Locking apparatus for rubber and plastic extruder, and extruder

Abstract

The present application provides a locking apparatus for a rubber and plastic extruder, and an extruder. The locking apparatus for a rubber and plastic extruder comprises: a frame assembly; an upper die and a lower die, the upper die and the lower die both being movably disposed on the frame assembly, and locking grooves being disposed at two sides of each of the upper die and both sides of the lower die; locking rod assemblies, there being at least two locking rod assemblies, the two sides of both the upper die and the lower die each being provided with at least one locking rod assembly, and at least a portion of a locking rod assembly being able to enter or exit a locking groove; a first driving assembly and a second driving assembly, the first driving assembly and the second driving assembly each having a driving connection with the locking rod assembly, at least a portion of the first driving assembly being able to drive the locking rod assemblies to enter or exit the locking grooves, and the second driving assembly driving the locking rod assembly to move relative to the upper die and the lower die between a locking position and an unlocking position. The present application addresses the problem in the prior art of extruder locking mechanisms having poor performance.

Description

Rubber plastic extruder locking device and extruder

[0001] The present application claims priority to the patent application with the application number 2024110542185, the title of the invention being "Rubber plastic extruder locking device and extruder", filed on August 01, 2024, with the State Intellectual Property Office of China. TECHNICAL FIELD

[0002] The present application relates to the field of rubber plastic extrusion equipment, in particular to a rubber plastic extruder locking device and extruder. BACKGROUND

[0003] At present, the locking of the extruder head of rubber parts such as rubber sheets, tire treads, tire sides, and triangular rubber parts is mostly in the form of a C-shaped door lock structure. The disadvantage of this structure is that the force application part of the C-shaped door lock is the upper hook and the lower hook on the side, and when force is applied to the upper and lower molds, the upper hook and the lower hook of the C-shaped door are subjected to shear stress, and the body of the door is subjected to bending stress. In order to improve the stress intensity, the volume of the C-shaped door needs to be increased, which results in high cost, and also has the disadvantages of occupying a large space and making operation and maintenance inconvenient.

[0004] Therefore, there is a problem of poor performance of the locking mechanism of the extruder in the prior art. SUMMARY

[0005] The embodiments of the present application provide a rubber plastic extruder locking device and extruder to solve the problem of poor performance of the locking mechanism of the extruder in the prior art.

[0006] In an embodiment of the present application, a rubber plastic extruder locking device is provided, comprising: a rack assembly; an upper mold; a lower mold, the upper mold and the lower mold are movably arranged on the rack assembly, and the two sides of the upper mold and the two sides of the lower mold are respectively provided with locking grooves; a locking pull rod assembly, the locking pull rod assembly is at least two, the two sides of the upper mold and the two sides of the lower mold are respectively provided with at least one locking pull rod assembly, and at least part of the locking pull 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 pull rod assembly; at least part of the first driving assembly can drive the locking pull rod assembly to enter or exit the locking groove; after the first driving assembly drives the locking pull rod assembly to enter 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 mold and the lower mold.

[0007] In a preferred embodiment of the present application, the upper mold and the lower mold have an open state and a closed state, when the upper mold and the lower mold move from the closed state to the open state, the upper mold and the lower mold move in a direction away from each other, and when the locking pull rod assembly is in the locking position, the upper mold and the lower mold are in the closed state.

[0008] In one preferred embodiment of the present application, the locking pull rod assembly comprises 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 is arranged at the end of the connecting rod away from the first driving assembly and the second driving assembly; when the locking pull 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.

[0009] In one preferred embodiment of the present application, the axial directions of the connecting rod and the locking rod are perpendicular to each other.

[0010] In one preferred embodiment of the present application, the rubber plastic extruder locking device further comprises 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 eccentric structures, and the locking pull rod assemblies are sleeved on the eccentric structures.

