Dummy foot skin material suitable for testing carrier of Chinese and preparation method of foot

Abstract

The invention discloses a dummy foot skin material suitable for testing Chinese carriers, and the raw materials of the foot skin material comprise synthetic resin, biodegradable plastic PSM, calcium carbonate, diisononyl phthalate, epoxidized soybean oil, an antioxidant plasticizer and color oil; wherein the raw materials comprise the following components in parts by mass: 90-110 parts of biodegradable plastic; 0.5 to 1.5 parts of calcium carbonate; 80 to 100 parts of diisononyl phthalate, and 80 to 100 parts of diisononyl phthalate; 5 to 15 parts of epoxidized soybean oil; 3-6 parts of an antioxidant plasticizer; 10 to 15 parts of color oil; the skin made of the material can simulate the foot skin characteristics of Chinese people, is stable in performance, can accurately test collision test performance data conforming to the Chinese people, improves the safety protection performance of the head of the Chinese people in the collision process of vehicle accidents, can be used repeatedly, and is good in durability.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safety, and in particular relates to the manufacture of collision test dummies, and specifically to a skin material for the feet of a dummy used for testing vehicles for Chinese people and a preparation method of the feet. Background Art

[0002] The crash test dummy is an experimental instrument made of special materials based on the principles of ergonomics. It can replace the human body in collision experiments such as automobiles and rail transit, thereby simulating the injuries suffered by real people. The dummy can simulate human characteristics and can be used multiple times. The use of dummy testing can improve the safety performance of vehicles and other means of transportation.

[0003] The existing crash test dummies are mainly Hybrid III and THOR dummies, which are developed based on the size and biological characteristics of European and American bodies. However, there are differences between the human body characteristics of Chinese people and those of European and American people (for example, there are differences in size, weight and biological characteristics), which will be reflected in the material properties of crash test dummies. If the skin and structure of the feet of European and American dummies are used, the test data may not conform to the characteristics of Chinese people, making the various designs of the car not suitable for Chinese people, increasing potential safety risks. Among them, the foot is the most easily overlooked part of the human body, and the structure of the foot is also significantly different due to the differences in philtrum. The performance of the foot skin directly affects the safety protection performance that the foot may receive during the collision. At present, my country does not have a formula and process for the foot structure and skin manufacturing of crash test dummies.

[0004] Injuries to the human feet, ankles, and lower tibia during the testing of various types of vehicles cannot be ignored. For example, the brake and accelerator pedals can cause damage to the human feet in car accidents. Existing test dummies are based on European and American physical signs, such as the Hybrid and Thor dummies. The foot bones and biomechanical characteristics are different from those of Chinese people, and European and American standards cannot be fully adopted. Therefore, existing experiments need to be differentiated according to human differences, and a dummy suitable for Chinese physical signs is urgently needed to complete them. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an improved dummy foot skin material suitable for vehicle testing for Chinese people. The skin made of this material can simulate the characteristics of the head skin of Chinese people, has stable performance, can accurately test the collision test performance data that meets the requirements of Chinese people, and improve the safety protection performance of the feet of Chinese people during the collision process of vehicle accidents. It can also be used multiple times and has good durability.

[0006] The present invention also provides an improved method for preparing a foot for testing vehicles suitable for Chinese people.

[0007] In order to achieve the above object, a technical solution adopted by the present invention is: A dummy foot skin material for vehicle testing, wherein the raw materials of the foot skin material include synthetic resin, biodegradable plastic, calcium carbonate, diisononyl phthalate, epoxidized soybean oil, antioxidant plasticizer and color oil; Among them, in parts by mass, the raw materials include: 90-110 parts of biodegradable plastic Calcium carbonate 0.5-1.5 parts 80-100 parts of diisononyl phthalate Epoxidized soybean oil 5-15 parts 3-6 parts of antioxidant plasticizer Color oil 10-15 parts.

[0008] Preferably, the above-mentioned materials are used to prepare dummy foot skin and dummy feet, and the preparation method of the dummy feet is as follows: The first step is to make a dummy foot mold and combine them into a foot mold; The second step is to weigh the raw materials, weigh the raw materials according to the proportion, and mix the materials; The third step is to mix the raw materials and perform physical stirring; Step 4: Place the stirred raw materials into a mixing barrel and degas and stir for 20 minutes to confirm that no bubbles are generated in the mixed liquid; Step 5: Pour the raw material liquid into the mold made in the first step, and place the mold in a degassing barrel for degassing; Step 6: Place the degassed mold into the oven and bake for 100 minutes; Step 7: Take out the baked mold, cool it with water, take out the mold core, and complete the preparation.

