CN219360128U

CN219360128U - Device for eliminating flash of injection molding product by using elastic insert

Info

Publication number: CN219360128U
Application number: CN202222101495.XU
Authority: CN
Inventors: 姚俊杰; 徐龙; 金建
Original assignee: Interplex Electronics Hangzhou Co Ltd
Current assignee: Yinawei Hangzhou Intelligent Technology Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-07-18
Anticipated expiration: 2032-08-11

Abstract

The utility model discloses a device for eliminating flash of an injection molding product by utilizing an elastic insert, which comprises an injection molding frame, a pair of mold base plates and templates which are arranged in parallel up and down, a runner penetrating through the upper half part of the injection molding frame, a runner thimble penetrating through the lower half part of the injection molding frame, a product thimble propping against the runner and a product thimble propping against the product, and a bolt fixing the mold base plates and the templates; an upper die fixing insert mounted in an upper die plate of the die plate; the lower die spring pin is arranged in a lower die plate in the die plate, and a gap of 0.1mm is reserved between the upper die fixing insert and the lower die spring pin after die assembly; the elastic insert is sleeved at the lower part of the lower die spring needle. The utility model reduces the mould precision by using the elastic insert, reduces the mould cost, avoids the manual removal of burrs, reduces the product cost, reduces the mould maintenance frequency, does not generate burrs, improves the product yield and increases the production profit.

Description

Device for eliminating flash of injection molding product by using elastic insert

Technical Field

The utility model relates to the technical field of plastic molding equipment, in particular to a device for eliminating flash of an injection molding product by using an elastic insert.

Background

The plastic mould is a tool matched with a plastic forming machine in the plastic processing industry to endow plastic products with complete configuration and accurate size, and has application range from upstream raw and auxiliary material industry and processing and detecting equipment to downstream machine, automobile, motorcycle, household appliance, electronic communication, building material and other large application industries, and the plastic mould develops a green machine. For some devices with larger precision requirements, the required flash of the product functional area is less than 0.02mm, however, when the PPS plastic material is used for injection molding, the flash phenomenon is easy to occur, and the existing method for treating the flash condition comprises the following steps: the method has the advantages that the subsequent procedures of removing burrs are added, the precision of the insert is controlled to +/-0.002 mm, and the like, so that on one hand, the production cost is increased, the production efficiency is reduced, on the other hand, the requirement on the machining precision of the die part is high, the die is required to be frequently maintained, the cost is extremely high, and therefore, the method is required to be capable of reducing the cost while guaranteeing the production efficiency, and is easy to popularize.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The present utility model has been made in view of the above-described problems with the existing plastic molding apparatuses.

Therefore, the technical problems solved by the utility model are as follows: the die part machining precision is high, the product flash condition needs to be treated later, the production cost is increased, and the production efficiency is reduced.

In order to solve the technical problems, the utility model provides the following technical scheme: the device comprises an injection mold frame, a pair of mold base plates and templates which are arranged in parallel up and down, a runner penetrating through the upper half part of the injection mold frame, a runner thimble penetrating through the lower half part of the injection mold frame, a product thimble propping against the runner and a product thimble of a product, and a bolt fixing the mold base plates and the templates, wherein the runner thimble is arranged on the upper half part of the injection mold frame; an upper die fixing insert mounted in an upper die plate of the die plate; the lower die spring pin is arranged in a lower die plate in the die plate, and a gap of 0.1mm is reserved between the upper die fixing insert and the lower die spring pin after die assembly; and the spring is sleeved at the lower part of the lower die spring needle.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: the spring force of the spring is larger than the injection molding pressure born by the upper surface of the elastic needle of the lower die.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: the lower end of the lower die spring pin is spaced 0.5mm from the lower die cushion plate in the die cushion plates.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: the elastic insert can close the gap between the upper die fixing insert and the lower die elastic needle to be 0 by the elastic force of the elastic insert.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: the resilient insert may use a spring.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: and the upper die fixing insert and the lower die elastic needle are made of rigid materials.

As a preferable scheme of the device for eliminating flash of injection molding products by using the elastic insert, the utility model comprises the following steps: the injection molding product material is PPS plastic.

The utility model has the beneficial effects that:

(1) After die assembly, a gap of 0.1mm is reserved in the middle of the insert, so that interference damage of the insert is avoided;

(2) The elastic insert is added into the die, the injection molding pressure is overcome by using the elastic force to finish the sealing, the steel material at the sealing position is not damaged due to smaller spring force, frequent insert replacement maintenance is avoided, the cost is reduced, and the sealing state of the closed position is not required to be ensured by the elastic force through the processing precision, so that the precision of the die is reduced;

(3) The elastic force of the elastic inserts is utilized, so that the gap between the inserts is 0, the generation of flash is avoided, the subsequent treatment of the flash is not needed, and the product cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic structural view of an apparatus for removing flash from an injection molded product using an elastic insert according to a first embodiment of the present utility model.

The components of the drawings are marked as follows:

100-injection mold frames; 110-a die pad; 120-templates; 130-flow channel; 140-runner thimble; 150-product thimble; 160-bolts; 111-an upper die pad; 112-a lower die pad; 121-an upper template; 122-lower template;

200-fixing the insert by an upper die;

300-lower die spring pin;

400-resilient insert.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present utility model can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

While the embodiments of the present utility model have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Also in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it is also possible to use mechanical, electrical or direct connections, or indirect connections via intermediaries, or internal connections between two elements, as would be understood by those skilled in the art.

Referring to fig. 1, in order to provide an embodiment of the present utility model, the device for eliminating flash of an injection molding product by using an elastic insert is provided, and by adding the elastic insert into a plastic mold, flash of the injection molding product is avoided, and the requirement on precision of parts is not high, so that the production cost is reduced.

A device for eliminating flash of injection molding products by utilizing an elastic insert comprises an injection mold frame, an upper mold fixing insert, a lower mold elastic needle and the elastic insert.

Specifically, the injection mold frame comprises a mold base plate, a mold plate, a runner, runner ejector pins, product ejector pins and bolts, wherein the mold base plate and the mold plate are two and are respectively arranged in parallel up and down, the upper half part is provided with an upper mold base plate 111 and an upper mold plate 121, the lower half part is provided with a lower mold base plate 112 and a lower mold plate 122, the runner passes through the upper mold base plate 111 and the upper mold plate 121, unshaped materials flow into a mold through the runner 130 to realize molding in the mold, the runner ejector pins and the product ejector pins pass through the lower mold base plate 112 and the lower mold plate 122 to respectively prop against the runner 130 and a molded product, the positions of the runner ejector pins and the mold plates are fixed, and the bolts are used for fixing the mold base plate and the mold plate to realize the installation of the whole mold; an upper die fixing insert mounted in an upper die plate of the die plate; the lower die spring needle is arranged in a lower die plate in the die plate, a gap of 0.1mm is reserved between the upper die fixing insert and the lower die spring needle after die assembly, and the upper die fixing insert and the lower die spring needle are closed and inlaid in an irregular part of the die to ensure that the die structure meets the production requirement; the elastic insert is sleeved at the lower part of the lower die elastic needle, and the gap between the upper die fixing insert and the lower die elastic needle is reduced to 0 by utilizing elasticity.

Further, the elastic force of the elastic insert is larger than the injection molding pressure born by the upper surface of the elastic needle of the lower die, so that the interference phenomenon caused by the fact that the pressure of the upper die fixing insert to the elastic needle of the lower die is too large is avoided, and damage is caused to parts.

Optionally, the lower end of the lower die spring pin is spaced from the lower die pad plate of the die pad plates by 0.5mm, so that the lower die spring pin 300 is prevented from being damaged due to overpressure during die assembly.

Optionally, the elastic force of the elastic insert can close a gap between the upper die fixing insert and the lower die elastic needle to be 0.

Furthermore, the elastic insert can use a spring, the effect is achieved by utilizing the elasticity of the spring, in addition, the spring is more in size variety, and the requirements of different sizes can be met.

Optionally, the upper die fixing insert and the lower die elastic needle are made of rigid materials, so that the application range is wide, and the die is suitable for different processing conditions.

Optionally, the material of the injection molding product is PPS plastic.

