CN114525009A

CN114525009A - Impact-resistant ABS resin composite plastic, preparation method thereof and microphone made of plastic

Info

Publication number: CN114525009A
Application number: CN202210157423.9A
Authority: CN
Inventors: 韩韶峰; 文辉; 王新亮; 周高莹; 周元东
Original assignee: Hunan Jieli Tai Technology Co ltd
Current assignee: Hunan Jieli Tai Technology Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-05-24
Anticipated expiration: 2042-02-21
Also published as: CN114525009B

Abstract

The application relates to the field of microphone production technology, and particularly discloses an anti-impact ABS resin composite plastic, a preparation method thereof and a microphone made of the plastic. The impact-resistant ABS resin composite plastic comprises the following raw materials in parts by weight: 70-100 parts of ABS resin, 5-15 parts of thermoplastic polyurethane, 20-38 parts of modifier and 3-7 parts of auxiliary agent, wherein the modifier comprises a toughening agent, a filler and a plasticizer, and the weight ratio of the toughening agent to the filler to the plasticizer is 7-15: 10-20: 3; the preparation method comprises the following steps: the ABS resin, the thermoplastic polyurethane, the modifier and the auxiliary agent are uniformly mixed, and the mixture is melted and granulated by a screw extruder to prepare the composite plastic. The impact-resistant ABS resin composite plastic can be used for preparing microphone connecting pipes, and has the advantages of improving the impact resistance of the connecting pipes and reducing the damage of the connecting pipes; in addition, the preparation method has the advantage of simplicity and convenience in operation.

Description

Impact-resistant ABS resin composite plastic, preparation method thereof and microphone made of plastic

Technical Field

The application relates to the field of microphone production technology, in particular to an anti-impact ABS resin composite plastic, a preparation method thereof and a microphone made of the plastic.

Background

The microphone is called a microphone, and is an energy conversion device for converting a sound signal into an electric signal, and is also called a microphone or a microphone. Microphones are classified into moving coil, condenser, electret and recently emerging silicon micro-microphones, in addition to liquid microphones and laser microphones.

In the related art, the chinese patent application with publication number CN107707999A discloses a wireless microphone, which includes a straight cylindrical main body for holding and a microphone connected to the top end of the main body, the main body includes a support, a battery compartment for placing a battery is provided on the support, a connecting pipe is sleeved on the support, the connecting pipe is in threaded connection with the microphone, one end of the connecting pipe far away from the microphone is in threaded connection with a tail sleeve, and the tail sleeve covers the battery compartment. When the microphone needs to be replaced, the microphone is screwed to be separated from the connecting pipe, and the microphone can be replaced. The existing connecting pipe is usually made of metal or ABS plastic, and the metal has higher heat conductivity than the ABS plastic, and particularly, the metal connecting pipe in northern areas of China has lower temperature than the ABS plastic connecting pipe and is not suitable for holding, so the ABS plastic connecting pipe is frequently selected.

With respect to the above-described related art, the inventors consider that: when the microphone is replaced, the connecting pipe is easy to slip and fall off from the support, so that the connecting pipe is damaged, and the normal use of the microphone is influenced.

Disclosure of Invention

In order to improve the shock resistance of the connecting pipe and reduce the damage of the connecting pipe, the application provides the shock-resistant ABS resin composite plastic, the preparation method thereof and the microphone made of the plastic.

In a first aspect, the application provides an impact-resistant ABS resin composite plastic, which adopts the following technical scheme:

an impact-resistant ABS resin composite plastic comprises the following raw materials in parts by weight: 70-100 parts of ABS resin, 5-15 parts of thermoplastic polyurethane, 20-38 parts of a modifier and 3-7 parts of an auxiliary agent, wherein the modifier comprises a toughening agent, a filler and a plasticizer, and the weight ratio of the toughening agent to the filler to the plasticizer is 7-15: 10-20: 3.