[0011] In one preferred embodiment of the present application, the locking pull rod assembly and the first driving assembly are both two, different first driving assemblies are drivingly connected with different locking pull rod assemblies, the two locking pull rod assemblies are symmetrically arranged on the two sides of the upper die and the lower die, and the second driving assembly is one and is drivingly connected with the two locking pull rod assemblies.

[0012] In one preferred embodiment of the present application, the second driving assembly comprises a driving cylinder, the first driving assembly and the driving cylinder are both arranged on the side of the upper die away from the lower die or the first driving assembly and the driving cylinder are both arranged on the side of the lower die away from the upper die; two rocker arms, the driving cylinder is connected with different eccentric shafts through different rocker arms, the driving cylinder drives the two rocker arms to swing in the direction away from or close to each other, and the rocker arm swings with the end connected with the eccentric shaft as the center.

[0013] In one preferred embodiment of the present application, the locking pull rod assembly, the first driving assembly and the second driving assembly are all four and one-to-one corresponding, two locking pull rod assemblies are symmetrically arranged on the two sides of the upper die, and two locking pull rod assemblies are symmetrically arranged on the two sides of the lower die.

[0014] In one preferred embodiment of the present application, the first driving assembly and the second driving assembly are respectively arranged on the rack assembly, the second driving assembly comprises a driving cylinder arranged on the rack assembly, and a rocker arm connected with the eccentric shaft through the driving cylinder and swinging with the end connected with the eccentric shaft as the center.

[0015] The present application also provides an extruder comprising the above-mentioned rubber plastic extruder locking device.

[0016] According to the technical scheme, the rubber and plastic extruder locking device comprises a rack assembly, an upper die, a lower die, locking pull rod assemblies, a first driving assembly and a second driving assembly. The upper die and the lower die are movably arranged on the rack assembly, and the two sides of the upper die and the two sides of the lower die are respectively provided with locking grooves. The locking pull rod assemblies are at least two, and the two sides of the upper die and the two sides of the lower die are respectively provided with at least one locking pull rod assembly. At least part of the locking pull rod assemblies can enter or exit the locking grooves. The first driving assembly and the second driving assembly are respectively drivingly connected with the locking pull rod assemblies. At least part of the first driving assembly can drive the locking pull rod assemblies to enter or exit the locking grooves. When the first driving assembly drives the locking pull rod assemblies to enter the locking grooves, the second driving assembly drives the locking pull rod assemblies to move between the locking position and the unlocking position relative to the upper die and the lower die.

[0017] When the upper die and the lower die of the extruder need to be locked to achieve the locking of the extruder head, the first driving assembly can be used to drive the locking pull rod assemblies, and then the second driving assembly can be used to drive the locking pull rod assemblies after the locking pull rod assemblies enter the locking grooves, so that the locking frame plate can move from the unlocking position to the locking position, thereby achieving the locking of the upper die and the lower die. Since the rubber and plastic extruder locking device uses the locking pull rod assemblies to replace the C-shaped door lock in the prior art, the rubber and plastic extruder locking device occupies less space compared with the prior art. Therefore, the rubber and plastic extruder locking device effectively solves the poor performance problem of the extruder locking mechanism in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Fig. 1 shows a structure schematic diagram of an extruder of one specific embodiment of the present application;

[0020] Fig. 2 shows a structure schematic diagram of a rubber and plastic extruder locking device of one specific embodiment of the present application;

[0021] Fig. 3 shows a structure schematic diagram of the locking pull rod assemblies of the rubber and plastic extruder locking device in Fig. 2 in the unlocking position;

[0022] Fig. 4 shows a structure schematic diagram of the locking pull rod assemblies of the rubber and plastic extruder locking device in Fig. 2 in the locking position;

[0023] Fig. 5 shows a side view of the upper die of the rubber and plastic extruder locking device of one specific embodiment of the present application;

[0024] Figure 6 shows a top view of the upper die of the rubber plastic extruder locking device according to an embodiment of the present application;

[0025] Figure 7 shows a structural schematic diagram of the locking pull rod assembly of the rubber plastic extruder locking device according to an embodiment of the present application;

[0026] Figure 8 shows a schematic diagram of the positional relationship between the connecting rod and the locking rod of the locking pull rod assembly of the rubber plastic extruder locking device according to an embodiment of the present application;

[0027] Figure 9 shows a structural schematic diagram of the eccentric shaft of the rubber plastic extruder locking device according to an embodiment of the present application;

[0028] Figure 10 shows a structural schematic diagram of the extruder according to another embodiment of the present application;

[0029] Figure 11 shows a schematic diagram of other transmission forms between the second driving assembly and the eccentric shaft in the present application.

