Die structure capable of preventing product from being scratched

Abstract

The utility model discloses a mould structure for avoiding product scratching, which comprises a vertical fixed plate, a first mould plate, a second mould plate, a third mould plate, a fourth mould plate, a fifth mould plate, a sixth mould plate and a seventh mould plate which are sequentially arranged, all the mould plates can horizontally slide towards one side far away from the fixed plate, a mould cavity is arranged in the second mould plate, a mould core is arranged in the mould cavity, and the mould core is arranged in the mould cavity. A gap is formed between the mold core and the inner wall of the mold cavity to form a forming cavity, a feeding port communicated with the forming cavity is formed in the front end of the mold, a push sleeve arranged on the mold core in a sleeving mode is fixed in the third mold plate, the front end face of the push sleeve abuts against the tail end of the forming cavity and blocks the forming cavity, and auxiliary positioning blocks are fixed to the inner side face and the outer side face of the fourth mold plate respectively. The auxiliary positioning block is matched with the sliding grooves in the second mold plate and the third mold plate and used for assisting in supporting the second mold plate and the third mold plate so that the second mold plate and the third mold plate can keep balance during sliding, the second mold plate and the third mold plate can keep balance during sliding, and therefore the tail end of the mold cavity is prevented from scratching the outer surface of the pen cap.

Description

Technical Field

[0001] The utility model relates to the technical field of cosmetics, in particular to a mold structure for preventing product scratches. Background Art

[0002] When a product injection molding machine is in production, the molten plastic raw material is first injected into the mold. The mold is composed of multiple templates, and each template is slidably connected by a guide column. A mold cavity, a mold core and a push sleeve are respectively provided in the corresponding template. The mold 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 mold cavity, the mold will gradually open according to the set steps. Although the template is supported by the guide column to slide during the opening process, due to the problems of processing accuracy and assembly accuracy, there will inevitably be a gap between the template's sliding sleeve and the guide column, and each template is very heavy. In this way, during the sliding process of the template, it will not be able to maintain balance due to its own weight and will sag slightly, so that when the mold cavity is separated from the product, the bottom edge of the mold cavity will cause scratches on the surface of the product, reducing the product yield. Utility Model Content

[0003] The utility model aims to provide a mold structure for preventing scratches on products. The structure enables the mold cavity to maintain balance during sliding, thereby preventing scratches on the appearance of the product.

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

[0005] A mold structure for preventing product scratches, comprising an upright fixed plate, a first template, a second template, a third template, a fourth template, a fifth template, a sixth template and a seventh template which are arranged in sequence, and each plate is close together, wherein all the templates can slide horizontally to a side away from the fixed plate, a mold cavity is provided in the second template, a mold core is provided in the mold cavity which extends into the fourth template, and 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 communicating with the molding cavity is provided at the front end of the mold, a push sleeve mounted on the mold core is fixed in the third template, the front end face of the push sleeve abuts against the end of the molding cavity and blocks it, horizontally arranged auxiliary positioning blocks are fixed on the inner and outer sides of the fourth template, the auxiliary positioning blocks respectively cooperate with the slide grooves on the second template and the third template, and are used to auxiliary support the second template and the third template to keep them balanced when sliding.

[0006] By adopting the above technical solution, an auxiliary positioning block is fixed on the mold base, and the auxiliary positioning block cooperates with the sliding grooves on the second template and the third template to ensure that the second template and the third template can maintain balance and not sag during the sliding process, thereby avoiding scratches on the outer surface of the pen cap by the end of the mold cavity.

[0007] In a specific implementation manner of the utility model: the auxiliary positioning block is in the shape of an elongated strip, and has an introduction slope on the free end.

[0008] In a specific implementation manner of the utility model: the inner and outer surfaces of the first template, the second template, the third template and the fourth template are all provided with communicating grooves, the upper and lower embedded blocks are respectively fixed in the grooves of the second template and the third template, the slide groove is formed between the upper and lower embedded blocks, the fixed end of the auxiliary positioning block is embedded in the groove of the fourth template, and the free end passes through the slide groove and is inserted into the groove of the first template.

[0009] By adopting the above technical solution, since the insert block and the auxiliary positioning block are both installed on the outer surface of the mold, the gap between the auxiliary positioning block and the insert block can be minimized during assembly, thereby improving the assembly accuracy. In this way, even if there is a gap between the guide column and the template, the auxiliary positioning block can still support the second template and the third template so that they remain balanced when sliding and do not sag.

[0010] In a specific implementation manner of the utility model: the insert is made of wear-resistant material.

