CN218053925U - Take overlap type thin wall rubber tube making devices - Google Patents

Abstract

The utility model discloses a take overlap type thin wall rubber tube making devices, including inserting subassembly, inner bag, be one end open-ended cavity in the subassembly of inserting, the inner wall of the subassembly of inserting with the outer wall of inner bag forms into the die cavity, the inner wall of the subassembly of inserting includes at least one exhaust ring, the outside of exhaust ring includes a plurality ofly and the exhaust groove of exhaust ring intercommunication. The utility model has the advantages that: the problem of insufficient exhaust area is solved, the problem of excessive extrusion of rubber materials is solved, the phenomenon of a large amount of bubbles is well solved, and the qualification rate of finished products is remarkably improved.

Description

Take overlap type thin wall rubber tube making devices

Technical Field

The utility model belongs to the technical field of a rubber preparation technique and specifically relates to a take overlap type thin wall rubber tube making devices.

Background

In the prior art, a thin-wall rubber tube is formed by inflating high-pressure gas into an inner bag to expand, tightly attaching a semi-finished product to a die cavity insert and baking at high temperature. And the semi-finished product is formed by wrapping a four-layer structure, and in the wrapping process, the phenomenon of hollowing and flatulence in the middle area of the semi-finished product due to untight wrapping is inevitable. In the vulcanization process of the special-shaped thin-wall rubber tube, due to the existence of the special-shaped areas, gas in the semi-finished product is difficult to remove in the areas in the inflation and fitting process, so that a series of defects such as bubbles and the like are usually generated in the special-shaped areas, and the product yield is low.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms part of the prior art that is already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in: how to solve the problem that a series of defects are caused because gas is difficult to discharge in the current thin-wall rubber tube forming process.

The utility model discloses a following technical means realizes solving above-mentioned technical problem:

the device for manufacturing the thin-wall rubber tube with the flash comprises an insert assembly and an inner bag, wherein a cavity with an opening at one end is formed in the insert assembly, a forming cavity is formed by the inner wall of the insert assembly and the outer wall of the inner bag, the inner wall of the insert assembly comprises at least one exhaust ring, and the outer side of the exhaust ring comprises a plurality of exhaust grooves communicated with the exhaust ring.

The utility model has the advantages that at least one exhaust ring is processed on the inner wall of the insert assembly, and a plurality of exhaust grooves communicated with the exhaust ring are formed on the outer side of the exhaust ring, when in use, a semi-finished product is arranged on the outer wall of the inner bag and positioned in the forming cavity, after gas is filled into the inner bag, the inner bag expands to tightly attach the semi-finished product to the inner wall of the insert assembly, and a finished product is finally formed through high-temperature baking; when the product is punched to be high and tightly pressed on the inner wall of the sticking block assembly, gas is discharged into the exhaust ring and the exhaust groove to be hidden, partial semi-finished rubber material is extruded into the area due to higher pressure, and after vulcanization, the product is taken out to form a finished product with exhaust groove flash and exhaust ring flash; when only setting up the air discharge ring, this regional air displacement is not enough again, if enlarge the air discharge ring simultaneously, will cause a large amount of sizing materials to extrude into this region and form and expose the line defect, the utility model provides an air discharge ring and air discharge duct's combination form has not only solved the regional not enough condition of air discharge, has also solved the sizing material simultaneously and has crowded too much situation into, and fine solution a large amount of bubbles's phenomenon is showing and has improved off-the-shelf qualification rate.

Preferably, the insert assembly comprises a plurality of insert bodies, and the insert bodies are sequentially overlapped to form a structure with a hollow end and a U-shaped section.

Preferably, one side of the bottom surface of one of the insert bodies, which is close to the forming cavity, is provided with a bevel or/and a notch, the side of the top surface of the adjacent insert body, which is close to the forming cavity, is provided with a bevel or/and a notch, and the bevel of the two insert bodies forms a vent ring and the notch forms a vent groove.

The utility model discloses directly polish out a breach and notch on the adjacent body of inserting, back two form exhaust ring and air discharge duct after inserting this body coupling, and processing is convenient.

Preferably, when the number of the exhaust rings is more than two, the exhaust rings are arranged along the height direction of the insert assembly, and the exhaust grooves are arrayed along the outer circumference of the exhaust rings.

The number of the exhaust rings can be adaptively designed according to the height of a product, the exhaust rings are preferably designed in the middle of the product and are uniformly arranged as much as possible, so that gas can be uniformly hidden in the exhaust rings and the exhaust grooves, and bubbles are reduced locally.

