Glue pouring mold

Abstract

The utility model discloses a glue pouring mold which is used for carrying out glue pouring sealing on a component, the glue pouring mold comprises a body, the body can be combined with the component to form a sealing glue cavity and a box dam glue cavity in a surrounding mode, the body is provided with a box dam glue groove, and the box dam glue groove surrounds at least part of space of the box dam glue cavity. The body comprises box dam ribs for forming the inner side wall face of the box dam glue groove, and part of the box dam ribs form part of the inner wall face of the sealing glue cavity. The glue pouring mold disclosed by the utility model has the advantages of high glue pouring reliability and low probability of abnormal glue overflow when a component with a segment difference is subjected to glue pouring.

Description

Technical Field

[0001] The utility model relates to the technical field of glue pouring and molding, in particular to a glue pouring mold. Background Art

[0002] In order to achieve a narrow-frame appearance, screens of electronic devices such as mobile phones and tablets usually adopt LIPO (Lowinjection pressure overmolding) technology. The processes related to LIPO technology include the process of sealing the screen made of it with glue, which usually uses a mold and a screen to form a sealing cavity between the two for injecting sealant. However, in the related art, due to the assembly position tolerance of the FPC on the screen, a step difference is easily formed here, and then when the mold and the screen are closed, it is easy to form a wide gap channel connected to the sealing cavity at the step difference. When the sealing cavity is filled with glue, it is easy to cause glue overflow at the gap channel, which has the defect of causing damage to the screen and its peripheral devices. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a glue pouring mold, which has the advantages of high glue pouring reliability and low probability of glue overflow when pouring glue on components with step differences.

[0005] The glue pouring mold of the embodiment of the present utility model is used for performing glue pouring and sealing on a component. The glue pouring mold includes a main body, which can be molded with the component and surround a sealing glue cavity and a dam glue cavity. The main body is provided with a dam glue groove, and the dam glue groove surrounds at least part of the space of the dam glue cavity. The main body includes dam ribs that form the inner wall of the dam glue groove, and part of the dam ribs form part of the inner wall of the sealing glue cavity.

[0006] According to the glue pouring mold of the embodiment of the present invention, the main body includes a dam rib. After the main body and the component are molded together, the dam rib of the main body is pressed against the step position of the component. By providing a dam glue groove on the main body, dam glue with lower fluidity than the sealant can be first dotted into the dam glue groove, and then the main body and the component are molded together. At this time, the dam rib and the dam glue overflowing from the dam glue groove can achieve the sealing of the gap at the step. In the process of pouring the sealant into the sealant cavity, the sealant is less likely to overflow from the step position of the component. In addition, due to its poor fluidity, the dam glue will not overflow too much under the pressure of the sealant. This ensures the reliability of the glue pouring seal while effectively avoiding damage to the components on the component due to excessive glue overflow.

[0007] In some embodiments, the cross-sectional area of ​​the dam glue groove gradually increases or increases in a stepwise manner from the groove bottom toward the groove opening, and the cross-sectional area is perpendicular to the depth direction of the dam glue groove.

[0008] In some embodiments, a sealing adhesive groove is provided on the main body, and the sealing adhesive groove forms at least a portion of the space of the sealing adhesive cavity.

[0009] In some embodiments, the main body also includes a base and a sealing rib, the sealing rib and the dam rib are arranged on the same side of the base, the dam rib includes a first partition rib and a second partition rib, the base, the sealing rib and the first partition rib are formed around the sealing glue groove, and the base, the first partition rib and the second partition rib are formed around the dam glue groove.

[0010] In some embodiments, the main body also includes a height limiting step, which is arranged on the side of the second partition rib away from the dam glue groove, the height limiting step has a first side opposite to the base, the second partition rib has a second side opposite to the base, and the first side is located on the side of the second side facing the base in the depth direction of the dam glue groove.

[0011] In some embodiments, the first side surface and the second side surface are parallel to each other, and a distance between the first side surface and the second side surface is h, where h≤0.2 mm.

[0012] In some embodiments, the first side surface is an inclined surface at an angle to the second side surface, the minimum spacing between the first side surface and the second side surface in the depth direction of the dam glue groove is less than or equal to 0, and the maximum spacing between the first side surface and the second side surface in the depth direction of the dam glue groove is less than or equal to 0.2 mm.

[0013] In some embodiments, the minimum dimension of the height-limiting step in the direction from the center of the dam glue groove toward the edge is d, wherein 1.5 mm ≤ d ≤ 2 mm.

