Preparation process of high-temperature-resistant VMQ three-way integrated pipe of engine

Abstract

The invention discloses a preparation process of a high-temperature-resistant VMQ three-way integrated pipe of an engine, and belongs to the field of silicone rubber pipe production. The preparation process comprises the following steps: separately preparing a main body pipe mold core and a branch body pipe mold core; the main body pipe mold core comprises a main body pipe core rod; the main body pipe core rod is arranged according to the structure of a two-way pipeline; the branch pipe mold core is a hollow pipeline; a three-way pipe integrated forming mold is adopted as a carrier of a main pipe mold core and branch pipe mold cores, the three-way pipe integrated forming mold comprises an upper mold body and a lower mold body, the upper mold body and the lower mold body are each provided with a mold cavity, and one branch pipe mold core is installed at the bottom of each mold cavity in the lower mold body; the silica gel flows into the branch pipe mold core to form a branch pipe by means of the fluidity of the silica gel in a hot pressing environment, and the silica gel forms a main pipe on the main pipe core rod; and during mold stripping after vulcanization shaping, the upper mold and the lower mold are separated to eject the branch pipe, then the main body pipe is depored, the main body pipe and the branch pipe form the integrally-formed three-way pipe, and the three-way pipe is resistant to high temperature and high in mechanical strength.

Description

Technical Field

[0001] The invention belongs to the field of silicone rubber tube production and relates to a preparation process of a high-temperature resistant VMQ three-way integrated tube for an engine. Background Art

[0002] With the continuous advancement of engine technology, especially the trend of miniaturization of cylinder capacity and compact design, the internal space of the engine has become smaller and the temperature has become higher. As a component connecting multiple pipes, the sealing and stability performance of the three-way pipe is crucial.

[0003] The traditional three-way pipe processing technology is to splice independent main pipes and branch pipes. Its sealing performance and stability are not suitable for the complex environment inside the engine. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation process of a high-temperature resistant VMQ three-way integrated pipe for an engine, which solves the problem that the three-way pipe prepared by the splicing processing technology is not suitable for the complex internal environment of the engine.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A preparation process of a high temperature resistant VMQ three-way integrated pipe for an engine, comprising the following steps:

[0007] S1. Separately prepare a main tube mold core and a branch tube mold core; the main tube mold core includes a main tube core rod, and the main tube core rod is arranged according to the structure of a two-way pipe; the branch tube mold core is a hollow pipe;

[0008] S2, using a three-way pipe integrated molding die as a carrier of the main tube mold core and the branch tube mold core, the three-way pipe integrated molding die comprises an upper mold and a lower mold that match each other, both of which are provided with mold cavities that correspond to the main tube core rods one by one and match the shapes, and a branch tube mold core is installed at the bottom of each mold cavity in the lower mold, and the branch tube mold core is vertically fixed at the bottom of the mold cavity of the lower mold;

[0009] S3. Compression molding: Place a lower silicone rubber block in the mold cavity of the lower mold, then place the main tube mold core on the lower mold, and place all the main tube core rods of the main tube mold core in the mold cavity of the lower mold one by one. Then place an upper silicone rubber block on the main tube core rod, and finally press the upper mold and the lower mold tightly. Under the hot pressing environment, relying on the fluidity of silicone, silicone flows into the branch tube mold core to form a branch tube, and silicone forms a main tube on the main tube core rod; when demolding after vulcanization and finalization, the upper mold and the lower mold are separated to push out the branch tube, and then the main tube is removed from the core. The main tube and the branch tube form an integrated three-way pipe, which is a high-temperature resistant VMQ three-way integrated pipe for the engine.

[0010] Furthermore, the main tube mold core also includes a horizontally placed support column, and multiple main tube core rods are arranged on both sides of the support column, and all the main tube core rods located on the same side of the support column are evenly distributed along the axial direction of the support column; the upper mold and the lower mold are both provided with grooves matching the shape of the support column.

[0011] Furthermore, the number of the main tube core rods on both sides of the support column is equal and the main tube core rods on both sides are arranged opposite to each other.

