CN219705932U - Cold runner injection mold structure capable of reducing waste materials - Google Patents

Abstract

The utility model discloses a cold runner injection mold structure for reducing waste, which relates to the technical field of cold runner injection molds and comprises a pressing assembly and a mold cavity assembly, wherein the pressing assembly and the mold cavity assembly are sequentially arranged from top to bottom, a material groove plate is arranged between the pressing assembly and the mold cavity assembly, a containing groove for containing raw materials is formed in the upper end face of the material groove plate, a pouring hole for enabling the containing groove to be communicated with the mold cavity is formed in the inner bottom surface of the containing groove in a penetrating manner, a pressing part in plug-in fit with the containing groove is arranged on the pressing assembly, a cooling water device for guaranteeing that the raw materials keep constant temperature is embedded in the material groove plate, the material groove plate is taken out before vulcanizing the raw materials in the mold cavity, the residual raw materials in the containing groove and the raw materials in the mold cavity are prevented from being vulcanized together, and the cooling water device is guaranteed that the residual raw materials in the containing groove are kept constant temperature all the time, so that the waste of the residual raw materials can be avoided, the residual raw materials can be used continuously, and the cost can be effectively saved by reducing the generation of waste materials.

Description

Cold runner injection mold structure capable of reducing waste materials

Technical Field

The utility model relates to the technical field of cold runner injection molds, in particular to a cold runner injection mold structure capable of reducing waste.

Background

According to the Chinese patent application No. CN202222233849.6, the common rubber injection molding die heats and vulcanizes the rubber material in the pouring system and the rubber material in the cavity together during vulcanization molding, and the vulcanized rubber in the pouring system is discarded as waste after the die is opened. The amount of waste generated by each injection is related to the number of cavities, and for a single-cavity mold for forming a large workpiece, the amount of waste generated is smaller than the amount of workpiece used, but for a multi-cavity mold for forming a small workpiece, the amount of waste generated is larger than the amount of workpiece used. In particular to a high-precision small-sized workpiece which is molded by a plurality of pouring holes and needs injection, besides the number of the sub-runners is required to be arranged according to the number of the cavities, the number of the sub-runners is required to be additionally arranged according to the number of the pouring holes in each cavity, so that the number of the sub-runners is increased. The result is a multiple increase in the waste material produced per injection, resulting in a significant waste of raw materials.

According to the prior art described in the chinese patent application No. CN202222233849.6, rubber injection molding is generally performed by injecting a plasticized rubber material into a mold cavity for vulcanization molding, wherein a casting system is provided in the mold, and the plasticized rubber material is injected into the mold cavity through the casting system and then vulcanized molding is performed. In the common rubber injection molding die, rubber in a pouring system and rubber in a cavity are heated and vulcanized together during vulcanization molding, vulcanized rubber in the pouring system is turned into waste materials after die opening and is thrown away, and for small-sized products, the proportion of the thrown waste materials is large, so that raw materials are wasted.

Therefore, the utility model provides a cold runner injection mold structure capable of reducing waste generation and saving cost to solve the problems.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a technical scheme with a structure capable of solving the problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a cold runner injection mold structure for reducing waste comprises a pressing component and a mold cavity component, wherein the pressing component and the mold cavity component are sequentially arranged from top to bottom;

a material groove plate is arranged between the pressing component and the die cavity component;

the upper end face of the material tank plate is provided with a containing groove for containing raw materials, wherein the inner bottom surface of the containing groove is penetrated with a pouring hole for enabling the containing groove to be communicated with a die cavity;

the pressing component is provided with a pressing injection part which is in plug-in fit with the accommodating groove;

and a cooling water device for keeping the raw materials constant temperature is embedded in the trough plate.

As a further scheme of the utility model: the pressing assembly comprises an upper locking plate and a pressing plate which are arranged from top to bottom, and the pressing injection part is arranged on the lower end surface of the pressing plate;

the die cavity assembly comprises an upper plate, a middle plate, a lower plate and a lower locking plate which are sequentially arranged from top to bottom;

the trough plate is arranged between the material pressing plate and the upper plate, a first heat insulation plate is arranged between the material pressing plate and the upper locking plate, the first heat insulation plate is fixedly matched with the material pressing plate, a second heat insulation plate is arranged between the material trough plate and the upper plate, and the material trough plate is fixedly matched with the second heat insulation plate;

the upper plate, the middle plate and the lower plate are respectively provided with a forming part, the die cavity is formed by the forming parts in the upper plate, the middle plate and the lower plate, and the upper plate is provided with a feed inlet in a penetrating way, so that raw materials enter the die cavity;

wherein, run through on the second heat insulating board and be equipped with the intercommunicating pore that makes pouring hole and die cavity intercommunication setting.

