A mold for a dust cover of a steering tie rod joint

Abstract

The present invention proposes a mold for a steering tie rod joint dust cover, which is connected to the inner wall of the upper mold cavity through an injection channel, and the discharge port of the injection channel is connected to the widest position of the inner wall of the upper mold cavity (that is, the thickest part of the product), which can reduce and improve the smoothness of the product surface and improve its fatigue damage resistance compared with traditional products; at the same time, a thin connecting groove is added, and the flash is removed by freezing, which can reduce the occurrence of poor tearing effect or even tearing of the product and low trimming efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of a dust cover mould for a steering tie rod joint, in particular to a mould for a dust cover for a steering tie rod joint. Background Art

[0002] The steering rod joint dust cover is an important seal of the automobile steering system. When the car is turning, the steering wheel rotates through the steering gear rod to drive the steering wheel to achieve the steering of the car. When the car is driving, the suspension system works in poor conditions. Due to the violent beating of the tires, the dust and sand are raised, and the mud and water splash, the steering dust cover is easy to be damaged and broken. After damage, it will cause the loss of grease and the entry of dust and water, causing the ball head to rust, and finally lead to wear, looseness, abnormal noise, and serious accidents. Therefore, the role of the steering rod ball head dust cover is very important, and it is also a very large demand for easy parts. It is necessary to work hard to improve product quality and production efficiency, and continuously improve the mold structure. Since the dust cover is easily damaged by fatigue due to repeated compression and stretching during operation, the wall thickness of the dust cover corrugation must be uniform, which can effectively reduce stress concentration and prevent the generation of original small cracks. The surface of the corrugation should be as smooth and flat as possible. There are convex points on the original product structure. These convex points are to prevent the product from being torn when removing the waste glue from the runner. However, this will result in convex points on the surface of the product, which cannot be smooth and clean, and can easily affect the product's anti-fatigue damage ability. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a mold for a dust cover of a steering tie rod joint.

[0004] The present invention proposes a mold for a steering tie rod joint dust cover, comprising an upper mold plate, a lower mold plate and a half, wherein the upper mold core is installed on the upper mold plate, and the lower mold core is installed on the lower mold plate. The half is provided with a plurality of mold cavities, in which a lower mold core is installed, and a lower mold cavity is formed between the lower mold core and the half, and an upper mold core is arranged on the lower mold core, and an upper mold cavity connected to the lower mold cavity and an injection channel connected to the upper mold cavity are formed between the upper mold core and the lower mold core, wherein the discharge port of the injection channel is connected to the inner wall of the upper mold cavity, and an injection channel connected to the injection channel is penetrated through the upper mold core.

[0005] Preferably, the injection channel is cross-shaped, and the discharge port of the injection channel is a thin-diameter channel, the diameter of the thin-diameter channel is smaller than the diameter of the injection channel, and the thin-diameter channel is connected to the upper mold cavity.

[0006] Preferably, the half is provided with a plurality of thin connecting grooves corresponding to the plurality of mold cavities one by one, and the thin connecting grooves are connected to the mold cavities.

[0007] Preferably, a freezing groove connected to the thin connecting groove is provided on the half.

[0008] Preferably, a mounting groove matched with the lower mold core is provided on the lower mold plate, and the bottom of the lower mold core can be detachably inserted into the mounting groove.

[0009] Preferably, a plurality of injection grooves are provided on the upper mold plate, and a plurality of assembly grooves matched with the upper mold core are provided in the injection grooves, and the injection grooves are connected with injection channels on the plurality of upper mold cores in the injection grooves.

[0010] Preferably, an injection plug plate is arranged above the upper mold plate, and a plurality of injection plug protrusions corresponding to a plurality of injection grooves are connected to a side of the injection plug plate close to the upper mold plate, and the injection plug protrusions are adapted and slidably matched with the injection grooves.

[0011] Preferably, a No. 1 straight guide column is installed on the side of the injection plug plate close to the upper template, and a No. 1 positioning guide sleeve matched with the No. 1 straight guide column is installed on the upper template; a No. 2 straight guide column is installed on the side of the lower template close to the upper template, and a No. 2 positioning guide sleeve matched with the No. 2 straight guide column is installed on the upper template, and a lifting ear is connected to the upper template.

