Hot-pressing jig

Abstract

The utility model provides a kind of hot-pressing fixture, it is applicable to the middle frame assembly of electronic equipment is carried out hot-pressing. Including lower die structure, side pressure mechanism and ejection mechanism. Lower die structure includes bottom plate and the bottom die of protruding out bottom plate, bottom die is provided with multiple movable inserts along its circumferential side, multiple movable inserts and bottom die form the inner cavity support part for supporting middle frame assembly, by adjusting the position of multiple movable inserts relative to bottom die to adjust the size of inner cavity support part. Side pressure mechanism is set on bottom plate, including multiple side pressure components, by multiple side pressure components to from multiple sides to middle frame assembly is positioned. Ejection mechanism is set on the bottom of bottom plate, including ejection power component and ejector pin, ejector pin is set on the output end of ejection power component and passes through bottom plate and bottom die, ejection power component acts to make ejector pin eject the middle frame assembly placed on inner cavity support part.

Description

[0001] Hot press fixture Technical Field

[0002] This utility model relates to the field of electronic equipment processing technology, and in particular to a hot pressing fixture. Background Technology

[0003] The mid-frame assembly is the internal load-bearing structure of electronic devices, generally consisting of metal and plastic parts. These parts are securely bonded to the tablet's mid-frame through heating and pressurization. The thermoforming of the tablet's mid-frame assembly primarily aims to pre-embed metal components within the plastic structure to enhance local strength, provide threaded connection points, improve heat dissipation, or achieve electromagnetic shielding. Pre-stamped small hardware parts (such as nuts, studs, clips, and metal reinforcing plates) are placed into a thermoforming mold. The upper mold of the thermoforming press presses down, heating and applying pressure to the hardware parts. Simultaneously, the mold heats the plastic mid-frame (or plastic substrate) located beneath the hardware parts, causing its surface to melt instantly. Under pressure, the molten plastic flows and encapsulates specific structures within the hardware parts (such as knurling, holes, and barbs), forming a strong mechanical interlock after cooling and solidification.

[0004] In existing technologies, the lower mold core of the hot press fixture is an integrated fixture, which does not provide adjustable support for the inner cavity of the middle frame assembly. However, the dimensions of the middle frame assembly will change during the hot pressing process. Controlling the machining allowance of the mold core to lock the product's length and width dimensions requires repeated fixture adjustments. Furthermore, because the product and fixture are tightly fitted, existing hot press fixtures are prone to causing a certain percentage of damage when removing the product after hot pressing, thus affecting overall efficiency.

[0005] Therefore, it is necessary to provide a hot press fixture that can adjust the internal cavity support and makes it easier to unload the product. Utility Model Content

[0006] The purpose of this invention is to provide a hot press fixture that can adjust the internal cavity support and makes it easier to unload the product.

[0007] To achieve the above objectives, this utility model provides a hot pressing fixture suitable for hot pressing the mid-frame assembly of electronic devices, comprising:

[0008] The lower mold core structure includes a base plate and a bottom mold core protruding from the base plate. Multiple movable inserts are arranged along the periphery of the bottom mold core. The multiple movable inserts and the bottom mold core form an inner cavity support for supporting the middle frame assembly. The size of the inner cavity support can be adjusted by adjusting the position of the multiple movable inserts relative to the bottom mold core.

[0009] A side-pressing mechanism, mounted on the base plate, includes multiple side-pressing components, which are used to position the middle frame assembly from multiple sides;

[0010] The ejection mechanism is located at the bottom of the base plate and includes an ejection power assembly and an ejector pin. The ejector pin is located at the output end of the ejection power assembly and passes through the base plate and the bottom mold core. The ejection power assembly is activated to eject the ejector pin from the middle frame assembly placed on the inner cavity support.

[0011] Compared with existing technologies, the hot pressing fixture of this invention is applicable to the hot pressing molding of mid-frame components for electronic devices such as tablet computers. The size of the inner cavity support portion for supporting the mid-frame component is adjustable, allowing for a better fit and improved molding effect. Furthermore, the mid-frame component can be ejected from the inner cavity support portion via an ejection mechanism, making unloading more convenient. The hot pressing fixture of this invention includes a lower mold core structure, a side pressing mechanism, and an ejection mechanism. The lower mold core structure includes a base plate and a bottom mold core protruding from the base plate. Multiple movable inserts are arranged along the periphery of the bottom mold core, forming an inner cavity support portion for supporting the mid-frame component. By adjusting the position of the multiple movable inserts relative to the bottom mold core, the size of the inner cavity support portion is adjusted, allowing for a better fit and improved molding effect. The side pressing mechanism includes multiple side pressing components, which position the mid-frame component from multiple sides to ensure better molding of the entire mid-frame component. The ejection mechanism can eject the middle frame assembly placed on the inner cavity support, making unloading more convenient and preventing damage to the middle frame assembly during unloading. The thermoforming fixture of this invention features an adjustable inner cavity support, resulting in better overall molding and easier unloading.