By adopting the technical scheme, the thermoplastic polyurethane and the toughening agent effectively improve the toughness of the plastic, meanwhile, the filler is combined with the toughening agent to effectively improve the rigidity of the plastic, the degree of rigidity reduction caused by the addition of the thermoplastic polyurethane and the toughening agent is reduced, and the plasticizer improves the stability of the toughening agent and the filler in the plastic by improving the plasticity of the plastic, so that the toughness of the plastic is further improved, and the impact resistance of the plastic is improved.

Preferably, the filler comprises nano vanadium carbide powder and mullite whiskers, and the weight ratio of the nano vanadium carbide powder to the mullite whiskers is 1: 1-3.

By adopting the technical scheme, the nano vanadium carbide powder and the mullite whisker are filled in the plastic, so that the impact resistance of the plastic is improved.

Preferably, the plasticizer is chlorinated paraffin.

By adopting the technical scheme, the chlorinated paraffin has a lubricating effect on the mixing of the raw materials on one hand, so that the raw materials are mixed more uniformly, and on the other hand, the plasticity of the plastic is improved, and the stability of the nano vanadium carbide powder and the mullite whisker in the plastic is improved, so that the impact resistance of the plastic is improved.

Preferably, the weight ratio of the toughening agent to the nano vanadium carbide powder to the mullite whisker to the chlorinated paraffin is 11:5:10: 3.

By adopting the technical scheme, the proportion of the toughening agent, the nano vanadium carbide powder, the mullite whisker and the chlorinated paraffin is selected, so that the impact resistance of the plastic is further improved.

Preferably, the ABS resin composition further comprises nylon and a compatilizer, wherein the mass ratio of the nylon to the compatilizer is 5:1, and the weight ratio of the ABS resin to the thermoplastic polyurethane to the nylon is 14-20: 1-3: 1.

By adopting the technical scheme, the compatilizer is used for mixing the nylon, the ABS resin and the thermoplastic polyurethane, so that the moisture absorption performance of the plastic is improved, and the impact resistance of the plastic is further improved.

Preferably, the coating also comprises diatomite, wherein the weight ratio of the diatomite to the nylon is 5: 1-2.

By adopting the technical scheme, the diatomite is filled in the plastic as the moisture absorption filler, so that the moisture absorption performance of the plastic is further enhanced.

Preferably, the auxiliary agent comprises an antioxidant and a lubricant, and the weight ratio of the antioxidant to the lubricant is 2-4: 1-3.

By adopting the technical scheme, the addition of the antioxidant and the lubricant improves the mixing uniformity of the raw materials, and simultaneously reduces the damage of oxidation to plastics.

In a second aspect, the application provides a preparation method of an impact-resistant ABS resin composite plastic, which adopts the following technical scheme:

a preparation method of impact-resistant ABS resin composite plastic comprises the following steps: the ABS resin, the thermoplastic polyurethane, the modifier and the auxiliary agent are uniformly mixed, and the mixture is melted and granulated by a screw extruder to prepare the composite plastic.

By adopting the technical scheme, the composite plastic is prepared by mixing the raw materials and then extruding the mixture by a screw extruder, and the operation is simple and convenient.

In a third aspect, the present application provides a microphone made of the above plastic, and adopts the following technical solutions: the utility model provides a microphone, includes the main part, be provided with the battery compartment that is used for placing the battery in the main part, shown main part one end is fixed with the miaow head, the main part is close to miaow head one end fixedly connected with protection casing, the cover is equipped with the connecting pipe that is used for covering the battery compartment in the main part, the connecting pipe is moulded plastics by foretell composite plastic and is formed, miaow head one end threaded connection has the tail cover is kept away from to the main part, tail cover and connecting pipe butt.

Through adopting above-mentioned technical scheme, use the connecting pipe to cover the battery compartment, increase connecting pipe length and shorten tail cover length, increase above-mentioned composite plastic's coverage area, thereby the connecting pipe moisture absorption further improves its toughness.

