Mold quick change structure of power tool

Abstract

This utility model relates to the field of injection molding technology, particularly a quick-change mold structure for power tools. It includes: a lower mold base and an upper mold base, the lower and upper mold bases being fixed by a detachable connection mechanism; a lower mold, detachably disposed within the lower mold base, composed of a lower left module and a lower right module; and an upper mold, detachably disposed within the upper mold base, composed of an upper left module and a lower left module. When the upper and lower molds are closed, they together form an injection cavity adapted to the housing of the power tool. A locking mechanism, at least four sets, is provided, two of which detachably fix the upper mold to the upper mold base. The advantages of this utility model are: the upper and lower molds are composed of detachable left and right modules, both of which can be replaced independently and quickly. When developing new products or upgrading existing products, it is not necessary to manufacture a completely new set of molds; only the specific left / right modules that need to be changed need to be designed and manufactured, significantly shortening the development cycle and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of mold injection technology, and in particular to quick-change mold structures for power tools. Background Technology

[0002] In the injection molding production of power tool housings, products are updated and iterated rapidly. Different models or series of products often need to share core components (such as standardized battery compartments), while only the housing shape, size or local features are changed.

[0003] Traditional one-piece injection molds, such as the injection mold for a plastic housing of an electric tool proposed in CN217434952U, have upper and lower mold plates that are both integral structures. When dealing with the diverse and rapidly iterating needs of the aforementioned products, such traditional one-piece molds require the replacement of the entire upper or lower mold as a whole when different models need to be produced or local features need to be modified, even if the core structure remains unchanged. This is costly and time-consuming. If one attempts to directly modify local features on the existing mold, processing on the one-piece mold plate is extremely difficult and risky.

[0004] To address this issue, this utility model proposes a quick-change mold structure for power tools. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0006] Therefore, one objective of this utility model is to propose a quick-change mold structure for power tools to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0007] To achieve the above objectives, one embodiment of this utility model provides a quick-change mold structure for power tools, comprising: a lower mold base and an upper mold base, wherein the lower mold base and the upper mold base are fixed by a detachable connection mechanism; a lower mold, detachably disposed within the lower mold base, wherein the lower mold is composed of a lower left module and a lower right module; an upper mold, detachably disposed within the upper mold base, wherein the upper mold is composed of an upper left module and a lower left module; when the upper mold and the lower mold are closed, they together form an injection cavity adapted to the housing of the power tool; and a locking mechanism, comprising at least four sets, wherein two sets detachably fix the upper mold to the upper mold base, and the other two sets detachably fix the lower mold to the lower mold base.

[0008] Preferably, in any of the above schemes, the locking mechanism comprises two sets of identical locking components, which are symmetrically distributed.

[0009] Preferably, in any of the above embodiments, a single locking assembly comprises: a fixing block, the main body of which is T-shaped and has an internal cavity; a sliding plate, which is slidably engaged with the cavity, and a locking block is fixedly mounted on the sliding plate; a driving plate, which is slidably engaged with the cavity, and has an inclined surface that maintains contact with the sliding plate; a cylindrical rod, which is fixedly connected to the driving plate, and has a first limiting plate and a second limiting plate fixedly mounted on the cylindrical rod; and a connecting plate, one end of which has an operating ring fixedly mounted, and the other end of which has a collar fixedly mounted, the collar having a semi-annular groove, the collar being rotatably engaged with the cylindrical rod, and the semi-annular groove being slidably engaged with both the first limiting plate and the second limiting plate.

[0010] Preferably, in any of the above embodiments, a first fixing plate and a second fixing plate are installed in the cavity, a limiting rod is installed on the first fixing plate, and the cylindrical rod is slidably engaged with the second fixing plate; a through hole is provided on the sliding plate, and the through hole is slidably engaged with the limiting rod.

[0011] Preferably, in any of the above embodiments, the locking assembly further includes: a first spring, one end of which is fixedly connected to the first fixing plate and the other end of which is fixedly connected to the sliding plate; and a second spring, one end of which is fixedly connected to the second fixing plate and the other end of which is fixedly connected to the drive plate.

[0012] Preferably, both ends of the lower mold base are provided with a first through groove communicating with the cavity, and each of the first through grooves is provided with a first deep groove and a first shallow groove for the connecting plate to be embedded.

