A sample making die and method for a steel wire rope conveyor belt

Abstract

The present invention discloses a sample making mold and a making method for a steel wire rope conveyor belt, which relates to the technical field of steel wire rope conveyor belt detection, solves the problems of poor universality and poor production quality of the existing steel wire rope conveyor belt making mold, reduces the cost, and the specific scheme is as follows: It includes a chuck, a stop block, an upper mold and a lower mold that are detachably connected by bolts. The lower mold is a plate-like structure. A mold cavity penetrating the upper mold is opened at the middle position of the upper mold. Grooves communicating with the mold cavity are provided at both ends of the upper mold. The chucks are relatively inserted into the mold cavity along the length direction of the upper mold and are located at both ends of the mold cavity. The stop blocks are relatively inserted into the mold cavity along the width direction of the upper mold. The stop blocks are located between the two chucks to be used for changing the size of the mold cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of steel wire rope conveyor belt detection, and particularly to a steel wire rope conveyor belt specimen manufacturing mold and a manufacturing method thereof. Background Art

[0002] For a steel wire rope core flame-retardant conveyor belt used in coal mines, the rubber permeability is measured by applying a pressure difference of 100 kPa at both ends of a cut conveyor belt specimen, and the numerical change of the pressure difference within 60 s can be measured to represent the penetration and filling of rubber components in the steel wire rope core.

[0003] The inventor found that most of the existing steel wire rope conveyor belt specimen manufacturing molds are provided with a plurality of grooves at intervals along the width direction of the mold for placing steel wires in the grooves for positioning. However, due to the limitations of the groove size and the mold cavity depth, the universality of the mold is poor, and it can only adapt to a steel wire rope of a fixed size (it can also be understood that it can only manufacture a steel wire rope conveyor belt with a fixed structure); correspondingly, in the existing manufacturing methods, only one mold can be used to prepare specimens of one specification, and the distance between adjacent steel wires is extremely likely to change during the manufacturing process, and it cannot ensure that the rubber fully fills the mold cavity, thus unable to ensure the manufacturing quality of the specimens and affecting the subsequent test results. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a steel wire rope conveyor belt specimen manufacturing mold and a manufacturing method thereof. The mold cavity is set as a structure penetrating the upper mold, the lower mold is a plate-like structure, and the upper mold and the lower mold are detachably connected, which greatly improves the universality of the mold. The setting of the clamping head and the stop block can be replaced according to requirements, and it can adapt to the production requirements of different specifications of products, solving the problems of poor universality and poor manufacturing quality of the existing steel wire rope conveyor belt manufacturing molds.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In a first aspect, the present invention provides a steel wire rope conveyor belt specimen manufacturing mold, including a clamping head, a stop block, an upper mold and a lower mold detachably connected by bolts. The lower mold is a plate-like structure, a mold cavity penetrating the upper mold is provided at the middle position of the upper mold, grooves communicating with the mold cavity are provided at both ends of the upper mold, the clamping head is relatively inserted into the mold cavity along the length direction of the upper mold and is located at both ends of the mold cavity, and the stop block is relatively inserted into the mold cavity along the width direction of the upper mold. The stop block is located between the two clamping heads to change the size of the mold cavity.

[0007] As a further implementation manner, the grooves are coaxially arranged with the mold cavity, the width and depth of the grooves are both smaller than those of the mold cavity, and the grooves penetrate the side wall of the upper mold.

[0008] As a further implementation method, the length of the chuck is the same as the width of the cavity, the height of the chuck is the same as the depth of the cavity, a number of limiting holes are provided at intervals along the length direction of the chuck, and the chuck contacts the end of the stop block.

[0009] As a further implementation method, the chuck is formed by docking a first chuck unit and a second chuck unit, and a number of semi-circular grooves are provided at intervals along the length direction on the lower surface of the first chuck unit and the upper surface of the second chuck unit.

[0010] As a further implementation method, the chuck and the cavity are in contact through an arc transition structure.

[0011] In a second aspect, the present invention provides a method for manufacturing a steel wire rope conveyor belt specimen, which is specifically as follows:

[0012] Prepare a steel wire rope sample;

[0013] Select a chuck, an upper mold, and a lower mold;

[0014] Select rubber compound and knead it into a rubber sheet;

[0015] Assemble the mold and spray a release agent;

[0016] Lay the rubber sheet and the steel wire rope sample;

[0017] Vulcanize the specimen;

[0018] Demold the sample;

[0019] Cut the specimen.

