Injection mold

Abstract

The utility model provides an injection mold which comprises an upper mold plate and a lower mold plate, the upper mold plate and the lower mold plate are sequentially arranged, one side, close to the lower mold plate, of the upper mold plate is connected with an upper mold core, and one side, close to the upper mold plate, of the lower mold plate is connected with a lower mold core. The lower mold plate is slidably connected with a sliding block, and the upper mold plate is connected with an inclined guide column. During mold closing, the inclined guide column extends into a through hole formed in the sliding block, the upper mold core abuts against the lower mold core, one side of the sliding block abuts against the upper mold core and the lower mold core, the upper mold core, the lower mold core and the sliding block form a mold cavity, the mold cavity is in a transversely-arranged Y shape, the mold cavity forking parts are arranged on the upper side and the lower side of the sliding block respectively, and the pouring gate is formed in the end face of the side, away from the sliding block, of the mold cavity. The pouring gate is arranged on the end face, the residual material of the pouring gate is cut off in combination with the subsequent punching process, and under the condition that no additional process is added, it is ensured that the overall appearance quality of a punched product is high, the surface smoothness of the product is high, and the bacterium hiding space is reduced.

Description

Technical Field

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

[0002] Injection molded parts used in the medical field have stringent requirements. The unique shape of this product requires uniform melt filling and guaranteed product quality to ensure its interoperability with other components. To reduce the space for bacteria to harbor and mitigate the risk of infection, a high-quality surface finish is essential. Conventional gate designs leave residual material after the melt cools, which easily adheres to the product and is difficult to remove cleanly, resulting in an uneven surface that fails to meet these requirements.

[0003] Therefore, the above problems need to be solved urgently. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides an injection mold, which can produce multiple parts by one injection molding, thereby improving production efficiency. The gate residue is easy to remove. After the gate residue is removed, the appearance quality and surface smoothness of the workpiece are guaranteed, and the space for bacteria to hide is reduced.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides an injection mold, comprising an upper template and a lower template, which are arranged in sequence, with the upper template being connected to an upper mold core on the side close to the lower template, and the lower template being connected to a lower mold core on the side close to the upper template. The lower template is slidably connected to a slider, and the upper template is connected to an inclined guide column. When the mold is closed, the inclined guide column extends into the through hole provided on the slider, the upper mold core and the lower mold core abut each other, and one side of the slider abuts against the upper mold core and the lower mold core, and the upper mold core, the lower mold core and the slider form a mold cavity. The mold cavity is arranged in a horizontal Y-shape, and the bifurcations of the mold cavity are respectively arranged on the upper and lower sides of the slider, and the gate is arranged on the end face of the mold cavity away from the slider. When using the present invention for production, the mold needs to be connected to an injection molding machine, and then the upper and lower templates are closed, the inclined guide column pushes the slider to move, and one side of the slider abuts against the upper and lower mold cores to form a mold cavity, and molten material is injected into the mold cavity. After the molten material cools, the upper and lower templates are separated and the molded product is taken out. The utility model has high production efficiency. When demoulding, the slider demoulds laterally, which improves the flexibility of the mold, makes it easier for the product to be ejected from the mold cavity, and reduces labor costs. The Y-shaped mold cavity allows the plastic melt to quickly enter the mold cavity, and the gate is set at the end face away from the bifurcation of the mold cavity, which is conducive to filling the bifurcation part of the mold cavity at the same time, ensuring the pressure balance of the bifurcation part of the mold cavity, ensuring that the bifurcation part of the mold cavity is fully filled with molten material, and ensuring product quality. The traditional injection molding method is to set the gate at the intersection of the center of the product to ensure uniform pressure in all directions, but the gate residue at the center is not easy to remove and is prone to leaving residue. The utility model sets the gate at the end face away from the bifurcation side. After cooling and molding, the gate residue is punched out through a subsequent punching process. After the gate residue at the end face is removed, the cut surface becomes the end face of the product. The utility model sets the gate on the end face and cuts off the gate residue in combination with the subsequent punching process. The gate residue can also be cut off together with part of the end face. Without adding additional processes, it ensures that the overall appearance quality of the product after punching is high, the surface finish of the product is high, and the space for bacteria to hide is reduced.

