Ultra-thin die casting forming die
By designing a die-casting runner system and reinforced structure with multiple side feeds in ultra-thin die-casting molds, the problems of uneven meat thickness and poor molding in thin-walled areas during the molding process are solved, and uniform molding and high yield of the product are achieved.
Patent Information
- Application Number
- CN202411892451.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-03-14
AI Technical Summary
The prior art is difficult to make the meat thickness of the product even during the molding process, and it is prone to defective conditions such as shrinkage, cold material, cracking, etc., especially when the mold is discharged in the thin-walled area.
An ultra-thin die cast mold is designed, using a die-cast runner system, including a forward runner assembly and a lateral runner assembly, which is filled by multiple side feeds to ensure filling uniformity and add an extended structure to the tail end of the molding cavity to enhance structural strength of the tail of the product.
The uniformity of the product meat thickness is achieved, the occurrence of adverse phenomena such as shrinkage, cold material, cracking, etc. is avoided, and the smoothness of molding in thin-walled areas is improved, and the product yield rate is improved.
Smart Images
Figure CN119609090A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mold processing, in particular to an ultra-thin die-casting molding mold which can make the thickness of the product uniform and free of shrinkage and cracking. Background Art
[0002] The development of new electronic technology has made the quality and assembly requirements of electronic products higher and higher, and the product structure is becoming more and more complex. Take notebook products as an example, customers' overall requirements for products are light, thin and small, and accordingly the thickness of the notebook shell is required to be made thinner and thinner.
[0003] The thickness of the existing notebook bottom cover is 0.5mm on the large surface, but the thickness of the battery compartment area in the middle is only 0.45mm. The product structure is very weak, and it is easy to produce shrinkage, cold material, cracking and other defects during molding, affecting the yield rate of the notebook bottom cover molding. In addition, because the battery compartment area is close to the edge of the bottom cover, it is often torn during the bottom cover demolding process, which also reduces the yield rate of the notebook bottom cover molding.
[0004] Therefore, it is necessary to provide an ultra-thin die casting molding die that can make the molded product have uniform thickness, without shrinkage, cold material, cracking and other undesirable conditions, and can avoid the thin-walled area from being pulled apart when demolding, so as to solve the above problems. Summary of the invention
[0005] The object of the present invention is to provide an ultra-thin die casting forming mold which can make the thickness of the formed product uniform, avoid undesirable conditions such as shrinkage, cold material, cracking, etc., and can avoid the thin-wall area from being cracked when being ejected from the mold.
[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: to provide an ultra-thin die-casting molding mold, including a molding cavity, a die-casting runner system, an extension structure, and an exhaust channel; wherein the die-casting runner system includes a main runner, a forward runner assembly and a lateral runner assembly, the forward runner assembly connects the main runner and the head end of the molding cavity, and the lateral runner assembly connects the forward runner assembly and at least one side end of the molding cavity; the extension structure is connected between the tail end of the molding cavity and the exhaust channel.
[0007] Preferably, the forward flow channel assembly includes a first forward flow channel assembly and a second forward flow channel assembly that are symmetrically arranged; wherein, the first forward flow channel assembly includes a first main flow channel and a plurality of first branch flow channels that are spaced apart and connected to the first main flow channel, each of the first branch flow channels is staggered with the first main flow channel, the first main flow channel is connected to the main flow channel, and each of the first branch flow channels is staggered with the head end of the molding cavity; the second forward flow channel assembly includes a second main flow channel and a plurality of second branch flow channels that are spaced apart and connected to the second main flow channel, each of the second branch flow channels is staggered with the second main flow channel, the second main flow channel is symmetrically arranged with the first main flow channel, each of the second branch flow channels is symmetrically arranged with each of the first branch flow channels, and each of the second branch flow channels is connected to the head end of the molding cavity. By feeding the material to the head end of the molding cavity through the symmetrically arranged first forward flow channel assembly and the second forward flow channel assembly, the purpose of uniform filling is achieved, so that the thickness of the product is uniform and there is no shrinkage.
