A universal electric puller for use in the electroplating process of screw heads

Abstract

The invention discloses a universal pull-type electric hanger for use in a screw head electroplating process, which comprises a hanger unit, wherein the hanger unit comprises two hangers that are distributed in a mirror-symmetrical manner, wherein the opposite ends of the two hangers are screw head insertion ends, and a screw head is clamped on each of the two hangers so that the two screw heads are arranged in a mirror-symmetrical manner, and the pointed parts of the two screw heads are directly opposite and close to each other; the advantages are low electroplating cost, low labor intensity and high efficiency.

Description

Technical Field

[0001] The invention relates to an electroplating conductive hanger, in particular to a universal pull-and-draw type hanger used in a screw head electroplating process. Background Art

[0002] The quality of the screw head plays a key role in the quality of the injection molding process of the injection molding machine, and chrome plating in the electroplating process of the screw head is an important part of determining the quality of the screw head.

[0003] The screw head electroplating process mostly adopts the rack plating method, and the rack plating must use the electroplating conductive rack. The structure of the traditional electroplating conductive rack is as follows Figure 1As shown, it includes a transverse frame 100 and a hanger unit 101, the hanger unit 101 clamps a single screw head 109, and the hanger unit 101 is composed of a cathode 102, a cathode mounting hanger 103 for mounting the cathode 102, and an axis-type clamping hanger 104 for clamping the single screw head 109. One end of the cathode mounting hanger 103 is connected to the transverse frame 100 so that the cathode mounting hanger 103 is suspended on the transverse frame 100, and the other end of the cathode mounting hanger 103 is connected to one end of the axis-type clamping hanger 104. The cathode 102 is made of iron material and is in a planar spiral shape. 2 is located directly below the screw head 109, the outer end of the spiral wire of the cathode 102 is integrally connected with the iron wire 105, and the other end of the iron wire 105 is insulated and wound on the cathode mounting hanger 103; when clamping the screw head 109, the cathode 102 is first moved away, and then the top of the screw head 109 is extended from the other end of the shaft-type clamping hanger 104 into the shaft-type clamping hanger 104 and clamped by the shaft-type clamping hanger 104, and then the cathode 102 is moved to the bottom of the screw head 109. After power is turned on, the cathode mounting hanger 103 is also the current introduction end, and the cathode 102 is located directly below the screw head 109 to form a current closed loop. In order to prevent the tip of the screw head 109 after electroplating from burring, being too thick, and other undesirable conditions, this electroplating conductive hanger sets a cathode 102 just below the screw head 109 to provide cathode 102 electrical protection for the screw head 109. However, the introduction of the cathode 102 also causes the following problems: 1) The cathode 102 is a planar spiral wire with an outer diameter not greater than the diameter of the screw head 109, which is manually wound with an iron wire, and the spiral wire is required to be uniform and dense, which makes the manufacture of the cathode 102 relatively difficult and requires professional technicians to complete it manually, resulting in high manufacturing costs for the cathode 102; 2) The cathode 102 is made of iron, and is immersed in the electroplating solution during the electroplating process of the screw head 109. On the one hand, since the screw head 109 is in a The cathode 102 is in the power-on state, so the cathode 102 will be electroplated, wasting energy, resources and efficiency; on the other hand, the iron ions in the cathode 102 will decompose under the action of electroplating, dissolving in the electroplating solution to produce heavy pollutants such as hexavalent chromium. The environmental protection treatment of the contaminated electroplating solution and the cost of replacing the electroplating solution are very expensive, which greatly increases the electroplating cost and increases the labor intensity; 3) The smaller the gap between the tip of the screw head 109 and the cathode 102, the better the electroplating effect. However, since the cathode 102 is made of iron and is extremely soft, the cathode 102 is easily deformed by contact during the process of entering the electroplating tank. If the cathode 102 contacts the tip of the screw head 109, the tip of the screw head 109 will not be electroplated with chromium. In addition, the hanger unit 101 in this electroplating conductive hanger can only clamp a single screw head 109, and can only electroplate one screw head 109 at a time, which is inefficient. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a universal electric pulling hanger used in the electroplating process of a screw head, which has low electroplating cost, low labor intensity and high efficiency.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a universal pull-type electric hanger used in the electroplating process of a screw head, including a hanger unit, characterized in that the hanger unit includes two hangers distributed in a mirror-symmetrical manner, the opposite ends of the two hangers are the screw head insertion ends, and a screw head is clamped on each of the two hangers so that the two screw heads are arranged in a mirror-symmetrical manner, and the pointed parts of the two screw heads are facing and close to each other.

[0006] The hanger unit also includes a vertical support rod, and the two hangers are connected to the same side of the vertical support rod and are distributed in mirror symmetry. The vertical support rods of multiple hanger units can be connected side by side to a horizontal main rod, and multiple screw heads can be electroplated at the same time.

