Precise injection mold for plastic products

Abstract

The utility model discloses a precise injection mold for plastic products, which relates to the field of injection molding devices and comprises a mounting base, a top plate fixedly mounted at the top of the mounting base, a lower mold arranged at the top of the mounting base, and an upper mold arranged at the top of the lower mold. According to the precise injection mold for the plastic product, the sealing assemblies are arranged at the two sets of molds, the peripheral wall of the joint of the two sets of molds can be sealed through the two sets of sealing plates, the joint of the two sets of molds is sealed through the sealing frame, and the sealing effect between the two sets of molds is improved; the situation that raw materials overflow in the injection molding process is avoided, meanwhile, the two sets of sealing plates are connected with the driving motor through the transmission assembly, the two sets of sealing plates can be driven to be clamped and attached to the connecting position of the two sets of molds to seal the two sets of molds in the mold closing process, and an extra external driver does not need to drive the two sets of sealing plates to be close for sealing; and the processing cost of the plastic product can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a precision injection mold for plastic products. Background Technology

[0002] Plastic products are a general term for daily necessities and industrial products made primarily from plastics. They include all products manufactured using processes such as injection molding and vacuum forming. Plastics are a type of synthetic polymer material with plasticity. Injection molds are used in the production of plastic products.

[0003] When processing plastic products, two sets of molds must first be closed. After closure, plastic raw materials are added into the two sets of molds. After the raw materials cool and solidify, the two sets of molds are separated by a drive component, and the cooled plastic products can be disassembled from the molds. However, in actual use, after the two sets of molds are closed, the raw materials inside are prone to overflow through the connection between the two sets of molds, resulting in material waste and increasing processing costs. To address the shortcomings of existing technologies, we propose a precision injection mold for plastic products to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a precision injection mold for plastic products, comprising a mounting base, a top plate fixedly mounted on the top of the mounting base, a lower mold disposed on the top of the mounting base, an upper mold disposed on the top of the lower mold, an ejector assembly disposed inside the lower mold, a drive motor fixedly mounted on the top of the top plate, the drive motor driving the upper mold to move up and down, a sealing assembly disposed at the connection between the lower mold and the upper mold, the sealing assembly comprising a first sealing plate, a second sealing plate, and a sealing frame, the first sealing plate and the second sealing plate respectively fitting against the outer peripheral wall of the connection between the lower mold and the upper mold, and the sealing frame fixedly mounted on the bottom of the upper mold;

[0005] The bottom of the drive motor is connected to a transmission assembly, and the operation of the drive motor causes the transmission assembly to move the two sets of sealing plates.

[0006] Preferably, the upper mold has telescopic rods fixedly connected to both sides of its top, and the top ends of the telescopic rods are fixedly installed on the bottom end face of the top plate. The material ejection assembly includes a material ejection cylinder and a material ejection plate.

[0007] Preferably, the top material cylinder is fixedly installed on the top of the mounting base, the top material plate is slidably connected inside the lower mold, and the output end of the top material cylinder is fixedly connected to the top material plate.

[0008] Preferably, the transmission assembly includes a horizontal frame, a vertical frame, a bidirectional screw, a transmission lead screw, a first gear, a second gear, a first driving component, a driving plate, a second driving component, and a driving rod.

[0009] Preferably, the horizontal frame is fixedly installed on one side of the vertical frame, the horizontal frame is fixedly installed at the bottom of the lower mold, the bidirectional screw and the transmission screw are rotatably connected inside the horizontal frame and the vertical frame respectively, and the first driving component is slidably sleeved on both sides of the outer peripheral wall of the bidirectional screw.

[0010] Preferably, the first gear and the second gear are respectively fixedly installed at one end of the bidirectional screw and the transmission lead screw, the first gear and the second gear mesh with each other, and the top end of the transmission lead screw is fixedly connected to the output end of the drive motor.

[0011] Preferably, the drive plate is fixedly installed on the top of the first drive component, and the two sets of drive plates are respectively fixedly connected to the first sealing plate and the second sealing plate.

[0012] Preferably, the second driving component is slidably sleeved on the outer peripheral wall of the transmission screw, and the driving rod is fixedly installed between the second driving component and the upper mold.

[0013] This utility model discloses a precision injection mold for plastic products, which has the following beneficial effects: By setting sealing components at two sets of molds, the precision injection mold for plastic products can seal the outer peripheral wall of the connection between the two sets of molds through two sets of sealing plates, and seal the connection between the two sets of molds through a sealing frame, thereby improving the sealing effect between the two sets of molds and preventing material overflow during injection molding. At the same time, by connecting the two sets of sealing plates to the drive motor through the transmission component, the two sets of sealing plates can be driven to clamp and fit against the connection between the two sets of molds during the mold closing process to seal them, without the need for an additional external driver to drive the two sets of sealing plates close together for sealing, thereby reducing the processing cost of plastic products. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the sealing component and the two sets of molds of this utility model;

[0017] Figure 3This is a schematic diagram of the connection structure between the transmission component, the upper mold, and the sealing component of this utility model;

[0018] Figure 4 This is a schematic diagram of the transmission component structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the two sets of molds of this utility model.

