A melting cup for a die casting machine

Abstract

The present invention relates to a melting cup for a die-casting machine, comprising a cup body and a core barrel; a through hole is provided on the first end face of the cup body; an expansion hole is provided on the first end face of the cup body, the expansion hole is coaxially arranged with the through hole, and the diameter of the expansion hole is larger than the diameter of the through hole; the core barrel is coaxially arranged in the expansion hole; the first ends of the side walls of the cup body and the core barrel are provided with overlapping liquid inlets; the core barrel is detachably connected to the cup body. The melting cup for a die-casting machine described in the present invention is provided with an expansion hole on the cup body, thereby making the core barrel and the cup body detachable. When the liquid inlet is corroded and hollowed by the alloy liquid, the damaged core barrel can be replaced and continued to be used without replacing the entire cup body, thereby saving costs; the present invention has a simple structure, is easy to disassemble and assemble, and improves replacement efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of melting cups, and in particular to a melting cup for a die-casting machine. Background Art

[0002] Die casting is a metal casting process characterized by the use of high pressure to pressurize molten metal into a mold cavity. The mold is usually made of a stronger alloy and the process is somewhat similar to injection molding. Most die castings are non-ferrous, such as zinc, copper, aluminum, magnesium, lead, tin, lead-tin alloys and their alloys. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required. Casting equipment and molds are expensive, so the die casting process is generally only used to manufacture large quantities of products in batches. It is relatively easy to manufacture die-cast parts, which generally requires only four major steps and the incremental cost per unit is very low. Die casting is particularly suitable for manufacturing large quantities of small and medium-sized castings, so die casting is the most widely used of various casting processes. Compared with other casting techniques, die casting has a smoother surface and higher dimensional consistency.

[0003] When using a traditional die-casting cup, it is often necessary to pour high-temperature working liquid into the die-casting cup body. When used for a long time, if the inner cavity of the die-casting cup is not replaced in time, it will seriously affect the quality of the casting. Generally, the die-casting cup is scrapped and replaced as a whole after a period of use. This practice is costly and inconvenient for large-scale promotion and use.

[0004] In addition, the injection punch is a key part in metal die-casting production. The injection punch cooperates with the melting cup, and its working principle is similar to the push rod and syringe of a syringe, pushing the molten alloy liquid into the melting cup. The size gap between the injection punch and the inner wall of the melting cup is very small, generally less than 0.05mm. During use, the cylindrical surface of the injection punch is subject to two types of wear. When the wear of the injection punch is greater than the allowable gap, it is scrapped. At present, there are many manufacturing processes for injection heads. The traditional production process uses ductile iron for manufacturing, which is low in cost but short in life; the injection head is surface treated, such as laser alloying surface treatment, which has a long service life, but high cost; using beryllium bronze to manufacture, the injection head cooperates well with the die-casting cavity and has a long service life, but the cost is high, and beryllium is a highly toxic substance. The production of beryllium bronze pollutes the environment; using bimetal manufacturing, the service life is long, but the processing technology is complex and the cost is high. Summary of the invention

[0005] Based on this, the purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a melting cup for a die casting machine.

[0006] A melting cup for a die-casting machine, comprising a cup body and a core barrel;

[0007] A through hole is provided on the first end surface of the cup body; an expansion hole is provided on the first end surface of the cup body, the expansion hole is coaxially arranged with the through hole, and the diameter of the expansion hole is larger than the diameter of the through hole;

[0008] The core barrel is coaxially arranged in the expansion hole; the first ends of the side walls of the cup body and the core barrel are provided with overlapping liquid inlets; the core barrel and the cup body are detachably connected;

[0009] The first end surface of the core barrel is evenly provided with at least one card slot around its circumference; the length of the card slot is shorter than the length of the core barrel, and the card slot penetrates the side wall of the core barrel along the thickness direction of the side wall of the core barrel; and also includes at least one card strip, the card strip corresponds to the cross-sectional shape of the card slot; the card strip is slidably arranged in the card slot;

[0010] The sides of the clamping slots are provided with guide grooves; the cross-sectional shape of the clamping strip corresponds to the cross-sectional shape of the clamping slot and the guide grooves combined;

[0011] The side walls of the core barrel and the cup body are provided with a plurality of corresponding bolt holes;

[0012] The bolt holes of the core barrel are arranged on the clamping strip;

[0013] The inner wall of the expansion hole is provided with a positioning groove along its axial direction; the outer wall of the core barrel is provided with a corresponding positioning boss;

[0014] It also includes a punch; the punch is slidably disposed in the first end of the core barrel; the side wall of the punch is provided with an oil groove, and the oil groove is spiral;

[0015] The number of turns of the oil tank is 1-2; the rise angle of the oil tank is 15-25°. The melting cup for the die-casting machine of the present invention is provided with an expansion hole on the cup body, so that the core barrel and the cup body are detachably arranged. When the liquid inlet is corroded and hollowed by the alloy liquid, the damaged core barrel can be replaced and continued to be used without replacing the entire cup body, thereby saving costs. The present invention has a simple structure, is easy to disassemble and assemble, and improves replacement efficiency.

