CN210061750U - Die for producing rotary rubber core - Google Patents
Die for producing rotary rubber core Download PDFInfo
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- CN210061750U CN210061750U CN201920567898.9U CN201920567898U CN210061750U CN 210061750 U CN210061750 U CN 210061750U CN 201920567898 U CN201920567898 U CN 201920567898U CN 210061750 U CN210061750 U CN 210061750U
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Abstract
The utility model discloses a mould for producing rotary rubber core, relating to the technical field of rubber products, which comprises a sealing end mould and an integral forming mould; the sealing end die comprises an upper die I, a middle die and a lower die, the upper die, the middle die and the lower die are sequentially installed from top to bottom, and the middle die is provided with a first annular groove matched with the sealing end of the rotary rubber core; the whole forming die includes a injecting glue section of thick bamboo, goes up mould two, supports end mould, well mould and lower mould, a injecting glue section of thick bamboo, last mould two, support end mould, well mould and lower mould are installed from last to down in proper order, support the end mould open have with rotatory gluey core support the annular two of end looks adaptation, annular one sets up with annular two coaxial lines, the utility model discloses the production has the sealed end that the wearability is strong and the rotatory gluey core of the support end that compactness is good, and production is quick, and the method is simple.
Description
Technical Field
The utility model belongs to the technical field of the rubber component, concretely relates to a mould for producing rotatory core of gluing.
Background
In the oil and gas well control sealing element, the rubber material product occupies a large proportion. The rotating rubber core is also called self-sealing rubber core because the inner diameter is smaller than the outer diameter of the drilling tool. In actual working conditions, the drilling tool is moved up and down, and the lower part of the rotary rubber core, namely the sealing end, is abraded. Therefore, the rubber material for the sealing surface needs to have oil resistance and also have high wear resistance.
In the rubber vulcanization process, a common rubber adding process is adopted, the process is safest, rubber is directly placed into a die cavity, and the rubber material starts to be vulcanized after die assembly, so that the mode is simple and convenient, time is saved, and the rubber material cannot be burnt. In the pressure injection process in the vulcanization process, the injection process is time-consuming (the thicker the product is, the more the glue material is, the more the time is consumed), and the glue material can flow only at a certain temperature, so the product is easy to scorch.
If the entire core is made of a very abrasion resistant rubber compound, two problems will exist:
the first problem is that for the safety of the process, only a glue adding method can be used, but the glue adding method can not ensure the uniformity of the glue of the whole product, and air holes can be formed at local positions.
The second problem is that: the rubber material with wear resistance has higher cost in the production of the rubber material, and the whole rotary rubber core is made of the rubber material with strong wear resistance, so that the production cost is increased.
In order to cope with such a situation, in combination with the actual use situation, it is necessary to use a rubber compound having high wear resistance at the sealed end portion and a rubber compound having a general tendency to flow at the supported end portion.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problem that the prior art lacks a mold suitable for producing a rotary rubber core with strong abrasion resistance at a sealing end and good compactness at a supporting end on the premise of safe process, the invention provides the mold for producing the rotary rubber core.
The utility model adopts the technical scheme as follows:
the rubber formula for the rotary rubber core comprises a formula of a rubber material A for a supporting end and a formula of a rubber material B for a sealing end, and the rubber formula comprises the following components in parts by weight:
the formula of the rubber material A comprises 95-105 parts of raw rubber; 45-55 parts of carbon black; 5-15 parts of white carbon black; 1-3 parts of a coupling agent; 0.5-1.5 parts of a dispersant; 10-16 parts of auxiliary additive; 3-9 parts of an accelerator;
the formula of the sizing material B is as follows: 95-105 parts of raw rubber; 55-65 parts of carbon black; 15-25 parts of white carbon black; 3-5 parts of a coupling agent; 1.5-2.5 parts of a dispersant; 10-16 parts of auxiliary additive; 3-9 parts of an accelerator.
