Injection mold

Abstract

The utility model relates to the technical field of molds, in particular to an injection mold which comprises a movable mold and a fixed mold which are closed to form a cavity, and further comprises a contact pin positioning piece and a contact pin pressing mechanism, the contact pin positioning piece is arranged on the fixed mold and provided with a positioning hole, and the contact pin pressing mechanism is arranged on the movable mold. The positioning hole is used for inserting the first part of the contact pin and enabling the second part of the contact pin to be located in the cavity, the contact pin pressing mechanism is connected to the movable mold and selectively loosens the contact pin or presses the contact pin on the contact pin positioning piece along with the movement of the movable mold, and an acute included angle is formed between the axial direction of the positioning hole and the movement direction of the movable mold. According to the utility model, the axial direction of the positioning hole of the contact pin positioning piece and the moving direction of the moving die form the acute included angle, and the contact pin is inserted into the positioning hole, so that the insertion direction of the contact pin is parallel to the axial direction of the positioning hole, and the insertion direction of the contact pin and the moving direction of the moving die form the acute included angle; the installation angle of the pin in the product is increased, and the requirement of product structure diversification is met.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an injection mold. Background Art

[0002] When products are injected, it is often necessary to embed pins in the injection molded products. The existing pin insertion direction is generally parallel or perpendicular to the direction of mold opening and closing (i.e. the movement direction of the movable mold when opening and closing the mold), resulting in a relatively single angle of the pin in the product, which is difficult to meet diverse product needs. Summary of the invention

[0003] The utility model aims to provide an injection mold to solve the problem that the existing pins have a single angle in the product.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: an injection mold, comprising a movable mold and a fixed mold, the movable mold and the fixed mold are closed to form a cavity, and also comprising a pin positioning piece and a pin clamping mechanism, the pin positioning piece is arranged in the fixed mold, the pin positioning piece is provided with a positioning hole, the positioning hole is used to plug the first part of the pin and make the second part of the pin located in the cavity, the pin clamping mechanism is connected to the movable mold and selectively releases the pin or presses the pin on the pin positioning piece as the movable mold moves, and the axial direction of the positioning hole forms an acute angle with the movement direction of the movable mold.

[0005] Furthermore, the acute angle is 30° to 60°.

[0006] Furthermore, the pin positioning member is a slanted top.

[0007] Furthermore, the force exerted by the pin clamping mechanism on the pin has a component force opposite to the ejection direction of the inclined ejector, so that the pin clamping mechanism can press the inclined ejector onto the fixed mold when pressing the pin onto the pin positioning member.

[0008] Furthermore, the pin positioning member is provided with a pin positioning surface, and the pin positioning surface faces the pin pressing mechanism, so as to enclose a part of the cavity together with the pin pressing mechanism.

[0009] Furthermore, there is a certain gap between the inner wall of the positioning hole and the plug pin, and the plug pin positioning member is also provided with an exhaust hole, and the exhaust hole is connected to the positioning hole, so that the gap and the exhaust hole form a part of the first exhaust channel.

[0010] Furthermore, the pin clamping mechanism includes a driving member fixedly connected to the movable mold and a sliding member slidably connected to the driving member. The driving member can move with the movement of the movable mold and drive the sliding member to move, so that the sliding member has a movement component along the axial direction of the positioning hole.

[0011] Furthermore, a sliding direction of the sliding member relative to the driving member is perpendicular to an axial direction of the positioning hole.

[0012] Further, the driving member is provided with two oppositely arranged first slide grooves, a first slide bar is formed between the two first slide grooves, the sliding member is provided with two oppositely arranged second slide bars, a second slide groove is formed between the two second slide bars, the first slide bar is inserted into the second slide groove to form a sliding connection between the two, the two second slide bars are respectively inserted into the two first slide grooves to form a sliding connection, and the extension direction of the first slide groove and the second slide groove is perpendicular to the axial direction of the positioning hole, so that the sliding member slides relative to the driving member in a direction perpendicular to the axial direction of the positioning hole.