[0008] Preferably, the lateral flow channel assembly includes a first lateral flow channel assembly and a second lateral flow channel assembly which are symmetrically arranged; wherein, the first lateral flow channel assembly includes a first lateral main flow channel and a plurality of first lateral branch flow channels which are spaced apart and connected to the first lateral main flow channel, each of the first lateral branch flow channels is staggered with the first lateral main flow channel, the first lateral main flow channel is connected to the forward flow channel assembly and extends to the side of the molding cavity, and each of the first lateral branch flow channels is respectively connected to one side end of the molding cavity; the second lateral flow channel assembly includes a second lateral main flow channel and a plurality of second lateral branch flow channels which are spaced apart and connected to the second lateral main flow channel, each of the second lateral branch flow channels is staggered with the second lateral main flow channel, the second lateral main flow channel is connected to the forward flow channel assembly and extends to the side of the molding cavity, and each of the second lateral branch flow channels is respectively connected to the other side end of the molding cavity. The symmetrically arranged first lateral flow channel assembly and the second lateral flow channel assembly are used to feed materials to both side ends of the forming cavity, so as to achieve uniform filling, make the product thickness uniform, without shrinkage, and avoid the occurrence of undesirable phenomena such as cold material and cracking.
[0009] Preferably, the width of each of the first lateral branch channels is successively increased along the flow direction of the first lateral main channel, and the width of each of the second lateral branch channels is successively increased along the flow direction of the second lateral main channel, so as to ensure the uniformity of feed filling and make the product meat thickness uniform and without shrinkage.
[0010] Preferably, the thickness of each of the first lateral runners gradually decreases along the flow direction, and the width gradually increases along the flow direction; the thickness of each of the second lateral runners gradually decreases along the flow direction, and the width gradually increases along the flow direction. On the one hand, it has the effect of increasing pressure and speed for the die casting melt, and on the other hand, it makes the feed filling more uniform, makes the product thickness uniform, has no shrinkage, and avoids the occurrence of adverse phenomena such as cold material and cracking.
[0011] Preferably, at least a portion of the first lateral runners and at least a portion of the second lateral runners are provided at their ends with notches to increase the pressure and speed of the die-casting molten material.
[0012] Preferably, the cross-sectional areas of the first main channel and the second main channel gradually decrease along the flow direction thereof, so as to increase the pressure and speed of the die-casting molten material.
[0013] Preferably, the thickness of each first branch channel gradually decreases along the flow direction, and the width gradually increases along the flow direction; the thickness of each second branch channel gradually decreases along the flow direction, and the width gradually increases along the flow direction. On the one hand, it has the effect of increasing pressure and speed for the die casting melt, and on the other hand, it makes the feed filling more uniform, makes the product thickness uniform, has no shrinkage, and avoids the occurrence of adverse phenomena such as cold material and cracking.
[0014] Preferably, the width of the first branch channel located at the head end of the flow direction of the first main channel is the largest, and the width of the first branch channel located at the end of the flow direction of the first main channel is the smallest; the width of the second branch channel located at the head end of the flow direction of the second main channel is the largest, and the width of the second branch channel located at the end of the flow direction of the second main channel is the smallest; ensuring that the die-casting molten material flows along the first main channel into each first branch channel and flows along the second main channel into each second branch channel more smoothly, thereby ensuring the uniformity of feed filling.
[0015] Preferably, at least a portion of the first branch channel and at least a portion of the second branch channel are provided with a notch at their ends to increase the pressure and speed of the die-casting molten material.
[0016] Preferably, the extension structure includes a main body in the shape of an elongated strip and two side ears, the two side ears are respectively connected to the two ends of the main body and bent to the same side of the main body, and the side ears and the main body are in an arc transition, the main body is connected between the tail end of the molding cavity and the exhaust channel, and the side ears are connected to the two side ends of the molding cavity. The setting of the extension structure adds a section of reinforcement structure to the tail of the product, thereby strengthening the structural strength of the tail of the product, making the product demolding smoother, and effectively improving the occurrence of undesirable conditions such as tearing of the 0.45mm thin-walled area during demolding.