Preferably, the insert assembly includes a first insert, a second insert, a third insert and a fourth insert, the first insert is of a plate-shaped structure, the second insert, the third insert and the fourth insert are all of a cylindrical structure, the first insert is covered at one end of the second insert, and the second insert, the third insert and the fourth insert are sequentially connected.

Preferably, one side of the contact surface of the second insert and the third insert, which is close to the forming cavity, comprises a first exhaust ring, and one side of the contact surface of the third insert and the fourth insert, which is close to the forming cavity, comprises a second exhaust ring.

Preferably, the inner bag further comprises a first die and a second die, wherein the first die is connected with the top end of the insert assembly, the second die is connected with the bottom end of the insert assembly, and the second die is provided with an air inlet communicated with the inside of the inner bag.

Preferably, the inner bag fixing block is further included, one end of the inner bag fixing block is connected with the inner wall of the open end of the insert assembly, and one end of the inner bag fixing block is connected with the outside of the open end of the inner bag.

Preferably, the insert assembly further comprises a limiting cylinder, and the limiting cylinder is connected with the outer part of the insert assembly.

The utility model has the advantages of:

(1) The utility model has the advantages that at least one exhaust ring is processed on the inner wall of the insert assembly, and a plurality of exhaust grooves communicated with the exhaust ring are formed on the outer side of the exhaust ring, when in use, a semi-finished product is arranged on the outer wall of the inner bag and positioned in the forming cavity, after gas is injected into the inner bag, the inner bag expands to enable the semi-finished product to be tightly attached to the inner wall of the insert assembly, and a finished product is finally formed through high-temperature baking; when the product is punched to be high and tightly pressed on the inner wall of the sticking block assembly, gas is discharged into the exhaust ring and the exhaust groove to be hidden, partial semi-finished rubber material is extruded into the area due to higher pressure, and after vulcanization, the product is taken out to form a finished product with exhaust groove flash and exhaust ring flash; when only arranging the exhaust ring, the air displacement of the area is insufficient, and if the exhaust ring is expanded, a large amount of sizing materials can be squeezed into the area to form the defect of thread exposure;

(2) The utility model directly grinds a gap and a notch on the adjacent insert bodies, and the two latter insert bodies are connected to form an exhaust ring and an exhaust groove, thus the processing is convenient;

(3) The number of the exhaust rings can be adaptively designed according to the height of a product, the exhaust rings are preferably designed in the middle of the product and are uniformly arranged as much as possible, so that gas can be uniformly hidden in the exhaust rings and the exhaust grooves, and bubbles are reduced locally.

Drawings

FIG. 1 is a schematic structural diagram of a device for manufacturing a thin-walled rubber tube with flash according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of another embodiment of the present invention;

FIG. 4 is a schematic view of the exhaust groove flash and the exhaust ring flash in the finished product in an embodiment of the present invention;

fig. 5 is a cross-sectional view of a finished product in an embodiment of the invention;

reference numbers in the figures:

1. an insert assembly; 11. a first insert; 12. a second insert; 13. a third insert; 14. a fourth insert;

2. an inner bag; 3. an exhaust ring; 4. an exhaust duct; 5. a rubber tube; 6. a first mold; 7. a second mold; 8. an inner bag fixing block; 9. a limiting cylinder;

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, 2 and 3, the manufacturing device for the thin-walled rubber tube with the flash comprises an insert assembly 1 and an inner bag 2, wherein a cavity with an opening at the bottom end is formed inside the insert assembly 1, a forming cavity is formed by the inner wall of the insert assembly 1 and the outer wall of the inner bag 2, the inner wall of the insert assembly 1 comprises at least one exhaust ring 3, and the outer side of the exhaust ring 3 comprises a plurality of exhaust grooves 4 communicated with the exhaust ring 3.

Specifically, the insert assembly 1 comprises a plurality of insert bodies, and the insert bodies are sequentially overlapped to form a structure with a hollow bottom end and a U-shaped section.

In this embodiment, the insert assembly 1 includes four insert bodies, which are a first insert 11, a second insert 12, a third insert 13, and a fourth insert 14, respectively, where the first insert 11 is a plate-shaped structure, the second insert 12, the third insert 13, and the fourth insert 14 are all cylindrical structures, the first insert 11, the second insert 12, the third insert 13, and the fourth insert 14 are connected in sequence from top to bottom, where the first insert 11 is capped at a top end of the second insert 12 to seal a top of the entire insert assembly 1, and the second insert 12, the third insert 13, and the fourth insert 14 are designed in size and shape according to a shape of a product, and in this embodiment, a top of the product is small in size, a middle of the product is an inclined surface, and a bottom of the product is large in size, so that an inner diameter of the corresponding second insert 12 is minimum, a cavity is formed in the third insert 13, and an inner diameter of the fourth insert 14 is large, and an inner wall at a connection part of the three is in a smooth transition.