[0020] In the diagram: 1. Mounting base; 101. Top plate; 2. Lower mold; 201. Ejector cylinder; 202. Ejector plate; 3. Upper mold; 301. Telescopic rod; 4. Drive motor; 5. Sealing assembly; 501. First sealing plate; 502. Second sealing plate; 503. Sealing frame; 6. Transmission assembly; 601. Horizontal frame; 602. Vertical frame; 603. Bidirectional screw; 604. Transmission lead screw; 605. First gear; 606. Second gear; 607. First driving component; 608. Drive plate; 609. Second driving component; 610. Drive rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] This utility model discloses a precision injection mold for plastic products.

[0024] According to the appendix Figure 1-5As shown, the system includes a mounting base 1, a top plate 101 fixedly mounted on the top of the mounting base 1, a lower mold 2 mounted on the top of the mounting base 1, an upper mold 3 mounted on the top of the lower mold 2, an ejector assembly inside the lower mold 2, a drive motor 4 fixedly mounted on the top of the top plate 101, and the drive motor 4 drives the upper mold 3 to move up and down. A sealing assembly 5 is provided at the connection between the lower mold 2 and the upper mold 3. The sealing assembly 5 includes a first sealing plate 501, a second sealing plate 502, and a sealing frame 503. Two sealing plates 502 are respectively attached to the outer peripheral wall of the connection between the lower mold 2 and the upper mold 3, and the sealing frame 503 is fixedly installed at the bottom of the upper mold 3. In use, the upper mold 3 is first moved down to the top of the lower mold 2 by the drive motor 4, and the two sets of molds are closed. Then, the raw material is injected into the two sets of molds through the injection tube at the top of the upper mold 3. After cooling, the upper mold 3 is moved up. With the cooperation of the ejector assembly, the cooled plastic product inside the lower mold 2 can be separated from the lower mold 2, realizing the processing operation of the plastic product.

[0025] The bottom of the drive motor 4 is connected to the transmission component 6. When the drive motor 4 works, the transmission component 6 drives the two sets of sealing plates to move. During the processing, the sealing plates on both sides can fit against the outer peripheral wall of the connection between the upper mold 3 and the lower mold 2. At the same time, the sealing frame 503 can be inserted into the top of the lower mold 2, thereby avoiding obstruction and sealing at the connection, improving the precision of the connection between the two sets of molds, and ensuring that the injection molding material overflows through the connection between the two sets of molds, thereby reducing processing costs.

[0026] Telescopic rods 301 are fixedly connected to the top two sides of the upper mold 3. The top ends of the telescopic rods 301 are fixedly installed on the bottom end face of the top plate 101. The telescopic rods 301 connect the upper mold 3 and the top plate 101 and serve as guides to ensure the accuracy of the upper mold 3 closing with the lower mold 2 during the downward movement. The ejector assembly includes an ejector cylinder 201 and an ejector plate 202. The ejector cylinder 201 is fixedly installed on the top of the mounting base 1, and the ejector plate 202 is slidably connected inside the lower mold 2. The output end of the ejector cylinder 201 is fixedly connected to the ejector plate 202. Then, through the operation of the drive motor 4, the transmission assembly 6 drives the upper mold 3 to move downward and close with the lower mold 2. At the same time, the transmission assembly 6 drives the sealing plates on both sides to slide closer to each other, so that the sealing plates on both sides are tightly attached to the outer peripheral wall of the connection between the two sets of molds, sealing it and preventing the raw material from overflowing through the connection between the two sets of molds. For details, please refer to the appendix. Figure 2 .

[0027] The transmission assembly 6 includes a horizontal frame 601, a vertical frame 602, a bidirectional screw 603, a transmission lead screw 604, a first gear 605, a second gear 606, a first driving component 607, a driving plate 608, a second driving component 609, and a driving rod 610. The drive motor 4 operates, driving the transmission lead screw 604 to rotate, causing the second driving component 609 and the driving rod 610 to move the upper mold 3 downward, so that the sealing frame 503 is inserted into the top of the lower mold 2, realizing the mold closing operation of the two sets of molds. At the same time, when the transmission lead screw 604 rotates, through the meshing between the two sets of gears, it can simultaneously drive the bidirectional screw 603 to rotate inside the horizontal frame 601, so that the first driving components 607 and the driving plate 608 on both sides simultaneously drive the sealing plates on both sides to slide closer to each other. When the upper mold 3 and the lower mold 2 are closed, the two sets of sealing plates are attached to the outer peripheral wall of the mold connection after mold closing. Through the cooperation of the two sets of sealing plates and the sealing frame 503, the sealing effect of the two sets of molds can be improved.

[0028] The horizontal frame 601 is fixedly installed on one side of the vertical frame 602. The horizontal frame 601 is also fixedly installed at the bottom of the lower mold 2. The bidirectional screw 603 and the transmission screw 604 are rotatably connected inside the horizontal frame 601 and the vertical frame 602, respectively. The first driving component 607 is slidably sleeved on both sides of the outer peripheral wall of the bidirectional screw 603. The first gear 605 and the second gear 606 are fixedly installed at one end of the bidirectional screw 603 and the transmission screw 604, respectively. The first gear 605 and the second gear 606 mesh with each other. The top end of the transmission screw 604 is fixedly connected to the output end of the drive motor 4. Sealing strips are provided on the inner walls of the two sets of sealing plates and the bottom of the sealing frame 503, which can seal the connection between the two sets of molds.

[0029] The drive plate 608 is fixedly installed on the top of the first drive component 607. Two sets of drive plates 608 are respectively fixedly connected to the first sealing plate 501 and the second sealing plate 502. The second drive component 609 is slidably sleeved on the outer peripheral wall of the transmission screw 604. The drive rod 610 is fixedly installed between the second drive component 609 and the upper mold 3. When the two sets of sealing plates are in a state of mutual distance, the upper mold 3 is in a rising state. (See attached diagram for details.) Figure 4 .

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision injection mold for plastic products, comprising a mounting base (1), a top plate (101) fixedly mounted on the top of the mounting base (1), a lower mold (2) disposed on the top of the mounting base (1), an upper mold (3) disposed on the top of the lower mold (2), and an ejector assembly disposed inside the lower mold (2), characterized in that: The top of the top plate (101) is fixedly provided with a driving motor (4), the driving motor (4) drives the upper mold (3) to move up and down, the lower mold (2) and the upper mold (3) are provided with a sealing assembly (5) at the connecting position, the sealing assembly (5) comprises a first sealing plate (501), a second sealing plate (502) and a sealing frame (503), the first sealing plate (501) and the second sealing plate (502) are respectively attached to the outer circumferential wall of the connecting position of the lower mold (2) and the upper mold (3), and the sealing frame (503) is fixedly installed at the bottom of the upper mold (3). The bottom of the driving motor (4) is connected with a transmission assembly (6), and the driving motor (4) works to drive the two groups of sealing plates to move.

2. The precision injection mold for plastic articles according to claim 1, characterized in that: The top of the upper mold (3) is fixedly connected with telescopic rods (301) on both sides, the top ends of the telescopic rods (301) are fixedly installed on the bottom end face of the top plate (101), and the top feeding assembly comprises a top feeding cylinder (201) and a top feeding plate (202).

3. The precision injection mold for plastic articles of claim 2, wherein: The top feeding cylinder (201) is fixedly installed on the top of the mounting base (1), the top feeding plate (202) is slidably connected in the lower mold (2), and the output end of the top feeding cylinder (201) is fixedly connected with the top feeding plate (202).

4. The precision injection mold for plastic articles of claim 1, wherein: The transmission assembly (6) comprises a horizontal frame (601), a vertical frame (602), a bidirectional screw (603), a transmission screw rod (604), a first gear (605), a second gear (606), a first driving member (607), a driving plate (608), a second driving member (609) and a driving rod (610).

5. The precision injection mold for plastic articles of claim 4, wherein: The horizontal frame (601) is fixedly installed on one side of the vertical frame (602), the horizontal frame (601) is fixedly installed at the bottom of the lower mold (2), the bidirectional screw (603) and the transmission screw rod (604) are rotatably connected in the horizontal frame (601) and the vertical frame (602) respectively, and the first driving member (607) is slidably sleeved on the outer circumferential wall of the bidirectional screw (603) on both sides.

6. The precision injection mold for plastic articles of claim 5, wherein: The first gear (605) and the second gear (606) are fixedly installed at one end of the bidirectional screw (603) and the transmission screw rod (604) respectively, the first gear (605) and the second gear (606) are meshed with each other, and the top end of the transmission screw rod (604) is fixedly connected with the output end of the driving motor (4).

7. The precision injection mold for plastic articles of claim 6, wherein: The driving plate (608) is fixedly installed on the top of the first driving member (607), and two groups of the driving plate (608) are fixedly connected with the first sealing plate (501) and the second sealing plate (502) respectively.

8. The precision injection mold for plastic articles of claim 7, wherein: The second driving member (609) is slidably sleeved on the outer circumferential wall of the transmission screw rod (604), and the driving rod (610) is fixedly installed between the second driving member (609) and the upper mold (3).

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