Metal injection molding die
By adopting a through-type injection port and a modular lower mold design in the metal injection molding die, the problem of flow lines caused by powder and binder separation was solved, thereby improving the surface quality of the product and facilitating demolding.
Patent Information
- Application Number
- CN202423160331.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The design of the inlet of existing metal injection molding dies causes the powder and binder to separate, resulting in poor flow lines on the side of the product and difficulty in demolding.
The design employs a through-type injection port and a modular lower mold structure to increase the injection port area and reduce the injection speed. Combined with a cylinder drive and ejector pin structure, it ensures stable mixing of powder and binder.
It improves the quality of the product surface flow lines, reduces the separation of powder and binder, and simplifies the demolding process.
Smart Images
Figure CN223848093U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a forming die technical field, in particular to a metal injection molding die. BACKGROUND
[0002] Metal injection molding is a kind of forming method that metal powder and plastic mixture of binder are injected into model. Metal injection molding die generally includes lower mould, mould core and upper mould, upper mould is equipped with glue inlet, Figure 2 In order to be processed metal piece, in order to inject the metal piece, worker will set up a bump at the bottom of upper mould when making upper film, and set up glue hole on both sides of bump, so as to realize two sides glue injection, small glue inlet can cause powder and binder separation caused by too large injection speed and too large shear rate, in turn cause product side flow pattern bad, therefore, the utility model provides a metal injection molding die. SUMMARY
[0003] The utility model discloses a kind of metal injection molding dies, by being equipped with through-type glue inlet on the upper mould, the area of glue hole can be increased, under the same injection pressure, glue injection speed can be reduced, powder and binder separation reduces, to ensure product surface flow pattern quality.
[0004] The utility model discloses a kind of metal injection molding dies, including lower mould, upper mould and mould core, the lower mould is equipped with mould cavity, the mould core is inserted into the mould cavity, the gap between the mould cavity and the mould core constitutes forming cavity, the upper mould is equipped with through-type glue inlet.
[0005] Preferably, the lower mould is composed of four modules distributed in a cross shape, the end of each module close to each other is a right angle, the tip of the right angle is provided with an arc-shaped groove, and the arc-shaped grooves of the four modules form the mould cavity.
[0006] Preferably, the four modules are driven by air cylinders, and the upper mould is connected with a pressing cylinder.
[0007] Preferably, a thimble hole is vertically arranged on the mould core, a thimble is slidably connected in the thimble hole, and the thimble is connected with a lifting cylinder.
[0008] The utility model technical scheme has the advantages that by being equipped with through-type glue inlet on the upper mould, the two-hole glue injection on the side of the prior art is changed into single-hole glue injection on the top, the area of glue hole can be increased, under the same injection pressure, glue injection speed can be reduced, powder and binder separation reduces, to ensure product surface flow pattern quality, and the completed product can be obtained by cutting off the gate by laser after injection is completed; the lower mould is designed in a modular manner, which facilitates product demolding. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 The arrangement of the metal injection molding mold in working.
[0010] Figure 2 The metal piece structure schematic view.
[0011] Figure 3 The cavity structure schematic view.
[0012] The figure number indicates:
[0013] 1, the lower mold; 2, the upper mold; 3, the mold core; 4, the glue inlet; 5, the cavity. DETAILED DESCRIPTION
[0014] The utility model will be further explained in detail in connection with specific embodiments. EMBODIMENT
[0015] As Figures 1 to 3 shown, the utility model relates to a metal injection molding mold, including lower mold 1, upper mold 2 and mold core 3, be equipped with cavity on the lower mold 1, the mold core 3 is stretched into the cavity, the gap between the cavity and the mold core constitutes cavity 5, be equipped with through type glue inlet 4 on the upper mold 2.
[0016] The lower mold 1 is formed by four modules and is constituted by cross distribution, and the end of the mutual approach of four modules is all set as right angle, and the tip of the right angle is equipped with arc-shaped groove, and the arc-shaped groove of four modules constitutes cavity.
[0017] Four modules are all driven by air cylinder, and the upper mold 2 is connected with down pressure air cylinder.
[0018] The mold core 3 is vertically provided with a needle hole, and a ejector pin is slidably connected in the needle hole, and the ejector pin is connected with a lift air cylinder.
[0019] The utility model has the advantages that by setting through type glue inlet 4 on the upper mold 2, the glue inlet area can be increased, the glue injection speed can be reduced under the same injection pressure, the separation of powder and binder is reduced, so that the product surface flow quality is ensured, and the gate is cut off by laser after injection is completed.
[0020] The above only some embodiments of the utility model. For the ordinary skill in the art, under the premise that without departing from the utility model creation concept, can also make several deformation and improvement, these all belong to the protection scope of the utility model.
Claims
1. A metal injection molding mold characterized by: The mould comprises a lower mould, an upper mould and a mould core, the lower mould is provided with a mould cavity, the mould core extends into the mould cavity, a gap between the mould cavity and the mould core constitutes a mould cavity, and the upper mould is provided with a through-type glue inlet.
2. A metal injection molding mold according to claim 1, characterized in that: The lower mould is composed of four modules which are distributed in a cross shape, the end of each module close to each other is provided with a right angle, the tip of the right angle is provided with an arc-shaped groove, and the arc-shaped grooves of the four modules constitute the mould cavity.
3. A metal injection molding mold according to claim 2, characterized in that: The four modules are driven by air cylinders, and the upper mould is connected with a pressing air cylinder.
4. A metal injection molding mold according to claim 1, characterized in that: A thimble hole is vertically arranged on the mould core, a thimble is slidably connected in the thimble hole, and the thimble is connected with a lifting air cylinder.