to an extruder with one extrusion head. At this time, the distance between the upper die 20 and the lower die 30 is relatively small. As Figures 1 to 4 shown, in this embodiment, the first driving assembly 60 and the second driving assembly 70 can be respectively arranged on the lower die 30. And when the locking tie rod assembly 50 is in the locking position, the locking rod 52 of the locking tie rod assembly 50 abuts against the upper surface of the upper die 20. And, in this embodiment, the same locking tie rod assembly 50 locks both the upper die 20 and the lower die 30 at the same time. It should also be added that at this time, when the first driving assembly drives the locking tie rod assembly, it only drives the locking tie rod assembly to enter or exit the locking groove of the upper die. Of course, in the present application, a driving oil cylinder can also be used instead of the driving cylinder.

[0046] In another specific embodiment of the present application, both the locking tie rod assembly 50, the first driving assembly 60 and the second driving assembly 70 are four and are in one-to-one correspondence. Two locking tie rod assemblies 50 are symmetrically arranged on both sides of the upper die 20, and two locking tie rod assemblies 50 are symmetrically arranged on both sides of the lower die 30. Preferably, the first driving assembly 60 and the second driving assembly 70 are respectively arranged on the frame assembly 10. The second driving assembly 70 includes: a driving cylinder 71. The driving cylinder 71 is arranged on the frame assembly 10; a rocker arm 72. The driving cylinder 71 is connected to the eccentric shaft 80 through the rocker arm 72, and the rocker arm 72 swings with the end connected to the eccentric shaft 80 as the center. For the rubber and plastic extruder locking device in this embodiment, it is mainly adapted to an extruder with multiple extrusion heads. At this time, the distance between the upper die 20 and the lower die 30 is relatively large. As Figure 10As shown, in this embodiment, the first driving component 60 and the second driving component 70 can be respectively arranged on the frame, and in this embodiment, the same locking tie rod component 50 only locks the corresponding upper die 20 or lower die 30. Therefore, in this embodiment, multiple locking tie rod components 50, multiple first driving components 60 and multiple second driving components 70 move synchronously. Of course, as Figure 11 shown, the second driving component 70 and the eccentric shaft 80 can also be driven in the form of a gear and rack or a worm and worm gear.

[0047] Moreover, for the extruder in this application, the frame assembly 10 includes a frame body 11 and a head main board seat 12, and the upper die 20 and the lower die 30 are respectively movably connected to the head main board seat 12. When the first driving component 60 and the second driving component 70 are respectively arranged on the frame assembly 10, the first driving component 60 and the second driving component 70 are actually arranged on the head main board seat 12. Of course, a hinge assembly or a driving oil cylinder for driving the upper die 20 and the lower die 30 to open and close is also arranged on the head main board seat 12 of the rubber and plastic extruder locking device of the extruder.

[0048] Moreover, in this application, the first driving component can be a swing cylinder and drive the locking tie rod component to swing.

[0049] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0050] 1. Effectively solve the problem of poor performance of the locking mechanism of the existing extruder;

[0051] 2. The structure is simple and the performance is stable.

[0052] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0053] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0055] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A locking device for a rubber and plastic extruder, characterized in that: include: Frame assembly (10); Upper mold(20); A lower die (30), wherein the upper die (20) and the lower die (30) are both movably arranged on the frame assembly (10), and locking grooves (40) are respectively arranged on both sides of the upper die (20) and both sides of the lower die (30); A locking rod assembly (50), wherein there are at least two locking rod assemblies (50), at least one locking rod assembly (50) is disposed on both sides of the upper mold (20) and the lower mold (30), respectively, and at least a portion of the locking rod assembly (50) can enter or exit the locking groove (40); A first drive assembly (60); A second driving assembly (70), wherein the first driving assembly (60) and the second driving assembly (70) are respectively drivingly connected to the locking rod assembly (50); At least a portion of the first driving assembly (60) is capable of driving the locking rod assembly (50) to enter or exit the locking groove (40); When the first driving assembly (60) drives the locking rod assembly (50) to enter the locking groove (40), the second driving assembly (70) drives the locking rod assembly (50) to move between a locking position and an unlocking position relative to the upper mold (20) and the lower mold (30).

