CN213107997U

CN213107997U - Novel structure of mould core with insert for injection molding pipe fitting

Info

Publication number: CN213107997U
Application number: CN202021858833.9U
Authority: CN
Inventors: 赵浪; 褚红波; 黄桑
Original assignee: Linhai Weixing New Building Materials Co Ltd
Current assignee: Linhai Weixing New Building Materials Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-04
Anticipated expiration: 2030-08-31

Abstract

The utility model belongs to the technical field of injection moulding pipe fitting mould technique and specifically relates to a new structure of injection moulding pipe fitting area inserts mould core. This injection molding pipe fitting takes insert mould core new construction includes: the front mould is provided with a cavity corresponding to the outer surface of the injection molding pipe fitting, the rear mould is provided with a core corresponding to the inner surface of the injection molding pipe fitting, the cavity and the core are matched to form a space for molding the injection molding pipe fitting, the front mould is also provided with a core for connecting an insert, the core comprises a first section and a second section, the first section is fixedly connected with the front mould, the second section corresponds to the inner surface of the insert, and the first section is fixedly connected with the second section. The utility model discloses a core has first section and second section, and first section is connected fixedly with the second section, owing to just only the second section with the inserts contact, consequently, in-process core when wearing and tearing of cooperation, production only need change the second section of core can, not only change the convenience, still saved cost, the time of changing.

Description

Novel structure of mould core with insert for injection molding pipe fitting

Technical Field

The utility model belongs to the technical field of injection moulding pipe fitting mould technique and specifically relates to a new structure of injection moulding pipe fitting area inserts mould core.

Background

Insert molding is a molding method in which a predetermined insert made of a different material is placed in a mold, a resin is injected, and the molten material is bonded to the insert and solidified to form an integrated product.

Referring to fig. 1, the chinese invention with the publication number CN104653935B discloses an insert type injection molding pipe fitting joint, which comprises an insert and a pipe fitting main body part, wherein the pipe fitting main body part comprises a combining part and a connecting part, and the combining part and the connecting part are fixedly connected in a sealing manner; the insert is sleeved with the connecting part; the method is characterized in that: the outer side wall of the insert is provided with an annular bulge, and the annular bulge surrounds the outer surface of the insert by a circle; the inner side wall of the connecting part is provided with a groove corresponding to the annular bulge in shape, and the groove surrounds the inner side wall of the connecting part for a circle; the annular bulge is embedded in the groove. The annular bulge is embedded in the groove, so that the contact area between the insert and the connecting part can be increased, and the bonding strength of the pipe fitting joint is further improved; the insert and the pipe fitting main body are combined in an injection molding mode, and the processing difficulty cannot be increased due to the thickness problem of the insert wall.

In the prior art, 1, when a core is damaged, the whole core needs to be replaced, and the replacement is troublesome; 2. the inserts installed in the mold generally have the problem of size deviation, and after the inserts are produced for a period of time along with injection molding, the cores can expand to cause the contact between the cores and the inserts to be too tight, and after the mold is opened, the inner surfaces of the inserts are extremely easy to be scratched when the inserts are separated from the cores.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pipe fitting inserts product mould core new construction moulds plastics, not only the core is convenient to be changed, can also avoid the inserts internal surface to strain.

For reaching the advantage, the utility model provides a pair of mould core new construction is taken to injection molding pipe fitting, include: the front mould is provided with a cavity corresponding to the outer surface of the injection molding pipe fitting, the rear mould is provided with a core corresponding to the inner surface of the injection molding pipe fitting, the cavity and the core are matched to form a space for molding the injection molding pipe fitting, the front mould is also provided with a core for connecting an insert, the core comprises a first section and a second section, the first section is fixedly connected with the front mould, the second section corresponds to the inner surface of the insert, and the first section is fixedly connected with the second section.

In an embodiment of the new structure of the insert mold core for injection molding pipe fitting of the present invention, the second section of the core is made of transparent fluoroplastic.

