CN219360139U - Loose-piece injection mold - Google Patents

Abstract

The application relates to a loose piece type injection mold, wherein a plurality of mold parts related to a cavity in the injection mold are provided with replaceable loose pieces in an even split mode, and each loose piece is provided with a cavity or a mandril arrangement area. The utility model expands the application range of the injection mould from original special property to all structures with universality and movable block area periphery, and does not need to repeatedly design, manufacture and manage for product transformation. The utility model is easy to meet the requirements of high efficiency and low investment expected in new product research and development, and is particularly suitable for the requirements of common multiple varieties and small batch states in modern industrial production.

Description

Loose-piece injection mold

Technical Field

The application relates to the fields of pressure casting, injection molding of plastic products, injection molding of metal powder and the like, in particular to a loose piece type injection mold.

Background

Currently, injection molds used in the relevant industry are typically designed and manufactured specifically for a particular part. Injection molds are complex in construction, high in input cost and long in manufacturing cycle, and their application range is limited to mass and large-scale part production. Thus, for new product parts, the option of injection molding with molds is often avoided if there is no defined batch requirement. In addition, the special injection mould has large integral size hinge, more parts needing to be replaced, large storage occupation space and relatively large maintenance and management difficulty.

Disclosure of Invention

To solve the above technical problems or at least partially solve the above technical problems, the present application provides a loose piece injection mold.

The application provides a loose piece type injection mold, a plurality of mold parts related to a cavity in the injection mold are evenly split and provided with replaceable loose pieces, and a cavity or a mandril arrangement area is arranged in each loose piece.

Optionally, each mold part is matched with a corresponding movable block through a stop buckle structure.

Optionally, the plurality of mold parts includes a fixed mold insert, a movable mold insert, and a ram securing plate.

Optionally, the fixed die insert is provided with a fixed die cavity loose piece in a split mode, the movable die insert is provided with a movable die cavity loose piece in a split mode, and the ejector rod fixing plate is provided with an ejector rod plate loose piece in a split mode.

Optionally, the fixed die cavity movable block and the movable die cavity movable block are provided with cavities for forming the shapes of the product parts; the ejector rod plate loose piece is provided with mounting holes of each ejector rod.

Optionally, the movable die sleeve plate loose piece is further provided with a sinking table for placing the whole plate of each ejector rod hanging cap to be communicated.

Optionally, the fixed die cavity movable block is embedded into the fixed die insert from one end of the bottom surface of the fixed die insert; the movable mould cavity movable block is embedded into the movable mould insert from one end of the bottom surface of the movable mould insert; the movable die sleeve plate loose piece is embedded into the movable die sleeve plate from one end of the concave cavity of the movable die sleeve plate;

the ejector rod plate movable block is embedded into the ejector rod fixing plate from one end of the push plate; the ejector rods are arranged in the corresponding mounting holes on the ejector rod plate loose pieces, the hanging caps of the ejector rods are reserved in the sinking table, and the ejector rods are used for connecting the ejector rod fixing plate and the push plate.

Optionally, each ejector rod passes through a step cavity on the driven die sleeve plate.

Optionally, the plurality of mold parts further comprise a movable die sleeve plate, and the movable die sleeve plate is provided with a movable die sleeve plate loose piece in a split manner.

Optionally, the movable die sleeve plate loose piece is provided with a penetrating hole, and a plurality of ejector rods of the ejector rods penetrate through the penetrating hole.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the application range of the injection mould is expanded from original specificity to all structures with universality and movable block area periphery, and repeated design, manufacture and management for product transformation are not needed. The utility model is easy to meet the requirements of high efficiency and low investment expected in new product research and development, and is particularly suitable for the requirements of common multiple varieties and small batch states in modern industrial production.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a cross-sectional view of a prior art injection mold;

FIG. 2 is a cross-sectional view of a loose piece mold provided by the present utility model;

FIG. 3 is a schematic view of a loose piece according to the present utility model;

FIG. 4 is a perspective view of a loose piece mold provided by the present utility model;

FIG. 5 is a schematic view of various cavity arrangement forms in the loose piece provided by the utility model;

FIG. 6 is a schematic view of a ejector pin plate block provided by the utility model;

fig. 7 is a schematic view of a movable die sleeve plate loose piece provided by the utility model.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present utility model, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.