2. The locking device for a rubber and plastic extruder according to claim 1, characterized in that: The upper mold (20) and the lower mold (30) have an open state and a closed state. When the upper mold (20) and the lower mold (30) move from the closed state to the open state, the upper mold (20) and the lower mold (30) move in a direction away from each other. When the locking rod assembly (50) is in the locking position, the upper mold (20) and the lower mold (30) are in the closed state.

3. The locking device for a rubber and plastic extruder according to claim 1, characterized in that: The locking rod assembly (50) comprises: A connecting rod (51), wherein the first driving assembly (60) and the second driving assembly (70) are arranged near the same end of the connecting rod (51) and are respectively drivingly connected to the connecting rod (51); a locking rod (52), the locking rod (52) being arranged at one end of the connecting rod (51) away from the first driving assembly (60) and the second driving assembly (70); When the locking pull rod assembly (50) is in the locking position, the locking rod (52) abuts against the outer surface of the upper mold (20) or the outer surface of the lower mold (30).

4. The locking device for a rubber and plastic extruder according to claim 3, characterized in that: The axial directions of the connecting rod (51) and the locking rod (52) are perpendicular to each other.

5. The locking device for a rubber and plastic extruder according to any one of claims 1 to 4, characterized in that: The rubber plastic extruder locking device also includes at least two eccentric shafts (80), and the second drive assembly (70) drives different locking rod assemblies (50) to move between the locking position and the unlocking position through different eccentric shafts (80). The second drive assembly (70) drives the eccentric shaft (80) to rotate, and the eccentric shaft (80) has an eccentric structure (81), and the locking rod assembly (50) is sleeved on the eccentric structure (81).

6. The locking device for a rubber and plastic extruder according to claim 5, characterized in that: There are two locking rod assemblies (50) and two first driving assemblies (60), different first driving assemblies (60) are drivingly connected to different locking rod assemblies (50), the two locking rod assemblies (50) are symmetrically arranged on both sides of the upper mold (20) and the lower mold (30), and there is one second driving assembly (70) which is drivingly connected to the two locking rod assemblies (50).

7. The locking device for a rubber and plastic extruder according to claim 6, characterized in that: The second driving assembly (70) comprises: a driving cylinder (71), wherein the first driving assembly (60) and the driving cylinder (71) are both arranged on a side of the upper mold (20) away from the lower mold (30), or the first driving assembly (60) and the driving cylinder (71) are both arranged on a side of the lower mold (30) away from the upper mold (20); Two rocker arms (72), the driving cylinder (71) is connected to different eccentric shafts (80) through different rocker arms (72), the driving cylinder (71) drives the two rocker arms (72) to swing in directions moving away from or approaching each other, and the rocker arms (72) swing around the end connected to the eccentric shaft (80) as the center of the circle.

8. The locking device for a rubber and plastic extruder according to any one of claims 1 to 4, characterized in that: There are four locking rod assemblies (50), four first drive assemblies (60) and four second drive assemblies (70) in one-to-one correspondence. Two locking rod assemblies (50) are symmetrically arranged on both sides of the upper mold (20), and two locking rod assemblies (50) are symmetrically arranged on both sides of the lower mold (30).

9. The locking device for a rubber and plastic extruder according to claim 7, characterized in that: The first drive assembly (60) and the second drive assembly (70) are respectively arranged on the frame assembly (10), and the second drive assembly (70) comprises: A driving cylinder (71), wherein the driving cylinder (71) is arranged on the frame assembly (10); A rocker arm (72), the driving cylinder (71) is connected to the eccentric shaft (80) through the rocker arm (72), and the rocker arm (72) swings with one end connected to the eccentric shaft (80) as the center of a circle.

10. An extruder, characterized in that: A rubber and plastic extruder locking device comprising the locking device of any one of claims 1 to 9.

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