Special-shaped retainer injection mold

Abstract

The utility model provides a kind of special cage injection mould, comprising: fixed mould base plate bottom is provided with stripper plate by bolt connection, the central bottom of stripper plate is equipped with upper die kernel;Movable template is in the bottom of stripper plate, and movable template top is equipped with lower die kernel in the middle;Injection channel top is equipped in the middle of fixed mould base plate and stripper plate, and injection channel bottom is opened in the top of lower die kernel by upper die kernel;Discharge module bottom is set in the bottom of movable template by bolt connection, and discharge module top is equipped in the periphery of lower die kernel by movable template;Movable mould base plate is set in the bottom of supporting block in discharge module by bolt connection, the utility model uses multiple point feeding to make molten plastic uniform filling forming cavity, avoid local stress concentration caused by the pressure of single point gate neighborhood being too high, to effectively reduce product warping deformation out-of-tolerance;Waste ejector rod is bent to waste and breaks at bending broken material bump, waste is broken due to bending, and automatically separated from product, without manual pruning, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bearing parts processing, and in particular to the field of cage injection molding technology, specifically a special-shaped cage injection mold. Background Technology

[0002] There is a type of irregularly shaped retainer with a regular circular top and chamfered edges on the outer side wall, and protruding ribs at the intervals of each circular hole on the bottom. This type of retainer uses a basic single-point injection mold. Because of the rib structure, the pressure is high near the gate during injection molding, resulting in a large number of defective products with warping and deformation. Furthermore, during the unloading process of the retainer injection molded with the above-mentioned mold, residual waste material in the runner is pushed out along with the product, requiring additional trimming steps and reducing production efficiency. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an injection mold for irregularly shaped retainers to solve the difficulties of the prior art.

[0004] To achieve the above and other related objectives, this utility model provides an injection mold for an irregularly shaped cage, comprising:

[0005] A fixed mold base plate 1 is provided with a stripper plate 2 at the bottom of the fixed mold base plate 1 by bolts. Guide sleeves 21 are provided around the stripper plate 2, and an upper mold core 22 is provided at the center of the bottom of the stripper plate 2.

[0006] The moving template 3 is set at the bottom of the stripper plate 2. The top of the moving template 3 is provided with guide posts 31 around its perimeter. The guide posts 31 are locked in the guide sleeve 21. A mold core groove is opened in the center of the top of the moving template 3. The lower mold core 32 is locked in the mold core groove.

[0007] Injection channel 4, the top of injection channel 4 passes through the center of fixed mold base plate 1 and stripper plate 2, and the bottom of injection channel 4 passes through upper mold core 22 and is opened at the top of lower mold core 32;

[0008] The unloading module 5 is bolted to the bottom of the moving template 3, and the top of the unloading module 5 passes through the moving template 3 and is installed around the lower mold core 32.

[0009] The moving mold base plate 6 is bolted to the bottom of the support block 52 in the unloading module 5.

[0010] According to the preferred embodiment, the upper mold core 22 is fitted on the top of the lower mold core 32, the gap between the upper mold core 22 and the lower mold core 32 is a molding cavity, and the top of the lower mold core 32 is provided with a material unloading groove around the bottom of the molding cavity, and a material unloading plate 33 is inserted in the material unloading groove.

[0011] According to the preferred embodiment, injection channel 4 includes:

[0012] A casting positioning ring 41 is inserted through the center of the fixed mold base plate 1;

[0013] Casting bushing 42, which is inserted through the center of the top of the moving template 3;

[0014] The casting hole 43 is located at the center of the bottom of the moving template 3, and the bottom of the casting hole 43 is located at the center of the upper mold core 22. The bottom of the casting hole 43 communicates with the molding cavity.

[0015] The flow channel 44 is located at the top of the lower mold core 32. The top of the flow channel 44 communicates with the casting hole 43. The upper section of the flow channel 44 is a flow divider 441. The flow divider 441 is L-shaped and has several flow dividers 441. The flow dividers 441 are evenly spaced around the center of the lower mold core 32. The tops of the flow dividers 441 overlap on one side. A discharge channel 442 is opened at the center of the bottom of the flow divider 441. The discharge channel 442 is inclined downward. The discharge port 443 at the bottom of the discharge channel 442 is opened on the side wall of the lower mold core 32 and communicates with the molding cavity.

[0016] According to the preferred embodiment, the unloading module 5 includes:

[0017] The unloading push rod hole 51 is located in the center of the moving mold base plate 6;

[0018] Support block 52, the support block 52 is installed on the left and right or front and rear sides of the bottom of the moving template 3 by bolt connection;

[0019] The guide push plate 53 is placed at the top center of the moving mold base plate 6, and the guide push plate 53 is in contact with the inner side wall of the support block 52 around its perimeter.

[0020] A support guide column 54 is provided, the bottom of which is engaged around the guide push plate 53, and the top of which passes vertically upward through the moving template 3.

[0021] Waste ejection hole 55 is provided at the connection between discharge channel 442 and diversion channel 441. Waste ejection rod 56 is provided through the center of waste ejection hole 55. The bottom of waste ejection rod 56 is vertically inserted into guide push plate 53.

[0022] Product ejection countersunk hole 57 is formed around the unloading plate 33. Product ejection pin 58 is inserted into the product ejection countersunk hole 57 and is inserted vertically downward into the guide push plate 53.

[0023] According to the preferred embodiment, the length of the waste ejection rod 56 is greater than that of the product ejection pin 58.

[0024] According to the preferred embodiment, a bending and breaking protrusion 45 is provided in the center of the discharge channel 442.

[0025] This utility model employs a fixed mold base plate, an upper mold core, a moving mold plate, an injection channel, an unloading module, and a moving mold base plate; achieving the following beneficial effects:

[0026] (1) Multi-point feeding allows the molten plastic to fill the molding cavity evenly, avoiding local stress concentration caused by excessive pressure near a single gate, thereby effectively reducing product warpage and deformation.

[0027] (2) The waste ejection rod pushes the waste to the bending and breaking protrusion. The waste breaks due to bending and is automatically separated from the product. No manual trimming is required, which improves production efficiency.

[0028] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0029] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0030] Figure 2 Shown as a mid-section view of this utility model

[0031] Figure 3 The diagram shown is an enlarged schematic of the fixed mold structure of this utility model.

[0032] Figure 4 The diagram shown is an enlarged schematic of the moving mold structure of this utility model.

[0033] Figure 5 The diagram shown is an enlarged three-dimensional structural diagram of the supporting guide column, the waste ejection rod, and the product ejection pin in this utility model.

[0034] Figure 6 The diagram shown is a schematic diagram of the unloading trough structure in this utility model.

[0035] Figure 7 The diagram shown is an enlarged three-dimensional structural diagram of the waste ejection hole and the product ejection countersunk hole in this utility model.

[0036] Figure 8 The diagram shown is a schematic representation of the flow channel in this utility model.

[0037] Figure 9 The diagram shown is a schematic of the lower mold after the injection molding process is completed.

[0038] Label Explanation

[0039] 1. Fixed mold base plate;

[0040] 2. Stripping plate;

[0041] 21. Guide sleeve; 22. Upper mold core;

[0042] 3. Dynamic template;

[0043] 31. Guide pillar; 32. Lower mold core; 33. Stripper plate; 34. Stripper groove;

[0044] 4. Injection channel;

[0045] 41. Casting positioning ring; 42. Casting bushing; 43. Casting hole; 44. Flow channel; 441. Diverter groove; 442. Discharge channel; 443. Discharge port; 45. Bending and breaking protrusion;

[0046] 5. Unloading module;

[0047] 51. Unloading push rod hole; 52. Support block; 53. Guide push plate; 54. Support guide column; 55. Scrap ejection hole; 56. Scrap ejection rod; 57. Product ejection countersunk hole; 58. Product ejection pin;

[0048] 6. Moving mold base plate; Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0050] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0051] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0052] This utility model proposes an injection mold for irregularly shaped cages, which can be used in bearing processing. This utility model does not limit the type of cage to be processed, but the structure of the fixed mold base plate 1, upper mold core 22, moving mold plate 3, injection channel 4, unloading module 5 and moving mold base plate 6 is particularly suitable for automatic material cutting in multi-channel injection molding of cages.

[0053] In general, the irregular-shaped retainer injection mold proposed in this utility model mainly includes: injection channel 4, unloading module 5, etc. (See also...) Figure 1 It shows the arrangement of the fixed mold base plate 1, the upper mold core 22, the moving mold plate 3, the injection channel 4, the unloading module 5 and the moving mold base plate 6.

