Injection mold with self-locking function and using method thereof

Abstract

The invention discloses an injection mold with a self-locking function and a use method of the injection mold, and relates to the technical field of injection molds. The mold main body is mounted on the bottom plate; the locking device is mounted on the mold main body, and the locking device is used for locking the mold main body; and the pressing unlocking device is installed on the bottom plate, and the pressing unlocking device is used for unlocking the locking device. According to the injection mold, the arrangement mode that the locking device is matched with the pressing unlocking device is utilized, and the elastic clamping mechanism is clamped with the insertion rod, so that the relative position between the insertion rod and the clamping seat is conveniently locked, the relative position between the lower mold and the upper mold is locked, and the injection molding process is more stable; self-locking is achieved through clamping matching of the insertion rod and the elastic clamping mechanism, a bolt fastening mode depended on by a traditional injection mold is replaced, and the problems of thread abrasion and thread slipping caused by long-term repeated screwing and disassembling of a bolt are solved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold with a self-locking function and its method of use. Background Technology

[0002] In the field of injection molding, injection molds are core equipment, and their structural stability directly determines the dimensional accuracy, surface quality, and production efficiency of injection molded products. Existing injection molds typically consist of a base plate, a lower mold, an upper mold, a drive mechanism, and positioning components. After the upper and lower molds are closed by the drive mechanism, the positioning components keep the mold closed to withstand the high-pressure impact force generated by the molten material during the injection process.

[0003] In existing injection molds, bolt fastening is the most widely used mold closing and locking method. It uses bolt assemblies that pass through the upper mold, lower mold, and base plate, and tightens them with nuts to lock and fix the mold after it is closed, so as to resist the high pressure impact force generated by the molten material during injection and maintain the structural stability of the mold after it is closed. However, the repeated tightening and loosening of bolts over a long period of time can easily lead to problems such as thread wear and stripping, which shortens the service life of the locking structure and increases the maintenance cost and downtime of the mold. Moreover, the unlocking and demolding operations of existing molds are mostly separate designs. The locking must first be released manually or by an independent drive structure before the demolding mechanism is activated to complete the ejection of the product. The operation process is cumbersome, which not only extends the production cycle, but also increases the operational errors caused by manual intervention, which is not conducive to the efficient operation of automated production lines. Summary of the Invention

[0004] The purpose of this invention is to provide an injection mold with a self-locking function and a method for using it, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an injection mold with a self-locking function, comprising:

[0006] Base plate;

[0007] The mold body is mounted on the base plate;

[0008] A locking device is mounted on the mold body and is used to lock the mold body.

[0009] The press-to-unlock device is mounted on the base plate and is used to unlock the locking device.

[0010] Preferably, the mold body includes:

[0011] The lower mold is mounted on the base plate;

[0012] Upper mold, which cooperates with the lower mold;

[0013] A hydraulic cylinder, the output end of which is connected to the upper mold drive.

[0014] Preferably, the locking device includes:

[0015] Connecting block, which is fixedly connected to the upper mold;

[0016] A plug rod, one end of which is fixedly connected to a connecting block;

[0017] A card holder is fixedly installed on the side of the lower mold, and the insertion rod is slidably inserted into the card holder;

[0018] The elastic snap-fit ​​mechanism has a first cavity inside the card holder, and the elastic snap-fit ​​mechanism is installed inside the first cavity.

[0019] Preferably, the elastic snap-fit ​​mechanism includes:

[0020] A first sliding plate is slidably disposed inside a first cavity;

[0021] A one-way locking block is fixedly installed on the first sliding plate. The one-way locking block is slidably inserted into the locking seat. The insertion rod has a locking groove that cooperates with the one-way locking block.

[0022] A first elastic support member is installed inside the first cavity and is used to provide elastic support for the first slide plate.

[0023] An adsorption element is installed inside the first cavity.

[0024] Preferably, the first elastic support member includes:

[0025] A first guide rod is fixedly installed inside the first cavity, and the first guide rod is slidably inserted into and connected to the first slide plate;

[0026] A first spring is movably sleeved on the outside of a first guide rod, and the first spring is used to provide elastic support for the first slide plate.

[0027] Preferably, the adsorption element comprises:

[0028] An electromagnet is fixedly installed inside the first cavity;

[0029] An iron block is fixedly installed on a first sliding plate, and the electromagnet is positioned opposite the iron block.

