A mold opening mechanism and injection mold

Abstract

The present application relates to a mold opening mechanism and an injection mold, which relates to the technical field of injection molds. The mold opening mechanism includes a movable pull rod, an elastic locking piece and a fixed pull rod. The movable pull rod slides inside the fixed pull rod, and the movable pull rod is used in conjunction with the elastic locking piece. When the mold is closed, the elastic locking piece engages with the movable pull rod. When the mold is opened, the movable pull rod drives the elastic locking piece to move. When the elastic locking piece moves to contact with the fixed pull rod, the elastic locking piece retracts and disengages from the movable pull rod. The mold opening mechanism of the present application has a simple structural design, which can achieve the effect of simply controlling the mold opening sequence, making the mold opening process smoother. Moreover, the drive of the mold opening mechanism of the present application acts directly on the mold, and does not directly act on the product, so as to ensure the appearance of the product. When the present application is used in actual production, it can improve the mold opening efficiency and product quality.

Description

Technical Field

[0001] The present application relates to the field of injection molds, and in particular to a mold opening mechanism and an injection mold. Background Art

[0002] As a tool for producing plastic products, injection molds have the ability to give plastic products complete structures and precise dimensions. Existing injection molds usually consist of two parts: a movable mold and a fixed mold. The movable mold is installed on the movable mold plate of the injection molding machine, while the fixed mold is installed on the fixed mold plate of the injection molding machine. During the injection molding process, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to separate the product from the mold.

[0003] In the process of making plastic products, some products have complex structures and need to use movable slide structures to form product surfaces and achieve separation from the products. Technicians usually use multi-cavity molds or composite molds to achieve this. In the demolding process, it is necessary to demold in sequence. In order to ensure the smooth progress of the demolding process, various manufacturers have designed various mechanisms that can achieve sequential demolding. However, the existing mechanisms are usually complex in structure, large in size, and limited by the use space, so it is urgent to develop a mechanism that can easily control the mold opening sequence. Utility Model Content

[0004] In order to develop a mechanism that can easily control the mold opening sequence, the present application provides a mold opening mechanism and an injection mold.

[0005] The present application provides a mold opening mechanism and an injection mold using the following technical solutions:

[0006] A mold opening mechanism is used for mold opening, comprising a movable pull rod, an elastic locking piece and a fixed pull rod, wherein the movable pull rod slides inside the fixed pull rod, and the movable pull rod is used in conjunction with the elastic locking piece; when the mold is closed, the elastic locking piece is engaged with the movable pull rod, and when the mold is opened, the movable pull rod drives the elastic locking piece to move, and when the elastic locking piece moves to contact the fixed pull rod, the elastic locking piece retracts and disengages from the movable pull rod.

[0007] By adopting the above technical scheme, when the mold needs to be opened, the movable pull rod is driven to slide in the fixed pull rod. At this time, due to the clamping fit between the elastic locking piece and the movable pull rod, the movable pull rod will drive the elastic locking piece to move, thereby realizing one-time opening of the mold. When the elastic locking piece moves to contact with the fixed pull rod, the elastic locking piece retracts and disengages from the movable pull rod. At this time, the movable pull rod continues to move, thereby realizing the secondary opening of the mold and completing the opening of the entire mold. The mold opening mechanism of the present application has a simple structural design and can achieve the effect of simply controlling the mold opening sequence, thereby making the mold opening process smoother. In addition, the drive of the mold opening mechanism of the present application directly acts on the mold, and does not directly act on the product, thereby ensuring the appearance of the product. When the present application is used in actual production, it can improve mold opening efficiency and product quality.

[0008] In a specific possible implementation scheme, the elastic locking member includes a locking seat, a locking block and a spring arranged in the locking seat; a hook portion is provided on the movable pull rod, and the locking block extends out of the locking seat and engages with the hook portion.

[0009] By adopting the above technical solution and utilizing the design of the locking seat, locking block, spring and hook, elastic locking can be achieved when the mold is closed, and the mold can be kept in a closed state by the cooperation between the locking block and the hook; when the mold needs to be opened, the movement of the movable pull rod will cause the locking block to disengage from the hook, so that the elastic locking part retracts and disengages from the movable pull rod under the action of the spring, thereby completing the mold opening operation. This design can provide stable locking and reliable release functions during mold operation.