[0017] Compared with the prior art, the ultra-thin die-casting forming mold of the present invention, firstly, its die-casting runner system is provided with a forward runner assembly and a lateral runner assembly, the forward runner assembly is connected to the main runner and the head end of the forming cavity, and the lateral runner assembly is connected to the forward runner assembly and at least one side end of the forming cavity, therefore, the filling is ensured to be uniform through the multiple side feeding and filling of the forming cavity, so that the thickness of the product is uniform, especially for the 0.45mm thick thin-walled area on the product, not only the thickness is uniform, but also there is no shrinkage, and no undesirable phenomena such as cold material and cracking occur; secondly, an extension structure is added between the tail end of the forming cavity and the exhaust channel, so that the tail of the formed product has a reinforcement structure, and the reinforcement structure is adjacent to the 0.45mm thick thin-walled area on the product, thereby strengthening the structural strength of the tail of the product, making the product demolding smoother, effectively improving the occurrence of undesirable conditions such as the 0.45mm thick thin-walled area being torn when demolding, and improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front structural schematic diagram of the ultra-thin die casting forming mold of the present invention.
[0019] Figure 2 yes Figure 1 Top view of the .
[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium die casting runner system.
[0021] Figure 4 yes Figure 3 Top view of the .
[0022] Figure 5 yes Figure 3 Forward schematic diagram of .
[0023] Figure 6 yes Figure 3 Schematic side view of .
[0024] Figure 7 It is a schematic diagram of the back structure of the ultra-thin die casting forming mold of the present invention.
[0025] Figure 8 yes Figure 7 Top view of the .
[0026] Fig. 9 The present invention is a schematic structural diagram of a notebook bottom cover formed by using the ultra-thin die-casting forming mold of the present invention. DETAILED DESCRIPTION
[0027] The embodiments of the present invention are now described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0028] Combination Figure 1-Figure 9 As shown, the ultra-thin die casting mold 100 provided by the present invention is particularly suitable for die casting of a notebook bottom cover 200 with a large surface thickness of 0.5 mm and a thin wall area 210 with a thickness of 0.45 mm, wherein the thin wall area 210 is preferably a battery compartment area, such as Fig. 9 Of course, the thin-walled area 210 is not limited to the battery compartment area, nor is it limited to forming the notebook bottom cover 200, and it is also feasible to be used to form other ultra-thin die-casting parts. When used to form other ultra-thin die-casting parts, the molding cavity can be designed according to the structure of the product itself.
[0029] Continue to combine Figure 1-Figure 9 As shown, in one embodiment of the present invention, the ultra-thin die casting forming mold 100 includes a die casting runner system 110, a forming cavity 120, an extension structure 130 and an exhaust channel 140. The forming cavity 120 has a head end 120a and a tail end 120b opposite to each other, and the tail end 120b has a protrusion 121 for forming an ultra-thin thin-walled area 210 on the product, and the protrusion 121 corresponds to the shape of the thin-walled area 210. In this embodiment, the protrusion 121 is used to form the battery compartment area of the notebook bottom cover 200, so its shape corresponds to the shape of the battery compartment area of the notebook bottom cover 200. The structure of the exhaust channel 140 is a conventional structure in the art and will not be described in detail.
