Mold opening mechanism and injection mold

Abstract

The invention relates to the technical field of injection molds, and particularly discloses a mold opening mechanism and an injection mold, the mold opening mechanism comprises a mold plate and a mold body mounted on the mold plate, a mold core used for injection molding of a workpiece is mounted in the mold body, an insert is slidably connected to the mold body, and an inverted buckle matched with the insert is formed on the workpiece in an injection molding mode. A notch matched with the insert is formed in the insert; the separation mechanism is arranged on the mold body, in the mold opening stroke of the mold body, the insert is driven to slide towards the side away from the workpiece after being separated from the inverted buckle on the workpiece so as to be separated from the workpiece, staged separation of the insert and the workpiece is achieved through the separation mechanism, and the interference problem during demolding of a complex inverted buckle structure is effectively avoided; the workpiece deformation or damage risk is reduced; the sliding stability of the insert is enhanced through the design of the dovetail groove linkage piece and the trapezoidal buffer groove, the hard alloy check block and the reset spring guarantee that the mechanism is reset accurately, and the service life of the mold is prolonged.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an opening mechanism and an injection mold. Background Technology

[0002] In the automotive manufacturing industry, the water tank is a key component of the vehicle's cooling system, and the efficiency and reliability of its production are of paramount importance.

[0003] The car radiator, also known as a water tank, is a major component of the car's cooling system. It absorbs heat from the cylinder block and prevents the engine from overheating. Because water has a high specific heat capacity, its temperature does not rise much after absorbing heat from the cylinder block. Therefore, the engine's heat is dissipated through the coolant in the liquid circuit, using water as a heat carrier for heat conduction, and then through large-area heat sinks for heat dissipation via convection, in order to maintain the engine's appropriate operating temperature. Most modern car radiators are injection molded.

[0004] In the prior art, such as the Chinese patent with authorization announcement number CN220763371U entitled "Large, Complex, and Precision Automotive Radiator Bracket Injection Mold," a large, complex, and precision automotive radiator bracket injection mold is disclosed. This invention includes a lower mold and an upper mold for forming the automotive radiator bracket, with the upper mold containing a forming upper part. In the aforementioned patent, during the injection molding process, the lower and upper molds are brought close together, with the upper and lower parts abutting against each other to form a complete cavity. Molten material is injected through an injection manifold and then diverted into the cavity. A synchronous forming component for the bracket holes and grooves is used to simultaneously injection mold the holes and grooves of the automotive radiator bracket, eliminating the need for secondary drilling and grooving, shortening the product molding cycle, resulting in high overall quality of the plastic part and improved product yield. After injection molding, cooling water is introduced into the upper and lower mold cooling components to simultaneously cool the upper and lower parts of the plastic part.

[0005] For example, Chinese patent CN219466814U, entitled "A Rapid Heat Dissipation Automotive Injection Mold," discloses a rapid heat dissipation automotive injection mold, including a base plate and a water tank located below the bottom of the base plate. The base plate includes: a fixing block located at the middle of the top of the base plate, with a heat dissipation pipe at the bottom end inside the fixing block; a molding groove located at the middle of the inside of the fixing block; a top plate located at the top of the fixing block; and a molding block located at the middle of the bottom of the top plate. Semiconductor coolers are located on both sides of the top of the water tank. In this patent, a low temperature is generated at the bottom of the semiconductor cooler, and the temperature is introduced into the tap water through a cooling plate. A motor drives a rotating shaft to rotate, and a retaining groove makes the rotation of the shaft more stable.