[0006] Furthermore, in the above-mentioned injection mold, the mold cavity includes a first mold cavity, a second mold cavity, and a third mold cavity, and the first mold cavity, the second mold cavity, and the third mold cavity are connected to form a horizontal Y-shape. The slider is provided with an insert. When the mold is closed, the insert extends between the upper mold core and the lower mold core, the upper side of the insert abuts against the upper mold core, and the lower side of the insert abuts against the lower mold core. The upper mold core and the lower mold core abut to form a first mold cavity, the upper side of the insert abuts against the upper mold core to form a second mold cavity, and the lower side of the insert abuts against the lower mold core to form a third mold cavity. When the mold is closed, the insert extends between the upper mold core and the lower mold core to form the first mold cavity, the second mold cavity, and the third mold cavity that are interconnected. Injecting molten material into the second mold cavity and the third mold cavity through the first mold cavity can ensure the pressure balance of the second mold cavity and the third mold cavity, thereby ensuring product quality.

[0007] Furthermore, in the above-mentioned injection mold, an upper mold core is provided with an upper cavity on the side close to the lower mold core, and a lower mold core is provided with a lower cavity on the side close to the upper mold core. An upper groove is provided on the upper side of the inlay, and a lower groove is provided on the lower side of the inlay, and the upper groove and the lower groove are connected on the side of the inlay away from the inclined guide column. When the mold is closed, the upper cavity away from the upper groove and the lower cavity away from the lower groove constitute a first mold cavity, the upper cavity close to the upper groove and the upper groove constitute a second mold cavity, and the lower cavity close to the lower groove and the lower groove constitute a third mold cavity. When the mold is closed, the inlay is embedded between the upper mold core and the lower mold core, forming horizontal Y-shaped mold cavities along the upper and lower sides of the inlay, respectively. The gate is provided on the end face of the mold cavity away from the inlay, which can enable the plastic melt to quickly enter the mold cavity, which is conducive to simultaneously filling the second mold cavity and the third mold cavity provided on the upper and lower sides. After mold separation, the gate can be easily removed by punching, and the incision becomes the end face of the product, which does not affect the appearance quality of the workpiece and improves the surface finish of the workpiece.

[0008] Furthermore, in the above-mentioned injection mold, two or more upper bosses are provided along the upper cavity, and the two sides of the upper bosses are set as inclined surfaces, and the upper bosses are arranged along the long side of the upper cavity. The lower cavity is provided with two or more lower bosses, and the two sides of the lower bosses are set as inclined surfaces, and the lower bosses are arranged along the long side of the lower cavity. The upper boss and the lower boss are arranged correspondingly. When the mold is closed, the upper boss and the lower boss abut. The molten material fills around the upper boss and the lower boss to form holes on the product. When the mold is parted, the upper boss and the lower boss are separated in turn to reduce the parting force and avoid damage to the product caused by parting. The bottom surface of the upper groove is provided with an upper long groove, and there are four upper long grooves, and the upper long grooves are arranged in pairs in parallel. The bottom of the lower groove is provided with a lower long groove, and there are two lower long grooves, and the lower long grooves are arranged along the long side of the lower groove.

[0009] Furthermore, in the above-mentioned injection mold, two upper grooves and two lower grooves are provided respectively, and the upper grooves and the lower grooves are respectively arranged parallel to the sliding direction of the slider, the upper groove is arranged on the upper side of the inlay, and the lower groove is arranged on the lower side of the inlay. The upper cavity and the upper groove are arranged correspondingly, and the lower cavity and the lower groove are arranged correspondingly. The above-mentioned arrangement enables one slider of the utility model to mold two workpieces at the same time, thereby improving production efficiency. There are two sliders, and the sliders are symmetrically arranged on both sides of the lower mold core. One slider is provided with two mold cavities, and two sliders are provided, and there are four mold cavities. Multiple workpieces can be produced by one molding, thereby further improving production efficiency and reducing production costs.

[0010] Furthermore, in the above-mentioned injection mold, the upper mold core is provided with a pouring gate, which is arranged between the two sliders, so that the molten material enters the mold cavity from the center of the mold, ensuring complete filling, reducing the shear force on the molten material during flow, and improving the performance of the plastic part.