[0030] In the above drawings, the following reference signs are used: 10, frame assembly; 11, frame body; 12, head main plate seat; 20, upper die; 30, lower die; 40, locking groove; 50, locking pull rod assembly; 51, connecting rod; 52, locking rod; 60, first driving assembly; 70, second driving assembly; 71, driving cylinder; 72, rocker arm; 80, eccentric shaft; 81, eccentric structure; 82, rotating cylindrical portion; 83, driving cylindrical portion; 90, eccentric shaft seat; 100, locking sleeve. DETAILED DESCRIPTION

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

[0032] In order to solve the poor performance problem of the locking mechanism of the existing extruder, the present application provides a rubber plastic extruder locking device and an extruder.

[0033] In addition, as shown in Figures 1 and 10, the extruder in the present application has the following rubber plastic extruder locking device. The device is suitable for locking two-layer dies of a single extruder and is also suitable for locking multi-layer dies of multiple extruders, such as two composite extruder heads, three composite extruder heads, four composite extruder heads, five composite extruder heads, and the like.

[0034] As shown in FIGS. 1-10, the rubber plastic extruder locking device in the present application comprises a rack assembly 10, an upper die 20, a lower die 30, a locking pull rod assembly 50, a first driving assembly 60 and a second driving assembly 70. The upper die 20 and the lower die 30 are movably arranged on the rack assembly 10, and the upper die 20 and the lower die 30 are respectively provided with locking grooves 40 on both sides. The locking pull rod assembly 50 is at least two, and the upper die 20 and the lower die 30 are respectively provided with at least one locking pull rod assembly 50, and at least part of the locking pull 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 with the locking pull rod assembly 50. At least part of the first driving assembly 60 can drive the locking pull rod assembly 50 to enter or exit the locking groove 40. When the first driving assembly 60 drives the locking pull rod assembly 50 to enter the locking groove 40, the second driving assembly 70 drives the locking pull rod assembly 50 to move relative to the upper die 20 and the lower die 30 between the locking position and the unlocking position.

[0035] When the upper die 20 and the lower die 30 of the extruder need to be locked to achieve the locking of the extruder head, the first driving assembly 60 can be used to drive the locking pull rod assembly 50, and after the locking pull rod assembly 50 enters the locking groove 40, the second driving assembly 70 can continue to drive the locking pull rod assembly 50, so that the locking frame plate can move from the unlocking position to the locking position, thereby achieving the locking of the upper die 20 and the lower die 30. Since the rubber plastic extruder locking device in the present application uses the locking pull rod assembly 50 to replace the C-type door lock in the prior art, the rubber plastic extruder locking device in the present application occupies less space compared with the prior art. Therefore, the rubber plastic extruder locking device in the present application effectively solves the poor performance problem of the extruder locking mechanism in the prior art.

[0036] It should be noted that the upper die 20 and the lower die 30 in the rubber plastic extruder locking device in the present application can be the upper die 20 and the lower die 30 arranged on the head of the extruder. And the rack assembly 10 can also be the body of the extruder.

[0037] Specifically, the upper die 20 and the lower die 30 have an open state and a closed state, and the upper die 20 and the lower die 30 move in a direction away from each other when the upper die 20 and the lower die 30 move from the closed state to the open state, and the upper die 20 and the lower die 30 are in the closed state when the locking pull rod assembly 50 is in the locking position. That is, before the first driving assembly 60 and the second driving assembly 70 drive the locking pull rod assembly 50 respectively, the upper die 20 and the lower die 30 need to be moved from the open state to the closed state first, and after the locking pull rod assembly 50 moves to the locking position, the locking pull rod assembly 50 can limit the movement of the upper die 20 and the lower die 30, so that the upper die 20 and the lower die 30 remain in the closed state to achieve the locking of the upper die 20 and the lower die 30.

[0038] In a specific embodiment of the present application, the locking pull 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 with the connecting rod 51, and 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 pull 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, when the first driving assembly 60 drives the locking pull rod assembly 50, it is actually driving the connecting rod 51 to enter or exit the locking slot 40, and when the second driving assembly 70 drives the locking pull rod assembly 50 to move between the locking position and the unlocking position, it is actually the connecting rod 51 driving the locking rod 52 to move, and 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 limit the movement of the upper die 20 and the lower die 30 from the closed state to the open state.

[0039] Moreover, it should be noted that in the present application, for the locking slot 40 on the upper die 20 and the lower die 30, the upper die 20 and the lower die 30 are provided with the locking slot 40 on both sides corresponding to the locking pull rod assembly 50, and the opening of the locking slot 40 faces the corresponding locking pull rod assembly 50, while 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 slot 40, at this time it can be guaranteed 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 the lower surface of the lower die 30, that is, the surface of the lower die 30 away from the upper die 20.

[0040] Preferably, the axial directions of the connecting rod 51 and the locking rod 52 are perpendicular to each other. By such an arrangement, not only can the locking rod 52 be prevented from entering the locking groove 40, but also the contact area of the locking rod 52 with the upper die 20 or the lower die 30 can be effectively increased, thereby ensuring the locking effect of the locking pull rod assembly 50 on the upper die 20 and the lower die 30. Furthermore, in order to further improve the locking effect of the locking rod, a locking sleeve 100 can be sleeved on the outside of the locking rod, thereby further increasing the contact area of the locking rod 52 with the upper die 20 or the lower die 30.

[0041] Specifically, the rubber plastic extruder locking device further comprises at least two eccentric shafts 80, the second driving assembly 70 drives different locking pull rod assemblies 50 to move between the locking position and the 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 pull rod assembly 50 is sleeved on the eccentric structure 81. In the present application, one end of the connecting rod 51 is connected with the locking rod 52, and the other end of the connecting rod 51 is sleeved on the eccentric structure 81, and 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, thereby realizing the switching of the locking pull rod assembly 50 between the locking position and the unlocking position. It should be noted that the eccentric structure 81 is arranged around the axial side wall of the eccentric shaft 80, and there is an eccentric distance between the center of the eccentric structure 81 and the center of the eccentric shaft 80, and the maximum distance of the locking pull rod assembly 50 between the locking position and the unlocking position is twice the eccentric distance.

[0042] In a specific embodiment of the present application, the eccentric shaft 80 comprises a rotating cylindrical portion 82, an eccentric cylindrical portion, and a driving cylindrical portion 83, the rotating cylindrical portion and the driving cylindrical portion are connected with each other and have the same axis, the second driving assembly is connected with the driving cylindrical portion, the connecting rod 51 is connected with the eccentric cylindrical portion, and the eccentric cylindrical portion is the above-mentioned eccentric structure 81. Furthermore, the eccentric cylindrical portion is located at the middle position of the axial direction of the rotating cylindrical portion, that is, the rotating cylindrical portion can be regarded as two parts and the two parts are located at the two ends of the eccentric cylindrical portion, and the distance between the axis of the eccentric cylindrical portion and the axis of the rotating cylindrical portion is the above-mentioned eccentric distance. Preferably, the lower die is further provided with eccentric shaft seats 90 corresponding to the eccentric shafts, the eccentric shaft seats 90 are two, and the two ends of the rotating cylindrical portion 82 pass through different eccentric shaft seats and rotate relative to the eccentric shaft seats 90.

