Inverted injection mold

Abstract

The utility model relates to the technical field of molds, and particularly discloses an inverted injection mold. The mold comprises a panel, a stripper plate, a front mold plate, a rear mold plate, a front mold core, a rear mold core and a molding cavity, an ejection structure is arranged between the stripper plate and the front mold plate, a preset distance is arranged between one side of the ejection structure and the front mold plate, and power structures connected with the ejection structure and the rear mold plate correspondingly are arranged on the two sides of the inverted injection mold correspondingly. The ejection structure comprises a first ejection plate arranged on one side of the stripper plate and connected with the power structure, a second ejection plate arranged below the first ejection plate, an inclined ejection assembly used for forming an inverted buckle structure and an ejection rod structure arranged on the second ejection plate. A pouring structure is arranged on the panel and comprises a main runner arranged in the panel, a sub-runner connected with the main runner and a sprue structure connected with the sub-runner and the forming cavity. The inverted structure product of the mold is good in appearance quality, easy to debug and maintain in later production and low in reject ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an inverted injection mold. Background Art

[0002] In the injection molding process, mold design is crucial to product quality and production efficiency, such as Figure 1 The protective cover product shown is made of PC. During the injection molding process of PC material, the design of the glue inlet directly affects the surface quality and production efficiency of the product. Due to the poor fluidity of PC material, the design of the glue inlet becomes more complicated. The surface of the product structure has gray sunburn marks and there must be no glue injection marks. Common glue injection methods include direct glue injection on the surface of the large gate, which will leave obvious glue injection marks on the product, affecting the product's aesthetics and appearance quality; or eccentric glue injection in the large gate mold, transferring the glue inlet to the side or bottom of the product. However, this method increases the size and complexity of the mold, thereby increasing the mold cost and maintenance difficulty; or converting from a fine gate to a large gate. Although this method can reduce the impact of the glue inlet on the product appearance, due to the high viscosity of PC material, the conversion from a fine gate to a large gate will cause significant pressure loss. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an inverted injection mold. The inverted structure of the mold has good product molding appearance quality, is easy to debug and maintain in the later stage of production, and has a low defect rate.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A flip-chip injection mold, comprising:

[0006] A panel, a sprue plate, a front template and a rear template are arranged in sequence from top to bottom, a front mold core is provided on the front template, a rear mold core is provided on the rear template, and a molding cavity is formed between the front mold core and the rear mold core; an ejection structure is provided between the sprue plate and the front template, one side of the ejection structure is spaced a preset distance from the front template, and power structures connected to the ejection structure and the rear template are provided on both sides of the inverted injection mold, the ejection structure includes a first top plate arranged on one side of the sprue plate and connected to the power structure, a second top plate arranged below the first top plate, an inclined ejector assembly for molding an inverted structure and a ejector rod structure arranged on the second top plate; a casting structure is provided on the panel, and the casting structure includes a main channel arranged in the panel, a branch channel connected to the main channel, and a gate structure connected to the branch channel and the molding cavity.

[0007] According to some embodiments of the present invention, two groups of the power structures are provided on one side of the mold.

[0008] According to some embodiments of the present utility model, the power structure includes a pull rod connected to the first top plate and the rear template, the pull rod is provided with a first groove and a second groove for pulling the ejection structure, a first fastener sliding in the first groove is fixed on the first top plate, and a second fastener sliding in the second groove is fixed on the rear template.

[0009] According to some embodiments of the present invention, the length of the second groove is greater than the length of the first groove.

[0010] According to some embodiments of the present invention, when the mold is closed, the first fastener is arranged at the lower end of the first groove, and the second fastener is arranged at the upper end of the second groove.

[0011] According to some embodiments of the present invention, a plurality of nylon plugs are provided between the front template and the rear template.

[0012] According to some embodiments of the present invention, the inclined ejector assembly includes a slider seat fixed on the second ejector plate, an inclined ejector rod slidably connected to the slider seat and inclined toward the inner side of the mold, and a forming portion for forming is provided on one side of the inclined ejector rod.