[0009] Preferably, in the first step, the dummy foot mold needs to be cleaned inside during assembly and a release agent is applied to the inner surface.

[0010] Preferably, in the weighing process of the second step, the synthetic resin and the calcium carbonate material are first mixed and stirred with a wooden shovel, and then the color oil material is weighed and put into the synthetic resin for mixing; then the weighed diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer are mixed with each other.

[0011] Preferably, in the mixing of raw materials in the third step, the mixed solution of diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer is first packaged, and 1 / 6 of it is poured into the mixed material of synthetic resin and stirred. After stirring, 1 / 6 of the mixed solution is poured into it and stirred. When the liquid becomes granular, another 1 / 6 of the mixed solution is poured into it until it is evenly stirred.

[0012] Preferably, the stirred liquid is stirred electrically for 5-10 minutes and then the remaining mixed solution is poured in and stirred for no less than 2 minutes.

[0013] Preferably, after the raw material liquid is degassed, it is divided into two portions of equal weight, and white debris on the surface of the raw material liquid is removed.

[0014] Preferably, in the fifth step, a funnel is used when pouring the raw liquid into the mold. To prevent gas from entering the mold, the liquid should be poured along the edge of the funnel to allow the liquid to flow into the mold along the funnel. After the liquid is injected into the mold, the liquid level is located in the funnel above the mold opening, and the funnel and the mold are degassed together for 8 minutes.

[0015] Preferably, in the sixth step, the oven temperature is 160-180 degrees.

[0016] Preferably, in the seventh step, the mold is cooled by air cooling for not less than 30 minutes after water cooling.

[0017] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention innovatively uses specific amounts of calcium carbonate, diisononyl phthalate and epoxy soybean oil, antioxidant plasticizer and color oil materials for compounding on the basis of the commonly used skin material polyvinyl chloride resin, and at the same time changes the raw material of the synthetic resin from polyvinyl chloride resin to biodegradable plastic, which can effectively improve the degradability of the material and protect the environment, so that the manufactured foot skin material meets the characteristics of the Chinese head skin in terms of toughness, ductility, elasticity, etc., so that the vehicles such as cars designed for the Chinese can be specifically designed with reasonable data to improve the safety protection performance of the feet; at the same time, it can be used multiple times and has good durability. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with specific examples. It should be understood that these examples are used to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited by the following examples. The implementation conditions adopted in the examples can be further adjusted according to specific requirements, and the unspecified implementation conditions are generally the conditions in routine experiments. The raw materials used in the examples are all commercially available industrial products.

[0019] In the following examples, unless otherwise specified, all raw materials are basically purchased from commercial sources or prepared by conventional methods in the art. Example

[0020] This example provides a dummy foot skin material suitable for testing vehicles for Chinese people. The raw materials include, by weight: 100 pieces of biodegradable plastic 1 part calcium carbonate 99 parts of diisononyl phthalate Epoxidized soybean oil 11 parts 4 parts of antioxidant plasticizer 12 parts of color oil.

[0021] The preparation method is as follows: firstly, biodegradable plastic and calcium carbonate material are mixed to form synthetic resin, which is stirred by a wooden shovel, and then the color oil material is weighed and put into the synthetic resin for mixing; then the weighed diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer are mixed with each other.

[0022] First, divide the mixed solution of diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer into portions, pour 1 / 6 of it into the mixed material of synthetic resin and stir, then pour in 1 / 6 of the mixed solution and stir again. When the liquid becomes granular, pour in another 1 / 6 of the mixed solution until it is evenly stirred.

[0023] Stir the stirred liquid with an electric stirrer for 5-10 minutes, then pour in the remaining mixed solution and stir for no less than 2 minutes.

[0024] The skin material produced this time is used to make the dummy's foot; the stirred raw materials are placed in a mixing bucket for degassing and stirring for 20 minutes, and it is confirmed that no bubbles are generated in the mixed liquid; a funnel is used to pour the raw material liquid into the prepared mold, and the mold is placed in a degassing bucket for degassing for 8 minutes; the degassed mold is placed in an oven and baked at a baking temperature of 160-180 degrees for 100 minutes; the baked mold is taken out, cooled with water first, and then cooled with water for 30 minutes, and then the mold core is taken out to complete the preparation. Example

[0025] This example provides a dummy foot skin material suitable for testing vehicles for Chinese people. The raw materials include, by weight: 90 parts of biodegradable plastic 1.5 parts calcium carbonate 80 parts of diisononyl phthalate Epoxidized soybean oil 5 parts 3 parts of antioxidant plasticizer 10 parts of color oil.

