阅读说明：本技术 一种包布式汽车门框密封条及其制备工艺 (Wrapping cloth type automobile door frame sealing strip and preparation process thereof ) 是由 程朝武 于 2019-10-23 设计创作，主要内容包括：本发明涉及汽车门框密封条技术领域,且公开了一种包布式汽车门框密封条及其制备工艺,包括U型安装基部,U型安装基部内壁的顶部固定连接有多个短凸条部,且U型安装基部内壁的底部固定连接有与多个短凸条部相匹配的长凸条部,U型安装基部外壁的顶部固定连接有唇边,且唇边相背离U型安装基部一侧的侧壁通过粘合胶粘接有绒布层,U型安装基部内固定嵌设有条形钢片和L型钢片,且U型安装基部的上方设有环形缓冲件,且环形缓冲件侧壁的底部通过两个连接部与U型安装基部的侧壁固定连接设置。本发明具有良好弹性和抗压缩变形、耐老化、臭氧、化学作用、较宽的使用温度范围,同时具有热稳定性好、阻燃性能持久和无毒抑烟的效果。(The invention relates to the technical field of automobile door frame sealing strips, and discloses a cloth-coated automobile door frame sealing strip and a preparation process thereof. The invention has good elasticity, compression deformation resistance, aging resistance, ozone resistance, chemical action, wider use temperature range, good thermal stability, lasting flame retardant property, no toxicity and smoke suppression.)

1. The utility model provides a infantees formula car door frame sealing strip, includes U type installation basal portion (1), its characterized in that: the utility model discloses a U type installation base portion (1) is characterized in that the top fixedly connected with of U type installation base portion (1) inner wall has a plurality of short protruding strip portions (2), and the bottom fixedly connected with of U type installation base portion (1) inner wall has long protruding strip portion (3) with a plurality of short protruding strip portions (2) assorted, the top fixedly connected with lip limit (4) of U type installation base portion (1) outer wall, and lip limit (4) deviate from the lateral wall of U type installation base portion (1) one side mutually and have flannelette layer (5) through the bonding glue bonding, U type installation base portion (1) internal fixation inlays and is equipped with bar steel sheet (6) and L type steel sheet (7), and the top of U type installation base portion (1) is equipped with annular bolster (8), and the lateral wall fixed connection setting of two connecting portion (9) and U type installation base portion (1) is.

2. The cloth-covered type automobile door frame sealing strip according to claim 1, characterized in that: the lip edge (4) is fixedly connected with a pull rope (10) towards the side wall of one side of the U-shaped mounting base part (1), and the pull rope (10) is arranged at the bottom of the lip edge (4).

3. The cloth-covered type automobile door frame sealing strip according to claim 1, characterized in that: four short convex strip parts (2) are arranged.

4. The cloth-covered type automobile door frame sealing strip according to claim 1, characterized in that: the U-shaped mounting base (1), the short convex strip portions (2), the long convex strip portions (3), the lip edges (4) and the pull ropes (10) are all made of dense rubber materials, and the annular buffer piece (8) and the two connecting portions (9) are all made of foamed rubber materials.

5. The preparation process of the cloth-coated automobile door frame sealing strip is characterized by comprising the following steps of:

step 1: placing a proper amount of EPDM raw rubber into an internal mixer, plasticating the raw rubber at the temperature of 70-80 ℃ for 1min, sequentially adding a proper amount of white filler, carbon black, heavy calcium carbonate, calcium oxide, an additive and stearic acid, mixing, adjusting the temperature range to 140-160 ℃, and mixing for 7 min;

step 2: putting the mixed rubber mixture into an open mill for thin passing and roller wrapping for a plurality of times to prepare a rubber sheet, stirring the mixed rubber mixture at the temperature of between 60 and 70 ℃, and discharging the rubber sheet after open milling for 15min to prepare initial rubber;

and step 3: adding the initial rubber into an internal mixer again, adding sulfur, physical foaming rubber and chemical foaming rubber with different contents for internal mixing, wherein the internal mixing time is 3min respectively to obtain initial compact rubber and initial foaming rubber, putting the initial compact rubber and the initial foaming rubber into an open mill for passing, wrapping and rolling for a plurality of times, and then discharging sheets to prepare compact rubber and foaming rubber;

and 4, step 4: placing the prepared compact rubber and foamed rubber in an extruder, enabling the steel sheet to pass through an alloy nozzle and an extrusion die to realize co-extrusion, preparing composite sealing strip products with various required shapes, and placing the extruded composite sealing strip products in a microwave oven and a hot air oven for vulcanization;

and 5: and naturally airing and deburring the prepared sealing strip in the shade, and bonding the flannelette layer and the sealing strip together through the adhesive to prepare a finished sealing strip product.

