Preparation method and application of glass injection molding silica gel

Abstract

The invention discloses a glass injection molding silica gel preparation method and application, and belongs to the technical field of glass injection molding silica gel, the glass injection molding silica gel preparation method comprises the following steps: S1, mold design and manufacturing: a mold comprises a positioning groove for positioning a glass plate and an injection molding cavity for injection molding of a silica gel strip; s2, pretreating a glass plate, namely cleaning, decontaminating and drying the glass plate; s3, material preparation: raw materials are prepared in proportion and put into an injection molding machine to be melted into a molten state, and the raw materials comprise silica gel and additives; s4, injection molding is conducted, specifically, the pretreated glass plate is placed in a positioning groove, and silica gel in a molten state is input into an injection molding cavity; s5, vulcanizing and cooling: heating the mold to vulcanize the silica gel, and then cooling the mold; and S6, demolding and post-processing. The method has the beneficial effects that the waterproof performance is improved, the durability is enhanced, the production process is simplified, the product attractiveness is improved, and wide application is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of glass injection molding silicone rubber, and in particular to a preparation method and application of glass injection molding silicone rubber. Background Art

[0002] With the rapid development of modern electronic products, especially the popularity of smart wearable devices such as smart phones and smart watches, higher and higher requirements are placed on the waterproof performance of products. Although traditional waterproof methods, such as coating with waterproof coating or using waterproof rubber rings, can meet the waterproof requirements to a certain extent, they have problems such as complex process, unstable waterproof effect, and easy aging and falling off.

[0003] Glass injection silicone preparation technology is a technology that tightly combines silicone materials with glass plates by injection molding. This technology can not only achieve seamless connection between glass plates and silicone strips, improve the integrity and aesthetics of the product, but also effectively prevent the intrusion of moisture and dust through the elasticity and sealing performance of silicone, thereby significantly improving the waterproof performance of electronic products. The composite of silicone and glass plates can also play a role in preventing falls through the elasticity of silicone. However, the existing glass injection silicone preparation technology still has some shortcomings, such as unreasonable mold design, unstable injection molding process, improper silicone raw material ratio, etc., which lead to problems such as loose bonding between the silicone strips and glass plates and poor waterproof performance. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method for preparing glass injection molding silica gel and its application, and the present invention is achieved through the following technical solutions.

[0005] A preparation method and application of glass injection molding silica gel, wherein the glass injection molding silica gel is composed of a glass plate and a silica gel strip compounded thereon;

[0006] The method for preparing glass injection molding silica gel comprises the following steps:

[0007] S1, mold design and production, design and produce the mold according to the size of the glass plate and the size of the silicone strip to be injection molded, the mold includes a positioning groove for positioning the glass plate and an injection cavity for injection molding the silicone strip;

[0008] S2, glass plate pretreatment, cleaning, decontamination and drying of the glass plate;

[0009] S3, material preparation, raw materials are configured in proportion and put into the injection molding machine to be melted into a molten state, the raw materials include silica gel and additives;

[0010] S4, injection molding, placing the pre-treated glass plate in the positioning groove, and inputting the molten silica gel into the injection molding cavity;

[0011] S5, vulcanization and cooling, heating the mold to vulcanize the silicone to form a stable silicone strip structure; then cooling the mold to shape the silicone strip;

[0012] S6, demoulding and post-processing, after the mold is cooled to room temperature, the glass half with the waterproof silicone strip is taken out of the mold, burrs are removed, and it is cleaned.

[0013] Preferably, in step S1, the mold includes a lower mold base, a mounting frame and an upper mold base, the upper surface of the lower mold base is provided with a positioning groove, the bottom of the mounting frame is open, the bottom of each side plate of the mounting frame is fixedly connected with a fixing seat, the fixing seat is inserted with a fixing screw, the lower mold base is provided with a fixing screw hole corresponding to the fixing screw, a glue injection tube is fixedly connected to the top plate of the mounting frame, the glue injection tube is connected to the discharge port of the injection molding machine, an exhaust hole is provided on the top plate of the mounting frame, the upper mold base is slidably connected to the top plate of the mounting frame, an injection cavity is formed between the upper mold base and the side plates of the mounting frame, a U-shaped mounting frame is fixedly connected to the mounting frame, a hollow tube is symmetrically fixedly connected to the upper mold base, the hollow tube is slidably connected to the top plate of the mounting frame, a positioning seat is fixedly connected to the hollow tube, and a spring is sleeved on the hollow tube below the top plate of the mounting frame.

