Mold core-pulling flicking needle structure for interior trim part with air holes

Abstract

The utility model relates to a mould core-pulling elastic needle structure with an air hole interior trim part, a fixed mould side and a movable mould side are mutually matched to form a closed cavity, the fixed mould side is arranged on a base plate, an elastic needle channel for accommodating a core-pulling elastic needle is arranged in a fixed mould side body, the core-pulling elastic needle and an elastic needle seat are mutually connected in the elastic needle channel, and the movable mould side is arranged on the base plate. The bottom of the elastic needle base abuts against the surface of the base plate, the top of the core-pulling elastic needle extends into a cavity formed by the fixed mold side and the movable mold side after protruding out of the elastic needle channel, a boss face is arranged at the position, corresponding to the movable mold side, of the top of the core-pulling elastic needle, the boss face presses the top of the core-pulling elastic needle, and the cavity is used for injection molding of produced products. The bouncing needle base is of a cylinder structure, and an ejection spring arranged in a bouncing needle base body abuts against the surface of the cushion plate downwards to form elastic fit. The hole site of an injection molding product is formed by the core-pulling vibrating needle, the structure is stable and reliable, the front end of the core-pulling vibrating needle is tightly attached to the movable mold side to achieve effective glue sealing, and flash of the hole site is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially a mold core-pulling pin structure of interior trim part with air hole. BACKGROUND

[0002] In product injection production technology, injection mold is a kind of commonly used mold for forming plastic part, and various plastic parts can be formed by injection mold to meet the various needs of people. Injection mold mainly includes fixed mold and movable mold, and the fixed mold is installed on the fixed base plate of injection molding machine, and the movable mold is installed on the movable base plate of injection molding machine. When injection molding, the fixed mold and the movable mold are closed, and the plastic enters the mold cavity through the nozzle. When the mold is opened, the fixed mold and the movable mold are separated, and then the ejection mechanism acts to eject the injection molded part. Due to various process requirements of the plastic part, sometimes a hole or a groove structure needs to be formed on the side wall of the plastic part, and the corresponding injection mold is provided with a corresponding side core-pulling mechanism and an ejection mechanism to form a hole or a groove structure on the molded product.

[0003] For the product of interior trim covering part requiring vacuum suction process, a vacuum suction hole needs to be formed on the plastic part, and the size of the hole cannot affect the suction effect of the product, and there is no appearance defect after covering. The conventional hole product needs to directly form a hole position boss on the mold core or the cavity side, so the boss size is small, the strength is weak, and the product failure caused by fracture and falling off easily occurs. INVENTION CONTENTS

[0004] In view of the defects of the existing technology, such as small boss size, weak strength, easy fracture and falling off leading to product failure, the present application provides a mold core-pulling pin structure of interior trim part with air hole, which can form the hole position of the injection molded product by core-pulling pin, and the structure is stable and reliable. The front end of the core-pulling pin tightly contacts the movable mold side to effectively seal the glue and avoid the occurrence of flash on the hole position.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A mold core-pulling pin structure of interior trim part with air hole, the fixed mold side and the movable mold side cooperate to form a closed cavity, the fixed mold side is arranged on the pad, a pin channel for accommodating the core-pulling pin is formed in the body of the fixed mold side, the core-pulling pin and the pin seat are connected with each other in the pin channel, the bottom of the pin seat abuts against the surface of the pad, the top of the core-pulling pin protrudes out of the pin channel and extends into the cavity formed by the fixed mold side and the movable mold side, a boss surface is arranged at the position of the movable mold side corresponding to the top of the core-pulling pin, the boss surface presses the top of the core-pulling pin, the cavity formed by the fixed mold side and the movable mold side is used for injection molding production, the pin seat adopts a cylindrical structure, and the ejection spring arranged in the body of the pin seat abuts against the surface of the pad downward to form elastic cooperation.

[0007] As a further improvement of the above technical solution:

[0008] The pin channel formed in the fixed mold side body extends from the contact surface between the fixed mold side and the pad to the cavity formed by the fixed mold side and the movable mold side.

[0009] The pin channel in the fixed mold side body includes a first section channel, a second section channel and a third section channel, which are sequentially narrowed from bottom to top, the inner diameter of the first section channel is greater than that of the second section channel, and the inner diameter of the second section channel is greater than that of the third section channel, wherein the first section channel is used for accommodating the pin seat, and the second section channel and the third section channel are used for accommodating the core-pulling pin.

[0010] The bottom of the core-pulling pin is provided with a head, and the rod part of the core-pulling pin includes a first section pin and a second section pin, which are sequentially narrowed from bottom to top, and the diameter of the first section pin is greater than that of the second section pin.

