CN109940133B - Manufacturing process method of clamp body casting modeling lower core frame - Google Patents
Manufacturing process method of clamp body casting modeling lower core frame Download PDFInfo
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- CN109940133B CN109940133B CN201910371384.0A CN201910371384A CN109940133B CN 109940133 B CN109940133 B CN 109940133B CN 201910371384 A CN201910371384 A CN 201910371384A CN 109940133 B CN109940133 B CN 109940133B
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Abstract
The invention relates to a manufacturing process method of a clamp body casting molding lower core frame, which comprises the following steps: firstly, copying a gypsum female die, secondly, copying a plastic die, and after finishing, additionally arranging air suction holes at corresponding positions according to a product structure to ensure the stability of a core setting process; testing the epoxy resin lower core frame plastic mold, and checking whether the epoxy resin lower core frame plastic mold can be normally used in a production field; the epoxy resin lower core frame plastic mold manufactured by the method has the advantages of high surface precision, good quality, firmness, durability and extremely high popularization and utilization value.
Description
Technical Field
The invention relates to the technical field of casting molds, in particular to a manufacturing process method of a lower core frame for clamp body casting modeling.
Background
The core drop frame on the core drop machine is a close tolerance for precise placement of the sand core in the mold cavity, which can only be handled by the molding machine through precise molding equipment (including the core drop frame), where the accuracy of the core drop frame directly affects the surface quality and dimensional accuracy of the casting. The core setting process is always operated by manual core setting, is improved into mechanical automatic core setting, and a corresponding die needs to be provided with an automatic core setting frame, so that the accurate core setting frame is turned into a key.
Disclosure of Invention
The invention aims to provide a process method for manufacturing a lower core frame of a molding machine, and the lower core frame manufactured by the method has high precision, good toughness, firmness and durability and is very beneficial to mechanical automatic core setting operation.
The specific scheme of the invention is as follows: a manufacturing process method of a clamp body casting molding lower core frame comprises the following steps:
firstly, copying a gypsum female die, which specifically comprises the following steps:
1-1, removing a positive pressure plate pouring system of the mold to be used as an outer mold, cleaning the surface of the mold, and then coating a layer of lubricating oil or green antirust agent to facilitate demolding;
1-2, positioning an aluminum lower core frame and an outer mold by using a positioning pin, fixing a clamping fixture, and pointing and filling gaps around by using a release agent or grease to prevent gypsum slurry from leaking;
1-3, preparing the gypsum slurry, wherein the using amount of the gypsum slurry is determined according to the using amount of the gypsum slurry required by the lower core frame of the mold by pouring the lower core frame: adding water into gypsum powder and water according to the ratio of 1: 1-1: 1.3, stirring, slowly expelling bubbles in the stirring process, kneading large gypsum blocks, and stirring until gypsum slurry is fine and free of large particles; pouring the uniformly stirred gypsum slurry into the aluminum lower core frame to be completely filled, and standing for more than 5-6 hours to obtain a lower core frame gypsum female die;
1-4, separating the lower core frame gypsum female die and the outer die, tapping the aluminum lower core frame around the lower core frame during separation, taking out the positioning pin rods, locking the aluminum lower core frame in tensioning screw holes of the aluminum lower core frame by using a lifting ring to slowly lift the aluminum lower core frame, drying the taken lower core frame gypsum female die in the shade for more than 5 hours, and recovering fittings and a pouring system on the copied die to avoid the influence on the normal production of the die due to corrosion of the die;
and secondly, duplicating a plastic mould, which comprises the following steps:
2-1, airing the copied lower core frame gypsum female die, inserting the lower core frame gypsum female die into a corresponding sand core, placing metal blocks around the sand core to increase the wear resistance, and blending viscous gypsum slurry for repairing according to the structure of a product and the design of a sand supplementing block of the die so as to avoid the sand squeezing condition of the copied lower core frame;
