Modeling method applied to ankle civilian goods

Abstract

The invention provides a method applied to mold assembling of ankle civil goods, and belongs to the technical field of titanium and titanium alloy casting. The problems of how to reduce the heat of the product as much as possible and save the waste of main materials in the production process are solved. The structure comprises A-class group trees and B-class group trees, the A-class group trees are formed by symmetrically grouping five wax molds on the two sides of a test bar, the B-class group trees are formed by symmetrically grouping three wax molds on the two sides of the test bar, the A-class group trees are installed and welded on the two sides of a horizontal pouring gate on the upper layer, and the B-class group trees are installed and welded on the two sides of a horizontal pouring gate on the middle layer and the two sides of a horizontal pouring gate on the lower layer respectively. And 2, the longitudinal space is fully utilized on the pouring gate in a tree assembling manner to assemble the ankle shell, so that the longitudinal space of the module can be almost ensured not to be wasted, each module can complete the production of more castings at one time, and the production furnace times of ankle nail and ankle shell series civil products in batch production can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of titanium and titanium alloy casting, and in particular relates to a method for assembling a mold for ankle-like civilian products. Background Art

[0002] The casting technology of titanium and titanium alloys has gradually extended to the civilian field and has been widely used in artificial joint implantation technology.

[0003] Artificial joints can replace part of the damaged ankle joint structure to support the body weight. When the human body is standing, walking or exercising, the body weight is evenly distributed to the feet, just like a sturdy bracket, preventing excessive local pressure from causing damage to other tissues of the foot. Moreover, it can cooperate with other parts to provide good stability and mobility for the ankle joint, allowing people to complete flexion and extension, inversion and eversion and other movements more naturally, restore the normal physiological function of the ankle joint as much as possible, and reduce the pain and movement disorders caused by ankle joint lesions or injuries. Titanium alloys are very suitable for providing better life guarantees for people with joint lesions due to their high specific strength and corrosion resistance. Therefore, the demand for castings such as ankle nails and ankle shells is increasing.

[0004] However, the cost of titanium alloy materials will increase due to its long manufacturing cycle and the many processes involved. The amount of invalid metal that must be added to the shell weight gain, pouring cup residue, etc. during the smelting and pouring process is also a necessary component of the cost. For each furnace of titanium alloy product smelting and pouring, it is necessary to increase the amount of metal such as shell weight gain and pouring cup residue by no less than 40kg on the basis of the amount of metal that must be consumed by the pouring system. Therefore, after the production quantity of each batch of titanium alloy castings is confirmed, minimizing the number of furnaces of products while completing the production task will greatly save the waste of main materials during the production process. Fully utilizing the space utilization of each module in each furnace is the most direct and effective way to improve metal utilization and reduce costs. Summary of the invention

[0005] In view of this, in order to solve the problem of how to reduce the number of furnaces of products and save the waste of main materials during the production process mentioned in the above background technology, the present invention proposes a method for assembling molds for ankle-type civilian products.

[0006] To achieve the above object, the present invention adopts the following technical solution: a method for forming a model of ankle products, specifically comprising the following steps:

[0007] Step 1: Design a type A group tree and a type B group tree, where the type A group tree is symmetrically arranged on both sides of the test rod, with 5 wax models in each group, and the type B group tree is symmetrically arranged on both sides of the test rod, with 3 wax models in each group;

[0008] Step 2: Weld several type A trees together on both sides of the horizontal runner of the upper layer, and weld several type B trees together on both sides of the horizontal runner of the middle and lower layers respectively.

[0009] Furthermore, a plurality of Class A group trees are arranged in parallel, and there are 16 Class A group trees arranged.

[0010] Furthermore, a plurality of B-type group trees are arranged in parallel, and there are 16 B-type group trees arranged.

[0011] Furthermore, a plurality of type A group trees and type B group trees are vertically connected to the horizontal runner.

[0012] Furthermore, the runner includes a vertical runner and a plurality of horizontal runners, and the horizontal runners are symmetrically welded on both sides of the vertical runner.

[0013] Furthermore, the horizontal runner is divided into three layers, namely an upper layer, a middle layer and a lower layer.