[0026] The rest is the same as in Example 1. Example

[0027] This example provides a dummy foot skin material suitable for testing vehicles for Chinese people. The raw materials include, by weight: 110 pieces of biodegradable plastic 0.5 parts calcium carbonate 100 parts of diisononyl phthalate Epoxidized soybean oil 15 parts 6 parts of antioxidant plasticizer 15 parts of color oil.

[0028] The rest is the same as in Example 1.

[0030] After experiments, the performance results of the embodiment data adopted by the present invention are more inclined to the statistical mean of the Chinese people's foot skin test, which can more effectively reflect the skin reaction level of the Chinese people and contribute to the accuracy of the data obtained in the dummy experiment process.

[0031] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A dummy foot skin material suitable for testing vehicles for Chinese people, characterized in that: The raw material of the foot skin material is a synthetic resin, which includes biodegradable plastic, calcium carbonate, diisononyl phthalate, epoxidized soybean oil, antioxidant plasticizer and color oil; Among them, in parts by mass, the raw materials include: 90-110 parts of biodegradable plastic; Calcium carbonate 0.5-1.5 parts; 80-100 parts of diisononyl phthalate; Epoxidized soybean oil 5-15 parts; 3-6 parts of antioxidant plasticizer; Color oil 10-15 parts.

2. A dummy foot made of the dummy foot skin material suitable for testing vehicles for Chinese people according to claim 1, characterized in that: The preparation method of the dummy foot is as follows: The first step is to make a dummy foot mold and combine them into a foot mold; The second step is to weigh the raw materials, weigh the raw materials according to the proportion, and mix the materials; The third step is to mix the raw materials and perform physical stirring; Step 4: Place the stirred raw materials into a mixing barrel and degas and stir for 20 minutes to confirm that no bubbles are generated in the mixed liquid; Step 5: Pour the raw material liquid into the mold made in the first step, and place the mold in a degassing barrel for degassing; Step 6: Place the degassed mold into the oven and bake for 100 minutes; Step 7: Take out the baked mold, cool it with water, take out the mold core, and complete the preparation.

3. The method for preparing a dummy foot for testing a vehicle suitable for Chinese people according to claim 2, characterized in that: In the first step, the dummy foot mold needs to be cleaned inside and a release agent applied to the inner surface during assembly.

4. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 2, characterized in that: In the weighing process of the second step, the synthetic resin and calcium carbonate materials are first mixed and stirred with a wooden shovel, and then the color oil material is weighed and put into the synthetic resin for mixing; then the weighed diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer are mixed with each other, and then the third step of mixing the raw materials is carried out.

5. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 4, characterized in that: In the third step of mixing the raw materials, first divide the mixed solution of diisononyl phthalate, epoxy soybean oil and antioxidant plasticizer into portions, pour 1 / 6 of it into the mixed material of synthetic resin and stir, then pour 1 / 6 of the mixed solution into the mixture and stir, and when the liquid becomes granular, pour another 1 / 6 of the mixed solution into the mixture until it is evenly stirred.

6. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 5, characterized in that: Stir the stirred liquid with an electric stirrer for 5-10 minutes, then pour in the remaining mixed solution and stir for no less than 2 minutes.

7. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 2, characterized in that: In the fourth step, after the raw material liquid is degassed, it is divided into two portions of equal weight, and the white debris on the surface of the raw material liquid is removed.

8. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 2, characterized in that: In the fifth step, a funnel is used to pour the raw liquid into the mold. To prevent gas from entering the mold, the liquid should be poured along the edge of the funnel to allow the liquid to flow into the mold along the funnel. After the liquid is injected into the mold, the liquid level is in the funnel higher than the mold mouth. The funnel and the mold are degassed together for 8 minutes.

9. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 2, characterized in that: In step 6, the oven temperature is 160-180 degrees.

10. The method for preparing a dummy foot for vehicle testing suitable for Chinese people according to claim 2, characterized in that: In the seventh step, the mold is cooled by air cooling for no less than 30 minutes after water cooling.