Injection molding structure convenient for post-treatment after encapsulation of aluminum insert

Abstract

The utility model provides an injection molding structure convenient for post-treatment after encapsulation of an aluminum insert, and belongs to the technical field of injection molding of encapsulation parts. According to the utility model, the upper die and the lower die are respectively provided with the first die cavity and the second die cavity, one of the first die cavity and the second die cavity is selected to be communicated with the runner to form the pouring gate, and in addition, the edge of the cavity opening of the first die cavity of the upper die or the edge of the cavity opening of the second die cavity of the lower die is provided with the chamfer to form the die chamfer surface lapped with the pouring gate; the two sides of the pouring gate are both located in the range of the mold chamfering face, so that the pouring gate is obliquely connected to the mold chamfering face, a larger flow cross section can be provided at the same height, flow is ensured, smoothness is maintained, in addition, when the pouring gate is fractured subsequently, the pouring gate can be fractured along the product chamfering face, residues are reduced, and the production efficiency is improved. Even if residues exist, the residues can be located in the range of the chamfered face of the product, the problem that the residues are higher than the large surface of the product and affect installation and use of the product is solved, the workload of aftertreatment is reduced, and aftertreatment operation of the product is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to rubber -coated part injection technology field, concretely relates to a kind of injection molding structure of aluminum insert rubber -coated post-processing convenience. BACKGROUND

[0002] The processing mode of rubber -coated part is usually rubber -coated outside base body injection molding, to form the rubber -coated part of base body and rubber -coated integration. At present, the existing rubber -coated part on market is complicated, such as the positive and negative electrode rubber -coated part of power battery of new energy automobile, the base body is aluminum block insert, at this time, aluminum block is flat block structure, and rubber layer is covered on side surface and one of the large end surface connected with side surface, so that rubber layer can completely wrap the outer side of aluminum block and expose the middle part of aluminum block. Therefore, the injection molding processing thereof is usually to place aluminum block accurately in a mold cavity, and then form a cavity outside aluminum block by clamping, which provides injection molding space for rubber layer.

[0003] At present, the existing injection molding structure for the above-mentioned positive and negative electrode rubber -coated part includes an upper die and a lower die, the lower die is provided with a first mold cavity, the aluminum block is placed in the first mold cavity, and the upper die is provided with a second mold cavity corresponding to the first mold cavity. When the mold is clamped, the first mold cavity and the second mold cavity form a cavity for injection molding. At the same time, a flow channel is formed on the upper die or the lower die, which communicates with the first mold cavity or the second mold cavity. The rubber is injected into the cavity through the flow channel, so as to form a rubber layer on the outer side of the aluminum block. Although the above-mentioned injection molding structure can meet the injection molding requirements of the positive and negative electrode rubber -coated part, one side of the flow channel is usually flush with the surface of the upper die or the lower die, and the other side is recessed towards the upper die or the lower die. In addition, the gate of one end of the flow channel is directly lapped on the edge of the first mold cavity or the second mold cavity in a 90-degree state. In order to ensure the flow rate of the gate and the smoothness of injection molding, the diameter of the gate is relatively large, which causes the residue in the gate and the flow channel to be higher than the large surface of the product, which has a significant impact on the installation and use of the product in the later stage. The high part needs to be cleaned, which increases the processing amount of post-processing and is not convenient for post-processing operation of the product. SUMMARY

[0004] In view of the above problems existing in the prior art, the present application provides an injection molding structure for aluminum insert rubber -coated post-processing, which is provided with a chamfer on the edge of the upper die or the lower die with a flow channel, and the gate of the flow channel is lapped in an inclined state in the range covered by the chamfer. Under the same vertical height, the inclination of the gate can ensure the flow rate of the gate and the smoothness of injection molding. In addition, when the gate is broken, it can be broken along the chamfer of the formed product, reducing residue and ensuring that the residue height is lower than the large surface of the product, reducing the processing amount of post-processing and facilitating the post-processing operation of the product.

[0005] The specific technical solutions are as follows:

[0006] The injection molding structure for facilitating post-processing of aluminum insert encapsulation comprises an upper mold and a lower mold, a first mold cavity and a second mold cavity are respectively arranged on the opposite sides of the upper mold and the lower mold, and when the upper mold and the lower mold are closed, the first mold cavity and the second mold cavity form a mold cavity, and a flow channel is arranged on the upper mold or the lower mold and communicates with the first mold cavity or the second mold cavity, and the interface between the flow channel and the corresponding first mold cavity or second mold cavity forms a gate, and the gate of the flow channel is arranged on the mold chamfer surface, and the gate of the flow channel is located in the mold chamfer surface.

[0007] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the end of the flow channel forming the gate is arranged in an inclined manner, and the inclined direction is away from the gate and forms an acute angle with the mold chamfer surface.

[0008] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the outer side of the mold chamfer surface is flush with the end surface of the upper mold or the lower mold.

[0009] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the injection molding structure further comprises a trace-free ejection assembly, the trace-free ejection assembly comprises a top block, a top rod and a top plate, the top plate is arranged on the side opposite to the upper mold or the lower mold, a sliding cavity is arranged on the upper mold and communicates with the first mold cavity or the lower mold and communicates with the second mold cavity, and a sliding hole is arranged on the bottom of the sliding cavity, the top block is slidingly arranged in the sliding cavity, the top rod is slidingly arranged in the sliding hole, and the two ends of the top rod are respectively connected with the top block and the top plate.

[0010] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the projection of the top block in the first mold cavity or the second mold cavity is located within the projection range of the aluminum insert in the corresponding first mold cavity or the second mold cavity.

[0011] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the end face shape of the end of the top block away from the top rod is consistent with the shape of the most protruding surface of the area of the aluminum insert exposed outside the encapsulation.

[0012] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein a clearance hole is arranged in the middle of the top block and penetrates both ends in the axial direction of the top rod, a positioning insert is arranged in the clearance hole, one end of the positioning insert is fixed on the corresponding upper mold or lower mold, and the other end of the positioning insert extends into the corresponding first mold cavity or second mold cavity after penetrating through the top block.

[0013] The injection molding structure for facilitating post-processing of aluminum insert encapsulation, wherein the top rod is a threaded screw, the threaded end of the top rod is threadedly connected with the top block, a threaded hole is arranged on the top plate, and the nut end of the top rod is embedded in the threaded hole.

[0014] The injection molding structure for facilitating post-processing of aluminum insert encapsulation has the following advantages:

[0015] The injection molding structure for facilitating post-processing of aluminum insert encapsulation has the following advantages:

[0016] The injection molding structure for facilitating post-processing of aluminum insert encapsulation has the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural diagram of an embodiment of the injection molding structure for facilitating post-processing of aluminum insert encapsulation of the present application;

[0018] Figure 2 FIG. 2 is a structural diagram of an embodiment of the injection molding structure for facilitating post-processing of aluminum insert encapsulation of the present application;

[0019] Figure 3 FIG. 3 is a structural diagram of an embodiment of the injection molding structure for facilitating post-processing of aluminum insert encapsulation of the present application; Figure 1 FIG. 4 is an enlarged view of part A in FIG. 3.

[0020] In the drawings: 1, upper mold; 11, first mold cavity; 12, flow channel; 13, gate; 14, mold chamfer surface; 2, lower mold; 21, second mold cavity; 22, sliding cavity; 3, mark-preventing ejection assembly; 31, top block; 32, ejector rod; 311, avoiding hole; 4, positioning insert; 5, aluminum insert; 6, encapsulation layer. DETAILED DESCRIPTION

[0021] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the following embodiments are combined with the attached drawings Figure 1 to the attached Figure 3 The technical solutions of the utility model are described in detail, but the following contents are not limitations of the utility model.

[0022] Figure 1 The structure diagram of an embodiment of the injection molding structure for facilitating post-processing of the aluminum insert after encapsulation of the utility model; Figure 2 The structure diagram of the embodiment of the utility model with the die chamfer surface is shown in Figure Figure 1 and Figure 2 The injection molding structure for facilitating post-processing of the aluminum insert provided by the embodiment includes an upper die 1 and a lower die 2, at this time, the opposite sides of the upper die 1 and the lower die 2 are respectively provided with a first die cavity 11 and a second die cavity 21, and when the upper die 1 and the lower die 2 are closed, the first die cavity 11 and the second die cavity 21 form a mold cavity, and the aluminum insert 5 to be injected is placed in the mold cavity. At the same time, the upper die 1 or the lower die 2 is also provided with a flow channel 12 communicating with the first die cavity 11 or the second die cavity 21, and the flow channel 12 and the interface of the corresponding first die cavity 11 or second die cavity 21 form a gate 13, and the liquid encapsulation enters the mold cavity through the gate 13 from the flow channel 12, so as to form an encapsulation layer 6 outside the aluminum insert 5 in the mold cavity, and obtain the product after the aluminum insert 5 is encapsulated.