[0007] The two hangers have the same structure, and the hangers are composed of an integrally connected horizontal support rod, a V-shaped clamping block and a locking bolt, one end of the horizontal support rod is connected to the vertical support rod, and the other end of the horizontal support rod is connected to an outer side wall of one side of the V-shaped clamping block, the V-shaped clamping block is provided with a V-shaped groove, and the V-shaped clamping block is integrally provided with a sealing plate for closing the notch of the V-shaped groove, the locking bolt is horizontally screwed on the sealing plate, the end of the locking bolt extends into the V-shaped groove and faces the tip bottom of the V-shaped groove, and the upper part of the screw head extends into the V-shaped groove from the screw head insertion end, and then the locking bolt is tightened so that the end of the locking bolt pushes the upper part of the screw head and thus the radial surface of the upper part of the screw head is in contact with the average line of the two groove walls of the V-shaped groove. The V-shaped clamping block is provided with a V-shaped groove, which can accommodate the upper part of the screw head. When the diameter surface of the upper part of the screw head is in line contact with the two groove walls of the V-shaped groove, the screw head will inevitably be vertical without skewing and will not fall after clamping. The locking bolt installed on the sealing plate is used to push the upper part of the screw head. After the screw head is clamped, the diameter surface of the upper part of the screw head is in line contact with the two groove walls of the V-shaped groove, and the locking bolt is in point contact with the upper part of the screw head, that is, two lines and one point, which not only clamps stably and firmly, but also greatly improves the conductive performance, providing a guarantee for the efficiency and quality of electroplating. During operation, the operator only needs to tighten the locking bolt, even if the upper part of the screw head is placed obliquely in the V-shaped groove, by tightening the locking bolt, the screw head will be automatically corrected, so that the screw head will inevitably be vertical without skewing, the operation requirements are low, the operator does not need to have operating skills, and the labor intensity is low.

[0008] A guide block is provided on the outer side wall of the sealing plate, and the locking bolt is screwed to the guide block. The provision of the guide block makes the process of horizontally tightening or loosening the locking bolt more stable, and at the same time enables the locking bolt to better support the upper part of the screw head, thereby making the clamping of the screw head more stable.

[0009] An insulating cover is provided on the exposed part of the locking bolt located on the outer side of the sealing plate to prevent power loss and prevent the locking bolt from being chrome-plated.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] 1) By distributing two hangers in mirror symmetry, a screw head is clamped on each of the two hangers, and the two screw heads arranged in mirror symmetry realize pulling electricity, thereby realizing a current closed loop and replacing the role of the cathode.

[0012] 2) Since there is no need to make a spiral cathode, only an additional hanger is needed, thus avoiding the manual labor of professional technicians and reducing the overall cost.

[0013] 3) The structure of the two hangers is distributed in a mirror-symmetrical manner, which avoids the spiral cathode from being electroplated and causing waste of energy, resources and efficiency. It also avoids the spiral cathode from being contaminated by electroplating and requiring replacement of the electroplating solution, thereby reducing the electroplating cost, reducing labor intensity, and being more environmentally friendly.

[0014] 4) The positions of the two hangers distributed in mirror symmetry are fixed, so the tip parts of the two screw heads can be close to each other without touching, ensuring the electroplating effect.

[0015] 5) For each hanger unit, since there are two hangers, two screw heads can be clamped at the same time, that is, two screw heads can be electroplated at one time, which is highly efficient.

[0016] 6) Through actual process tests, the electroplating of the screw head of the universal electric pull-type hanger of the present invention is performed, and the electroplating data results fully meet the requirements of the drawings, and the electroplating quality is higher than that of the traditional electroplating conductive hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a single rack unit in a traditional electroplating conductive rack;

[0018] Figure 2 The structure of the universal electric pull hanger (with screw head clamped) of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 3 The structure of the universal electric pull hanger (with screw head clamped) of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 4 It is a partial exploded schematic diagram of the universal electric pull-type hanger (with the screw head clamped) of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] Following the principle of electroplating technology, the electroplating process requires smooth current flow, which requires cathode power pulling, that is, the cathode corresponding to the product is indispensable. Therefore, it is impossible to eliminate the cathode to avoid the disadvantages of the cathode setting in the traditional electroplating conductive hanger. In order to ensure compliance with the basic principles of electroplating and break through the corresponding technical bottleneck, the present invention proposes a universal pull-type power-drawing hanger for the electroplating process of the screw head, such as Figure 2 , Figure 3 and Figure 4 As shown, it includes a hanger unit 200, which includes two hangers 201 that are distributed in a mirror-symmetrical manner. The opposite ends of the two hangers 201 are screw head insertion ends 202. A screw head 300 is clamped on each of the two hangers 201 so that the two screw heads 300 are arranged in a mirror-symmetrical manner. The pointed parts of the two screw heads 300 are facing and close to each other to achieve pulling and drawing electricity. The smaller the gap between the pointed parts of the two screw heads 300, the better, so that the electroplating effect is better.

[0023] In this embodiment, the hanger unit 200 also includes a vertical support rod 203, and two hangers 201 are connected to the same side of the vertical support rod 203 and are distributed in a mirror-symmetrical manner up and down. The vertical support rods 203 of multiple hanger units 200 can be connected side by side to a horizontal main rod (not shown in the figure), and multiple screw heads 300 can be electroplated at the same time.

