CN210233852U - A mould for making pipe joint goes into pearl - Google Patents

Abstract

The utility model discloses a mould for making conduit coupling income pearl, including mould main part and its inside die cavity, the die cavity includes the first end that is used for forming the protruding conduit coupling end of income pearl, the mould main part includes first mould and second mould, be provided with first axle core and second axle core coaxially and relatively on first mould and the second mould, first axle core and second axle core correspond first end department radial dimension and reduce gradually; taking any point on the inner surface of the first end, setting the height of the first shaft core or the second shaft core corresponding to the point from the axis of the die body as h1, setting the outer diameter of the point as d2, setting the outer diameter of the horizontal position of the first shaft core or the second shaft core as d1, setting the shrinkage of the pouring material as S, and enabling the relation between h1 and d1, d2 and S to satisfy the following conditions: h1 is less than or equal to (d1-Sd2)/2 (1-S). An object of the utility model is to provide a mould that is used for making pipe joint income pearl that machining precision is higher.

Description

A mould for making pipe joint goes into pearl

Technical Field

The utility model relates to a mould for making pipe joint income pearl.

Background

In the manufacturing processes of semiconductor manufacturing, medical and pharmaceutical product manufacturing, food processing and industrial fields, various fluids (such as high-purity chemical liquid, high-purity chemical reagent and the like) are required to be used, and the fluids are necessarily conveyed through a conduit in machine equipment, and conduit joints are required to be connected between conduits and equipment.

At present, in the prior art, some of the catheter connectors include a connector main body, a ball and a nut, when the catheter connector is used, the catheter is sleeved at one end of the ball, the other end of the ball is connected with the connector main body, and finally the catheter and the ball are further fastened to the connector main body by the nut. The connector body, the bead and the nut are all formed by injection molding, and special molds are needed to produce all parts of the conduit connector in order to enable the finished product to have higher dimensional accuracy and better sealing performance.

In the prior art, the interior of the bead is provided with a hollow flow channel, and the part of the mold corresponding to the flow channel is also arranged into a vertical cylinder, so that the whole flow channel is kept flat. But pouring material shaping again, often can receive the influence of material shrinkage, the product can take place the condition of shrinking, according to the different thickness of income pearl different positions department, its degree of shrinking that corresponds is also different, this just makes into pearl final molding back, produces the recess at runner internal plane easily for whole becomes the unevenness, influences fluidic mobility.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art existence, the utility model aims to provide a mould that is used for making pipe joint income pearl that machining precision is higher.

In order to achieve the above purpose, the utility model provides a following technical scheme: a mould for manufacturing a conduit joint inlet bead comprises a mould main body and a cavity inside the mould main body, wherein the cavity comprises a first end used for forming a conduit connecting end protruding into the bead, the mould main body comprises a first mould and a second mould, a first shaft core and a second shaft core are coaxially and oppositely arranged on the first mould and the second mould, the radial sizes of the first shaft core and the second shaft core corresponding to the first end are gradually reduced, and the first shaft core and the second shaft core are arranged in a mode of abutting against the two end faces of the first shaft core and the second shaft core; taking any point on the inner surface of the first end, setting the height of the first shaft core or the second shaft core corresponding to the point from the axis of the die body as h1, setting the outer diameter of the point as d2, setting the outer diameter of the horizontal position of the first shaft core or the second shaft core as d1, setting the shrinkage of the pouring material as S, and enabling the relation between h1 and d1, d2 and S to satisfy the following conditions: h1 is less than or equal to (Sd2-d2+2d1)/2(1+ S).

The utility model discloses further set up to: and a horizontal end surface is arranged at the position with the largest radial dimension of the inner surface of the first end.

The utility model discloses further set up to: the axial length of the horizontal end face is set to be 0.1mm-5 mm.

The utility model discloses further set up to: the area of the end face of the first shaft core is larger than, smaller than or equal to that of the end face of the second shaft core.

The utility model discloses further set up to: the first and second dies are sealingly engaged or disengaged where the radial dimension of the inner surface of the first end is greatest.

The utility model discloses further set up to: the inner surface of the first end comprises a first surface and a second surface, the included angle between a tangent plane of any point on the first surface and a horizontal plane is theta, and the reciprocal of the tangent value of the included angle theta is smaller than the friction coefficient mu between the second end surface and the catheter, namely mu is larger than 1/tan theta.