[0016] Furthermore, a heat dissipation groove is provided on the inner wall of the second end of the cup body around its circumference; and a heat dissipation material is provided in the heat dissipation groove.

[0017] The beneficial effect of adopting the above further solution is that by providing the heat dissipation groove, the cup body can be reduced in material and production cost can be reduced. At the same time, heat dissipation material can be provided to effectively dissipate heat for the cup body, reduce deformation and increase service life.

[0018] Furthermore, the liquid inlet is provided with a chamfer around its circumference.

[0019] The beneficial effect of adopting the above further solution is that, by providing a chamfer, the opening of the liquid inlet can be enlarged, thereby facilitating the pouring of alloy liquid.

[0020] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a melting cup for a die casting machine of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of a melting cup for a die-casting machine of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the cup body of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the core barrel of the present invention;

[0025] Figure 5 The schematic diagram of the structure of the card strip of the present invention is

[0026] Figure 6 It is a schematic structural diagram of the punch of the present invention.

[0027] In the figure: 10, cup body; 11, through hole; 12, expansion hole; 13, liquid inlet; 131, chamfer; 14, positioning groove; 15, heat dissipation groove; 20, core tube; 21, clamping groove; 22, guide groove; 23, positioning boss; 30, clamping strip; 40, bolt hole; 50, punch; 51, oil groove. DETAILED DESCRIPTION

[0028] See also Figures 1 to 6 , a melting cup for a die-casting machine of this embodiment includes a cup body 10, a core barrel 20, two clamping strips 30, and a punch 50;

[0029] Specifically, the first end surface of the cup body 10 is provided with a through hole 11; the first end surface of the cup body 10 is provided with an expansion hole 12, the expansion hole 12 is coaxially arranged with the through hole 11, and the diameter of the expansion hole 12 is larger than the diameter of the through hole 11;

[0030] Specifically, the core barrel 20 is coaxially arranged in the expansion hole 12; the first ends of the side walls of the cup body 10 and the core barrel 20 are provided with overlapping liquid inlets 13; the core barrel 20 is detachably connected to the cup body 10.

[0031] In the preferred embodiment, the first end surface of the core barrel 20 is evenly distributed with two card grooves 21 around its circumference; the length of the card groove 21 is shorter than the length of the core barrel 20, and the card groove 21 penetrates the side wall of the core barrel 20 along the thickness direction of the side wall of the core barrel 20; the card strip 30 corresponds to the cross-sectional shape of the card groove 21; the card strip 30 is slidably set in the card groove 21.

[0032] In the preferred embodiment, the side surfaces of the clamping slot 21 are provided with guide grooves 22 ; the cross-sectional shape of the clamping strip 30 corresponds to the cross-sectional shape of the clamping slot 21 and the guide groove 22 combined.

[0033] In the preferred embodiment, six corresponding bolt holes 40 are respectively provided on the side walls of the core tube 20 and the cup body 10, three bolt holes 40 are respectively provided on both sides of each side wall, and the bolt holes 40 on the same side are arranged vertically; bolts can be set to pass through the corresponding bolt holes 40 to fix the core tube 20 and the cup body 10.

[0034] In the preferred embodiment, the bolt hole 40 of the core barrel 20 is arranged on the clamping strip 30 .

[0035] In the preferred embodiment, the inner wall of the expansion hole 12 is provided with a positioning groove 14 along its axial direction; the outer wall of the core barrel 20 is provided with a corresponding positioning boss 23 .

[0036] In the preferred embodiment, the punch 50 is slidably disposed in the first end of the core barrel 20 to push the alloy liquid into the die casting mold; the side wall of the punch 50 is provided with an oil groove 51, and the oil groove 51 is spiral;

[0037] More specifically, the number of turns of the oil groove 51 is 1-2 turns, and preferably two turns in this embodiment; the rise angle of the oil groove 51 is 15-25°, and preferably 20° in this embodiment.

[0038] More specifically, a heat dissipation groove 15 is provided on the inner wall of the second end of the cup body 10 around its circumference; and a heat dissipation material is provided in the heat dissipation groove 15 .

[0039] More specifically, the liquid inlet 13 is provided with a chamfer 131 around its circumference.