[0011] The first section pin is arranged in the second section channel of the pin channel, and the second section pin is arranged in the third section channel of the pin channel.

[0012] The top of the pin seat body has a cylindrical protrusion, the diameter of the protrusion is smaller than the diameter of the body of the pin seat, the pin fixing block is sleeved on the protrusion at the top of the pin seat, and the pin fixing block and the pin seat are connected by a transversely arranged positioning pin.

[0013] The pin fixing block arranged at the top of the pin seat adopts a circular sleeve structure, and the pin fixing block has a first section hole, a second section hole and a third section hole, which are sequentially narrowed from bottom to top, the inner diameter of the first section hole is greater than that of the second section hole, and the inner diameter of the second section hole is greater than that of the third section hole; the protrusion at the top of the pin seat is accommodated in the first section hole of the pin fixing block, the head at the bottom of the core-pulling pin is accommodated in the second section hole of the pin fixing block, and the rod part of the core-pulling pin is accommodated in the third section hole of the pin fixing block and extends from the top of the pin fixing block.

[0014] The first section pin of the core-pulling pin extends into the second section channel of the pin channel, and the second section pin extends from the top of the third section channel of the pin channel and cooperates with the boss surface of the movable mold side.

[0015] A reinforcing sleeve is sleeved on the outer periphery of the first section pin of the core-pulling pin, the reinforcing sleeve is accommodated in the second section channel in the fixed mold side, and the outer diameter of the reinforcing sleeve is smaller than the inner diameter of the second section channel in the fixed mold side.

[0016] The reinforcing sleeve adopts a circular sleeve structure, and the reinforcing sleeve is made of elastic material.

[0017] A through hole for accommodating the ejecting spring is formed downward in the pin seat body, and the ejecting spring is located inside the pin seat and abuts against the surface of the pad downward.

[0018] The utility model discloses the beneficial effect is as follows:

[0019] The utility model discloses the hole position of injection moulded product is by core -pulling elastic needle forming, can control the machining precision of hole position, and it is convenient to match the mould. The utility model discloses stable and reliable structure can avoid the factor of machining precision, causes the original body hole position structure to appear to break or bruise, reduces the development cost of mould. The core -pulling elastic needle is under the action of bottom spring, makes the core -pulling elastic needle front end tightly close to the side of movable mould to reach effective glue sealing, avoids the burr of hole position, promotes product qualified rate. For the elastic needle structure of the utility model is reliable and the method of smaller production cost for the conventional product with hole. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the schematic diagram of the utility model.

[0021] Figure 2 It is the enlarged view of A part in Figure 1

[0022] Figure 3 It is the enlarged view of B part in Figure 1

[0023] Figure 4 It is the schematic diagram of the core -pulling elastic needle of the utility model.

[0024] Figure 5 It is the section view of the core -pulling elastic needle of the utility model.

[0025] Marked as in the drawing: 1, fixed mould side;2, movable mould side;3, backing plate;4, core -pulling elastic needle;5, elastic needle fixed block;6, positioning pin;7, elastic needle seat;8, ejection spring;9, reinforcing kit;10, product. DETAILED DESCRIPTION

[0026] The preferred embodiment of the utility model will be described in detail below in conjunction with the drawings.

[0027] Refer to Figures 1 to 5 ​​As shown, the mold core-pulling pin structure of the interior part with air holes, which has a mold composed of a fixed mold and a movable mold, the fixed mold side 1 and the movable mold side 2 cooperatively form a closed cavity, the fixed mold side 1 is arranged on the base plate 3, the fixed mold side 1 is attached to the surface of the base plate 3, a pin channel accommodating the core-pulling pin 4 is arranged in the fixed mold side 1, and the pin channel extends from the contact surface of the fixed mold side 1 and the base plate 3 to the cavity formed by the fixed mold side 1 and the movable mold side 2. The core-pulling pin 4 and the pin seat 7 are connected to each other in the pin channel, the bottom of the pin seat 7 is abutted against the surface of the base plate 3, the top of the pin seat 7 is connected to the core-pulling pin 4 in the same direction, the top of the core-pulling pin 4 protrudes from the pin channel and extends into the cavity formed by the fixed mold side 1 and the movable mold side 2, a boss surface is arranged at the position of the movable mold side 2 corresponding to the top of the core-pulling pin 4, the boss surface is vertically matched with the top of the core-pulling pin 4, and the boss surface presses the top of the core-pulling pin 4. The cavity formed by the fixed mold side 1 and the movable mold side 2 is used for injection molding to produce the product 10, and the product 10 with air holes can be formed.