[0010] In a specific implementation scheme, the length of the locking block extending from the locking seat is set to A, the width of the contact surface when the hook portion abuts the locking block is set to B, and the range of B / A is 1 / 2-1.

[0011] By adopting the above technical solution, the ratio range of the contact surface width when the hook part and the locking block are abutted to the protruding length of the locking block is limited, which can ensure that the hook part and the locking block are firmly locked in the closed state, and the hook part and the locking block can be reliably disengaged and released when necessary, thereby improving the safety and stability of the mold operation.

[0012] In a specific possible implementation scheme, a stop bevel is provided on the fixed pull rod, and a matching bevel is provided on the locking block; after the matching bevel abuts against the stop bevel, the fixed pull rod exerts pressure on the locking block and the spring so that the locking block retracts and disengages from the hook portion.

[0013] By adopting the above technical solution and utilizing the design of the specific inclined surface between the fixed pull rod and the locking block, when the stop inclined surface abuts against the mating inclined surface, the movement of the fixed pull rod will exert pressure on the locking block and the spring, causing the locking block to retract and disengage from the hook portion, thereby achieving reliable opening operation of the mold, which helps to ensure the stability and reliability of the mold when opening.

[0014] In a specific possible implementation mode, the hook portion is provided with a reset slope, and after the matching slope abuts against the reset slope, the movable pull rod exerts pressure on the locking block and the spring to retract the locking block, thereby resetting the movable pull rod.

[0015] By adopting the above technical solution, utilizing the specific inclined plane design between the hook portion and the locking block, when the reset inclined plane abuts against the mating inclined plane, the movement of the movable pull rod will exert pressure on the locking block and the spring, causing the locking block to retract, so that the movable pull rod can continue to move. At this time, when the extrusion on the locking block is released, the spring pushes the locking block to move toward the side of the movable pull rod, and enables the locking block to engage with the hook portion of the movable pull rod again, thereby realizing the reset operation of the movable pull rod, which helps to ensure that the mold opening mechanism can quickly return to its initial state after demolding is completed, thereby improving the efficiency and reliability of the overall operation.

[0016] In a specific possible implementation manner, the locking seat is provided with a locking groove, the spring and the locking block are arranged in the locking groove, and the locking block slides in the locking groove and contacts with the inner wall of the locking groove.

[0017] By adopting the above technical solution, the spring and the locking block are arranged in the locking groove, and the locking block slides in the groove and contacts the inner wall of the groove, thereby realizing the function of the locking piece, thereby ensuring that the locking block remains stable during the movement and can effectively realize the locking and releasing operations.

[0018] In a specific possible implementation mode, mounting holes are provided on the movable pull rod, the fixed pull rod and the locking seat.

[0019] By adopting the above technical solution and utilizing the setting of the mounting holes, the movable pull rod, fixed pull rod and locking seat can be conveniently assembled with other components or structures to form a complete mechanical system or device, which can improve assembly efficiency and also help ensure a firm connection between the components.

[0020] In a specific possible implementation manner, a slide groove is provided in the fixed pull rod, and the movable pull rod slides in the slide groove and contacts with an inner wall of the slide groove.

[0021] By adopting the above technical solution and utilizing the setting of the slide groove, the movable pull rod can slide inside the slide groove and contact the inner wall of the slide groove; thereby helping to achieve coordinated movement and constraint relationship between the fixed pull rod and the movable pull rod, which can increase the stability and reliability of the mold opening mechanism, and also improve its service life and operating efficiency.

[0022] An injection mold comprises a mold opening mechanism as described above, wherein the injection mold comprises a movable plate, a cavity plate and a fixed plate, wherein the cavity plate is arranged between the movable plate and the fixed plate, the fixed pull rod is arranged on the fixed plate, the movable pull rod is arranged on the movable plate and slides inside the fixed pull rod, and the elastic locking piece is arranged on the cavity plate and is engaged with the movable pull rod.

[0023] By adopting the above technical scheme, when working, the movable plate is driven to move, thereby driving the movable pull rod set thereon to slide and move in the fixed pull rod. At this time, due to the abutment and cooperation between the elastic locking piece and the movable pull rod, the movable pull rod will drive the elastic locking piece to move, thereby driving the cavity plate to move together, so that the cavity plate is separated from the fixed plate, and the one-time mold opening of the injection mold is realized; when the elastic locking piece moves to contact with the fixed pull rod, the elastic locking piece retracts and disengages from the movable pull rod, at this time, the movable plate continues to move and drives the movable pull rod to continue to move, so as to separate the movable plate from the cavity plate, thereby realizing the secondary mold opening of the mold and completing the mold opening work of the entire mold; the mold opening mechanism used in the injection mold of the present application can achieve the purpose of simply controlling the mold opening sequence of the injection mold, so that the mold opening process of the injection mold is smoother; and it directly acts on the injection mold by driving, and does not directly act on the product, so as to ensure the appearance of the product. When the present application is used in actual production, it can improve the mold opening efficiency and product quality.

[0024] In a specific possible implementation manner, the injection mold is further provided with a driving member, and the driving member drives the movable plate to move.

[0025] By adopting the above technical solution and utilizing the design of the driving component, it is possible to realize the movement control of the movable plate and the control of the mold opening mechanism, thereby controlling the opening and closing action of the injection mold, ensuring that the injection mold and the mold opening mechanism can move according to the predetermined path and speed when the mold is opened. The setting of the driving component helps to improve the automation degree and production efficiency of the mold, thereby improving the stability and consistency of production.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The mold opening mechanism of the present application has a simple structural design. Through the design of the locking seat, the locking block, the spring and the hook part, elastic locking can be achieved when the mold is closed, and the mold closed state is maintained by the clamping cooperation between the locking block and the hook part; when the mold needs to be opened, the movement of the movable pull rod causes the locking block to disengage from the hook part, so that the elastic locking piece retracts and disengages from the movable pull rod under the action of the spring; thus, the present application can achieve the effect of simply controlling the mold opening sequence, making the mold opening process smoother, and improving the mold opening efficiency and product quality;

[0028] 2. The present application defines the ratio range of the width of the contact surface when the hook portion and the locking block are in contact with each other to the extended length of the locking block, which can ensure that the hook portion and the locking block are firmly locked in the closed state, and the hook portion and the locking block can be reliably disengaged and released when necessary, thereby improving the safety and stability of the mold operation;

[0029] 3. The mold opening mechanism used in the injection mold of the present application can achieve the purpose of simply controlling the mold opening sequence of the injection mold, making the mold opening process of the injection mold smoother; and it directly acts on the injection mold through driving, and does not directly act on the product, thereby ensuring the appearance of the product. When the present application is used in actual production, it can improve the mold opening efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the mold opening mechanism in the embodiment of the present application.

[0031] Figure 2 It is a cross-sectional view for showing the hook portion and the locking block.

[0032] Figure 3 It is a cross-sectional view used to show the stop bevel and the mating bevel.

[0033] Figure 4 It is a structural diagram used to show the mounting holes.

[0034] Figure 5 It is a structural schematic diagram of the injection mold in the embodiment of the present application.

[0035] Figure 6 It is a diagram used to show the positional relationship between the injection mold and the mold opening mechanism.

[0036] Explanation of the reference numerals: 1. mold opening mechanism; 2. movable pull rod; 21. hook portion; 211. reset slope; 3. elastic locking member; 31. locking seat; 311. locking groove; 32. locking block; 321. matching slope; 33. spring; 4. fixed pull rod; 41. stop slope; 42. slide groove; 5. mounting hole; 6. injection mold; 61. movable plate; 62. cavity plate; 63. fixed plate. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-6 This application is described in further detail.

[0038] Please refer to Figure 1-4 As shown, the embodiment of the present application discloses a mold opening mechanism, which is used for mold opening. The mold opening mechanism 1 includes a movable pull rod 2, an elastic locking member 3 and a fixed pull rod 4. In this embodiment, the fixed pull rod 4 and the movable pull rod 2 are both vertically arranged, and the elastic locking member 3 is horizontally arranged. The movable pull rod 2 slides in the fixed pull rod 4. The movable pull rod 2 and the elastic locking member 3 are used in conjunction with each other. A slide groove 42 is provided in the fixed pull rod 4. The movable pull rod 2 slides in the slide groove 42 and contacts the inner wall of the slide groove 42. The arrangement of the slide groove 42 helps to achieve the coordinated movement and constraint relationship between the fixed pull rod 4 and the movable pull rod 2, which can increase the stability and reliability of the mold opening mechanism 1, and also can improve its service life and operating efficiency.

[0039] When the mold is closed, the elastic locking member 3 is engaged with the movable rod 2. When the mold is opened, the movable rod 2 drives the elastic locking member 3 to move. When the elastic locking member 3 moves to contact with the fixed rod 4, the elastic locking member 3 retracts and disengages from the movable rod 2. In this embodiment, the movable rod 2 moves in the vertical direction, that is, along Figure 1 The elastic locking member 3 moves in the horizontal direction, that is, the elastic locking member 3 moves in the vertical direction. Figure 1 The middle direction b moves left and right, and the moving direction of the movable pull rod 2 is perpendicular to the moving direction of the elastic locking member 3;

[0040] When the mold needs to be opened, the movable pull rod 2 is driven to slide in the fixed pull rod 4. At this time, due to the clamping fit between the elastic locking piece 3 and the movable pull rod 2, the movable pull rod 2 will drive the elastic locking piece 3 to move, thereby realizing the one-time opening of the mold. When the elastic locking piece 3 moves to conflict with the fixed pull rod 4, the elastic locking piece 3 retracts and disengages from the movable pull rod 2. At this time, the movable pull rod 2 continues to move, thereby realizing the secondary opening of the mold and completing the opening of the entire mold. The mold opening mechanism 1 of the present application has a simple structural design and can achieve the effect of simply controlling the mold opening sequence, making the mold opening process smoother. In addition, the drive of the mold opening mechanism 1 of the present application directly acts on the mold, and does not directly act on the product, thereby ensuring the appearance of the product. When the present application is used in actual production, it can improve the mold opening efficiency and product quality.

[0041] The elastic locking member 3 includes a locking seat 31, a locking block 32 and a spring 33 arranged in the locking seat 31. In the present embodiment, the locking seat 31, the spring 33 and the locking block 32 are all arranged horizontally, and the locking block 32 and the spring 33 move in the horizontal direction. The locking seat 31 is provided with a locking groove 311, and the spring 33 and the locking block 32 are arranged in the locking groove 311. The locking block 32 slides in the locking groove 311 and contacts the inner wall of the locking groove 311; thereby, the locking block 32 can be ensured to remain stable during the movement, and the locking and releasing operations of the elastic locking member 3 can be effectively realized;

[0042] The movable pull rod 2 is provided with a hook portion 21, and the locking block 32 extends out of the locking seat 31 and engages with the hook portion 21; Figure 2 , the length of the locking block 32 extending out of the locking seat 31 is set to A, the width of the contact surface when the hook portion 21 abuts against the locking block 32 is set to B, and the range of B / A is 1 / 2-1. In this embodiment, preferably, the range of B / A is 1 / 2-3 / 4; by limiting the ratio range of the width of the contact surface when the hook portion 21 and the locking block 32 abut against each other and the length of the locking block 32 extending out, it is possible to ensure that the hook portion 21 and the locking block 32 are firmly locked in the closed state, and the hook portion 21 and the locking block 32 can be reliably disengaged and released when necessary, thereby improving the safety and stability of the mold operation;

[0043] Through the design of the locking seat 31, the locking block 32, the spring 33 and the hook portion 21, elastic locking can be achieved when the mold is closed, and the mold is kept in a closed state by the snap-fitting cooperation between the locking block 32 and the hook portion 21; when the mold needs to be opened, the movement of the movable pull rod 2 will cause the locking block 32 to disengage from the hook portion 21, so that the elastic locking piece 3 retracts and disengages from the movable pull rod 2 under the action of the spring 33, thereby completing the mold opening operation. This design can provide a stable locking and reliable release function during the mold operation, thereby achieving the purpose of simply controlling the mold opening sequence.

