Injection mold for a bicycle stand

Abstract

The utility model discloses a kind of injection mould for bicycle support, including base, the base is equipped with bearing seat, the lower die seat is equipped on the bearing seat;The lower die seat is composed of left side module and right side module, the inside of left side module and right side module is equipped with cavity for forming bicycle support;The bearing seat is equipped with auxiliary stripping assembly, and the auxiliary stripping assembly includes side plate installed in the both sides of bearing seat, by the cooperation of top rod, top block, side plate, fixed block, top rod promotes top block to make the bevel cooperation structure formed by the gap groove of fixed block and the inclined surface groove of side plate Sliding, drive the left side module and right side module of lower die seat to separate to both sides, realize automatic stripping, compared with traditional mould, stripping difficulty and required external force are reduced, simultaneously, the adaptive design of bearing seat guide cavity and side plate guide block, guarantee side plate sliding stability, improve stripping efficiency and product qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for a bicycle bracket. Background Technology

[0002] In the bicycle manufacturing industry, injection molds are key equipment for producing bicycle frames.

[0003] Currently, traditional bicycle frame injection molds typically use an integral lower mold base structure. During demolding, due to the complex shape of the bicycle frame and the tight fit between the molded product and the mold cavity, a large demolding force is often required. This not only easily causes surface damage to the product and reduces the product qualification rate, but also results in low demolding efficiency and increased production costs. Although some molds adopt a split lower mold base design, they lack an effective auxiliary demolding structure, and the fit between the components is not precise enough. As a result, the split modules of the lower mold base are difficult to separate stably during demolding, affecting the service life of the mold and the continuity of production.

[0004] Therefore, we provide an injection mold for bicycle brackets. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing an injection mold for bicycle brackets, which solves the problems of difficult demolding, unreasonable structure, and poor stability of existing molds.

[0006] In view of this, the present invention provides an injection mold for a bicycle bracket, including a base, a support seat on the base, and a lower mold base on the support seat;

[0007] The lower mold base is composed of a left module and a right module, and the inner sides of the left module and the right module are provided with cavities for forming bicycle brackets.

[0008] The support base is provided with an auxiliary demolding component, which includes side plates installed on both sides of the support base, and the left module and the right module are installed on the side plates.

[0009] The side plate has a cavity, one end of which has a sloping groove. A fixing block is provided inside the cavity of the side plate. The upper end of the fixing block has a notch. The fixing block is installed on the base.

[0010] The base is provided with a top block, which is connected to a top rod, and the top rod is installed in the middle position of the base.

[0011] Preferably, the support seat has guide cavities on both sides, and the side plate has guide blocks at both ends that are adapted to the guide cavities. The side plate can slide within the guide cavities of the support seat through the guide blocks at both ends.

[0012] Preferably, the inclined groove at one end of the side plate and the notch at the upper end of the fixing block form an inclined mating structure, and the inclination angle and shape of the two are matched.

[0013] Preferably, a hydraulic cylinder is provided below the base, and the output end of the hydraulic cylinder is connected to a push rod installed on the base.

[0014] Preferably, the base is provided with four guide pillars, which pass through the support seat.

[0015] Preferably, the four guide posts are threaded at the bottom and are spirally mounted on the base.

[0016] Preferably, the side panel is provided with positioning holes, and the left and right modules are detachably installed on the side panels at the left and right ends by means of fastening bolts.

[0017] Preferably, the base has grooves at both ends, and the bottom of the fixing block has a matching screw hole in the groove of the base. The fixing block is detachably installed in the grooves on both sides of the base.

[0018] Compared with the prior art, the present invention provides an injection mold for a bicycle bracket, which has the following advantages:

[0019] 1. This utility model, through the cooperation of a push rod, a push block, a side plate, and a fixing block, allows the push rod to push the push block, causing the side plate to slide along the inclined surface mating structure formed by the notch groove of the fixing block and the inclined surface groove of the side plate. This drives the left and right modules of the lower mold base to separate to both sides, achieving automatic demolding. Compared with traditional molds, this reduces the demolding difficulty and the required external force. At the same time, the matching design of the guide cavity on the bearing seat and the guide block of the side plate ensures the stability of the side plate sliding, improving demolding efficiency and product qualification rate.

[0020] 2. In this utility model, the left and right modules are detachably mounted on the side plate by fastening bolts, the fixing blocks are detachably mounted in the grooves on both sides of the base, and the guide pillars are mounted on the base by threaded screws. These detachable connection methods make it easy to install, disassemble and replace the various parts of the mold, which facilitates the daily maintenance of the mold.

[0021] 3. This utility model, through the inclined surface cooperation structure of the side plate and the fixed block, the cooperation between the bearing seat guide cavity and the side plate guide block, and the setting of the guide post on the base, not only ensures the accurate alignment of the lower mold base when the mold is closed and ensures the molding accuracy of the cavity, but also enhances the stability of the overall mold structure and reduces product defects caused by mold shaking or displacement during injection molding.

[0022] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0023] Figure 1 This is the overall view of the present utility model;

[0024] Figure 2 This is the demolding working diagram proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the side plate installation structure proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the fixing block installation structure proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the hydraulic cylinder and push rod installation structure proposed in this utility model.

[0028] In the diagram: 1. Base; 2. Bearing seat; 21. Guide cavity; 3. Lower mold base; 31. Left side module; 32. Right side module; 33. Cavity; 4. Auxiliary demolding assembly; 41. Side plate; 411. Inclined groove; 412. Guide block; 42. Fixing block; 421. Notch groove; 43. Ejector block; 44. Ejector rod; 45. Hydraulic cylinder; 5. Guide pillar; 51. Thread. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0031] Example 1: An injection mold for a bicycle bracket, such as Figures 1-5 As shown, it includes a base 1, a support seat 2 on the base 1, and a lower mold seat 3 on the support seat 2;

[0032] The lower mold base 3 is composed of a left module 31 and a right module 32. The inner sides of the left module 31 and the right module 32 are provided with cavities 33 for forming bicycle brackets.

[0033] The support base 2 is provided with an auxiliary demolding assembly 4. The auxiliary demolding assembly 4 includes side plates 41 installed on both sides of the support base 2. The left module 31 and the right module 32 are installed on the side plates 41.

[0034] The side plate 41 has a cavity, one end of which has an inclined groove 411. A fixing block 42 is provided in the cavity of the side plate 41. The upper end of the fixing block 42 has a notch 421. The fixing block 42 is installed on the base 1.

[0035] The base 1 is provided with a top block 43, which is connected to a top rod 44. The top rod 44 is installed in the middle position of the base 1.

[0036] In use, the left module 31 and the right module 32 are installed on the positioning holes of the side plate 41 with fastening bolts to form a complete lower mold base 3, ensuring that the cavity 33 (the space for molding the bicycle frame) is closed without gaps. Then, the upper mold (not shown) descends vertically along the guide post 5 to close with the cavity 33 of the lower mold base 3, forming a closed injection cavity. The injection molding machine injects molten plastic into the cavity 33, which is cooled and solidified to form the bicycle frame part. After injection molding is completed, the hydraulic cylinder 45 is activated, pushing the ejector rod 44 to move upward, which drives the ejector block 43 to rise synchronously. At this time, the bearing seat 2 is lifted up, due to the slope of one end of the side plate 41. The groove 411 and the notch 421 at the upper end of the fixing block 42 form an inclined mating structure. When the side plate 41 moves upward with the lower mold base 3, the interaction force between the inclined surfaces forces the side plate 41 to move horizontally to both sides. During this process, the fixing block 42 is fixed on the base 1 and remains stationary. By constraining the movement direction of the side plate 41 through the inclined surfaces, the left module 31 and the right module 32 are separated laterally. After the side plate 41 is completely separated to both sides, the ejector rod 44 continues to rise, vertically ejecting the molded bicycle bracket part from the cavity 33, completely separating it from the lower mold base 3. The operator can then directly remove the part, completing one injection molding cycle.

[0037] like Figures 1-4 As shown, the support seat 2 has guide cavities 21 on both sides, and the side plate 41 has guide blocks 412 at both ends that are adapted to the guide cavities 21. The side plate 41 can slide in the guide cavity 21 of the support seat 2 through the guide blocks 412 at both ends.

[0038] The matching design of the guide cavity 21 and the guide block 412 provides a precise guide path for the sliding of the side plate 41, avoiding the side plate 41 from shifting or shaking during demolding, ensuring that the left module 31 and the right module 32 move smoothly in a fixed direction, and ensuring the reliability of the demolding action.

