Chromium plating device for injection-molded electroplated part

Abstract

The utility model discloses an injection-molded electroplated part chromium plating device which comprises an electroplating tank, two groups of electric heating rods are transversely arranged in an inner cavity of the electroplating tank, three groups of electroplating hangers are fixed at the rear side position of the top surface of the electroplating tank, and an electroplating liquid flowing assembly penetrating into the inner cavity of the electroplating tank is arranged on the left side wall of the electroplating tank. The upper fixing ring and the lower fixing ring are pulled by the lead screw to clamp a workpiece to be plated, so that the anode is positioned in the inner hole of the workpiece when the inner hole of the workpiece is subjected to chromium plating, electroplating liquid medicine can smoothly pass through the anode, and the chromium plating effect is ensured; the gas inlet pipe is arranged to be connected with external gas supply equipment, supplied nitrogen is dispersed into the tank body from the U-shaped pipe, an electroplating solution contained in the tank body is stirred, and therefore the electroplating solution on the periphery of the electric heating rod can flow, the electroplating solution is heated more evenly, and the electroplating quality is improved. And the uniformity of a surface plating layer cannot be influenced by non-uniform heat and cold of chromic acid melt during electroplating.

Description

Technical Field

[0001] The utility model relates to the technical field of electroplating chromium equipment, and particularly relates to a chromium plating device for injection-molded electroplated parts. Background Technique

[0002] As a kind of surface treatment process, electroplating chromium aims to deposit chromium as a coating on workpieces, which can improve the strength, hardness and wear resistance of electroplated parts and play a role in preventing scratches. During the chromium plating process, for workpieces with holes inside, the fluidity of the electroplating solution is particularly important. If the fluidity of the electroplating solution is poor, the coating on the surface of the holes inside the workpiece is likely to be uneven. Content of the Utility Model

[0003] The purpose of the utility model is to provide a chromium plating device for injection-molded electroplated parts in view of the deficiencies of the prior art, so as to solve the problems raised in the background technique.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A chromium plating device for injection-molded electroplated parts includes an electroplating bath. Two groups of electric heating rods are horizontally installed in the inner cavity of the electroplating bath. Three electroplating hangers are fixed at the rear position of the top surface of the electroplating bath. An electroplating solution flow component penetrating into the inner cavity of the electroplating bath is arranged on the left side wall of the electroplating bath; the electroplating solution flow component includes an air pump, a U-shaped pipe connected to the air outlet port of the air pump and penetrating into the inner cavity of the electroplating bath, and several groups of one-way air nozzles installed on the top surface of the U-shaped pipe; the electroplating hanger includes a support, a connecting rod fixed on the top of the support, a cross beam fixed at the front end of the connecting rod, and 4-5 groups of inner hole workpiece fixing parts hung on the cross beam.

[0006] Among them, the inner hole workpiece fixing part includes a support plate, a fixing block fixed on the lower surface of the support plate, a lead screw rotatably connected to the lower surface of the fixing block, and a nut movably arranged on the outer ring of the lead screw. An upper fixing ring is fixed at the rear side of the fixing block, a lower fixing ring is fixed at the rear side of the nut, and an inner hole workpiece is clamped between the upper fixing ring and the lower fixing ring. An anode penetrating through the lower fixing ring, the upper fixing ring and the inner hole workpiece is arranged on the bottom surface of the support plate.

[0007] As a preferred scheme of the chromium plating device for injection-molded electroplated parts, hooks are hung on both the left and right sides of the top surface of the cross beam. A back plate is fixed on the bottom surface of the hook. The rear end of the support plate is fixedly connected to the front surface of the back plate.

[0008] As a preferred scheme of the chromium plating device for injection-molded electroplated parts, a threaded hole mutually adapted to the outer thread of the lead screw is opened inside the nut, and circular holes larger than the inner diameter of the inner hole workpiece are opened in both the upper fixing ring and the lower fixing ring.

[0009] As a preferred solution of the chrome plating device for injection molded electroplated parts, there is no contact between the outer surface of the anode and the inner side wall of the inner hole workpiece, and it is used to supply the electroplating solution to flow between the inner hole workpiece and the anode.

[0010] As a preferred solution of the chrome plating device for injection molded electroplated parts, the air inlet end of the air pump is connected to a nitrogen cylinder through an air pipe, and the side wall of the air pump housing is locked to the left side wall of the electroplating tank by screws.

[0011] As a preferred solution of the chrome plating device for injection molded electroplated parts, a plurality of through holes for installing one-way air nozzles are provided on the top surface of the U-shaped pipe located in the inner cavity of the electroplating tank. Among them, the U-shaped pipe is integrally U-shaped and surrounds the electric heating rod.

