A plastic mold adapting to insert height error

Abstract

The present invention discloses a plastic mold that can adapt to the height error of inserts, comprising: a hardware insert, a front mold assembly and a rear mold assembly corresponding to the front mold assembly, the rear mold assembly comprising a limit adjustment structure, a pressure needle, a pressure needle spring block, a pressure needle base plate, a pressure needle panel, a telescopic drive device, a base, a mold foot plate and a rear template, the front mold assembly comprising a front template and an insert, the pressure needle spring block is arranged in the pressure needle base plate, a first spring is arranged at the bottom of the pressure needle spring block, the pressure needle is arranged at the top of the pressure needle spring block and passes through the pressure needle panel and points to the bottom surface of the hardware insert, and the limit adjustment structure is arranged on the pressure needle panel to limit the stroke of the pressure needle base plate. Through the above manner, the plastic mold that can adapt to the height error of inserts described in the present invention can adapt to the height error problem of hardware inserts, reduce the processing cost of hardware inserts and the problem of product flashing, and avoid the problem of pressure needles, hardware inserts and inserts being damaged due to excessive force.

Description

Technical Field

[0001] The invention relates to the technical field of plastic moulds, and in particular to a plastic mould adaptable to height errors of inserts. Background Art

[0002] In the field of injection mold technology, metal insert molding is used more and more widely. Through the combination of the resin's easy formability, flexibility, lightness, insulation and the metal's rigidity, strength, heat resistance and conductivity, complex and sophisticated metal-plastic integrated products that can meet the special functional requirements of the product can be made.

[0003] In the actual production process, the main difficulty of insert molding lies in the coordination with the mold. The overflow value of plastic resin is generally small, and the overflow value of PA66 is about 0.015mm. When the sealing surface clearance is greater than the material overflow value, the product will produce flash.

[0004] Metal inserts can be processed and manufactured by cutting, grinding, stamping, cold heading and casting. Different processing techniques lead to different processing precision. The higher the precision requirement of metal inserts, the more expensive the processing cost is. Insufficient precision of metal inserts will lead to problems with the mold, and the final product cannot meet the quality requirements. The metal positioning surface of some cylindrical metal inserts is also the sealing surface, and the dimensional tolerance is required to be ±0.01mm. The plastic material is PA66, and the material overflow value is 0.015mm, while the axial dimensional tolerance of metal inserts is usually ±0.05mm. The size of metal inserts fluctuates greatly, and the mold cannot match. If the mold is made according to the upper limit of the metal insert size, the size of the metal positioning surface of the product will be out of tolerance, and the sealing surface will produce a large flash, which is not allowed by the product function; if the mold is made according to the lower limit of the metal insert size, the metal insert will face the problem of being unable to be embedded in the mold, the mold cannot be closed, and the mold structure is easily crushed. In traditional solutions, the quality requirements of the product can only be met by controlling the axial dimensional accuracy of the metal insert within ±0.005mm, which greatly increases the processing cost of the metal insert. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a plastic mold that can adapt to the height error of the insert, improve the adaptability to the height error of the insert, and reduce the flash problem and the insert processing cost.

[0006] To solve the above technical problems, a technical solution adopted by the present invention is: to provide a plastic mold that adapts to the height error of the insert, including: a hardware insert, a front mold assembly and a rear mold assembly corresponding to the front mold assembly, the rear mold assembly includes a limit adjustment structure, a pressure needle, a pressure needle spring block, a pressure needle bottom plate, a pressure needle panel, a telescopic driving device, a base, a mold foot plate and a rear template, the mold foot plate is arranged on the base at intervals, the rear template is arranged on the mold foot plate, the hardware insert is arranged in the rear template, the front mold assembly includes a front template and an insert, the insert is arranged on the front template and points to the hardware insert, the pressure needle bottom plate is located between the base and the rear template and changes the spacing between the pressure needle bottom plate and the rear template through the telescopic driving device, the pressure needle panel is arranged on the top surface of the pressure needle bottom plate, the pressure needle spring block is arranged in the pressure needle bottom plate, a first spring is arranged at the bottom of the pressure needle spring block, the pressure needle is arranged on the top of the pressure needle spring block and passes through the pressure needle panel and points to the bottom surface of the hardware insert, and the limit adjustment structure is arranged on the pressure needle panel to limit the stroke of the pressure needle bottom plate.

[0007] In a preferred embodiment of the present invention, a mold core is provided on the rear mold plate, and the hardware insert is provided in the mold core.

[0008] In a preferred embodiment of the present invention, the mold core is provided with a socket corresponding to the hardware insert.

[0009] In a preferred embodiment of the present invention, the telescopic driving device is a pneumatic cylinder or an oil cylinder.

[0010] In a preferred embodiment of the present invention, the telescopic driving device is arranged on the base, and the end portion is connected to the pressing needle bottom plate.

[0011] In a preferred embodiment of the present invention, a guide groove corresponding to the pressing needle spring block is provided in the pressing needle bottom plate.

