Die capable of reducing burrs of joint line

Abstract

The utility model discloses a die capable of reducing burrs of a joint line. The die comprises an upper die, a middle die and a lower die, an upper cavity is arranged in the upper die, a lower cavity is arranged in the middle die, a first arc angle is arranged in the upper cavity, and a second arc angle is arranged in the lower cavity. The first arc angle and the second arc angle are arranged in an up-down staggered mode, and the staggered distance between the first arc angle and the second arc angle is 0.02 mm. A mold cavity is defined by the upper cavity and the lower cavity, a groove is formed in the bottom side of the middle mold, a boss is arranged on the upper side of the lower mold, the boss is upwards inserted into the groove, the groove and the lower cavity are arranged in an up-down corresponding mode, and a cavity through hole is formed in the lower cavity. A forming groove is formed in the boss; and the cavity through hole and the forming groove are correspondingly communicated up and down. The utility model has the advantage of reducing the burrs of the joint line and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a mold capable of reducing burrs on a parting line. Background Art

[0002] Rubber products are typically compression molded. During the molding process, burrs inevitably form along the parting line of the rubber product. Therefore, deburring is often performed as the final step in the manufacturing process. Three common methods exist for deburring: First, direct manual removal by pulling. This manual removal method is costly, inaccurate, and sometimes requires blades, resulting in extremely low efficiency and impacting product quality. Second, pneumatic trimming equipment improves efficiency, but pneumatic equipment is expensive to purchase, and its deburring performance is uneven, making product quality uncertain. Finally, nitrogen freezing is used for removal, which is also costly, environmentally friendly, and requires a more stringent production environment.

[0003] Therefore, there are non-disassembly rubber product molds such as patent application number 202022836156.7 on the market, which include an upper mold and a lower mold for molding opposite surfaces, an upper cavity is provided at the bottom of the upper mold, and a lower cavity is provided on the top of the lower mold that matches the position of the upper cavity. The upper cavity and the lower cavity are combined to form a molding cavity, and an upper consumption groove is provided on the edge of the upper cavity, and a lower consumption groove is provided on the edge of the lower cavity. The openings of the upper consumption groove and the lower consumption groove are arranged relative to each other. An upper discharge slope connected to the upper cavity is provided at one end of the material consumption groove close to the upper cavity, and the upper discharge slope gradually tilts upward from the edge of the upper cavity along the direction of the upper material consumption groove. A lower discharge slope connected to the lower cavity is provided at one end of the lower material consumption groove close to the lower cavity, and the lower discharge slope gradually tilts downward from the edge of the lower cavity along the direction of the lower material consumption groove, so that the position where the upper discharge slope and the lower discharge slope fit together forms a cutting edge for cutting off the flash, and the cutting edge is located at the edge of the upper cavity and the lower cavity. This non-disassembly rubber product mold does not require manual burr removal and can reduce the problem of defective parting lines. However, this non-disassembly rubber product mold is not suitable for all products. For example, for multi-layer and multi-cavity molds, when there are arc corners that need to make parting lines, due to the processing accuracy and life of the mold, the minimum width of the burr reserved edge can only be about 0.05mm. According to the existing conventional design, the 0.05mm burr reservation will result in unstable burr breakpoint width during subsequent burr removal, and the burr residue on some parting lines will be too large. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a mold capable of reducing burrs on the parting line.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A mold that can reduce the burrs of the parting line includes an upper mold, a middle mold and a lower mold, an upper cavity is provided in the upper mold, a lower cavity is provided in the middle mold, a first arc angle is provided in the upper mold cavity, a second arc angle is provided in the lower mold cavity, the first arc angle and the second arc angle are staggered up and down, and the staggered distance between the first arc angle and the second arc angle is 0.02mm, the upper mold cavity and the lower mold cavity are combined to form a mold cavity, a groove is provided on the bottom side of the middle mold, a boss is provided on the upper side of the lower mold, the boss is inserted upward into the groove, and the groove and the lower mold cavity are correspondingly arranged up and down, a cavity through hole is provided in the lower mold cavity, a molding groove is provided on the boss, and the cavity through hole and the molding groove are connected in correspondence up and down, the front, left, rear and right parts of the upper side of the lower mold are respectively provided with a first lower mold groove, a second lower mold groove, a third lower mold groove and a fourth lower mold groove, the first lower mold groove, the second lower mold groove, the third lower mold groove and the fourth lower mold groove, The first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod are respectively provided in the lower mold groove and the fourth lower mold groove, and the first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod are respectively provided with the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring, the bottom sides of the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring all contact with the top side of the lower mold, the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring pass upward through the middle mold and contact with the bottom side of the upper mold, the first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod pass upward through the middle mold and the upper mold, and the lower mold is also provided with a guide rod, which passes upward through the middle mold and the upper mold, and the upper mold is provided with a limit rod, which passes downward through the middle mold and contacts the lower mold.