[0011] In a specific implementation manner of the utility model: the fourth template, the fifth template, the sixth template and the seventh template are fixed together by bolts to form a mold base, the four corners of the fixed plate are respectively fixed with horizontally arranged first guide columns, the first template, the second template, the third template and the four corners of the mold base are respectively opened with interconnected first through holes, the end of the first guide column passes through the corresponding first through holes of the first template, the second template and the third template in turn and is inserted into the first through hole of the mold base.

[0012] In a specific implementation manner of the utility model: a limiting ring for limiting the moving distance of the second template is sleeved on the end of the first guide column, and a sliding sleeve on the first guide column is fixedly sleeved in the first through hole of the second template.

[0013] In a specific implementation of the utility model: a cavity is provided in the mold base, a movable plate is provided in the cavity, push rods are passed through the fourth template and the fifth template, the lower ends of the push rods are connected to the movable plate, and the upper ends are connected to the third template.

[0014] In a specific implementation of the utility model: a spring is also sleeved on the push rod, and a spring cavity is provided in the fourth template and the fifth template. The spring is located in the spring cavity, with one end against the top wall of the spring cavity and the other end against the front end surface of the moving plate.

[0015] In summary, in the utility model, an auxiliary positioning block is fixed on the mold base, so that in the process of gradually opening each template according to the set steps, in addition to the guide column supporting the sliding of the template, the auxiliary positioning block cooperates with the slide grooves on the second template and the third template, further ensuring that the second template and the third template can maintain balance and not droop during the sliding process, thereby avoiding the appearance of the pen cap from being scratched by the end of the mold cavity, thereby improving the yield rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic structural diagram of a mold structure for preventing product scratches in the utility model;

[0018] Figure 2 It is a cross-sectional view of the mold of the utility model;

[0019] Figure 3 The first mold plate, the second mold plate, the third mold plate and the mold base are shown sliding horizontally backward;

[0020] Figure 4 It shows that the moving plate moves forward, driving the push rod to move forward, and pushing the third template to move forward;

[0021] Figure 5 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 6 It is a structural schematic diagram of the switch of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the limiting bolt of the utility model. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1As shown, the utility model is a mold structure for preventing product scratches, comprising a vertical fixed plate 10, a first template 11, a second template 12, a third template 13, a fourth template 21, a fifth template 22, a sixth template 23 and a seventh template 24 which are arranged in sequence, and each plate is close together. The fixed plate 10 is fixed on an injection molding machine (not shown in the figure). The fourth template 21, the fifth template 22, the sixth template 23 and the seventh template 24 are fixed together by bolts to form a mold base 14. Among them, the first template 11, the second template 12, the third template 13 and the mold base 14 can all slide horizontally to the side away from the fixed plate 10.

[0026] like Figure 2 As shown, horizontally arranged first guide posts 101 are fixed to the four corners of the fixed plate 10. First through holes 1011 communicating with the first guide posts 101 are respectively opened at the four corners of the first template 11, the second template 12, the third template 13 and the mold base 14. The end of the first guide post 101 passes through the first through holes 1011 of the corresponding first template 11, the second template 12 and the third template 13 in sequence and then is inserted into the first through hole 1011 of the mold base 14. There is a gap between the first guide post 101 and the corresponding first through hole 1011. A limiting ring 102 for limiting the moving distance of the second template 12 is sleeved on the end of the first guide post 101. A sliding sleeve 1012 sleeved on the first guide post 101 is fixed in the first through hole 1011 of the second template 12.

[0027] In addition, horizontally arranged second guide columns 103 are fixed to the four corners of the mold base 14. Second through holes 1013 communicating with the second guide columns 103 are respectively opened at the four corners of the third template 13, the second template 12 and the first template 11. The ends of the second guide columns 103 pass through the second through holes 1013 of the third template 13 and the second template 12 in turn, and then are inserted into the second through hole 1013 of the first template 11. Sliding sleeves 1012 sleeved on the second guide columns 103 are installed in the second through holes 1013 of the third template 13 and the second template 12.

[0028] like Figure 2 and Figure 5 As shown, a mold cavity 9 is provided in the second template 12. A mold core 8 is fixed in the fourth template 21, and the mold core 8 passes through the second template 12 and is inserted into the mold cavity 9, and there is a gap between the mold core 8 and the inner wall of the mold cavity 9 to form a cylindrical pen cap molding cavity 6. A feed port 5 communicating with the molding cavity 6 is opened at the front end of the mold. A push sleeve 7 sleeved on the mold core 8 is fixed in the third template 13. A groove 701 is provided on the front end surface of the push sleeve 7, and the bottom surface of the groove 701 abuts against the end surface of the molding cavity 6 and blocks it.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, a cavity 141 is provided in the sixth template 23. A moving plate 15 is provided in the cavity 141.

