CN109895412B - Adapter forming process - Google Patents
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- CN109895412B CN109895412B CN201910143393.4A CN201910143393A CN109895412B CN 109895412 B CN109895412 B CN 109895412B CN 201910143393 A CN201910143393 A CN 201910143393A CN 109895412 B CN109895412 B CN 109895412B
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Abstract
The invention discloses an adapter forming process, which comprises the following steps: s1: weighing hollow glass microspheres, triethylene diamine, F-12 and dimethyl silicone oil, adding the hollow glass microspheres, the triethylene diamine, the F-12 and the dimethyl silicone oil into adipic acid polyester alcohol to prepare a premix solution, and adding the premix solution into a high-pressure foaming machine charging bucket after the premix solution is uniform to obtain a component A; s2: putting solid diphenylmethane diisocyanate into an oven, heating and melting the solid diphenylmethane diisocyanate into a liquid state, and adding the liquid state into a charging bucket of a high-pressure foaming machine to obtain the component B; s3: assembling a die and preheating; s4: casting and molding the adapter body according to the set mixing ratio of the A component and the B component; s5: curing the cast adapter body; s6: demolding to obtain the adapter body; s7: hot-press forming an anti-friction film; s8: and pasting an anti-friction film. By adopting the components and the set proportion, the obtained foamed product has higher compressive strength under the same density, and has the advantages of light weight, high strength and the like, and meanwhile, the process is simple and the efficiency is high.
Description
Technical Field
The invention belongs to the technical field of emission systems, and particularly relates to an adapter forming process.
Background
The adapter (a lateral vibration damping support system of a box type launching missile is often called abroad) is a key part of a storage and transportation launching box, is arranged in an annular gap between the missile and the launching box, plays roles of supporting, damping, guiding, controlling initial disturbance and the like during launching in the processes of product storage, transportation and launching, fixes the missile during transportation and storage, plays a role of guiding during launching, and flies away from the launching box along with the missile. The adapter is made of rubber (such as natural rubber, butyl rubber, and the like), polyurethane elastomer, polyurethane foam, and the like, or a mixture of the above materials, wherein the polyurethane elastomer and the polyurethane foam are most widely used.
The structure of the adapter is designed according to the conditions of missile storage, transportation and launching platforms, particularly the conditions of static and dynamic stress-deformation characteristics and mechanical creep performance requirements, and the adapter is mainly hollow and solid. The hollow structure mostly meets the requirements of the adapter on static and dynamic stress-deformation performance through a pre-bent V-shaped column structure, and the solid structure meets the requirements of the adapter on static and dynamic stress-deformation performance through the unique characteristics of common foam materials. The traditional adapter comprises an annular elastic liner made of soft elastic materials, a multi-layer structure adapter formed by bonding three different materials (a sponge plate, a liner body and a polytetrafluoroethylene film) and the like, and the adapters are complex in structure, complex in preparation process and difficult to manufacture and install.
Chinese patent No. 2015109087236 discloses a missile adapter co-curing molding process, which is a manual foaming molding process, and has the defects that the performance of a foamed product is unstable due to uneven mixing of main raw materials, the production efficiency is low, the process is not suitable for batch engineering production, and the manual foaming operation safety is low; according to the method, the rubber-plastic plate is processed and then is tiled at the bottom of a mould to be foamed and molded, and due to the fact that the rubber-plastic plate and a foamed product are different in material, the problems that the peeling strength between the rubber-plastic plate and the foamed product is low, the rubber-plastic plate is prone to cracking and the like can exist after molding; in the patent, the composite polyether and the flame retardant are mixed and stirred uniformly, then the isocyanate is added, stirring is carried out at the stirring speed of 1200-1800 r/min for less than 2min until the mixture is fully mixed, and the operation may generate a foaming reaction before the mixture is poured into a mold; in addition, the foaming material is only composed polyether, flame retardant and isocyanate.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides an adapter forming process, which takes isocyanate and adipic acid polyester alcohol as main raw materials, hollow glass microspheres as reinforcing materials, triethylene diamine as a catalyst, a foaming agent F-12 and dimethyl silicone oil as a stabilizing agent as auxiliary materials, fully mixes the raw materials, pours the mixture into an assembled mould for forming, carries out curing treatment and demoulding, and finally sticks an antifriction film.
