CN218488986U

CN218488986U - Thin runner device of three-plate mold

Info

Publication number: CN218488986U
Application number: CN202222129762.4U
Authority: CN
Inventors: 王月; 郭蜻蜻; 陈运东
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2023-02-17
Anticipated expiration: 2032-08-12

Abstract

The utility model discloses a thin runner device of three-plate mold for advance to glue to the sphere structure, include: a cold main runner; the cold runners are arranged along the circumferential direction of the cold main runner and are communicated with the outlet end of the cold main runner; the first end of the central branch flow passage is communicated with the cold main flow passage, and the second end of the central branch flow passage is communicated with a central pouring gate; the circumferential branch runners are distributed around the circumference of the central branch runner, the first ends of the circumferential branch runners are communicated with the cold runners in a one-to-one correspondence mode, and the second ends of the circumferential branch runners are respectively communicated with and provided with circumferential gates. During pouring, the central pouring gate and the circumferential pouring gate are opened simultaneously, so that the flowing balance of molten materials is ensured, the rubber coating behavior is eliminated, and the roundness of a product is ensured; in addition, the molten materials are injected with glue from the top end and the circumferential direction at the same time, so that the gas in the cavity is continuously collected downwards, the exhaust is facilitated, and the problems of short shot, trapped gas, scorching, color fogging and the like are avoided.

Description

Thin runner device of three-plate mold

Technical Field

The utility model relates to the technical field of mold, in particular to thin runner device of three-plate mould.

Background

In the opening process of plastic products, the glue feeding mode of the products has great influence on the molding condition of the products, and the positions, the number, the arrangement, the patterns and the like of glue feeding openings play an extremely important role in the manufacture of the final qualified products. The commonly used glue inlet gates are thin water gaps, side gates, submarine gates, straight gates, hot runner gates and the like, and each gate has corresponding use advantages and application range.

Compared with a common two-plate mold, the thin water-jet mold is provided with a plurality of runner plates and belongs to a three-plate mold.

Spherical surface structure products such as spherical bases, disc bases and the like are generally used as main assembly parts and are matched with other parts for assembly; in addition, many of them also serve as load-bearing structures, carrying the weight of the remaining components, and therefore have high requirements on their roundness deformation and structural strength. The roundness deformation and the structural strength of the product have great relevance to the flow mode of the molten material in the injection molding and filling process of the product.

At present, for spherical products such as round bases, disc bases and the like, in order to ensure the flow balance of molten materials and the final roundness of products in the injection molding process, glue inlet gates 01 are generally uniformly distributed along the periphery of the products, the specific number is determined according to the size of the products, generally three points are arranged, and the difference between each point is 120 degrees, as shown in fig. 1.

However, when the high polymer material is used for injection molding, the central area of the spherical product is seriously encapsulated due to the flow characteristics (fountain type flow mode, i.e. the flow direction is fast in the middle and slow at both ends) of the high polymer material, so that the roundness of the spherical product is affected.

In addition, in the process of pouring, the mode of pouring the periphery leads to the problem that the top of the cylinder cannot be fully exhausted in the later period, namely, the gas trapping behavior is generated, and the problems of short shot, gas trapping scorching, color fogging and the like are generated.

In addition, the weld line 02 (as shown in fig. 2) generated by the gate injection in the manner of gate distribution around the periphery is long, which affects the structural strength of the product.

Because plastic materials have shrinkage characteristics, for products with larger sizes, the glue inlet gate 01 distribution mode can cause shrinkage defects due to overlarge flowing distance, insufficient pressure maintaining and insufficient pressure meeting the flowing of raw materials, so that the roundness of the products is influenced.

