CN111169029B

CN111169029B - Equipment sealing element manufacturing device and method for field environment

Info

Publication number: CN111169029B
Application number: CN202010014797.6A
Authority: CN
Inventors: 张连重; 于月苹; 黄胜; 李涤尘; 张晓宇; 张连武
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2021-04-20
Anticipated expiration: 2040-01-07
Also published as: CN111169029A

Abstract

The invention discloses a device and a method for manufacturing an equipment sealing element for a field environment, wherein the device comprises the following steps: the device comprises a forming bottom plate, a pressing plate, a first screw, an FDM 3D printing head and a screw injection molding head; the forming surface of the forming bottom plate is provided with a plurality of mounting holes; the mounting hole is provided with a first screw; the pressing plate is arranged on the first screw and provided with a plurality of injection molding holes, and one side of the pressing plate facing the molding surface is provided with an injection molding exhaust groove; the FDM 3D printing head is used for printing and forming an outer ring and an inner ring of the sealing element on the forming surface of the forming bottom plate; the screw injection head is used for injecting rubber filler between the outer ring and the inner ring of the seal formed by printing to form the seal; the first screw is provided with a plurality of step surfaces for mounting the pressing plate; the melting point of the materials of the outer ring and the inner ring of the sealing element is higher than that of the rubber filler. The device and the method for manufacturing the sealing element of the equipment can quickly manufacture the sealing element under the outdoor environment condition and can improve the equipment guarantee efficiency.

Description

Equipment sealing element manufacturing device and method for field environment

Technical Field

The invention belongs to the technical field of additive manufacturing of high polymer materials, and particularly relates to a device and a method for manufacturing an equipment sealing element for a field environment.

Background

The field battlefield environment equipment maintenance time directly determines the recovery of the equipment fighting capacity, and the trend of war victory or defeat is influenced, so that the equipment maintenance time is shortened in wartime, and the problem is highly emphasized by all countries in the world. The components of the weapon equipment mainly comprise metal parts and non-metal parts; the nonmetal part is mainly made of high polymer materials, and most of the high polymer materials are rubber material gaskets and gaskets which play a sealing role.

The protection mode for the damage of the rubber gasket and the gasket under the field environment is generally replaced by a new mode, but the situations of 'useful not carrying', 'not carrying', and 'spare part aging' often occur, great influence is caused on the emergency protection of the equipment, and the recovery of the fighting capacity of the equipment is directly influenced. Specifically, the existing field equipment is repaired, a spare part replacing mode is basically adopted, a damaged or invalid sealing element is replaced by a carried spare part, the situation that the spare part cannot be carried and is not needed frequently occurs, if the spare part is carried completely, factors such as large types, large quantity and the like which are not beneficial to carrying can occur, meanwhile, the sealing element has the problem of service life and the like, the situation that the stored part is aged and cannot be used can occur easily, the situation has great influence on the field equipment guarantee, the performance of the equipment is related to each part of the equipment, the fighting capacity of the equipment is influenced, and even the trend of local wars can be influenced. Therefore, the rapid manufacturing of the rubber material gasket and the gasket in the field environment is very important.

Can adopt FDM to print technique to carry out rubber materials at present and print preparation packing ring and gasket, nevertheless FDM prints inefficiency, and only has the printing volume of 15 ~ 40 grams per hour, and because of the variation in size of gasket, gasket weight is also in tens to hundreds of grams, according to current FDM printing mode, and the gasket can't be makeed fast to open-air environment, and under the condition of time exactly being "fighter", can't satisfy the demand of the emergent team time of salvageing of equipment in open-air wartime.

In view of the above, there is a need for a new apparatus and method for making an equipment seal for field environments.

Disclosure of Invention

The invention aims to provide a device and a method for manufacturing an equipment sealing element for a field environment, which aim to solve the problem of emergency manufacturing of the equipment sealing element for the field environment. The device and the method for manufacturing the sealing element of the equipment can quickly manufacture the sealing element under the outdoor environment condition and can improve the equipment guarantee efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to a device for manufacturing an equipment sealing element for a field environment, which comprises: the device comprises a forming bottom plate, a pressing plate, a first screw, a second screw, an FDM 3D printing head and a screw injection molding head; one surface of the forming bottom plate is a forming surface, and the other surface of the forming bottom plate is provided with a cooling pipe; the forming surface of the forming bottom plate is provided with a plurality of mounting holes; the mounting hole is provided with a first screw, and the second screw is used for fixing the first screw on the forming bottom plate; the pressing plate is arranged on the first screw and provided with a plurality of injection molding holes, and one side of the pressing plate facing the molding surface is provided with an injection molding exhaust groove; the FDM 3D printing head is used for printing and forming an outer ring and an inner ring of the sealing element on the forming surface of the forming bottom plate; the screw injection head is used for injecting rubber filler between an outer ring and an inner ring of the seal formed by printing to form the seal; the first screw is provided with a plurality of step surfaces for mounting the pressing plate; the first screws are arranged in the mounting holes, and the distances between each step surface and the forming surface are different; the melting point of the materials of the outer ring and the inner ring of the sealing element is higher than that of the rubber filler.