Fig. 1 shows a conventional typical mold of a typical form used in industries related to pressure casting, injection molding of plastic products, injection molding of metal powder, etc., and the mold is complicated in construction and high in manufacturing cost. Each pair of dies is specially made for a certain (or several) determined product part. If the mold cavity is damaged and scrapped, at least the fixed mold insert 01 or the movable mold insert 02 needs to be replaced integrally. If one auxiliary mold frame is used for producing other product parts, the ejector rod fixing plate 03, the movable mold sleeve plate 04 and the like can be replaced integrally besides the fixed mold (or movable mold) insert, and the mold parts are provided with high-precision processing requirements such as guiding, positioning, connecting and fastening, so that the cost of implementing replacement is high, and few people use the movable mold sleeve plate. In practice, this form of mould is known to be suitable only for large-scale production types. In the figure, 05 is a fixed die sleeve plate, 06 is a push plate, and 07, 08 and 09 are ejector rods.

The movable block type injection mold provided by the utility model is characterized in that a mold part related to a cavity is provided with movable blocks which can be replaced according to different product part forms in a split mode, and the movable blocks are provided with a cavity or a mandril arrangement area which forms the product part form. Optionally, the plurality of mold parts includes a fixed mold insert 1, a movable mold insert 2, a ram fixing plate 3, and a movable mold sleeve plate 4. The movable blocks comprise a fixed die cavity movable block 5, a movable die cavity movable block 6, a movable die sleeve plate movable block 7 and a push rod plate movable block 8.

The utility model separately manufactures the movable block type regional modules by insert blocks, sleeve plates, ejector rod fixing plates and the like in injection (including die casting, injection molding and the like) moulds, so that different product parts can be produced on the same mould frame by changing the movable blocks.

The utility model expands the application range of the injection mould from original special property to all structures with universality and movable block area periphery, and does not need to repeatedly design, manufacture and manage for product transformation. The utility model is easy to meet the requirements of high efficiency and low investment expected in new product research and development, and is particularly suitable for the requirements of common multiple varieties and small batch states in modern industrial production. And the original basic constitution and the working efficiency of the injection mould are unchanged, and the original main characteristics are maintained.

On the basis of a typical injection mold (see fig. 1), mold parts such as an insert, a sleeve plate, a push rod fixing plate and the like are manufactured separately to form a movable block forming a cavity area, a stop buckle (also called a hanging table) structure is used for guaranteeing a basic matching relationship (see fig. 2), and the original structure of the mold is utilized to fulfill the working requirements of fastening, movement, filling and the like, so that the purpose that different product parts can be produced on the same mold frame is achieved.

In some embodiments, the utility model performs split manufacturing on the area provided with the cavity and the ejection arrangement area related to the area, and the split manufactured (loose piece) area and the matched mold part are positioned in a simple stop structure and other modes, so that the updating or the changing of the core area part of the mold can be convenient. By disassembling and assembling the cavity area in the injection mold, to facilitate the update or change.

As shown in fig. 3, the core component (loose piece) parts of the present utility model are a fixed mold cavity loose piece 5, a movable mold cavity loose piece 6, a push rod plate loose piece 7 and a movable mold sleeve plate loose piece 8 in this order according to the positions of the core component (loose piece) parts in the mold. Its basic appearance characteristics and its assembly orientation are determined by its function and assembly relationship on the mold. When the method is applied and implemented, the die cavities forming the shapes of the product parts are manufactured on the fixed die cavity movable block and the movable die cavity movable block, the mounting holes of the ejector rods 9 arranged on the ejector rod plate movable block are manufactured on the ejector rod plate movable block, and the penetrating holes for ensuring the smooth passing of the ejector rods are formed on the movable die sleeve plate movable block. The die part comprises a fixed die insert, a movable die sleeve plate and an ejector rod fixing plate. The mounting holes and the penetrating holes of the ejector rods form an ejector rod arrangement area.