In order to achieve the purpose, the adapter forming process comprises the following steps:
s1: weighing 2-4 parts of reinforcing material hollow glass microspheres for activation, weighing 0.1-0.3 part of catalyst triethylene diamine, 4-6 parts of foaming agent F-12 and 1-3 parts of stabilizer dimethyl silicone oil as an auxiliary agent, adding the auxiliary agent into 100 parts of adipic acid polyester alcohol to prepare a premix solution, uniformly stirring by using a high-speed stirrer, and adding into a high-pressure foaming machine charging bucket to obtain a component A;
s2: heating solid diphenylmethane diisocyanate in an oven, heating and melting the solid diphenylmethane diisocyanate into a liquid state, weighing 95-100 parts of isocyanate, and adding the isocyanate into a high-pressure foaming machine charging bucket to obtain a component B;
s3: assembling a die, and preheating the die after the die is assembled, wherein the temperature of the die is ensured to be 26-50 ℃;
s4: respectively pouring the A component and the B component from two high-pressure foaming machine material tanks in S1 and S2 into a mould according to a set mixing ratio;
s5: after casting molding, carrying out curing treatment, wherein the curing treatment comprises a stabilizing stage and a curing stage;
s6: demolding to obtain an adapter body;
s7: hot-press forming an anti-friction film, placing the anti-friction film on a female die of a hot-press die in the middle, closing a male die, placing the hot-press die on a flat plate of a hot-press, and removing the die after the die is cooled to take out the formed anti-friction film;
s8: special glue for smearing the guide rail soft belt is applied to the surface of the adapter body, and an antifriction film is adhered to the surface of the adapter body.
Further, in step S3, the mold assembly specifically includes the following steps:
s31: the rib plates are arranged on the spring seat pins (2) and are connected and fastened by standard part screws, so that the assembly requirement is ensured;
s32: inserting the assembly parts of the spring seat pin (2) and the rib plate (3) into a die;
s33: inserting the molding positioning shaft (6) into the positioning hole of the special-shaped molding side plate (7);
s34: screwing down the connecting screws on each molded surface of the mold;
s35: the molding positioning shaft (6) is pulled out, and the cover plate (8) and the pouring opening cover are closed and locked; and inserting the molding positioning shaft into the positioning hole of the spring seat pin again to complete the die assembly.
Further, in step S4, the mixing ratio of the component A and the component B in the foaming machine is adjusted to be 1-1.05: 1, the pouring flow is 40 kg/min-60 kg/min, and the temperature is 20-28 ℃.
Further, in step S5, the stabilizing step includes pushing the mold away from the foaming casting area after the foaming process is completed for 4-6 min and standing for 25-30 min; the curing stage process comprises the steps of curing for 60-120 min under a natural environment, and then curing for 50-60 min at 60-70 ℃.
Further, in step S6, the demolding specifically includes the following steps:
disassembling the cover plate (8) and the pouring opening cover, pulling out the positioning contact pin, unscrewing the connecting screw and disassembling each profile of the die; cleaning the screws and foaming leakage materials around the screw holes;
taking out the molding positioning shaft (6) from the foaming piece by using a special demolding tool for the adapter;
and cleaning the foaming leakage in the hole of the forming positioning shaft (6).
Further, in step S7, the temperature of the hot-press formed antifriction film is 90-110 ℃, and the pressing time is 150-210 min.
Further, in step S8, the pressure for attaching the anti-friction film is 0.1MPa and the time is not less than 12 hours.
Further, in step S1, the method for activating the hollow glass beads includes: soaking the hollow glass beads in an Oregano coupling agent with the concentration of 85% for 24 hours, and then airing at room temperature.
Further, in step S1, the component a needs to be stirred for 40min or more.