[0007] Preferably, the bottom edge of the upper mold is provided with a plurality of first notch grooves, and the top edge of the lower mold is provided with a plurality of second notch grooves.

[0008] Preferably, the left side of the middle mold passes through the left side between the upper mold and the lower mold and is connected to the first connecting plate, and the right side of the middle mold passes through the right side between the upper mold and the lower mold and is connected to the second connecting plate.

[0009] By adopting the above technical solution, the utility model has the following beneficial effects:

[0010] The utility model provides a first arc angle in the upper mold cavity, and a second arc angle in the lower mold cavity. The first arc angle and the second arc angle are staggered up and down, and the staggered distance between the first arc angle and the second arc angle is 0.02 mm. In specific use, since the first arc angle and the second arc angle of the upper mold cavity and the lower mold cavity are staggered, the width of the burr of the mold line, especially the burr at the mold line at the arc angle, can be reduced. After molding, the burr around the molded product can be blown away to eliminate the burr, thereby reducing the subsequent tearing process and reducing the burr residue.

[0011] In summary, the utility model has the advantages of reducing the burrs on the parting line and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic structural diagram of the utility model when the upper die is removed;

[0014] Figure 3 This is a schematic structural diagram of the utility model when the upper mold and the middle mold are removed;

[0015] Figure 4 It is a structural schematic diagram of the upper mold in another direction of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] Example 1

[0022] In this embodiment, the utility model proposes a mold that can reduce the burrs on the parting line. By staggering the cavities and reducing the width of the burrs, the peripheral burrs of the product can be blown away after molding, reducing the tearing process at the rear end and reducing the residual burrs.

[0023] like Figure 1-4As shown, in one embodiment of the present invention, a mold of the present invention that can reduce the burrs of the parting line includes an upper mold 1, a middle mold 2 and a lower mold 3. The upper mold 1 is provided with an upper cavity 11, the middle mold 2 is provided with a lower cavity 21, the upper cavity 11 is provided with a first arc angle, and the lower cavity 21 is provided with a second arc angle. The first arc angle and the second arc angle are staggered up and down, and the staggered distance between the first arc angle and the second arc angle is 0.02 mm. The upper cavity 11 and the lower cavity 21 are enclosed to form a mold cavity, and a groove is provided on the bottom side of the middle mold 2. , a boss 4 is provided on the upper side of the lower mold 3, the boss 4 is inserted into the groove upward, and the groove is arranged correspondingly to the lower mold cavity 21 in the upper and lower directions, a cavity through hole is provided in the lower mold cavity 21, a molding groove is provided on the boss 4, and the cavity through hole is connected to the molding groove in the upper and lower directions, and the front, left, rear and right parts of the upper side of the lower mold 3 are respectively provided with a first lower mold groove, a second lower mold groove, a third lower mold groove and a fourth lower mold groove, and the first lower mold groove, the second lower mold groove, the third lower mold groove and the fourth lower mold groove are respectively provided with a first mounting rod 31, a second mounting rod 32, a third mounting rod The first mounting rod 31, the second mounting rod 32, the third mounting rod 33 and the fourth mounting rod 34 are respectively provided with a first buffer spring 35, a second buffer spring 36, a third buffer spring 37 and a fourth buffer spring 38. The bottom sides of the first buffer spring 35, the second buffer spring 36, the third buffer spring 37 and the fourth buffer spring 38 are all in contact with the top side of the lower die 3, and the first buffer spring 35, the second buffer spring 36, the third buffer spring 37 and the fourth buffer spring 38 are in contact with the top side of the lower die 3. The upper part passes through the middle mold 2 and contacts the bottom side of the upper mold 1. The first mounting rod 31, the second mounting rod 32, the third mounting rod 33 and the fourth mounting rod 34 pass through the middle mold 2 and the upper mold 1 upward. The lower mold 3 is also provided with a guide rod 39, which passes through the middle mold 2 and the upper mold 1 upward. The upper mold 1 is provided with a limit rod 40, which passes through the middle mold 2 downward and contacts the lower mold 3. The first buffer spring 35, the second buffer spring 36, the third buffer spring 37 and the fourth buffer spring 38 of the utility model will not pass through the upper mold 1 upward.

