Quick screen changing rubber filter

Abstract

The invention relates to the technical field of rubber machinery, in particular to a quick screen-changing rubber filter machine, which overcomes the problem that the existing quick screen-changing rubber filter machine does not stop for screen changing but is prone to rubber leakage. The solution is to have a barrel with an inner screw, a sliding seat is provided at the mouth of the barrel, the sliding seat comprises a rear slide and a front slide, the front slide and the rear slide clamp a hole plate that can slide left and right, the hole plate has two groups of rubber-passing holes corresponding to the barrel mouth after sliding, the rear end surface of each group of rubber-passing holes is provided with a filter screen for filtering the rubber extruded by the screw, one group of rubber-passing holes is located in the sliding seat, and the other group of rubber-passing holes is located outside, the rear slide is provided with an inner sealing ring that contacts the inner side surface of the hole plate to prevent the rubber from overflowing, the front slide is provided with an outer sealing ring that contacts the outer side surface of the hole plate to prevent the rubber from overflowing, the front slide is provided with a first adjusting bolt that pushes the hole plate to make the hole plate and the inner sealing ring tightly attached, and the front slide is also provided with a second adjusting bolt that pushes the outer sealing ring to make the outer sealing ring and the hole plate tightly attached.

Description

Technical Field

[0001] The invention relates to the technical field of rubber machinery, in particular to a fast screen-changing rubber filter. Background Art

[0002] The rubber filter is a machine that uses the pushing and conveying action of the screw to remove impurities from rubber or reclaimed rubber. The machine is mainly composed of a screw, a barrel, a rubber filter head and a transmission device. The rubber filter head is equipped with a perforated plate and a filter screen. The perforated plate is used to support the filter screen and serves as a discharge port. Its aperture is generally 4 to 8 mm. The molten rubber is extruded by the screw, filtered through the filter screen of the head, and then discharged from the discharge port.

[0003] During the operation of the rubber filter, the mesh of the filter will be blocked by foreign particles and the filter needs to be replaced. The degree of impurity in the rubber determines the replacement frequency of the filter. A rubber filter that can quickly replace the filter will have higher productivity. Furthermore, if the filter can be replaced without stopping the machine, it will be a more ideal rubber filter.

[0004] There was once a rubber filter that could change the screen without stopping the machine, as shown in the attached Figure 1 and 2 As shown, a hole plate 2' pushed by a cylinder 1' slides left and right on the machine head. The hole plate 2' has two groups of glue-passing holes with filter screens attached. The filter screen is arranged on the rear end surface of the glue-passing holes through a pressure ring. The machine head has a front slide 3' and a rear slide 4'. The front slide 3' and the rear slide 4' are combined to form a structure that is tightly sleeved on the hole plate 2'. When the first group of glue-passing holes on the hole plate 2' is located between the front slide 3' and the rear slide 4', the group of glue-passing holes corresponds to the barrel mouth that receives the screw push. The molten glue is delivered, and the group of glue holes is in the working position. At the same time, the second group of glue holes is located outside the front slide 3' and the rear slide 4', so that the filter screen at the second group of glue holes can be replaced. When the filter screen at the first group of glue holes needs to be replaced, the oil cylinder 1' pushes and pulls the second group of glue holes to the barrel mouth, and then replaces the filter screen at the first group of glue holes on the outside. This method of alternating screen replacement has a shorter action process time and the equipment does not need to be shut down.

