Lower mold and injection mold

Abstract

The invention relates to the technical field of injection molds, and provides a lower mold which comprises a lower mold core, a lower mold plate, a plurality of springs and a plurality of connecting assemblies. A plurality of sliding grooves are formed in the end, close to the lower die plate, of the lower die core. One end of each spring is arranged in the sliding groove, and the other end of each spring is arranged on the lower mold plate, so that the lower mold plate is driven to be away from the lower mold core; the connecting assemblies are arranged corresponding to the springs; the connecting assembly comprises a guide rod and a pressing plate; the guide rod is in threaded connection with the side, away from the lower mold core, of the lower mold core and penetrates through the sliding groove, and the guide rod is sleeved with the spring; the pressing plate is connected into the sliding groove in a sliding mode and is in threaded connection with the guide rod, and the spring abuts against the side, close to the lower die plate, of the pressing plate. On the basis, the spring can be conveniently replaced. In addition, the invention further provides an injection mold.

Description

Technical Field

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

[0002] An injection mold is a tool used to produce plastic products, which can give plastic products a complete structure and precise size.

[0003] In the related art, the injection mold includes an upper mold and a lower mold, and an injection cavity is formed between the upper mold and the lower mold. Among them, the lower mold includes a lower mold base, a lower mold core, a lower mold plate and a plurality of ejector rods. The lower mold core is installed at the upper end of the lower mold base, and the lower mold plate is slidably connected to the lower mold base. A plurality of ejector rods are fixedly connected to the upper side of the lower mold plate and movably penetrate the lower mold core. The product after injection molding is located in the lower mold core. The lower mold plate is pushed by the oil cylinder to approach the lower mold core, so that a plurality of ejector rods extend into the lower mold core to eject the injection molded product. At the same time, a plurality of springs are installed between the lower mold plate and the lower mold core, and each spring is guided and limited by a guide rod, which can effectively reduce impact and wear, and can also ensure the mold closing accuracy and stability of the injection mold.

[0004] However, in actual applications, the spring needs to be replaced after being used for a certain period of time. During the replacement process, the lower mold core needs to be removed from the lower mold base, and then the lower mold core needs to be transferred by a lifting device for replacement. The operation is more troublesome, so it needs to be improved. Summary of the invention

[0005] In order to facilitate the replacement of the spring, in a first aspect, the present application provides a lower mold.

[0006] The present application provides a lower mold adopting the following technical solution: A lower mold, comprising a lower mold core, a lower mold plate, multiple springs and multiple connecting components; a plurality of sliding grooves are opened at one end of the lower mold core close to the lower mold plate; one end of each spring is arranged in the sliding groove, and the other end is arranged on the lower mold plate to drive the lower mold plate away from the lower mold core; each connecting component is arranged corresponding to each spring; the connecting component comprises a guide rod and a pressure plate; the guide rod is threadedly connected to a side of the lower mold core away from the lower mold core and is penetrated through the sliding groove, and the spring is sleeved on the guide rod; the pressure plate is slidably connected in the sliding groove and is threadedly connected to the guide rod, and the spring abuts against a side of the pressure plate close to the lower mold plate; wherein, when the guide rod is rotated, the moving direction of the guide rod is opposite to the moving direction of the pressure plate.

[0007] By adopting the above technical solution, when the spring needs to be replaced, the staff rotates the corresponding guide rod to move the guide rod upward so that the lower end of the guide rod is away from the lower template. At the same time, the guide rod drives the pressure plate to slide downward along the sliding groove, so that the pressure plate squeezes the spring and pushes the spring out, so that the spring extends out of the sliding groove, and then the lower end of the spring is bent to make the spring detach from the lower mold core and the lower template to achieve disassembly of the spring; similarly, the two ends of the spring are respectively abutted against the lower mold core and the lower template, and then the guide rod is rotated to make the spring extend into the sliding groove to complete the installation of the spring, making the disassembly and installation of the spring simple and convenient, thereby facilitating the replacement of the spring.

[0008] Preferably, a limiting groove is provided on the lower mold core at the sliding groove, and a limiting block is provided on the peripheral side of the pressure plate, and the limiting block is slidingly limited in the limiting groove.

