Multidirectional inclined demolding mechanism of household crack rice bucket injection mold
Through the multi-directional oblique mold release mechanism of household slit rice barrel injection mold, the cooperation of linear driver and adsorption rod is used to solve the problem of damage to the rice barrel during the mold release process, achieving a stable and simple mold release effect, and improving the product pass rate.
Patent Information
- Application Number
- CN202422270551.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-18
AI Technical Summary
During the demolding process of household rice barrels, due to the high adhesion force at the folded edges and patterns, traditional straight or oblique top methods are prone to damage the plastic parts, and the demolding process is complicated, resulting in a low product pass rate.
A multi-directional oblique mold release mechanism is adopted, including fixed templates, moving templates, core and joint modules. Through the cooperation of linear drivers and adsorption rods, the gradual inclination setting and stable mold release of the rice barrel molding cavity is achieved. Combined with the design of adsorption rods and sliding holes, the risk of damage to plastic parts is reduced.
A simple and stable mold release process is achieved, reducing the risk of damage to rice barrel plastic parts and improving product pass rate.
Smart Images
Figure CN223161275U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of injection molds, and particularly relates to a multi-directional oblique demolding mechanism for a household sandwich rice bucket injection mold. Background Art
[0002] Household rice buckets often have multiple flanges at the open end, and in order to sell, there are patterns with depressions or protrusions on the outer surface of the rice bucket. Therefore, in the demolding stage, these flanges and pattern areas cannot be removed by ordinary straight-out demolding methods. Moreover, the surface area of the injection-molded rice bucket is large and the adhesion force between the surface and the molding surface is also large. The way of ejecting with straight ejector rods and inclined ejector rods is very easy to damage the plastic parts, and it needs to be demolded multiple times or demolded in a specified direction to complete. Therefore, the process is complex and the precision requirement is high, which easily causes damage to the rice bucket plastic parts.
[0003] For example, the Chinese patent document discloses an injection mold for a trash can [Patent Application No.: CN2019287226.8], which includes a moving mold and a fixed mold. A mold core is provided on the moving mold, a mold cavity is provided on the fixed mold, and a cavity for forming the trash can is formed between the mold core and the mold cavity. A gate communicating with the mold cavity is provided on the side of the fixed mold opposite to the moving mold; a discharging assembly is provided at the root of the mold core on the moving mold. The discharging assembly is assembled to be able to eject the trash can on the mold core towards the direction of the fixed mold when the moving mold and the fixed mold are separated. However, because the length of the formed trash can is relatively high, the adhesion force between it and the inner wall of the forming cavity is very large. In the demolding process, using the traditional ejector rod ejecting method is very easy to cause the trash can to break, resulting in a reduction in the product qualification rate. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the above problems and provide a multi-directional oblique demolding mechanism for a household sandwich rice bucket injection mold.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A multi-directional oblique demolding mechanism for a household sandwich rice bucket injection mold includes a fixed template and a moving template. A mold core is provided on the moving template, and the mold core protrudes from the moving template. There are also two mold clamping blocks between the fixed template and the moving template. When the mold is clamped, a rice bucket forming cavity is formed among the fixed template, the mold core, and the two mold clamping blocks. The mold clamping block is connected with a linear driver. The rice bucket forming cavity is used to form the rice bucket frame part, which is gradually inclined outward from one end close to the fixed template to the other end. A plurality of adsorption rods are also provided in the fixed template. When the mold is clamped, the end of the adsorption rod coincides with the forming surface of the rice bucket forming cavity.
[0007] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, the moving template is provided with a recessed area, and the combined module extends into the recessed area. During mold closing, the combined module fits against the inner wall of the recessed area.
[0008] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, an abutting piece that fits against the inner wall of the recessed area is provided on the outer surface of the combined module extending into the recessed area.