[0020] As a further implementation method, the specific steps of laying the rubber sheet and the steel wire rope sample are as follows:

[0021] First, place the second chuck unit at both ends inside the cavity and install the stop block. Stack 2 - 3 layers of the first rubber sheet together and put them into the cavity, so that the upper surface of the first rubber sheet is flush with the bottom of the semi-circular groove of the second chuck unit;

[0022] Put the steel wire rope sample into the semi-circular groove of the second chuck unit. After the placement of the steel wire rope sample is completed, install the first chuck unit;

[0023] Fill the gaps between adjacent steel wire rope samples with rubber strips, and then put 5 - 6 layers of the second rubber sheet into the cavity, so that the contact surface of the second rubber sheet with the roll of the open mill is in contact with the steel wire rope;

[0024] Lay the glassine paper on the surface of the second rubber sheet.

[0025] As a further implementation method, when placing the second rubber sheet, make 2 - 3 layers of the second rubber sheet higher than the upper surface of the upper mold.

[0026] As a further implementation method, during the sample vulcanization step, the loaded mold should be placed at the middle position of the vulcanization plate.

[0027] As a further implementation method, when demolding the sample, the wire rope conveyor belt sample and the chuck as a whole are lifted upward from the mold cavity, and then the chuck is separated from the wire rope conveyor belt sample.

[0028] The beneficial effects of the present invention are as follows:

[0029] (1) In the present invention, the mold cavity is set to a structure that penetrates the upper mold, the lower mold is a plate-like structure, and the detachable connection method between the upper mold and the lower mold, as well as the insertion methods of the chuck and the stopper, enable the replacement of the upper mold, the chuck, and the stopper according to requirements, greatly improving the versatility of the mold, adapting to the production requirements of different specifications of products, and reducing the test cost.

[0030] (2) The setting of the stopper in the present invention can change the width of the mold cavity according to requirements to reduce the usage amount of rubber compound and wire ropes. When the thickness of the conveyor belt to be manufactured, the wire rope spacing, and the wire rope diameter remain unchanged, and only the width of the conveyor belt is changed, it is not necessary to replace the upper mold, and only the stopper needs to be inserted to achieve this, greatly reducing the usage cost.

[0031] (3) In the present invention, the chuck and the mold cavity are in contact through an arc transition structure, which not only facilitates the installation and positioning of the chuck in the mold cavity but also facilitates the removal of the chuck from the mold cavity after the conveyor belt is vulcanized.

[0032] (4) In the present invention, rubber strips are filled in the gaps between adjacent wire rope samples to ensure that the gaps between the wire rope samples are filled with rubber compound, so that the wire rope samples will not move horizontally in the rubber compound during pressurization, greatly ensuring the fixation of the positions of the wire rope samples.

[0033] (5) In the present invention, when placing the second rubber sheet, 2 to 3 layers of the second rubber sheet are higher than the upper surface of the upper mold to ensure that the rubber fully fills the mold cavity during vulcanization and avoid gaps between the rubber sheets or between the rubber sheets and the wire ropes. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0035] Figure 1 is an overall structural schematic diagram of a wire rope conveyor belt sample manufacturing mold according to one or more embodiments of the present invention;

[0036] Figure 2 is a top view structural schematic diagram of a wire rope conveyor belt sample manufacturing mold according to one or more embodiments of the present invention;

[0037] Figure 3 This is a schematic side view structure diagram of a wire rope conveyor belt specimen manufacturing mold according to one or more embodiments of the present invention;

[0038] In the figure: The distances or sizes between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration;

[0039] Among them, 1. upper mold; 2. lower mold; 3. stopper; 4. first chuck unit; 5. second chuck unit; 6. bolt hole; 7. limit hole; 8. mold cavity; 9. groove. Detailed implementation manners

[0040] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0041] As introduced in the background technology, the existing wire rope conveyor belt specimen manufacturing molds are limited by the groove size and the depth of the mold cavity, resulting in poor versatility of the molds and only being able to adapt to a wire rope of a fixed size; in the existing manufacturing methods, the manufacturing quality of the specimens cannot be guaranteed, affecting the subsequent test results. To solve the above technical problems, the present invention proposes a wire rope conveyor belt specimen manufacturing mold and a manufacturing method.

