Injection mold protection mechanism with relatively small insertion angle

Abstract

The utility model provides an injection mold protection mechanism with a relatively small insertion angle, which comprises a cavity plate and a core plate, a first mold closing contact part which is annularly arranged is arranged at the bottom of the cavity plate, and the outer side surface of the first mold closing contact part is a mold closing inclined surface which is inwards inclined from top to bottom; a second mold closing contact part correspondingly matched with the first mold closing contact part is arranged at the top of the core plate, the inclination of the inner side face of the second mold closing contact part is consistent with that of the outer side face of the first mold closing contact part, a first mounting groove is formed in the outer side face of the first mold closing contact part, and a first fine positioning block is connected into the first mounting groove; a second mounting groove is formed in the outer side surface of the second mold closing contact part, a second fine positioning block is connected in the second mounting groove, and the mold cavity plate and the mold core plate are in contact and positioned in advance through the first fine positioning block and the second fine positioning block before mold closing in place. Through advanced contact positioning of the first fine positioning block and the second fine positioning block, the contact surface of the mold cavity plate and the mold core plate is prevented from being strained in the mold closing process of the stop mold.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially is related to a kind of injection mold protection mechanism to the small angle of insertion. BACKGROUND

[0002] With the rapid development of automobile era, the pursuit of appearance requirement of consumer is higher and higher, product appearance design is more and more personalized, so that mold becomes very complex;So there are often product features on the mold, which leads to small insertion angle of mold, and also meets the risk of burr, deformation or cracking during long-term production. The commonly used steel material for mold is mainly 1.2738\718\P20, and the material hardness is about 28-32°. For the position with small insertion angle (within 2°), it is easy to produce strain phenomenon, and cracking risk may occur in serious position. The locking angle of mold is generally 7-10°, and less than 7° is easy to produce self-locking phenomenon. The temperature of moving and fixed molds will gradually increase during production due to heat transfer of material temperature, and the corresponding material reasonable mold temperature is reached. Therefore, the small locking angle may cause self-locking risk, and the mold cannot be opened. Therefore, the locking around the mold cannot be used as the protection guide for small-angle insertion. SUMMARY

[0003] In view of the above problems, the utility model aims at providing a kind of injection mold protection mechanism to the small angle of insertion, which is novel in structure, and realizes early contact positioning by setting precision positioning block structure on cavity plate and core plate, to prevent strain phenomenon caused by inaccurate mold closing position between cavity plate and core plate during mold closing process.

[0004] The technical scheme of the utility model is a kind of injection mold protection mechanism to the small angle of insertion, comprising cavity plate and core plate, the cavity plate bottom is provided with the first mold closing contact part of annular arrangement, the first mold closing contact part outer side is the mold closing inclined surface that is inclined from top to bottom to inside, the core plate top is provided with the second mold closing contact part corresponding with the first mold closing contact part, the second mold closing contact part inner side is consistent with the inclination of first mold closing contact part outer side, the first mold closing contact part outer side different position is equipped with a plurality of independent first installation slot, first precision positioning block is connected in the first installation slot, the second mold closing contact part outer side different position is equipped with a plurality of independent second installation slot, second precision positioning block is connected in the second installation slot, the cavity plate and core plate are contacted and positioned in advance by first precision positioning block and second precision positioning block before mold closing in place, the hardness of first precision positioning block and second precision positioning block is greater than the hardness of cavity plate and core plate.

[0005] Preferably, the inclination angle of the inner side of the second mold closing contact part is greater than or equal to 7°.

[0006] Preferably, the first precision positioning block is connected in the first installation groove by screw, and the second precision positioning block is connected in the second installation groove by screw.

[0007] Preferably, the number of the first precision positioning block is four, and two groups are arranged in the length and width direction of the first mold closing contact part; the number of the second precision positioning block is four, and two groups are arranged in the length and width direction of the second mold closing contact part.

[0008] Preferably, the inclination angle of the contact surface of the first precision positioning block and the second precision positioning block is 0.5-1°.

[0009] Preferably, the material of the first precision positioning block and the second precision positioning block is Cr12, and HRC reaches 20-25.

[0010] Preferably, the material of the first precision positioning block and the second precision positioning block is Cr12 after vacuum quenching, and HRC reaches 48-52.

[0011] The first precision positioning block and the second precision positioning block are contacted and positioned in advance in the mold closing process of the core plate and the cavity plate, so that the inaccuracy of the mold closing position between the cavity plate and the core plate in the mold closing process is prevented, and the phenomenon of being pulled is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure schematic view of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 It is Figure 2 It is a sectional view along A-A direction;

[0015] Figure 4 It is a sectional view along B-B direction of the utility model;

[0016] Figure 5 It is a structure schematic view of the cavity plate in the utility model;

[0017] Figure 6 It is a structure schematic view of the core plate in the utility model;

[0018] Wherein: 1-cavity plate; 11-first mold closing contact part; 111-first installation groove; 2-core plate; 21-second mold closing contact part; 211-second installation groove; 3-first precision positioning block; 4-second precision positioning block. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in combination with the drawings. The utility model discloses a first precision positioning block and a second precision positioning block are arranged on the first mold closing contact part and the second mold closing contact part of the cavity plate and the core plate respectively, and the first precision positioning block and the second precision positioning block are contacted and positioned in advance in the mold closing process of the cavity plate and the core plate, so that the inaccuracy of the mold closing position between the cavity plate and the core plate in the mold closing process is prevented, and the phenomenon of being pulled is avoided.