[0013] According to some embodiments of the present invention, the inclined ejector rod includes an L-shaped structure for positioning, and a positioning groove matching the L-shaped structure is provided in the front mold core.

[0014] According to some embodiments of the present invention, the ejector structure includes a plurality of ejector pins arranged on the second ejector plate.

[0015] According to some embodiments of the present invention, the gate structure includes a gate sleeve arranged on the front mold core, and a casting groove which is narrow at the top and wide at the bottom is provided inside the gate sleeve, and the top width of the casting groove is smaller than the width of the diversion channel connected thereto.

[0016] The utility model has at least the following beneficial effects:

[0017] The mold of the utility model is an inverted mold, the pouring structure and the ejection structure are both on the front mold, and the power structures arranged on both sides of the mold and connected to the ejection structure and the rear mold plate respectively utilize the mold opening force when the mold is opened to pull the ejection structure connected thereto to eject the mold downward, thereby facilitating product demoulding. The arrangement of the pouring structure diversion channel reduces pressure loss and can better shape the product. The mold structure enables the product to be injection molded from the back, with no glue openings on the surface and sides, thereby avoiding leaving molding or ejection marks on the product appearance surface, improving the surface quality of the product, and making it easy to debug and maintain in later production, with a low defect rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the protective cover product of the present utility model;

[0019] Figure 2 This is a side view of the inverted injection mold of the present invention;

[0020] Figure 3 This is a top view of the flip-chip injection mold of the present invention;

[0021] Figure 4 It is along Figure 3 Cross-sectional view of line AA;

[0022] Figure 5 It is along Figure 3 Cross-sectional view of line BB;

[0023] Figure 6 It is along Figure 3 Cross-sectional view of the CC line. DETAILED DESCRIPTION

[0024] The following description of the present invention, with reference to the accompanying drawings, is provided to facilitate a more comprehensive understanding of the various embodiments of the present invention as defined in the claims and their equivalents. The description includes various specific details to assist understanding, but these details should be construed as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present invention.

[0025] In the description of the present invention, descriptions of directions, such as up, down, front, back, left, right, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0026] It will be understood that when one element (e.g., a first element) is “connected” to another element (e.g., a second element), the element may be directly connected to the other element or an intervening element (e.g., a third element) may be present between the element and the other element.

[0027] See also Figure 1 The protective cover product cannot have a glue inlet due to the surface structure of the product. To solve the above problem, the embodiment of the utility model provides a flip-chip injection mold, such as Figure 1-6 As shown, it includes: a panel 101, a nozzle plate 102, a front template 103 and a rear template 104 arranged in sequence from top to bottom, a front mold core 105 is provided on the front template 103, and a rear mold core 106 is provided on the rear template 104, and a molding cavity 107 is formed between the front mold core 105 and the rear mold core 106; an ejection structure 2 is provided between the nozzle plate 102 and the front template 103, and one side of the ejection structure 2 is spaced a preset distance from the front template 103, and power structures 3 connected to the ejection structure 2 and the rear template 104 are provided on both sides of the flip-chip injection mold. The ejection structure 2 includes a first top plate 201 connected to the power structure 3 and arranged on one side of the nozzle plate 102, a second top plate 202 arranged below the first top plate 201, an inclined top assembly 203 for forming an undercut structure, and a ejector rod structure 204 arranged on the second top plate 202; a casting structure 4 is arranged on the panel 101, and the casting structure 4 includes a main channel 401 arranged in the panel 101, a branch channel 402 connected to the main channel 401, and a gate structure 403 connected to the branch channel 402 and the molding cavity 107.