[0044] A stop bevel 41 is provided on the fixed pull rod 4, and a matching bevel 321 is provided on the locking block 32, and the stop bevel 41 abuts against the matching bevel 321; during operation, when the stop bevel 41 abuts against the matching bevel 321, at this time, the matching bevel 321 on the locking block 32 is squeezed by the stop bevel 41 on the fixed pull rod 4, and the locking block 32 and the spring 33 are subjected to the pressure applied by the fixed pull rod 4, so that the locking block 32 retracts into the locking groove 311 and disengages from the hook portion 21, thereby disengaging the locking block 32 from the hook portion 21, thereby achieving the purpose of sequential demolding.

[0045] The hook portion 21 is provided with a reset bevel 211, and the reset bevel 211 is in abutment with the mating bevel 321. In the present embodiment, the stop bevel 41, the mating bevel 321 and the reset bevel 211 include but are not limited to an acute angle of 30°-70° with the horizontal direction; during operation, when the reset bevel 211 is in abutment with the mating bevel 321, the mating bevel 321 on the locking block 32 is squeezed by the reset bevel 211 on the movable pull rod 2, and the movable pull rod 2 applies pressure to the locking block 32 and the spring 33, causing the locking block 32 to retract, so that the movable pull rod 2 can continue to move. At this time, when the squeezing on the locking block 32 is released, the spring 33 pushes the locking block 32 to move toward the side of the movable pull rod 2, and makes the locking block 32 engage with the hook portion 21 of the movable pull rod 2 again, thereby realizing the reset operation of the movable pull rod 2, thereby ensuring that the mold opening mechanism 1 can quickly return to its initial state after the demolding is completed, thereby improving the efficiency and reliability of the overall operation.

[0046] A plurality of mounting holes 5 are provided on the movable pull rod 2, the fixed pull rod 4 and the locking seat 31. In the present embodiment, a through hole is also provided on the fixed pull rod 4, and the through hole is connected to the mounting hole 5 on the movable pull rod 2 in a one-to-one correspondence. The through hole is provided for the staff to install bolts on the mounting hole 5 of the movable pull rod 2 through the fixed pull rod 4. The provision of the mounting hole 5 can facilitate the assembly of the movable pull rod 2, the fixed pull rod 4 and the locking seat 31 with other components or structures, so as to form a complete mechanical system or device, which can improve the assembly efficiency and also help to ensure a firm connection between the components.

[0047] Please refer to Figure 5-6 As shown, the present application also provides an injection mold, including the mold opening mechanism 1 as described above (the specific structure of the mold opening mechanism 1 is shown in FIG. Figure 1-4 As shown), the injection mold 6 of the present application uses the above-mentioned mold opening mechanism 1 to achieve the purpose of simply controlling the mold opening sequence of the injection mold 6. In this embodiment, the injection mold 6 is provided with four symmetrically arranged mold opening mechanisms 1;

[0048] The injection mold 6 includes a movable plate 61, a cavity plate 62 and a fixed plate 63, the cavity plate 62 is arranged between the movable plate 61 and the fixed plate 63, in the present embodiment, the movable plate 61, the cavity plate 62 and the fixed plate 63 are jointly provided with an inner cavity consistent with the shape of the product; the mold opening mechanism 1 is arranged on the outer wall of the injection mold 6, specifically, the fixed pull rod 4 is arranged on the fixed plate 63, the movable pull rod 2 is arranged on the movable plate 61 and slides in the fixed pull rod 4, the elastic locking member 3 is arranged on the cavity plate 62 and abuts against the movable pull rod 2, in the present embodiment, the fixed pull rod 4 and the fixed plate 63, the movable pull rod 2 and the movable plate 61, and the locking seat 31 of the elastic locking member 3 and the cavity plate 62 are all connected and fixed by bolts, the bolts pass through the mounting holes 5 on the mold opening mechanism 1 and are then connected and fixed to the injection mold 6, in the present embodiment, the spring 33 of the elastic locking member 3 is fixed to the cavity plate 62 of the injection mold 6 at one end away from the locking block 32;