[0028] The pin channel in the fixed mold side 1 body includes a first section channel, a second section channel and a third section channel sequentially narrowing from bottom to top, the inner diameter of the first section channel is greater than that of the second section channel, and the inner diameter of the second section channel is greater than that of the third section channel, wherein the first section channel is used for accommodating the pin seat 7, the second section channel and the third section channel are used for accommodating the core-pulling pin 4, the bottom of the core-pulling pin 4 is provided with a head, and the rod part of the core-pulling pin 4 includes a first section pin and a second section pin sequentially narrowing from bottom to top, and the diameter of the first section pin is greater than that of the second section pin. Wherein, the first section pin is arranged in the second section channel of the pin channel, and the second section pin is arranged in the third section channel of the pin channel.

[0029] The pin seat 7 adopts a cylindrical structure, a through hole accommodating the ejection spring 8 is arranged downward in the pin seat 7 body, the ejection spring 8 is located in the interior of the pin seat 7 and abuts against the surface of the base plate 3 downward to form elastic cooperation. The top of the pin seat 7 body has a cylindrical protrusion, the diameter of the protrusion is smaller than the body diameter of the pin seat 7. A pin fixing block 5 is arranged at the top of the pin seat 7, the pin fixing block 5 adopts a circular sleeve structure, and the first section hole, the second section hole and the third section hole sequentially narrowing from bottom to top are arranged in the interior of the pin fixing block 5, the inner diameter of the first section hole of the pin fixing block 5 is greater than that of the second section hole, and the inner diameter of the second section hole is greater than that of the third section hole.

[0030] The ejector pin fixing block 5 is sleeved on the protrusion on the top of the ejector pin seat 7, and is connected by a transversely arranged positioning pin 6 penetrating the ejector pin fixing block 5 and the ejector pin seat 7. The protrusion on the top of the ejector pin seat 7 is accommodated in the first section hole of the ejector pin fixing block 5, the head of the bottom of the core-pulling ejector pin 4 is accommodated in the second section hole of the ejector pin fixing block 5, the rod part of the core-pulling ejector pin 4 is accommodated in the third section hole of the ejector pin fixing block 5, and the rod part of the core-pulling ejector pin 4 extends from the top of the ejector pin fixing block 5. The first section ejector pin of the core-pulling ejector pin 4 extends into the second section channel of the ejector pin channel, and the second section ejector pin extends from the top of the third section channel of the ejector pin channel and cooperates with the boss surface of the movable mold side 2.

[0031] Preferably, a reinforcing sleeve 9 is sleeved on the outer periphery of the first section ejector pin of the core-pulling ejector pin 4, the reinforcing sleeve 9 adopts a circular sleeve structure, the reinforcing sleeve 9 is made of elastic material, the reinforcing sleeve 9 is accommodated in the second section channel in the fixed mold side 1, and the outer diameter of the reinforcing sleeve 9 is smaller than the inner diameter of the second section channel in the fixed mold side 1, so that a slight gap is formed. When the core-pulling ejector pin 4 is subjected to improper pressure, the reinforcing sleeve 9 plays a role in protecting the core-pulling ejector pin 4 and preventing the core-pulling ejector pin 4 from being broken.

[0032] In the implementation of the utility model, the ejector pin structure composed of the core-pulling ejector pin 4 and the ejector pin seat 7 is fixedly installed in the ejector pin channel in the fixed mold side 1, in the initial state, the ejector pin structure is pushed out by about 0.2mm in height in the ejector pin channel by the ejection spring 8 at the bottom of the ejector pin seat 7, when the mold is closed and the fixed mold side 1 and the movable mold side 2 cooperate, the boss surface of the movable mold side 2 corresponding to the core-pulling ejector pin 4 presses the top of the core-pulling ejector pin 4 and keeps pressure adhesion with the core-pulling ejector pin 4. In the injection molding, the position of the core-pulling ejector pin 4 is used to form the air hole needed to be provided on the product 10. When the mold is opened after the injection molding is completed, the core-pulling ejector pin 4 remains in the fixed mold side 1, and the product 10 formed in the cavity remains on the movable mold side 2 and retreats together from the core-pulling ejector pin 4, and finally the demolding is completed.

[0033] In the implementation of the utility model, the ejector pin structure composed of the core-pulling ejector pin 4 and the ejector pin seat 7 is fixedly installed in the fixed mold side 1, in the initial state, the ejector pin structure is pushed out by about 0.2mm in height in the ejector pin channel by the ejection spring 8 at the bottom of the ejector pin seat 7, when the mold is closed and the fixed mold side 1 and the movable mold side 2 cooperate, the boss surface of the movable mold side 2 corresponding to the core-pulling ejector pin 4 presses the top of the core-pulling ejector pin 4 and keeps pressure adhesion with the core-pulling ejector pin 4. In the implementation of the utility model, the position of the core-pulling ejector pin 4 is used to form the air hole needed to be provided on the product 10. When the mold is opened after the injection molding is completed, the core-pulling ejector pin 4 remains in the fixed mold side 1, and the product 10 formed in the cavity remains on the movable mold side 2 and retreats together from the core-pulling ejector pin 4, and finally the demolding is completed.