Further, in step S2, the temperature at which the solid isocyanate is heated and melted is 60 to 70 ℃.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the adapter forming process provided by the invention takes isocyanate and adipic acid polyester alcohol as main raw materials, hollow glass microspheres as reinforcing materials, triethylene diamine as a catalyst, a foaming agent F-12 and dimethyl silicone oil as a stabilizer as auxiliary materials, the raw materials are fully mixed and then poured into an assembled mould for forming, then the mould is subjected to curing treatment and demoulding, and finally an antifriction film is pasted.
(2) The adapter forming process adopts equipment for pouring, foaming and forming, the equipment has an automatic stirring function, raw materials can be fully and uniformly mixed, the product performance stability is good, the preparation process method is simple, the operation is simple and convenient, the yield is high, and the production efficiency is high.
(3) According to the adapter forming process, the hollow glass beads serving as the reinforcing materials are added into the polymeric polyether, so that the strength of the rigid polyurethane foaming plastic can be obviously improved and the internal stress distribution is improved, and the size change rate of the product is reduced.
(4) The adapter forming process adopts the structural design that a metal structural part and a plastic product are integrated, firstly, a spring seat pin and a rib plate of the metal structural part are embedded in a mould, and the adapter body is integrally formed at one time by pouring foaming rigid polyurethane foam plastic through equipment.
(5) According to the adapter forming process, after the foamed product is prepared, the antifriction film is bonded on the adapter body by adopting the special adhesive, so that the bonding strength can be fully ensured, and the adapter forming process has good wear resistance and vibration reduction performance.
Drawings
FIG. 1 is a flow chart of an adapter molding process of the present invention;
FIG. 2 is a cross-sectional view of the adapter body of the present invention;
FIG. 3 is a cross-sectional view of the adapter body mold of the present invention;
FIG. 4 is a front view of the adapter body of the present invention;
fig. 5 is a rear view of the adapter body of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-adapter body foam plastic, 2-spring seat pin, 3-rib plate, 4-forming side plate, 5-positioning plate, 6-forming positioning shaft, 7-forming side plate and 8-cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a flow chart of an adapter molding process of the present invention, and as shown in fig. 1, the adapter molding process integrally foam-molding an adapter body by using a mold includes the following steps:
s1: preparing raw materials, weighing 2-4 parts of reinforcing material hollow glass microspheres (nano-scale) for activation, weighing 0.1-0.3 part of catalyst triethylene diamine, 4-6 parts of foaming agent F-12 and 1-3 parts of stabilizer dimethyl silicone oil, adding the auxiliary agents into 100 parts of adipic acid polyester alcohol to prepare a premix solution, placing for 72 hours, then uniformly stirring by a high-speed stirrer, adding into a high-pressure foaming machine charging bucket, and starting stirring for more than 40min to obtain a component A; putting solid diphenylmethane diisocyanate into an oven, heating to 60-70 ℃, heating and melting the solid diphenylmethane diisocyanate into liquid, weighing 95-100 parts of isocyanate, and adding the isocyanate into a charging bucket of a high-pressure foaming machine to obtain a component B;
the activation method of the hollow glass bead comprises the following steps: soaking the hollow glass beads in an Oregano coupling agent with the concentration of 85% for 24 hours, and then airing at room temperature. The activated nano-scale hollow glass microspheres are uniformly distributed in a rigid polyurethane foaming product, have no agglomeration phenomenon, strong adhesive force and good filling effect.
S2: assembling a spring seat pin 2 and a rib plate 3 of a metal embedded part, then assembling a die, and preheating the die after the die is assembled to ensure that the temperature of the die is 26-50 ℃;
s3: pouring the component A and the component B into a mold from two high-pressure foaming machine material tanks in S1 according to a set mixing ratio, setting the raw material temperature of foaming equipment to be 20-28 ℃, and mixing the component A and the component B in a foaming machine to be (1-1.05): and 1, pouring flow is 40 kg/min-60 kg/min, pouring weight is calculated according to the volume of a mold cavity and product density, pouring time is set according to the pouring weight and equipment flow, and pouring molding is carried out.