[0011] Furthermore, in the above-mentioned injection mold, a pin mechanism is connected to the side of the lower mold plate away from the upper mold plate, and the pin mechanism extends into the mold cavity. The pin mechanism ejects the injection-molded product from the mold cavity, so that the product automatically falls out.

[0012] Furthermore, in the above-mentioned injection mold, a panel is connected to a side of the upper mold plate away from the lower mold plate, and a bottom plate is connected to a side of the ejector mechanism away from the lower mold plate.

[0013] Furthermore, in the aforementioned injection mold, the ejector mechanism includes an ejector pad, which is connected to the side of the base plate near the lower mold plate. The ejector pad is connected to an ejector retaining plate on the side away from the base plate. The ejector retaining plate is penetrated by the ejector. The end of the ejector, which is away from the lower mold plate, abuts the ejector pad. The end of the ejector, which is away from the ejector pad, extends into the mold cavity. Mold angles are provided on either side of the ejector retaining plate, each connected to the base plate. The ejector pad pushes the ejector along the mold angle, ensuring its stability and preventing damage to the product from the ejector's movement.

[0014] Furthermore, in the aforementioned injection mold, a stopper is connected to the upper mold plate, positioned adjacent to the slider. The side of the stopper closest to the slider is inclined, while the side of the slider closest to the stopper is inclined in a manner corresponding to the stopper. When the mold is closed, the stopper compresses the slider, ensuring that it moves to the intended position, thus preventing product defects caused by the slider not being in place. During the injection molding process, the stopper prevents the slider from being displaced by the molten plastic, thereby ensuring product quality.

[0015] It can be seen from the above technical solution that the utility model has the following beneficial effects: the injection mold of the utility model can produce multiple workpieces in one molding by providing multiple mold cavities, thereby improving production efficiency and reducing production costs. During injection molding, the insert is embedded between the upper mold core and the lower mold core, and a horizontal Y-shaped mold cavity is formed along the upper and lower sides of the insert. The gate is set on the end face of the mold cavity away from the insert, which can enable the plastic melt to quickly enter the mold cavity, which is conducive to simultaneously filling the second mold cavity and the third mold cavity provided on the upper and lower sides, ensuring the balance of filling pressure in the second mold cavity and the third mold cavity, and ensuring product quality. The gate is set on the end face, and the gate residue is cut off in combination with the subsequent punching process. The gate residue can also be cut off together with part of the end face. Without adding additional processes, the overall appearance quality of the punched product is ensured to be high, the surface finish of the product is high, and the space for bacteria to hide is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the injection mold of the utility model;

[0017] Figure 2 This is a top view of the injection mold of the utility model;

[0018] Figure 3 for Figure 2 The AA sectional view is shown;

[0019] Figure 4 for Figure 2 The BB sectional view is shown;

[0020] Figure 5 for Figure 3 Partial enlarged view;

[0021] Figure 6 A bottom view of the upper mold core;

[0022] Figure 7 A top view of the lower mold core;

[0023] Figure 8 A schematic diagram of the structure of the slider;

[0024] Figure 9 A top view of the slider;

[0025] Figure 10 This is a bottom view of the slider.

[0026] In the figure: 1. panel, 2. upper template, 21. upper mold core, 211. upper cavity, 2111. upper boss, 22. inclined guide column, 23. pouring gate, 24. stopper, 3. lower template, 31. lower mold core, 311. lower cavity, 3111 lower boss, 32. slider, 321. inlay, 3211. upper groove, 3212. lower groove, 3213. upper long groove, 3214. lower long groove, 4. ejector mechanism, 41. ejector pad, 42. ejector fixing plate, 43. ejector, 44. mold angle, 5. bottom plate, 100. mold cavity, 101. first mold cavity, 102. second mold cavity, 103. third mold cavity. DETAILED DESCRIPTION