[0012] Furthermore, the main tube core rod, the support column and the branch tube mold core are all made of high-temperature resistant stainless steel, and the main tube core rod and the support column are connected by welding.

[0013] Furthermore, the outer wall of the branch tube mold core is sealed and connected to the bottom of the mold cavity of the lower mold.

[0014] Furthermore, the upper and lower silicone rubber blocks are the same methyl vinyl silicone rubber blocks. The VMQ in the present invention is methyl vinyl silicone rubber, which has good high temperature resistance.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. A preparation process of a high temperature resistant VMQ three-way integrated tube for an engine relies on the good fluidity of silica gel, which automatically flows into the core of the branch tube of the lower mold during molding. When ejecting the mold, the upper and lower molds of the molding equipment are separated to eject the branch tube, and then the main tube is removed to achieve an integrated molded product. The mechanical strength of the connection between the main tube and the branch tube in the integrated three-way tube of the present invention is high, and it is not easy to tear. In addition, the integrated three-way tube of the present invention has good high temperature resistance and is suitable for the complex internal environment of the engine;

[0017] 2. The upper and lower silicone rubber blocks in the present invention are the same methyl vinyl silicone rubber blocks, which have good high temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a schematic diagram of the lower mold structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the upper mold structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the main tube mold core of the present invention;

[0022] Markings in the figure: 1-main tube mold core, 2-branch tube mold core, 3-upper mold, 4-lower mold, 5-mold cavity, 6-groove, 11-support column, 12-main tube core rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0027] Example 1

[0028] like Figure 1-Figure 3 As shown, a preferred embodiment of the present invention provides a preparation process for a high temperature resistant VMQ three-way integrated pipe for an engine, comprising the following steps:

[0029] S1, separately preparing a main tube mold core 1 and a branch tube mold core 2; the main tube mold core 1 includes a main tube core rod 12, and the main tube core rod 12 is arranged according to the structure of a two-way pipe; the branch tube mold core 2 is a hollow pipe;

[0030] S2, using a three-way tube integrated molding mold as a carrier of the main tube mold core 1 and the branch tube mold core 2, the three-way tube integrated molding mold comprises an upper mold 3 and a lower mold 4 that match each other, the upper mold 3 and the lower mold 4 are both provided with a mold cavity 5 that corresponds to the main tube core rod 12 one by one and matches the shape, and a branch tube mold core 2 is installed at the bottom of each mold cavity 5 in the lower mold 4, and the branch tube mold core 2 is vertically fixed at the bottom of the mold cavity 5 of the lower mold 4;

[0031] S3, compression molding: place a lower silicone rubber block in the mold cavity 5 of the lower mold 4, then place the main tube mold core 1 on the lower mold 4, and all the main tube core rods 12 of the main tube mold core 1 are placed one by one in the mold cavity 5 of the lower mold 4, then place an upper silicone rubber block on the main tube core rod 12, and finally press the upper mold 3 and the lower mold 4 tightly. Under the hot pressing environment, relying on the fluidity of silicone, silicone flows into the branch tube mold core 2 to form a branch tube, and silicone forms a main tube on the main tube core rod 12; when demolding after vulcanization and finalization, the upper mold 3 and the lower mold 4 are separated to push out the branch tube, and then the main tube is removed from the core, and the main tube and the branch tube form an integrally formed three-way pipe, which is a high-temperature resistant VMQ three-way integrated pipe for the engine.

[0032] The main tube mold core 1 also includes a horizontally placed support column 11, and multiple main tube core rods 12 are arranged on both sides of the support column 11. All the main tube core rods 12 located on the same side of the support column 11 are evenly distributed along the axial direction of the support column 11; the upper mold 3 and the lower mold 4 are both provided with a groove 6 matching the shape of the support column 11.

[0033] The number of the main tube core rods 12 on both sides of the support column 11 is equal and the main tube core rods 12 on both sides are arranged opposite to each other.

