A piston housing injection mold for automobile air spring

Abstract

The utility model relates to an injection mold for a piston housing of an automobile air spring, comprising a movable mold assembly and a fixed mold assembly which cooperate with each other and are arranged front and back, wherein the movable mold assembly comprises a movable die block, a movable mold core embedded in the rear side of the movable die block, and a feed plate fixed at the front side of the movable die block; the fixed mold assembly comprises a fixed die block which cooperates with the movable die block, a fixed mold core embedded in the front side of the fixed die block and cooperates with the movable mold core, a bottom plate fixed at the rear side of the fixed die block, and an ejection mechanism arranged between the fixed die block and the bottom plate; a first inner molding block and a second inner molding block and a third inner molding block which are respectively arranged at the upper and lower sides of the first inner molding block are formed outwardly on the front side outer wall of the fixed mold core, and a fourth inner molding block and a fifth inner molding block are respectively formed between the first inner molding block and the second inner molding block and the third inner molding block; the utility model simplifies the operation steps to improve the processing efficiency, and effectively improves the processing qualification rate.

Description

Technical Field

[0001] The utility model relates to an injection mold for a piston housing of an automobile air spring. Background Art

[0002] The chassis suspension of the car is equipped with air springs for shock absorption. The air spring is filled with compressed air in a sealed container and uses the compressibility of gas to achieve its elastic effect. The component used to compress the air in the air spring is the piston, which is installed in a matching housing. Most of the current piston housings are injection molded parts.

[0003] Since the piston housing is assembled from two symmetrical parts, in order to increase the firmness of the assembly, multiple metal sleeves for connection need to be embedded in the joints of the two parts. However, the existing piston housing injection mold has a single function and can only form the structure of the main body. The metal sleeve must be embedded in the two parts after injection molding, and a corresponding press-fitting process must be arranged separately. Therefore, the operation steps are relatively cumbersome, resulting in low processing efficiency. Moreover, the metal sleeve can easily cause damage to the parts during the press-fitting process, resulting in a low processing qualification rate, which needs further improvement. Utility Model Content

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a piston housing injection mold for automobile air springs which simplifies the operation steps to improve the processing efficiency and effectively improves the processing qualification rate.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an injection mold for a piston housing of an automobile air spring, comprising a movable mold assembly and a fixed mold assembly that cooperate with each other and are arranged front and back, the movable mold assembly comprising a movable die block, a movable mold core embedded in the rear side of the movable die block, and a feed plate fixed to the front side of the movable die block; the fixed mold assembly comprises a fixed die block that cooperates with the movable die block, a fixed mold core embedded in the front side of the fixed die block and cooperates with the movable mold core, a bottom plate fixed to the rear side of the fixed die block, and an ejection mechanism arranged between the fixed die block and the bottom plate, characterized in that:

[0006] The front outer wall of the fixed mold core is formed with a first inner forming block and a second inner forming block and a third inner forming block respectively arranged on the upper and lower sides of the first inner forming block, and a fourth inner forming block and a fifth inner forming block are respectively formed between the first inner forming block and the second inner forming block and the third inner forming block; the front side of the fixed mold core is also plugged with a plurality of first locating pins arranged transversely;

[0007] A main molding cavity is formed on the rear outer wall of the movable mold core, and a first outer molding block and a second outer molding block are formed on the bottom surface of the main molding cavity, which are respectively distributed up and down. A secondary molding cavity is also formed on the lower inner wall of the main molding cavity, a second secondary molding cavity is formed on the rear outer wall of the first outer molding block, and a third secondary molding cavity is formed on the rear outer wall of the second outer molding block;

[0008] A side forming assembly is also provided between the movable module and the fixed module, the side forming assembly comprising a slider movably connected to the front side of the fixed module to have a left-right translation function and located on the left side of the fixed mold core, a traction rod obliquely inserted in the slider, a seat block fixed to the right side of the slider, a side forming block fixed to the right side of the seat block, and two second positioning pins laterally inserted and fixed in the side forming block, the front end of the traction rod is fixed on the movable module, and the right ends of the two second positioning pins both extend to the right side outside of the side forming block;

[0009] A limiting notch groove that cooperates with the seat block is provided at the left rear corner of the movable mold core, a guiding notch groove that cooperates with the root of the side forming block is provided at the rear edge of the bottom surface of the limiting notch groove, and a positioning groove that cooperates with the end of the side forming block is provided between the bottom surface of the guiding notch groove and the left inner wall of the main forming cavity.

