Mold structure for injection molding of special-shaped fastener
By introducing a combination design of inclined ejector components and guide blocks into the injection mold, the molding and demolding problems of irregular fasteners were solved, enabling normal injection molding production of irregular fasteners, simplifying the mold structure, reducing processing difficulty and cost, and improving customer satisfaction.
Patent Information
- Application Number
- CN202422938610.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing injection molds cannot effectively form and demold irregularly shaped fasteners, resulting in complex mold structures, difficult processing, high costs, and low customer satisfaction.
Design a mold structure including a front mold core, a rear mold core, a core-pulling assembly, and an ejector assembly. Utilize the cooperation of the ejector rod and guide block to achieve correct injection molding and demolding of irregularly shaped fasteners. Through the design of the inclined guide rail and guide hole of the ejector assembly, the vertical and lateral movement of the ejector rod can be realized, simplifying the demolding process.
It enables normal injection molding production of irregularly shaped fasteners, reduces the complexity of the demolding mechanism, improves production efficiency and customer satisfaction, and saves production costs.
Smart Images
Figure CN223573724U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of injection mold, especially to a mold structure for injection molding of special-shaped fasteners. BACKGROUND
[0002] The design of the mold needs to be based on the specific structure of the product, and in the design process of the mold, various types of reverse buckles on the product are often encountered, which makes it necessary to determine whether to use a slanting ejection mechanism or a core-pulling mechanism to form the reverse buckle according to the structure of the reverse buckle, and to determine the demolding mode and direction between the formed reverse buckle and the formed element.
[0003] However, the existing slanting ejection mechanism or core-pulling mechanism can only achieve the demolding of the conventional shape of the formed element, so that the existing injection mold can only realize the molding of reverse buckles with a single shape, resulting in the fact that when some special-shaped fasteners are combined with injection products, the existing injection mold cannot complete the demolding of the product.
[0004] However, the existing slanting ejection mechanism cannot achieve the demolding of the reverse buckle combination with special-shaped fasteners, so when designing the injection mold for injection products, it is recommended that the customer modify the injection mold, which reduces the customer's satisfaction.
[0005] Alternatively, due to the structural requirements of the special-shaped fasteners, the product is difficult to demold, and the demolding position of the mold is limited, so a special demolding mechanism needs to be set up on the mold to demold the product, but the setting of the special demolding mechanism will make the structure of the mold complex, difficult to process, and high in manufacturing cost.
[0006] Therefore, it is necessary to make further improvements. INVENTION CONTENTS
[0007] The utility model aims at providing a technical scheme that can solve the above problems.
[0008] The utility model provides a mold structure for injection molding of special-shaped fasteners, which comprises a front mold core, a rear mold core and a core-pulling assembly that cooperate with each other and enclose an injection cavity, the injection cavity is used for injection molding of corresponding plastic products, the plastic products are provided with special-shaped fasteners, one end of the special-shaped fasteners is fixedly connected to the plastic products, and the other end is provided with a reverse buckle part, and the mold structure further comprises a slanting ejection assembly that is used for injection molding of the reverse buckle part of the plastic products.
[0009] As a further scheme of the utility model, the slanting ejection assembly is provided with a slanting ejection rod and a guide block, the guide block is fixedly connected to the front mold core and is sleeved on the slanting ejection rod, so that when the front mold core moves, the guide block can drive the slanting ejection rod to move synchronously perpendicularly to the moving direction of the front mold core.
[0010] As a further scheme of the utility model: the guide block is equipped with a guide hole, a certain angle of inclination is equipped between the axis of the guide hole and the mold opening direction, the guide block is sleeved on the inclined ejector rod through the guide hole, so that the movement of the guide block can drive the end of the inclined ejector rod perpendicular to the guide block to move horizontally.
[0011] As a further scheme of the utility model: the inclined ejector assembly is also equipped with an inclined ejector seat, one end of the inclined ejector rod is slidably connected to the inclined ejector seat, and the other end is equipped with a forming part, and the forming part is used for forming the undercut part of the plastic product.
[0012] As a further scheme of the utility model: the inclined ejector seat is equipped with an inclined guide groove, and one end of the inclined ejector rod connected to the inclined ejector seat is equipped with an inclined guide rail, the inclined guide rail and the inclined guide groove are embedded with each other to form a sliding connection.
[0013] As a further scheme of the utility model: the cross-sectional shape of the inclined guide groove and the inclined guide rail is respectively arranged as T-shaped, so that they can be embedded with each other.
