CN201702905U

CN201702905U - Pipe fitting mold for positioning mold core conical surface

Info

Publication number: CN201702905U
Application number: CN2010202986811U
Authority: CN
Inventors: 王海强; 刘志钢; 吴慧珍
Original assignee: Huachuang Tianyuan Industrial Developing Co Ltd
Current assignee: Huachuang Tianyuan Industrial Developing Co Ltd
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-01-12
Anticipated expiration: 2020-08-20

Abstract

The utility model provides a pipe fitting mold for positioning a mold core conical surface, which has higher positioning precision and longer service life for positioning the mold core conical surface. The pipe fitting mold comprises a first mold core, a second mold core, a first pipe end mold insert, a second pipe end mold insert, a moving mold cavity, a first stopping ring, a second stopping ring and a fixed mold cavity, wherein the first mold core is matched with the first pipe end mold insert by adopting a conical surface; and the second mold core is matched with the second pipe end mold insert by adopting a conical surface. By adopting a mode of changing the matched part of the mold core and the pipe end mold insert, the cylindrical surface matching is changed into the conical surface matching, so that the utility model ensures that the mold core can be automatically guided when being filled along the opposite directions of M and N and improves the positioning precision; and the utility model can ensure that the wearing capacity of the mold core and the pipe end mold insert when the mold core is drawn along the M and N directions can be reduced, the dimensional precision of a positioning structure of the mold core in the use process can be ensured, and thereby the service life of the mold core and the pipe end mold inserts can be prolonged.

Description

The pipe fitting mold of core conical surface location

Technical field

The utility model relates to a kind of pipe fitting mold of core conical surface location structure, belongs to the mold machining technology field.

Background technology

In plastic duct system, pipe fitting substantially all is to utilize mould to carry out injection-compression molding, can guarantee production efficiency and constant product quality simultaneously.For most pipe fitting moulds (such as threeway, elbow), its core adopts the root location more, is the cantilever beam form.Its stability will lean on the core and reasonable cooperation of pipe end mold insert localization part to guarantee.And the core locating surface of present most pipe fitting moulds all adopts face of cylinder A, B(to see Fig. 2), the face of cylinder is engaged in mould and uses the initial stage no problem, but along with frequently in the production process take out, the lock pin action, the wear extent of core and dynamic model side pipe end mold insert locating surface is bigger, causes the mating surface gap of localization part to become big.The relative position of core and die cavity just is difficult to guarantee that promptly in injection process, core is easy to be partial to the dynamic model side like this, and bigger deviation appears in the product wall thickness, causes the appearance of substandard product.

Summary of the invention

The technical problem that the utility model solves is: change existing core cooperates the location with the pipe end mold insert face of cylinder form, the locate mode that adopts taper seat to cooperate improves the accuracy and the stability of core location, thereby guarantees the stability of product quality.

Technical solution of the present utility model is: the pipe fitting mold of core conical surface location, comprise first core, second core, the first pipe end mold insert, the second pipe end mold insert, dynamic model die cavity, the first retaining ring, the second retaining ring and cover half die cavity, first core adopts taper seat to cooperate with the first pipe end mold insert, and second core adopts taper seat to cooperate with the second pipe end mold insert.

The localization part of described first core and second core is 3 ° ± 5 ＇ male cone (strobilus masculinus)s, and the conical surface axle center and first core and the second core axle center axiality are not more than φ 0.05.

The localization part of the described first pipe end mold insert and the second pipe end mold insert is 3 ° ± 5 ＇ inner conical surfaces, and the die cavity axle center axiality that conical surface axle center and dynamic model die cavity and plastic product are formed is not more than φ 0.05.

Described first core, second core cooperate with the first pipe end mold insert, the second pipe end mold insert put in place after, the axiality in the die cavity axle center that the axle center of first core, second core and dynamic model die cavity and plastic product are formed is not more than φ 0.1.

The utility model compared with prior art beneficial effect is:

(1) the utility model adopts cone match between core and the pipe end mold insert, making when core is inserted can automatic guiding, when extracting out, can reduce the wear extent of pipe end mold insert mating surface, obviously improve product quality stability, and prolong the service life that cooperates localization part to a great extent;

(2) the utility model adopts cone match between core and the pipe end mold insert, improves the degree of accuracy and the stability of mould molding positioning parts structure;

(3) the utility model only needs to have now pipe end mold insert and core mating surface and is processed into the conical surface and can realizes conical surface location, and other mold component there is no big change.

Description of drawings

Fig. 1 is the utility model core conical surface location structure schematic diagram;

Fig. 2 is an existing mold core face of cylinder location structure schematic diagram.

