Bushing embedding injection molding anti-vibration and anti-falling structure
By designing the adjustment mechanism and steel ball structure in the injection mold, the problem of difficulty in fixing the bushing when fitting the needle is solved, effectively fixing the bushing is achieved, preventing it from falling off, and improving product quality and output.
Patent Information
- Application Number
- CN202323539964.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-25
AI Technical Summary
In the existing injection mold design, when the bushing is inserted into the inlay needle, the steel ball is in an outward expansion state on the inner wall of the bushing, making it difficult to fit the bushing, affecting the product quality.
A bushing buried injection molded shock-proof shedding structure is designed. By setting up an adjustment mechanism on the inlay body, including a screw, an adjustment handle and a conical extrusion block, the bushing is fixed by using the elastic tensioning friction force of the steel ball. And the steel ball is gradually separated and expanded by conical extrusion blocks, which is close to the outer wall of the bushing to prevent falling off.
It effectively prevents the bushing from falling off caused by vibration and inertia during mold clamping, ensures the quality of the finished product and improves the quality and output of the product.
Smart Images
Figure CN222451128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molding, in particular to a bushing embedded injection molding shock-proof falling-off structure. Background Art
[0002] The bushing embedded injection molding shockproof fall-off structure is a special injection mold design, and its main purpose is to ensure that the bushing will not fall off from the predetermined position during the injection molding process. This structure can effectively avoid product quality problems caused by missing bushings, such as plastic filling the original bushing position, resulting in abnormal quality of the die and product plastic PIN. The principle is that the steel ball squeezes the inner wall of the bushing to increase the tensioning friction, thereby ensuring that the bushing is not easy to fall off. However, when the bushing is inserted into the pin, the steel ball is in an outward expansion state on the inner wall of the bushing for a while, which makes it difficult to insert the bushing. For this reason, we proposed the bushing embedded injection molding shockproof fall-off structure. Utility Model Content
[0003] 1. Technical issues to be solved
[0004] In view of the deficiencies in the prior art, the utility model provides a bushing embedded injection-molded shock-proof falling-off structure to solve the above-mentioned problems.
[0005] (II) Technical solution
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bushing embedded injection-molded shock-proof fall-off structure, comprising a base, a headless screw is fixedly installed at the top of the base corresponding to the center of the circle, a vertical sleeve is sleeved on the outer wall of the headless screw at the top of the base corresponding to the top of the circle, a spring is fixedly connected to the top of the headless screw, a cylinder is slidably connected to the inner wall of the sleeve, a vertical spring pin is fixedly connected to the top center of the cylinder, a vertical pin body is fixedly connected to the top inner wall of the sleeve, a bushing is sleeved on the outer wall of the pin body, and an adjustment mechanism is arranged on the pin body.
[0007] Preferably, the adjustment mechanism includes a screw rod, an adjustment handle and a conical extrusion block, a vertical screw rod is threadedly connected at the top center of the needle body, an adjustment handle for adjusting the screw rod is fixedly connected to the top of the screw rod, and the bottom end of the screw rod extends to the interior of the needle body and is fixedly connected to the conical extrusion block.
[0008] Preferably, the bottom of the sleeve is provided with three groups of steel ball grooves arranged in an equilateral triangle, steel balls are movably installed in the steel ball grooves, and the top of the sleeve is provided with an extrusion groove directly below the conical extrusion block and in the gap between the three groups of steel ball grooves.
[0009] Preferably, the bottom end of the conical extrusion block is movably engaged in the extrusion groove, and the extrusion groove and the conical extrusion block are adapted to each other.
[0010] Preferably, a clamping groove penetrating to the outer wall of the needle inserting body is opened at the position of the inner wall of the needle inserting body corresponding to the three groups of steel ball grooves.
[0011] Preferably, the outer wall of the cylinder and the inner wall of the sleeve are in contact with each other, and the bottom of the cylinder is fixedly connected to the top of the spring.