S4: curing, wherein the curing comprises a stabilizing stage and a curing stage, the stabilizing stage is characterized in that after the casting of S3 is finished and the foaming is finished, after 4-6 min, the die is pushed away from the foaming casting area and stands for 25-30 min; the curing process is that the raw materials are cured for 60-120 min in natural environment and then cured for 50-60 min at 60-70 ℃;
s5: demolding when the temperature of the mold is lower than 40 ℃ to obtain the adapter body, wherein demolding is carried out according to the reverse order of film combination;
s6: and (3) performing hot-press molding on the antifriction film, placing the antifriction film on the female die of the hot-press die in the middle, ensuring that the antifriction film is basically symmetrical along the central line of the groove on the female die, and closing the male die. Placing a hot-pressing mould on a flat plate of a hot press, wherein the hot-pressing temperature is 100 +/-10 ℃, the pressing time is 150-210 min, and after the mould is cooled to be below 40 ℃, the mould is unloaded, and the formed antifriction film is taken out and is made of a polytetrafluoroethylene plastic guide rail soft belt; the adapter body is bonded with the antifriction film by adopting a special adhesive, so that the bonding strength can be fully ensured, and the adapter has good wear resistance and vibration reduction performance;
s7: and (3) pasting an antifriction film on the surface of the adapter body by coating the special glue for the guide rail soft belt, wherein the pressure is 0.1MPa, and the time is not less than 12 hours.
The adapter forming process disclosed by the invention takes isocyanate and adipic acid polyester alcohol as main raw materials, hollow glass microspheres as reinforcing materials, triethylene diamine as a catalyst, a foaming agent F-12 and dimethyl silicone oil as a stabilizing agent as auxiliary materials, the auxiliary materials and the isocyanate are poured into an assembled mould for forming, the mould is subjected to curing and demoulding, and finally an anti-friction film is coated, the components and the limited proportion are adopted, so that the foamed material obtained after mixing can be ensured to have good compressive strength, and the compressive strength is more than or equal to 6.0MPa when the density is 0.25 g/cm 3-0.3 g/cm 3. According to the invention, the reinforcing material (hollow glass beads) is added into the polymeric polyether, the strength of the rigid polyurethane foaming plastic can be obviously improved by adding the reinforcing material, and the internal stress distribution is improved, so that the size change rate of the product is reduced, and the compressive strength of the rigid polyurethane foaming plastic without the reinforcing material (hollow glass beads) is only more than or equal to 4.5MPa within the range of the density section. Has the advantages of light weight, high strength, etc. By adopting the components and the limited mixture ratio, the obtained foamed product has higher compressive strength under the same density, and has the advantages of light weight, high strength and the like.
The invention adopts equipment for casting, foaming and molding, the equipment has an automatic stirring function, raw materials can be fully and uniformly mixed, the product performance stability is good, the preparation process method is simple, the operation is simple and convenient, the yield is high, and the production efficiency is high.
Example 1
S1: preparing raw materials, weighing 100 parts of adipic acid polyester alcohol, weighing 3 parts of reinforcing material hollow glass microspheres, 4 parts of foaming agent dichlorofluoroethane, 0.3 part of catalyst triethylene diamine and 2 parts of stabilizer dimethyl silicone oil according to a ratio, adding the materials into the adipic acid polyester alcohol to prepare a premix solution, standing for 72 hours, then uniformly stirring the premix solution by using a high-speed stirrer, adding the mixture into a high-pressure foaming machine material tank, and stirring the mixture for more than 40 minutes to obtain a component A;
and (2) putting the solid diphenylmethane diisocyanate into an oven, heating to 60 ℃, heating and melting the solid diphenylmethane diisocyanate into a liquid state, weighing 100 parts of isocyanate, and adding the isocyanate into a high-pressure foaming machine charging bucket to obtain the component B.