As a further scheme of the utility model: the cooling water device comprises a cooling pipe;

the plurality of pouring holes are respectively arranged at two sides of the cooling pipe and are uniformly distributed along the length direction of the cooling pipe;

the cooling pipes are arranged in the trough plate in parallel.

As a further scheme of the utility model: the upper end face of the first heat insulation plate is uniformly provided with a plurality of plug holes, and plug posts in one-to-one plug fit with the plug holes are formed on the lower end face of the upper lock plate.

As a further scheme of the utility model: the flow channel sleeve is arranged along the inner wall of the communication hole, the upper end of the flow channel sleeve is arranged in the first groove and the second groove, and the outer wall of the upper end of the flow channel sleeve is respectively in butt fit with the inner walls of the first groove and the second groove;

the lower end of the runner sleeve extends downwards, a third groove for accommodating the lower end of the runner sleeve is formed in the upper end face of the upper plate, the lower end of the runner sleeve is in plug fit with the third groove, and the pouring hole and the die cavity are communicated through a diversion hole in the runner sleeve;

the first groove is arranged concentrically with the casting hole, the second groove is arranged concentrically with the first groove, and the third groove is arranged concentrically with the injection hole.

As a further scheme of the utility model: the lower end face of the lower plate is provided with a mounting hole, an insert is mounted in the mounting hole, and the insert penetrates through the lower plate and extends into the die cavity;

the lower end face of the upper plate is provided with a positioning groove, and the upper end of the insert is provided with a protruding part which is in plug-in fit with the positioning groove.

Compared with the prior art, the utility model has the following beneficial effects: through carrying out the vulcanizing the interior raw materials of die cavity before, take out the silo board, avoid remaining raw materials and the raw materials in the die cavity together vulcanize, the rethread sets up the cooling water device and will guarantee that the interior remaining raw materials of holding tank remains constant temperature throughout to can avoid the waste of remaining raw materials, can make remaining raw materials continue to use, can reach the production that reduces the waste material also can effectually save the cost, avoid extravagant.

Drawings

FIG. 1 is a perspective view of the structure of the present utility model;

FIG. 2 is a side view of the present utility model;

FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is a partial view at D in FIG. 3;

FIG. 5 is a schematic view of the cross-sectional structure along the direction B-B in FIG. 2;

FIG. 6 is a partial view at E in FIG. 5;

FIG. 7 is a schematic view of the cross-sectional structure along the direction C-C in FIG. 2;

reference numerals and names in the drawings are as follows:

pressing down the assembly-1;

an upper locking plate-2, a splicing column-21, a pressing plate-22 and a pressing injection part-23;

the first heat insulation plate-3, the splicing hole-31;

a material groove plate-4, a containing groove-41, a casting hole-42 and a first groove-43;

a second heat insulating plate-5, a second groove-51, and a communication hole-52;

the mold comprises a mold cavity assembly-6, a mold cavity-61, a runner sleeve-62 and a diversion hole-621;

the upper plate-7, the feed inlet-711, the third groove-712 and the positioning groove-713;

middle plate-72;

lower plate-73, mounting hole-731, insert-732, boss-7321;

a lower lock plate-74;

cooling water device-8, cooling pipe-81.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, a cold runner injection mold structure for reducing waste comprises a pressing assembly 1 and a mold cavity assembly 6, wherein the pressing assembly 1 and the mold cavity assembly 61 are sequentially arranged from top to bottom;

a material groove plate 4 is arranged between the pressing component 1 and the die cavity component 6;

the upper end surface of the trough plate 4 is provided with a containing groove 41 for containing raw materials, wherein the inner bottom surface of the containing groove 41 is provided with a pouring hole 42 which enables the containing groove 41 to be communicated with the die cavity 61 in a penetrating way;

the pressing component 1 is provided with a pressing injection part 23 which is in plug-in fit with the accommodating groove 41;

the trough plate 4 is embedded with a cooling water device 8 for ensuring that the raw materials keep constant temperature.