The utility model is further arranged that the included angle between the tangent plane of any point on the second surface and the horizontal plane is α, and the α satisfies that the angle is more than 10 degrees and less than α and less than 60 degrees.

The utility model discloses further set up to: the first surface and the second surface are both provided as slopes.

The utility model discloses further set up to: the first surface and the second surface are both provided with cambered surfaces.

The utility model discloses further set up to: and a pouring opening communicated with the cavity is formed in the surface of the mold.

Through adopting above-mentioned technical scheme, the utility model relates to a mould for making pipe joint income pearl compares prior art, and the advantage that has lies in: the runner is not sunken in can guaranteeing the pearl income of shaping product, has guaranteed the planarization of runner. Meanwhile, the condition that burrs are generated on the edge of the runner opening due to friction force during demolding can be avoided by adopting the double-core die-drawing mode. The beads for different working conditions and purposes are further and carefully distinguished, so that the beads produced by the die can have different effects correspondingly.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural view of a first embodiment of the mold of the present invention;

FIG. 2 is a schematic diagram showing dimensions of a mold according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a second embodiment of the mold of the present invention;

fig. 4 is a schematic structural view of a third embodiment of the mold of the present invention;

fig. 5 is a schematic structural view of a fourth embodiment of the mold of the present invention;

fig. 6 is a schematic structural diagram of a fifth embodiment of the present invention;

FIG. 7 is a schematic view of a bead produced by a mold according to an embodiment;

FIG. 8 is a schematic structural view of beads produced by a six-die of an example;

FIG. 9 is a schematic illustration of the structure of beads produced by the four molds of the example;

FIG. 10 is a schematic view of the bead-in structure produced by the five molds of the example.

In the figure: 1. a first mold; 2. a second mold; 3. a first end; 4. a first shaft core; 5. a second shaft core; 6. a horizontal end face; 7. a first surface; 8. a second surface; 9. and (6) pouring a port.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

An embodiment of a mold for manufacturing a catheter hub insert according to the present invention will be further described with reference to fig. 1 to 10.

The first embodiment is as follows:

the mold for manufacturing the conduit joint inlet bead as shown in fig. 1, 2 and 7 comprises a mold main body and a cavity inside the mold main body, wherein the overall shape of the cavity is the shape of the inlet bead, and the cavity comprises a first end 3 for forming a conduit connecting end protruding from the inlet bead. In the present embodiment, the mold main body includes a first mold 1 and a second mold 2, a first shaft core 4 and a second shaft core 5 having the same bottom size are coaxially and oppositely disposed on the first mold 1 and the second mold 2, the radial sizes of the first shaft core 4 and the second shaft core 5 are gradually reduced corresponding to the first end 3, and the first shaft core 4 and the second shaft core 5 are disposed to be abutted at both end surfaces thereof. The arrangement that first axle core 4 and second axle core 5 contradict for form into the inside continuous runner of pearl after pouring, to the limited of first axle core 4 and second axle core 5 size here, guaranteed the uniformity of income pearl interior runner size in the big direction of following, can not one end size big, other end size is little or some other circumstances. In this embodiment, the end faces of the first shaft core 4 and the second shaft core 5 have the same size and are both set to be circular, so that the channel for putting the finished product into the bead is a cylindrical channel, and the surfaces of the channel at the corresponding positions of the first shaft core 4 and the second shaft core 5 are smooth, so that the fluid can flow smoothly. The setting of two axle centers here can be when the drawing die, extracts respectively from the both sides of going into the pearl, makes the product go into the edge of the runner both sides of pearl all more level and more smooth, can not produce deckle edge, and the drawing die of unilateral has the runner edge of one side all the time to produce deckle edge. Further, the first and second molds 1 and 2 are sealingly engaged or disengaged at the maximum radial dimension of the inner surface of the first end 3. The position with the largest size is used as a die parting point, so that the product can be conveniently demoulded. In this embodiment, the cavity inside the mold is further connected with a pouring port 9, and the pouring port 9 is communicated to the outer surface of the mold, so that pouring of materials poured when the mold is closed is facilitated.

