Pen cap mold capable of automatically separating product from rim charge

Abstract

The utility model discloses a pen cap mould capable of automatically separating a product from offcut, which comprises a first mould plate, a second mould plate, a third mould plate, a fourth mould plate and a bottom plate, a mould cavity is arranged in the first mould plate, a mould core is arranged in the mould cavity, a gap is arranged between the mould core and the inner wall of the mould cavity to form a pen cap forming cavity, a push sleeve is arranged in the second mould plate, and the push sleeve is arranged in the bottom plate. The mold core is provided with a center hole, a runner is formed in the top of the mold core, an ejector pin is arranged in the needle plate, the lower end of the ejector pin makes contact with the bottom plate, the upper end of the ejector pin is inserted into the runner to block a lower port of the runner, the ejector pin is provided with a transmission head, a transmission cavity is formed in the needle plate, and the transmission head is located in the transmission cavity. The transmission cavity is higher than the transmission head, and in the initial state, a gap is formed between the lower end face of the transmission head and the bottom wall of the transmission cavity. According to the utility model, the pen cap and the offcut are automatically separated when the pen cap is demoulded, the production efficiency is improved, the cost is reduced, and the stability of the quality of the pen cap is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cosmetics, in particular to a pen cap mould which can automatically separate a product from a side material. Background Art

[0002] When a product injection molding machine is in production, the raw material is first injected into the mold. The mold is composed of multiple templates connected in sequence, and the corresponding templates are respectively provided with a molding cavity, a mold core and a push sleeve. The molding cavity is used for the injection and curing of the raw material, the mold core plays the role of fixing the shape of the product, and the push sleeve is used to assist the product to be smoothly pushed out from the mold core. After the raw material is cured and formed in the molding cavity, the mold will gradually open according to the set steps. After the pen cap is demolded, the edge material on the product needs to be manually removed, which is time-consuming and labor-intensive, and due to the existence of human factors, it may also lead to unstable quality of the pen cap. Utility Model Content

[0003] The utility model aims to provide a pen cap mould which can automatically separate the product from the edge material. The structure has a high degree of automation, replaces manual operation, improves production efficiency and ensures the stability of the pen cap quality.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A pen cap mold for automatically separating a product from a side material comprises a first template, a second template, a third template, a fourth template and a bottom plate which are arranged in sequence from top to bottom, a mold cavity is arranged in the first template, a mold core is arranged in the mold cavity and extends downward into the third template, a gap is provided between the mold core and the inner wall of the mold cavity to form a cylindrical pen cap molding cavity, a feed port which communicates with the pen cap molding cavity is provided at the top of the first template, a push sleeve which is sleeved on the mold core is fixed in the second template, an upper end surface of the push sleeve abuts against the end of the pen cap molding cavity and blocks it, a cavity is provided in the fourth template, a mold core which can be opened upwards is provided in the cavity A needle plate moves downward, which is transmission connected to the second template. A center hole is opened in the mold core, and a flow channel communicating with the center hole is formed at the top. A ejector is arranged in the needle plate, and the lower end of the ejector abuts against the bottom plate, and the upper end passes through the center hole upward and is inserted into the flow channel to seal the lower port of the flow channel. A fixing structure for fixing the edge material is arranged in the flow channel. The ejector has a transmission head, and the diameter of the transmission head is larger than the diameter of the rod. A transmission cavity is arranged in the needle plate, and the transmission head is located in the transmission cavity. The height of the transmission cavity is higher than the height of the transmission head. In the initial state, the lower end face of the transmission head is spaced from the bottom wall of the transmission cavity.

[0006] By adopting the above technical solution, the pen cap is exposed by driving the first template to rise. Subsequently, after the needle plate is driven to rise, the push sleeve is driven to rise, and the pen cap is pushed out from the core mold. In the process of the pen cap being gradually pushed out from the mold core by the push sleeve, the edge material is initially stuck in the flow channel by the fixed structure and does not move, so that the pen cap and the edge material in the flow channel are naturally disconnected. As the needle plate is driven to continue to rise, when the bottom wall of the transmission cavity contacts the transmission head of the ejector, the ejector is ejected to eject the edge material in the flow channel, so that the edge material is separated from the core mold again. This structure replaces manual operation, thereby improving overall production efficiency, reducing costs, and ensuring the stability of the quality of the pen cap.

