A flatness control fixture

Abstract

The utility model discloses a flatness control jig, and relates to the technical field related to flatness control jigs. A flatness control jig comprises a chassis, wherein a timing device and an alarm device are arranged inside the chassis, and a positioning cover is arranged on the upper end face of the chassis, an internal stress control block is fixed on the upper surface of the positioning cover, and clamping mechanisms are arranged on opposite sides of the internal stress control block. The clamping mechanism comprises a clamping base, which is fixed on the positioning cover, and a vertical quick clamp is arranged on the upper end face of the clamping base. The utility model mainly utilizes stress control blocks and clamping mechanisms to prevent plastic parts from being deformed due to the influence of internal stress during the cooling process, thereby effectively reducing the production of defective products and effectively improving the product qualification rate.

Description

Technical Field

[0001] The utility model relates to the technical field related to flatness control jigs, in particular to a flatness control jig. Background Art

[0002] During the injection molding process, plastic products inevitably produce uneven crystallization, orientation and shrinkage due to uneven mixing and plasticization, filling rate and cooling, which leads to internal stress in production, and the mechanical properties of plastic products deteriorate during storage and use, and defects such as silver streaks or cracks appear on the surface. In particular, after the injection molding of the plastic shell of some electronic products, different internal stresses will be generated in different parts of the surface of the plastic shell during the cooling process, which will cause the product to deform, making the product not meet the use requirements and become a defective product, which will affect the product qualification rate. Therefore, it is necessary to design a fixture to control the deformation caused by the internal stress of the injection molded part after the injection molding. Utility Model Content

[0003] The purpose of the utility model is to provide a flatness control fixture, aiming to solve the above-mentioned technical problems. The utility model mainly utilizes a stress control block and a clamping mechanism to prevent plastic parts from being deformed due to the influence of internal stress during the cooling process, thereby effectively reducing the production of defective products and effectively improving the product qualification rate.

[0004] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0005] A flatness control jig comprises a chassis, wherein a timing device and an alarm device are arranged inside the chassis, a positioning cover plate is arranged on the upper end surface of the chassis, an internal stress control block is fixed on the upper surface of the positioning cover plate, and clamping mechanisms are arranged on opposite sides of the internal stress control block.

[0006] Preferably, the clamping mechanism comprises a clamping base, the clamping base is fixed on the positioning cover plate, and the upper end surface of the clamping base is provided with a vertical quick clamp.

[0007] Preferably, the vertical quick clamp includes a clamp base plate, a transverse connecting rod, a clamping limit block and a clamping handle. The bottom end of the clamp base plate is fixed to the upper end surface of the clamping base, one end of the transverse connecting rod is rotatably connected to the upper end of the clamp base plate, and the other end of the transverse connecting rod is fixed with a vertical clamping block. One end of the clamping handle is rotatably connected to the front part of the clamp base.

[0008] Preferably, a limiting groove is provided at one end of the transverse connecting rod close to the clamp bottom plate, and a limiting protrusion is provided on the clamping limiting block.

[0009] Preferably, a protective soft glue is provided on the bottom surface of the vertical pressing block.

[0010] Preferably, the clamping mechanism comprises a lifting cylinder and a clamping rod, the bottom end of the lifting cylinder is fixed on the positioning cover plate, the output end of the lifting cylinder is connected to one end of the clamping rod, and the other end of the clamping rod extends to the top of the internal stress control block.

[0011] Preferably, the bottom surface of the pressing rod is provided with protective soft rubber.

[0012] Preferably, the positioning cover plate is provided with a plurality of positioning holes.

[0013] Preferably, the upper surface of the internal stress control block is arranged in an arc-shaped protrusion, and the shape of the arc-shaped protrusion is adapted to the concave shape of the bottom surface of the product; a product positioning groove is provided in the middle part of the internal stress control block, and the product positioning groove is adapted to the positioning protrusion of the product; a product limiting groove is provided in the lower part of the internal stress control block, and the product limiting groove is adapted to the shape of the product.

[0014] Preferably, a support column is further provided on the bottom surface of the internal stress control block, and the bottom surface of the support column is fixed on the positioning cover plate.