[0005] Although the above-mentioned rubber filter has the significant advantage of allowing non-stop screen replacement, it has not been widely used. The main reason is that rubber leakage is prone to occur between the mating orifice plate and the front and rear slides. Specifically, although wear-resistant sealing rings are installed between the orifice plate and the front and rear slides, all parts are metal parts. The use of metal parts is because mechanical technicians require that the sliding structure have a certain temperature and the components of the colloid seal are accustomed to using metal materials with stable shape and easy to control dimensional accuracy. However, due to the reasons of machining accuracy, the parallelism of each surface of each part still has errors, and the gaps at the mating joints cause rubber leakage. Secondly, the melting temperatures of various rubber materials are different, and the different heating temperatures of the equipment cause different deformations of the metal parts due to thermal expansion and contraction, which will change the gaps at the mating joints. Users will inevitably experience varying degrees of rubber leakage throughout the life cycle of the equipment. Users cannot overcome the problem of rubber leakage themselves, and equipment manufacturers cannot provide effective solutions. Therefore, this equipment has never been able to gain market share. More users passively accept rubber filter equipment that requires shutdown for screen replacement but has good sealing performance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the problem that the existing rapid screen-changing rubber filter can realize screen changing without stopping the machine but is prone to rubber leakage.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a fast screen-changing rubber filter, which has a barrel with a built-in screw, and a sliding seat is provided at the mouth of the barrel, and the sliding seat includes a rear slide and a front slide, the rear slide is fixed to the barrel or is integrally provided with the barrel, and the front slide is fixed to the front of the rear slide, and the front slide and the rear slide clamp a hole plate that can slide left and right, and the sliding seat and the hole plate form a set relationship, and the hole plate has two groups of glue-passing holes that correspond to the mouth of the barrel after sliding left and right, and each group of glue-passing holes has a hole on the rear end surface. A filter is provided for filtering the rubber extruded by the screw. When one group of rubber-passing holes is located inside the sliding seat, the other group of rubber-passing holes is located outside the sliding seat. The rear sliding seat is provided with an inner sealing ring that contacts the inner side surface of the orifice plate to prevent the rubber from overflowing. The front sliding seat is provided with an outer sealing ring that contacts the outer side surface of the orifice plate to prevent the rubber from overflowing. A first adjusting bolt that pushes the orifice plate to make the orifice plate and the inner sealing ring fit tightly is distributed on the front sliding seat. A second adjusting bolt that pushes the outer sealing ring to make the outer sealing ring and the orifice plate fit tightly is also distributed on the front sliding seat.

[0008] In the above scheme, the front-back direction is defined as the direction of movement of the rubber material as the front, the left and right sliding of the orifice plate refers to the horizontal sliding of the orifice plate perpendicular to the axis of the screw, the orifice plate is driven by a cylinder, the cylinder is set on the sliding seat through a supporting device, and the movable end of the cylinder is connected to the orifice plate; the meaning that the rear slide is fixed to the barrel or is integrated with the barrel includes that when the rear slide is an assembly, a component in the assembly is fixed to the barrel or is integrated with the barrel. This is because the barrel is generally cylindrical and the outer contour of the rear slide is rectangular. The use of an assembly with a transition piece can simplify the processing technology of the parts; the inner sealing ring and the outer sealing ring can be made of plastic, nylon, copper and other special materials with heat-resistant and wear-resistant properties; the rubber group hole on the orifice plate can be directly machined on the orifice plate or on the orifice disk, and the orifice disk is then assembled on the orifice plate to form a replaceable structure; the head of the first adjusting bolt can be provided with a wear-resistant insert or a fixed wear-resistant pad.

[0009] In order to make the thrust of the first adjusting bolt act evenly on the inner sealing ring through the orifice plate, the first adjusting bolts are distributed on the front slide in two rows symmetrically with the horizontal plane where the horizontal center line of the inner sealing ring is located as the symmetry plane, and there are at least two first adjusting bolts in each row arranged at intervals.

[0010] In order to make the thrust exerted on the outer sealing ring uniform, at least four second adjusting bolts are distributed on the front sliding seat in a circle with the axis of the outer sealing ring as the axis.

[0011] In order to facilitate the sliding of the orifice plate, an appropriate amount of lubricating oil needs to be accurately added between the orifice plate and the first adjusting bolt. The first adjusting bolt is provided with a first oil filling hole for filling lubricating oil to the sliding surface of the orifice plate. An oiler can be provided in the first oil filling hole. A small amount of lubricating oil is added each time by pressing the oiler. The amount of oil added needs to be controlled to a level that does not contaminate the rubber material.

[0012] In order to make the outer end surface of the outer sealing ring bear the force evenly and ensure the service life of the outer sealing ring, the outer end of the outer sealing ring does not have a washer, and the second adjusting bolt pushes on the washer.

[0013] In order to ensure smooth sliding of the orifice plate, the sliding seats at the upper and lower sides of the orifice plate are provided with second oil filling holes for filling lubricating oil on the upper and lower sides. Similarly, an oiler can be provided on the second oil filling holes.

