CN208305670U

CN208305670U - Mold is used in BMC injection molding

Info

Publication number: CN208305670U
Application number: CN201820173657.1U
Authority: CN
Inventors: 李明; 刘俊麟; 苗蓓蕾; 马婷婷
Original assignee: HASCO Vision Technology Co Ltd
Current assignee: HASCO Vision Technology Co Ltd
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2019-01-01
Anticipated expiration: 2028-02-01

Abstract

The utility model relates to a kind of BMC injection molding molds, including die ontology and gating insert, the gating insert is removably secured in the groove being mounted at the cast gate of the die ontology, and the exposed surface of the gating insert constitutes the cast gate working surface of the mold under installation condition.The hardness of the gating insert is HRC50-52.The utility model can be by the gating insert that directly more renews, mold can be made to put into production again in a short period of time, improve production stability, by using the gating insert of more high rigidity, the abrasion condition that can be obviously improved at mould gate postpones the replacing construction of gating insert, and the hardness without improving die ontology, do not increase cost, also reduction crack of die risk.

Description

Mold is used in BMC injection molding

Technical field

The utility model relates to a kind of mould structures suitable for BMC plastic products injection molding, can be used for car light part Injection molding.

Background technique

BMC material is the abbreviation of Bulk molding compounds, i.e. tubular molding compound, and the country is commonly referred to as unsaturated poly- Ester bulk the modern designs of plastics have good physical property, electrical property and mechanical property.BMC injection mould and common thermoplasticity, thermosetting The injection molding of property is somewhat different, and the mainly shrinking percentage of BMC is lower, only one thousandth.

BMC material has relatively high hardness due to containing glass ingredient, material itself.Mold into pour place due to always with production Product rub, and wear frequent occurrence, and re-work after wearing with regard to that need to freeze, therefore especially influence normal production.

But if the steel hardness risk that then mold cracks for improving unitary mould obviously becomes larger again.

Summary of the invention

The utility model is intended to provide a kind of BMC injection molding mold, and long service life influences normal productive temp It is small.

The main technical schemes of the utility model have:

A kind of BMC injection molding mold, including die ontology and gating insert, the gating insert are removably secured installation In the groove at the cast gate of the die ontology, the exposed surface of the gating insert constitutes pouring for the mold under installation condition Mouth working surface.

The hardness of the gating insert is preferably HRC50-52.

The hardness of the die ontology is HRC48-50.

The gating insert edge fits in the die ontology, and fit clearance is preferably controlled within 0-0.02mm.

Under molding state, the working surface complete cycle of each cast gate of the mold by the gating insert exposed surface group It closes.

The plug installation direction of the relatively described groove of the gating insert and the draft direction of the mold be not straight at one On line.

The beneficial effects of the utility model are:

Due to being arranged to the insert structure seperated with die ontology at cast gate, abrasion to a certain extent, can be at cast gate The gating insert directly more renewed, can make mold put into production again in a short period of time, reduce mold because repairing, safeguarding Waiting time, improve production stability.

The hardness of injected plastics material, using the insert of more high rigidity, the mill that is on the one hand obviously improved at mould gate can be directed to Situation is damaged, the service life of gating insert is improved, postpones the replacing construction of gating insert, on the other hand without improving die ontology Hardness, do not increase cost, also reduction crack of die risk, extend the service life of mold.

Detailed description of the invention

Fig. 1 is the schematic perspective view of one embodiment of the utility model；

Fig. 2 is the draft direction schematic diagram of embodiment illustrated in fig. 1；

Fig. 3 is the cast gate module installation direction schematic diagram of embodiment illustrated in fig. 1.

Specific embodiment

The utility model discloses a kind of BMC injection molding mold, including die ontology and gating insert 1, the cast gate edge Block is removably secured in the groove being mounted at the cast gate of the die ontology, and the gating insert is exposed under installation condition Surface constitutes the cast gate working surface of the mold.

For Fig. 1 by taking dynamic model as an example, 2 in figure be moving die insert, is to be related to a part at cast gate position on die ontology, can The die ontology is represented, to illustrate the installation relation between die ontology and gating insert.When gating insert may wear to centainly Degree can unload old gating insert, and the gating insert directly more renewed can make cast gate position extensive in a short period of time The state of multiple design requirement, makes mold rapidly put into production again, reduce traditional moulds because freeze etc. maintenance, maintenance waiting when Between, improve production stability.

It can be directed to the hardness of injected plastics material, using the insert of more high rigidity, such as gating insert described in the present embodiment Hardness is increased to HRC50-52, is higher by the die ontology (hardness of die ontology is usually HRC48-50).It on the one hand can be bright The aobvious abrasion condition improved at mould gate, improves the service life of gating insert, postpones the replacing construction of gating insert, another Aspect is not necessarily to improve the hardness of die ontology, therefore does not increase cost, also reduction crack of die risk, and extend mold uses the longevity Life.

The gating insert can be inlayed by screw with being fixed in the die ontology, and the fit clearance between the two is preferred Control is within 0-0.02mm, to prevent flash.

The exposed surface of the gating insert wants the working surface of fully wrapped around cast gate.When the working surface of a cast gate relates to And several component parts to die ontology, corresponding position is designed with the gating insert on the die ontology of each part, The moulding of the exposed surface of certain each gating insert often will be different according to the position respectively installed.Molding state Under, the working surface complete cycle of each cast gate of the mold is composed of the exposed surface of the gating insert.

Along stream flow trace direction, the exposed surface of the gating insert need not cover entire runner, usually only cover Cast gate oral area.

No matter which kind of above-mentioned BMC, which is molded, is used mold, the plug installation direction of the relatively described groove of the gating insert and institute It states the draft direction of mold not point-blank, can effectively avoid gating insert from deviating from mould due to the effect by knockout press Tool.Direction shown in arrow is draft direction in Fig. 2, and direction shown in arrow is the installation of gating insert opposing mold ontology in Fig. 3 Direction.There are certain angled relationships between the two directions.

The gating insert of same position can make spare part, be convenient for changing, to improve mold repair efficiency, to mention High efficiency.

Claims

1. a kind of BMC injection molding mold, it is characterised in that: including die ontology and gating insert, the gating insert is detachable Ground is fixedly mounted in the groove at the cast gate of the die ontology, and the exposed surface of the gating insert is constituted under installation condition The cast gate working surface of the mold, the hardness of the gating insert are higher by the die ontology, and the gating insert is relatively described The draft direction of the plug installation direction of groove and the mold is not point-blank.

2. BMC injection molding mold as described in claim 1, it is characterised in that: the hardness of the gating insert is HRC50-52.

3. BMC injection molding mold as claimed in claim 2, it is characterised in that: the hardness of the die ontology is HRC48-50.

4. BMC injection molding mold as described in claim 1, it is characterised in that: the gating insert edge fits over the mold sheet In vivo, fit clearance is within 0-0.02mm.

5. BMC injection molding mold as described in claim 1, it is characterised in that: under molding state, each cast gate of the mold Working surface complete cycle is composed of the exposed surface of the gating insert.