[0042] Embodiment 1

[0043] In a typical embodiment of the present invention, as Figures 1 - 3 shown, a wire rope conveyor belt specimen manufacturing mold is proposed, including an upper mold 1, a lower mold 2, chucks and a stopper 3. Among them, the upper mold 1 and the lower mold 2 are detachably connected by bolts; there are two chucks, and the two chucks are relatively inserted into the mold cavity 8 of the upper mold 1 along the length direction of the upper mold 1 and are located at both ends of the mold cavity 8 for clamping the wire rope, thereby restricting the relative positions between the wire ropes; there are two stoppers 3, and the two stoppers 3 are relatively inserted into the mold cavity 8 along the width direction of the upper mold 1, and the stopper 3 is located between the two chucks, mainly for occupying the space in the mold cavity 8 to change the width of the mold cavity 8, and thus the use of rubber material can be reduced according to requirements.

[0044] Specifically, the lower mold 2 is a plate-like structure, and the lower mold 2 serves as a bottom plate for covering the bottom of the mold cavity 8 in the upper mold 1.

[0045] The middle position of the upper mold 1 is a mold cavity 8 penetrating the upper mold 1. The bottom of the mold cavity 8 is covered by the lower mold 2. A number of bolt holes 6 are provided on the upper mold 1, and bolt holes 6 are also provided at the corresponding positions on the lower mold 2 to detachably connect the upper mold 1 and the lower mold 2 by means of bolts.

[0046] The cavity 8 of the upper mold 1 is a structure with openings at both the upper and lower ends, the lower mold 2 is a plate-like structure, and the detachable connection method between the upper mold 1 and the lower mold 2 greatly improves the versatility of the mold. In actual applications, the upper mold 1 with different thicknesses can be replaced according to requirements, thereby changing the depth of the cavity 8 to facilitate the production of conveyor belts with different thicknesses.

[0047] At both ends of the upper mold 1, there are also grooves 9. The grooves 9 communicate with the cavity 8. The width of the grooves 9 is smaller than the width of the cavity 8, and the depth of the grooves 9 is smaller than that of the cavity 8. The top of the grooves 9 is flush with the upper surface of the upper mold 1. The grooves 9 penetrate the side wall of the upper mold 1, and the grooves 9 are coaxially arranged with the cavity 8, mainly used for the steel wire ropes to extend out of the mold from both ends of the cavity 8, so as to facilitate the use of the tensioning system to tension the steel wire ropes in the mold.

[0048] The length of the chuck is the same as the width of the cavity 8, and the height of the chuck is the same as the depth of the cavity 8. When the chuck is inserted at both ends of the cavity 8, the cavity 8 can be separated from the groove 9 by using the chuck. At the same time, the upper surface of the chuck is flush with the upper surface of the upper mold 1. Along the length direction of the chuck, a number of limiting holes 7 for clamping the steel wire ropes are arranged at intervals.

[0049] The chuck is composed of a first chuck unit 4 and a second chuck unit 5. The first chuck unit 4 and the second chuck unit 5 are butt-joined and assembled to form the chuck. Along the length direction, a number of semi-circular grooves are arranged at intervals on the lower surface of the first chuck unit 4 and the upper surface of the second chuck unit 5, and the semi-circular grooves 9 on the first chuck unit 4 and the stacked chuck unit 5 correspond to each other one by one to form the limiting holes 7.

[0050] Since the chuck is inserted into the cavity 8, different chucks can be replaced according to requirements to change the diameter of the limiting holes 7 and the distance between adjacent limiting holes 7, thereby improving the adaptability of the mold to the steel wire ropes.

[0051] The chuck and the cavity 8 are in contact through an arc transition structure, that is, the corners where the chuck contacts the cavity 8 and the corners of the cavity 8 are both arc transition structures, which not only facilitates the installation and positioning of the chuck in the cavity 8, but also facilitates the removal of the chuck from the cavity 8 after the conveyor belt is vulcanized.

[0052] The stop block 3 is a long strip-like structure. The length of the stop block 3 is the same as the distance between the two chucks in the cavity 8. After being installed in place, both ends of the stop block 3 are in contact with the adjacent chucks respectively. The setting of the two stop blocks 3 in the cavity 8 can change the width of the cavity 8 according to requirements to reduce the usage amount of rubber material and steel wire ropes. When the thickness, steel wire rope spacing, and steel wire rope diameter of the conveyor belt to be produced remain unchanged and only the width of the conveyor belt is changed, there is no need to replace the upper mold 1, and only the stop block 3 needs to be installed to achieve this, which greatly reduces the cost.

[0053] It is understandable that the size of the stopper 3 has various options and can be selected according to actual needs. Specific sizes are not restricted here too much.

[0054] Embodiment 2

[0055] In another typical implementation manner of the present invention, a method for manufacturing a steel wire rope conveyor belt specimen is proposed. The manufacturing mold in Embodiment 1 is utilized, and the specific process is as follows:

[0056] 1. Prepare steel wire rope samples

[0057] Intercept the steel wire rope to obtain 3 to 6 steel wire rope samples. The length of each steel wire rope is about 800 mm, and place them in a clean and dry place to prevent corrosion and oxidation.

[0058] Among them, the diameter of the steel wire rope is determined according to the design requirements. Specific details are not restricted here too much.

[0059] 2. Select the chuck, upper die, and lower die

[0060] Select the corresponding chuck according to the diameter of the intercepted steel wire rope sample, so that the diameter of the limiting hole 7 is of the specification of the diameter of the steel wire rope sample ±1.0 mm; determine the size of the mold cavity 8 according to the width, thickness, and length of the conveyor belt sample to be prepared, and select a suitable upper die 1 according to the determined size of the mold cavity 8, and correspondingly select a lower die 2 that matches the upper die 1.

[0061] 3. Select the rubber compound and refine it into a rubber sheet

[0062] Among them, select the middle rubber compound used for the flame-retardant belt and refine it into a rubber sheet. The rubber sheet is selected for testing within one week of production. The thickness of the rubber sheet refined by the open mill is 5.0 mm ±1.0 mm, and it is cut into a size that matches the remaining size in the mold cavity 8 after adding the chuck and the stopper 3.

[0063] It should be noted that if the refined rubber sheet is not used up on the same day, it needs to be covered with an isolation film for storage, and the storage time should not exceed 48 hours; and when using, it must be clearly marked the contact surface of the rubber compound with the roller of the open mill when the rubber sheet is taken off. This contact surface is used to contact the steel wire rope, and the calendering direction of the rubber sheet is the same as the placement direction of the steel wire rope.

[0064] 4. Assemble the mold and spray the release agent

[0065] Assemble the selected upper die 1 and lower die 2 together, and then use a release agent sprayer to evenly spray the release agent into the mold cavity 8. Note that not too much should be sprayed, so that the release agent is evenly applied on the inner wall of the mold cavity 8 and the upper surface of the lower die 2 located inside the mold cavity 8.

[0066] 5. Lay the rubber sheet and steel wire rope samples

[0067] 5.1. Before laying the film, first place the second chuck unit 5 at both ends inside the mold cavity 8, and install the stop block 3 as needed. Stack 2 - 3 layers of the first film together and place them in the mold cavity 8, making the upper surface of the first film flush with the bottom of the semi-circular groove of the second chuck unit 5 for placing the wire rope. In this way, the wire rope sample will not move due to lack of rubber at the lower part during vulcanization under pressure, and the height of each wire rope sample can be effectively controlled. The contact surface of the first film with the roll of the open mill faces upward to ensure that this surface contacts the wire rope sample;

[0068] 5.2. Place the wire rope sample into the semi-circular groove of the second chuck unit 5, with one wire rope sample placed in each semi-circular groove. After placing all the wire rope samples, install the first chuck unit 4 so that the first chuck unit 4 and the second chuck unit 5 are clamped together to form a circular limiting hole 7. This can fix the position of the wire rope and facilitate the filling of the rubber strip;

[0069] It should be noted that both ends of the wire rope sample should be tightened through a tensioning system to ensure the levelness of the wire rope.

[0070] 5.3. Fill the gaps between adjacent wire rope samples with rubber strips to ensure that all the gaps between the wire rope samples are filled with rubber material. In this way, the wire rope samples will not move horizontally in the rubber material during pressurization, greatly ensuring the fixation of the wire rope sample position;

[0071] 5.4. Then place 5 - 6 layers of the second film into the mold cavity 8, making the second film laid above the wire rope sample. The contact surface of the second film with the roll of the open mill faces downward to ensure that this contact surface contacts the wire rope;

[0072] It should be noted that 2 - 3 layers of the second film should be higher than the upper surface of the upper mold 1 to ensure that the rubber fully fills the mold cavity 8 during vulcanization and to avoid gaps between the films or between the film and the wire rope.

[0073] 5.5. Lay the glassine paper on the surface of the second film for isolation.

[0074] 6. Specimen Vulcanization

[0075] 6.1. Set the temperature, pressure, and time of the vulcanizer according to the corresponding rubber vulcanization conditions;

[0076] 6.2. After the vulcanization temperature reaches the specified temperature, place the loaded mold at the middle position of the vulcanization plate to ensure uniform pressure on the plate;

[0077] 6.3. Close the mold for vulcanization and start timing (note whether the upper mold is misaligned during mold closing. If it is misaligned, stop mold closing in time, adjust, and then close the mold for vulcanization again);

[0078] 6.4. After reaching the vulcanization time, open the mold and take out the mold.