[0030] In this embodiment, the die casting runner system 110 includes a material cake cavity 111, a main runner 112, forward runner components 113, 114 and lateral runner components 115, 116. The forward runner components 113, 114 are connected to the main runner 112 and the head end 120a of the molding cavity 120, and the lateral runner components 115, 116 are connected to the forward runner components 113, 114 and at least one side end of the molding cavity 120. The extension structure 130 is connected between the tail end 120b of the molding cavity 120 and the exhaust channel 140. When molding the product, the die-casting molten material flows into the forward flow channel components 113, 114 and the lateral flow channel components 115, 116 in sequence along the main flow channel 112, and flows into the molding cavity 120 from the head end 120a and the side end of the molding cavity 120 respectively, and then flows into the extension structure 130 and the exhaust channel 140 from the tail end 120b of the molding cavity 120. The design of adding the lateral flow channel components 115 and 116 in the present application ensures the filling uniformity and makes the product thickness uniform, especially for the 0.45mm thick thin-walled area 210 on the product, which not only has uniform thickness, but also has no shrinkage, and no adverse phenomena such as cold material and cracking occur; and the setting of the extension structure 130 makes the tail end of the molded product have a reinforced structure, which strengthens the structural strength of the tail of the product, makes the product demolding smoother, and effectively improves the occurrence of adverse phenomena such as the 0.45mm thick thin-walled area 210 being pulled apart during demolding, thereby ensuring the die-casting quality of the product.
[0031] In the present invention, the die-casting molten material is preferably magnesium alloy liquid. Of course, in addition to magnesium alloy liquid, the die-casting molten material can also be other metal liquids known in the art that are suitable for die-casting the notebook bottom cover 200.
[0032] More preferably, the cake cavity 111 is a cylindrical cavity for easy processing and manufacturing, but not limited thereto. The main flow channel 112 bends and extends upward from the top of the cake cavity 111 near the side, and the design of the main flow channel 112 is a conventional structure in the art and will not be described in detail.
[0033] Continue to combine Figure 1-Figure 8 As shown, in one embodiment of the present invention, the forward flow channel component includes a first forward flow channel component 113 and a second forward flow channel component 114 that are symmetrically arranged. The first forward flow channel component 113 and the second forward flow channel component 114 are specifically arranged symmetrically along the middle of the molding cavity 120. Figure 2 , Figure 8 As shown. Figure 3-Figure 4 As shown, the first forward flow channel component 113 includes a first main flow channel 1131 and a plurality of first branch flow channels 1132 connected to the first main flow channel 1131. Each first branch flow channel 1132 is connected along the flow direction of the first main flow channel 1131 ( Figure 4-5The first branch channels 1132 are arranged in sequence in the direction indicated by the middle arrow A, and each first branch channel 1132 is staggered with the first main channel 1131. The first main channel 1131 is connected to the main channel 112, and each first branch channel 1132 is respectively connected to one side of the head end 120a of the molding cavity 120.
[0034] Continue to view Figure 3-Figure 4 As shown, the second forward flow channel assembly 114 includes a second main flow channel 1141 and a plurality of second branch flow channels 1142 connected to the second main flow channel 1141. Each second branch flow channel 1142 is connected along the flow direction of the second main flow channel 1141 ( Figure 4-5 The second main flow channel 1141 is symmetrically arranged with the first main flow channel 1131 and connected to the main flow channel 112, that is, the second main flow channel 1141 and the first main flow channel 1131 extend to the left and right sides of the main flow channel 112 respectively and are symmetrical, so the flow directions of the second main flow channel 1141 and the first main flow channel 1131 are opposite. Each second main flow channel 1142 is symmetrically arranged with each first main flow channel 1132, and each second main flow channel 1142 is connected to the other side of the head end 120a of the molding cavity 120.
[0035] Combination Figure 1-Figure 4 As shown, the die casting melt enters the main flow channel 112 from the material cake cavity 111, and then flows from the main flow channel 112 to the first main flow channel 1131 and the second main flow channel 1141 on the left and right sides. Figure 4-5 The liquid is injected into the head end 120a of the molding cavity 120 through the first branch channel 1132 and the second branch channel 1142 in the direction indicated by the middle arrows A and B, thereby achieving the purpose of uniform filling and making the product uniform in thickness and without shrinkage.
