CN202623160U - Enhanced reaction injection molding die - Google Patents
Enhanced reaction injection molding die Download PDFInfo
- Publication number
- CN202623160U CN202623160U CN 201220255267 CN201220255267U CN202623160U CN 202623160 U CN202623160 U CN 202623160U CN 201220255267 CN201220255267 CN 201220255267 CN 201220255267 U CN201220255267 U CN 201220255267U CN 202623160 U CN202623160 U CN 202623160U
- Authority
- CN
- China
- Prior art keywords
- injection molding
- die cavity
- die
- reaction injection
- counterdie
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides an enhanced reaction injection molding die, which comprises an upper die and a lower die, wherein the upper die and the lower die are combined to form a die cavity; a plurality of gas grooves are formed in the upper die and/or the lower die; and the die cavity is communicated with the outside by the gas grooves. By utilizing the die, gas (air or argon) entering the die cavity in the pouring process and gas which is generated by the chemical reaction of materials in the die cavity can be discharged from the gas grooves, so that air vents and needle holes in the surface and inside a workpiece which is subjected to enhanced reaction injection molding are avoided, and the workpiece is smooth in surface and attractive in appearance.
Description
Technical field
The utility model relates to a kind of mould, particularly a kind of novel enhancement mode reaction injection molding mould.
Background technology
At present, the reaction and injection molding process of non-enhancement mode is comparative maturity, for the reaction and injection molding process of non-enhancement mode, aspect mould, has had very ripe technology to satisfy the part production requirement.But along with of the utilization of PU R RIM (polyurethane enhancement mode reaction injection molding) technology in China; The mould process of common reaction injection molding in the past can not satisfy the manufacturing technique requirent of enhancement mode; Common mould process is used in and causes surface of the work and inner pore and pin hole on the reaction and injection molding process of enhancement mode easily, thereby can't satisfy the outward appearance and the performance requirement of part.
The utility model content
The purpose of the utility model provides a kind of enhancement mode reaction injection molding mould, with the reaction and injection molding process that solves enhancement mode easily in surface of the work and the inner problem that forms pore and pin hole.
The utility model proposes a kind of enhancement mode reaction injection molding mould; Comprise a patrix and a counterdie; This patrix merges the back with this counterdie and forms a die cavity in inside, is provided with a plurality of air drains on this patrix and/or this counterdie, and this die cavity is through this air drain and external communications.
Further, this air drain is evenly distributed on around this die cavity.
Further, the position that this patrix is connected with this counterdie is provided with a lower concave part, and inlay card has a castable in this lower concave part, offers on this castable to be communicated with this die cavity and an outside cast gate.
With respect to prior art; The beneficial effect of the utility model is: the mould that utilizes the utility model; Can make the gas of entering die cavity in the casting process and the gas that labor and materials produce via chemical reaction in die cavity, can discharge, make surface of the work and the inner pore-free and the pin hole of enhancement mode reaction injection molding via air drain; Make surface of the work more smooth, profile is more attractive in appearance.
Description of drawings
Fig. 1 is a kind of example structure figure of the utility model enhancement mode reaction injection molding mould;
Fig. 2 is the sketch map that utilizes a kind of workpiece of the utility model enhancement mode reaction injection molding mold injection one-tenth.
The specific embodiment
Specify the utility model below in conjunction with accompanying drawing.
See also Fig. 1, it is a kind of example structure figure of the utility model enhancement mode reaction injection molding mould, and it comprises patrix 1, counterdie 2 and castable 3.Patrix 1 can form a die cavity at mould inside after merging with counterdie 2, is used for the injection moulding workpiece.In the present embodiment, counterdie 2 is provided with a plurality of air drains 4, and air drain 4 is evenly distributed on around the die cavity; Die cavity in the mould can pass through air drain 4 and external communications, therefore, gets into the gas of die cavity and the gas (air or argon gas) that labor and materials produce via chemical reaction in the casting process in die cavity; Can discharge via air drain 4; Thereby make surface of the work and inner pore-free and pin hole, make surface of the work more smooth, profile is more attractive in appearance.
Present embodiment has only illustrated air drain 4 and has been arranged on the counterdie 2; Certainly; Air drain 4 also can be arranged on the patrix 1, and perhaps air drain 4 also can be arranged on patrix 1 and the counterdie 2 simultaneously, as long as air drain 4 can be realized the connection of mould inside and outside; And play the effect of exhaust, just should drop in the protection domain of the utility model.
Be provided with a lower concave part 5 in the position that patrix 1 is connected with counterdie 2, castable 3 inlay cards offer a cast gate 6 on castable 3 in lower concave part 5, and cast gate 6 is communicated with die cavity with outside, is used in mould, pouring into a mould labor and materials.
See also Fig. 2, it is the sketch map that utilizes a kind of workpiece of the utility model enhancement mode reaction injection molding mold injection one-tenth, because the existence of air drain 4, workpiece is in injection moulding process, and the part labor and materials can flow in the air drain 4, thereby forms overlap 7 at the periphery of workpiece.After the workpiece injection mo(u)lding, only need to reject these overlaps 7, can obtain the pore-free pin hole, the workpiece that conforms to quality requirements.
More than the disclosed several specific embodiments that are merely the utility model; But the utility model is not limited thereto; Any those skilled in the art can think variation, only otherwise exceed the said scope of appended claims, all should drop in the protection domain of the utility model.
Claims (3)
1. enhancement mode reaction injection molding mould; Comprise a patrix and a counterdie, this patrix merges the back with this counterdie and forms a die cavity in inside, it is characterized in that; Be provided with a plurality of air drains on this patrix and/or this counterdie, this die cavity is through this air drain and external communications.
2. enhancement mode reaction injection molding mould as claimed in claim 1 is characterized in that this air drain is evenly distributed on around this die cavity.
3. enhancement mode reaction injection molding mould as claimed in claim 1 is characterized in that the position that this patrix is connected with this counterdie is provided with a lower concave part, and inlay card has a castable in this lower concave part, offers on this castable to be communicated with this die cavity and an outside cast gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220255267 CN202623160U (en) | 2012-06-01 | 2012-06-01 | Enhanced reaction injection molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220255267 CN202623160U (en) | 2012-06-01 | 2012-06-01 | Enhanced reaction injection molding die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202623160U true CN202623160U (en) | 2012-12-26 |
Family
ID=47376399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220255267 Expired - Fee Related CN202623160U (en) | 2012-06-01 | 2012-06-01 | Enhanced reaction injection molding die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202623160U (en) |
-
2012
- 2012-06-01 CN CN 201220255267 patent/CN202623160U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20200601 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |