CN111454486A

CN111454486A - Inert demolding material

Info

Publication number: CN111454486A
Application number: CN202010280845.6A
Authority: CN
Inventors: 秦能; 魏宗亮; 李萌; 张文辉; 刘晶; 谢中元
Original assignee: Xian Modern Chemistry Research Institute
Current assignee: Xian Modern Chemistry Research Institute
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-28

Abstract

The invention discloses an inert demolding material which can be used as a cleaning material after the charging of a quality material in continuous kneading and continuous compression molding production is finished; the inert demolding material can also be used as a material for installation, debugging and trial operation before formal production of new equipment and a new process, and consists of an inert adhesive, an inert plasticizer, an oxide and an energetic material simulant. The mold stripping material has strong adaptability and can simulate real gunpowder materials.

Description

Inert demolding material

Technical Field

The invention relates to an inert material, in particular to an inert demolding material which is mainly used for demolding materials after continuous kneading and continuous press-stretching forming and materials used in the test operation of new equipment and new technology.

Background

In the continuous kneading and continuous extruding (including spiral extruding and hydraulic extruding) molding process of explosives and powders, after the charging of the quality materials is finished, if the continuous kneading machine is stopped, the chambers and the continuous extruding molds of the continuous kneading machine can be filled with dangerous and high-sensitivity energetic materials, and the cleaning of the materials is very dangerous work. Typically, demould materials are used to solve this problem. And after the feeding of the positive material is finished, adding a demolding material, replacing the positive material in the cavity and the mold with the demolding material, taking out the less dangerous demolding material from the cavity and the mold by an operator, and cleaning.

The traditional demolding material contains energy-containing components such as Nitrocellulose (NC), trinitrotoluene (TNT) and the like, and has safety risk in actual use; on the other hand, trinitrotoluene has been proven by medical studies to be a strong carcinogen.

In the process of researching and developing a new process or building new explosive production equipment, material tests are required, and under the condition that the equipment is not adjusted to a normal working state, energetic raw materials are directly used for tests, so that the safety risk is high. Therefore, the general method is to replace real materials with non-energetic simulants, so as to reduce the danger. Another great function of the stripping material is to act as a mimic of energetic materials.

The traditional energetic material simulant still contains energetic material Nitrocellulose (NC) (document 1, development of Korean, Zhukai jin, Chenya Li modified double-base propellant substitute, solid rocket technology [ J ],2011,4(34): 478-.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an inert stripping material which is free of energetic materials, active metal powder and energetic benzene-containing plasticizers, does not have safety risks in equipment debugging and is harmless to human bodies.

In order to solve the technical problem, the invention discloses an inert demolding material which is composed of 24% of inert adhesive, 42% of inert plasticizer, 34% of oxide and energetic material simulant.

The inert binder is one or a mixture of cellulose acetate and cellulose acetate butyrate;

the inert plasticizer is one of glycerol triacetate and dioctyl adipate or a mixture of the glycerol triacetate and the dioctyl adipate;

the oxide and energetic material simulant is one or a mixture of calcium carbonate and gypsum powder;

the invention relates to a preferable scheme of a demolding material, which comprises the following components in percentage by weight:

the invention has the beneficial effects that:

the inert demolding material disclosed by the invention is free of energetic materials (such as nitrocellulose and trinitrotoluene) and inactive metal powder (such as aluminum powder), the energetic materials are completely replaced by non-energetic materials, and the substitutes are harmless to human health. The application range of the demould material is wide, and the density of the demould material can be 1.4g/cm³～1.7g/cm³And (4) adjusting. Can be used for safely cleaning a cavity and a die in the continuous kneading and continuous stretching processes; it can also be used to replace energetic materials for new process tests and new equipment debugging.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example 1

This example was carried out with reference to the following weight percent compositions:

preparation of this example

The embodiment is used for casting molding of the casting equipment. And weighing and mixing. The specific operation process is as follows:

a. weighing machine

The components of the simulant are respectively weighed according to the weight percentage of the embodiment 1, 1.8kg of cellulose acetate, 0.6kg of cellulose acetate butyrate, 2.2kg of glycerol triacetate, 2kg of dioctyl adipate, 2.8kg of calcium carbonate and 0.6kg of gypsum powder.

b. Mixing

And (3) pouring the weighed materials into a kneading pot, closing the cover of the kneading pot, starting a stirring paddle to operate for 60-90min, stopping the machine, discharging, and demolding.

Under the working condition that the die stripping material is needed, the die stripping material is adopted.

Example 2

this example was used for the continuous kneading process test by pouring cellulose acetate into hopper 1, calcium carbonate into hopper 2, triacetin into tank 1, and dioctyl adipate into tank 2. The solid material metering and feeding device is connected below the feeding hopper, the materials in the tank body are connected with the peristaltic metering pump through a pipeline, the continuous kneader is started, the process parameters are adjusted to required values, the solid material metering and feeding device and the peristaltic pump are started, a control program is started, the feeding speed of each material is set according to the formula proportion of the demolding materials, the feeding is started, and each material is continuously fed to the continuous kneader according to the set speed.

Claims

1. The inert demolding material is characterized by consisting of 24 wt% of inert binder, 42 wt% of inert plasticizer, 34 wt% of oxide and energetic material simulant.

2. The inert release material of claim 1, wherein the inert binder is one or a mixture of cellulose acetate, cellulose acetate butyrate.

3. The inert stripping material as claimed in claim 1, wherein the inert plasticizer is one or a mixture of glycerol triacetate and dioctyl adipate.

4. The inert demold material according to claim 1, wherein the oxide and energetic material simulant is one or a mixture of calcium carbonate and landplaster.

5. The inert stripping material as claimed in claim 1, wherein the components and weight percentages are as follows: