CN201070831Y - Sliding fit structure of injection mold - Google Patents
Sliding fit structure of injection mold Download PDFInfo
- Publication number
- CN201070831Y CN201070831Y CNU2007200534038U CN200720053403U CN201070831Y CN 201070831 Y CN201070831 Y CN 201070831Y CN U2007200534038 U CNU2007200534038 U CN U2007200534038U CN 200720053403 U CN200720053403 U CN 200720053403U CN 201070831 Y CN201070831 Y CN 201070831Y
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- CN
- China
- Prior art keywords
- die cavity
- intermediate layer
- steel
- core rod
- mold core
- 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 - Lifetime
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Abstract
The utility model relates to a coordinated structure of an injection mould in a CD injection machine, and comprises a mold core and a die cavity which is matched with the mold core. The normal temperature is needed when the mold core and the die cavity are assembled, the temperature is 40 to 150 DEG C in the functional mode, and the relative sliding is provided between the mold core and the die cavity in the functional mode. Both the mold core and the die cavity are made of the steel material, and a metal interface layer is sleeved at the surface of the outer circumference of the mold core. The swell factor of the interface layer is greater than the swell factor of the steel, the hardness of the interface layer is lower than the hardness of the steel, and the mold core is wear-proof. Under the normal temperature, a certain clearance is provided between the surface of the outer circumference of the metal interface layer and the inner surface of the die cavity. The structure enables that a certain clearance is provided between the surface of the outer circumference of the interface layer and the inner surface of the die cavity under the normal temperature. In the functional mode, the swell factor of the interface layer is greater than the swell factor of the steel, so the clearance between the interface layer and the steel is eliminated automatically with the increasing temperature of the mould in the functional mode, and burr of the injection moulding product caused by the oversized clearance between the mold core and the die cavity can be avoided.
Description
Technical field
The utility model relates to a kind of sliding matching structure of injection mold.
Background technology
Two parts of die cavity that in injection mould, all core rod can be arranged and match usually with core rod, core rod and die cavity are the steel material and make, in injection moulding process, core rod is done relative slip with die cavity, smooth and easy for safety action, and the two has certain clearance usually, size requirements for this gap is very high, if the gap is less than normal, can causes the wearing and tearing of mating parts, even cause sliding part stuck and can't move; If the gap is too big, then injecting products can produce burr.
The utility model content
The utility model is intended to overcome above-mentioned the deficiencies in the prior art, a kind of sliding matching structure of injection mold is provided, the burr that it has not only avoided injecting products to produce because of the excesssive gap between core rod and the die cavity, and reduced wearing and tearing between core rod and the die cavity.
The sliding matching structure of a kind of injection mold that provides according to the utility model, comprise the die cavity that a core rod and is mated, when described core rod and die cavity assembling is normal temperature, the duty temperature is 40～150 ℃, between core rod and the die cavity relative slip is arranged in working order, described core rod and die cavity are made by the steel material, the external peripheral surface of described core rod is with a metal intermediate layer, the coefficient of expansion in this intermediate layer is greater than the coefficient of expansion of steel, hardness is lower than the hardness of steel and more wear-resisting, has certain interval at normal temperatures between the external peripheral surface of described metal intermediate layer and the die cavity inner surface.
The utility model also has following additional technical feature:
Described metal intermediate layer is made by the beryllium copper material.
Described metal intermediate layer inner circumferential surface and core rod external peripheral surface are interference fit.
Following in working order the cooperating of inner circumferential surface with die cavity of described metal intermediate layer external peripheral surface is the interference of maximum 0.02mm gap to maximum 0.02mm.
The utility model is compared with relative prior art has following advantage: the external peripheral surface of described core rod is with a metal intermediate layer, the coefficient of expansion in this intermediate layer is greater than the coefficient of expansion of steel, hardness is lower than the hardness of steel and more wear-resisting, has certain interval between the external peripheral surface of described metal intermediate layer and the described core rod inner surface under the normal temperature, this structure makes when normal temperature, has certain interval between intermediate layer external peripheral surface and the described die cavity inner surface, in the time of in working order, because the coefficient of expansion in intermediate layer is greater than the coefficient of expansion of steel, therefore, along with the rising of duty mold temperature has just been eliminated the gap between the two, the burr of having avoided injecting products to produce because of the excesssive gap between core rod and the die cavity automatically; Because the hardness in intermediate layer is lower than the hardness of steel, has reduced its frictional force, thereby reduced the wearing and tearing of die cavity simultaneously described die cavity inner surface.
Description of drawings
Embodiment below in conjunction with accompanying drawing provides describes the utility model in detail, wherein:
Fig. 1 is a kind of structural representation of preferred embodiment of the sliding matching structure of a kind of injection mold of the utility model.
The specific embodiment
Referring to Fig. 1, a kind of optimal way of the sliding matching structure of a kind of injection mold of the utility model is shown, comprise a core rod 1 and a die cavity that is mated 2, described core rod 1 is a normal temperature when assembling with die cavity 2, the duty temperature is 40～150 ℃, between core rod 1 and the die cavity 2 relative slip is arranged in working order, described core rod 1 is made by the steel material with die cavity 2, the external peripheral surface of described core rod 1 is with a metal intermediate layer 3, the coefficient of expansion in this intermediate layer 3 is greater than the coefficient of expansion of steel, hardness is lower than the hardness of steel and more wear-resisting, has certain interval at normal temperatures between the external peripheral surface of described metal intermediate layer 3 and die cavity 2 inner surfaces, described metal intermediate layer 3 is made by the beryllium copper material, described metal intermediate layer 3 inner circumferential surfaces and core rod external peripheral surface are interference fit, this structure makes when normal temperature, has certain interval between intermediate layer 3 external peripheral surfaces and described die cavity 2 inner surfaces, in the time of in working order, because the coefficient of expansion in intermediate layer 3 is greater than the coefficient of expansion of steel, therefore in working order along with the rising of mold temperature has just been eliminated the gap between the two automatically, following in working order the cooperating of inner circumferential surface with die cavity 2 of described metal intermediate layer 3 external peripheral surfaces is the interference of maximum 0.02mm gap to maximum 0.02mm simultaneously, the burr of having avoided injecting products to produce because of the excesssive gap between core rod 1 and the die cavity 2; Because the hardness in intermediate layer 3 is lower than the hardness of steel, has reduced its frictional force, thereby reduced the wearing and tearing of die cavity 2 simultaneously described die cavity 2 inner surfaces.
The foregoing description is only for the usefulness that the utility model is described; and be not to be to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.
Claims (4)
1. the sliding matching structure of an injection mold, comprise a core rod (1) and a die cavity that is mated (2), described core rod (1) is a normal temperature when assembling with die cavity (2), the duty temperature is 40～150 ℃, between core rod (1) and the die cavity (2) relative slip is arranged in working order, described core rod (1) is made by the steel material with die cavity (2), the external peripheral surface that it is characterized in that described core rod (1) is with a metal intermediate layer (3), the coefficient of expansion in this intermediate layer (3) is greater than the coefficient of expansion of steel, hardness is lower than the hardness of steel and more wear-resisting, has certain interval at normal temperatures between the external peripheral surface of described metal intermediate layer (3) and die cavity (2) inner surface.
2. according to the sliding matching structure of the described injection mold of claim 1, it is characterized in that described metal intermediate layer (3) made by the beryllium copper material.
3. according to the sliding matching structure of the described injection mold of claim 1, it is characterized in that described metal intermediate layer (3) inner circumferential surface and core rod (1) external peripheral surface are interference fit.
4. according to the sliding matching structure of the described injection mold of claim 1, it is characterized in that following in working order the cooperating of inner circumferential surface with die cavity (2) of described metal intermediate layer (3) external peripheral surface is the interference of maximum 0.02mm gap to maximum 0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200534038U CN201070831Y (en) | 2007-06-28 | 2007-06-28 | Sliding fit structure of injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200534038U CN201070831Y (en) | 2007-06-28 | 2007-06-28 | Sliding fit structure of injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201070831Y true CN201070831Y (en) | 2008-06-11 |
Family
ID=39549389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200534038U Expired - Lifetime CN201070831Y (en) | 2007-06-28 | 2007-06-28 | Sliding fit structure of injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201070831Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044079A (en) * | 2017-12-22 | 2018-05-18 | 西安交通大学 | A kind of high-strength alloy and heat-stable ceramic laminated coating die casting and preparation method thereof |
| CN108679471A (en) * | 2018-04-08 | 2018-10-19 | 中山德诚智造光电有限公司 | The manufacture craft of graphene heat dissipation plastic material cladding high-voltage linear constant current driving lamp plate and high-voltage linear constant current drive lamp plate |
| CN111421859A (en) * | 2020-05-06 | 2020-07-17 | 丹阳丹金航空材料科技有限公司 | Carbon fiber mold for manufacturing aerospace materials |
-
2007
- 2007-06-28 CN CNU2007200534038U patent/CN201070831Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044079A (en) * | 2017-12-22 | 2018-05-18 | 西安交通大学 | A kind of high-strength alloy and heat-stable ceramic laminated coating die casting and preparation method thereof |
| CN108044079B (en) * | 2017-12-22 | 2020-03-17 | 西安交通大学 | Die-casting die for high-strength alloy and heat-resistant ceramic laminated coating and preparation method thereof |
| CN108679471A (en) * | 2018-04-08 | 2018-10-19 | 中山德诚智造光电有限公司 | The manufacture craft of graphene heat dissipation plastic material cladding high-voltage linear constant current driving lamp plate and high-voltage linear constant current drive lamp plate |
| CN111421859A (en) * | 2020-05-06 | 2020-07-17 | 丹阳丹金航空材料科技有限公司 | Carbon fiber mold for manufacturing aerospace materials |
| CN111421859B (en) * | 2020-05-06 | 2021-11-12 | 丹阳丹金航空材料科技有限公司 | Carbon fiber mold for manufacturing aerospace materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080611 |
|
| CX01 | Expiry of patent term |