A method for preparing a rubber strip and a rubber strip structure

Abstract

The embodiment of the present invention provides a method for preparing a rubber strip, comprising: sending a TPE material to a feeding device, and sealing and baking the material, wherein the baking temperature is maintained at 95 degrees / 3 hours; heating the TPE material after baking the material through a heating device until it is completely melted into a fluid; pressurizing the fluid and injecting it into a preset mold, and outputting a semi-finished rubber strip through a mold discharge port; cooling and cutting the semi-finished rubber strip to obtain a finished rubber strip. The thickness of the rubber strip made by this method can reach less than 2 mm and has good flexibility and wear resistance, and a translucent frosted effect rubber strip can be directly produced without separate processing, and the finished rubber strip has no pungent smell of vulcanized rubber.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic rubber, and in particular to a rubber strip preparation method and a rubber strip structure. Background Art

[0002] With the continuous development of industrial technology, the demand for rubber in life and production is increasing, and artificial synthetic rubber is a good substitute for natural rubber.

[0003] Traditional synthetic rubber, such as cross-linked vulcanized rubber, has excellent properties such as high elasticity, aging resistance, and oil resistance. It also has the characteristics of convenient processing and wide processing methods of ordinary plastics. It can be produced by injection molding, extrusion, blow molding and other processing methods. After the edges and corners of the sprue are crushed, 100% of them can be directly reused.

[0004] However, although the thickness and flexibility of synthetic rubber products can be adjusted through formula and process, it is difficult to have both low thickness and high toughness. In addition, the frosted effect during the production process requires reprocessing of the finished product, which increases costs. Summary of the invention

[0005] In view of the above problems, embodiments of the present invention are proposed to provide a method for preparing a rubber strip and a corresponding rubber strip structure that overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above problems, an embodiment of the present invention discloses a method for preparing a rubber strip, comprising:

[0007] The TPE material is sent to the unloading device and sealed and baked, wherein the baking temperature is maintained at 95 degrees / 3H;

[0008] The TPE material is heated by a heating device until it is completely melted into a fluid, wherein the heating temperature is a constant temperature of 145 degrees;

[0009] Injecting the fluid into a preset mold under pressure, and outputting the semi-finished rubber strip through the mold outlet;

[0010] The semi-finished rubber strip is cooled and cut to obtain the finished rubber strip.

[0011] Preferably, the TPE stock comprises the following quality components:

[0012] 60 parts of ethylene-propylene copolymer;

[0013] Polypropylene 30 parts;

[0014] SEBS 20-120 parts;

[0015] Oil 80 parts;

[0016] 10 parts of tackifier;

[0017] Antioxidant 1010 0.5 parts;

[0018] SBS 10-20 parts.

[0019] Preferably, it also includes:

[0020] Test the semi-finished rubber strips every 5 minutes;

[0021] If defective products are found, they will be put into the heating furnace for recycling.

[0022] Preferably, the oil is naphthenic oil or paraffinic oil.

[0023] Preferably, the step of pressurizing and injecting the fluid into a preset mold and outputting the semi-finished rubber strip through a mold outlet comprises:

[0024] The fluid is injected into the mold under pressure through an extruder at the rear end of the heating device.

[0025] Preferably, the cooling and cutting of the semi-finished rubber strip to obtain the finished rubber strip comprises:

[0026] The semi-finished rubber strip is cooled through a water tank.

[0027] The embodiment of the present invention further discloses a rubber strip structure, which is prepared by the above method and comprises:

[0028] The head end and the tail end are set as an integral rubber strip body;

[0029] The rubber strip body is translucent and frosted;

[0030] The cross-sectional length of the rubber strip body is 21.4 to 26 mm;

[0031] The thickness of the tail end is 1.01 to 1.51 mm;

[0032] The rubber strip body is made of TPE material, and its Shore hardness is Shore 30A-70A.

[0033] Preferably, micro grooves are symmetrically arranged at the upper end and the lower end of the head end.

[0034] Preferably, the micro-groove has an indentation angle of 86 degrees.

[0035] Preferably, the thickness of the head end is 3.57-3.95 mm; the cross-sectional length of the head end is 2.3-4 mm.

