CN210758991U - Injection mold ejection structure and injection mold - Google Patents

Abstract

The utility model provides an ejecting structure of injection mold, including the fixed die plate, the movable mould board, needle subassembly and at least one knot machine at the bottom of the cover half, it includes fixed buckle to detain the machine, the activity buckle, the connecting block, elastic component and fixture block, fixed buckle is fixed with fixed die plate relative position, the movable mould board can move towards the direction of keeping away from the fixed die plate, needle subassembly and activity buckle at the bottom of the cover half are connected to the connecting block, make needle subassembly synchronous motion at the bottom of activity buckle and the cover half, be equipped with the holding tank on the movable mould board, the fixture block passes through the elastic component and is connected with the diapire of holding tank, the fixture block can stretch out and draw back in the holding tank and remove, the activity buckle is equipped with the drag hook, the drag hook is held with the fixture block card, fixed buckle is equipped with the boss, the boss can move. The utility model discloses can realize movable mould board and cover half base pin subassembly synchronous motion and drawing of patterns operation, its low in production cost, the operation is stable, is suitable for and uses widely on a large scale.

Description

Injection mold ejection structure and injection mold

technical field

The utility model relates to the technical field of injection moulds, in particular to an injection mould ejection structure and an injection mould.

Background technique

An injection mold is required to produce an injection molded product. When there is a buckle on the top of the product, a sloping top and an ejection structure need to be set on the fixed mold, otherwise the product will be pulled by the sticking front mold. However, in the prior art, it is necessary to set up an independent power system for the fixed mold lifter and the ejector mechanism to realize the fixed mold lifter core pulling and ejection, but the independent power system has the advantages of high production cost, inconvenient assembly, and easy damage. Unstable operation, etc.

Utility model content

The problem solved by the utility model is that the fixed die ejection structure needs to be provided with an independent power system.

In order to solve the above problems, the utility model provides an injection mold ejection structure, which includes a fixed template, a movable template, a fixed mold bottom needle assembly and at least one buckle machine, and the buckle machine includes a fixed buckle plate, a movable buckle plate, and a connecting block. , an elastic member and a clamping block, the fixed gusset plate is fixed relative to the fixed platen, the movable platen can move away from the fixed platen, and the connecting block connects the fixed mold bottom needle assembly and the fixed platen. The movable gusset plate makes the movable gusset plate and the fixed die bottom needle assembly move synchronously, the movable die plate is provided with a accommodating groove, and the clamping block is connected with the bottom wall of the accommodating groove through the elastic member , the clamping block can be telescopically moved in the accommodating groove, the movable buckle plate is provided with a hook, the hook is clamped with the clamping block, the fixed buckle plate is provided with a boss, and the boss can When the movable gusset moves to a preset position, it cooperates with the blocking block to overcome the elastic force of the elastic member to retract the blocking block, so as to separate the blocking block from the draw hook.

Compared with the prior art, the injection mold ejection structure of the utility model can solve the problem of the ejection of the fixed mold, realize the synchronous movement and demoulding operation of the movable template and the bottom needle assembly of the fixed mold, and avoid the phenomenon of mold strain before sticking. The components of the structure are ingeniously matched, and no independent power system needs to be set up, the production cost is low, the operation is stable, and it is suitable for widespread use.

Optionally, a limiting groove is provided on the clamping block, and the draw hook can enter the limiting groove and be clamped with the clamping block. After the hook enters the limit slot, it is clamped with the clamping block, and the connection is reliable and will not be detached during use.

Optionally, the limiting groove has a limiting surface, and a limiting plate is arranged in the accommodating groove, and the limiting plate can abut against the limiting surface to limit the protruding position of the clamping block. The protruding position of the clamping block is limited by the limit plate, so that the clamping block is prevented from falling off, and the assembly is convenient.

Optionally, the limiting groove has a resisting surface, and the retracting hook has a holding surface, and the holding surface can abut with the resisting surface, so that the retracting hook and the clamping block are latched. The holding surface of the pull hook is in contact with the abutting surface of the block card, so that the pull hook and the block can cooperate reliably.

