Full-circumference R-angle plastic part forming mold convenient to demold
By employing a combination of double-sloping ejectors and straight push rods in the injection mold, the demolding problem of plastic parts with full circumference radius corners is solved, and a convenient demolding process is achieved.
Patent Information
- Application Number
- CN202423206238.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing injection molds make it difficult to achieve convenient demolding when producing plastic parts with full circumference radius.
The system employs a double-sloping ejector with opposing ejection directions and a straight push rod for ejection. Combined with the design of the push plate and the sloping ejector rod, it enables the demolding of plastic parts with full circumference radius.
It enables convenient demolding of plastic parts with full radius corners under the action of forces in different directions, solving the problem of difficult demolding in existing technologies.
Smart Images
Figure CN223644183U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molds, specifically a molding mold for plastic parts with full circumference radius that facilitates demolding. Background Technology
[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molds are a processing method used in the mass production of parts, mainly in the industrial field. The injection molding process involves injecting molten material under high pressure into the mold cavity, which then cools and solidifies to obtain the molded product. Based on molding characteristics, injection molds are classified into two types: thermosetting plastic molds and thermoplastic plastic molds.
[0003] Currently, in the process of producing plastic parts using injection molds, due to the special structure of R-angle plastic parts, it is difficult to easily demold plastic parts with full circumference R-angle. Therefore, this utility model provides a molding die for plastic parts with full circumference R-angle that facilitates demolding. Utility Model Content
[0004] The purpose of this invention is to provide a mold for molding plastic parts with full circumference R-angle that facilitates demolding, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a molding die for a plastic part with a full circumferential radius (R-angle) that facilitates demolding, comprising an upper mold plate and a lower mold plate. An upper mold base plate is connected to the upper end of the upper mold plate, and a lower mold plate is guided and installed on the lower side of the upper mold plate. An upper mold core and a lower mold core are respectively provided on the upper and lower mold plates. After the upper and lower mold cores are closed, an injection cavity for molding a plastic part with a full circumferential radius (R-angle) is formed. The R-angle formed by the injection cavity is located on its left, right, and rear sides. The lower mold base plate... A push plate is slidably connected to the plate. A first support seat and a second support seat are installed on the left and right sides of the upper surface of the push plate. A first inclined push block and a second inclined push block are slidably connected to the left and right sides of the bottom of the injection cavity. A first inclined push rod and a second inclined push rod are respectively connected to the bottom of the first inclined push block and the second inclined push block. The bottom of the first inclined push rod is slidably connected to the upper side of the first support seat laterally, and the bottom of the second inclined push rod is slidably connected to the upper side of the second support seat longitudinally. A straight push rod is connected to the upper side of the push plate, and the upper end of the straight push rod is located at the bottom of the injection cavity.
[0006] Preferably, a push plate fixing plate is bolted to the upper side of the push plate, and both the first support seat and the second support seat extend to the upper side of the push plate fixing plate.
[0007] Preferably, the second inclined push rod is located behind the first inclined push rod.
[0008] Preferably, the first inclined push rod and the first inclined push block are integrally formed.
[0009] Preferably, the second inclined push rod is tilted backward, the second inclined push rod and the second inclined push block are integrally formed, and the straight push rod is located behind the middle part between the second inclined push rods on the left and right sides.
[0010] Preferably, the lower end of the lower template has pads connected to both the left and right sides by bolts, the bottom of the pads is fixed to the lower template base plate by bolts, and a reset rod is slidably connected between the push plate and the bottom of the lower template.
[0011] Preferably, a spring is movably sleeved on the reset rod, and there are four reset rods, which are distributed in a rectangular pattern along the center of the push plate.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] In this invention, for the molding and ejection of plastic parts with full circumference radius (R-angle), a double-sloping ejector with opposing forces in different directions is used, along with a straight push rod for ejection, which solves the problem of difficult demolding of products with full circumference radius (R-angle). This allows the plastic parts with full circumference radius (R-angle) to be easily demolded under the action of forces in different directions after molding. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0016] Figure 3 This is an exploded view showing the fit between the upper and lower mold cores of this utility model.