Taking a point A at the inner surface of the first end 3 of the cavity, setting the height of the first shaft core 4 or the second shaft core 5 corresponding to the point from the axis of the mold as h1, setting the outer diameter of the point A as d2, setting the outer diameter of the first shaft core 4 or the second shaft core 5 at the level as d1 (namely the size of the opening of the runner of the finished product bead), setting the shrinkage rate of the casting material as S, further setting the vertical height of the point A corresponding to the opening of the runner of the bead as h2, setting the height of the bead which is reduced when the bead is deformed and shrunk as h3, wherein the relations between h1 and d1, d2 and S are satisfied: h1 is less than or equal to (Sd2-d2+2d1)/2(1+ S). According to the calculation formula of the shrinkage, the ratio S is (D-M)/Dx100%, wherein D is the size of the mold, and M is the size of the plastic part, and the relation I is obtained: (h2+ h3-2h3)/(h2+ h3) ═ S. Here, twice as much h3 is needed to be subtracted from the actual size of the plastic part because shrinkage occurs when the ball enters the outer wall and the inner wall at the point A, so twice as much h3 is needed. The relationships between h1, h2, h3, d1 and d2 are readily found from the geometric relationships according to fig. 2, relationship two: 2h1+2h2+2h3 ═ d 2; relationship three: 2h1+2h3 ═ d 1; the relationship is four: d1+2h2 ═ d 2. In order to ensure that the surface of the finally formed bead-entering flow channel is not recessed, h1 must satisfy (Sd2-d2+2d1)/2(1+ S) as simplified by the relation one to the relation four. In the first embodiment, in order to ensure that the edge of the channel for putting the final finished product into the bead is linear, h1 (Sd2-d2+2d1)/2(1+ S) is selected;

the inner surface of the first end 3 is further provided with a first surface 7 and a second surface 8, the first surface 7 and the second surface 8 are provided with inclined planes, the inclined planes ensure that the position corresponding to the formed insert is also an inclined plane, a larger contact area between the insert and the conduit is ensured, so that the conduit is not easy to be separated from the insert, meanwhile, a horizontal end surface 6 is connected between the first surface 7 and the second surface 8, the width of the horizontal end surface 6 is set to be 1mm, the arrangement of the horizontal end surface 6 ensures that the finished insert has a horizontal end surface when the finished insert is used, so that the conduit connecting end has a certain protection effect after the conduit is sleeved outside the insert when the conduit is used, compared with the insert produced without the horizontal end surface 6, the conduit is bent more gently, so that the sealing performance and the service life of the conduit are increased to a certain extent, the angle of the first surface 7 is further recorded as theta is equal to theta, the inverse value of the angle of the theta is set to be smaller than the last insert when the insert is used, the insert is equal to be equal to the tangent of the angle of the tangent of the bead x, namely equal to be equal to or greater than the tangent angle of the tangent of the insert, so that the bead x, the angle of the tangent of the insert, so that the bead is equal to be equal to or greater than equal to be equal to or equal to be equal to or equal to be equal to or greater than equal to or greater than equal to be equal to or equal to be equal to less than equal to or equal to less than equal to be equal to.

Example two:

the mold for making the bead of the catheter adapter shown in fig. 3 is different from the first embodiment in that: between the first surface 7 and the second surface 8, no horizontal connection ends are provided, and the rest of the arrangements are the same. The bead insert molded by using the mold of the second embodiment has a sharp corner at the position where the conduit connection end of the bead insert protrudes, which only has a certain influence on the practical life of the conduit, compared with the first embodiment, but the second embodiment is used in some specific working conditions (for example, the bead insert has a short service life and a high pressure needs to be ensured in a short time).

Example three:

the mold for making the catheter adapter insert shown in fig. 4 is different from the first embodiment in that: the first surface 7 and the second surface 8 are both provided as arc surfaces, and the rest of the arrangement is the same. The front and back surfaces of the convex position of the conduit connecting end of the bead are both provided with cambered surfaces by using the bead-entering die formed in the third embodiment. Functionally, the actual use of the beads is not affected, the arc surface has less damage to the catheter, but the possibility of the catheter falling off is increased compared with the inclined surface, so that the embodiment is not suitable for working conditions with higher pressure and longer application period.