[0049] The injection mold 6 is also provided with a driving member. In this embodiment, the driving member drives the movable plate 61 to move up and down in the vertical direction. The driving member passes through the fixed plate 63 and the cavity plate 62 and is then fixed to the movable plate 61. The driving member can realize the movement control of the movable plate 61 and the control of the mold opening mechanism 1, thereby realizing the control of the opening and closing action of the injection mold 6, ensuring that the injection mold 6 and the mold opening mechanism 1 can move according to the predetermined path and speed when the mold is opened. The setting of the driving member helps to improve the automation degree and production efficiency of the mold, thereby improving the stability and consistency of production.

[0050] During operation, the driving member drives the movable plate 61 to move, thereby driving the movable pull rod 2 set thereon to slide and move in the fixed pull rod 4. At this time, since the locking block 32 of the elastic locking member 3 is engaged with the hook portion 21 of the movable pull rod 2, the hook portion 21 will drive the locking block 32 to move, thereby driving the cavity plate 62 to move together, so that the cavity plate 62 is separated from the fixed plate 63, and the injection mold 6 is opened once; when the locking block 32 of the elastic locking member 3 moves to contact the fixed pull rod 4, at this time, the matching inclined surface 321 on the locking block 32 is squeezed by the stop inclined surface 41 on the fixed pull rod 4, and the locking block 32 retracts and disengages from the movable pull rod 2. At this time, the driving member drives the movable plate 61 to continue to move, so as to separate the movable plate 61 from the cavity plate 62, thereby realizing the secondary opening of the mold and completing the opening of the entire mold.

[0051] The implementation principle of the embodiment of the present application is as follows: the mold opening mechanism 1 of the present application has a simple structure design, which can achieve the effect of simply controlling the mold opening sequence, making the mold opening process of the injection mold 6 smoother; and the drive of the mold opening mechanism 1 of the present application directly acts on the injection mold 6, and does not directly act on the product, so as to ensure the appearance of the product;

[0052] Before working, first install the mold opening mechanism 1 on the injection mold 6. Specifically, the locking seat 31 and the cavity plate 62 are fixed by bolts, the spring 33 is fixed on the cavity plate 62, and then the fixed rod 4 and the fixed plate 63 are fixed by bolts. Finally, the movable rod 2 is inserted along the slide groove 42 of the fixed rod 4, and then the movable rod 2 and the movable plate 61 are fixed by bolts through the through hole on the fixed rod 4 to complete the installation of the mold opening mechanism 1.

[0053] During operation, the driving member drives the movable plate 61 to move upward, thereby driving the movable pull rod 2 arranged thereon to slide upward in the fixed pull rod 4. At this time, since the locking block 32 of the elastic locking member 3 is engaged with the hook portion 21 of the movable pull rod 2, the hook portion 21 will drive the locking block 32 to move, thereby driving the cavity plate 62 to move together, so that the cavity plate 62 is separated from the fixed plate 63, and the injection mold 6 is opened once; when the locking block 32 of the elastic locking member 3 moves to contact with the fixed pull rod 4, at this time, the matching inclined surface 321 on the locking block 32 is squeezed by the stop inclined surface 41 on the fixed pull rod 4, and the locking block 32 retracts and disengages from the movable pull rod 2. At this time, the driving member drives the movable plate 61 to continue to move, so as to separate the movable plate 61 from the cavity plate 62, thereby realizing the secondary opening of the mold and completing the opening of the entire mold;