[0014] The beneficial effects of the present invention are:

[0015] First, the present invention provides a first adjusting bolt and a second adjusting bolt on the front slide to push the orifice plate tightly against the inner sealing ring and the outer sealing ring tightly against the orifice plate. This changes the traditional structural concept of the non-stop screen changing rubber filter machine, which seeks to prevent glue leakage by improving processing accuracy. It also overcomes the limitation of the existing inner and outer sealing rings, which are limited to metal parts with stable shape and easy processing accuracy.

[0016] Second, the equipment provides users with a means to adjust the gap between the orifice plate and the inner and outer sealing rings. Under the action of the adjusted pressure, the two end faces of the inner sealing ring, which bears the greater pressure of the rubber material, have good sealing performance. Users can adjust the gap by themselves when filtering different rubber materials, meeting the needs of customers and making this rubber filter with non-stop screen change truly widely used;

[0017] 3. Setting oil filling holes can improve the sliding smoothness of the orifice plate and can accurately fill oil to prevent the lubricating oil from contaminating the rubber compound. Since the orifice plate slides left and right on the sliding seat, the original equipment does not have a special oil filling hole for lubrication. It only prompts to brush an appropriate amount of lubricating oil on the sliding part of the orifice plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the orifice plate of an existing non-stop screen changing rubber filter along the screw axis;

[0019] Figure 2 This is a diagram showing the coordination relationship between the orifice plate and the front and rear slides along the screw axis of an existing non-stop screen changing rubber filter;

[0020] Figure 3 It is a cross-sectional view of the orifice plate of the present invention along the screw axis;

[0021] Figure 4 This is a diagram of the matching relationship between the orifice plate and the front and rear slides along the screw axis direction of the present invention;

[0022] Figure 1 and 2 Middle: 1′, oil cylinder, 2′, orifice plate, 3′, front slide, 4′, rear slide;

[0023] Figure 3 and 4 Middle: 1. Screw, 2. Barrel, 3. Rear slide, 4. Front slide, 5. Orifice plate, 6. Glue group hole, 7. Inner sealing ring, 8. Outer sealing ring, 9. First adjusting bolt, 10. Second adjusting bolt, 11. First oil filling hole, 12. Washer, 13. Second oil filling hole. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0025] Since the present invention is only for the innovation of the rubber filter head, the attached Figure 3 and 4 Only the structure of the head of the rubber filter of the present invention is shown, and the rest of the structure such as the base, the feeding device and the speed reduction drive device are not shown.

[0026] As attached Figure 3 and 4 The quick screen-changing rubber filter machine has a barrel 2 with a screw 1 inside. The mouth of the barrel 2 is provided with a sliding seat. The sliding seat includes a rear slide 3 and a front slide 4. The rear slide 3 is fixed to the barrel 2. The rear slide 3 is an assembly. There are parts fixedly connected to the barrel 2 and parts fixedly connected to the front slide 4 in the assembly. The front slide 4 is fixed to the front of the rear slide 3. The front slide 4 and the rear slide 3 clamp a hole plate 5 that can slide left and right. The hole plate 5 has two groups of rubber group holes 6 that correspond to the mouth of the barrel 2 after sliding left and right. The rear end surface of each group of rubber group holes 6 is provided with a filter screen for filtering the rubber material extruded by the screw 1. Due to the small size of the filter screen, the filter screen is attached Figure 3 Not shown in the figure, the filter is pressed against the rubber group holes 6 by a detachable pressure ring. When one group of rubber group holes 6 is located inside the sliding seat, the other group of rubber group holes 6 is located outside the sliding seat. The rear sliding seat 3 is provided with an inner sealing ring 7 that contacts the inner side of the orifice plate 5 to prevent the rubber from overflowing, and the front sliding seat 4 is provided with an outer sealing ring 8 that contacts the outer side of the orifice plate 5 to prevent the rubber from overflowing; the front sliding seat 4 is provided with a first adjusting bolt 9 that pushes the orifice plate 5 to make the orifice plate 5 close to the inner sealing ring 7, and the front sliding seat 4 is also provided with a second adjusting bolt 10 that pushes the outer sealing ring 8 to make the outer sealing ring 8 close to the orifice plate 5; the first adjusting bolts 9 are distributed on the front sliding seat 4 in two rows symmetrically with the horizontal plane where the horizontal center line of the inner sealing ring 7 is located as the symmetry plane, and the first adjusting bolts 9 in each row are arranged at intervals of two; the second adjusting bolts 10 are distributed on the front sliding seat 4 in a circle with the axial line of the outer sealing ring 8 as the axis.