[0012] In a preferred embodiment of the present invention, the limit adjustment structure includes a limit column, a screw mounting block, a limit column adjustment slider and a screw, the screw mounting block is arranged on one side or both sides of the needle pressing panel, the screw is arranged on the screw mounting block and points to the needle pressing panel, the limit column adjustment slider is arranged at the end of the screw and extends into the needle pressing panel, the limit column vertically penetrates the needle pressing panel and points to the rear template, an oblique groove is arranged at the lower part of one side of the limit column, and a bending portion penetrating the oblique groove is arranged on the limit column adjustment slider.

[0013] In a preferred embodiment of the present invention, the press needle panel is provided with a guide hole corresponding to the limiting column.

[0014] In a preferred embodiment of the present invention, a second spring is sleeved on the screw.

[0015] In a preferred embodiment of the present invention, a slide groove corresponding to the limit column adjustment slider is provided in the pressure needle panel, a T-slot is provided at the outer end of the limit column adjustment slider, and a stepped shaft located in the T-slot is provided at the end of the screw.

[0016] The beneficial effects of the present invention are as follows: the present invention points out a plastic mold that can adapt to the height error of the insert. After the mold is closed, the pressure needle base plate is lifted by the telescopic driving device, and then the pressure needle spring block and the pressure needle are elastically pressed by the first spring. The pressure needle is used to realize elastic pressure on the bottom of the hardware insert, and the hardware insert is positioned in cooperation with the insert to adapt to the height error problem of the hardware insert, reduce the processing cost of the hardware insert and the burr problem of the product, and fine-tune the lifting stroke of the pressure needle base plate through the limit adjustment structure, and change the elastic pressure value applied by the first spring to the pressure needle and the hardware insert, which can not only ensure that the requirements for the sealing of the hardware insert are met, but also avoid the problem of damage to the pressure needle, hardware insert and insert due to excessive force, thereby improving production stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of a plastic mold that adapts to insert height error of the present invention;

[0019] Figure 2 yes Figure 1 A cross-sectional view of

[0020] Figure 3 yes Figure 1 Structural schematic diagram of the middle limit adjustment structure. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1~Figure 3 , the embodiment of the present invention includes:

[0023] like Figure 1 and Figure 2The plastic mold that adapts to the height error of the insert shown includes: a hardware insert 2, a front mold assembly and a rear mold assembly corresponding to the front mold assembly, the rear mold assembly includes a limit adjustment structure, a press needle 3, a press needle spring block 5, a press needle bottom plate 14, a press needle panel 13, a telescopic drive device 10, a base 15, a mold foot plate 12 and a rear mold plate 11, the mold foot plate 12 is arranged on the base 15 at intervals, the rear mold plate 11 is arranged on the mold foot plate 12, and the rear mold plate 11 is supported and fixed by the two mold foot plates 12.

[0024] The hardware insert 2 is arranged in the rear template 11. In this embodiment, the hardware insert 2 is a cylindrical metal insert. A mold core 22 is arranged on the rear template 11. The hardware insert 2 is arranged in the mold core 22. The mold core 22 is provided with a socket corresponding to the hardware insert 2, which is convenient for manual or mechanical hands to install the hardware insert 2. The front mold assembly includes a front template 16 and an insert 1. The insert 1 is arranged on the front template 16 and points to the hardware insert 2. After the mold is closed, the top of the hardware insert 2 is pressed and fixed by the insert 1.

[0025] The pressure needle bottom plate 14 is located between the base 15 and the rear template 11, and the distance between the pressure needle bottom plate 14 and the rear template 11 is changed by the telescopic driving device 10. In this embodiment, the telescopic driving device 10 is a cylinder or an oil cylinder, and the telescopic control is flexible. Figure 1 and Figure 2 As shown, the telescopic driving device 10 is fixed on the base 15, and the end portion is connected to the pressing needle bottom plate 14, and the pressing needle bottom plate 14 is directly pushed and pulled.

[0026] The press needle panel 13 is arranged on the top surface of the press needle base plate 14 and can be fixed by bolts. The press needle spring block 5 is arranged in the press needle base plate 14, and a guide groove corresponding to the press needle spring block 5 is arranged in the press needle base plate 14, which is conducive to the lifting and lowering of the press needle spring block 5. A first spring 4 is arranged at the bottom of the press needle spring block 5 to elastically support the press needle spring block 5. The press needle 3 is arranged on the top of the press needle spring block 5 and passes through the press needle panel 13 and points to the bottom surface of the hardware insert 2. The first spring 4 applies elastic pressure to the press needle spring block 5, the press needle 3 and the hardware insert 2, and cooperates with the insert 1 to position the hardware insert 2 to adapt to the height error problem of the hardware insert 2, reduce the processing cost of the hardware insert and the flashing problem of the product.

[0027] In order to prevent the first spring 4 from exerting too much pressure on the pressing needle 3 when the pressing needle bottom plate 14 moves forward, a limit adjustment structure is required for adjustment. The limit adjustment structure is arranged on the pressing needle panel 13 to limit the travel of the pressing needle bottom plate 14. In this embodiment, Figure 3As shown, the limit adjustment structure includes a limit column 6, a screw mounting block 7, a limit column adjustment slider 9 and a screw 8. The screw mounting block 7 is arranged on one side or both sides of the needle pressing panel 13 and fixed by bolts. The screw 8 is arranged on the screw mounting block 7 and points to the needle pressing panel 13. The limit column adjustment slider 9 is arranged at the end of the screw 8 and extends into the needle pressing panel 13.