S2: the die assembly comprises the following steps:
s21: the rib plate 3 is arranged on the spring seat pin 2 and is connected and fastened by a standard part screw, so that the assembly requirement is ensured;
s22: inserting the assembly parts of the spring seat pin 2 and the rib plate 3 into a die; inserting the forming positioning shaft 6 into the positioning hole of the spring seat pin 2; screwing down the connecting screws on each molded surface of the mold; the molding positioning shaft 6 is pulled out, and the cover plate 8 and the pouring opening cover are closed and locked; inserting the positioning shaft into the positioning hole of the spring seat pin again; after assembly, the height of the molding side plate 7 is ensured to be consistent with that of the positioning plate 5 and the special-shaped molding plate 4;
s23: after the die is assembled, preheating the die to ensure that the temperature of the die is 26 ℃.
S3: foaming molding adapter body, setting the raw material temperature of the foaming equipment to be 23 ℃, and adjusting the mixing ratio of a foaming machine to be 1: and 1, pouring the molten steel at a flow rate of 40kg/min, calculating the pouring weight according to the volume of the cavity of the mold and the density of the product, setting the pouring weight to be 1200g, and pouring for 1.8s to perform pouring molding.
S4: curing, pouring, pushing the mould away from a foaming pouring area after foaming growth is finished, and standing for 30 min. And (3) placing the mould and the product together at the natural environment temperature for 90min for natural environment temperature curing treatment, and then placing the mould and the product into an oven with the temperature of 70 ℃ for 50min for curing treatment.
S5: and (3) demolding, namely demolding when the temperature of the mold is naturally cooled to be below 40 ℃, wherein demolding is carried out in the reverse order of film combination. The method specifically comprises the following steps: disassembling the cover plate 8 and the pouring opening cover; pulling out the positioning contact pin; unscrewing the connecting screw to disassemble each profile of the die; cleaning the screws and foaming leakage materials around the screw holes; taking out the molding positioning shaft 6 from the foaming piece by using a special demolding tool for the adapter; and cleaning up foaming leakage in the hole 6 of the forming positioning shaft.
S6: and (3) performing hot-press molding on the antifriction film, placing the antifriction film on the female die of the hot-press die in the middle, ensuring that the antifriction film is basically symmetrical along the central line of the groove on the female die, and closing the male die. And (3) placing the hot-pressing die on a flat plate of a hot press, carrying out hot-pressing at the temperature of 100 +/-10 ℃, pressing for 150min, and unloading the die after the die is cooled to be below 40 ℃ to take out the formed antifriction film.
S7: an antifriction film is adhered to the surface of an adapter body, special guide rail soft tape glue A, B is mixed according to the weight ratio of 2:1, the special guide rail soft tape glue is uniformly coated on the surface to be bonded of the antifriction film and the surface to be bonded of the adapter body, as shown in figure 4, the special guide rail soft tape glue is a front view of the adapter body, the surface A is a surface to be bonded of the adapter body, the antifriction film and the left and right adapter bodies are adhered together, the adhesion environment temperature is 10 ℃, the adhesion pressure is 0.1MPa, and the adhesion time is 12 hours at room temperature.
The adapter body obtained according to this example had a tensile strength of 2.7MPa or more, a compressive strength of 6.0MPa or more, and an impact strength of 1.3MPa or more.
Example 2
S1: preparing raw materials, weighing 100 parts of adipic acid polyester alcohol, weighing 2 parts of reinforcing material hollow glass microspheres, 5 parts of foaming agent dichlorofluoroethane, 0.1 part of catalyst triethylene diamine and 1 part of stabilizer dimethyl silicone oil according to a ratio, adding the reinforcing material hollow glass microspheres, the foaming agent dichlorofluoroethane, the catalyst triethylene diamine and the stabilizer dimethyl silicone oil into the adipic acid polyester alcohol to prepare a premix solution, standing for 72 hours, uniformly stirring by using a high-speed stirrer, adding the mixture into a high-pressure foaming machine material tank, and stirring for more than 40 minutes to obtain a component A;
and (2) putting the solid diphenylmethane diisocyanate into an oven, heating to 70 ℃, heating and melting the solid diphenylmethane diisocyanate into a liquid state, weighing 95 parts of isocyanate, and adding the isocyanate into a high-pressure foaming machine charging bucket to obtain the component B.
