Limiting injection molding mechanism for hollow spline shaft

Abstract

The utility model discloses a hollow spline shaft limiting injection molding mechanism which comprises a sliding table, a limiting retarding mechanism, a limiting shaft groove, a shaft end positioning sliding frame, a limiting inner hole column, an injection molding cavity mechanism and an auxiliary ejector rod. And meanwhile, the limiting retarding mechanism is arranged to be matched with the sliding limiting frame to position and convey the hollow spline shaft, the phenomenon that injection molding layers are damaged due to the fact that products are easily brought back into the cavity by the ejector rod after injection molding is effectively prevented, and the injection molding products are stable in quality.

Description

Technical Field

[0001] This utility model relates to the technical field of spline shaft processing devices, and in particular to the technical field of hollow spline shaft limiting injection molding mechanism. Background Technology

[0002] The car adjusts its driving status by sliding the spline shaft and spline bushing on the column. Due to the connection gap, the spline shaft connection is prone to causing abnormal noises in the car. Coating the spline shaft with a layer of wear-resistant plastic can effectively reduce abnormal noises during the car adjustment process. Generally, the spline shaft injection molding method is used for the wear-resistant plastic coating. The existing spline shaft injection molding mechanism uses the front positioning outer circle of the shaft end, which can easily lead to the accumulation of injection molding material. There is no blocking structure. After injection molding, the product can easily be carried back into the cavity by the ejector rod, resulting in damage to the injection molding layer. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a hollow spline shaft limiting injection molding mechanism. This mechanism can effectively prevent the accumulation of injection molding material by positioning the shaft end through the inner hole. At the same time, a limiting and blocking mechanism is set up in conjunction with a sliding limiting frame to position and transport the hollow spline shaft, effectively preventing the phenomenon that the product is easily carried back to the cavity by the ejector rod after injection molding, which would lead to damage to the injection molding layer. This ensures stable quality of the injection molded product.

[0004] To achieve the above objectives, this utility model proposes a hollow spline shaft limiting injection molding mechanism, including a slide table, a limiting blocking mechanism, a limiting shaft groove, a shaft end positioning slide, a limiting inner hole column, an injection molding cavity mechanism, and an auxiliary push rod. The left end of the slide table is provided with a limiting blocking mechanism, and the top end of the limiting blocking mechanism is provided with a limiting shaft groove. The shaft end positioning slide is slidably mounted on the slide table, and the top end of the shaft end positioning slide is provided with a limiting inner hole column corresponding to the shaft center hole position of the hollow spline shaft workpiece. The left side of the slide table is provided with an injection molding cavity mechanism, and the left end of the injection molding cavity mechanism is inserted with an auxiliary push rod.

[0005] Preferably, the top of the slide table is provided with a limiting groove, and the limiting blocking mechanism and the shaft end positioning slide are slidably disposed in the limiting groove.

[0006] Preferably, a limiting slide is slidably provided on the right end of the slide table, and a limiting top rod is provided on the left side of the limiting slide corresponding to the position of the limiting inner hole column.

[0007] Preferably, the centerlines of the limiting shaft groove, the limiting inner hole column, the injection molding cavity mechanism, and the auxiliary push rod are located on the same straight line.

[0008] Preferably, the injection molding cavity mechanism includes a main cavity and a secondary cavity, and the center deviation between the main cavity and the secondary cavity is no greater than 5%.

[0009] Preferably, the limiting shaft groove is an arc-shaped groove with an open top, and the outer surface of the limiting shaft groove is coated with a wear-resistant silicone layer.

[0010] Preferably, both the limiting and blocking mechanism and the bottom end of the shaft-end positioning slide are equipped with electric sliders.

[0011] The beneficial effects of this utility model are as follows: This utility model combines a slide table, a limiting and blocking mechanism, a limiting shaft groove, a shaft end positioning slide, a limiting inner hole column, an injection cavity mechanism, and an auxiliary ejector rod. After experimental optimization, it can effectively prevent the accumulation of injection molding material through the positioning of the shaft end inner hole. At the same time, the limiting and blocking mechanism, together with the sliding limiting frame, positions and transports the hollow spline shaft, effectively preventing the phenomenon that the product is easily carried back to the cavity by the ejector rod after injection molding, which would lead to damage to the injection molding layer. The quality of the injection molded product is stable.

[0012] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hollow spline shaft limiting injection molding mechanism of this utility model.

