Multidirectional core-pulling injection mold for complex multi-characteristic thin-wall plastic shell
By designing a multi-directional core-pull injection mold for complex multi-character thin-walled plastic shell, the deformation problems caused by cooling and shrinkage during the injection molding process of thin-walled plastic parts are solved, and low-cost, efficient production and high-quality plastic parts manufacturing are achieved.
Patent Information
- Application Number
- CN202421626180.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-10
AI Technical Summary
In the prior art, complex thin-walled plastic parts are prone to deformation due to cooling and shrinkage during injection molding production, which increases the processing difficulty and production cost of the mold and affects production efficiency.
A complex multi-directional core extraction injection mold of a thin-walled plastic shell is designed, including a fixed mold base, a fixed mold plate, a mold groove, a casting port and annular array. Combined with the moving mold assembly, a core extraction slider, an inclined guide column, a return spring and a mold release unit, the core extraction mechanism is freely installed to meet the needs of complex structures, avoiding plastic entering the uninstalled core extraction groove, and ensuring the stability of mold closing and smooth mold release.
It effectively reduces the production cost of complex multi-feature thin-walled plastic shells, improves production efficiency and parts quality, avoids plastic waste and deformation, and ensures the continuous production of plastic parts.
Smart Images
Figure CN223161286U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic production, in particular to a multi-directional core-pulling injection mold for a complex multi-feature thin-wall plastic shell. Background Art
[0002] A mold is various molds and tools used in industrial production to obtain required products by injection molding, blow molding, extrusion, die casting, forging, smelting, stamping and other methods. In short, a mold is a tool for making formed articles. Such a tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the external shape of an article by changing the physical state of the formed material.
[0003] In the prior art, for thin-wall plastic parts with complex structures, due to factors such as cooling and shrinkage during the injection molding production process, deformation is likely to occur, resulting in high requirements for the mold core and cavity of thin-wall plastic parts with complex structures, increasing the processing difficulty of the processing mold for plastic parts, affecting the production efficiency of the mold, thus increasing the production cost of plastic parts and affecting the production of plastic parts. Summary of the Utility Model
[0004] In view of the deficiencies existing in the prior art, the purpose of the utility model is to provide a multi-directional core-pulling injection mold for a complex multi-feature thin-wall plastic shell, so as to solve the technical problems mentioned in the above background art.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions:
[0006] A multi-directional core-pulling injection mold for a complex multi-feature thin-wall plastic shell includes a fixed mold base. A fixed mold plate is fixedly connected to the top of the fixed mold base. A mold cavity is opened on the top of the fixed mold plate. A pouring port communicating with the mold cavity is arranged at the bottom of the fixed mold base. A plurality of groups of core-pulling mechanisms are annularly and arrayedly arranged outside the mold cavity. A moving mold assembly is arranged above the fixed mold plate.
[0007] Furthermore, the core-pulling mechanism includes a core-pulling slider, an inclined guide post and a return spring. A plurality of core-pulling grooves communicating with the mold cavity are opened on the top of the fixed mold plate. The inner bottom wall of the core-pulling groove is fixedly connected with an inclined guide post. The outer side wall of the inclined guide post is slidably sleeved with a core-pulling slider. A spring groove is opened at the bottom of the core-pulling slider and is fixedly connected with a return spring.
[0008] Furthermore, two inner walls on one side of the core-pulling groove close to the mold cavity are both concavely formed with limiting grooves and are slidably connected with limiting blocks. A blocking block is fixedly connected between the two limiting blocks. The outer wall of the blocking block close to the mold cavity is smoothly transitioned with the inner side wall of the mold cavity.
[0009] Further, the moving die assembly includes a moving die base, a moving die plate, a die core, and a demolding unit. The top of the fixed die plate is fixedly connected to the moving die base through support columns. The support columns are slidably connected to the moving die plate between the moving die base and the fixed die plate. The bottom of the moving die plate is fixedly connected to a die core for inserting into the mold cavity. The top of the moving die plate is provided with a demolding unit. An avoidance groove for avoiding the angled guide pillar is formed on the outer side wall of the moving die plate.
[0010] Further, the demolding unit includes a thimble, a limit ring, and a support spring. A communicating chute is formed between the moving die plate and the die core. The limit ring is slidably connected in the chute. A support spring is arranged between the bottom of the limit ring and the chute. The middle part of the limit ring is fixedly connected to a thimble.