S2: the die assembly comprises the following steps:
s21: the rib plate 3 is arranged on the spring seat pin 2 and is connected and fastened by a standard part screw, so that the assembly requirement is ensured;
s22: inserting the assembly parts of the spring seat pin 2 and the rib plate 3 into a die; inserting the forming positioning shaft 6 into the positioning hole of the spring seat pin 2; screwing down the connecting screws on each molded surface of the mold; the molding positioning shaft 6 is pulled out, and the cover plate 8 and the pouring opening cover are closed and locked; inserting the positioning shaft into the positioning hole of the spring seat pin again; after assembly, the height of the molding side plate 7 is ensured to be consistent with that of the positioning plate 5 and the special-shaped molding plate 4;
s23: after the die is assembled, the die is preheated, and the temperature of the die is guaranteed to be 35 ℃.
S3: foaming and molding the adapter body, setting the raw material temperature of the foaming equipment to be 28 ℃, and adjusting the mixing ratio of a foaming machine to be 1.05: and 1, pouring the molten steel at a flow rate of 50kg/min, calculating the pouring weight according to the volume of the cavity of the mold and the density of the product, setting the pouring weight to be 1400g, and pouring for 1.7s to perform pouring molding.
S4: curing, pouring, pushing the mould away from a foaming pouring area after foaming growth is finished, and standing for 30 min. And (3) placing the mould and the product together at the natural environment temperature for 120min for natural environment temperature curing treatment, and then placing the mould and the product into an oven at the temperature of 65 ℃ for 60min for curing treatment.
S5: and (6) demolding.
When the temperature of the die is naturally cooled to below 40 ℃, demoulding is carried out, and demoulding is carried out according to the reverse order of film combination. The method specifically comprises the following steps: disassembling the cover plate 8 and the pouring opening cover; pulling out the positioning contact pin; unscrewing the connecting screw to disassemble each profile of the die; cleaning the screws and foaming leakage materials around the screw holes; taking out the molding positioning shaft 6 from the foaming piece by using a special demolding tool for the adapter; and cleaning up foaming leakage in the hole 6 of the forming positioning shaft.
S6: and (5) hot-press forming the antifriction film.
And placing the antifriction film on the female die of the hot-pressing die in the middle, ensuring that the antifriction film is basically symmetrical along the central line of the groove on the female die, and closing the male die. And (3) placing the hot-pressing die on a flat plate of a hot press, carrying out hot-pressing at the temperature of 100 +/-10 ℃, pressing for 210min, unloading the die after the die is cooled to below 40 ℃, and taking out the formed antifriction film.
S7: and adhering an antifriction film on the surface of the adapter body.
The special glue A, B for the guide rail soft belt is prepared according to the weight ratio of 2:1, the special glue for the guide rail soft belt is uniformly coated on the surface to be bonded of the antifriction film and the surface to be bonded of the adapter body, as shown in figure 4, which is a front view of the adapter body, surface A is the surface to be bonded of the adapter body, the antifriction film and the left and right adapter bodies are bonded together, the bonding environment temperature is 20 ℃, the bonding pressure is 0.1MPa, and the bonding time is 15 hours at room temperature.
The adapter body obtained according to this example had a tensile strength of 3.0MPa or more, a compressive strength of 6.0MPa or more, and an impact strength of 1.5MPa or more.
Example 3
S1: preparing raw materials, weighing 100 parts of adipic acid polyester alcohol, weighing 4 parts of reinforcing material hollow glass microspheres, 6 parts of foaming agent dichlorofluoroethane, 0.2 part of catalyst triethylene diamine and 3 parts of stabilizer dimethyl silicone oil according to a ratio, adding the obtained mixture into the adipic acid polyester alcohol to prepare a premix solution, standing for 72 hours, uniformly stirring the obtained product by using a high-speed stirrer, adding the obtained product into a high-pressure foaming machine material tank, and stirring the obtained product for more than 40 minutes to obtain a component A;
and (2) putting the solid diphenylmethane diisocyanate into an oven, heating to 70 ℃, heating and melting the solid diphenylmethane diisocyanate into a liquid state, weighing 98 parts of isocyanate, and adding the isocyanate into a high-pressure foaming machine charging bucket to obtain the component B.
