Production device and production process for plastic strip binding needles

Abstract

The invention discloses a production device of a plastic strip binding needle, which comprises a static die and a movable die which are oppositely arranged, and a cooling fan which is arranged towards the movable die, the static die and the movable die are closed to form a die cavity, the static die is provided with a runner and a material injection channel which are communicated with the die cavity, and the static die is provided with an ejector pin which can be inserted into the material injection channel. The static mold and the movable mold are closed, molten raw materials are injected into the mold cavity, the cooling fan blows to the movable mold, then the cooled and formed plastic staples are separated from the movable mold more easily during mold opening, the plastic staples on the static mold are further cooled through the cooling fan after mold opening, the production efficiency of products is improved, and after the plastic staples are completely cooled, the product quality is improved. The plastic staples on the static mold are ejected by moving the ejector pin, so that the demolding efficiency of a product is improved, and the demolding and material taking of the product are more reliable as the product is cooled twice and ejected by the ejector pin.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic staple production, in particular to a production device and a production process for plastic strip-bound staples. Background Art

[0002] Plastic needles, also known as rubber needles and plastic staples, are a common plastic fastener. They are usually made of nylon, ABS and other materials through injection molding. Currently, they are widely used to fix clothing tags, socks, towels and other objects.

[0003] Existing injection molds for plastic staples consist of a static mold and a dynamic mold. By combining the static and dynamic molds, a mold cavity is formed for the injection molding of the plastic staple. Molten material is then injected into the cavity. After cooling and forming, the material can be opened to remove the material. However, during the mold opening process, the plastic staples tend to adhere tightly to the mold cavity surfaces of the static and dynamic molds, making demolding and material removal difficult. Forced demolding can also easily tear the plastic staples, necessitating urgent improvements. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a production device and a production process for plastic strip binding staples.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A production device for plastic strip binding staples includes a static mold and a dynamic mold arranged opposite to each other, and a cooling fan arranged toward the dynamic mold. The static mold and the dynamic mold are combined to form a mold cavity. A flow channel and an injection channel connecting the mold cavity are opened on the static mold. The static mold is provided with an ejector pin that can be inserted into the injection channel.

[0007] Preferably, a through groove corresponding to the inside and outside of the injection channel is provided on the static mold, and one end of the ejector pin is inserted into the through groove.

[0008] Preferably, the movable mold is provided with an exhaust hole connected to the mold cavity, and the other end of the exhaust hole is connected to the receiving groove of the movable mold.

[0009] Preferably, a notch is provided on the movable mold, a pressure plate passing through the notch is provided on the static mold, an inclined abutment surface is provided on the side wall of the notch, and the pressure plate presses downward on the abutment surface.

[0010] Preferably, a push plate is fixed on the movable mold, and a top plate is correspondingly provided on the push plate. The top plate abuts against the push plate and drives the abutting surface to press against the pressure plate.

[0011] Preferably, a slide groove is provided on the static mold, a slide bar is provided on the movable mold and slides in the slide groove, the abutment surface presses against the pressure plate along the slide groove direction, the mold cavity is provided in the static mold, and the movable mold is sealed at the upper end of the mold cavity.

[0012] Preferably, a material delivery pipe communicating with the flow channel is fixed on the static mold.

[0013] The present invention also discloses a production process for plastic strip binding staples, comprising the following steps:

[0014] 1) Mold closing and injection molding: The static mold and the movable mold are closed and the molten raw material is injected into the mold cavity. The ejector is inserted and the injection channel is closed;

[0015] 2) Primary cooling and mold opening: The cooling fan blows toward the movable mold, so that the temperature of the movable mold side drops faster than that of the static mold side. Then, when the mold is opened, the cooled plastic staples are easier to separate from the movable mold;

[0016] 3) Secondary cooling and demoulding: The cooling fan further cools the plastic staples on the static mold. After the plastic staples are completely cooled, the ejector moves to eject the plastic staples on the static mold and demould.

[0017] Preferably, in step 2), the abutment surface is pressed against the pressure plate to drive the movable mold to be pressed onto the static mold. When the mold needs to be opened, the movable mold is driven to move along the slide groove to separate the pressure plate and the abutment surface. At this time, the movable mold and the static mold move relative to each other, and the plastic staples are driven to separate from the movable mold through the staggered shear force.

