CN216705905U - A heat preservation feed cylinder structure for squeeze casting - Google Patents

Abstract

The utility model discloses a heat-insulation charging barrel structure for extrusion casting, which relates to the technical field of extrusion casting die design and comprises an outer-layer charging barrel, an inner-layer charging barrel and a hammer head, wherein the outer-layer charging barrel is sleeved on the outer side of the inner-layer charging barrel, the inner-layer charging barrel is provided with a material channel for conveying liquid metal, the hammer head is arranged on the material channel and can slide in the material channel, an oil channel for conveying heat-conducting oil is arranged between the outer-layer charging barrel and the inner-layer charging barrel, the outer-layer charging barrel is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively communicated with two ends of the oil channel. Through the design of this oil duct, enable the shaft of conduction oil flow through the inlayer feed cylinder, realize the heating to the inlayer feed cylinder to can effectively solve the problem that the condensation layer appears, guarantee the internal structure and the mechanical strength of foundry goods, very big improvement the qualification rate of product.

Description

Heat-preservation charging barrel structure for extrusion casting

Technical Field

The utility model relates to the technical field of extrusion casting mold design, in particular to a heat-insulating charging barrel structure for extrusion casting.

Background

The extrusion casting technology is characterized by low-speed mold filling from bottom to top and high-pressure solidification feeding. Due to the characteristic of low-speed mold filling from bottom to top, the aluminum liquid is poured into the charging barrel firstly, and then the aluminum liquid is extruded into the cavity from bottom to top by the hammer head, in the process, the aluminum liquid is in contact with the charging barrel, so that the heat loss temperature of the aluminum liquid is reduced, meanwhile, a thin condensing layer is easy to appear on the inner wall of the charging barrel, and if mold filling casting is continued, the condensing layer enters the interior of a product to form a slag inclusion defect, so that the mechanical strength of the product is obviously reduced; therefore, in the extrusion casting process, the reduction of the generation of the condensed layer is an important means for solving the slag inclusion defect.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the utility model provides the heat-insulating charging barrel structure for squeeze casting, which not only reduces the heat loss of aluminum liquid, but also successfully reduces the generation of a condensation layer, ensures the internal structure and mechanical strength of a casting and greatly improves the qualification rate of products.

The heat-insulation charging barrel structure for extrusion casting comprises an outer-layer charging barrel, an inner-layer charging barrel and a hammer head, wherein the outer-layer charging barrel is sleeved on the outer side of the inner-layer charging barrel, the inner-layer charging barrel is provided with a material channel for conveying liquid metal, the hammer head is arranged on the material channel and can slide in the material channel, an oil channel for conveying heat conduction oil is arranged between the outer-layer charging barrel and the inner-layer charging barrel, the outer-layer charging barrel is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively communicated with two ends of the oil channel.

As a further improvement of the scheme, a spiral groove is formed in the outer side surface of the inner layer material cylinder along the axial direction of the inner layer material cylinder, and the outer layer material cylinder is sleeved on the outer side surface of the inner layer material cylinder and covers the groove to form the oil passage.

As a further improvement of the above scheme, the oil inlet is over against one end of the groove, and the oil outlet is over against the other end of the groove.

As a further improvement of the above aspect, the outer layer cartridge is clearance fit with the inner layer cartridge.

As a further improvement of the scheme, the barrel length of the outer barrel is smaller than that of the inner barrel, wherein the joint of the ends of the inner barrel and the outer barrel is connected in a sealing mode in a welding mode.

As a further improvement of the above scheme, the material channel penetrates through two ends of the inner layer material cylinder, the hammer head is in clearance fit with the inner layer material cylinder, and the liquid metal in the material channel is conveyed to a forming die butted with the end part of the material channel through the hammer head.

As a further improvement of the scheme, the outer layer material cylinder, the inner layer material cylinder and the hammer head are all made of die steel.