[0017] Figure 4 This is a schematic diagram of the push plate connection structure of this utility model.
[0018] In the diagram: 1. Upper mold base plate; 2. Upper template; 3. Lower template; 4. Lower mold base plate; 5. Pad block; 6. Push plate; 7. Push plate fixing plate; 8. Reset rod; 9. Spring; 10. Upper mold core; 11. Lower mold core; 12. Full-circumference R-angle plastic part; 13. Straight push rod; 14. Second inclined push rod; 15. First inclined push rod; 16. First support seat; 17. Second support seat; 18. First inclined push block; 19. Second inclined push block. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] Example:
[0023] Please see Figure 1-4This utility model provides a technical solution: a molding die for a plastic part with a full circumferential radius (R-angle) that facilitates demolding, comprising an upper mold plate 2 and a lower mold plate 3. An upper mold base plate 1 is connected to the upper end of the upper mold plate 2, and the upper mold plate 2 and the upper mold base plate 1 are fixed together by bolts. A positioning ring and a sprue sleeve are provided on the upper mold base plate 1. The lower mold plate 3 is guided and installed on the lower side of the upper mold plate 2, guided by guide pillars and guide sleeves. A lower mold base plate 4 is connected to the bottom of the lower mold plate 3. An upper mold core 10 and a lower mold core 11 are respectively provided on the upper mold plate 2 and the lower mold plate 3. After the upper mold core 10 and the lower mold core 11 are closed, an injection cavity is formed to form a plastic part 12 with a full circumferential radius (R-angle). The plastic part 12 with a full circumferential radius (R-angle) is formed by injection molding in the injection cavity. The R-angle formed by the injection cavity is located on its left, right, and rear sides (of the injection cavity), so the R-angle of the plastic part 12 with a full circumferential radius (R-angle) is also located in this position. The lower mold base plate... A push plate 6 is slidably connected to the upper part of the injection molded cavity. A first support seat 16 and a second support seat 17 are installed on the left and right sides of the upper surface of the push plate 6. A first inclined push block 18 and a second inclined push block 19 are slidably connected to the left and right sides of the bottom of the injection molded cavity. A first inclined push rod 15 and a second inclined push rod 14 are respectively connected to the bottom of the first inclined push block 18 and the second inclined push block 19. The bottom of the first inclined push rod 15 is slidably connected to the upper side of the first support seat 16 laterally. A transverse sliding groove is opened on the upper surface of the first support seat 16. The bottom of the first inclined push rod 15 is inserted into the transverse sliding groove for sliding connection. The bottom of the second inclined push rod 14 is slidably connected to the upper side of the second support seat 17 longitudinally. A longitudinal sliding groove is opened on the upper surface of the second support seat 17. The bottom of the first inclined push rod 15 is inserted into the longitudinal sliding groove for sliding connection. A straight push rod 13 is connected to the upper side of the push plate 6. The upper end of the straight push rod 13 is located at the bottom of the injection molded cavity.
[0024] A push plate fixing plate 7 is bolted to the upper side of the push plate 6, and the first support seat 16 and the second support seat 17 both extend to the upper side of the push plate fixing plate 7.
[0025] The second inclined push rod 14 is located behind the first inclined push rod 15.
[0026] The first inclined push rod 15 and the first inclined push block 18 are integrally formed to improve strength and smoothness.
[0027] The second inclined push rod 14 is tilted backward, and the second inclined push rod 14 and the second inclined push block 19 are integrally formed to improve strength and smoothness. The straight push rod 13 is located behind the middle part between the second inclined push rods 14 on the left and right sides.
[0028] The lower template 3 has pads 5 on both the left and right sides at the bottom end, which are bolted together. The bottom of the pads 5 is fixed to the lower mold base plate 4 by bolts. The push plate 6 and the bottom of the lower template 3 are slidably connected by a reset rod 8.