[0018] Preferably, in step 1), the ejector pin is located in the through groove during injection. When the injection is completed, the ejector pin moves and blocks the injection channel. At this time, the molten raw material in the flow channel can be extracted outward.

[0019] The beneficial effects of the present invention are:

[0020] 1. The static mold and the movable mold are closed and molten raw materials are injected into the mold cavity. The cooling fan blows towards the movable mold, which cools the formed plastic staples when the mold is opened, making it easier to separate from the movable mold. After the mold is opened, the cooling fan further cools the plastic staples on the static mold, thereby improving product production efficiency. After the plastic staples are completely cooled, the plastic staples on the static mold are ejected by the ejector, thereby improving product demoulding efficiency. Because the product is cooled twice and ejected by the ejector, the product demoulding and material removal are more reliable.

[0021] 2. The movable mold moves in an alternating manner relative to the static mold to open the mold. This allows the plastic staples to be more easily separated from the movable mold through the alternating shear force during the movement, avoiding close adhesion to the movable mold that would cause demoulding difficulties, and even causing the plastic staples to be torn apart during mold opening, making the mold opening of the plastic staples more reliable and efficient.

[0022] 3. After the injection is completed, the ejector pin can move and block the injection channel. At this time, the molten raw material in the flow channel can be extracted to recover the molten raw material. At the same time, it prevents the molten raw material remaining in the flow channel from cooling and solidifying, affecting the injection production of subsequent products, thereby ensuring the efficiency of subsequent product production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a partial explosion schematic diagram of the present invention;

[0025] Figure 3 A cross-sectional view of the present invention Figure 1 ;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0027] Figure 5 Schematic diagram of the cooperation between the static mold and the ejector pin of the present invention Figure 1 ;

[0028] Figure 6 Schematic diagram of the cooperation between the static mold and the ejector pin of the present invention Figure 2 ;

[0029] Figure 7 Schematic cross-sectional view of the static mold of the present invention;

[0030] Figure 8 A cross-sectional view of the present invention Figure 2 .

[0031] In the figure: static mold 1, material delivery pipe 11, runner 12, chute 13, through groove 14, injection channel 15, pressure plate 16, movable mold 2, exhaust hole 21, containing groove 22, abutment plate 23, notch 24, abutment surface 241, slide bar 25, mold cavity 3, ejector pin 4, cooling fan 5, top plate 6. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0033] In the description of this specification, the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0034] like Figures 1-8As shown, a production device for plastic strip binding staples includes a static mold 1 and a dynamic mold 2 arranged opposite to each other, and a cooling fan 5 arranged toward the dynamic mold 2. The cooling fan 5 is arranged on one side of the static mold 1 and the dynamic mold 2 and is inclined toward the dynamic mold 2. The cooling fan 5 provides air cooling for the cooling and molding of the plastic staples. The static mold 1 and the dynamic mold 2 are combined to form a mold cavity 3. The mold cavity 3 is used for injection molding rows of long plastic staples. A flow channel 12 and an injection channel 15 connecting the mold cavity 3 are provided on the static mold 1. A feed pipe 11 connecting the flow channel 12 is fixed on the static mold 1. The feed pipe 11 injects molten raw material into the mold cavity 3 through the flow channel 12 and the injection channel 15, so that the plastic staples are cooled and molded in the mold cavity 3.

[0035] Furthermore, the static mold 1 is provided with an ejector pin 4 that can be inserted into the injection channel 15. The static mold 1 is provided with a through groove 14 corresponding to the inside and outside of the injection channel 15. When injecting material into the mold cavity 3, one end of the ejector pin 4 is inserted into the through groove 14 to prevent the ejector pin 4 from interfering with the injection operation.

[0036] The movable mold 2 is provided with an exhaust hole 21 connected to the mold cavity 3 to discharge the air in the mold cavity 3 during the injection process through the exhaust hole 21. The other end of the exhaust hole 21 is connected to the receiving groove 22 of the movable mold 2. The receiving groove 22 is used to temporarily store overflowing molten raw materials. The groove structure of the receiving groove 22 enhances the efficiency and effect of the cooling fan 5 in cooling the movable mold 2. Therefore, when the mold is opened, the plastic staples formed by cooling can be more easily separated from the movable mold 2 with a lower temperature.