2-2, smearing a layer of lubricating oil or green antirust agent on the surface of the lower core frame gypsum master die to facilitate demoulding, oppositely clamping the other aluminum lower core frame, positioning the positioning pin rod and clamping the clamp tightly;
2-3, preparing and curing epoxy resin: the volume ratio of the curing agent is 17-30%, the curing agent is prepared by 3 times, 10-20% of diluent is added to increase the fluidity of the epoxy resin, and the single-time mixing amount is the amount of single-time full mixing and stirring;
2-4, slowly and uniformly pouring the epoxy resin prepared in the step 2-3 into the surface layer of the gypsum female die with the thickness of 7-10 mm, uniformly coating the surface layer with a scraper to form a shell die, standing the shell die in a shade place at ambient temperature to avoid direct insolation, covering a layer of glass fiber cloth after 0.5-1 hour to improve the strength and toughness of the epoxy resin plastic die, pouring the epoxy resin to cover two layers of glass fiber cloth 3 times after each layer of epoxy resin is coated, and demoulding after the epoxy resin is poured into the aluminum lower core frame to reach the height of 4/5 hours after the pouring process is finished;
2-5, removing the positioning pin rods, slowly separating the two oppositely clamped lower core frames, removing the sand cores on the epoxy resin plastic mold, polishing, and cleaning and flattening the excess epoxy resin after foaming;
2-6, additionally arranging air suction holes at corresponding positions according to the product structure to ensure the stability of the core setting process;
and 2-7, testing the epoxy resin lower core frame plastic mold, and checking whether the epoxy resin lower core frame plastic mold can be normally used in a production field.
The diluent in the invention is composed of toluene or acetone materials.
The ambient temperature in the invention is 20-24 ℃.
The upper surface of the epoxy resin lower core frame plastic mold is provided with a 1-2 mm anti-abrasion coating.
The overmolded lower core frame of the present invention is molded of epoxy in a specially designed aluminum standard lower core frame, the internal shape of the frame being such that the resin remains stable in the frame, the frame having four bolt holes for a quick locking system and for clamping the lower core frame to a lower core machine, similar to the pattern plate in a molding machine, the frame being guided by two guide pins on the lower core machine console, the placement of the cylindrically elongated guide pins being the same as in the case of the pattern plate, the lower core frame manufacturing process being essentially the process of manufacturing the negative of the counter plate.
The epoxy resin lower core frame plastic mold manufactured by the process method has high surface precision, good quality, firmness and durability and extremely high popularization and utilization value.
Detailed Description
The invention relates to a manufacturing process method of a clamp body casting molding lower core frame, which comprises the following steps:
firstly, copying a gypsum female die, which specifically comprises the following steps:
1-1, removing a positive pressure plate pouring system of the mold to be used as an outer mold, cleaning the surface of the mold, and then coating a layer of lubricating oil or green antirust agent to facilitate demolding;
1-2, positioning an aluminum lower core frame and an outer mold by using a positioning pin, fixing a clamping fixture, and pointing and filling gaps around by using a release agent or grease to prevent gypsum slurry from leaking;
1-3, preparing the gypsum slurry, wherein the using amount of the gypsum slurry is determined according to the using amount of the gypsum slurry required by the lower core frame of the mold by pouring the lower core frame: adding water into gypsum powder and water according to the ratio of 1: 1-1: 1.3, stirring, slowly expelling bubbles in the stirring process, kneading large gypsum blocks, and stirring until gypsum slurry is fine and free of large particles; pouring the uniformly stirred gypsum slurry into the aluminum lower core frame to be completely filled, and standing for more than 5-6 hours to obtain a lower core frame gypsum female die;
1-4, separating the lower core frame gypsum female die and the outer die, tapping the aluminum lower core frame around the lower core frame during separation, taking out the positioning pin rods, locking the aluminum lower core frame in tensioning screw holes of the aluminum lower core frame by using a lifting ring to slowly lift the aluminum lower core frame, drying the taken lower core frame gypsum female die in the shade for more than 5 hours, and recovering fittings and a pouring system on the copied die to avoid the influence on the normal production of the die due to corrosion of the die;
