CN213166627U - Laminated injection mold - Google Patents

Abstract

The utility model discloses a laminated injection mold, which is characterized by comprising a plurality of templates, wherein each template comprises an upper template, a lower template and a plurality of intermediate templates positioned between the upper template and the lower template, a cavity and a runner communicated with the cavity are arranged between the adjacent templates, a plurality of injection molding holes communicated with each layer of runner are arranged on the upper surface of the upper template, the injection molding holes are step-shaped and comprise a plurality of hole column sections with gradually reduced cross sections from top to bottom; the middle part of the flow channel is provided with a throttling element for adjusting the flow passing through the flow channel; the utility model discloses a comprehensive setting of the type form in hole of moulding plastics and runner department throttle can be adjusted the injection moulding time of each die cavity, makes the fashioned part of each die cavity have good uniformity.

Description

Laminated injection mold

Technical Field

The utility model relates to a plastic part shaping frock technical field, in particular to stromatolite injection mold.

Background

In the molding production of large-scale plastic parts, because the occupation area of the molded cavity is large, the traditional molding die can only mold one part at a time, and the production efficiency is low. The laminated mold is a mold structure gradually applied and matured in recent years and comprises a plurality of mold plates, and molding cavities are respectively arranged between the adjacent mold plates. The laminated injection mold is used for molding large plastic parts, a plurality of parts can be molded by one-time injection molding, and the molding efficiency is high.

Because the stacked injection mold is provided with a plurality of cavities, when injection molding is carried out, each molten feed liquid can enter each cavity successively, and further the molding time of parts in each cavity is inconsistent, so that the parts produced by injection molding cannot be guaranteed to have good consistency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stromatolite injection mold, through the type form in the hole of moulding plastics and the comprehensive setting of runner department throttle spare, can adjust the injection moulding time of each die cavity, make the fashioned part of each die cavity have good uniformity.

The above technical purpose of the present invention can be achieved by the following technical solutions: a laminated injection mold comprises a plurality of templates, wherein each template comprises an upper template, a lower template and a plurality of intermediate templates positioned between the upper template and the lower template, a cavity and a runner communicated with the cavity are arranged between the adjacent templates, a plurality of injection molding holes communicated with the runners of each layer are formed in the upper surface of the upper template, and the injection molding holes are step-shaped and comprise a plurality of hole column sections with the cross sections sequentially reduced from top to bottom; and the middle part of the flow channel is provided with a throttling element for adjusting the flow passing through the flow channel.

Through adopting above-mentioned scheme, the hole of moulding plastics adopts the step form, including the hole post section that a plurality of sections from the top down cross section reduced in proper order, and then when the hole of moulding plastics pours into the liquid material into, the hole post section of lower floor can be filled fast, and then shortens the liquid material and gets into each layer runner time difference, and through setting up the throttling element on the runner, adjust the flow that passes through of runner, thereby the product shaping time that can each die cavity tends to unanimously, and then the product that makes each die cavity has good uniformity.

Preferably, the throttling element is a cylindrical head bolt; the runner middle part is provided with cylinder type recess, the countersunk head screw hole with the coaxial setting of cylinder type recess is seted up to the tank bottom of cylinder type recess, the cylinder head bolt is located countersunk head screw hole department and with countersunk head screw hole thread engagement.

By adopting the scheme, the cylindrical head bolts at the flow passages are rotated, so that the heads of the cylindrical head bolts are hidden in or exposed out of the countersunk parts of the countersunk threaded holes, the flow passing through the flow passages is adjusted, the material injection time and the molding time of each layer of cavity are adjusted, and the molded parts of each layer of cavity have good consistency.

Preferably, a fan-shaped groove with a cross section gradually increasing from one end of the flow passage to one end of the cavity is arranged at the junction of the flow passage and the cavity.

By adopting the scheme, the cross-sectional area of the contact position of the runner and the cavity is increased by arranging the fan-shaped groove, so that the phenomena of insufficient pouring and the like at the runner position of the cavity are reduced.

Preferably, the injection molding holes of the upper template and the middle template are embedded with pouring parts, the pouring parts are provided with pouring holes which axially penetrate through the pouring parts, and the pouring holes comprise straight hole sections positioned at the upper ends and a plurality of conical hole sections with cross sections gradually increasing from top to bottom.

Through adopting above-mentioned scheme, all be embedded into through the injection hole of cope match-plate pattern and middle template and water the piece to water the hole of watering of piece and including the straight hole section that is located the upper end and the taper hole section that a plurality of sections cross sections from the top down crescent, thereby the convenience is to when the drawing of patterns to the part, demold the runner clout.

