Disc forming hot-pressing die

Abstract

The utility model provides a disc forming hot-pressing die, which relates to the technical field of hot-pressing dies and comprises a lower die plate, a male die head, an upper die plate, a positioning plate, a middle die frame and a guide part. Through the design of the flange, the material accumulation phenomenon between the male die and the female die can be effectively reduced, gas generated in the pressing process can be smoothly exhausted, the blocking probability is greatly reduced, the probability of layering and bulging phenomena after follow-up brake pad hot pressing is greatly reduced, the product percent of pass is increased, and the production cost is reduced. And meanwhile, strain between dies in the hot pressing process can be remarkably reduced, and the service life of the dies is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot-pressing mould technical field, specifically, relate to a disc piece forming hot-pressing mould. BACKGROUND

[0002] Automobile brake pad is also called automobile brake pad, which is a friction material fixed on the brake drum or brake disc rotating with the wheel. The friction lining and friction block bear external pressure and generate friction to achieve the purpose of vehicle speed reduction.

[0003] At present, brake pads need to be heat treated during processing. The main purpose of heat treatment is to improve the performance of brake pads and prolong their service life. Therefore, a hot-pressing mould is needed. However, the existing hot-pressing mould has a serious problem of material accumulation between the male die and the female die. This hinders the gas emission during the hot-pressing process of the mould. As a result, the processed brake pads are prone to delamination and bulging. This increases the rejection rate of the hot-pressed brake pads and the use effect of the hot-pressing mould needs to be improved. SUMMARY

[0004] The utility model discloses a disc piece forming hot-pressing mould.

[0005] The utility model discloses the technical scheme adopted to solve its technical problems is:

[0006] A disc piece forming hot-pressing mould, comprising a lower die plate, a male die head, an upper die plate, a positioning plate, a middle die frame, and a guide piece,

[0007] A plurality of male die heads are equidistantly and symmetrically arranged on the lower die plate, and each male die head has a flange formed at the end away from the lower die plate.

[0008] A plurality of back plate clearance holes corresponding to the male die heads are formed in the upper die plate;

[0009] A plurality of back plate cooperation holes corresponding to the male die heads are formed in the positioning plate, and the positioning plate is connected to the middle die frame;

[0010] A plurality of placement cavities corresponding to the male die heads are formed in the middle die frame, and the placement cavities are adapted to and cooperate with the flanges;

[0011] The guide pieces are symmetrically arranged in the middle die frame, and one end of each guide piece extends to the outside through the positioning plate and the upper die plate in sequence. The upper die plate is in sliding cooperation with the guide pieces.

[0012] Further, the guide pieces are guide pins, a plurality of guide holes are formed in the middle die frame and penetrate the positioning plate, and the guide pins are arranged in the guide holes. One end of each guide pin penetrates the positioning plate and is in sliding cooperation with the upper die plate.

[0013] Further, the punch head and the middle die frame are made of Cr die steel.

[0014] In the above scheme, the hardness and toughness of the Cr die steel are high, and the cost is controlled.

[0015] Further, the middle die frame and the positioning plate are the same size.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] Compared with the prior art, the device can effectively reduce the accumulation phenomenon between the punch and the die through the design of the flange, and the gas generated during the pressing process can be smoothly discharged, the probability of obstruction is greatly reduced, the probability of delamination and bulging after the brake pad hot pressing is completed is greatly reduced, the product qualified rate is increased, and the strain between the molds during the hot pressing process can be significantly reduced, and the service life of the mold is effectively prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a punch head schematic view;

[0020] Figure 3 It is a middle die frame schematic view;

[0021] Figure 4 It is a positioning plate schematic view;

[0022] Figure 5 It is an upper die plate schematic view;

[0023] Reference signs:

[0024] 1, lower die plate; 2, punch head; 3, upper die plate; 31, back plate clearance hole; 4, positioning plate; 41, back plate cooperation hole; 5, middle die frame; 6, placement cavity; 7, guide hole. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. The utility model is further illustrated by combining the drawings and the embodiments:

[0026] For example, Figures 1 to 5As shown in the figure, a disc forming hot press die comprises a lower die plate 1, a male die head 2, an upper die plate 3, a positioning plate 4, a middle die frame 5 and a guide piece,

[0027] A plurality of male die heads 2 are equidistantly and symmetrically arranged on the lower die plate 1, and a flange is formed at an end of each male die head 2 away from the lower die plate 1;

[0028] A plurality of groups of back plate accommodation holes 31 corresponding to the male die heads 2 are formed on the upper die plate 3 so that all the convex points on the brake pad back plate can pass through smoothly;

[0029] A plurality of back plate cooperation holes 41 corresponding to the male die heads 2 are formed on the positioning plate 4 so as to accurately position the brake pad back plate, and the positioning plate 4 is connected with the middle die frame 5 (the middle die frame 5 is consistent in size with the positioning plate 4);

[0030] A plurality of placement cavities 6 corresponding to the male die heads 2 are formed on the middle die frame 5, and the placement cavities 6 are matched with the flanges;

[0031] The guide pieces are symmetrically arranged in the middle die frame 5 and extend to the outside through the positioning plate 4 and the upper die plate 3 in sequence at one end, and the upper die plate 3 is in sliding cooperation with the guide pieces.