[0036] The embodiments of the present invention include the following advantages:

[0037] The rubber strip produced by the method can have a thickness of less than 2 mm and has good flexibility and wear resistance, and can directly produce a rubber strip with a translucent frosted effect without separate processing, and the finished rubber strip has no pungent smell of vulcanized rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flow chart of steps of an embodiment of a method for preparing a rubber strip of the present invention;

[0039] Figure 2 It is a schematic diagram of a rubber strip structure of the present invention. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more distinct and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] One of the core concepts of the embodiment of the present invention is that the TPE material is sent to the unloading device and sealed and baked, wherein the baking temperature is maintained at 95 degrees / 3H; the TPE material is heated by a heating device until it is completely melted into a fluid, wherein the heating temperature is a constant temperature of 145 degrees; the fluid is pressurized and injected into a preset mold, and the semi-finished rubber strip is output through the mold discharge port; the semi-finished rubber strip is cooled and cut to obtain a finished rubber strip. The thickness of the rubber strip made by this method can reach less than 2mm and has good flexibility and wear resistance, and a translucent frosted effect rubber strip can be directly produced without separate processing, and the finished rubber strip has no pungent smell of vulcanized rubber.

[0042] Reference Figure 1 , shows a flow chart of steps of an embodiment of a method for preparing a rubber strip of the present invention, which may specifically include the following steps:

[0043] S100, sending the TPE material to the unloading device, and sealing and baking the material, wherein the baking temperature is maintained at 95 degrees / 3H;

[0044] S200, heating the TPE material after baking by a heating device until it is completely melted into a fluid, wherein the heating temperature is a constant temperature of 145 degrees;

[0045] S300, pressurizing and injecting the fluid into a preset mold, and outputting the semi-finished rubber strip through the mold outlet;

[0046] S400, cooling and cutting the semi-finished rubber strip to obtain a finished rubber strip.

[0047] In an embodiment of the present application, the TPE prepared material is sent to a feeding device and sealed for baking, so that the heat is more concentrated during the baking process, rapid baking is achieved, and efficiency is improved, while also preventing odor from being emitted to the outside during baking; the TPE prepared material is baked at a heating rate of 95 degrees / 3H, so that the TPE prepared material is fully heated without being overheated to cause partial melting and adhesion to an active state.

[0048] Next, the method for preparing the rubber strip in this exemplary embodiment will be further described.

[0049] As described in step S100, the TPE material is sent to the unloading device and sealed and baked, wherein the baking temperature is maintained at 95 degrees / 3H.

[0050] Furthermore, the TPE stock comprises the following components by mass: 60 parts of ethylene-propylene copolymer; 30 parts of polypropylene; 20-120 parts of SEBS; 80 parts of oil; 10 parts of tackifier; 0.5 parts of antioxidant 1010; 10-20 parts of SBS; wherein the oil is cyclohexane oil or paraffin oil.

[0051] In the embodiments of the present application, the above-mentioned process combined with the above-mentioned formula can make the finished rubber strip directly obtain a frosted effect, without the need to frost the semi-finished product or finished product output from the mold, thereby improving the production efficiency of the product and saving steps. The rubber strip made by this process combined with the above-mentioned formula has good wear resistance, toughness and resilience.

[0052] In an embodiment of the present application, as described in step S200, the TPE material that has been baked is heated by a heating device until it is completely melted into a fluid, wherein the heating temperature is 120-190 degrees. The preferred heating temperature in the present application is a constant temperature of 145 degrees. By heating at a constant temperature of 145 degrees, the TPE material can be completely melted into a fluid, and it will not boil to generate bubbles in the fluid, thereby reducing the scrap rate of the finished rubber strip.

[0053] In one embodiment of the present invention, the specific process of "pressurizing and injecting the fluid into a preset mold, and outputting the semi-finished rubber strip through the mold outlet" in step S300 can be further explained in combination with the following description.

[0054] The fluid is pressurized and injected into a preset mold as described in the following steps, and the semi-finished rubber strip is output through the mold outlet, and the semi-finished rubber strip is also tested once every 5 minutes; if a defective product is found, the defective product is put into the heating furnace for recycling;

[0055] The fluid is injected into the mold under pressure through an extruder at the rear end of the heating device as described in the following steps.

[0056] It should be noted that, by testing the semi-finished rubber strips every 5 minutes, for example, by using optical testing equipment, the light transmittance of the rubber strips is tested. If uneven light transmittance is found, it is regarded as a defective product. The defective products are cut and recycled and added to the unloading device as raw materials, thereby avoiding the generation of waste in the production process.

[0057] As an example, the fluid is pressurized and injected into the mold through the extruder at the rear end of the heating device, so that it is extruded from the mold mouth; wherein the pressure of the extruded fluid by the extruder through the screw rod is a fixed value, so that when the TPE material forming the fluid passes through the mold to form a rubber strip, it can be quickly formed and the density and thickness of the formed rubber strip can be uniform; the thickness of the rubber strip is reduced while ensuring the quality of the rubber strip, thereby saving raw materials.