Preferably, the rubber formula for the rotary rubber core comprises a formula of rubber A for a supporting end and a formula of rubber B for a sealing end, and the rubber formula comprises the following components in parts by weight:
the formula of the rubber material A comprises 100 parts of raw rubber; 50 parts of carbon black; 10 parts of white carbon black; 2 parts of a coupling agent; 1 part of a dispersant; 13 parts of auxiliary additive; 3 parts of an accelerant;
the formula of the sizing material B is as follows: 100 parts of raw rubber; 60 parts of carbon black; 20 parts of white carbon black; 4 parts of a coupling agent; 2 parts of a dispersing agent; 13 parts of auxiliary additive; and 3 parts of an accelerator.
Preferably, the auxiliary additive comprises the following components in parts by weight: 5 parts of zinc oxide; 1 part of stearic acid; 2 parts of an anti-aging agent; and 2 parts of paraffin.
Preferably, the accelerator comprises in parts by weight: 1 part of accelerator sulfur; 1 part of an accelerator TMTD; and 1 part of an accelerator DM.
Preferably, the ratio of the white carbon black to the coupling agent to the dispersing agent is 10:2: 1.
A method of making a rotary gum center comprising the steps of:
a. the rubber compound B for the sealed end and the rubber compound a for the support end were respectively refined using an internal mixer by the following method:
a primary smelting process: and (3) heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 80 ℃, and adding the thin and smooth raw rubber into the internal mixer for internal mixing for 60 seconds. Then adding carbon black, and banburying for 120 seconds; then adding the white carbon black, the coupling agent and the dispersing agent, and banburying for 120-150 seconds; finally, adding auxiliary additives, banburying for 60-90 seconds at the temperature of 100-120 ℃, discharging, thinly passing on an open mill for 5 times after discharging, standing for 24 hours, and finally refining;
and (3) final refining: heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 50 ℃, adding the master batch into the internal mixer, carrying out internal mixing for 120 seconds, adding the accelerator, carrying out internal mixing for 60 seconds, controlling the temperature within 70 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and vulcanizing;
b. pouring the rubber material B at the sealed end into a sealed end mould for shaping;
c. applying fifty tons of pressure by a press, and taking out the rubber body at the sealing end after 5 min;
d. heating a vulcanizing machine to 70 ℃, placing the rubber body at the sealing end into the bottom of an integral forming die, placing the rubber material A at the supporting end into a rubber injection cylinder, and starting pressure injection until the rubber material A at the supporting end is pressure injected into the supporting end die;
e. setting the temperature of a vulcanizing machine at 160 ℃ and the pressure of 200 tons, starting vulcanization for 3 hours, and then removing the integral forming die to obtain the finished product rotary rubber core.
A production mold comprises a sealing end mold and an integral forming mold;
the sealing end die comprises an upper die I, a middle die and a lower die, wherein the upper die I, the middle die and the lower die are sequentially installed from top to bottom, and the middle die is provided with a first annular groove matched with the sealing end of the rotary rubber core;
the integral forming die comprises a glue injection cylinder, a second upper die, a supporting end die, a middle die and a lower die, wherein the glue injection cylinder, the second upper die, the supporting end die, the middle die and the lower die are sequentially installed from top to bottom, the supporting end die is provided with a second annular groove matched with the rotary glue core in supporting end, and the first annular groove and the second annular groove are coaxially arranged.
Preferably, the first ring groove comprises a circular truncated cone-shaped groove with a large upper part and a small lower part, and a cylinder is arranged along the axis of the circular truncated cone-shaped groove.
Preferably, the annular groove II comprises a special-shaped groove with a cylindrical upper part and a big-end-up and small-end-down truncated cone lower part, and the special-shaped groove is provided with a central piece formed by coaxially stacking two big-end-up and small-end truncated cones along the axis.
Preferably, the upper die II is provided with a glue injection hole, and the glue injection hole corresponds to the ring groove II.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. in the utility model, by using the rubber formula related to the utility model, the rubber material A used for supporting the end and the rubber material B used for sealing the end are respectively produced, the rubber material B has excellent wear resistance, the rubber material A has excellent fluidity, when producing the rotary rubber core, the sealing end mould is firstly used to add the rubber material B by adopting the rubber adding process to form the sealing end, then the integral forming mould is used to add the rubber material A by adopting the rubber injecting process to form the supporting end, and the rotary rubber core is finally prepared after vulcanization; this scheme has excellent wearability and mobile sizing material B and sizing material A respectively through the use, produces sealed end and support end respectively, when satisfying sealed end and need use the material that the wearability is strong, has avoided the wholely use to add gluey technology, has guaranteed the compactness of product when guaranteeing the process security for support the end and can satisfy the operational environment of high strength, simultaneously, the utility model discloses only use the sizing material that the wearability is strong at sealed end, reduced the material cost of whole rotatory gluey core, have higher economic value.