[0023] Figure 3 The enlarged view of part A in Figure 1 Figure Figures 1 to 3As shown, the mouth edge of the cavity of the first mold cavity 11 of the upper mold 1 or the mouth edge of the cavity of the second mold cavity 21 of the lower mold 2 where the flow channel 12 is located is arranged as a chamfer to form a mold chamfer surface 14, preferably, the mouth edge of the cavity of the first mold cavity 11 of the upper mold 1 is provided with the mold chamfer surface 14, and the gate 13 of the flow channel 12 is overlapped on the mold chamfer surface 14, so that when injection molding, the position where the encapsulation flows into the cavity is located at the upper part of the cavity, facilitating the flow of encapsulation into the cavity and filling the cavity, and also enabling the edge of the formed encapsulation to be chamfered directly to form a product chamfer surface, without the need for subsequent chamfering operation, reducing the post-processing steps. In addition, both sides of the gate 13 of the flow channel 12 are located in the mold chamfer surface 14, so that the residue at the gate 13 is always within the range of the formed product chamfer surface, that is, when the gate 13 is broken, the encapsulation at the gate 13 will break along the product chamfer surface, so that the residue is small or non-existent, and even if there is residue, it can be below the large surface of the product, avoiding interference with the installation and use of the product later, thereby reducing the processing amount during post-processing of the product, facilitating the post-processing operation of the product. In addition, through the overlapping of the mold chamfer surface 14 and the gate 13, the flow area at the gate 13 can be increased within the same height range, ensuring the flow and smoothness during injection molding, facilitating injection molding processing and improving product quality.

[0024] Specifically, the end of the flow channel 12 forming the gate 13 is arranged as an inclination, so that the flow cross section of the end of the flow channel 12 forming the gate 13 gradually decreases, providing conditions for subsequent aggregation at the gate 13 and limiting the two sides of the gate 13 within the mold chamfer surface 14. In addition, the inclination direction of the end of the flow channel 12 forming the gate 13 is set to be away from the direction of the gate 13, and the inclination direction of the end of the flow channel 12 forming the gate 13 forms an acute angle with the mold chamfer surface 14, so that the end of the flow channel 12 forming the gate 13 can be inclined away from the side of the first mold cavity 11, thereby increasing the distance between the product, providing more operation space for the subsequent breaking of the gate 13, and further facilitating the breaking of the gate 13.

[0025] More specifically, the outer side of the mold chamfer surface 14 is flush with the end surface of the upper mold 1 or the lower mold 2, preferably, when the mold chamfer surface 14 is provided on the upper mold 1, the outer side of the mold chamfer surface 14 is flush with the end surface of the bottom of the upper mold 1, so that the starting position of the product chamfer surface of the product obtained after injection molding is at the parting line of the upper mold 1 and the lower mold 2, facilitating the demolding of the product, preventing the problem that the product is interfered by the mold structure and affects the demolding of the product, and the structure design is more reasonable.

[0026] More specifically, the mold structure further comprises a trace-proof ejection assembly 3, at this time, the trace-proof ejection assembly 3 further comprises a top block 31, a top rod 32 and a top plate. When installed, the top plate is arranged on the side of the upper mold 1 or the lower mold 2 away from each other, preferably, the top plate is arranged on the side of the lower mold 2 away from the upper mold 1, which provides conditions for the subsequent direct contact with the aluminum insert 5 and the product is lifted. In addition, a sliding cavity 22 is also provided on the upper mold 1 and is connected with the first mold cavity 11 or the lower mold 2 and is connected with the second mold cavity 21, preferably, when the top plate is arranged on the side of the lower mold 2 away from the upper mold 1, the sliding cavity 22 is arranged on the lower mold 2 and is connected with the second mold cavity 21, and the arrangement direction of the sliding cavity 22 is the direction of the lower mold 2 towards the upper mold 1, which is convenient for the product to be lifted out of the second mold cavity 21 of the lower mold 2. At the same time, a sliding hole is also provided on the cavity bottom of the sliding cavity 22, the arrangement direction of the sliding hole is consistent with the arrangement direction of the sliding cavity 22, and the top block 31 is slidingly arranged in the sliding cavity 22, and the top rod 32 is slidingly arranged in the sliding hole, so that the sliding direction of the top rod 32 and the top block 31 is consistent, which provides conditions for the subsequent top rod 32 to push the top block 31 to slide in the sliding cavity 22. In addition, the two ends of the top rod 32 are connected with the top block 31 and the top plate respectively, that is, the top plate can be pushed by the extension driver later, the top rod 32 is moved by the top plate, so that the top rod 32 can push the top block 31 to move in the sliding cavity 22, the product is lifted out of the second mold cavity 21, and the product is conveniently discharged.

[0027] More specifically, the projection profile of the top block 31 in the first mold cavity 11 or the second mold cavity 21 is located in the projection range of the aluminum insert 5 in the corresponding first mold cavity 11 or the second mold cavity 21, that is, when the top block 31 is arranged in the corresponding sliding hole of the second mold cavity 21, the projection profile of the top block 31 in the second mold cavity 21 is located in the projection range of the aluminum insert 5 in the second mold cavity 21, so that the top block 31 will not contact the encapsulation layer 6, thereby avoiding the influence of the top block 31 on the injection encapsulation cavity, avoiding the problem of uneven surface of the encapsulation layer 6 caused by assembly gap and other factors, improving the product quality, further reducing the processing amount of post-processing, and facilitating the post-processing operation of the product.

[0028] More specifically, the end face shape of the end of the top block 31 away from the top rod 32 is consistent with the shape of the most protruding surface of the aluminum insert 5 exposed in the encapsulation, so that when the product is lifted out of the second mold cavity 21 by the top block 31, the end face of the top block 31 can be in overall contact with the most protruding surface of the aluminum insert 5, so that the most protruding surface of the aluminum insert 5 is subjected to force as a whole, which can ensure that the product is lifted out smoothly and reliably, and can also avoid causing lifting marks on the most protruding surface of the aluminum insert 5, solving the problem of causing indentation on the surface of the aluminum insert 5 by directly lifting it by the top rod 32 in the prior art, and further ensuring the product quality.

[0029] More specifically, a relief hole 311 is further formed in the middle of the top block 31 and extends through both ends along the axial direction of the top rod 32, that is, the relief hole 311 can extend through the top block 31 along the sliding direction of the top block 31, so that the relief hole 311 moves in the same direction as the top block 31 when the top block 31 slides. In addition, a positioning insert 4 is arranged in the relief hole 311, at this time, one end of the positioning insert 4 is fixed to the corresponding upper die 1 or lower die 2, preferably, when the top block 31 is arranged in the lower die 2, the positioning insert 4 is fixed to the lower die 2 at the same time, so that the positioning insert 4 can be fixed relative to the top block 31, at this time, one end of the positioning insert 4 extends into the corresponding first mold cavity 11 or second mold cavity 21 after passing through the top block 31. In the case that the positioning insert 4 is fixed to the lower die 2, the positioning insert 4 extends into the second mold cavity 21. When the aluminum insert 5 is placed in the mold cavity for injection molding, the aluminum insert 5 can be accurately limited to a predetermined position in the mold cavity by the sleeve of the aluminum insert 5 and the positioning insert 4, thereby ensuring the quality of the product obtained by injection molding. In addition, the product is not affected by the positioning insert 4 when it is ejected by the top block 31, and the structure design is more reasonable.

[0030] More specifically, the top rod 32 used to connect the top block 31 and the top plate is preferably a plug screw, so that it has a part with a relatively smooth and flat surface, thereby better cooperating with the telescopic hole for telescopic guiding, further improving the stability of the top block 31 when sliding, and also facilitating the connection of the threaded end with the top block 31, and the disassembly is more convenient. When assembling, the threaded end of the top rod 32 is threadedly connected with the top block 31, and a recess hole is formed in the top plate, and the nut end of the top rod 32 is embedded in the recess hole, thereby realizing the connection of both ends of the top rod 32 with the top block 31 and the top plate.

[0031] More specifically, a plurality of first mold cavities 11 are further formed in the upper die 1, and a plurality of second mold cavities 21 corresponding to the first mold cavities 11 are further formed in the lower die 2, so as to ensure that multiple products can be injection molded at the same time. In addition, an injection channel is further formed in the upper die 1 or the lower die 2, preferably, the injection channel is arranged on the lower die 2, so that the injection channel and the flow channel 12 can be arranged on the lower die 2 and the upper die 1 respectively, which can facilitate the processing of the injection channel and the flow channel 12, and also reduce the excessive processing of one of the upper die 1 or the lower die 2, thereby ensuring the structural strength. In addition, the injection channel is in communication with each flow channel 12, so that the injection channel can inject liquid encapsulant into each mold cavity formed by the first mold cavity 11 and the corresponding second mold cavity 21 through the flow channel 12, thereby ensuring the simultaneous injection molding of multiple products and improving the processing efficiency.