and secondly, duplicating a plastic mould, which comprises the following steps:
2-1, airing the copied lower core frame gypsum female die, inserting the lower core frame gypsum female die into a corresponding sand core, placing metal blocks around the sand core to increase the wear resistance, and blending viscous gypsum slurry for repairing according to the structure of a product and the design of a sand supplementing block of the die so as to avoid the sand squeezing condition of the copied lower core frame;
2-2, smearing a layer of lubricating oil or green antirust agent on the surface of the lower core frame gypsum master die to facilitate demoulding, oppositely clamping the other aluminum lower core frame, positioning the positioning pin rod and clamping the clamp tightly;
2-3, preparing and curing epoxy resin: the volume ratio of the curing agent is 17-30%, the curing agent is prepared by 3 times, 10-20% of diluent is added to increase the fluidity of the epoxy resin, and the single-time mixing amount is the amount of single-time full mixing and stirring;
2-4, slowly and uniformly pouring the epoxy resin prepared in the step 2-3 into the surface layer of the gypsum female die with the thickness of 7-10 mm, uniformly coating the surface layer with a scraper to form a shell die, standing the shell die in a shade place at ambient temperature to avoid direct insolation, covering a layer of glass fiber cloth after 0.5-1 hour to improve the strength and toughness of the epoxy resin plastic die, pouring the epoxy resin to cover two layers of glass fiber cloth 3 times after each layer of epoxy resin is coated, and demoulding after the epoxy resin is poured into the aluminum lower core frame to reach the height of 4/5 hours after the pouring process is finished;
2-5, removing the positioning pin rods, slowly separating the two oppositely clamped lower core frames, removing the sand cores on the epoxy resin plastic mold, polishing, and cleaning and flattening the excess epoxy resin after foaming;
2-6, additionally arranging air suction holes at corresponding positions according to the product structure to ensure the stability of the core setting process;
and 2-7, testing the epoxy resin lower core frame plastic mold, and checking whether the epoxy resin lower core frame plastic mold can be normally used in a production field.
Further, in this embodiment, the diluent is composed of toluene or acetone material.
Further, in the present embodiment, the ambient temperature is 20 to 24 ℃, and preferably 22 ℃.
Furthermore, in this embodiment, an anti-abrasion coating of 1-2 mm is disposed on the upper surface of the epoxy resin lower core frame plastic mold.
The overmolded lower core frame of the present invention is molded of epoxy in a specially designed aluminum standard lower core frame, the internal shape of the frame being such that the resin remains stable in the frame, the frame having four bolt holes for a quick locking system and for clamping the lower core frame to a lower core machine, similar to the pattern plate in a molding machine, the frame being guided by two guide pins on the lower core machine console, the placement of the cylindrically elongated guide pins being the same as in the case of the pattern plate, the lower core frame manufacturing process being essentially the process of manufacturing the negative of the counter plate.
Claims (4)
1. A manufacturing process method of a lower core frame of a clamp body in a casting molding mode is characterized by comprising the following steps: the method comprises the following steps:
firstly, copying a gypsum female die, which specifically comprises the following steps:
1-1, removing a positive pressure plate pouring system of the die to be used as an outer die, cleaning the surface of the die, and then coating a layer of lubricating oil or a green antirust agent;
1-2, positioning an aluminum lower core frame and an outer mold by using a positioning pin, fixing a clamping fixture, and pointing and filling gaps around by using a release agent or grease to prevent gypsum slurry from leaking;
1-3, preparing the gypsum slurry, wherein the using amount of the gypsum slurry is determined according to the using amount of the gypsum slurry required by the lower core frame of the mold by pouring the lower core frame: adding water into gypsum powder and water according to the ratio of 1: 1-1: 1.3, stirring, slowly expelling bubbles in the stirring process, kneading large gypsum blocks, and stirring until gypsum slurry is fine and free of large particles; pouring the uniformly stirred gypsum slurry into the aluminum lower core frame to be completely filled, and standing for more than 5-6 hours to obtain a lower core frame gypsum female die;