[0010] Preferably, a plurality of first corner grooves arranged sequentially from top to bottom are formed at the left and right corners of the end of the fourth inner forming block, and a plurality of second corner grooves arranged sequentially from top to bottom are formed at the right corner of the end of the fifth inner forming block.

[0011] Preferably, a plurality of recessed grooves are formed on the end surface of the second inner forming block.

[0012] Preferably, a plurality of first rib plate grooves distributed sequentially from left to right are opened at the bottom lower corner of the second auxiliary molding cavity, and a plurality of side rib grooves distributed sequentially from top to bottom are opened on the right inner wall of the second auxiliary molding cavity.

[0013] Preferably, a plurality of main rib grooves distributed sequentially from left to right are formed on the bottom surface of the third auxiliary molding cavity.

[0014] Preferably, a plurality of second corner grooves distributed sequentially from left to right are provided at the upper corner of the bottom of the auxiliary molding cavity.

[0015] Preferably, a laterally distributed dividing groove is formed at the end of the side forming block, and the dividing groove divides the end of the side forming block into two sixth inner forming blocks distributed vertically.

[0016] Preferably, a countersunk hole is provided on the end of each of the sixth inner forming blocks, a through hole is provided between the bottom center of the two countersunk holes and the root outer wall of the side forming block, and the two second positioning pins are respectively inserted and fixed in the two through holes.

[0017] Compared with the prior art, the utility model has the advantage that: the utility model can embed each metal sleeve used for connection into the piston housing at one time during the injection molding process, so there is no need to arrange a separate press-fitting process of the metal sleeve after injection molding, thereby simplifying the operation steps to improve the processing efficiency, and completely avoiding the damage of the piston housing during the press-fitting of the metal sleeve, thereby effectively improving the processing qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the exploded structural diagram of the right front side of the utility model;

[0019] Figure 2 It is a left rear structural diagram of the movable mold core of the utility model;

[0020] Figure 3 This is an internal structural diagram of the piston housing of the utility model;

[0021] Figure 4 This is an external structural diagram of the piston housing of the utility model. DETAILED DESCRIPTION

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0024] like Figures 1 to 4As shown, a piston housing injection mold for an automobile air spring comprises a movable mold assembly and a fixed mold assembly which cooperate with each other and are arranged front and back, wherein the movable mold assembly comprises a movable die block 2, a movable mold core 3 embedded in the rear side of the movable die block 2, and a feed plate 1 fixed to the front side of the movable die block 2; the fixed mold assembly comprises a fixed die block 4 which cooperates with the movable die block 2, a fixed mold core 5 which is embedded in the front side of the fixed die block 4 and cooperates with the movable mold core 3, a bottom plate 6 fixed to the rear side of the fixed die block 4, and an ejection mechanism 7 arranged between the fixed die block 4 and the bottom plate 6;

[0025] A first inner forming block 51 and a second inner forming block 52 and a third inner forming block 53 are formed outwardly on the front outer wall of the fixed mold core 5, and a fourth inner forming block 54 and a fifth inner forming block 55 are formed between the first inner forming block 51 and the second inner forming block 52 and the third inner forming block 53, respectively; a plurality of first locating pins 11 arranged transversely are also inserted on the front side of the fixed mold core 5;

[0026] A main molding cavity 31 is formed on the rear outer wall of the movable mold core 3, and a first outer molding block 32 and a second outer molding block 33 are formed on the bottom surface of the main molding cavity 31, and are respectively distributed up and down. A secondary molding cavity 36 is also formed on the lower inner wall of the main molding cavity 31, a second secondary molding cavity 34 is formed on the rear outer wall of the first outer molding block 32, and a third secondary molding cavity 35 is formed on the rear outer wall of the second outer molding block 33;

[0027] A side forming assembly 8 is also provided between the moving module 2 and the fixed module 4. The side forming assembly 8 includes a slider 81 movably connected to the front side of the fixed module 4 to have a left-right translation function and located on the left side of the fixed mold core 5, a traction rod 82 obliquely inserted in the slider 81, a seat block 83 fixed to the right side of the slider 81, a side forming block 84 fixed to the right side of the seat block 83, and two second positioning pins 85 transversely inserted and fixed in the side forming block 84. The front end of the traction rod 82 is fixed on the moving module 2, and the right ends of the two second positioning pins 85 both extend to the right side of the side forming block 84.

[0028] A limiting notch groove 37 that cooperates with the seat block 83 is provided at the left rear corner of the movable mold core 3, a guiding notch groove 38 that cooperates with the root of the side forming block 84 is provided at the rear edge of the bottom surface of the limiting notch groove 37, and a positioning groove 39 that cooperates with the end of the side forming block 84 is provided between the bottom surface of the guiding notch groove 38 and the left inner wall of the main forming cavity 31.