[0043] In one specific embodiment of the present application, the locking pull rod assemblies 50 and the first driving assemblies 60 are both two, different first driving assemblies 60 are drivingly connected with different locking pull rod assemblies 50, the two locking pull rod assemblies 50 are symmetrically arranged on both sides of the upper die 20 and the lower die 30, and the second driving assembly 70 is one and is drivingly connected with the two locking pull rod assemblies 50. Preferably, the second driving assembly 70 comprises: a driving cylinder 71, the first driving assembly 60 and the driving cylinder 71 are both arranged on a side of the upper die 20 away from the lower die 30 or the first driving assembly 60 and the driving cylinder 71 are both arranged on a side of the lower die 30 away from the upper die 20; two rocker arms 72, the driving cylinder 71 is connected with different eccentric shafts 80 through different rocker arms 72, the driving cylinder 71 drives the two rocker arms 72 to swing in directions away from or close to each other, and the rocker arm 72 swings with the end connected with the eccentric shaft 80 as the center. For the rubber plastic extruder locking device in the present embodiment, it is mainly adapted to the extruder with one extruder head, at this time, the distance between the upper die 20 and the lower die 30 is small. As shown in FIGS. 1 to 4, in the present embodiment, the first driving assembly 60 and the second driving assembly 70 can be arranged on the lower die 30 respectively, and when the locking pull rod assembly 50 is in the locking position, the locking rod 52 of the locking pull rod assembly 50 abuts against the upper surface of the upper die 20. And in the present embodiment, the same locking pull rod assembly 50 simultaneously locks the upper die 20 and the lower die 30. It also needs to be supplemented that, at this time, when the first driving assembly drives the locking pull rod assembly, it is only to drive the locking pull rod assembly to enter or exit the locking slot of the upper die. Of course, a driving oil cylinder can also be used instead of the driving cylinder in the present application.

[0044] In another specific embodiment of the present application, the locking pull rod assemblies 50, the first driving assemblies 60 and the second driving assemblies 70 are all four and one-to-one corresponding, two locking pull rod assemblies 50 are symmetrically arranged on the two sides of the upper die 20, and two locking pull rod assemblies 50 are symmetrically arranged on the two sides of the lower die 30. Preferably, the first driving assemblies 60 and the second driving assemblies 70 are arranged on the rack assembly 10 respectively, and the second driving assembly 70 comprises: a driving cylinder 71 arranged on the rack assembly 10; and a rocker arm 72, the driving cylinder 71 is connected with the eccentric shaft 80 through the rocker arm 72, and the rocker arm 72 swings with the end connected with the eccentric shaft 80 as the center. For the rubber plastic extruder locking device in the embodiment, it is mainly adapted to the extruder with multiple extruder heads, and the distance between the upper die 20 and the lower die 30 is large at this time. As shown in FIG. 10, in the embodiment, the first driving assemblies 60 and the second driving assemblies 70 can be arranged on the rack respectively, and in the embodiment, the same locking pull rod assembly 50 only locks the corresponding upper die 20 or lower die 30. Therefore, in the embodiment, the multiple locking pull rod assemblies 50, the multiple first driving assemblies 60 and the multiple second driving assemblies 70 move synchronously. Of course, as shown in FIG. 11, the second driving assembly 70 and the eccentric shaft 80 can also be driven in the form of gear and rack or worm and screw.

[0045] And for the extruder in the present application, the rack assembly 10 comprises a rack body 11 and a head main plate seat 12, and the upper die 20 and the lower die 30 are movably connected with the head main plate seat 12. When the first driving assembly 60 and the second driving assembly 70 are arranged on the rack assembly 10 respectively, the first driving assembly 60 and the second driving assembly 70 are actually arranged on the head main plate seat 12. Of course, the head main plate seat 12 of the rubber plastic extruder locking device of the extruder is also provided with a hinge assembly or a driving oil cylinder for driving the upper die 20 and the lower die 30 to open and close.

[0046] And in the present application, the first driving assembly can be a swing cylinder and drive the locking pull rod assembly to swing.

[0047] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0048] 1. Effectively solve the problem of poor use performance of the locking mechanism of the extruder in the prior art;

[0049] 2. Simple structure and stable performance.

[0050] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rubber plastic extruder locking device, characterized by, include: Rack assembly (10); Upper mold(20); The lower mold (30) and the upper mold (20) and the lower mold (30) are both movably disposed on the frame assembly (10), and locking grooves (40) are respectively provided on both sides of the upper mold (20) and both sides of the lower mold (30); Locking rod assembly (50), wherein there are at least two locking rod assemblies (50), and at least one locking rod assembly (50) is provided on each side of the upper mold (20) and the lower mold (30), and at least a portion of the locking rod assembly (50) can enter or exit the locking groove (40); First drive component (60); The second drive assembly (70) is connected to the locking lever assembly (50) in a drive connection, with the first drive assembly (60) and the second drive assembly (70) respectively being driven to the locking lever assembly (50). At least a portion of the first drive assembly (60) is capable of driving the locking lever assembly (50) into or out of the locking groove (40); When the first drive assembly (60) drives the locking rod assembly (50) into the locking groove (40), the second drive assembly (70) drives the locking rod assembly (50) to move relative to the upper mold (20) and the lower mold (30) between the locking position and the unlocking position.

2. The rubber plastic extruder locking device of claim 1, wherein, 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 rubber plastic extruder locking device of claim 1, wherein, The locking lever assembly (50) includes: The connecting rod (51) is provided with the first driving assembly (60) and the second driving assembly (70) near the same end of the connecting rod (51) and are respectively driven to the connecting rod (51); A locking lever (52) is disposed at one end of the connecting rod (51) away from the first drive assembly (60) and the second drive assembly (70); When the locking lever assembly (50) is in the locked position, the locking lever (52) abuts against the outer surface of the upper mold (20) or the outer surface of the lower mold (30).

4. The rubber plastic extruder locking device of claim 3, wherein, The axes of the connecting rod (51) and the locking rod (52) are perpendicular to each other.

5. Rubber plastic extruder locking device according to any of claims 1 to 4, characterized in that The locking device for the rubber and plastic extruder also includes at least two eccentric shafts (80). 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 shafts (80) to rotate. The eccentric shafts (80) have eccentric structures (81). The locking rod assemblies (50) are sleeved on the eccentric structures (81).

6. The rubber plastic extruder locking device of claim 5, wherein, The locking pull rod assembly (50) and the first driving assembly (60) are two, different first driving assemblies (60) are drivingly connected with different locking pull rod assemblies (50), two locking pull rod assemblies (50) are symmetrically arranged on two sides of the upper die (20) and the lower die (30), and the second driving assembly (70) is one and is drivingly connected with the two locking pull rod assemblies (50).

7. The rubber plastic extruder locking device of claim 6, wherein, The second driving assembly (70) comprises: A driving cylinder (71), the first driving assembly (60) and the driving cylinder (71) are arranged on one side of the upper die (20) away from the lower die (30) or the first driving assembly (60) and the driving cylinder (71) are arranged on one side of the lower die (30) away from the upper die (20); Two rocker arms (72), the driving cylinder (71) is connected with different eccentric shafts (80) through different rocker arms (72), the driving cylinder (71) drives two rocker arms (72) to swing in directions away from or close to each other, and the rocker arm (72) swings with one end connected with the eccentric shaft (80) as the center.

8. The rubber plastic extruder locking device according to any one of claims 1 to 4, wherein, The locking pull rod assembly (50), the first driving assembly (60) and the second driving assembly (70) are four and one-to-one corresponding, two locking pull rod assemblies (50) are symmetrically arranged on two sides of the upper die (20), and two locking pull rod assemblies (50) are symmetrically arranged on two sides of the lower die (30).

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

10. An extruder characterized by, The rubber plastic extruder locking device of any one of claims 1-9 is included.

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