The utility model discloses an in the embodiment of injection molding pipe fitting area inserts mould core new construction, first section is equipped with the location arch, the second section be equipped with this location protruding complex positioning groove.

In an embodiment of the new structure of the mold core for injection molding of pipe fittings with inserts of the present invention, the first section is fixed to the second section by screws or bolts.

The utility model discloses an in the embodiment of injection molding pipe fitting area inserts mould core new construction, the die cavity the core the central axis of core is same straight line.

The utility model discloses an in the embodiment of injection molding pipe fitting area inserts mould core new construction, the die cavity is equipped with prevents the inserts with the spacing face of excessive is connected to the core.

The utility model discloses an in the embodiment of injection molding pipe fitting area inserts mould core new construction, the inserts global be equipped with be used for anti-drop's first annular groove and second annular groove, the terminal surface of inserts be equipped with be used for prevent with a plurality of archs of injection molding pipe fitting interact.

The utility model discloses an in the embodiment of injection molding pipe fitting area inserts mould core new construction, bellied quantity is eight, is circumference evenly distributed respectively.

The utility model discloses in, the core has the first section of being connected fixedly with the front mould, the second section that corresponds with the inserts internal surface, and first section is connected fixedly with the second section, owing to just only the second section with the inserts contact, consequently, in-process core when cooperation, production only need change the core the second section can, not only change the convenience, still saved the cost, the time of changing.

The utility model discloses in, the second section of core is made by transparent fluoroplastics, has avoided leading to core and inserts contact tension along with moulding plastics production after a period because of the core inflation, and when the inserts breaks away from the core behind the mould die sinking, the problem that the inserts internal surface was strained easily.

Drawings

Fig. 1 is a schematic structural view of an insert injection molded pipe fitting joint of the prior art.

Fig. 2 is a schematic structural diagram of the joint between the injection molding pipe fitting and the insert of the new structure of the injection molding pipe fitting with the insert mold core according to the first embodiment of the present invention.

Fig. 3 is a schematic view of the insert of fig. 2.

Fig. 4 is a schematic cross-sectional view of the injection molded tube of fig. 2 engaged with an insert.

Fig. 5 is a partial exploded view of a new structure of a mold core with an insert for injection molding pipe according to a first embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of the new construction of the injection molded pipe insert mold core of FIG. 5.

FIG. 7 is a schematic cross-sectional view of a core of the new construction of the injection molded pipe with insert mold core of FIG. 5.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 2-7, the new structure of the mold core with insert for injection molding pipe of the first embodiment of the present invention comprises: a front mold and a rear mold. The front die comprises an upper die fixing plate 1 and an upper die plate 2, and the rear die comprises a lower die fixing plate, a pair of die feet, an ejector plate located between the pair of die feet and a lower die plate. The upper die fixing plate 1 is fixedly connected with the upper die plate 2, and the lower die fixing plate penetrates through the pair of die feet to be fixedly connected with the lower die plate. The ejector plate can slide between the lower die fixing plate and the lower die plate.

The front mold is provided with a cavity 21 corresponding to the outer surface of the injection molding pipe fitting 100, the rear mold is provided with a core 31 corresponding to the inner surface of the injection molding pipe fitting 100, and the cavity 21 and the core 31 are matched to form a molding space of the injection molding pipe fitting 100. The front mould is also provided with a core 23 for attaching the insert 4, the core 23 comprising a first section 231 secured to the front mould, a second section 232 corresponding to the inner surface of the insert 4, the first section 231 being secured to the second section 232. The central axes of the cavity 21, the core 31 and the core 23 are the same straight line.

Specifically, the upper mold plate 2 is provided with a plurality of cavities 21, and the lower mold plate fixes a plurality of cores 31 respectively corresponding to the cavities 21. The bottom of the core 31 is provided with a rotation prevention surface 311 to prevent the core 31 from rotating relative to the lower template. The radial dimension of the first section 231 is slightly larger than the radial dimension of the second section 232.