[0024] Specifically, a plurality of first notched grooves 5 are provided on the bottom edge of the upper mold 1, and a plurality of second notched grooves 6 are provided on the top edge of the lower mold 3. The arrangement of the first notched grooves 5 and the second notched grooves 6 facilitates the relocation of the upper mold 1 and the lower mold 3. In order to facilitate subsequent connection and use, the left side of the middle mold 2 passes through the left side between the upper mold 1 and the lower mold 3 to the left and is connected with a first connecting plate 7. The right side of the middle mold 2 passes through the right side between the upper mold 1 and the lower mold 3 to the right and is connected with a second connecting plate 8. In specific applications, the first connecting plate 7 and the second connecting plate 8 can be connected to the specific use position of the utility model, and then the utility model can be connected and used normally.

[0025] In the present invention, the first arc angle and the second arc angle are staggered up and down, and the staggered distance between the first arc angle and the second arc angle is 0.02mm. When specifically set, the position of the first arc angle can be 0.02mm protruding from the second arc angle or the position of the first arc angle can be 0.02mm recessed from the second arc angle. The present invention can also stagger all edges of the entire upper cavity 11 and the lower cavity 21, rather than being limited to the positions of the first arc angle and the second arc angle.

[0026] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of protection of the technical solution of the utility model.

Claims

1. A mold capable of reducing parting line burrs, characterized in that: The mold comprises an upper mold, a middle mold and a lower mold, an upper mold is provided in the upper mold, a lower mold cavity is provided in the middle mold, a first arc angle is provided in the upper mold cavity, a second arc angle is provided in the lower mold cavity, the first arc angle and the second arc angle are staggered up and down, and the staggered distance between the first arc angle and the second arc angle is 0.02mm, the upper mold cavity and the lower mold cavity are combined to form a mold cavity, a groove is provided on the bottom side of the middle mold, a boss is provided on the upper side of the lower mold, the boss is inserted upward into the groove, and the groove and the lower mold cavity are arranged correspondingly up and down, a cavity through hole is provided in the lower mold cavity, a forming groove is provided on the boss, and the cavity through hole is connected to the forming groove correspondingly up and down, the front, left, rear and right parts of the upper side of the lower mold are respectively provided with the first lower mold groove, the second lower mold groove, the third lower mold groove and the fourth lower mold groove, the first lower mold groove, the second lower mold groove, the third lower mold groove and the fourth The first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod are respectively provided in the lower mold groove, and the first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod are respectively provided with the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring. The bottom sides of the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring all contact with the top side of the lower mold, and the first buffer spring, the second buffer spring, the third buffer spring and the fourth buffer spring pass upward through the middle mold and contact with the bottom side of the upper mold. The first mounting rod, the second mounting rod, the third mounting rod and the fourth mounting rod pass upward through the middle mold and the upper mold. A guide rod is also provided on the lower mold, which passes upward through the middle mold and the upper mold. A limit rod is provided on the upper mold, which passes downward through the middle mold and contacts the lower mold.

2. A mold capable of reducing parting line burrs according to claim 1, characterized in that: The bottom edge of the upper mold is provided with a plurality of first notch grooves, and the top edge of the lower mold is provided with a plurality of second notch grooves.

3. The mold capable of reducing parting line burrs according to claim 1, characterized in that: The left side of the middle mold passes through the left side between the upper mold and the lower mold and is connected to the first connecting plate, and the right side of the middle mold passes through the right side between the upper mold and the lower mold and is connected to the second connecting plate.

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