Multi-cavity gear mold

Abstract

The utility model provides a multi-cavity gear mold which comprises a rear mold and a rear mold, the rear mold is provided with a rear mold plate, the rear mold plate is provided with a rear mold core, the rear mold core is provided with a plurality of first caulking grooves, a first sub-mold core is embedded in each first caulking groove, and each first sub-mold core is provided with a gear cavity; the front mold is provided with a front mold plate, the front mold plate is provided with a front mold core, the front mold core is provided with a plurality of second caulking grooves matched with the first caulking grooves in a one-to-one mode, a second sub-mold core is embedded in each second caulking groove, and each second sub-mold core is provided with a shaping face matched with the corresponding gear cavity; the multi-cavity gear mold comprises a front mold plate, a plurality of gear cavities are formed in the front mold plate, a diversion groove is formed in the back of the front mold plate, the diversion groove is provided with a primary branch corresponding to each gear cavity, and each primary branch is communicated with the corresponding gear cavity through a glue injection hole formed in the front mold plate. And therefore, the production winding displacement is optimized, and the frequency of halting to replace the mold is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a multi-cavity gear mold. Background Technology

[0002] Plastic gears are widely used in mechanical transmission, particularly in products such as micro motors, toys, and home appliances. Since plastic gears are generally less hard than metal gears, they are typically smaller and used in low-torque applications. To improve production efficiency, multiple cavities of the same size are usually designed within a single mold. However, if a product contains gears of multiple sizes, multiple mold changes are required. Furthermore, if an injection molding plant has orders for multiple gear models, it often needs to change molds after each model is completed to produce the next model. This not only reduces production efficiency due to frequent mold changes but also increases production costs because a separate mold needs to be made for each model. Utility Model Content

[0003] To address the shortcomings of the prior art, this utility model proposes a multi-cavity gear mold that can be fitted with sub-mold cores of different specifications according to production needs, so as to more flexibly control the production progress of various gears and thus improve the overall production efficiency.

[0004] This utility model proposes a multi-cavity gear mold, including a rear mold and a front mold. The rear mold is provided with a rear template, the rear template is provided with a rear mold core, the rear mold core is provided with a plurality of first slots, each first slot is provided with a first sub-mold core, and each first sub-mold core is provided with a gear cavity.

[0005] The front mold is provided with a front template, the front template is provided with a front mold core, the front mold core is provided with a plurality of second slots that are matched one-to-one with the first slot, each second slot is provided with a second sub-mold core, and each second sub-mold core is provided with a shaping surface that mates with the corresponding gear cavity;

[0006] The back of the front template is provided with a flow channel, and each gear cavity has a primary branch. Each primary branch is connected to the corresponding gear cavity through an injection hole opened on the front template.

[0007] Preferably, the rear mold core is detachably embedded in the rear template, and the front mold core is detachably embedded in the front template.

[0008] Preferably, each primary branch of the diversion channel is provided with a flow interceptor, and the flow interceptor is provided with a detachable locking block;

[0009] The card blocks include slotted card blocks and slotless card blocks. Slotted card blocks are used for primary branches that require normal glue injection, while slotless card blocks are used for primary branches that need to be cut off.

[0010] Preferably, each primary branch branches into several secondary branches, and the end of each secondary branch is connected to the corresponding gear cavity through an injection hole.

[0011] Preferably, a front mold cooling pipe is provided inside the front mold template surrounding the front mold core.

[0012] Preferably, a rear mold cooling pipe is provided inside the rear template surrounding the rear mold core.

[0013] Preferably, the first sub-mold core is fixed to the rear mold core by screws, and the second sub-mold core is fixed to the front mold core by screws.

[0014] Preferably, the back of the front template is provided with a stripping plate, which covers the opening side of the diversion channel.