[0007] In a specific implementation manner of the utility model: the flow channel includes a horizontal channel and a vertical channel.

[0008] In a specific implementation manner of the utility model: the lower surface of the horizontal channel has a slope that gradually slopes upward from a main body position to an edge position.

[0009] In a specific implementation manner of the utility model: the fixing structure is an annular groove arranged on the side wall of the vertical channel.

[0010] In summary, the utility model realizes automatic separation of the pen cap and the edge material when the pen cap is demoulded, and manual separation is no longer required, thereby improving production efficiency, reducing costs, and ensuring the stability of the pen cap quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings.

[0012] Figure 1 It is a structural schematic diagram of a pen cap mold for automatically separating the product from the edge material of the utility model;

[0013] Figure 2 It shows that the first template rises, the pen cap is exposed, the needle plate is driven to rise, and the second template is driven to rise, and the push sleeve is driven to rise to push the pen cap out of the mold core;

[0014] Figure 3 It shows that after the bottom wall of the transmission cavity contacts the transmission head of the ejector, the ejector is ejected to eject the edge material in the flow channel;

[0015] Figure 4 yes Figure 1 The enlarged view of point A in the middle;

[0016] Figure 5 It shows that the pen cap is put on the mold core after solidification. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 As shown, the utility model is a pen cap mold that automatically separates the product from the edge material, including a first template 10, a second template 11, a third template 12, a fourth template 13 and a bottom plate 14 arranged in sequence from top to bottom. An upper drive mechanism (not shown in the figure) connected to the first template is provided above the mold, and the upper drive mechanism can drive the first template to separate from the second template. A mold cavity 20 is provided in the first template 10. A mold core 21 is fixed in the third template 12. The upper part of the mold core 21 extends into the mold cavity 20 after passing through the second template 11 upward, and there is a gap between the mold core 21 and the inner wall of the mold cavity 20 to form a cylindrical pen cap molding cavity. The top of the first template 10 has a feed port 101 that communicates with the pen cap molding cavity. A push sleeve 22 that is sleeved on the mold core 21 is fixed in the second template 11, and the upper end surface of the push sleeve 22 abuts against the end of the pen cap molding cavity and blocks it.

[0019] Combination Figure 2 and Figure 3 As shown, a cavity 131 is provided in the fourth template 13. A needle plate 15 is provided in the cavity 131.

[0020] A push rod 16 is also provided in the fourth template 13 and the third template 12. The lower end of the push rod 16 is connected to the needle plate 15, and the upper end is connected to the second template 11. The first template 10 is slidably connected to the second template 11 through a guide rod. The third template 12, the fourth template 13 and the bottom plate are fixed together by bolts.

[0021] like Figure 1 As shown, a center hole 211 is formed in the mold core 21, and a flow channel 31 communicating with the center hole 211 is formed at the top. An ejector pin 32 is provided in the needle plate 15. The lower end of the ejector pin 32 abuts against the bottom plate 14, and the upper end is inserted upward through the center hole 211 into the flow channel 31 to block the lower end of the flow channel 31. The lower portion of the ejector pin 32 has a transmission head 321, and the diameter of the transmission head 321 is larger than the diameter of the rod 322. A transmission cavity 151 is provided in the needle plate 15, and the transmission head 321 is located in the transmission cavity 151. The height of the transmission cavity 151 is higher than the height of the transmission head 321. In the initial state, as shown in FIG. Figure 1 As shown, the lower end surface of the transmission head 321 is spaced apart from the bottom wall of the transmission cavity.

[0022] A lower driving mechanism (not shown) is provided below the mold, and a top rod of the lower driving mechanism passes through a through hole in the bottom plate 14 and is connected to the needle plate 15 to drive the needle plate to move.

[0023] In the utility model, the upper driving mechanism and the lower driving mechanism are cylinder driving mechanisms.

[0024] In this embodiment, the needle plate 15 is assembled from an upper and a lower ejector plate 152. The lower surface of the upper ejector plate 152 and the upper surface 152 of the lower ejector plate have opposite notches. The two opposite notches form a transmission cavity 151. With this structure, it is convenient to process the transmission cavity 151 and to install the transmission head of the ejector 32 in the transmission cavity 151.

[0025] The flow channel 31 includes a horizontal channel 313 and a vertical channel 314. The pen cap molding cavity has a vertical portion and a horizontal portion of equal thickness. The lower surface of the horizontal channel 313 has an inclined surface that gradually tilts upward from the main body position to the edge position. The edge thickness of the horizontal channel 313 is less than the thickness of the horizontal portion of the pen cap molding cavity, and an annular narrow opening 316 is formed at the junction of the two.

[0026] A fixing structure for fixing the edge material is provided in the flow channel 31. In this embodiment, the fixing structure is two annular grooves 315 on the side wall of the vertical channel 314.

[0027] During operation, at the beginning, the templates are stacked together, and the liquid plastic raw material is injected into the flow channel 31 from the feed port 101 at the top of the pen cap molding cavity. When the flow channel 31 is filled, the raw material will flow into the pen cap molding cavity from the surrounding of the horizontal channel 313 of the flow channel 31 until the pen cap molding cavity is filled. After cooling, the raw material in the pen cap molding cavity solidifies to form a product (i.e., a pen cap), and the raw material in the flow channel 31 forms the edge material that needs to be removed. After that, the upper drive mechanism drives the first template 10 to rise, so that the pen cap 9 is exposed. Subsequently, the lower drive mechanism drives the needle plate 15 to drive the push rod 16 to rise, and then drives the second template 11, so that the push sleeve 22 pushes the pen cap 9 out of the core mold 21. Due to the initial state, there is a gap between the lower end surface of the transmission head 321 and the bottom wall of the transmission chamber 151, and the needle plate 15 will not drive the ejector pin 32 to move upward at the beginning, and the ejector pin 32 remains stationary. In addition, because the groove 315 in the flow channel 31 clamps the edge material, and the annular narrow mouth 316 makes it easy to break the connection between the pen cap 9 and the edge material, when the push sleeve 22 pushes the pen cap 9 upward, the pen cap 9 is separated from the edge material before leaving the core mold 21, and the edge material is still retained on the core mold 21. As the needle plate 15 is driven to continue to rise, when the bottom wall of the transmission chamber 151 contacts the transmission head 321 of the ejector pin 32, the ejector pin 32 is ejected, and the edge material in the flow channel 31 is ejected, so that the edge material is separated from the core mold again.

[0028] It can be seen from the above detailed introduction that the utility model realizes automatic separation of the pen cap and the edge material when the pen cap is demoulded, and manual separation is no longer required, thereby improving production efficiency, reducing costs, and ensuring the stability of the pen cap quality.

[0029] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A pen cap mold for automatically separating a product from a side material, comprising a first template, a second template, a third template, a fourth template and a bottom plate arranged in sequence from top to bottom, a mold cavity is provided in the first template, a mold core is provided in the mold cavity and extends downward into the third template, a gap is provided between the mold core and the inner wall of the mold cavity to form a cylindrical pen cap molding cavity, a feed port communicated with the pen cap molding cavity is provided at the top of the first template, a push sleeve is fixed on the mold core in the second template, the upper end surface of the push sleeve abuts against the end of the pen cap molding cavity and blocks it, a cavity is provided in the fourth template, a needle plate that can move up and down is provided in the cavity, and the needle plate is transmission-connected to the second template, characterized in that A center hole is opened in the mold core, and a flow channel communicating with the center hole is formed at the top. A pin is arranged in the needle plate, and the lower end of the pin abuts against the bottom plate, and the upper end passes upward through the center hole and is inserted into the flow channel to seal the lower port of the flow channel. A fixing structure for fixing the edge material is arranged in the flow channel. The pin has a transmission head, and the diameter of the transmission head is larger than the diameter of the rod. A transmission cavity is arranged in the needle plate, and the transmission head is located in the transmission cavity. The height of the transmission cavity is higher than the height of the transmission head. In the initial state, the lower end surface of the transmission head is spaced from the bottom wall of the transmission cavity.

2. The pen cap mold for automatically separating the product from the edge material according to claim 1, characterized in that: The flow channel includes a horizontal channel and a vertical channel.

3. The pen cap mold for automatically separating the product from the edge material according to claim 2, characterized in that: The lower surface of the horizontal channel has an inclined surface which gradually slopes upward from a main body position to an edge position.

4. The pen cap mold for automatically separating the product from the edge material according to claim 2, characterized in that: The fixing structure is an annular groove arranged on the side wall of the vertical channel.

5. The pen cap mold for automatically separating the product from the edge material according to claim 1, characterized in that: The needle plate is assembled from an upper needle plate and a lower ejector needle plate.

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