Optionally, the draw hook has a reset surface, the reset surface is disposed on the opposite side of the holding surface, and the reset surface is inclined toward the holding surface along the extending direction of the draw hook. When the injection mold is reset, the reset surface will squeeze the clamping block to retract the clamping block into the accommodating groove, and the inclined reset surface facilitates the smooth retraction of the clamping block and makes the injection mold reset smoothly.

Optionally, the clamping block has a first matching surface and a second matching surface disposed opposite to each other, and the first matching surface and the second matching surface are inclined toward the abutting surface along the extending direction of the clamping block. During the demoulding and reset process of the injection mold, the clamping block will cooperate with the boss, and the elastic part will be squeezed to make the clamping block retract. Demoulding and reset actions are smooth.

Optionally, the boss has a first guide surface and a second guide surface disposed opposite to each other, and the first guide surface and the second guide surface are inclined toward the clamping surface along the extending direction of the boss . During the demoulding and reset process of the injection mold, the bosses will cooperate with the clamping blocks, so that the clamping blocks can be retracted against the elastic force of the elastic parts.

Optionally, an extension height of the boss toward the clamping block is greater than an extension height of the draw hook toward the clamping block. It is ensured that the clamping block and the boss can be separated from the hook, which can play a foolproof role and prevent the hook of the movable gusset from being separated from the clamping block, and the moving template continues to move, causing the hook to break.

Optionally, the fixed gusset is provided with a movable groove, and the movable gusset can slide in the movable groove. The movable slot limits the movement direction of the movable buckle plate, which ensures the reliable operation of the buckle machine.

The utility model also provides an injection mold, which includes the above injection mold ejection structure.

Compared with the prior art, the injection mold of the utility model solves the problem of ejection of the fixed mold, and completes the core-pulling and ejection of the inclined top of the fixed mold through the buckle mechanism, which has reliable operation, low production cost, strong practicability, and excellent performance. Promote value.

Description of drawings

Fig. 1 is the structure diagram of the injection mold clamping state of the utility model embodiment;

Fig. 2 is the structural diagram of the buckle machine of the embodiment of the present utility model;

Fig. 3 is the exploded view of the buckle machine of the embodiment of the utility model;

4 is a structural diagram of a card block according to an embodiment of the present invention;

5 is an assembly diagram of a clamping block according to an embodiment of the present utility model;

6 is an assembly diagram of a movable gusset according to an embodiment of the present invention;

Fig. 7 is the structure diagram of the clamping machine in the clamping state of the injection mold according to the embodiment of the present utility model;

8 is a cross-sectional view of an injection mold clamping machine in a clamping state according to an embodiment of the present utility model;

Fig. 9 is the enlarged view of A part in Fig. 8;

Fig. 10 is the structure diagram in the process of mold opening of the injection mold of the embodiment of the present utility model;

Fig. 11 is the structural diagram of the buckle machine during the mold opening process of the injection mold according to the embodiment of the present utility model;

12 is a cross-sectional view of the buckle machine during the mold opening process of the injection mold according to the embodiment of the present utility model;

Figure 13 is an enlarged view of part B in Figure 12;

FIG. 14 is a structural diagram of an injection mold in an open state of an embodiment of the present invention.

Description of reference numbers:

1-Fixed pinch plate, 11-Boss, 111-First guide surface, 112-Second guide surface, 12-Active groove;

2- Movable gusset, 21- Retractor, 211- Clamping surface, 212- Reset surface, 22- Connection block;

3-block, 31-limiting groove, 311-resisting surface, 312-limiting surface, 32-first matching surface, 33-second matching surface, 34-elastic piece, 35-limiting plate;

41-fixed die bottom plate, 42-fixed die face needle plate, 43-fixed die bottom needle plate, 44-fixed die square iron, 45-fixed die plate, 46-hot runner plate

51- movable die bottom plate, 52- movable die face needle plate, 53- movable die bottom needle plate, 54- movable die square iron, 55- movable die plate.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it should be noted that the terms and nouns in each embodiment, such as "upper", "lower", "front", "rear", "left", "right" and other words indicating orientation, It is only for the purpose of simplifying the description based on the positional relationship of the drawings in the description, and does not mean that the components and devices referred to must be operated in accordance with the specific orientation and limited operations, methods, and structures in the description. limit.

In the drawings of the embodiments of the present invention, a coordinate system XYZ is set, wherein the positive direction of X represents the front, the reverse direction of X represents the rear, the positive direction of the Y axis represents the upper direction, the reverse direction of the Y axis represents the downward direction, and the reverse direction of the Z axis represents the downward direction. The positive direction represents the right, and the direction of the Z axis represents the left.

In addition, the terms "first" and "second" mentioned in the embodiments of the present invention are only used for the purpose of description, and should not be understood as indicating or implying relative importance or implying the indicated technical features. quantity. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

The "inside" and "outside" mentioned in the embodiments of the present invention refer to a cavity structure, such as a box, the inside of the box is the inside, and the outside of the box is the outside.

1 to 14 , an embodiment of the present utility model discloses an injection mold with an ejection structure, including a fixed mold assembly, a movable mold assembly and at least one buckle machine, wherein the fixed mold plate 45 and the movable mold plate 55 , The fixed bottom needle assembly and the button machine constitute the injection mold ejection structure, which is used to slantly pull the product from the injection mold and eject the product after the product is formed. The ejection structure can be adapted to various forms of injection molds. The fixed mold assembly and the movable mold assembly involved in this embodiment are only one form of injection mold. In other embodiments, the ejection structure can be applied to in other forms of mold.

Referring to FIG. 1 , which is a structural diagram of the mold clamping state of the injection mold of this embodiment, the fixed mold assembly of the injection mold includes a fixed mold base plate 41 , a hot runner plate 46 , and a fixed mold surface needle assembled from top to bottom in sequence. Plate 42, fixed mold bottom needle plate 43, fixed mold square iron 44 and fixed mold plate 45, fixed mold surface needle plate 42 and fixed mold bottom needle plate 43 form a fixed mold bottom needle assembly, and the movable mold assembly is assembled in the fixed mold assembly. Below the movable mold assembly, the movable mold plate 55, the movable mold square iron 54, the movable mold bottom needle plate 53, the movable mold face needle plate 52 and the movable mold base plate 51 are assembled sequentially from top to bottom. During the demoulding process, the fixed platen 45 is fixed in position, and the movable platen 55 moves downward to be away from the fixed platen 45 . The injection mold includes one or more buckle machines. In this embodiment, a buckle machine is respectively set on the front and rear sides of the injection mold to ensure stable operation of the clamping and demolding actions.

With reference to FIGS. 2 to 6 , the buckle machine includes a fixed buckle plate 1 , a movable buckle plate 2 , a connecting block 22 , an elastic member 34 and a clamping block 3 . The upper part of the fixing plate 1 is fixed on the hot runner plate 46 by screws, so that the relative position of the fixing plate 1 and the fixed plate 45 is fixed. The fixed gusset 1 has a movable slot 12. The movable gusset 2 is assembled in the movable slot 12. The movable gusset 2 can slide up and down along the movable slot 12. The movable slot 12 defines the movement direction of the movable gusset 2 to ensure the reliable operation of the buckle machine. . The connecting block 22 is fixed on the upper part of the movable gusset 2 by screws, and the connecting block 22 is connected with the fixed die bottom needle assembly by screws, so that when the movable gusset plate 2 moves, the fixed die bottom needle assembly moves with it.

With reference to Fig. 5 , the movable platen (in the figure, the partial structure of the movable platen) is provided with an accommodating groove for placing the clamping block 3, and the clamping block 3 can move in the accommodating groove. The clamping block 3 is connected to the bottom wall of the accommodating groove through an elastic member 34, and the elastic member 34 is in a compressed state. When the clamping block 3 is subjected to a force toward the accommodating groove, the elastic member 34 is squeezed and deformed, and the clamping block 3 moves toward the accommodating groove. Inward retraction, when the clamping block 3 is not subjected to the force toward the accommodating groove, the elastic member 34 deforms and recovers, so that the clamping block 3 extends out of the accommodating groove. In this embodiment, the elastic member 34 is a spring. In other embodiments, the elastic member 34 may also be in the form of an elastic sheet, a rubber elastic block, an elastic column, or the like.