[0012] The beneficial effects of a mold for a steering rod joint dust cover proposed by the present invention are: by setting an injection channel connected to the inner wall of the upper mold cavity, and the discharge port of the injection channel is connected to the widest position of the inner wall of the upper mold cavity (that is, the thickest part of the product), the smoothness of the product surface can be reduced and improved, and its fatigue damage resistance can be improved compared with traditional products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0014] Figure 2 A top view of a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0015] Figure 3 A cross-sectional view of a lower mold core in a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0016] Figure 4 A top view of a lower mold core in a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0017] Figure 5 A cross-sectional view of a half in a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0018] Figure 6 A top view of a half half of a half in a mold for a dust cover of a steering tie rod joint proposed by the present invention;

[0019] Figure 7A partial cross-sectional view of a Haff in a conventional steering tie rod joint dust cover mold.

[0020] In the figure: 1. upper mold core; 2. lower mold core; 3. injection plug plate; 4. upper mold plate; 5. half; 6. lower mold plate; 7. straight guide pin No. 1; 8. positioning guide sleeve No. 1; 9. straight guide pin No. 2; 10. lifting ear; 11. positioning guide sleeve No. 2; 12. thin connecting groove; 13. freezing groove. DETAILED DESCRIPTION

[0021] Reference Figure 1-7 The present invention provides a mold for a dust cover of a steering tie rod joint, comprising an upper mold plate 4, a lower mold plate 6 and a half 5, wherein:

[0022] The upper mold core 1 is installed on the upper mold plate 4, the lower mold core 6 is installed on the lower mold plate 6, a plurality of mold cavities are opened on the half 5, the lower mold core 2 is installed in the mold cavity, the lower mold cavity is formed between the lower mold core 2 and the half 5, the upper mold core 1 is arranged on the lower mold core 2, an upper mold cavity connected with the lower mold cavity and an injection channel connected with the upper mold cavity are formed between the upper mold core 1 and the lower mold core 2, the discharge port of the injection channel is connected with the inner wall of the upper mold cavity, and an injection channel connected with the injection channel is opened through the upper mold core 1;

[0023] The material is injected through the injection channel, and the material enters the upper mold cavity and the lower mold cavity through the injection channel. The product dust cover is composed of multiple sections of bellows. The thickness at the opening position on the product is thicker than other parts. The discharge port of the injection channel is connected to the inner wall of the upper mold cavity at the position with the maximum thickness.

[0024] In a specific embodiment, the injection channel is cross-shaped, and the discharge port of the injection channel is a thin diameter channel. The diameter of the thin diameter channel is smaller than the diameter of the injection channel, and the thin diameter channel is connected to the upper mold cavity. The injection channel is designed to be cross-shaped, which can facilitate multi-point injection molding and ensure the uniformity of injection molding. At the same time, the thin diameter channel can reduce the connection with the product and eliminate the protruding injection point.

[0025] In a specific embodiment, a plurality of thin connecting grooves 12 corresponding to a plurality of mold cavities are provided on the half 5, and the thin connecting grooves 12 are connected to the mold cavities; the thickness of the thin connecting grooves 12 is 0.03 mm, which can facilitate the entry of excess material during injection molding. By adding more material during injection molding, the yield rate of the product can be ensured and the unqualified rate can be reduced. At the same time, the product after demolding can be placed in liquid nitrogen. Due to the low temperature of liquid nitrogen, elastomers such as rubber quickly lose their elasticity and become brittle. The waste material is separated from the product by a slight external force, thereby avoiding the traditional situation where the edge of the tearing groove is blunted, resulting in poor tearing effect or even tearing of the product, and reducing the low efficiency of trimming.

[0026] In a specific embodiment, a freezing groove 13 connected to the thin connecting groove 12 is provided on the half 5; it can be convenient for people to add more materials during re-injection molding, ensure the injection molding effect, facilitate the injection of excess materials, and improve the yield rate, and the freezing groove 13 is 0.15 to 0.3 mm away from the cavity.

[0027] In a specific embodiment, a mounting groove adapted to the lower mold core 2 is provided on the lower mold plate 6, and the bottom of the lower mold core 2 can be detachably inserted into the mounting groove, thereby ensuring the firmness and stability of the installation of the lower mold core 2.