Therefore, how to ensure the roundness of a spherical product is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a thin runner device of three-plate mould guarantees the circularity of spherical structure product.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a thin runner device of three-plate mould for advance to gluey to spherical structure, it includes:

a cold main runner; the cold runners are arranged along the circumferential direction of the cold main runner and are communicated with the outlet end of the cold main runner;

a first end of the central branch flow channel is communicated with the cold main flow channel, and a second end of the central branch flow channel is communicated with a central pouring gate; the circumferential branch runners are distributed around the circumference of the central branch runner, the first ends of the circumferential branch runners are communicated with the cold runners in a one-to-one correspondence mode, and the second ends of the circumferential branch runners are respectively communicated with and provided with circumferential gates.

Preferably, in the three-plate mold thin runner device, a center line of the center branch runner coincides with a center line of the cooling main runner;

the cold runner is evenly distributed along the circumferential direction of the cold main runner, the lengths of the cold runners are the same, and the distances from the circumferential branch runners to the cold main runner are the same.

Preferably, in the three-plate mold fine gate device, the central branch runner and the circumferential branch runner are arranged in parallel, and the cold runner and the circumferential runner are arranged perpendicularly,

the axis of the center gate and the axis of the circumferential gate are arranged in parallel.

Preferably, in the three-plate mold fine gate apparatus, a cross section of the cold runner is a trapezoidal surface or an arc surface tapered from the cold main runner to the center branch runner.

Preferably, in the three-plate mold fine gate device, the cold main runner is a conical pipe gradually expanding from an inlet end to an outlet end;

the central branch flow channel is a conical pipe which is gradually reduced from the first end of the central branch flow channel to the second end of the central branch flow channel;

the circumferential branch flow channel is a conical pipe which is gradually reduced from the first end of the circumferential branch flow channel to the second end of the circumferential branch flow channel.

Preferably, in the three-plate mold thin runner device, three circumferential branch runners are uniformly arranged along the circumferential direction of the central branch runner.

Preferably, in the three-plate mold thin gate device, the diameter of the central gate and the diameter of the circumferential gate are both 1.2mm to 1.5mm.

Preferably, in the three-plate mold thin gate device, the central gate and the peripheral gate are both conical pieces tapered from a connecting end to a tip end.

Preferably, in the three-plate mold fine-runner device, the cold main runner, the cold runner, the central branch runner and the circumferential branch runner are of an integrally formed structure;

or the like, or, alternatively,

the cold runner and the cold main runner are detachably connected, and the circumferential branch runners and the central branch runners are detachably connected with the cold runner respectively.

Preferably, in the three-plate mold thin gate device, the length of the central branch flow channel is smaller than that of the circumferential branch flow channels, and the lengths of the circumferential branch flow channels are the same.

The utility model provides a three-plate mold thin sprue device, through having increased central branch runner and central runner with cold sprue connection, during the pouring, central runner and circumference runner are opened simultaneously, do not have the primary and secondary branch, guarantee the equilibrium that the melting charge flows, eliminate the rubber coating action, have guaranteed the circularity of product; in addition, the molten materials are injected with glue from the top end and the circumferential direction at the same time, so that the gas in the cavity is continuously collected downwards, the exhaust is facilitated, and the problems of short shot, trapped gas, scorching, color fogging and the like are avoided.

In addition, the mode of adopting center runner and circumference runner for the distribution of the position of the weld line that the material stream of stranded converges and produces is also comparatively dispersed, and length is shorter moreover, has guaranteed the structural strength of product.

Moreover, the mode of adopting central runner and circumference runner still can shorten the distance that the melting material flows for the pressurize is abundant, guarantees that the product shrink condition is more even, has guaranteed the circularity of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a melt flow direction in the application of a three-plate mold thin gate device disclosed in the prior art;

FIG. 2 is a graph showing a position distribution of a weld line generated when the triple-plate mold thin gate apparatus disclosed in the prior art is applied;

FIG. 3 is a schematic view of the flow direction of the melt when the three-plate mold thin gate device disclosed in the embodiment of the present invention is applied;

fig. 4 is a front view of a three-plate mold thin gate device disclosed in an embodiment of the present invention in use;