[0013] Both ends of the upper mold base are provided with a second through groove communicating with the cavity. Each of the second through grooves is provided with a second deep groove and a second shallow groove for the connecting plate to be embedded.

[0014] Preferably, in any of the above solutions, the lower left module and the lower right module are provided with a first connecting groove for embedding the fixing block. The first connecting groove is T-shaped and has a first locking groove that cooperates with the locking block.

[0015] Preferably, in any of the above solutions, the upper left module and the upper right module are provided with a second connecting groove for embedding the fixing block. The first connecting groove is T-shaped, and the second connecting groove is provided with a second locking groove that cooperates with the locking block.

[0016] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0017] 1. The upper and lower molds are composed of separate left and right modules that can be replaced independently and quickly. When developing new products or upgrading existing products, there is no need to manufacture a completely new set of molds. Only the specific left / right modules that need to be changed need to be designed and manufactured, which greatly shortens the development cycle and costs.

[0018] 2. The locking mechanism allows for quick disassembly and assembly of the modules that need to be replaced.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the disassembled mold base according to an embodiment of the present utility model;

[0023] Figure 3 This is a partial cross-sectional schematic diagram according to an embodiment of the present utility model;

[0024] Figure 4 According to the embodiments of this utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic cross-sectional view of the fixing block according to an embodiment of the present utility model;

[0026] Figure 6 This is a partial cross-sectional view of the fixing block according to an embodiment of the present utility model;

[0027] Figure 7 This is a schematic cross-sectional view of the sliding block according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the cylindrical rod connection according to an embodiment of the present utility model;

[0029] Figure 9 According to the embodiments of this utility model Figure 8 Enlarged diagram of point B in the middle.

[0030] In the diagram: 1. Lower mold base, 2. Upper mold base, 3. Lower mold, 31. Lower left module, 32. Lower right module, 4. Upper mold, 41. Upper left module, 42. Upper right module, 5. Locking assembly, 51. Fixing block, 5101. First fixing plate, 5102. Second fixing plate, 52. Sliding plate, 5201. Locking block, 53. Drive plate, 54. Cylindrical rod, 5401. First limiting plate, 5402. Second limiting plate, 55. Connecting plate, 5501. Operating ring, 5502. Collar, 56. First spring, 57. Second spring. Detailed Implementation

[0031] like Figures 1 to 9 As shown, the quick-change mold structure of the power tool includes a lower mold base 1, an upper mold base 2, a lower mold 3, an upper mold 4, and a locking mechanism.

[0032] Furthermore, the locking mechanism is provided with at least four sets, of which two sets detachably fix the upper mold 4 to the upper mold base 2, and the other two sets detachably fix the lower mold 3 to the lower mold base 1. Each set of the locking mechanism includes two sets of identical locking components 5, which are symmetrically distributed.

[0033] The four locking mechanisms are divided into a first locking mechanism, a second locking mechanism, a third locking mechanism, and a fourth locking mechanism. The first locking mechanism is used to lock the lower mold base 1 and the lower left module 31. The second locking mechanism is used to lock the lower mold base 1 and the lower right module 32. The third locking mechanism is used to lock the upper mold base 2 and the upper left module 41. The fourth locking mechanism is used to lock the upper mold base 2 and the upper right module 42.

[0034] Specifically, the locking component 5 in a single set includes:

[0035] The fixing block 51 has a T-shaped main body and a cavity inside. The cavity inside the fixing block 51 is open at three ends.

[0036] The sliding plate 52 is slidably engaged with the cavity, and a locking block 5201 is fixedly provided on the sliding plate 52;

[0037] The drive plate 53 is slidably engaged with the cavity, and the drive plate 53 is provided with an inclined surface that keeps in contact with the sliding plate 52.

[0038] A cylindrical rod 54 is fixedly connected to a drive plate 53. A first limiting plate 5401 and a second limiting plate 5402 are fixedly provided on the cylindrical rod 54. The extension line of the first limiting plate 5401 and the extension line of the second limiting plate 5402 are perpendicular to each other.