[0079] 7. Sample demolding

[0080] After vulcanization, quickly take out the wire rope conveyor belt sample from the mold. The demolding time should be less than 10 minutes, and it should be parked at room temperature for 24 hours.

[0081] During demolding, directly lift the wire rope conveyor belt sample and the chuck as a whole upward from the mold cavity 8, then disassemble the connection between the first chuck unit 4 and the second chuck unit 5, or directly pull out the chuck from the end of the wire rope to achieve the connection between the chuck and the wire rope conveyor belt sample.

[0082] 8. Sample cutting

[0083] Cut the vulcanized wire rope conveyor belt sample into a standard size of 400 mm (length) × 85 mm (width) × 33.5 mm (height). The sample preparation is completed, and it is parked at room temperature for 16 hours waiting for the test.

[0084] The above manufacturing method can manufacture wire rope rubber permeability test samples of different specifications, meet the wire rope rubber permeability test detection, with less investment, stable performance, simple operation, high reliability, improve the experimental efficiency, and reduce the test cost.

[0085] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sample making mold for a steel wire rope conveyor belt, characterized in that, It includes a chuck, a stop block, an upper die and a lower die that are detachably connected by bolts. The lower die is a plate-like structure and serves as a bottom plate to cover the bottom of the inner cavity of the upper die. A cavity penetrating the upper die is provided at the middle position of the upper die. Grooves communicating with the cavity are provided at both ends of the upper die. The chuck is relatively inserted into the cavity along the length direction of the upper die and is located at both ends of the cavity. The stop block is relatively inserted into the cavity along the width direction of the upper die. The stop block is located between the two chucks to change the size of the cavity. The length of the chuck is the same as the width of the cavity, and the height of the chuck is the same as the depth of the cavity. A number of limiting holes are provided at intervals along the length direction on the chuck, and the end of the chuck contacts the stop block.

2. The sample-making mold for a steel wire rope conveyor belt according to claim 1, characterized in that, The groove is coaxially arranged with the cavity. The width and depth of the groove are both smaller than those of the cavity, and the groove penetrates the side wall of the upper die.

3. The sample making mold for a steel wire rope conveyor belt according to claim 1, characterized in that, The chuck is formed by docking a first chuck unit and a second chuck unit. A number of semi-circular grooves are provided at intervals along the length direction on the lower surface of the first chuck unit and the upper surface of the second chuck unit.

4. A production mold for a steel wire rope conveyor belt specimen according to claim 1, characterized in that, The chuck contacts the cavity through an arc transition structure.

5. A method for manufacturing a steel wire rope conveyor belt specimen, which utilizes a steel wire rope conveyor belt specimen manufacturing die as described in any one of claims 1-4, characterized in that, Specifically as follows: Prepare a wire rope sample; Select a chuck, an upper die and a lower die; Select rubber compound and refine it into a film; Assemble the mold and spray a release agent; Lay the film and the wire rope sample; Vulcanize the specimen; Demold the sample; Cut the specimen.

6. The manufacturing method of a steel wire rope conveyor belt specimen according to claim 5, characterized in that, The specific steps for laying the film and the wire rope sample are as follows: First, place the second chuck unit at both ends inside the cavity and install the stop block. Stack 2 - 3 layers of the first film together and place them in the cavity so that the upper surface of the first film is flush with the bottom of the semi-circular groove of the second chuck unit; Place the wire rope sample in the semi-circular groove of the second chuck unit. After the placement of the wire rope sample is completed, install the first chuck unit; Fill the gaps between adjacent wire rope samples with rubber strips, and then place 5 - 6 layers of the second film in the cavity so that the contact surface of the second film with the roll of the open mill contacts the wire rope; Lay the glassine paper on the surface of the second film.

7. The manufacturing method of a steel wire rope conveyor belt specimen according to claim 6, characterized in that, When placing the second film, make 2 - 3 layers of the second film higher than the upper surface of the upper die.

8. The manufacturing method of a steel wire rope conveyor belt specimen according to claim 5, characterized in that, In the step of vulcanizing the specimen, the loaded mold should be placed at the middle position of the vulcanizing plate.

9. The manufacturing method of a steel wire rope conveyor belt specimen according to claim 5, characterized in that, When demolding the sample, lift the wire rope conveyor belt specimen and the chuck as a whole upward from the cavity, and then separate the chuck from the wire rope conveyor belt specimen.

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