[0013] Furthermore, the sliding member includes a first sliding block and a second sliding block which are spliced ​​together. The second sliding block is provided with a through hole. An exhaust insert is inserted into the through hole. There is a gap between the exhaust insert and the through hole to form a part of the second exhaust channel.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model sets the positioning hole of the pin positioning piece so that its axial direction forms an acute angle with the movement direction of the movable mold, and the pin is inserted in the positioning hole. Therefore, the insertion direction of the pin is parallel to the axial direction of the positioning hole, so that the insertion direction of the pin and the movement direction of the movable mold form an acute angle, thereby increasing the installation angle of the pin in the product and meeting the needs of diversified product structure.

[0016] 2. Insert the pin into the inclined top. When the inclined top ejects the injection-molded product, the pin can be ejected together with it. Then the product can be taken out in the opposite direction of the inserted pin, which can avoid interference between the inclined top and the pin and affect demolding.

[0017] 3. The pin positioning mechanism is linked to the movable mold, which can use the movement of the movable mold to compress the pin during injection molding, and can also form an operating space for installing the pin when opening the mold, which is conducive to the installation and fixation of the pin. At the same time, there is no need to set up an additional power source to drive the pin positioning mechanism, simplifying the mold structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model without a movable mold.

[0019] Figure 2It is a top view of an embodiment of the utility model without a movable mold.

[0020] Figure 3 yes Figure 2 AA section view.

[0021] Figure 4 It is a three-dimensional diagram of the pin positioning member of the embodiment of the utility model.

[0022] Figure 5 It is a cross-sectional view of a pin positioning member according to an embodiment of the utility model.

[0023] Figure 6 It is a three-dimensional diagram of the pin of the embodiment of the utility model.

[0024] Figure 7 It is an exploded view of the pin pressing mechanism of the embodiment of the utility model.

[0025] Figure 8 It is an exploded view of a sliding part of an embodiment of the utility model.

[0026] Among them: 1 fixed mold, 11 airway, 2 pin positioning parts, 21 positioning holes, 22 pin positioning surfaces, 23 exhaust holes, 3 pin clamping mechanisms, 31 driving parts, 311 first slide grooves, 312 first slide bars, 32 sliding parts, 321 second slide grooves, 322 second slide bars, 301 first sliders, 302 second sliders, 303 exhaust inserts.

[0027] 100 pin, 101 first part, 102 second part, 103 third part.

[0028] A cavity, F force, S1 ejection direction, S2 reset direction. DETAILED DESCRIPTION

[0029] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] See also Figures 1 to 3 , Figure 6As shown, the utility model discloses an injection mold, including a movable mold and a fixed mold 1, the movable mold and the fixed mold 1 are closed to form a cavity A, and also includes a pin positioning member 2 and a pin clamping mechanism 3, the pin positioning member 2 is arranged on the fixed mold 1, the pin positioning member 2 is provided with a positioning hole 21, the positioning hole 21 is used to plug the first part 101 of the pin 100 and make the second part 102 of the pin 100 located in the cavity A, the pin clamping mechanism 3 is connected to the movable mold and selectively releases the pin 100 or presses the pin 100 on the pin positioning member 2 as the movable mold moves, and the axial direction of the positioning hole 21 forms an acute angle with the moving direction of the movable mold. Among them, the moving direction of the movable mold includes the mold opening direction and the mold closing direction.

[0031] See also Figure 6 As shown, in this example, the plug pin 100 is a pin-shaped structure with two annular flanges, wherein the portion between one flange and the adjacent plug pin end is the first portion 101 of the plug pin 100, which is inserted into the positioning hole and protrudes from the product surface after injection molding is completed, the portion between the other flange and the adjacent plug pin end is the third portion 103 of the plug pin 100, which is inserted into the plug pin clamping mechanism 3 and protrudes from the other surface of the product after injection molding is completed, and the portion between the two flanges and the two flanges is the second portion 102 of the plug pin 100, which is located in the mold cavity A and is buried in the product after injection molding is completed. In other embodiments, the plug pin may also be of other structures, but it should be satisfied that its insertion direction is the same as the axial direction of the positioning hole, and after insertion, the first portion 101 of the plug pin remains in the plug pin positioning member 2, and the second portion 102 is located in the mold cavity and embedded in the product.