[0040] The working process of this embodiment:

[0041] During operation, high temperature alloy liquid is poured in through the liquid inlet 13, the alloy liquid flows into the core barrel 20, and the punch 50 slides in the core barrel 20, thereby injecting the alloy liquid, and the alloy liquid enters the cup body 10, and then is transported to the die casting mold;

[0042] When the core barrel 20 is damaged, the bolts can be removed to take out the core barrel 20 and then replace it with a new one.

[0043] Compared with the prior art, the present invention arranges an expansion hole on the cup body so that the core tube and the cup body are detachably arranged. When the liquid inlet is corroded and hollowed by the alloy liquid, the damaged core tube can be replaced and can continue to be used without replacing the entire cup body, thus saving costs. The present invention has a simple structure, is easy to disassemble and assemble, and improves replacement efficiency.

[0044] In addition, the present invention also has the following beneficial effects:

[0045] By setting the card slot, it can be avoided that when the core barrel is deformed by high temperature and difficult to remove, the card strip can be removed first, so that the side wall of the core barrel has a certain deformation space, which is convenient for taking out the damaged core barrel and replacing it; the card strip is detachable and reusable, which greatly reduces the cost of the core barrel;

[0046] By providing the guide groove, the card strip and the card slot are integrated;

[0047] By setting the bolt holes, the core barrel and the cup body can be quickly disassembled and assembled;

[0048] By setting the bolt holes on the clamping strip, the core barrel can be firmly fixed on the cup body; since the clamping strip can be reused when the core barrel is replaced, the bolt holes are set on the clamping strip instead of on the side wall of the core barrel, which can greatly reduce the processing cost and replacement cost of the core barrel;

[0049] By setting the positioning groove, the core barrel can be quickly positioned and installed through the cooperation of the positioning groove and the positioning boss, so that the bolt hole of the cup body matches the bolt hole corresponding to the clamping strip, so that the bolt can be quickly installed to fix the cup body and the core barrel;

[0050] When the punch moves, evenly apply lubricating oil on the oil groove to ensure that a complete lubricating surface is formed between the punch and the core barrel, ensuring that the punch moves smoothly in the core barrel, thereby increasing the life of the melting cup and the punch;

[0051] By setting the heat dissipation groove, the cup body can be reduced in material, and the production cost can be reduced. At the same time, the heat dissipation material can be set to effectively dissipate the heat for the cup body, reduce deformation, and increase the service life;

[0052] By setting the chamfer, the opening of the liquid inlet can be enlarged, making it easier to pour the alloy liquid.

[0053] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A melting cup for a die casting machine, characterized in that: include A cup body (10), wherein a through hole (11) is provided on a first end surface of the cup body (10); an expansion hole (12) is provided on the first end surface of the cup body (10), the expansion hole (12) is coaxially arranged with the through hole (11), and the diameter of the expansion hole (12) is greater than the diameter of the through hole (11); A core barrel (20), the core barrel (20) being coaxially arranged in the expansion hole (12); the first ends of the side walls of the cup body (10) and the core barrel (20) being provided with overlapping liquid inlets (13); the core barrel (20) and the cup body (10) being detachably connected; The first end surface of the core barrel (20) is evenly provided with at least one clamping groove (21) around its circumference; the length of the clamping groove (21) is shorter than the length of the core barrel (20), and the clamping groove (21) penetrates the side wall of the core barrel (20) along the thickness direction of the side wall of the core barrel (20); and also includes at least one clamping strip (30), the cross-sectional shape of the clamping strip (30) corresponds to that of the clamping groove (21); the clamping strip (30) is slidably arranged in the clamping groove (21); The side surfaces of the clamping slot (21) are each provided with a guide slot (22); the cross-sectional shape of the clamping strip (30) corresponds to the cross-sectional shape of the clamping slot (21) and the guide slot (22) combined; A plurality of corresponding bolt holes (40) are provided on the side walls of the core barrel (20) and the cup body (10); The bolt hole (40) of the core barrel (20) is arranged on the clamping strip (30); The inner wall of the expansion hole (12) is provided with a positioning groove (14) along its axial direction; the outer wall of the core barrel (20) is provided with a corresponding positioning boss (23); It also includes a punch (50); the punch (50) is slidably disposed in the first end of the core barrel (20); an oil groove (51) is provided on the side wall of the punch (50), and the oil groove (51) is spiral-shaped; The number of turns of the oil groove (51) is 1-2 turns; the rise angle of the oil groove (51) is 15-25°.

2. The melting cup for a die casting machine according to claim 1, characterized in that: A heat dissipation groove (15) is provided on the inner wall of the second end of the cup body (10) around its circumference; and heat dissipation material is provided in the heat dissipation groove (15).

3. The melting cup for a die casting machine according to claim 2, characterized in that: The liquid inlet (13) is provided with a chamfer (131) around its circumference.

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