Protective mechanism for extrusion head of plastic extruder

Abstract

The utility model relates to the technical field of extruders, in particular to a protection mechanism for an extrusion head of a plastic extruder, which comprises an extrusion head and an unblocking screw tap arranged below the extrusion head, the extrusion head comprises a heating block, an extrusion head cap and a feed delivery pipe, and the feed delivery pipe penetrates through the heating block and the extrusion head cap; during use, the two protective cover blocks are driven by the driving assembly to protect the extrusion head cap, meanwhile, in the process, a jacking cover located on the side of the extrusion head cap can push the inclined upper end faces of the protective cover blocks so as to drive a lifting base to slide downwards along a sliding column on an overturning arm, and when the lifting base slides downwards, a first rack can also be driven to slide downwards synchronously; and the unblocking screw tap is driven by the gear and the second rack on the other side to slide upwards until the unblocking screw tap penetrates through the avoiding opening and extends into the extrusion port of the extrusion head cap, so that curing and blocking are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder technical field especially relates to a kind of protective mechanism for the extrusion head of plastic extruder. BACKGROUND

[0002] In order to ensure that the extrusion head of plastic extruder is long-term stable operation and keeps good working performance, effective protective measures must be taken, and the prior art often clears the plug of the extrusion head by tap, for example, a kind of protective mechanism for the extrusion head of extruder is disclosed in Chinese patent with application No.CN202021317582.3, including fixed component, extrusion head, clearing plug tap and power component, when the extrusion head is blocked, first, power component drives clearing plug tap to move to working position, then the output part of power component drives clearing plug tap to rotate to dredge the extrusion head, when dredging is finished, power component drives clearing plug tap to return to initial position, by the mutual cooperation of the above components, a kind of protective mechanism for the extrusion head of integrated extruder that can quickly clean the blockage of extrusion head is realized. However, the mode that power component drives clearing plug tap to rotate to dredge the extrusion head, once clearing plug tap deviates due to mechanical error, there is the risk of damage to the inside of the extrusion head, and when the extruder is not working, the extrusion head is still exposed to air, which is easy to block again. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of protective mechanism for the extrusion head of plastic extruder to solve the technical problem of the mode that power component drives clearing plug tap to rotate to dredge the extrusion head, once clearing plug tap deviates due to mechanical error, there is the risk of damage to the inside of the extrusion head, and when the extruder is not working, the extrusion head is still exposed to air, which is easy to block again.

[0004] Based on the above purpose, the utility model provides a kind of protective mechanism for the extrusion head of plastic extruder, including extrusion head and the clearing plug tap being arranged below the extrusion head, the extrusion head includes heating block, extrusion head cap and material pipe, the material pipe is through the heating block and the extrusion head cap, the protective mechanism for the extrusion head also includes:

[0005] Protective cover block, the protective cover block at least has two, two the protective cover block are all set up with wrapping groove, the lower bottom wall of the wrapping groove is set up with the avoidance mouth, the upper surface of the protective cover block is inclined plane structure;

[0006] Top support cover, the top support cover is arranged in the side of the extrusion head cap, the lower end of the top support cover is matched with the upper surface of the protective cover block in horizontal direction;

[0007] Lifting seat, the protective cover block is installed in the side end of the lifting seat;

[0008] A drive assembly for driving the two protective shield blocks to protect the extrusion cap;

[0009] A transmission assembly for driving the unblocking tap through the clearance opening into the extrusion cap.

[0010] Furthermore, the driving component includes:

[0011] Mounting bracket, which is disposed below the extrusion head;

[0012] A cylinder, which is mounted on the side end of the mounting bracket;

[0013] A movable block, one end of which is hinged to the output end of the cylinder;

[0014] A tilting arm is rotatably mounted on the mounting frame, and the other end of the movable block is hinged to the tilting arm;

[0015] A sliding column is mounted on the mounting frame and the tilting arm, and the lifting seat is slidably mounted on the sliding column.