[0029] A plurality of first corner grooves 56 arranged sequentially from top to bottom are formed at the left and right corners of the end of the fourth inner forming block 54 , and a plurality of second corner grooves 57 arranged sequentially from top to bottom are formed at the right corner of the end of the fifth inner forming block 55 .

[0030] A plurality of recesses 58 are formed on the end surface of the second inner forming block 52 .

[0031] A plurality of first rib plate grooves 310 distributed sequentially from left to right are formed at the bottom lower corner of the second auxiliary molding cavity 34 , and a plurality of side rib grooves 311 distributed sequentially from top to bottom are formed on the right inner wall of the second auxiliary molding cavity 34 .

[0032] A plurality of main rib grooves 312 are arranged on the bottom surface of the third auxiliary molding cavity 35 and are sequentially distributed from left to right.

[0033] A plurality of second corner grooves 313 are formed at the upper corner of the bottom of the auxiliary molding cavity 36 and are distributed sequentially from left to right.

[0034] A laterally distributed dividing groove 841 is provided at the end of the side forming block 84, and the dividing groove 841 divides the end of the side forming block 84 into two sixth inner forming blocks 842 distributed vertically. A countersunk hole 843 is provided at the end of each sixth inner forming block 842, and a through hole 844 is provided between the bottom center of the two countersunk holes 843 and the root outer wall of the side forming block 84, and two second positioning pins 85 are respectively inserted and fixed in the two through holes 844.

[0035] Working principle:

[0036] The feed plate 1 and the bottom plate 6 are respectively installed on the action mechanism and the body of the injection molding machine; the feed plate 1 is driven to move backward by means of the action mechanism, and then the moving module 2 is driven to move toward the fixed module 4 until the two are assembled with each other, so that the first inner molding block 51, the second inner molding block 52, the third inner molding block 53, the fourth inner molding block 54 and the fifth inner molding block 55 on the fixed mold core 5 are all extended into the main molding cavity 31 on the movable mold core 3 (existing technology); when the movable module 2 moves backward, it will drive the traction rod 82 of the side molding assembly 8 to move backward to force the slider 81 to move to the right until the end of the side molding block 84 passes through the positioning groove 39 and extends into the interior of the second auxiliary molding cavity 34; before the above process, a metal sleeve 10 needs to be sleeved on the end of each first positioning pin 11 and each second positioning pin 85.

[0037] Afterwards, the molten material enters the movable module 2 through the gate provided in the feed plate 1, and then enters the main molding cavity 31 through the runner provided in the movable module 2 and wraps the first inner molding block 51, the second inner molding block 52, the third inner molding block 53, the fourth inner molding block 54 and the fifth inner molding block 55, and the piston housing 9 is formed after cooling; then, the feed plate 1 is driven to move forward with the help of the action mechanism, thereby driving the movable module 2 away from the fixed module 4, so that the movable mold core 3 is separated from the fixed mold core 5, and then the molded piston housing 9 is ejected forward with the help of the ejection mechanism 7 (prior art); in the process of moving forward, the movable module 2 will force the slider 81 to move in the opposite direction to reset with the help of the traction rod 82 in the same way.

[0038] The first inner molding block 51, the second inner molding block 52, the third inner molding block 53, the fourth inner molding block 54 and the fifth inner molding block 55 respectively form a first structural cavity 91, a second structural cavity 92, a third structural cavity 93, a fourth structural cavity 94 and a fifth structural cavity 95 inside the piston housing 9; each first corner groove 56 forms a corresponding first corner rib 96 inside the piston housing 9, and each second corner groove 57 forms a corresponding second corner rib 97 inside the piston housing 9; each recessed groove 58 forms a corresponding protrusion 98 inside the piston housing 9.

[0039] The second outer molding block 33 forms a first convex cavity 99 and a second convex cavity 910 on the outside of the piston housing 9, the second auxiliary molding cavity 34 forms a first step cavity 912 on the outside of the piston housing 9, and the auxiliary molding cavity 36 forms a second step cavity 911 on the outside of the piston housing 9. A plurality of first rib plate grooves 310 form a plurality of first reinforcing ribs 913 between the second step cavity 911 and the first convex cavity 99, a plurality of main rib grooves 312 form a plurality of connecting ribs 914 between the first convex cavity 99 and the second convex cavity 910, and a plurality of second corner grooves 313 form a plurality of second reinforcing ribs 915 between the second convex cavity 910 and the second step cavity 911.