During process production, the product functional area generally requires flash to be smaller than 0.02mm, when the clearance of the PPS material in the insert is 0.005mm, 0.1mm flash can be generated, therefore, the traditional method requires precision control of the insert to be +/-0.002 mm, if the precision is minus 0.002mm, the interference of the insert can be generated, namely, the upper die fixing insert and the lower die elastic needle are mutually extruded, damage to parts can be caused, the internal parts of the die are required to be maintained frequently, the spring insert 400 is added at the lower part of the lower die elastic needle, the clearance of 0.1mm is reserved between the upper die fixing insert and the lower die elastic needle, on one hand, the precision requirement is reduced, on the other hand, the distance between the upper die fixing insert and the lower die elastic needle is reduced to 0 by utilizing spring force, and when the mold is closed, the injection pressure is relieved by the spring force, the interference phenomenon can be avoided, and therefore frequent maintenance and maintenance of the die are not required, and the production cost is reduced.

According to the device for eliminating the flash of the injection molding product by using the elastic insert, the working principle is as follows: the injection mold frame 100 is constructed, the upper mold cushion plate 111 and the lower mold cushion plate 112 are installed on the outermost layer, the upper mold plate 121 and the lower mold plate 122 are installed on the inner layer of the mold cushion plate 110, a product cavity is reserved in the upper mold plate and the lower mold plate, the runner 130 introduces materials into the product cavity through the upper mold cushion plate 111 and the upper mold plate 121 to realize the injection molding process of the product, in the process, a gap of 0.1mm is reserved between the upper mold fixing insert 200 and the lower mold spring needle 300, the elastic insert 400 is installed on the lower portion of the lower mold spring needle 300, the gap between the upper mold fixing insert 200 and the lower mold spring needle 300 is shortened to 0 by utilizing elasticity, in the injection molding process, the injection molding pressure enables the upper mold fixing insert 200 and the lower mold spring needle 300 to mutually press, at the moment, the elastic insert 400 relieves the pressure between the upper mold fixing insert and the lower mold spring needle, and keeps the gap of 0, and the product flash phenomenon can not be generated when the gap is 0, therefore, secondary treatment of the product is not needed, internal parts of the mold are not needed, the die is easy to be reduced, the number of maintenance of the mold is reduced, the production cost is reduced, and the gap is reduced by plus or minus 0.002mm, compared with the traditional operation, and the required accuracy is reduced by the clearance of the conventional operation.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims

1. The utility model provides an utilize elasticity mold insert to eliminate injection molding product overlap device which characterized in that: the injection molding machine comprises an injection molding frame (100), a pair of die base plates (110) and templates (120) which are arranged in parallel up and down, a runner (130) penetrating through the upper half part of the injection molding frame (100), a runner thimble (140) penetrating through the lower half part of the injection molding frame (100) and propping against the runner (130), a product thimble (150) propping against a product, and bolts (160) for fixing the die base plates (110) and the templates (120);

an upper die fixing insert (200) mounted in an upper die plate (121) of the die plates (120);

a lower die spring pin (300) which is arranged in a lower die plate (122) in the die plate (120), wherein a gap of 0.1mm is reserved between the upper die fixing insert (200) and the lower die spring pin (300) after die assembly;

and the elastic insert (400) is sleeved at the lower part of the lower die spring needle (300).

2. The injection molded product flash removal apparatus utilizing an elastomeric insert as defined in claim 1, wherein: the elastic force of the elastic insert (400) is larger than the injection molding pressure born by the upper surface of the lower die elastic needle (300).

3. The injection molded product flash removal apparatus utilizing an elastomeric insert as claimed in claim 2, wherein: the lower end of the lower die spring pin (300) is spaced 0.5mm from the lower die pad plate (112) in the die pad plate (110).

4. The injection molding product flash removal device using an elastic insert according to claim 1 or 2, wherein: the elastic force of the elastic insert (400) can close the gap between the upper die fixing insert (200) and the lower die elastic needle (300) to be 0.

5. The injection molded product flash removal apparatus utilizing an elastomeric insert as claimed in claim 4, wherein: the resilient insert (400) may use a spring.

6. A device for eliminating flash of injection molded products using an elastic insert as defined in any one of claims 1 to 3, wherein: the upper die fixing insert (200) and the lower die spring pin (300) are made of rigid materials.

7. The injection molded product flash removal apparatus utilizing an elastomeric insert as defined in claim 6, wherein: the injection molding product material is PPS plastic.