[0015] The flatness control jig of the utility model has the following beneficial effects:

[0016] 1. The flatness control jig of the utility model, after the injection molding of the plastic shell is completed, the plastic shell is placed on the internal stress control block according to the positioning groove, and then the plastic shell on the internal stress control block is manually pressed by a pressing mechanism to prevent deformation caused by internal stress at different parts of the product surface when the plastic part is cooled;

[0017] 2. The flatness control jig of the utility model is provided with a clamping mechanism. When in use, the product is placed on the internal stress control block, and then the clamping mechanism is used to clamp the product, making the utility model convenient and practical;

[0018] 3. In the flatness control jig of the utility model, the bottom surface of the vertical pressing block is provided with protective soft rubber, which can prevent the surface of the product from being crushed and play a role in protecting the product;

[0019] 4. In the flatness control jig of the utility model, the stress control block is provided with a product positioning groove, which is convenient for positioning and placing the product; the product limit groove is provided to prevent the deformation of the product, thereby effectively reducing the generation of defective products and effectively improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall schematic diagram of the first embodiment of the flatness control jig of the utility model;

[0021] Figure 2 It is a schematic diagram of the clamping mechanism in the first implementation of the flatness control jig of the utility model;

[0022] Figure 3 A schematic diagram of a vertical quick clamp in the first implementation of the flatness control fixture of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal stress control block of the flatness control fixture of the utility model;

[0024] Figure 5 It is an overall schematic diagram of the second embodiment of the flatness control fixture of the utility model. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments and drawings.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Embodiment 1:

[0029] like Figures 1 to 4As shown, a flatness control fixture includes a chassis 1, a timing device 2 and an alarm device 3 are provided inside the chassis 1, a positioning cover plate 4 is provided on the upper end surface of the chassis 1, an internal stress control block 5 is fixed on the upper surface of the positioning cover plate 4, and a clamping mechanism 6 is provided on opposite sides of the internal stress control block 5. The clamping mechanism 6 includes a clamping base 601, the clamping base 601 is fixed on the positioning cover plate 4, and a vertical quick clamp is provided on the upper end surface of the clamping base 601. The vertical quick clamp includes a clamp bottom plate 602, a transverse connecting rod 603, a clamping limit block 604 and a clamping handle 605. The bottom end of the clamp bottom plate 602 is fixed to the upper end surface of the clamping base 601, one end of the transverse connecting rod 603 is rotatably connected to the upper end of the clamp bottom plate 602, and the other end of the transverse connecting rod 603 is fixed with a vertical clamp 606. One end of the clamping handle 605 is rotatably connected to the front part of the clamp bottom plate 602. The transverse connecting rod 603 is provided with a limit groove at one end close to the clamp bottom plate 602, and the clamping limit block 604 is provided with a limit protrusion. The bottom surface of the vertical clamp 606 is provided with a protective soft rubber. The bottom surface of the vertical clamp 606 is provided with a protective soft rubber. The positioning cover plate 4 is provided with a plurality of positioning holes. The upper surface of the internal stress control block 5 is provided with an arc-shaped protrusion, and its arc-shaped protrusion shape is adapted to the concave shape of the bottom surface of the product. The middle of the internal stress control block 5 is provided with a product positioning groove 501, which is matched with the positioning protrusion of the product; the lower part of the internal stress control block 5 is provided with a product limiting groove 502, which is matched with the shape of the product. The bottom surface of the internal stress control block 5 is also provided with a support column 7, and the bottom surface of the support column 7 is fixed on the positioning cover plate 4.

[0030] It should be noted that: in this embodiment, the timing device 2 adopts a timer to set the time of compression cooling; the alarm device 3 adopts a buzzer alarm to sound a buzzer alarm when the cooling time is up; the bottom surface of the support column 7 is provided with an adjusting screw, and the adjusting screw is used to adjust the height of the internal stress control block 5, and the bottom surface of the clamping base 601 is also provided with an adjusting screw, and the setting of the adjusting screw is used to adjust the height of the clamping mechanism 6. When in use, first lift the transverse connecting rod 603 of the clamping mechanism 6, so that one end of the transverse connecting rod 603 rotates and lifts around the upper end of the clamp base plate 602, and then the vertical pressing block 606 can be lifted, and then the product is placed on the internal stress control block 5, so that the positioning protrusion of the product is located in the product positioning groove 501, and then the transverse connecting rod 603 of the clamping mechanism 6 is lowered, so that the vertical pressing block 606 is just pressed on the upper end surface of the product, and then the clamping handle 605 is used to drive the clamping limit block 604 to move upward, and the limiting protrusion of the clamping limit block 604 is clamped in the limiting groove of the transverse connecting rod 603, and the upper part of the clamping base plate is inclined toward one side of the middle part of the positioning cover plate 4, and its inclined surface is located under the limiting groove of the transverse connecting rod 603. When the limiting protrusion of the clamping limit block 604 is pressed downward along the inclined surface, the vertical clamping block 606 at the end of the transverse connecting rod 603 can be further pressed, so that the vertical clamping block 606 is pressed tightly against the surface of the product. After the vertical clamping block 606 is pressed against the surface of the product, the cooling time is set by the timer. When the set cooling time is reached, the buzzer will automatically sound an alarm. The staff can press down the clamping handle 605, thereby driving the clamping limit block 604 to release the clamping restriction on the transverse connecting rod 603, so that the transverse connecting rod 603 can be lifted, and the cooled product can be taken out. This can effectively avoid the deformation caused by the internal stress of different parts of the surface of the product after injection molding, effectively reduce the number of defective products, and improve the product qualification rate.