[0009] By adopting the above technical solution and providing the limit block and the limit groove, the rotation of the pressing plate in the sliding groove can be limited, so that the pressing plate can be more stably slidably connected in the sliding groove.

[0010] Preferably, the connecting assembly further comprises a limit plate, and the limit plate is arranged at one end of the guide rod close to the lower template, and when the spring extends out of the sliding groove, the limit plate abuts against the pressure plate.

[0011] By adopting the above technical solution and setting a limit plate, when the spring extends out of the sliding groove, the limit plate abuts against the pressure plate to limit the pressure plate from continuing to slide downward and to avoid the limit plate from leaving the sliding groove as much as possible.

[0012] Preferably, the limiting plate is threadedly connected to the guide rod.

[0013] By adopting the above technical solution, the limit plate is threadedly connected to the guide rod to facilitate adjustment of the position between the limit plate and the guide rod, thereby facilitating accurate timing of the limit plate abutting against the pressure plate.

[0014] Preferably, a limiting strip is provided on one side of the limiting block close to the lower mold core, and the limiting strip is slidably limited in the limiting groove.

[0015] By adopting the above technical solution and providing a limit bar, the limit bar is slidably connected in the limit groove, so as to improve the stability of the pressure plate slidably connected to the sliding groove.

[0016] Preferably, the connecting assembly also includes an abutment member, which includes an abutment portion and a sliding portion, wherein the sliding portion is arranged on a side of the abutment portion away from the spring and is slidably connected to a side of the lower mold plate close to the lower mold core, and an inclined abutment surface is provided at one end of the sliding portion away from the abutment portion, and when the limit strip abuts against the abutment surface, the sliding portion slides toward the end close to the abutment portion.

[0017] By adopting the above technical solution and setting an abutment, when the pressure plate slides downward, the limit strip abuts against the abutment surface to drive the sliding part to slide downward toward one end of the abutment part, so that the abutment part pushes the lower end of the spring to move the lower end of the spring away from the lower template, thereby facilitating the disassembly of the spring.

[0018] Preferably, the abutment portion is arranged in an arc shape on a side away from the sliding portion.

[0019] By adopting the above technical solution, by setting the side of the abutment portion away from the sliding portion to be arc-shaped, the abutment portion can fully and stably push out the spring, and the space occupied by the abutment member can also be saved.

[0020] Preferably, the connecting assembly further comprises an elastic member, wherein the elastic member is arranged between the abutting portion and the lower template to drive the abutting portion away from the spring.

[0021] By adopting the above technical solution and providing an elastic member, the abutting portion can be reset to avoid affecting the installation of the spring as much as possible, so as to facilitate the installation of the spring.

[0022] Preferably, the elastic member is sleeved on the sliding portion.

[0023] By adopting the above technical solution and arranging the elastic member to be sleeved on the sliding portion, the elastic member can work more stably.

[0024] In a second aspect, the present application provides an injection mold.

[0025] The present application provides an injection mold that adopts the following technical solution: An injection mold comprises the lower mold described above.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the spring needs to be replaced, the staff rotates the corresponding guide rod to move the guide rod upward so that the lower end of the guide rod is away from the lower template. At the same time, the guide rod drives the pressure plate to slide downward along the sliding groove, so that the pressure plate squeezes the spring and pushes the spring out, so that the spring extends out of the sliding groove, and then the lower end of the spring is bent to make the spring separate from the lower mold core and the lower template to achieve the disassembly of the spring; similarly, the two ends of the spring are respectively abutted against the lower mold core and the lower template, and then the guide rod is rotated to make the spring extend into the sliding groove to complete the installation of the spring, making the disassembly and installation of the spring simple and convenient, thereby facilitating the replacement of the spring; 2. By setting a limit plate, when the spring extends out of the sliding groove, the limit plate abuts against the pressure plate to limit the pressure plate from continuing to slide downward, and try to avoid the limit plate from leaving the sliding groove; 3. By setting an abutment, when the pressure plate slides downward, the limit strip abuts against the abutment surface to drive the sliding part to slide downward toward one end of the abutment part, so that the abutment part pushes the lower end of the spring to move the lower end of the spring away from the lower template, thereby facilitating the disassembly of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the lower mold in the embodiment of the present application; Figure 2 Schematic diagram of the overall structure of the lower mold core in the embodiment of the present application; Figure 3 It is a schematic diagram of the structure of the lower mold part in the embodiment of the present application; Figure 4 It is a schematic diagram of the explosion of the lower mold part in the embodiment of the present application; Figure 5 yes Figure 3 A magnified schematic diagram of part A in FIG. Figure 6 It is a schematic diagram of the overall structure of the injection mold in the embodiment of the present application.