[0040] The root of the side molding block 84 cooperates with the inner wall of the guide notch groove 38 to form a cover 916 on the left side of the piston housing 9, and the partition groove 841 on the side molding block 84 forms a partition plate 917 inside the cover 916. The two countersunk holes 843 form two bosses 918 inside the cover 916, and the metal sleeves 10 located on the two second positioning pins 85 are respectively embedded in the two bosses 918; each of the remaining metal sleeves 10 is embedded inside the rear side of the piston housing 9.

[0041] The utility model can embed each metal sleeve 10 for connection into the piston housing 9 at one time during the injection molding process, so there is no need to arrange a separate press-fitting process of the metal sleeve after injection molding, thereby simplifying the operation steps to improve the processing efficiency, and completely avoiding the piston housing 9 from being damaged during the press-fitting of the metal sleeve 10, thereby effectively improving the processing qualification rate.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An injection mold for a piston housing of an automobile air spring, comprising a movable mold assembly and a fixed mold assembly which cooperate with each other and are arranged front and back, the movable mold assembly comprising a movable die block, a movable mold core embedded in the rear side of the movable die block, and a feed plate fixed to the front side of the movable die block; the fixed mold assembly comprises a fixed die block which cooperates with the movable die block, a fixed mold core embedded in the front side of the fixed die block and cooperates with the movable mold core, a bottom plate fixed to the rear side of the fixed die block, and an ejection mechanism arranged between the fixed die block and the bottom plate, characterized in that: The front outer wall of the fixed mold core is formed with a first inner forming block and a second inner forming block and a third inner forming block respectively arranged on the upper and lower sides of the first inner forming block, and a fourth inner forming block and a fifth inner forming block are respectively formed between the first inner forming block and the second inner forming block and the third inner forming block; the front side of the fixed mold core is also plugged with a plurality of first locating pins arranged transversely; A main molding cavity is formed on the rear outer wall of the movable mold core, and a first outer molding block and a second outer molding block are formed on the bottom surface of the main molding cavity, which are respectively distributed up and down. A secondary molding cavity is also formed on the lower inner wall of the main molding cavity, a second secondary molding cavity is formed on the rear outer wall of the first outer molding block, and a third secondary molding cavity is formed on the rear outer wall of the second outer molding block; A side forming assembly is also provided between the movable module and the fixed module, the side forming assembly comprising a slider movably connected to the front side of the fixed module to have a left-right translation function and located on the left side of the fixed mold core, a traction rod obliquely inserted in the slider, a seat block fixed to the right side of the slider, a side forming block fixed to the right side of the seat block, and two second positioning pins laterally inserted and fixed in the side forming block, the front end of the traction rod is fixed on the movable module, and the right ends of the two second positioning pins both extend to the right side outside of the side forming block; A limiting notch groove that cooperates with the seat block is provided at the left rear corner of the movable mold core, a guiding notch groove that cooperates with the root of the side forming block is provided at the rear edge of the bottom surface of the limiting notch groove, and a positioning groove that cooperates with the end of the side forming block is provided between the bottom surface of the guiding notch groove and the left inner wall of the main forming cavity.

2. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: A plurality of first corner grooves arranged sequentially from top to bottom are formed at the left and right corners of the end of the fourth inner forming block, and a plurality of second corner grooves arranged sequentially from top to bottom are formed at the right corner of the end of the fifth inner forming block.

3. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: A plurality of recessed grooves are formed on the end surface of the second inner forming block.

4. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: A plurality of first rib plate grooves distributed sequentially from left to right are opened at the bottom lower corner of the second auxiliary molding cavity, and a plurality of side rib grooves distributed sequentially from top to bottom are opened on the right inner wall of the second auxiliary molding cavity.

5. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: A plurality of main rib grooves are arranged on the bottom surface of the third auxiliary forming cavity and are distributed sequentially from left to right.

6. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: A plurality of second corner grooves are arranged at the upper corner of the bottom of the auxiliary molding cavity and are distributed sequentially from left to right.

7. The piston housing injection mold for an automobile air spring according to claim 1, characterized in that: The end of the side forming block is provided with a transversely distributed dividing groove, and the dividing groove divides the end of the side forming block into two sixth inner forming blocks distributed up and down.

8. The piston housing injection mold for an automobile air spring according to claim 7, characterized in that: A countersunk hole is provided on the end of each of the sixth inner forming blocks, a through hole is provided between the bottom center of the two countersunk holes and the root outer wall of the side forming block, and the two second positioning pins are respectively inserted and fixed in the two through holes.

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