[0030] A push rod 16 is also provided in the fourth mold plate 21 and the fifth mold plate 22. The lower end of the push rod 16 is connected to the movable plate 15, and the upper end is connected to the third mold plate 13. A movable plate driving mechanism 151 is provided behind the mold base 14. The top rod of the movable plate driving mechanism 151 passes through the seventh mold plate 24 and is connected to the movable plate 15 to drive the movable plate 15 to move.

[0031] A mold base driving mechanism (not shown) is connected to the rear of the mold base 14 to drive the mold base 14 to move. Figure 6 As shown, a shutter 4 is provided in the fourth template 21, and the end 401 passes through the third template 13 and is inserted into the second template 12. In the process of the mold base driving mechanism driving the mold base 14 to move, since the end 401 of the shutter 4 has damping, it can drive the second template 12 to separate from the fixed plate 10. When the second template 12 is stopped by the limit ring 102 and cannot move, the mold base driving mechanism continues to drive to overcome the damping, so that the end 401 is separated from the second template 12, thereby separating the third template 13 from the second template 12. The shutter 4 is a prior art and can be directly purchased on the market, and will not be described here.

[0032] like Figure 7 As shown, in addition, interconnected through holes 3 are provided in the fourth template 21, the third template 13 and the second template 12, and a limiting bolt 301 is provided in the through hole 3. The front end of the limiting bolt 301 is fixed on the first template 11, and the rear end has a stopper 302 located in the through hole 3 of the fourth template 21, and a step 303 is provided in the through hole 3 of the second template 12. In the process of the mold base driving mechanism driving the mold base to move, the first template 11 is stationary at first. When the second template 12 moves along the limiting bolt 301 to the step 303 and contacts the stopper 302 of the limiting bolt 301, it will move with the limiting bolt 301, and then drive the first template 11 to move and separate from the fixed plate 10. It should be noted here that in the injection molding process, the first template 11 plate (i.e., the gate plate) can play a role in guiding and distributing the molten plastic, ensuring that the plastic melt is evenly filled in the molding cavity to complete the product molding. Separating the first template 11 from the fixed plate 10 can facilitate the removal of the edge material adhering to the gate of the first template 11, thereby ensuring the quality of subsequent production.

[0033] In the present invention, the movable plate driving mechanism 151 and the die base driving mechanism are both cylinder driving mechanisms.

[0034] A spring 17 is sleeved on the push rod 16. A spring cavity 142 is provided in the fourth template 21 and the fifth template 22. The spring 17 is located in the spring cavity 142, with one end against the top wall of the spring cavity 142 and the other end against the front end surface of the moving plate 15.

[0035] like Figure 1 and Figure 4 As shown, a long strip of auxiliary positioning blocks 18 are horizontally arranged inside and outside the mold base 14. The free end of the auxiliary positioning block 18 has an introduction slope 181. The auxiliary positioning block 18 is slidably matched with the second mold plate 12 and the third mold plate 13, and is used to support the second mold plate 12 and the third mold plate 13 to keep them balanced when sliding and not drooping.

[0036] In this embodiment, there are two auxiliary positioning blocks 18, which are respectively arranged on the inner and outer surfaces of the fourth template 14. Interconnected grooves 191 are opened on the inner and outer surfaces of the first template 11, the second template 12, the third template 13 and the fourth template 21. The upper and lower embedded blocks 20 are respectively fixed in the grooves 191 of the second template 12 and the third template 13. A slide groove 19 that matches the auxiliary positioning block 18 is formed between the upper and lower embedded blocks 20. The embedded block 20 is made of wear-resistant material, which can ensure processing accuracy and is not easy to wear. The fixed end of the auxiliary positioning block 18 is fixed in the groove 191 of the fourth template 21, and the free end passes through the slide groove 19 and is inserted into the groove 191 of the first template 11. With the above structure, since the insert block 20 and the auxiliary positioning block 18 are both installed on the outer surface of the mold, the gap between the auxiliary positioning block and the insert block can be minimized during assembly, thereby improving the assembly accuracy. In this way, even if there is a gap between the guide column and the template, the auxiliary positioning block can still support the second template and the third template to maintain balance when sliding and not droop.