[0054] After the mold opening needs to be completed, the mold needs to be assembled to the original closed state. At this time, the driving member drives the movable plate 61 to move downward and drives the movable pull rod 2 to move together. When the reset bevel 211 on the movable pull rod 2 encounters the matching bevel 321 on the locking block 32, the reset bevel 211 will squeeze the matching bevel 321, the locking block 32 retracts and the spring 33 is compressed and accumulates force, so that the movable pull rod 2 can continue to move. When the extrusion on the locking block 32 is released, the spring 33 will push the locking block 32 to pop out, and the locking block 32 will be engaged with the hook portion 21 of the movable pull rod 2. At this time, the movable plate 61 and the cavity plate 62 are closed, and the driving member continues to drive the movable plate 61 to move. At this time, the movable pull rod 2 will hold the locking block 32 and move together, that is, the movable plate 61 will drive the cavity plate 62 to move together, thereby realizing the closure of the cavity plate 62 and the fixed plate 63, and completing the reset work of the injection mold 6.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mold opening mechanism, used for mold opening, characterized in that: It comprises a movable pull rod (2), an elastic locking piece (3) and a fixed pull rod (4); the movable pull rod (2) slides inside the fixed pull rod (4), and the movable pull rod (2) and the elastic locking piece (3) are used in conjunction with each other; when the mold is closed, the elastic locking piece (3) and the movable pull rod (2) are engaged with each other; when the mold is opened, the movable pull rod (2) drives the elastic locking piece (3) to move; when the elastic locking piece (3) moves to contact with the fixed pull rod (4), the elastic locking piece (3) retracts and disengages from the movable pull rod (2).

2. The mold opening mechanism according to claim 1, characterized in that: The elastic locking member (3) comprises a locking seat (31) and a locking block (32) and a spring (33) arranged in the locking seat (31); a hook portion (21) is provided on the movable pull rod (2), and the locking block (32) extends out of the locking seat (31) and is engaged with the hook portion (21).

3. The mold opening mechanism according to claim 2, characterized in that: The length of the locking block (32) extending from the locking seat (31) is set to A, the width of the contact surface when the hook portion (21) abuts against the locking block (32) is set to B, and the range of B / A is 1 / 2-1.

4. The mold opening mechanism according to claim 2, characterized in that: The fixed pull rod (4) is provided with a stop bevel (41), and the locking block (32) is provided with a matching bevel (321); after the matching bevel (321) abuts against the stop bevel (41), the fixed pull rod (4) exerts pressure on the locking block (32) and the spring (33) so that the locking block (32) retracts and disengages from the hook portion (21).

5. The mold opening mechanism according to claim 2, characterized in that: The hook portion (21) is provided with a reset inclined surface (211), and after the matching inclined surface (321) abuts against the reset inclined surface (211), the movable pull rod (2) exerts pressure on the locking block (32) and the spring (33) so that the locking block (32) retracts, thereby achieving the reset of the movable pull rod (2).

6. The mold opening mechanism according to claim 2, characterized in that: The locking seat (31) is provided with a locking groove (311), the spring (33) and the locking block (32) are arranged in the locking groove (311), and the locking block (32) slides in the locking groove (311) and contacts the inner wall of the locking groove (311).

7. The mold opening mechanism according to claim 2, characterized in that: The movable pull rod (2), the fixed pull rod (4) and the locking seat (31) are provided with mounting holes (5).

8. The mold opening mechanism according to claim 1, characterized in that: A sliding groove (42) is provided in the fixed pull rod (4), and the movable pull rod (2) slides in the sliding groove (42) and contacts the inner wall of the sliding groove (42).

9. An injection mold, comprising the mold opening mechanism according to any one of claims 1 to 8, characterized in that: The injection mold includes a movable plate (61), a cavity plate (62) and a fixed plate (63); the cavity plate (62) is arranged between the movable plate (61) and the fixed plate (63); the fixed pull rod (4) is arranged on the fixed plate (63); the movable pull rod (2) is arranged on the movable plate (61) and slides inside the fixed pull rod (4); the elastic locking member (3) is arranged on the cavity plate (62) and is engaged with the movable pull rod (2).

10. The injection mold according to claim 9, characterized in that: The injection mold is provided with a driving member, and the driving member drives the movable plate (61) to move.

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