[0014] In some embodiments, the height-limiting step extends along the circumference of the dam glue groove, and opposite ends of the height-limiting step along the circumference of the dam glue groove both extend to the side surfaces of the sealing rib.

[0015] In some embodiments, the cross-sectional outer contour of the dam glue groove is circular or rectangular. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a glue-filling mold according to an embodiment of the present invention.

[0017] Figure 2It is a schematic diagram of a glue pouring mold and dam glue according to an embodiment of the present utility model.

[0018] Figure 3 This is a schematic diagram of the component after glue sealing.

[0019] Reference numerals:

[0020] 1. Main body; 11. Base; 12. Dam reinforcement; 121. First partition reinforcement; 122. Second partition reinforcement; 123. Dam glue groove; 13. Sealing reinforcement; 131. Sealing glue groove; 14. Height-limiting step; 2. Component; 21. FPC; 3. Dam glue; 4. Sealant. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] The following combination Figure 1-Figure 3 The glue-filling mold according to the embodiment of the present utility model is described.

[0023] The glue pouring mold of the embodiment of the present utility model is used for performing glue pouring and sealing on the component 2. The glue pouring mold includes a main body 1, which can be molded with the component 2 and surround the molding sealing glue cavity and the dam glue cavity. The main body 1 is provided with a dam glue groove 123, and the dam glue groove 123 surrounds at least part of the space of the molding dam glue cavity. The main body 1 includes a dam rib 12 on the inner wall surface of the molding dam glue groove 123, and part of the dam rib 12 forms part of the inner wall surface of the molding sealing glue cavity.

[0024] According to the glue pouring mold of the embodiment of the present invention, the main body 1 includes a dam rib 12. After the main body 1 and the component 2 are molded together, the dam rib 12 of the main body 1 is pressed against the step position of the component 2. By providing a dam glue groove 123 on the main body 1, the dam glue 3 with a lower fluidity than the sealant 4 can be first dotted into the dam glue groove 123, and then the main body 1 and the component 2 are molded together. At this time, the dam rib 12 and the dam glue 3 overflowing from the dam glue groove 123 can achieve the sealing of the gap at the step. In the process of pouring the sealant 4 into the sealant cavity, the sealant 4 is less likely to overflow from the step position of the component 2. In addition, due to its poor fluidity, the dam glue 3 will not overflow too much under the pressure of the sealant 4. This ensures the reliability of the glue pouring seal while effectively avoiding damage to the components on the component 2 due to excessive glue overflow.

[0025] It should be noted that after the glue filling and sealing operation of the component 2 is completed, that is, after the main body 1 is separated from the component 2, the dam glue 3 is bonded to the component 2, and the sealant 4 is used to ensure the waterproof sealing performance of the component 2. In addition, the glue filling mold of this embodiment is a liquid silicone rubber (LSR) mold, the sealant 4 is a liquid silicone rubber with a lower viscosity, and the dam glue 3 can be any structural glue with a viscosity greater than that of the sealant 4. The component 2 includes but is not limited to the screen of a mobile phone or tablet, such as Figure 3 As shown, the component 2 can be a screen, and the screen has a step difference due to the assembly tolerance of the FPC 21. After the main body 1 and the screen are molded together, the dam rib 12 is pressed against the top of the FPC 21.

[0026] In some embodiments, the cross-sectional area of ​​the dam glue groove 123 increases gradually or in a stepwise manner from the groove bottom toward the groove opening, and the cross-sectional area is perpendicular to the depth direction of the dam glue groove 123 .

[0027] This setting effectively reduces the contact area between the dam glue 3 and the inner wall surface of the dam glue groove 123, ensuring that the contact area between the dam glue 3 and the component 2 after solidification is greater than the contact area between the dam glue 3 and the main body 1, and also avoids the inner wall surface of the dam glue groove 123 preventing the internal dam glue 3 from escaping from the dam glue groove 123, thereby ensuring that after the main body 1 is demoulded, the dam glue 3 will remain smoothly at the step difference of the component 2, thereby ensuring the waterproof sealing performance of the component 2.

[0028] Specifically, if Figure 1 As shown, the cross-sectional area of ​​the dam glue groove 123 gradually increases from the groove bottom toward the groove mouth, and the dam glue groove 123 is divided into two sections along its depth direction, and the slope of the inner wall surface of the upper section is greater than the slope of the inner wall surface of the lower section.