FIG. 5 is a diagram showing a position distribution of a weld line generated when the three-plate mold thin gate apparatus disclosed in the embodiment of the present invention is applied;

fig. 6 is a schematic structural view of a three-plate mold thin sprue device disclosed in an embodiment of the present invention;

fig. 7 is a front view of a three-plate mold thin runner device disclosed in an embodiment of the present invention;

fig. 8 is a top view of a three-plate mold thin runner apparatus disclosed in an embodiment of the present invention;

wherein the content of the first and second substances,

01 is a glue inlet sprue and 02 is a welding line;

1 is a cold main runner, 2 is a cold runner, 3 is a circumferential branch runner, 4 is a circumferential sprue, 5 is a central branch runner, 6 is a central sprue, and 7 is a weld line.

Detailed Description

The utility model discloses a thin runner device of three-plate mould guarantees the circularity of spherical structure product.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood 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.

As shown in fig. 3-8, the utility model discloses a three-plate mold thin sprue device for glue is entered to the spherical structure to complete spherical structure's injection moulding. The method specifically comprises the following steps: the cooling main runner 1, the cooling runner 2, the central branch runner 3 and the circumferential branch runner 5.

During assembly, the cold runner 2 is arranged along the circumferential direction of the cold main runner 1 and can be uniformly arranged in actual application, and the cold main runner 1 is communicated with the cold runner 2. The central branch flow channel 3 is communicated with the cold main flow channel 1, specifically, the center of the cold main flow channel 1 is communicated with the center of the cold flow channel 2, and meanwhile, the central branch flow channel 3 is also communicated with the center of the cold flow channel 2, so that the central branch flow channel 3 is communicated with the cold main flow channel 1. In addition, the first ends of the circumferential branch runners 5 are in one-to-one correspondence with the cold runners 2.

In the injection molding process, raw materials flow to the outlet end of the cold main runner 1 through the inlet end of the cold main runner 1, one part of the raw materials flows to each circumferential branch runner 3 through the main runner 2, and the other part of the raw materials directly flows into the central branch runner 5. The raw material is injected into the cavity under the guiding action of the center gate 6 and the circumferential gate 4.

In the utility model, the central branch runner 5 and the central pouring gate 6 which are connected with the cold main runner 1 are added, when pouring is carried out, the central pouring gate 6 and the circumferential pouring gate 4 are opened simultaneously, no primary and secondary division is available, the top and the circumferential direction of the spherical product are injected with glue simultaneously, the balance of the flow of molten material is ensured, the top encapsulation behavior of the spherical product is eliminated, and the roundness of the product is ensured; in addition, the molten material is injected with glue from the top end and the circumferential direction simultaneously, so that the gas in the cavity is collected continuously and downwards, the exhaust is convenient, and the problems of short shot, trapped gas, scorching, color fogging and the like are avoided.

In addition, the mode of the central gate 6 and the circumferential gate 4 is adopted, so that the distribution of the position of a welding line 7 generated by the confluence of a plurality of material flows is more dispersed, the length is shorter, and the structural strength of a product is ensured.

Moreover, the mode of the central sprue 6 and the circumferential sprue 4 is adopted, the flowing distance of the molten material can be shortened, the pressure maintaining is sufficient, the product shrinkage condition is ensured to be more uniform, and the roundness of the product is ensured.

In the specific application, the central line of the central branch flow channel 5 is overlapped with the central line of the main cooling flow channel 1, so that a part of the molten material in the main cooling flow channel 1 can directly enter the central branch flow channel 5, the molten material is distributed more uniformly along the circumferential direction, and the same flow velocity of the molten material in the circumferential branch flow channel 3 is ensured.

In the actual injection molding production process, after the injection molding machine enters the glue through the cold main runner 1, the central pouring gate 6 and the circumferential pouring gate 4 discharge the glue basically at the same time. Due to the actual flow distance, the glue discharging from the central gate 6 is about 0.2s faster, but the influence on the overall melt flow behavior is not great.

