Screw forming die

Abstract

The utility model discloses a screw forming die which comprises a fixed die body located on the left side and a movable die body located on the right side, a screw forming cavity is formed between the movable die body and the fixed die body, the left half portion of the screw forming cavity is formed in the fixed die body, and the right half portion of the screw forming cavity is formed in the movable die body. The screw forming cavity comprises a rotating part forming cavity arranged close to the upper portion and a stud part forming cavity arranged close to the lower portion, a first guide hole coaxial with the screw forming cavity is formed between the fixed die and the movable die, and the lower end of the first guide hole is connected with the rotating part forming cavity. A first guide hole is formed in the fixed die, the left half part of the first guide hole is formed in the fixed die, the right half part of the first guide hole is formed in the movable die, an insert matched with the first guide hole is connected in the first guide hole in a sliding mode, the insert is connected with the fixed die and is not connected with the movable die, and a profiling protrusion for forming a screw rotating groove is arranged at the lower end of the insert. The forming mold has the advantages of being high in specificity, convenient to demold, complete in overall function and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould manufacturing technical field more specifically, it relates to a screw forming die. BACKGROUND

[0002] Plastic screw usually also uses injection molding process to produce manufacture. But it is different from traditional plastic part demolding, because the threaded part of the stud part cannot be demolded directly along the axial direction, so the mold split surface is arranged on the longitudinal section, and the rotation groove on the rotation part needs to be demolded along the axial direction during forming, which is high in mold design difficulty and poor in overall effect. Accordingly, the utility model provides a screw forming die. UTILITY MODEL CONTENTS

[0003] The utility model discloses a screw forming die which has the characteristics of strong speciality and convenient demolding.

[0004] To solve the above technical problems, the utility model aims at realizing the following: a screw forming die, which comprises a fixed mold on the left side and a movable mold on the right side, a screw forming cavity is arranged between the movable mold and the fixed mold, the left half of the screw forming cavity is arranged on the fixed mold, and the right half is arranged on the movable mold, the screw forming cavity comprises a rotation part forming cavity arranged on the upper side and a stud part forming cavity arranged on the lower side, a first guide hole coaxial with the screw forming cavity is arranged between the fixed mold and the movable mold, the lower end of the first guide hole is connected with the rotation part forming cavity, the left half of the first guide hole is arranged on the fixed mold, and the right half is arranged on the movable mold, a matching insert block is slidably connected in the first guide hole, the insert block is connected with the fixed mold and not connected with the movable mold, and a profiling convex for forming a screw rotation groove is arranged on the lower end of the insert block.

[0005] The utility model is further provided with an avoiding hole arranged on the fixed mold, the left end of the avoiding hole is connected with the outside, and the right end is connected with the first guide hole, an inclined rod is arranged in the avoiding hole and connected with the movable mold, a second guide hole is arranged on the insert block and matched with the inclined rod, and the insert block is slidably connected with the inclined rod; when the inclined rod moves to the left, the insert block moves downward.

[0006] The utility model is further provided with a limiting sliding groove arranged in the first guide hole and on the fixed mold, the limiting sliding groove extends vertically, a limiting sliding block is slidably connected in the limiting sliding groove, and the limiting sliding block is arranged on the insert block.

[0007] The utility model is further provided with that the upper end of the first guide hole is connected with the outside.

[0008] The utility model is further provided with that the insert block is in the shape of a cylinder.

[0009] In summary, the utility model has the following beneficial effects:

[0010] 1. By making open mould along the radial direction of the forming screw, the thread can be formed, and the screw blanking is also facilitated.

[0011] 2. By setting the inclined rod with the insert block, the insert block can be automatically returned while the mould is opened, so that the interference between the demoulding screw and the profiling convex is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the overall structure schematic view of the utility model;

[0013] Figure 2 is the structure schematic view of the utility model for embodying the movable mould;

[0014] Figure 3 is the structure schematic view of the utility model for embodying the fixed mould;

[0015] Figure 4 is the structure schematic view of the utility model for embodying the insert block. DETAILED DESCRIPTION

[0016] In order to make the skilled in the art better understand the technical scheme of the utility model, the preferred implementation scheme of the utility model is described below in combination with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not the limitation of the utility model patent claims. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0017] The utility model is further illustrated below in combination with the drawings and the preferred embodiments.

[0018] Embodiment 1

[0019] Referring to Figures 1 to 4As shown, the screw forming die of the embodiment comprises a fixed die 1 on the left side and a movable die 2 on the right side, the movable die 2 is provided with a screw forming cavity between the fixed die 1, the left half of the screw forming cavity is provided on the fixed die, and the right half is provided on the movable die, the screw forming cavity comprises an upper rotating part forming cavity 3 and a lower stud part forming cavity 4, the fixed die 1 and the movable die 2 are provided with a first guide hole 5 coaxial with the screw forming cavity, the lower end of the first guide hole 5 is connected with the rotating part forming cavity 3, the left half of the first guide hole 5 is provided on the fixed die, and the right half is provided on the movable die, the first guide hole 5 is slidably connected with a matching insert block 6, the insert block 6 is connected with the fixed die and not connected with the movable die, and the lower end of the insert block 6 is provided with a profiling protrusion 7 for forming a screw rotating groove.