[0012] Advantages of the present utility model:

[0013] The present utility model clamps the workpiece to be plated by the upper and lower fixing rings through the lead screw. When chrome plating the inner hole of the workpiece, the anode is located in the inner hole of the workpiece, ensuring that the electroplating liquid medicine can pass through smoothly, ensuring the chrome plating effect; by providing an air inlet pipe to connect to an external air supply device, the supplied nitrogen is dispersed from the U-shaped pipe into the tank body, stirring the electroplating solution contained in the tank body, so that the electroplating solution around the electric heating rod can flow, making the electroplating solution heat more evenly, and the surface plating uniformity will not be affected due to uneven heat of the chromic acid melt during electroplating. Brief description of the drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic diagram of the overall structure of the chrome plating device for injection molded electroplated parts described in the present utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the electroplating fixture described in the present utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the inner hole workpiece fixing member described in the present utility model.

[0018] Figure 4 It is a schematic diagram of the structure of the electroplating solution flow assembly described in the present utility model.

[0019] In the figure:

[0020] 1. Electroplating bath; 2. Electroplating solution flow assembly; 21. Air pump; 22. One-way air nozzle; 23. U-shaped pipe; 3. Electroplating fixture; 31. Support; 32. Connecting rod; 33. Cross beam; 34. Hook; 35. Back plate; 36. Inner hole workpiece fixing piece; 361. Support plate; 362. Fixed block; 363. Lead screw; 364. Nut; 365. Lower fixing ring; 366. Anode; 367. Inner hole workpiece; 368. Upper fixing ring; 4. Electric heating rod. Detailed implementation manner

[0021] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0022] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation of this patent; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0023] In the accompanying drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] In the description of the present utility model, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] As Figure 1 shown, the present utility model provides a chromium plating device for injection molded electroplated parts, including an electroplating bath 1. Two groups of electric heating rods 4 are horizontally installed in the inner cavity of the electroplating bath 1. Three electroplating fixtures 3 are fixed at the rear position of the top surface of the electroplating bath 1. An electroplating solution flow assembly 2 penetrating into the inner cavity of the electroplating bath 1 is arranged on the left side wall of the electroplating bath 1;

[0026] As shown Figure 4 in the figure, the electroplating solution flow assembly 2 of this embodiment specifically includes an air pump 21, a U-shaped pipe 23 connected to the air outlet port of the air pump 21 and penetrating into the inner cavity of the electroplating bath 1, and several groups of one-way air nozzles 22 installed on the top surface of the U-shaped pipe 23. The intake end of the air pump 21 is connected to a nitrogen cylinder through a trachea, and the side wall of the housing of the air pump 21 is locked to the left side wall of the electroplating bath 1 by screws. A plurality of through holes for installing the one-way air nozzles 22 are provided on the top surface of the U-shaped pipe 23 located in the inner cavity of the electroplating bath 1. Among them, the U-shaped pipe 23 is integrally U-shaped and surrounds the electric heating rod 4.

[0027] As shown Figure 2 in the figure, the electroplating fixture 3 of this embodiment specifically includes a support 31, a connecting rod 32 fixed to the top of the support 31, a cross beam 33 fixed to the front end of the connecting rod 32, and 4-5 groups of inner hole workpiece fixing members 36 hung on the cross beam 33;

[0028] As shown Figure 3 in the figure, the inner hole workpiece fixing member 36 specifically includes a support plate 361, a fixing block 362 fixed to the lower surface of the support plate 361, a lead screw 363 rotatably connected to the lower surface of the fixing block 362, and a nut 364 movably arranged on the outer ring of the lead screw 363. A upper fixing ring 368 is fixed to the rear side of the fixing block 362, a lower fixing ring 365 is fixed to the rear side of the nut 364, and an inner hole workpiece 367 is clamped between the upper fixing ring 368 and the lower fixing ring 365. An anode 366 penetrating through the lower fixing ring 365, the upper fixing ring 368 and the inner hole workpiece 367 is arranged on the bottom surface of the support plate 361.

[0029] As shown Figure 2 in the figure, hooks 34 are hung on both the left and right sides of the top surface of the cross beam 33. A back plate 35 is fixed to the bottom surface of the hook 34. The rear end of the support plate 361 is fixedly connected to the front side surface of the back plate 35.

[0030] Specifically, a threaded hole adapted to the outer thread of the lead screw 363 is provided inside the nut 364 of this embodiment, and circular holes larger than the inner diameter of the inner hole workpiece 367 are provided inside both the upper fixing ring 368 and the lower fixing ring 365; there is no contact between the outer surface of the anode 366 and the inner side wall of the inner hole of the inner hole workpiece 367, and it is used for the electroplating solution to flow between the inner hole workpiece 367 and the anode 366.