[0009] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a rice bucket port forming block is provided at the end of the combined module away from the fixed template. A rice bucket port forming ring is provided on one side of the rice bucket port forming block close to the rice bucket forming cavity. During mold closing, the rice bucket port forming block fits against the inner wall of the recessed area, and the rice bucket port forming ring communicates with the rice bucket forming cavity.
[0010] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a rice bucket end bottom forming ring is provided on the side of the fixed template close to the moving template. The rice bucket end bottom forming ring extends into the fixed template in a direction away from the moving template and communicates with the rice bucket forming cavity during mold closing.
[0011] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a number of vertically arranged stripe grooves are provided on the side surface of the core.
[0012] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a number of slide holes corresponding to the adsorption rods are provided in the fixed template. The adsorption rods slide in the corresponding slide holes, and the diameter of the port of the slide hole close to the rice bucket forming cavity is larger than the diameter of the adsorption rod.
[0013] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a number of transverse grooves are also provided at the port of the slide hole close to the rice bucket forming cavity.
[0014] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a number of slide holes are respectively arranged at the edge of the rice bucket forming cavity.
[0015] In the above-mentioned multi-directional oblique demolding mechanism of the household gap rice bucket injection mold, a number of longitudinal cooling holes are provided in the core. The longitudinal cooling holes extend into the moving template. A number of transverse cooling holes are provided in the moving template. The transverse cooling holes penetrate the moving template, and each transverse cooling hole communicates with a longitudinal cooling hole.
[0016] Compared with the existing technology, the advantages of the present utility model are as follows:
[0017] 1. By moving the moving template and two combined modules, the most complex part of the rice bucket plastic part is disconnected, and the steps in this process are simple and it is not easy to damage the rice bucket plastic part.
[0018] 2. The combined module extends into the recessed area and fits against the inner wall of the recessed area. During the injection molding process, due to the high-pressure environment in the rice bucket molding cavity, a thrust force will be generated on the combined module. The combined module is clamped by the recessed area to prevent the combined module from shifting in position.
[0019] 3. During demolding, the adhesion force between the core and the plastic part is concentrated on the side part of the bucket molding cavity. Therefore, by arranging several sliding holes at the edge of the rice bucket molding cavity, demolding can be carried out more stably, preventing the rice bucket plastic part from falling off prematurely and causing damage to the rice bucket plastic part. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic diagram of the overall structure;
[0021] Figure 2 is Figure 1 a cross-sectional schematic diagram of;
[0022] Figure 3 is Figure 2 an enlarged schematic diagram of part A in;
[0023] Figure 4 is Figure 2 an enlarged schematic diagram of part B in;
[0024] Figure 5 is a flipping schematic diagram of the connection between the combined module and the rice bucket port forming block;
[0025] Figure 6 is a schematic diagram of the fixed template;
[0026] Figure 7 is a schematic diagram of the core.
[0027] In the figure: fixed template 10, moving template 11, core 12, combined module 13, rice bucket molding cavity 14, adsorption rod 15, recessed area 16, abutting piece 17, rice bucket port forming block 18, rice bucket port forming ring 19, rice bucket end bottom forming ring 20, stripe groove 21, sliding hole 22, transverse groove 23, longitudinal cooling hole 24, transverse cooling hole 25. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.
[0029] The present utility model provides a multi-directional oblique demolding mechanism for a household gap rice bucket injection mold, in combination with Figure 1-7As shown, it includes a fixed template 10 and a movable template 11. A core 12 is provided on the movable template 11, and the core 12 protrudes from the movable template 11. There are also two mold clamping blocks 13 between the fixed template 10 and the movable template 11. During mold clamping, a rice bucket forming cavity 14 is formed among the fixed template 10, the core 12, and the two mold clamping blocks 13. The mold clamping block 13 is connected to a linear driver. The rice bucket forming cavity 14 is used to form the rice bucket border part which is gradually inclined outward from one end close to the fixed template 10 to the other end. A number of suction rods 15 are also provided in the fixed template 10. During mold clamping, the end of the suction rod 15 coincides with the forming surface of the rice bucket forming cavity 14.
[0030] In this embodiment, during mold clamping, the fixed template 10, the movable template 11, and the two mold clamping blocks 13 are combined to form a rice bucket forming cavity 14 with the core 12. The injection liquid enters the rice bucket forming cavity 14 through the fixed template 10 for injection molding. After cooling, the movable template 11 first moves away from the fixed template 10. Since the rice bucket forming cavity 14 is used to form the rice bucket border part which is gradually inclined outward from one end close to the fixed template 10 to the other end, the core 12 can move away from the fixed template 10 along a straight line direction without bending or damaging the rice bucket plastic part during the process of disconnecting from the rice bucket plastic part. Then the two mold clamping blocks 13 move along a straight line distance in the direction away from each other, so that the two mold clamping blocks 13 are disconnected from the side of the rice bucket plastic part. Finally, the rice bucket plastic part adheres to the fixed template 10 through the suction rod 15 and the forming surface on the fixed template 10. After the movable template 11 and the mold clamping blocks 13 are completely disconnected from the rice bucket plastic part, the demolding work of the last movement of the suction rod 15 is carried out. Through the movement of the movable template 11 and the mold clamping blocks 13, the most complex part of the disconnection from the rice bucket plastic part is completed, and the steps are simple and it is not easy to damage the rice bucket plastic part during this process.
[0031] The movable template 11 is provided with a recessed area 16, and the mold clamping block 13 extends into the recessed area 16. During mold clamping, the mold clamping block 13 fits against the inner wall of the recessed area 16.
[0032] In this embodiment, during mold clamping, first, the two mold clamping blocks 13 are moved closer to each other and connected to the fixed template 10, and finally the movable template 11 is moved in the direction close to the fixed template 10, so that the mold clamping block 13 extends into the recessed area 16 and fits against the inner wall of the recessed area 16. During the injection process, since the inside of the rice bucket forming cavity 14 is a high-pressure environment, a thrust will be generated on the mold clamping block 13. The recessed area 16 clamps the mold clamping block 13 to prevent the mold clamping block 13 from shifting in position, improving the yield rate.
[0033] The outer surface of the mold clamping block 13 extending into the recessed area 16 is provided with a counter piece 17 that fits against the inner wall of the recessed area 16.
[0034] In this embodiment, the abutting piece 17 has the ability to deform and a part of it is arranged inside the combining module 13. The abutting piece 17 is used to increase the frictional force between the combining module 13 and the inner wall of the recessed area 16, and also prevent abrasion between the combining module 13 and the recessed area 16 during the mold closing process.
[0035] A rice bucket port forming block 18 is provided at the end of the combining module 13 away from the fixed mold plate 10. A rice bucket port forming ring 19 is provided on one side of the rice bucket port forming block 18 close to the rice bucket forming cavity 14. During mold closing, the rice bucket port forming block 18 fits against the inner wall of the recessed area 16, and the rice bucket port forming ring 19 communicates with the rice bucket forming cavity 14.
[0036] In this embodiment, the rice bucket port forming ring 19 is used to form the hem at the open end of the rice bucket plastic part. This area has recessed, protruding and folded parts, and ordinary ejection methods are not easy to demold. Therefore, in this embodiment, demolding is carried out by moving the combining module 13 with the rice bucket port forming block 18 horizontally away from the rice bucket plastic part in a straight line direction, which will not distort or bend the plastic part, and the steps are simple.
[0037] A rice bucket end bottom forming ring 20 is provided on the side of the fixed mold plate 10 close to the moving mold plate 11. The rice bucket end bottom forming ring 20 extends into the fixed mold plate 10 in the direction away from the moving mold plate 11 and communicates with the rice bucket forming cavity 14 during mold closing.
[0038] In this embodiment, the rice bucket end bottom forming ring 20 is used to form the supporting part at the bottom of the rice bucket plastic part, and during the demolding process, the part of the rice bucket plastic part formed in the rice bucket end bottom forming ring 20 also increases the frictional force between the rice bucket plastic part and the fixed mold plate 10, further making the demolding process proceed in an orderly manner.
[0039] A number of vertically arranged stripe grooves 21 are provided on the side surface of the core 12.
[0040] In this embodiment, the stripe grooves 21 are used to form the patterns on the rice bucket plastic part. This part is demolded by moving the combining module 13 horizontally away from the rice bucket plastic part in a straight line direction, which will not distort or bend the plastic part, and the steps are simple.
[0041] A number of sliding holes 22 corresponding to the adsorption rods 15 are provided in the fixed mold plate 10. The adsorption rods 15 slide in the corresponding sliding holes 22, and the diameter of the port of the sliding hole 22 close to the rice bucket forming cavity 14 is larger than the diameter of the adsorption rod 15.
[0042] In this embodiment, the gap between the sliding hole 22 and the adsorption rod 15 is used to form the support columns at the bottom of the rice bucket plastic part. On the other hand, it also increases the friction force between the rice bucket plastic part and the fixed template 10, further enabling the demolding process to proceed in an orderly manner. When the rice bucket plastic part is completely disconnected from the moving template 11, the core 12 and the combined module 13, the adsorption rod 15 is connected to an external linear driver. The output shaft of the external linear driver passes through the fixed template 10 and is connected to the adsorption rod 15. The external linear driver works to push out the rice bucket plastic part to complete the final demolding work.
[0043] Several transverse grooves 23 are also provided at the port of the sliding hole 22 close to the rice bucket forming cavity 14.
[0044] In this embodiment, the transverse grooves 23 can form the support columns at the bottom of the rice bucket plastic part, and on the other hand, it also increases the friction force between the rice bucket plastic part and the fixed template 10, further enabling the demolding process to proceed in an orderly manner.
[0045] Several sliding holes 22 are respectively arranged at the edge of the rice bucket forming cavity 14.
[0046] In this embodiment, since the edge of the rice bucket forming cavity 14 corresponds to the side part of the rice bucket forming cavity 14, during demolding, the adhesion force with the core 12 is concentrated on the side part of the bucket forming cavity 14. Therefore, arranging several sliding holes 22 at the edge of the rice bucket forming cavity 14 can perform demolding more stably and prevent the rice bucket plastic part from falling off in advance, resulting in damage to the rice bucket plastic part.
[0047] Several longitudinal cooling holes 24 are provided in the core 12. The longitudinal cooling holes 24 extend into the moving template 11. Several transverse cooling holes 25 are provided in the moving template 11. The transverse cooling holes 25 penetrate through the moving template 11, and each transverse cooling hole 25 is communicated with a longitudinal cooling hole 24.
[0048] In this embodiment, the transverse cooling holes 25 can be connected to an external cooling water pipe. After injection molding, passing water can accelerate the cooling speed of the rice bucket plastic part and improve the demolding efficiency.
[0049] The working principle of the present utility model is as follows: When clamping the mold, two mold clamping blocks 13 approach and fit with each other under the operation of the linear driver connected thereto. Then, the moving template 11 moves towards the fixed template 10, so that the recessed area 16 fits with the mold clamping blocks 13 and the rice bucket port forming block 18. Finally, the fixed template 10, the moving template 11 and the two mold clamping blocks 13 are combined to form a rice bucket forming cavity 14 with the core 12 to complete the mold clamping step. Then, the injection liquid enters the rice bucket forming cavity 14 through the fixed template 10 for injection molding. After cooling, the moving template 11 first moves away from the fixed template 10. Since the rice bucket forming cavity 14 is used to form the border part of the rice bucket and is gradually inclined outward from one end close to the fixed template 10 to the other end, when the core 12 moves away from the fixed template 10 along a straight line and disconnects from the rice bucket plastic part, the rice bucket plastic part will not be bent or damaged. Then, the two mold clamping blocks 13 move away from each other along a straight line distance, so that the two mold clamping blocks 13 disconnect from the side of the rice bucket plastic part. Finally, the rice bucket plastic part adheres to the fixed template 10 through the suction rod 15 and the forming surface on the fixed template 10. Finally, the suction rod 15 is connected to an external linear driver. The output shaft of the external linear driver penetrates the fixed template 10 and is connected to the suction rod 15. The external linear driver works to eject the rice bucket plastic part to complete the final demolding work.