6. The preparation process of the cloth-covered type automobile door frame sealing strip according to claim 5, characterized in that: the additives comprise a flame retardant, an accelerator, a scorch retarder and paraffin oil.

7. The preparation process of the cloth-covered type automobile door frame sealing strip according to claim 5, characterized in that: the vulcanizing temperature range is 180-260 ℃, the microwave power range is 4.5-8.0KW, and the vulcanizing time range is 15-20 min.

8. The preparation process of the cloth-covered type automobile door frame sealing strip according to claim 5, characterized in that: the number of thin passing and roller wrapping times of the mill is 5-6.

9. The preparation process of the cloth-covered type automobile door frame sealing strip according to claim 5, characterized in that: the dense rubber and the foamed rubber both contain a plurality of foaming holes therein, and the number of the foaming holes in the dense rubber are smaller than those in the foamed rubber.

Technical Field

The invention relates to the technical field of automobile door frame sealing strips, in particular to a wrapping cloth type automobile door frame sealing strip and a preparation process thereof.

Background

The automobile sealing strip is arranged at the positions of an automobile body door frame, an automobile door, a trunk, an engine room and the like, and the automobile plays a role of sealing through the laminating effect between the automobile sealing strip and the sealing strip in a closed state, so that harmful substances such as external wind, rain, dust and the like are prevented from invading the automobile, the vibration generated at the positions of the automobile door, the window, the trunk, the engine room cover and the like in the running process is reduced, and the cleanness, the comfort and the delicate feeling in the automobile are kept.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the cloth-coated automobile door frame sealing strip and the preparation process thereof, wherein the cloth-coated automobile door frame sealing strip has good elasticity, compression deformation resistance, aging resistance, ozone and chemical action and a wider use temperature range, so that the continuity among all parts of an automobile body can be ensured, the generation of air flow separation at a combined part is avoided, the wind noise during high-speed driving is reduced, the air tightness and the dust-proof capability of an original automobile can be enhanced, the cloth-coated automobile door frame sealing strip has the advantages of good thermal stability, lasting flame retardant property and non-toxic smoke suppression effect, and the problems that the sealing strip is easy to deform and age quickly, poor in thermal stability and easy to generate peculiar smell in a high-temperature environment when in use, and the continuity among all parts of the.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a infantees formula car door frame sealing strip, includes U type installation basal portion, a plurality of short protruding strip portions of top fixedly connected with of U type installation basal portion inner wall, and the bottom fixedly connected with of U type installation basal portion inner wall and a plurality of short protruding strip portion assorted long protruding strip portion, the top fixedly connected with lip limit of U type installation basal portion outer wall, and the lip limit is back to the lateral wall of U type installation basal portion one side and has the cotton flannel layer through gluing bonding, U type installation basal portion internal fixation inlays and is equipped with bar steel sheet and L shaped steel piece, and the top of U type installation basal portion is equipped with annular bolster, and the bottom of annular bolster lateral wall sets up through the lateral wall fixed connection of two connecting portions and U type installation basal portion.

Preferably, a pull rope is fixedly connected to a side wall of the lip opposite to one side of the U-shaped mounting base, and the pull rope is arranged at the bottom of the lip.

Preferably, four of the plurality of short ridge portions are provided.

Preferably, the U-shaped mounting base, the plurality of short raised strips, the long raised strips, the lip and the pull rope are all made of a solid rubber material, and the annular buffer member and the two connecting portions are all made of a foamed rubber material.