[0014] Compared with the prior art, the method for forming ankle products according to the present invention has the following beneficial effects:

[0015] 1. The present invention discloses a novel titanium alloy small-sized civilian product die assembly scheme. The scheme designs a reasonable auxiliary pouring system according to the shape characteristics of the product, and finally realizes the full utilization of the module space. Without affecting the product quality, it not only improves the utilization rate of the pouring metal, but also saves other materials, depreciation, and labor costs, which provides a good theoretical reference for the subsequent die assembly technology of small and medium-sized titanium alloy castings.

[0016] 2. The present invention fully utilizes the longitudinal space on the runner to assemble the ankle shell in a "tree-like" manner, which can almost ensure that the longitudinal space of the module will not be wasted. Each module can complete the production of more castings at one time, which can reduce the production furnace times of mass-produced ankle nails and ankle shell series civilian products.

[0017] 3. The module assembly scheme proposed in the present invention can make timely corresponding fine adjustments to the specific module assembly scheme of the current batch according to the number of batch production orders of ankle products each time, and will not limit each module assembly scheme due to the solidification of the scheme, which will bring greater difficulty to the module assembly scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is a schematic structural diagram of the ankle nail of the present invention;

[0020] Figure 2Schematic structural diagram of the ankle nail group mold after being grouped according to the prior art;

[0021] Figure 3 Schematic structural diagram of several grouped molds of the present invention forming a grouped mold tree;

[0022] Figure 4 Schematic structural diagram of the A - type grouped tree of the present invention;

[0023] Figure 5 Schematic structural diagram of the B - type grouped tree of the present invention;

[0024] Figure 6 Schematic structural diagram of the assembled finished product of the present invention;

[0025] In the figure: 1 - longitudinal runner, 2 - horizontal runner, 3 - test bar. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] See Figure 1-6 To illustrate this implementation mode, a method applied to the grouped mold of ankle - type civilian products is as follows: 1. Specifically, it includes the following steps:

[0028] Step 1: Design the A - type grouped tree and the B - type grouped tree. Among them, for the A - type grouped tree, 5 pieces of wax molds are symmetrically grouped on both sides of the test bar 3, and for the B - type grouped tree, 3 pieces of wax molds are symmetrically grouped on both sides of the test bar 3;

[0029] Step 2: Group - weld several A - type grouped trees on both sides of the upper - layer horizontal runner 2, and group - weld several B - type grouped trees on both sides of the middle - layer and lower - layer horizontal runners 2 respectively.

[0030] Several A - type grouped trees are arranged in parallel, and several B - type grouped trees are arranged in parallel. Both the A - type grouped tree and the B - type grouped tree are set to 16.

[0031] Several A - type grouped trees and B - type grouped trees are perpendicularly connected to the horizontal runner 2.

[0032] The runner includes a vertical runner 1 and several horizontal runners 2. The vertical runner 1 is symmetrically welded with horizontal runners 2 on both sides. The horizontal runner 2 is divided into three layers, namely the upper layer, the middle layer and the lower layer, similar to the character "丰" (abundant).

[0033] Example 1:

[0034] There are various ankle - type civilian products applied to the field of artificial joints, such as ankle nails, ankle shells, etc. The present invention mainly takes ankle nails as an example to introduce the specific implementation method of the present invention scheme.

[0035] like Figure 1 The ankle nail is mainly composed of a ring and a short rod, and its overall dimensions are approximately 26mm×12mm×6mm.

[0036] like Figure 2 If the ankle nail is molded directly on the horizontal runner 2, only 56 wax molds can be welded on each layer, and the number of each module is 56×3=168. Each furnace 4 castings are completed by 4 modules, that is, each furnace can cast 168×4=672 pieces. The theoretical weight of the module of this mold assembly scheme is 13.4kg, and the metal amount of 4 modules is 13.4×4=53.6kg. The metal amount of the pot shell weight increase, pouring cup residue, etc. is calculated as 53.6+40=93.6kg based on 40kg. The titanium alloy recycling ingot is about 60 yuan per kilogram, and the main material is 93.6kg×60=5616. The labor cost, water and electricity cost and equipment depreciation cost of a single furnace are about 3,000 yuan in total, and the total casting cost is about 8616 yuan. The casting cost of a single product is 8616 / 672=12.8 yuan.