[0058] As described in step S400, the semi-finished rubber strip is cooled and cut to obtain a finished rubber strip. Specifically, the semi-finished rubber strip cooled in a water tank is cut to obtain a finished rubber strip. During extrusion, the mold outlet can be set to a desired shape to extrude rubber strips with different cross-sectional shapes according to actual needs, and after extrusion, it can be cut into rubber strips of different lengths according to assembly or customer order requirements.

[0059] In one embodiment of the present invention, it should be noted that cooling through a water tank can accelerate the cooling speed of the product, thereby improving production efficiency.

[0060] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0061] Reference Figure 2 , showing a rubber strip structure of the present invention, which is obtained by the above method, including: a rubber strip body 1 with a head end 11 and a tail end 12 as an integral body; the rubber strip body 1 is translucent and frosted; the cross-sectional length of the rubber strip body 1 is 21.4 to 26 mm; the thickness of the tail end 12 is 1.01 to 1.51 mm; the rubber strip body 1 is made of TPE material with a Shore hardness of Shore 30A to 70A, wherein the TPE material is the above-mentioned TPE stock.

[0062] In the above embodiments, the rubber strips can be used for desktop wire boxes, wipers, wipers, seals, and gaskets, etc. They have a simple structure, good toughness, wear resistance, and recoverability, and can be cut to size according to usage requirements during application.

[0063] In one embodiment, micro grooves 13 are symmetrically arranged at the upper and lower ends of the head end 11. The recessed angle of the micro grooves 13 is 86 degrees. The micro grooves 13 close to right angles can increase the contact surface with the fixed position during fixation, and can also be used as a slot.

[0064] In one embodiment, the thickness of the head end 11 is 3.57-3.95 mm; the cross-sectional length of the head end 11 is 2.3-4 mm.

[0065] In the above embodiment, the rubber strip is made by the above method and the mold, and the positive error of its thickness is +0.15mm to -0.1mm; the cross-sectional length error of the rubber strip body 1 does not exceed ±0.25.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0068] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0069] The above is a detailed introduction to a method for preparing a rubber strip and a rubber strip structure provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for preparing a rubber strip, characterized in that: include: The TPE material is sent to the unloading device and sealed and baked, wherein the baking temperature is maintained at 95 degrees / 3H; The TPE material is heated by a heating device until it is completely melted into a fluid, wherein the heating temperature is a constant temperature of 145 degrees; The fluid is pressurized and injected into a preset mold, and the semi-finished rubber strip is output through the mold outlet; wherein the semi-finished rubber strip is inspected every 5 minutes; if defective products are found, the defective products are put into a heating furnace for recycling; The semi-finished rubber strip is cooled and cut to obtain a finished rubber strip; wherein the finished rubber strip comprises a rubber strip body with a head end and a tail end being integrated; the rubber strip body is translucent and frosted; the upper end and the lower end of the head end are symmetrically provided with micro grooves; the cross-sectional length of the rubber strip body is 21.4 to 26 mm; the thickness of the tail end is 1.01 to 1.51 mm; the rubber strip body is made of TPE material, and its Shore hardness is Shore 30A to 70A; The TPE material comprises the following quality components: 60 parts of ethylene-propylene copolymer; Polypropylene 30 parts; SEBS 20-120 parts; Oil 80 parts; 10 parts of tackifier; Antioxidant 1010 0.5 parts; 10-20 parts of SBS.

2. The method according to claim 1, characterized in that: The oil is naphthenic oil or paraffinic oil.

3. The method according to claim 1, characterized in that The step of pressurizing the fluid and injecting it into a preset mold, and outputting the semi-finished rubber strip through the mold outlet, comprises: The fluid is injected into the mold under pressure through the extruder at the rear end of the heating device, and the semi-finished rubber strip is output through the mold discharge port.

4. The method according to claim 1, characterized in that The step of cooling and cutting the semi-finished rubber strip to obtain the finished rubber strip comprises: The semi-finished rubber strips are cut after being cooled in a water tank to obtain finished rubber strips.

5. A rubber strip structure obtained by the rubber strip preparation method according to claim 1, characterized in that: The micro groove has an indentation angle of 86 degrees.

6. The rubber strip structure according to claim 5, characterized in that: The thickness of the head end is 3.57-3.95 mm; the cross-sectional length of the head end is 2.3-4 mm.

Images