The invention has the further improvement that four step surfaces are arranged around the top of each first screw, and the bottom of each first screw is provided with a locking groove.

The further improvement of the invention is that the first screw is arranged in the mounting hole, and the distances from the four step surfaces to the forming surface are respectively 0.5mm, 1mm, 1.5mm and 2 mm; or the first screw is installed in the installation hole, and the distances from the four step surfaces to the forming surface are respectively 2.5mm, 3mm, 3.5mm and 4 mm.

The invention has the further improvement that the injection molding holes are arranged in a straight shape; the diameter of the injection molding hole is 1-2 mm.

The injection molding exhaust groove is further improved in that the injection molding exhaust groove is a plurality of triangular grooves which are vertically arranged, the interval between every two adjacent triangular grooves is 5-10mm, and the depth of each triangular groove is 0.1-0.2 mm.

The invention is further improved in that the cooling pipes are arranged in a disc shape and used for introducing cooling water.

The invention is further improved in that the horizontal section of the forming bottom plate is rectangular; the number of the mounting holes is 4, and the mounting holes are arranged at four corners of the forming bottom plate.

The invention relates to a method for manufacturing an equipment sealing element for field environment, which is based on the device for manufacturing the equipment sealing element and specifically comprises the following steps:

step 1, adjusting a first screw according to the thickness of an equipment sealing element to be manufactured, and selecting a step surface of the first screw;

step 2, printing by an FDM 3D printing head on a forming surface of a forming bottom plate to form an outer ring and an inner ring of a sealing element;

step 3, arranging a pressing plate on the step surface of the first screw selected in the step 1;

step 3, injecting a rubber filler between the outer ring and the inner ring of the seal formed by printing through an injection hole by the screw injection head to form a seal;

and 4, introducing a cooling medium into the cooling pipe to finish the manufacture of the equipment sealing element.

Further, in the step 2, the wall thickness of the outer ring and the wall thickness of the inner ring of the sealing element are 0.5-4 mm.

Compared with the prior art, the invention has the following beneficial effects:

the device of the invention can rapidly manufacture the polymer sealing element in the field environment in wartime, realizes the purpose of manufacture at any time, is convenient and rapid, improves the equipment guarantee efficiency and provides technical support for the equipment robber. The invention combines FDM printing and polymer injection molding, can realize the printing of the sealing element on the field rapidly, can greatly shorten the field manufacturing time of the sealing element, has important military significance for solving the emergency guarantee problem of the sealing element of the weapon equipment in the field battlefield environment, and can provide equipment and technical support for the emergency guarantee of equipment in wartime.

The method combines FDM printing and polymer injection molding, can realize the printing of the sealing element in the field and can greatly shorten the field manufacturing time of the sealing element.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is an exploded view of a seal making apparatus for use in a field environment in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of a seal making apparatus for use in a field environment, according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating the fabrication of a gasket in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a screw structure according to an embodiment of the present invention;

in fig. 1 to 4, 1, a cooling pipe; 2. a first screw; 3. injection molding holes; 4. pressing a plate; 5. forming a bottom plate; 6. a second screw; 7. a gasket outer ring; 8. a gasket inner ring; 9. a rubber filler; 10 locking the groove; 11 a first step surface; 12 a second step surface; 13 a third step surface; 14 fourth step surface.

Detailed Description

In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following clearly and completely describes the technical solution of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention. Other embodiments, which can be derived by one of ordinary skill in the art from the disclosed embodiments without inventive faculty, are intended to be within the scope of the invention.

Referring to fig. 1 and 2, an apparatus for manufacturing a sealing member for a field environment according to an embodiment of the present invention includes: the device comprises a forming bottom plate 5, a pressing plate 4, first screws 2, second screws 6, an FDM 3D printing head and a screw injection head; wherein the forming bottom plate 5 is provided with cooling pipes 1 for cooling the forming bottom plate 5; the pressure plate 4 is provided with a plurality of injection molding holes 3.

Referring to fig. 1 and 3, when the gasket is manufactured in a field environment, the gasket outer ring 7 and the gasket inner ring 8 are printed by using a high-melting-point polymer material and an FDM mode, and the gasket is quickly manufactured by using a rubber material injected by using an injection molding mode.

