An expansion joint processing and forming process

Abstract

This invention relates to the field of expansion joint manufacturing technology, and in particular to an expansion joint processing and molding process. The molding device and processing technology of this invention can be used to produce the above-mentioned expansion joint rubber tube. In the molding process of the expansion joint rubber tube, the middle part of the rubber tube is heated first, and then the expansion part of the molding block is used to realize the molding of the expansion joint rubber tube. This avoids the risk of structural breakage and crushing of the preform caused by direct extrusion of the preform by the die. At the same time, this invention has lower equipment requirements and a higher molding qualification rate.

Description

Technical Field

[0001] This invention relates to the field of expansion joint manufacturing technology, and in particular to an expansion joint processing and forming process. Background Technology

[0002] Expansion joints, as elastic compensation elements capable of free expansion and contraction, possess advantages such as reliable operation, good performance, and compact structure, and have been widely used in power, chemical, metallurgical, and urban construction fields. Commonly used expansion joint forming methods include hydraulic extrusion molding, which involves pressing preforms together using a die. However, this direct extrusion can easily cause structural fractures and damage to the preforms, preventing them from achieving the desired shape. Furthermore, it places high demands on equipment and results in a low yield rate.

[0003] An expansion joint is currently available, comprising a rubber head, an expansion joint rubber tube, a flange, a buffer connector, and a fixing component. The expansion joint rubber tube has openings through it, and several grooves are spaced apart on the left and right sides of the expansion joint rubber tube. Existing technology is not suitable for producing the above-mentioned expansion joint rubber tube. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a process for processing and forming expansion joints.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an expansion joint processing and molding process, the innovation of which is that: the expansion joint rubber tube is processed and molded by a molding device;

[0006] The molding device includes a bottom substrate, a middle molding component, and symmetrically arranged left and right molding components, and the left and right molding components are both installed on the top of the bottom substrate.

[0007] The left-side molding component includes an inner limiting plate and an outer limiting plate. The inner limiting plate is movably installed on the top of the substrate and includes an upper straight section, a middle arc section, and a lower straight section. A first receiving groove is formed between the bottom substrate and the inner limiting plates of the left and right molding components. The outer limiting plate is movably installed on the bottom substrate and located outside the inner limiting plate. A groove molding component is also provided on the outer limiting plate near the upper and lower straight sections. The groove molding component is used to pass through the inner limiting plate and extend into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates.

[0008] The middle forming part includes a lifting cylinder, a rotary motor and a forming block. The bottom output end of the cylinder is connected to the rotary motor, and the bottom output end of the rotary motor is connected to the forming block. The forming block includes an upper straight part, a middle supporting part and a lower straight part.

[0009] The inner limiting plate is also equipped with a heating device;

[0010] The process of processing a rubber tube into an expansion joint rubber tube using the above-mentioned molding device specifically includes the following steps:

[0011] S1. Move the two inner limiting plates toward each other on the bottom substrate until the upper and lower straight sections of the two inner limiting plates are completely attached. At this time, the first receiving groove is formed between the two inner limiting plates and the bottom substrate.

[0012] S2. Move the two outer limiting plates inward until their inner walls are in contact with the inner limiting plate. At this time, the groove forming part of the outer limiting plate passes through the inner limiting plate and extends into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates.

[0013] S3. Place the rubber tube vertically in the second receiving tank, and then use a heating device to heat the middle part of the rubber tube to a certain temperature.

[0014] S4. Use a lifting cylinder to drive the molding block down to the bottom of the molding block to fit the bottom substrate. Use a horizontal moving mechanism to move the molding block toward the inner wall of the rubber tube. Then start the rotary motor to drive the molding block to rotate, thereby using the middle supporting part to open the middle part of the inner wall of the rubber tube to form an arc groove. At this time, the expansion joint rubber tube is formed.

[0015] S5. Turn off the heating device to allow the expansion joint rubber tube to cool and set.

[0016] S5. Use the horizontal moving mechanism to move the molding block toward the middle of the expansion joint rubber tube, and use the lifting cylinder to move the molding block up until it is completely separated from the expansion joint rubber tube. Move the outer limit plate and the inner limit plate toward the outside one after the other, and take out the expansion joint rubber tube. The preparation of the expansion joint rubber tube is completed.

[0017] Furthermore, the horizontal moving mechanism is a horizontally positioned linear cylinder, the output end of which is connected to the lifting cylinder.

[0018] Furthermore, a through groove is horizontally formed on the upper and lower straight sections of the inner limiting plate, and the through groove includes a large annular groove and a small annular groove that are connected together. The large annular groove is located close to the outer limiting plate. The groove forming part includes a large annular block and a small annular block. The side of the large annular block that is close to the small annular block is completely placed in the large annular groove, and the extension side of the small annular block passes through the small annular block.