In summary, the present application has the following beneficial effects:

1. the thermoplastic polyurethane and the toughening agent effectively improve the toughness of the plastic, and simultaneously, the filler is combined with the toughening agent to effectively improve the rigidity of the plastic, so that the rigidity reduction degree caused by the addition of the thermoplastic polyurethane and the toughening agent is reduced, and the plasticizer improves the stability of the toughening agent and the filler in the plastic by improving the plasticity of the plastic, so that the toughness of the plastic is further improved, and the impact resistance of the plastic is improved.

2. According to the application, the nano tungsten carbide powder and the mullite whisker are used as fillers and then are matched with the toughening agent and the plasticizer, so that the rigidity and toughness of the plastic are balanced, and the size stability and the impact resistance of the plastic are effectively improved.

3. Nylon and diatomaceous earth are taken as hygroscopic material in this application, and after this plastics made the connecting pipe, the staff perspired and is absorbed to further improve plastics toughness.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment 54 of the present application;

FIG. 2 is a partial schematic structural view of an embodiment 54 of the present application, which is mainly used for showing a bracket;

fig. 3 is a schematic sectional view of a part of the structure of an embodiment 54 of the present application, which is mainly used for showing a connecting pipe.

Description of reference numerals: 1. a main body; 11. a support; 111. a second positioning groove; 112. a groove; 12. connecting blocks; 2. a battery compartment; 3. a microphone; 4. a protective cover; 5. a connecting assembly; 51. a limiting ring; 52. a positioning ring; 521. a first positioning groove; 53. a first positioning block; 54. a second positioning block; 6. a connecting pipe; 61. a limiting groove; 7. and (4) a tail sleeve.

Detailed Description

The ABS resin is PA-7579003-56-9 thermoplastic, the thermoplastic polyurethane type is German BASF TPU C95A, the nylon is PA6 and the manufacturer BASF brand HFX 37, the compatilizer is PA compatilizer purchased from Yino chemical technology Co., Ltd, Guangzhou, the diatomite is powder and 325 meshes, the flexibilizer is thermoplastic styrene butadiene rubber, the particle size of the nano vanadium carbide powder is 800nm, the mullite whisker is 100nm in diameter and 8 mu m in length, the chlorinated paraffin is chlorinated paraffin-70 #, the powder is 200 meshes, the antioxidant is BASF antioxidant Irganox1010, and the lubricant is polyethylene wax.

The present application will be described in further detail with reference to the following drawings and examples.

Examples

Example 1

70kg of ABS resin, 5kg of thermoplastic polyurethane, 7kg of toughening agent, 5kg of nano vanadium carbide powder, 5kg of mullite whisker, 3kg of chlorinated paraffin, 2kg of antioxidant and 1kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 2

70kg of ABS resin, 5kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 3

70kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 4

70kg of ABS resin, 15kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 5

85kg of ABS resin, 5kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 6

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 7

85kg of ABS resin, 15kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 8

100kg of ABS resin, 5kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 9

100kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 10

100kg of ABS resin, 15kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 11

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 5kg of nano vanadium carbide powder, 5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 12

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 3.3kg of nano vanadium carbide powder, 6.7kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 13

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 2.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 14

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 7.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 15

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 16

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 3.75kg of nano vanadium carbide powder, 11.25kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 17

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 10kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 18

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 6.7kg of nano vanadium carbide powder, 13.3kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 19

85kg of ABS resin, 10kg of thermoplastic polyurethane, 7kg of toughening agent, 5kg of nano vanadium carbide powder, 15kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 20

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 21

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 3.3kg of nano vanadium carbide powder, 6.7kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 22

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 2.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 23

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 7.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 24

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 3.75kg of nano vanadium carbide powder, 11.25kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 25

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 10kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 26

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 6.7kg of nano vanadium carbide powder, 13.3kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 27

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 15kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 28

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 5kg of nano vanadium carbide powder, 5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 29

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 3.3kg of nano vanadium carbide powder, 6.7kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 30

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 2.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 31

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 7.5kg of nano vanadium carbide powder, 7.5kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 32