2. In the utility model, the process of the rotary rubber core related to the utility model needs to use the production mold to manufacture, the traditional mold is not applicable to the process of the utility model, when the production mold is used for shaping the sealing end sizing material and the supporting end sizing material A, during the work, the sealing end mold is firstly used, the middle mold and the lower mold are installed, the sizing material B of the sealing end is filled with the first annular groove, even the sealing end sizing material B is filled with the space of the circular platform type groove except the cylinder, the first mold is installed, the sizing material B of the sealing end is formed, after the sizing material B of the sealing end is formed, the first mold is removed, the supporting end mold and the second mold and the rubber injection cylinder are installed, the sizing material A of the supporting end is arranged in the rubber injection cylinder, the sizing material A of the supporting end in the rubber injection cylinder is pressed by the press, the sizing material A of the supporting end flows into the second annular groove of, filling the space of the special-shaped groove except the central part with the supporting end rubber material, and removing the integral forming die after the supporting end rubber material A is formed to obtain a rotary rubber core; the production mold ensures the process safety, produces the rotary rubber core with the sealing end with strong wear resistance and the supporting end with good compactness, and has quick production and simple method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is the structure schematic diagram of the integral forming die of the utility model.
Fig. 2 is the structural schematic diagram of the sealing end mold of the present invention.
Fig. 3 is a schematic view of the rotary rubber core structure produced by the utility model.
The labels in the figure are: 1-first upper die, 2-middle die, 21-first ring groove, 22-cylinder, 3-lower die, 4-supporting end die, 41-second ring groove, 42-center piece, 5-second upper die, 51-glue injection hole, 6-glue injection barrel, 7-sealing end and 8-supporting end.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The utility model discloses the rubber formula for rotatory rubber core that preferred embodiment provided, including being used for supporting the sizing material A prescription of end 8 and being used for the sizing material B prescription of sealed end 7, each component is as follows according to the weight fraction:
the formula of the rubber material A comprises 100 parts of raw rubber; 50 parts of carbon black; 10 parts of white carbon black; 2 parts of a coupling agent; 1 part of a dispersant; 13 parts of auxiliary additive; accelerator 3 parts
The formula of the sizing material B is as follows: 100 parts of raw rubber; 60 parts of carbon black; 20 parts of white carbon black; 4 parts of a coupling agent; 2 parts of a dispersing agent; 13 parts of auxiliary additive; and 3 parts of an accelerator.
The auxiliary additive comprises the following components in parts by weight: 5 parts of zinc oxide; 1 part of stearic acid; 2 parts of an anti-aging agent; 2 parts of paraffin; and 3 parts of an accelerator.
The promoter comprises the following components in parts by weight: 1 part of accelerator sulfur; 1 part of an accelerator TMTD; and 1 part of an accelerator DM.
The ratio of the white carbon black to the coupling agent to the dispersing agent is 10:2: 1.
A method of making a rotary gum center comprising the steps of:
a. the compound B for the sealed end 7 and the compound a for the supported end 8 were each prepared using an internal mixer by the following method:
a primary smelting process: and (3) heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 80 ℃, and adding the thin and smooth raw rubber into the internal mixer for internal mixing for 60 seconds. Then adding carbon black, and banburying for 120 seconds; then adding the white carbon black, the coupling agent and the dispersing agent, and banburying for 120-150 seconds; finally, adding auxiliary additives, banburying for 60-90 seconds at the temperature of 100-120 ℃, discharging, thinly passing on an open mill for 5 times after discharging, standing for 24 hours, and finally refining;
and (3) final refining: heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 50 ℃, adding the master batch into the internal mixer, carrying out internal mixing for 120 seconds, adding the accelerator, carrying out internal mixing for 60 seconds, controlling the temperature within 70 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and vulcanizing;
b. pouring the rubber material B for the sealing end 7 into a sealing end mould for shaping;
c. applying fifty tons of pressure by a press, and taking out the rubber body at the sealing end 7 after 5 min;
d. heating the vulcanizing machine to 70 ℃, placing the rubber body at the sealing end 7 into the bottom of the integral forming die, placing the rubber material A at the supporting end 8 into the rubber injection cylinder 6, and starting pressure injection until the rubber material A at the supporting end 8 is pressure-injected into the die 4 at the supporting end 8;
e. setting the temperature of a vulcanizing machine at 160 ℃ and the pressure of 200 tons, starting vulcanization for 3 hours, and then removing the integral forming die to obtain the finished product rotary rubber core.