[0028] Attached figures: 1. lower die base; 2. lower die core; 21. sliding groove; 22. limiting groove; 3. lower die plate; 4. spring; 5. connecting assembly; 51. guide rod; 52. pressure plate; 521. limiting block; 522. limiting strip; 53. limiting plate; 54. abutment; 541. abutment portion; 542. sliding portion; 543. abutment surface; 55. elastic member; 6. upper die. DETAILED DESCRIPTION

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The following is combined with Figure 1-6 This application is described in further detail.

[0032] The embodiment of the present application discloses a lower mold.

[0033] Reference Figure 1 and Figure 2 The lower die includes a lower die base 1, a lower die core 2, a lower die plate 3, a plurality of springs 4 and a plurality of connecting components 5. The lower die core 2 is fixedly connected to the upper end of the lower die base 1, and a plurality of sliding grooves 21 are provided at the lower end of the lower die core 2. In this embodiment, the number of the sliding grooves 21 is four, and the four sliding grooves 21 are distributed in a rectangular shape and are arranged in the vertical direction. The lower die plate 3 is located below the lower die core 2, and the lower die plate 3 is slidably connected to the lower die base 1 in the vertical direction.

[0034] Reference Figure 3 and Figure 4 , the number of springs 4 and connecting components 5 is the same as the number of sliding grooves 21, and each spring 4 corresponds to each connecting component 5 and each sliding groove 21. Specifically, the upper end of each spring 4 is located in each sliding groove 21, and the lower end elastically abuts against the upper side of the lower mold plate 3 to drive the lower mold plate 3 away from the lower mold core 2. Among them, the connecting component 5 includes a guide rod 51 and a pressing plate 52, the guide rod 51 is threadedly connected to the upper side of the lower mold core 2, the guide rod 51 is coaxially arranged with the sliding groove 21 and penetrates the sliding groove 21, the pressing plate 52 is slidably connected in the sliding groove 21 and threadedly connected with the guide rod 51, the spring 4 is sleeved on the guide rod 51 to improve the stability of use, and the upper end of the spring 4 elastically abuts against the lower side of the pressing plate 52. It should be noted that by setting the thread direction of the pressing plate 52 and the thread direction of the lower mold core 2, when the guide rod 51 rotates, the moving direction of the guide rod 51 is set opposite to the moving direction of the pressing plate 52.

[0035] When one of the springs 4 needs to be replaced, the staff rotates the corresponding guide rod 51. Since the guide rod 51 is threadedly connected to the lower mold core 2, the guide rod 51 moves upward so that the lower end of the guide rod 51 is away from the lower mold plate 3. At the same time, since the pressing plate 52 is slidably connected to the sliding groove 21 and threadedly connected to the guide rod 51, the guide rod 51 drives the pressing plate 52 to slide downward, so that the pressing plate 52 squeezes the spring 4 and pushes the spring 4 out, so that the upper end of the spring 4 extends out of the sliding groove 21. Then, the staff bends the lower end of the spring 4 to make the spring 4 separate from the lower mold core 2 and the lower mold plate 3, and the spring 4 can be disassembled. Similarly, the two ends of the spring 4 are respectively abutted against the lower mold core 2 and the lower mold plate 3, and then the upper end of the spring 4 is extended into the sliding groove 21 by rotating the guide rod 51, and the installation of the spring 4 can be completed. Therefore, there is no need to disassemble the lower mold core 2 from the lower mold base 1, making the disassembly and installation of the spring 4 simple and convenient, thereby facilitating the replacement of the spring 4.

[0036] Reference Figure 4 In some embodiments, the lower mold core 2 is provided with a limiting groove 22 at each sliding groove 21. The limiting groove 22 is arranged in the vertical direction and has a rectangular cross-section. The peripheral side of the pressure plate 52 protrudes to form a limiting block 521. The limiting block 521 is a rectangular block so that the limiting block 521 can be slidably limited in the limiting groove 22. In this way, the pressure plate 52 can be slidably connected to the sliding groove 21. At the same time, with the cooperation of the limiting block 521 and the limiting groove 22, the rotation of the pressure plate 52 in the sliding groove 21 is limited, so that the pressure plate 52 can be more stably slidably connected to the sliding groove 21, thereby improving the stability of the pressure plate 52 in squeezing the spring 4.

