A liquefaction and vitrification tooling frame for lost foam shell process

Abstract

The utility model relates to a liquefaction porcelainization tooling frame for lost foam hollow shell process belongs to lost foam casting technical field to solve the problem that the existing lost foam hollow shell casting adopts the existing model tooling frame to carry out yellow module liquefaction and porcelainization procedure, and the model tooling frame manufacturing cost is high, and the hollow shell yield is low, and the product applicability is poor and the production cycle is long. The present application includes tooling frame body and guide plate, and the tooling frame body includes mounting frame and several vertical supports, and the several vertical supports are fixedly installed on the mounting frame, and the vertical supports are enclosed into a placing cavity; a plurality of mounting blocks are arranged on the frame body of the vertical support, and the connecting rods are installed between the mounting blocks of the mounting frame with the same distance, and the model mounting platform is formed; the guide plate is installed on the mounting frame, and at least part of the plate surface faces the mounting platform, and the remaining part of the plate surface faces the heat source. The tooling frame of the present application has low cost, high product applicability, high hollow shell yield and good production efficiency during production.

Description

Technical Field

[0001] This utility model relates to a liquefied ceramic chemical assembly for lost foam casting shell process, belonging to the field of lost foam casting technology. Background Technology

[0002] Lost foam casting has developed rapidly in recent years, with continuous improvement in production technology and quality. The range of castings has expanded from simple wear-resistant parts and gray iron parts to mass-produced engineering machinery parts, automotive parts, pumps and valves that require pressure testing, as well as complex cylinder blocks, cylinder heads, water-cooled series products, and products with high requirements for casting materials such as ductile iron, low carbon steel, and aluminum alloys. The production process technology and product quality have made great strides, and there are precedents to learn from.

[0003] While lost foam casting has many advantages, it also has certain drawbacks, such as the tendency for castings to develop carbon slag and carbon buildup. Therefore, lost foam shell casting was developed, which adds liquefaction and vitrification processes to burn off the foam in the yellow mold before pouring and to increase the strength of the coating layer to meet the requirements of shell casting.

[0004] In existing technologies, yellow molds are placed in model fixtures and subjected to liquefaction and vitrification processes in a liquefaction furnace and a vitrification furnace, respectively. However, existing liquefaction and vitrification processes have shortcomings. For example: 1. Existing model fixtures have a single specification. Different sizes of yellow molds require different fixtures, resulting in high manufacturing costs and low product applicability. 2. Existing model fixtures create heating dead zones during heating in the liquefaction and vitrification furnaces, leading to uneven heating and incomplete burning of foam, affecting the yield of empty shells. 3. Due to the different heating temperatures for liquefaction and vitrification (300℃ for the liquefaction furnace and 900℃ for the vitrification furnace), existing fixtures have short lifespans when used together in environments with large temperature differences, increasing production costs. Therefore, to reduce costs, two types of model fixtures are used for the liquefaction and vitrification processes respectively. This requires changing the fixtures between the two processes, resulting in a longer production cycle. Therefore, a liquefied ceramic fixture is needed for the lost foam shell casting process to solve the problems of high manufacturing cost, low shell yield, poor product applicability, and long production cycle when using existing model fixtures for the yellow mold liquefaction and ceramicization processes in the existing lost foam shell casting process. Utility Model Content

[0005] The purpose of this invention is to provide a liquefied ceramic chemical assembly for lost foam shell process, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a liquefied ceramic chemical fixture for lost foam casting process, comprising a fixture frame and a guide plate. The fixture frame includes a mounting frame and several vertical supports. The vertical supports are fixedly installed on the mounting frame, and the vertical supports form a placement cavity. Several mounting blocks are provided on the frame of the vertical supports. The several vertical supports are connected by connecting rods installed between the mounting blocks at the same distance from the mounting frame to form a mounting platform for placing the model. The guide plate is installed on the mounting frame, and at least part of its plate surface faces the model to form a guide part for guiding heat to the model.

[0007] Specifically, the vertical supports are fixedly installed on the mounting frame; the vertical supports are divided into two groups, and the two groups of vertical supports are installed parallel to each other on both sides of the mounting frame, with the vertical supports on both sides corresponding to each other.

[0008] Specifically, each set of vertical supports has at least two supports; two adjacent vertical supports on one side of the mounting frame and the corresponding two vertical supports on the other side form a model placement cavity; several model placement cavities are formed between the two sets of vertical supports.

[0009] Specifically, the mounting linkage includes a first linkage and a second linkage; a first linkage is installed between each set of vertical supports via mounting blocks; several second linkages are installed at intervals on the first linkages of the two vertical supports on both sides where the model placement cavity is located, to form a mounting platform.

[0010] Specifically, a first reinforcing rod is installed between two adjacent vertical supports in each set of vertical supports; a second reinforcing rod is installed between the vertical supports that are set one-to-one on both sides of the mounting frame.

[0011] Specifically, several mounting blocks are evenly distributed along the frame of the vertical support.