A preparation process of a cloth-coated automobile door frame sealing strip,

step 1: placing a proper amount of EPDM raw rubber into an internal mixer, plasticating the raw rubber at the temperature of 70-80 ℃ for 1min, sequentially adding a proper amount of white filler, carbon black, heavy calcium carbonate, calcium oxide, an additive and stearic acid, mixing, adjusting the temperature range to 140-160 ℃, and mixing for 7 min;

step 2: putting the mixed rubber mixture into an open mill for thin passing and roller wrapping for a plurality of times to prepare a rubber sheet, stirring the mixed rubber mixture at the temperature of between 60 and 70 ℃, and discharging the rubber sheet after open milling for 15min to prepare initial rubber;

and step 3: adding the initial rubber into an internal mixer again, adding sulfur, physical foaming rubber and chemical foaming rubber with different contents for internal mixing, wherein the internal mixing time is 3min respectively to obtain initial compact rubber and initial foaming rubber, putting the initial compact rubber and the initial foaming rubber into an open mill for passing, wrapping and rolling for a plurality of times, and then discharging sheets to prepare compact rubber and foaming rubber;

and 4, step 4: placing the prepared compact rubber and foamed rubber in an extruder, enabling the steel sheet to pass through an alloy nozzle and an extrusion die to realize co-extrusion, preparing composite sealing strip products with various required shapes, and placing the extruded composite sealing strip products in a microwave oven and a hot air oven for vulcanization;

and 5: and naturally airing and deburring the prepared sealing strip in the shade, and bonding the flannelette layer and the sealing strip together through the adhesive to prepare a finished sealing strip product.

Preferably, the additives include flame retardants, accelerators, scorch retarders and paraffin oils.

Preferably, the vulcanization temperature is in the range of 180-260 ℃, the microwave power is in the range of 4.5-8.0KW, and the vulcanization time is in the range of 15-20 min.

Preferably, the number of thin passing and roll wrapping times of the mill is in the range of 5-6.

Preferably, the dense rubber and the foamed rubber both contain a plurality of foaming pores therein, and the number and number of the foaming pores in the dense rubber are smaller than those in the foamed rubber

(III) advantageous effects

Compared with the prior art, the invention provides the wrapping cloth type automobile door frame sealing strip and the preparation process thereof, and the wrapping cloth type automobile door frame sealing strip has the following beneficial effects:

1. this infantees formula car door frame sealing strip, through adding white filler, carbon black, ground limestone, calcium oxide, additive, stearic acid mixture, sulphur, physics foaming glue and chemical foaming glue, can make the sealing strip have good elasticity and resistance to compression deformation, ageing-resistant, ozone, chemical action, the application temperature range of broad, thereby can guarantee continuity between each part of automobile body, avoid combining the position to produce the air current separation, wind noise when reducing high-speed driving, can strengthen the gas tightness and the dustproof ability of former car simultaneously, simple process, reasonable formula, rethread is equipped with the interpolation machine, can make the sealing strip have that thermal stability is good, fire behavior is lasting and nontoxic effect of pressing down the cigarette.

Drawings

Fig. 1 is a schematic structural diagram of a cloth-covered type automobile door frame sealing strip provided by the invention.

In the figure: the device comprises a 1U-shaped mounting base, 2 short convex strip parts, 3 long convex strip parts, 4 lip edges, 5 flannelette layers, 6 strip-shaped steel sheets, 7L-shaped steel sheets, 8 annular buffer parts, 9 connecting parts and 10 pull ropes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a cloth-covered type automobile door frame sealing strip comprises a U-shaped mounting base 1, wherein the top of the inner wall of the U-shaped mounting base 1 is fixedly connected with a plurality of short convex strip portions 2, the bottom of the inner wall of the U-shaped mounting base 1 is fixedly connected with a long convex strip portion 3 matched with the plurality of short convex strip portions 2, the top of the outer wall of the U-shaped mounting base 1 is fixedly connected with a lip edge 4, the side wall of the lip edge 4, which is far away from the side of the U-shaped mounting base 1, is bonded with a flannelette layer 5 through bonding glue, a strip steel sheet 6 and an L-shaped steel sheet 7 are fixedly embedded in the U-shaped mounting base 1, an annular buffer 8 is arranged above the U-shaped mounting base 1, the bottom of the side wall of the annular buffer 8 is fixedly connected with the side wall of the U-shaped mounting base 1 through two connecting portions 9, the U-shaped mounting base 1 can be clamped on an automobile door frame and passes, the short convex strip portions 2 and the long convex strip portions 3 can be tightly abutted to the automobile door frame, so that the use stability of the U-shaped installation base portion 1 is guaranteed, the flannelette layer 5 arranged in the old palace of the unborn child can better improve the sealing and sound insulation effects of the sealing strip, and the use of people is facilitated.