[0036] Combination Figure 2 , Figure 4-5 , Figure 8 As shown, in a specific embodiment, the first main flow channel 1131 and the second main flow channel 1141 are arranged symmetrically in a roughly "eight" shape, and the connection between the first main flow channel 1131, the second main flow channel 1141 and the main flow channel 112 is an arc transition. Figure 5 As shown, the cross-sectional areas of the first main channel 1131 and the second main channel 1141 gradually decrease along their flow direction, that is, in the direction away from the main channel 112, the cross-sectional areas of the two gradually decrease, thereby increasing the pressure and speed of the die-casting molten material, ensuring that the die-casting molten material flowing into each first branch channel 1132 and each second branch channel 1142 is more uniform, thereby improving the uniformity of material filling.
[0037] Combination Figure 3-Figure 4As shown, in one embodiment of the present invention, the thickness of each first branch channel 1132 gradually decreases along its flow direction, and the width gradually increases along its flow direction. Correspondingly, the thickness of each second branch channel 1142 also gradually decreases along its flow direction, and the width also gradually increases along its flow direction. This structural setting, on the one hand, has the effect of increasing pressure and speed for die casting melt, and on the other hand, makes the feed filling more uniform, makes the product thickness uniform, has no shrinkage, and avoids the occurrence of undesirable phenomena such as cold material and cracking.
[0038] Continue to combine Figure 3-Figure 4 As shown in FIG. 1 , in a specific embodiment, the first forward flow channel assembly 113 includes five first branch flow channels 1132. The first branch flow channel 1132 located at the head end of the flow direction of the first main flow channel 1131 has the largest width, and the first branch flow channel 1132 located at the end of the flow direction of the first main flow channel 1131 has the smallest width. In other words, the first branch flow channel 1132 close to the main flow channel 112 has the largest width, and the first branch flow channel 1132 farthest from the main flow channel 112 has the smallest width. Figure 4 In addition, the width of the middle first branch channel 1132 is greater than the width of the first branch channels 1132 on both sides thereof, that is, the widths of the five first branch channels 1132 in this embodiment are not arranged in descending order, but are arranged irregularly. This structural arrangement can ensure that the die-casting molten material flows along the first main channel 1131 and enters each first branch channel 1132 more smoothly, avoiding uneven flow of the material, thereby ensuring uniformity of the feed filling.
[0039] Continue to combine Figure 3-Figure 4 As shown, correspondingly, the second forward flow channel assembly 114 also includes five second branch flow channels 1142. The second branch flow channel 1142 located at the head end of the flow direction of the second main flow channel 1141 has the largest width, and the second branch flow channel 1142 located at the end of the flow direction of the second main flow channel 1141 has the smallest width. In other words, the second branch flow channel 1142 close to the main flow channel 112 has the largest width, and the second branch flow channel 1142 farthest from the main flow channel 112 has the smallest width, as shown in FIG. Figure 4 In addition, the width of the middle second branch channel 1142 is greater than the width of the second branch channels 1142 on both sides thereof. In this embodiment, the widths of the five second branch channels 1142 are not arranged in descending order, but are arranged irregularly. This makes it easier for the die-casting molten material to flow along the second main channel 1141 into each second branch channel 1142, avoiding uneven flow and thus ensuring uniformity of feeding and filling.
[0040] In one embodiment, at least a portion of the first branch channel 1132 and at least a portion of the second branch channel 1142 are provided with a notch at their ends to increase the pressure and speed of the die casting melt. Figure 3-Figure 4 As shown, in a specific embodiment, the first branch channel 1132 located at the head end of the flow direction of the first main channel 1131 and the ends of the two first branch channels 1132 located at the ends of the flow direction of the first main channel 1131 are provided with a notch 1133. The ends of the five second branch channels 1142 are all provided with a notch 1143. As for the shape and number of the notches, there is no specific limitation, and they can be flexibly set according to the requirements of the product to be formed.