[0037] After the injection into the mold cavity 3 is completed, the ejector pin 4 can move and block the injection channel 15. At this time, the molten raw material in the runner 12 can be extracted outward through the feed pipe 11 to recycle the molten raw material, thereby preventing the molten raw material remaining in the runner 12 from cooling and solidifying, affecting the injection production of subsequent products, and thus ensuring the high efficiency of subsequent product production.

[0038] The movable mold 2 is provided with a notch 24, and the static mold 1 is provided with a pressing plate 16 that passes through the notch 24. The notch 24 is larger than the pressing plate 16 so that the pressing plate 16 can slide back and forth relative to the notch 24 (refer to Figure 8 As shown in the direction, a tilted abutment surface 241 is provided on the side wall of the notch 24, and the pressing plate 16 presses downward on the abutment surface 241 to drive the movable mold 2 to be pressed downward onto the static mold 1.

[0039] Specifically, abutment plate 23 is fixed on the movable mold 2, and a top plate 6 is correspondingly provided on the abutment plate 23. The top plate 6 abuts against the abutment plate 23 and drives the abutment surface 241 to press against the pressure plate 16 to ensure that the movable mold 2 can be reliably pressed against the static mold 1.

[0040] The static mold 1 is provided with a slide groove 13, and the movable mold 2 is provided with a slide bar 25 slidingly arranged in the slide groove 13. The slide bar 25 can slide along the front and rear directions of the slide groove 13, and then the abutment surface 241 can be displaced with the movable mold 2, that is, the abutment surface 241 is displaced along the direction of the slide groove 13 and pressed against the pressure plate 16.

[0041] The mold cavity 3 is opened in the static mold 1, and the movable mold 2 is sealed at the upper end of the mold cavity 3. When the mold needs to be opened, the movable mold 2 can be driven to move along the slide groove 13 to separate the pressure plate 16 and the abutment surface 241 from each other. At this time, the movable mold 2 and the static mold 1 move relative to each other and can be driven upward to move the movable mold 2 away from the static mold 1. The plastic staples are driven to separate from the movable mold 2 through the staggered shear force, making it easier for the plastic staples to separate from the movable mold 2, thereby avoiding the plastic staples from being tightly adhered to the movable mold 2 and causing difficulty in demolding, and even tearing the plastic staples when opening the mold, so as to ensure that the mold opening of the plastic staples is more reliable and efficient.

[0042] After the mold is opened, the plastic staples on the static mold 1 are further cooled by the cooling fan 5, and the cooling fan 5 blows directly on the basically cooled plastic staples to accelerate the complete cooling of the plastic staples, thereby improving the production efficiency of the product. After the plastic staples are completely cooled, the plastic staples on the static mold 1 are moved and ejected by the ejector pin 4, thereby improving the demoulding efficiency of the product. Moreover, since the product is cooled twice and ejected by the ejector pin 4, the demoulding and material removal of the product are more reliable.

[0043] This embodiment also discloses a production process for plastic strip binding staples, comprising the following steps:

[0044] 1) Mold closing and injection molding: The static mold 1 and the movable mold 2 are closed and the molten raw material is injected into the mold cavity 3. The ejector pin 4 extends into and closes the injection channel 15;

[0045] 2) Primary cooling and mold opening: The cooling fan 5 blows toward the movable mold 2, so that the temperature of the movable mold 2 side drops faster than that of the static mold 1 side. Then, when the mold is opened, the cooled plastic staples are more easily separated from the movable mold 2;

[0046] 3) Secondary cooling and demoulding: The cooling fan 5 further cools the plastic staples on the static mold 1. After the plastic staples are completely cooled, the ejector pin 4 moves to eject the plastic staples on the static mold 1 and demould.

[0047] In step 2), the abutment surface 241 presses against the pressure plate 16 to drive the movable mold 2 to be pressed onto the static mold 1. When the mold needs to be opened, the movable mold 2 is driven to move along the slide groove 13 to separate the pressure plate 16 and the abutment surface 241 from each other. At this time, the movable mold 2 and the static mold 1 move relative to each other, and the plastic staples are driven out of the movable mold 2 by the staggered shear force.