[0039] The connecting plate 55 has an operating ring 5501 fixed at one end and a collar 5502 fixed at the other end. The collar 5502 has a semi-annular groove. The collar 5502 is rotatably engaged with the cylindrical rod 54. The semi-annular groove is slidably engaged with both the first limiting plate 5401 and the second limiting plate 5402.

[0040] A first fixing plate 5101 and a second fixing plate 5102 are installed in the cavity. A limiting rod is installed on the first fixing plate 5101. The cylindrical rod 54 is in sliding fit with the second fixing plate 5102.

[0041] The sliding plate 52 has a through hole, which is slidably engaged with the limiting rod;

[0042] Also includes:

[0043] The first spring 56 has one end fixedly connected to the first fixed plate 5101 and the other end fixedly connected to the sliding plate 52. The first spring 56 is used to provide force to the sliding plate 52.

[0044] The second spring 57 has one end fixedly connected to the second fixed plate 5102 and the other end fixedly connected to the drive plate 53. The second spring 57 is used to provide force to the drive plate 53.

[0045] The elastic force of the second spring 57 is greater than that of the first spring 56;

[0046] The arrangement of the first limiting plate 5401 and the second limiting plate 5402 allows the collar 5502 to rotate only 90° on the cylindrical rod 54.

[0047] Furthermore, the lower mold base 1 and the upper mold base 2 are fixed by a detachable connection mechanism;

[0048] Both ends of the lower mold base 1 are provided with a first through groove communicating with the cavity. Each of the first through grooves is provided with a first deep groove and a first shallow groove for the connecting plate 55 to be embedded. The projection of the first deep groove and the first shallow groove is cross-shaped.

[0049] Both ends of the upper mold base 2 are provided with a second through groove communicating with the cavity. Each second through groove is provided with a second deep groove and a second shallow groove for the connecting plate 55 to be embedded. The projection of the second deep groove and the second shallow groove is cross-shaped.

[0050] The bottom edge of the first through groove is in contact with the inner wall of the lower mold base 1;

[0051] The bottom edge of the second through groove is attached to the inner wall of the upper mold base 2;

[0052] The first deep groove and the second deep groove have the same depth, and the first shallow groove and the second shallow groove have the same depth. By embedding the connecting plate 55 into grooves of different depths, the locking component 5 can be temporarily fixed in different states.

[0053] When the connecting plate 55 is embedded in a shallow groove, most of the groove is outside the groove. When the connecting plate 55 is embedded in a deep groove, only the operating ring 5501 is outside the groove.

[0054] Furthermore, the lower mold 3 is detachably disposed within the lower mold base 1, and the lower mold 3 is composed of a lower left module 31 and a lower right module 32 joined together;

[0055] Both the lower left module 31 and the lower right module 32 are provided with a first connecting groove for embedding the fixing block 51. The first connecting groove is T-shaped and a first locking groove is provided inside the first connecting groove to cooperate with the locking block 5201.

[0056] The cooperation between the first connecting groove and the fixing block 51 also limits the installation of the left and right lower modules 32.

[0057] Furthermore, the upper mold 4 is detachably disposed within the upper mold base 2, and the upper mold 4 is composed of an upper left module 41 and a lower left module 31 joined together;

[0058] Both the upper left module 41 and the upper right module 42 are provided with a second connecting groove for embedding the fixing block 51. The first connecting groove is T-shaped, and the second connecting groove is provided with a second locking groove that cooperates with the locking block 5201.

[0059] The cooperation between the second connecting groove and the fixing block 51 also limits the installation of the left and right upper modules 42.

[0060] Specifically, the upper mold base 2 has an injection port, which is connected to the casting channel integrated into the upper mold.

[0061] Note: Since the connection relationship and structure between the locking component and the mold are the same, only a partial schematic diagram is shown in the attached drawings. Figure 3-4 )

[0062] The quick-change mold structure of power tools works on the following principle:

[0063] When disassembling and assembling the modules (the disassembly and assembly principles of the four modules are the same, taking the lower left module 31 as the reference):

[0064] During disassembly, first pull the pull ring outwards, causing the connecting plate 55 to disengage from the first deep groove and the cylindrical rod 54 to move, which in turn pulls the drive plate 53 to move, and the second spring 57 to be compressed. As the drive plate 53 is pulled, the sliding plate 52 is no longer under force, and the first spring 56 is no longer under force and moves from the compressed state to the unfolded state, driving the sliding plate 52 to move and causing the locking block 5201 to disengage from the first locking groove. When the connecting plate 55 is no longer in contact with the first deep groove, rotate the connecting plate 55 so that the connecting plate 55 and the first shallow groove are changed from being perpendicular to each other to being collinear. At this time, the connecting plate 55 can be embedded into the first shallow groove, and then the module can be removed.