[0011] Further, the bottom of the thimble penetrates through the die core and is flush with the bottom of the die core. The top of the thimble penetrates through the moving die plate and extends above the moving die plate.
[0012] In summary, the present utility model includes at least one of the following beneficial technical effects:
[0013] 1. For this multi-directional core-pulling injection mold for complex multi-feature thin-walled plastic shells, by arranging a plurality of core-pulling mechanisms on the top of the fixed die plate, the thin-walled plastic parts can be freely equipped with core-pulling mechanisms according to the requirements of outer wall reinforcing ribs, protrusions, etc. during the production process. Thus, when producing complex multi-feature thin-walled plastic shells, the multi-directional core-pulling injection mold does not need to be customized separately, which can effectively reduce costs and improve the production efficiency of plastic parts.
[0014] 2. For this multi-directional core-pulling injection mold for complex multi-feature thin-walled plastic shells, the arranged stop blocks can be used for the core-pulling grooves without installed core-pulling mechanisms, so as to prevent plastic from entering the core-pulling grooves due to the lack of obstruction of the core-pulling mechanisms, which not only causes waste but also leads to the scrapping of plastic parts, and can effectively ensure the production quality of plastic parts of the multi-directional core-pulling injection mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0016] Figure 1 It is a schematic structural diagram of a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0017] Figure 2Schematic diagram of the structure of the core-pulling mechanism that is not fully filled in the fixed template of a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0018] Figure 3 Schematic diagram of the internal structure of a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0019] Figure 4 Schematic diagram of the injection structure of a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0020] Figure 5 Schematic diagram of the structure of the fixed template in a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0021] Figure 6 Schematic diagram of the structure of the demolding unit in a multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell of the present utility model.
[0022] In the figure, 1 is the fixed mold base; 2 is the fixed template; 3 is the mold cavity; 4 is the pouring gate; 5 is the core-pulling mechanism; 51 is the core-pulling slider; 52 is the inclined guide pillar; 53 is the return spring; 6 is the moving mold assembly; 61 is the moving mold base; 62 is the moving template; 63 is the mold core; 64 is the demolding unit; 641 is the ejector pin; 642 is the limit ring; 643 is the support spring; 7 is the core-pulling groove; 8 is the limit groove; 9 is the limit block; 10 is the stop block; 11 is the avoidance groove; 12 is the sliding groove. Specific implementation mode
[0023] The following further elaborates on the present utility model in conjunction with the attached drawings.
[0024] Example:
[0025] Refer to Figure 1 - Figure 6 A multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic shell disclosed by the present utility model includes a fixed mold base 1. The top of the fixed mold base 1 is fixedly connected with a fixed template 2. The top of the fixed template 2 is provided with a mold cavity 3. The bottom of the fixed mold base 1 is provided with a pouring gate 4 communicating with the mold cavity 3. A plurality of groups of core-pulling mechanisms 5 are arranged in a circular array outside the mold cavity 3. A moving mold assembly 6 is arranged above the fixed template 2.
[0026] In this embodiment, when in use, as Figure 4 shown, the moving mold assembly 6 is pressed down to close the moving mold assembly 6 and the fixed template 2, so as to form a cavity for shaping in the mold cavity 3. Subsequently, the plastic melt is injected into the cavity through the pouring gate 4 in the fixed mold base 1, and the plastic is cooled and shaped by the cavity to complete the production of the thin-walled plastic.
[0027] After the thin-walled plastic is shaped, the moving die assembly 6 is lifted to separate the moving die assembly 6 from the fixed template 2. When the moving die assembly 6 rises to the highest position, the plastic part is ejected to realize the demolding of the plastic part. Subsequently, the moving die assembly 6 and the fixed template 2 are closed again, and the plastic parts can be continuously produced.
[0028] When there is a need for thin-walled ribs and protrusions on the plastic part, as Figure 2 shown, the core-pulling mechanism 5 can be installed as required. When the moving die assembly 6 closes with the fixed template 2, the core-pulling mechanism 5 can be pressed down, so that the thin-walled plastic part has ribs, protrusions, etc. required by the demand after shaping. By freely installing the core-pulling mechanism 5, the multi-directional core-pulling injection mold can have more production methods for thin-walled parts, which can effectively improve the practicability of the multi-directional core-pulling injection mold.
