Plastic package mold

Abstract

The utility model relates to the technical field of plastic package molds, in particular to a plastic package mold, which comprises an upper mold, a lower mold, a first cavity, a second cavity, a third cavity, a fourth cavity, a sprue, a runner ejector rod hole, a runner and a flow limiting device, the runner is arranged in the middle of the lower mold and communicated with the runner ejector rod hole, the first cavities, the second cavities, the third cavities and the fourth cavities are arranged on the lower mold in the length direction of the runner, and the side, facing the lower mold, of the upper mold is of a plane structure. According to the plastic packaging mold, the plastic packaging efficiency and quality are improved, the packaging requirement of one-injection-four products is met, and the problems of back bulging and layering of the plastic packaging products are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging molds, in particular to a plastic packaging mold. Background Art

[0002] Plastic encapsulation technology primarily involves encapsulating electronic components with polymer-based encapsulation materials through injection molding, compression molding, and other molding methods. This provides structural support and electrical insulation, while also shielding them from the effects of the external environment on product performance. With the increasing integration of electronic product functionality, the reliability requirements for their components are increasing, and plastic encapsulation technology is becoming increasingly important in the field of electronic packaging. Existing plastic encapsulation products utilize aluminum ribbon as a bridge connection, which offers high reliability and excellent heat dissipation. To achieve this, the thinner the plastic encapsulation, the better. However, as the area of the internal aluminum ribbon structure and chip increases, the space reserved for the plastic encapsulation becomes smaller. Furthermore, existing plastic encapsulation molds can only meet the requirements of a one-injection-two-packaging system, not a one-injection-four-packaging system. During the injection molding process, the mold flow rate is uncontrolled, and the product is prone to back bulging and delamination.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a plastic encapsulation mold to solve the problem that the existing plastic encapsulation mold cannot meet the packaging requirements of one injection four and the quality of the plastic encapsulated products is poor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A plastic encapsulation mold comprises an upper mold, a lower mold, a first cavity, a second cavity, a third cavity, a fourth cavity, a gate, a glue channel push rod hole, a runner and a flow limiting device, wherein the glue channel push rod hole is arranged through the upper mold, the runner is arranged in the middle of the lower mold and is connected to the glue channel push rod hole, the first cavity, the second cavity, the third cavity and the fourth cavity respectively include a plurality of them and are respectively arranged on the lower mold along the length direction of the runner, the side of the upper mold facing the lower mold is a planar structure, the first cavity and the second cavity are respectively arranged on one side of the runner, the third cavity and the fourth cavity are respectively arranged on the other side of the runner, the gate and the flow limiting device respectively include a plurality of them, the gate and the flow limiting device are arranged in one-to-one correspondence, and any of the gates are respectively connected to the runner, the first cavity, the second cavity, the third cavity and the fourth cavity.

[0007] As described above, in a plastic encapsulation mold, any of the gates includes a first gate, a second gate and two third gates, and the flow limiting device includes four flow limiting mechanisms respectively corresponding to the first gate, the second gate and the two third gates. The first gate and the second gate are respectively arranged on both sides of the runner, the first gate connects the runner and the first cavity, the second gate connects the runner and the third cavity, any of the third gates connects the first cavity and the second cavity, and the other third gate connects the third cavity and the fourth cavity.

[0008] In the plastic encapsulation mold as described above, the first gate and the second gate are respectively arranged along the width direction of the lower mold, the two third gates are respectively arranged along the width direction of the lower mold, and the first gate and any of the third gates are staggered.

[0009] In the above-mentioned plastic encapsulation mold, the current limiting mechanism includes a convex block protruding from the upper mold, and the height of the convex block is smaller than the height of the gate.

[0010] In the above-mentioned plastic encapsulation mold, a plurality of lead grooves are respectively provided on both sides of the lower mold, and any of the lead grooves is connected to the second cavity or the fourth cavity.

[0011] In the above-mentioned plastic encapsulation mold, a plurality of exhaust grooves are respectively provided on both sides of the lower mold, and any of the exhaust grooves is communicated with the second cavity or the fourth cavity.