[0019] Furthermore, both the outer limiting plate and the inner limiting plate are provided with limiting blocks at their bottoms, and the bottom base plate is provided with corresponding limiting grooves.

[0020] The advantages of this invention are:

[0021] The molding apparatus and processing technology of the present invention can be used to produce the above-mentioned expansion joint rubber tube. In the molding process of the expansion joint rubber tube, the middle part of the rubber tube is heated first, and then the expansion part of the molding block is used to realize the molding of the expansion joint rubber tube. This avoids the risk of structural breakage and crushing of the preformed part caused by direct extrusion of the preformed part by the die. At the same time, the present invention has low requirements for equipment and a high molding qualification rate. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a cross-sectional view of the expansion joint rubber tube of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 3 This is an enlarged view of part of the structure of the present invention. Detailed Implementation

[0026] like Figures 1 to 3 The process for forming an expansion joint shown is as follows: the expansion joint rubber tube 1 has openings through it, and several arc-shaped grooves 2 are provided on the left and right sides of the expansion joint rubber tube 1 at intervals. For details of the specific structure, please refer to the patent: CN202122013280.8 A polymer material expansion joint.

[0027] The expansion joint rubber tube 1 is formed by a forming device;

[0028] The molding device includes a rectangular bottom substrate 3, a middle molding component, and symmetrically arranged left molding component 5 and right molding component 6, with the left and right molding components 6 both mounted on top of the bottom substrate 3.

[0029] The left molded part 5 includes an inner limiting plate 51 and an outer limiting plate 52. The inner limiting plate 51 is movably installed on the top of the bottom substrate 3 and includes an upper straight section, a middle arc section and a lower straight section. A first receiving groove is formed between the bottom substrate 3 and the inner limiting plates 51 of the left and right molded parts 6.

[0030] The outer limiting plate 52 is movably mounted on the bottom base plate 3 and located outside the inner limiting plate 51. The outer limiting plate 52 is also provided with a groove forming part 53 near the upper and lower straight sections. The groove forming part 53 is used to pass through the inner limiting plate 51 and extend into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates 51.

[0031] A through groove 5 is horizontally opened on the upper and lower straight sections of the inner limiting plate 51, and the through groove 5 includes a large annular groove and a small annular groove that are connected together, and the large annular groove is located close to the outer limiting plate 52.

[0032] The groove forming part 53 includes a large annular block 55 and a small annular block 56. The side of the large annular block 55 closest to the small annular block 56 is completely placed in the large annular groove. The extension side of the small annular block 56 passes through the small annular block 56 and is used to form the arc-shaped groove 2.

[0033] The middle molding part includes a lifting cylinder, a rotary motor, a molding block 4, and a horizontal moving mechanism. The bottom output end of the cylinder is connected to the rotary motor, and the bottom output end of the rotary motor passes through a horizontal support plate 7 and is connected to the molding block 4. The molding block 4 includes an upper straight part, a middle opening part, and a lower straight part. The middle molding part is set in the middle of the second receiving groove. The second receiving groove, the groove molding part 53, the rubber tube, the molding block 4, and the horizontal support plate 7 form an expansion joint rubber tube 1 molding cavity.

[0034] The horizontal movement mechanism is a horizontally positioned linear cylinder, the output of which is connected to the lifting cylinder.

[0035] Both the outer limiting plate 52 and the inner limiting plate 51 have limiting blocks at their bottoms, and the bottom base plate 3 has corresponding limiting grooves.

[0036] The inner limiting plate 51 is also equipped with a heating wire located in the middle arc section;

[0037] The process of processing a rubber tube into an expansion joint rubber tube 1 using the above-mentioned molding device specifically includes the following steps:

[0038] S1. Move the two inner limiting plates 51 toward each other on the bottom substrate 3 until the upper and lower straight sections of the two inner limiting plates 51 are completely attached. At this time, a first receiving groove is formed between the two inner limiting plates 51 and the bottom substrate 3.

[0039] S2. Move the two outer limiting plates 52 inward until their inner walls are in contact with the inner limiting plate 51. At this time, the groove forming part 53 of the outer limiting plate 52 passes through the inner limiting plate 51 and extends into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates 51.

[0040] S3. Place the rubber tube vertically in the second receiving tank, and then use a heating device to heat the middle part of the rubber tube to a certain temperature.