[0012] Preferably, the movable insert has an adjustment hole, and a fixing member is provided in the adjustment hole for fixing the movable insert. The position of the movable insert relative to the bottom mold core is adjusted by the fixing member being located at different positions in the adjustment hole.

[0013] Preferably, the adjusting hole is provided with a receiving groove for accommodating the fixing member, the fixing member is located in the receiving groove and is flush with or lower than the top surface of the movable insert.

[0014] Preferably, one end of the fastener passes through the adjustment hole and is installed inside the base plate.

[0015] Preferably, the top surface of the bottom mold core is quadrilateral, and each of the four sides of the bottom mold core is provided with a movable insert, and each of the four sides of the bottom mold core is provided with a corresponding side pressure component.

[0016] Preferably, the movable insert has a first stepped surface on the side facing the side pressing component, and the side pressing component has a second stepped surface. The first stepped surface and the second stepped surface cooperate to allow the side pressing component to press against the middle frame component from the side.

[0017] Preferably, the side pressure assembly includes a side pressure block and a side pressure cylinder. The side pressure block is slidably mounted on the base plate via a slide rail, and the side pressure block is mounted at the output end of the side pressure cylinder. The side pressure cylinder is activated to drive the side pressure block to slide along the slide rail toward or away from the bottom mold core.

[0018] Preferably, the ejection mechanism also includes a fixed plate and a support plate. The fixed plate is located at the output end of the ejection power assembly, the support plate is connected to the fixed plate, and multiple ejector pins are fixed on the support plate. When the ejection power assembly is activated, the fixed plate drives the support plate to move up and down, so that the multiple ejector pins eject the middle frame assembly synchronously.

[0019] Preferably, both the base plate and the bottom mold core are provided with through holes for ejector pins to pass through, and the ejector pins slide along the through holes to eject the middle frame assembly on the inner cavity support.

[0020] Preferably, it also includes a hot pressing mechanism, which is vertically positioned above the bottom mold core. The hot pressing mechanism operates to hot press the middle frame assembly on the inner cavity support. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of a hot pressing fixture provided in one embodiment of the present invention.

[0023] Figure 2 yes Figure 1 The structural diagram with the hot pressing mechanism removed is shown in the image.

[0024] Figure 3 yes Figure 2 Structural diagram of the middle base plate and bottom mold core.

[0025] Figure 4 yes Figure 2 Structural diagram of the movable insert.

[0026] Figure 5 yes Figure 4 A cross-sectional view of the movable insert and the fastener mating.

[0027] Figure 6 yes Figure 2 Structural diagram of the middle-side pressure assembly.

[0028] Figure 7 yes Figure 2 Structural diagram of the ejector mechanism.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Hot pressing fixture; 101. Middle frame assembly;

[0031] 10. Lower mold core structure; 11. Base plate; 110. Through hole; 111. First mounting part; 112. Second mounting part; 12. Bottom mold core; 120. Inner cavity support part; 13. Movable insert; 131. Adjustment hole; 1311. Receiving groove; 132. First stepped surface; 14. Fixing component;

[0032] 20. Side pressure mechanism; 21. Side pressure assembly; 211. Side pressure cylinder; 212. Side pressure block; 2121. Second step surface;

[0033] 30. Ejection mechanism; 31. Ejection power assembly; 32. Ejector pin; 33. Fixing plate; 34. Support plate;