[0028] A sliding groove corresponding to the limit column adjustment slider 9 is provided in the needle pressing panel 13, which is conducive to the sliding of the limit column adjustment slider 9. A T-slot 18 is provided at the outer end of the limit column adjustment slider 9, and a stepped shaft located in the T-slot 18 is provided at the end of the screw 8. A threaded hole corresponding to the screw 8 is provided on the screw mounting block 7. The axial movement is carried out by rotating the screw 8, thereby driving the sliding adjustment of the limit column adjustment slider 9. A second spring 17 is provided on the screw 8 to prevent the screw 8 from loosening.

[0029] In this embodiment, the limit column 6 vertically penetrates the needle pressing panel 13 and points to the rear template 11. The needle pressing panel 13 is provided with a guide hole 21 corresponding to the limit column 6, which has good guiding performance. An inclined groove 19 is provided at the lower part of one side of the limit column 6, and a bending portion 20 penetrating the inclined groove 19 is provided on the limit column adjusting slider 9. By sliding the limit column adjusting slider 9, the height of the limit column 6 protruding above the needle pressing panel 13 is changed, so as to cooperate with the rear template 11 to limit the stroke of the needle pressing panel 13, and change the elastic pressure value applied by the first spring 4 to the needle pressing 3 and the hardware inlay 2, which can not only ensure that the requirements of the hardware inlay 2 are met, but also avoid the problem of damage to the needle pressing 3, the hardware inlay 2 and the inlay 1 due to excessive force, thereby reducing maintenance costs.

[0030] In summary, the plastic mold that adapts to the height error of the insert pointed out by the present invention has good adaptability to the height error of the hardware insert, ensures the quality of the plastic product, reduces the processing accuracy requirements for the hardware insert, thereby reducing the cost, facilitating adjustment, and low operation and maintenance costs.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plastic mold that adapts to insert height error, characterized in that: include: A hardware insert, a front mold assembly and a rear mold assembly corresponding to the front mold assembly, wherein the rear mold assembly includes a limit adjustment structure, a pressure needle, a pressure needle spring block, a pressure needle bottom plate, a pressure needle panel, a telescopic drive device, a base, a mold foot plate and a rear mold plate, wherein the mold foot plate is arranged on the base at intervals, the rear mold plate is arranged on the mold foot plate, the hardware insert is arranged in the rear mold plate, the front mold assembly includes a front mold plate and an insert, the insert is arranged on the front mold plate and points to the hardware insert, and the pressure needle bottom plate is located between the base and the rear mold plate and is driven by the telescopic drive device Change the distance between the press needle base plate and the rear template, the press needle panel is arranged on the top surface of the press needle base plate, the press needle spring block is arranged in the press needle base plate, a first spring is arranged at the bottom of the press needle spring block, the press needle is arranged on the top of the press needle spring block and passes through the press needle panel and points to the bottom surface of the hardware insert, the limit adjustment structure is arranged on the press needle panel to limit the stroke of the press needle base plate, a mold core is arranged on the rear template, the hardware insert is arranged in the mold core, the telescopic drive device is arranged on the base, and the end is connected to the press needle base plate.

2. The plastic mold capable of adapting to insert height error according to claim 1, characterized in that: The mold core is provided with a socket corresponding to the hardware insert.

3. The plastic mold capable of adapting to insert height error according to claim 1, characterized in that: The telescopic driving device is a pneumatic cylinder or an oil cylinder.

4. The plastic mold capable of adapting to insert height error according to claim 1, characterized in that: The pressing needle bottom plate is provided with a guide groove corresponding to the pressing needle spring block.

5. The plastic mold capable of adapting to insert height error according to claim 1, characterized in that: The limit adjustment structure includes a limit column, a screw mounting block, a limit column adjustment slider and a screw, wherein the screw mounting block is arranged on one side or both sides of the needle pressing panel, the screw is arranged on the screw mounting block and points to the needle pressing panel, the limit column adjustment slider is arranged at the end of the screw and extends into the needle pressing panel, the limit column vertically penetrates the needle pressing panel and points to the rear template, an oblique groove is arranged at the lower part of one side of the limit column, and a bending portion penetrating the oblique groove is arranged on the limit column adjustment slider.

6. The plastic mold capable of adapting to insert height error according to claim 5, characterized in that: The pressure needle panel is provided with a guide hole corresponding to the limiting column.

7. The plastic mold capable of adapting to insert height error according to claim 5, characterized in that: A second spring is sleeved on the screw.

8. The plastic mold capable of adapting to insert height error according to claim 5, characterized in that: The pressure needle panel is provided with a sliding groove corresponding to the limit column adjustment slider, the outer end of the limit column adjustment slider is provided with a T-slot, and the end of the screw is provided with a stepped shaft located in the T-slot.

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