[0014] Preferably, a resistance heating plate is fixedly connected to the position of each side surface inside the upper mold base.

[0015] Preferably, a serpentine cooling channel is provided in the upper mold base, and both ends of the cooling channel are connected to the hollow tube. It also includes a cooler, a water tank and a circulating pump. The inlet and outlet of the circulating pump are respectively connected to the water tank and the top of one of the hollow tubes through a hose, and the inlet and outlet of the cooler are respectively connected to the top of the other hollow tube and the water tank through a hose. The water tank is used to hold coolant.

[0016] Preferably, in step S2, the edge of the glass plate is chamfered.

[0017] Preferably, in step S3, the additives include vulcanizers, catalysts, pigments, plasticizers and anti-aging agents, and the weight percentages of silica gel and additives are: silica gel 90%-98%; vulcanizer 0.5%-3%; catalyst 0.1%-1%; pigment 0%-5%; plasticizer 0%-3%; anti-aging agent 0%-3%.

[0018] Preferably, in step S4, before injection molding, the mold is preheated at a temperature of 60 to 120° C. for a preheating time of 5 to 8 minutes.

[0019] Preferably, in step S5, the vulcanization temperature is 150-180° C., and the vulcanization time is 8-10 min.

[0020] The invention discloses an application of glass injection molding silicone prepared by a glass injection molding silicone preparation method, and the glass injection molding silicone is applied to a mobile phone glass waterproof case and a watch glass waterproof dial.

[0021] The beneficial effects of the present invention are as follows:

[0022] Improve waterproof performance: By optimizing mold design and injection molding process, the silicone strip can fit tightly on the glass plate to form an effective waterproof barrier, significantly improving the waterproof performance of electronic products.

[0023] Enhanced durability: The present invention adopts high-quality silicone raw materials and a reasonable ratio of additives, so that the prepared silicone strip has good elasticity, wear resistance and anti-aging properties, thereby extending the service life of electronic products.

[0024] Simplified production process: Through the integrated injection molding process, the silicone strip and the glass plate are tightly combined, avoiding the cumbersome operation of multiple processes in traditional waterproofing methods and improving production efficiency.

[0025] Improve product aesthetics: The injection-molded silicone strip is seamlessly connected to the glass plate, making the product appearance neater and more beautiful, meeting the aesthetic requirements of modern consumers for the appearance of electronic products.

[0026] Wide application: The glass injection-molded silicone prepared by the present invention can be widely used in electronic products such as mobile phone glass waterproof cases and watch glass waterproof dials, and can also be expanded to other occasions requiring waterproof sealing, such as automotive lamps, outdoor electronic equipment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 : A schematic diagram of a process for preparing glass injection molding silicone;

[0029] Figure 2 : Schematic diagram of the structure of glass injection molding silicone;

[0030] Figure 3 : Structural diagram of the mold in the mold closing state;

[0031] Figure 4 : Schematic diagram of the structure of the lower die base.

[0032] The reference numerals are as follows:

[0033] 100-glass plate, 200-silicone strip, 1-lower mold base, 11-positioning groove, 2-mounting frame, 21-fixing seat, 22-fixing screw, 23-fixing screw hole, 24-glue injection hose, 25-exhaust hole, 3-upper mold base, 31-injection cavity, 32-mounting frame, 33-hollow tube, 34-positioning seat, 35-spring, 41-resistance heating plate, 42-cooling channel, 43-cooler, 44-water tank, 45-circulation pump. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1-4 As shown, a method for preparing glass injection molding silicone and its application, the glass injection molding silicone is composed of a glass plate 100 and a silicone strip 200 compounded thereon;

[0036] The method for preparing glass injection molding silica gel comprises the following steps:

[0037] S1, mold design and production, design and produce a mold according to the size of the glass plate 100 and the size of the silicone strip 200 to be injection molded, the mold includes a positioning groove for positioning the glass plate 100 and an injection cavity for injection molding the silicone strip 200.