[0012] Beneficial effects:

[0013] The utility model discloses a plastic sealing mold, comprising an upper mold, a lower mold, a first cavity, a second cavity, a third cavity, a fourth cavity, a gate, a glue channel push rod hole, a runner and a flow limiting device, the glue channel push rod hole connects the hot nozzle and the runner, the runner guides the plastic sealing material to the first cavity, the second cavity, the third cavity and the fourth cavity through the gate, the flow limiting device cooperates with the gate to limit the flow rate of the plastic sealing material, wherein the first cavity, the second cavity, the third cavity and the fourth cavity are arranged on the lower mold, the side of the upper mold facing the lower mold is a planar structure, the plastic sealing material adheres to the upper mold and flows into the first cavity, the second cavity, the third cavity and the fourth cavity on the lower mold, guiding the plastic sealing material to flow into the cavity, the plastic sealing mold disclosed in the application improves the efficiency and quality of plastic sealing, meets the packaging requirements of one injection four products, and avoids bulging on the back of the plastic sealing product, BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of the upper mold provided by the utility model;

[0015] Figure 2 A schematic structural diagram of the lower mold provided by the utility model;

[0016] Figure numerals: 1, upper mold; 2, lower mold; 21, lead groove; 22, exhaust groove; 3, first cavity; 4, second cavity; 5, third cavity; 6, fourth cavity; 7, gate; 71, first gate; 72, second gate; 73, third gate; 8, glue channel ejector pin hole; 9, runner; 10, current limiting device. DETAILED DESCRIPTION

[0017] The present invention provides a plastic sealing mold. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0018] In the description of the present invention, it should be understood that the orientation or position relationship indicated by the term "top" is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and cannot be understood as a limitation on the present invention; in addition, the terms "installation" and "connection" should be understood in a broad sense. For ordinary technicians in this field, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0019] like Figure 1-2 As shown, the embodiment of the present application proposes a plastic encapsulation mold, including an upper mold 1, a lower mold 2, a first cavity 3, a second cavity 4, a third cavity 5, a fourth cavity 6, a gate 7, a glue channel ejector hole 8, a runner 9 and a flow limiting device 10, the glue channel ejector hole 8 is provided on the upper mold 1, the runner 9 is provided in the middle of the lower mold 2 and is connected to the glue channel ejector hole 8, the first cavity 3, the second cavity 4, the third cavity 5 and the fourth cavity 6 respectively include a plurality of and are arranged along the length direction of the runner 9. On the lower mold 2, the side of the upper mold 1 facing the lower mold 2 is a planar structure, the first cavity 3 and the second cavity 4 are respectively arranged on one side of the runner 9, the third cavity 3 and the fourth cavity 4 are respectively arranged on the other side of the runner 9, the gate 7 and the flow limiting device 10 respectively include several, the gate 7 and the flow limiting device 10 are arranged in one-to-one correspondence, and any of the gates 7 are respectively connected to the runner 9, the first cavity 3, the second cavity 4, the third cavity 5 and the fourth cavity 6.

[0020] The utility model discloses a plastic encapsulation mold, comprising an upper mold 1, a lower mold 2, a first cavity 3, a second cavity 4, a third cavity 5, a fourth cavity 6, a gate 7, a glue channel ejector hole 8, a runner 9 and a flow limiting device 10, wherein the glue channel ejector hole 8 communicates with the hot nozzle and the runner 9, and the runner 9 guides the plastic encapsulation material to the first cavity 3, the second cavity 4, the third cavity 5 and the fourth cavity 6 through the gate 7, and the flow limiting device 10 cooperates with the gate 7 to limit the flow rate of the plastic encapsulation material, wherein the first cavity 3. The second cavity 4, the third cavity 5 and the fourth cavity 6 are arranged on the lower mold 2. The side of the upper mold 1 facing the lower mold 2 is a planar structure. The plastic encapsulation material adheres to the upper mold 1 and flows into the first cavity 3, the second cavity 4, the third cavity 5 and the fourth cavity 6 on the lower mold 2, guiding the plastic encapsulation material to flow into the cavity. The plastic encapsulation mold disclosed in this application improves the efficiency and quality of plastic encapsulation, meets the packaging requirements of one-injection four-product, and avoids the problems of bulging and delamination on the back of the plastic encapsulated product.

[0021] Any of the gates 7 includes a first gate 71, a second gate 72 and two third gates 73, and the flow limiting device 10 includes four flow limiting mechanisms corresponding to the first gate 71, the second gate 72 and the two third gates 73, respectively. The first gate 71 and the second gate 72 are respectively arranged on both sides of the runner 9, the first gate 71 connects the runner 9 and the first cavity 3, the second gate 72 connects the runner 9 and the third cavity 5, any of the third gates 73 connects the first cavity 3 and the second cavity 4, and the other third gate 73 The third cavity 5 and the fourth cavity 6 are connected, and the first cavity 3, the second cavity 4, the third cavity 5 and the fourth cavity 6 are respectively arranged along the width direction of the lower mold 2. The plastic encapsulation material in the runner 9 flows into the first cavity 3 and the third cavity 5 on both sides respectively through the first gate 71 and the second gate 72. The plastic encapsulation material in the first cavity 3 flows into the second cavity 4 through any of the third gates 73, and the plastic encapsulation material in the third cavity 5 flows into the fourth cavity 6 through any of the third gates 73, thereby reducing the flow channel and avoiding affecting the flow pressure.