[0014] In the figure: 1-slide table, 2-limiting and blocking mechanism, 3-limiting shaft groove, 4-shaft end positioning slide, 5-limiting inner hole column, 6-injection molding cavity mechanism, 7-auxiliary ejector rod. Detailed Implementation

[0015] See Figure 1This utility model discloses a hollow spline shaft limiting injection molding mechanism, comprising a slide table 1, a limiting blocking mechanism 2, a limiting shaft groove 3, a shaft end positioning slide 4, a limiting inner hole column 5, an injection molding cavity mechanism 6, and an auxiliary push rod 7. The left end of the slide table 1 is provided with the limiting blocking mechanism 2, and the top end of the limiting blocking mechanism 2 is provided with the limiting shaft groove 3. The shaft end positioning slide 4 is slidably mounted on the slide table 1, and the top end of the shaft end positioning slide 4 is provided with a limiting inner hole column 5 corresponding to the shaft center hole position of the hollow spline shaft workpiece. The left side of the slide table 1 is provided with the injection molding cavity mechanism 6, and the left end of the injection molding cavity mechanism 6 is inserted with the auxiliary push rod 7. The top end of the slide table 1 is provided with a limiting groove. The limiting and blocking mechanism 2 and the shaft end positioning slide 4 are slidably disposed in the limiting slide groove. The right end of the slide table 1 is slidably disposed with a limiting slide. The left side of the limiting slide is disposed with a limiting top rod corresponding to the position of the limiting inner hole column 5. The axis of the limiting shaft groove 3, the limiting inner hole column 5, the injection cavity mechanism 6 and the auxiliary top rod 7 are located on the same straight line. The injection cavity mechanism 6 includes a main cavity and a secondary cavity. The center deviation between the main cavity and the secondary cavity is no more than 5%. The limiting shaft groove 3 is an arc-shaped groove with an open top. The outer surface of the limiting shaft groove 3 is coated with a wear-resistant silicone layer. The bottom ends of the limiting and blocking mechanism 2 and the shaft end positioning slide 4 are both provided with electric sliders.

[0016] This utility model combines a slide table 1, a limiting and blocking mechanism 2, a limiting shaft groove 3, a shaft end positioning slide 4, a limiting inner hole column 5, an injection molding cavity mechanism 6, and an auxiliary ejector rod 7. After experimental optimization, it can effectively prevent the accumulation of injection molding material through the positioning of the shaft end inner hole. At the same time, the limiting and blocking mechanism 2, together with the sliding limiting frame, positions and transports the hollow spline shaft, effectively preventing the phenomenon that the product is easily carried back to the cavity by the ejector rod after injection molding, which would lead to damage to the injection molding layer. The quality of the injection molded product is stable.

[0017] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A hollow spline shaft limiting injection molding mechanism, characterized in that: The system includes a slide (1), a limiting and blocking mechanism (2), a limiting shaft groove (3), a shaft end positioning slide (4), a limiting inner hole column (5), an injection molding cavity mechanism (6), and an auxiliary push rod (7). The left end of the slide (1) is provided with a limiting and blocking mechanism (2), and the top end of the limiting and blocking mechanism (2) is provided with a limiting shaft groove (3). The shaft end positioning slide (4) is slidably arranged on the slide (1). The top end of the shaft end positioning slide (4) is provided with a limiting inner hole column (5) corresponding to the shaft center hole position of the hollow spline shaft workpiece. The left side of the slide (1) is provided with an injection molding cavity mechanism (6), and the left end of the injection molding cavity mechanism (6) is interspersed with an auxiliary push rod (7).

2. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: The top of the slide table (1) is provided with a limiting groove, and the limiting blocking mechanism (2) and the shaft end positioning slide (4) are slidably arranged in the limiting groove.

3. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: The right end of the slide table (1) is provided with a limiting slide, and the left side of the limiting slide is provided with a limiting top rod corresponding to the position of the limiting inner hole column (5).

4. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: The centerlines of the limiting shaft groove (3), the limiting inner hole column (5), the injection molding cavity mechanism (6) and the auxiliary push rod (7) are located on the same straight line.

5. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: The injection molding cavity mechanism (6) includes a main cavity and a secondary cavity, and the center deviation between the main cavity and the secondary cavity is no greater than 5%.

6. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: The limiting shaft groove (3) is an arc-shaped groove with an open top, and the outer surface of the limiting shaft groove (3) is coated with a wear-resistant silicone layer.

7. The hollow spline shaft limiting injection molding mechanism as described in claim 1, characterized in that: Both the limiting and blocking mechanism (2) and the shaft end positioning slide (4) are equipped with electric sliders at their bottom ends.

Images