A production mold comprises a sealing end mold and an integral forming mold;
the sealing end die comprises an upper die 1, a middle die 2 and a lower die 3, the upper die, the middle die 2 and the lower die 3 are sequentially installed from top to bottom, and the middle die 2 is provided with a ring groove 21 matched with the sealing end 7 of the rotary rubber core;
the whole forming die includes a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3, a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3 from last to installing down in proper order, support end mould 4 to open have and support the annular two 41 of holding 8 looks adaptations with the rotatory core that glues, annular one 21 sets up with annular two 41 coaxial lines.
The first ring groove 21 comprises a circular truncated cone-shaped groove with a large upper part and a small lower part, and a cylinder 22 is arranged along the axis of the circular truncated cone-shaped groove.
The second ring groove 41 comprises a special-shaped groove with an upper part being a cylinder 22 type and a lower part being a big-end-up small-end-up circular truncated cone type, and the special-shaped groove is provided with a central piece 42 formed by coaxially stacking two big-end-up small-end-up circular truncated cones along the axis.
This scheme centre piece 42 is piled up by a big round platform and a small circle platform and forms, the top surface of big round platform is the bottom surface of small circle platform.
The upper die II 5 is provided with a glue injection hole 51, and the glue injection hole 51 corresponds to the ring groove II 41.
The working principle of the embodiment is as follows: when the scheme works, the glue applying process is as follows: thin-pass medium-high propylene nitrile crude rubber. The meaning is that: mooney of the raw rubber is reduced, the raw rubber and other materials are easier to mix in the rubber mixing process, and the raw rubber is easier to inject in the rubber injection process, namely the plasticity of the raw rubber is improved; the method comprises the following steps: cutting the whole raw rubber into small pieces on a rubber cutter, and putting the cut raw rubber into an open mill with cooling water for thin passing for 10 times. And standing for 24h after the sheet is removed, and then thinly passing the sheet for 10 times.
Rubber mixing process of the sealed end 7 rubber:
a primary smelting process: the internal mixer is heated to 30 ℃, and cooling water is started when the temperature of the internal mixer is set to 80 ℃. And (3) putting the thin and smooth raw rubber into an internal mixer, and carrying out internal mixing for 60 seconds. Then 60 parts of carbon black are added and banburying is carried out for 120 seconds; then 20 parts of white carbon black, 4 parts of coupling agent and 2 parts of dispersing agent are added, and banburying is carried out for 120-150 seconds; and finally, adding 13 parts of auxiliary additive, banburying for 60-90 seconds, controlling the temperature to be 100-120 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and finally milling.
And (3) final refining: the internal mixer is heated to 30 ℃, and cooling water is started when the temperature of the internal mixer is set to 50 ℃. And (4) putting the master batch into an internal mixer, and carrying out internal mixing for 120 seconds. Adding 3 parts of accelerator, banburying for 60 seconds, controlling the temperature within 70 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and vulcanizing.
The rubber mixing process of the rubber material at the supporting end 8 is the same as the rubber mixing process of the rubber material at the sealing end 7, and the difference is that the mass fractions of the added raw rubber, carbon black, white carbon black, coupling agent, dispersing agent, accelerating agent and auxiliary additive are different.
