CN213648446U - Integral injection molding mold core of emitter tail nut - Google Patents

Abstract

The utility model relates to an injection moulding field of communication transmitter connecting piece, specific disjunctor formula injection moulding mold core of transmitter afterbody nut that says so. The anti-skid screw rod comprises a cylindrical core and a conical core movably connected to the upper end of the cylindrical core through a positioning bolt, wherein a forming table is arranged on the upper portion of the cylindrical core along the circumferential direction, forming wires corresponding to internal threads of a tail nut are arranged on the circumferential surface of the forming table, and forming grooves corresponding to anti-skid convex ribs on the inner side of the end wall with holes of the tail nut are arranged on the conical surface of the conical core; the utility model discloses the process of taking out a mould to the tail end nut that has the protruding muscle of antiskid avoids the protruding muscle of antiskid impaired, guarantees the production quality of afterbody nut product to improve drawing of patterns efficiency.

Description

Integral injection molding mold core of emitter tail nut

Technical Field

The utility model relates to an injection moulding field of communication transmitter connecting piece, specific disjunctor formula injection moulding mold core of transmitter afterbody nut that says so.

Background

Tail nuts are important connectors for the launch end of a communications transmitter and are typically made from nylon or other insulating material by an injection molding process. As shown in fig. 7, the injection mold core is provided with an annular forming table at the upper end periphery of the mold core, the forming table and an inner ring groove with a corresponding shape at the inner side of an outer mold jointly enclose a forming cavity corresponding to the shape of the tail nut, and forming wires are arranged at the outer part of the forming groove along the circumferential direction, so that after the injection molding is completed, threads are formed at the inner side of the cylindrical periphery wall of the tail nut.

With the improvement of the quality requirement of communication equipment, the friction resistance between the tail nut and the end of the emitter needs to be increased, so that a plurality of anti-skid convex ribs (as shown in fig. 5 and 6) are arranged at the end part with holes of the tail nut, and the anti-skid effect is achieved through the friction force between the anti-skid convex ribs and the end face of the end part of the emitter. But the increase of the antiskid convex ribs brings certain difficulty to the integral injection molding and manufacturing of the tail nut. Fig. 7 shows the situation in which the core, i.e. the tail nut, is removed from the outer die during the machining of the tail nut without the anti-slip bead. At the moment, the lower end of the clamping fixed mold core is screwed with the tail nut or the clamping fixed tail nut is screwed with the lower end of the mold core, so that the mold core and the tail nut can be separated under the matching of the threads and the forming wires. However, in the process of processing the nut at the tail part of the rib to be prevented from sliding, if the nut at the tail part and the mold core are directly and relatively rotated, the anti-sliding rib formed by injection molding and the forming groove corresponding to the anti-sliding rib are necessarily and relatively rotated synchronously. Under the condition that the flexibility of the injection molding material is poor, the anti-skid convex rib is easily broken or cracked by the forming groove when the tail screw cap or the column core is screwed, and the quality of a final product is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a disjunctor formula mold core of moulding plastics of transmitter afterbody nut avoids the protruding muscle of antiskid impaired to the form removal process of the tail end nut that has the protruding muscle of antiskid to guarantee the production quality of afterbody nut product, and improve drawing of patterns efficiency.

In order to solve the technical problem, the utility model discloses a technical scheme be: an integrated injection mold core of a tail nut of an emitter comprises a cylindrical core and a conical core movably connected to the upper end of the cylindrical core through a positioning bolt, wherein a forming table is arranged on the upper portion of the cylindrical core along the circumferential direction, forming wires corresponding to internal threads of the tail nut are arranged on the circumferential surface of the forming table, and forming grooves corresponding to anti-skidding convex ribs on the inner side of a perforated end wall of the tail nut are arranged on the conical surface of the conical core;

the conical core is provided with pins which are distributed concentrically, the central position of the upper end face of the cylindrical core is provided with a pin hole which is used for the rotation of the pin and is matched with the axial sliding, the bottom of the pin hole on the cylindrical core is also provided with a threaded hole which is matched and connected with a positioning bolt, the head end of the positioning bolt penetrates through a step hole arranged in the pin and then is connected with the threaded hole, the tail end of the positioning bolt is matched with the step position interval of the step hole, and the interval between the tail end of the positioning bolt and the step of the step hole is smaller than the height of the cylindrical peripheral wall of the tail nut.

Preferably, the stepped bores are distributed through the axis of the pin.

Preferably, the screw rod of the positioning bolt is provided with a positioning boss which is installed at the bottom of the pin hole in a positioning fit mode, the part, located on the screw rod, of the positioning boss facing the tail of the positioning bolt is a polished rod, and the part, located on the screw rod, of the positioning boss, back on the tail of the positioning bolt is a threaded portion and is installed in a fit mode with the threaded hole.