[0037] In some embodiments, the connection assembly 5 further includes a limit plate 53, which is fixedly connected to the lower end of the guide rod 51 and is located in the spring 4. By rotating the guide rod 51, when the pressure plate 52 extends the spring 4 out of the sliding groove 21, the limit plate 53 abuts against the lower side of the pressure plate 52. At this time, the guide rod 51 cannot be rotated further to limit the pressure plate 52 from sliding downward, and the limit plate 53 is prevented from being separated from the sliding groove 21 as much as possible, and feedback can be given to the staff that the guide rod 51 is rotated in place.

[0038] In some embodiments, the limiting plate 53 is threadedly connected to the guide rod 51 to facilitate adjustment of the position between the limiting plate 53 and the guide rod 51 , thereby facilitating accurate timing of the limiting plate 53 abutting against the pressure plate 52 .

[0039] In some embodiments, the lower side of the limit block 521 is integrally connected to a limit strip 522 , which is arranged in a rectangular strip shape and is also slidably connected in the limit groove 22 , thereby further improving the stability of the pressure plate 52 slidably connected to the sliding groove 21 .

[0040] Reference Figure 3 and Figure 5 In some embodiments, the connecting assembly 5 also includes an abutment member 54, the abutment member 54 includes an abutment portion 541 and a sliding portion 542, the sliding portion 542 is integrally connected to the side of the abutment portion 541 away from the spring 4, and the sliding portion 542 is slidingly connected to the upper side of the lower template 3, and the upper side of the sliding portion 542 away from one end of the abutment portion 541 has an inclined abutment surface 543, and the abutment surface 543 is used to abut against the lower end of the limit strip 522. In actual application, when the pressure plate 52 slides downward, the limiting strip 522 also slides downward and abuts against the abutting surface 543. Since the abutting surface 543 is inclined, the sliding portion 542 slides downward close to one end of the abutting portion 541, so that the abutting portion 541 contacts the lower end of the spring 4. At this time, the lower end of the spring 4 is separated from the lower mold plate 3 to achieve automatic disassembly of the lower end of the spring 4, and resets under the elastic action of the spring 4 to facilitate the separation of the upper end of the spring 4 from the lower mold core 2. It should be noted that there is a certain distance between the lower end of the guide rod 51 and the limiting plate 53, so that the upper end of the spring 4 abuts against the lower end of the guide rod 51 under the action of its own elasticity, and the lower end of the spring 4 is prevented from moving after being separated from the lower mold plate 3 as much as possible, so as to improve the stability of the disassembly of the spring 4.

[0041] In some embodiments, the side of the abutment portion 541 away from the sliding portion 542 is arranged in an arc shape so that the abutment portion 541 can fit against the lower end of the spring 4, so that the abutment portion 541 can fully and stably push out the spring 4, while also saving the space occupied by the abutment member 54.

[0042] In some embodiments, the connecting assembly 5 also includes an elastic member 55, which is also a spring 4. One end of the elastic member 55 is fixedly connected to the abutment portion 541, and the other end is fixedly connected to the lower template 3 to drive the abutment portion 541 away from the spring 4 to achieve the resetting of the abutment portion 541, and try to avoid affecting the installation of the spring 4, so as to facilitate the installation of the spring 4.

[0043] In some embodiments, the elastic member 55 is sleeved on the sliding portion 542 to limit the elastic member 55 and avoid excessive bending of the elastic member 55 to cause damage, so that the elastic member 55 can work more stably and increase the service life of the elastic member 55.