[0050] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
[0051] Although terms such as fixed template 10, moving template 11, core 12, mold clamping block 13, rice bucket forming cavity 14, suction rod 15, recessed area 16, abutting piece 17, rice bucket port forming block 18, rice bucket port forming ring 19, rice bucket end bottom forming ring 20, stripe groove 21, sliding hole 22, transverse groove 23, longitudinal cooling hole 24, transverse cooling hole 25, etc. are used more in this article, using these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.
Claims
1. A multi-directional oblique demoulding mechanism for an injection mould of a household gap rice bucket, comprising a fixed template (10) and a movable template (11), characterized in that, The movable template (11) is provided with a core (12), the core (12) protrudes from the movable template (11), and there are also two mold clamping blocks (13) between the fixed template (10) and the movable template (11). During mold clamping, a rice bucket forming cavity (14) is formed between the fixed template (10), the core (12) and the two mold clamping blocks (13). The mold clamping block (13) is connected with a linear actuator. The rice bucket forming cavity (14) is used for forming the border part of the rice bucket, which is gradually inclined outward from one end close to the fixed template (10) to the other end. The fixed template (10) is also provided with a plurality of adsorption rods (15). During mold clamping, the end of the adsorption rod (15) coincides with the forming surface of the rice bucket forming cavity (14).
2. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 1, characterized in that, The movable template (11) is provided with a recessed area (16), and the mold clamping block (13) extends into the recessed area (16). During mold clamping, the mold clamping block (13) fits against the inner wall of the recessed area (16).
3. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 2, characterized in that, The outer surface of the mold clamping block (13) extending into the recessed area (16) is provided with a pressing piece (17) that fits against the inner wall of the recessed area (16).
4. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 2, wherein, The end of the mold clamping block (13) far from the fixed template (10) is provided with a rice bucket port forming block (18). On the side of the rice bucket port forming block (18) close to the rice bucket forming cavity (14), there is a rice bucket port forming ring (19). During mold clamping, the rice bucket port forming block (18) fits against the inner wall of the recessed area (16), and the rice bucket port forming ring (19) communicates with the rice bucket forming cavity (14).
5. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 1, characterized in that, On the side of the fixed template (10) close to the movable template (11), there is a rice bucket end bottom forming ring (20). The rice bucket end bottom forming ring (20) extends into the fixed template (10) in a direction away from the movable template (11) and communicates with the rice bucket forming cavity (14) during mold clamping.
6. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 1, characterized in that, The side surface of the core (12) is provided with a number of vertically arranged stripe grooves (21).
7. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 1, wherein, The fixed template (10) is provided with a number of sliding holes (22) corresponding to the adsorption rods (15). The adsorption rods (15) slide in the corresponding sliding holes (22), and the diameter of the port of the sliding hole (22) close to the rice bucket forming cavity (14) is larger than the diameter of the adsorption rod (15).
8. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 7, characterized in that, A number of transverse grooves (23) are also provided at the port of the sliding hole (22) close to the rice bucket forming cavity (14).
9. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 8, characterized in that, A number of sliding holes (22) are respectively arranged at the edge of the rice bucket forming cavity (14).
10. The multi-directional oblique demolding mechanism of the household gap rice bucket injection mold according to claim 1, characterized in that, The core (12) is provided with a number of longitudinal cooling holes (24). The longitudinal cooling holes (24) extend into the movable template (11). The movable template (11) is provided with a number of transverse cooling holes (25). The transverse cooling holes (25) penetrate through the movable template (11), and each transverse cooling hole (25) communicates with a longitudinal cooling hole (24).