[0028] The mold of the utility model is an inverted mold. The pouring structure 4 and the ejection structure 2 are both on the front mold, so that the product can be injection molded from the back. There are no glue ports on the surface and sides, which can avoid leaving molding or ejection marks on the appearance of the product, and improve the surface quality of the product. Specifically, a panel 101 is provided for fixing the mold and installing the mold on the injection molding machine. A gate plate 102 is provided below the panel 101 for guiding the molten plastic to flow from the injection molding machine nozzle to the main channel 401 of the mold. The setting of the gate plate 102 facilitates the automatic separation of waste materials in the pouring structure 4 from the molded product when the mold is opened, thereby improving production efficiency. A front template 103 and a rear template 104 for molding the product are provided below the gate plate 102, and the first top plate 201 is provided. The second ejector plate 202 is arranged between the nozzle plate 102 and the front template 103, so as to facilitate the subsequent use of the inclined ejector assembly 203 and the ejector rod structure 204 and other structures to eject the product. The inclined ejector assembly 203 is used to form the undercut structure on the inside of the product. When ejecting, the undercut structure is demoulded by oblique movement. The inverted mold allows the ejection structure 2 to be directly pressed against the inner surface of the product, which can more effectively eject the product. The ejector rod structure 204 can be a structure such as an ejector rod or a sleeve to eject the product. Since the first ejector plate 201 and the second ejector plate 202 will move downward to eject the product, the first ejector plate 201 is separated from the front template 103 by a preset distance, which is determined by those skilled in the art according to actual conditions.

[0029] Since the ejection structure 2 requires an ejection force to be pulled downward, and this mold is an inverted mold, a pouring structure 4 is provided on one side of the ejection, and the space is limited, a power structure 3 is provided on both sides of the mold, which is respectively connected to the ejection structure 2 and the rear template 104. The side connected to the rear template 104 uses the mold opening force when opening the mold to pull the ejection structure 2 connected to the other side to eject the mold downward. The power structure 3 can be a power structure 3 such as a buckle machine and a pull rod 301. One or more groups of structures can be set in the center of one side of the mold to provide power for the ejection structure 2; the pouring structure 4 includes a main channel 401, a branch channel 402 and a gate structure 403. These structures are responsible for transporting the plastic melt from the injection molding machine to the molding cavity 107, which helps to reduce the pressure loss of the molten plastic from the main channel 401 to the molding cavity 107. The pouring structure 4 can also be automatically cut off during ejection in conjunction with the gate plate 102, which helps to achieve automatic Streamlined production and improved efficiency; when opening the mold, the front template 103 and the rear template 104 are opened together, and under the limiting action of the plug screws, the nozzle plate 102 is separated from the front template 103, and then the nozzle plate 102 is separated from the panel 101, which is convenient for separating the waste molded in the gate structure 403 from the product, and then the front template 103 and the rear template 104 are separated, leaving space for the ejection structure 2 to eject the molded product, and continue to open the mold for a certain distance. The power structure 3 will be pulled as the rear template 104 moves, and at the same time drive the ejection structure 2 connected thereto, so that the ejection structure 2 drives the inclined ejector assembly 203 and the ejector rod structure 204 to push toward one side of the product to complete the ejection of the product; when closing the mold, the rear template 104 drives the power structure 3 to reset the ejection structure 2. The product molded with the inverted structure of the utility model has good appearance quality, is easy to debug and maintain in later production, and has a low defective rate.

[0030] In some embodiments, as Figure 2 As shown, the power structure 3 is provided with two groups on one side of the mold.

[0031] Specifically, two sets of power structures 3 are provided on one side of the mold, which can eject the product more evenly and smoothly.

[0032] In some embodiments, as Figure 2 As shown, the power structure 3 includes a pull rod 301 connected to the first top plate 201 and the rear template 104. The pull rod 301 is provided with a first groove 302 and a second groove 303 for pulling the ejection structure 2. A first fastener 304 sliding in the first groove 302 is fixed on the first top plate 201, and a second fastener 305 sliding in the second groove 303 is fixed on the rear template 104.