[0044] The implementation principle of this embodiment is as follows: when one of the springs 4 needs to be replaced, the staff rotates the corresponding guide rod 51. Since the guide rod 51 is threadedly connected to the lower mold core 2, the guide rod 51 moves upward so that the lower end of the guide rod 51 is away from the lower mold plate 3. At the same time, since the pressing plate 52 is slidably connected to the sliding groove 21 and threadedly connected to the guide rod 51, the guide rod 51 drives the pressing plate 52 to slide downward so that the pressing plate 52 squeezes the spring 4 and pushes the spring 4 out, so that the upper end of the spring 4 extends out of the sliding groove 21. Then, the staff bends the lower end of the spring 4 so that the spring 4 is separated from the lower mold core 2 and the lower mold plate 3, and the spring 4 can be disassembled. Similarly, the two ends of the spring 4 are respectively abutted against the lower mold core 2 and the lower mold plate 3, and then the upper end of the spring 4 is extended into the sliding groove 21 by rotating the guide rod 51, so that the installation of the spring 4 can be completed. Therefore, there is no need to disassemble the lower mold core 2 from the lower mold base 1, so that the disassembly and installation of the spring 4 are simple and convenient, thereby facilitating the replacement of the spring 4.

[0045] The embodiment of the present application also discloses an injection mold.

[0046] Reference Figure 6 The injection mold includes an upper mold 6 and a lower mold described in the above embodiment. The upper mold 6 is connected to the lower mold core 2 to form an injection molding cavity (not shown in the figure).

[0047] 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 lower die, characterized in that: The invention comprises a lower mold core (2), a lower mold plate (3), a plurality of springs (4) and a plurality of connecting components (5); a plurality of sliding grooves (21) are provided at one end of the lower mold core (2) close to the lower mold plate (3); one end of each of the springs (4) is arranged in the sliding groove (21), and the other end is arranged in the lower mold plate (3) so as to drive the lower mold plate (3) away from the lower mold core (2); each of the connecting components (5) is arranged corresponding to each of the springs (4); the connecting components (5) comprise a guide rod (51) and a pressure plate (52); the guide rod (51) is threadedly connected to the side of the lower mold core (2) away from the lower mold core (2) and is inserted into the sliding groove (21), and the spring (4) is sleeved on the guide rod (51); the pressure plate (52) is slidingly connected in the sliding groove (21) and is threadedly connected to the guide rod (51), and the spring (4) abuts against the side of the pressure plate (52) close to the lower mold plate (3); wherein, when the guide rod (51) is rotated, the moving direction of the guide rod (51) is opposite to the moving direction of the pressure plate (52).

2. A lower die according to claim 1, characterized in that: The lower mold core (2) is provided with a limit groove (22) at the sliding groove (21), and a limit block (521) is provided on the peripheral side of the pressing plate (52), and the limit block (521) is slidably limited in the limit groove (22).

3. A lower die according to claim 2, characterized in that: The connecting assembly (5) further comprises a limit plate (53), wherein the limit plate (53) is arranged at one end of the guide rod (51) close to the lower template (3), and when the spring (4) extends out of the sliding groove (21), the limit plate (53) abuts against the pressure plate (52).

4. A lower die according to claim 3, characterized in that: The limiting plate (53) is threadedly connected to the guide rod (51).

5. A lower die according to claim 2, characterized in that: A limiting strip (522) is provided on one side of the limiting block (521) close to the lower mold core (2), and the limiting strip (522) is slidably limited in the limiting groove (22).

6. A lower die according to claim 5, characterized in that: The connecting assembly (5) further comprises an abutment member (54), wherein the abutment member (54) comprises an abutment portion (541) and a sliding portion (542), wherein the sliding portion (542) is arranged on a side of the abutment portion (541) away from the spring (4) and is slidably connected to a side of the lower mold plate (3) close to the lower mold core (2), and an inclined abutment surface (543) is provided at one end of the sliding portion (542) away from the abutment portion (541), and when the limiting strip (522) abuts against the abutment surface (543), the sliding portion (542) slides toward the end close to the abutment portion (541).

7. A lower die according to claim 6, characterized in that: The side of the abutting portion (541) away from the sliding portion (542) is arranged in an arc shape.

8. A lower die according to claim 6, characterized in that: The connecting assembly (5) further comprises an elastic member (55), wherein the elastic member (55) is arranged between the abutting portion (541) and the lower mold plate (3) so as to drive the abutting portion (541) away from the spring (4).

9. A lower die according to claim 8, characterized in that: The elastic member (55) is sleeved on the sliding portion (542).

10. An injection mold, characterized in that: Comprising the lower mold as described in any one of claims 1-9.

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