[0016] Furthermore, the transmission assembly includes:

[0017] A positioning seat, which is mounted on the tilting arm;

[0018] A gear, which is rotatably mounted on the positioning seat;

[0019] Rack 1, which is installed at the lower end of the lifting seat, meshes with one side of the gear;

[0020] Rack 2, which is slidably mounted on the tilting arm via a guide seat, and meshes with the other side of the gear;

[0021] A connector is mounted on the back of the rack two, and a clearing tap is adjustablely mounted on the connector.

[0022] A spring is sleeved on the sliding column, with one end of the spring abutting against the lifting seat and the other end of the spring abutting against the tilting arm.

[0023] Furthermore, a disassembly block is inserted into the lower end of the heating block, and the top support cover is detachably installed on the disassembly block.

[0024] Furthermore, when the output end of the cylinder is fully extended, the two protective cover blocks are in a merged state.

[0025] Further, two said protective cover blocks in the combined state, said wrapping groove wrapped in the extrusion head cap extrusion port.

[0026] Further, two said protective cover blocks in the combined state, said clear jam tap through the avoidance of the mouth and placed in the extrusion head cap.

[0027] Further, the upper part of the sliding column is screwed with an adjusting nut, and the adjusting nut is attached to the upper end surface of the lifting seat.

[0028] The beneficial effects of the utility model are: the protective mechanism of the extrusion head of the plastic extruder is used, two protective cover blocks are driven by the driving assembly to protect the extrusion head cap, and the inclined upper end surface of the protective cover block is pushed by the jacking cover on the side of the extrusion head cap in the process to drive the lifting seat to slide downward along the sliding column on the turnover arm, the lifting seat also drives the rack one to slide downward synchronously, the jam clearing tap is driven to slide upward through the gear and the rack two on the other side, and the jam clearing tap penetrates the avoidance of the mouth and extends into the extrusion port of the extrusion head cap, so that solidification jamming is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0030] Figure 1 It is a structural schematic view of the utility model;

[0031] Figure 2 It is an assembly schematic view of the driving assembly and the transmission assembly in the utility model;

[0032] Figure 3 It is an assembly schematic view of part of the structure;

[0033] Figure 4 It is an assembly schematic view of the extrusion head and the jacking cover in the utility model;

[0034] Figure 5 It is a state schematic view of the jacking cover and the protective cover block in the utility model.

[0035] Marked as in the figure:

[0036] 1, clear jam tap; 2, heating block; 3, extrusion head cap; 4, material conveying pipe; 5, protective cover block; 6, wrapping groove; 7, avoiding mouth; 8, top support cover; 9, lifting seat; 10, mounting frame; 11, air cylinder; 12, movable block; 13, turnover arm; 14, positioning seat; 15, gear; 16, rack one; 17, rack two; 18, connector; 19, spring; 20, dismounting block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed in combination with specific embodiments.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. "Connection" or "connection" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] The first aspect of the utility model provides a kind of protective mechanism for extrusion head of plastic extruder, as shown in figure Figures 1-5 It includes extrusion head and the clear jam tap 1 arranged below extrusion head, and extrusion head includes heating block 2, extrusion head cap 3 and material conveying pipe 4, material conveying pipe 4 is through heating block 2 and extrusion head cap 3, and protective mechanism for extrusion head also includes:

[0040] Protective cover block 5, protective cover block 5 at least two, two protective cover blocks 5 are all provided with wrapping groove 6, avoiding mouth 7 is arranged on the lower bottom wall of wrapping groove 6, and the upper surface of protective cover block 5 is inclined surface structure;

[0041] Top support cover 8, top support cover 8 is arranged in the side of extrusion head cap 3, and the lower end of top support cover 8 is matched with the upper surface of protective cover block 5 in horizontal direction;

[0042] Lifting seat 9, protective cover block 5 is installed in the side end of lifting seat 9;

[0043] Driving assembly for driving two protective cover blocks 5 to protect extrusion head cap 3;

[0044] A transmission assembly for driving the clear-out tap 1 to pass through the avoiding opening 7 and enter the extrusion head cap 3.