[0027] Example 1

[0028] like Figure 1-4An injection mold shown includes an upper mold plate 2 and a lower mold plate 3. The upper mold plate 2 and the lower mold plate 3 are arranged in sequence. The upper mold plate 2 is connected to an upper mold core 21 on the side close to the lower mold plate 3, and the lower mold plate 3 is connected to a lower mold core 31 on the side close to the upper mold plate 2. The lower mold plate 3 is slidably connected to a slider 32, and the upper mold plate 2 is connected to an inclined guide post 22. When the mold is closed, the inclined guide post 22 extends into the through hole provided in the slider 32, the upper mold core 21 and the lower mold core 31 abut, and one side of the slider 32 abuts the upper mold core 21 and the lower mold core 31. The upper mold core 21, the lower mold core 31 and the slider 32 form a mold cavity 100. The mold cavity 100 is in a horizontal Y-shape, and the bifurcations of the mold cavity 100 are respectively arranged on the upper and lower sides of the slider 32, and the gate is arranged on the end face of the mold cavity 100 away from the slider 32. The lower template 3 is connected to an ejector mechanism 4 on the side away from the upper template 2. The ejector mechanism 4 extends into the mold cavity 100, and the ejector mechanism 4 ejects the molded product from the mold cavity 100. The upper template 2 is connected to a panel 1 on the side away from the lower template 3, and the ejector mechanism 4 is connected to a base plate 5 on the side away from the lower template 3. The ejector mechanism 4 includes an ejector pad 41, which is connected to the side of the base plate 5 close to the lower template 3. The ejector pad 41 is connected to an ejector fixing plate 42 on the side away from the base plate 5. The ejector fixing plate 42 is penetrated by an ejector 43. The end of the ejector 43 away from the lower template 3 abuts against the ejector pad 41, and the end of the ejector 43 away from the ejector pad 41 extends into the mold cavity 100. Mold angles are respectively provided on both sides of the ejector fixing plate 42, and the mold angles are respectively connected to the base plate 5. The ejector fixing plate 42 is connected to a guide post, which is slidably connected to the lower mold plate 3. The guide post is sleeved with a spring, the upper end of which abuts the lower mold plate 3, and the lower end of which abuts the ejector fixing plate 42. The upper mold plate 2 is connected to a stopper 24, which is positioned near the slider 32. The side of the stopper 24 near the slider 32 has an inclined surface, and the side of the slider 32 near the stopper 24 has an inclined surface corresponding to the stopper 24.

[0029] When using the present invention for production, the upper mold plate 2 and the lower mold plate 3 are closed, the inclined guide pin 22 pushes the slider 32 to move, and one side of the slider 32 abuts the upper mold core 21 and the lower mold core 31 to form a mold cavity 100. The block 24 squeezes the slider 32 to ensure that the slider 32 moves to the predetermined position, and the molten material is injected into the mold cavity 100. After the molten material cools, the upper mold plate 2 and the lower mold plate 3 are separated, the block 24 is removed, the inclined guide pin 22 pushes the slider 32 to exit, the ejector mechanism 4 is activated, the ejector pad 41 pushes the ejector 43, and then the ejector 43 pushes the product out of the mold cavity. The spring on the guide pin resets the ejector 43, and the demoulding is completed. After the demoulding, the gate residue of the product is punched out through the subsequent punching process. After the gate residue at the end face is removed, the cut surface becomes the end face of the product.

[0030] like Figure 5The injection mold shown in FIG. 1 includes a mold cavity 100 comprising a first mold cavity 101, a second mold cavity 102, and a third mold cavity 103. The first, second, and third mold cavities 101, 102, and 103 are connected to form a horizontal Y-shape. A slider 32 is provided with an insert 321. When the mold is closed, the insert 321 extends between the upper mold core 21 and the lower mold core 31. The upper side of the insert 321 abuts the upper mold core 21, while the lower side of the insert 321 abuts the lower mold core 31. The upper and lower mold cores 21, 31 abut to form the first mold cavity 101. The upper side of the insert 321 and the upper mold core 21 form the second mold cavity 102, while the lower side of the insert 321 and the lower mold core 31 form the third mold cavity 103.