When the cold runners 2 are arranged, the cold runners 2 are uniformly distributed along the circumferential direction of the cold main runner 1, the lengths of the cold runners 2 are the same, and the distances from the circumferential branch runners 3 to the cold main runner 1 are the same. The arrangement can ensure that the circumferential branch runners 3 are uniformly arranged around the circumference of the central branch runner 5 and have the same distance to the cold main runner 1. During injection molding, the distance and the flow velocity of the molten material flowing out of the cold main runner 1 to reach each circumferential branch runner 3 can be ensured to be the same, and the roundness of a product is further ensured.

Further, as shown in fig. 4 and 7 in conjunction, the center branch flow path 5 described above is arranged in parallel with the circumferential branch flow path 3, and the cold flow path 2 is arranged perpendicularly to the circumferential branch flow path 3, and further, the axis of the center gate 6 is arranged in parallel with the axis of the circumferential gate 4. The above-described arrangement may be that of a particular application to facilitate processing. In practice, the circumferential branch runners 3 may be inclined with respect to the central branch runner 5, or the cold runners 2 may be inclined runners, and it is necessary to ensure that all the branch runners are inclined at the same direction and angle, or all the cold runners 2 are inclined at the same direction and angle.

As shown in fig. 4 and 7, the cold main runner 1 is arranged in a vertical direction, the cold runner 2 is arranged in a horizontal direction, the central branch runners 5 and the circumferential branch runners 3 are arranged in a vertical direction, the central branch runners 5 and the circumferential branch runners 3 are located on one side of the cold runner 2, and the cold main runner 1 is located on the other side of the cold runner 2.

In a specific application embodiment, the cross section of the cold runner 2 is a trapezoidal surface or an arc surface which is tapered from the cold main runner 1 to the central branch runner 5. For convenience of description, the side where the main cooling runner 1 is installed is referred to as the upper end surface of the cooling runner 2, and the side where the circumferential branch runners 3 are installed is referred to as the lower end surface. The size of the cold runner 2 is determined by the product size and the fluidity of the material used, and is generally set to be 8mm 6.1mm. The length of the thin water opening flow channel is determined by the thickness of a fixed die plate which is actually designed.

In addition, as shown in fig. 3, 4, 6 and 7, the cooling main flow passage 1 in the present embodiment is a conical pipe gradually expanding from the inlet end to the outlet end; the central branch flow passage 5 is a conical pipe which is gradually reduced from the first end of the central branch flow passage 5 to the second end of the central branch flow passage 5; the circumferential branch flow channels 3 are all conical pipes gradually reduced from the first ends of the circumferential branch flow channels 3 to the second ends of the circumferential branch flow channels 3. That is, in practice, the cooling main runner 1, the central branch runner 5 and the circumferential branch runners 3 are all provided with a conical structure to guide the melt and facilitate the demolding.

In the process of spherical structure injection molding, in order to ensure the flow balance of molten materials and the final roundness of a product in the injection molding process, the circumferential gates 4 are generally uniformly distributed along the circumference of the product, the specific number is determined according to the size of the product, generally three points are arranged, and the difference between each point is 120 degrees. And the center gate 6 is located at the center of the three circumferential gates 4. When the center gate type hot melt adhesive is used, the center gate 6 is arranged at the center of the back surface or the front surface of a product, and the diameter of the center gate 6 is 1.2mm-1.5mm. Then, three circumferential gates 4 are arranged around the central gate 6, the positions of the three circumferential gates 4 can be easily adjusted according to the specific structure of the product, the three circumferential gates are approximately located at the trisection points far away from the center of the trisection radius, and the diameter of the circumferential gates 4 is generally 1.2mm-1.5mm.

It will be understood by those skilled in the art that the diameters of the central gate 6 and the circumferential gates 4 may be set according to different requirements and are within the protection range.

