CN111890638B

CN111890638B - Pipe fitting injection mold

Info

Publication number: CN111890638B
Application number: CN202010843008.XA
Authority: CN
Inventors: 万海龙
Original assignee: Dongguan City Zaihao Packaging Products Co ltd
Current assignee: Dongguan City Zaihao Packaging Products Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-06-14
Anticipated expiration: 2040-08-20
Also published as: CN111890638A

Abstract

The invention discloses a pipe fitting injection mold, which comprises: the fixed die is characterized in that a tubular groove is formed in the middle of the upper portion of the fixed die, fixing rods are symmetrically arranged on two sides of the tubular groove, and the fixing rods are vertically arranged and fixedly connected with the fixed die; the movable die is composed of two arc-shaped plates with semicircular cross sections, the two arc-shaped plates jointly form a tube cavity, the inner diameters of the tube cavity and the tubular groove are the same, a forming cavity for forming a pipe fitting is jointly formed, and a fixing groove for matching with a fixing rod is formed in each arc-shaped plate; wherein, a pair of heating chamber has been seted up to the symmetry in the dead lever, two the pressure chamber has all been seted up in the dead lever, the pressure chamber communicates with corresponding heating chamber, and all fills there is expanding material. According to the die, the movable die is in close contact with the movable die by utilizing the high temperature of the material to form the sealed forming cavity, and an additional fixing piece is not required to be used for reinforcing the injection molding cavity, so that the die is convenient for a user to assemble, and the working efficiency of the user is improved.

Description

Pipe fitting injection mold

Technical Field

The invention belongs to the technical field of injection molds, and particularly relates to a pipe fitting injection mold.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. The injection mold for pipe fittings generally comprises a fixed mold and a movable mold, wherein the movable mold is tightly installed on the fixed mold and forms a tubular molding cavity together with the fixed mold, high-temperature raw materials are injected into the molding cavity when the injection mold is used, and after the injection mold is cooled and molded, the movable mold is detached to take out the molded pipe fittings.

In order to make the leakproofness between movable mould and the cover half better, need adopt a plurality of mountings during the installation with movable mould and cover half zonulae occludens, because the user need install these mountings before moulding plastics to and after the pipe fitting cooling shaping, need dismantle these mountings earlier and just can take out the pipe fitting, consequently bring inconvenience for user's loading and unloading mould, and then reduced operating personnel's work efficiency.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides an injection mold for a pipe fitting.

The invention provides a pipe fitting injection mold, which comprises:

the fixing device comprises a fixed die, a fixed die and a fixing rod, wherein a tubular groove is formed in the middle above the fixed die, fixing rods are symmetrically arranged on two sides of the tubular groove, and the fixing rods are vertically arranged and fixedly connected with the fixed die;

the movable die is composed of two arc-shaped plates with semicircular cross sections, the two arc-shaped plates jointly form a tube cavity, the inner diameters of the tube cavity and the tubular groove are the same, a forming cavity for forming a pipe fitting is jointly formed, and a fixing groove for matching with a fixing rod is formed in each arc-shaped plate;

wherein, a pair of heating chamber has been seted up to the symmetry in the cover half, two the pressure chamber has all been seted up in the dead lever, pressure chamber and corresponding heating chamber intercommunication, and all filled the inflation material, the dead lever is close to one side of shaping chamber and sets up the extrusion groove with the pressure chamber intercommunication, sealed the sliding is provided with the extrusion piece in the extrusion groove.

Preferably, the inside extrusion chamber of having seted up of extrusion piece, the extrusion intracavity is equipped with the stripper rod perpendicularly, the sealed extrusion piece of wearing out of upper end of stripper rod, the extrusion piece is worn out in the non-sealed play of lower extreme, and both ends and fixed slot lateral wall contact, an organic whole is equipped with the lug in the stripper rod, the lug all seals with the stripper rod and slides and set up in the extrusion chamber, states the one side that the extrusion piece is close to the pressure chamber and offers the through-hole with the intercommunication of extrusion chamber upper end.

Preferably, the two ends of the extrusion rod are integrally provided with clamping ends, and the side wall of the fixing groove is provided with a clamping groove for clamping the clamping ends.

Preferably, the lower end of the arc-shaped plate is integrally provided with a positioning block, and the fixed die is provided with a positioning groove used for being matched with the positioning block.

Preferably, the expansion medium is paraffin.

Preferably, a rotating groove is formed in one side, away from the molding cavity, of the fixing rod, a rotating wheel is rotatably mounted in the rotating groove, and an elastic sleeve is sleeved on the outer side of the rotating wheel.