[0041] Next, continue to combine Figure 1-Figure 4 As shown, in one embodiment of the present invention, the lateral flow channel assembly includes a first lateral flow channel assembly 115 and a second lateral flow channel assembly 116 that are symmetrically arranged. The first lateral flow channel assembly 115 and the second lateral flow channel assembly 116 are specifically arranged symmetrically along the middle of the molding cavity 120, as shown in FIG. Figure 4 The first lateral flow channel assembly 115 includes a first lateral main flow channel 1151 and a plurality of first lateral branch flow channels 1152 connected to the first lateral main flow channel 1151. Each first lateral branch flow channel 1152 is arranged along the flow direction of the first lateral main flow channel 1151 ( Figure 4 The first lateral main flow channel 1151 is connected to the first main flow channel 1131 and extends to the side of the molding cavity 120. Moreover, the connection position between the first lateral main flow channel 1151 and the first main flow channel 1131 is in an arc-shaped transition, so that the die-casting molten material flows from the first main flow channel 1131 to the first lateral main flow channel 1151 more smoothly, avoiding the defect of unsmooth material flow; and each first lateral main flow channel 1152 is respectively connected to one side end of the molding cavity 120, and the die-casting molten material flows into the side end of the molding cavity 120 through each first lateral main flow channel 1152, realizing the left side feeding of the molding cavity 120.
[0042] Continue to combine Figure 1-Figure 4 As shown, correspondingly, the second lateral flow channel assembly 116 includes a second lateral main flow channel 1161 and a plurality of second lateral branch flow channels 1162 connected to the second lateral main flow channel 1161, each second lateral branch flow channel 1162 along the flow direction of the second lateral main flow channel 1161 ( Figure 4The second lateral branch channels 1162 are arranged in sequence and spaced apart from each other (in the direction indicated by the middle arrow C), and each second lateral branch channel 1162 is designed to be staggered with the second lateral main channel 1161; the second lateral main channel 1161 is connected to the second main channel 1141 and extends to the side of the molding cavity 120, and the connection position between the second lateral main channel 1161 and the second main channel 1141 is an arc-shaped transition, so that the die-casting molten material can flow from the second main channel 1141 to the second lateral main channel 1161 more smoothly, avoiding the defect of unsmooth material flow; and each second lateral branch channel 1162 is respectively connected to one side end of the molding cavity 120, and the die-casting molten material flows into the side end of the molding cavity 120 through each second lateral branch channel 1162, thereby realizing the right side feeding of the molding cavity 120.
[0043] In the present application, the first lateral flow channel component 115 and the second lateral flow channel component 116 which are symmetrically arranged are used to feed materials to the two side ends of the forming cavity 120 respectively, so as to achieve the purpose of uniform filling, make the product thickness uniform, without shrinkage, and avoid the occurrence of adverse phenomena such as cold material and cracking.
[0044] Continue to combine Figure 1-Figure 4 As shown, in one embodiment of the present invention, the first lateral flow channel assembly 115 includes three first lateral branch flow channels 1152, and the width of each first lateral branch flow channel 1152 is along the flow direction of the first lateral main flow channel 1151 ( Figure 4 The second lateral flow channel assembly 116 also includes three second lateral branch flow channels 1162, and the width of each second lateral branch flow channel 1162 is along the flow direction of the second lateral main flow channel 1161 ( Figure 4 The directions shown by the middle arrow C) are arranged in increasing order, so as to ensure the uniformity of the feeding and filling on the right side of the molding cavity 120, so that the thickness of the product is uniform and there is no shrinkage.
[0045] See also Figure 3 As shown, in this embodiment, the thickness of each first lateral flow channel 1152 gradually decreases along its flow direction, and the width gradually increases along its flow direction. Correspondingly, the thickness of each second lateral flow channel 1162 gradually decreases along its flow direction, and the width gradually increases along its flow direction. This structural setting, on the one hand, has the effect of increasing pressure and speeding up the die casting melt, and on the other hand, makes the feed filling more uniform, makes the product thickness uniform, has no shrinkage, and avoids the occurrence of undesirable phenomena such as cold material and cracking.