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 33

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 3.75kg of nano vanadium carbide powder, 11.25kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 34

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 10kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 35

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 6.7kg of nano vanadium carbide powder, 13.3kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 36

85kg of ABS resin, 10kg of thermoplastic polyurethane, 15kg of toughening agent, 5kg of nano vanadium carbide powder, 15kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 37

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 20kg of nano vanadium carbide powder, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the double-screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 38

Uniformly mixing 85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 20kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant, putting the mixture into a double-screw extruder, blending and granulating, controlling the rotating speed of the screw extruder to be 600-800 rpm, the extrusion temperature to be 240-280 ℃ and the pressure to be 2-4 MPa, and melting, extruding and granulating to obtain the composite plastic.

Example 39

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 2kg of antioxidant and 1kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 40

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 2kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

EXAMPLE 41

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 2kg of antioxidant and 3kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 42

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 1kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 43

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 3kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 44

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 4kg of antioxidant and 1kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 45

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 4kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 46

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 4kg of antioxidant and 3kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 47

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 1kg of compatilizer, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 48

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 2kg of compatilizer, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 49

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 3kg of compatilizer, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 50

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 1kg of compatilizer, 1kg of diatomite, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 51

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 1kg of compatilizer, 1.5kg of diatomite, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 52

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nylon, 1kg of compatilizer, 2kg of diatomite, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending and granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 53

100kg of ABS resin, 15kg of thermoplastic polyurethane, 15kg of toughening agent, 5kg of nano vanadium carbide powder, 15kg of mullite whisker, 3kg of chlorinated paraffin, 4kg of antioxidant and 3kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Example 54

The embodiment discloses a microphone, refer to fig. 1 and fig. 2, including main part 1, and main part 1 one end is provided with miaow head 3, is provided with battery compartment 2 on the main part 1, has placed the battery in the battery compartment 2, places the battery compartment 2 and the miaow head 3 electricity of battery and is connected. The main body 1 is provided with a connecting pipe 6 for covering the battery compartment 2 through a connecting component 5, and the connecting pipe 6 is formed by injection molding of any one of the composite plastics of embodiments 1 to 53. The end of the main body 1 far away from the microphone 3 is connected with a tail sleeve 7 through screw threads.

Referring to fig. 1 and 2, the main body 1 includes a bracket 11, the microphone 3 is fixedly connected to one end of the bracket 11 in the length direction, the bracket 11 is fixedly connected to the protective cover 4 near one end of the microphone 3, and the protective cover 4 covers the microphone 3. The side wall of the bracket 11 is provided with a groove 112, and the battery compartment 2 is fixedly connected in the groove 112. On support 11 was located to the coaxial cover of connecting pipe 6, support 11 kept away from 3 one end fixedly connected with connecting block 12 of miaow head, and 7 threaded connection of tail cover are on connecting block 12, and 7 butt of tail cover and connecting pipe 6 butts.

Referring to fig. 2 and 3, the connecting assembly 5 includes a limiting ring 51 coaxially and fixedly connected to one end of the side wall of the bracket 11 close to the microphone 3, and one end of the connecting pipe 6 far away from the tail sleeve 7 is abutted against the limiting ring 51. The positioning ring 52 is coaxially and fixedly connected to one side of the limiting ring 51 facing the connecting pipe 6, a limiting groove 61 is formed in the inner wall of one end, close to the limiting ring 51, of the connecting pipe 6, and the positioning ring 52 slides into the limiting groove 61. The first locating piece 53 of polylith of spacing groove 61 inner wall fixedly connected with, the first locating piece 53 of polylith uses the holding ring 52 axis to set up as centre of a circle circumference, has seted up first locating groove 111 corresponding first locating piece 53 on the holding ring 52, and first locating piece 53 slides in first locating groove 111. One end of the connecting pipe 6 close to the tail sleeve 7 is fixedly connected with a plurality of second positioning blocks 54, the plurality of second positioning blocks 54 are circumferentially arranged by taking the axis of the positioning ring 52 as the center of a circle, one end of the bracket 11 close to the tail sleeve 7 is provided with a second positioning groove 521 corresponding to the second positioning block 54, and the second positioning block 54 slides into the second positioning groove 521.