[0048] In step 1), the ejector pin 4 is located in the through groove 14 during injection. When the injection is completed, the ejector pin 4 moves and blocks the injection channel 15. At this time, the molten raw material in the flow channel 12 can be extracted to allow the raw material to be recycled.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A production device for plastic strip binding staples, comprising a stationary mold (1) and a movable mold (2) arranged opposite to each other, and a cooling fan (5) arranged toward the movable mold (2), wherein the stationary mold (1) and the movable mold (2) are combined to form a mold cavity (3), characterized in that: The static mold (1) is provided with a flow channel (12) and an injection channel (15) communicating with the mold cavity (3), and the static mold (1) is provided with an ejector pin (4) capable of being inserted into the injection channel (15).

2. The device for producing plastic strip binding staples according to claim 1, characterized in that: A through groove (14) corresponding to the inside and outside of the injection channel (15) is provided on the static mold (1), and one end of the ejector pin (4) is inserted into the through groove (14).

3. The device for producing plastic strip binding staples according to claim 1, characterized in that: The movable mold (2) is provided with an exhaust hole (21) connected to the mold cavity (3), and the other end of the exhaust hole (21) is connected to the receiving groove (22) of the movable mold (2).

4. The device for producing plastic strip binding staples according to claim 1, characterized in that: The movable mold (2) is provided with a notch (24), the static mold (1) is provided with a pressing plate (16) penetrating the notch (24), a side wall of the notch (24) is provided with an inclined abutment surface (241), and the pressing plate (16) presses downward against the abutment surface (241).

5. The device for producing plastic strip binding staples according to claim 4, characterized in that: A resist plate (23) is fixed on the movable mold (2), and a top plate (6) is correspondingly provided on the resist plate (23). The top plate (6) abuts against the resist plate (23) and drives the resist surface (241) to press against the pressure plate (16).

6. The device for producing plastic strip binding staples according to claim 4, characterized in that: The static mold (1) is provided with a slide groove (13), the movable mold (2) is provided with a slide bar (25) slidably arranged in the slide groove (13), the abutting surface (241) presses against the pressure plate (16) along the direction of the slide groove (13), the mold cavity (3) is provided in the static mold (1), and the movable mold (2) is sealed at the upper end of the mold cavity (3).

7. The device for producing plastic strip binding staples according to claim 1, characterized in that: A material delivery pipe (11) communicating with the flow channel (12) is fixed on the static mold (1).

8. A production process for plastic strip binding needles, characterized in that: The following steps are involved: 1) Mold closing and injection molding: the static mold (1) and the movable mold (2) are closed and the molten raw material is injected into the mold cavity (3), and the ejector pin (4) extends into and closes the injection channel (15); 2) Primary cooling and mold opening: The cooling fan (5) blows toward the movable mold (2) so that the temperature of the movable mold (2) side drops faster than that of the static mold (1) side, thereby making it easier for the cooled plastic staples to separate from the movable mold (2) when the mold is opened; 3) Secondary cooling and demoulding: The cooling fan (5) further cools the plastic staples on the static mold (1). When the plastic staples are completely cooled, the ejector pin (4) moves to eject the plastic staples on the static mold (1) and demould.

9. The production process of a plastic strip binding needle according to claim 8, characterized in that: In step 2), the abutting surface (241) is pressed against the pressing plate (16) to drive the movable mold (2) to be pressed against the static mold (1). When the mold needs to be opened, the movable mold (2) is driven to move along the slide groove (13) to separate the pressing plate (16) and the abutting surface (241). At this time, the movable mold (2) and the static mold (1) move relative to each other in an interlaced manner, and the plastic staples are driven to separate from the movable mold (2) through the interlaced shear force.

10. The production process of plastic strip binding needles according to claim 8, characterized in that: In step 1), the ejector pin (4) is located in the through groove (14) during injection. When the injection is completed, the ejector pin (4) moves and blocks the injection channel (15). At this time, the molten raw material in the flow channel (12) can be extracted outward.

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