[0045] In the embodiment, the driving assembly comprises:

[0046] A mounting frame 10, which is arranged below the extrusion head;

[0047] A cylinder 11, which is mounted at the side end of the mounting frame 10;

[0048] A movable block 12, one end of which is hinged to the output end of the cylinder 11;

[0049] A turnover arm 13, which is rotatably mounted on the mounting frame 10, and the other end of the movable block 12 is hinged to the turnover arm 13;

[0050] A sliding column, which is mounted on the mounting frame 10 and the turnover arm 13, and the lifting seat 9 is slidingly mounted on the sliding column.

[0051] In the embodiment, the transmission assembly comprises:

[0052] A positioning seat 14, which is mounted on the turnover arm 13;

[0053] A gear 15, which is rotatably mounted on the positioning seat 14;

[0054] A first rack 16, which is mounted at the lower end of the lifting seat 9, and the first rack 16 is engaged with one side of the gear 15;

[0055] A second rack 17, which is slidingly mounted on the turnover arm 13 through a guide seat, and the second rack 17 is engaged with the other side of the gear 15;

[0056] A connecting head 18, which is mounted at the back of the second rack 17, and the clear-out tap 1 is adjustably mounted on the connecting head 18;

[0057] A spring 19, which is sleeved on the sliding column, one end of the spring 19 abuts against the lifting seat 9, and the other end of the spring 19 abuts against the turnover arm 13.

[0058] In the embodiment, the lower end of the heating block 2 is inserted with a dismounting block 20, and the supporting cover 8 is detachably mounted on the dismounting block.

[0059] Working process and principle: in use, the two protective cover blocks 5 are combined to wrap and protect the extrusion head cap 3, and the clear-out tap 1 extends into the extrusion port of the extrusion head cap 3 to avoid solidification and blockage;

[0060] Specifically: start the cylinder 11 to make its output end stretch out, drive the turnover arm 13 to turn around the hinge through the movable block 12, and then drive the two side protective cover blocks 5 to merge, in the process, the top support cover 8 on the side of the extrusion head cap 3 pushes the inclined upper end surface of the protective cover block 5, to drive the lifting seat 9 to slide down along the sliding column on the turnover arm 13, the spring 19 is in the compressed state, and the lifting seat 9 slides down, and the rack one 16 also slides down synchronously, the toothed gear 15 and the other side rack two 17 drive the clearing jam tap 1 to slide up, until the clearance 7 is penetrated and the extrusion port of the extrusion head cap 3 is inserted, at this time, the outer edge of the port of the extrusion head cap 3 is in the wrapping groove 6 of the two side protective cover blocks 5, so as to protect the extrusion head cap 3 in time;

[0061] When the extruder works, the output end of the cylinder 11 is reset to return, so that the two side protective cover blocks 5 are opened again, and the clearing jam tap 1 can be pulled out from the extrusion port of the extrusion head cap 3 under the pushing action of the top support cover 8 and the elastic force of the spring 19 itself, and the extruder can work normally.

[0062] In the embodiment, the output end of the cylinder 11 is in a fully stretched state, and the two protective cover blocks 5 are in a merged state.

[0063] In the embodiment, the two protective cover blocks 5 are in a merged state, and the wrapping groove 6 wraps the extrusion port of the extrusion head cap 3.

[0064] In the embodiment, the two protective cover blocks 5 are in a merged state, and the clearing jam tap 1 penetrates the clearance 7 and is placed in the extrusion head cap 3.