Preferably, the height of the portion of the stud extending into the pin bore is less than the depth of the pin bore.

Preferably, the cylindrical core and the positioning bolt are all made of stainless steel materials.

Advantageous effects

The utility model provides a but through pin and pinhole rotatable coupling and axial displacement between toper core and the cylindricality core. With the afterbody nut by the utility model discloses on pluck the drawing of patterns in-process, through pressing from both sides tight cylindricality core and afterbody nut respectively and rotate the cylindricality core alone, can rotate the cylindricality core and deviate from the afterbody nut with the cylindricality core along the axial under the static condition of toper core to avoid the toper core to rotate in step in order to cause the rupture or the damage that the shaping groove produced to the protruding muscle of antiskid.

The taper core and the cylindrical core are connected through the tail end of the positioning bolt and the positioning fit of the step hole positioning in the pin arranged on the taper core, the cylindrical core is rotated by the tail nut and axially deviates from the process, the axial tension is applied to the taper core through the positioning bolt by the cylindrical core, so that the taper core deviates from the tail nut at the middle interval, namely, the taper core only rotates through the cylindrical core to be capable of deviating from the tail nut integrally, the demoulding efficiency is high, and the production efficiency of the tail nut is improved.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of the injection molded tail nut of the present invention after being removed from the outer mold;

FIG. 2 is a schematic structural view of a positioning bolt portion of the present invention;

fig. 3 is a schematic perspective view of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the injection molded tail nut of the present invention after being removed from the outer mold;

FIGS. 5 and 6 are schematic perspective views of a tail nut with anti-slip ribs;

FIG. 7 is a cross-sectional view of a conventional mold core for making a tail nut according to the prior art;

the labels in the figure are: 1. the anti-skidding type forming device comprises a conical core, 101, a pin, 102, a forming groove, 103, a stepped hole, 2, a tail nut, 201, a cylindrical peripheral wall, 202, a hole end wall, 203, an anti-skidding convex rib, 3, a positioning bolt, 301, a positioning boss, 4, a cylindrical core, 401, a threaded hole, 402, a pin hole, 403, a forming table, 404 and a forming wire.

Detailed Description

As shown in fig. 1, fig. 3 and fig. 4, the utility model discloses a disjunctor formula mold core of moulding plastics of transmitter afterbody nut, major structure are stainless steel material, including cylindrical core 4 and through positioning bolt 3 swing joint at the conical core 1 of 4 upper end positions of cylindrical core. Conical core 1 can coaxial rotation in the upper end of cylindricality core 4, can follow the specific distance of axial displacement again to avoid causing the damage and only can with rotating cylindricality core 4 to the protruding muscle 203 of antiskid at the in-process with 2 desorption of afterbody nuts the utility model discloses wholly deviate from by the lower extreme of afterbody nut 2.

A forming table 403 is provided on the upper portion of the cylindrical core 4 along the circumferential direction, and forming threads 404 corresponding to the internal threads of the tail nut 2 are provided on the circumferential surface of the forming table 403. The conical surface of the conical core 1 is provided with a molding groove 102 corresponding to the anti-slip rib 203 at the inner side of the perforated end wall 202 of the tail nut 2. After the present invention is butted with the outer mold in the posture of fig. 1, a molding cavity corresponding to the shape of the tail nut 2 is formed at the outer mold, the position of the molding table 403 of the cylindrical core 4 and the position of the conical surface of the conical core 1. And injecting a molding material in a hot melting state into the molding cavity and cooling to complete the injection molding of the tail nut 2. When the screw passes through, an anti-slip rib 203 conforming to the shape of the molding groove 102 is formed on the inner side of the holed end wall 202 of the tail nut 2, and a screw corresponding to the shape of the molding wire 404 is formed on the inner side of the cylindrical peripheral wall 201 of the tail nut 2.

The utility model discloses in, be equipped with the pintle 101 that distributes with one heart along its axial on toper core 1, put at the central point of the 4 upper end terminal surfaces of cylindricality core and offered and supply pintle 101 to rotate and axial sliding fit's pinhole 402. The height of the part of the pin 101 extending into the pin hole 402 is less than the depth of the pin hole 402, so that the large end of the conical core 1 is tightly attached to the upper end surface of the cylindrical core 4, and a gap is prevented from being generated between the large end and the cylindrical core. The bottom of the pin hole 402 on the cylindrical core 4 is further provided with a threaded hole 401 connected with the positioning bolt 3 in a matching manner, and the head end of the positioning bolt 3 penetrates through the stepped hole 103 arranged in the pin 101 and then is connected with the threaded hole 401.

