False core designed in split mode and used in combined mode

Abstract

The utility model relates to a split design and combined use false core, which comprises a false core inner part, the false core exterior wraps the outer side of the false core interior; wherein the interior of the false core is pressed through an independent mold, and the cooled interior of the false core is put into a false core mold to press the exterior of the false core; and the inner part and the outer part of the false core become a whole with stable size. According to the utility model, the integral false core is divided into the false core interior and the false core exterior, the false core interior is firstly pressed by an independent mold, and then the cooled false core interior is put into the false core mold to press the false core exterior, so that the false core interior and the false core exterior become a whole with stable size; an original integrated false core is changed into a split design, and after the false core is combined for use, the problem that the size of a large false core single body is unstable in design is solved, the size of the large false core is stabilized, and scrapping of a wax mold caused by the size problem is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of investment casting, in particular to a fake core with split design and combined use. Background Art

[0002] Turbochargers are used in gasoline and diesel internal combustion engines. As the weight and size of turbocharger turbines increase, the conventional dummy core design can no longer meet the production size requirements. It has the following problems:

[0003] Traditional dummy core designs are too large and heavy, leading to dimensional instability due to shrinkage. Consequently, the dimensions of the wax model produced using this dummy core are also unstable, causing the model to exceed dimensional tolerances and become scrapped. However, if the dummy core is designed to be too small, its dimensions may be stable, but it will not be able to support the wax model, causing the model to exceed dimensional tolerances and become scrapped. When the dummy core's volume increases to a certain level, its dimensions will fluctuate significantly. If this continues, the resulting wax model will be unstable if the traditional dummy core design is used.

[0004] To this end, we propose a fake core with a split design and combined use. Utility Model Content

[0005] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a dummy core with a split design and combined use, thereby dividing an integral dummy core into a dummy core interior and a dummy core exterior. The dummy core interior is first pressed with an independent mold, and then the cooled dummy core interior is placed in the dummy core mold to press the dummy core exterior, so that the dummy core interior and the dummy core exterior become a dimensionally stable whole. The original integral dummy core is changed to a split design and then used in combination: the dimensional instability problem of the large dummy core single body design is eliminated, the size of the large dummy core is stabilized, and the scrapping of wax molds due to size problems is reduced.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A dummy core with a split design and combined use, comprising:

[0008] Inside the fake core;

[0009] The outer part of the false core is covered on the outer side of the inner part of the false core;

[0010] The inside of the dummy core is pressed through a separate mold, and the cooled inside of the dummy core is placed in the dummy core mold to press the outside of the dummy core, so that the inside of the dummy core and the outside of the dummy core become a dimensionally stable whole.

[0011] It is further characterized by:

[0012] The inner part and the outer part of the dummy core are formed by pressing wax.

[0013] The interior of the dummy core is first pressed, so that the interior of the dummy core can support the dummy core, making the size of the dummy core more stable.

[0014] A pre-pressed dummy core inner core is provided inside the dummy core for supporting the inside of the dummy core.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model has a compact and reasonable structure and is easy to operate. An integral dummy core is divided into a dummy core interior and a dummy core exterior. The dummy core interior is first pressed with an independent mold, and then the cooled dummy core interior is placed in the dummy core mold to press the dummy core exterior, so that the dummy core interior and the dummy core exterior become a dimensionally stable whole. The original integral dummy core is changed into a split design, and then after combined use, the dimensional instability problem of a large dummy core single-body design is eliminated, the size of the large dummy core is stabilized, and the scrapping of wax molds due to dimensional problems is reduced.

[0017] At the same time, the utility model also has the following advantages:

[0018] (1) If the product is particularly large, resulting in a particularly large fake core, the problem cannot be solved by dividing the fake core into two parts, the fake core can be further divided into three layers, inner, middle, and outer, or even more parts to solve the size problem of the fake core itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 This is a schematic diagram of the interior of the fake core of the present invention.

[0021] Among them: 1. Inside the fake core; 2. Outside the fake core. DETAILED DESCRIPTION

[0022] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0023] like Figure 1-Figure 2 As shown, a dummy core designed for combined use includes a dummy core inner portion 1 and a dummy core outer portion 2.

[0024] The inner core 1 is pressed in a separate mold. After cooling, it is placed inside the mold to press the outer core 2, forming a single unit. After cooling, the core can be used normally. The outer core 2 is then wrapped around the outer core 1, forming a single unit. Both are formed by pressing wax.

[0025] A whole dummy core is divided into a dummy core inner part 1 and a dummy core outer part 2. The dummy core inner part 1 is first pressed with an independent mold, and then the cooled dummy core inner part 1 is placed in the dummy core mold to press the dummy core outer part 2, so that the dummy core inner part 1 and the dummy core outer part 2 become a dimensionally stable whole. The original one-piece dummy core is changed to a split design, and then used in combination: the dimensional instability problem of the large dummy core single-body design is eliminated, the size of the large dummy core is stabilized, and the scrapping of wax molds due to size problems is reduced.

[0026] If the product is particularly large, resulting in a particularly large fake core, dividing the fake core into two parts, inner and outer, cannot solve the problem. The fake core can be further divided into three layers, inner, middle, and outer, or even more parts to solve the size problem of the fake core itself.

[0027] It can ensure the stability of the size of large dummy cores, reduce the scrapping of wax molds due to size problems, and thus save production costs and improve efficiency.

[0028] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A dummy core designed for use in combination with a split design, characterized in that: include: The interior of the dummy core (1) is provided with a pre-pressed dummy core inner core; The outer portion of the dummy core (2) is covered on the outer side of the inner portion of the dummy core (1); The interior of the dummy core (1) is pressed by a separate mold, and a pre-pressed dummy core inner core is provided inside the interior of the dummy core (1), and the dummy core inner core supports the interior of the dummy core (1). The cooled interior of the dummy core (1) is placed in a dummy core mold to press the exterior of the dummy core (2), and the interior of the dummy core (1) supports the dummy core; thus, the interior of the dummy core, the interior of the dummy core (1) and the exterior of the dummy core (2) become a dimensionally stable whole.

2. The dummy core of the split design and combination as claimed in claim 1, characterized in that: The inner part (1) and the outer part (2) of the dummy core are both formed by pressing wax.

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