[0041] S. Use a lifting cylinder to drive the molding block 4 down to the bottom of the molding block 4 to fit the bottom substrate 3. Use a horizontal moving mechanism to move the molding block 4 toward the inner wall of the rubber tube. Then start the rotary motor to drive the molding block 4 to rotate, thereby using the middle supporting part to open the middle part of the inner wall of the rubber tube to form an arc groove. At this time, the expansion joint rubber tube 1 is formed.

[0042] S5. Turn off the heating device to allow the expansion joint rubber tube 1 to cool and set.

[0043] S5. Using the horizontal moving mechanism, move the molding block 4 toward the middle of the expansion joint rubber tube 1, and use the lifting cylinder to move the molding block 4 up until it is completely separated from the expansion joint rubber tube 1. Move the outer limiting plate 52 and the inner limiting plate 51 toward the outside one after the other, and take out the expansion joint rubber tube 1. The expansion joint rubber tube 1 is now prepared.

[0044] The molding apparatus and processing technology of the present invention can be used to produce the above-mentioned expansion joint rubber tube 1. In the molding process of the expansion joint rubber tube 1, the middle part of the rubber tube is heated first, and then the expansion part of the molding block 4 is used to realize the molding of the expansion joint rubber tube 1. This avoids the risk of structural breakage and crushing of the preform caused by direct extrusion of the preform by the die. At the same time, the present invention has low requirements for equipment and a high molding qualification rate.

[0045] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A process for processing and forming expansion joints, characterized in that: The expansion joint rubber hose is formed by a forming device; The molding device includes a bottom substrate, a middle molding component, and symmetrically arranged left and right molding components, and the left and right molding components are both installed on the top of the bottom substrate. The left-side molding component includes an inner limiting plate and an outer limiting plate. The inner limiting plate is movably installed on the top of the substrate and includes an upper straight section, a middle arc section, and a lower straight section. A first receiving groove is formed between the bottom substrate and the inner limiting plates of the left and right molding components. The outer limiting plate is movably installed on the bottom substrate and located outside the inner limiting plate. A groove molding component is also provided on the outer limiting plate near the upper and lower straight sections. The groove molding component is used to pass through the inner limiting plate and extend into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates. The middle forming part includes a lifting cylinder, a rotary motor and a forming block. The bottom output end of the cylinder is connected to the rotary motor, and the bottom output end of the rotary motor is connected to the forming block. The forming block includes an upper straight part, a middle supporting part and a lower straight part. The inner limiting plate is also equipped with a heating device; The process of processing a rubber tube into an expansion joint rubber tube using the above-mentioned molding device specifically includes the following steps: S1. Move the two inner limiting plates toward each other on the bottom substrate until the upper and lower straight sections of the two inner limiting plates are completely attached. At this time, the first receiving groove is formed between the two inner limiting plates and the bottom substrate. S2. Move the two outer limiting plates inward until their inner walls are in contact with the inner limiting plate. At this time, the groove forming part of the outer limiting plate passes through the inner limiting plate and extends into the first receiving groove. At this time, a second receiving groove is formed between the two inner limiting plates. S3. Place the rubber tube vertically in the second receiving tank, and then use a heating device to heat the middle part of the rubber tube to a certain temperature. S4. Use a lifting cylinder to drive the molding block down to the bottom of the molding block to fit the bottom substrate. Use a horizontal moving mechanism to move the molding block toward the inner wall of the rubber tube. Then start the rotary motor to drive the molding block to rotate, thereby using the middle supporting part to open the middle part of the inner wall of the rubber tube to form an arc groove. At this time, the expansion joint rubber tube is formed. S5. Turn off the heating device to allow the expansion joint rubber tube to cool and set. S5. Use the horizontal moving mechanism to move the molding block toward the middle of the expansion joint rubber tube, and use the lifting cylinder to move the molding block up until it is completely separated from the expansion joint rubber tube. Move the outer limit plate and the inner limit plate toward the outside one after the other, and take out the expansion joint rubber tube. The preparation of the expansion joint rubber tube is completed.

2. The expansion joint processing and forming process according to claim 1, characterized in that: The horizontal moving mechanism is a horizontally positioned linear cylinder, the output of which is connected to the lifting cylinder.

3. The expansion joint processing and forming process according to claim 1, characterized in that: The inner limiting plate has a horizontal through groove on its upper and lower straight sections. The through groove includes a large annular groove and a small annular groove that are connected together. The large annular groove is located close to the outer limiting plate. The groove forming part includes a large annular block and a small annular block. The side of the large annular block that is close to the small annular block is completely placed in the large annular groove, and the extension side of the small annular block passes through the small annular block.

4. The expansion joint processing and forming process according to claim 1, characterized in that: Both the outer limiting plate and the inner limiting plate are provided with limiting blocks at their bottoms, and the bottom base plate is provided with corresponding limiting grooves.

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