[0046] Combination Figure 3-Figure 4As shown, in this embodiment, at least part of the first lateral runners 1152 and at least the second lateral runners 1162 are provided with notches at their ends to increase the pressure and speed of the die casting melt. In a specific embodiment, the first and third first lateral runners 1152 are provided with notches 1153 at their ends. Only the last second lateral runner 1162 is provided with a notch 1163. As for the shape and number of the notches, there is no specific limitation and they can be flexibly set according to the requirements of the product to be formed.
[0047] Combine the following Figure 1-2 , Figure 7-8 As shown, in one embodiment of the present invention, the extension structure 130 includes a main body 131 in the shape of an elongated strip and two side ears 132, the two side ears 132 are respectively connected to the two ends of the main body 131 and bent to the same side of the main body 131, and there is an arc transition between the side ears 132 and the main body 131. Among them, the main body 131 is connected to the tail end 120b of the molding cavity 120 through a spaced connecting piece 133, and the two side ears 132 are connected to the two side ends of the molding cavity 120 through a spaced connecting piece 133. The exhaust channel 140 is connected to the main body 131 and the two side ears 132. The extension structure 130 added in the present application adds a reinforcement structure to the tail of the molded product, thereby strengthening the structural strength of the tail of the product, making the product demolding smoother, and effectively improving the occurrence of undesirable conditions such as tearing of the thin-walled area during demolding.
[0048] Specifically, when the ultra-thin die casting molding die 100 in the present application is used to mold the notebook bottom cover 200, a reinforcing structure is formed at the tail end of the notebook bottom cover 200. The reinforcing structure is adjacent to the thin-walled area 210, that is, adjacent to the battery compartment area with a thickness of only 0.45 mm, thereby strengthening the structural strength of the tail of the notebook bottom cover 200, making the demoulding of the notebook bottom cover 200 smoother, and effectively improving the occurrence of undesirable conditions such as the thin-walled area 210 (battery compartment area) with a thickness of only 0.45 mm on the notebook bottom cover 200 being pulled apart during demoulding, thereby ensuring the molding quality of the notebook bottom cover 200 and improving the yield rate. The reinforcing structure is finally removed by punching to obtain Fig. 9 The notebook bottom cover 200 shown in FIG. The method of removing the reinforcement structure is a conventional method in the art.
[0049] In summary, the ultra-thin die casting forming mold 100 of the present invention firstly has a die casting runner system 110 provided with forward runner components 113, 114 and lateral runner components 115, 116, the forward runner components 113, 114 are connected to the main runner 112 and the head end 120a of the molding cavity 120, and the lateral runner components 115, 116 are connected to the forward runner components 113, 114 and at least one side end of the molding cavity 120, therefore, the filling is ensured to be uniform through the multiple side feeding and filling of the molding cavity 120, so that the product meat thickness is uniform, especially for the upper surface of the product. The 0.45mm thick thin-walled area 210 is not only of uniform thickness, but also free from shrinkage, cold material, cracking and other undesirable phenomena; secondly, an extension structure 130 is added between the tail end 120b of the molding cavity 120 and the exhaust channel 140, so that the tail of the molded product has a reinforcement structure, and the reinforcement structure is adjacent to the 0.45mm thick thin-walled area 210 on the product, thereby strengthening the structural strength of the tail of the product, making the product demolding smoother, effectively improving the occurrence of undesirable phenomena such as the 0.45mm thick thin-walled area 210 being pulled apart during demolding, and improving the product yield rate.
[0050] The structures of other parts of the ultra-thin die casting forming mold 100 involved in the present invention are conventional structures well known to ordinary technicians in the field, and will not be described in detail here.
[0051] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.
Claims
1. An ultra-thin die casting forming mold, comprising a forming cavity and an exhaust passage connected to the forming cavity, characterized in that: Also includes: A die-casting runner system, comprising a main runner, a forward runner assembly and a lateral runner assembly, wherein the forward runner assembly is connected to the main runner and the head end of the molding cavity, and the lateral runner assembly is connected to the forward runner assembly and at least one side end of the molding cavity; An extension structure is connected between the rear end of the molding cavity and the exhaust channel.
