Elastic pressing type secondary core-pulling mold
By designing an elastic-pressure secondary core pulling mold including guide columns and elastic limiting parts, the problems of low efficiency and low yield in the existing injection molds during the core pulling process are solved, and rapid automatic mold release and high efficiency yield of injection molding parts are achieved.
Patent Information
- Application Number
- CN202421938408.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-09
AI Technical Summary
Existing injection molds have low efficiency and low yield during core extraction, and manual operation leads to high costs and product damage.
An elastic-pressure secondary core extraction mold is designed, including the bottom plate, the lower mold and the upper mold. The automatic disengagement of the core extraction mold is achieved through guide columns and elastic limit parts, simplifying the core extraction process.
It realizes rapid and automatic mold release of injection molded parts, improves mold release efficiency and yield, and reduces mold cost and product damage.
Smart Images
Figure CN223045069U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molds, in particular to an elastic pressing type secondary core-pulling mold. Background Technique
[0002] Injection molding is a processing method used in mass production of certain components. The specific steps are to inject the heat-melted material into the mold cavity under high pressure, and after cooling and solidifying, the molded product is obtained. The core-pulling structure is used for the formation of the internal cavity of the product. For some injection molded parts with an inclined plate provided with an inclined hole, such as a safety protection plate, the inner core in the inclined hole needs to be removed by core-pulling first before the injection molded part can be taken out. The previous mold was a manual mold, and the core-pulling part was taken out manually together with the injection molded product. For each product produced, the insert needs to be buckled off the product and then placed into the mold. This mold structure has low demolding efficiency, high manufacturing cost, and low yield. Therefore, this application proposes a secondary core-pulling mold to solve the above problems. Content of the Utility Model
[0003] In view of the existing problems, the utility model provides an elastic pressing type secondary core-pulling mold, which can effectively solve the problems put forward in the background technique.
[0004] To solve the above problems, the utility model adopts the following technical scheme:
[0005] An elastic pressing type secondary core-pulling mold, which includes a bottom plate, a lower mold and an upper mold. A mold cavity is formed between the lower mold and the upper mold. Guide posts are fixed on the bottom plate, and the guide posts are slidably connected to the lower mold and the upper mold. A first elastic limiting member is connected between the bottom plate and the lower mold, and the first elastic limiting member is used to limit the sliding distance of the lower mold relative to the bottom plate. A core-pulling mold is slidably connected to the lower mold, and the core-pulling mold is connected to the lower mold through a second elastic limiting member. Moreover, a locking block is fixed on the bottom plate. After the mold is closed, the core-pulling mold abuts against the locking block.
[0006] As a further scheme of the utility model: The guide posts are arranged in four and are located at the four corners of the bottom plate.
[0007] As a further scheme of the utility model: The lower mold and the upper mold are positioned through protrusions and grooves.
[0008] As a further scheme of the utility model: The first elastic limiting member includes a first limiting screw with a cap and a first spring. A limiting groove is opened on the bottom plate, and a first spring groove is opened on the lower mold. The first limiting bolt slides through the limiting groove and the bottom plate and then is fixedly connected to the lower mold. The first spring is arranged in the first spring groove, and both ends of the first spring are fixedly connected to the lower mold and the bottom plate respectively.
[0009] As a further solution of the utility model: The first elastic limiting member is provided with four and is distributed in a matrix.
[0010] As a further solution of the utility model: The core-pulling die is in a T shape and is inclined, a hole-forming die is arranged on the upper end surface of the core-pulling die, the second elastic limiting members are arranged on both sides of the core-pulling die, and the second elastic limiting members are connected with the lower die.
[0011] As a further solution of the utility model: The lower die is provided with a core-pulling groove, and the core-pulling die is slidably connected with the core-pulling groove.