[0034] Finally, it is explained that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A mold core-pulling spring pin structure with vented interior parts, characterized in that: The fixed mold side (1) and the movable mold side (2) cooperate to form a closed cavity, the fixed mold side (1) is arranged on the pad (3), the body of the fixed mold side (1) is provided with a needle channel for accommodating the core-pulling needle (4), the core-pulling needle (4) and the needle seat (7) are connected in the needle channel, the bottom of the needle seat (7) abuts against the surface of the pad (3), the top of the core-pulling needle (4) extends out of the needle channel and extends into the cavity formed by the fixed mold side (1) and the movable mold side (2), a boss surface is arranged at the position of the movable mold side (2) corresponding to the top of the core-pulling needle (4), the boss surface presses the top of the core-pulling needle (4), the cavity formed by the fixed mold side (1) and the movable mold side (2) is used for injection molding to produce a product (10), the needle seat (7) adopts a cylindrical structure, the ejector spring (8) arranged in the body of the needle seat (7) abuts against the surface of the pad (3) to form an elastic fit.

2. The vented trim part core pin structure of claim 1, wherein: The needle channel arranged in the body of the fixed mold side (1) extends from the contact surface of the fixed mold side (1) and the pad (3) to the cavity formed by the fixed mold side (1) and the movable mold side (2).

3. The vented trim part mold core pin structure of claim 1, wherein: The needle channel in the body of the fixed mold side (1) includes a first section channel, a second section channel and a third section channel which are sequentially narrowed from bottom to top, the inner diameter of the first section channel is greater than that of the second section channel, and the inner diameter of the second section channel is greater than that of the third section channel, wherein the first section channel is used for accommodating the needle seat (7), and the second section channel and the third section channel are used for accommodating the core-pulling needle (4).

4. The vented trim part core pin structure of claim 3, wherein: The bottom of the core-pulling needle (4) is provided with a head, the rod part of the core-pulling needle (4) includes a first section needle and a second section needle which are sequentially narrowed from bottom to top, the diameter of the first section needle is greater than that of the second section needle, wherein the first section needle is arranged in the second section channel of the needle channel, and the second section needle is arranged in the third section channel of the needle channel.

5. The vented trim part core pin structure of claim 4, wherein: The top of the body of the needle seat (7) has a cylindrical protrusion, the diameter of the protrusion is smaller than the diameter of the body of the needle seat (7), the needle fixing block (5) is sleeved on the protrusion at the top of the needle seat (7), and the needle fixing block (5) and the needle seat (7) are connected through the transversely arranged positioning pin (6).

6. The vented trim piece mold core pop pin structure of claim 5, wherein: The needle fixing block (5) arranged at the top of the needle seat (7) adopts a circular sleeve structure, and the inside of the needle fixing block (5) is provided with a first section hole, a second section hole and a third section hole which are sequentially narrowed from bottom to top, the inner diameter of the first section hole is greater than that of the second section hole, and the inner diameter of the second section hole is greater than that of the third section hole; the protrusion at the top of the needle seat (7) is accommodated in the first section hole of the needle fixing block (5), the head at the bottom of the core-pulling needle (4) is accommodated in the second section hole of the needle fixing block (5), and the rod part of the core-pulling needle (4) is accommodated in the third section hole of the needle fixing block (5) and extends out of the top of the needle fixing block (5).

7. The vented trim piece mold core pin structure of claim 6, wherein: The first section needle of the core-pulling needle (4) extends into the second section channel of the needle channel, and the second section needle extends out of the top of the third section channel of the needle channel and cooperates with the boss surface of the movable mold side (2).

8. The vented trim part core pin structure of claim 4, wherein: The reinforcing sleeve (9) is sleeved on the outer periphery of the first section of the core-pulling needle (4), is accommodated in the second section channel in the fixed mold side (1), and has an outer diameter smaller than an inner diameter of the second section channel in the fixed mold side (1).

9. The vented trim piece mold core pin structure of claim 8, wherein: The reinforcing sleeve (9) has a circular sleeve structure and is made of an elastic material.

10. The vented trim part core pin structure of claim 1, wherein: The body of the needle seat (7) is downwardly provided with a through hole for accommodating the ejection spring (8), and the ejection spring (8) is located in the interior of the needle seat (7) and downwardly abuts against the surface of the cushion plate (3).

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