Formation of exhaust ring 3 and exhaust groove 4: the exhaust ring 3 and the exhaust groove 4 between the second insert 12 and the third insert 13 are taken as an example for explanation; one side of the bottom surface of the second insert 12, which is close to the molding cavity, is polished to form an inclined opening, one end of the inclined opening, which is close to a product, is larger, one side of the top surface of the third insert 13, which is close to the molding cavity, is polished to form an inclined opening, one end of the inclined opening, which is close to the product, is larger, and after the second insert 12 and the third insert 13 are connected, the inclined opening of the second insert 12 and the inclined opening of the third insert 13 form an annular exhaust ring 3; on the outer side of the bevel of the second insert 12, the outer side here refers to the side away from the molding cavity, and a plurality of notches are simultaneously ground, and the current situation of the notches can be rectangular; similarly, a plurality of notches are ground on the outer side of the inclined opening of the third insert 13, and after the second insert 12 is connected with the third insert 13, the notches of the second insert 12 correspond to the notches of the third insert 13 in position and are spliced up and down to form a plurality of exhaust grooves 4 in a circumferential array.

It should be noted that: the bevel and the notch on the second insert 12 and the third insert 13 can be ground simultaneously, or only the second insert 12 or the third insert 13 can be ground. The bevel and the notch on the second insert 12 and the third insert 13 may be vertically symmetrical, or the bevel and the notch on the second insert 12 may have a larger size, and the bevel and the notch on the third insert 13 may have a smaller size. Of course, the exhaust ring 3 and the exhaust groove 4 can also be directly ground on the inner wall of the second insert 12 or the third insert 13, but the top surface or the bottom surface of the second insert 12 or/and the third insert 13 is ground in the embodiment, so that the processing is easy.

Furthermore, as shown in fig. 2, the section position is located in the middle of the exhaust groove 4, and the exhaust groove 4 and the exhaust ring 3 adopt the same inclination angle, which is convenient for demoulding; the exhaust groove 4 may be a rectangular notch as shown in fig. 3; of course, the exhaust grooves 4 may have other shapes such as a semicircular shape and a triangular shape.

The inner bag 2 is positioned in the insert assembly 1, the bottom end of the inner bag is an open end, and the inner bag can be expanded after being filled with gas, so that the semi-finished product is propped and clings to the inner wall of the insert assembly 1.

In this embodiment, there are two exhaust rings 3, the two exhaust rings 3 are arranged along the height direction of the insert assembly 1, and the exhaust grooves 4 are arrayed along the outer circumference of the exhaust rings 3. The number of the exhaust rings 3 can be adaptively designed according to the height of a product, the design is preferably performed at the middle position of the product, and the exhaust rings 3 are uniformly distributed as much as possible, so that gas can be uniformly hidden in the exhaust rings 3 and the exhaust grooves 4, and bubbles are reduced locally.

As shown in fig. 1, in the present embodiment, a vent ring 3' is provided on a side of a contact surface between the second insert 12 and the third insert 13 close to the forming cavity, and a vent ring 3 ″ is provided on a side of a contact surface between the third insert 13 and the fourth insert 14 close to the forming cavity.

As shown in fig. 1-4, in the present embodiment, two air vent rings 3 are processed on the inner wall of the insert assembly 1, and a plurality of air vent grooves 4 communicated with the air vent rings 3 are formed on the outer side of the air vent rings 3, when in use, the semi-finished product is installed on the outer wall of the inner bag 2 in the molding cavity, after the air is injected into the inner bag 2, the inner bag 2 is expanded to tightly attach the rubber tube 5' of the semi-finished product to the inner wall of the insert assembly 1, and the finished product is finally formed after high temperature baking; when the product is pressed to the inner wall of the insert assembly 1, the gas is discharged into the exhaust ring 3 and the exhaust groove 4 to be hidden, and due to the larger pressure, partial semi-finished rubber material is extruded into the area, and after the vulcanization is finished, as shown in fig. 4 and 5, the molded product is taken out: the rubber tube 5 is formed with an exhaust groove burr 51 and an exhaust ring burr 52, and these excess burrs are cut out.