[0015] The beneficial effects of this utility model include: by changing different sub-mold cores, the multi-cavity gear mold can adjust the gear production model as needed within a set of molds, thereby optimizing the production line and reducing the frequency of downtime for mold replacement, thus improving the overall production efficiency; each primary branch of the flow channel is provided with a flow intercepting groove, and after the card block is filled in the flow intercepting groove, the glue inlet channel of the corresponding primary branch can be cut off to stop the gear production of the gear cavity corresponding to that primary branch. Attached Figure Description

[0016] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0017] Figure 1 This is a perspective view of the multi-cavity gear mold of this utility model.

[0018] Figure 2 This is a front view of the rear template of this utility model.

[0019] Figure 3 This is a front view of the front template of this utility model.

[0020] Figure 4 This is an exploded view of the structure of the rear template of this utility model.

[0021] Figure 5 This is a rear view of the front template of this utility model.

[0022] Figure label:

[0023] 100-Rear mold, 110-Rear template, 111-Rear mold cooling pipe, 120-Rear mold core, 130-First slot, 140-First sub-mold core, 150-Gear cavity, 200-Front mold, 210-Front template, 211-Front mold cooling pipe, 220-Front mold core, 230-Second slot, 240-Second sub-mold core, 250-Shaping surface, 260-Flow divider, 261-Primary branch, 262-Injection hole, 263-Interceptor channel, 264-Slotted block, 265-Slotless block, 266-Secondary branch, 300-Stripper plate, 400-Injector nozzle. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0026] The principle of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] This utility model proposes a multi-cavity gear mold, including a rear mold 100 and a front mold 200. The rear mold 100 is provided with a rear template 110, a rear mold core 120, and four first slots 130. Each first slot 130 is fitted with a first sub-mold core 140, and each first sub-mold core 140 is provided with a gear cavity 150. The front mold 200 is provided with a front template 210, a front mold core 220, and four second slots 230 that are paired with the first slots 130. Each second slot 230 is fitted with a second sub-mold core 240, and each second sub-mold core 240 is provided with a shaping surface 250 that mates with the corresponding gear cavity 150. When the mold is closed, each second sub-mold core 240 engages with the corresponding first sub-mold core 140, and the gear cavity 150 is closed by the corresponding shaping surface 250.

[0028] The back of the front mold plate 210 is provided with a flow channel 260. Each gear cavity 150 has a primary branch 261, and each primary branch 261 communicates with the corresponding gear cavity 150 through an injection hole 262 on the front mold plate 210. By changing different sub-mold cores, the multi-cavity gear mold allows for adjustment of gear production models within a single mold set, thereby optimizing production lines and reducing downtime for mold changes, thus improving overall production efficiency. The back of the front mold plate 210 is provided with a stripper plate 300, which covers the opening side of the flow channel 260. The flow channel 260 communicates with the injection nozzle 400, and then branches out into four primary branches 261 to distribute the injection molding material into each gear cavity 150. During demolding, the stripper plate 300 separates from the front mold plate 210, exposing the flow channel 260 for easy waste removal.

[0029] The first slot 130 and the second slot 230 are grouped in a one-to-one correspondence, the first sub-mold core 140 and the second sub-mold core 240 are grouped in a one-to-one correspondence, and the gear cavity 150 and the molding surface 250 are grouped in a one-to-one correspondence. This embodiment has four sets of first slots 130 and second slots 230, but more types of sub-mold cores can be made to match them. The areas of the four sets of slots are different. When making the mold, the size of one set of slots can be selected according to the size of the finished gear to make the sub-mold core, that is, one set of slots can be replaced with sub-mold cores of different specifications.

[0030] In this embodiment, the rear mold core 120 is detachably embedded in the rear template 110, and the front mold core 220 is detachably embedded in the front template 210. The rear template 110 and the front mold core 220 are arranged in pairs. The multi-cavity gear mold can also use multiple sets of mold cores for replacement. Each set of mold cores uses a different size slot to adapt to more types of sub-mold cores and produce more types of gears.