[0034] 40. Hot pressing mechanism. Detailed Implementation

[0035] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0036] Please see Figures 1 to 2This utility model provides a hot pressing fixture 100, suitable for hot pressing the mid-frame assembly 101 of electronic devices such as flat-panel telegraphs. The hot pressing fixture 100 includes a lower mold core structure 10, a side pressing mechanism 20, and an ejection mechanism 30. The lower mold core structure 10 includes a base plate 11 and a bottom mold core 12 protruding from the base plate 11. The base plate 11 and the bottom mold core 12 can be an integral structure. The bottom mold core 12 has multiple movable inserts 13 arranged along its periphery, and the bottom mold core 12 includes four sides, each with a movable insert 13. The multiple movable inserts 13 and the bottom mold core 12 form an inner cavity support portion 120 for supporting the mid-frame assembly 101, that is, the mid-frame assembly 101 is fitted onto the multiple movable inserts 13 and the bottom mold core 12. The size of the inner cavity support portion 120 can be adjusted by adjusting the position of the multiple movable inserts 13 relative to the bottom mold core 12. Understandably, during the hot pressing process, the size of the middle frame assembly 101 will shrink or increase within a certain range. If the size of the inner cavity support 120 cannot be adjusted, the length and width dimensions of the product need to be calculated and locked by controlling the machining allowance of the bottom mold core 12 when molding the bottom mold core 12. This requires repeated adjustments to the fixture, and the fit is not ideal. Movable inserts 13 are provided around the bottom mold core 12, and the position of the movable inserts 13 can be adjusted according to the actual use, so that the entire inner cavity support 120 can better support the middle frame assembly 101. On the other hand, the side pressing mechanism 20 is provided on the base plate 11 and includes multiple side pressing components 21, which are used to position the middle frame assembly 101 from multiple sides. Each side of the inner cavity support 120 can be provided with a side pressure component 21. The middle frame component 101 is sleeved on the inner cavity support 120, and then the side pressure component 21 acts on the middle frame component 101 to position the middle frame component 101 from the side, so as to better perform thermoforming. In addition, the ejection mechanism 30 is provided at the bottom of the base plate 11, including an ejection power component 31 and an ejector pin 32. The ejector pin 32 is provided at the output end of the ejection power component 31 and passes through the base plate 11 and the bottom mold core 12. The ejection power component 31 is activated to eject the middle frame component 101 placed on the inner cavity support 120. The ejection mechanism 30 makes it easier to unload the middle frame component 101 and avoids damaging the workpiece when manually unloading it.

[0037] Compared with existing technologies, the hot press fixture 100 of this invention is suitable for hot press molding of the mid-frame assembly 101 of electronic devices such as tablet computers. The size of the inner cavity support portion 120 used to support the mid-frame assembly 101 is adjustable, allowing it to fit the mid-frame assembly 101 more closely and resulting in better molding. In addition, the mid-frame assembly 101 can be ejected from the inner cavity support portion 120 for unloading via the ejection mechanism 30, making unloading more convenient. The hot press fixture 100 of this invention includes a lower mold core structure 10, a side pressure mechanism 20, and an ejection mechanism 30. The lower mold core structure 10 includes a base plate 11 and a bottom mold core 12 protruding from the base plate 11. Multiple movable inserts 13 are arranged along the periphery of the bottom mold core 12. These movable inserts 13 and the bottom mold core 12 form an inner cavity support portion 120 for supporting the middle frame assembly 101. By adjusting the position of the multiple movable inserts 13 relative to the bottom mold core 12, the size of the inner cavity support portion 120 is adjusted, allowing the inner cavity support portion 120 to better fit the middle frame assembly 101, resulting in better molding. The side pressing mechanism 20 includes multiple side pressing components 21, which position the middle frame assembly 101 from multiple sides, enabling better molding of the entire middle frame assembly 101. The ejection mechanism 30 ejects the middle frame assembly 101 placed on the inner cavity support portion 120, making unloading more convenient and preventing damage to the middle frame assembly 101 during unloading. The hot pressing fixture 100 of this utility model has an adjustable inner cavity support part 120, which results in better overall molding and more convenient material cutting.

[0038] Please see Figures 3 to 5 In some optional embodiments, the movable insert 13 has an adjustment hole 131, and a fixing member 14 for fixing the movable insert 13 is provided in the adjustment hole 131. The fixing member 14 passes through the adjustment hole 131 and is fixed to the base plate 11. The adjustment hole 131 is elongated or elliptical, and the position of the movable insert 13 relative to the bottom mold core 12 is adjusted by the different positions of the fixing member 14 in the adjustment hole 131. Loosening the fixing member 14 allows the movable insert 13 to move along the fixing member 14 through the adjustment hole 131, thereby adjusting the position of the movable insert 13. The adjustable range of the movable insert 13 is the range of movement of the fixing member 14 in the adjustment hole 131. Specifically, the adjustment hole 131 is provided with a receiving groove 1311 for accommodating the fixing member 14. The fixing member 14 is located in the receiving groove 1311 and is flush with or lower than the top surface of the movable insert 13. The recess 1311 prevents the fastener 14 from protruding from the movable insert 13 and affecting the molding of the middle frame assembly 101. One end of the fastener 14 passes through the adjustment hole 131 and is installed in the base plate 11, ensuring a secure connection.