[0014] As a further scheme of the utility model: it also includes a front mold auxiliary seat, the front mold auxiliary seat is fixedly connected to the front mold frame, one end of the inclined ejector seat is fixedly connected to the front mold auxiliary seat, and the other end is slidably connected to the inclined ejector rod.
[0015] As a further scheme of the utility model: the front mold auxiliary seat is equipped with a first guide column and a first guide sleeve, one end of the first guide column abuts against the front mold core, and the other end penetrates the first guide sleeve, so as to guide and limit the front mold auxiliary seat.
[0016] As a further scheme of the utility model: the front mold auxiliary seat is also equipped with an auxiliary rod, the front mold core is equipped with an auxiliary hole, one end of the auxiliary rod is fixedly connected to the rear mold core, and the other end penetrates the auxiliary hole and is fixedly connected to the front mold auxiliary seat, so as to assist and guide the movement of the front mold core.
[0017] Compared with the prior art, the utility model has the advantages that:
[0018] 1. By setting the front mold auxiliary seat at the part of the front mold frame, the inclined ejector assembly can be arranged at the front mold part to form the front mold inclined ejector structure, so that the abnormal shaped fastener can be normally injection molded, the complexity of the demolding mechanism is reduced, the abnormal shaped fastener of the injection molded product can be injection molded, the processing difficulty is reduced, the production cost is saved, and the customer satisfaction is improved.
[0019] 2、Still utilize the guide block and cooperate with the front die core, make the front die core can move a certain distance in the mold opening process, make its drive guide block to the inclined top rod, make it move a certain distance perpendicular to the mold opening direction, from the position of the special-shaped fastener, correct demolding, thereby optimizing the process of injection molding production, improve the production efficiency.
[0020] Therefore, through the above improvement, the mold structure for injection molding of the special-shaped fastener can be provided, the injection mold can complete the correct injection molding production of the special-shaped fastener, the demolding structure is simple, the processing difficulty can be reduced, the production efficiency can be improved, the production cost can be saved, and the customer satisfaction can be improved.
[0021] The additional aspects and advantages of the present application will be given in part in the following description, and part will become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0023] Figure 1 is the structure schematic view of the front die core and the rear die core of the present application;
[0024] Figure 2 is the cross-sectional schematic view of the inclined top rod and the guide block of the present application;
[0025] Figure 3 is the cross-sectional schematic view of the guide hole and the inclined guide groove of the present application;
[0026] Figure 4 is the cross-sectional schematic view of the mold opening state of the present application;
[0027] Figure 5 is Figure 4 the local enlarged schematic view of A in the figure;
[0028] Figure 6 is the cross-sectional schematic view of the auxiliary rod and the first guide column of the present application;
[0029] Figure 7 is the structure schematic view of the special-shaped fastener of the present application.
[0030] The reference signs and names in the figure are as follows:
[0031] 10 front mold core; 11 auxiliary hole; 12 rear mold core; 13 injection cavity; 20 inclined top assembly; 21 inclined top rod; 22 inclined guide rail; 23 forming part; 24 forming groove; 25 guide block; 26 guide hole; 27 inclined top seat; 28 inclined guide groove; 30 front mold auxiliary seat; 31 wear plate; 32 first guide column; 33 first guide sleeve; 34 auxiliary rod; 40 plastic product; 41 special-shaped fastener; 42 reverse buckle part; 43 reinforcing rib. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0033] Please refer to Figures 1 to 7 In the embodiments of the present application, a mold structure for injection molding of a special-shaped fastener 41 comprises a front mold core 10, a rear mold core 12 and a core-pulling assembly (not shown in the figure) which cooperate with each other to form an injection cavity 13, the injection cavity 13 is used for injection molding of a corresponding plastic product 40, the plastic product 40 is provided with the special-shaped fastener 41, one end of the special-shaped fastener 41 is fixedly connected to the plastic product 40, and the other end of the special-shaped fastener 41 is provided with a reverse buckle part 42; and the mold structure further comprises an inclined top assembly 20, the inclined top assembly 20 is used for injection molding of the reverse buckle part 42 of the plastic product 40.
[0034] Specifically, since one end of the plastic product 40 is provided with the special-shaped fastener 41, the special-shaped fastener 41 needs to be deformed to a certain extent on the basis of maintaining elasticity, so as to realize buckling of external materials. Therefore, one end of the special-shaped fastener 41 needs to be fixedly connected to the plastic product 40, and the other end of the special-shaped fastener 41 needs to form a free end. Moreover, the position of the free end which faces the external materials and needs to be buckled also needs to be provided with a corresponding reverse buckle part 42, so that the reverse buckle part 42 can be buckled to the external materials.