[0029] In a further preferred embodiment of the present invention, as Figure 3 shown, the core-pulling mechanism 5 includes a core-pulling slider 51, an inclined guide pillar 52 and a return spring 53. A plurality of core-pulling grooves 7 communicating with the mold cavity 3 are opened at the top of the fixed template 2. The inner bottom wall of the core-pulling groove 7 is fixedly connected with an inclined guide pillar 52, and the outer side wall of the inclined guide pillar 52 is slidably sleeved with a core-pulling slider 51. A spring groove is opened at the bottom of the core-pulling slider 51, and a return spring 53 is fixedly connected thereto.
[0030] In this embodiment, by providing the inclined guide pillar 52, the movement of the core-pulling slider 51 can be assisted, so that the core-pulling slider 51 approaches the mold cavity 3 when being extruded by the moving die assembly 6. The provided return spring 53 can push the core-pulling slider 51 to reset during demolding, and then the core-pulling slider 51 is moved away from the plastic part to facilitate the demolding of the plastic part.
[0031] In a further preferred embodiment of the present invention, as Figure 3 and Figure 5 shown, two inner walls on one side of the core-pulling groove 7 close to the mold cavity 3 are both concave to form limit grooves 8 and are slidably connected with limit blocks 9. A stop block 10 is fixedly connected between the two limit blocks 9. The outer wall of the stop block 10 close to the mold cavity 3 is smoothly transitioned with the inner side wall of the mold cavity 3.
[0032] In this embodiment, because the core-pulling groove 7 is provided, when closing the mold, there will be a gap in the core-pulling groove 7 without the core-pulling mechanism 5 installed, so that the injected plastic will enter the core-pulling groove along the gap, resulting in waste of plastic, and the parts after cooling and shaping cannot be used, affecting the production of parts. Therefore, observe Figure 5It can be found that a limiting groove 8 is provided on the inner wall of one side of the core-pulling groove 7 close to the mold cavity 3, and a limiting block 9 is slidably connected in the limiting groove 8. A blocking block 10 is connected by the limiting block 9. When the limiting block 9 is inserted into the limiting groove 8, the blocking block 10 blocks the core-pulling groove 7, which can be used to prevent waste caused by plastic entering the core-pulling groove 7.
[0033] By setting the outer wall of the blocking block 10 to have a smooth transition with the inner wall of the mold cavity 3, the surface of the part can be made smoother after the part is shaped, which can effectively improve the surface quality of the part and thus improve the production quality of the part.
[0034] In a further preferred embodiment of the present invention, as Figure 3 shown, the moving die assembly 6 includes a moving die base 61, a moving die plate 62, a die core 63 and a demolding unit 64. The top of the fixed die plate 2 is fixedly connected to the moving die base 61 through a support column. The support column is slidably connected between the moving die base 61 and the fixed die plate 2 with a moving die plate 62. The bottom of the moving die plate 62 is fixedly connected to a die core 63 for inserting into the mold cavity 3. The top of the moving die plate 62 is provided with a demolding unit 64. An avoidance groove 11 for avoiding the inclined guide post 52 is provided on the outer side wall of the moving die plate 62.
[0035] In this embodiment, by providing the moving die base 61, the moving stroke of the moving die plate 62 can be restricted, which can prevent the moving die plate 62 from disengaging from the multi-directional core-pulling injection mold and make the use of the multi-directional core-pulling injection mold more stable.
[0036] By connecting a die core 63 to the bottom of the moving die plate 62, when the moving die plate 62 and the fixed die plate 2 are closed, the die core 63 and the mold cavity 3 can cooperate to form a shaping cavity for shaping the plastic part. Subsequently, when the moving die plate 62 is reset, the plastic part is demolded by the demolding unit 64 to realize the continuous production of the plastic part.
[0037] Since the inclined guide post 52 is fixedly connected to the fixed die plate 2, when the moving die plate 62 is pressed down, it will conflict with the inclined guide post 52 and affect the mold closing. Therefore, an avoidance groove 11 is provided on the outer side wall of the moving die plate 62 for avoiding the inclined guide post 52, so that the mold closing effect of the multi-directional core-pulling injection mold is better.
[0038] In a further preferred embodiment of the present invention, as Figure 6 shown, the demolding unit 64 includes a thimble 641, a limiting ring 642 and a support spring 643. A communicating chute 12 is provided between the moving die plate 62 and the die core 63. A limiting ring 642 is slidably connected in the chute 12. A support spring 643 is provided between the bottom of the limiting ring 642 and the chute 12. The middle of the limiting ring 642 is fixedly connected to a thimble 641.