[0029] In some embodiments, as Figure 1 and Figure 2 As shown, a sealing adhesive groove 131 is provided on the main body 1 , and the sealing adhesive groove 131 forms at least a portion of the space of the sealing adhesive cavity.

[0030] The design of the sealant groove 131 on the main body 1, on the one hand, effectively increases the cross-sectional area of ​​the sealant cavity, making it convenient for the sealant 4 to quickly and reliably fill the sealant cavity; on the other hand, it can form a larger volume of sealant 4 on the component 2 according to the glue filling and sealing requirements of the component 2, and the sealant 4 has a higher sealing reliability on the component 2.

[0031] In some embodiments, the main body 1 also includes a base 11 and a sealing rib 13. The sealing rib 13 and the dam rib 12 are arranged on the same side of the base 11. The dam rib 12 includes a first partition rib 121 and a second partition rib 122. The base 11, the sealing rib 13 and the first partition rib 121 surround the molded sealing rubber groove 131. The base 11, the first partition rib 121 and the second partition rib 122 surround the molded dam rubber groove 123.

[0032] At this time, only the first partition rib 121 separates the dam glue groove 123 and the sealing glue groove 131. The dam glue groove 123 and the sealing glue groove 131 are easy to form, and the distance between the two can be set shorter, so that the dam glue 3 has higher reliability in preventing the sealing glue 4 from overflowing.

[0033] Specifically, the dam ribs 12 , the sealing ribs 13 and the base 11 are integrally formed.

[0034] In some embodiments, as Figure 1 and Figure 2 As shown, the main body 1 also includes a height limiting step 14, which is arranged on the side of the second partition rib 122 away from the dam glue groove 123, and the height limiting step 14 has a first side opposite to the base 11, and the second partition rib 122 has a second side opposite to the base 11, and the first side is located on the side of the second side facing the base 11 in the depth direction of the dam glue groove 123.

[0035] When the sealing glue cavity is being poured with glue, the sealant 4 will apply a certain pressure to the dam glue 3, causing the dam glue 3 to overflow from the gap between the second partition 122 and the component 2. At this time, by setting the height limiting step 14, the gap between the height limiting step 14 and the component 2 is effectively reduced, thereby making the thickness of the dam glue 3 entering the gap lower and less likely to affect the performance of the component 2.

[0036] Specifically, the height-limiting step 14 and the second partition rib 122 are arranged on the same reference plane of the base 11 , and the maximum height of the height-limiting step 14 is less than or equal to the height of the second partition rib 122 .

[0037] In some embodiments, the first side surface and the second side surface are parallel to each other, and a distance between the first side surface and the second side surface is h, where h≤0.2 mm.

[0038] As a result, the thickness of the dam glue 3 overflowing between the first side surface and the component 2 does not exceed 0.2 mm, further preventing the dam glue 3 from being too thick and affecting the assembly of the component 2 and other components, and effectively preventing the dam glue 3 from damaging other components in the component 2.

[0039] Specifically, the distance between the first side surface and the second side surface may be 0.1 mm, 0.15 mm, and 0.2 mm.

[0040] In some embodiments, the first side surface is an inclined surface angled with the second side surface, the minimum spacing between the first side surface and the second side surface in the depth direction of the dam glue groove 123 is less than or equal to 0, and the maximum spacing between the first side surface and the second side surface in the depth direction of the dam glue groove 123 is less than or equal to 0.2 mm.

[0041] This setting ensures that the outer surface of the dam glue 3 located between the second partition rib 122 and the component 2 and the outer surface of the dam glue 3 located between the height limiting step 14 and the component 2 are smoothly connected, or produce a smaller step difference, thereby effectively reducing the probability of the dam glue 3 being interfered with, and effectively ensuring the bonding reliability of the dam glue 3 on the component 2.

[0042] Specifically, the first side surface and the second side surface are smoothly connected, and the first side surface may be an inclined surface or an arc surface tangent to the second side surface.

[0043] In some embodiments, the minimum dimension of the height limiting step 14 in the direction from the center toward the edge of the dam glue groove 123 is d, where 1.5 mm≤d≤2 mm.

[0044] This arrangement, on the one hand, ensures that the height limiting step 14 has a sufficient distribution area to ensure that the dam glue 3 will not continue to overflow after passing through the gap between the height limiting step 14 and the component 2 and damage the components on the component 2. On the other hand, it also avoids the distribution area of ​​the height limiting step 14 being too large to increase the probability of interference with other components on the component 2, and also effectively reduces the production cost of the glue pouring mold.