The lower part of the movable gusset 2 is provided with a pull hook 21 , and the pull hook 21 can be clamped with the clamping block 3 . When the pull hook 21 is clamped with the clamping block 3 , the movable template 55 moves synchronously with the movable gusset 2 , and is then driven by the connecting block 22 The fixed die bottom needle assembly moves synchronously to complete the fixed die oblique top core pulling and ejection operations.

The lower part of the fixed buckle plate 1 is provided with a boss 11. When the block 3 moves to the position of the boss 11, the boss 11 pushes the block 3 and overcomes the elastic force of the elastic member 34 to move the block 3 to the inside of the accommodating slot, so that the The clamping block 3 is disengaged from the draw hook 21, the movable template 55 continues to move downward, and the movable gusset 2 no longer follows the movement to complete the demoulding action.

The injection mold realizes the synchronous movement and demoulding operation of the movable platen and the fixed mold bottom needle assembly through the buttoning machine, so as to avoid the phenomenon of mold strain before sticking. It runs stably and is suitable for widespread use.

The boss 11 of the fixed gusset 1 and the hook 21 of the movable gusset 2 both extend toward the block 3, and the extension height of the boss 11 is greater than that of the pull hook 21, so as to ensure that when the block 3 moves to the same position as the protrusion. When the table 11 is in contact, it can cooperate with the boss 11, so that the block 3 and the hook 21 are no longer in contact, so that the block 3 is separated from the hook 21, which plays a foolproof role and prevents the hook 21 of the movable gusset 2 from being in contact with the hook 21. The clamping block 3 is not separated, but the moving template 55 continues to move, causing the pull hook 21 to be pulled off.

4 and 5 , a limit slot 31 is set in the lower part of the clamping block 3 , and the pull hook 21 can enter the limit groove 31 to be clamped with the clamping block 3 , so that the connection between the pulling hook 21 and the clamping block 3 is reliable and moves synchronously. It doesn't come off during the process. A detachable limit plate 35 is arranged in the accommodating groove, and the limit plate 35 is fixed by screws. The limit plate 35 is installed at the front of the extension direction of the block 3. When the block 3 is in the extended state, the limit plate 35 enters the limit slot 31 to block the block 3 from continuing to move outward, that is, it is limited by the limit plate 35. The protruding position of the blocking block 3 is adjusted to prevent the blocking block 3 from falling off. And the limit plate 35 can be disassembled, which is convenient for the assembly and replacement of the clamping block 3 .

9 and 13 , in this embodiment, the shapes of the clamping block 3 , the hook 21 , and the boss 11 are limited, so that the contact surfaces of the various parts can be matched and the injection mold works smoothly. The clamping block 3 has a first matching surface 32 and a second matching surface 33 arranged oppositely, wherein the first matching surface 32 is on one side close to the fixed plate 45 , and the second matching surface 33 is on the other side. The limiting groove 31 has a limiting surface 312 and a resisting surface 311 , the resisting surface 311 is parallel to the extension direction of the clamping block 3 , and the limiting surface 312 is perpendicular to the resisting surface 311 . When the limiting plate 35 blocks the blocking block 3 from extending, The limiting plate 35 abuts against the limiting surface 312 . Along the extension direction of the clamping block 3, the first matching surface 32 and the second matching surface 33 are inclined toward the abutting surface 311. Generally, the first matching surface 32 and the second matching surface 33 are symmetrically arranged, and the first matching surface 32 The angle between the second mating surface 33 and the abutting surface 311 is between 30° and 60°, and the angle between the second matching surface 33 and the abutting surface 311 is between 30° and 60°. The obliquely arranged first mating surface 32 and the second mating surface 33 make the clamping block 3 subject to an oblique pressing force, which facilitates the smooth retraction of the clamping block 3, and makes the demolding and reset process of the injection mold run smoothly.