The central gate 6 and the circumferential gate 4 are conical pieces tapered from the connecting end to the tip end. It should be noted that, the central gate 6 and the circumferential gates 4 are arranged in parallel and are located on the same side of the cold runner 2, and the openings face the same direction.

The connecting end is the end where the central gate 6 and the circumferential gate 4 are connected with the cold runner 2, and the tail end is the opening end of the central gate 6 and the circumferential gate 4. Taking fig. 7 as an example, the direction is from top to bottom in fig. 7.

The processed product is a spherical structure product, and in order to be suitable for the shape of a spherical surface, the axial length of the central branch flow passage 5 in the scheme is smaller than that of the circumferential branch flow passages 3. Since the circumferential branch flow paths 3 are located on the same circumferential surface centered on the central branch flow path 5, the circumferential branch flow paths 3 are all the same in length.

For convenience of processing, the cold main runner 1, the cold runner 2, the central branch runner 5 and the circumferential branch runner 3 may be preferably provided as an integrally molded structure. Namely, the whole three-plate mould thin sprue device is of an integrally formed structure and can be an injection molding part.

In addition, in order to adapt to different workpieces, the whole three-plate mold fine gate device is modularized, and particularly, the cold runner 2 is detachably connected with the cold main runner 1, for example, in a clamping or threaded manner; accordingly, the circumferential branch flow channel 3 and the central branch flow channel 5 are detachably connected to the cold flow channel 2, for example, by clipping or screwing. Adopt modular structure, can change the distance of circumference runner 4 and central runner 6 according to the sphere size for the angle that 7 material front of a knife or a sword of adjustment weld line converged, the position that 7 appear of weld line, the temperature of the material front of a knife or a sword flow forward position, and the holistic shrink of product, thereby optimize 7 quality of weld line and the volume shrinkage factor of product.

It should be noted that, in practice, the three-plate mold fine gate device may be provided as an integral structure, and the length of the cold runner is determined during machining according to the spherical size requirement.

As used herein, the terms "a," "an," "the," and/or "the" are not intended to be inclusive and include the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising one of \ 8230: \ 8230:" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a thin runner device of three-plate mold for advance gluey to the sphere structure, its characterized in that includes:

2. The triple-mold thin gate device according to claim 1, wherein a centerline of the center branch runner coincides with a centerline of the cold main runner;

the cold runners are uniformly distributed along the circumferential direction of the cold main runner, the lengths of the cold runners are the same, and the distances from the circumferential branch runners to the cold main runner are the same.

3. The three-plate mold thin gate device according to claim 1, wherein the central branch flow channel is arranged in parallel with the circumferential branch flow channel, and the cold flow channel is arranged perpendicular to the circumferential flow channel,

4. The three-plate mold thin gate device according to claim 3, wherein the cross section of the cold runner is a trapezoidal surface or an arc surface which tapers from the cold main runner to the central branch runner.

5. The triple-plate mold thin gate device according to claim 1, wherein the cold main runner is a conical pipe gradually expanding from an inlet end to an outlet end;

6. The apparatus of claim 5 wherein three of the circumferential runners are arranged uniformly around the circumference of the central runner.

7. The three-plate mold thin gate device according to claim 6, wherein the diameter of the central gate and the diameter of the circumferential gate are both 1.2mm to 1.5mm.

8. A three-plate mold thin gate device according to any one of claims 1 to 7, wherein the central gate and the circumferential gate are conical pieces tapered from a connecting end to a tip end.

9. The three-plate mold thin gate device according to any one of claims 1 to 7, wherein the cold main runner, the cold runner, the central branch runner and the circumferential branch runner are of an integrally molded structure;

or the like, or, alternatively,

the cold runner with the cold sprue can be dismantled and be connected, circumference branch runner with center branch runner respectively with the cold runner can be dismantled and be connected.

10. The three-plate mold thin gate device according to any one of claims 1 to 7, wherein the length of the central branch flow channel is smaller than the length of the circumferential branch flow channels, and the lengths of the circumferential branch flow channels are the same.