The implementation principle of the microphone of the embodiment is as follows: when the battery is replaced, the tail sleeve 7 is screwed down, and the connecting pipe 6 is taken down from the bracket 11. After the battery is replaced, the connecting pipe 6 is sleeved on the bracket 11, the tail sleeve 7 is screwed, and the connecting pipe 6 is tightly propped against the tail sleeve 7 and the limiting ring 51 to complete the installation.

Comparative example

Comparative example 1

85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the double-screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Comparative example 2

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 3kg of chlorinated paraffin, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the double-screw extruder is controlled to be 600-800 rpm, the extrusion temperature is controlled to be 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Comparative example 3

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Comparative example 4

85kg of ABS resin, 10kg of thermoplastic polyurethane, 11kg of toughening agent, 3kg of antioxidant and 2kg of lubricant are uniformly mixed and put into a double-screw extruder for blending granulation, the rotating speed of the screw extruder is controlled to be 600-800 rpm, the extrusion temperature is controlled to be 240-280 ℃, the pressure is 2-4 MPa, and the composite plastic can be prepared by melting, extruding and granulating.

Comparative example 5

Uniformly mixing 85kg of ABS resin, 10kg of thermoplastic polyurethane, 5kg of nano vanadium carbide powder, 10kg of mullite whisker, 3kg of antioxidant and 2kg of lubricant, putting the mixture into a double-screw extruder, blending and granulating, controlling the rotating speed of the double-screw extruder to be 600-800 rpm, the extrusion temperature to be 240-280 ℃ and the pressure to be 2-4 MPa, and melting, extruding and granulating to obtain the composite plastic.

Comparative example 6

Uniformly mixing 85kg of ABS resin, 10kg of thermoplastic polyurethane, 3kg of antioxidant and 2kg of lubricant, putting the mixture into a double-screw extruder, blending and granulating, controlling the rotating speed of the screw extruder to be 600-800 rpm, the extrusion temperature to be 240-280 ℃ and the pressure to be 2-4 MPa, and melting, extruding and granulating to obtain the composite plastic.

Comparative example 7

Comparative example 8

And uniformly mixing 85kg of ABS resin, 3kg of antioxidant and 2kg of lubricant, putting the mixture into a double-screw extruder, mixing and granulating, controlling the rotating speed of the screw extruder to be 600-800 rpm, the extrusion temperature to be 240-280 ℃ and the pressure to be 2-4 MPa, and melting, extruding and granulating to obtain the composite plastic.

TABLE 1 EXAMPLES 1 TO 37 AND COMPARATIVE EXAMPLES 1 TO 8 raw material tables (kg)

Performance test

Determination of the tensile Properties of plastics according to GB/T1040.1-2018/ISO 527-1:2012 first part: the tensile strengths of the composite plastics obtained in examples 1 to 53 and comparative examples 1 to 8 were examined.

Part 2 of the determination of impact Properties of Plastic simply Supported beams according to GB/T1043.1-2008/ISO 179-1: 2000: instrumented impact test the notched impact strength of the simple beam of the composite plastics prepared in examples 1 to 53 and comparative examples 1 to 8 was determined.

TABLE 2 tables of Performance test data for examples 1-53 and comparative examples 1-8

By combining examples 2-10, comparative example 7 and comparative example 8 and table 2, it can be seen that adding thermoplastic polyurethane to ABS resin and adjusting the amount of addition can effectively improve the tensile strength of the composite plastic, thereby improving the toughness of the composite plastic.