Preferably, the upper surface of the upper template at the injection hole is provided with an anti-overflow groove.

Through adopting above-mentioned scheme, the anti-overflow recess has been seted up through the cope match-plate pattern upper surface of the department of moulding plastics hole, and then keeps in the liquid material that the hole of moulding plastics spills over when carrying out the injection material to the hole of moulding plastics, avoids it to overflow on the upper surface of cope match-plate pattern.

Preferably, the number of the injection holes is an even number of four, and the injection holes are symmetrical about a central plane of the upper die plate.

By adopting the scheme, the number of the injection molding holes is an even number which is four at least, and the injection molding holes are symmetrical about the central plane of the upper template, so that liquid materials can be efficiently and uniformly injected into the cavity.

Preferably, the cavity is ring-shaped.

By adopting the scheme, for products such as the ring-shaped rings and the like with the annular cavities, even number of injection molding holes are adopted, and the injection molding holes are symmetrically arranged, so that the product forming effect is better.

To sum up, the utility model discloses following beneficial effect has:

1. the injection molding hole adopts the step form, including the hole post section that a plurality of sections cross sections from the top down reduced in proper order, and then when injecting the hole injection liquid material into, the hole post section of lower floor can be filled fast, and then shorten the liquid material and get into each layer runner time difference, cross the cylinder head bolt to each runner department and rotate, and then make the head of cylinder head bolt hide in the countersunk head part of countersunk head screw hole or expose by countersunk head part, thereby adjust the flow that passes through of each runner, thereby the product shaping time that can each die cavity tends to the unanimity, and then the product that makes each die cavity has good uniformity.

2. The quantity of the injection molding holes is an even number of four at least, and the injection molding holes are symmetrical about the central plane of the upper template, so that liquid materials can be efficiently and uniformly injected into the cavity, and a fan-shaped groove with a cross section gradually increased from one end of the flow channel to one end of the cavity is formed in the junction of the flow channel and the cavity, so that the quality of a molded product is well guaranteed.

Drawings

FIG. 1 is a schematic structural view of a stack injection mold;

FIG. 2 is a schematic structural diagram showing the positional relationship of injection holes;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a schematic structural view of an up-runner component;

FIG. 5 is a schematic view of the structure of the down runner piece;

FIG. 6 is a schematic view showing the structure of the flow channel.

In the figure, 1, an upper template; 11. an anti-overflow groove; 2. a lower template; 3. an intermediate template; 4. a cavity; 5. A flow channel; 51. a cylindrical groove; 52. countersunk threaded holes; 53. a fan-shaped groove; 6. injection molding holes; 7. a cylindrical head bolt; 8. a runner piece; 81. pouring holes; 811. a straight hole section; 812. a tapered bore section; 82. a runner piece; 83. a lower runner piece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b):

a laminated injection mold is mainly used for molding production of large-scale sealing plastic parts with ring-shaped cavities 4 such as sealing rings and the like by referring to fig. 1 and 2, and comprises a plurality of mold plates, wherein the cavities 4 and runners 5 communicated with the cavities 4 are arranged between the adjacent mold plates, and a plurality of injection molding holes 6 communicated with the runners 5 of each layer are formed in the upper surface of an upper mold plate 1. The number of the injection molding holes 6 is an even number of four in the minimum, the injection molding holes 6 are symmetrical about the central plane of the upper template 1, in the embodiment, a three-plate two-cavity structure is adopted, and the template comprises the upper template 1, the lower template 2 and a plurality of middle templates 3 located between the upper template 1 and the lower template 2. 8 injection holes 6 have been seted up to the upper surface of cope match-plate pattern 1, through setting up injection holes 6 to the even number about the central plane symmetry of cope match-plate pattern 1 to can evenly carry out the feed liquid to die cavity 4 with the efficient and pour into, shorten the notes material time of die cavity 4, make die cavity 4 each department annotate the material more evenly. When the molding process is finished, the mold plates are separated from top to bottom in sequence, and the molded part in each cavity 4 is demolded and taken out.

The upper surface of the upper template 1 at the injection molding hole 6 is provided with an anti-overflow groove 11. Through anti-overflow recess 11's setting, make things convenient for the staff to annotate the material to injection hole 6, can keep in simultaneously by the feed liquid that injection hole 6 spilled over, avoided the feed liquid that spills over to be infected with at 1 upper surface of cope match-plate pattern.