The specific embodiment

The utility model as shown in Figure 1, comprise first core 1, second core 2, the first pipe end mold insert 3, the second pipe end mold insert 4, dynamic model die cavity 5, the first retaining ring 6, the second retaining ring 7 and cover half die cavity 9, first core 1 adopts taper seat to cooperate with the first pipe end mold insert 3, and second core 2 adopts taper seat to cooperate with the second pipe end mold insert 4.

The face of cylinder of existing mold cooperated become taper seat and cooperate, make the core 1 of winning, second core 2 can automatic guiding when M, N insert in the other direction, improve setting accuracy; First core 1, second core 2 reduce the wear extent with the first pipe end mold insert 3, the second pipe end mold insert 4 along M, when the N direction is extracted out, guarantee the location structure dimensional accuracy in use of mould first core 1, second core 2, thereby prolong the service life of mould first core 1, second core 2 and the first pipe end mold insert 3, the second pipe end mold insert 4.

First core 1 and second core 2 are joined with the first pipe end mold insert 3 and the second pipe end mold insert 4 and are made the α tapering, form cone match location (cooperation put in place the axiality in core 1,2 axle center, back and die cavity axle center be not more than φ 0.1).

The localization part processing α of first core 1 and second core 2 is the male cone (strobilus masculinus) of 3 ° ± 5 ＇, and the conical surface axle center and first core 1 and second core, 2 axle center axialities are not more than φ 0.05.

The localization part processing α of the first pipe end mold insert 3 and the second pipe end mold insert 4 is the inner conical surface of 3 ° ± 5 ＇, and conical surface axle center and dynamic model die cavity 5 are not more than φ 0.05 with the die cavity axle center axiality that plastic product 8 is formed.

First core 1, second core 2 cooperate with the first pipe end mold insert 3, the second pipe end mold insert 4 put in place after, the axle center of first core 1, second core 2 and dynamic model die cavity 5 is not more than φ 0.1 with the axiality in the die cavity axle center that plastic product 8 is formed.

The utility model operation principle:

5 die sinkings of dynamic model die cavity, when core 1,2 is extracted out along M, N direction, H(center height) constant, the wear extent of 3 ° of conical surfaces of core 1,2 and pipe end mold insert 3,4 is quite little, the precision that can keep cone match for a long time, the service life of prolongation mold cores location structure; Core 1,2 is when M, N insert in the other direction, and H is constant, and core 1,2 can improve the degree of accuracy of core position along 3 ° of conical surface automatic guidings of pipe end mold insert 3,4, improves product quality; Fill out core put in place the back (3 ° of conical surfaces are adjacent to), H is constant, and dynamic model 5 matched moulds put in place, and retaining ring 6,7 and core 1,2 back stop slots are adjacent near end one skew back face, core 1,2 end planes keep gap 0.05-0.1mm, afterbody Flange Plane and pipe end mold insert 3,4 outside plane clearance 0.1-0.2mm.So, along P when the injection of plastic fluid, core can because of stressed along P to occurring tilting, the wall thickness e of pipe fitting product 8 big deviation can not occur yet.

Claims

1. the pipe fitting mold of core conical surface location, comprise first core (1), second core (2), the first pipe end mold insert (3), the second pipe end mold insert (4), dynamic model die cavity (5), the first retaining ring (6), the second retaining ring (7) and cover half die cavity (9), it is characterized in that: first core (1) adopts taper seat to cooperate with the first pipe end mold insert (3), and second core (2) adopts taper seat to cooperate with the second pipe end mold insert (4).

2. the pipe fitting mold of the core conical surface according to claim 1 location, it is characterized in that: the localization part of described first core (1) and second core (2) is 3 ° ± 5 ＇ male cone (strobilus masculinus)s, and conical surface axle center and first core (1) and second core (2) axle center axiality are not more than φ 0.05.

3. the pipe fitting mold of the core conical surface according to claim 1 location, it is characterized in that: the localization part of the described first pipe end mold insert (3) and the second pipe end mold insert (4) is 3 ° ± 5 ＇ inner conical surfaces, and conical surface axle center and dynamic model die cavity (5) are not more than φ 0.05 with the die cavity axle center axiality that plastic product (8) is formed.

4. the pipe fitting mold of the core conical surface according to claim 1 location, it is characterized in that: described first core (1), second core (2) cooperate with the first pipe end mold insert (3), the second pipe end mold insert (4) put in place after, the axiality in the die cavity axle center that the axle center of first core (1), second core (2) and dynamic model die cavity (5) and plastic product (8) are formed is not more than φ 0.1.