[0012] As a further solution of the utility model: The second elastic limiting member includes a second limiting screw with a cap and a second spring. The second limiting screw slidably passes through the core-pulling die and is fixedly connected with the lower die. Second spring grooves are arranged on both sides of the core-pulling groove. The second spring is arranged in the second spring groove, and both ends of the second spring are fixedly connected with the lower die and the core-pulling die respectively.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: After the upper die is removed in the utility model, the first elastic limiting member pushes the lower die to slide relative to the bottom plate along the guide pillar, so that the core-pulling die moves away from the locking block, and the second elastic limiting member pushes the core-pulling die to slide, so that the core-pulling die is removed from the injection molded product, completing the rapid automatic demolding process of the injection molded product. The demolding efficiency is high, the damage to the product is reduced, the yield is high, the structure is simple, the mold cost is low, the design is reasonable, the core can be automatically shrunk and pulled out, the whole core-pulling process is simple, easy to operate, and it is ensured that the product can be smoothly demolded. Description of the Drawings
[0014] Figure 1 It is a three-dimensional schematic diagram after the whole structure of an elastic pressing type secondary core-pulling mold is closed;
[0015] Figure 2 It is Figure 1 the plan view of;
[0016] Figure 3 It is Figure 2 the sectional view taken along A-A in;
[0017] Figure 4 It is Figure 2 the sectional view taken along B-B in;
[0018] Figure 5 It is Figure 2 the sectional view taken along C-C in;
[0019] Figure 6 It is a three-dimensional schematic diagram of the disassembled whole structure of an elastic pressing type secondary core-pulling mold;
[0020] Figure 7 It isFigure 6 Another perspective three-dimensional schematic diagram.
[0021] In the figure: 1, bottom plate; 2, lower die; 3, upper die; 4, injection molded part; 5, guide pillar; 6, first elastic limiting member; 61, first limiting screw; 62, first spring; 7, core-pulling die; 8, second elastic limiting member; 81, second limiting screw; 82, second spring; 9, locking block; 10, protrusion; 11, groove; 12, limiting groove; 13, first spring groove; 14, hole-forming die; 15, core-pulling groove; 16, second spring groove. Specific embodiments
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0023] Combined with Figures 1 to 7 To illustrate this embodiment, this embodiment provides a spring-loaded secondary core-pulling mold, which includes a bottom plate 1, a lower die 2 and an upper die 3. A mold cavity is formed between the lower die 2 and the upper die 3, and an injection molded part 4 is formed in the mold cavity. A guide pillar 5 is fixed on the bottom plate 1. The guide pillars 5 are provided in four and are located at the four corners of the bottom plate 1. The guide pillars 5 are slidably connected to the lower die 2 and the upper die 3. A first elastic limiting member 6 is connected between the bottom plate 1 and the lower die 2. The first elastic limiting member 6 is used to limit the sliding distance of the lower die 2 relative to the bottom plate 1. A core-pulling die 7 is slidably connected to the lower die 2. The core-pulling die 7 is connected to the lower die 2 through a second elastic limiting member 8. And a locking block 9 is fixed on the bottom plate 1. After the mold is closed, the core-pulling die 7 abuts against the locking block 9, and the locking block 9 is used to limit and fix the core-pulling die 7.
[0024] As Figure 6 、 7 shown, the lower die 2 and the upper die 3 are positioned by a protrusion 10 and a groove 11. Specifically, two protrusions 10 are provided on the right side of the lower die 2, and two grooves 11 are provided on the left side. Correspondingly, two grooves 11 are provided on the right side of the bottom surface of the upper die 3, and two protrusions 10 are provided on the left side. After the upper die 3 and the lower die 2 are closed, the protrusion 10 is inserted into the groove 11, thereby limiting and fitting the upper die 3 and the lower die 2 together, ensuring the accuracy of the mold cavity.
[0025] As Figure 3 、 4, as shown in Fig. 6, four first limit members are provided and distributed in a matrix, respectively arranged in the middle of the four sides of the bottom plate 1. The first elastic limit member 6 includes a first limit screw 61 with a cap and a first spring 62. A limit groove 12 is opened on the bottom plate 1, and a first spring groove 13 is opened on the lower mold 2. The first limit bolt slides through the limit groove 12 and the bottom plate 1 and then is fixedly connected to the lower mold 2. The first spring 62 is arranged in the first spring groove 13, and both ends of the first spring 62 are fixedly connected to the lower mold 2 and the bottom plate 1 respectively. When the mold is opened, the upper mold 3 moves upward with the wax injection device to separate from the product. The lower mold 2 moves upward along the guide post 5 under the action of the first spring 62. When it moves to the set mold opening distance, the cap on the first limit screw 61 abuts against the bottom plate 1, and the lower mold 2 stops moving.