S2: the die assembly comprises the following steps:
s21: the rib plate 3 is arranged on the spring seat pin 2 and is connected and fastened by a standard part screw, so that the assembly requirement is ensured;
s22: inserting the assembly parts of the spring seat pin 2 and the rib plate 3 into a die; inserting the forming positioning shaft 6 into the positioning hole of the spring seat pin 2; screwing down the connecting screws on each molded surface of the mold; the molding positioning shaft 6 is pulled out, and the cover plate 8 and the pouring opening cover are closed and locked; inserting the positioning shaft into the positioning hole of the spring seat pin again; after assembly, the height of the molding side plate 7 is ensured to be consistent with that of the positioning plate 5 and the special-shaped molding plate 4;
s23: after the die is assembled, the die is preheated, and the temperature of the die is ensured to be 50 ℃.
S3: foaming molding adapter body, setting the raw material temperature of the foaming equipment to be 26 ℃, and adjusting the mixing ratio of a foaming machine to be 1.02: and 1, pouring the molten steel at a flow rate of 60kg/min, calculating the pouring weight according to the volume of the cavity of the mold and the density of the product, setting the pouring weight to be 1600g, and pouring for 1.6s to perform pouring molding.
S4: curing, pouring, pushing the mould away from a foaming pouring area after foaming growth is finished, and standing for 30 min. And (3) placing the mould and the product together at the natural environment temperature for 100min for natural environment temperature curing treatment, and then placing the mould and the product into an oven at the temperature of 60 ℃ for 50min for curing treatment.
S5: and (3) demolding, namely demolding when the temperature of the mold is naturally cooled to be below 40 ℃, wherein demolding is carried out in the reverse order of film combination. The method specifically comprises the following steps: disassembling the cover plate 8 and the pouring opening cover; pulling out the positioning contact pin; unscrewing the connecting screw to disassemble each profile of the die; cleaning the screws and foaming leakage materials around the screw holes; taking out the molding positioning shaft 6 from the foaming piece by using a special demolding tool for the adapter; and cleaning up foaming leakage in the hole 6 of the forming positioning shaft.
S6: and (3) performing hot-press molding on the antifriction film, placing the antifriction film on the female die of the hot-press die in the middle, ensuring that the antifriction film is basically symmetrical along the central line of the groove on the female die, and closing the male die. And (3) placing the hot-pressing die on a flat plate of a hot press, pressing at the hot-pressing temperature of 100 +/-10 ℃ for 180min, and unloading the die after the die is cooled to below 40 ℃ to take out the formed antifriction film.
S7: an antifriction film is adhered to the surface of an adapter body, special guide rail soft tape glue A, B is mixed according to the weight ratio of 2:1, the special guide rail soft tape glue is uniformly coated on the surface to be bonded of the antifriction film and the surface to be bonded of the adapter body, as shown in figure 4, the special guide rail soft tape glue is a front view of the adapter body, the surface A is a surface to be bonded of the adapter body, the antifriction film and the left and right adapter bodies are adhered together, the temperature of the adhering environment is preferably 30 ℃, the adhering pressure is preferably 0.1MPa, and the adhering time is 20 hours at room temperature.