[0006] Traditional injection mold opening mechanisms, such as those mentioned in the patent, involve a relatively simple slider movement during the mold opening process. Typically, the slider only drives the insert to separate from the workpiece during the opening stroke. While this design can achieve demolding to some extent, it presents several problems in complex automotive radiator molds. For example, when the radiator structure is complex, especially with numerous side-pulling core structures, the single slider stroke often cannot completely prevent interference between the insert and the workpiece, leading to demolding difficulties and potentially damaging the workpiece. Furthermore, if the slider cannot adjust its position promptly after the insert separates from the workpiece during mold opening, it may adversely affect subsequent demolding operations, such as hindering the normal operation of the ejection mechanism or causing deformation or damage to the workpiece during demolding, indicating certain shortcomings. Summary of the Invention

[0007] The purpose of this invention is to provide a mold opening mechanism and an injection mold to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a mold opening mechanism, comprising a template and a mold body mounted on the template, wherein a mold core for injection molding a workpiece is installed inside the mold body, an insert is slidably connected to the mold body, and an undercut adapted to the insert is injection molded on the workpiece, the insert having a matching notch; and a release mechanism is provided on the mold body, which, during the mold opening stroke, causes the insert to slide away from the workpiece after separating from the undercut on the workpiece, thereby releasing the insert from the workpiece.

[0009] Furthermore, the disengagement mechanism includes a contact block slidably connected to the mold body, and the contact block and the insert are connected by a linkage mechanism.

[0010] Furthermore, a limiting plate is installed on the mold body, and a pressure block is slidably connected to the limiting plate, and a contact block is installed on the pressure block.

[0011] Furthermore, the mold body is provided with an inclined guide post, and the pressure block is provided with a wedge-shaped groove adapted to the inclined guide post, and the inclined guide post and the wedge-shaped groove are slidably connected.

[0012] Furthermore, a first elastic reset component is provided between the pressure block and the mold body; the first elastic reset component includes a slide rod fixedly connected to the pressure block, and the slide rod is slidably connected to the mold body. A cap is also fixedly connected to the slide rod, and a reset spring is provided between the cap and the mold body. The elastic force of the reset spring drives the pressure block away from the workpiece.

[0013] Furthermore, the insert is mounted on the pressure block via an intermittent connector.

[0014] Furthermore, the intermittent connector includes an extension block mounted on the insert, a blocking block fixedly connected to the extension block, and a trapezoidal buffer groove provided on the pressure block, with the blocking block intermittently abutting against the trapezoidal buffer groove; when the pressure block slides, the extension block drives the blocking block to slide in the trapezoidal buffer groove until the blocking block abuts against the trapezoidal buffer groove.

[0015] Furthermore, a second elastic reset member is provided between the extension block and the pressure block, and the structure of the second elastic reset member is consistent with the structure of the first reset member.

[0016] Furthermore, the linkage includes a dovetail strip fixedly connected to the insert, and the contact block has a dovetail groove adapted to the dovetail strip, and the dovetail strip is slidably connected to the dovetail groove.

[0017] Furthermore, the insert has a notch that matches the undercut on the workpiece.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the mold opening mechanism and injection mold achieve phased separation of the insert and the workpiece through the disengagement mechanism, effectively avoiding interference problems during demolding of complex undercut structures and reducing the risk of workpiece deformation or damage; the dovetail groove linkage and trapezoidal buffer groove design enhance the smoothness of insert sliding, while the hard alloy stop and return spring ensure accurate mechanism reset and extend mold service life; the synergistic effect of the inclined guide post and elastic reset component, combined with the limit plate and intermittent connector, ensures precise and controllable movement trajectory of the insert, improving demolding stability and repeatability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the mold core installation position structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the hidden state structure of the mold body provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the hidden state structure of the mold core provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the mounting position structure of the first elastic reset member provided in an embodiment of the present invention; Figure 6This is a schematic diagram of the mounting position structure of the second elastic reset member provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection structure between the contact block and the slider provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the workpiece structure provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the linkage component in an exploded state, provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Template; 2. Mold body; 3. Mold core; 4. Workpiece; 41. Undercut; 5. Contact block; 6. Insert; 61. Notch; 7. Pressure block; 8. Limiting plate; 9. Inclined guide post; 10. First elastic reset component; 11. Extension block; 12. Trapezoidal buffer groove; 13. Blocking block; 14. Second elastic reset component; 15. Linkage component; 151. Dovetail groove; 152. Dovetail strip. Detailed Implementation

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please see Figures 1-9 The present invention provides a technical solution: a mold opening mechanism, including a template 1 and a mold body 2 installed on the template 1. A mold core 3 for injection molding a workpiece 4 is installed inside the mold body 2. An insert 6 is slidably connected to the mold body 2, and an undercut 41 adapted to the insert 6 is injection molded on the workpiece 4. The insert 6 has a notch 61 adapted to the insert. The mold body 2 is provided with a release mechanism. When the mold body 2 is in the mold opening stroke, the insert 6 is driven to slide away from the workpiece 4 after the undercut 41 on the workpiece 4 is separated, so as to release the insert 6 from the workpiece 4.

