A one-mold two-cavity compression mold for hinges

Abstract

The utility model relates to the technical field of compression molds, and specifically to a one-mold two-cavity compression mold for hinges, comprising an upper mold and a lower mold, wherein the upper surface of the lower mold is provided with a molding cavity, and the side surface of the lower mold is provided with an auxiliary oil cylinder, and the output end of the auxiliary oil cylinder is rotatably provided with a molding rod, and the molding rod extends into the interior of the molding cavity, and a rotating rod for rotating the molding rod is provided at one end of the molding rod near the auxiliary oil cylinder, so that the demoulding method is more gentle, it is not easy to damage the newly formed hinge, and the quality and yield rate of the finished product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compression molds, in particular to a one-mold two-cavity compression mold for hinges. Background Art

[0002] The hinge compression molding process is to put a certain amount of SMC raw materials into a pair of molds, and heat and mold the raw materials in the mold cavity under a certain temperature and pressure, and flow under pressure and fill the mold cavity to form the molding cycle. In the process of the composite molding material flowing and filling the mold cavity, not only the resin flows, but also the reinforcing material flows, so that the resin and fiber fill all parts of the mold cavity at the same time.

[0003] When demolding the formed hinge, the existing processing method is to use a cylinder or a push rod to push it upward from the top of the mold. However, since the newly formed hinge mold still has certain deficiencies in hardness, the hinge is easily damaged during the ejection process. In addition, a top plate needs to be opened at the bottom of the mold cavity during ejection, which will leave a gap when the hinge is formed, resulting in burrs on the hinge, which affects the effect of the finished product and reduces the yield rate. Therefore, this technical solution is proposed for improvement. Utility Model Content

[0004] The utility model aims to overcome the defect of hinges in the prior art that the product effect is affected when the product is taken out during the production process, and provides a one-mold two-cavity molding die for the hinge.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: a one-mold two-cavity molding die for a hinge, comprising an upper die and a lower die, the upper surface of the lower die is provided with a molding cavity, the side of the lower die is provided with an auxiliary oil cylinder, the output end of the auxiliary oil cylinder is rotatably provided with a molding rod, the molding rod extends into the interior of the molding cavity, and the end of the molding rod near the auxiliary oil cylinder is provided with a rotating rod for rotating the molding rod.

[0006] Furthermore, two molding cavities are provided on the lower mold, a pressing block is provided on the lower surface of the upper mold, and the top surface of the pressing block is connected to the upper mold through bolts.

[0007] Furthermore, the auxiliary oil cylinder is horizontally arranged on the side of the lower mold through a fixing rod.

[0008] Furthermore, a bearing is provided at the output end of the auxiliary oil cylinder, a sleeve is provided at the outer side of the bearing, and one end of the forming rod is fixedly arranged inside the sleeve.

[0009] Furthermore, the rotating rod is fixedly arranged on the outside of the sleeve, and the rod body of the rotating rod is connected to the fixed rod through a spring.

[0010] Furthermore, a sealing ring is provided at the connection between the forming rod and the lower mold.

[0011] The beneficial effects of the embodiments of the utility model are as follows: after the hinge is formed in the mold cavity, the demoulding process begins. At this time, the operator can rotate the rotating rod to make the molding rod rotate in the molding cavity under the action of the bearing. Since the molding rod extends into the interior of the molding cavity, its rotation will push the molded hinge out of the molding cavity. Different from the previous direct ejection from the top of the mold, the demoulding method is more gentle and is not easy to damage the newly formed hinge. Since there is no need to open a top plate at the bottom of the mold cavity, the problem of leaving gaps and forming burrs when the hinge is molded is avoided, thereby improving the quality and yield of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the overall structure of the utility model from another angle;

[0014] Figure 3 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0015] In the figure: 1, upper die; 101, pressing block; 2, lower die; 201, forming cavity; 202, forming rod; 3, auxiliary oil cylinder; 301, fixing rod; 302, sleeve; 303, rotating rod; 304, spring. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0017] See also Figures 1 to 3 The embodiment of the utility model discloses a one-mold two-cavity molding die for hinges. The die is intended to solve the problem in the prior art that the hinge is easily damaged and burrs are easily formed during demoulding. The die is mainly composed of an upper die 1 and a lower die 2. A molding cavity 201 is provided on the upper surface of the lower die 2. The preferred number of the molding cavities 201 is two, which increases the space utilization of the mold and is used to produce two hinge parts at the same time, thereby improving production efficiency. A pressing block 101 is provided on the lower surface of the upper die 1. The top surface of the pressing block 101 is connected to the upper die 1 by bolts, thereby ensuring a close fit between the upper die 1 and the lower die 2 during the molding process. At the same time, the pressing block 101 is easy to replace quickly after being worn, thereby improving production efficiency.