[0012] Specifically, the mounting block is fixedly installed on the vertical support by means of the block body and the vertical support being inclined upwards.

[0013] Specifically, lifting components are installed on the top of the vertical supports at both ends of the mounting frame.

[0014] Specifically, the tooling frame is made of heat-resistant steel.

[0015] Specifically, there is at least one guide plate, and the guide plate is set at an angle to the mounting bracket.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application utilizes a tooling frame and guide plates. The tooling frame includes a mounting frame and several vertical supports, with the vertical supports fixedly mounted on the mounting frame and forming a placement cavity between them. By setting several mounting blocks on the frame of the vertical supports, connecting rods can be installed between the mounting blocks at different heights of the vertical supports, thus forming a suspended mounting platform for placing models. This platform is suitable for placing models of different sizes, thereby reducing the manufacturing cost of the model tooling and improving product applicability. Furthermore, a guide plate is installed on the mounting frame, with at least a portion of its surface facing the model, forming a guide section to direct heat to the model. This allows heat to be directed to the model's heating dead zones during heating, ensuring uniform heating and complete combustion of the model, thereby increasing the yield of empty shell products.

[0018] 2. Based on the foregoing, the vertical supports of this application are vertically fixedly installed on the mounting frame; the several vertical supports are divided into two groups, and the two groups of vertical supports are installed parallel to each other on both sides of the mounting frame, with the vertical supports on both sides corresponding one-to-one. Each group of vertical supports in this application has at least two supports; two adjacent vertical supports on one side of the mounting frame and the corresponding two vertical supports on the other side form a model placement cavity; several model placement cavities are formed between the two groups of vertical supports. This increases the number of models that can be placed, thereby improving the production efficiency of empty shells.

[0019] 3. Based on the foregoing, the mounting blocks of this application are evenly distributed along the frame of the vertical support, and the mounting blocks are fixedly installed on the vertical support by means of an inclined upward structure between the block body and the vertical support. The mounting rods include first rods and second rods. A first rod is installed between each group of vertical supports through the mounting blocks. Several second rods are installed at intervals on the first rods of the two vertical supports on both sides where the model placement cavity is located, to form a suspended mounting platform. This allows for the quick installation of the first rod at a suitable height of the inclined support mounting frame when placing the yellow model, according to the specifications and dimensions of the yellow model. A second rod adapted to the shape of the model is then placed on the first rod to form an mounting platform for stable placement of the yellow model, improving model placement efficiency and reducing the production cycle.

[0020] 4. Based on the foregoing, the tooling frame of this application is made of heat-resistant steel to accommodate both the liquefaction furnace (300℃) and the porcelainization furnace (900℃), thereby reducing the production cost of the model tooling frame. Lifting components are installed on the top of the vertical supports at both ends of the mounting frame of this application to enable rapid lifting of the tooling frame during the liquefaction and porcelainization processes, thereby improving production efficiency.

[0021] 5. Based on the foregoing, the present application includes at least one guide plate, which is angled to the mounting frame. This allows for the appropriate number of guide plates to be set according to the number of models and the placement angle between the models and the heat source. The guide plates are then angled to the mounting frame, facilitating the adjustment of the guide plate's guiding angle for different heating dead angles and improving the model's heating effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the liquefied ceramic chemical assembly for the lost foam shell process in this embodiment;

[0023] Figure 2 This is a schematic diagram of the liquefied ceramic chemical assembly for the lost foam shell process in this embodiment (guide plate not shown).

[0024] Figure 3 This is a side view of the structure of the liquefied ceramic chemical assembly rack used in the lost foam shell process of this embodiment (the mounting rod is not shown). Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. For ease of description, in this embodiment, the heat sources of the liquefaction furnace and the vitrification furnace are located on the bottom sides of the furnace. Since the furnace is a sealed space, when the yellow mold is placed on the tooling rack, the hot air blown from the heat source mainly heats the sides and top of the mold, while the bottom of the yellow mold has a heating dead zone.

[0026] Please see Figures 1-3 This embodiment discloses a liquefied ceramic chemical fixture for lost foam shell process, including a fixture frame body and a guide plate 8. The fixture frame body includes a mounting frame 1 and ten vertical supports 2. The ten vertical supports are fixedly installed on the mounting frame 1, and the mounting frame has a rectangular structure. The vertical supports form a box-shaped placement cavity. Nine mounting blocks 3 are evenly installed on the frame body of the vertical supports at intervals of 100mm. The ten vertical supports are connected by connecting rods installed between the mounting blocks at the same distance from the mounting frame to form a mounting platform for placing the lost foam model. The guide plate 8 is installed on the mounting frame 1, and at least part of its plate surface faces the model to form a guide part for guiding heat to the model.

