Multi-curved surface universal mold making tool

Abstract

To provide a multi-curved surface universal mold making tool. The device includes a molding rod 1, a hinge unit 2, and a molding end block 3. The hinge unit is composed of multiple link pin holders whose ends are offset from each other and fixed together, forming a hinge row whose length is adjustable. The side surfaces are shaped to combine semicircular arcs and flat surfaces, improving molding accuracy. The molding end block has an inclined surface and a blind hole that engages with the molding rod to secure it, ensuring high accuracy. Furthermore, a buckle 5 is provided at one end of the hinge row, which is used to secure the hinge row in a wrapped state, allowing for easy operation and high accuracy.

Description

[Technical Field]

[0001] The present invention belongs to the technical field of mold making tools, and in particular to a universal mold making tool that can be used on multiple curved surfaces. [Background technology]

[0002] Currently, when connecting two tubular members at an angle, an opening must be made in the main pipe, and the opening's shape resembles a saddle. The end of the branch pipe must also be machined with a specially shaped notch that matches the opening in the main pipe. Furthermore, when welding two curved surfaces together, it is essential to pre-form the joint and mark the workpiece along the contour. Chinese invention patent application CN 117537692 A discloses a simple saddle opening forming tool. The tool includes a forming component, which includes the following components: A flexible plate, hollow portions uniformly arranged in the longitudinal cross-sectional direction of the flexible plate, lead strips arranged within the hollow portions, a partition plate uniformly arranged in the center of the outer wall of the flexible plate, strip grooves arranged symmetrically at both the upper and lower ends of the partition plate and connected to the flexible plate, and the strip grooves arranged perpendicular to the lead strips. This saddle opening shaping tool has multiple uniformly arranged grooves on a flexible plate, with telescopic positioning rods positioned opposite each groove, allowing the user to specify the inner diameter and shape of the saddle opening. The tool allows the user to open saddle openings of matching shapes on the branch pipe and main pipe. The tool also includes a rectangular and triangular plate for positioning, making it easy for the user to mark the saddle opening shape on the surface of the branch pipe and main pipe. However, in actual use, although the telescopic positioning rod can determine the inner diameter and shape of the saddle opening to some extent, the structure is a multi-layered sleeve configuration, which results in a large diameter, insufficient point density for shape acquisition, and difficulty in ensuring accuracy. Furthermore, the clamp structure fixing method is cumbersome and time-consuming, resulting in low work efficiency. Summary of the Invention

[0003] The present invention aims to provide a multi-surface universal mold making tool that solves the problems of the prior art, such as the lack of mold making accuracy and the complicated operation.

[0004] To achieve the above technical objectives, the present invention provides the following technical means: The multi-curved universal molding tool of the present invention includes a molding rod, a hinge unit, and a molding end block. The molding rod is made up of multiple rods, which also function as pin shafts for the hinge units. The multiple hinge units are connected via the molding rods to form a hinge row. A molding end block is attached to both ends of each molding rod. The hinge unit is composed of at least four link pin holders, an even number of which are divided into two sets, and are fixed together with their ends offset from each other. The link pin holders are rectangular, with pin insertion holes provided in the longitudinal direction, and the outer side of each widthwise side is semicircular and the inner side is flat. When the ends of the link pin holders are offset and connected, a boss is provided along the direction of the pin insertion hole, allowing for the attachment of an additional friction ring when inserting the molding rod in a subsequent process. The friction ring provides a damping effect to the movement of the molding rod and is made of an elastic or magnetic material. The molding end blocks attached to both ends of the molding rod have a rectangular structure and a blind hole on one end face in the longitudinal direction. The blind hole fits the outer diameter of the molding rod and is fixed by fitting when inserted. The other end of the molding end block in the longitudinal direction is formed with an inclined surface, and the pointed tip allows for more accurate molding. A buckle is provided at one end of the hinge row formed by the hinge units, and is used to secure the hinge row in a wrapped state. When taking a mold on a circular tube, it is necessary to lock it with the buckle.