[0020] As Figures 1 to 6 The utility model discloses a kind of injection mould protection mechanisms to insert angle is small, including cavity plate 1 and core plate 2, the cavity plate 1 bottom is provided with the first mold contact part 11 of annular arrangement, the first mold contact part 11 outer side is by up to down inwardly inclined mold inclined surface, the core plate 2 top is provided with the second mold contact part 21 of corresponding cooperation with first mold contact part 11, the second mold contact part 21 inner side and the inclination of first mold contact part 11 outer side is consistent, the first mold contact part 11 outer side different position is equipped with multiple independent first installation groove 111, first installation groove 111 is connected with first precision positioning block 3, the second mold contact part 21 outer side different position is equipped with multiple independent second installation groove 211, second installation groove 211 is connected with second precision positioning block 4, the cavity plate 1 and core plate 2 are contacted and positioned in advance by first precision positioning block 3 and second precision positioning block 4 before clamping in place, the hardness of first precision positioning block 3 and second precision positioning block 4 is greater than the hardness of cavity plate 1 and core plate 2.

[0021] In the above scheme, the inclination angle of the inner side of the second mold contact part 21 is greater than or equal to 7° than the inclination angle of the outer side of the first mold contact part 11.

[0022] In addition, the first precision positioning block 3 is connected in the first installation groove 111 by screw, and the second precision positioning block 4 is connected in the second installation groove 211 by screw.

[0023] Specifically, the number of the first precision positioning block 3 is 4, and two groups are arranged in the length and width direction of the first mold contact part 11; the number of the second precision positioning block 4 is 4, and two groups are arranged in the length and width direction of the second mold contact part 21.

[0024] In addition, the inclination angle of the contact surface of the first precision positioning block 3 and the second precision positioning block 4 is 0.5°-1°.

[0025] Specifically, the material of the first precision positioning block 3 and the second precision positioning block 4 is Cr12, and HRC reaches 20-25.

[0026] Further, the material of the first precision positioning block 3 and the second precision positioning block 4 is Cr12 after vacuum quenching, and HRC reaches 48-52.

[0027] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change or modification made according to the technical principle of the utility model to the above embodiments still belongs to the scope of the utility model technical solution.

Claims

1. A protection mechanism for injection mold with small corner angle, comprising a cavity plate (1) and a core plate (2), characterized in that: The bottom of the cavity plate (1) is provided with a first mold contact part (11) arranged in a ring shape, the outer side of the first mold contact part (11) is a mold closing inclined surface inclined inward from top to bottom, the top of the core plate (2) is provided with a second mold contact part (21) corresponding to the first mold contact part (11), the inner side of the second mold contact part (21) is consistent with the inclination of the outer side of the first mold contact part (11), the outer side of the first mold contact part (11) is provided with a plurality of independent first installation grooves (111) at different positions, the first installation grooves (111) are connected with first precision positioning blocks (3) inside, the outer side of the second mold contact part (21) is provided with a plurality of independent second installation grooves (211) at different positions, the second installation grooves (211) are connected with second precision positioning blocks (4) inside, the first precision positioning blocks (3) and the second precision positioning blocks (4) are used for pre-positioning before the cavity plate (1) and the core plate (2) are closed in place, the hardness of the first precision positioning blocks (3) and the second precision positioning blocks (4) is greater than the hardness of the cavity plate (1) and the core plate (2).

2. The injection mold protection mechanism according to claim 1, wherein: The inclination angle of the inner side of the second mold contact part (21) is greater than or equal to 7° than the inclination angle of the outer side of the first mold contact part (11).

3. The injection mold protection mechanism of claim 1, wherein: The first precision positioning blocks (3) are connected in the first installation grooves (111) through screws, and the second precision positioning blocks (4) are connected in the second installation grooves (211) through screws.

4. The injection mold protection mechanism of claim 3, wherein: The number of the first precision positioning blocks (3) is four, and two groups are arranged in the length and width directions of the first mold contact part (11); the number of the second precision positioning blocks (4) is four, and two groups are arranged in the length and width directions of the second mold contact part (21).

5. The injection mold protection mechanism of claim 3, wherein: The inclination angle of the contact surface of the first precision positioning blocks (3) and the second precision positioning blocks (4) is 0.5°-1°.

6. The injection mold protection mechanism of claim 3, wherein: The material of the first precision positioning blocks (3) and the second precision positioning blocks (4) is Cr12, and HRC reaches 20-25.

7. The injection mold protection mechanism of claim 3, wherein: The material of the first precision positioning blocks (3) and the second precision positioning blocks (4) is Cr12 after vacuum quenching, and HRC reaches 48-52.

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