In other embodiments, the upper mold core is fixedly connected to the upper mold plate 2, the upper mold core is provided with a plurality of cavities 21, and the hardness of the material selected by the upper mold core is higher than that of the upper mold plate 2, so that the abrasion is reduced, and the service life of the mold is prolonged.

Second section 232 of core 23 is made of a clear fluoroplastic. Due to the characteristics of the material, the second section 232 can not deform when being boiled in 100 ℃ boiled water for 5 hours. The first section 231 is provided with a positioning protrusion 233, and the second section 232 is provided with a positioning groove 234 engaged with the positioning protrusion 233. The first section 231 and the second section 232 are fixed by screws or bolts. The cavity 21 is provided with a limiting surface 211 for preventing the insert 4 from being connected with the core 23 to be positioned excessively. The end surface of the core 31 contacts the end surface of the second segment 232.

In other embodiments of the present invention, the first section 231 may be provided with a positioning groove 234, and the second section 232 may be provided with a positioning protrusion 233.

The insert 4 comprises a sleeve end 41 and a joint end 42, a first annular groove 421 and a second annular groove 422 for preventing falling are arranged on the circumferential surface of the joint end 42, and a plurality of protrusions 423 for preventing mutual rotation with the injection-molded pipe fitting 100 are arranged on the end surface of the joint end 42.

Preferably, the number of the protrusions 423 is eight, and the protrusions are evenly distributed on the circumference. The insert 4 is made of a metal material.

The new structure using principle of the mold core 23 with the insert 4 of the injection molding pipe fitting 100 is as follows: manually sleeving the insert 4 outside the core 23 in a mold opening state; the end face of the sleeving end 41 of the insert 4 abuts against the limiting surface to complete sleeving, the mold is closed, glue is injected into the mold to quickly form the injection molding pipe fitting 100, and after cooling for a certain time, the injection molding pipe fitting 100 is combined with the insert 4 for solidification; the front mold and the rear mold are separated, in the separation process, the insert 4 is separated from the core 23 under the driving of the injection molding pipe fitting 100, and then the injection molding pipe fitting 100 is ejected out of the mold core 31 through the ejector pin to complete the demolding.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. The utility model provides an injection molding pipe fitting area inserts mould core new construction, includes: the injection molding die is characterized in that the front die is also provided with a core for connecting an insert, the core comprises a first section and a second section, the first section is fixedly connected with the front die, the second section corresponds to the inner surface of the insert, and the first section is fixedly connected with the second section.

2. The new structure of the mold core for injection molding of tubular parts with inserts according to claim 1, wherein said second section of the core is made of a transparent fluoroplastic.

3. The new structure of the mold core for injection molding of pipe fittings with inserts according to claim 2, characterized in that the first section is provided with a positioning protrusion and the second section is provided with a positioning groove matched with the positioning protrusion.

4. The new structure of the mold core for injection molding of pipe fittings with inserts of claim 3, wherein the first section and the second section are fixed by screw or bolt connection.

5. The new structure of the mold core for injection molding of pipe fittings with inserts as claimed in claim 4, wherein the central axes of the cavity, the core and the core are collinear.

6. The new structure of the mold core for injection molding of pipe fittings with inserts as claimed in claim 5, wherein the cavity is provided with a limiting surface for preventing the insert from being connected with the core too far.

7. The new structure of the mold core for injection molding of pipe fittings with inserts according to claim 1, characterized in that the peripheral surface of the insert is provided with a first annular groove and a second annular groove for preventing the insert from falling off, and the end surface of the insert is provided with a plurality of protrusions for preventing the insert from rotating with the injection molding of pipe fittings.

8. The new structure of the mold core for injection molding of pipe fittings with inserts as claimed in claim 7, wherein the number of said protrusions is eight, each being circumferentially uniformly distributed.