[0031] like Figure 6-10 The injection mold shown in the figure has an upper cavity 211 on the side of the upper mold core 21 near the lower mold core 31, and a lower cavity 311 on the side of the lower mold core 31 near the upper mold core 21. An upper groove 3211 is provided on the upper side of the insert 321, and a lower groove 3212 is provided on the lower side of the insert 321. The upper groove 3211 and the lower groove 3212 are connected on the side of the insert 321 away from the inclined guide pillar 22. When the mold is closed, the side of the upper cavity 211 away from the upper groove 3211 and the side of the lower cavity 311 away from the lower groove 3212 form the first mold cavity 101, the side of the upper cavity 211 near the upper groove 3211 and the upper groove 3211 form the second mold cavity 102, and the side of the lower cavity 311 near the lower groove 3212 and the lower groove 3212 form the third mold cavity 103. Two or more upper bosses 2111 are provided along the upper cavity 211, with inclined surfaces on both sides of the upper bosses 2111, and the upper bosses 2111 are arranged along the long side of the upper cavity 211. Two or more lower bosses 3111 are provided on the lower cavity 311, with inclined surfaces on both sides of the lower bosses 3111, and the lower bosses 3111 are arranged along the long side of the lower cavity 311. The upper bosses 2111 and the lower bosses 3111 are arranged correspondingly. When the mold is closed, the upper bosses 2111 and the lower bosses 3111 abut against each other. The bottom surface of the upper groove 3211 is provided with upper elongated grooves 3213, and there are four upper elongated grooves 3213, and the upper elongated grooves 3213 are arranged in pairs in parallel. The bottom surface of the lower groove 3212 is provided with lower elongated grooves 3214, and there are two lower elongated grooves 3214, and the lower elongated grooves 3214 are arranged along the long side of the lower groove 3212.

[0032] This product is a Y-shaped workpiece. During injection molding, the insert 321 is embedded between the upper mold core 21 and the lower mold core 31, forming a horizontal Y-shaped cavity 100 along the upper and lower sides of the insert 321. The gate is located on the end face of the cavity 100 away from the insert 321. Two upper grooves 3211 and two lower grooves 3212 are provided. The upper groove 3211 is arranged parallel to the sliding direction of the slider 32 and is located on the upper side of the insert 321. The lower groove 3212 is arranged parallel to the sliding direction of the slider 32 and is located on the lower side of the insert 321. The upper cavity 211 and the upper groove 3211 are arranged correspondingly, and the lower cavity 311 and the lower groove 3212 are arranged correspondingly. Two sliders 32 are provided, symmetrically arranged on either side of the lower mold core 31. The upper mold core 21 is provided with a pouring gate 23 , which is provided between two sliders 32 , so that the molten material enters the mold cavity 100 from the center of the mold, ensuring complete filling and improving the performance of the plastic part.

[0033] The above embodiments are illustrative and intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An injection mold, characterized in that: The mold comprises an upper mold plate (2) and a lower mold plate (3), wherein the upper mold plate (2) and the lower mold plate (3) are arranged in sequence, wherein the upper mold plate (2) is connected to an upper mold core (21) on a side close to the lower mold plate (3), and the lower mold plate (3) is connected to a lower mold core (31) on a side close to the upper mold plate (2); the lower mold plate (3) is slidably connected to a slider (32), and the upper mold plate (2) is connected to an inclined guide column (22); when the mold is closed, the inclined guide column (22) extends into the slider (32) to form a mold. In some through holes, the upper mold core (21) and the lower mold core (31) are in contact with each other, and one side of the slider (32) is in contact with the upper mold core (21) and the lower mold core (31). The upper mold core (21), the lower mold core (31) and the slider (32) form a mold cavity (100). The mold cavity (100) is set to a horizontal Y-shape. The mold cavity (100) is bifurcated and respectively arranged on the upper and lower sides of the slider (32). The gate is set on the end face of the mold cavity (100) away from the slider (32).

2. The injection mold according to claim 1, characterized in that: The mold cavity (100) includes a first mold cavity (101), a second mold cavity (102), and a third mold cavity (103), wherein the first mold cavity (101), the second mold cavity (102), and the third mold cavity (103) are connected to form a horizontal Y-shape; the slider (32) is provided with an insert (321); when the mold is closed, the insert (321) extends between the upper mold core (21) and the lower mold core (31), the upper side of the insert (321) abuts against the upper mold core (21), the lower side of the insert (321) abuts against the lower mold core (31), the upper mold core (21) and the lower mold core (31) abut to form the first mold cavity (101), the upper side of the insert (321) and the upper mold core (21) form the second mold cavity (102), and the lower side of the insert (321) and the lower mold core (31) form the third mold cavity (103).