[0032] See also Figure 3 As shown, the acute angle formed by the axial direction of the positioning hole 21 and the moving direction of the movable mold is preferably 30° to 60°, and in this example, it is further preferably 45°. The pin positioning member 2 is a slanted top slidably arranged in the fixed mold 1, and the slanted top is provided with a pin positioning surface 22, and the pin positioning surface 22 faces the pin clamping mechanism 3, so as to enclose a part of the cavity A together with the pin clamping mechanism 3. The pin positioning surface 22 corresponds to the flange at the end of the first part 101. When the pin 100 is inserted into the positioning hole 21, the flange abuts against the pin positioning surface 22, and the second part 102 of the pin 100 protrudes from the positioning hole 21 and is located in the cavity A.

[0033] Since the pin positioning member 2 is a slanted top connected to the fixed mold 2 in a sliding manner, when the pin pressing mechanism 3 presses the pin 100, the pin 100 is subjected to the pressure of the pin pressing mechanism 3 and transmitted to the slanted top, which may push the slanted top in the direction of demolding. In order to avoid this problem, the force F exerted by the pin pressing mechanism 3 on the pin 100 should have a component force opposite to the slanted top ejection direction S1, so that the pin pressing mechanism 3 can press the slanted top on the fixed mold 1 when pressing the pin 100 on the pin positioning member 2. The direction of the force F exerted by the pin 100 on the slanted top forms an obtuse angle with the slanted top ejection direction S1, so that the force F exerted by the pin 100 on the slanted top has a component force along the slanted top reset direction S2 (the reset direction S2 is opposite to the ejection direction S1), preventing the slanted top from shifting under the action of the pin pressing mechanism 3 and maintaining the stability of the slanted top in the mold closing state. The direction of the force F applied by the pin 100 on the inclined top is perpendicular to the contact surface between the pin and the inclined top and toward the pin positioning member 2. The contact surface is the flange end surface of the pin (also the pin positioning surface 22).

[0034] See also Figure 7 As shown, the pin clamping mechanism 3 includes a driving member 31 fixedly connected to the movable mold and a sliding member 32 slidably connected to the driving member 31. The driving member 31 can move with the movement of the movable mold and drive the sliding member 32 to move, so that the sliding member 32 has an axial movement component along the positioning hole 21, so as to push the pin 100 toward the positioning hole 21 and clamp the pin 100. The driving member 31 is provided with two oppositely arranged first slide grooves 311, and a first slide bar 312 is formed between the two first slide grooves 311. The sliding member 32 is provided with two oppositely arranged second slide bars 322, and a second slide groove 321 is formed between the two second slide bars 322. The first slide bar 312 is inserted into the second slide groove 321 to form a sliding connection between the two. The two second slide bars 322 are respectively inserted into the two first slide grooves 311 to form a sliding connection, and the extension direction of the first slide groove 311 and the second slide groove 321 is perpendicular to the axial direction of the positioning hole 21, so that the sliding member 32 slides relative to the driving member 31 along a direction perpendicular to the axial direction of the positioning hole 21.

[0035] See also Figures 3 to 5 As shown, in this example, the pin positioning member 2 is provided with an open groove, and the positioning hole 21 is provided at the bottom of the open groove, so that the open groove forms a part of the cavity, making the cavity side wall structure at the open groove complex, and it is easy to form air entrapment at the corner of the open groove during injection molding, thereby causing the injection molding quality to decline. In addition, the pin 100 of this example has multiple corners, which is also easy to cause air entrapment. In order to avoid air entrapment, two exhaust channels are formed on both sides of the cavity A.