[0027] A first oil filling hole 11 for filling lubricating oil to the sliding surface of the orifice plate 5 is provided on the axis of each first adjusting bolt 9 .

[0028] There is no washer 12 at the outer end of the outer sealing ring 8 , and the second adjusting bolt 10 pushes on the washer 12 , which is a metal ring.

[0029] The sliding seats at the upper and lower sides of the orifice plate 5 are provided with second oil filling holes 13 for filling lubricating oil into the upper and lower sides. When wear-resistant gaskets are arranged between the upper and lower sides of the orifice plate 5 and the sliding seats, the second oil filling holes 13 should pass through the gaskets.

[0030] When the present invention is used, the adjustment sequence is to first press the orifice plate 5 against the inner sealing ring 7 by the first adjusting bolt 9 , and then press the outer sealing ring 8 against the orifice plate 5 by the second adjusting bolt 10 .

[0031] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A quick screen-changing rubber filter, comprising a barrel (2) with a screw (1) therein, a sliding seat being provided at the mouth of the barrel (2), the sliding seat comprising a rear sliding seat (3) and a front sliding seat (4), the rear sliding seat (3) being fixed to the barrel (2) or being integrally provided with the barrel (2), the front sliding seat (4) being fixed to the front of the rear sliding seat (3), the front sliding seat (4) and the rear sliding seat (3) clamping a hole plate (5) which can slide left and right, the hole plate (5) having two groups of rubber-passing holes (6) which correspond to the mouth of the barrel (2) after sliding left and right, the rear end surface of each group of rubber-passing holes (6) being provided with a filter screen for filtering the rubber material extruded by the screw (1), when one group of rubber-passing holes (6) is located inside the sliding seat, the other group of rubber-passing holes (6) is located outside the sliding seat, and the invention is characterized in that: The rear slide (3) is provided with an inner sealing ring (7) that contacts the inner side surface of the orifice plate (5) to prevent the rubber from overflowing, and the front slide (4) is provided with an outer sealing ring (8) that contacts the outer side surface of the orifice plate (5) to prevent the rubber from overflowing; the front slide (4) is provided with a first adjusting bolt (9) that pushes the orifice plate (5) so that the orifice plate (5) and the inner sealing ring (7) are tightly attached, and the front slide (4) is also provided with a second adjusting bolt (10) that pushes the outer sealing ring (8) so that the outer sealing ring (8) and the orifice plate (5) are tightly attached. The first adjusting bolts (9) are distributed on the front slide seat (4) in two rows symmetrically distributed with the horizontal plane where the horizontal center line of the inner sealing ring (7) is located as the symmetry plane, and at least two first adjusting bolts (9) are arranged at intervals in each row; The second adjusting bolts (10) are distributed on the front slide seat (4) in a circular manner with the axis of the outer sealing ring (8) as the axis. When sealing is required, the orifice plate (5) is first pressed against the inner sealing ring (7) by the first adjusting bolt (9), and then the outer sealing ring (8) is pressed against the orifice plate (5) by the second adjusting bolt (10).

2. The rapid screen changing rubber filter according to claim 1, characterized in that: The first adjusting bolt (9) is provided with a first oil filling hole (11) for filling lubricating oil to the sliding surface of the orifice plate (5).

3. The rapid screen changing rubber filter according to claim 1, characterized in that: A washer (12) is further provided at the outer end of the outer sealing ring (8), and the second adjusting bolt (10) is pushed onto the washer (12).

4. The rapid screen changing rubber filter according to claim 1, characterized in that: Second oil filling holes (13) for filling lubricating oil into the upper and lower sides of the orifice plate (5) are provided on the sliding seats at the upper and lower sides.

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