3. The injection mold according to claim 2, characterized in that: An upper mold cavity (211) is provided on a side of the upper mold core (21) close to the lower mold core (31), and a lower mold cavity (311) is provided on a side of the lower mold core (31) close to the upper mold core (21); an upper groove (3211) is provided on the upper side of the inlay portion (321), and a lower groove (3212) is provided on the lower side of the inlay portion (321); the upper groove (3211) and the lower groove (3212) are connected on a side of the inlay portion (321) away from the inclined guide column (22); When the mold is closed, the side of the upper mold cavity (211) away from the upper groove (3211) and the side of the lower mold cavity (311) away from the lower groove (3212) form a first mold cavity (101), the side of the upper mold cavity (211) close to the upper groove (3211) and the upper groove (3211) form a second mold cavity (102), and the side of the lower mold cavity (311) close to the lower groove (3212) and the lower groove (3212) form a third mold cavity (103).

4. The injection mold according to claim 3, characterized in that: Two or more upper bosses (2111) are provided along the upper cavity (211), and both sides of the upper bosses (2111) are set as inclined surfaces, and the upper bosses (2111) are arranged along the long side of the upper cavity (211); the lower cavity (311) is provided with two or more lower bosses (3111), and both sides of the lower bosses (3111) are set as inclined surfaces, and the lower bosses (3111) are arranged along the long side of the lower cavity (311); the upper bosses (2111) and the lower bosses (3111) correspond to The upper boss (2111) and the lower boss (3111) are in contact with each other when the mold is closed; the bottom surface of the upper groove (3211) is provided with an upper long groove (3213), four of which are arranged in pairs; the bottom surface of the lower groove (3212) is provided with a lower long groove (3214), two of which are arranged along the long side of the lower groove (3212).

5. The injection mold according to claim 4, characterized in that: There are two upper grooves (3211) and two lower grooves (3212), respectively, and the upper grooves (3211) and the lower grooves (3212) are respectively arranged parallel to the sliding direction of the slider (32); the upper cavity (211) and the upper groove (3211) are arranged correspondingly, and the lower cavity (311) and the lower groove (3212) are arranged correspondingly; there are two sliders (32), and the sliders (32) are symmetrically arranged on both sides of the lower mold core (31); there are four symmetrical mold cavities (100), and the mold cavities (100) are connected through flow channels.

6. The injection mold according to claim 5, characterized in that: The upper mold core (21) is provided with a pouring port (23), the pouring port (23) is provided between two sliders (32), and the pouring port (23) is connected to the mold cavity (100) through a flow channel.

7. The injection mold according to claim 1, characterized in that: The lower template (3) is connected to a pin mechanism (4) on a side away from the upper template (2), and the pin mechanism (4) extends into the mold cavity (100). The pin mechanism (4) ejects the injection-molded product from the mold cavity (100).

8. The injection mold according to claim 7, characterized in that: The upper template (2) is connected to a panel (1) on a side away from the lower template (3), and the ejector mechanism (4) is connected to a bottom plate (5) on a side away from the lower template (3).

9. The injection mold according to claim 7, characterized in that: The ejector mechanism (4) includes an ejector pad (41), the ejector pad (41) being connected to a side of the bottom plate (5) close to the lower mold plate (3), the ejector pad (41) being connected to an ejector fixing plate (42) on a side away from the bottom plate (5), an ejector (43) being passed through the ejector fixing plate (42), the ejector (43) being in contact with the ejector pad (41) at one end away from the lower mold plate (3), and the ejector (43) being extended into the mold cavity (100) at one end away from the ejector pad (41); and mold angles being respectively provided on both sides of the ejector fixing plate (42), and the mold angles being respectively connected to the bottom plate (5).

10. The injection mold according to claim 1, characterized in that: The upper mold plate (2) is connected to a stopper (24), the stopper (24) is arranged close to the slider (32), the side of the stopper (24) close to the slider (32) is an inclined surface, and the side of the slider (32) close to the stopper (24) is an inclined surface corresponding to the stopper (24); when the mold is closed, the stopper (24) squeezes the slider (32).

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