[0038] The mold includes a lower mold base 1, a mounting frame 2 and an upper mold base 3. A positioning groove 11 is provided on the upper surface of the lower mold base 1, and the bottom of the mounting frame 2 is open. A fixing seat 21 is fixedly connected to the bottom of each side plate of the mounting frame 2, and a fixing screw 22 is inserted on the fixing seat 21. A fixing screw hole 23 corresponding to the fixing screw 22 is provided on the lower mold base 1, and a glue injection tube 24 is fixedly connected to the top plate of the mounting frame 2, and the glue injection tube 24 is connected to the discharge port of the injection molding machine. An exhaust hole 25 is provided on the top plate of the mounting frame 2. The upper mold base 3 is slidably connected to the top plate of the mounting frame 2, and an injection cavity 31 is formed between the upper mold base 3 and the side plates of the mounting frame 2. A U-shaped mounting frame 32 is fixedly connected to the mounting frame 2, and a hollow tube 33 is symmetrically fixedly connected to the upper mold base 3. The hollow tube 33 is slidably connected to the top plate of the mounting frame 32, and a positioning seat 34 is fixedly connected to the hollow tube 33. A spring 35 is sleeved on the hollow tube 33 below the top plate of the mounting frame 32.

[0039] A resistance heating plate 41 is fixedly connected to the position of each side surface inside the upper mold base 3 .

[0040] A serpentine cooling channel 42 is provided in the upper mold base 3, and both ends of the cooling channel 42 are connected to the hollow tube 33. It also includes a cooler 43, a water tank 44 and a circulating pump 45. The inlet and outlet of the circulating pump 45 are respectively connected to the water tank 44 and the top of one of the hollow tubes 33 through a hose, and the inlet and outlet of the cooler 43 are respectively connected to the top of the other hollow tube 33 and the water tank 44 through a hose. The water tank 44 is used to contain coolant.

[0041] S2, pre-treating the glass plate 100, cleaning, decontamination and drying the glass plate 100 to ensure that the surface of the glass plate 100 is clean, flat, free of oil stains and impurities, so as to improve the adhesion between the silica gel and the glass plate 100 and the injection molding effect.

[0042] The edge of the glass plate 100 is chamfered to reduce the accumulation of silica gel material on the edge of the glass plate 100 during the injection molding process, thereby improving the aesthetics of the product and the injection molding effect.

[0043] S3, material preparation, raw materials are configured in proportion and put into the injection molding machine to be melted into a molten state. The raw materials include silicone and additives.

[0044] The additives include vulcanizers, catalysts, pigments, plasticizers and anti-aging agents. The weight percentage of silica gel and additives is as follows: silica gel 90%-98%; vulcanizer 0.5%-3%; catalyst 0.1%-1%; pigment 0%-5%; plasticizer 0%-3%; anti-aging agent 0%-3%.

[0045] S4 , injection molding, placing the pre-treated glass plate 100 in the positioning groove 11 , and inputting molten silica gel into the injection cavity 31 .

[0046] Before injection molding, the mold is preheated at a temperature of 60 to 120°C for 5 to 8 minutes to improve the fluidity of the silicone.

[0047] like Figure 3-Figure 4 As shown, firstly, the glass plate 100 is placed in the positioning groove 11, and then the mounting frame 2 is put on the outside of the glass plate 100, and the mounting frame 2 is pressed down. The glass plate 100 pushes the upper mold base 3 upward, and the spring 35 is compressed. The compression reaction force of the spring 35 acts on the upper mold base 3, so that the upper mold base 3 and the glass plate 100 are tightly attached until the bottom of the mounting frame 2 contacts the lower mold base 1, and the mounting frame 2 is fixed by the fixing screws 22.

[0048] The molten silica gel is squeezed out from the discharge port of the injection molding machine and enters the injection cavity 31 through the glue injection tube 24. The air in the injection cavity 31 is discharged through the exhaust hole 25 until the silica gel flows out of the exhaust hole 25 and the glue injection is stopped.

[0049] S5, vulcanization and cooling, the mold is heated to vulcanize the silicone to form a stable silicone strip 200 structure; then the mold is cooled to shape the silicone strip 200.

[0050] The vulcanization temperature is 150-180°C, and the vulcanization time is 8-10 minutes.

[0051] The silicone is heated by the resistance heating plate 41 to vulcanize the silicone. After the vulcanization is completed, the circulation pump 45 drives the coolant to flow in the cooling channel 42 to cool the mold so that the silicone strip 200 is formed.

[0052] S6, demoulding and post-processing, after the mold is cooled to room temperature, the glass half with the waterproof silicone strip 200 is taken out of the mold, burrs are removed, and it is cleaned.