[0039] In this embodiment, the ejector pin 641 provided can be used to push open the plastic part when the moving template 62 is reset, so that the plastic part is demolded. The limiting ring 642 provided on the outer wall of the ejector pin 641 can cooperate with the support spring 643 to drive the ejector pin 641 to reset, so as to prevent the ejector pin 641 from protruding out of the mold core 63 during the mold closing process, affecting the shaping of the plastic part, and effectively stabilizing the shaping effect of the plastic part.
[0040] In a further preferred embodiment of the present utility model, as Figure 4 shown, the bottom of the ejector pin 641 penetrates through the mold core 63 and is flush with the bottom of the mold core 63, and the top of the ejector pin 641 penetrates through the moving template 62 and extends above the moving template 62.
[0041] In this embodiment, by making the bottom of the ejector pin 641 penetrate through the mold core 63 and be flush with the bottom of the mold core 63, the ejector pin 641 will not protrude out of the mold core 63 during mold closing, so that the plastic part will not be deformed by the extrusion of the ejector pin 641 during shaping. By making the top of the ejector pin 641 protrude out of the moving template 62 and extend above the moving template 62, when the moving template 62 is reset, the top of the ejector pin 641 will first contact the moving die base 61, and then the ejector pin 641 will move downward relative to the moving template 62 under the extrusion of the moving die base 61, so that the bottom of the ejector pin 641 protrudes out of the mold core 63, so that the ejector pin 641 can push open the plastic part to achieve demolding when the moving template 62 is reset.
[0042] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing, comprising a fixed mold base (1), characterized in that, The top of the fixed mold base (1) is fixedly connected with a fixed mold plate (2). A mold cavity (3) is formed on the top of the fixed mold plate (2). A pouring port (4) communicating with the mold cavity (3) is arranged at the bottom of the fixed mold base (1). A plurality of core-pulling mechanisms (5) are arranged in an annular array on the outer side of the mold cavity (3). A moving mold assembly (6) is arranged above the fixed mold plate (2).
2. The multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing according to claim 1, wherein The core-pulling mechanism (5) includes a core-pulling slider (51), an inclined guide pillar (52) and a return spring (53). A plurality of core-pulling grooves (7) communicating with the mold cavity (3) are formed on the top of the fixed mold plate (2). The inclined guide pillar (52) is fixedly connected to the inner bottom wall of the core-pulling groove (7). The core-pulling slider (51) is slidably sleeved on the outer side wall of the inclined guide pillar (52). A spring groove is formed at the bottom of the core-pulling slider (51), and the return spring (53) is fixedly connected thereto.
3. The multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing according to claim 2, wherein Two inner walls on one side of the core-pulling groove (7) close to the mold cavity (3) are both recessed to form a limiting groove (8), and a limiting block (9) is slidably connected thereto. A blocking block (10) is fixedly connected between the two limiting blocks (9). The outer wall of the blocking block (10) on the side close to the mold cavity (3) is smoothly transitioned with the inner side wall of the mold cavity (3).
4. A multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing according to claim 2, characterized in that The moving mold assembly (6) includes a moving mold base (61), a moving mold plate (62), a mold core (63) and a demolding unit (64). The top of the fixed mold plate (2) is fixedly connected with the moving mold base (61) through a support column. The support column is slidably connected with the moving mold plate (62) between the moving mold base (61) and the fixed mold plate (2). The mold core (63) for inserting into the mold cavity (3) is fixedly connected to the bottom of the moving mold plate (62). The demolding unit (64) is arranged on the top of the moving mold plate (62). An avoidance groove (11) for avoiding the inclined guide pillar (52) is formed on the outer side wall of the moving mold plate (62).
5. The multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing according to claim 4, wherein, The demolding unit (64) includes a thimble (641), a limiting ring (642) and a support spring (643). A communicating chute (12) is formed between the moving mold plate (62) and the mold core (63). The limiting ring (642) is slidably connected in the chute (12). A support spring (643) is arranged between the bottom of the limiting ring (642) and the chute (12). The thimble (641) is fixedly connected to the middle of the limiting ring (642).
6. A multi-directional core-pulling injection mold for a complex multi-feature thin-walled plastic housing according to claim 5, characterized in that The bottom of the thimble (641) penetrates through the mold core (63) and is flush with the bottom of the mold core (63). The top of the thimble (641) penetrates through the moving mold plate (62) and extends above the moving mold plate (62).