2. The ultra-thin die casting forming mold according to claim 1, characterized in that: The forward flow channel component comprises a first forward flow channel component and a second forward flow channel component which are symmetrically arranged; The first forward flow channel assembly includes a first main flow channel and a plurality of first branch flow channels connected to the first main flow channel at intervals, each of the first branch flow channels is staggered with the first main flow channel, the first main flow channel is connected to the main flow channel, and each of the first branch flow channels is connected to the head end of the molding cavity; The second forward flow channel component includes a second main flow channel and a plurality of second branch flow channels connected to the second main flow channel at intervals, each of the second branch flow channels is designed to be staggered with the second main flow channel, the second main flow channel is symmetrically arranged with the first main flow channel, each of the second branch flow channels is symmetrically arranged with each of the first branch flow channels, and each of the second branch flow channels is respectively connected to the head end of the molding cavity.
3. The ultra-thin die casting forming mold according to claim 1, characterized in that: The lateral flow channel assembly comprises a first lateral flow channel assembly and a second lateral flow channel assembly which are symmetrically arranged; Wherein, the first lateral flow channel assembly includes a first lateral main flow channel and a plurality of first lateral branch flow channels spacedly connected to the first lateral main flow channel, each of the first lateral branch flow channels is staggered with the first lateral main flow channel, the first lateral main flow channel is connected to the forward flow channel assembly and extends to the side of the molding cavity, and each of the first lateral branch flow channels is respectively connected to one side end of the molding cavity; The second lateral flow channel assembly includes a second lateral main flow channel and a plurality of second lateral branch flow channels spaced apart from each other and connected to the second lateral main flow channel, each of the second lateral branch flow channels is staggered with the second lateral main flow channel, the second lateral main flow channel is connected to the forward flow channel assembly and extends to the side of the molding cavity, and each of the second lateral branch flow channels is respectively connected to the other side end of the molding cavity.
4. The ultra-thin die casting forming mold according to claim 3, characterized in that: The width of each of the first lateral branch channels is successively increased along the flow direction of the first lateral main channel, and the width of each of the second lateral branch channels is successively increased along the flow direction of the second lateral main channel.
5. The ultra-thin die casting forming mold according to claim 3, characterized in that: The thickness of each of the first lateral flow channels gradually decreases along the flow direction, and the width gradually increases along the flow direction; the thickness of each of the second lateral flow channels gradually decreases along the flow direction, and the width gradually increases along the flow direction.
6. The ultra-thin die casting forming mold according to claim 3, characterized in that: At least a portion of the first lateral flow channel and at least a portion of the second lateral flow channel have notches at their ends.
7. The ultra-thin die casting forming mold according to claim 2, characterized in that: The cross-sectional areas of the first main flow channel and the second main flow channel gradually decrease along the flow direction thereof.
8. The ultra-thin die casting forming mold according to claim 2, characterized in that: The thickness of each of the first branch channels gradually decreases along the flow direction, and the width gradually increases along the flow direction; the thickness of each of the second branch channels gradually decreases along the flow direction, and the width gradually increases along the flow direction.
9. The ultra-thin die casting forming mold according to claim 2, characterized in that: The width of the first branch channel located at the head end of the flow direction of the first main channel is the largest, and the width of the first branch channel located at the end of the flow direction of the first main channel is the smallest; the width of the second branch channel located at the head end of the flow direction of the second main channel is the largest, and the width of the second branch channel located at the end of the flow direction of the second main channel is the smallest; and at least part of the first branch channel and at least part of the second branch channel are provided with notches at their ends.
10. The ultra-thin die casting forming mold according to claim 1, characterized in that: The extension structure includes a main body in the shape of an elongated strip and two side ears, wherein the two side ears are respectively connected to the two ends of the main body and bent to the same side of the main body, and an arc-shaped transition is formed between the side ears and the main body. The main body is connected between the tail end of the molding cavity and the exhaust channel, and the side ears are connected to the two side ends of the molding cavity.