[0039] like Figures 1-5 As shown, the inclined groove 411 at one end of the side plate 41 and the notch 421 at the upper end of the fixing block 42 form an inclined mating structure, and their inclination angles and shapes match each other.

[0040] like Figures 1-5 As shown, a hydraulic cylinder 45 is provided below the base 1, and the output end of the hydraulic cylinder 45 is connected to the push rod 44 installed on the base 1.

[0041] like Figures 1-5 As shown, the base 1 is provided with four guide pillars 5, which pass through the bearing seat 2. The four guide pillars 5 are provided with threads 51 below them. The four guide pillars 5 are installed on the base 1 in a spiral manner. The four guide pillars 5 pass through the bearing seat 2 and are fixed to the base 1 by the bottom threads 51, providing vertical guidance for the bearing seat 2 and the lower mold seat 3, ensuring that the upper and lower molds are accurately aligned when the mold is closed.

[0042] like Figures 1-5 As shown, the side plate 41 is provided with positioning holes, and the left module 31 and the right module 32 are detachably installed on the side plates 41 at both ends by means of fastening bolts.

[0043] Example 2: An injection mold for a bicycle bracket, such as Figures 1-5 As shown, grooves are formed at both ends of the base 1, and the bottom of the fixing block 42 is formed with a matching screw hole in the groove of the base 1. The fixing block 42 is detachably installed in the grooves on both sides of the base 1.

[0044] In use, the grooves at both ends of the base 1 provide a physical positioning reference for the fixing block 42, ensuring that the fixing block 42 is accurately positioned during installation. When the fixing block 42 wears out due to long-term use or needs to be adapted to a new mold structure, it can be disassembled and replaced separately because the bottom of the fixing block 42 and the groove of the base 1 form a matching screw hole, without the need to disassemble the mold as a whole, thus reducing maintenance costs and time.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An injection mold for a bicycle bracket, comprising a base (1), a support seat (2) on the base (1), and a lower mold base (3) on the support seat (2), characterized in that: The lower mold base (3) is composed of a left module (31) and a right module (32), and the inner sides of the left module (31) and the right module (32) are provided with cavities (33) for forming bicycle brackets; The support base (2) is provided with an auxiliary demolding assembly (4), which includes side plates (41) installed on both sides of the support base (2). The left module (31) and the right module (32) are installed on the side plates (41). The side plate (41) has a cavity, and one end of it has a sloping groove (411). A fixing block (42) is provided in the cavity of the side plate (41). The upper end of the fixing block (42) has a notch (421). The fixing block (42) is installed on the base (1). The base (1) is provided with a top block (43), which is connected to a top rod (44), and the top rod (44) is installed in the middle position of the base (1).

2. The injection mold for a bicycle stand according to claim 1, wherein The support seat (2) has guide cavities (21) on both sides, and the side plate (41) has guide blocks (412) at both ends that are adapted to the guide cavities (21). The side plate (41) can slide in the guide cavity (21) of the support seat (2) through the guide blocks (412) at both ends.

3. An injection mold for a bicycle rack according to claim 2, wherein The inclined groove (411) at one end of the side plate (41) and the notch groove (421) at the upper end of the fixing block (42) form an inclined mating structure, and their inclination angles and shapes match each other.

4. The injection mold for a bicycle rack according to claim 1, wherein A hydraulic cylinder (45) is provided below the base (1), and the output end of the hydraulic cylinder (45) is connected to a push rod (44) installed on the base (1).

5. An injection mold for a bicycle rack according to claim 4, wherein The base (1) is provided with four guide posts (5), which pass through the bearing seat (2).

6. The injection mold for a bicycle bracket according to claim 5, characterized in that, The four guide posts (5) are provided with threads (51) below them, and the four guide posts (5) are installed on the base (1) in a spiral manner.

7. The injection mold for a bicycle rack according to claim 2, wherein The side plate (41) is provided with positioning holes. The left module (31) and the right module (32) are both installed on the side plates (41) at the left and right ends by means of fastening bolts.

8. The injection mold for a bicycle rack according to claim 1, wherein The base (1) has grooves at both ends, and the bottom of the fixing block (42) has a matching screw hole in the groove of the base (1). The fixing block (42) is detachably installed in the grooves on both sides of the base (1).

Images