[0024] Specifically, the mold opening mechanism and injection mold include a template 1 and a mold body 2 mounted on the template 1. Inside the mold body 2 is a mold core 3 for injection molding a workpiece 4. An insert 6 is slidably connected to the mold body 2, and an undercut 41 adapted to the insert 6 is injection molded onto the workpiece 4. The insert 6 has a matching notch 61. A release mechanism is provided on the mold body 2. During mold opening, the release mechanism operates in two stages: In the first stage, the insert 6 moves along the mold opening direction, completely separating the notch 61 from the undercut 41; in the second stage, the release mechanism drives the insert 6 to slide laterally, completely disengaging it from the interference area of ​​the workpiece 4. The release mechanism achieves staged movement through the coordinated action of the inclined guide post 9 and the elastic reset member, ensuring that the workpiece 4 is not deformed or damaged during demolding.

[0025] In the embodiments provided by the present invention, the disengagement mechanism includes a contact block 5 slidably connected to the mold body 2. The contact block 5 and the insert 6 are connected by a linkage 15 to provide power for the sliding of the insert 6.

[0026] In the embodiment provided by the present invention, a limiting plate 8 is installed on the mold body 2, and a pressure block 7 is slidably connected to the limiting plate 8, and a contact block 5 is installed on the pressure block 7. The limiting plate 8 is fixed to the reference surface of the mold body 2 by six M8 hexagon socket screws. During the movement, the carbide stop on the limiting plate 8 can precisely control the sliding of the pressure block 7.

[0027] In the embodiments provided by the present invention, the mold body 2 is provided with an inclined guide post 9, and the pressure block 7 is provided with a wedge-shaped groove adapted to the inclined guide post 9. The inclined guide post 9 and the wedge-shaped groove are slidably connected. When the mold is opened, the relative movement between the inclined guide post 9 and the wedge-shaped groove generates a lateral force, which provides power for the sliding of the pressure block 7.

[0028] In the embodiments provided by the present invention, a first elastic reset member 10 is provided between the pressure block 7 and the mold body 2; the first elastic reset member 10 includes a slide rod fixedly connected to the pressure block 7, and the slide rod is slidably connected to the mold body 2. A cap is also fixedly connected to the slide rod, and a reset spring is provided between the cap and the mold body 2. The elastic force of the reset spring drives the pressure block 7 away from the workpiece 4. The elastic force of the reset spring drives the pressure block 7 to reset, ensuring that the insert 6 can return to its initial position after the mold is opened.

[0029] In the embodiments provided by the present invention, the insert 6 and the pressure block 7 are mounted on the pressure block 7 via an intermittent connector. The intermittent connector includes an extension block 11 mounted on the insert 6, a blocking block 13 fixedly connected to the extension block 11, and a trapezoidal buffer groove 12 formed on the pressure block 7. The blocking block 13 intermittently abuts against the trapezoidal buffer groove 12. When the pressure block 7 slides, the extension block 11 drives the blocking block 13 to slide within the trapezoidal buffer groove 12 until the blocking block 13 abuts against the trapezoidal buffer groove 12. More specifically, the insert 6 and the pressure block 7 are connected via the intermittent connector. The intermittent connector allows the insert 6 to move along the mold opening direction at the initial stage of mold opening, and then slide laterally under the pressure block 7 after the undercut 41 separates.

[0030] In the embodiments provided by the present invention, a second elastic reset member 14 is provided between the extension block 11 and the pressure block 7. The structure of the second elastic reset member 14 is consistent with that of the first reset member. The second elastic reset member 14 is used to reset the insert 6 after it slides laterally, ensuring that the insert 6 can be accurately returned to its position during the next mold closing.