[0045] Specifically, the minimum size of the height limiting step 14 in the direction from the center of the dam glue groove 123 toward the edge can be 1.5mm, 1.7mm and 2mm. Figure 1 and Figure 2 As shown, the height limiting steps 14 located in different directions have different sizes along the center of the dam glue groove 123 toward the edge. On the basis of ensuring the distribution area of ​​the height limiting steps 14, it is preferred to ensure that the height limiting steps 14 do not interfere with the components on the component 2.

[0046] In some embodiments, as Figure 1 and Figure 2 As shown, the height limiting step 14 extends along the circumference of the dam glue groove 123 , and both opposite ends of the height limiting step 14 along the circumference of the dam glue groove 123 extend to the side surfaces of the sealing rib 13 .

[0047] This ensures that the outermost edge of the dam glue 3 overflowing from the dam glue groove 123 stays between the height limiting step 14 and the component 2, ensuring that the thickness of the dam glue 3 at any position does not exceed 0.2 mm.

[0048] In some embodiments, the cross-sectional outer contour of the dam glue groove 123 is any one of a circle, a rectangle, and an irregular shape.

[0049] As long as the dam ribs 12 surrounding the molded dam glue groove 123 can be pressed against the step difference of the component 2 after the main body 1 and the component 2 are molded together, the anti-overflow performance of the dam glue 3 can be effectively guaranteed.

[0050] Specifically, if Figure 1 and Figure 2 As shown, the cross section of the dam glue groove 123 is substantially rectangular, and the second partition rib 122 is substantially U-shaped.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0056] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A glue pouring mold for performing glue pouring and sealing on a component, characterized in that: The glue pouring mold includes a main body, which can be molded with the component and surround the sealing glue cavity and the dam glue cavity. The main body is provided with a dam glue groove, and the dam glue groove surrounds at least part of the space of the dam glue cavity. The main body includes dam ribs that form the inner wall of the dam glue groove, and part of the dam ribs forms part of the inner wall of the sealing glue cavity.

2. The glue-filling mold according to claim 1, characterized in that: The cross-sectional area of ​​the dam glue groove gradually increases or increases in a stepwise manner from the groove bottom toward the groove opening, and the cross-sectional area is perpendicular to the depth direction of the dam glue groove.

3. The glue-filling mold according to claim 1, characterized in that: The body is provided with a sealing adhesive groove, and the sealing adhesive groove forms at least a portion of the space of the sealing adhesive cavity.

4. The glue-filling mold according to claim 3, characterized in that: The main body also includes a base and a sealing rib, the sealing rib and the dam rib are arranged on the same side of the base, the dam rib includes a first partition rib and a second partition rib, the base, the sealing rib and the first partition rib are formed around the sealing glue groove, and the base, the first partition rib and the second partition rib are formed around the dam glue groove.

5. The glue-filling mold according to claim 4, characterized in that: The main body also includes a height limiting step, which is arranged on the side of the second partition rib away from the dam glue groove. The height limiting step has a first side opposite to the base, and the second partition rib has a second side opposite to the base. The first side is located on the side of the second side facing the base in the depth direction of the dam glue groove.

6. The glue-filling mold according to claim 5, characterized in that: The first side surface and the second side surface are parallel to each other, and a distance between the first side surface and the second side surface is h, where h≤0.2 mm.

7. The glue-filling mold according to claim 5, characterized in that: The first side surface is an inclined surface at an angle to the second side surface. The minimum distance between the first side surface and the second side surface in the depth direction of the dam glue groove is less than or equal to 0, and the maximum distance between the first side surface and the second side surface in the depth direction of the dam glue groove is less than or equal to 0.2 mm.

8. The glue-filling mold according to claim 5, characterized in that: The minimum dimension of the height-limiting step in the direction from the center of the dam rubber groove toward the edge is d, wherein 1.5 mm ≤ d ≤ 2 mm.

9. The glue-filling mold according to claim 5, characterized in that: The height-limiting step extends along the circumference of the dam glue groove, and both opposite ends of the height-limiting step along the circumference of the dam glue groove extend to the side surfaces of the sealing rib.

10. The glue-filling mold according to claim 1, characterized in that: The outer contour of the cross section of the dam rubber groove is circular or rectangular.

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