The rotary glue core comprises a supporting end 8 and a sealing end 7 which are vertically related, when a production mould is used for shaping a glue material B of the sealing end 7 and a glue material A of the supporting end 8, the sealing end mould is firstly used during working, a middle mould 2 and a lower mould 3 are installed, the glue material B of the sealing end 7 is filled, the glue material B of the sealing end 7 is made to fill a first ring groove 21, namely the glue material B of the sealing end 7 is made to fill the space of a circular truncated cone-shaped groove except a cylinder 22, an upper mould 1 is installed, the glue material B of the sealing end 7 is made to be shaped, after the glue material B of the sealing end 7 is made to be shaped, the upper mould 1 is removed, a supporting end mould 4, a second upper mould 5 and a glue injection cylinder 6 are installed, the glue material A of the supporting end 8 is placed in the glue injection cylinder 6, the glue material A of the supporting end 8 in the glue injection cylinder 6 is injected through a pressing machine, the glue material A of, namely, the glue material at the supporting end 8 is filled in the space of the special-shaped groove except the central part 42 until the glue material A at the supporting end 8 is formed, and then the integral forming die is removed to obtain the rotary glue core.
And (3) vulcanization process:
sizing of the glue material at the sealed end 7: the vulcanizing machine is not heated and is carried out at normal temperature. And putting the rubber material into a sealing end die, pressing for 5 minutes under the pressure of 50 tons, and taking out the rubber body at the sealing end 7.
Integral vulcanization:
and (3) heating the vulcanizing machine to 70 ℃, putting the rubber body at the sealing end 7 into an integral forming die, putting the rubber material at the supporting end 8 into the rubber injection cylinder 6, and starting pressure injection until the rubber material is pressure-injected into the supporting end die 4.
And (3) taking away the glue injection cylinder 6, setting the temperature of a vulcanizing machine to be 160 ℃, setting the pressure to be 200 tons, starting vulcanization for 3 hours, then removing the integral forming die to obtain a finished product rotary rubber core, and then removing the integral forming die to obtain the finished product rotary rubber core.
Example 2
The utility model discloses the rubber formula for rotatory rubber core that preferred embodiment provided, including being used for supporting the sizing material A prescription of end 8 and being used for the sizing material B prescription of sealed end 7, each component is as follows according to the weight fraction:
the formula of the rubber material A comprises 95 parts of raw rubber; 45 parts of carbon black; 5 parts of white carbon black; 1 part of a coupling agent; 0.5 part of a dispersant; 10 parts of auxiliary additive; 6 portions of accelerant
The formula of the sizing material B is as follows: 95 parts of raw rubber; 55 parts of carbon black; 15 parts of white carbon black; 3 parts of a coupling agent; 1.5 parts of a dispersing agent; 10 parts of auxiliary additive; 6 parts of an accelerator.
The auxiliary additive comprises the following components in parts by weight: 2 parts of zinc oxide; 1 part of stearic acid; 2 parts of an anti-aging agent; and 2 parts of paraffin.
The promoter comprises the following components in parts by weight: 2 parts of accelerator sulfur; 2 parts of an accelerator TMTD; and 2 parts of an accelerator DM.
The ratio of the white carbon black to the coupling agent to the dispersing agent is 10:2: 1.
A method of making a rotary gum center comprising the steps of:
a. the compound B for the sealed end 7 and the compound a for the supported end 8 were each prepared using an internal mixer by the following method:
a primary smelting process: and (3) heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 80 ℃, and adding the thin and smooth raw rubber into the internal mixer for internal mixing for 60 seconds. Then adding carbon black, and banburying for 120 seconds; then adding the white carbon black, the coupling agent and the dispersing agent, and banburying for 120-150 seconds; finally, adding auxiliary additives, banburying for 60-90 seconds at the temperature of 100-120 ℃, discharging, thinly passing on an open mill for 5 times after discharging, standing for 24 hours, and finally refining;
and (3) final refining: heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 50 ℃, adding the master batch into the internal mixer, carrying out internal mixing for 120 seconds, adding the accelerator, carrying out internal mixing for 60 seconds, controlling the temperature within 70 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and vulcanizing;
b. pouring the rubber material of the sealed end 7 into a sealed end mould for shaping;
c. applying fifty tons of pressure by a press, and taking out the rubber body at the sealing end 7 after 5 min;
d. heating the vulcanizing machine to 70 ℃, placing the rubber body at the sealing end 7 into the bottom of the integral forming die, placing the rubber material A at the supporting end 8 into the rubber injection cylinder 6, and starting pressure injection until the rubber material A at the supporting end 8 is pressure-injected into the die 4 at the supporting end 8;
e. setting the temperature of a vulcanizing machine at 160 ℃ and the pressure of 200 tons, starting vulcanization for 3 hours, and then removing the integral forming die to obtain the finished product rotary rubber core.