Compared with the prior art, the invention has the beneficial effects that:

1. the movable dies are in close contact with each other by utilizing the high temperature of the materials in the die to form a sealed forming cavity, the injection molding cavity is not required to be reinforced by using an additional fixing piece, the die is convenient for a user to assemble, the working efficiency of the user is improved, meanwhile, after the pipe fitting is cooled and formed, the integral temperature of the die is reduced, the expansion medium is contracted at the moment, the acting force of mutual extrusion between the two arc-shaped plates disappears, and the movable dies are convenient to disassemble by the user;

2. through setting up the rotation wheel that has the elastic sleeve, after the extrusion effect disappears, the arc can reset under the elastic action of elastic sleeve, and two arcs have the motion trend of keeping away from each other promptly, and further convenient to use person lifts off the arc, and the setting of rotation wheel can reduce the frictional force between fixed slot lateral wall and the dead lever.

Drawings

FIG. 1 is a schematic structural view of a front cross-section of an injection mold for pipe fittings according to the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

fig. 4 is a schematic top view of an injection mold for pipe fittings according to the present invention.

In the figure: the extrusion die comprises a fixed die 1, a forming cavity 2, an arc-shaped plate 3, a fixing groove 4, a fixing rod 5, a pressure cavity 6, a heating cavity 7, a positioning groove 8, a positioning block 9, an extrusion groove 10, an extrusion block 11, an extrusion rod 12, a clamping end 13, a through hole 14, a convex block 15, an extrusion cavity 16, a rotating wheel 17 and an elastic sleeve 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 4, a pipe injection mold includes:

the fixed die comprises a fixed die 1, wherein a tubular groove is formed in the middle of the upper portion of the fixed die 1, fixing rods 5 are symmetrically arranged on two sides of the tubular groove, and the fixing rods 5 are vertically arranged and fixedly connected with the fixed die 1;

the movable die comprises two arc-shaped plates 3 with semicircular cross sections, the two arc-shaped plates 3 jointly form a tube cavity, the inner diameters of the tube cavity and the tubular groove are the same, a forming cavity 2 for forming a pipe fitting is jointly formed, and a fixing groove 4 for matching with a fixing rod 5 is formed in each arc-shaped plate 3;

the fixed die 1 is symmetrically provided with a pair of heating cavities 7, two fixing rods 5 are respectively provided with a pressure cavity 6, the pressure cavities 6 are communicated with the corresponding heating cavities 7 and are respectively filled with expansion substances, one side of each fixing rod 5, which is close to the forming cavity 2, is provided with an extrusion groove 10 communicated with the pressure cavity 6, and an extrusion block 11 is arranged in each extrusion groove 10 in a sealing sliding manner;

in the embodiment applying the technical scheme, a user installs the movable mold above the fixed mold 1 before injection molding, specifically, the fixed rod 5 on the fixed mold 1 is inserted into the fixed groove 4 of the arc-shaped plates 3, at this time, the two arc-shaped plates 3 together enclose a tube cavity, the tube cavity and the tubular groove on the fixed mold 1 form the molding cavity 2, and then the user can directly inject high-temperature raw materials into the molding cavity 2; in the process, high-temperature raw materials firstly enter the tubular groove, an expansion medium in the heating cavity 7 absorbs heat to expand, so that the pressure intensity in the heating cavity 7 and the pressure cavity 6 is increased, the extrusion block 11 is pushed to move towards one side close to the forming cavity 2, the extrusion block 11 is in abutting contact with the side wall of the fixed groove 4, and the two arc-shaped plates 3 have a movement trend of being close to each other, so that the end faces of the two arc-shaped plates 3 are in close contact, and the sealing cavity has good sealing performance; utilize the high temperature of material to make the movable mould in close contact with in this mould, form sealed one-tenth die cavity 2, need not use extra mounting to consolidate at the chamber of moulding plastics, convenient to use person assembling die has improved user's work efficiency, simultaneously after pipe fitting cooling shaping, the whole temperature of mould descends, the expansion medium shrink this moment, mutual extruded effort disappears between two arcs 3, and then the movable mould is dismantled to convenient to use person.

According to the preferable technical scheme in the embodiment, the lower end of the arc-shaped plate 3 is integrally provided with the positioning block 9, the fixed die 1 is provided with the positioning groove 8 used for being matched with the positioning block 9, when the movable die is installed, the positioning block 9 on the arc-shaped plate 3 is clamped in the positioning groove 8, and the positioning block 9 is matched with the positioning groove 8, so that the radial stress of the fixing rod 5 is greatly reduced;