[0037] During operation, at the beginning, each upright plate is close together, and the molten plastic raw material is injected into the molding cavity 6 from the feed port 5 until the molding cavity 6 is filled. After cooling, the raw material in the molding cavity 6 solidifies to form a pen cap. After that, each template will be gradually opened according to the set steps, so that the molded pen cap is exposed. And in the process of each template gradually sliding backward horizontally, in addition to the guide column supporting the template sliding, at the same time, the two auxiliary positioning blocks 18 are respectively slidably matched with the slide grooves 19 of the second template 12 and the third template 13, which are used to support the second template 12 and the third template 13 to keep them balanced when sliding and not drooping, thereby avoiding scratches on the surface of the pen cap at the end of the mold cavity 9. Subsequently, the driving mechanism 151 drives the moving plate 15 to move forward, drives the push rod 16 to move forward, and then drives the third template 13, so that the push sleeve 7 pushes the pen cap out of the mold core 8. In the process of the movable plate 15 moving forward, the spring 17 is compressed and deformed by the force, and the spring 17 begins to store energy. Then the driving mechanism 151 stops, and the spring 17 begins to release energy, pushing the movable plate 15 to move slightly backward, driving the push rod 16 to move slightly backward, thereby driving the third template 13 to move backward, and then, the driving mechanism 151 starts to drive the movable plate 15 to push the material again to prevent the pen cap from being still on the mold core 8.

[0038] In summary, in the utility model, auxiliary positioning blocks are fixed on the inner and outer sides of the mold base, so that in the process of gradually opening each template according to the set steps, in addition to the guide column supporting the sliding of the template, the auxiliary positioning block cooperates with the slide grooves on the second template and the third template, further ensuring that the second template and the third template can maintain balance and not droop during the sliding process, thereby avoiding the appearance of the pen cap from being scratched by the end of the mold cavity, thereby improving the yield rate of the product.

[0039] 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 mold structure for preventing product scratches, comprising a vertical fixed plate, a first mold plate, a second mold plate, a third mold plate, a fourth mold plate, a fifth mold plate, a sixth mold plate and a seventh mold plate arranged in sequence, and each plate is close together, wherein: All templates can slide horizontally to the side away from the fixed plate, a mold cavity is provided in the second template, a mold core is provided in the mold cavity extending into the fourth template, and 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 communicating with the molding cavity is provided at the front end of the mold, a push sleeve mounted on the mold core is fixed in the third template, the front end surface of the push sleeve abuts against the end of the molding cavity and blocks it, and it is characterized in that horizontally arranged auxiliary positioning blocks are respectively fixed on the inner and outer sides of the fourth template, the auxiliary positioning blocks cooperate with the slide grooves on the second template and the third template, and are used to assist in supporting the second template and the third template so that they maintain balance when sliding.

2. The mold structure for preventing product scratches according to claim 1 is characterized in that: The auxiliary positioning block is in the shape of an elongated strip, and has an introduction slope on the free end.

3. The mold structure for preventing product scratches according to claim 2 is characterized in that: The inner and outer surfaces of the first template, the second template, the third template and the fourth template are all provided with interconnected grooves, and the upper and lower embedded blocks are respectively fixed in the grooves of the second template and the third template, and the slide groove is formed between the upper and lower embedded blocks. The fixed end of the auxiliary positioning block is fixed in the corresponding groove of the fourth template, and the free end passes through the slide groove and is inserted into the groove of the first template.

4. The mold structure for preventing product scratches according to claim 3 is characterized in that: The insert is made of wear-resistant material.

5. The mold structure for preventing product scratches according to claim 1 is characterized in that: The fourth template, the fifth template, the sixth template and the seventh template are fixed together by bolts to form a mold base, the four corners of the fixed plate are respectively fixed with horizontally arranged first guide columns, the first template, the second template, the third template and the four corners of the mold base are respectively opened with interconnected first through holes, the end of the first guide column passes through the corresponding first through holes of the first template, the second template and the third template in turn and is inserted into the first through hole of the mold base.

6. The mold structure for preventing product scratches according to claim 5 is characterized in that: A limiting ring for limiting the moving distance of the second template is sleeved on the end of the first guide column, and a sliding sleeve on the first guide column is fixedly sleeved in the first through hole of the second template.

7. The mold structure for preventing product scratches according to claim 5 is characterized in that: The mold base has a cavity in it, a movable plate is arranged in the cavity, push rods are passed through the fourth mold plate and the fifth mold plate, the lower ends of the push rods are connected to the movable plate, and the upper ends are connected to the third mold plate.

8. The mold structure for preventing product scratches according to claim 7 is characterized in that: A spring is also sleeved on the push rod, and a spring cavity is provided in the fourth template and the fifth template. The spring is located in the spring cavity, with one end of the spring against the top wall of the spring cavity and the other end against the front end surface of the moving plate.

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