A production mold comprises a sealing end mold and an integral forming mold;
the sealing end die comprises an upper die 1, a middle die 2 and a lower die 3, the upper die, the middle die 2 and the lower die 3 are sequentially installed from top to bottom, and the middle die 2 is provided with a ring groove 21 matched with the sealing end 7 of the rotary rubber core;
the whole forming die includes a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3, a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3 from last to installing down in proper order, support end mould 4 to open have and support the annular two 41 of holding 8 looks adaptations with the rotatory core that glues, annular one 21 sets up with annular two 41 coaxial lines.
The first ring groove 21 comprises a circular truncated cone-shaped groove with a large upper part and a small lower part, and a cylinder 22 is arranged along the axis of the circular truncated cone-shaped groove.
The second ring groove 41 comprises a special-shaped groove with an upper part being a cylinder 22 type and a lower part being a big-end-up small-end-up circular truncated cone type, and the special-shaped groove is provided with a central piece 42 formed by coaxially stacking two big-end-up small-end-up circular truncated cones along the axis.
This scheme centre piece 42 is piled up by a big round platform and a small circle platform and forms, the top surface of big round platform is the bottom surface of small circle platform.
The upper die II 5 is provided with a glue injection hole 51, and the glue injection hole 51 corresponds to the ring groove II 41.
Example 3
The utility model discloses the rubber formula for rotatory rubber core that preferred embodiment provided, including being used for supporting the sizing material A prescription of end 8 and being used for the sizing material B prescription of sealed end 7, each component is as follows according to the weight fraction:
the formula of the rubber material A comprises 105 parts of raw rubber; 55 parts of carbon black; 15 parts of white carbon black; 3 parts of a coupling agent; 1.5 parts of a dispersing agent; 16 parts of auxiliary additive; 9 parts of an accelerator;
the formula of the sizing material B is as follows: 105 parts of raw rubber; 65 parts of carbon black; 25 parts of white carbon black; 5 parts of a coupling agent; 2.5 parts of a dispersing agent; 16 parts of auxiliary additive; 9 parts of an accelerator.
The auxiliary additive comprises the following components in parts by weight: 8 parts of zinc oxide; 1 part of stearic acid; 2 parts of an anti-aging agent; and 2 parts of paraffin.
The promoter comprises the following components in parts by weight: 3 parts of accelerator sulfur; 3 parts of an accelerator TMTD; and 3 parts of an accelerator DM.
The ratio of the white carbon black to the coupling agent to the dispersing agent is 10:2: 1.
A method of making a rotary gum center comprising the steps of:
a. the compound B for the sealed end 7 and the compound a for the supported end 8 were each prepared using an internal mixer by the following method:
a primary smelting process: and (3) heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 80 ℃, and adding the thin and smooth raw rubber into the internal mixer for internal mixing for 60 seconds. Then adding carbon black, and banburying for 120 seconds; then adding the white carbon black, the coupling agent and the dispersing agent, and banburying for 120-150 seconds; finally, adding auxiliary additives, banburying for 60-90 seconds at the temperature of 100-120 ℃, discharging, thinly passing on an open mill for 5 times after discharging, standing for 24 hours, and finally refining;
and (3) final refining: heating the internal mixer to 30 ℃, starting cooling water when the temperature of the internal mixer is set to 50 ℃, adding the master batch into the internal mixer, carrying out internal mixing for 120 seconds, adding the accelerator, carrying out internal mixing for 60 seconds, controlling the temperature within 70 ℃, and discharging. After discharging, thinly passing the mixture on an open mill for 5 times, discharging the mixture, standing for 24 hours, and vulcanizing;
b. pouring the rubber material of the sealed end 7 into a sealed end mould for shaping;
c. applying fifty tons of pressure by a press, and taking out the rubber body at the sealing end 7 after 5 min;
d. heating the vulcanizing machine to 70 ℃, placing the rubber body at the sealing end 7 into the bottom of the integral forming die, placing the rubber material A at the supporting end 8 into the rubber injection cylinder 6, and starting pressure injection until the rubber material A at the supporting end 8 is pressure-injected into the die 4 at the supporting end 8;
e. setting the temperature of a vulcanizing machine at 160 ℃ and the pressure of 200 tons, starting vulcanization for 3 hours, and then removing the integral forming die to obtain the finished product rotary rubber core.