[0018] At least one auxiliary oil cylinder 3 is horizontally arranged at the side of the lower mold 2 and at the forming part of the hinge shaft hole, and is fixed to the lower mold 2 through a fixing rod 301. A bearing is arranged at the output end of the auxiliary oil cylinder 3, and a sleeve 302 is installed on the outer side of the bearing. A forming rod 202 is installed on the auxiliary oil cylinder 3, and one end of the forming rod 202 is fixedly arranged inside the sleeve 302. The sleeve 302 and the forming rod 202 can rotate freely relative to the auxiliary oil cylinder 3. At the same time, the setting of the sleeve 302 does not affect the auxiliary oil cylinder 3 to extend and retract the forming rod 202 inside the forming cavity 201, thereby ensuring the use effect. A sealing ring is arranged at the connection between the forming rod 202 and the lower mold 2 to ensure the sealing between the forming rod 202 and the lower mold 2 during the molding process to prevent the leakage of raw materials such as resin.

[0019] In order to facilitate the operation of the forming rod 202, a rotating rod 303 is fixedly arranged on the outer side of the sleeve 302. The rod body of the rotating rod 303 is connected to the fixed rod 301 through a spring 304. The rotating rod 303 can drive the sleeve 302 and the forming rod 202 to rotate. During the production process, the forming rod 202 will first penetrate into the molding cavity 201. After the raw material is formed, the upper mold 1 and the lower mold 2 are disengaged. The forming rod 202 will form the shaft hole on the hinge. Since the shaft hole is long, the forming rod 202 needs to be removed from the mold. Before removing, the rotating rod 303 needs to be manually rotated downward. Since the forming rod 202 and the formed hinge still have a certain degree of stickiness, Since the hinge hole is set on the side, the rotating rod 303 drives the forming rod 202 to rotate, so that one side of the hinge is tilted, increasing the space for taking the hinge, and at the same time the auxiliary oil cylinder 3 retracts to pull the forming rod 202 out of the forming cavity 201, so that the hinge after molding is disengaged, and the tilted hinge is easy to take out quickly. For the hinge with the shaft hole in the middle position, the rotating rod 303 can increase the gap between the hinge and one side of the forming cavity 201. After the forming rod 202 is threshed, the compressed air is blown into the gap with an air gun, so that the hinge is quickly disengaged from the inside of the forming cavity 201, reducing the damage to the hinge, greatly improving the production efficiency, and reducing the generation of burrs. The setting of the spring 304 drives the forming rod 202 to reset after the hinge is taken out, avoiding unnecessary interference during the molding process, and ensuring the use effect.

[0020] In summary, the one-mold two-cavity molding die for the hinge provided in this embodiment realizes a gentle and efficient demoulding process by arranging an auxiliary oil cylinder 3, a molding rod 202 and a rotating rod 303 on the side of the lower mold 2, effectively solving the problem of easy damage to the hinge and easy formation of burrs during demoulding in the prior art, thereby improving the production efficiency and product quality of the hinge.

[0021] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0024] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A two-cavity compression mold for hinges, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper surface of the lower mold (2) is provided with a molding cavity (201), the side surface of the lower mold (2) is provided with an auxiliary oil cylinder (3), the output end of the auxiliary oil cylinder (3) is rotatably provided with a molding rod (202), the molding rod (202) extends into the interior of the molding cavity (201), and the end of the molding rod (202) near the auxiliary oil cylinder (3) is provided with a rotating rod (303) for rotating the molding rod (202).

2. The hinge one-mold two-cavity molding die according to claim 1, characterized in that: Two molding cavities (201) are provided on the lower mold (2); a pressing block (101) is provided on the lower surface of the upper mold (1); and the top surface of the pressing block (101) is connected to the upper mold (1) via bolts.

3. The hinge one-mold two-cavity molding die according to claim 1, characterized in that: The auxiliary oil cylinder (3) is horizontally arranged on the side of the lower mold (2) via a fixing rod (301).

4. The hinge one-mold two-cavity molding die according to claim 3, characterized in that: A bearing is provided at the output end of the auxiliary oil cylinder (3), a sleeve (302) is provided outside the bearing, and one end of the forming rod (202) is fixedly arranged inside the sleeve (302).

5. The hinge one-mold two-cavity molding die according to claim 4, characterized in that: The rotating rod (303) is fixedly arranged on the outside of the sleeve (302), and the body of the rotating rod (303) is connected to the fixed rod (301) via a spring (304).

6. The hinge one-mold two-cavity molding die according to claim 1, characterized in that: A sealing ring is provided at the connection between the forming rod (202) and the lower mold (2).

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