In the utility model, the dividing is carried out not only on a fixed die (or a movable die) insert with a cavity, but also on a movable die sleeve plate and a mandril fixed plate which are related to the mandril arrangement area of the cavity. In order to ensure the determination of the relative positions of the relevant mould parts in the opening and closing and ejection directions, the partitioned area (namely the movable block) is matched with the periphery of the movable block, and a locking structure is designed, and the large end of the locking structure is positioned at one end capable of fixing the movable block according to the assembly relation.

Fig. 4 is a perspective view showing the assembled state of the core component (mold) part in the mold according to the present utility model. The movable die sleeve plate movable block 8 is embedded into the movable die sleeve plate from one end of the concave cavity of the movable die sleeve plate 4, and the fixed die (or movable die) insert is embedded into one end of the bottom surface of the fixed die insert 1 or the movable die insert 2 from the other end of the concave cavity of the fixed die cavity movable block 5 or the movable die cavity movable block 6. After the insert of the fixed mould (or the movable mould) with the movable mould cavity block of the fixed mould (or the movable mould) is placed into the concave cavity of the movable mould sleeve plate with the movable mould sleeve plate block, the insert is fastened by a screw 13. After the ejector rod fixing plate is embedded into one end of the ejector rod plate movable block, which is self-leaning towards the push plate, each ejector rod 9 used for the cavity area is arranged in a corresponding mounting hole on the ejector rod plate movable block, and the hanging cap of each ejector rod is left in a sinking table (also called a concave table) on the ejector rod plate movable block. All ejector rods penetrate through the movable die sleeve plate taking the movable die sleeve plate movable block as a core area, and after being inserted into the movable die insert taking the movable die cavity movable block as the core area, the ejector rod fixing plate and the push plate 10 are fastened by using screws 14. Then, the mould parts such as the push plate guide post and the like are inserted in place according to the original relation, the movable mould base plate 15 is closed, and the mould parts are fastened by the bolts 16. The fixed die and the movable die are guided and positioned by the guide post and the guide sleeve 17, so that the integral assembly of the die is completed.

After the whole die is assembled on the machine tool, in a closed state, the fluid injection material enters the die from a pore canal in the middle of the sprue bush 18 until the cavity is full, and is continuously pressed, and the injection material is cooled and solidified. One end of the fixed die is fastened with a fixed die mounting plate of the machine tool and can not move, and one end of the movable die is pulled by the movable die mounting plate to move towards one side of the movable die, so that the die is opened from a die parting surface where a fixed die sleeve plate (comprising a fixed die insert and the like) and the movable die sleeve plate (comprising a movable die insert and the like) are contacted. The injection material is prevented from being separated from the cavity in the mould, the technological characteristic requirement is that the resistance on the side of the movable mould is larger than that on the side of the fixed mould, so that the injection material in the mould is firstly separated from the fixed mould and then moves to a set position along with the movable mould to stop. The ejector device of the machine tool pushes the push plate 10 in time through the push rod 12 on the die to promote the ejector rod and the like to move towards one side of the fixed die, so that the injected product parts, the runner body and the like are ejected out of the die. When the movable mould is completely attached to the parting surface of the fixed mould, the front ends of the ejector rods in the cavity are just positioned at the bottom surface of the cavity, and the mould is ready for the reinjection process.

As shown in fig. 5, the present utility model may be applied to various practical requirements, such as producing a plurality of identical product parts or producing different product parts of the same material in the same mold. On the premise that the size space of the die is large enough and the capability of the pouring system is strong enough, the number of movable blocks on the die and the setting form of the movable blocks can be flexibly and variously changed according to the needs of users.

As shown in fig. 6, in order to respond to various changes on the ejector rod cloth required by different product parts, the structure of the mould parts is simplified, the processing operation is convenient, a sinking table 19 communicated with the whole plate is designed on the ejector rod plate loose piece in a space area where the ejector rod hanging cap is possibly placed, and only one positioning through hole is required to be drilled at the position of each ejector rod, so that the positioning counter bores are not required to be manufactured one by one for the ejector rod hanging cap.

As shown in fig. 7, the mold cavity of some product parts is specially configured, multiple ejector pins with close arrangement distance may be required in a local area or the whole cavity area, so that the ejector pin through holes required to be made on the movable die sleeve plate loose piece are dense and thin at intervals, and the ejector pins directly penetrate through the step cavity on the movable die sleeve plate instead of combining the dense holes to make large penetrating holes (through holes) 20, or removing the movable die sleeve plate loose piece.

-the course of action and principle of the utility model:

after the mold frame suitable for a certain range (size and the like) is determined, core mold parts of all product parts of the mold frame are to be adopted to form respective identical stop button-shaped bodies, wherein the core mold parts mainly comprise a fixed mold cavity movable block, a movable mold sleeve plate movable block, a mandril plate movable block and the like (see figure 3).

The method comprises the steps of manufacturing a cavity for forming a product part on a fixed mold cavity movable block and a movable mold cavity movable block, accurately positioning the fixed mold (or movable mold) cavity movable block on a fixed mold (or movable mold) insert by means of a stop-buckle relationship, loading the movable mold sleeve plate movable block into a step hole at the bottom of a movable mold sleeve plate by means of the stop-buckle relationship, embedding the fixed mold (or movable mold) insert into a fixed mold (or movable mold) sleeve plate cavity, and fastening by means of screws to fix the mold parts. After the ejector rod plate movable blocks are installed into the ejector rod fixing plate in a locking relation, all ejector rods distributed in the cavity area are positioned in each installation hole on the ejector rod plate movable blocks, pass through the through holes in the movable mold cavity movable blocks and are inserted into the movable mold cavity movable blocks to the bottom surface of the cavity. The ejector rod fixing plate and the push plate are also fastened by screws, so that the ejector rod plate loose piece can be fixed inside at the same time. The gate on the movable block of the fixed die (or movable die) cavity is communicated with the general gate on the insert of the fixed die (or movable die). The composition and assembly of the other mold parts, and their movement relative to each other, are the same as in the conventional state of such molds (see fig. 4).

When the die mechanism is used, corresponding screws are unscrewed successively, die parts such as the ejector rod plate movable block, the ejector rods in the cavity area, the movable die sleeve plate movable block, the movable die, the fixed die cavity movable block (containing a core) and the like are respectively replaced at the position shown in fig. 2, and the assembly is completed according to the relevant sequence, so that the machine tool can be turned on for debugging production.

It is worth noting that:

the fixed die (or movable die) cavity movable block is not limited to only one die, but also is not limited to the cavity movable block only for installing the same product part on the same pair of dies. As long as the mould specification space is enough, the using unit can flexibly layout the setting state of the cavity movable block according to the production characteristics and the requirements thereof (see figure 5), and as long as the materials of the parts of the product to be produced are consistent and the shapes are similar, the conditions of a pouring system of the mould and the like can meet the actual requirements. And in the same way, the setting of the ejector rod plate loose piece can be flexibly processed.

On the ejector rod plate movable block, all single counter bores limiting the axial position of the ejector rod are combined and designed into a communicated sinking platform with uniform depth, and only mounting holes limiting the radial position of the ejector rod are needed to be punched at specific needed positions (see figure 6). Compared with the old state, the new state has the advantages of simple structure, good spacing consistency and more convenient assembly operation.

The distribution of the ejector pin through holes on the movable die sleeve plate movable block is very tight, and a plurality of smaller ejector pin through holes can be combined to form larger through holes (see figure 7). As long as the stress intensity of the movable die sleeve plate and the movable die insert of the die is enough during working, the stability of each ejector rod is guaranteed to be good, and movable die sleeve plate loose pieces on some dies can be omitted.

The utility model has the technical effects that:

1. the amount of the mold corresponding to the single product is reduced. When the external dimensions, structural characteristics, mass and the like of the specific product parts to be produced are basically similar, the same auxiliary die carrier can be used together, the assembly relation between the die and the machine tool does not need to be specially verified, the ejection mechanism is basically unchanged, the main runner is ready, and only the cavity area for forming the product parts and related special parts are required to be correspondingly designed and manufactured.

2. When the die cavity of the same product part cannot be used due to internal damage and the like, the whole die or the whole fixed die (or moving die) insert is not required to be replaced, and only the movable block of the fixed die (or moving die) cavity is required to be replaced, so that the cost for the purpose is low, the time is less, and the operation is simple.

3. The preparation period of new product input production is shortened, and the early input cost is reduced. The peripheral universal die carrier is ready to use, the proportion of the special die parts related to the cavity area relative to the whole die is small, the assembly relation is simple, the number of die parts corresponding to specific product parts is small, and the workload of design, manufacture and effect verification is greatly reduced.

4. The application range of the die is enlarged. The main body of the die has general properties, the matching relation between the cavity area and the periphery is simple and easy to replace and operate, the product can be quickly changed and produced according to the change of the product demand in production, the applicable type of production has the possibility of being applicable to small batches and multiple varieties, and the break-through of convenience in developing new products and the like is realized.

5. The requirement on the storage space of the die is reduced, and the difficulty of maintenance and management is reduced. Because the universal die carrier is not manufactured frequently any more, the total quantity of the die is much less, the storage space requirement is low, the maintenance workload is little, the operation of directly penetrating into the core component is convenient, and the die management is much simpler.

6. The traditional advantages of the mould are preserved. The functional structure of the mold is not changed, the basic working efficiency is still maintained, and the injection mold has good product consistency, high production efficiency and characteristics suitable for mass production of products.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims (4)

1. The movable block type injection mold is characterized in that a plurality of mold parts related to a cavity in the injection mold are provided with replaceable movable blocks in a split mode, and each movable block is provided with a cavity or a mandril arrangement area; each mould part is matched with the corresponding movable block through a stop buckle structure;

the plurality of die parts comprise a fixed die insert, a movable die insert and an ejector rod fixing plate;

the fixed die insert is provided with a fixed die cavity movable block in a split mode, the movable die insert is provided with a movable die cavity movable block in a split mode, and the ejector rod fixing plate is provided with an ejector rod plate movable block in a split mode;

the fixed die cavity movable block and the movable die cavity movable block are provided with cavities forming the shapes of product parts; the ejector rod plate loose piece is provided with mounting holes of all ejector rods;

the movable die sleeve plate loose piece is further provided with a sinking table communicated with the whole plate for placing each ejector rod hanging cap;

the fixed die cavity movable block is embedded into the fixed die insert from one end of the bottom surface of the fixed die insert; the movable mould cavity movable block is embedded into the movable mould insert from one end of the bottom surface of the movable mould insert; the movable die sleeve plate loose piece is embedded into the movable die sleeve plate from one end of the concave cavity of the movable die sleeve plate;

the ejector rod plate movable block is embedded into the ejector rod fixing plate from one end of the push plate; the ejector rods are arranged in the corresponding mounting holes on the ejector rod plate loose pieces, the hanging caps of the ejector rods are reserved in the sinking table, and the ejector rods are used for connecting the ejector rod fixing plate and the push plate.

2. The loose-piece injection mold of claim 1, wherein each ram passes through a stepped cavity in the driven mold plate.

3. The segmented injection mold of claim 2, wherein the plurality of mold parts further comprises a movable die plate, the movable die plate being provided with a movable die plate segment.

4. A loose piece injection mold according to claim 3, wherein the movable die sleeve plate loose piece is provided with a penetration hole through which a plurality of ejector pins of the respective ejector pins are penetrated.