[0054] The irregularly shaped retainer injection mold proposed in this utility model adopts multi-point feeding to reduce the pressure in the gate area and reduce product deformation. After injection molding, the injection molding machine separates the mold. In the injection molding machine, the ejector rod passes through the ejector rod hole 51 and abuts against the guide plate 53, so that it drives the scrap ejector rod 56 and the product ejector pin 58 to move upward along the support block 52. The scrap ejector rod 56 first enters the diversion groove 441 and ejects the residual material in the diversion groove 441 and the discharge channel 442 upward. The scrap deforms with the bending and breaking protrusion 45 as the bending center and separates from the retainer formed on the outside of the lower mold core 32. The scrap is automatically trimmed. Then the product ejector pin 58 drives the stripper plate 33 to move upward, so that the retainer separates from the lower mold core 32 and completes the unloading.

[0055] The bottom of the fixed mold base plate 1 is bolted to a stripper plate 2. Guide sleeves 21 are inserted around the stripper plate 2. An upper mold core 22 is inserted through the center of the bottom of the stripper plate 2. A movable mold plate 3 is located at the bottom of the stripper plate 2. Guide pillars 31 are inserted around the top of the movable mold plate 3. The guide pillars 31 are locked in the guide sleeves 21. A mold core groove is opened in the center of the top of the movable mold plate 3. A lower mold core 32 is locked in the mold core groove. The fixed mold base plate 1 and the stripper plate 2 are used to fix the upper mold core 22, while the movable mold plate 3 is used to fix the lower mold core 32. The cooperation between the guide pillars 31 and the guide sleeves 21 ensures the alignment of the movable mold plate 3 and the stripper plate 2 during the mold opening and closing process, reducing wear and the risk of product misalignment.

[0056] The upper mold core 22 is fitted on top of the lower mold core 32. The gap between the upper mold core 22 and the lower mold core 32 is the forming cavity. The top of the lower mold core 32 is located at the bottom of the forming cavity and has a material unloading groove around it. The material unloading groove is fitted with a material unloading plate 33. The forming cavity formed by the upper mold core 22 and the lower mold core 32 is the core area for product forming.

[0057] The injection channel 4 is located at the top of the fixed mold base plate 1 and the stripper plate 2, and at the bottom of the injection channel 4 is located at the top of the lower mold core 32, passing through the upper mold core 22. The injection channel 4 includes a casting positioning ring 41, a casting bushing 42, a casting hole 43, and a runner 44. The casting positioning ring 41 is located at the center of the fixed mold base plate 1, the casting bushing 42 is located at the top center of the moving mold plate 3, and the casting hole 43 is located at the bottom center of the moving mold plate 3. The bottom of the casting hole 43 is located at the top center of the upper mold core. At the center of mold core 32, the bottom of casting hole 43 communicates with the molding cavity. Runner 44 is located at the top of mold core 32, and its top communicates with casting hole 43. The upper section of runner 44 is a flow divider 441, which is L-shaped. Several flow dividers 441 are evenly spaced around the center of mold core 32, with their tops overlapping on one side. A discharge channel 442 is located at the center of the bottom of the flow channel, and it is angled downwards. The bottom outlet 443 of the material channel 442 is located on the side wall of the lower mold core 32. The outlet 443 is connected to the molding cavity. The flow channel design consists of multiple L-shaped flow channels, which are evenly distributed on the top of the lower mold core and connected to the molding cavity through the material channel. The material channel is inclined downward and the outlet is located on the side wall of the lower mold core, realizing multi-point feeding from the side of the product. This is not a traditional single-point gate or traditional multi-point feeding. Side feeding makes it easier to separate the waste and the product. On this basis, a bending and breaking protrusion 45 is preferably set in the center of the material channel 442 for waste separation. The design of the bending and breaking protrusion 45 can reduce the friction between the waste and the flow channel when the waste and the product are separated. It should be noted that the material channel 442 is located in the center of the bottom of the flow channel 441. The hollow section formed between the bottom side of the flow channel 441 and the flow channel 441 can accommodate the air in the flow channel during the casting process, which is beneficial to the flow of plastic and venting during casting.

[0058] The unloading module 5 is bolted to the bottom of the moving mold plate 3. The top of the unloading module 5 passes through the moving mold plate 3 and is positioned around the lower mold core 32. The unloading module 5 includes: an unloading push rod hole 51, a support block 52, a guide push plate 53, a support guide post 54, a waste ejection hole 55, and a product ejection countersunk hole 57. The unloading push rod hole 51 is located in the center of the moving mold base plate 6. The support block 52 is bolted to the left, right, front, and rear sides of the bottom of the moving mold plate 3. The guide push plate 53 is placed in the center of the top of the moving mold base plate 6, with its perimeter contacting the inner wall of the support block 52. The bottom of the support guide post 54 is engaged around the guide push plate 53. The top of the waste ejector rod passes vertically upward through the moving template 3. A waste ejection hole 55 is opened at the connection between the discharge channel 442 and the diversion channel 441. A waste ejection rod 56 is inserted through the center of the waste ejection hole 55. The bottom of the waste ejection rod 56 is inserted vertically downward inside the guide push plate 53. Product ejection countersunk holes 57 are opened around the unloading plate 33. Product ejection pins 58 are inserted into the product ejection countersunk holes 57. The product ejection pins 58 are inserted vertically downward inside the guide push plate 53. The length of the waste ejection rod 56 is greater than that of the product ejection pins 58, which realizes sequential ejection and avoids the waste from being pushed out with the product, reducing subsequent processing steps, and preventing the product from being pulled and deformed by the waste during the ejection process.