[0034] The main tube core rod 12, the support column 11 and the branch tube mold core 2 are all made of high-temperature resistant stainless steel, and the main tube core rod 12 and the support column 11 are connected by welding.

[0035] The outer wall of the branch tube mold core 2 is sealed and connected to the bottom of the mold cavity 5 of the lower mold 4 .

[0036] The upper and lower silicone rubber blocks and the lower silicone rubber blocks are the same methyl vinyl silicone rubber blocks.

[0037] The engine high-temperature resistant VMQ three-way integrated pipe prepared by the present invention can withstand high temperatures above 250°C, and the tensile strength of the connection between the main pipe and the branch pipe is greater than 20MPa, and is suitable for the high-temperature complex environment inside the engine.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A preparation process for a high temperature resistant VMQ three-way integrated pipe for an engine, characterized in that: The following steps are involved: S1. A main tube mold core (1) and a branch tube mold core (2) are prepared separately; the main tube mold core (1) comprises a main tube core rod (12), and the main tube core rod (12) is arranged according to the structure of a two-way pipe; the branch tube mold core (2) is a hollow pipe; S2. A three-way tube integrated molding die is used as a carrier of a main tube mold core (1) and a branch tube mold core (2), wherein the three-way tube integrated molding die comprises an upper mold (3) and a lower mold (4) that match each other, wherein both the upper mold (3) and the lower mold (4) are provided with a mold cavity (5) that corresponds one-to-one to the main tube core rod (12) and matches the shape, and a branch tube mold core (2) is installed at the bottom of each mold cavity (5) in the lower mold (4), and the branch tube mold core (2) is vertically fixed at the bottom of the mold cavity (5) of the lower mold (4); S3, compression molding: placing a lower silicone rubber block in the mold cavity (5) of the lower mold (4), then placing the main tube mold core (1) on the lower mold (4), and placing all the main tube core rods (12) of the main tube mold core (1) in the mold cavity (5) of the lower mold (4) one by one, then placing an upper silicone rubber block on the main tube core rod (12), and finally pressing the upper mold (3) and the lower mold (4) tightly. Under the hot pressing environment, relying on the fluidity of silicone, silicone flows into the branch tube mold core (2) to form a branch tube, and silicone forms the main tube on the main tube core rod (12); after vulcanization and finalization, when demolding, the upper mold (3) and the lower mold (4) are separated to eject the branch tube, and then the main tube is removed from the core, and the main tube and the branch tube form an integrally formed three-way tube, and the three-way tube is a high-temperature resistant VMQ three-way integrated tube for engines.

2. The process for preparing a high temperature resistant VMQ three-way integrated pipe for an engine according to claim 1, characterized in that: The main tube mold core (1) also includes a horizontally placed support column (11), and a plurality of main tube core rods (12) are arranged on both sides of the support column (11), and all the main tube core rods (12) located on the same side of the support column (11) are evenly distributed along the axial direction of the support column (11); and a groove (6) matching the shape of the support column (11) is provided on the upper mold (3) and the lower mold (4).

3. The process for preparing a high temperature resistant VMQ three-way integrated pipe for an engine according to claim 2, characterized in that: The number of the main tube core rods (12) on both sides of the support column (11) is equal, and the main tube core rods (12) on both sides are arranged opposite to each other.

4. The process for preparing a high temperature resistant VMQ three-way integrated pipe for an engine according to claim 2, characterized in that: The main tube core rod (12), the support column (11) and the branch tube mold core (2) are all made of high-temperature resistant stainless steel, and the main tube core rod (12) and the support column (11) are connected by welding.

5. The process for preparing a high temperature resistant VMQ three-way integrated pipe for an engine according to claim 1, characterized in that: The outer wall of the branch tube mold core (2) is sealedly connected to the bottom of the mold cavity (5) of the lower mold (4).

6. The process for preparing a high temperature resistant VMQ three-way integrated pipe for an engine according to claim 1, characterized in that: The upper and lower silicone rubber blocks and the lower silicone rubber blocks are the same methyl vinyl silicone rubber blocks.

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