Referring to fig. 3 and 5, the injection hole 6 is stepped and includes a plurality of hole column sections having cross sections decreasing from top to bottom. All having embedded in the hole 6 of moulding plastics of cope match-plate pattern 1 and middle template 3 and having watered piece 8, water and set up the axle and run through watering 8 of a hole 81 that waters 8, water hole 81 including the straight hole section 811 that is located the upper end and several sections cross section from the top down taper hole section 812 that gradually increases. The injection molding holes 6 are step-shaped, so that the passing area of liquid materials from top to bottom is sequentially reduced, and further, when the liquid materials are injected, the hole sections of the injection molding holes 6 at the lower layer can be quickly filled, so that the time difference of the liquid materials entering the upper and lower layers of flow passages 5 is reduced, and the injection time of the cavities 4 at all layers tends to be consistent. Through set up in injection hole 6 and water a piece 8, will water hole 81 including the straight hole section 811 that is located the upper end and the taper hole section 812 of a plurality of sections cross section from the top down crescent to the convenience is when carrying out the split mould to the template, carries out the drawing of patterns to the runner clout. In this embodiment, the runner component 8 includes an upper runner component 82 and a lower runner component 83, the shapes of the upper and lower runner components 82 and 83 being shown in fig. 3 and 4, respectively.

Referring to fig. 3 and 6, a throttle member for adjusting the flow rate of the flow passage 5 is provided in the middle of the flow passage 5. The throttling element adopts a cylindrical head bolt 7; the middle part of the flow passage 5 is provided with a cylindrical groove 51, the bottom of the cylindrical groove 51 is provided with a countersunk threaded hole 52 which is coaxial with the cylindrical groove 51, and the cylindrical head bolt 7 is positioned at the countersunk threaded hole 52 and is in threaded engagement with the countersunk threaded hole 52. Through rotating the cylinder head bolt 7 of each layer of runner 5 department, and then make the head of cylinder head bolt 7 hide in the countersunk head part of countersunk head screw hole 52, perhaps leak by the countersunk head part, and then can adjust the through-flow of each runner 5 to better annotate the material time and the shaping time of each die cavity 4 and adjust control, make the product of each die cavity 4 have good uniformity.

A fan-shaped groove 53 with the cross section gradually increasing from one end of the flow passage 5 to one end of the cavity 4 is arranged at the junction of the flow passage 5 and the cavity 4. Through the arrangement of the fan-shaped groove 53, the contact cross-sectional area of liquid materials at the joint position of the runner 5 and the cavity 4 is increased, so that the phenomena of insufficient cast-in-place, material shortage and the like at the cavity 4 contacted with the runner 5 are reduced.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (7)

1. The utility model provides a stromatolite injection mold, includes a plurality of templates, the template includes cope match-plate pattern (1), lower bolster (2) and a plurality of intermediate formword (3) that are located between cope match-plate pattern (1) and lower bolster (2), is provided with between the adjacent template die cavity (4) and runner (5) with die cavity (4) intercommunication, injection hole (6) that a plurality of and each layer runner (5) communicate are seted up to the upper surface of cope match-plate pattern (1), its characterized in that: the injection molding hole (6) is step-shaped and comprises a plurality of hole column sections with cross sections sequentially reduced from top to bottom; and a throttling piece for adjusting the flow passing through the flow of the flow channel (5) is arranged in the middle of the flow channel (5).

2. A stack injection mold according to claim 1, characterized in that: the throttling element adopts a cylindrical head bolt (7); runner (5) middle part is provided with cylinder type recess (51), countersunk screw hole (52) with the coaxial setting of cylinder type recess (51) are seted up to the tank bottom of cylinder type recess (51), cylinder head bolt (7) are located countersunk screw hole (52) department and with countersunk screw hole (52) thread engagement.

3. A stack injection mold according to claim 1, characterized in that: and a fan-shaped groove (53) with the cross section gradually increasing from one end of the flow channel (5) to one end of the cavity (4) is arranged at the junction of the flow channel (5) and the cavity (4).

4. A stack injection mold according to claim 1, characterized in that: all be embedded in the injection hole (6) of cope match-plate pattern (1) and middle template (3) and have watered a piece (8), water a hole (81) of watering a piece (8) and set up axial run through, water hole (81) including being located the straight hole section (811) of upper end and several sections cross section taper hole section (812) that increase gradually from top to bottom.

5. A stack injection mold according to claim 1, characterized in that: and an anti-overflow groove (11) is formed in the upper surface of the upper template (1) at the injection molding hole (6).

6. A stack injection mold according to claim 1, characterized in that: the number of the injection molding holes (6) is an even number with a minimum of four, and the injection molding holes (6) are symmetrical about the central plane of the upper template (1).

7. A stack injection mold according to claim 6, characterized in that: the cavity (4) is ring-shaped.

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