[0065] During installation, keep the connecting plate 55 embedded in the first shallow groove, place the replacement module at the position where the 3rd module can be removed, pull the connecting plate 55 away from the first shallow groove, when the connecting plate 55 is no longer in contact with the first shallow groove, rotate the connecting plate 55 and drive the connecting plate 55 to move into the first deep groove, when the connecting plate 55 contacts the first deep groove, the pull ring can be released, so that the second spring 57 is no longer under force and moves from a compressed state to an unfolded state, driving the drive plate 53 to move, and applying force to the sliding plate 52, causing the sliding plate 52 to move, and compressing the first spring 56, simultaneously driving the locking block 5201, so that the locking block 5201 is embedded in the first locking groove, and the installation is completed.

Claims

1. A quick-change mold structure for power tools, characterized in that: include: A lower mold base and an upper mold base, wherein the lower mold base and the upper mold base are fixed by a detachable connection mechanism; The lower mold is detachably located inside the lower mold base, and the lower mold is composed of a lower left module and a lower right module spliced ​​together; The upper mold is detachably located inside the upper mold base, and the upper mold is composed of an upper left module and a lower left module spliced ​​together; When the upper mold and the lower mold are closed, they together form an injection cavity that fits the housing of a power tool; The locking mechanism has at least four sets, two of which detachably fix the upper mold to the upper mold base, and the other two sets detachably fix the lower mold to the lower mold base.

2. The quick-change mold structure for power tools according to claim 1, characterized in that: The locking mechanism of a single set comprises two identical sets of locking components, which are symmetrically distributed.

3. The quick-change mold structure for power tools according to claim 2, characterized in that: The single set of locking components includes: The fixing block has a T-shaped main body and a cavity inside; A sliding plate is slidably fitted with the cavity, and a locking block is fixedly provided on the sliding plate; The drive plate is slidably fitted with the cavity, and the drive plate is provided with an inclined surface that keeps in contact with the sliding plate. A cylindrical rod is fixedly connected to a drive plate, and a first limiting plate and a second limiting plate are fixedly provided on the cylindrical rod. The connecting plate has an operating ring fixed at one end and a collar fixed at the other end. The collar has a semi-annular groove. The collar is rotatably engaged with the cylindrical rod, and the semi-annular groove is slidably engaged with both the first limiting plate and the second limiting plate.

4. The quick-change mold structure for power tools according to claim 3, characterized in that: A first fixing plate and a second fixing plate are installed inside the cavity. A limiting rod is installed on the first fixing plate, and the cylindrical rod is in sliding fit with the second fixing plate. A through hole is provided on the sliding plate, and the through hole is in sliding fit with the limiting rod.

5. The quick-change mold structure for power tools according to claim 4, characterized in that: The locking components in a single set also include: The first spring has one end fixedly connected to the first fixed plate and the other end fixedly connected to the sliding plate; The second spring has one end fixedly connected to the second fixed plate and the other end fixedly connected to the drive plate.

6. The quick-change mold structure for power tools according to claim 5, characterized in that: Both ends of the lower mold base are provided with a first through groove communicating with the cavity, and each of the first through grooves is provided with a first deep groove and a first shallow groove for the connecting plate to be embedded. Both ends of the upper mold base are provided with a second through groove communicating with the cavity. Each of the second through grooves is provided with a second deep groove and a second shallow groove for the connecting plate to be embedded.

7. The quick-change mold structure for power tools according to claim 5, characterized in that: Both the lower left and lower right modules have a first connecting groove for embedding a fixing block. The first connecting groove is T-shaped and has a first locking groove that cooperates with the locking block.

8. The quick-change mold structure for power tools according to claim 5, characterized in that: Both the upper left and upper right modules are provided with a second connecting groove for embedding a fixing block. The second connecting groove is T-shaped and has a second locking groove that cooperates with the locking block.

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