[0005] Compared with the prior art, the advantages of the present invention are as follows: This device uses a hinge array and a molding rod to create molds, allowing for quick and easy molding by moving the rod. Particularly when molding cylindrical objects, the hinge array is wrapped around the object and secured with a buckle, allowing for accurate contours. Even when connecting multiple curved surfaces, molding can be completed quickly and with minimal effort. Furthermore, the hinge array of this device allows for the number of hinge units to be freely adjusted by inserting or removing the molding rod, making it possible to create hinge arrays of different lengths as needed. This provides excellent flexibility and high molding efficiency. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a schematic diagram of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the molding rod according to the present invention. [Figure 3] Part a of FIG. 3 is a schematic diagram of the hinge unit according to the present invention, part b is a left side view of part a, and part c is a right side view of part a. [Figure 4] Part a of Figure 4 is a schematic diagram of the molding end block according to the present invention, part b is a left side view of part a, and part c is a plan view of part a. [Figure 5] FIG. 5 is a schematic diagram of the buckle according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] As shown in FIG. 1, a hinge unit composed of four link pin holders will be described in detail as an example. The multi-curved universal molding tool of the present invention comprises a molding rod 1, a hinge unit 2, and a molding end block 3. The molding rod 1 is made up of multiple rods, and also functions as the pin shaft of the hinge unit 2. The multiple hinge units 2 are connected via the molding rod 1 to form a hinge row. A molding end block 3 is attached to both ends of each molding rod 1. As shown in part a of FIG. 3, the hinge unit 2 is composed of at least four even number of link pin holders. These link pin holders are divided into two sets: No. 1 link pin holder 2-1 and No. 2 link pin holder 2-2, and No. 3 link pin holder 2-3 and No. 4 link pin holder 2-4, which are fixed together with their ends offset from each other. As shown in parts b and c of Figure 3, the link pin holders are rectangular and have pin insertion holes along their length, arranged in the same order as the link pin holders: No. 1 pin insertion hole, No. 2 pin insertion hole, No. 3 pin insertion hole, and No. 4 pin insertion hole. The inner diameter of each pin insertion hole is designed to slide and fit with the outer diameter of the molding rod. The outer side of the link pin holder's widthwise sides is semicircular, while the inner side is flat.

[0008] When the ends of the link pin holders are offset and connected, a boss portion 2-5 is provided along the direction of the pin insertion hole, allowing an additional friction ring 4 to be attached when inserting the molding rod 1 in a subsequent process. The friction ring 4 provides a damping effect to the movement of the molding rod and is made of an elastic or magnetic material. If the molding rod is magnetic, the friction ring 4 is made of a magnetic or elastic material, and if it is non-magnetic, it is made of an elastic material. The molding end blocks 3 attached to both ends of the molding rod 1 have a rectangular parallelepiped structure, with a blind hole 3-2 formed in one longitudinal end face. The blind hole 3-2 fits the outer diameter of the molding rod 1 and is fixed by fitting into it when inserted. In addition, an inclined surface 3-1 is formed on the other longitudinal end of the molding end block 3, and the pointed tip portion allows for more accurate molding.

[0009] The connecting sequence between the molding rod 1, the hinge units 2 and the friction ring 4 is as follows. 1. Pass one end of the first molding rod 1 through the No. 3 pin insertion hole of the first hinge unit 2, pass the friction ring 4 through it, pass it through the No. 1 pin insertion hole of the second hinge unit 2, pass it through the No. 4 pin insertion hole of the first hinge unit 2, pass another friction ring 4 through it, and pass it through the No. 2 pin insertion hole of the second hinge unit 2. 2. The second molding rod 1 is connected to the third hinge unit 2 in the same order, and so on, connecting the fourth, fifth, ... up to the nth hinge unit 2 as needed to form a hinge row of the desired length. As shown in Figures 1 and 5, a buckle 5 is provided at one end of the hinge row formed by the hinge units 2, and is used to secure the hinge row in a wound state. When taking a mold on a circular tube, it is necessary to lock it with the buckle 5. This buckle 5 is provided with a shaft hole 5-1 and a locking hook 5-2.