Example four:

the mold for making the conduit fitting insert shown in fig. 5 and 9, example four is different from example one in that: the end faces of the first shaft core 4 and the second shaft core 5 are different in size, and more specifically, the end faces of the first shaft core 4 and the second shaft core 5 are each provided as a circular face, but the diameter size of the end face of the first shaft core 4 is smaller than the diameter size of the end face of the second shaft core 5. This arrangement results in the final formed in-bead flow channel being shaped as in figure 9. In fig. 9, the flow channel inside the bead generates a bulge with an end surface, when fluid flows through the bulge, a pressure is generated on the bulge due to the impulsive force of the fluid, when the fluid flows from left to right, the pressure can be transmitted to the position where the nut and the conduit are screwed to abut against, namely, the sealing pressure at the position is increased, and the sealing effect is improved; when fluid flows from right to left, the impulsive force of the fluid can be transmitted to the embedding part at the left end of the entering bead, and the sealing effect of the whole entering bead can be improved by utilizing the impulsive force of the fluid.

Example five:

the mold for making the conduit fitting insert shown in fig. 6 and 10, example five is different from example four only in that the diameter dimension of the end face of the first shaft core 4 is larger than that of the end face of the second shaft core 5. The arrangement results in the shape of the finally formed bead-in flow channel, that is, the shape in fig. 10 is formed, and the bead-in structure of the shape can also utilize the impulsive force of the fluid to enhance the sealing effect of different parts of the bead-in flow channel (refer to the fourth embodiment in specific principle).

Example six:

fig. 8 shows a specific structure of a bead molded by using the mold of the sixth embodiment, which is different from the first embodiment in that: in the present embodiment, h1 ═ (Sd2-d2+2d1)/2(1+ S) is selected. This arrangement allows the bead to be shaped and shrunk so that the interior of the flow channel is convex, unlike the fourth and fifth embodiments, which is smooth. The position of the protrusion can have the same effect as that of the fourth embodiment and the fifth embodiment, but the smooth protrusion can make the fluid flow in the flow passage smoother than that of the fourth embodiment and the fifth embodiment.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (10)

1. The utility model provides a mould for making pipe joint goes into pearl, includes mould main part and its inside die cavity, the die cavity includes the first end that is used for forming into the convex pipe connection end of pearl, its characterized in that: the die main body comprises a first die and a second die, a first shaft core and a second shaft core are coaxially and oppositely arranged on the first die and the second die, the radial sizes of the first shaft core and the second shaft core corresponding to the first end are gradually reduced, and the first shaft core and the second shaft core are arranged in an abutting mode at the two end faces of the first shaft core and the second shaft core; taking any point on the inner surface of the first end, setting the height of the first shaft core or the second shaft core corresponding to the point from the axis of the die body as h1, setting the outer diameter of the point as d2, setting the outer diameter of the horizontal position of the first shaft core or the second shaft core as d1, setting the shrinkage of the pouring material as S, and enabling the relation between h1 and d1, d2 and S to satisfy the following conditions: h1 is less than or equal to (Sd2-d2+2d1)/2(1+ S).

2. The mold of claim 1, wherein: and a horizontal end surface is arranged at the position with the largest radial dimension of the inner surface of the first end.

3. The mold of claim 2, wherein: the axial length of the horizontal end face is set to be 0.1mm-5 mm.

4. The mold according to claim 1 or 2, characterized in that: the area of the end face of the first shaft core is larger than, smaller than or equal to that of the end face of the second shaft core.

5. The mold of claim 1, wherein: the first and second dies are sealingly engaged or disengaged where the radial dimension of the inner surface of the first end is greatest.

6. The mold of claim 1, wherein: the inner surface of the first end comprises a first surface and a second surface, the included angle between a tangent plane of any point on the first surface and a horizontal plane is theta, and the reciprocal of the tangent value of the included angle theta is smaller than the friction coefficient mu between the second end surface and the catheter, namely mu is larger than 1/tan theta.

7. The mold of claim 6, wherein the angle between the tangent plane of any point on the second surface and the horizontal plane is α, and the angle α satisfies 10 ° < α < 60 °.

8. The mold of claim 6, wherein: the first surface and the second surface are both provided as slopes.

9. The mold of claim 6, wherein: the first surface and the second surface are both provided with cambered surfaces.

10. The mold of claim 1, wherein: and a pouring opening communicated with the cavity is formed in the surface of the mold.

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