1-4, separating the lower core frame gypsum female die and the outer die, tapping the aluminum lower core frame around the lower core frame during separation, taking out the positioning pin rods, locking the aluminum lower core frame in tensioning screw holes of the aluminum lower core frame by using a lifting ring to slowly lift the aluminum lower core frame, drying the taken lower core frame gypsum female die in the shade for more than 5 hours, and recovering fittings and a pouring system on the copied die to avoid the influence on the normal production of the die due to corrosion of the die;
and secondly, duplicating a plastic mould, which comprises the following steps:
2-1, airing the copied lower core frame gypsum female die, inserting the lower core frame gypsum female die into a corresponding sand core, placing metal blocks around the sand core to increase the wear resistance, and blending viscous gypsum slurry for repairing according to the structure of a product and the design of a sand supplementing block of the die so as to avoid the sand squeezing condition of the copied lower core frame;
2-2, smearing a layer of lubricating oil or green antirust agent on the surface of the lower core frame gypsum master die, oppositely clamping the other aluminum lower core frame, positioning the positioning pin rod and clamping the clamp tightly;
2-3, preparing and curing epoxy resin: the volume ratio of the curing agent is 17-30%, the curing agent is prepared by 3 times, 10-20% of diluent is added to increase the fluidity of the epoxy resin, and the single-time mixing amount is the amount of single-time full mixing and stirring;
2-4, slowly and uniformly pouring the epoxy resin prepared in the step 2-3 into the surface layer of the gypsum female die with the thickness of 7-10 mm, uniformly coating the surface layer with a scraper to form a shell die, standing the shell die in a shade place at ambient temperature to avoid direct insolation, covering a layer of glass fiber cloth after 0.5-1 hour to improve the strength and toughness of the epoxy resin plastic die, pouring the epoxy resin to cover two layers of glass fiber cloth 3 times after each layer of epoxy resin is coated, and demoulding after the epoxy resin is poured into the aluminum lower core frame to reach the height of 4/5 hours after the pouring process is finished;
2-5, removing the positioning pin rods, slowly separating the two oppositely clamped lower core frames, removing the sand cores on the epoxy resin plastic mold, polishing, and cleaning and flattening the excess epoxy resin after foaming;
2-6, additionally arranging air suction holes at corresponding positions according to the product structure to ensure the stability of the core setting process;
and 2-7, testing the epoxy resin lower core frame plastic mold, and checking whether the epoxy resin lower core frame plastic mold can be normally used in a production field.
2. The manufacturing process method of the clamp body casting molding lower core frame according to claim 1, characterized in that: the diluent is composed of toluene or acetone material.
3. The manufacturing process method of the clamp body casting molding lower core frame according to claim 1, characterized in that: the ambient temperature is 20-24 ℃.
4. The manufacturing process method of the clamp body casting molding lower core frame according to claim 1, characterized in that: and a 1-2 mm anti-abrasion coating is arranged on the upper surface of the epoxy resin lower core frame plastic mold.
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| CN201910371384.0A CN109940133B (en) | 2019-05-06 | 2019-05-06 | Manufacturing process method of clamp body casting modeling lower core frame |
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| CN201910371384.0A CN109940133B (en) | 2019-05-06 | 2019-05-06 | Manufacturing process method of clamp body casting modeling lower core frame |
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| CN109940133B true CN109940133B (en) | 2020-11-06 |
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| CN1257793C (en) * | 2004-12-24 | 2006-05-31 | 瓦房店日瑞铸模有限公司 | Composite resin die |
| CN101642945A (en) * | 2009-08-24 | 2010-02-10 | 范跃民 | Method for manufacturing imitation jade process photo frame mold |
| CN104043775B (en) * | 2014-06-24 | 2016-05-04 | 浙江飞友康体设备有限公司 | A kind of manufacture method of aluminum dipping form |
| CN104693687A (en) * | 2015-03-20 | 2015-06-10 | 江西铜业股份有限公司 | Epoxy resin plastic mold formula and casting technology thereof |
| CN105945225B (en) * | 2016-07-11 | 2017-12-19 | 山东美陵化工设备股份有限公司 | Automobile brake base plate class casting descends chilling block device and Mechanical processing of casting method automatically |
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