[0037] like Figure 3 If the module assembly scheme described in the present invention is used for module assembly, there will be a lot of idle space in the upper, middle and lower layers of the module. If the module assembly scheme can be improved and the vertical space in the black circle in the figure is fully utilized, the number of products put into production of each module can be increased.

[0038] like Figure 4 , Figure 5 In order to make full use of the longitudinal space of the module, the ankle nail casting can be welded to the test rod 3 in a tree-like manner. Figure 4 The modeling method is to group 5 wax models on both sides of the test rod 3, that is, 10 wax models for each tree. This method is recorded as "Type A tree group"; the idle space of the middle and lower layers of the module is small, so it can be divided into two groups according to the number of wax models. Figure 5 The modeling method is to group 3 wax models on both sides of the test rod 3, that is, 6 wax models for each tree. This method is recorded as "Type B group tree".

[0039] like Figure 6 ,Will Figure 4 The "Class A Group Tree" shown and Figure 5 The "B-type group trees" shown are welded on the upper layer and the middle and lower layers of the horizontal runner 2. According to this scheme, 16 "A-type group trees" can be welded on the upper layer, with a total of 16×10=160 wax models, and 16 "B-type group trees" can be welded on the middle and lower layers, with a total of 32 trees, and a total of 32×6=192 wax models. The total number of module wax models is 160+192=352. Figure 2The casting cost of ankle nails in the mold assembly scheme is calculated by the following method: the number of products in each furnace is 352×4=1408 pieces, the total metal amount is 20.3kg (theoretical weight of module)×4 (number of modules)+40kg (metal amount such as increased weight of pot shell and residual in pouring cup)=121.2kg, the cost of a single furnace is 121.2kg (metal amount)×60 yuan / kg (unit price of recycled ingots)+3000 yuan (cost of water, electricity, equipment depreciation and labor, etc.)=10272 yuan, and the casting cost of a single product is 10272 / 1048=9.8 yuan.

[0040] In summary, by assembling the mold according to the scheme of the assembly tree, the cost of a single ankle nail production can save 12.8-9.8=3 yuan in the casting stage alone. Calculated based on the annual batch production quantity of 10,000 pieces, the cost can be saved at least 30,000 yuan. The present invention only uses the ankle nail as an example to demonstrate the feasibility and effectiveness of this scheme. If this scheme is extended horizontally to other ankle products, it will save more costs in the manufacture of products in this field.

[0041] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A method for molding ankle products, characterized in that: The specific steps include: Step 1: Design a type A group tree and a type B group tree, wherein the type A group tree is a group of 5 wax models symmetrically arranged on both sides of the test rod (3), and the type B group tree is a group of 3 wax models symmetrically arranged on both sides of the test rod (3); Step 2: Weld a number of type A trees to both sides of the upper horizontal runner (2), and weld a number of type B trees to both sides of the middle and lower horizontal runners (2).

2. The method for forming a model of ankle products according to claim 1, characterized in that: Several Class A group trees are set up in parallel.

3. The method for forming a model of ankle products according to claim 2, characterized in that: There are 16 type A group trees.

4. The method for forming a model of ankle products according to claim 1, characterized in that: Several B-type group trees are set up in parallel.

5. The method for forming a model of ankle products according to claim 3, characterized in that: There are 16 type B group trees.

6. The method for forming a model of ankle products according to claim 1, characterized in that: A plurality of type A group trees and type B group trees are vertically connected to the horizontal runner (2).

7. The method for forming a model of ankle products according to claim 1, characterized in that: The runner comprises a vertical runner (1) and a plurality of horizontal runners (2), and the horizontal runners (2) are symmetrically welded on both sides of the vertical runner (1).

8. The method for forming a model of ankle products according to claim 1, characterized in that: The horizontal runner (2) is divided into three layers, namely an upper layer, a middle layer and a lower layer.

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