[0029] A spring 9 is movably sleeved on the reset rod 8. There are four reset rods 8, which are distributed in a rectangular shape along the center of the push plate 6 to facilitate stable reset.
[0030] Working principle: Molten plastic material enters the mold runner through the upper mold base plate 1, and is finally formed in the injection cavity to obtain the required full-circumference R-angle plastic part 12. During the ejection process of the full-circumference R-angle plastic part 12, the push plate 6 drives the first support seat 16, the second support seat 17, and the straight push rod 13 to move upward. Since the bottom of the first inclined push rod 15 and the upper side of the first support seat 16 are laterally slidably connected, and the bottom of the second inclined push rod 14 and the upper side of the second support seat 17 are longitudinally slidably connected, they collide and eject the part in different directions. This allows the full-circumference R-angle plastic part 12 to be easily demolded under the action of forces in different directions after it is formed.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A molding die for a plastic part with a full circumference radius (R-angle) that facilitates demolding, comprising an upper mold plate (2) and a lower mold plate (3), characterized in that: The upper mold plate (2) is connected to the upper mold base plate (1) at its upper end. The lower mold plate (3) is installed on the lower side of the upper mold plate (2) as a guide. The lower mold base plate (4) is connected to the bottom of the lower mold plate (3). The upper mold core (10) and the lower mold core (11) are respectively provided on the upper mold plate (2) and the lower mold plate (3). After the upper mold core (10) and the lower mold core (11) are closed, they form an injection cavity for molding a plastic part (12) with a full circumference R-angle. The R-angle formed by the injection cavity is located on its left, right and rear sides. The lower mold base plate (4) is slidably connected to a push plate (6). The upper surface of the push plate (6) is equipped with a first support on both the left and right sides. The bottom of the injection molding cavity is slidably connected to the support (16) and the second support (17), the left and right sides of the bottom of the injection molding cavity are connected to the first inclined push block (18) and the second inclined push block (19), the bottom of the first inclined push block (18) and the second inclined push block (19) are respectively connected to the first inclined push rod (15) and the second inclined push rod (14), and the bottom of the first inclined push rod (15) and the upper side of the first support (16) are slidably connected laterally, the bottom of the second inclined push rod (14) and the upper side of the second support (17) are slidably connected longitudinally, and the upper side of the push plate (6) is connected to the straight push rod (13), the upper end of the straight push rod (13) is located at the bottom of the injection molding cavity.
2. The molding die for a full-circumference R-angle plastic part with convenient demolding according to claim 1, characterized in that: The upper side of the push plate (6) is connected to the push plate fixing plate (7) by bolts, and the first support seat (16) and the second support seat (17) both extend to the upper side of the push plate fixing plate (7).
3. The molding die for a full-circumference R-angle plastic part with convenient demolding according to claim 1, characterized in that: The second inclined push rod (14) is located behind the first inclined push rod (15).
4. A molding die for a plastic part with a full circumference radius (R-angle) that facilitates demolding, as described in claim 3, is characterized in that: The first inclined push rod (15) and the first inclined push block (18) are integrally formed.
5. A molding die for a plastic part with a full circumference radius (R-angle) that facilitates demolding, as described in claim 3, characterized in that: The second inclined push rod (14) is tilted backwards, and the second inclined push rod (14) and the second inclined push block (19) are integrally formed. The straight push rod (13) is located behind the middle part between the second inclined push rods (14) on the left and right sides.
6. A molding die for a plastic part with a full circumference radius (R-angle) that facilitates demolding, as described in claim 1, characterized in that: The lower template (3) has pads (5) on both the left and right sides at the bottom end connected by bolts. The bottom of the pads (5) is fixed to the lower mold base plate (4) by bolts. The push plate (6) and the bottom of the lower template (3) are slidably connected by a reset rod (8).
7. A molding die for a plastic part with a full circumference radius (R-angle) that facilitates demolding, as described in claim 6, is characterized in that: A spring (9) is movably sleeved on the reset rod (8). There are four reset rods (8), and the four reset rods (8) are distributed in a rectangular shape along the center of the push plate (6).