CN2863436Y

CN2863436Y - Spring type hot mouth for thermal flow path mould

Info

Publication number: CN2863436Y
Application number: CN 200520119567
Authority: CN
Inventors: 李象烈
Original assignee: SINO MOULD COMPONENT (DONGGUAN) CO Ltd
Current assignee: SINO MOULD COMPONENT (DONGGUAN) CO Ltd
Priority date: 2005-11-28
Filing date: 2005-11-28
Publication date: 2007-01-31
Anticipated expiration: 2015-11-28

Abstract

The utility model relates to the hot runner equipment and technology, in particular to a spring-mouth of the hot runner mold with a stopped-flow function. The thermal mouth consists of the flow passage body, debeaking fixed at the end of the flow passage body and the heating device fixed outside the flow passage body. A spring cushion which can block up the debeaking port is installed. In this structure with a spring cushion on the debeaking, in normal state, the spring cushion can prevent the raw materials flowing out of the debeaking port. In injection molding, the raw materials has a downward pressure which compresses the spring cushion, so a gap is formed between the thermal mouth and the spring cushion through which raw materials flow out. After the injection molding operation, the pressure disappears. The spring cushion reinstates. The hot mouth port is blocked again. Then the raw materials can not flow out of flow passage when the finished products are removed.

Description

The hot mouth of the spring of hot runner mould

Technical field:

The utility model relates to the hot flow path mechanical equipment technical field, refers in particular to a kind of hot mouth of spring with hot runner mould of fluid stopping effect.

Background technology:

Hot runner mould is a kind of injection molding mould at present commonly used, and it is with respect to the mould of cold runner structure, has to economize in raw materials, and can enhance productivity, and improves product quality, simplifies plurality of advantages such as product subsequent handling.Though hot runner mould has above-mentioned plurality of advantages, also there is certain deficiency in it.For example, the hot mouth of present hot runner mould comprises the runner body, is arranged at the sharp-tongued of runner body flow field end, and plastic material flows in the die cavity of formed product mould by cast gate by runner body, sharp-tongued outflow again, is shaped to product.The existing a kind of deficiency of this hot mouth structure is exactly: the runner of runner body, sharp-tongued interior passage and gate channel are in conducting state always.When like this injection molding operation being finished, when product was taken out by mould, because the viscosity of plastic material, the product of moulding can be taken part material out of, formed waste material, not only caused the waste of raw material, and influenced operation.

The utility model content:

Technical problem to be solved in the utility model overcomes the shortcoming of present product exactly, and a kind of hot mouth of spring with hot runner mould of fluid stopping effect is provided, and cuts off runner and outside port with the back that finishes in injection moulding, guarantees that the raw material in the runner can not taken out of.

For solving the problems of the technologies described above, the utility model has adopted following technical scheme: the heater that this hot mouth comprises the runner body, is arranged at the sharp-tongued of runner body tip and is arranged at the runner body exterior, described sharp-tongued place is provided with a spring shim that can stop up sharp-tongued port.

Form runner in the middle of the described runner body, form ccontaining sharp-tongued cavity in the end of runner.

The cavity of described runner body tip below is provided with cast gate department, in the top insertion cavity of this cast gate department, spring shim cast gate department and sharp-tongued between, whether the conducting of and cast gate department sharp-tongued by the compression control of spring shim to be.

After the utility model adopted said structure, it was provided with a spring shim at sharp-tongued place, and under the normality, spring shim stops up sharp-tongued port, prevented that the raw material in the runner from taking out of; When injection moulding, raw material can produce downward pressure, thereby the compression spring shim makes between itself and the hot mouth and forms certain interval, thereby makes raw material flow out along this gap.After injection molding operation was finished, pressure disappeared, the spring shim reinstatement, and hot mouth port is blocked once more.Just can't take raw material runner in when taking out shaped article again this moment.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is an internal structure cutaway view of the present utility model.

The specific embodiment:

See Fig. 1, the utility model comprises: runner body 1, sharp-tongued 2, heater 3, spring shim 4 and cast gate department 5.Form a runner 10 in the runner body 1, its outer setting has heater 3, to offer the enough heats of runner body 1, makes the plastic material in the runner body 1 remain on molten condition.Heater 3 generally comprises sleeve pipe 31 and the heater 32 between sleeve pipe 31 and runner body 1.The end of runner 10 forms a cavity 11, sharp-tongued 2 and spring shim 4 all be positioned at the end cavity 11 of this runner 10, and offer some ports 21 in sharp-tongued 2, this port 21 is communicated with runner 10.

Spring shim 4 sharp-tongued 2 and cast gate department 5 between, lean on end faces that form in the cast gate department 5 and make it press on sharp-tongued 2, with sharp-tongued 2 port 21 obstructions.Tool offers conical through-hole 41 in the middle of the spring shim 4, stretches into wherein to make conus portion outstanding in the middle of sharp-tongued 2.Spring shim 4 can adopt spring steel to make, and offers some transverse grooves thereon, has compression stroke to make spring shim 4, forms a kind of pad with spring leaf character.

Cast gate department 5 is for accepting the parts between hot mouth and the mould die cavity.Insert in the cavity 11 on the top of this cast gate department 5, and fixing with runner body 1.Spring shim 4 is between cast gate department 5 and sharp-tongued 2, and the through holes of being offered in the middle of the spring shim 4 41 just in time are communicated with cast gate department 5 interior passage 51.

In the utility model use, under normality, spring shim 4 by self elastic force will sharp-tongued 2 port 21 stop up, prevent that runner 10 interior raw materials from being taken out of; When injection moulding, raw material can produce downward pressure, thereby compression spring shim 4 makes between itself and the hot mouth 2 and forms certain interval, thereby makes raw material flow out along this gap.After injection molding operation was finished, the pressure that raw material produces disappeared, spring shim 4 reinstatements, and the port 21 of hot mouth 2 is blocked once more.Just the raw material in the runner 10 can't be taken out of when take out shaped article this moment again.

Certainly, the above only is example of the utility model, be not to limit the utility model practical range, all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.

Claims

1, the hot mouth of the spring of hot runner mould, comprise: runner body (1), to be arranged at runner body (1) terminal and with sharp-tongued (2) of runner body (1) conducting and be arranged at runner body (1) external heated device (3), it is characterized in that: described sharp-tongued (2) locate to be provided with a spring shim (4) that can stop up sharp-tongued (2) ports (21).

2, the hot mouth of the spring of hot runner mould according to claim 1 is characterized in that: form runner (10) in the middle of the described runner body (1), form the cavity (11) of ccontaining sharp-tongued (2) in the end of runner (10).

3, the hot mouth of the spring of hot runner mould according to claim 2, it is characterized in that: terminal cavity (11) below of described runner body (1) is provided with cast gate department (5), insert in the cavity (11) on the top of this cast gate department (5), spring shim (4) is positioned between cast gate department (5) and sharp-tongued (2), and whether the conducting by the compression control of spring shim (4) sharp-tongued (2) and cast gate department (5).