[0031] Embodiment 2:

[0032] like Figure 4 and Figure 5As shown, a flatness control jig includes a chassis 1, wherein a timing device 2 and an alarm device 3 are provided inside the chassis 1, a positioning cover plate 4 is provided on the upper end surface of the chassis 1, an internal stress control block 5 is fixed on the upper surface of the positioning cover plate 4, and a clamping mechanism 6 is provided on opposite sides of the internal stress control block 5. The clamping mechanism 6 includes a lifting cylinder 607 and a clamping rod 608, wherein the bottom end of the lifting cylinder 607 is fixed on the positioning cover plate 4, and the output end thereof is connected to one end of the clamping rod 608, and the other end of the clamping rod 608 extends to the upper surface of the internal stress control block 5. The bottom surface of the clamping rod 608 is provided with a protective soft rubber. The positioning cover plate 4 is provided with a plurality of positioning holes. The upper surface of the internal stress control block 5 is provided with an arc-shaped convex arrangement, and the shape of the arc-shaped convex arrangement is adapted to the concave shape of the bottom surface of the product. The middle of the internal stress control block 5 is provided with a product positioning groove 501, which is matched with the positioning protrusion of the product; the lower part of the internal stress control block 5 is provided with a product limiting groove 502, which is matched with the shape of the product. The bottom surface of the internal stress control block 5 is also provided with a support column 7, and the bottom surface of the support column 7 is fixed on the positioning cover plate 4.

[0033] It should be noted that: in this embodiment, when in use, the lifting cylinder 607 drives the clamping rod 608 to lift up, and then the product is placed on the internal stress control block 5, and then the cooling time is set by the timer. After the switch is turned on, the lifting cylinder 607 will drive the clamping rod 608 to press down on the surface of the product. When the set cooling time is reached, the buzzer will automatically sound an alarm. At the same time, the lifting cylinder 607 will automatically drive the clamping rod 608 to lift up, and the staff can then remove the product. This can effectively avoid deformation caused by internal stress in different parts of the surface of the product after injection molding, effectively reduce defective products, and improve product qualification rate.

[0034] The above description is only a preferred embodiment of the utility model and does not constitute any form of limitation to the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the utility model, which are all equivalent embodiments of the utility model. At the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model still belong to the technical solution of the utility model.

Claims

1. A flatness control jig, characterized in that: It comprises a chassis, wherein a timing device and an alarm device are arranged inside the chassis, a positioning cover is arranged on the upper end surface of the chassis, an internal stress control block is fixed on the upper surface of the positioning cover, and clamping mechanisms are arranged on opposite sides of the internal stress control block.

2. The flatness control jig according to claim 1, characterized in that: The clamping mechanism comprises a clamping base, which is fixed on a positioning cover plate, and a vertical quick clamp is arranged on the upper end surface of the clamping base.

3. The flatness control jig according to claim 2, characterized in that: The vertical quick clamp includes a clamp base plate, a transverse connecting rod, a clamping limit block and a clamping handle. The bottom end of the clamp base plate is fixed to the upper end surface of the clamping base, one end of the transverse connecting rod is rotatably connected to the upper end of the clamp base plate, and the other end of the transverse connecting rod is fixed with a vertical clamping block. One end of the clamping handle is rotatably connected to the front part of the clamp base.

4. The flatness control jig according to claim 3, characterized in that: A limiting groove is provided at one end of the transverse connecting rod close to the clamp bottom plate, and a limiting protrusion is provided on the clamping limiting block.

5. The flatness control jig according to claim 3, characterized in that: The bottom surface of the vertical pressing block is provided with protective soft glue.

6. The flatness control jig according to claim 1, characterized in that: The clamping mechanism includes a lifting cylinder and a clamping rod. The bottom end of the lifting cylinder is fixed on the positioning cover plate, and the output end is connected to one end of the clamping rod. The other end of the clamping rod extends to the top of the internal stress control block.

7. The flatness control jig according to claim 6, characterized in that: The bottom surface of the pressing rod is provided with protective soft rubber.

8. The flatness control jig according to claim 1, characterized in that: The positioning cover plate is provided with a plurality of positioning holes.

9. The flatness control jig according to claim 8, characterized in that: The upper surface of the internal stress control block is arranged in an arc-shaped protrusion, and its arc-shaped protrusion shape is adapted to the concave shape of the bottom surface of the product; a product positioning groove is arranged in the middle part of the internal stress control block, and the product positioning groove is adapted to the positioning protrusion of the product; a product limiting groove is arranged in the lower part of the internal stress control block, and the product limiting groove is adapted to the shape of the product.

10. The flatness control jig according to claim 9, characterized in that: The bottom surface of the internal stress control block is also provided with a support column, and the bottom surface of the support column is fixed on the positioning cover plate.

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