[0027] In this embodiment, the vertical supports are fixedly installed on the mounting frame, which forms the base plate of the tooling frame. The ten vertical supports are divided into two groups of five. The two groups of vertical supports are installed parallel to each other on both sides of the rectangular mounting frame, with each group corresponding to the other. In this embodiment, two adjacent vertical supports on one side of the mounting frame and the corresponding two vertical supports on the other side form a model placement cavity; four model placement cavities are formed between the two groups of vertical supports. Furthermore, in this embodiment, a first reinforcing rod 10 is installed between the vertical supports in each group; a second reinforcing rod 11 is installed between the corresponding vertical supports on both sides of the mounting frame to improve the overall load-bearing capacity and structural stability of the tooling frame.

[0028] Furthermore, the mounting linkage in this embodiment includes a first linkage 5 and a second linkage 6; the first linkage 5 is installed between each set of vertical supports via mounting blocks; two second linkages 6 are installed at intervals on the first linkages of the two vertical supports on both sides where the model placement cavity is located, to form a mounting platform.

[0029] In addition, the tooling frame in this embodiment is made of stainless steel. The stainless steel used in this embodiment can be grade 1.4837 or 1.4848. Since the heat sources of the liquefaction furnace and the ceramicizing furnace in this embodiment are located on both sides of the bottom of the furnace, the number of guide plates in this embodiment is set to two, with each guide plate 8 set at an angle to the mounting frame 1.

[0030] Working Principle: In this embodiment, the liquefied ceramic chemical mounting rack for lost foam casting hollow shell process is used by first installing a first connecting rod on the mounting block of the vertical support at the corresponding height, according to the specifications and dimensions of the yellow mold model. Then, two second connecting rods are installed parallel to each other on the first connecting rod where each mold cavity is located, forming a suspended mounting platform. Next, the yellow mold model is placed on the mounting platform. Then, a guide plate is installed at the bottom of the mounting rack, and the installation angle of the guide plate is adjusted according to the model to optimize heat conduction.

[0031] During the hoisting of the jig, to prevent displacement of the model during the hoisting process, pads and fixing ropes are used to assist in securing the model on the jig. After the jig is hoisted into the heating furnace, the pads and fixing ropes need to be removed to avoid obstructing the model's space and affecting the liquefaction and vitrification effects. Next, according to production requirements, the liquefaction and vitrification processes are carried out. Before pouring, the foam in the yellow mold is burned off, and the strength of the coating layer is increased to meet the requirements of empty shell pouring.

[0032] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A fixture for liquefied ceramic materials used in lost foam casting process, comprising a fixture body and a guide plate, characterized in that: The tooling frame includes a mounting frame and several vertical supports. The vertical supports are fixedly installed on the mounting frame, and the vertical supports form a placement cavity. Several mounting blocks are provided on the frame of the vertical supports. The vertical supports are connected by connecting rods installed between the mounting blocks at the same distance from the mounting frame to form a mounting platform for placing the model. The guide plate is installed on the mounting frame, and at least part of its plate surface faces the model to form a guide part for guiding heat to the model.

2. The liquefied ceramic chemical assembly for lost foam shell process according to claim 1, characterized in that: The vertical brackets are fixedly installed on the mounting frame; the vertical brackets are divided into two groups, and the two groups of vertical brackets are installed parallel to each other on both sides of the mounting frame, and the vertical brackets on both sides are set one-to-one.

3. The liquefied ceramic chemical assembly for lost foam shell process according to claim 2, characterized in that: Each set of vertical supports has at least two supports; two adjacent vertical supports on one side of the mounting frame and two corresponding vertical supports on the other side form a model placement cavity; several model placement cavities are formed between the two sets of vertical supports.

4. The liquefied ceramic chemical assembly for lost foam shell process according to claim 3, characterized in that: The mounting linkage includes a first linkage and a second linkage; a first linkage is installed between each set of vertical supports via mounting blocks; several second linkages are installed at intervals on the first linkages of the two vertical supports on both sides where the model placement cavity is located, to form the mounting platform.

5. A liquefied ceramic chemical assembly for lost foam casting process according to claim 2, characterized in that: A first reinforcing rod is installed between two adjacent vertical supports in each group; a second reinforcing rod is installed between the vertical supports that are arranged one-to-one on both sides of the mounting frame.

6. The liquefied ceramic chemical assembly for lost foam shell process according to claim 1, characterized in that: Several mounting blocks are evenly distributed along the frame of the vertical support.

7. A liquefied ceramic chemical assembly for lost foam casting process according to claim 1, characterized in that: The mounting block is fixedly installed on the vertical support by means of the block body and the vertical support being inclined upwards.

8. A liquefied ceramic chemical assembly for lost foam shell process according to claim 2, characterized in that: Lifting components are installed on the top of the vertical supports at both ends of the mounting frame.

9. A liquefied ceramic chemical assembly for lost foam shell process according to claim 1, characterized in that: The tooling frame is made of heat-resistant steel.

10. A liquefied ceramic chemical assembly for lost foam shell process according to claim 1, characterized in that: The number of guide plates is at least one, and the guide plates are set at an angle to the mounting bracket.

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