[0039] Please see Figures 1 to 3In this embodiment, the inner cavity support portion 120 of the hot press fixture 100 is used to support the middle frame assembly 101 of the flat plate. The bottom mold core 12 matches the middle frame assembly 101. The top surface of the bottom mold core 12 is quadrilateral, and each of the four sides of the bottom mold core 12 is provided with a movable insert 13, which allows for better adjustment of the size of the entire inner cavity support portion 120. Furthermore, each of the four sides of the bottom mold core 12 is correspondingly provided with a side pressure component 21 to better position the middle frame assembly 101, resulting in a better molding effect. In other embodiments, if the middle frame assembly 101 has other shapes, the bottom mold core 12 and the movable insert 13 will have other shapes that match the product's shape.

[0040] Please see Figures 4 to 6 In some optional embodiments, the movable insert 13 has a first stepped surface 132 on its surface facing the side-pressing assembly 21, and the side-pressing assembly 21 has a second stepped surface 2121. The first stepped surface 132 and the second stepped surface 2121 cooperate to allow the side-pressing assembly 21 to press against the middle frame assembly 101 from the side. It is understood that the movable insert 13 has the first stepped surface 132, and the side-pressing assembly 21 has the second stepped surface 2121. The first stepped surface 132 can guide the second stepped surface 2121 closer to the middle frame assembly 101, and through the cooperation of the first stepped surface 132 and the second stepped surface 2121, the side-pressing assembly 21 can better position the middle frame assembly 101 from the side. Specifically, the side-pressing assembly 21 includes a side-pressing block 212 and a side-pressing cylinder 211. The side-pressing block 212 is slidably mounted on the base plate 11 via a slide rail, and the second stepped surface 2121 is disposed on the side-pressing block 212. The base plate 11 has multiple first mounting portions 111 for mounting side pressure cylinders 211, and multiple second mounting portions 112 for mounting slide rails. The side pressure block 212 is mounted on the output end of the side pressure cylinder 211. The side pressure cylinder 211 actuates to drive the side pressure block 212 to slide along the slide rail towards or away from the bottom mold core 12. The side pressure block 212 approaches the middle frame assembly 101 to position the middle frame assembly 101, and the side pressure block moves away from the middle frame assembly 101 to allow for material feeding of the middle frame assembly 101.

[0041] Please see Figures 1 to 3 and Figure 7In some optional embodiments, the ejection mechanism 30 further includes a fixed plate 33 and a support plate 34. The fixed plate 33 is disposed at the output end of the ejection power assembly 31, and the support plate 34 is connected to the fixed plate 33. The ejection mechanism 30 includes multiple ejection power assemblies 31, which synchronously drive the fixed plate 33 to move. Multiple ejector pins 32 are fixed to the support plate 34. The action of the multiple ejection power assemblies 31 causes the fixed plate 33 to drive the support plate 34 to move up and down, allowing the multiple ejector pins 32 to move synchronously and eject the middle frame assembly 101. When the ejection power assembly 31 moves, the fixed plate 33 moves accordingly and acts on the support plate 34. All the ejector pins 32 are disposed on the support plate 34. The action of the fixed plate 33 on the support plate 34 causes the support plate 34 to drive all the ejector pins 32 to synchronously push the middle frame assembly 101 out of the material. This results in a better pushing effect and avoids damage to the middle frame assembly 101 from a single ejector pin 32. The ejection mechanism 30 has a reasonable structure and good material feeding effect. On the other hand, through holes 110 are also provided on both the base plate 11 and the bottom mold core 12 for ejector pins 32 to pass through. The ejector pins 32 slide along the through holes 110 to eject the middle frame assembly 101 on the inner cavity support 120. The through holes 110 on the base plate 11 are located at the mounting position of the movable insert 13, so that multiple ejector pins 32 can push and unload the middle frame assembly 101 within the inner cavity support 120. Multiple ejector pins 32 are evenly distributed within the inner cavity support 120.

[0042] Please see Figure 1 In some optional embodiments, a hot pressing mechanism 40 is also included, which is vertically disposed above the bottom mold core 12. The hot pressing mechanism 40 is operated to hot press the middle frame assembly 101 on the inner cavity support 120.