Based on the technical scheme, the embodiment of the utility model at least has the following beneficial effects: according to the technical scheme, the outer layer material cylinder is sleeved on the outer side of the inner layer material cylinder, the inner layer material cylinder is fixed on the extrusion casting machine through the outer layer material cylinder, the material channel for conveying liquid metal is arranged on the inner layer material cylinder, the liquid metal in the material channel is pushed into a forming die for mold filling casting from the end part of the material channel through a hammer head arranged in the material channel, the temperature of the inner wall of the normal inner layer material cylinder is lower than that of the liquid metal in a molten state, when a casting is extruded at present, the part of the liquid metal, which is in contact with the material channel wall of the inner layer material cylinder, is easily changed into a condensation layer due to temperature difference, if mold filling casting is continuously carried out, the condensation layer enters the inside of a product to form a slag inclusion defect, so that the mechanical strength of the product is obviously reduced, therefore, an oil duct for conveying heat conduction oil is arranged between the outer layer material cylinder and the inner layer material cylinder, before liquid metal is placed into a material channel, heat conduction oil heated to about 300 ℃ (the pouring temperature of aluminum liquid is generally 690-730 ℃) is circularly injected into an oil channel, the heat conduction oil heated to the rated temperature enters the oil channel from an oil inlet, flows through a barrel body of an inner layer charging barrel through the oil channel and flows out through an oil outlet, so that the heat of the continuously updated heat conduction oil is conducted into the inner layer charging barrel, the temperature of the inner wall of each position of the inner layer charging barrel is heated to a certain temperature, the problem of a condensation layer can be effectively solved, the internal organization and the mechanical strength of a casting are ensured, and the qualification rate of products is greatly improved. Meanwhile, the structure is simple, the production and the manufacture are easy, and the production cost can be effectively saved.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples;

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, the heat-insulating cylinder structure for squeeze casting according to the embodiment of the present invention includes an outer cylinder 110, an inner cylinder 120, and a hammer head 130, the outer cylinder 110 is sleeved outside the inner cylinder 120, the inner cylinder 120 is fixed to a squeeze casting machine through the outer cylinder 110, the inner cylinder 120 is provided with a material channel 121 for conveying liquid metal 150, the hammer head 130 is provided in the material channel 121 and can slide in the material channel 121, the liquid metal 150 in the material channel 121 is pushed into a forming mold for mold filling casting from an end of the material channel 121 through the hammer head 130 provided in the material channel 121, the temperature of the inner wall of the inner cylinder 120 is normally lower than that of the liquid metal 150 in a molten state, when squeeze casting is performed, due to a temperature difference, a portion where the liquid metal 150 contacts the wall of the material channel 121 of the inner cylinder 120 is easily changed into a condensation layer 140, if mold filling casting is continued, the condition that the condensed layer 140 enters the inside of the product to form slag inclusion defect can occur, and the mechanical strength of the product is obviously reduced, therefore, an oil channel 122 for conveying heat conducting oil is arranged between the outer layer charging barrel 110 and the inner layer charging barrel 120, the outer layer charging barrel 110 is provided with an oil inlet 111 and an oil outlet 112, the oil inlet 111 and the oil outlet 112 are respectively communicated with two ends of the oil channel 122, before the liquid metal 150 is placed into the material channel 121, the heat conducting oil heated to about 300 ℃ is circularly injected into the oil channel 122, the heat conducting oil heated to the rated temperature enters the oil channel 122 from the oil inlet 111, flows through the barrel body of the inner layer charging barrel 120 through the oil channel 122, and flows out through the oil outlet 112, so that the heat of the continuously updated heat conducting oil is conducted into the inner layer charging barrel 120, and the temperature of the inner wall of each position of the inner layer charging barrel 120 is heated to a certain temperature, and the problem that the condensed layer 140 occurs can be effectively solved, the extrusion casting die has the advantages that the internal structure and the mechanical strength of an extrusion casting product are guaranteed, the product percent of pass is greatly improved, meanwhile, the extrusion casting die is simple in structure, easy to produce and manufacture, capable of effectively saving production cost, and free of redesigning existing parts.