By combining the example 6 and the comparative examples 1 to 7 and combining the table 2, it can be seen that the thermoplastic polyurethane and the toughening agent effectively improve the toughness of the plastic, and simultaneously, the filler and the toughening agent are combined to effectively improve the rigidity of the plastic, so that the rigidity reduction degree caused by the addition of the thermoplastic polyurethane and the toughening agent is reduced, and the plasticizer improves the stability of the toughening agent and the filler in the plastic by improving the plasticity of the plastic, so that the toughness of the plastic is further improved, and the impact resistance of the plastic is improved.

By combining the examples 11 to 36 and the table 2, it can be seen that the impact strength of the composite plastic is improved by adjusting the addition amounts of the toughening agent, the nano vanadium carbide powder, the mullite whisker and the chlorinated paraffin, so that the toughness of the composite plastic is effectively improved.

By combining the embodiment 6, the embodiment 37 and the embodiment 38 and combining the table 2, it can be seen that the nano vanadium carbide powder and the mullite whisker are used as the filler, so that the impact resistance of the composite plastic is effectively improved, and the toughness of the composite plastic is improved.

By combining example 6 with examples 39 to 46 and table 2, it can be seen that the addition amounts of the antioxidant and the lubricant are adjusted, so that the anti-aging performance of the composite plastic is effectively improved, and the components are mixed more uniformly, so that the performance of the composite plastic is effectively improved.

As can be seen by combining example 6 with examples 47-52 and table 2, the toughness of the composite plastic is enhanced after absorbing water by adding nylon and diatomite as the moisture absorption material, so that the tensile strength and the impact strength of the composite plastic are increased.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The impact-resistant ABS resin composite plastic is characterized by comprising the following raw materials in parts by weight: 70-100 parts of ABS resin, 5-15 parts of thermoplastic polyurethane, 20-38 parts of a modifier and 3-7 parts of an auxiliary agent, wherein the modifier comprises a toughening agent, a filler and a plasticizer, and the weight ratio of the toughening agent to the filler to the plasticizer is 7-15: 10-20: 3.

2. The impact-resistant ABS resin composite plastic as claimed in claim 1, wherein: the filler comprises nano vanadium carbide powder and mullite whisker, and the weight ratio of the nano vanadium carbide powder to the mullite whisker is 1: 1-3.

3. The impact-resistant ABS resin composite plastic as claimed in claim 2, wherein: the plasticizer is chlorinated paraffin.

4. The impact-resistant ABS resin composite plastic according to claim 3, wherein: the weight ratio of the toughening agent to the nano vanadium carbide powder to the mullite whisker to the chlorinated paraffin is 11:5:10: 3.

5. The impact-resistant ABS resin composite plastic according to claim 3, wherein: the ABS resin and the thermoplastic polyurethane are mixed together, the mass ratio of the nylon to the compatilizer is 5:1, and the weight ratio of the ABS resin to the thermoplastic polyurethane to the nylon is 14-20: 1-3: 1.

6. The impact-resistant ABS resin composite plastic according to claim 5, wherein: the coating also comprises diatomite, wherein the weight ratio of the diatomite to the nylon is 5: 1-2.

7. The impact-resistant ABS resin composite plastic according to claim 1, wherein: the auxiliary agent comprises an antioxidant and a lubricant, and the weight ratio of the antioxidant to the lubricant is 2-4: 1-3.

8. The method for preparing an impact-resistant ABS resin composite plastic material as claimed in claim 1 to 7, which comprises the following steps: the ABS resin, the thermoplastic polyurethane, the modifier and the auxiliary agent are uniformly mixed, and the mixture is melted and granulated by a screw extruder to prepare the composite plastic.

9. The utility model provides a microphone, includes main part (1), be provided with battery compartment (2) that are used for placing the battery on main part (1), shown main part (1) one end is fixed with miaow head (3), main part (1) is close to miaow head (3) one end fixedly connected with protection casing (4), its characterized in that, the cover is equipped with connecting pipe (6) that are used for covering battery compartment (2) on main part (1), connecting pipe (6) are moulded plastics by the composite plastic of claim 1-7 and are formed, main part (1) is kept away from miaow head (3) one end threaded connection has tail cover (7), tail cover (7) and connecting pipe (6) butt.