The adapter body obtained according to this example had a tensile strength of 3.7MPa or more, a compressive strength of 6.5MPa or more, and an impact strength of 1.6MPa or more.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An adapter molding process is characterized by comprising the following steps:
s1: weighing 2-4 parts of reinforcing material hollow glass microspheres for activation, weighing 0.1-0.3 part of catalyst triethylene diamine, 4-6 parts of foaming agent F-12 and 1-3 parts of stabilizer dimethyl silicone oil as an auxiliary agent, adding the auxiliary agent into 100 parts of adipic acid polyester alcohol to prepare a premix solution, uniformly stirring by using a high-speed stirrer, and adding into a high-pressure foaming machine charging bucket to obtain a component A;
s2: heating solid diphenylmethane diisocyanate in an oven, heating and melting the solid diphenylmethane diisocyanate into a liquid state, weighing 95-100 parts of isocyanate, and adding the isocyanate into a high-pressure foaming machine charging bucket to obtain a component B;
s3: assembling a die, and preheating the die after the die is assembled, wherein the temperature of the die is ensured to be 26-50 ℃;
s4: respectively pouring the A component and the B component from two high-pressure foaming machine material tanks in S1 and S2 into a mould according to a set mixing ratio;
s5: after casting molding, carrying out curing treatment, wherein the curing treatment comprises a stabilizing stage and a curing stage;
s6: demolding to obtain an adapter body;
s7: hot-press forming an anti-friction film, placing the anti-friction film on a female die of a hot-press die in the middle, closing a male die, placing the hot-press die on a flat plate of a hot-press, and removing the die after the die is cooled to take out the formed anti-friction film;
s8: smearing special glue for the guide rail soft belt on the surface of the adapter body, and sticking an antifriction film;
in step S3, the mold assembly specifically includes the following steps:
s31: the rib plates are arranged on the spring seat pins (2) and are connected and fastened by standard part screws, so that the assembly requirement is ensured;
s32: inserting the assembly parts of the spring seat pin (2) and the rib plate (3) into a die;
s33: inserting the molding positioning shaft (6) into the positioning hole of the spring seat pin (2);
s34: screwing down the connecting screws on each molded surface of the mold;
s35: the molding positioning shaft (6) is pulled out, and the cover plate (8) and the pouring opening cover are closed and locked; and inserting the molding positioning shaft into the positioning hole of the spring seat pin again to complete the die assembly.
2. The adapter molding process according to claim 1, wherein in step S4, the mixing ratio of the a component and the B component in the foaming machine is adjusted to 1 to 1.05: 1, the pouring flow is 40 kg/min-60 kg/min, and the temperature is 20-28 ℃.
3. The adapter molding process of claim 1, wherein in step S5, the process of the stabilization phase is to push the mold away from the foaming casting area and to stand for 25 to 30min after the foaming process is completed for 4 to 6 min; the curing stage process comprises the steps of curing for 60-120 min under a natural environment, and then curing for 50-60 min at 60-70 ℃.
4. The adapter molding process according to claim 1, wherein in step S6, the demolding specifically includes the following steps:
disassembling the cover plate (8) and the pouring opening cover, pulling out the positioning contact pin, unscrewing the connecting screw and disassembling each profile of the die; cleaning the screws and foaming leakage materials around the screw holes;
taking out the molding positioning shaft (6) from the foaming piece by using a special demolding tool for the adapter;
and cleaning the foaming leakage in the hole of the forming positioning shaft (6).
5. The adapter molding process of claim 1, wherein in step S7, the temperature of the anti-friction film is 90 ℃ to 110 ℃ and the pressing time is 150min to 210 min.
6. The process of claim 1, wherein in step S8, the pressure for applying the anti-friction film is 0.1MPa and the time is not less than 12 hours.
7. The adapter forming process according to claim 1, wherein in step S1, the method for activating the hollow glass beads is as follows: soaking the hollow glass beads in an Oregano coupling agent with the concentration of 85% for 24 hours, and then airing at room temperature.
8. The adapter forming process according to claim 1 or 7, wherein in step S1, the component a is stirred for more than 40 min.
9. The adapter molding process according to claim 1, wherein the solid isocyanate is melted by heating at a temperature of 60 ℃ to 70 ℃ in step S2.
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| CN201910143393.4A CN109895412B (en) | 2019-02-26 | 2019-02-26 | Adapter forming process |
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| CN201910143393.4A CN109895412B (en) | 2019-02-26 | 2019-02-26 | Adapter forming process |
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| CN106370056B (en) * | 2016-08-30 | 2018-06-19 | 中国兵器工业导航与控制技术研究所 | Adapter leaves the right or normal track emitter while bearing band bearing is combined |
| CN108752557B (en) * | 2018-06-11 | 2021-06-04 | 成都科大博创科技有限公司 | Polyurethane modified polyol and polyurethane foam plastic prepared from same |
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