Further, a spiral groove is formed on the outer side surface of the inner layer charging barrel 120 along the axial direction, the outer layer charging barrel 110 is sleeved on the outer side surface of the inner layer charging barrel 120 and then covers the groove to form an oil passage 122, specifically, the outer layer charging barrel 110 is in clearance fit with the inner layer charging barrel 120, the groove is closed to form the oil passage 122 through the fit between the outer layer charging barrel 110 and the inner layer charging barrel 120, and it should be noted that the oil inlet 111 faces one end of the groove, the oil outlet 112 faces the other end of the groove, so that heat conducting oil heated by the mold temperature machine at a rated temperature can enter from the oil inlet 111 and then flows through the barrel body of the inner layer charging barrel 120 through the oil passage 122, due to the characteristic of fast heat dissipation of the heat conducting oil, in the process of flowing through the barrel body of the inner layer charging barrel 120, the heat is conducted to the barrel body of the inner layer charging barrel 120, then flows out from the oil outlet 112 and re-enters the mold temperature machine again for heating, so as to circularly heat the barrel body of the inner layer charging barrel 120, the temperature of the inner wall of the material channel 121 of the inner layer material barrel 120 is increased to a rated value, and the formation of the condensation layer 140 is reduced. It should be noted that, the barrel length of the outer barrel 110 is smaller than that of the inner barrel 120, wherein the joint between the ends of the inner barrel 120 and the outer barrel 110 is hermetically connected in a welding manner, even though the inner barrel 120 and the outer barrel 110 cannot form a closed oil passage 122 in a clearance fit manner, the joint between the ends of the inner barrel 120 and the outer barrel 110 is hermetically sealed in a welding manner, heat transfer oil can effectively flow through the barrel of the inner barrel 120, and the heat transfer oil can continuously enter from the oil inlet 111 and flow out from the oil outlet 112, so as to maintain the barrel temperature of the inner barrel 120 unchanged.

Specifically, the material channel 121 penetrates through two ends of the inner layer material cylinder 120, the hammer head 130 is in clearance fit with the inner layer material cylinder 120, the liquid metal 150 in the material channel 121 is conveyed to a forming die in butt joint with the end part of the material channel 121 through the hammer head 130, because the hammer head 130 is in clearance fit with the inner layer material cylinder 120, the hammer head 130 is located in the material channel 121 and can slide, when a casting is extruded, the liquid metal 150 in the material channel 121 can be pushed to the other end from one end of the material channel 121 through the hammer head 130, due to the design of the oil channel 122, it is ensured that the liquid metal 150 cannot form a condensation layer 140 in the material channel 121, and the forming quality of a subsequent extrusion-formed product is effectively ensured.

Preferably, outer feed cylinder 110, inner feed cylinder 120 and tup 130 are made by the mould steel, ensure that outer feed cylinder 110, inner feed cylinder 120 and tup 130 under the high temperature state can not take place to warp, effectively guarantee going on continuously of production.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (7)

1. The utility model provides a heat preservation feed cylinder structure for squeeze casting which characterized in that: including outer feed cylinder (110), inlayer feed cylinder (120) and tup (130), outer feed cylinder (110) cover is established the outside of inlayer feed cylinder (120), inlayer feed cylinder (120) are equipped with material way (121) that are used for carrying liquid metal (150), tup (130) are located material way (121) and can slide in material way (121), wherein, outer feed cylinder (110) with be equipped with oil duct (122) that are used for carrying the conduction oil between inlayer feed cylinder (120), outer feed cylinder (110) are equipped with oil inlet (111) and oil-out (112), oil inlet (111) with oil-out (112) communicate respectively the both ends of oil duct (122).

2. A heat-insulating barrel structure for squeeze casting according to claim 1, wherein: the outer side surface of the inner layer charging barrel (120) is provided with a spiral groove along the axial direction, and the outer layer charging barrel (110) is sleeved on the outer side surface of the inner layer charging barrel (120) and covers the groove to form the oil passage (122).

3. A heat-insulating barrel structure for squeeze casting according to claim 2, wherein: the oil inlet (111) is opposite to one end of the groove, and the oil outlet (112) is opposite to the other end of the groove.

4. A heat-insulating barrel structure for squeeze casting according to claim 2, wherein: the outer barrel (110) is clearance fit with the inner barrel (120).

5. A heat-insulating barrel structure for squeeze casting according to claim 2, wherein: the barrel length of the outer layer barrel (110) is smaller than that of the inner layer barrel (120), wherein the joint of the ends of the inner layer barrel (120) and the outer layer barrel (110) is in sealing connection in a welding mode.

6. A heat-insulating barrel structure for squeeze casting according to any one of claims 1 to 5, wherein: the material channel (121) penetrates through two ends of the inner layer material barrel (120), the hammer head (130) is in clearance fit with the inner layer material barrel (120), and liquid metal (150) in the material channel (121) is conveyed to a forming die in butt joint with the end part of the material channel (121) through the hammer head (130).

7. A heat-insulating barrel structure for squeeze casting according to any one of claims 1 to 5, wherein: the outer layer barrel (110), the inner layer barrel (120) and the hammer head (130) are all made of die steel.

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