[0022] The first gate 71 and the second gate 72 are respectively arranged along the width direction of the lower mold 2, and the two third gates 73 are respectively arranged along the width direction of the lower mold 2. The first gate 71 and any one of the third gates 73 are staggered. When the molding compound passes through the first gate 71 or the second gate 72, it must fill the first cavity 3 or the third cavity 5 before flowing into the next cavity through the third gate 73, so as to avoid the diversion of the third gate 73 and cause the cavities on both sides of the third gate to be not filled with molding compound, thereby ensuring the quality of packaging.

[0023] The flow limiting mechanism 10 includes a protrusion protruding from the upper mold 1, and the height of the protrusion is smaller than the height of the gate 7. When the upper mold 1 and the lower mold 2 are closed, the protrusion is inserted into the gate 7, reducing the diameter of the plastic encapsulation material passing through, slowing down the flow rate of the plastic encapsulation material, so that the plastic encapsulation material can evenly cover the cavity.

[0024] A plurality of lead grooves 21 are provided on both sides of the lower mold 2. Any of the lead grooves 21 is connected to the second cavity 4 or the fourth cavity 6. The leads are led out of the mold through the lead grooves 21, which facilitates the circuit arrangement of the plastic-sealed product.

[0025] A plurality of exhaust grooves 22 are respectively provided on both sides of the lower mold 2. Any of the exhaust grooves 22 is connected to the second cavity 4 or the fourth cavity 6. The gas in each cavity is discharged through the exhaust grooves 22 to avoid accumulation in the cavity and affecting the filling of the plastic packaging material, thereby avoiding bulging and delamination problems in the plastic packaging product.

[0026] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A plastic encapsulation mold, characterized in that: The invention comprises an upper mold (1), a lower mold (2), a first mold cavity (3), a second mold cavity (4), a third mold cavity (5), a fourth mold cavity (6), a gate (7), a glue channel push rod hole (8), a flow channel (9) and a flow limiting device (10), wherein the glue channel push rod hole (8) is provided on the upper mold (1), the flow channel (9) is provided in the middle of the lower mold (2) and is connected with the glue channel push rod hole (8), the first mold cavity (3), the second mold cavity (4), the third mold cavity (5) and the fourth mold cavity (6) respectively include a plurality of molds and are arranged on the lower mold (2) along the length direction of the flow channel (9). The side of the upper mold (1) facing the lower mold (2) is a planar structure, the first cavity (3) and the second cavity (4) are respectively arranged on one side of the runner (9), the third cavity (5) and the fourth cavity (6) are respectively arranged on the other side of the runner (9), the gate (7) and the flow limiting device (10) respectively include a plurality of gates (7) and the flow limiting device (10), and the gates (7) and the flow limiting device (10) are arranged in a one-to-one correspondence, and any gate (7) is respectively connected to the runner (9), the first cavity (3), the second cavity (4), the third cavity (5) and the fourth cavity (6).

2. A plastic encapsulation mold according to claim 1, characterized in that: Any of the gates (7) includes a first gate (71), a second gate (72) and two third gates (73); the flow limiting device (10) includes four flow limiting mechanisms respectively corresponding to the first gate (71), the second gate (72) and the two third gates (73); the first gate (71) and the second gate (72) are respectively arranged on both sides of the runner (9); the first gate (71) connects the runner (9) and the first cavity (3); the second gate (72) connects the runner (9) and the third cavity (5); any of the third gates (73) connects the first cavity (3) and the second cavity (4); and the other third gate (73) connects the third cavity (5) and the fourth cavity (6).

3. A plastic encapsulation mold according to claim 2, characterized in that: The first gate (71) and the second gate (72) are respectively arranged along the width direction of the lower mold (2), the two third gates (73) are respectively arranged along the width direction of the lower mold (2), and the first gate (71) and any one of the third gates (73) are staggered.

4. The plastic encapsulation mold according to claim 2, characterized in that: The current limiting device (10) comprises a convex block protruding from the upper mold (1), and the height of the convex block is smaller than the height of the gate (7).

5. The plastic encapsulation mold according to claim 1, characterized in that: A plurality of lead grooves (21) are respectively provided on both sides of the lower mold (2), and any one of the lead grooves (21) is communicated with the second mold cavity (4) or the fourth mold cavity (6).

6. The plastic encapsulation mold according to claim 1, characterized in that: A plurality of exhaust grooves (22) are respectively provided on both sides of the lower mold (2), and any of the exhaust grooves (22) is communicated with the second mold cavity (4) or the fourth mold cavity (6).

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