according to the preferable technical scheme in the embodiment, an extrusion cavity 16 is formed in an extrusion block 11, an extrusion rod 12 is vertically arranged in the extrusion cavity 16, the upper end of the extrusion rod 12 penetrates through the extrusion block 11 in a sealing manner, the lower end of the extrusion rod 12 penetrates through the extrusion block 11 in a non-sealing manner, two ends of the extrusion rod are in contact with the side wall of the fixing groove 4, a bump 15 is integrally arranged in the extrusion rod 12, the bump 15 and the extrusion rod 12 are both arranged in the extrusion cavity 16 in a sealing and sliding manner, namely the bump 15 is matched with the extrusion rod 12 to divide the extrusion cavity 16 into an upper part and a lower part which are independent, and a through hole 14 communicated with the upper end of the extrusion cavity 16 is formed in one side, close to the pressure cavity 6, of the extrusion block 11; when the expansion medium of the pressure cavity 6 expands to push the extrusion block 11 to extrude the side wall of the fixed groove 4, part of the expansion medium enters the extrusion cavity 16 through the through hole 14 and further extrudes the bump 15 downwards, so that the extrusion rod 12 has a downward movement trend, the end part of the extrusion rod 12 is in close contact with the side wall of the fixed groove 4, the arc-shaped plate 3 integrally has a downward movement trend, the lower end surface of the arc-shaped plate 3 is in close contact with the fixed die 1, and the movable die and the fixed die 1 are in sealed connection; further preferred technical scheme, the both ends an organic whole of pressure ram 12 is equipped with joint end 13, offers the draw-in groove that is used for the card to establish joint end 13 on the lateral wall of fixed slot 4, supports the in-process of 4 lateral walls of fixed slot at extrusion piece 11, and the joint end 13 of pressure ram 12 can block simultaneously and establish in fixed slot 4, and then the pressure ram 12 of being convenient for will be better with decurrent motion trend transmits for arc 3.

In the preferred technical scheme in this embodiment, the expansion medium is paraffin, and paraffin is in a liquid state at high temperature, and compared with a gaseous expansion medium, the expansion medium is not easily compressed, so that the extrusion effect is better, and the paraffin is in a stable state.

According to the preferable technical scheme in the embodiment, a rotating groove is formed in one side, away from the forming cavity 2, of the fixing rod 5, a rotating wheel 17 is rotatably mounted in the rotating groove, and an elastic sleeve 18 is sleeved on the outer side of the rotating wheel 17; two arcs 3 have the motion trend that is close to each other in the use, and elastic sleeve 18 can receive the extrusion of the 4 lateral walls of fixed slot to a certain extent this moment, and after extrusion effect disappeared, arc 3 can reset under elastic action of elastic sleeve 18, and two arcs 3 have the motion trend of keeping away from each other promptly, and further convenient to use person unloads arc 3, and the setting of rotating wheel 17 can reduce the frictional force between 4 lateral walls of fixed slot and dead lever 5.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A pipe injection mold, comprising: the fixed die comprises a fixed die (1), wherein a tubular groove is formed in the middle of the upper part of the fixed die (1), fixing rods (5) are symmetrically arranged on two sides of the tubular groove, and the fixing rods (5) are vertically arranged and fixedly connected with the fixed die (1); the movable die comprises two arc-shaped plates (3) with semicircular cross sections, the two arc-shaped plates (3) jointly form a tube cavity, the inner diameter of the tube cavity is the same as that of the tubular groove, a forming cavity (2) for forming the pipe fitting is jointly formed, and a fixing groove (4) for being matched with a fixing rod (5) is formed in each arc-shaped plate (3); the fixed die comprises a fixed die (1), a pair of heating cavities (7) and two fixing rods (5), wherein the fixed die (1) is symmetrically provided with a pair of heating cavities (7), the two fixing rods (5) are respectively provided with a pressure cavity (6), the pressure cavities (6) are communicated with the corresponding heating cavities (7) and are respectively filled with an expansion substance, one side of each fixing rod (5) close to a forming cavity (2) is provided with an extrusion groove (10) communicated with the pressure cavity (6), and an extrusion block (11) is arranged in each extrusion groove (10) in a sealing and sliding manner; an extrusion cavity (16) is formed in the extrusion block (11), an extrusion rod (12) is vertically arranged in the extrusion cavity (16), the upper end of the extrusion rod (12) penetrates out of the extrusion block (11) in a sealing mode, the lower end of the extrusion rod (12) penetrates out of the extrusion block (11) in a non-sealing mode, two ends of the extrusion rod are in contact with the side wall of the fixing groove (4), a convex block (15) is integrally arranged in the extrusion rod (12), the convex block (15) and the extrusion rod (12) are both arranged in the extrusion cavity (16) in a sealing sliding mode, and a through hole (14) communicated with the upper end of the extrusion cavity (16) is formed in one side, close to the pressure cavity (6), of the extrusion block (11); clamping ends (13) are integrally arranged at two ends of the extrusion rod (12), and clamping grooves for clamping the clamping ends (13) are formed in the side walls of the fixing grooves (4); a positioning block (9) is integrally arranged at the lower end of the arc-shaped plate (3), and a positioning groove (8) used for being matched with the positioning block (9) is formed in the fixed die (1); the swelling substance is paraffin; the fixed rod (5) is far away from one side of the molding cavity (2) and is provided with a rotating groove, a rotating wheel (17) is installed in the rotating groove in a rotating mode, and an elastic sleeve (18) is sleeved on the outer side of the rotating wheel (17).