The lip edge 4 is fixedly connected with a pull rope 10 on the side wall of the U-shaped installation base part 1 opposite to the lip edge 4, and the pull rope 10 is arranged at the bottom of the lip edge 4, so that the lip edge 4 can be conveniently pulled open, and the lip edge 4 can be conveniently attached to an automobile door frame.

The number of the plurality of short convex strip portions 2 is four, and the engagement effect of the U-shaped mounting base portion 1 can be ensured.

The U-shaped mounting base 1, the plurality of short raised strips 2, the long raised strips 3, the lip 4 and the pull rope 10 are all made of a dense rubber material, and the annular buffer 8 and the two connecting parts 9 are all made of a foamed rubber material.

A preparation process of a cloth-coated automobile door frame sealing strip,

step 1: placing a proper amount of EPDM raw rubber into an internal mixer, plasticating the raw rubber at the temperature of 70-80 ℃ for 1min, sequentially adding a proper amount of white filler, carbon black, heavy calcium carbonate, calcium oxide, an additive and stearic acid, mixing, adjusting the temperature range to 140-160 ℃, and mixing for 7 min;

step 2: putting the mixed rubber mixture into an open mill for thin passing and roller wrapping for a plurality of times to prepare a rubber sheet, stirring the mixed rubber mixture at the temperature of 60-70 ℃ to prevent the rubber mixture from being cooled and influencing the open milling effect, and discharging the rubber sheet after open milling for 15min to prepare initial rubber;

and step 3: adding the initial rubber into an internal mixer again, adding sulfur, physical foaming rubber and chemical foaming rubber with different contents for internal mixing, wherein the internal mixing time is 3min respectively, the reaction degrees of the initial rubber can be different by using different amounts of sulfur, physical foaming rubber and chemical foaming rubber, further preparing rubbers with different forms to obtain initial compact rubber and initial foaming rubber, putting the initial compact rubber and the initial foaming rubber into an open mill for passing and wrapping for a plurality of times, and then discharging sheets, thereby preparing the compact rubber and the foaming rubber;

and 4, step 4: the prepared compact rubber and foamed rubber are placed in an extruder, a steel sheet passes through an alloy nozzle and an extrusion die to realize co-extrusion, composite sealing strip products with various required shapes are prepared, the extruded composite sealing strip products are placed in a microwave oven and a hot air oven to be vulcanized, a chemical foaming agent is heated and decomposed, and the foamed rubber can be vulcanized and crosslinked, so that the proper size and uniform distribution of bubbles are ensured, meanwhile, a physical foaming agent is heated and expanded to form spherical elastic entities, and the spherical elastic entities are uniformly distributed in the bubbles formed by the chemical foaming agent, so that the use effect of the rubber can be ensured;

and 5: and naturally airing and deburring the prepared sealing strip in the shade, and bonding the flannelette layer and the sealing strip together through the adhesive to prepare a finished sealing strip product.

The additive comprises a flame retardant, an accelerant, a scorch retarder and paraffin oil, so that the sealing strip has the effects of good thermal stability, lasting flame retardant property, no toxicity and smoke suppression.

The vulcanizing temperature range is 180-260 ℃, the microwave power range is 4.5-8.0KW, and the vulcanizing time range is 15-20min, so that the stability in the vulcanizing process can be ensured, and the vulcanizing effect can be ensured.

The frequency range of the thin passing and the roller wrapping of the mill is 5-6 times, and the effect of rubber preparation is ensured.

The dense rubber and the foamed rubber are both provided with a plurality of foaming holes, and the quantity and number of the foaming holes in the dense rubber are smaller than those in the foamed rubber.

In conclusion, the cloth-coated automobile door frame sealing strip and the preparation process thereof have the advantages that the sealing strip has good elasticity, compression deformation resistance, aging resistance, ozone and chemical action and a wider use temperature range by adding the white filler, the carbon black, the heavy calcium carbonate, the calcium oxide, the additive, the stearic acid mixture, the sulfur, the physical foaming adhesive and the chemical foaming adhesive, so that the continuity among all parts of an automobile body can be ensured, the air flow separation generated at a combined part is avoided, the wind noise during high-speed driving is reduced, the air tightness and the dust-proof capability of an original automobile can be enhanced, the process is simple, the formula is reasonable, and the sealing strip can have the effects of good thermal stability, lasting flame retardant property, no toxicity and smoke suppression by the aid of the arranged adding machine.

It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.