[0010] The operation method of the present invention is as follows. 1. Determine the required length of the hinge row depending on the target workpiece. 2. Place the device on the surface to be molded. The surface can be curved or flat. 3. The hinge row is brought into close contact with the surface of the object. In the case of a tubular workpiece, the hinge row is wrapped around the surface of the circular tube. 4. Push out the molding rod 1 and press the tip of the molding end block 3 attached to the end of the rod against the curved surface of the other workpiece. At this time, hold the entire hinge row so that it does not move. 5. After molding, place the device on the workpiece and mark along the contour formed by the molding end block. 6. Cut the workpiece according to the marked outline. [Explanation of symbols]

[0011] 1 mold making rod 2 Hinge unit 2-1 No. 1 link pin holder 2-1a No. 1 pin insertion hole 2-2 No. 2 link pin holder 2-2a No. 2 pin insertion hole 2-3 No. 3 link pin holder 2-3a No. 3 pin insertion hole 2-4 No. 4 link pin holder 2-4a No. 4 pin insertion hole 2-5 Boss section 3. Molded end block 3-1 Slope 3-2 Blind hole 4 friction rings 5 Buckle 5-1 Shaft hole 5-2 Retaining hook

Claims

1. A multi-curved universal mold making tool including a mold making rod (1), a hinge unit (2) and a mold making end block (3), The multi-curved universal molding tool is characterized in that the molding rods (1) are made up of a plurality of rods, each of which also functions as a pin shaft for the hinge unit (2), the plurality of hinge units (2) are connected via the molding rods (1) to form a hinge row, and molding end blocks (3) are attached to both ends of each molding rod (1).

2. The multi-curved universal mold remover according to claim 1, characterized in that the hinge unit (2) is composed of at least four even number of link pin holders, which are divided into two sets of No. 1 link pin holder (2-1) and No. 2 link pin holder (2-2), and No. 3 link pin holder (2-3) and No. 4 link pin holder (2-4), and the ends of the link pin holders are offset from each other and fixed together.

3. The link pin holder has a rectangular shape and has pin insertion holes in its longitudinal direction, which are named pin insertion hole No. 1 (2-1a), pin insertion hole No. 2 (2-2a), pin insertion hole No. 3 (2-3a), and pin insertion hole No. 4 (2-4a) in the same order as the link pin holder, and the inner diameter of each pin insertion hole is designed to slide and fit with the outer diameter of the molding rod, and the outer side of both widthwise sides of the link pin holder is semicircular arc-shaped and the inner side is flat. This is the multi-curved universal molding tool described in claim 2.

4. The multi-curved surface universal molding tool of claim 2, characterized in that when the ends of the link pin holders are shifted and connected to each other, boss portions (2-5) are provided along the direction of the pin insertion holes, so that a friction ring (4) can be additionally attached when inserting the molding rod (1) in a subsequent process, the friction ring (4) provides a damping effect to the movement of the molding rod and is made of an elastic or magnetic material, and when the molding rod is magnetic, the friction ring (4) is made of a magnetic or elastic material, and when the molding rod is non-magnetic, it is made of an elastic material.

5. The molding end blocks (3) attached to both ends of the molding rod (1) have a rectangular structure, and one end face in the longitudinal direction thereof is provided with a blind hole (3-2), which fits the outer diameter of the molding rod (1) and is fixed by fitting into it when inserted, and the other end in the longitudinal direction of the molding end block (3) is formed with an inclined surface (3-1), the pointed tip of which enables more accurate molding. This is the multi-curved universal molding tool described in claim 1.

6. The multi-curved surface universal mold making tool according to claim 1 or claim 4, It is characterized in that the connecting sequence of the molding rod (1) with the plurality of hinge units (2) and friction ring (4) is as follows: That is, One end of the first molding rod (1) is passed through the No. 3 pin insertion hole (2-3a) of the first hinge unit (2), Passing through the friction ring (4), Pass it through the No. 1 pin insertion hole (2-1a) of the second hinge unit (2), Pass it through the No. 4 pin insertion hole (2-4a) of the first hinge unit (2), Pass another friction ring (4) through, Pass it through the No. 2 pin insertion hole (2-2a) of the second hinge unit (2). The second molding rod (1) is also connected to the third hinge unit (2) in the same order, and so on, connecting the fourth, fifth, ..., up to the nth hinge unit (2) as needed to form a hinge row of the desired length.

7. The multi-curved universal molding tool of claim 1, characterized in that a buckle (5) is provided at one end of the hinge row formed by the hinge units (2), which is used to fix the hinge row in a wound state, and when molding on a circular tube, it is necessary to lock it with the buckle (5), and the buckle (5) is provided with an axial hole (5-1) and a locking hook (5-2), and the axial hole (5-1) and the molding rod (1) are slidably connected.

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