[0020] Further, the fixed die 1 is provided with an avoidance hole 8 connected with the outside at the left end and connected with the first guide hole at the right end, the avoidance hole 8 is provided with an inclined rod 9 connected with the movable die at the right end, the insert block 6 is provided with a second guide hole 10 for the inclined rod to pass through and matched with the second guide hole 10, and the insert block 6 is also slidably connected with the inclined rod 9; when the inclined rod 9 moves left, the insert block 6 moves down.

[0021] Further, the first guide hole 5 is provided with a limiting sliding groove 11 provided on the fixed die, the limiting sliding groove 11 extends vertically up and down, the limiting sliding groove 11 is slidably connected with a limiting sliding block 12, and the limiting sliding block 12 is provided on the insert block 6.

[0022] Further, the insert block 6 is in a cylindrical shape.

[0023] In the embodiment, when the movable die 2 and the fixed die 1 are gradually closed, the inclined rod 9 moves left in linkage, under the guidance of the second guide hole 10, the insert block 6 moves down, until the lower end surface of the insert block 6 is flush with the upper end surface of the rotating part forming cavity 3, and the profiling protrusion 7 on the insert block 6 extends into the rotating part forming cavity 3 to form a rotating groove for the screw. When the movable die 2 and the fixed die 1 are gradually opened, the inclined rod 9 moves right in linkage, under the guidance of the second guide hole 10, the insert block 6 moves up, until the profiling protrusion 7 on the insert block 6 is separated from the rotating part forming cavity 3, so as to open the mold and demold the screw.

[0024] Wherein, through the cooperation of the limiting sliding groove 11 and the limiting sliding block 12, the limiting and guiding effect of the insert block 6 relative to the fixed die 1 is achieved when the insert block 6 slides.

[0025] Embodiment 2

[0026] Referring to Figures 1 to 4 As shown, the screw forming die of the embodiment is further provided that the upper end of the first guide hole 5 is connected with the outside on the basis of embodiment 1.

[0027] In the embodiment, by setting the upper end of the first guide hole 5 as a structure connected with the outside, not only the first guide hole 5 is facilitated to be processed, but also the subsequent assembly is facilitated.

[0028] The screw forming die relates to the technical field of screw forming die, and has the advantages of convenient screw blanking and automatic back-off of an insert when the die is opened, and the like.

[0029] Unless otherwise specified and limited, in the utility model, if there are terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, the orientation or positional relationship is based on the actual shown orientation or positional relationship, and is only for the convenience of describing the utility model and simplifying the description, and therefore the utility model does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore the terms describing the orientation or positional relationship in the utility model are only used for example description, and cannot be understood as a limitation on the patent, and for ordinary skilled persons in the art, the specific meaning of the above terms can be understood according to the specific circumstances and the embodiments.

[0030] Unless otherwise specified and limited, in the utility model, if there are terms "setting", "connection" and "connection", they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through an intermediate medium, and can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] The above detailed the preferred embodiments of the utility model. It should be understood that ordinary skilled persons in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A screw forming mold, comprising a fixed mold located on the left and a movable mold located on the right, wherein a screw forming cavity is provided between the movable mold and the fixed mold, the left half of the screw forming cavity is formed on the fixed mold and the right half is formed on the movable mold, the screw forming cavity comprising a rotating part forming cavity arranged at the top and a stud part forming cavity arranged at the bottom, characterized in that: A first guide hole is provided between the fixed mold and the moving mold, which is coaxial with the screw forming cavity. The lower end of the first guide hole is connected to the rotating part forming cavity. The left half of the first guide hole is opened on the fixed mold and the right half is opened on the moving mold. A matching insert is slidably connected in the first guide hole. The insert is connected to the fixed mold but not to the moving mold. The lower end of the insert is provided with a contoured protrusion for forming the screw rotating groove.

2. The screw forming mold according to claim 1, characterized in that: The fixed mold has a clearance hole with its left end connected to the outside and its right end connected to the first guide hole. A slanted rod with its right end connected to the moving mold passes through the clearance hole. The insert has a second guide hole for the slanted rod to pass through and to match it. The insert is also slidably connected to the slanted rod. When the slanted rod moves to the left, the insert moves downward.

3. The screw forming mold according to claim 1 or 2, characterized in that: The first guide hole is provided with a limiting slide groove on the fixed mold. The limiting slide groove extends vertically up and down. A limiting slider is slidably connected in the limiting slide groove and is provided on the insert.

4. The screw forming mold according to claim 3, characterized in that: The upper end of the first guide hole is connected to the outside.

5. The screw forming mold according to claim 1, characterized in that: The insert is cylindrical.

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