The hook 21 of the movable gusset 2 has a clamping surface 211 and a reset surface 212 disposed opposite to each other, wherein one side close to the fixed template 45 is the clamping surface 211 , and the other side is the reset surface 212 . The clamping surface 211 is parallel to the abutting surface 311. When the hook 21 is clamped with the clamping block 3, the clamping surface 211 is in contact with the abutting surface 311, so that the hook 21 and the clamping block 3 cooperate reliably and will not occur during the synchronous movement. break away. Along the extension direction of the hook 21, the reset surface 212 is inclined toward the holding surface 211, and the angle between the reset surface 212 and the holding surface 211 is between 30° and 60°. The first mating surface 32 of the two slides relatively slides, so that it is convenient to apply an oblique pressing force to the clamping block 3, push the clamping block 3 to retract smoothly, and make the injection mold reset smoothly.

The boss 11 of the fixed gusset 1 has a first guide surface 111 and a second guide surface 112 arranged oppositely, wherein the first guide surface 111 is on the side close to the fixed plate 45, and the second guide surface 112 is on the other side. In the extending direction of the boss 11 , the first guide surface 111 and the second guide surface 112 are inclined toward the holding surface 211 of the hook 21 . In general, the first guide surface 111 and the second guide surface 112 are symmetrically arranged, the angle between the first guide surface 111 and the holding surface 211 is between 30° and 60°, and the second guide surface 112 and the The angle between the faces 311 is also between 30° and 60°. During the demoulding process of the injection mold, the first guide surface 111 of the boss 11 will come into contact with the second mating surface 33 of the clamping block 3, and the inclined first guiding surface 111 and the second mating surface 33 will slide and fit, and the clamp will be pushed obliquely. The block 3 moves into the accommodating groove, so that the clamping block 3 and the pull hook 21 can be separated smoothly. Preferably, the first guide surface 111 and the second matching surface 33 are parallel to each other, which is more conducive to smoothly pushing the clamping block 3 to move. During the reset process of the injection mold, the second guide surface 112 of the boss 11 will contact the first mating surface 32 of the block 3, and the inclined second guide surface 112 and the first mating surface 32 slide and fit to push the block obliquely. 3 Moves into the accommodating groove so that the block 3 will not be blocked by the hook 21 when it moves upward. When the block 3 moves to disengage from the boss 11, the elastic member 34 pushes the block 3 to extend, and the movable buckle plate is at this time. 2 Moving upward will cause the holding surface 211 of the hook 21 to abut against the abutting surface 311 of the blocking block 3, and the blocking block 3 and the hook 21 will be held to achieve synchronous movement. Preferably, the second guide surface 112 and the first matching surface 32 are parallel to each other, which is more conducive to smoothly pushing the clamping block 3 to shrink.

7 to 9, in the closed state of the injection mold, the movable platen 55 is close to the fixed platen 45, the movable gusset 2 is located at the upper part of the movable groove 12, and the clamping block 3 is in the extended state, which is blocked by the limit plate 35. , the pull hook 21 of the movable buckle plate 2 enters the limiting slot 31 , the holding surface 211 abuts against the abutting surface 311 , so that the pull hook 21 and the locking block 3 are held. During the mold opening process, the fixed platen 45 is in a fixed position, the movable platen 55 moves down and away from the fixed platen 45, the clamping block 3 moves down and drives the movable gusset 2 to move, and the movable gusset 2 moves down along the movable groove 12, connecting the block. 22 drives the fixed die bottom needle assembly to move down.

10 to 13 , when the clamping block 3 moves to contact with the boss 11 of the fixed gusset 1 , the first guide surface 111 presses the second mating surface 33 , and the clamping block 3 compresses the elastic member 34 toward the accommodating groove During the internal movement, the clamping block 3 retracts and separates from the hook 21. At this time, the fixed mold bottom needle assembly stops moving, and the fixed mold inclined top core pulling and ejection are completed.

Referring to Fig. 14, the movable template 55 continues to move downward, the movable gusset 2 stops moving, the fixed mold assembly and the movable mold assembly are separated from each other, and the mold opening action is completed.