[0043] like Figures 1 to 7As shown, the hot press fixture 100 of this utility model is suitable for hot press molding of the mid-frame assembly 101 of electronic devices such as tablet computers. The size of the inner cavity support portion 120 used to support the mid-frame assembly 101 is adjustable, allowing it to fit the mid-frame assembly 101 more closely and resulting in better molding. In addition, the mid-frame assembly 101 can be ejected from the inner cavity support portion 120 for unloading via the ejection mechanism 30, making unloading more convenient. The hot press fixture 100 of this utility model includes a lower mold core structure 10, a side pressure mechanism 20, an ejection mechanism 30, and a hot press mechanism 40. The lower mold core structure 10 includes a base plate 11 and a bottom mold core 12 protruding from the base plate 11. Multiple movable inserts 13 are arranged along the periphery of the bottom mold core 12, forming an inner cavity support portion 120 for supporting the middle frame assembly 101. By adjusting the position of the multiple movable inserts 13 relative to the bottom mold core 12, the size of the inner cavity support portion 120 is adjusted, allowing the inner cavity support portion 120 to better fit the middle frame assembly 101, resulting in better molding. The side pressing mechanism 20 includes multiple side pressing components 21, which position the middle frame assembly 101 from multiple sides, enabling better molding of the entire middle frame assembly 101. The ejection mechanism 30 drives multiple ejector pins 32 to simultaneously eject the middle frame assembly 101 placed on the inner cavity support portion 120, making unloading more convenient and preventing damage to the middle frame assembly 101 during unloading. The hot pressing mechanism 40 performs hot pressing molding on the middle frame assembly 101. The hot pressing fixture 100 of this utility model has an adjustable inner cavity support part 120, which results in better overall molding and more convenient material cutting.

[0044] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A hot pressing fixture, suitable for hot pressing the mid-frame assembly of electronic devices, characterized in that, include: The lower mold core structure includes a base plate and a bottom mold core protruding from the base plate. The bottom mold core is provided with a plurality of movable inserts along its periphery. The plurality of movable inserts and the bottom mold core form an inner cavity support portion for supporting the middle frame assembly. The size of the inner cavity support portion can be adjusted by adjusting the position of the plurality of movable inserts relative to the bottom mold core. A side-pressing mechanism, disposed on the base plate, includes multiple side-pressing components, which are used to position the middle frame assembly from multiple sides; An ejection mechanism is provided at the bottom of the base plate, including an ejection power assembly and an ejector pin. The ejector pin is provided at the output end of the ejection power assembly and passes through the base plate and the bottom mold core. The ejection power assembly is activated to eject the ejector pin from the middle frame assembly placed on the inner cavity support.

2. The hot pressing fixture according to claim 1, characterized in that, The movable insert has an adjustment hole, and a fixing member is provided in the adjustment hole for fixing the movable insert. The position of the movable insert relative to the bottom mold core is adjusted by the fixing member being located at different positions in the adjustment hole.

3. The hot pressing fixture according to claim 2, characterized in that, The adjusting hole is provided with a receiving groove for accommodating the fixing member. The fixing member is located in the receiving groove and is flush with or lower than the top surface of the movable insert.

4. The hot pressing fixture according to claim 2, characterized in that, One end of the fastener passes through the adjustment hole and is installed inside the base plate.

5. The hot pressing fixture according to claim 1, characterized in that, The top surface of the bottom mold core is quadrilateral, and the four sides of the bottom mold core are provided with the movable inserts, and the four sides of the bottom mold core are correspondingly provided with the side pressure components.

6. The hot pressing fixture according to claim 1, characterized in that, The movable insert has a first stepped surface on its surface facing the side-pressing component, and the side-pressing component has a second stepped surface. The first stepped surface and the second stepped surface cooperate to allow the side-pressing component to press against the middle frame component from the side.

7. The hot pressing fixture according to claim 1, characterized in that, The side pressure assembly includes a side pressure block and a side pressure cylinder. The side pressure block is slidably mounted on the base plate via a slide rail, and the side pressure block is mounted at the output end of the side pressure cylinder. The side pressure cylinder is activated to drive the side pressure block to slide along the slide rail closer to or further away from the bottom mold core.

8. The hot pressing fixture according to claim 1, characterized in that, The ejection mechanism further includes a fixed plate and a support plate. The fixed plate is disposed at the output end of the ejection power component, and the support plate is connected to the fixed plate. A plurality of ejector pins are fixed on the support plate. The ejection power component is activated to cause the fixed plate to drive the support plate to move up and down, so that the plurality of ejector pins simultaneously eject the middle frame component.

9. The hot pressing fixture according to claim 1, characterized in that, Both the base plate and the bottom mold core are provided with through holes for the ejector pin to pass through, and the ejector pin slides along the through holes to eject the middle frame assembly on the inner cavity support.

10. The hot pressing fixture according to claim 1, characterized in that, It also includes a hot pressing mechanism, which is vertically positioned above the bottom mold core. The hot pressing mechanism operates to hot press the middle frame assembly on the inner cavity support.

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