[0028] In a specific embodiment, a plurality of injection grooves are provided on the upper mold plate 4, and a plurality of assembly grooves adapted to the upper mold core 1 are provided in the injection grooves, and the injection grooves are connected to the injection channels on the plurality of upper mold cores 1 in the injection grooves; thus, the firmness and stability of the installation of the upper mold core 1 can be ensured.

[0029] In a specific embodiment, an injection plug plate 3 is arranged above the upper mold plate 4, and a plurality of injection plug protrusions corresponding to a plurality of injection grooves are connected to the side of the injection plug plate 3 close to the upper mold plate 4, and the injection plug protrusions are adapted to and slidably matched with the injection grooves; the material can be conveniently poured into the injection groove, and then the injection plug plate 3 pushes the plurality of injection plug protrusions at the same time to extrude the material at the same time, and multiple injection moldings can be performed at the same time, thereby improving work efficiency.

[0030] In a specific embodiment, a No. 1 straight guide column 7 is installed on the side of the injection plug plate 3 close to the upper template 4, and a No. 1 positioning guide sleeve 8 matched with the No. 1 straight guide column 7 is installed on the upper template 4; a No. 2 straight guide column 9 is installed on the side of the lower template 6 close to the upper template 4, and a No. 2 positioning guide sleeve 11 matched with the No. 2 straight guide column 9 is installed on the upper template 4, and a lifting ear 10 is connected to the upper template 4; the positioning between the injection plug plate 3 and the upper template 4 can be ensured by the cooperation between the No. 1 straight guide column 7 and the No. 1 positioning guide sleeve 8, and the positioning between the upper template 3 and the lower template 6 can be ensured by the cooperation between the No. 2 straight guide column 9 and the No. 2 positioning guide sleeve 11, and the lifting ear 10 can conveniently control the lifting and lowering of the upper template 4.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mold for a dust cover of a steering tie rod joint, It is characterized in that The mold assembly comprises an upper mold plate (4), a lower mold plate (6) and a half mold (5), wherein an upper mold core (1) is mounted on the upper mold plate (4), and a lower mold core (2) is mounted on the lower mold plate (6). A plurality of mold cavities are formed on the half mold (5), and a lower mold core (2) is mounted in the mold cavity. A lower mold cavity is formed between the lower mold core (2) and the half mold (5). An upper mold core (1) is arranged on the lower mold core (2). An upper mold cavity connected to the lower mold cavity and an injection channel connected to the upper mold cavity are formed between the upper mold core (1) and the lower mold core (2). The discharge port of the injection channel is connected to the inner wall of the upper mold cavity. An injection channel connected to the injection channel is penetrated and opened on the upper mold core (1); The injection channel is cross-shaped, and the discharge port of the injection channel is a thin-diameter channel, the diameter of the thin-diameter channel is smaller than the diameter of the injection channel, and the thin-diameter channel is connected to the upper mold cavity; The half (5) is provided with a plurality of thin connecting grooves (12) corresponding one to one with the plurality of mold cavities, and the thin connecting grooves (12) are connected with the mold cavities; The half (5) is provided with a freezing groove (13) which is connected to the thin connecting groove (12); The lower mold plate (6) is provided with a mounting groove adapted to the lower mold core (2), and the bottom of the lower mold core (2) can be detachably inserted into the mounting groove; The upper mold plate (4) is provided with a plurality of injection grooves, and the injection grooves are provided with a plurality of assembly grooves adapted to the upper mold core (1), and the injection grooves are connected to the injection channels on the plurality of upper mold cores (1) in the injection grooves; An injection plug plate (3) is arranged above the upper mold plate (4), and a plurality of injection plug protrusions corresponding to a plurality of injection slots are connected to a side of the injection plug plate (3) close to the upper mold plate (4), and the injection plug protrusions are adapted and slidably matched with the injection slots.

2. A mold for a dust cover of a steering tie rod joint according to claim 1, It is characterized in that A No. 1 straight guide column (7) is installed on the side of the injection plug plate (3) close to the upper template (4), and a No. 1 positioning guide sleeve (8) adapted to the No. 1 straight guide column (7) is installed on the upper template (4); a No. 2 straight guide column (9) is installed on the side of the lower template (6) close to the upper template (4), and a No. 2 positioning guide sleeve (11) adapted to the No. 2 straight guide column (9) is installed on the upper template (4), and a lifting ear (10) is connected to the upper template (4).

Images