[0026] As Figures 4 - 7 shown, the core-pulling mold 7 is T-shaped and is inclined. A hole-forming mold 14 is provided on the upper end surface of the core-pulling mold 7. Second elastic limit members 8 are arranged on both sides of the core-pulling mold, and the second elastic limit members 8 are connected to the lower mold 2. A core-pulling groove 15 is provided on the lower mold 2, and the core-pulling mold 7 is slidably connected to the core-pulling groove 15. The second elastic limit member 8 includes a second limit screw 81 with a cap and a second spring 82. The second limit screw 81 slides through the core-pulling mold 7 and then is fixedly connected to the lower mold 2. Second spring grooves 16 are provided on both sides of the core-pulling groove 15. The second spring 82 is arranged in the second spring groove 16, and both ends of the second spring 82 are fixedly connected to the lower mold 2 and the core-pulling mold 7 respectively. After the lower mold 2 stops moving, the core-pulling mold 7 moves away from the locking block 9, thereby unlocking the core-pulling mold 7. The second spring 82 acts on the core-pulling mold 7, so that the core-pulling mold 7 slides along the core-pulling groove 15, and the hole-forming mold 14 disengages from the injection molded part 4, completing the demolding. During the demolding process, the upward movement of the lower mold 2 and the movement of the core-pulling mold 7 are carried out simultaneously.
[0027] The working principle of the present utility model is: after the upper mold 3 is removed, the first elastic limit member pushes the lower mold 2 to slide relative to the bottom plate 1 along the guide post 5, so that the core-pulling mold 7 moves away from the locking block 9. The second elastic limit member 8 pushes the core-pulling mold 7 to slide, so that the core-pulling mold 7 disengages from the injection molded part 4 product, completing the rapid automatic demolding process of the injection molded part 4 product. The demolding efficiency is high, the damage to the product is reduced, the yield is high, the structure is simple, the mold cost is low, the design is reasonable, it can automatically retract the core and pull out the core, the whole core-pulling process is simple, easy to operate, and ensures that the product can be smoothly demolded.
[0028] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0029] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A spring-pressed secondary core-pulling mold, comprising a bottom plate, a lower mold and an upper mold, characterized in that: A mold cavity is formed between the lower mold and the upper mold, a guide column is fixed on the bottom plate, the guide column is slidably connected to the lower mold and the upper mold, a first elastic limiter is connected between the bottom plate and the lower mold, the first elastic limiter is used to limit the sliding distance of the lower mold relative to the bottom plate, a core pulling mold is slidably connected to the lower mold, the core pulling mold is connected to the lower mold by a second elastic limiter, and a locking block is fixed on the bottom plate, after the mold is closed, the core pulling mold abuts against the locking block.
2. The elastic pressure type secondary core pulling mold according to claim 1, characterized in that: The guide pillars are arranged in four numbers and are located at the four corners of the bottom plate.
3. The elastic pressure type secondary core pulling mold according to claim 1, characterized in that: The lower die and the upper die are positioned by protrusions and grooves.
4. The elastic pressure type secondary core pulling mold according to claim 1, characterized in that: The first elastic limiting member includes a first limiting screw with a cover cap and a first spring. The bottom plate is provided with a limiting groove, and the lower mold is provided with a first spring groove. The first limiting screw slides through the bottom plate from the limiting groove and is fixedly connected to the lower mold. The first spring is arranged in the first spring groove and the two ends of the first spring are respectively fixedly connected to the lower mold and the bottom plate.
5. A spring-pressed secondary core-pulling mold according to claim 1 or 4, characterized in that: The number of the first elastic limiting members is four and they are distributed in a matrix.
6. The elastic pressure type secondary core pulling mold according to claim 1, characterized in that: The core-pulling mold is T-shaped and tilted, a hole-forming mold is arranged on the upper end surface of the core-pulling mold, the second elastic limiter is arranged on both sides of the core-pulling mold, and the second elastic limiter is connected to the lower mold.
7. The elastic pressure type secondary core pulling mold according to claim 6, characterized in that: The lower die is provided with a core-pulling groove, and the core-pulling die is slidably connected with the core-pulling groove.
8. The elastic pressure type secondary core pulling mold according to claim 7, characterized in that: The second elastic limiting member includes a second limiting screw with a cover cap and a second spring. The second limiting screw slides through the core pulling mold and is fixedly connected to the lower mold. Second spring grooves are provided on both sides of the core pulling groove. The second spring is arranged in the second spring groove and the two ends of the second spring are respectively fixedly connected to the lower mold and the core pulling mold.