[0033] Specifically, the power structure 3 can simplify the design of the ejection and reset mechanism and reduce the complexity of the mold by setting a groove on the pull rod 301 and cooperating with the fasteners on the first top plate 201 and the front template 103. Specifically, when the rear template 104 moves, it drives the second fastener 305 connected and fixed to it to slide in the second groove 303. When it slides to the lower end, the pull rod 301 will be pulled by the rear template 104, thereby driving the entire pull rod 301 to move, and at the same time, the first fastener 304 in the first groove 302 also slides to The end of the first groove 302 drives the first top plate 201 to move along with the rear template 104, and the ejection structure 2 on the first top plate 201 and the second top plate 202 is also pressed, which facilitates the ejection of the product. When the mold is closed, when the second fastener 305 slides to the upper end of the second groove 303 along with the rear template, the reset rod also resets the ejection assembly. As the reset occurs, the first fastener 304 slides downward in the first groove 302. The setting of the first groove 302 prevents the ejection structure 2 from interfering with the power structure 3.

[0034] Furthermore, if Figure 2 As shown, the length of the second groove 303 is greater than the length of the first groove 302 .

[0035] Specifically, the second fastener 305 slides in the second groove 303. The second groove 303 is designed to prevent the pull rod 301 from being pulled downward when the rear template 104 is initially ejected. The pull rod 301 will only be pulled when it slides to the end. The length of the second groove 303 determines the distance that the rear template 104 does not move the ejection structure 2, so the length is longer. The length of the first groove 302 is set to allow the ejection structure 2 to return to its original position when the mold is closed.

[0036] Furthermore, if Figure 2 As shown, when the mold is closed, the first fastener 304 is arranged at the lower end of the first groove 302, and the second fastener 305 is arranged at the upper end of the second groove 303.

[0037] Specifically, the fasteners are arranged at the ends of the respective grooves, which can ensure the position during mold closing and facilitate the positioning of the subsequent mold closing.

[0038] In some embodiments, as Figure 6 As shown, a plurality of nylon plugs 5 are provided between the front template 103 and the rear template 104 .

[0039] Under the action of the nylon plug 5, the front template 103 and the rear template 104 are moved together by friction, which is convenient for cleaning up the waste material of the feed port structure. When the mold is subsequently opened, the force on the front template 103 and the rear template 104 is greater than the friction, so the front template 103 and the rear template 104 are separated, which is convenient for the product to continue to be demolded.

[0040] In some embodiments, as Figure 4 As shown, the inclined ejector assembly 203 includes a slider seat 205 fixed on the second ejector plate 202, an inclined ejector rod 206 slidably connected to the slider seat 205 and inclined toward the inside of the mold, and a molding portion 207 for molding is provided on one side of the inclined ejector rod 206.

[0041] Specifically, the slider seat 205 is fixed on the second top plate 202 as the support and sliding basis of the inclined push rod 206. As the second top plate 202 moves, the inclined push rod 206 that slides with the slider seat 205 is pressed down and reset. The inclined setting toward the inside of the mold makes it convenient to smoothly detach the undercut structure on the product during the mold opening process, and the molding part 207 is used to mold the undercut structure on the product.

[0042] Furthermore, if Figure 4 As shown, the inclined ejector rod 206 includes an L-shaped structure for positioning, and a positioning groove 209 matching the L-shaped structure is provided in the front mold core 105.

[0043] When the mold is closed, the L-shaped structure will cooperate with the positioning groove 209 to ensure that the inclined ejector 206 is correctly positioned during the mold operation, ensuring that when the mold is closed, the material can be correctly filled into the required position during the injection molding process, thereby ensuring the accuracy and repeatability of the molding.

[0044] In some embodiments, as Figure 5 As shown, the ejector pin structure 204 includes a plurality of ejector pins 210 disposed on the second ejector plate 202 .

[0045] The ejector pin 210 has a simple structure and is easy to maintain. Multiple ejector pins 210 can distribute the ejection force more evenly, thereby reducing deformation or damage of the product during the ejection process.

[0046] In some embodiments, as Figure 1-2 As shown, the gate structure 403 includes a gate sleeve 404 arranged on the front mold core 105, and a pouring groove 405 with a narrow top and a wide bottom is provided inside the gate sleeve 404. The top width of the pouring groove 405 is smaller than the width of the diversion channel 402 connected thereto.