Referring to fig. 1 and 4, specifically, the number of the first screws 2 is eight, and the first screws are divided into a first group and a second group, each group has four identical steps, each first screw has four steps around, and the first step surface 11, the second step surface 12, the third step surface 13 and the fourth step surface 14, and after the screws are inserted into the forming plate, the heights of the step surfaces higher than the forming base plate surface are different; a first group of first screws are embedded on the forming bottom plate, the first step is 0.5mm higher than the surface of the forming bottom plate, and the other three steps are 1mm, 1.5mm and 2mm higher than the forming surface in sequence; when the second group of first screws are embedded on the forming bottom plate, the heights from the lowest step to the highest step which are higher than the surface of the forming bottom plate are 2.5mm, 3mm, 3.5mm and 4mm in sequence; the first screw 2 is provided with a locking recess 10 at the lower part.

Referring to fig. 1 and 2, specifically, a row of injection molding holes 3 with a diameter of 1-2 mm is formed in a pressure plate 4, and triangular grooves which are arranged perpendicularly to each other are formed in one surface of the pressure plate 4 facing a forming bottom plate 5 and used for exhausting air during injection molding of a sealing element; the triangular grooves are spaced by 5-10mm and have a depth of 0.1-0.2 mm.

The invention relates to a method for manufacturing an equipment sealing element, which is based on the device, and has the core idea that the sealing element is quickly manufactured under the outdoor environment condition by adopting different material temperature differences (high-melting-point polymer material and low-melting-point polymer material, the high-melting-point polymer material printed by FDM serves as an outer ring (mold), the low-melting-point polymer in the inner part is injected and molded in an injection molding mode to fill the inner space, the shape and the precision of the outer ring (mold) are not changed when the low-melting-point polymer is injected and molded, and the successful composite manufacturing is ensured) and a composite method of FDM printing and plastic injection molding.

According to the method for manufacturing the equipment sealing element for the field environment, disclosed by the embodiment of the invention, when the sealing element is manufactured in an emergency in the field environment, the manufacturing step of the sealing element for the field environment is formulated according to the parameters of the sealing element, such as material, size, thickness and the like, and the method specifically comprises the following steps:

step 1, selecting an outer ring material according to the melting point temperature of a sealing element material and the temperature difference;

step 2, selecting a first screw 2 according to the thickness parameter of the gasket, selecting a first group of first screws 2 when the thickness of the sealing element is 0.5-2 mm, and selecting a second group of first screws 2 when the thickness of the sealing element is 2.5-4 mm;

step 3, according to the first screw 2 selected in the step 2, enabling the step surfaces (the thicknesses of the sealing elements) with the height required by the first screw 2 to correspond to each other inwards, and locking the first screw 2 by adopting a second screw 6 through a circular locking groove 10 at the lower part of the first screw 2;

step 4, adopting an FDM printing head on the forming bottom plate 5, and printing a material with a higher melting point to form a gasket inner ring 8 and a gasket outer ring 7 of the sealing element, wherein the height is the height of the sealing element, and the wall thickness is 0.5mm-4 mm;

step 5, placing the pressing plate 4 on the step surface selected by the first screw 2, and then pressing tightly;

step 6, judging injection molding holes 3 on a pressure plate 4 corresponding to the forming space of the sealing element, enabling injection molding heads to correspond to the injection molding holes 3, enabling a plurality of small holes to fall into the forming space area of the sealing element if a row of injection molding holes 3 are formed, leaving a small hole, plugging and unplugging nails to block redundant small holes, and injecting a molten rubber material into the forming space of the sealing element through the reserved unique injection molding holes 3 until the annotation is completed;

step 7, after the injection molding is finished, cooling water is introduced through the cooling pipe 1, and the temperature is rapidly reduced;

and 8, opening the pressure plate 4, taking out the injection molding sealing element, and removing the inner ring and the outer ring to obtain the required sealing element.