[0030] Preferably, the press-to-unlock device includes:

[0031] The fixing seat is fixedly installed on the base plate;

[0032] The pressing cylinder is slidably fitted with the fixed base;

[0033] A support frame is fixedly installed inside a fixed base. The support frame is slidably inserted into the bottom of a pressing cylinder. A third spring is sleeved on the outside of the support frame.

[0034] Pressing block, which is fixedly installed on the top of the support frame;

[0035] The first push switch is fixedly installed on the top of the inner cavity of the push cylinder and is electrically connected to the hydraulic cylinder.

[0036] The pressing and energizing mechanism has a second cavity on the side of the fixed base, and the pressing and energizing mechanism is installed inside the second cavity.

[0037] Preferably, the press-to-energize mechanism includes:

[0038] The second slide plate is slidably disposed inside the second cavity;

[0039] An extrusion block is fixedly installed on the second slide plate, and the extrusion block is slidably interlocked with the fixed base;

[0040] The second elastic support is installed inside the second cavity and is used to provide elastic support for the second slide plate.

[0041] The second push switch is fixedly installed inside the second cavity and is electrically connected to the electromagnet.

[0042] The extrusion head is fixedly mounted on the second slide plate, and the second press switch corresponds to the position of the extrusion head.

[0043] Preferably, the second elastic support member includes:

[0044] The second guide rod is fixedly installed inside the second cavity, and the second guide rod is slidably inserted into the second slide plate;

[0045] The second spring is movably sleeved on the outside of the second guide rod.

[0046] A method for using an injection mold with a self-locking function includes the following steps:

[0047] Step 1: The upper mold is driven to descend by the hydraulic cylinder, so that the insert rod goes down and passes through the card seat. This allows the insert rod to squeeze the one-way card block. After the one-way card block is squeezed into the first cavity, it is then supported by the elasticity of the first spring and slides towards the insert rod to engage with the inside of the card slot, thereby locking the relative position between the lower mold and the upper mold.

[0048] Step two: When the accommodation is completed, the pressing cylinder is pressed downwards, causing it to move downwards under the limit of the support frame. When the pressing cylinder moves downwards, it first presses the extrusion block, which in turn drives the second sliding plate to press the second spring. This causes the extrusion head to move towards the second pressing switch, pressing it and energizing the electromagnet to attract the iron block. The one-way block slides towards the electromagnet under its influence, disengaging from the inner cavity of the slot and unlocking the relative position between the insertion rod and the card seat. Then, the pressing cylinder is pressed further, causing the pressing block to press the first pressing switch, which energizes the hydraulic cylinder and drives the upper mold to move upwards, thus realizing the injection molding process.

[0049] The technical effects and advantages of this invention are as follows:

[0050] This invention utilizes a locking device combined with a press-to-unlock device. Through the engagement between the elastic locking mechanism and the insert rod, the relative position between the insert rod and the mounting base is easily locked, thus locking the relative position between the lower and upper molds. This makes the injection molding process more stable. The self-locking mechanism, achieved through the engagement of the insert rod and the elastic locking mechanism, replaces the bolt fastening method relied upon in traditional injection molds. This avoids problems such as thread wear and stripping caused by repeated tightening and loosening of bolts over a long period, improving the durability of the locking structure and extending the overall service life of the mold. A first-stage press on the press-to-unlock device energizes and unlocks the elastic locking mechanism. A second-stage press energizes the hydraulic cylinder, causing the upper mold to move upwards for demolding. This makes the mold more stable to use, eliminating the need for manual or separate unlocking of the locking mechanism and subsequent activation of the demolding mechanism, as required by traditional molds. This completely eliminates the cumbersome process of separate operation, reducing operational steps and complexity. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0052] Figure 1 This is a front view of the present invention.

[0053] Figure 2This is a schematic diagram of the internal structure of the locking device of the present invention;

[0054] Figure 3 This is a schematic diagram of the elastic snap-fit ​​mechanism of the present invention;

[0055] Figure 4 This is a schematic diagram of the internal structure of the press-to-unlock device of the present invention;

[0056] Figure 5 This is a schematic diagram of the structure of the pressing and energizing mechanism of the present invention.