[0012] (III) Beneficial effects
[0013] Compared with the prior art, the utility model provides a bushing embedded injection molding anti-vibration and fall-off structure, which has the following features:
[0014] Beneficial effects:
[0015] 1. The bushing is embedded in the injection molding shock-proof fall-off structure. The screw rod is driven to rotate on the insert pin body by turning the adjustment handle. The screw rod is made to descend during the rotation process by the thread on the screw rod. When the conical extrusion block descends, the bottom of the conical extrusion block gradually separates the three groups of steel balls through the gaps between the three groups of steel balls, so that the three groups of steel balls fit tightly to the inner wall of the bushing through the slots. This device has a good fixing effect and effectively prevents the bushing from being thrown off by vibration, inertia and centrifugal force during the mold closing process, thereby ensuring the quality of the finished product and improving the quality and output of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a front schematic diagram of the utility model;
[0017] Figure 2 It is a cross-sectional schematic diagram of the sleeve and bushing of the utility model;
[0018] Figure 3 This is a schematic cross-sectional view of the needle body of the utility model;
[0019] Figure 4 This is a schematic diagram of the steel ball groove structure of the utility model.
[0020] In the figure: 1. base; 2. sleeve; 3. headless screw; 4. spring; 5. cylinder; 6. spring pin; 7. needle body; 8. steel ball groove; 9. steel ball; 10. screw rod; 11. adjustment handle; 12. slot; 13. bushing; 14. conical extrusion block; 15. extrusion groove. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-4 The bushing is embedded in the injection-molded shock-proof fall-off structure, including a base 1, a headless screw 3 is fixedly installed at the top of the base 1 corresponding to the center of the circle, a vertical sleeve 2 is sleeved on the outer wall of the headless screw 3 corresponding to the top of the base 1, a spring 4 is fixedly connected to the top of the headless screw 3, a cylinder 5 is slidably connected to the inner wall of the sleeve 2, a vertical spring pin 6 is fixedly connected at the top center of the cylinder 5, a vertical needle body 7 is fixedly connected to the top inner wall of the sleeve 2, a bushing 13 is sleeved on the outer wall of the needle body 7, and an adjustment mechanism is arranged on the needle body 7.
[0023] The adjusting mechanism comprises a screw rod 10, an adjusting handle 11 and a conical extrusion block 14. A vertical screw rod 10 is threadedly connected at the center of the top of the needle body 7. An adjusting handle 11 for adjusting the screw rod 10 is fixed to the top of the screw rod 10. The bottom end of the screw rod 10 extends to the inside of the needle body 7 and is fixed to the conical extrusion block 14. The elastic tensioning friction of the steel ball 9 is used to fix the bushing 13. When the fixing effect is not ideal, the adjusting handle 11 is rotated to drive the screw rod 10 to rotate on the top of the needle body 7. During the rotation, the screw rod 10 descends on the needle body 7 through the thread on the screw rod 10, and at the same time drives the conical extrusion block 14 at the bottom of the screw rod 10 to descend. The conical extrusion block 14 descends to squeeze the three groups of steel balls 9 on the outer wall of the bottom.
[0024] The bottom of the sleeve 2 is provided with three groups of steel ball grooves 8 arranged in an equilateral triangle, and steel balls 9 are movably installed in the steel ball grooves 8. The top of the sleeve 2 corresponds to the conical extrusion block 14 and is provided with an extrusion groove 15 directly below and in the gap between the three groups of steel ball grooves 8. The cylinder 5 drives the elastic pin 6 at the top to move upward. In the process of the elastic pin 6 rising, the steel balls 9 in the three groups of steel ball grooves 8 are respectively clamped into the three groups of clamping grooves 12, so that the outer wall of the three groups of steel balls 9 of the headless screw fits with the inner wall of the bushing 13.
[0025] The bottom end of the conical extrusion block 14 is movably clamped in the extrusion groove 15, and the extrusion groove 15 and the conical extrusion block 14 are adapted to each other. During the descent of the conical extrusion block 14, the three groups of steel balls 9 are gradually expanded through the gaps between the three groups of steel balls 9, so that the three groups of steel balls 9 slide in the steel ball groove 8 and then fit tightly to the outer wall of the bushing 13 through the clamping groove 12, so as to prevent the bushing 13 from being thrown off by the vibration and inertia centrifugal force during the mold closing action.
[0026] The inner wall of the pin insert body 7 is provided with a slot 12 which penetrates to the outer wall of the pin insert body 7 at the position corresponding to the three groups of steel ball grooves 8. This device has a good fixing effect and effectively prevents the bushing 13 from being thrown off by vibration and inertia and centrifugal force during the mold closing process, thereby ensuring the quality of the finished product and improving the quality and output of the product.