When the injection mold is reset and closed, the bottom of the boss 11 of the fixed gusset 1 and the hook 21 of the movable gusset 2 are in contact with the top of the clamping block 3, that is, the second guide surface 112 and the reset surface 212 and the first mating surface 32 are inclined to squeeze. Pressing, the clamping block 3 compresses the elastic member 34 and moves to the inside of the accommodating slot, and the movable template 55 can move upward freely. During the reset process of the movable platen 55, the reset rod in the mold is pushed to reset the bottom needle assembly of the fixed mold. After the clamping block 3 leaves the position of the boss 11 , the elastic member 34 deforms and recovers so that the clamping block 3 extends, and a clamping is formed between the clamping block 3 and the hook 21 of the movable buckle plate 2 . The movable die plate 55 returns to the position close to the fixed die plate 45 to complete the repositioning and clamping of the injection mold.

The injection mold of this embodiment solves the problem of ejection of the fixed mold through the buckle mechanism, and can realize core pulling and ejection of the inclined top of the fixed mold without setting up an additional power system, which saves the production cost, and the parts of the buckle machine are ingeniously coordinated. , the operation is reliable, so the injection mold has good practicability and promotion value.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (10)

1. The utility model provides an injection mold ejection structure, its characterized in that, includes fixed die plate (45), movable mould board (55), cover half end needle subassembly and at least one knot machine, the knot machine includes fixed buckle (1), activity buckle (2), connecting block (22), elastic component (34) and fixture block (3), fixed buckle (1) with fixed die plate (45) relative position is fixed, movable mould board (55) can move towards the direction of keeping away from fixed die plate (45), connecting block (22) are connected cover half end needle subassembly with activity buckle (2), make activity buckle (2) with cover half end needle subassembly synchronous motion, be equipped with the holding tank on movable mould board (55), fixture block (3) pass through elastic component (34) with the diapire of holding tank is connected, fixture block (3) can be in the holding tank flexible removal, activity buckle (2) are equipped with drag hook (21), drag hook (21) with fixture block (3) card is held, fixed buckle (1) is equipped with boss (11), boss (11) can activity buckle (2) move when predetermineeing the position with fixture block (3) cooperation, in order to overcome the elasticity of elastic component (34) makes fixture block (3) retract, thereby make fixture block (3) with drag hook (21) break away from.

2. The injection mold ejection structure according to claim 1, wherein a limiting groove (31) is formed in the fixture block (3), and the draw hook (21) can enter the limiting groove (31) to be clamped with the fixture block (3).

3. An injection mold ejection structure according to claim 2, wherein the limiting groove (31) has a limiting surface (312), a limiting plate (35) is disposed in the receiving groove, and the limiting plate (35) can abut against the limiting surface (312) to limit the protruding position of the fixture block (3).

4. The injection mold ejection structure according to claim 2, wherein the limiting groove (31) has a supporting surface (311), the draw hook (21) has a holding surface (211), and the holding surface (211) can abut against the supporting surface (311) to hold the draw hook (21) and the fixture block (3).

5. An injection mold ejection structure according to claim 4, wherein the draw hook (21) has a reset surface (212), the reset surface (212) is disposed on an opposite side of the catching surface (211), and the reset surface (212) is inclined toward the catching surface (211) in an extending direction of the draw hook (21).

6. An injection mold ejection structure according to claim 4, wherein the fixture block (3) has a first mating surface (32) and a second mating surface (33) which are oppositely arranged, and the first mating surface (32) and the second mating surface (33) are inclined toward the abutting surface (311) along the extending direction of the fixture block (3).

7. An injection mold ejection structure according to claim 4, wherein the boss (11) has a first guide surface (111) and a second guide surface (112) which are disposed oppositely, the first guide surface (111) and the second guide surface (112) being inclined toward the catching surface (211) in an extending direction of the boss (11).

8. An injection mold ejection structure according to claim 1, wherein an extension height of the boss (11) toward the block (3) is greater than an extension height of the hook (21) toward the block (3).

9. An injection mould ejection structure according to claim 1, characterised in that the fixed gusset (1) is provided with a movable slot (12), the movable gusset (2) being slidable within the movable slot (12).

10. An injection mold comprising the injection mold ejection structure of any of claims 1-9.

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