[0032] It should be noted that the middle die frame 5 is connected with the telescopic piece arranged on the hot press equipment, and the hot press equipment and the telescopic piece are not shown in the figure.

[0033] Further refinement of the embodiment scheme of the utility model, as Figure 1 As shown in the figure, the guide piece is a guide pin (not shown in the figure), a plurality of guide holes 7 penetrating through the positioning plate 4 are symmetrically arranged on the middle die frame 5, the guide pin is arranged in the guide hole 7, and one end of the guide pin penetrates through the positioning plate 4 and is in sliding cooperation with the upper die plate 3.

[0034] Further optimization of the embodiment scheme of the utility model, the male die head 2 and the middle die frame 5 are both prepared by Cr die steel; the hardness and toughness of the Cr die steel are both high.

[0035] It should be noted that the telescopic piece and the hot press equipment are both electrically connected with the controller, the controller is not shown in the figure and is specifically arranged on one side of the hot press equipment.

[0036] The working process of the utility model is as follows:

[0037] Firstly, the middle mold frame 5 is driven to move down by the telescopic part installed on the hot pressing equipment, and then the positioning plate 4 is also driven to move down, at this time, a gap appears between the upper mold plate 3 and the positioning plate 4, then the powder is laid in the placing cavities 6 in sequence and evenly, after the powder is laid, one brake pad is placed in each placing cavity 6 in sequence, the placing position of the brake pad can be accurately limited through the back plate cooperation hole 41 on the positioning plate 4 during the placing process, after the placing is completed, the middle mold frame 5 and the positioning plate 4 are driven to move up together, then the upper mold plate 3 and the positioning plate 4 are reattached, at this time, the plurality of protrusions on the brake pad can smoothly pass through the back plate displacement hole 31, thereby avoiding damaging the protrusions on the brake pad in the subsequent hot pressing process, and the brake pad is protected, at the same time, the back plate displacement hole 31 can be always aligned with the protrusions on the brake pad through the guide part, and the position of the back plate displacement hole 31 will not be deviated during the lifting of the middle mold frame 5 and the positioning plate 4;

[0038] Then, the lower mold plate 1 is driven to move up by the hot pressing equipment, it should be noted that the convex mold head 2 is always in the placing cavity 6 and in contact with the placing cavity 6 to block the powder in the placing cavity 6, regardless of whether the lower mold plate 1 is in the lifting state or the static state, at the same time, the remaining position of the convex mold head 2 except the flange is kept a certain gap with the inner wall of the placing cavity 6, so that the accumulation phenomenon between the convex mold and the concave mold can be effectively reduced, the gas generated in the hot pressing process can be smoothly discharged, the probability of obstruction is greatly reduced, the probability of delamination and bulging of the brake pad after the subsequent hot pressing is greatly reduced, the product qualified rate is increased, at the same time, the strain between the molds during the hot pressing process can be significantly reduced, the service life of the molds is effectively prolonged; after completing a round of hot pressing, the brake pad is discharged, and then a new round of hot pressing forming process can be started.

[0039] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only to illustrate the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hot pressing mold for forming discs, characterized in that, Includes a lower template (1), a punch head (2), an upper template (3), a positioning plate (4), a middle mold frame (5), and guide components. Several punches (2) are equidistantly and symmetrically arranged on the lower template (1), and each punch (2) has a flange at the end away from the lower template (1); The upper template (3) has several sets of back plate clearance holes (31) that correspond one-to-one with the punch head (2); The positioning plate (4) has several back plate mating holes (41) that correspond one-to-one with the punch head (2), and the positioning plate (4) is connected to the middle mold frame (5); The middle mold frame (5) has several placement cavities (6) that correspond one-to-one with the punch head (2), and the placement cavities (6) are adapted to and cooperate with the flange; The middle mold frame (5) is symmetrically provided with guide members, and one end of the guide member passes through the positioning plate (4) and the upper template (3) in sequence and extends to the outside. The upper template (3) slides with the guide member.

2. The hot pressing mold for disc forming according to claim 1, characterized in that, The guide component is a guide pin. Several guide holes (7) that penetrate the positioning plate (4) are symmetrically arranged on the middle mold frame (5). A guide pin is provided in the guide hole (7). One end of the guide pin passes through the positioning plate (4) and slides with the upper template (3).

3. The hot pressing mold for disc forming according to claim 1, characterized in that, Both the punch head (2) and the middle mold frame (5) are made of Cr mold steel.

4. The hot pressing mold for disc forming according to claim 1, characterized in that, The dimensions of the middle mold frame (5) and the positioning plate (4) are the same.

Images