In the injection molding process, the cooling water device 8 works to keep the temperature of the trough plate 4 constant, then the raw materials are placed in the accommodating groove 41, the raw materials are pressed into the accommodating groove 41 by the pressing injection part 23 of the pressing assembly 1 to be matched with the accommodating groove 41 in a matching way, the raw materials are extruded by the back pressing injection part 23, the extruded raw materials enter the die cavity 61 through the pouring hole 42 of the accommodating groove 41, the raw materials are filled in the die cavity 61, and thus a product is molded, wherein after the die cavity 61 is filled with the raw materials, the trough plate 4 is taken out from the position between the pressing assembly 1 and the die cavity assembly 6, and the trough plate 4 is taken out to be vulcanized on the die cavity assembly 6, so that the product is molded;

in the above working process, after the raw material is filled into the die cavity 61, the raw material still remains in the accommodating groove 41, so that the residual raw material can be continuously used, the material groove plate 4 is taken out before the raw material is vulcanized in the die cavity 61, the residual raw material is prevented from being vulcanized together with the raw material in the die cavity 61, and the residual raw material in the accommodating groove 41 is always kept at a constant temperature by arranging the cooling water device 8, so that the waste of the residual raw material can be avoided, the residual raw material can be continuously used, the cost can be effectively saved, and the waste can be avoided.

In the embodiment of the utility model, the pressing assembly 1 comprises an upper locking plate 2 and a pressing plate 22 which are arranged from top to bottom, and the pressing injection part 23 is arranged on the lower end surface of the pressing plate 22;

the die cavity assembly 6 comprises an upper plate 7, a middle plate 72, a lower plate 73 and a lower locking plate 74 which are sequentially arranged from top to bottom;

the trough plate 4 is arranged between the material pressing plate 22 and the upper plate 7, wherein a first heat insulation plate 3 is arranged between the material pressing plate 22 and the upper locking plate 2, the first heat insulation plate 3 is fixedly matched with the material pressing plate 22, a second heat insulation plate 5 is arranged between the trough plate 4 and the upper plate 7, and the trough plate 4 is fixedly matched with the second heat insulation plate 5;

the upper plate 7, the middle plate 72 and the lower plate 73 are respectively provided with a molding part, the mold cavity 61 is molded by the molding parts in the upper plate 7, the middle plate 72 and the lower plate 73, and the upper plate 7 is provided with a feeding port 711 penetrating through to enable raw materials to enter the mold cavity 61;

the second heat shield 5 is provided with a communication hole 52 penetrating the casting hole 42 and the cavity 61.

The material in the trough plate 4 is moved out, the raw materials in the die cavity 61 are vulcanized, the trough plate 4 continuously runs through the cooling water device 8, the raw materials in the trough plate 4 can be kept constant temperature all the time, wherein the injection part 23 of the material pressing plate 22 is matched with the accommodating groove 41 of the trough plate 4 in an inserting mode in the injection molding process, when the trough plate 4 is moved out, in order to avoid the temperature of the raw materials in the accommodating groove 41 to be contacted with the outside air so as to cause the raw materials to heat up, the material pressing plate 22 can be moved out together with the trough plate 4, the material pressing plate 22 moves out together with the trough plate 4, and then the first heat insulating plate 3 and the second heat insulating plate 5 respectively move out along with the material pressing plate 22 and the trough plate 4, at this moment, the first heat insulating plate 3, the material pressing plate 22, the trough plate 4 and the second heat insulating plate 5 are sequentially arranged from top to bottom, the temperature of the raw materials in the accommodating groove 41 can be effectively guaranteed to be always constant temperature, the raw materials can be further guaranteed to be continuously used, and accordingly the generation of waste materials can be further reduced, and the cost can be reduced.

In the embodiment of the present utility model, the cooling water device 8 includes a cooling pipe 81;

the plurality of pouring holes 42 are arranged, and the plurality of pouring holes 42 are respectively arranged at two sides of the cooling pipe 81 and are uniformly distributed along the length direction of the cooling pipe 81;

a plurality of the cooling pipes 81 are arranged in parallel in the trough plate 4.

The plurality of pouring holes 42 are respectively arranged on two sides of the cooling pipe 81 and are uniformly distributed along the length direction of the cooling pipe 81, so that the temperature of the residual raw materials in the pouring holes 42 can be effectively ensured to be kept constant while the constant temperature of the residual raw materials in the accommodating groove 41 can be ensured all the time, the problem that the quality of a formed product is unqualified due to the fact that the residual raw materials in the pouring holes 42 cannot be continuously used to form waste materials and scrapped raw materials enter the die cavity 61 is avoided, the constant temperature of the residual raw materials can be effectively ensured to be kept all the time, the production of the waste materials is reduced, and the production cost is saved.