[0027] The outer wall of the cylinder 5 fits with the inner wall of the sleeve 2, and the bottom of the cylinder 5 is fixedly connected to the top of the spring 4. When the device starts to work, the bushing 13 is first assembled and placed on the outer wall of the pin body 7 for positioning. Under the action of the spring 4, the cylinder 5 is squeezed to slide on the inner wall of the sleeve 2.
[0028] Working principle: When the device starts to work, first the bushing 13 is assembled and placed on the outer wall of the needle body 7 for positioning. Under the action of the spring 4, the extrusion cylinder 5 slides on the inner wall of the sleeve 2, and the cylinder 5 drives the top spring pin 6 to move upward. During the rising process of the spring pin 6, the steel balls 9 in the three groups of steel ball grooves 8 are respectively clamped into the three groups of clamping grooves 12, so that the outer wall of the three groups of steel balls 9 of the headless screw fits with the inner wall of the bushing 13. The elastic tensioning friction of the steel balls 9 is used to fix the bushing 13. When the fixing effect is not ideal, the adjusting handle 11 is turned to drive the screw rod 1 0 rotates at the top of the pin body 7. During the rotation, the screw rod 10 descends on the pin body 7 through the thread on the screw rod 10, and at the same time drives the conical extrusion block 14 at the bottom of the screw rod 10 to descend. The conical extrusion block 14 squeezes the three groups of steel balls 9 on the outer wall of the bottom by descending. During the descent of the conical extrusion block 14, the three groups of steel balls 9 are gradually expanded through the gaps between the three groups of steel balls 9, so that the three groups of steel balls 9 slide in the steel ball grooves 8 and then fit tightly to the outer wall of the bushing 13 through the clamping grooves 12, so as to prevent the bushing 13 from being thrown off by the vibration and inertial centrifugal force during the mold closing action.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A bushing embedded injection-molded anti-vibration and fall-off structure, comprising a base (1), characterized in that: A headless screw (3) is fixedly installed at the top of the base (1) at the center of the circle corresponding to the top of the base (1); a vertical sleeve (2) is sleeved on the outer wall of the headless screw (3) at the top of the base (1); a spring (4) is fixedly connected to the top of the headless screw (3); a cylinder (5) is slidably connected to the inner wall of the sleeve (2); a vertical spring pin (6) is fixedly connected to the top center of the cylinder (5); a vertical needle body (7) is fixedly connected to the top inner wall of the sleeve (2); a bushing (13) is sleeved on the outer wall of the needle body (7); and an adjustment mechanism is provided on the needle body (7).
2. The bushing embedded injection molding anti-vibration and fall-off structure according to claim 1 is characterized in that: The adjusting mechanism comprises a screw rod (10), an adjusting handle (11) and a conical extrusion block (14); a vertical screw rod (10) is threadedly connected at the center of the top of the needle body (7); an adjusting handle (11) for adjusting the screw rod (10) is fixedly connected to the top of the screw rod (10); and the bottom end of the screw rod (10) extends into the interior of the needle body (7) and is fixedly connected to the conical extrusion block (14).
3. The bushing embedded injection molding anti-vibration and fall-off structure according to claim 1 is characterized in that: The bottom of the sleeve (2) is provided with three groups of steel ball grooves (8) arranged in an equilateral triangle, and steel balls (9) are movably installed in the steel ball grooves (8). The top of the sleeve (2) is provided with an extrusion groove (15) directly below the conical extrusion block (14) and in the gap between the three groups of steel ball grooves (8).
4. The bushing embedded injection molding anti-vibration and fall-off structure according to claim 3 is characterized in that: The bottom end of the conical extrusion block (14) is movably clamped in the extrusion groove (15), and the extrusion groove (15) and the conical extrusion block (14) are adapted to each other.
5. The bushing embedded injection molding anti-vibration and fall-off structure according to claim 3 is characterized in that: The inner wall of the needle inserting body (7) is provided with a clamping groove (12) which penetrates to the outer wall of the needle inserting body (7) at positions corresponding to the three groups of steel ball grooves (8).
6. The bushing embedded injection molding anti-vibration and fall-off structure according to claim 3 is characterized in that: The outer wall of the cylinder (5) and the inner wall of the sleeve (2) are in contact with each other, and the bottom of the cylinder (5) is fixedly connected to the top of the spring (4).