[0024] In this embodiment, the two hangers 201 have the same structure. The hanger 201 is composed of a horizontal support rod 204, a V-shaped clamping block 205 and a locking bolt 206 connected in one piece. One end of the horizontal support rod 204 is connected to the vertical support rod 203, and the other end of the horizontal support rod 204 is connected to the outer side wall of one side of the V-shaped clamping block 205. The V-shaped clamping block 205 is provided with a V-shaped groove 207, and the V-shaped clamping block 205 is provided with a groove for closing the V-shaped groove 207. The sealing plate 208 of the mouth is provided, and the locking bolt 206 is horizontally screwed on the sealing plate 208. The end of the locking bolt 206 extends into the V-shaped groove 207 and faces the tip bottom of the V-shaped groove 207. After the upper part of the screw head 300 extends into the V-shaped groove 207 from the insertion end 202 of the screw head 300, the locking bolt 206 is tightened so that the end of the locking bolt 206 pushes the upper part of the screw head 300 and thus makes the radial surface of the upper part of the screw head 300 contact the two groove walls of the V-shaped groove 207. The V-shaped clamping block 205 is provided with a V-shaped groove 207, which can accommodate the upper part of the screw head 300. When the diameter surface of the upper part of the screw head 300 is in contact with the two groove walls of the V-shaped groove 207, the screw head 300 will inevitably be vertical without being skewed and will not fall after being clamped. The locking bolt 206 installed on the sealing plate 208 is used to push the upper part of the screw head 300. After the screw head 300 is clamped, the diameter surface of the upper part of the screw head 300 is in contact with the two groove walls of the V-shaped groove 207, and the locking bolt 206 is in point contact with the upper part of the screw head 300, i.e. two lines at one point, which not only ensures stable and firm clamping, but also greatly improves the conductivity, thus providing guarantee for electroplating efficiency and quality; during operation, the operator only needs to tighten the locking bolt 206, even if the upper part of the screw head 300 is placed obliquely into the V-groove 207, by tightening the locking bolt 206, the screw head 300 will be automatically corrected, so that the screw head 300 will inevitably be vertical without skewing, and the operation requirements are low, the operator does not need to have operation skills, and the labor intensity is low. This hanger 201 can be clamped with a variety of screw heads 300 of different sizes within a certain range, and has a wide range of applications. By redesigning the angle of the V-groove 207, it is also suitable for screw heads 300 of extra large sizes and screw heads 300 of extra small sizes.

[0025] In this embodiment, a guide block 209 is provided on the outer side wall of the sealing plate 208, and the locking bolt 206 is screwed to the guide block 209. The provision of the guide block 209 makes the process of horizontally tightening or loosening the locking bolt 206 more stable, and at the same time enables the locking bolt 206 to better support the upper part of the screw head 300, so that the clamping of the screw head 300 is more stable.

[0026] In this embodiment, an exposed portion of the locking bolt 206 located on the outer side of the sealing plate 208 is covered with an insulating cover 210 for preventing power loss and preventing the locking bolt 206 from being chrome-plated.

[0027] In the present invention, the hanger 201 does not necessarily have to adopt the above-mentioned structure, and can also directly adopt the following structure: Figure 1 The shaft-type clamping hanger in the traditional electroplating conductive hanger shown can also adopt other existing clamping structures that can clamp shaft parts and are conductive.

Claims

1. A universal electric puller for use in the electroplating process of a screw head, comprising a hanger unit, characterized in that The hanger unit comprises two hangers that are symmetrically distributed in mirror image, and the opposite ends of the two hangers are screw head insertion ends. A screw head is clamped on each of the two hangers so that the two screw heads are arranged in mirror image symmetry, and the pointed parts of the two screw heads are facing and close to each other. The hanger unit further comprises a vertical support rod, and the two hangers are connected to the same side of the vertical support rod and are distributed in mirror symmetry up and down; The two hangers have the same structure, and the hangers are composed of an integrally connected horizontal support rod, a V-shaped clamping block and a locking bolt, one end of the horizontal support rod is connected to the vertical support rod, and the other end of the horizontal support rod is connected to an outer side wall of one side of the V-shaped clamping block, the V-shaped clamping block is provided with a V-shaped groove, and the V-shaped clamping block is integrally provided with a sealing plate for closing the notch of the V-shaped groove, the locking bolt is horizontally screwed on the sealing plate, the end of the locking bolt extends into the V-shaped groove and faces the tip bottom of the V-shaped groove, and the upper part of the screw head extends into the V-shaped groove from the screw head insertion end, and then the locking bolt is tightened so that the end of the locking bolt pushes the upper part of the screw head and thus the radial surface of the upper part of the screw head is in contact with the average line of the two groove walls of the V-shaped groove.

2. The universal electric puller for use in the electroplating process of a screw head according to claim 1, characterized in that A guide block is arranged on the outer side wall of the sealing plate, and the locking bolt is threadedly connected to the guide block.

3. A universal electric puller for use in the electroplating process of a screw head according to claim 1 or 2, characterized in that An insulating cover is provided on the exposed part of the locking bolt located on the outer side of the sealing plate to prevent power loss and prevent the locking bolt from being chrome-plated.

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