[0031] According to the above-mentioned preferred technical solution, the working process of this technical solution is described as follows:

[0032] When the chromium plating device for injection-molded electroplated parts of the present utility model is in use, first, the posture of the lower fixing ring 365 is stabilized, and the lead screw 363 is rotated to move the nut 364 up and down until the lower fixing ring 365 and the upper fixing ring 368 contact the upper and lower end faces of the inner hole workpiece 367. At this time, the anode 366 is located in the hole inside the inner hole workpiece 367. After the electroplating solution is heated and electrified, the electroplating solution will flow along the gap between the inner hole workpiece 367 and the anode 366, thereby electroplating the inner wall of the hole inside the inner hole workpiece 367.

[0033] During the electroplating process, the electric heating rod 4 heats the electroplating solution inside the electroplating tank 1. The air pump 21 pumps nitrogen into the U-shaped pipe 23 and disperses it into the electroplating tank 1 through the one-way air nozzle 22 inside the U-shaped pipe 23, causing the electroplating solution to surge upward under the influence of the gas, thereby enhancing the fluidity of the electroplating solution, enabling the electroplating solution around the electric heating rod 4 to flow, making the electroplating solution heat more evenly, and preventing the unevenness of the surface coating from being affected by the uneven temperature of the chromic acid solution during electroplating.

[0034] It should be noted that the above specific embodiments are only the preferred embodiments of the present utility model and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can be made to the present utility model. However, as long as these transformations do not deviate from the spirit of the present utility model, they should be within the protection scope of the present utility model. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. An electroplating chromium device for injection-molded electroplated parts, characterized in that, It includes an electroplating bath (1). Two groups of electric heating rods (4) are horizontally installed in the inner cavity of the electroplating bath (1). Three electroplating fixtures (3) are fixed at the rear position of the top surface of the electroplating bath (1). An electroplating solution flow assembly (2) that penetrates into the inner cavity of the electroplating bath (1) is arranged on the left side wall of the electroplating bath (1). The electroplating solution flow assembly (2) includes an air pump (21), a U-shaped pipe (23) connected to the air outlet port of the air pump (21) and penetrating into the inner cavity of the electroplating bath (1), and several groups of one-way air nozzles (22) installed on the top surface of the U-shaped pipe (23). The electroplating fixture (3) includes a support (31), a connecting rod (32) fixed on the top of the support (31), a cross beam (33) fixed at the front end of the connecting rod (32), and 4 - 5 groups of inner hole workpiece fixing parts (36) hung on the cross beam (33). Among them, the inner hole workpiece fixing part (36) includes a support plate (361), a fixing block (362) fixed on the lower surface of the support plate (361), a lead screw (363) rotatably connected to the lower surface of the fixing block (362), and a nut (364) movably arranged on the outer circle of the lead screw (363). An upper fixing ring (368) is fixed at the rear side of the fixing block (362), a lower fixing ring (365) is fixed at the rear side of the nut (364), and an inner hole workpiece (367) is clamped between the upper fixing ring (368) and the lower fixing ring (365). An anode (366) that penetrates through the lower fixing ring (365), the upper fixing ring (368), and the inner hole workpiece (367) is arranged on the bottom surface of the support plate (361).

2. The chrome plating device for injection molded and electroplated parts according to claim 1, wherein, Hooks (34) are hung on both the left and right sides of the top surface of the cross beam (33). A back plate (35) is fixed on the bottom surface of the hook (34). The rear end of the support plate (361) is fixedly connected to the front side surface of the back plate (35).

3. The chrome plating device for injection molded and electroplated parts according to claim 1, characterized in that, A threaded hole that is mutually adapted to the outer thread of the lead screw (363) is formed inside the nut (364). Round holes larger than the inner diameter of the inner hole workpiece (367) are formed inside both the upper fixing ring (368) and the lower fixing ring (365).

4. The chrome plating device for injection molded and electroplated parts according to claim 1, characterized in that, There is no contact between the outer surface of the anode (366) and the inner side wall of the inner hole of the inner hole workpiece (367), which is used to allow the electroplating solution to flow between the inner hole workpiece (367) and the anode (366).

5. The chrome plating device for injection-molded electroplated parts according to claim 1, characterized in that, The air inlet end of the air pump (21) is connected to a nitrogen cylinder through a trachea, and the side wall of the housing of the air pump (21) is locked on the left side wall of the electroplating bath (1) by screws.

6. The chrome plating device for injection-molded electroplated parts according to claim 1, characterized in that, A number of through holes for installing the one-way air nozzles (22) are formed on the top surface of the U-shaped pipe (23) located in the inner cavity of the electroplating bath (1). Among them, the U-shaped pipe (23) is integrally U-shaped and surrounds the electric heating rod (4).

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