[0032] The injection molding structure for facilitating post-processing of the glued aluminum insert provided by the embodiment comprises an upper mold 1 and a lower mold 2; a first mold cavity 11 and a second mold cavity 21 are arranged on the upper mold 1 and the lower mold 2 respectively, a flow channel 12 is arranged on the upper mold 1 or the lower mold 2 and is communicated with the corresponding first mold cavity 11 or the second mold cavity 21, and a gate 13 is formed at the communication position of the flow channel 12, in addition, the mouth edge of the cavity opening of the first mold cavity 11 of the upper mold 1 or the mouth edge of the cavity opening of the second mold cavity 21 of the lower mold 2 is provided with a chamfer to form a mold chamfer surface 14, and the gate 13 is overlapped on the formed mold chamfer surface 14, and the two sides of the gate 13 are both located in the range of the mold chamfer surface 14, so that the gate 13 is inclinedly connected on the mold chamfer surface 14, so that a larger flow cross section can be provided at the same height, the flow of the gate 13 can be ensured at a smaller height, the flow is maintained unobstructed, in addition, when the gate 13 is broken subsequently, the gate 13 can be broken along the product chamfer surface, the residue is reduced, even if there is residue, the residue can be located in the range of the product chamfer surface, the problem that the residue is higher than the large surface of the product and affects the installation and use of the product is avoided, the workload of the post-processing is reduced, and the post-processing operation of the product is facilitated.

[0033] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model, and those skilled in the art should realize that the obtained solutions of equivalent replacement and obvious changes by applying the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. An injection molding structure facilitating post-coating processing of aluminum inserts, comprising an upper mold and a lower mold, wherein a first mold cavity and a second mold cavity are respectively formed on opposite sides of the upper mold and the lower mold, and when the upper mold and the lower mold are closed, the first mold cavity and the second mold cavity form a mold cavity, and a runner is formed on the upper mold or the lower mold communicating with the first mold cavity or the second mold cavity, wherein the connection between the runner and the interface of the corresponding first mold cavity or the second mold cavity forms a gate, characterized in that, The opening edge of the first cavity of the upper mold or the opening edge of the second cavity of the lower mold where the runner is located is chamfered to form a chamfered surface of the mold. The gate of the runner overlaps on the chamfered surface of the mold, and both sides of the gate of the runner are located within the chamfered surface of the mold.

2. The injection molding structure according to claim 1, which facilitates post-coating processing of aluminum inserts, is characterized in that... The runner is arranged at an angle at one end forming the gate, and the angle is away from the gate and forms an acute angle with the chamfered surface of the mold.

3. The injection molding structure according to claim 1, which facilitates post-coating processing of aluminum inserts, is characterized in that... The outer edge of the chamfered surface of the mold is flush with the end face of the upper mold or the lower mold.

4. The injection molding structure according to claim 1, which facilitates post-coating processing of aluminum inserts, is characterized in that... It also includes an anti-mark ejection assembly, which includes a top block, a top rod, and a top plate. The top plate is disposed on the opposite side of the upper mold or the lower mold. The upper mold has a sliding cavity that communicates with the first mold cavity, or the lower mold has a sliding cavity that communicates with the second mold cavity. At the same time, a sliding hole is provided on the bottom of the sliding cavity. The top block is slidably disposed in the sliding cavity, and the top rod is slidably disposed in the sliding hole. The two ends of the top rod are respectively connected to the top block and the top plate.

5. The injection molding structure according to claim 4, which facilitates post-coating processing of aluminum inserts, is characterized in that... The outline of the projection of the top block in the first mold cavity or the second mold cavity is located within the projection range of the aluminum insert in the corresponding first mold cavity or the second mold cavity.

6. The injection molding structure according to claim 5, which facilitates post-treatment of aluminum insert overmolding, is characterized in that, The shape of the end face of the top block away from the top rod is consistent with the shape of the most prominent surface of the aluminum insert exposed outside the coating.

7. The injection molding structure according to claim 4, which facilitates post-coating processing of aluminum inserts, is characterized in that... A clearance hole is provided in the middle of the top block, extending through both ends along the axial direction of the top rod. A positioning insert is provided in the clearance hole. One end of the positioning insert is fixed to the corresponding upper mold or lower mold. After passing through the top block, the other end of the positioning insert extends into the corresponding first mold cavity or second mold cavity.

8. The injection molding structure according to claim 4, which facilitates post-treatment of aluminum insert overmolding, is characterized in that, The push rod is a plug screw, and the threaded end of the push rod is threadedly connected to the top block. The top plate has a recessed hole, and the nut end of the push rod is embedded in the recessed hole.

9. The injection molding structure according to claim 1, which facilitates post-coating processing of aluminum inserts, is characterized in that... The upper mold has a plurality of first mold cavities, and the lower mold has a plurality of second mold cavities that correspond one-to-one with the first mold cavities. The upper mold or the lower mold also has an injection channel, and the injection channel is connected to each of the flow channels.

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