[0047] The design of being narrow at the top and wide at the bottom can effectively control the flow speed of the molten plastic, reduce the flow resistance, and make the melt more stable when entering the molding cavity 107, avoiding the generation of bubbles and flow marks. At the same time, by designing the top width of the casting groove 405 to be smaller than the width of the branch channel 402, the pressure loss of the melt during the flow process can be reduced. This structural design helps the molten plastic to quickly fill the mold cavity, ensuring that it can be quickly filled during the injection process, thereby improving the product's appearance molding quality and production efficiency.

[0048] The terms and words used in the above description and claims are not limited to their literal meanings, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present invention is provided for illustration only and is not intended to limit the present invention as defined in the appended claims and their equivalents.

Claims

1. A flip-chip injection mold, characterized in that: include: A panel (101), a nozzle plate (102), a front template (103) and a rear template (104) are sequentially arranged from top to bottom; a front mold core (105) is provided on the front template (103), and a rear mold core (106) is provided on the rear template (104); a molding cavity (107) is formed between the front mold core (105) and the rear mold core (106); an ejection structure (2) is provided between the nozzle plate (102) and the front template (103); one side of the ejection structure (2) is spaced apart from the front template (103) by a preset distance; both sides of the flip-chip injection mold are provided with a power structure (3) connected to the ejection structure (2) and the rear template (104) respectively; the ejection structure (2) is provided between the nozzle plate (102) and the front template (103); and a power structure (3) connected to the ejection structure (2) and the rear template (104) is provided on both sides of the flip-chip injection mold. The structure (2) comprises a first top plate (201) arranged on one side of the nozzle plate (102) and connected to the power structure (3), a second top plate (202) arranged below the first top plate (201), a slanted top assembly (203) for forming an undercut structure, and a top rod structure (204) arranged on the second top plate (202); a casting structure (4) is arranged on the panel (101), and the casting structure (4) comprises a main flow channel (401) arranged in the panel (101), a branch flow channel (402) connected to the main flow channel (401), and a gate structure (403) connected to the branch flow channel (402) and the molding cavity (107).

2. The flip-chip injection mold according to claim 1, characterized in that: The power structure (3) is provided with two groups on one side of the mold.

3. The flip-chip injection mold according to any one of claims 1-2, characterized in that: The power structure (3) includes a pull rod (301) connected to the first top plate (201) and the rear template (104); the pull rod (301) is provided with a first groove (302) and a second groove (303) for pulling the ejection structure (2); a first fastener (304) is fixed on the first top plate (201) and is slidably connected to the first groove (302); and a second fastener (305) is fixed on the rear template (104) and is slidably connected to the second groove (303).

4. The flip-chip injection mold according to claim 3, characterized in that: The length of the second groove (303) is greater than the length of the first groove (302).

5. The flip-chip injection mold according to claim 4, characterized in that: When the mold is closed, the first fastener (304) is arranged at the lower end of the first groove (302), and the second fastener (305) is arranged at the upper end of the second groove (303).

6. The flip-chip injection mold according to claim 1, characterized in that: A plurality of nylon rubber plugs (5) are provided between the front template (103) and the rear template (104).

7. The flip-chip injection mold according to claim 1, characterized in that: The inclined ejector assembly (203) includes a slider seat (205) fixed on the second ejector plate (202), an inclined ejector rod (206) slidably connected to the slider seat (205) and inclined toward the inner side of the mold, and a molding portion (207) for molding is provided on one side of the inclined ejector rod (206).

8. The flip-chip injection mold according to claim 7, characterized in that: The inclined ejector rod (206) comprises an L-shaped structure for positioning, and a positioning groove (209) matching the L-shaped structure is provided in the front mold core (105).

9. The flip-chip injection mold according to claim 1, characterized in that: The ejector pin structure (204) includes a plurality of ejector pins (210) disposed on the second ejector plate (202).

10. The flip-chip injection mold according to claim 1, characterized in that: The gate structure (403) includes a gate sleeve (404) arranged on the front mold core (105), and a pouring groove (405) that is narrow at the top and wide at the bottom is provided inside the gate sleeve (404), and the top width of the pouring groove (405) is smaller than the width of the diverter channel (402) connected thereto.

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