[0036] There is a certain gap between the inner wall of the positioning hole 21 and the pin 100, and the pin positioning member 2 is also provided with an exhaust hole 23, which is connected to the positioning hole 21, so that the gap between the inner wall of the positioning hole 21 and the pin 100 and the exhaust hole 23 form a part of the first exhaust channel. This part of the first exhaust channel is also connected to the air channel 11 on the fixed mold 1 to exhaust smoothly, thereby forming a complete first exhaust channel to prevent air from being trapped and affecting the injection quality.

[0037] See also Figure 3 and Figure 8 As shown, in this example, the sliding member 32 is formed by splicing a first slider 301 and a second slider 302. The second slider 302 is provided with a through hole, and an exhaust insert 303 is inserted into the through hole. There is a gap between the exhaust insert 303 and the through hole to form a part of the second exhaust channel. In addition, an air channel is provided between the first slider 301 and the second slider 302, so that the air channel and the gap between the exhaust insert 303 and the through hole together form a complete second exhaust channel. The second exhaust channel is used to exhaust the gas on the side of the cavity A close to the pin clamping mechanism 3. The first exhaust channel and the second exhaust channel cooperate to exhaust the gas in the cavity from both sides to prevent trapped gas from affecting the injection molding quality of the product.

[0038] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. An injection mold, comprising a movable mold and a fixed mold, the movable mold and the fixed mold are closed to form a cavity, characterized in that: It also includes a pin positioning piece and a pin clamping mechanism, the pin positioning piece is arranged on the fixed mold, the pin positioning piece is provided with a positioning hole, the positioning hole is used to insert the first part of the pin and make the second part of the pin located in the cavity, the pin clamping mechanism is connected to the movable mold and selectively releases the pin or presses the pin on the pin positioning piece as the movable mold moves, and the axial direction of the positioning hole forms an acute angle with the movement direction of the movable mold.

2. An injection mold according to claim 1, characterized in that: The acute angle is 30° to 60°.

3. An injection mold according to claim 1, characterized in that: The pin positioning piece is a bevel top.

4. An injection mold according to claim 3, characterized in that: The force exerted by the pin clamping mechanism on the pin has a component force opposite to the ejection direction of the inclined ejector, so that the pin clamping mechanism can press the inclined ejector onto the fixed mold when pressing the pin onto the pin positioning member.

5. The injection mold according to claim 1, characterized in that: The pin positioning piece is provided with a pin positioning surface, and the pin positioning surface faces the pin pressing mechanism, so as to enclose a part of the cavity together with the pin pressing mechanism.

6. An injection mold according to claim 5, characterized in that: There is a gap between the inner wall of the positioning hole and the plug pin, and the plug pin positioning member is further provided with an exhaust hole, and the exhaust hole is connected to the positioning hole, so that the gap and the exhaust hole form a part of the first exhaust channel.

7. The injection mold according to claim 1, characterized in that: The pin clamping mechanism includes a driving member fixedly connected to the movable mold and a sliding member slidably connected to the driving member. The driving member can move with the movement of the movable mold and drive the sliding member to move, so that the sliding member has a movement component along the axial direction of the positioning hole.

8. An injection mold according to claim 7, characterized in that: The sliding direction of the sliding member relative to the driving member is perpendicular to the axial direction of the positioning hole.

9. An injection mold according to claim 8, characterized in that: The driving member is provided with two first sliding grooves arranged opposite to each other, a first slide bar is formed between the two first sliding grooves, the sliding member is provided with two second sliding bars arranged opposite to each other, a second sliding groove is formed between the two second sliding bars, the first slide bar is inserted into the second sliding groove to form a sliding connection between the two, the two second sliding bars are respectively inserted into the two first sliding grooves to form a sliding connection, and the extension direction of the first sliding groove and the second sliding groove is perpendicular to the axial direction of the positioning hole, so that the sliding member slides relative to the driving member in a direction perpendicular to the axial direction of the positioning hole.

10. The injection mold according to claim 7, characterized in that: The sliding member comprises a first sliding block and a second sliding block which are spliced ​​together. The second sliding block is provided with a through hole. An exhaust insert is inserted into the through hole. There is a gap between the exhaust insert and the through hole to form a part of a second exhaust channel.

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