[0035] Therefore, the reverse buckle part 42 needs to be extended to a certain length in the direction of the external materials, so that the reverse buckle part 42 can be buckled to the external materials. In order to enhance the structural strength of the reverse buckle part 42, a reinforcing rib 43 can also be arranged at the curved part of the reverse buckle part 42. Since part of the rear mold assembly needs to be formed and arranged at other parts of the reverse buckle part 42, the forming of the reverse buckle part 42 needs to be arranged with a front mold inclined top. That is, the corresponding inclined top assembly 20 is arranged at part of the front mold assembly, and since the front mold part does not have a needle part, the front mold auxiliary seat 30 needs to be arranged to assist the inclined top assembly 20, so that the inclined top assembly 20 can correctly realize the effect of injection molding of the reverse buckle part 42.
[0036] Therefore, the injection mold can complete the correct injection production of the special-shaped fastener 41, the demolding structure is simple, the processing difficulty can be reduced, the production efficiency can be improved, the production cost can be saved, and customer satisfaction can be improved.
[0037] As Figures 1 to 4 shown, preferably, the inclined ejector assembly 20 is provided with an inclined ejector rod 21 and a guide block 25, the guide block 25 is fixedly connected to the front mold core 10 and is sleeved on the inclined ejector rod 21, so that when the front mold core 10 moves, the inclined ejector rod 21 can be driven through the guide block 25 to move synchronously perpendicular to the moving direction of the front mold core 10.
[0038] Specifically, in order to enable the inclined ejector rod 21 to move horizontally perpendicular to the mold opening direction, the guide block 25 needs to be provided and sleeved on the inclined ejector rod 21, so that when following the front mold core 10 to move in the mold opening direction, the inclined ejector rod 21 can also be driven to move horizontally. Thus, the forming portion 23 can be correctly demolded from the undercut portion 42 to complete the injection molding of the undercut portion 42.
[0039] As Figure 3 shown, preferably, the guide block 25 is provided with a guide hole 26, the axis of the guide hole 26 and the mold opening direction are provided with a certain inclination angle, and the guide block 25 is sleeved on the inclined ejector rod 21 through the guide hole 26, so that the movement of the guide block 25 can drive the inclined ejector rod 21 to move horizontally perpendicular to the direction of one end of the guide block 25.
[0040] Specifically, in order to drive the inclined ejector rod 21 horizontally, the guide hole 26 can also be provided with a certain inclination angle, so that in the mold opening direction, the inclined ejector rod 21 can be driven to move horizontally.
[0041] As Figures 4 to 7 shown, preferably, the inclined ejector assembly 20 is also provided with an inclined ejector seat 27, one end of the inclined ejector rod 21 is slidingly connected to the inclined ejector seat 27, and the other end of the inclined ejector rod 21 is provided with the forming portion 23, and the forming portion 23 is used for forming the undercut portion 42 of the plastic part product 40.
[0042] Specifically, in order to perform the forming operation on the undercut portion 42, the forming portion 23 can also be arranged at one end of the inclined ejector rod 21. In order to optimize the forming of the reinforcing rib 43, the corresponding forming groove 24 needs to be arranged on the forming portion 23, and the forming groove 24 is used for performing the forming operation on the reinforcing rib 43 of the undercut portion 42.
[0043] As Figure 1 , Figure 2 , Figure 3 and Figure 6The inclined top seat 27 is provided with an inclined guide groove 28, and the inclined top rod 21 is connected to one end of the inclined top seat 27 and provided with an inclined guide rail 22, the inclined guide rail 22 and the inclined guide groove 28 are embedded with each other to form a sliding connection. The cross-sectional shape of the inclined guide groove 28 and the inclined guide rail 22 is T-shaped, so that they can be embedded with each other.
[0044] Specifically, in order to better guide the inclined top rod 21, and in the mold opening process, the front mold auxiliary seat 30 can drive the inclined top rod 21, and the corresponding inclined top seat 27 can also be provided, and the inclined guide groove 28 is arranged at the appropriate position of the inclined top seat 27, and the inclined top rod 21 is provided with the inclined guide rail 22, and the two are embedded with each other to realize sliding connection, and the inclined top rod 21 can also be operated.
[0045] As shown in Figures 1 to 4 , preferably, the front mold auxiliary seat 30 is further provided, the front mold auxiliary seat 30 is fixedly connected to the front mold frame, one end of the inclined top seat 27 is fixedly connected to the front mold auxiliary seat 30, and the other end is slidably connected to the inclined top rod 21.
[0046] Specifically, the front mold auxiliary seat 30 can assist the inclined top assembly 20, so that the front mold frame (not shown in the figure) can operate the inclined top rod 21 to realize the mold structure of the front mold.
[0047] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 6 , preferably, the front mold auxiliary seat 30 is provided with a first guide column 32 and a first guide sleeve 33, one end of the first guide column 32 abuts against the front mold core 10, and the other end penetrates the first guide sleeve 33, thereby guiding and limiting the front mold auxiliary seat 30. The front mold auxiliary seat 30 is also provided with an auxiliary rod 34, the front mold core 10 is provided with an auxiliary hole 11, one end of the auxiliary rod 34 is fixedly connected to the rear mold core 12, the other end penetrates the auxiliary hole 11 and is fixedly connected to the front mold auxiliary seat 30, thereby assisting and guiding the movement of the front mold core 10.
[0048] Specifically, in order to further optimize the movement of the inclined top assembly 20, the corresponding guide column and guide sleeve can also be provided to guide the movement of the front mold auxiliary seat 30. The auxiliary rod 34 can guide and limit the movement of the front mold core 10, so that the inclined top assembly 20 can be better driven in the mold opening and closing process.
[0049] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and are non-limiting, the scope of the present application being defined by the appended claims rather than by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims
1. A mold structure for injection molding irregularly shaped fasteners, characterized in that, The assembly includes a front mold core (10), a rear mold core (12), and a core-pulling assembly that work together to form an injection cavity (13). The injection cavity (13) is used to injection mold the corresponding plastic part (40). The plastic part (40) is provided with a special-shaped fastener (41). One end of the special-shaped fastener (41) is fixed to the plastic part (40), and the other end is provided with an undercut (42). The assembly also includes a slanted ejector assembly (20), which is used to injection mold the undercut (42) of the plastic part (40).
2. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The inclined ejector assembly (20) is provided with an inclined ejector rod (21) and a guide block (25). The guide block (25) is fixed to the front mold core (10) and sleeved on the inclined ejector rod (21). When the front mold core (10) moves, the inclined ejector rod (21) can be driven by the guide block (25) so that the inclined ejector rod (21) moves synchronously with the moving direction of the front mold core (10).
3. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The guide block (25) is provided with a guide hole (26). The axis of the guide hole (26) is inclined at a certain angle to the mold opening direction. The guide block (25) is sleeved on the inclined push rod (21) through the guide hole (26), so that the movement of the guide block (25) can drive the inclined push rod (21) to move laterally in a direction perpendicular to one end of the guide block (25).
4. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The inclined top assembly (20) is also provided with an inclined top seat (27), one end of the inclined top rod (21) is slidably connected to the inclined top seat (27), and the other end is provided with a molding part (23), which is used to mold the undercut part (42) of the plastic product (40).
5. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The inclined top seat (27) is provided with an inclined guide groove (28), and the inclined top rod (21) is connected to one end of the inclined top seat (27) with an inclined guide rail (22). The inclined guide rail (22) and the inclined guide groove (28) are fitted together to form a sliding connection.
6. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The cross-sectional shapes of the inclined guide groove (28) and the inclined guide rail (22) are respectively set to T-shape, so that the two can be fitted together.
7. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, It also includes a front mold auxiliary seat (30), which is fixed to the front mold frame. One end of the inclined ejector seat (27) is fixed to the front mold auxiliary seat (30), and the other end is slidably connected to the inclined ejector rod (21).
8. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The front mold auxiliary seat (30) is provided with a first guide post (32) and a first guide sleeve (33). One end of the first guide post (32) abuts against the front mold core (10), and the other end passes through the first guide sleeve (33), thereby guiding and limiting the front mold auxiliary seat (30).
9. The mold structure for injection molding irregularly shaped fasteners according to claim 1, characterized in that, The front mold auxiliary seat (30) is also provided with an auxiliary rod (34). The front mold core (10) is provided with an auxiliary hole (11). One end of the auxiliary rod (34) is fixed to the rear mold core (12), and the other end passes through the auxiliary hole (11) and is fixed to the front mold auxiliary seat (30), thereby providing auxiliary guidance for the movement of the front mold core (10).