[0065] In the embodiment, as shown in the figure, Figure 2 The upper part of the sliding column is screwed with an adjusting nut, the adjusting nut is attached to the upper end surface of the lifting seat 9, the adjusting nut on the sliding column is loosened to adjust the installation height of the protective cover block 5 on the lifting seat 9, so as to adapt to the extrusion head of different extension lengths.

[0066] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope (including claims) of the utility model is limited to these examples; under the idea of the utility model, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, which are not provided in details for the sake of brevity.

[0067] The utility model aims at covering all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A protection mechanism for the extrusion head of a plastic extruder, comprising an extrusion head and a clearing tap (1) arranged below the extrusion head, the extrusion head comprising a heating block (2), an extrusion head cap (3) and a delivery tube (4) which penetrates the heating block (2) and the extrusion head cap (3), characterized in that, The protection mechanism of the extrusion head further comprises: a protection cover block (5), at least two of which are provided with a wrapping groove (6), and the lower bottom wall of the wrapping groove (6) is provided with an avoiding opening (7), and the upper surface of the protection cover block (5) is an inclined surface structure; a top support cover (8) arranged at the side of the extrusion head cap (3), and the lower end of the top support cover (8) is matched with the upper surface of the protection cover block (5) in the horizontal direction; a lifting seat (9), and the protection cover block (5) is installed at the side end of the lifting seat (9); a driving assembly for driving the two protection cover blocks (5) to protect the extrusion head cap (3); a transmission assembly for driving the clear-out tap (1) to penetrate the avoiding opening (7) and enter the extrusion head cap (3).

2. The protection mechanism for the extrusion head of a plastic extruder according to claim 1, characterized in that The driving assembly comprises: a mounting frame (10) arranged below the extrusion head; a pneumatic cylinder (11) installed at the side end of the mounting frame (10); a movable block (12) hinged at one end to the output end of the pneumatic cylinder (11); a turnover arm (13) rotationally installed on the mounting frame (10), and the other end of the movable block (12) is hinged to the turnover arm (13); a sliding column installed on the mounting frame (10) and the turnover arm (13), and the lifting seat (9) is slidingly installed on the sliding column.

3. The protection mechanism for the extrusion head of a plastic extruder according to claim 2, characterized in that The transmission assembly comprises: a positioning seat (14) installed on the turnover arm (13); a gear (15) rotationally installed on the positioning seat (14); a first rack (16) installed at the lower end of the lifting seat (9), and the first rack (16) is engaged with one side of the gear (15); a second rack (17) slidingly installed on the turnover arm (13) through a guide seat, and the second rack (17) is engaged with the other side of the gear (15); a connecting head (18) installed at the back of the second rack (17), and the clear-out tap (1) is adjustably installed on the connecting head (18); a spring (19) sleeved on the sliding column, one end of the spring (19) abuts against the lifting seat (9), and the other end of the spring (19) abuts against the turnover arm (13).

4. The protection mechanism for the extrusion head of a plastic extruder according to claim 1, characterized in that, The lower end of the heating block (2) is inserted with a dismounting block (20), and the top support cover (8) is detachably installed on the dismounting block.

5. The protection mechanism for the extrusion head of a plastic extruder according to claim 2, characterized in that, When the output end of the pneumatic cylinder (11) is fully extended, the two protection cover blocks (5) are in a combined state.

6. A protection mechanism for the extrusion head of a plastic extruder according to claim 5, characterized in that When the two protection cover blocks (5) are in the combined state, the wrapping groove (6) wraps the extrusion port of the extrusion head cap (3).

7. The protection mechanism for the extrusion head of a plastic extruder according to claim 5, characterized in that, When the two protection cover blocks (5) are in the combined state, the clear-out tap (1) penetrates the avoiding opening (7) and is placed in the extrusion head cap (3).

8. The protection mechanism for the extrusion head of a plastic extruder according to claim 2, characterized in that, The upper part of the sliding column is provided with an adjusting nut which is in contact with the upper end surface of the lifting seat (9).

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