[0057] In the attached image:

[0058] 100. Base plate; 200. Lower mold; 300. Upper mold; 400. Hydraulic cylinder; 500. Locking device; 501. Connecting block; 502. Insert rod; 503. Card seat; 504. Elastic locking mechanism; 541. First sliding plate; 542. One-way locking block; 543. First guide rod; 544. First spring; 545. Electromagnet; 546. Iron block; 600. Press unlocking device; 601. Fixed base; 602. Pressing cylinder; 603. Support frame; 604. Pressing block; 605. First press switch; 606. Press energizing mechanism; 661. Second sliding plate; 662. Extrusion block; 663. Second guide rod; 664. Second spring; 665. Second press switch; 666. Extrusion head. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] This invention provides, for example Figures 1-5The injection mold shown includes: a base plate 100; a mold body mounted on the base plate 100; a locking device 500 mounted on the mold body for locking the mold body; and a press-to-unlock device 600 mounted on the base plate 100 for unlocking the locking device 500. The locking mechanism 504 engages with the insert rod 502, facilitating the locking of the relative position between the insert rod 502 and the retainer 503. This locks the relative position between the lower mold 200 and the upper mold 300, making the injection process more stable. The self-locking mechanism replaces the bolt fastening method relied upon in traditional injection molds, avoiding problems such as thread wear and stripping caused by repeated tightening and loosening of bolts over a long period of time. This improves the durability of the locking structure and extends the overall service life of the mold. Then, a first-level press on the pressing and unlocking device 600 energizes and unlocks the elastic locking mechanism 504. A second-level press on the pressing and unlocking device 600 energizes the hydraulic cylinder 400, causing the upper mold 300 to move upward for demolding. This makes the mold more stable to use, eliminating the need for manual or independent unlocking of the locking mechanism and subsequent activation of the demolding mechanism, as required by traditional molds. This completely eliminates the cumbersome process of separate operation, reduces the number of steps, and lowers the complexity of operation.

[0061] The mold body includes: a lower mold 200, which is mounted on a base plate 100; an upper mold 300, which cooperates with the lower mold 200; and a hydraulic cylinder 400, the output end of which is connected to the upper mold 300 for transmission. The hydraulic cylinder 400 facilitates the lifting and lowering movement of the upper mold 300, thereby realizing the closing movement of the lower mold 200 and the upper mold 300.

[0062] The locking device 500 includes: a connecting block 501, which is fixedly connected to the upper mold 300; a rod 502, one end of which is fixedly connected to the connecting block 501; a retainer 503, which is fixedly installed on the side of the lower mold 200, and the rod 502 is slidably inserted into the retainer 503; and an elastic locking mechanism 504, in which a first cavity is provided inside the retainer 503, and the elastic locking mechanism 504 is installed inside the first cavity. Through the insertion between the rod 502 and the retainer 503, the elastic locking mechanism 504 limits the rod 502, thereby facilitating the locking of the relative position between the lower mold 200 and the upper mold 300.

[0063] Specifically, the elastic locking mechanism 504 includes: a first sliding plate 541, which is slidably disposed inside the first cavity; a one-way locking block 542, which is fixedly installed on the first sliding plate 541 and is slidably inserted into the locking seat 503, and the insertion rod 502 has a locking groove that cooperates with the one-way locking block 542; a first elastic support member, which is installed inside the first cavity and is used to elastically support the first sliding plate 541; and an adsorption member, which is installed inside the first cavity. The first elastic support includes: a first guide rod 543, which is fixedly installed inside the first cavity and slidably inserted into the first slide plate 541; and a first spring 544, which is movably sleeved on the outside of the first guide rod 543 and is used to elastically support the first slide plate 541. The elastic support of the first spring 544 facilitates the elastic reset of the one-way locking block 542. The adsorption component includes: an electromagnet 545, which is fixedly installed inside the first cavity; and an iron block 546, which is fixedly installed on the first sliding plate 541, with the electromagnet 545 and the iron block 546 positioned opposite each other. The one-way locking block 542 and the slot cooperate to limit the movement, facilitating the one-way locking of the insertion rod 502. The sliding interlocking between the first guide rod 543 and the first sliding plate 541 makes the linear sliding of the one-way locking block 542 more stable. The first spring 544 provides elastic support for the first sliding plate 541, making the cooperation between the one-way locking block 542 and the slot more stable. Through the principle of electromagnetism, the electromagnet 545 is energized to attract the iron block 546, thereby retracting the one-way locking block 542 into the first cavity to unlock the relative position between the insertion rod 502 and the card holder 503.