When only the exhaust ring 3 is arranged, the exhaust volume of the area is not enough, and meanwhile, if the exhaust ring 3 is enlarged, a large amount of sizing material is squeezed into the area to form a thread exposing defect; the embodiment provides a combination form of the exhaust ring 3 and the exhaust groove 4, the storage space of gas is increased in the special-shaped areas, so that bubbles are stored in the exhaust ring 3 and the exhaust groove 4, and the defects in the vulcanized finished product cannot exist on the product body; the problem of insufficient exhaust area is solved, the problem of excessive extrusion of rubber materials is solved, the phenomenon of a large amount of bubbles is well solved, and the qualification rate of finished products is remarkably improved.

Example two:

as shown in fig. 1, in this embodiment, on the basis of the first embodiment, the manufacturing apparatus for a thin-walled rubber tube with a flash edge further includes a first die 6 and a second die 7, the first die 6 is connected to the top end of the insert assembly 1, specifically, to the top ends of the first insert 11 and the second insert 12, the second die 7 is connected to the bottom end of the insert assembly 1, specifically, the second die 7 is connected to the bottom of the fourth insert 14, the second die 7 has an air inlet 71, and the air inlet 71 is communicated with the inside of the inner bag 2.

This embodiment, a take overlap type thin wall rubber tube making devices still includes a plurality of inner bag fixed blocks 8, inner bag fixed block 8 can be an annular structure, and its outer end and fourth insert 14's inner wall connection, inner bag fixed block 8 the inner with the external connection of the open end of inner bag 2, the inner of inner bag fixed block 8 can be colluded the column structure, blocks inner bag 8, and the open end of inner bag 2 is fixed to inner bag fixed block 8 mainly used, makes it be unlikely to aerify the back and takes place the off tracking.

In this embodiment, a take overlap type thin-walled rubber tube making devices still includes a spacing section of thick bamboo 9, a spacing section of thick bamboo 9 is connected the outside of subassembly 1 of inserting to be connected with first mould 6, second mould 7 for fixed subassembly 1 of inserting, guarantee that its position is unchangeable.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The device for manufacturing the thin-wall rubber tube with the flash is characterized by comprising an insert assembly and an inner bag, wherein a cavity with an opening at one end is formed in the insert assembly, a forming cavity is formed by the inner wall of the insert assembly and the outer wall of the inner bag, the inner wall of the insert assembly comprises at least one exhaust ring, and the outer side of the exhaust ring comprises a plurality of exhaust grooves communicated with the exhaust ring.

2. The manufacturing device of the flash type thin-wall rubber tube according to claim 1, wherein the insert assembly comprises a plurality of insert bodies, and the plurality of insert bodies are sequentially stacked to form a structure with a hollow end and a U-shaped cross section.

3. The manufacturing device of the thin-walled rubber tube with the flash as claimed in claim 2, wherein one side of the bottom surface of one of the insert bodies close to the forming cavity is provided with a bevel or/and a notch, the side of the top surface of the adjacent insert body close to the forming cavity is provided with a bevel or/and a notch, the bevel of the two insert bodies forms a vent ring, and the notch forms a vent groove.

4. The manufacturing device for the thin-walled rubber tube with the flash according to claim 1, wherein when the number of the exhaust rings is two or more, the two or more exhaust rings are arranged along the height direction of the insert assembly, and the exhaust grooves are arrayed along the outer circumference of the exhaust rings.

5. The manufacturing device for the thin-wall rubber tube with the flash edge of claim 1, wherein the insert assembly comprises a first insert, a second insert, a third insert and a fourth insert, the first insert is of a plate-shaped structure, the second insert, the third insert and the fourth insert are all of a cylindrical structure, the first insert is connected to one end of the second insert in a covering mode, and the second insert, the third insert and the fourth insert are sequentially connected.

6. The manufacturing device for the thin-wall rubber tube with the flash as claimed in claim 5, wherein one side of the contact surface of the second insert and the third insert close to the forming cavity comprises a first exhaust ring, and one side of the contact surface of the third insert and the fourth insert close to the forming cavity comprises a second exhaust ring.

7. The manufacturing device of the thin-walled rubber tube with the flash as claimed in claim 1, further comprising a first die and a second die, wherein the first die is connected to the top end of the insert assembly, the second die is connected to the bottom end of the insert assembly, and the second die has an air inlet which is communicated with the interior of the inner bag.

8. The manufacturing device of the thin-walled rubber tube with the flash as claimed in claim 1, further comprising an inner bag fixing block, wherein one end of the inner bag fixing block is connected with the inner wall of the open end of the insert assembly, and one end of the inner bag fixing block is connected with the outside of the open end of the inner bag.

9. The manufacturing device of the thin-walled rubber tube with the flash as claimed in claim 1, further comprising a limiting cylinder, wherein the limiting cylinder is connected with the outside of the insert assembly.

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