As shown in fig. 1, the tail end of the positioning bolt 3 is engaged with the step position of the step hole 103 at a distance, and the purpose thereof is: in the demolding process, if the tail end of the positioning bolt 3 is tightly pressed on the step of the step hole 103, the positioning bolt 3 and the step hole 103 generate friction force after the cylindrical core 4 rotates, and then the friction force is transmitted to the conical core 1, and if the cylindrical core 4 is driven by the friction force to synchronously rotate, the anti-skid convex rib 203 is still easily damaged. The height of the gap between the tail end of the positioning bolt 3 and the step position of the step hole 103 in this embodiment is smaller than the height of the cylindrical peripheral wall of the tail nut 2, so that the tapered core 1 is connected to the cylindrical core 4 in the axial direction by the positioning bolt 3 before the cylindrical core 4 is removed from the tail nut 2, and the tapered core 1 is pulled out from the tail nut 2 by the axial tension generated by the rotation of the cylindrical core 4.

As shown in fig. 2, the screw of the positioning bolt 3 has a positioning boss 301 which is installed at the bottom of the pin hole 402 in a positioning fit manner. The part of the screw rod, which is positioned on the positioning boss 301 and faces the tail part of the positioning bolt 3, is a polished rod, the polished rod part rotates and is in sliding fit with the small hole part of the stepped hole 103, and the polished rod part and the small hole of the stepped hole 103 as well as the tail end of the positioning bolt 3 and the step of the stepped hole 103 are in smooth fit, so that unnecessary friction force is avoided. The part of the screw rod, which is opposite to the tail part of the positioning bolt 3, of the positioning boss 301 is a threaded part and is installed in a matching way with the threaded hole 401, so that the installation position of the positioning bolt 3 is fixed through the positioning boss 301.

The utility model discloses at the drawing of patterns in-process under the state of fig. 4, at first by the fixed afterbody nut 2 of anchor clamps centre gripping, by the lower extreme position and the rotation of another anchor clamps centre gripping fixed column shape core 4, cylindricality core 4 is along 2 axial downstream of afterbody nut under the internal screw thread mating reaction of shaping silk 404 and afterbody nut 2 promptly, and the toper west is then motionless. After the cylindrical core 4 continuously moves downwards until the head of the positioning bolt 3 contacts with the step position of the step hole 103, the cylindrical core 4 drives the conical core 1 to synchronously move downwards, and the conical core 1 adhered to the tail nut 2 is separated downwards. In the process, because the contact surfaces of the tail end of the positioning bolt 3 and the step of the step hole 103 are smooth surfaces, the generated friction force is small, so the conical core 1 still does not rotate, and the anti-skid convex rib 203 is prevented from being damaged.

Claims (5)

1. The utility model provides a disjunctor formula mold core of moulding plastics of transmitter afterbody nut which characterized in that: the anti-skid screw forming device comprises a cylindrical core (4) and a conical core (1) movably connected to the upper end of the cylindrical core (4) through a positioning bolt (3), a forming table (403) is arranged on the upper portion of the cylindrical core (4) along the circumferential direction, forming wires (404) corresponding to internal threads of a tail nut (2) are arranged on the circumferential surface of the forming table (403), and forming grooves (102) corresponding to anti-skid convex ribs (203) on the inner side of a perforated end wall (202) of the tail nut (2) are formed in the conical surface of the conical core (1);

the taper core (1) is provided with pins (101) which are distributed concentrically, the center position of the upper end face of the cylindrical core (4) is provided with a pin hole (402) which is used for the rotation of the pin (101) and is in axial sliding fit, the bottom of the pin hole (402) on the cylindrical core (4) is also provided with a threaded hole (401) which is connected with the positioning bolt (3) in a matched mode, the head end of the positioning bolt (3) penetrates through a step hole (103) formed in the pin (101) and then is connected with the threaded hole (401), the tail end of the positioning bolt (3) is matched with the step position of the step hole (103) in a spaced mode, and the distance between the tail end of the positioning bolt (3) and the step of the step hole (103) is smaller than the height of the cylindrical peripheral wall (201) of the tail nut (2.

2. The integral injection mold core of the emitter tail nut of claim 1, wherein: the stepped holes (103) are distributed through the axis of the pin (101).

3. The integral injection mold core of the emitter tail nut of claim 1, wherein: the screw rod of positioning bolt (3) has location boss (301) that location fit installed in pinhole (402) bottom position, and the part that lies in location boss (301) on the screw rod towards positioning bolt (3) afterbody is the polished rod, and the part that lies in positioning boss (301) on the screw rod and is carried on the back of the body of positioning bolt (3) is screw thread portion and with screw hole (401) cooperation installation.

4. The integral injection mold core of the emitter tail nut of claim 1, wherein: the height of the part of the pin (101) extending into the pin hole (402) is less than the depth of the pin hole (402).

5. The integral injection mold core of the emitter tail nut of claim 1, wherein: the cylindrical core (4), the cylindrical core (4) and the positioning bolt (3) are all made of stainless steel materials.

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