In the embodiment of the utility model, a plurality of inserting holes 31 are uniformly formed on the upper end surface of the first heat insulation plate 3, and inserting posts 21 which are in one-to-one opposite inserting fit with the plurality of inserting holes 31 are formed on the lower end surface of the upper locking plate 2.

After the product vulcanization of moulding plastics before is accomplished, when needs are reset with first heat insulating board 3, pressure flitch 22, silo board 4 and second heat insulating board 5, peg graft the cooperation through spliced eye 31 on the first heat insulating board 3 and the spliced pole 21 of last lock plate 2, can be convenient for reset, and the in-process of pressing notes can guarantee that the relation of connection of last lock plate 2 and first heat insulating board 3 is stable, avoid going up lock plate 2 and first heat insulating board 3's relation of connection unstable and cause the pressure inequality when pressing notes and lead to the poor scheduling problem of product shaping effect, can also improve work efficiency in the time of effectively improving product quality.

The embodiment of the utility model further comprises a runner sleeve 62, wherein a diversion hole 621 is formed in the center of the runner sleeve 62, a first groove 43 is formed in the lower end face of the trough plate 4, a second groove 51 which is in alignment fit with the first groove 43 is formed in the upper end face of the second heat insulation plate 5, the runner sleeve 62 is in a T-shaped arrangement, wherein the outer wall of the lower end of the runner sleeve 62 is arranged along the inner wall of the communication hole 52, the upper end of the runner sleeve 62 is arranged in the first groove 43 and the second groove 51, and the outer wall of the upper end of the runner sleeve 62 is respectively in butt fit with the inner walls of the first groove 43 and the second groove 51;

the lower end of the runner sleeve 62 extends downwards, wherein a third groove 712 for accommodating the lower end of the runner sleeve 62 is formed in the upper end surface of the upper plate 7, the lower end of the runner sleeve 62 is in plug-in fit with the third groove 712, and the pouring hole 42 and the die cavity 61 are communicated through a diversion hole 621 in the runner sleeve 62;

the first groove 43 is arranged concentrically with the casting hole 42, the second groove 51 is arranged concentrically with the first groove 43, and the third groove 712 is arranged concentrically with the injection hole

In the working process of the utility model, when raw materials are extruded into the pouring hole 42, the raw materials flow into the pouring hole 42 along the flow guide hole 621, the first groove 43 and the pouring hole 42 are concentrically arranged to ensure that the raw materials can smoothly enter the flow guide hole 621, the third groove 712 and the injection hole are concentrically arranged to ensure that the raw materials can better enter the die cavity 61, wherein the runner sleeve 62 is arranged, the raw materials in the die cavity 61 are vulcanized, the second heat insulation plate 5 and the trough plate 4 are separated from the upper plate 7, the runner sleeve 62 is in a T-shaped arrangement, the runner sleeve 62 can be enabled to follow the two heat insulation plates and the trough plate 4 together to be separated from the upper plate 7, when the resetting work is required, the lower end of the runner sleeve 62 is downwards extended, the upper end surface of the upper plate 7 is provided with the third groove 712, the lower end of the runner sleeve 62 is in plug-in fit with the third groove 712, the runner sleeve 62 can have a positioning effect in the resetting process, the integral connection relation of the utility model is ensured, and the integral stability of the utility model is improved.

In one embodiment of the present utility model, since the material of the second heat insulation plate 5 is not suitable for the runner through which the molding material passes, by providing the runner cover 62, and providing the flow guide hole 621 in the runner cover 62, the material can be more smoothly introduced into the mold cavity 61 through the second heat insulation plate 5 by using the flow guide hole 621 in the runner cover 62 instead of the runner opened on the second heat insulation plate 5.

In one embodiment of the present utility model, after the first heat insulation board 3, the pressing board 22, the trough board 4 and the second heat insulation board 5 are removed, the plugging posts 21 of the upper lock board 2 can be plugged and matched with the third grooves 712, so that the mold cavity 61 is sealed, and better vulcanization work can be performed.

In one embodiment of the present utility model, when the mold cavity 61 needs to be sealed during vulcanization, a sealing plate may be disposed on the upper plate 7, and the sealing plate may be configured to be in plug-fit with the third groove 712, so that the sealing plate can better seal the mold cavity 61.

In the embodiment of the present utility model, a mounting hole 731 is formed on the lower end surface of the lower plate 73, an insert 732 is mounted in the mounting hole 731, and the insert 732 extends into the mold cavity 61 through the lower plate 73;

a positioning groove 713 is formed in the lower end face of the upper plate 7, and a protruding portion 7321 in plug-in fit with the positioning groove 713 is arranged at the upper end of the insert 732.

According to the chinese patent application No. CN201721266242.0, the length of the movable insert 732 is long, and in the injection molding process, the movable insert 732 is impacted by the injection molding hot fluid, and the top end of the movable insert 732 is eccentric, so that the wall thickness of the product groove is uneven, and the quality of the product is affected.

The injection molding product is a fine-hole rubber roller, and in the injection molding process, the insert 732 is eccentric due to overlarge pressure of raw materials, and the like.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The cold runner injection mold structure for reducing waste is characterized by comprising a pressing component and a mold cavity component, wherein the pressing component and the mold cavity component are sequentially arranged from top to bottom;

a material groove plate is arranged between the pressing component and the die cavity component;

the upper end face of the material tank plate is provided with a containing groove for containing raw materials, wherein the inner bottom surface of the containing groove is penetrated with a pouring hole for enabling the containing groove to be communicated with a die cavity;

the pressing component is provided with a pressing injection part which is in plug-in fit with the accommodating groove;

and a cooling water device for keeping the raw materials constant temperature is embedded in the trough plate.

2. The cold runner injection mold structure for reducing scrap as defined in claim 1, wherein said hold-down assembly comprises an upper lock plate and a hold-down plate arranged from top to bottom, said injection portion being provided on a lower end face of said hold-down plate;

the die cavity assembly comprises an upper plate, a middle plate, a lower plate and a lower locking plate which are sequentially arranged from top to bottom;

the trough plate is arranged between the material pressing plate and the upper plate, a first heat insulation plate is arranged between the material pressing plate and the upper locking plate, the first heat insulation plate is fixedly matched with the material pressing plate, a second heat insulation plate is arranged between the material trough plate and the upper plate, and the material trough plate is fixedly matched with the second heat insulation plate;

the upper plate, the middle plate and the lower plate are respectively provided with a forming part, the die cavity is formed by the forming parts in the upper plate, the middle plate and the lower plate, and the upper plate is provided with a feed inlet in a penetrating way, so that raw materials enter the die cavity;

wherein, run through on the second heat insulating board and be equipped with the intercommunicating pore that makes pouring hole and die cavity intercommunication setting.

3. The cold runner injection mold structure for reducing scrap in accordance with claim 2, wherein said cooling water means comprises a cooling pipe;

the plurality of pouring holes are respectively arranged at two sides of the cooling pipe and are uniformly distributed along the length direction of the cooling pipe;

the cooling pipes are arranged in the trough plate in parallel.

4. The cold runner injection mold structure for reducing waste materials as set forth in claim 3, wherein a plurality of insertion holes are uniformly formed in the upper end surface of the first heat insulating plate, and insertion posts in one-to-one insertion fit with the plurality of insertion holes are formed in the lower end surface of the upper locking plate.

5. The cold runner injection mold structure for reducing waste materials according to claim 4, further comprising a runner sleeve, wherein a diversion hole is formed in the center of the runner sleeve, a first groove is formed in the lower end face of the trough plate, a second groove which is in alignment fit with the first groove is formed in the upper end face of the second heat insulation plate, the runner sleeve is in a T-shaped arrangement, the outer wall of the lower end of the runner sleeve is arranged along the inner wall of the communication hole, the upper end of the runner sleeve is arranged in the first groove and the second groove, and the outer wall of the upper end of the runner sleeve is respectively in butt fit with the inner walls of the first groove and the second groove;

the lower end of the runner sleeve extends downwards, a third groove for accommodating the lower end of the runner sleeve is formed in the upper end face of the upper plate, the lower end of the runner sleeve is in plug fit with the third groove, and the pouring hole and the die cavity are communicated through a diversion hole in the runner sleeve;

the first groove is arranged concentrically with the casting hole, the second groove is arranged concentrically with the first groove, and the third groove is arranged concentrically with the injection hole.

6. The cold runner injection mold structure for reducing waste according to claim 5, wherein a mounting hole is formed in a lower end surface of the lower plate, an insert is mounted in the mounting hole, and the insert extends into the mold cavity through the lower plate;

the lower end face of the upper plate is provided with a positioning groove, and the upper end of the insert is provided with a protruding part which is in plug-in fit with the positioning groove.