[0059] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An injection mold for an irregularly shaped cage, characterized in that, include: A fixed mold base plate (1) is provided with a stripper plate (2) at the bottom of the fixed mold base plate (1) by bolts. Guide sleeves (21) are provided around the stripper plate (2), and an upper mold core (22) is provided at the center of the bottom of the stripper plate (2). The moving template (3) is set at the bottom of the stripper plate (2). Guide posts (31) are provided around the top of the moving template (3). The guide posts (31) are locked in the guide sleeve (21). A mold core groove is opened in the center of the top of the moving template (3). The lower mold core (32) is locked in the mold core groove. The injection channel (4) has its top part passing through the center of the fixed mold base plate (1) and the stripper plate (2), and its bottom part passing through the upper mold core (22) and opening at the top of the lower mold core (32). The unloading module (5) is bolted to the bottom of the moving template (3), and the top of the unloading module (5) passes through the moving template (3) and is installed around the lower mold core (32). The moving mold base plate (6) is bolted to the bottom of the support block (52) in the unloading module (5).

2. The irregularly shaped cage injection mold according to claim 1, characterized in that, The upper mold core (22) is fitted on top of the lower mold core (32). The gap between the upper mold core (22) and the lower mold core (32) is a molding cavity. The top of the lower mold core (32) is provided with a material unloading groove around the bottom of the molding cavity. A material unloading plate (33) is installed in the material unloading groove.

3. The irregularly shaped cage injection mold according to claim 2, characterized in that, The injection channel (4) includes: A casting positioning ring (41) is inserted through the center of the fixed mold base plate (1); Casting bushing (42), the casting bushing (42) is inserted through the center of the top of the moving template (3); Casting hole (43), the casting hole (43) is opened in the center of the bottom of the moving template (3), the bottom of the casting hole (43) is opened in the center of the upper mold core (22), and the bottom of the casting hole (43) is connected to the molding cavity; The flow channel (44) is located at the top of the lower mold core (32). The top of the flow channel (44) is connected to the casting hole (43). The upper section of the flow channel (44) is a flow divider (441). The flow divider (441) is L-shaped. Several flow dividers (441) are provided. Several flow dividers (441) are equally spaced around the center of the lower mold core (32). The top of several flow dividers (441) overlaps on one side. A discharge channel (442) is opened in the center of the bottom of the flow divider (441). The discharge channel (442) is inclined downward. The discharge port (443) at the bottom of the discharge channel (442) is opened on the side wall around the lower mold core (32). The discharge port (443) is connected to the molding cavity.

4. The irregularly shaped cage injection mold according to claim 3, characterized in that, The unloading module (5) includes: The unloading push rod hole (51) is located in the center of the moving mold base plate (6); Support block (52), the support block (52) is set on the left and right or front and back sides of the bottom of the moving template (3) by bolt connection; The guide push plate (53) is placed at the top center of the moving mold base plate (6), and the guide push plate (53) is in contact with the inner wall of the support block (52) around its perimeter. A support guide column (54) is provided, the bottom of which is secured around the guide push plate (53), and the top of which passes vertically upward through the moving template (3). Waste ejection hole (55) is opened at the connection between discharge channel (442) and diversion channel (441). Waste ejection rod (56) is inserted through the center of the waste ejection hole (55). The bottom of the waste ejection rod (56) is vertically inserted into the guide push plate (53). The product ejection countersunk hole (57) is located around the unloading plate (33). The product ejection countersunk hole (57) is provided with a product ejection pin (58) which is vertically inserted into the guide push plate (53).

5. The irregularly shaped cage injection mold according to claim 4, characterized in that, The length of the waste ejector rod (56) is greater than that of the product ejector pin (58).

6. The irregularly shaped cage injection mold according to claim 5, characterized in that, A bending and breaking protrusion (45) is provided in the center of the discharge channel (442).

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