A production mold comprises a sealing end mold and an integral forming mold;
the sealing end die comprises an upper die 1, a middle die 2 and a lower die 3, the upper die, the middle die 2 and the lower die 3 are sequentially installed from top to bottom, and the middle die 2 is provided with a ring groove 21 matched with the sealing end 7 of the rotary rubber core;
the whole forming die includes a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3, a rubber injection section of thick bamboo 6, goes up mould two 5, supports end mould 4, well mould 2 and lower mould 3 from last to installing down in proper order, support end mould 4 to open have and support the annular two 41 of holding 8 looks adaptations with the rotatory core that glues, annular one 21 sets up with annular two 41 coaxial lines.
The first ring groove 21 comprises a circular truncated cone-shaped groove with a large upper part and a small lower part, and a cylinder 22 is arranged along the axis of the circular truncated cone-shaped groove.
The second ring groove 41 comprises a special-shaped groove with an upper part being a cylinder 22 type and a lower part being a big-end-up small-end-up circular truncated cone type, and the special-shaped groove is provided with a central piece 42 formed by coaxially stacking two big-end-up small-end-up circular truncated cones along the axis.
This scheme centre piece 42 is piled up by a big round platform and a small circle platform and forms, the top surface of big round platform is the bottom surface of small circle platform.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a mould for producing rotatory gluey core which characterized in that: comprises a sealing end mould and an integral forming mould;
the sealing end die comprises an upper die I (1), a middle die (2) and a lower die (3), the upper die, the middle die (2) and the lower die (3) are sequentially installed from top to bottom, and the middle die (2) is provided with a first annular groove (21) matched with the sealing end (7) of the rotary rubber core;
whole forming die includes a rubber injection section of thick bamboo (6), goes up mould two (5), supports end mould (4), well mould (2) and lower mould (3), a rubber injection section of thick bamboo (6), goes up mould two (5), supports end mould (4), well mould (2) and lower mould (3) from last to installing down in proper order, support end mould (4) open have with rotatory gluey core support end (8) the annular two (41) of looks adaptation, annular one (21) and annular two (41) coaxial line setting.
2. The mold for producing rotary glue cores of claim 1, wherein: the first ring groove (21) comprises a circular truncated cone-shaped groove with a large upper part and a small lower part, and a cylinder (22) is arranged along the axis of the circular truncated cone-shaped groove.
3. The mold for producing rotary glue cores of claim 1, wherein: the second ring groove (41) comprises a special-shaped groove, wherein the upper part of the special-shaped groove is a cylinder (22) and the lower part of the special-shaped groove is a big-end-up small-end-up circular truncated cone, and a central piece (42) formed by coaxially stacking two big-end-up small-end circular truncated cones is arranged along the axis of the special-shaped groove.
4. The mold for producing rotary glue cores of claim 3, wherein: the central piece (42) is formed by stacking a large circular truncated cone and a small circular truncated cone, and the top surface of the large circular truncated cone is the bottom surface of the small circular truncated cone.
5. The mold for producing rotary glue cores of claim 1, wherein: and the upper die II (5) is provided with a glue injection hole (51), and the glue injection hole (51) corresponds to the ring groove II (41).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567898.9U CN210061750U (en) | 2019-04-24 | 2019-04-24 | Die for producing rotary rubber core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920567898.9U CN210061750U (en) | 2019-04-24 | 2019-04-24 | Die for producing rotary rubber core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849239A (en) * | 2019-01-28 | 2019-06-07 | 上海如实密封科技有限公司 | A kind of packing element die device and packing element preparation method |
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- 2019-04-24 CN CN201920567898.9U patent/CN210061750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849239A (en) * | 2019-01-28 | 2019-06-07 | 上海如实密封科技有限公司 | A kind of packing element die device and packing element preparation method |
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