[0064] The press-to-unlock device 600 includes: a fixed base 601, which is fixedly installed on the base plate 100; a pressing cylinder 602, which is slidably engaged with the fixed base 601; a support frame 603, which is fixedly installed inside the fixed base 601 and is slidably inserted into the bottom of the pressing cylinder 602, with a third spring sleeved on the outside of the support frame 603; a pressing block 604, which is fixedly installed on the top of the support frame 603; and a first pressing switch 605. The first pressing switch 605 is fixedly installed on the top of the inner cavity of the pressing cylinder 602. The first pressing switch 605 is electrically connected to the hydraulic cylinder 400. The pressing energizing mechanism 606 has a second cavity on the side of the fixed base 601. The pressing energizing mechanism 606 is installed inside the second cavity. The pressing cylinder 602 facilitates the squeezing of the extrusion block 662, and the pressing block 604 facilitates the pressing of the first pressing switch 605. When the pressing cylinder 602 moves down, it will first squeeze the extrusion block 662 and then press the first pressing switch 605.

[0065] Specifically, the press-on energizing mechanism 606 includes: a second slide plate 661, which is slidably disposed inside the second cavity; a pressing block 662, which is fixedly installed on the second slide plate 661 and is slidably inserted into the fixing seat 601; a second elastic support member, which is installed inside the second cavity and is used to elastically support the second slide plate 661; a second press switch 665, which is fixedly installed inside the second cavity and is electrically connected to the electromagnet 545; and a pressing head 666, which is fixedly installed on the second slide plate 661 and the positions of the second press switch 665 and the pressing head 666 correspond to each other. The second elastic support includes: a second guide rod 663, which is fixedly installed inside the second cavity and slidably interlocked with the second slide plate 661; and a second spring 664, which is movably sleeved outside the second guide rod 663. Both the one-way locking block 542 and the pressing block 662 have inclined surfaces to facilitate the horizontal movement under the vertical compression of the external force through the force component. The pressing block 662 facilitates the horizontal movement of the pressing head 666, so that the pressing head 666 can press the second push switch 665. The second spring 664 facilitates the elastic support of the second slide plate 661.

[0066] A method for using an injection mold with a self-locking function includes the following steps:

[0067] Step 1: The hydraulic cylinder 400 drives the upper mold 300 to move downward, so that the insertion rod 502 passes through the card seat 503 downward, thereby allowing the insertion rod 502 to squeeze the one-way card block 542. After the one-way card block 542 is squeezed into the first cavity, it is then supported by the elasticity of the first spring 544, so that the one-way card block 542 slides towards the insertion rod 502 and engages with the inside of the card slot, thereby locking the relative position between the lower mold 200 and the upper mold 300.

[0068] Step two: When the accommodation is completed, the pressing cylinder 602 is pressed downwards, causing it to move downwards under the limit of the support frame 603. When the pressing cylinder 602 moves downwards, it first presses the extrusion block 662, causing the extrusion block 662 to drive the second sliding plate 661 to press the second spring 664, causing the extrusion head 666 to move towards the second pressing switch 665. This pressing causes the electromagnet 545 to be energized and generate magnetism, attracting the iron block 546. The one-way locking block 542 slides towards the electromagnet 545 under its drive, disengaging from the inner cavity of the slot, thus unlocking the relative position between the insertion rod 502 and the card seat 503. Then, the pressing cylinder 602 is pressed again, causing the pressing block 604 to further press the first pressing switch 605, energizing the hydraulic cylinder 400 and driving the upper mold 300 to move upwards, realizing the injection molding process.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold having a self-locking function and a method for using the same, characterized by, The utility model relates to a mould locking and unlocking device, which comprises: a base plate (100); a mould body mounted on the base plate (100); a locking device (500) mounted on the mould body, the locking device (500) being used for locking the mould body; a pressing unlocking device (600) mounted on the base plate (100), the pressing unlocking device (600) being used for unlocking the locking device (500).

2. The injection mold with self-locking function and its using method according to claim 1, characterized in that, The mould body comprises: a lower mould (200) mounted on the base plate (100); an upper mould (300) cooperating with the lower mould (200); a hydraulic cylinder (400) having an output end drivingly connected with the upper mould (300).

3. The injection mold with self-locking function and its using method according to claim 1, characterized in that, The locking device (500) comprises: a connecting block (501) fixedly connected with the upper mould (300); a plug rod (502) having one end fixedly connected with the connecting block (501); a clamping seat (503) fixedly mounted on a side of the lower mould (200), the plug rod (502) being slidably and penetratingly connected with the clamping seat (503); a resilient clamping mechanism (504) mounted in a first cavity formed in the clamping seat (503).