In summary, at present, a mainstream sealing element is generally produced by a manufacturer, but the sealing element has a certain service life, and failure shapes such as aging and damage are easy to occur in the use process, at present, a new sealing element is generally replaced to ensure the functional stability of the equipment, but because the uncertainty of the failure of the sealing element occurs sometimes when the sealing element is not carried and can not be carried, the performance of the equipment is ensured under the circumstance, the equipment can only be manufactured by adopting a field sealing element FDM printing mode, but at present, the FDM printing efficiency is extremely low, the printing efficiency of a miniaturized mainstream FDM printer is generally 15-40g/h, for the sealing element of the equipment, the gram to the hundred grams are different, therefore, when the ordinary FDM printing is adopted, the hour to the hour is different from half an hour to several hours, the emergency requirement under emergency conditions is difficult to meet, and a method combining the FDM and injection molding is adopted, the inner and outer rings of the sealing element are printed by adopting high-melting-point plastics through FDM, the filling part between the inner and outer rings is injection molded by adopting molten rubber, the manufacturing time of the sealing element under the field emergency condition can be greatly shortened, for example, about 100g of the sealing element is used, 10 minutes are spent on printing the inner and outer rings through FDM, 2 minutes are spent on filling the inner injection molding rubber, 6 minutes are spent on cooling and other operations, the manufacturing can be completed in 18 minutes in the field environment, 40g of the sealing element is printed by adopting FDM, 2.5 hours are spent on printing each hour, the composite manufacturing method is adopted, the time is spent within 20 minutes, compared with the method of singly adopting FDM for printing, the time can be shortened by more than 8 times, a gasket can be rapidly manufactured under the field environment condition, the emergency guarantee requirement of equipment can be met, and the important. The invention breaks through the conventional thought, creatively combines the FDM printing technology and the injection molding technology, can rapidly manufacture an urgent sealing element in the field battlefield environment, solves the emergency supply problem of the sealing element of the weapon equipment, can greatly shorten the equipment service fault discharge time caused by the damage or the failure of the sealing element in wartime, and shortens the equipment fighting capacity recovery time.

Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.

Claims

1. An apparatus for making a seal for a field environment, comprising: the device comprises a forming bottom plate (5), a pressing plate (4), a first screw (2), a second screw (6), an FDM 3D printing head and a screw injection molding head;

one surface of the forming bottom plate (5) is a forming surface, and the other surface is provided with a cooling pipe (1);

the forming surface of the forming bottom plate (5) is provided with a plurality of mounting holes; the mounting hole is provided with a first screw (2), and the second screw (6) is used for fixing the first screw (2) on the forming bottom plate (5); the pressing plate (4) is arranged on the first screw (2), the pressing plate (4) is provided with a plurality of injection molding holes (3), and one side, facing the molding surface, of the pressing plate (4) is provided with an injection molding exhaust groove;

the FDM 3D printing head is used for printing and forming an outer ring and an inner ring of a sealing element on a forming surface of a forming bottom plate (5);

the screw injection head is used for injecting rubber filler (9) between an outer ring and an inner ring of the seal formed by printing to form the seal;

the first screw (2) is provided with a plurality of step surfaces for mounting the pressing plate (4); the first screws (2) are arranged in the mounting holes, and the distances between each step surface and the forming surface are different;

the melting point of the materials of the outer ring and the inner ring of the sealing element is higher than that of the rubber filler (9);

four step surfaces are arranged around the top of each first screw (2), and a locking groove (10) is arranged at the bottom of each first screw; the first screws (2) are arranged in the mounting holes, and the distances from the four step surfaces to the forming surface are respectively 0.5mm, 1mm, 1.5mm and 2 mm;

or the first screw (2) is arranged in the mounting hole, and the distances from the four step surfaces to the forming surface are respectively 2.5mm, 3mm, 3.5mm and 4 mm;

the injection molding holes (3) are arranged in a straight shape; the diameter of the injection molding hole (3) is 1-2 mm;

the injection molding exhaust duct is composed of a plurality of triangular grooves which are vertically arranged, the interval between every two adjacent triangular grooves is 5-10mm, and the depth of each triangular groove is 0.1-0.2 mm.

2. The device for making equipment seals for field environments according to claim 1, characterized in that said cooling pipes (1) are arranged in a disc shape for passing cooling water.

3. An equipment seal making device for field environments according to claim 1, characterized by the fact that the horizontal section of the shaped bottom plate (5) is rectangular; the number of the mounting holes is 4, and the mounting holes are arranged at four corners of the forming bottom plate (5).

4. The equipment seal manufacturing method for the field environment is characterized by comprising the following steps of:

step 1, adjusting a first screw (2) according to the thickness of an equipment sealing element to be manufactured, and selecting a step surface of the first screw (2);

step 2, printing by an FDM 3D printing head on a forming surface of a forming bottom plate (5) to form an outer ring and an inner ring of a sealing element;

step 3, arranging a pressing plate (4) on the step surface of the first screw (2) selected in the step 1;

step 3, injecting rubber filler (9) between the outer ring and the inner ring of the seal formed by printing by the screw injection head through the injection hole (3) to form a seal;

and 4, introducing a cooling medium into the cooling pipe (1) to finish the manufacture of the equipment sealing element.