阅读说明：本技术 一种防震楼梯板制作工艺 (Manufacturing process of shockproof stair board ) 是由 蔡建国 于 2020-07-31 设计创作，主要内容包括：本发明涉及楼梯板制作工艺技术领域,尤其是一种防震楼梯板制作工艺,包括以下步骤：混合,向混料机中加入玻纤粉、聚四氟乙烯悬浮料、聚四氟乙烯分散料,混合均匀后出料；研磨,对混合好的混料进行研磨；过筛,筛出目数在60-180目之间的混料；预烧结,对60-180目之间的混料进行预烧结成块；造粒,对烧结成块的混料进行造粒；加工成型,采用经造粒步骤的颗粒制成楼梯板,本发明制造出的楼梯板硬度较高、韧性较好,值得推广。(The invention relates to the technical field of stair tread manufacturing processes, in particular to a shockproof stair tread manufacturing process, which comprises the following steps: mixing, adding the glass fiber powder, the polytetrafluoroethylene suspension and the polytetrafluoroethylene dispersion materials into a mixer, uniformly mixing and then discharging; grinding, namely grinding the mixed materials; sieving to obtain 60-180 mesh mixed material; pre-sintering, namely pre-sintering the mixed material of 60 to 180 meshes into blocks; granulating, namely granulating the sintered and agglomerated mixed material; the stair boards are processed and formed, and the particles subjected to the granulation step are used for manufacturing the stair boards.)

1. A manufacturing process of a shockproof stair board is characterized by comprising the following steps:

s1: mixing, adding the glass fiber powder, the polytetrafluoroethylene suspension and the polytetrafluoroethylene dispersion materials into a mixer, uniformly mixing and then discharging;

s2: grinding, namely grinding the mixed materials;

s3: sieving to obtain 60-180 mesh mixed material;

s4: pre-sintering, namely pre-sintering the mixed material of 60 to 180 meshes into blocks;

s5: granulating, namely granulating the sintered and agglomerated mixed material;

s6: and (4) processing and molding, namely preparing the stair tread by adopting the granules subjected to the granulation step.

2. The manufacturing process of the quakeproof stair tread as claimed in claim 1, wherein the ratio of the glass fiber powder, the polytetrafluoroethylene suspension and the polytetrafluoroethylene dispersion material is 4% -6% of the glass fiber powder: 50% -60% of polytetrafluoroethylene suspension: 30-40% of polytetrafluoroethylene dispersing material.

3. The manufacturing process of the quakeproof stair tread as claimed in claim 1, wherein the pre-sintering is divided into four stages, wherein the first stage heats the mixed material to 80 ℃ at a constant speed, the second stage continuously heats the mixed material to 170 ℃ at a constant speed, the third stage continuously heats the mixed material to 320 ℃ at a constant speed, and the fourth stage finally heats the mixed material to 370 ℃ at a constant speed.

4. The manufacturing process of the quakeproof stair board as claimed in claim 3, wherein the temperature of the mixed material at normal temperature is raised to 80 ℃ for 2 hours, the mixed material is heated to 80 ℃ and then is kept warm for 4 hours, the mixed material is heated to 170 ℃ for 4 hours after the temperature is kept for 4 hours, the mixed material is heated to 170 ℃ for 4 hours, the mixed material is heated to 320 ℃ for 2.5-3 hours after the temperature is kept for 4 hours, the mixed material is heated to 320 ℃ for 7 hours, the mixed material is heated to 320 ℃ for 2 hours after the temperature is kept for 7 hours, finally the mixed material is heated to 370 ℃ for 2 hours after the temperature is kept for 7 hours, and the blocky mixed material is taken out.

5. The process for manufacturing a quakeproof stair tread as claimed in claim 1, wherein the granules with the particle size of less than 4mm are taken for processing after the granulating step.

Technical Field

The invention relates to the technical field of stair tread manufacturing processes, in particular to a shockproof stair tread manufacturing process.

Background

Polytetrafluoroethylene has excellent sliding property (minimum friction coefficient), excellent compression resistance, reliable strength and large-proportion stretch ratio, polytetrafluoroethylene stair boards are mainly used in various types of building stairs and are generally fixed by concrete, the aim is to change the vibration frequency of an object to achieve, the sliding stairs can be used as an independent unit to vibrate independently and in small amplitude in case of earthquake instead of vibrating violently along with a main building or the ground, so that the damage of the earthquake to the sliding stairs is reduced, the smooth safe passage is ensured during the earthquake, and people evacuate timely, the existing polytetrafluoroethylene stair boards are all made of polytetrafluoroethylene suspension materials, namely polytetrafluoroethylene resin is molded by a die pressing method at normal temperature and then sintered and cooled, and the polytetrafluoroethylene boards made of the polytetrafluoroethylene suspension materials are not high enough in hardness, meanwhile, the toughness is poor, and a stair tread with high hardness and good toughness is needed.

Disclosure of Invention

The invention aims to solve the defects of low hardness and poor toughness of a polytetrafluoroethylene suspended material stair plate in the prior art, and provides a manufacturing process of a shockproof stair plate.

In order to achieve the purpose, the invention adopts the following technical scheme:

a manufacturing process of a shockproof stair board is designed, and comprises the following steps: s1: mixing, adding the glass fiber powder, the polytetrafluoroethylene suspension and the polytetrafluoroethylene dispersion materials into a mixer, uniformly mixing and then discharging;

s2: grinding, namely grinding the mixed materials;

s3: sieving to obtain 60-180 mesh mixed material;

s4: pre-sintering, namely pre-sintering the mixed material of 60 to 180 meshes into blocks;

s5: granulating, namely granulating the sintered and agglomerated mixed material;

s6: and (4) processing and molding, namely preparing the stair tread by adopting the granules subjected to the granulation step.

Preferably, the ratio of the glass fiber powder, the polytetrafluoroethylene suspension and the polytetrafluoroethylene dispersing material is 4-6 percent: 50% -60% of polytetrafluoroethylene suspension: 30-40% of polytetrafluoroethylene dispersing material.

Preferably, the pre-sintering is divided into four stages, wherein the mixed material is heated to 80 ℃ at a constant speed in the first stage, the mixed material is continuously heated to 170 ℃ at a constant speed in the second stage, the mixed material is continuously heated to 320 ℃ at a constant speed in the third stage, and the mixed material is finally heated to 370 ℃ at a constant speed in the fourth stage.

Preferably, the temperature of the mixed material at the normal temperature is raised to 80 ℃ for 2h, the mixed material is heated to 80 ℃ and then is kept warm for 4h, the mixed material is heated to 170 ℃ for 4h after being kept warm for 4h, the mixed material is heated to 170 ℃ for continuing to keep warm for 4h, the mixed material is heated to 320 ℃ for 2.5-3h after being kept warm for 4h, the mixed material is heated to 320 ℃ for 7h, finally the mixed material at 320 ℃ after being kept warm for 7h is heated to 370 ℃ for 2h, and finally the mixed material is kept warm for 7h, and the blocky mixed material is taken out.

Preferably, after the granulation step, the granules with the particle size of less than 4mm are taken and processed.

The manufacturing process of the shockproof stair board provided by the invention has the beneficial effects that:

the glass fiber powder is added into the mixed material, the specific manufacturing process is matched, the surface hardness of the polytetrafluoroethylene plate is improved, a proper amount of polytetrafluoroethylene dispersing material and the specific manufacturing process are added into the mixed material, so that the manufactured plate has good toughness, the plate is not easy to break, the stair plate can be well prevented from breaking in an earthquake, and a good shockproof effect is achieved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.