4. The injection mold with self-locking function and its using method according to claim 3, characterized in that, The resilient clamping mechanism (504) comprises: a first sliding plate (541) slidably arranged in the first cavity; a one-way clamping block (542) fixedly mounted on the first sliding plate (541), the one-way clamping block (542) being slidably and penetratingly connected with the clamping seat (503), and a clamping groove cooperating with the one-way clamping block (542) being formed in the plug rod (502); a first resilient supporting member mounted in the first cavity and used for resiliently supporting the first sliding plate (541); a suction member mounted in the first cavity.

5. The injection mold with self-locking function and its using method according to claim 4, characterized in that, The first resilient supporting member comprises: a first guide rod (543) fixedly mounted in the first cavity and slidably and penetratingly connected with the first sliding plate (541); a first spring (544) movably sleeved on an outer portion of the first guide rod (543), the first spring (544) being used for resiliently supporting the first sliding plate (541).

6. The injection mold with self-locking function and its using method according to claim 4, wherein, The suction member comprises: an electromagnet (545) fixedly mounted in the first cavity; an iron block (546) fixedly mounted on the first sliding plate (541), and the electromagnet (545) and the iron block (546) being located opposite to each other.

7. The injection mold with self-locking function and its using method according to claim 1, wherein, The pressing unlocking device (600) comprises: a fixed seat (601) fixedly mounted on the base plate (100); a pressing cylinder (602) slidably cooperating with the fixed seat (601). A support frame (603) is fixedly installed inside the fixed seat (601), the support frame (603) is in sliding insertion connection with the bottom of the pressing cylinder (602), and the outside of the support frame (603) is sleeved with a third spring; A pressing block (604) is fixedly installed at the top of the support frame (603); A first pressing switch (605) is fixedly installed at the top of the inner cavity of the pressing cylinder (602), and the first pressing switch (605) is in electrical connection with the hydraulic cylinder (400); A pressing power supply mechanism (606) is installed inside the second cavity formed in the side of the fixed seat (601).

8. The injection mold with self-locking function and its using method according to claim 7, characterized in that, The pressing power supply mechanism (606) comprises: A second sliding plate (661) is slidingly arranged inside the second cavity; An extrusion block (662) is fixedly installed on the second sliding plate (661), and the extrusion block (662) is in sliding insertion connection with the fixed seat (601); A second elastic support is installed inside the second cavity, and the second elastic support is used for elastically supporting the second sliding plate (661); A second pressing switch (665) is fixedly installed inside the second cavity, and the second pressing switch (665) is in electrical connection with the electromagnet (545); An extrusion head (666) is fixedly installed on the second sliding plate (661), and the second pressing switch (665) corresponds to the position of the extrusion head (666).

9. The injection mold with self-locking function and its using method according to claim 8, characterized in that, The second elastic support comprises: A second guide rod (663) is fixedly installed inside the second cavity, and the second guide rod (663) is in sliding insertion connection with the second sliding plate (661); A second spring (664) is movably sleeved outside the second guide rod (663).

10. A method of using an injection mold having a self-locking function, characterized by, The use method comprises the injection mold with the self-locking function according to any one of claims 1-9, and specifically comprises the following steps: Step one: the hydraulic cylinder (400) drives the upper mold (300) to move downward, so that the insertion rod (502) is inserted into the clamping seat (503) downward, so that the insertion rod (502) extrudes the one-way clamping block (542), and after the one-way clamping block (542) is extruded into the first cavity, the one-way clamping block (542) is elastically supported by the first spring (544), and the one-way clamping block (542) is slid to the inside of the clamping groove in the direction of the insertion rod (502), so that the relative position between the lower mold (200) and the upper mold (300) is locked; Step two, when the accommodation is completed, the pressing cylinder (602) is pressed downward, so that the pressing cylinder (602) moves downward under the limiting of the support frame (603), when the pressing cylinder (602) moves downward, it will first squeeze the pressing block (662) first, so that the pressing block (662) drives the second sliding plate (661) to press the second spring (664), so that the pressing head (666) moves towards the direction of the second pressing switch (665) and is pressed, so that the electromagnet (545) is electrified to generate magnetism, attracts the iron block (546), and the one-way clamping block (542) slides towards the electromagnet (545) under the drive of the iron block (546) to separate from the inner cavity of the clamping groove, realize the unlocking of the relative position between the plug rod (502) and the clamping seat (503), then continue to press the pressing cylinder (602), so that the pressing block (604) further presses the first pressing switch (605), so that the hydraulic cylinder (400) is electrified to run, drives the upper die (300) to move upward, realizes the injection molding process.

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