[0053] The fixing screw 22 is screwed out from the fixing screw hole 23 to realize the mold opening operation, the glass plate 100 is connected to the injection-molded silicone strip 200 and taken out, the braid formed at the exhaust hole 25 is removed, and the burrs are removed.

[0054] The invention discloses an application of glass injection molding silicone prepared by a glass injection molding silicone preparation method, and the glass injection molding silicone is applied to a mobile phone glass waterproof case and a watch glass waterproof dial.

[0055] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for preparing glass injection molding silica gel, characterized in that: Glass injection silicone consists of a glass plate and a silicone strip compounded on it; The method for preparing glass injection molding silica gel comprises the following steps: S1, mold design and production, design and produce the mold according to the size of the glass plate and the size of the silicone strip to be injection molded, the mold includes a positioning groove for positioning the glass plate and an injection cavity for injection molding the silicone strip; S2, glass plate pretreatment, cleaning, decontamination and drying of the glass plate; S3, material preparation, raw materials are configured in proportion and put into the injection molding machine to be melted into a molten state, the raw materials include silica gel and additives; S4, injection molding, placing the pre-treated glass plate in the positioning groove, and inputting the molten silica gel into the injection molding cavity; S5, vulcanization and cooling, heating the mold to vulcanize the silicone to form a stable silicone strip structure; then cooling the mold to shape the silicone strip; S6, demoulding and post-processing, after the mold is cooled to room temperature, the glass half with the waterproof silicone strip is taken out of the mold, burrs are removed, and it is cleaned.

2. A method for preparing glass injection molding silica gel according to claim 1, characterized in that: In the step S1, the mold includes a lower mold base, a mounting frame and an upper mold base, the upper surface of the lower mold base is provided with a positioning groove, the bottom of the mounting frame is open, the bottom of each side plate of the mounting frame is fixedly connected with a fixing seat, the fixing seat is inserted with a fixing screw, the lower mold base is provided with a fixing screw hole corresponding to the fixing screw, a glue injection tube is fixedly connected to the top plate of the mounting frame, the glue injection tube is connected to the discharge port of the injection molding machine, an exhaust hole is provided on the top plate of the mounting frame, the upper mold base is slidably connected to the top plate of the mounting frame, an injection cavity is formed between the upper mold base and the side plates of the mounting frame, a U-shaped mounting frame is fixedly connected to the mounting frame, a hollow tube is symmetrically fixedly connected to the upper mold base, the hollow tube is slidably connected to the top plate of the mounting frame, a positioning seat is fixedly connected to the hollow tube, and a spring is sleeved on the hollow tube below the top plate of the mounting frame.

3. A method for preparing glass injection molding silica gel according to claim 2, characterized in that: A resistance heating plate is fixedly connected to the positions of the inner side of the upper die seat corresponding to each side.

4. A method for preparing glass injection molding silica gel according to claim 2, characterized in that: A serpentine cooling channel is provided in the upper mold base, and both ends of the cooling channel are connected to the hollow tube. The upper mold base also includes a cooler, a water tank and a circulating pump. The inlet and outlet of the circulating pump are respectively connected to the water tank and the top of one of the hollow tubes through a hose, and the inlet and outlet of the cooler are respectively connected to the top of the other hollow tube and the water tank through a hose. The water tank is used to hold coolant.

5. The method for preparing glass injection molding silica gel according to claim 1, characterized in that: In the step S2, the edge of the glass plate is chamfered.

6. The method for preparing glass injection molding silica gel according to claim 1, characterized in that: In step S3, the additives include vulcanizers, catalysts, pigments, plasticizers and anti-aging agents, and the weight percentage of silica gel and additives is: silica gel 90%-98%; vulcanizer 0.5%-3%; catalyst 0.1%-1%; pigment 0%-5%; plasticizer 0%-3%; anti-aging agent 0%-3%.

7. A method for preparing glass injection molding silica gel according to claim 1, characterized in that: In the step S4, before injection molding, the mold is preheated at a temperature of 60 to 120° C. for 5 to 8 minutes.

8. The method for preparing glass injection molding silica gel according to claim 1, characterized in that: In the step S5, the vulcanization temperature is 150-180° C., and the vulcanization time is 8-10 minutes.

9. Application of glass injection molding silica gel prepared by the method for preparing glass injection molding silica gel according to any one of claims 1 to 8, characterized in that: It is used in mobile phone glass waterproof cases and watch glass waterproof dials.

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