[0031] In the embodiments provided by the present invention, the linkage 15 includes a dovetail strip 152 fixedly connected to the insert 6, and a dovetail groove 151 adapted to the dovetail strip 152 is provided on the contact block 5. The dovetail strip 152 and the dovetail groove 151 are slidably connected. The linkage 15 includes a dovetail strip 152 fixed to the insert 6 and a dovetail groove 151 provided on the contact block 5. The slidable connection between the dovetail strip 152 and the dovetail groove 151 ensures that the insert 6 moves smoothly and without deviation during sliding.

[0032] The present invention also provides an injection mold including the above-mentioned mold opening mechanism, which is suitable for injection molding of workpieces 4 with complex undercut 41 structures, and is especially suitable for the production of precision parts such as automotive water tanks.

[0033] It should be noted that all electrical equipment involved in this application can be powered by batteries or external power sources, and this application is equipped with a control system for controlling the operation of the entire equipment.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mold opening mechanism, comprising a template (1) and a mold body (2) mounted on the template (1), wherein a mold core (3) for injection molding a workpiece (4) is installed inside the mold body (2), characterized in that: The mold body (2) is slidably connected with an insert (6), and the workpiece (4) is injection molded with an undercut (41) that matches the insert (6). The insert (6) has a notch (61) that matches the undercut (41). Furthermore, the mold body (2) is equipped with a release mechanism; During the mold body (2) opening stroke, after the insert (6) separates from the undercut (41) on the workpiece (4), the insert (6) is driven to slide away from the workpiece (4) to detach from the workpiece (4).

2. The mold opening mechanism according to claim 1, characterized in that: The disengagement mechanism includes a contact block (5) that is slidably connected to the mold body (2), and the contact block (5) is connected to the insert (6) by a linkage (15).

3. The mold opening mechanism according to claim 2, characterized in that: A limiting plate (8) is installed on the mold body (2), and a pressure block (7) is slidably connected on the limiting plate (8), and a contact block (5) is installed on the pressure block (7).

4. The mold opening mechanism according to claim 3, characterized in that: The mold body (2) is provided with an inclined guide post (9), and the pressure block (7) is provided with a wedge-shaped groove that is compatible with the inclined guide post (9). The inclined guide post (9) and the wedge-shaped groove are slidably connected.

5. The mold opening mechanism according to claim 3, characterized in that: A first elastic reset member (10) is provided between the pressure block (7) and the mold body (2). The first elastic reset member (10) includes a slide rod fixedly connected to the pressure block (7), and the slide rod is slidably connected to the mold body (2). A cap is also fixedly connected to the slide rod, and a reset spring is provided between the cap and the mold body (2). The elastic force of the reset spring drives the pressure block (7) away from the workpiece (4).

6. The mold opening mechanism according to claim 3, characterized in that: The insert (6) is mounted on the pressure block (7) via an intermittent connector.

7. The mold opening mechanism according to claim 6, characterized in that: The intermittent connector includes an extension block (11) mounted on the insert (6), a blocking block (13) is fixedly connected to the extension block (11), and a trapezoidal buffer groove (12) is provided on the pressure block (7), with the blocking block (13) and the trapezoidal buffer groove (12) intermittently abutting; When the pressure block (7) slides, the extension block (11) drives the blocking block (13) to slide in the trapezoidal buffer groove (12) until the blocking block (13) abuts against the trapezoidal buffer groove (12).

8. The mold opening mechanism according to claim 7, characterized in that: A second elastic reset member (14) is provided between the extension block (11) and the pressure block (7), and the structure of the second elastic reset member (14) is the same as that of the first reset member.

9. The mold opening mechanism according to claim 2, characterized in that: The linkage component (15) includes a dovetail strip (152) fixedly connected to the insert (6), and a dovetail groove (151) adapted to the dovetail strip (152) is provided on the contact block (5). The dovetail strip (152) and the dovetail groove (151) are slidably connected.

10. An injection mold, characterized in that: Includes the mold opening mechanism described in any one of claims 1-9.

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