[0031] In this embodiment, each primary branch 261 of the flow divider 260 is provided with a flow intercepting groove 263, and the flow intercepting groove 263 is detachably equipped with a locking block. The locking block includes a slotted locking block 264 and a slotless locking block 265. The slotted locking block 264 is used for the primary branch during normal glue injection, and the slotless locking block 265 is used for the primary branch that needs to be cut off. When a gear cavity needs to be injected with glue normally, its corresponding primary branch is equipped with a slotted locking block 264 to keep the flow channel unobstructed; when a gear cavity needs to stop production, its corresponding primary branch is equipped with a slotless locking block 265 to block the flow channel. This allows for more diversified gear production arrangements.

[0032] In this embodiment, each primary branch 261 branches out into several secondary branches 266. The end of each secondary branch 266 is connected to the corresponding gear cavity 150 through an injection hole 262. The injection holes 262 in the same group are evenly distributed above the corresponding gear cavity 150. That is, the gear is formed from the wheel disk, and then the glue is squeezed toward the central shaft and the edge teeth. Since the glue is injected evenly at multiple points, the pressure is relatively uniform when the edge teeth are formed, avoiding the formation of burrs.

[0033] In this embodiment, a front mold cooling pipe 211 is provided inside the front mold template 210 surrounding the front mold core 220. The front mold cooling pipe 211 is positioned away from the front mold core 220 to ensure that the front mold core 220 can be easily disassembled and replaced. Similarly, a rear mold cooling pipe 111 is provided inside the rear mold template 110 surrounding the rear mold core 120. The rear mold cooling pipe 111 is positioned away from the rear mold core 120 to ensure that the rear mold core 120 can be easily disassembled and replaced.

[0034] In addition, the first sub-mold core 140 is fixed to the rear mold core 120 by screws, and the second sub-mold core 240 is fixed to the front mold core 220 by screws to prevent the first sub-mold core 140 and the second sub-mold core 240 from falling off during demolding.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-cavity gear mold, comprising a rear mold and a front mold, characterized in that, The rear mold is provided with a rear template, the rear template is provided with a rear mold core, the rear mold core is provided with a plurality of first slots, each first slot is provided with a first sub-mold core, and each first sub-mold core is provided with a gear cavity; The front mold is provided with a front template, the front template is provided with a front mold core, the front mold core is provided with a plurality of second slots that are matched one-to-one with the first slot, each second slot is provided with a second sub-mold core, and each second sub-mold core is provided with a shaping surface that mates with the corresponding gear cavity; The back of the front template is provided with a flow channel, and the flow channel is provided with a primary branch for each gear cavity. Each primary branch is connected to the corresponding gear cavity through an injection hole opened on the front template.

2. The multi-cavity gear mold as described in claim 1, characterized in that, The rear mold core is detachably embedded in the rear template, and the front mold core is detachably embedded in the front template.

3. The multi-cavity gear mold as described in claim 2, characterized in that, Each primary branch of the diversion channel is provided with a flow interception channel, and the flow interception channel is detachably provided with a locking block; The card block includes a slotted card block and a slotless card block. The slotted card block is used for the primary branch of normal glue injection, and the slotless card block is used for the primary branch that needs to be cut off.

4. The multi-cavity gear mold as described in claim 3, characterized in that, Each primary branch branches into several secondary branches, and the end of each secondary branch is connected to the corresponding gear cavity through a glue injection hole.

5. The multi-cavity gear mold as described in claim 4, characterized in that, The front mold template is provided with a front mold cooling pipe surrounding the front mold core.

6. The multi-cavity gear mold as described in claim 4, characterized in that, The rear template is provided with a rear mold cooling pipe surrounding the rear mold core.

7. The multi-cavity gear mold as described in claim 4, characterized in that, The first sub-mold core is fixed to the rear mold core by screws, and the second sub-mold core is fixed to the front mold core by screws.

8. The multi-cavity gear mold as described in claim 6, characterized in that, The back of the front template is provided with a stripping plate, which covers the opening side of the diversion channel.

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